JP3574195B2 - Molding method of laminated molded article and its mold - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a method for producing a laminated molded product having both surfaces covered with a skin facing material, and produces automobile parts such as seat backs, side pillars, and door interior panels, and furniture parts such as chair backrests. Available when
[0002]
[Background Art]
Conventionally, for interior parts of automobiles, for example, interior panels of doors, seat backs, and side pillars, the surface of a synthetic resin main body is made of a multi-layer face material made of vinyl chloride, foamed polypropylene, or the like. Laminated molded articles covered with skin facing materials such as cloths have been used.
According to such a laminated molded product, since the surface is covered with a soft surface material, a good feel can be given when touched by hand, and a woven fabric or the like is used as the surface material. If it is, decorativeness can be imparted.
In addition, since a good cushioning property can be obtained by increasing the thickness of the skin surface material, the use of a laminated molded product for a console box lid or the like can suppress the impact sound at the time of opening and closing, vibration during running, and the like.
Furthermore, since the skin surface material having cushioning properties can seal the gap, good sound insulation and sealing properties can be provided.
[0003]
In order to manufacture such a laminated molded product, it is common to form a core body and then bond a skin surface material to the surface of the body. However, there is a problem that the manufacturing cost is increased because of the complicated operation.
This problem can be solved by a manufacturing method in which the skin material and the main body are integrated at the same time as molding by filling the mold in which the skin material is mounted in advance with the molten resin, and the bonding operation is omitted.
In such a manufacturing method, mounting means having the following structures A to D is used to mount the skin facing material to the mold.
A. The mold is divided into two mold parts such as a male mold and a female mold, and when closing the mold, the edge of the skin material is sandwiched between the mating surfaces of the mold parts to completely cover the skin material. Mounting means that will be fixed.
B. The mold is divided into two mold portions, and a gap having substantially the same dimension as the thickness of the skin surface material is provided between the divided surfaces of the mold portions. A mounting means that allows the skin surface material to slide freely into the mold without pressing down from both sides.
C. A tension device, such as a spring, that pulls the edge of the skin material protruding from the mold is provided around the mold, and when a force against the tension of the tension device is applied to the skin material, the edge of the skin material is removed. Mounting means (Japanese Patent Laid-Open No. 229014/1990) for mounting a skin surface material that allows the skin to slide into the mold.
D. A mold is divided into two mold parts such as a male mold and a female mold, and a fixed frame for sandwiching a skin facing material with one of the two mold parts, and the fixed frame is pressed toward the one mold part. Provide a plurality of fluid cylinder devices, etc. to clamp the skin surface material between the fixed frame and the mold, and adjust the clamping force of the fixed frame and the mold by adjusting the pressing force of the fluid cylinder device, etc. Mounting means (Japanese Patent Publication No. 4-76291).
[0004]
[Problems to be solved by the invention]
The above methods A to D have the following problems a to d.
I. Since the edge of the skin surface material is fixed so as not to move by being sandwiched between the mold portions, when molding a three-dimensional molded article having irregularities, excessive tension is applied to the skin surface material at the time of molding. For this reason, there is a problem that a skin surface material that does not stretch, such as cloth, is easily torn, and a skin surface material having cushioning properties, such as foamed polypropylene, is stretched to lose its thickness and the cushioning properties are impaired.
B. Since the skin material can slide freely into the mold, no tension is applied to the skin material. For this reason, when trying to mold a three-dimensional molded product with irregularities, the surface of the skin surface material is freely deformed due to the flow of the molten resin filled in the mold, and wrinkles are generated at the base part of the rising part. There's a problem.
D. The provision of the tension device complicates the structure of the mold, and the tension device is provided around the mold, so that the overall size of the mold is increased.
In addition, in order to pull the skin surface material with the tension device, it is necessary to connect the tension device and the skin surface material firmly to some extent, so the mounting work of the skin surface material performed for each molding becomes troublesome, and the cycle time is prolonged. However, there is a problem that the productivity of the laminated molded product cannot be improved.
In addition, since the skin material protrudes outside the mold, the ratio of the skin material that cannot be effectively used increases, and there is a problem that the skin material is wasted.
E. Since it is necessary to provide a fixed frame movably separately from the mold clamping operation of the mold, the structure of the mold becomes complicated, and a fixed frame must be created for each mold. There is a problem of soaring.
Also, if the fixed frame is divided into a plurality of parts, a fluid cylinder device is provided for each of the divided parts, and the pressing force of each cylinder device is adjusted to set the clamping force, the frictional force and the slip-in of each part of the skin surface material are set. You can adjust the amount. However, there is a boundary line where the frictional force and the amount of slip are discontinuous. If the amount of slip on both sides of this boundary greatly differs, wrinkles and tears may occur. There is a problem that molding is difficult.
