CN212736702U

CN212736702U - Mold for manufacturing parts for vehicle interior

Info

Publication number: CN212736702U
Application number: CN201922293837.0U
Authority: CN
Inventors: 昆汀·詹森; 西尔文·贝利亚德
Original assignee: Faurecia Interieur Industrie SAS
Current assignee: Faurecia Interieur Industrie SAS
Priority date: 2018-12-19
Filing date: 2019-12-18
Publication date: 2021-03-19
Anticipated expiration: 2029-12-18
Also published as: FR3090455B1; PT115976A; FR3090455A1

Abstract

The utility model relates to a mould for making inside part of vehicle. The mould comprises a retaining wedge (20) for retaining a first portion (6) of the part (4) and a restraining system (26) for selectively restraining the retaining wedge (20) in a closed position and in an open position, and the restraining system (26) enables the part (4) to be extracted by forcing the retaining wedge (20) to move against the restraining system (26), the restraining system being configured to selectively restrain the retaining wedge (4) in the closed position and in the open position, the restraining system being configured to generate a force that returns the retaining wedge (20) towards the open position when the retaining wedge (20) is located in the vicinity of the open position, so as to disengage the retaining wedge (20) from the part (4) without affecting the part (4) any more at the end of the movement of the retaining wedge (20) towards the open position during extraction of the part (4).

Description

Mold for manufacturing parts for vehicle interior

[ technical field ] A method for producing a semiconductor device

The present invention relates to the field of manufacturing parts by assembling a first part and a second part, the first part preferably at least partially covering the second part.

[ background of the invention ]

To manufacture such a part, a mold may be used that is configured to apply (apply) a first portion to a mold surface of the mold, move at least one retaining wedge from an open position to a closed position to retain the first portion against the mold surface, overmold (surmour) a second portion on the first portion, and then move the retaining wedge from the closed position to the open position by means of an action means (actionneuro) to remove the part. Such a mold is described in FR2985975a 1.

However, the presence of the action means for moving the retaining wedge between the open position and the closed position increases the bulk and complexity of the mould. In addition, the action means need to be controlled synchronously with the other components of the mould, which makes the use of the mould more complicated.

A mold comprising retaining wedges configured as follows may be used: the retaining wedge is configured such that the mold can be forcibly removed by forcibly moving the retaining wedge or by elastic deformation of the retaining wedge. Such a mold is described in FR3054161a 1.

However, due to the friction of the retaining wedge, which tends to turn towards its own closed position, against the area with which the retaining area of the part is in contact, there is a risk of damaging the part when it is removed.

[ Utility model ] content

One of the objects of the present invention is to propose a mould for manufacturing a part by assembling two parts of the part in the mould, which is simple, low cost, easy to implement and limits the risk of damaging the part in the process of taking out the part from the mould.

To this end, the invention proposes a mold for manufacturing a part for a vehicle interior, the mold comprising a mold surface and a holding device comprising at least one holding wedge, characterized in that the holding wedge is adapted to hold a first part of the part against the mold surface before assembling a second part of the part to the first part inside the mold, the holding wedge being movable between a closed position for holding the first part against the mold surface and an open position enabling removal of the part, the holding device comprising a restraint system configured to selectively restrain the holding wedge in the closed position and in the open position and to enable removal of the part by forcing the holding wedge to move from the closed position to the open position against the restraint system, the restraint system being configured to generate a force that returns the holding wedge to the open position when the holding wedge is located near the open position, so that the retaining wedge disengages the part without affecting the part at the end of the movement of the retaining wedge from the closed position to the open position during the removal of the part.

The constraint system with two stable positions, namely an open position and a closed position, makes it possible to constrain the retaining wedge in the closed position during the assembly of the first part of the part and the second part of the part and in the open position during the extraction of the part, which avoids the automatic return of the retaining wedge towards the closed position, which could damage the part. The force returning to the open position as the retaining wedge approaches this position enables the retaining wedge to be moved away from the part during removal of the part to avoid the wedge rubbing at the edge of the part at the end of removal.

