CN204869703U - A mould for making plastic materials part - Google Patents

Abstract

The utility model relates to a component and moving element constitution mold cavity (4) on the closed position of mould (1), is fixed including fixed component (2) and moving element (3) in mould (1) of making plastic materials (MP) part, this mould, the characterized in that of mould, at least one includes sealed closed system (5) that at least one is used for closed mold cavity (4) hermetcally in the component, seal closed system (5) and be equipped with at least one flexible surface (6) of making by elastic material, the surperficial closed surperficial sealing contact who allows realization and mold cavity (4) of this flexible, and flexible surface (6) is installed to sliding in wall (7) of mould (1) to adjust this sealing contact.

Description

For the manufacture of the mould of plastic material piece

Technical field

The utility model relates to by being molded, particularly by the compression molded technical field manufacturing plastic material piece.

Especially, the utility model relates to a kind of mould, and this mould is suitable for manufacturing the composite material component needing mould closure member accurately to dock, such as, comprise the parts of plug-in unit or have the parts of topography (profilaccident é) at edge-of-part.

Background technology

In order to manufacture thermoplasticity or heat cured plastic material piece, known being used in closed mould carries out the molded method of hot compression under stress, wherein said mould is generally closed relative to the movement of the retaining element of mould by the moving element (being activated by press) of mould, and these elements are generally formed from steel.

Usually, arrange the loaded planar (plandechargement) be made up of sheet of plastics material in compression mould, wherein said plastic material is generally the composite of what is called " SMC(sheet molding compound) ".This abbreviation comes from English name " sheetmouldingcompound " or " sheetmouldingcomposite ".The sheet of this sheet such as being made up of thermosetting resin, this thermosetting resin is generally polyester, vinyl esters or epoxy resin type, but also may be the thermosetting resin of other types, this thermosetting resin is impregnated with such as glass fibre or other reinforces (such as having the reinforce accounting for weight 20% to 30%), and often with filler (charge) and/or catalyst (curing agent).

Then, molded pressure, with close die, is passed to plastic material by start cylinder subsequently that activate press.

Due to relative movement when each element of mould is heated, almost cannot reserve enough little functional clearance to ensure the sealing between these two elements between the moving element of mould and retaining element, this is the restrictive condition coming from mould installation especially, in the prior art, these restrictive conditions require the assemblage gap ensureing non-zero at ambient temperature, and this also allows to ensure that mould element is without locking ground relative motion.This assemblage gap keeps roughly constant when mould is elevated to molding temperature (usually close to 150 ° of C).When parts to be molded have large size time, more important to the control in this gap.

This causes the resin of fluidify under the effect of the thermokinetics condition in molding cavity when molded, infiltrate retaining element and the moving element of mould, this causes on be molded parts exists overlap usually in the plane being parallel to mould closing direction (very normally, this direction is vertical).Except losing corresponding material, these overlaps also cause the high cost produced when deflashing operation subsequently, and the operator that this deflashing operation requirements is responsible for this operation spends a large amount of time.

Also propose in application WO2014091175 and realized such compression mould: this compression mould has comprised movable sealing parts or the movable cushion block of the main activities element being different from mould, and these movable sealing parts or movable cushion block are disposed in one or more groove seat be arranged in the retaining element of mould.These seal members designed to be able to and expand and the parts be formed from steel be adjacent to mutually, to realize sealing.But because movable cushion block also must be installed with the assemblage gap that works, and overlap can be caused in this gap, so this technical scheme is not dealt with problems satisfactorily.

In addition, the molded of some parts causes the moving element of mould and the docking flaw of retaining element.These docking flaws can cause resin to infiltrate, thus cause overlap on be molded parts, and these overlaps are not in the plane being parallel to mould closing direction, but in vertical plane.

For such as comprising the parts of plug-in unit or there are at edge-of-part the parts of topography (profile of nonplanar, rough, to comprise change shape), this docking flaw can be produced.

In fact, between two plastic material sheet piles, to arrange that the resin that plug-in unit increases the weight of between the retaining element of molded period mould and moving element and around plug-in unit infiltrates in a mold, this makes the overlap on be molded parts more serious.In addition, if plug-in unit is deformable, if such as form the material of plug-in unit not tolerate the closed pressure of mould element very much, if and/or plug-in unit be hollow, so just run into the support problem forming the retaining element of mould and the steel of moving element.In fact, for these parts, excessive pressure can not be applied, otherwise have the risk damaging plug-in unit.

In addition, when manufacturing plug-in unit, there is the dimensional discrepancy of parts, each plug-in unit namely production line produced just in time does not have identical size, particularly on the closing direction of mould.Have on large-sized parts, the global shape flaw of these parts can reach phase difference millimeter between different parts, causes the docking of sealing not between the retaining element of mould and moving element.

