RU2427463C2 - Door frame mould - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to mould for producing door frames with openings intended for paneling or glassing. Frames are made from conglomerate of wood particles and glue arranged in layers to produce sandwich structure with its outer layers made from smaller-size particles with higher density relative to inner layer that features greater thickness and is made from larger particles. Material is fed from moulding machine to fill moulds and compacted between two heating plates of the mould. Mould comprises stationary perimetric frame that follows the door frame outline or that of its several surfaces to produce simultaneously several door frames and separated them by cutting. Note here that perimetric frame height exceeds thickness of door frame before compaction. Mould bottom horizontal platform may move vertically and be driven hydraulically. First rectangular frame made integral with said platform rests thereon. Frame sizes comply with those of perimetric frame opening. Said frame may slide in perimetric frame inner part like a plunger. Mould first rectangular frame surface incorporates so many openings as many door frames may be moulded at a time. Besides, mould is made up of one or more independent second rectangular frame arranged to perform telescopic displacement inside every opening of first rectangular fame and make remaining surface of door frame with its relevant openings. Note also that they may be driven by hydraulic cylinders and feature the height of the first rectangular door frame. Mould top plate may move vertically and doubles as heating plate driven by hydraulic drive in mould closing on placing in contact with stationary peripheral plate.

EFFECT: reduced wastes, ruling out machining and higher rigidity of peripheral zone.

28 cl, 30 dwg

Description

The purpose of the invention

As indicated in the title of this description, the present invention relates to a form for the manufacture of door frames (frames), which includes significant advantageous characteristics for such a door manufacturing system and, above all, if the doors must contain voids (openings) for finishing with panel or glazing known form, quantity and location.

Door frames are formed by pressing a layer of a conglomerate of wood particles and glue coming out of the forming machine in a portal press with heating plates to achieve the standard final door thickness. Then their edges are processed, and after the grinding process, thin layers of decorative wood are glued that define the visual surface of the door.

The conglomerate of wood and glue particles that form the door panels is not uniform and usually is a sandwich structure consisting of a central layer with a larger particle size, low density and greater thickness than two outer layers with smaller particles, higher density and smaller than the central layer. If the material used is DM, a single forming machine is used.

The aim of the present invention is to enable automatic manufacturing of door frames with different standard thicknesses, as well as changing the size, number and location of openings for finishing panels or glass inserts.

The aim of the present invention is also to provide the periphery of the mold to obtain a larger amount of a mixture of wood and glue than the rest, which makes it possible to achieve a higher density in this area of the perimeter during compaction or pressing, which would even mean that there is no need to coordinate thick glued edges in the subsequent action usually added to provide rigidity to the peripheral zone, in particular in horizontal or vertical webs into which the fittings are to be inserted hinges and lock sets. In contrast, and due to the very compact peripheral zone of the door frame obtained by this molding system, the edge processing is necessary only to adjust the quality of the visible materials from decorative wood from an aesthetic point of view so that the door gives the impression of a solid wood of the same grade that and layered material. If the structure is a sandwich structure, more material is used for the middle layer.

BACKGROUND OF THE INVENTION

Currently, particle boards are produced by a continuous process in molding machines, which are poured onto the belt conveyor belt with the first layer of a higher density product and small wood particles mixed with glue and other active products. A second layer of greater thickness, lower density and smaller particles is added to this layer, and then another layer, similar to the first, is added, poured by another molding machine, creating a sandwich structure. This layer of wood particles and glue may consist of particles of the same size with a uniform composition, including well-known materials such as DM.

Regardless of the structure and composition of the layer that will be formed after pressing the plate to the required door thickness, it initially has a thickness of the order of 90-170 mm, which is poured onto the conveyor belt, and after pressing in a press with heating plates it receives a thickness of 25-40 mm for standard doors.

Then it is cut by the plate manufacturer in accordance with the dimensions specified by the door manufacturer, in order to simplify the movement and transportation, which is difficult due to the large size of the resulting paintings.

The door manufacturer cuts these plates and processes them to produce doors of a given size, excluding sections corresponding to openings that need to be trimmed with panels or into which glass should be inserted.

In the patent for invention P-200501869 a system for manufacturing chipboards for doors with the simultaneous formation of openings for finishing with panels or glass inserts, in which the layer coming from one or three molding machines, depending on whether it has a constant density or consists of three layers of different density with a sandwich structure, take on trays or shapes, the width of which preferably corresponds to the length of the doors to be manufactured and the length of which is several widths of the latter, with special m feature consisting in that the bottom tray is fitted with holes of equal size corresponding to the inner surfaces of the openings which must be trimmed paneling or glazing.

The mold or tray includes some telescopic formwork along the contour of each hole, which provides such a retractable (retractable) characteristic so that the layer of conglomerated wood particles and glue can be taken at the initial height before pressing, and which allows a difference in the thickness to be absorbed to the thickness that it should have after compression of the two heating plates of the gantry press, in which traditionally compaction or compression is performed.

Layer portions or particles mixed with glue that fill these openings seep through the openings and are collected by the lower conveyor belt for reuse, as they are sent directly to the respective hoppers of the molding machines.

When mounting in accordance with this cited patent for the invention, there is an elevator feed device for trays that extends onto the conveyor belt and continuously passes under molding machines that unload the product onto these trays. Then they advance to the prepress station, where the layer thickness is approximately reduced to half and air is removed. Using another elevator, the trays are loaded into the gap between the heating plates of the press, and then another elevator collects them, directing them to the post for removing the product from the mold.

In the first additional patent (Patent of Addition) of this main patent for the invention, which is cited in this document, the design of the tray and its guiding system have been improved and simplified. The retractable formwork was made in the form of a simple triangular part and an elastic deflecting layer, which were previously proposed in this main patent for the invention, ideally absorbing the thickness of the layer of conglomerated particles and glue before and after pressing.

In the second additional patent (Patent of Addition) of this main patent of the invention, which is cited in this document, some improvements were made in equipping the front edges of the trays with several supports, while these supports are equipped with a protruding part in the form of a hook, which is connected by a tooth provided in the traction chains for the group loader and unloader of the press at various levels that are available on the heating plates of this press. Other supports with a protruding support are also mounted on the rear support of the tray, where the hook corresponding to the front part engages with the adjacent rear tray. New trays are loaded into the press at the same time as they have already been pressed. A trolley loader is provided that takes them according to one of the pre-presses and lifts them as the trolleys are received until the loading is completed. Both the loader and the unloader include a pair of conveyor chains on which the trays for each level of the press lie and are supported on a bridge structure that slides along the hydraulic conveyor to connect the loader trays to the press trays and to connect the unloader trays to the pre-pallets, respectively .

Description of the invention

In General, the form for the manufacture of door frames, which is the aim of the invention, has a particular application in the manufacture of door frames, which must have openings of a given shape, quantity and location for trim paneling or glazing. It has a special characteristic that there is no material waste in the production, or at least there is no need to re-direct it to the hoppers of the molding machines for reuse, since the door is perfectly made and processed, there is no finishing lamination only, without which any machining. Upon receipt of various layers of the sandwich structure to be formed or one layer in the case of using DM material in the form in which it is also pressed, the periphery (external sections) of the door frame also receives a larger amount of conglomerate for its middle layer than for the rest. Therefore, when compacting or pressing, a higher density is obtained, which means that there is no need to perform the subsequent operation of gluing thick edges, which is usually added to provide rigidity to the peripheral zone (first of all, along horizontal or vertical borders, on which the accessories for hinge and lock assembly should be hung) ) All this is necessary to perform edge processing to even out the quality of visible materials made from valuable wood from an aesthetic point of view in order for the door to create the impression of solid wood.