The mould may comprise one or more of the following optional features considered alone or according to any possible technical combination:

-the restraining system is configured to generate a magnetic attraction force to restrain the retaining wedge in the closed position and/or configured to generate a magnetic attraction force to restrain the retaining wedge in the open position;

the restraining system has a movable closing magnetic element and a fixed closing magnetic element configured to generate a magnetic attraction force therebetween to restrain the retaining wedge in the closed position, the movable closing magnetic element being movable together with the retaining wedge;

the restraint system has a movable opening magnetic element and a fixed opening magnetic element configured to generate a magnetic attraction force therebetween to restrain the retaining wedge in the open position, the movable opening magnetic element being movable together with the retaining wedge;

-the restraint system is configured to adjust the position of the movable opening magnetic element with respect to the retaining wedge, so as to enable adjustment of the opening position of the retaining wedge;

the restraint system comprises a locking element actuated by a spring (solliciter) for snapping in the cavity when the retaining wedge is in the closed position or in the open position;

the locking element is configured to selectively snap in the first cavity when the retaining wedge is in the closed position and in the second cavity when the retaining wedge is in the open position;

the locking element is arranged on a base fixed with respect to the mould surface, the or each cavity being located on the retaining wedge; and

the restraint system is configured to selectively restrain the retaining wedge in a closed position or in an open position, with no stable intermediate position between the closed position and the open position.

The present invention also relates to a method of manufacturing a part for a vehicle interior by assembling a first part and a second part, the first part at least partially covering the second part, the method comprising:

-placing the first part on a mould surface of a mould;

-holding the first part against the mould surface by means of a holding wedge of a holding device;

-assembling the second portion on the first portion to obtain a part;

-removing the part with force by forcibly moving the retaining wedge against a restraining system configured to selectively restrain the retaining wedge in the closed position and in the open position, the restraining system being configured to generate a force that returns the retaining wedge towards the open position when the retaining wedge is located in the vicinity of the open position, so as to disengage the retaining wedge from the part without affecting the part at the end of the movement of the retaining wedge from the closed position towards the open position during removal of the part.

[ description of the drawings ]

The invention and its advantages will be better understood by reading the following description, which is given by way of example only, and with reference to the accompanying drawings, in which:

fig. 1-2 fig. 1 and 2 are sectional views of a mold for manufacturing a part by fixing a support part to a decorative part, the mold being in two different configurations during the manufacture of the part;

fig. 3-4 fig. 3 and 4 are sectional views of a mould according to a variant, in two different configurations during the manufacture of the part;

FIG. 5 is a rear view of the retaining wedge showing the restraint system;

FIG. 6 is a partial view showing a retaining wedge of the restraint system;

fig. 7 fig. 8 fig. 7 and 8 are sectional views of a mold according to a modification in two different configurations during the manufacture of a part.

[ detailed description ] embodiments

The mold 2 of fig. 1 and 2 is configured to manufacture a part 4 (fig. 2) by assembling a first portion 6 and a second portion 8, the first portion 6 being, for example, prepared for at least partially covering the second portion 8. The part 4 is a part of the vehicle interior, in particular a lining element of the vehicle interior.

The first portion 6 has a front face 6A intended to be visible and an opposite rear face 6B. The second portion 8 is fixed to the back face 6B. The front face 6A is opposite the second portion 8, and the back face 6B faces the second portion 8.

The first portion 6 is, for example, a decorative portion, in particular a decorative sheet, which is intended to give the piece 4 a particular appearance. The first part 6 is for example a film of thermoplastic material or a piece of wooden material such as wood, aluminium, textile or other. The thermoplastic material of the first portion 6 is for example selected from the group: polyolefin resins, in particular PP (polypropylene), PVC (polyvinyl chloride), ABS (acrylonitrile butadiene styrene), PC-ABS (polycarbonate-acrylonitrile butadiene) styrene), PC (polycarbonate), PMMA (poly (methyl methacrylate)).

The second part 8 is for example a support part intended for carrying the first part 6. The second part 8 is made of a plastic material, which is reinforced if necessary by a filler, which may consist of particles or fibres.

The mould 2 is configured to apply the first part 6 to the mould surface 10 and then to assemble the second part 8 to the first part 6 by applying the second part 8 to the mould surface 10. The mould 2 comprises at least one mould part carrying a mould surface 10.

The mould surface 10 is configured, for example, to apply the front face 6A of the first part 6 to the mould surface 10 in order to secure the second part 8 against the rear face 6B of the seated first part 6 by applying the second part 8 to the mould surface 10.