Edge-of-part is comprised to the parts of topography (namely the profile of parts is not plane, but comprises the shape of fluctuating on mould closing direction), also can produce this docking flaw.In this case, two elements (retaining element and moving element) of mould ideally must be bonded with each other when mould closes.But, namely allow to manufacture this mould, be also extremely difficult to ensure that the perfection of the retaining element of mould and the shape of moving element engages.In fact, the adjustment of these elements be generally formed from steel requires the precision too high relative to the precision of instrument.

Thus, the parts comprising complex outline on its edge or comprise plug-in unit cause adjustment flaw (d é fautsd ' ajustement), thus cause overlap on the direction perpendicular to mould closing direction.

At present, these overlaps are difficult to remove, and are unfavorable for the production of the type parts (with plug-in unit, the parts with the profile of fluctuating), because need to carry out deflashing operation after the moulding.

Existing sealing solution do not consider the type overlap and especially in a mold to Overmolded (surmoulage) that plug-in unit carries out, therefore can not avoid the overlap around plug-in unit.

Summary of the invention

The purpose of this utility model is to solve these defects, and proposes a kind of compression molded, and this compression molded permission is molded the composite material component comprising such as plug-in unit with not docking flaw.

For this reason, especially, theme of the present utility model is a kind of mould for the manufacture of plastic material piece, this mould comprises retaining element and moving element, these elements form the cavity of mould in mold closed position, wherein, in described element, at least one comprises at least one seal closure system for close die cavity hermetically.Sealing closed-system is provided with at least one deformable surface be made up of elastomeric material, and this deformable surface allows to realize contacting with the sealing of the closure surfaces (surface of plug-in unit or the surface of mould element) of mould cavity.In addition, deformable surface is installed to be and can slides in the wall of mould, to adjust sealing contact.

Thus, this deformable surface plays the effect of sealing on the one hand on the other hand relative to the activity of the wall of mould by means of it by means of its elasticity, wherein said elasticity allows deformable surface to adapt to any shape of closure surfaces, the necessary pressure in gap that described activity then allows deformable surface to apply its elastic deformation and reduce between deformable surface and closure surfaces.Sealing system is very favorable relative to the activity of the wall of mould for compression mould.In fact, for the mould of the type, must realize sealing before making plastic material pressurized, this is because when compressing, plastic material flows, and therefore can flow out cavity.

Meet the sealing that mould of the present utility model allows to improve such as plug-in unit place thus, this is avoided reprocessing overlap after the moulding.

According to the utility model, elastomeric material can comprise polyether-ether-ketone.

Preferably, the translation that deformable surface can carry out being parallel to mould closing direction is moved.

According to the utility model, sealing closed-system can comprise the device for making deformable surface movement in wall, this mobile device is suitable for making this deformable surface abut in closure surfaces, to form the reaction force of the power that moving element applies at plastic material compression stage.This mobile device can be hydraulic actuation cylinder.

According to an embodiment, deformable surface has the shape of the closure surfaces complementation contacted with described deformable surface.

According to an embodiment, sealing closed-system is provided with at least two deformable surfaces, one of them deformable surface is installed to be and can slides in the wall of retaining element, another deformable surface is then installed to be and can slides in the wall of moving element, these two deformable surfaces cooperate mutually, to avoid plastic material outflow for the cavity of Overmolded mould.

According to this embodiment, one in these deformable surfaces can be installed to be and is fixed in the wall of mould.

The utility model also relates to a kind of method by means of meeting the next Overmolded plug-in unit of mould plastic material of the present utility model, in the method, at least one surface of plug-in unit is used as closure surfaces.

Accompanying drawing explanation

Read the accompanying drawing provided, the utility model will become apparent exemplarily and not in any limiting sensely.In the drawings:

Figure 1A schematically illustrates the mould in an open position meeting the first embodiment of the present utility model, and Figure 1B schematically illustrates the mould in the close position meeting the first embodiment of the present utility model;

Fig. 2 A, Fig. 2 B and Fig. 2 C schematically illustrate the mould meeting the first embodiment of the present utility model, and Fig. 2 A shows the layout of plug-in unit, Fig. 2 B shows mould closed, Fig. 2 C show compression stage;

Fig. 3 schematically illustrates the mould meeting the second embodiment of the present utility model, and on the top of Fig. 3, this mould is in an open position, then arranges plug-in unit in the bottom of Fig. 3;

Fig. 4 shows an embodiment, and in this embodiment, deformable surface partly withstands in closure surfaces.

