JP2007062277A - In-mold foam molding apparatus and in-mold foam molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-mold foam molding apparatus capable of obtaining well balanced in the thickness of a resin foam layer as a whole by magnifying a molding space in a desired direction even with respect to a part incapable of obtaining a molding space sufficient to foam a foamable resin, and an in-mold foam molding method. <P>SOLUTION: The in-mold foam molding apparatus 1 comprises at least a movable mold 11, a fixed mold 12 and an injection means for injecting the foamable resin 22a in the molding space formed when both molds are closed and further comprises a mold moving means 40 for causing second movement d2 different from the movement d1 in a mold opening direction in either one of the movable mold 11 and the fixed mold 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an in-mold foam molding apparatus and a molding method for foam molding a resin foam layer on the surface of a substrate having a surface inclined with respect to the mold opening direction on at least a part of the surface. The present invention relates to an in-mold foam molding apparatus capable of laminating a resin foam layer having a desired thickness on a base material and a molding method thereof.

  Conventionally, interior parts in automobiles are generally laminated with a resin foam layer (soft layer) on a base material in order to give a high-class feeling. This interior part is shown in FIG. This is molded by the in-mold foam molding apparatus 50. Specifically, after molding the base material 21 such as polyvinyl chloride, the base material 21 is arranged on one of the molds 10 including the movable mold 11 and the fixed mold 12 (in the figure, on the movable mold 11), and the mold is clamped. Do. Next, the molding space formed after mold clamping is filled with a foaming resin made of polyurethane, polypropylene, or the like containing a foaming gas such as carbon dioxide gas, and water is injected into the space to bring the foaming resin into a high temperature. Use high pressure. Then, the pair of wedge pieces 51, 51 arranged so as to come into contact with the opposing even portions 13, 13 of the fixed mold 12 are moved to the predetermined position in the direction in which the mold is opened by the motor 52 under the same speed condition. Widen molding space. Due to the expansion of the molding space, the gas dissolved in the resin is decompressed under high-temperature and high-pressure conditions and grows as bubbles in the resin. Layer 22b is laminated. Thereafter, the mold 10 is held until the temperature of the resin foam layer 22b is lowered to a predetermined temperature and the layer is solidified. Thereafter, the mold (opening) is performed to move the movable mold 11 upward, and the product (interior part) 20 is taken out. .

  As an example of such foam molding, mold resin is injected into a cavity where the mold is closed, and after the injection of foam resin is completed, the movable mold of the mold is moved until the resin reaches the reference wall thickness position. An injection foam molding method is described in which a resin is expanded by a foaming gas while the gas is blown (see Patent Document 1).

JP-A-9-157426

  By the way, such an interior part has a complicated shape as shown in FIG. 5, and when the molding method as described above is performed, the thickness (foaming ratio) of the resin foam layer of each part is as follows. , It will be different. That is, in the portion A where the mold opening direction and the normal direction of the base material surface substantially coincide with each other, the thickness t1 that increases in the normal direction of the base material surface substantially coincides with the movement amount x of this mold. As shown in FIG. 6 (enlarged view of B part in FIG. 5), in the part B where the substrate surface is inclined at an angle θ with respect to the mold opening direction, the base movement amount x is The thickness t2 of the resin foam layer that increases in the normal direction of the material surface is xcos (90 ° −θ). The closer the inclination angle of the inclined surface to the mold opening direction approaches 0 °, the more the mold is opened. Since the space is not enlarged, the thickness t2 of the resin foam layer that increases with respect to the movement amount x of the mold is reduced.

  As described above, when manufacturing an interior part having a complicated shape, there is a portion (for example, portion B in FIG. 5) in which a molding space for molding the resin foam layer cannot be sufficiently secured during foam molding. The thickness of the resin foam layer laminated on the base material varies. And in the location where the thickness of the resin foam layer 22b is large, since the bubbles are sufficiently grown in the resin, the surface has a sufficient soft feeling, but in the location where the thickness is small, the growth of the bubbles is thick. It cannot be said that it is sufficient compared to a large one, and its texture is very different from that of a thick part. In this way, the texture of the entire product (soft feeling) was uneven.

  The present invention has been made in view of such problems, and the object of the present invention is to provide a desired molding space for a portion where a sufficient molding space for foaming the foamed resin could not be obtained. An object of the present invention is to provide an in-mold foam molding apparatus and a molding method thereof that can obtain a product that is balanced in overall thickness of the resin foam layer by expanding the molding space in the direction.