The mould 2 is here configured to overmould the second part 8 onto the first part 6 against a mould surface 10, more precisely onto the back 6B of the first part 6. The result of overmoulding the second part 8 onto the first part 6 is that the second part 8 is assembled to the first part 6.

The mould 2 here comprises a first mould part 12 and a second mould part 14 configured to define a moulding cavity 16 therebetween for moulding the support 6.

The first and

second mold portions

12, 14 are movable relative to one another between an open configuration, in which the first and

second mold portions

12, 14 are spaced apart from one another (fig. 1, 2, and 4), and a closed configuration, in which the first and

second mold portions

12, 14 are brought closer to one another (fig. 3) and define a molding cavity 16.

The first and

second mold portions

12, 14 are translationally movable relative to each other between an open configuration and a closed configuration along an opening/closing direction of the mold 2.

When the first and

second mold portions

12, 14 are in the open configuration, the mold 2 is open, and when the first and

second mold portions

12, 14 are in the closed configuration, the mold 2 is closed.

The molding cavity 16 is defined in part by the mold surface 10. The mould surface 10 is here provided on a first mould part 12.

The mold 2 is, for example, an injection-molded mold. In such a case, at least one of the first and

second mold portions

12, 14 includes an injection tube for injecting molding material into the molding cavity 16 when the mold is closed.

As a variant, the mould 2 is a compression-moulded mould, which is arranged to insert the moulding material when the mould 2 is open, and to close the mould 2 to shape the moulding material by compression between the first and

second mould parts

12, 14.

The mould 2 comprises holding means 18 for holding the first part 6 against the mould surface 10 before fixing the second part 8 on the first part 6.

The holding device 18 comprises a holding wedge 20 for holding the first part 6 in place against the mould surface 10 before assembling the second part 8.

The retaining wedge 20 has a retaining surface 22 extending protruding from the mold surface 10 to retain the first portion 6 against the mold surface 10.

The holding surface 22 is undercut with respect to the extraction direction to hold the first portion 6 (or the molded portion 4) outside the mold 2.

The holding surface 22 here extends substantially perpendicular to the direction D in which the first and

second mould parts

12, 14 move relative to each other between the open configuration and the closed configuration.

The holding device 18 is configured such that the part 4 can be forcibly removed against the holding device 18 by forcibly moving the holding wedge 20.

The retaining wedge 20 is mounted so as to be movable with respect to the mould surface 10 between a closed position (fig. 1) for retaining the decorative element 8 and an open position (fig. 2) enabling the part 4 to be extracted.

In the closed position, the retaining wedge 20 resists extraction of the first portion 6 out of the mold 2, more specifically, resists the first portion 6 from moving away from the molding surface 10 in substantially the same direction as the opening direction E of the mold 2.

In the open position, the retaining wedge 20 does not affect the first portion 6 (or part 4) during extraction of the first portion 6 (or part 4) from the mold 2, and more specifically, does not affect the first portion 6 away from the molding surface 10.

The retaining wedge 20 is here mounted pivotable about an axis of rotation a relative to the mould surface 10.

The retaining wedge 20 is, for example, mounted to be movable, for example by means of a shaft 25, relative to a base 24, the base 24 being fixed relative to the mould surface 10.

The retaining device 18 comprises a restraining system 26, which restraining system 26 is configured to selectively restrain the retaining wedge 20 in the closed position and in the open position of the retaining wedge 20.

Preferably, the restraint system 26 is configured to selectively restrain the retaining wedge 20 in either the closed position or the open position without locking the retaining wedge 20 between the closed position and the open position.

The restraint system 26 is configured to generate a force that returns the retaining wedge 20 towards the open position when the retaining wedge 20 is located in the vicinity of the open position, so that the retaining wedge 20 disengages from the part 4 without affecting the part 4 at the end of the movement of the retaining wedge 20 from the closed position towards the open position during the removal of the part 4.

The return force is generated, for example, at 20% of the stroke of the retaining wedge 20 between the closed and open positions, for example at 10% of the stroke of the retaining wedge 20 between the closed and open positions, in particular at 5% of the stroke of the retaining wedge 20 between the closed and open positions.

This return force causes the retaining wedge 20 to be pushed away by the part 4 at the beginning of the movement of the retaining wedge 20 from the closed position to the open position during the extraction of the part 4, and then the retaining wedge 20 is returned to the open position by the restraining system 26 at the end of the movement of the retaining wedge 20 from the closed position to the open position, which prevents, in particular, the retaining wedge 20 from rubbing against the periphery of the part 4 and, in particular, against the first portion 6.