Detailed description of the invention

Referring now to Figure 1A, Figure 1B, the figure shows the example meeting mould 1 of the present utility model, the parts that mould 1 is made for the manufacture of plastic material MP.

It is preferably fixing that mould 1 comprises the first element 2 and the second element 3, first element, and the second element 3 is preferably movable and can move along the closing direction of mould.

In the closing position of mould 1, two elements 2,3 directly or by parts come mutually against, and form mould cavity 4.According to the example of Fig. 2 A to Fig. 2 C, these two elements 2,3, against plug-in unit 9, limit the Overmolded cavity of plug-in unit 9.Mould 1 during Fig. 2 A shows following steps: the plug-in unit 9 arranging metal or composite in mould 1 and the sheet be made up of the plastic material MP of SMC type.

One in the element 2,3 of mould 1 between the first element 2 and the second element 3 (at Figure 1A, Figure 1B) comprise at least one for making mould cavity 4 seal in order to avoid plastic material MP flows out the seal closure system 5 of cavity 4.Sealing closed-system 5 comprises at least one elastic material block, and this elastic material block is provided with deformable surface 6, and this deformable surface allows to realize contacting with the sealing of the closure surfaces of mould cavity 4." elastomeric material " refers to the material that at least can accept the remaining reversible deformation of 0.1mm under common molded pressure and temperature (pressure of about 100 bar and the temperature of about 150 ° of C).The deformable surface 6 should be made up of elastomeric material is installed to be and can slides in the wall 7 of mould 1.Preferably, deformable surface 6 can be moved by the translation being parallel to the closing direction of mould 1.

Thus, deformable surface 6 one aspect plays the effect of sealing on the other hand by means of its activity by means of its elasticity, wherein said elasticity allows deformable surface to adapt to any shape of closure surfaces, the necessary pressure in gap that described activity then allows deformable surface to apply its elastic deformation and reduce between deformable surface 6 and closure surfaces.

Closure surfaces can be the surface of in mould element 2,3 one, or as shown in Fig. 2 A to Fig. 2 C and Fig. 4, is the surface of plug-in unit 9.As shown in Figure 4, deformable surface 6 can partly withstand in closure surfaces, and namely only some contacts with closure surfaces deformable surface 6.Other parts then directly can contact with plastic material MP.

According to an embodiment, the elastomeric material of deformable surface 6 comprises the polymer at least one or the multiple set be made up of the polyether-ether-ketone of so-called PEEK.

This PEEK material has different grades.In order to avoid the overlap on the direction perpendicular to mould closing direction and especially between surface 6 and closure surfaces, those skilled in the art selects to allow the thickness on surface 6 on mould closing direction, be out of shape the grade of the PEEK of about 0.1mm according to material used and pressure used and temperature, to allow the adjustment of sealing between the element that realizes causing close die cavity 4.

Elastomeric material can also only comprise or comprise in combination Teflon (Teflon) PFA(PTFE), VITON (synthetic rubber of fluorinated elastomer family).

Elastomeric material can also comprise other compositions.Such as, elastomeric material can comprise and at least accounts for weight 65%, preferably at least accounts for polymer in one or more set be made up of the polyamidoimide of the polyimides of the polyether-ether-ketone of so-called PEEK, so-called PI, so-called PAI, the polyphenylene sulfide of so-called PPS and VITON of weight 90%.

According to the utility model, deformable surface 6 directly can contact with plastic material MP.

Deformable surface 6 preferably has the shape of closure surfaces (the such as plug-in unit 9) complementation contacted with deformable surface 6.As shown in Figure 3 and Figure 4, regardless of the shape of plug-in unit 9, surface 6 can both realize optimum sealing.

According to the embodiment of Figure 1A, Figure 1B and Fig. 2 A to Fig. 2 C, seal closure system 5 comprises the elastic material block being provided with deformable surface 6, and each elastic material block is disposed in support member 6 ' by chimeric.This support member 6 ' carries deformable surface 6 thus, ensures the comprehensive engagement (contactfranc) with closure surfaces (such as: the outer surface of plug-in unit 9).

One or more elastic material block can be arranged in mould 1.These elastic material blocks are preferably disposed in the upper and lower of mould, are namely disposed on retaining element 2 with on moving element 3.

According to the example of Figure 1A, Figure 1B and Fig. 2 A to Fig. 2 C, seal closure system 5 is provided with at least two deformable surfaces 6.A deformable surface is installed to be and can slides in the wall 7 of retaining element 2, and another deformable surface is then installed to be and can slides in the wall 7 of moving element 3.These two deformable surfaces 6 contacted with plug-in unit 9 cooperate mutually, flow out mould cavity 4 to avoid plastic material MP.As shown in Figure 1A, Figure 1B and Fig. 2 A to Fig. 2 C, these two deformable surfaces are opposed facing thus, to produce optimum sealing before compression starts.