[0005]
An object of the present invention is to provide a method for molding a laminated molded product that does not cause defects such as wrinkles and tears on its surface even if the molded product has a complicated shape with irregularities, and that can improve productivity, and a mold thereof. It is in.
[0006]
[Means for Solving the Problems]
The method for molding a laminated molded product of the present invention is a method for molding a laminated molded product in which a molded product having a flexible skin material adhered to the surface thereof is formed, and a mold for molding the molded product in advance is used. A plurality of fixing means for slidably holding the skin surface material are provided at a distance, and the position and number of these fixing means are set in advance according to the shape of the molded product by sliding each part of the skin surface material. The fixing means is provided in accordance with the amount, and the fixing means includes a sliding means for reducing a frictional resistance with the skin surface material at a portion in contact with the skin surface material, and a fixed mold constituting the mold And fixed to a movable mold, and after attaching the skin surface material to the mold by the fixing means, filling the molten resin and sliding the skin surface material sandwiched by the fixing means, Characterized by spreading the molten resin inside That.
In the above, the formed shape method, molding method a molten resin filled in the mold is compressed by the mold clamping of the mold to spread inside the mold can be employed.
[0007]
The mold of the laminated molded article of the present invention is a mold of a laminated molded article for molding a molded article having a skin surface material having flexibility attached to the surface, and the mold has an inlay structure. In addition, a plurality of fixing means for slidably holding the skin surface material are provided in the mold at a distance from each other, and the fixing means is fixed to a fixed mold and a movable mold constituting the mold , and A sliding means for reducing frictional resistance with the skin surface material is provided at a portion in contact with the skin surface material, and the sliding means is rotatably mounted on a portion of the fixing means abutting on the skin surface material. The device is characterized in that:
Further, the mold of the laminated molded article of the present invention is a mold of a laminated molded article for molding a molded article having a flexible skin material adhered to the surface thereof, wherein the mold has an inlay structure. And a plurality of fixing means for slidably sandwiching the skin surface material is provided in the mold, and the fixing means is fixed to a fixed mold and a moving mold constituting the mold, A sliding means for reducing the frictional resistance with the skin surface material at a portion in contact with the skin surface material, a coil spring for pressing the sliding means toward the skin surface material, and a displacement direction of the coil spring. And a pressing force adjusting means which can be fixed to an arbitrary position and adjusts the pressing force of the coil spring.
[0008]
In the above molding method, the following materials, molding apparatus, and molding procedure can be adopted.
(1) Material The synthetic resin forming the molded article includes thermoplastic resins such as polyethylene, polypropylene, polystyrene, ABS, polycarbonate, and polyamide, and talc, calcium carbonate, mica, glass fiber, and the like. Can be employed.
Examples of the skin surface material include woven fabric, nonwoven fabric, knitted fabric, and the like, thermoplastic resin surface material, thermoplastic elastomer surface material, thermoplastic resin foam surface material, and film on which a pattern or the like is printed. And a multi-layer face material obtained by appropriately bonding these single-layer face materials.
[0009]
(2) Molding device As the molding device, an injection molding machine, a press molding machine, an injection compression molding machine, or an injection press molding machine can be employed.
(3) Molding Procedure When molding is performed by the molding apparatus described above, the following molding procedure can be adopted.
{Circle around (1)} In a state where the mold is opened, the skin surface material is temporarily fixed to the movable side mold of the mold.
{Circle around (2)} When closing the mold, the movable mold is stopped at a position of a predetermined dimension, for example, about 5 to 50 mm before the completely closed position, and the movable mold is retracted from this position. Block the back of the mold so that the mold does not open.
Here, the skin surface material is sandwiched by the fixing means of the mold, and is slid into the inside of the mold when it is pulled from the inside of the mold by a certain force or more.
(3) The injection device is driven to fill the mold with the molten resin.
{Circle around (4)} Immediately before or immediately after the completion of filling, a compression force is applied to the inside of the mold to start the compression step, and the resin inside is spread by the compression force to fill the inside of the mold.
At this time, the skin surface material is pulled by the molten resin flowing inside the mold, and is drawn toward the center of the mold while maintaining an appropriate tension.
(5) If necessary, reduce the compressive force.
(6) After the resin has cooled and solidified, the mold is opened and the molded product is taken out.
[0010]
[Action]
In the present invention as described above, the fixing means is provided in the mold in accordance with the amount of slip required by the skin surface material during molding.
Specifically, a small number of fixing means are arranged in a portion where a large amount of sliding of the skin surface material is required, and a large number of fixing means are arranged in a portion where a small amount of sliding of the skin surface material is required. When the sliding amount of the skin surface material is continuously changed, the number of the fixing means is gradually increased or decreased.