The restraint system 26 is, for example, magnetic and uses magnetic elements, in particular comprising one or more magnets, arranged to selectively restrain the retaining wedge 20 in the closed position or in the open position.

The constraint system 26 comprises a movable closing magnetic element 28, for example carried by the retaining wedge 20 and rigidly connected to and moving with the retaining wedge 20, and a fixed closing magnetic element 30, for example carried by the base 24, fixed with respect to the first mould part 12, the two closing magnetic elements 30 being configured to generate a magnetic attraction force therebetween to constrain the retaining wedge 20 in the closed position.

In the closed position of the retaining wedge 20 (fig. 1), the movable closing magnetic element 28 and the fixed closing magnetic element 30 are close to each other and constrain the retaining wedge 20 in the closed position.

The retaining wedge 20 may be forcibly moved from the closed position to the open position (fig. 2) against the magnetic force generated by the movable closing magnetic element 28 and the fixed closing magnetic element 30.

The retaining wedge 20 is not locked during its movement between the closed position and the open position.

As the retaining wedge 20 is forced from the closed position toward the open position, the magnetic restraining force rapidly decreases as the movable closure magnetic element 28 and the fixed closure magnetic element 30 move away.

One of the movable closing magnetic element 28 and the fixed closing magnetic element 30 is for example a magnet, in particular a permanent magnet, the other is a magnet, in particular a permanent magnet, or a ferromagnetic element which can be magnetized by a magnet.

In the example shown, both the movable closing magnetic element 28 and the fixed closing magnetic element 30 are permanent magnets.

In a possible variant, the movable closing magnetic element 28 is a permanent magnet and the fixed closing magnetic element 30 is a ferromagnetic element, or the movable closing magnetic element 28 is a ferromagnetic element and the fixed closing magnetic element 30 is a permanent magnet.

Restraint system 26 includes a movable opening magnetic element 32 and a fixed opening magnetic element 34, movable opening magnetic element 32 being rigidly connected to and moving with, for example, retaining wedge 20, fixed opening magnetic element 34 being fixed relative to first mold portion 12 and carried by, for example, base 24, movable opening magnetic element 32 and fixed opening magnetic element 34 being configured to generate a magnetic attraction force therebetween to restrain retaining wedge 20 in the open position.

In the open position of the retaining wedge 20 (fig. 2), the movable opening magnetic element 32 and the fixed opening magnetic element 34 are close to each other and constrain the retaining wedge 20 in the open position.

When the retaining wedge 20 is in the closed position, the movable opening magnetic element 32 and the fixed opening magnetic element 34 are far away from each other and the attraction between them is weak. They do not spontaneously urge the retaining wedge 20 to move to the open position.

During the movement of the retaining wedge 20 from the closed position to the open position, before the retaining wedge 20 reaches the open position, the movable opening magnetic element 32 and the fixed opening magnetic element 34 generate a force that returns the retaining wedge 20 to the open position, so that the retaining wedge 20 can disengage from the part 4, so that the retaining wedge 20 no longer affects the part 4.

One of the movable opening magnetic element 32 and the fixed opening magnetic element 34 is a magnet, in particular a permanent magnet, and the other is a magnet, in particular a permanent magnet, or a ferromagnetic element.

In the example shown, both the movable opening magnetic element 32 and the fixed opening magnetic element 34 are permanent magnets.

In a possible variant, the movable opening magnetic element 32 is a permanent magnet and the fixed opening magnetic element 34 is a ferromagnetic element, or the movable opening magnetic element 32 is a ferromagnetic element and the fixed opening magnetic element 34 is a permanent magnet.

Advantageously, the position of at least one of the movable opening magnetic element 32 and the fixed opening magnetic element 34 is adjustable, so as to adjust the opening position of the retaining wedge 20.

In one embodiment, the movable opening magnetic element 32 is carried by a magnetic element support 36, the magnetic element support 36 being rigidly connected to the retaining wedge 20 and moving therewith, the position of the magnetic element support 36 relative to the retaining wedge 20 being adjustable in order to adjust the opening position of the retaining wedge 20.

The magnetic element support 36 here has the shape of an arm that rotates integrally with the retaining wedge 20. The magnetic element support 36 may be adjusted by: the magnetic element support 36 is rotated relative to the retaining wedge 20 about the axis of rotation a.

