DE1684011A1 - Mold for making objects from asbestos cement - Google Patents

Description

The invention relates to a mold for making objects from asbestos cement of circular, square or rectangular cross-sectional shape, although the shape is also more irregular for the production of layered objects Form can serve.

A machine is known for the manufacture of objects from asbestos cement, in which the objects by simultaneous, layer by layer introduction of the asbestos cement mass can be produced in several forms. In contrast, through the invention the quality of the manufactured objects thereby

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can be improved that the asbestos cement mass is fed to the individual forms independently of one another, but the layer-by-layer introduction of the mass should be retained with its advantages.

Accordingly, the invention consists in the fact that the mold for the production of objects from asbestos cement consists of two separable molded parts and a core arranged in it and adjacent to it, which can be lifted off from it by supplying a pressure medium while inflating to compress the parts introduced into the mold Asbestos cement mass consists and on one side with a feed chamber and ηώ. the opposite side is provided with a discharge chamber for the pasty asbestos cement mass, both of which are connected by narrow, elongated passage openings with the mold space formed between the core or the flexible wall parts and the molded parts, in such a way that the asbestos cement mass from the supply chamber via the one assigned to it , elongated opening in layer form enters the mold space, the excess part of the asbestos-cement mass exiting the mold via the discharge chamber.

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The following is the invention with reference to the in the drawing described three embodiments shown, which, however, only represent examples in Linzelteile and in with respect to the cross-sectional shape and / or longitudinal sectional shape the objects to be manufactured can be changed as desired.

In the drawing show:

Pi- ";. 1 a lung cut through a for making tubular Manufacturing mold used for objects of square cross-sectional shape;

Pig. Figure 2 is a cross-section along the line H-H of Pig. 1;

Pij. 3 shows a cross section through a production mold for Roof or ridge tiles}

Pig. 4 shows a section along the line I-I in Pig. 3, and

Pig. 5 shows a cross section through roughly the Pig. 3 corresponding shape, but provided with a movable bottom part is.

According to Fig. 1-the Porm consists of two molded parts 1 and 2,

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which are connected to one another by a hinge 3 in such a way that the mold is opened or closed by opening and pulling flaps can be. The two mold parts 1 and 2 are provided with water outlet openings 4, and the mold space 24 is the mold limited on the outer circumference by a filter 5 of known design, for example by a perforated plate, one or two Wire screens of various mesh sizes or a knitted fabric, preferably made of plastic fibers, can be formed.

Two rings 6 and 7 are arranged in the mold, which are inserted into corresponding grooves in the mold halves and are provided on the inside of the grooves with two other rings 8 and 9 made of rubber or some other elastically flexible material.

Furthermore, the shape has two delimiting them at their front ends Closing body provided, each in the form of a., R Coil are formed. On the inside of each of these coils is a flexible wall, for example made of rubber, 14 on the core 13 attached, while on the other side of the coil or end body 1o, 11 through this with end parts of the form outer end walls of the form are formed.

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The closing body 1 ο, 11 are also used to store Axle lugs 12 for the core.

At both ends of the mold are between the outer end walls the closing body 1 o, 11 and the end walls of the core 13 chambers 16 and 17 are formed. Around the ends of the Core 13 around are formed between this and the rings 6,7 narrow, elongated openings 18 and "19, which in the circumferential direction and of which the opening 18 the feed ο opening for the asbestos-cement mass in the mold space 24 and the other opening 19 forms the outlet opening for the!, Let out of the mold space 24 into the chamber 17, these Chamber forms a discharge chamber for excess asbestos cement mass introduced into the mold space. The peripheral openings 18, 19 have a rectangular passage cross-section and correspond to the design of the mold space 24. They correspond hence the design of the walls of the tubular object produced. The entire mold space 24 is on its ends through the openings 18,19 with the chambers 16,17 tied together.

An opening is arranged at the bottom of each of the chambers 16, 17, are connected to the pipes 2o and 21. One of these

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Pipelines, in the illustrated embodiment, the Pipeline 2o is equipped with a feeding device for the asbestos-cement mass, e.g. an injection device, or a pressure pump or the like ♦ »to bring in the haters Pressure connected. Stopcock valves 2o, 25 are arranged in the pipelines 2o, 21.