According to the invention, the production line includes two molding machines in which a conglomerate of wood particles and glue with two densities and with two particle sizes, which are required to form a sandwich structure or a door frame structure, as previously mentioned, is placed.

Forming machines unload the products into separate metering devices of gear (gear) or similar type, in which the received material is weighed and / or measured with a certain level height and distribution.

Dosing devices include separate reservoirs for the product and are made with the possibility of linear movement on the working table to fill them with the product, with the possibility of moving forward to being located above the form, which is constantly in a fixed position, with certain sequences of moving forward and retracting in combination with by moving the lowering of the bottom of the form to achieve the intended purpose, as will be commented below.

The mold is formed from a fixed perimeter frame, which follows the contour of the door frame or several surfaces of the latter to obtain several door frames during one phase of molding and their subsequent separation by cutting. The height of such a perimeter frame is greater than the thickness of the door frame before the seal, in other words, it exceeds the height of the frame before the seal.

On the horizontal platform located in the lower part of the mentioned perimeter frame and made with the possibility of vertical movement with the help of several hydraulic cylinders, the first rectangular frame is made, made with it in a single unit, and the dimensions of which correspond to the dimensions of the perimeter frame opening, and made with the possibility of sliding in its inner part, like a plunger, the surfaces of which include as many holes as many door frames can be made in the form of single Yemen. The dimensions of these holes are naturally smaller than the dimensions of the door frames, although their borders are recessed relative to the borders of the latter, while these openings remain in a concentric arrangement relative to the rectangular contour and slide from the lower position, in which the product is taken from molding machines with a thickness of the uncompressed state to fill the mold, another raised position to seal the product, so that it gets a thickness corresponding to the thickness of standard doors, when hydraulically driven ECCA.

One or more second rectangular frames are provided, mutually independent, but made with the possibility of telescopic movement within each opening of the first rectangular frame and representing the surface shape remaining from the door frames, including appropriate openings if they are necessary for finishing with panel or glazing, while these second rectangular frames are also driven by hydraulic cylinders and have the same height as the first frame.

Finally, there is provided a top plate with the possibility of vertical movement, which forms a heating plate of the press, made with a hydraulic actuator to close the mold when brought into contact with a stationary perimeter frame.

When a door panel must include openings for finishing with panels or glazing, the surface occupied by them is filled with the corresponding blocks, which remain stationary on the same level (flush) with a fixed perimeter frame and are made of the same height as the frame and the same shape, that the second rectangular frames telescopically directed in its walls.

The first rectangular frames or the second rectangular frame or frames are hydraulically driven and form the lower heating plate of the press in accordance with pressing, which can be called traditional, since after compaction of the layer it is pressed between two heating plates: upper and lower.

This bottom plate has a surface shape that takes the product, with dimensions and a geometric arrangement to form the door frame or frames in accordance with several surfaces of the first, which will then be cut after removal from the mold, as described above.

In case of special use of the invention, which takes place when the door includes openings for paneling or glazing, the second rectangular frame or frames include the said openings and, since they are vertically movable, their surface must be kept constantly closed with using the appropriately fixed, aforementioned unit. If the door is solid, in other words does not contain openings for paneling or glazing, the second frame is solid and its entire surface takes layers of conglomerate and glue.

Due to the fact that the rectangular frames are made with the possibility of fuzzy movement, they can do this with different steps. The first frame is located stepwise relative to the second rectangular frame, decreasing to a greater extent to receive more product and so that when compacted in the press in this perimeter zone, a higher density is obtained, as mentioned earlier.

The upper heating plate of the press and the telescopic frame that forms its lower heating plate, on which a conglomerate of wood particles and glue is located, may also include a traditional heating system for melting urea-formaldehyde adhesives that are mixed with wood particles, in addition to including exhaust nozzles for hot air or steam, which contribute to improving the quality of the sandwich structure, as well as reduce the time of shrinkage. At the same end, the perimeter frame and fixed blocks located at the openings for paneling or glazing, also include a heating system similar to the heating system of the press's heating plates.

The upper heating plate, which throughout the process of loading the mold with different products to form the sandwich structure, remained in the raised position to ensure the input and output of the metering carts, which had previously been loaded with the corresponding product using two metering devices, then lowered to close on top of the mold. Product loading was carried out in three phases, as will be understood further with reference to the drawings, which makes it possible to form three layers of a sandwich structure. Starting from the moment when the form is closed from above, the first and second rectangular telescopic frames are raised when the lower horizontal platform rises, however, with the peculiarity that they move forward to affect the pressing, while their stepiness decreases until they reach one level, and continue their movement until its end to obtain a sandwich structure of uniform thickness, but with a higher density at the edge of each of the doors obtained by single pressing, despite the fact that then a plate is cut by means of saws, so that the different door panels separated from each other.

Mold release is easily done at the end of the shrinkage time by raising the upper heating plate, and then continuing to advance the lower platform until the pressed plate leaves the mold.

To achieve the above goals, to ensure automation and versatility in the manufacture of doors of various types and models, certain improvements are proposed for this design.

The mold has a rectangular frame or perimeter wall, in which various recesses or openings are made with the contour of the door frame to be manufactured for the simultaneous manufacture of several completely finished blocks defining a composite form, although this could also be the usual form for performing them on a unit basis. However, the previous design is much more cost-effective.

The first rectangular frame with the door contour is made with the possibility of vertical sliding in each of these independent recesses or openings. The second rectangular frame is made with the possibility of telescopic movement inside the first rectangular frame, and its internal recess, in turn, is occupied by a series of blocks that can move independently and which can have the same size or different sizes. These blocks are made with the possibility of moving simultaneously with the second rectangular frame, remaining at the same level with it, to obtain solid (massive) door frames. If any of them is held in an elevated position during the loading and compaction process of the carcass, openings will be formed for finishing with panels or glazing.

The usable area of the first rectangular frame limits the area into which the largest amount of product will be taken, and the usable area of the second rectangular frame limits the remaining area of the door, which extends to sliding blocks or plates that have not been lifted, and on which a layer of a conglomerate of particles and glue.

The rectangular frame or perimeter wall of the mold is supported by a strong perimeter structure, which includes wheels to simplify its movement along a pair of rails located on the ground, and designed to enable the removal of the entire form from its workplace on which it is located in the press, so that it can then be easily repaired and maintained. Upon its return to its original position, the unit is slightly lifted in order to remove it from the wheels for its ideal landing on rails.

Both the first rectangular frame and the second rectangular frame, together with independent intermediate plates, with which openings for finishing with panel or glazing can be made, rely on vertical rods passing through the upper horizontal support platform, driven by hydraulic cylinders, to realize pressing, as will become clear further. The lower ends of these rods rest on a movable frame of adjustable height, with which it is possible to change the loading height, since it is equipped with several wheels from below that slide in several wedges of the frame, which is made with the possibility of displacement in the horizontal direction, relying on other wheels connected to the lower part of the perimeter structure, while this movement is carried out using a rotor and a gear engaged with the rack.

The length of the support rods for the first rectangular frame is less than their length for the second rectangular frame, while the length of the latter is equal to the support rods for the plates, since they are on the same level with the last rectangular frame. Mutual stepwise arrangement of rectangular frames determines a large thickness of the load in the perimeter of the door. This difference in levels can be easily changed by placing several wedges in the supporting support for vertical rods, increasing or decreasing their number.

To provide the possibility of raising the corresponding plates to form openings for finishing with panel or glazing, all of them, in turn, rely on the rod of the corresponding hydraulic cylinder on a longitudinal metal strip, which is located in the center relative to the surface of each door. These support beams of the hydraulic cylinders are made in the respective struts, which are supported by horizontal beams fixedly fixed to the ground.