The magnetic element support 36 is held in the adjustment position, for example by a fastening device which rigidly connects the magnetic element support 36 and the holding wedge to each other.

Optionally, the retaining wedge 20 has a retaining wedge body 38 and a retaining wedge insert 40 fixed to the retaining wedge body 38, the retaining wedge insert 40 constituting the part of the retaining wedge 20 intended to be in contact with the first part 6 constrained in the mould 2.

The retaining wedge insert 40 is, for example, detachably mounted on the retaining wedge body 38. Thus, various retaining wedge inserts 40 may be used depending on the application, in particular depending on the part 4 to be manufactured.

The retaining device 18 of the mold 2 of fig. 3 and 4 differs from the retaining device 18 of the mold 2 of fig. 1 and 2 in that its restraining system 26 is mechanical, and this restraining system 26 is configured to selectively lock the retaining wedge 20 in the closed position or in the open position.

The restraint system 26 comprises, for example, at least one locking element 42 mounted on one of the retaining wedge 20 and the base 24 and configured to snap into at least one

cavity

44, 46 provided on the other of the retaining wedge 20 and the base 24 for selectively locking the retaining wedge 20 in the closed position and in the open position.

Each locking element 42 is movable between a locking position, in which the locking element 42 snaps into the

cavity

44, 46 and locks the movement of the retaining wedge 20, and a release position, in which the locking element 42 disengages from the or each

cavity

44, 46 and enables the movement of the retaining wedge 20 between the closed position and the open position.

Restraint system 26 has a spring 48 associated with each locking element 42 and arranged to urge locking element 42 towards its locking position.

In one embodiment, the restraint system 26 comprises a retractable locking element 42 mounted on one of the retaining wedge 20 and the base 24 and configured to be selectively snapped in a first cavity 44 and a second cavity 46 provided on the other of the retaining wedge 20 and the base 24 to lock the retaining wedge 20, the snapping of the locking element 42 in the first cavity 44 enabling the locking of the retaining wedge 20 in the closed position and the snapping of the locking element 42 in the second cavity 46 enabling the locking of the retaining wedge 20 in the open position.

The locking element 42 is, for example, mounted on the base 24, so that the first cavity 44 and the second cavity 46 are provided on the retaining wedge 20. The first cavity 44 and the second cavity 46 are angularly spaced about the axis of rotation a such that when the locking element 42 is snapped in the first cavity 44, the retaining wedge 20 is locked in the closed position, and when the locking element 42 is snapped in the second cavity 46, the retaining wedge 20 is locked in the open position.

As a variant, the configuration may be reversed. The locking element 42 is for example mounted on the retaining wedge 20, so that the first cavity 44 and the second cavity 46 are arranged on the base 24.

Each locking element 42 is movable, for example, in a direction forming a non-zero angle with the axis of rotation a, between its locking position and release position. Each locking element 42 is movable, for example, along a direction contained in a plane perpendicular to the rotation axis a. Here, each locking element is radially movable relative to the axis of rotation a.

In operation, the locking element 42 snaps into the first cavity 44 when the retaining wedge 20 is in the closed position. The retaining wedge 20 is forced against the locking element 42, and the locking element 42 is forced out of the first cavity 44 against the spring 48.

The retaining wedge 20 may be moved from the closed position to the open position without locking the retaining wedge 20 between the closed position and the open position.

When the retaining wedge 20 reaches the closed position, the locking element 42 snaps in the second cavity 46 and prevents, for example, the retaining wedge 20 from returning to the closed position, which could damage the part 4.

In another embodiment shown in fig. 5, each locking element 42 is movable in a direction parallel to the axis of rotation a.

The mechanical restraint system 26 is configured to generate a force that returns the retaining wedge 20 towards the open position when the retaining wedge 20 is located in the vicinity of the open position, so that the retaining wedge 20 disengages from the part 4 without affecting the part 4 at the end of the movement of the retaining wedge 20 from the closed position towards the open position during the removal of the part 4.

To this end, each locking element 42 and the cavity provided with the locking element 42 to be inserted into the open position of the retaining wedge 20 have a shape that makes it possible to generate a force that returns the retaining wedge 20 to the open position when the retaining wedge 20 approaches the open position and before the retaining wedge 20 has reached the open position.