Advantageously, seal closure system 5 comprises the mobile device 8 for making deformable surface 6 movement in wall 7.This system allows to make deformable surface 6 abut in closure surfaces (such as plug-in unit 9), to form the reaction force of the power that moving element 3 applies when compressing plastic material MP stage.Fig. 2 C shows the power of compression stage.

In the example of Figure 1A, Figure 1B and Fig. 2 A to Fig. 2 C, deformable surface 6 is dynamic with hydraulic actuation cylinder 8 by support member 6 ', to produce optimum sealing before compression starts.

According to another embodiment illustrated in figs. 3 and 4, seal closure system 5 is provided with at least two deformable surfaces 6, one of them deformable surface is installed to be and can slides in the wall 7 of an element 2,3, and another deformable surface is then installed to be in the wall 7 being fixed on another element 3,2.These two deformable surfaces contacted with closure surfaces (such as plug-in unit 9) cooperate mutually, flow out mould cavity 4 to avoid plastic material MP.As shown in Figure 3 and Figure 4, these two deformable surfaces are opposed facing thus, before starting in compression, produce optimum sealing.

The utility model also relates to a kind of method by means of meeting the next Overmolded plug-in unit of mould 1 plastic material of the present utility model.

According to the example of Figure 1A, Figure 1B and Fig. 2 A to Fig. 2 C, the method comprises at least following steps:

(when Overmolded on both surfaces) plug-in unit 9 to be molded is disposed on the elastic material block of the punch 2 being in high position together with plastic material MP, and wherein said elastic material block is provided with deformable surface 6;

Closed press 3, until the deformable surface 6 on top contacts with plug-in unit 9.Plastic material MP is not also compressed, and the fringe region (lazonedefinpiece) of parts is then sealing;

Continue press 3 is declined, until arrive the nominal edge (c t é nominale) of parts to be molded, and apply pressure, flow and polymerization to make plastic material MP.Deformable surface 6 is pressed on plug-in unit 9 all the time, to ensure sealing: in seal closure system 5, apply back-pressure by means of hydraulic actuation cylinder.Deformable surface 6 is exerted pressure between decrement phase at press 3 shrink back (inside moving back to the mold wall being wherein furnished with these deformable surfaces);

Once process (flowing, solidification) terminates, press 3 is just opened, and the parts processed are exited.

When deformable surface 6 of upper and lower, these deformable surfaces can help to exit parts at the periphery of parts.

Claims (8)

1. the mould (1) for the manufacture of plastic material (MP) parts, this mould comprises retaining element (2) and moving element (3), in the closing position of described mould (1), described retaining element and described moving element form the cavity (4) of described mould (1), the feature of described mould is, in described element, at least one comprises at least one for closing the seal closure system (5) of described cavity (4) hermetically, described seal closure system (5) is provided with at least one deformable surface be made up of elastomeric material (6), this deformable surface allows to realize contacting with the sealing of the closure surfaces of described mould cavity (4), and described deformable surface (6) is installed to be and can slides in the wall of described mould (1) (7), to adjust described sealing contact.

2. mould (1) as claimed in claim 1, it is characterized in that, described elastomeric material comprises polyether-ether-ketone.

3. the mould (1) according to any one of the claims, is characterized in that, the translation that described deformable surface (6) can carry out the closing direction being parallel to described mould (1) is moved.

4. the mould (1) according to any one of the claims 1-2, it is characterized in that, described seal closure system (5) comprises the device (8) for making described deformable surface (6) movement in described wall (7), this mobile device is suitable for making described deformable surface (6) abut in described closure surfaces, to form the reaction force of the power that described moving element (3) applies at described plastic material (MP) compression stage.

5. mould (1) as claimed in claim 4, it is characterized in that, described mobile device (8) is hydraulic actuation cylinder.

6. the mould (1) according to any one of the claims 1-2, is characterized in that, described deformable surface (6) has the shape of the closure surfaces complementation contacted with described deformable surface (6).

7. the mould (1) according to any one of the claims 1-2, it is characterized in that, described seal closure system (5) is provided with at least two deformable surfaces (6), one of them deformable surface is installed to be and can slides in the wall of described retaining element (2) (7), another deformable surface is then installed to be and can slides in the wall of described moving element (3) (7), described two deformable surfaces cooperate mutually, flow out be used for Overmolded described cavity (4) to avoid described plastic material (MP).

8. mould (1) as claimed in claim 7, it is characterized in that, one in described deformable surface is installed to be in the wall (7) being fixed on described mould (1).