The rods of these cylinders are connected to each block or plate to allow it to be raised or lowered in accordance with the type, shape and location of the aperture or openings for panel or glazing, while these rods pass through the upper supporting platform, like the vertical rods.

The first and second frames are supported only by four rods located in the corner zones, since they must support the actual weight of only the frame and the loaded product, provided that the sealing pressure is created by the upper platform through several support plates fixed to its active surface, while they are made of the same height and facing each of the first and second rectangular frame. These support plates are also formed in connection with portions or plates forming openings for paneling or glazing. The upper pressure platform is not in direct contact with the frames and plates, instead, the support plates are arranged with the possibility of forming openings under them for cleaning and removing residues that may harden.

When lifting the upper support platform to start compaction, the first frame first rises, or rather the first frames, which include a composite form (eight in order to optimize manufacturing), until it is equal (flush mounted) with the second frame or frames, at this moment, the respective support plates come into contact with the second rectangular frames, after which they simultaneously rise. During this slight displacement of the steps, the perimetric zone of the door frame is compressed or pressed in each of the openings of the composite shape, and thereby a high density is achieved, which was desirable. Naturally, after removing the dosing devices used to load the mold, during the compaction process, the mold should remain covered by the heating plate of the press.

The plate-forming openings for paneling or glazing are held at the upper level flush with the shape of the mold, while the others constantly accompany the second, or inner rectangular, frame of the telescopic unit.

Certain improvements are seen both in the fixed part of the form and in the rising and lowering structures of the first and second frames, which are simplified to change the step of movement depending on the different thicknesses of the door frames.

Firstly, we can mention that the rectangular frame, with which several blocks are made in one pressing cycle, instead of being stationary for the manufacture of standard door frames, is divided into two parts: a fixed outer part, perimeter to each individual block, and another movable inner part, which is made with the possibility of telescopic displacement inside this block and arrangement in two positions: the upper, in which it is located flush with the outer perimeter Tew for manufacturing standard door frames, and in another lower position for manufacturing door scaffolds large length and width by dropping by an amount similar to the first rectangular frame to obtain a larger volume of material for pressing.

In addition, the outer fixed part of each independent block has longitudinal walls equipped with separate movable metal strips, which can be lowered by a larger or smaller value similar to the inner movable part for the manufacture of door frames, one third larger in width, taking also a larger amount of material loaded for pressing . These last doors are widely used as doors in hospital corridors.

Both the movable metal strips and the inner perimetric part are supported by vertical rods, which, in turn, are supported on the crossbars of the individual frames, which are independent for different mold blocks and are supported by several first hydraulic cylinders and several second hydraulic cylinders for loading product of independent movement, depending on the position occupied by the metering devices for products forming the sandwich structure.

The metal strips and the movable inner perimetric part can occupy the lowest position and, in turn, the stepped position of the first and second frames to obtain a larger product load to form frames for large doors simply using hydraulic cylinders, helping them to extend or retract a predetermined distance depending on the command received from the computer-controlled automatic unit. The filling movements (lowering) are carried out sequentially during the advancement of the metering devices, as will be understood further, since when they move to one side, the product is unloaded for two layers of the sandwich structure. When the movable frame on which the metering devices are located exits the press, then pressing is performed and, therefore, when it is returned back to the other side, the door frames are simultaneously removed as soon as the upper press plate rises and its lower cylinders extend to remove the door frame from forms.

During the reverse movement, the molds are sequentially filled in a manner similar to that described above, then they proceed to pressing and removing the door frames for a new cycle.

Another of the improvements cited, which is the essence of this invention, consists in simplifying the mechanisms of raising and lowering the first and second frames of an earlier type of execution for the manufacture of standard door frames, or which move together with the movable part of the perimeter frame in the case of making doors of greater width or height without the need to provide movable frames on wheels driven by inclined planes of the side-moved frame, as it is provided the movement of hydraulic cylinders with automatic control, in which the step is very accurate.

Another improvement considered by the invention is the new design of the metering device, which moves forward (loading all the mold elements in the press), then stops outside the press, making it possible to perform pressing, returns to the other side while filling the forms, stops on this side , providing the ability to perform pressing, and so on in this sequence.

The metering device includes a large central hopper with the product, which forms the central part of the sandwich structure, and two more smaller side hoppers containing the product for its outer layers.

At the bottom of the hoppers are rotating rollers with blades on which a conglomerate of wood particles and glue is located to fill the mold in accordance with the programmed sequence of operations. Since the central hopper contains a much larger amount of product for unloading into the mold than the side hoppers, the bottom is occupied by two conveyor belts, which advance to the center where the three vane rollers are located. In addition, two conveyors are provided at right angles to the forward movement of the belts of these product conveyor side conveyors, which helps to achieve uniform distribution in shape.

At the front and back of the transport frame for the metering devices are several double cleaning rollers. The inner rollers are positioned obliquely for better sweeping and leveling the layer being poured into the mold, as will be further understood in connection with the drawings.

For a better understanding of the characteristics of the invention and the formation of the internal part of this description, the sheets of plans are attached, on which, as an illustration, not limiting the essence of the invention, the following is presented.

Brief Description of the Drawings

Figure 1 - schematic view of the installation for the manufacture of door frames in the system, which is the object of the invention.

Figure 2 is a side view in section of the same press 1 used in the installation shown in figure 1.

Figure 3 is a schematic longitudinal sectional view of a mold in which, in one operation, several door frames are simultaneously manufactured, including a press upper heating plate in a raised position to enable mold loading, together with a lower platform connected to telescopic rectangular frames, also corresponding to the section along the section line AA of FIG. 4.

Figure 4 is a partial top view of a mold for the simultaneous manufacture of several door frames according to figure 3 with two openings of various sizes for inserting panels or glazing.

5 is a sequence of motions for filling a mold with a compression product coming from two molding machines, including the final position (d) of the upper press heating plate that closes the compression mold.

FIG. 6 is a plan view of a mold, illustrating, by way of example, various door models that can be made based on corresponding door frames formed in the mold according to the invention, corresponding to positions a, b, c, d, e, and f.

Fig.7 is a top view of various door frames corresponding to the positions a, b, c, d, e and f in Fig.6.

Fig. 8 is a partial plan view of a mold for manufacturing door frames according to the invention, prepared for manufacturing door frames of a mold corresponding to that shown.

Fig.9 is a section along the section line BB in Fig.8.

Figure 10 is a sequence of movements in four phases a), b), c), and d) for filling the mold and pressing the product to obtain the final thickness of the door frame.

11 is a view in longitudinal section of a mold according to the invention, on which, as an example, three continuous door panels are formed at the same time, located under the portal press, and the position of removing the mold from the press for repair or maintenance is shown to its right.

FIG. 12 is a larger view of the actual shape shown in FIG. 11.

Fig - top view of the upper support platform and the location of the support plates for the first and second rectangular frames together with plates or blocks, providing the formation of openings for finishing panels or glazing.

Fig. 14 is an enlarged view of part C shown in Fig. 13.

Fig. 15 is a cross-sectional view of the same shape shown in Fig. 11 located under the gantry press.

Fig.16 is a view of a larger size of the actual form shown in Fig.15.

Fig is a partial cross-sectional view of a portal press for the manufacture of door frames, which contains some improvements that are the object of the present invention, prepared to obtain in this case, solid door frames larger in height and width than standard door frames.

Fig. 18 is a partial longitudinal sectional view of the same shape shown in Fig. 17, corresponding to the D-D section shown in Fig. 17 and the specific case of simultaneously manufacturing four door frames.