  The present inventors have conducted many experiments and researches to solve the above-described problems, thereby moving the molding die linearly along the mold opening direction and forming the molding space where the thickness of the resin foam layer is to be increased. In order to ensure that the resin foam layer having a balanced thickness can be formed on the entire surface of the product by giving the mold a second movement different from the linear movement. Obtained.

  The present invention is based on the above new knowledge obtained by the present inventors, and the in-mold foam molding method according to the present invention is based on a base having a surface inclined with respect to the mold opening direction on at least a part of the surface. A method of foam-molding a resin foam layer on the surface of the material, the step of disposing the base material in the first mold such that the base material surface faces the molding surface of the second mold; A step of clamping the mold of 1 and the second mold, a step of filling the foaming resin into the molding space after the clamping, a foaming step of foaming the foamable resin after filling the foamable resin, and after foaming A step of opening a mold and taking out a product in which a resin foam layer is laminated on the surface of a substrate, and an in-mold foam molding method, wherein the foaming step moves either or both of the molds. Expands molding space and foams foamable resin while securing space for resin foam layer molding A mold movement step, and the mold movement step is performed by a combined movement of a first movement in the mold opening direction and a second movement different from the movement in the mold opening direction. Yes.

  In the in-mold foam molding method as in the present invention, either or both of the first mold and the second mold are linearly moved as the first movement in the mold opening direction, and the movement in the mold opening direction is Since the first mold and the second mold are relatively compounded by performing different second movements, with respect to the mold opening direction that has not been able to secure a sufficient molding space until now. A resin foam layer can be sufficiently laminated on the inclined substrate surface, and a product with a balanced texture on the entire surface can be produced.

  The second movement is different from the movement in the mold opening (clamping) direction, which is the first movement. For example, the first movement and the second mold do not interfere with each other. Rotation (turning) may be performed around one end of the first or second mold, or the first or second mold may be linearly moved in different directions. In this way, by performing a combined movement including the second movement on the mold, it is laminated on the surface of the base material that is inclined with respect to the mold opening direction as compared with the case where the mold is simply moved in the mold opening direction. It is possible to increase the thickness of the resin foam layer (increase the expansion ratio).

  In addition, the mold used here is such that the foamable resin injected into the molding space when the base material is placed and clamped is brought into a high-temperature and high-pressure state by injection of foaming gas such as water vapor. The molding space is preferably a mold that is a closed space.

  Furthermore, the base material disposed in the mold may be a resin base material such as vinyl chloride that has been molded by injection molding in another mold in advance, or may be a metal base material that has been molded by press molding. The foamable resin is preferably a polyurethane resin or a polypropylene resin in which a foaming gas such as carbon dioxide is dissolved. The combination of gases is not particularly limited.

  As a more preferred aspect, the second movement in the mold movement step is a distance from the start of mold movement at a distance in a direction normal to the molding surface of the second mold in at least a part of the inclined surface of the substrate surface. It includes a movement that brings the increase amount close to the movement amount of the mold in the mold opening direction.

  By performing such a movement, the thickness of the resin foam layer laminated on the surface of the substrate inclined with respect to the mold opening direction is changed to the surface of the substrate perpendicular to the mold opening direction where the thickness is the thickest. The thickness of the laminated resin foam layer can be approached.

  More preferably, one mold is a movable mold and the other mold is a fixed mold, and the mold moving step is performed by giving the combined movement to the fixed mold. In this way, when the fixed mold is given a combined movement, it can be implemented with a general apparatus configuration in which a pair of wedge pieces are provided so as to come into contact with the opposing even portions of the fixed mold, as will be described later. Since the fixed mold can be combined and moved by changing the inclination angle of the inclined surface of the piece, it is not necessary to make a large-scale facility modification.

  As another aspect, the mold moving step may be performed by giving the first movement to a movable mold and giving the second movement to a stationary mold. That is, by utilizing the fact that the movable mold operates in the mold opening direction, the movable mold is linearly moved in the mold opening direction, and the fixed mold is moved in a direction different from the linear movement. The device configuration is simplified. Further, the second movement may be a movement that rotates (turns) the fixed mold around one of the opposing even parts of the fixed mold as the rotation center. As described above, in a range in which the movable mold and the fixed mold do not interfere with each other, the composite mold is moved to one or both of the fixed mold and the movable mold, thereby being laminated on the surface of the substrate inclined with respect to the mold opening direction. The thickness of the resin foam layer can be increased to a desired thickness (predetermined expansion ratio), and a suitable soft feeling can be obtained for the entire product.