Thereby, when the molten resin spreading in the mold pulls the skin surface material, the skin surface material slides into the mold by a set amount of slip before breaking even if it is sandwiched by fixing means, Appropriate tension is applied to each part of the face material, and even if the molded article has a complicated shape having irregularities, wrinkles and tears do not occur on the surface.
In addition, since the fixing means only needs to have a simple structure for sandwiching the skin surface material, the structure of the mold is not complicated, the mounting work of the skin surface material is easy, and the molding cycle is not prolonged. Thereby, the above object is achieved.
Furthermore, if a fixing means having a sliding means having a small frictional resistance with the skin surface material in a portion in contact with the skin surface material is adopted, the skin surface material starts to slip even on a skin surface material that is easily broken like paper. The required tension is reduced and does not cause tearing.
Further, if the coil spring for pressing the sliding means toward the skin surface material and the pressing force adjusting means for adjusting the pressing force of the coil spring are provided in the fixing means, the skin surface material has a large tension for sliding out. Is required, and it becomes possible to mold even a hard skin material.
Therefore, regardless of the type of the skin surface material, it is possible to form a good laminated molded product without defects such as wrinkles and tears.
[0011]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a mold 10 of the present embodiment. The mold 10 is for molding an interior panel to be attached to a door of an automobile, and is divided into a fixed mold portion 10A on the right side and a movable mold portion 10B on the left side in the drawing.
A cavity 10C filled with a molten resin is provided between the fixed mold portion 10A and the movable mold portion 10B of the mold 10. Around the cavity 10C, a plurality of fixing devices 20 are separately provided as fixing means for holding the skin material forming the surface portion of the laminated molded product.
[0012]
The fixed mold section 10A is a male mold immovably fixed to the above-mentioned injection compression molding machine. The fixed mold part 10A is provided with a sprue 11 which is a passage for the molten resin to be filled in the cavity 10C. A convex portion 13 and a concave portion 14 are formed on a molding surface 12 provided on the fixed mold portion 10A to form an armrest and a pocket provided on an automobile door.
The movable mold part 10B is a female mold movably provided in the above-mentioned injection compression molding machine. A concave surface 16 and a convex portion 17 corresponding to the convex portion 13 and the concave portion 14 of the fixed mold portion 10A are provided on the molding surface 15 of the movable mold portion 10B.
At four corners of each of the fixed mold part 10A and the movable mold part 10B, insertion holes 18 for inserting guide pins of a mold clamping device (not shown) are provided.
[0013]
As shown in FIG. 3, the fixing device 20 sandwiches the skin facing material 1, and a sliding member as a sliding means for reducing frictional resistance with the skin facing material 1 at a portion in contact with the skin facing material 1. 21 and 22 are provided. The sliding members 21 and 22 are members made of Teflon resin or the like having a small friction coefficient.
Among the sliding members 21 and 22, the sliding member 22 on the movable mold portion 10B side is bonded to the movable mold portion 10B and is integrated with the movable mold portion 10B.
On the other hand, the sliding member 21 on the fixed mold part 10A side is adhered to a pressing block 23 provided to be able to advance and retreat with respect to the movable mold part 10B.
[0014]
The pressing block 23 has a through hole 25 through which a bolt 24 screwed with the fixed mold part 10A is inserted, and slides along the axial direction of the bolt 24. A double nut 26 is screwed into the bolt 24. A coil spring 27 is interposed between the double nut 26 and the pressing block 23. The coil spring 27 presses the sliding member 21 bonded to the pressing block 23 toward the sliding member 22 on the movable mold part 10B side.
At this time, the pressing force of the coil spring 27 can be adjusted by changing the screwing position of the double nut 26. Here, the bolt 24 and the double nut 26 serve as pressing force adjusting means for adjusting the pressing force of the coil spring 27.
Note that the double nut 26 is composed of two nuts. After adjusting the pressing force of the coil spring 27, the double nut 26 is rotated in opposite directions to fix the screwing position of the double nut 26, and the adjusted pressing force is generated by vibration applied to the mold 10. The pressure does not fluctuate.
[0015]
In this embodiment, injection compression molding is performed according to the following procedure.
In manufacturing the mold 10, the slip amount of each part of the skin facing material 1 is set in advance according to the shape of the molded product, and the number and the position of the fixing device 20 are set according to the slip amount. deep. For example, the fixing device 20 is not provided in a portion where the amount of slip is desired to be increased, or the number thereof is set to be small. On the other hand, the number of the fixing devices 20 is set to be large in a portion where the amount of slip is to be reduced. Then, the set number of fixing devices 20 are provided at the set positions of the mold 10 respectively.