Fig.19 is a sectional top view of what is shown in Fig.18, and corresponding to the depicted in Fig.18 section along the line EE.

Fig. 20 is a plan view of the same shape as in Fig. 18.

Fig.21 is a top view of the entire movable part of the mold block, that is, all elements inside the contour of the outer stationary perimeter part of each individual block.

Fig. 22 is a partial cross-sectional view of a mold for four blocks of its fixed part.

Fig is a partial view in longitudinal section of the same form shown in Fig.22.

24 is a partial longitudinal sectional view of the same shape illustrating a heating and cooling system.

Fig. 25 is a partial longitudinal sectional view similar to that shown in Fig. 18, however, the internal structure of the mold is more simplified in accordance with the third embodiment of the present invention, in other words, not including movable frames with inclined surfaces for raising or lowering, since hydraulic cylinders only.

FIG. 26 is a sectional cross-sectional view similar to that of FIG. 5, but also excluding movable frames with inclined surfaces, as indicated for the previous figure.

Fig. 27 is a partial longitudinal sectional view of the transport cage of metering device for filling molds that slide along its upper part, as shown in Fig. 25.

Fig. 28 is a plan view below the view illustrated in Fig. 17.

Fig.29 is a top view of the view illustrated in Fig.27.

Fig. 30 is a side cross-sectional view of the view illustrated in Fig. 29.

Detailed Description of a Preferred Embodiment

With reference to the numbering adopted for figures 1-5, and especially with respect to figure 1, presents a form for the manufacture of door frames according to the invention, starting with the use of two molding machines 1 and 2, in which there is a conglomerate of wood particles and glue , in accordance with two densities and particle sizes mixed with urea-formaldehyde adhesives. In the forming machine 1, there is a component of a higher density, which will occupy the outer layers of the sandwich structure of the slab for the door frame, and in the forming machine 2 there is a component of a lower density, which will remain in the central part of the plate.

The forming machines 1 and 2 are located at fixed points, and the loading of the corresponding metering devices 3 and 4 is carried out by shifting the latter, as they can move forward on the desktop. Both metering devices 3 and 4 are linearly connected and can be placed inside the press 6 on the form to be filled, first with a portion of the product supplied by the metering device 3, then it takes the contents of the metering device 4 and finally the remainder of the product of the metering device 3 is unloaded, forming thus a sandwich structure, while these movements are consistent with the programmed lowerings of the movable base of the form.

Press 6 includes an upper heating plate 7, made with the possibility of vertical movement by means of hydraulic cylinders 8, closing the mold 9, which sequentially receives the product from the metering devices 3 and 4.

In Fig.2 illustrates a side view of the press 6 with the upper heating plate 7 located at a distance from the mold 2, as shown in Fig.1.

Form 9 is schematically represented in FIG. 3 in section and in plan view in FIG. 4. The outer frame 10 is fixed and defines the walls of the mold 9 (see figure 4). In its inner perimeter, the first rectangular frame 11 slides, which exactly repeats its contour, and can slide like a plunger in it. It has the same surface as the doors to be molded (at least three of them are shown in Fig. 4, since this is a partial top view), and is a surface with openings 12 in an amount corresponding to the number of door frames formed. The connection line of two adjacent doors is shown by dash-dotted lines 13, which later, at the end of the process, will become the cutting lines of the slab to separate the different door frames formed during one pressing.

The corresponding rectangular frame 14, sliding in each hole 12, has openings 15 and 16 for finishing with panels or glazing, which in the example of the shown embodiment have different sizes.

The first rectangular frame 11 is defined by the crossbars 17, the end cross members 18 (the left of which is visible in FIG. 4) and the central cross members 19, while the latter are made in double size, as will be seen immediately below, they must ensure that the end strips of the following one after another, door frames, which they limit, remained sealed in the same way as in the areas around the perimeter.

All these parts of the rolling frame 11 are clearly visible in figure 3.

Each of the second frames 14 has several sections located in the transverse direction, parallel and sliding in the designated positions 18 and 19 of the sections of the first rectangular frame 11, indicated in this case by the position 20.

Reference numerals 21 and 22 denote fixed blocks occupying the positions of the openings 15 and 16 for finishing with panels or glazing.

The rectangular frame 11 is made in a single unit with the lower platform 23.

With such a structure and with special reference to FIG. 5, which illustrates the various successive phases of the manufacture of this product, the filling of the mold and the final pressing are carried out as follows. The measured and weighed product supplied from the first forming machine 1 passes to the metering device 3 and from it into the mold 9, when the rectangular frames 11 and 14 are at the same level (in Fig. 5 only the corresponding sections 18 and 20 are visible in different positions or phases ), and is removed relative to the edge of the peripheral frame 10.

The enlarged part shown in FIG. 1 shows the construction of a gear metering device made very accurate, since half of the product contained in the metering device 1 must be unloaded. The first layer poured into the mold corresponds to the lower layer of the sandwich structure and is indicated in position a ) at 24.

After this, the metering device 3 performs lateral displacement to the right in figure 1, and the metering device 4 in the unloading position in the mold 9 remains inextricable and made with it in a single unit. With this displacement, sweeping or leveling of the mold occurs simultaneously so that the bottom layer 24 becomes homogeneous and the mold surface remains clean.

Then, as soon as both rectangular frames 11 and 14 lowered and took position b), as shown in Fig. 5, the second dosing device 4 is completely unloaded with a denser product or the central part of the sandwich structure (only the transverse sections of the frames are visible in these figures corresponding to reference numbers 18 and 20, respectively). This movement is achieved by controlling the hydraulic cylinders to a predetermined level, which command the displacement of the telescopic rectangular frame 14 located on the lower platform 23. Due to the stepped arrangement in this unloading position and the fact that the rectangular frame corresponding to section 18 has passed a greater distance than the section 20 of the rectangular frame 14, a larger amount of material enters the outer portion of the mold. This intermediate layer distributed in this way is denoted by 25.

Then, the first metering device 3 is returned for re-positioning above the mold 9 simultaneously with its sweeping and leveling, and both telescopic frames 11 and 14 (sections 18 and 20, respectively) are simultaneously lowered in accordance with the lowering step corresponding to the thickness of the remaining outer layer of the sandwich structure , with unloading the smaller product to fill the mold according to the layer indicated by 26 at position c), as shown in FIG. As can be clearly seen, the central layer 25 in the left zone, as required, is thicker than in the right zone, so that upon completion of compaction, the density of the outer section may be greater than the density of the central zone. On the outer sections of the openings 15 and 16 for paneling or glazing, there is no need for a higher density, as forms for installing panels or glass will be located here.

As soon as the mold 9 is filled, the metering devices 3 and 4 return to their original position outside the mold 9 to ensure that the upper heating plate 7 is lowered until it comes into contact with it, which corresponds to position d) in FIG.

Finally, when the lower platform 23 rises to a height corresponding to the final thickness of the door frame, the two rectangular frames 11 and 14 are located at the same level (flush) and continue to rise in this way until they reach position d) shown in FIG. 5 .

As is clear from FIG. 5, upon completion of the shrinkage time, the upper heating plate 7 rises and the mold opens, while the lower platform 23 continues to rise. When the compressed plate leaves the mold, it is removed to perform a new cycle.

In this position d), shown in FIG. 5, the outer part of the middle layer 25 of the sandwich structure, which has received a larger amount of product and is more densely compacted to the desired value, is indicated by 27.