  As an apparatus that can effectively carry out the above-described in-mold foam molding method, the present invention injects a foamable resin into a movable space, a fixed mold, and a molding space formed when both molds are closed. An in-mold foam molding apparatus including at least an injection unit, wherein the apparatus causes a second movement at least different from a movement in the mold opening direction to one of the movable mold and the fixed mold when the mold is opened. Also disclosed is an in-mold foam molding apparatus characterized by further comprising mold moving means.

  Using such a molding apparatus, as described above, first, a base material molded by a press or the like is placed on a movable mold or a fixed mold, and then both molds are clamped. Then, the foamable resin is injected into the closed space formed by the mold clamping. The injection means for injecting the foamable resin may be any device that can inject the foamable resin into the molding space and make the resin foamable when the pressure is reduced (mold opening). The combination mechanism of a device that injects a foam-like resin into a molding space and a device that injects water for fusing the resin with the resin in a high-temperature and high-pressure state in the molding space is generally a cylinder. It may be a cylinder and piston mechanism that encloses a foam resin in a high temperature and high pressure state and pushes it into the molding space by a piston. It may be a mechanism that pushes into the molding space.

  Thus, the foamable resin filled in the molding space in a foamable state by the injection means is decompressed by the expansion of the molding space using the mold moving means, and the foamable resin foams in the expanded molding space, A resin foam layer is laminated on the substrate. When the mold is opened, the mold moving means causes the second movement at least different from the movement in the mold opening direction to occur in one of the movable mold and the fixed mold, so that the mold is simply moved in the mold opening direction. The thickness of the resin foam layer laminated on the surface of the substrate that is inclined with respect to the mold opening direction can be increased (the expansion ratio is increased) as compared with the case where is moved. As a result, it is possible to manufacture a product that balances the soft feeling of the entire surface.

  This mold moving means is preferably a means for moving one of the movable mold and the fixed mold so as to be inclined with respect to the mold opening direction. In this way, by moving the mold so as to be inclined with respect to the mold opening direction, the foamable resin can be foamed into the molding space expanded by the inclined attitude.

  The mold moving means preferably includes at least a pair of wedge pieces that abut against the opposing even portions of the fixed mold and a control means for controlling the amount of advance and retreat of the pair of wedge pieces relative to the fixed mold. By separately controlling the amount of advance and retreat, the fixed mold can be moved so as to be inclined with respect to the mold opening direction. In such a mold moving means, each wedge piece is connected to a motor such as a servo motor via, for example, a linear guide, a ball spline mechanism, etc., and by separately controlling the rotational speed of the two motors, A mode in which the wedge piece is advanced and retracted independently is preferable. Further, as another aspect, a pair of cylinders that advance and retreat in the mold opening direction may be provided at both ends of the opposing even portion of the fixed mold, and the above-described amount of the cylinder can be controlled individually and independently. The fixed mold can be moved to an inclined posture in the same manner as described above. In addition, when performing cylinder stroke control in this way, it is preferable to use a hydraulic cylinder that is less variable with respect to the load acting on the cylinder.

  Moreover, as a preferable aspect using a wedge piece, the inclined surface of at least a part of one wedge piece has an inclination angle different from that of the other inclined surface. As described above, when the fixed mold even portion is slid on the surface inclined in the advancing / retreating direction of the wedge piece and the fixed mold is moved, the movement amount of the fixed mold even portion is the amount of movement of the wedge piece. Since it depends on the inclination angle of the wedge-shaped inclined surface, the fixed mold can be inclined by setting the inclination angles of the pair of wedge molds to different angles. In particular, when a pair of wedge pieces are configured to have the same advance / retreat speed, the fixed mold can be easily moved to an inclined posture by changing the inclination angle of the wedge. Can do.

  According to the present invention, it is possible to expand the molding space in a desired direction by moving the mold in a complex manner even for a portion where a sufficient molding space could not be obtained, and the entire resin foaming A product with a balanced thickness can be obtained.