To manufacture an object, the tap valve 22 is shown in d'er pipeline 2o opened, so that liquid or pasty asbestos cement mass enter the chamber 16 under pressure can and fills this chamber. From this chamber the mass is pressed through the opening 18 into the mold space, whereby they correspond to the elongated circumferential shape the opening in a uniform peripheral layer enters the mold space. The asbestos cement mass penetrates evenly into the four parts of the mold space 24 and forms in the process a layer of asbestos cement. When feeding the asbestos cement mass the other tap valve 21 is open so that the in air present in the mold space can escape via this tap valve ".. \

When the asbestos-cement mass reaches the other end of the mold, if it is excess, it enters the drainage

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chamber 17 and fills it. From chamber 17 comes out the excess asbestos cement mass via the pipeline 21 and the faucet valve 23 out of the mold and does not become one shown Mhrhehälters supplied from which the mass reaches the pressure pump or the injection device again. As soon as asbestos cement mass emerges from the drilling line 21, the two cock valves are temporarily closed and compressed air introduced through line 15 through which the flexible wall 14 surrounding the core 13 is inflated and from this .wird, so that the through this wall exerted pressure the asbestos cement mass located in the Sormraum compressed and thereby pushes the excess mass into the discharge chamber 17.

In the case of an AVF, these "/ eise trained manufacturing foiai the object to be formed can be produced from layers stacked on top of one another, which, however, are used to form the object are intimately connected. This manufacturing method can e.g. used for objects that have a relatively thick wall. It can be advantageous here to use the layered layers to be compacted in layers * E.g. * can a part of the asbestos cement mass introduced into the Eörm and through Inflation of the flexible Y / andungs member be compressed, whereupon then further asbestos mass is fed in and through this mass

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layer formed in turn by expanding the flexible Wall member is compressed until the lOrm space is completely filled is and the asbestos cement layers in detail, - but also in. Whole are condensed. The 'form of Fig. 2 can can also be used in a manner other than that described above. In particular, the asbestos cement mass can also through the pipe 21 is fed and the excess mass be derived through the pipeline 2o.

The layer-by-layer supply of the asbestos cement mass leads to a deposit taking place on the periphery of the mold space Mass at which the asbestos fibers in the finished item an advantageous position for absorbing bending stresses or take direction and are intimately matted with one another, This advantageous deposit is due in particular to the uniform and simultaneous penetration of the asbestos cement * mass in the whole, form is due.

Even if the rail valves 22, 23 are not temporarily closed before the air is supplied through the line 15 _f . the mold space 24 is closed automatically when the flexible wall member 14 is inflated ttfid comes into contact with the ¹ rings 8 and 9, whereby the openings 18 * 19 are closed *

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By changing the design of the moldings and the core as well as the chambers 16, 17 and the end rings 6, 7 can also cylindrical pipes or pipes of a different cross-sectional shape are produced, which can run in a straight line or can also be curved and, for example, pipe bends or branch pieces with two or more branches and finally other types τοη can form hollow objects.

In Pig * 3 a mold is shown which is used for the production of

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Objects profiled in two directions, ζ «B». Roof or ^w ridge tiles, which are provided with "a main channel and have corrugations running at right angles to this channel. The shape according to FIG. 5 consists of a bottom part 25 and an upper part 28, both of which are connected to each other by a hinge 27th the bottom part 25 of the mold is provided with not shown exhaust ports for draining the mold and with a multilayer filter 26th the two mold parts 25, 28 are mutually abgedichtei ;, by sightings 29%

In the upper part 28 a core 30 is arranged, which in turn is covered by inflatable flexible wall parts, for example made of rubber. The air required for inflation is supplied through the pipe 32. Since one of the "inflatable walls" 31 is provided with a thinned 3-part at 33. On the * hurried volume of the base plate 25 of the mold, a rubber member 34 is attached to a passage opening, which will be explained later *

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one wall of the upper mold part 28 is a chamber 55 Arranged that runs along the entire wall and with the lOmraum 40 through a transverse narrow opening 36 with a zone 37 of reduced width is connected, which is in the area of the thinned rope 33 of the inflatable wall member 31 The cylinder 35 forms the feed chamber for the asbestos cement mass and is connected via a pipe 38 to an injection device or a pressure pump for feeding in the asbestos cement mass.