Referring to FIGS. 6-16, certain improvements to the mold for manufacturing door frames according to another embodiment of the invention can be seen. As shown in Fig.6, the production of door frames is provided, which are both solid 28a (position a) and with one or more openings for paneling or glazing, simply by quickly acting on certain elements of its structure, depending on location, quantity and / or distribution of these openings. In position b), a door 28b is shown with one rectangular aperture 29a. In position c), a door 28c with two openings 29, 29c with straight or curved slats or plates 30 is shown, with straight parts indicated by 30a and curved parts by 30b. In position d), a door 28d is shown with three openings 29c, which combine straight plates 30a with curved plates 30b, and in position e), a door 28d is shown with three openings 29c with only straight plates 30a. Finally, in position f), a door 28f with four openings 29d is shown, with the lower one having a higher height than the others. To simplify the designation of these elements of the door, openings and lining will be respectively denoted by the reference numbers 29 (door), 29 (openings), 30 (lining), even though they may be geometrically different.

Fig. 7 shows various door frames corresponding to those shown in Fig. 6 (positions c, d, e and f) of the doors, which should be simply laminated, machined at the edges and equipped with straight or curved slats 30, indicated by 31c, 31d, 31e and 31f, respectively, and in general they are indicated here by 31.

For example, it can be seen that the door frame 31d and the door frame 31e have three openings of different heights, since the first must be machined at horizontal borders, which must be equipped with curved slats.

The door 28a shown in FIG. 6 would correspond to the door frame 31a not shown in FIG. 7, and which we will call solid, in other words, without openings for paneling or glazing.

Figs. 8 and 9 partially show a top view of a mold for manufacturing door frames in accordance with a second embodiment of the invention defined by a rigid frame 32 that is fixed and defines an inlet of the mold for simultaneously manufacturing three, in this case, door frames 31 having three corresponding holes 33, which have the contour and dimensions of the “door frames” 31 to be manufactured (all shown and those that can be made in this form have the same standard dimensions for ntur).

The inserts in these holes 33 are respectively the first independent rectangular frames 34 or the outer frames 34 of the telescopic unit, which are made integrally with the internal rectangular frames or the second rectangular frames 35, while both of them are made with the possibility of independent and various movements at certain phases loading and pressing the product, as will be seen in the future, mainly in connection with figure 10.

The inner surface of the second rectangular frame 35 is occupied by transverse plates or blocks arranged in groups, some of a small size (indicated by reference numeral 36), others, indicated by reference numeral 37, of medium size, and still larger than others, of a size indicated by reference numeral 38.

These plates 36, 37 and 38 are driven by respective hydraulic cylinders 39, 40 and 41 of proportional sizes, each of which rests on the transverse bars 42, which repeat the middle lines of the holes 33. In Fig. 8, the rods of these cylinders are connected to the recesses 43 of the base of the respective plates (Fig. 12).

Figure 10 illustrates the various successive phases of the manufacture of door frames: filling the form and the final pressing, which is performed as follows.

The measured and weighed product supplied from the first forming machine passes to and from the dosing device when the rectangular frames 34 and 35 are located at the same level with respect to the border of the perimeter frame 32 or the mold inlet.

For unloading, a gear metering device is used, the design of which is very accurate, since half of the product contained in the metering device must be unloaded. This moldable layer corresponds to the lower layer of the sandwich structure and is indicated by 44 in position a).

Then there is a lateral displacement of the first metering device, while the second metering device (fixed in the adjoining position) remains in the unloading position above the mold. With this displacement, sweeping or leveling of the mold occurs simultaneously so that the bottom layer 44 becomes uniform and the mold surface remains clean. Then, as soon as both rectangular frames 34 and 35 have lowered and occupied position b) shown in Fig. 10, the second dosing device with the denser product or the central product of the sandwich structure is completely unloaded (only the transverse sections of the rectangular frames are visible in these figures). This is achieved by controlling hydraulic cylinders to a predetermined level, which are given the command to displace the telescopic rectangular frames 14 located at the bottom, as will be understood later. Due to the stepwise arrangement in this unloading position and the fact that the rectangular layer 34 has traveled a greater distance than the rectangular layer 35, a larger amount of material enters the outer portion of the mold. This intermediate layer distributed in this way is indicated by the reference numeral 45 in FIG. 10.

Then, the first dispensing device returns for re-positioning over the form, simultaneously sweeping and leveling, and both telescopic frames 34 and 35 are simultaneously lowered in accordance with the lowering step to obtain the remaining outer layer of the sandwich structure (position c) with a smaller product before filling the mold according to the top layer indicated by reference numeral 26 in position c) of FIG. 10. As can be clearly seen, the intermediate layer 45, as required, is thicker in the outer portion, so that upon completion of compaction (position d), the density of the outer zone will be greater than the density of the central zone. Side sealing relative to the fixed frame 32 means that the edge of the frame has a higher density. On the outer sections of the openings for paneling or glazing, there is no need for greater density, since it is here that forms for installing panels or glass will be located.

Before performing the seal, the metering devices return to their original position outside the mold to ensure that the upper heating plate 47 (most clearly visible in FIG. 11) is lowered before being brought into contact with it, which corresponds to position d) in FIG. 10. When the compaction begins, two rectangular frames 34 and 35, which are arranged in steps, begin to tend to be at the same level and continue to rise in this way until they reach position d) shown in FIG. 10 at a height corresponding to the final thickness of the door frame . At the end of the setting time, the upper heating plate 47 rises and the mold is released, as the lower cylinders continue to hydraulically extend. When the compressed plate leaves the mold, it is removed to start a new cycle.

In position d) shown in FIG. 10, reference numeral 45 denotes the outer part of the intermediate layer 45 of the sandwich structure, which has received more product and is more densely sealed.

Figures 11 and 15 and larger in figures 12 and 16 show that the plates 36, 37, 38 are on the same level with the second frame 35 and move together, as will be understood later. In this case, a continuous door frame 28 is formed, since the product coming from the metering devices would fill the entire surface of the form shown in Fig. 12 (in three openings 33).

The supporting structure of the frames and their displacement is the following structure.

The fixed frame 32, made with holes 33 or loading product inlets, is supported on the outer wall 49. The first rectangular frame 34 of each hole is supported by several vertical rods 50, and the second rectangular frames are supported by several vertical rods 51 of a greater length to maintain a position in the form steps, which allows a large load. The height of this step can be advantageously varied by setting more or less wedges at the base of the vertical rods. In turn, all the vertical rods are supported by a carcass 52 of the wheels 53, which are able to advance on an inclined surface 54 fixed at the top of the movable carcass 55, which is capable of doing this due to the support on the wheels 56. These wheels 56 are mounted on supports 57, fixedly mounted on the longitudinal the walls 49 of the support for the fixed frame 32 (see Fig.16).

12, a gear 58 can be seen which engages with a gear rack 59 integral with the movable frame 55 bearing the inclined planes 54. When the drive motor 60 rotates (see the right part of FIG. 6), the wheels 53 are movable the frame is moved by means of the inclined surfaces 54 and the frame 52 rises. Thus, a predetermined height difference is provided between the rectangular frames 34 and 35 and the movable plates 36, which do not occupy the position of the openings for paneling or glazing, which determines the means for adjusting the final thickness of the door frame 28 to be manufactured with different standard sizes.

After the position of the inclined planes 54 is established, they are driven by hydraulic cylinders 61 of the press: they are lowered to load the product and lifted for compaction. The cylinders 61 act on the lower metal strips 62 through the struts 63, thereby pressing the upper platform 64, which is equipped with thrust plates 65 and 66, acting directly on the first and second frames. Thus, openings are formed under them to ensure proper cleaning to be performed.