  Hereinafter, the present invention will be described based on some embodiments with reference to the drawings. FIG. 1 is a schematic diagram for explaining a device configuration of an in-mold foam molding apparatus 1 that can suitably carry out the in-mold foam molding method according to the present invention, and FIG. 2 is a diagram for moving a stationary mold. FIG. 3 is a schematic diagram for explaining the mold moving means 40, and FIG. 3 is a schematic diagram for explaining a molding process when foam molding is performed using the in-mold foam molding apparatus 1 of FIG. These are the expansion schematic diagrams of the C section in the process of FIG.3 (c). The same members as those of the conventional apparatus 70 shown in FIG. 5 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the illustrated example, an in-mold foam molding apparatus 1 is a molding apparatus for in-mold foam molding a resin foam layer on the surface of a base material 21 having a surface 21a inclined with respect to the mold opening direction on at least a part of the surface. The apparatus 1 mainly includes a mold 10 for molding a resin foam layer on a base material, a mold moving means 40 for moving one of the molds 10 (a fixed mold to be described later), and a foamable resin 22a. An injection device (injection means) (not shown) for injecting into a foamable state is provided. The molding die 10 includes a movable die 11 and a fixed die 12, and a molding space is formed when the movable die 11 having a base material 21 described later is clamped together with the fixed die 12. ing. In addition, an injection port (not shown) for injecting foamed resin into the molding space by an injection device is provided in a part of the movable mold 11 or the fixed mold 12 forming the molding space. The outlet communicates with the injection device.

  A mold moving means 40 is provided below the fixed mold 12, and the mold moving means 40 is connected to the fixed mold 12 during the mold opening (foaming molding) and the first movement d1 in the mold opening direction. A combined movement of the second movement d2 different from the mold opening direction is given (see FIG. 3C), and the fixed mold 12 is configured to be inclined with respect to the mold opening direction.

  Specifically, in order to make such a combined movement to the fixed mold 12, the mold moving means 40 includes a pair of wedge pieces 41 and 42 that abut against the opposing even portions 13 and 13 of the fixed mold 12, and the pair Motors (control means) 43 and 43 for controlling the amount of movement of the wedge pieces 41 and 42 with respect to the fixed mold 12.

  The wedge pieces 41, 42 are connected to the motor 43 via a ball spline bearing mechanism (not shown) or the like so that the advance / retreat amount of the wedge pieces 41, 42 is controlled in accordance with the rotational speed of the motor 43. It is connected. Further, each motor 43 can control the amount of advancement and retreat of the wedge pieces 41 and 42 independently. Furthermore, as shown in FIG. 2, the wedge pieces 41, 42 are provided with inclined surfaces 41a, 42a inclined at an inclination angle α1 with respect to the forward / backward direction of the wedge piece. An inclined surface 42b inclined at an inclination angle α2 larger than the inclination angle α1 is also provided. The forward / backward direction is a horizontal direction as shown in the figure, and the inclination angle indicates an angle inclined with respect to the horizontal direction.

  With this configuration, the vertical movement amount x of the even portions 13 and 13 of the fixed mold 12 is such that the inclination angles α1 and α2 of the inclined surfaces of the wedge pieces 41 and 42 and the wedge pieces 41 and 42 are It depends on the amount of advance and retreat (the amount of movement x in the vertical direction x = tan (α1, α2) × the amount of advance / retreat of the wedge piece is satisfied). The movement is determined. That is, when the wedge pieces 41 and 42 contacting the even portions 13 and 13 have the same inclination angle α1 and the wedge pieces 41 and 42 have the same amount of advance and retreat, the fixed-type even portions 13 and 13 move downward. Since the amount x becomes the same, the fixed mold 12 simply moves d1 in the mold opening direction. However, when the even parts 13 and 13 come into contact with the inclined surface of one wedge piece 42 with the inclination angle α2, or when the forward and backward speeds of the wedge pieces 41 and 42 are different, the fixed-type even parts 13 and 13 Since the downward movement amount of 13 is different, the fixed mold 12 moves in the mold opening direction (first movement d1), but makes a second movement d2 different from that.