These shapes may be sliding surfaces provided on the locking element 42 and the corresponding cavity.

The retaining wedge 20 shown in fig. 6 differs from the retaining wedge shown in fig. 3 and 4 in that the second cavity 46 has an entry portion 46A and a locking portion 46B, in which locking portion 46B the locking element 42 is inserted in the open position of the retaining wedge 20, the entry portion 46A enabling the return force to be generated.

In one embodiment, as shown in fig. 7 and 8, a retaining wedge 20 may be provided, wherein the retaining wedge insert 40 is mounted to be movable on the retaining wedge body 38. This makes it possible to impart an additional freedom of movement to the retaining wedge insert 40 in contact with the part 4 with respect to the part 4, making it possible to limit the friction of the retaining wedge insert 40 on the part 4 during the extraction of the part 4 from the mould 2.

The retaining wedge insert 40 is mounted, for example, rotatable on the retaining wedge body 38, in particular about an axis of rotation B parallel to the axis of rotation a of the retaining wedge 20 (more precisely, then the axis of rotation a of the retaining wedge body 38).

As shown in fig. 7 and 8, the retaining wedge insert 40, which is mounted to rotate on the retaining wedge body 38, can slide more easily on the second mould part 14, which enables the retaining wedge 20 to be more easily disengaged from the part 4 when the part 4 is extracted from the mould 2.

Of course, the retaining wedge 20 is provided with a stop to limit the play of the retaining wedge insert 40 relative to the retaining wedge body 38, so that the retaining wedge 20 retains its function of retaining the first portion 6 against the mould surface 10.

In particular, the stop prevents the movement of the retaining wedge insert 40 relative to the retaining wedge body 38 in the direction of release of the first portion 6 or piece 4, solely by the thrust exerted by the first portion 6 or piece 4 in the direction of removal of the piece.

In the method of manufacturing a part carried out with one of the molds in fig. 1 to 8, the mold 2 is initially open, with the retaining wedge 20 in the open position.

The first part 6 is inserted into the mould 2, for example by handling a robot, and the holding wedges 20 are placed in the closed position to hold the first part 6 against the mould surface 10. The placement of the holding wedge 20 in the closed position is for example achieved by a handling robot which places the first part 6 against the mould surface 10.

The retaining wedge 20 is constrained in the closed position by a constraint system 26, for example by magnetic attraction between the movable closing magnetic element 28 and the fixed closing magnetic element 30 (fig. 1) or by locking by the snap-in of the locking element 42 in the first cavity 44 (fig. 4).

The mould 2 is then closed in order to assemble the second part 8 with the first part 6.

In the case of injection moulding, the mould 2 is closed and then material is injected into the mould 2 to form the second part 8.

In the case of compression moulding, the material in a viscous state is introduced into the mould 2, and then the mould 2 is closed to compress the material in a viscous state and obtain the second part 8 assembled on the first part 6.

Once the second portion 8 is molded and sufficiently cured, the mold 2 is opened and the part 4 is forcibly extracted from the mold 2 against the retaining wedge 20, and in particular against the restraining system 26 of the retaining wedge 20.

In the mold of fig. 1 and 2, the part 4 is extracted by forcing the retaining wedge 20 against the movement of the movable closing magnetic element 28 and the fixed closing magnetic element 30. The retaining wedge 20 may move without locking into the open position. Once the retaining wedge 20 is fully opened, the retaining wedge 20 is attracted and restrained in the open position by the movable opening magnetic element 32 and the fixed opening magnetic element 34.

In the mold of fig. 3 and 4 or 5 to 8, the part 4 is extracted by forcing the retaining wedge 20 to move against the locking element 42, and the retaining wedge 20 is then moved, without locking, towards the open position, in which it locks again.

The provision of the restraining system 26 which makes it possible to restrain the retaining wedge 20 in a stable open position and a stable closed position, preferably without restraining the retaining wedge 20 in a stable intermediate position between the open position and the closed position, makes it possible to ensure that the retaining wedge is retained in the open position, limiting the risk of damaging the piece 4, in particular the edge of the piece 4 which is in contact with the retaining wedge 20 in the closed position.

Preferably, the open position of the retaining wedge 20 ensures that there is a non-zero clearance between the retaining wedge 20 and the part 4 during extraction of the part 4. Thus, the piece 4 can be taken out while limiting the risk of damaging the piece 4, in particular the edge of the piece 4 in contact with the retaining wedge 20 in the closed position.