The upper platform 64 is equipped with holes 67 and 68 for the passage of all the rods 50 and 51, which supports a rectangular first, or external, frame 34 and a second, or internal rectangular, frame 35, respectively. Vertical rods 50 are located only in the corner zones, since they should only support the weight of the frame and the product loaded into it, consisting of a conglomerate of wood particles and glue. Vertical support rods 51 for each second rectangular frame 35 are also located in the corner zones for the same reason.

Small hydraulic cylinders 39, 40 and 41, which raise the plates (36, 37, 38) to form passages, also pass through holes made in accordance with the upper platform 64.

The transverse metal strips 42, on which all cylinders 39, 40 and 41 are supported, are supported by other rods 69, which start from horizontal tubular beams 70, supported by the ground.

As the first and second rectangular frames 34 and 35 rest on the rods 50 and 51, all the plates 36, 37 and 38 are capable of forming openings for finishing with panel or glazing (holes are not shown in FIG. 15, since solid doors are formed), based on pairs of rods 71 or double pairs 72 (depending on size), which also pass through holes in the upper support platform 64 and which are supported below on the same frame 52 of wheels 53, as the rods 50 and 51 did, supporting the weight of the plates and lying on them boot, as described earlier, since benching forces are created only support plates 65 (for the first rectangular framework 34), support plates 66 (for the second rectangular framework 35) and through the support plates 73, which may be single or double likewise depending on the size. Their distribution is shown in FIGS. 13 and 14 for plates 36, 37 and 38 forming openings for paneling or glazing.

Reference numeral 74 denotes the rails on which the mold is supported by wheels 75 mounted on supports 76 attached to the longitudinal walls to support the fixed frame 32. When a repair or maintenance operation is necessary, the wheels are installed by slightly raising the entire unit with the lower lifting cylinders 61, making it possible to remove the entire block from the rails 74. When the mold is returned to its place in the press, these wheels 75 are removed.

The first and second frames 34 and 35, together with the plates 36, 37 and 38, forming openings for finishing panels or glazing, are equipped with a heating system similar to the heating plate 47 of the press, since they themselves form the lower heating plate.

With reference to FIGS. 17-30, it is obvious that the door frames can be made in a standard size, as well as other door frames with special sizes: with a longer length and width, and other types of doors of a larger size with a larger width than the previous ones.

These plates 36, 37 and 38 are driven by respective hydraulic cylinders 39, 40 and 41, which are supported by fixed transverse beams, which follow the middle lines of the holes 33 and which, in the case of FIGS. 17-30, are supported by the lower plates 42 (FIG. .eighteen).

The first rectangular frame 34 of each hole 33 rests on the vertical rods 50, and the second rectangular frames 35 rest on the vertical rods 51 of a greater length to hold the position in the form of steps, which allows for a large load. Instead of changing the height of this step by inserting more or less gaskets into the base of the vertical rods, as described in the description of the previous embodiment of the invention (Figs. 6-16), as will be understood later, differences in height are achieved only by controlling the extension and by hydraulic cylinders, which is carried out using a computer and in an absolutely accurate way.

In addition, FIG. 18 shows a gear 58 that engages with an external gear rack 59 attached to the movable frame 55. FIG. 19 shows two gear racks 59, one on each side, for greater stability of operation, which include the gears 58 inserted into the output shaft of the drive motor 60 are engaged. When the engine is rotated, the wheels 53 of the movable frame 52 are biased by the inclined planes 54 and the frame 52 rises.

Cylinders 39, 40 and 41, distributed in pairs, which are mutually identical in this case, are supported on the lower transverse metal strips 42, since when the block to be lifted is larger, it is lifted by two pairs, as shown in Fig. 17. Reference numeral 39 denotes cylinders corresponding to smaller plates or transverse portions, position 40 denotes intermediate sized plates, and reference 41 denotes cylinders used to support large plates. Another solution is to use a pair of cylinders 40 and reinforce the support rods, as will be seen later.

Cylinders 39, 40 and 41 act directly on metal strips or tubular beams 70 common to four simultaneously operating units. A plurality of fixing plates 69 'are attached to these metal strips 70 for pairs of rods 71 or double pairs 72 (depending on size), which also pass through an opening in the upper support platform 64 and which, in the case shown in FIG. frame 52 wheels 53, as did the rods 50 and 51.

Thus, starting from this design, the present invention is directed to certain improvements in the so-called fixed frame 32 or mold walls, making it possible to obtain standard doors (they are obtained using components that are already explained in the description section of the preferred embodiment of the invention) along with others doors of greater length and height, as well as doors of even larger size relative to large doors and which are used as doors in hospital corridors, which was remember the above.

To achieve this, a fixed frame 32 is proposed (its part is schematically represented in Figs. 9, 10 by a square) made using the perimetric outer part 77 and another movable inside part 78, also perimetric, as explained at the beginning of this description.

Elements 77 and 78 are presented in a top view in FIG. 20 and in a section in FIGS. 17 and 18.

Reference numeral 79 denotes metal strips that are located on the rear side of each independent unit and which can also be omitted in special cases of manufacturing larger doors, as mentioned above and as will be seen from the following description.

On Fig you can see the profile of two metal strips 79 (one on each side of the mold block), and on Fig visible bottom. Both are connected to first vertical rods 80 driven by a pair of first hydraulic cylinders 81 (see FIG. 25).

In addition, the movable perimeter inner part 78 is connected to some second vertical rods 82, which are raised or lowered by means of the second hydraulic cylinders 83.

The present invention also provides that the first and second frames (indicated by 34 and 35, respectively) can be actuated using high-precision hydraulic cylinders 84 and 85, similar to the cylinders used for the metal strips 79 and the movable perimeter portion 78, also computer-controlled for positioning at desired exact heights. In this case, there is no need for a movable carcass 52 with wheels 53 driven by the inclined surfaces 54 of the carcass 55, since the simultaneous arrangement is achieved by digital program control, which at the appropriate time issues a command to precisely extend or retract the cylinders, thereby greatly simplifying construction.

Moreover, hydraulic cylinders 39, 40 and 41 for lifting plates or transverse sections 36, 37 and 38, which will form openings for finishing with panel or glazing, if any, rely on pairs of rods 71 or double pairs 72, supported on cross members 86 T-shaped supports 87 on which the lifting hydraulic cylinders 39 are fixed (all the same and supported in the same way as the cylinders 81 and 83 for guiding the metal strips 79 and the movable peripheral part 78), as well as the lifting and lowering rods 50, 51 for the first and second frames 34 and 35.

In the manufacture of large door frames, the axial pressure of the lower press cylinders is transmitted to the inner perimetric part 78 and / or to the metal strips 79 through the upper platform 64, on which other supporting plates are located, indicated by the reference numbers 65 'and 66', which have a lower height, than the support plates 65 and 66, which press on the first and second frames, since the latter have a lower height than the first (metal strips 79 and the inner perimeter portion 78).

In addition, dosing devices are used to fill the forms, which are the structures shown in Figs. 27-30 defined by a large central hopper 88 and two other side hoppers 89, which are loaded with the material of the central layer of the sandwich structure and its outer layers, respectively, while the entire block is mounted on a sliding frame or bodies 90 with wheels 91, which circulate along the paths 92 in the longitudinal upper part of all the blocks of the form (Fig.26).

The product contained in the bins 88 and 89 is produced in the form by means of rotating rollers 93 with blades, three of which are located in the central bunker 88 and one each in the side bins. The central hopper 88 is equipped with two conveyor shelves 94, which move the material to the press on the paddle rollers 93. The material is distributed and also protected from the formation of lumps using two scraper conveyors 95 (see Fig. 30), which move in the direction transverse to the conveyor tapes 94. Reference numeral 96 denotes several deflection sheets to create a flow or direct product to exit hoppers 88 and 89.