  Below, an example of the shaping | molding process of the product which has the resin foam layer using the in-mold foam molding apparatus 1 shown in FIG. 1 is demonstrated. First, as shown in FIG. 3A, at least a part of the surface of the base material 21 having a surface 21a inclined with respect to the mold opening direction is set so that the base material surface faces the molding surface of the fixed mold 12. It is arranged in the movable mold 11. Then, the movable mold 11 and the fixed mold 12 are clamped, and the molding space after the mold clamping is filled with the foamable resin 22a by the injection device, and the foamable resin 22a is made foamable.

  Next, as shown in FIGS. 3B and 3C, a mold moving step of expanding the molding space by moving the fixed mold 12 and foaming the foamable resin while ensuring a space for molding the resin foam layer. I do. First, in order to avoid the interference of the mold due to the combined movement of the fixed mold, as shown in FIG. 3B, using the motors 43, 43, the wedge pieces 41, 42 are moved away from the fixed mold 12 (retracting direction). ) In the same speed condition. At this time, since the inclination angles of the inclined surfaces 41a and 42a of the two wedge pieces 41 and 42 that contact the even parts 13 and 13 of the fixed mold 12 are the same as α1, the fixed mold 12 moves in the mold opening direction. (First movement d1) is performed.

  Then, as shown in FIG. 3 (c), the fixed mold 12 is combined with a first movement d1 in the mold opening direction and a second movement d2 different from the movement in the mold opening direction. Specifically, using the motors 43 and 43, the wedge pieces 41 and 42 are further moved in the direction away from the mold under the same speed condition as in FIG. However, since the angles of the inclined surfaces of the wedge pieces 41 and 42 that contact the fixed mold 12 are different (the wedge piece 42 has an inclination angle α2 and larger than α1), the downward direction of the even portions 13 and 13 is reduced. The movement amount is different (the lowering amount on the right side of the drawing is larger), and the fixed mold 12 has a first movement d1 in the mold opening direction and a second movement d2 in a direction different from the movement (left side of the fixed mold). A combined movement that combines a rotational movement with the even part as the rotation center) is given.

  That is, as shown in FIG. 4, the second movement d2 in this mold movement step is an increase in the distance in the normal direction from the molding surface 12a of the fixed mold 12 on the inclined surface 21a of the base material surface from the start of the mold movement. The fixed mold 12 is moved so that the amount t is moved so as to approach the movement amount x of the mold in the mold opening direction. As a result, when the fixed mold 12 is simply moved in the mold opening direction. In comparison, the molding space is expanded, and the expanded molding space D increases the thickness of the resin foam layer 22b laminated on the inclined surface 21a inclined with respect to the mold opening direction (increases the expansion ratio). be able to.

  Then, when a predetermined movement is given to the fixed mold 12 and the desired resin foam layer 22b is formed, the fixed mold 12 and the movable mold 11 are held in this state, the resin foam layer 22b is radiated and cooled, and FIG. As shown in d), the movable mold 11 is moved upward to perform mold opening, and the product 20 in which the resin foam layer is laminated on the substrate surface is taken out. At the same time, the wedge pieces 41 and 42 of the mold moving means 40 are advanced to the state shown in FIG. 3A to prepare for the next foam molding step.

  Thus, compared with the case where the fixed mold is simply moved relative to the mold opening, the thickness of the resin foam layer laminated on the substrate surface inclined with respect to the mold opening direction is increased (the foaming ratio is increased). ), The product 20 can be manufactured with a balanced soft feeling on the entire surface.

  As described above, the embodiment of the in-mold foam molding apparatus and the molding method according to the present invention has been described in detail. However, the present invention is not limited to the above-described embodiment, and the present invention described in the claims. Various design changes can be made without departing from the spirit of the invention.

  For example, as shown in FIG. 3B, the fixed mold is moved in the mold opening direction in order to prevent interference between the fixed mold and the movable mold. However, the fixed mold can be combined and moved without such interference. If there is, the movement only in the mold opening direction of FIG.

  In the present embodiment, the fixed mold is moved so that the molding space is further expanded with respect to a part of the inclined surface of the base material having a surface inclined with respect to the mold opening direction. If it is desired to increase the thickness of the resin foam layer, it will be easily conceivable for those skilled in the art that the fixed mold may be moved so as to further increase the molding space for the inclined surface. .

  In addition to this, in order to move the movable mold in the mold opening direction and tilt the fixed mold, for example, only one end of the fixed mold is lowered, and the fixed mold is turned around the one end as a rotation center, The fixed mold may be moved in a second movement different from the movement in the mold opening direction.