On the opposite side of the mold is another chamber 39 arranged, which on their entire length according to FIG. 4 with the Mold space 40 is connected and via a continuous opening 41, di be, i of this embodiment is designed to be corrugated and corresponds to the corrugated cross-sectional shape of the roof tiles to be produced, bit is connected to the mold space. The chamber 39 again forms a deflection karamer, via which the excess Asbestzeeentmasae arrives in a pipe 42 and from this fed to a stirred tank (not shown) will. The in the Fif. 5 and 4 is shown in the form used in the same way as the form according to FIGS. 1 and 2. Here, the asbestos cementoasse also arrives at the same time and Ib essential across the entire width of the mold in this, where it penetrates into the mold space in layer form via the narrowed 37 (or through the passage opening ^ 1). 'In this embodiment of the Fora, the supply of asbestos cement mass through the narrowed zone 33 under *

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broken as soon as the iles-ible wall member 31 is inflated. The passage opening 41 is also closed here, since the flexible wall member comes into contact with the ring 34. In addition, the opening 36 through the inflation of the Wandungsgliedes 31 in the dilute zone 33 ^- closed, completed whereby the whole Forraraum 40 and the asbestos-cement mass located therein is prevented from vährend exit of caused by the swelling of the flexible Wandungsgliedes 51 compression from the mold .

The one in Pig. 5 of the production form according to Pig.3, which is also used to produce roof or ridge tiles, has a lower mold part 43 which can be displaced in the vertical direction with respect to walls 44, 45 of the upper mold part 46. The mold halves are not connected to one another by a joint. ⁿ ia other features of the manufacturing mold of FIG agree with the features. 3 and 4 agree.

The embodiment according to FIG. 5 has the gate part that it has a allows greater working speed. So, after the mold space 40 is filled with Aabest cement mass, the lower part of the mold 43 are raised within the mold 46 in order to compact the asbestos cement mass located in the mold space and Push off excess water until the mass is no longer liquid (Pascal * s limit). If those The limit is reached, 32 compressed air is through the pipes

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supplied and thereby a second compaction of the Asbestos cement maese brought about by the expansion of the flexible wall member 31. After these processes have been carried out, the Porm lower part 43 let down and τοη the upper mold part 46 be removed, in which it is detected e.g. by suction grippers will.

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Claims (4)

Expectations 1. .Form suit Manufacture of items from asbestos cement, characterized in that it consists of two separable molded parts (1, 2j 25, 28) and a core arranged in it (13 »'30) and adjacent to this, by supplying a pressure medium with inflation can be lifted from it flexible Wall parts (14 »31) for compressing the asbestos cement mass introduced into the mold and on one side with it a feed chamber (16, 35) and on the opposite side with a discharge chamber (17, 39) for the pasty Asbestos cement mass is provided, both through narrow elongated passage openings (18, 19; 33 »41) with the between Sera core or * the flexible wall parts and the mold parts formed space (24, 40) are connected in such a way, that the asbestos cement mass from the feed chamber (16, 35) Via the elongated passage opening (18, 33) assigned to it, it enters the mold space in layer form, the excess Part of the Asbestzementmaeae from the form about the leltungalcaaaer is displaced. 2. Mold according to claim 1, characterized in that dip beldsa molded parts (1, Z \ 25, 28) are connected to one another by an articulation (3, 2?). -H- . 109835/0041 SAD ORIOINAt 3. Pom according to claim 1 or 2, characterized in, that the elongated passage openings (18, 19; 33, 41) are adapted in their design to the cross-sectional or longitudinal shape of the object to be produced. 4. Mold according to one or more of the preceding claims, characterized in that the supply chamber (16, 35) with a BinspritzTorrichtung or a pressure pump connected through which the excess is pressed into the mold Asbestos cup into the drainage chamber (17 * 39) derived from this and a feed tank via a line is supplied « De * patent attorney 101835/0041 ORIGINAL BATHROOM »