As can be clearly seen in FIG. 27, the sliding frame 90 of the metering devices includes two cleaning rollers 97 and 98, at its ends in its front and rear parts. The inner cleaning rollers 98 are inclined to better distribute and level the cast layer. The outer cleaning rollers 97 are longer and even out the horizontal surface that will be brought into contact with the upper press heating plate 47, preventing the formation of unwanted crusts.

The movable frame 90 includes several front pushers 99 that remove the door frames 28 after pressing and are raised above the mold inlet under the influence of the lower press cylinders 61. At the same time, when they are removed, other blocks of the mold are loaded in accordance with the sequence of movements along with the action of the cylinders, which control the receipt of the product, as seen below.

Assume that in FIG. 25, the sliding frame 90 with loading bins 88 and 89 is located on the left (without being inserted into the mold) and the pressing in this case of the four door frames is completed and the upper plate 47 is removed from the press by raising the lower cylinders 61 of the press, emptying the mold done. At this moment, when the carriage of the carcass 90 moves to the right, the door frames 28 are retracted by the pusher 99 to the right. At the same time, the product is unloaded for the lower layer of the sandwich structure using the hopper 89 above the first block of the composite form. Then this block is filled with the material of the hopper 88 after lowering the frames and metal strips (as it could be) to inlet the middle layer of the sandwich structure, while the second block is filled with its lower layer. In the subsequent phase of advancement, the cylinders are lowered so that the top layer of the first mold block can be filled with product from the hopper 89 to the left of the carriage or frame 90; the second and third blocks are filled with an intermediate layer; the fourth block is filled with the lower layer of the sandwich structure of the material from the first hopper 89. Thus, the necessary filling of all blocks occurs. When the sliding frame 90 comes out of the mold and is located to the right of it, the upper heating plate of the press is lowered and pressing is carried out. During the reverse movement of the carriage (which is not such, since it is an active movement), various blocks of the mold are filled in the same way as described above, however, in the reverse order, and the pressed plates are simultaneously removed, and so on in accordance with the sequence of operations.

21 and 24 show heating circuits for metal strips 79, the inner perimeter portion 78, the first and second rectangular frames 34 and 35, and plates or transverse sections (36, 37, 38) for melting adhesives that are mixed with a conglomerate of wood particles. Thanks to the falling and rising movements, the inlet channels 100 are rigid and vertical, so that they can simply pass through the holes 101 in the support platform 64, and then continue in the flexible sections 102. Other channels, for example, indicated by the reference numeral 103, also correspond to heating systems by steam or hot air for the transverse parts or plates (36, 37, 38) to form openings for paneling or glazing.

The outer fixed perimeter portion 77 of the rectangular frame 32 defines a closed frame that is separated from the outer wall 49 for support by means of an insulating thin plate 104.

If it is necessary to repair or clean the mold, there are means to lift the entire mold and install several wheels on it for placement on rails 74, thereby providing the ability to remove it from the press, as was discussed in the previous embodiment of the invention. In this case, several lower latches 105 are provided for lifting the supports 106 by virtue of their connection with the lower rods 107, bringing into contact by raising the lower cylinders 61 of the press over a large distance, as becomes clear from the consideration of Fig.26.

Claims (28)