  Furthermore, in the present embodiment, the fixed mold is tilted by rotating the two motors at the same speed so that the wedge pieces at both ends have the same retraction speed and the tilt angle of the wedge to be tilted is increased. Although the posture is set, the lowering amount of one end of the lower mold may be increased by changing the speeds of the motors at both ends, and the fixed mold may be moved in an inclined posture.

The schematic diagram which shows the apparatus structure of the in-mold foam molding apparatus which concerns on embodiment of this invention. The schematic diagram for demonstrating the type | mold moving means shown in FIG. It is explanatory drawing for performing foam molding by the in-mold foam molding apparatus shown in FIG. 1, (a) is a figure for demonstrating the process of filling with mold clamping and foamable resin, (b) is a foaming process. FIG. 6C is a diagram for explaining a process when the fixed mold is moved in the mold opening direction in FIG. 6C, and FIG. 8C is a diagram for explaining a mold moving process when the fixed mold is combined and moved in the foaming process; () Is a figure for demonstrating the process of taking out a product. Explanatory drawing for carrying out in-mold foam molding of the resin foam layer on the surface of the base material which has a surface which inclines with respect to a mold opening direction in a part of surface shown in FIG. The schematic diagram which shows the apparatus structure of the conventional in-mold foam molding apparatus. Explanatory drawing for carrying out in-mold foam molding of the resin foam layer on the surface of the base material which has a surface which inclines with respect to a mold opening direction in a part of surface shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... In-mold foam molding apparatus, 10 ... Mold, 11 ... Movable mold, 12 ... Fixed mold, 13 ... Even part, 20 ... Product, 21a ... Inclined surface, 22a ... Expandable resin, 22b ... Resin foam layer, 40 ... Movement means, 41 ... Wedge piece, 41a ... Inclined surface, 42 ... Wedge piece, 42a, 42b ... Inclined surface, 43 ... Motor, d1 ... First movement, d2 ... Second movement

Claims (8)

It is a method of in-mold foam molding a resin foam layer on the surface of a substrate having a surface inclined with respect to the mold opening direction on at least a part of the surface,
Placing the substrate on the first mold such that the surface of the substrate faces the molding surface of the second mold;
A step of clamping the first mold and the second mold;
Filling the foaming resin into the molding space after mold clamping;
A foaming step of foaming the foamable resin after filling with the foamable resin;
Opening the mold after foaming, and taking out the product in which the resin foam layer is laminated on the substrate surface;
In-mold foam molding method having at least
The foaming step has a mold moving step of expanding one or both molds to expand a molding space and foaming a foamable resin while ensuring a space for molding a resin foam layer,
The mold moving step is performed by a combined movement of a first movement in the mold opening direction and a second movement different from the movement in the mold opening direction.   The second movement in the mold movement step is the step of opening the increase amount from the start of mold movement of the distance in the normal direction to the molding surface of the second mold in at least a part of the inclined surface of the substrate surface. The in-mold foam molding method according to claim 1, further comprising a movement approaching a movement amount of the mold in the direction.   The in-mold foam molding according to claim 1 or 2, wherein one mold is a movable mold, the other mold is a fixed mold, and the mold moving step is performed by giving the combined movement to the fixed mold. Method.   One mold is a movable mold, the other mold is a fixed mold, and the mold moving step is performed by giving the first movement to the movable mold and giving the second movement to the fixed mold. The in-mold foam molding method according to claim 1 or 2. An in-mold foam molding apparatus comprising at least a movable mold and a fixed mold, and an injection means for injecting a foamable resin into a molding space formed when both molds are closed,
The apparatus further comprises a mold moving means for causing a second movement different from the movement in the mold opening direction in one of the movable mold and the fixed mold when the mold is opened. .   6. The in-mold foam molding according to claim 5, wherein the mold moving means is a means for moving one of the movable mold and the fixed mold so as to be inclined with respect to the mold opening direction. apparatus.   7. The mold moving means comprises at least a pair of wedge pieces abutting against the opposing even portions of the fixed mold and a control means for controlling the amount of advance and retreat of the pair of wedge pieces relative to the fixed mold. The in-mold foam molding apparatus described in 1.   The in-mold foam molding apparatus according to claim 7, wherein at least a part of the inclined surface of one wedge piece has an inclination angle different from that of the other wedge piece.

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