The provision of the retaining wedge insert 40 on the retaining wedge enables such clearance to be adjusted during manufacture according to the part 4. If necessary, the system for adjusting the opening position also makes it possible to adjust the opening position of the retaining wedge 20 and, consequently, the clearance between the retaining wedge 20 and the part 4 in the opening position during extraction of the part 4 from the mould 2.

Advantageously, the mold 2 comprises a retaining wedge 20 with a universal retaining wedge body 8 and a specific retaining wedge insert 40. The universal retaining wedge body 8 can be used with a variety of molds 2 prepared for a variety of applications, i.e., a variety of molds 2 used to produce different parts 4. The retaining wedge insert 40 is then specific to each mould 2 and is adapted to each application, in particular to each different part 4 produced with the mould 2. This enables the provision of a retaining wedge insert 40 specific to each process equipment.

Thus, the present invention generally relates to a first and a second mold each comprising a retaining wedge 20 and a restraint system 26, the retaining wedge bodies 38 of the retaining wedges 20 of the first and second mold being identical and the retaining wedge inserts 40 of the retaining wedges 20 of the first and second mold being different.

The present invention is not limited to the above-described embodiments and modifications.

In particular, a hybrid restraint system 26 may be provided, i.e., employing both mechanical and magnetic properties. Restraint system 26 may combine a closure magnetic element with a mechanical opening component or an opening magnetic element with a mechanical closure component.

Claims

1. Mould for manufacturing a part (4) of a vehicle interior, comprising a mould surface (10) and a holding device (18) comprising at least one holding wedge (20), the holding wedge (20) being for holding a first portion (6) of the part (4) against the mould surface (10) before assembling a second portion (8) of the part (4) to the first portion (6) inside the mould, characterized in that the holding wedge (20) is movable between a closed position for holding the first portion (6) against the mould surface (10) and an open position enabling removal of the part (4), the holding device (18) comprising a restraining system (26), the restraining system (26) being configured to selectively restrain the holding wedge (20) in the closed position and in the open position and to move the holding wedge (20) from the closed position to the open position against the restraining system (26) The part (4) can be removed, the restraining system being configured to generate a force that returns the retaining wedge (20) towards the open position when the retaining wedge (20) is located in the vicinity of the open position, so as to disengage the retaining wedge (20) from the part (4) without affecting the part (4) at the end of the movement of the retaining wedge (20) from the closed position towards the open position during the removal of the part (4).

2. The mold according to claim 1, wherein the restraint system (26) is configured to generate a magnetic attraction force to restrain the retaining wedge (20) in the closed position and/or to generate a magnetic attraction force to restrain the retaining wedge (20) in the open position.

3. A mould according to claim 1 or claim 2, wherein the constraint system (26) has a movable closing magnetic element (28) and a fixed closing magnetic element (30) configured to generate a magnetic attraction force therebetween to constrain the retaining wedge (20) in the closed position, the movable closing magnetic element (28) being movable together with the retaining wedge (20).

4. Mould according to claim 2, wherein the constraint system (26) has a movable opening magnetic element (32) and a fixed opening magnetic element (34) configured to generate a magnetic attraction force therebetween to constrain the retaining wedge (20) in the open position, the movable opening magnetic element (32) being movable together with the retaining wedge (20).

5. The mold according to claim 4, wherein the restraint system (26) is configured to adjust the position of the movable opening magnetic element (32) with respect to the retaining wedge (20) so as to enable adjustment of the opening position of the retaining wedge (20).

6. The mold according to claim 1, wherein the restraint system (26) comprises a locking element (42) actuated by a spring (48) for snapping in the cavity (44, 46) when the retaining wedge (20) is in the closed position or in the open position.

7. The mold of claim 6, wherein the locking element (42) is configured to selectively snap in the first cavity (44) when the retaining wedge (20) is in the closed position and in the second cavity (46) when the retaining wedge (20) is in the open position.

8. Mould according to claim 6, wherein the locking element (42) is arranged on a base (24) fixed with respect to the mould surface (10), the or each cavity (44, 46) being located on the retaining wedge (20).

9. The mold according to claim 1, wherein the restraint system (26) is configured to selectively restrain the retaining wedge (20) in a closed position or an open position, with no stable intermediate position between the closed position and the open position.