1. A mold for the manufacture of door frames, especially when it is necessary to provide openings for finishing with panels or inserting glass, and conglomerate particles of wood and glue with different layers forming a sandwich structure, the outer layers of which are made of smaller particles and with a larger density with respect to the inner layer, which is thicker and made of larger particles, while the material is fed from the respective forming machines to fill the mold and then compressed between the heating press plates,
characterized in that it is defined:
- a stationary perimeter frame (10, 32), which repeats the contour of the door frame or several of its surfaces to simultaneously obtain several door frames and their subsequent separation by cutting, while the height of the perimeter frame (10, 32) is greater than the thickness of the door frame before sealing,
- a lower horizontal platform (23, 64), made with the possibility of vertical movement and hydraulically driven, on which the first rectangular frame (11, 34), made with it for a single unit, is supported, the dimensions of which correspond to the dimensions of the perimeter frame opening (10, 32 ), and which is made with the possibility of sliding in its inner part like a plunger,
- the first rectangular frame (11, 34), the surface of which includes as many holes (12, 39), how many door frames can be obtained simultaneously, of a smaller size and in a concentric position relative to them, with an offset from the lower position in which it takes a product from molding machines (1, 2) with non-densified thickness for filling the mold (9) to a raised position for sealing the product, so that it receives a thickness corresponding to the thickness of standard doors with a hydraulic drive;
- one or more independent second rectangular frames (14, 35) made with the possibility of telescopic movement inside each hole (12, 39) of the first rectangular frame (11, 34) and representing the remaining surface of the door frame with its corresponding openings (15, 16) if they are necessary for finishing with panels or glazing, while they are driven by hydraulic cylinders and have the same height as the first rectangular frame (11, 34),
- the upper plate (7, 47), made with the possibility of vertical movement, which forms the heating plate of the press (6), and which is also driven by a hydraulic actuator to close the mold (9) when brought into contact with a stationary peripheral frame (10, 32 ) 2. The mold for the manufacture of door frames according to claim 1, characterized in that
the first rectangular frame (11, 34) and the second rectangular frame (14, 35) or the second rectangular frames (14, 35) are telescopic and form the lower heating plate of the press (6) in the final pressing operation. 3. A mold for the manufacture of door frames according to claim 1, characterized in that the opening or openings (15, 16) of the door frame for finishing with panel or glazing are made using the corresponding blocks or plates (21, 22, 36, 37, 38), which remain motionless in a flush position with a fixed perimeter frame (10, 32), at the same height with it and telescopically directed on its walls and are the second rectangular frames (14, 35). 4. A mold for the manufacture of door frames according to claim 1, characterized in that the product supplied from the forming machines (1, 2), measured and / or properly weighed, enters the corresponding prismatic rectangular frames, the bases of which cover the surface of the form (9) , and which belong to separate metering devices (3, 4) with gears or similar devices, which are located on the work table (5), formed integrally with each other and made with the possibility of linear displacement under the molding Ashina (1,2) for filling a corresponding product with a specific feature consists in that during their movement they have the possibility of arranging between the mold (9) and the upper heating plate (7, 47) according to a predetermined motion sequence. 5. A mold for manufacturing door frames according to claim 1, characterized in that the upper heating plate (7, 47) of the press (6) and telescopic rectangular frames (11, 14, 34, 35), which form its lower heating plate, on which contains a conglomerate of wood and glue particles, also includes several exhaust nozzles for hot air or steam, as well as a heating system for melting urea-formaldehyde adhesives. 6. A mold for the manufacture of door frames according to claim 1, characterized in that the perimeter frame (10, 32) and blocks (21, 22, 36, 37, 38) located in the places of the openings (15, 16) for finishing with panels glazing includes a heating system similar to the heating system of the heating plates (7, 47, 11, 14, 34.35) of the press (6). 7. A mold for manufacturing door frames according to claim 1, characterized in that the rectangular frame (32) or the perimeter wall has an internal recess or hole (33), the size of which corresponds to the door frame to be manufactured, or several independent recesses or holes (33) for the simultaneous manufacture of several blocks in one pressing phase, in each of which the first rectangular frame (34) slides, the useful area of which limits the zone into which the largest amount of product enters, and the second rectangular The frame (35) is movable inside the first frame, and the sliding block is movable inside the second frame (35), which is formed from a number of sections or plates (36, 37, 38) of the same size or different sizes, with the possibility of independent movement. 8. A mold for manufacturing door frames according to claim 7, characterized in that the rectangular frame (32) or the perimeter wall of the mold rests on a peripheral structure (49) equipped with wheels (75) that slide along the rails. 9. A mold for manufacturing door frames according to claim 7, characterized in that the first rectangular frame (34) is supported by a series of vertical rods (50) attached to a movable frame (52) of adjustable height and which pass through the upper support platform (64 ), driven by hydraulic cylinders (61), which act on some lower metal strips (62) by means of intermediate support posts (63). 10. A mold for the manufacture of door frames according to claim 9, characterized in that the second rectangular frame (35) is supported by another row of vertical rods (51), similarly attached to a movable frame (52) of adjustable height, and which pass through the upper support platform (64), the length of which is greater than the length of the vertical rods (50) to support the first rectangular frame (34) to set the difference in the height of the load. 11. The mold for the manufacture of door frames according to claim 10, characterized in that the difference in the height of the load is adjustable to change the density of the seal in this perimeter zone of the door frame. 12. A mold for manufacturing door frames according to claim 11, characterized in that said adjustment is performed by means of wedges provided in the base of the vertical rods (50, 51). 13. A mold for the manufacture of door frames according to claim 10, characterized in that the parts of the block sliding inside the second rectangular frame (35) are transverse sections in the form of independent plates (36, 37, 38), each of which is supported by vertical rods (71, 72), which are similarly mounted on a movable frame (52) of adjustable height and which pass through the upper support platform (64), the length of which is equal to the length of the vertical rods (51) to support the second rectangular frame (35) for installation on that same height and location zheniya flush with the last,
in this case, each transverse section or independent plate (36, 37, 38) is supported by a corresponding vertical cylinder (39, 40, 41) of independent actuation, whose bodies are supported by beams (42), providing general support, and whose rods intersect the upper supporting a platform (64) and attached to the base of their respective independent plates (36, 37, 38),
at the same time, these rods (42) are supported on supporting posts (69) in a fixed mold support and are configured to hold raised independent bands (36, 37, 38) selected to be flush with the mold inlet and held during the loading phase and pressing to form an aperture (29) or apertures (29), if provided, for finishing with panels or glazing with a predetermined location and size. 14. A mold for the manufacture of door frames according to claim 7, characterized in that the pressing of the resulting three-layer product is carried out using the lifting action of the hydraulic cylinders (61) associated with the lower metal strips (62), while on the upper supporting platform (64) are several support plates (65, 66, 73) of equal height and located in a position facing the first (34) and second (35) frames and independent plates (36, 37, 38). 15. A mold for the manufacture of door frames according to claim 13, characterized in that the movable frame (52) of adjustable height, from which all vertical rods (50, 51, 71, 72) extend, includes several wheels located below them (53 ), which are supported by the corresponding inclined planes (54) provided on the movable frame (55), which, in turn, is supported by several wheels (56) attached to the supports (57), mounted on the lower part of the perimeter structure (49) supports for a fixed frame (32) of a form, and whose rods are equipped with an attachment the portion of the gear rack connected thereto, which is connected to the corresponding gear (58), driven by the engine (60) to slide the movable frame (55) to one side or the other side, and thereby change the distance for intake and sealing product. 16. A mold for the manufacture of door frames according to claim 1, characterized in that the rectangular frame (32) with a greater height than the first (34) and second (35) rectangular frames, consists of an outer fixed part (77), perimeter relative to each an independent unit, and another movable, also perimetric, inner part (78) and is arranged to be located in two positions: the upper, in which it is flush with the perimetric outer part (77) for the manufacture of standard door frames, and in another lower position A manufacturing door frames, of large length and width, when it is lowered over the same distance as the first rectangular framework (34) to obtain a greater volume of material to press. 17. A mold for the manufacture of door frames according to claim 16, characterized in that the perimetric outer stationary part (77) of each independent unit has its longitudinal walls covered with separate movable metal strips (79), which can be lowered by a greater or equal value in compared with the movable inner part (78) for the manufacture of door frames, which are one third larger in width, and the acceptance of more material loaded for pressing. 18. A mold for the manufacture of door frames according to claim 17, characterized in that each of the movable metal strips (79) is supported by two vertical rods (80), which, in turn, are supported by the cross members of the frame, common to all blocks and supported on the first hydraulic cylinders (81) fixedly mounted on the base plate (42). 19. A mold for the manufacture of door frames according to claim 18, characterized in that the movable inner part (78) of each individual block is supported by other vertical rods (82), which, in turn, are supported by the cross members of the frame common to all blocks and based on the second hydraulic cylinders (83) mounted on the base plate (42). 20. A mold for the manufacture of door frames according to claim 19, characterized in that the vertical rods (80) for supporting the metal strips (79) and the rods of the movable inner part (78) pass through the support platform (64), driven by hydraulic cylinders ( 61) a press, and on which support plates (65, 66) of the first or inner frame (34), as well as a second or external frame (35) can be located, while other supporting plates (65 ', 66') are additionally provided height corresponding to a greater height of metal over axes (79) and moveable inner part (78) of the rectangular frame (32), which press on them when they are in the low position for filling product. 21. A mold for the manufacture of door frames according to claim 16, characterized in that sections or plates (36, 37, 38) of the same or different size for forming openings for finishing with panel or glazing in the required places of each block are based on pairs of vertical rods ( 71), which cross the support platform (64) and rest on the crossbars (86) independently of the various blocks to which the lifting cylinders (39) are connected, which are supported on the support plate (42). 22. A mold for the manufacture of door frames according to claim 16, characterized in that the outer part (77) or part larger than the rectangular frame (34), dimensions or the perimeter wall of the form creates a closed frame, which is separated from the peripheral supporting walls (49) for a rectangular frame (34) of the shape by means of an insulating thin plate (104). 23. A mold for the manufacture of door frames according to claim 16, characterized in that all movable elements on which the product can be located include circulation loops for the heating fluid, the channels (100, 103) of which freely pass through the holes (101) provided in the support platform (64). 24. A mold for manufacturing door frames according to claim 16, characterized in that the lifting of the press cylinders (61) is greater than the working distance leading to the lifting of the mold using several lower latches (105) connected to the lower press cylinders (61) that lead her to the compartment with respect to her support on the rails (74), allowing you to install several wheels for its removal from the press for its repair and maintenance. 25. A mold for manufacturing door frames according to claim 16, characterized in that loading bunkers (88, 89) with two types of sandwich structure material are mounted on the sliding frame (90), while the outer or side bins (89) contain the product type for the outer layers of the sandwich structure, while the product for its central layer is located in the central hopper (88) of a larger size than the side hoppers (89), while this product is unloaded into the form using rotating rollers (93) with vanes, wherein the rollers (93) are located in the lower hour These loading bins (88, 89), as well as two cleaning rollers (97, 98) are provided on the front and rear parts of the sliding frame (90). 26. A mold for manufacturing door frames according to claim 25, characterized in that the cleaning rollers (97, 98) are double, the inner ones are inclined and have a shorter length for better sweeping and leveling the layer of the cast product, and the outer cleaning rollers (97 ) are made longer to clean the support or surface for perimetric contact with the upper heating plate (47) of the press. 27. A mold for the manufacture of door frames according to claim 25, characterized in that there are three rotating rollers (93) of the central hopper (88): the central and two outer ones that distribute the product of the middle layer of the sandwich structure, which lies on them, moved laterally conveyor belts (94), which move longitudinally to the center, and the upper device for even distribution. 28. A mold for the manufacture of door frames according to claim 27, characterized in that the upper uniform distribution device includes two scraper conveyors (95) that move in the transverse direction.

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