In this embodiment, as shown in FIG. 2, the cavity 10C of the mold 10 has four cavities on the upper side, three on the left side, three on the lower side, two on the right side, and an arc between the lower and right sides. , A total of thirteen fixing devices 20 are arranged at substantially equal intervals.
Further, before performing the injection compression molding, the pressing force of the coil spring 27 is adjusted according to the tensile strength of the skin surface material 1 and the like. Thereby, when the skin surface material 1 is strongly pulled, the skin surface material 1 slides and moves between the sliding members 21 and 22 of the fixing device 20, so that even if the skin surface material 1 is soft and easy to be broken, The surface material 1 is prevented from being torn, and an appropriate tension is applied to the skin material 1.
[0016]
In performing the injection compression molding, first, the mold 10 is opened, and after the skin surface material 1 is temporarily fixed to the fixed mold portion 10A, the mold 10 is closed.
At this time, as shown in FIG. 4 (A), the movable mold part 10B is stopped at a position B which is a predetermined distance a before the completely closed position A, and is retracted from this position B to open the mold. Block behind it so that you don't.
In addition, the dimension a can be set within a range of 5 to 50 mm.
Then, in a state where the movable mold portion 10B is not completely closed, the injection device is driven to start the filling process, and the inside of the cavity 10C of the mold 10 is filled with the molten resin 2.
Next, immediately before or immediately after the completion of the filling step, the mold clamping device is driven to start the compression step, the movable mold part 10B is advanced, and a compression force is applied to the molten resin 2 inside the cavity 10C.
At this time, the compressed molten resin 2 flows toward the corners of the cavity 10C and pulls the skin facing material 1 toward the inside of the cavity 10C. As shown in FIG. 4 (B), the edge portion of the pulled skin surface material 1 slides between the sliding members 21 and 22 of the fixing device 20 and moves into the mold 10. For this reason, the skin facing material 1 is in a state where an appropriate tension is applied, so that the skin facing material 1 is prevented from being torn or wrinkled.
Next, the molten resin 2 is cooled and solidified. When the molten resin 2 is sufficiently cooled and solidified, the mold 10 is opened and the molded product is taken out. When the injection is completed, a plasticizing step for plasticizing the resin 2 for the next injection molding is started.
[0017]
According to the present embodiment as described above, the following effects are obtained.
That is, a plurality of fixing devices 20 corresponding to the amount of sliding required by the skin facing material 1 are provided separately from the mold 10, and when the molten resin 2 spreading in the mold pulls the skin facing material 1, Since the face material 1 is slid into the mold by the set slip amount before the face material 1 is pinched by the fixing device 20, an appropriate tension is applied to each part of the skin surface material 1, Even if the molded article has a complicated shape with irregularities, no wrinkles are generated on the surface, and the appearance of the molded article can be improved.
[0018]
Further, since the sliding members 21 and 22 having a small frictional resistance are provided in a portion of the fixing device 20 that comes into contact with the skin surface material 1, the tension required for the skin surface material 1 to slide out is limited to a small amount, and the paper surface is made of paper. Even if the skin surface material 1 has no strength and is easily broken, the skin surface material 1 can be prevented from being broken, and the appearance of the molded product can be improved from this point as well.
[0019]
Further, since the fixing device 20 is constituted by the sliding members 21 and 22 for sandwiching the skin facing material 1 and the pressing means such as the coil spring 27 for pushing the sliding member 21 toward the skin facing material 1, the mold 10 is formed. In addition to simplifying the entire structure, the mounting of the skin facing material 1 is such that when the mold 10 is closed, the temporarily fixed skin facing material 1 is sandwiched between the fixed mold portion 10A and the movable mold portion 10B. You can do it with simple tasks.
For this reason, the mounting work of the skin facing material 1 does not take much time, and the productivity can be improved without prolonging the molding cycle.
[0020]
Further, since the skin member 1 is sandwiched between the sliding members 21 and 22 having a small coefficient of friction, the double nut 26 for adjusting the pressing force of the coil spring 27 for pressing the sliding member 21 toward the skin member 1 is provided. The frictional force between the sliding members 21 and 22 and the skin surface material 1 can be finely adjusted, and when a large tension is required during molding, the frictional force can be increased. It is possible to mold from an easy soft skin material to a hard skin material, and it is possible to mold a good laminated molded article free from defects such as tears and wrinkles regardless of the type of skin material.
[0021]
Subsequently, effects of the present invention will be described based on specific experimental examples.
[Experimental example 1]
The first experimental example is an experiment in which a laminated molded product is formed based on the above-described example.
[Comparative Example 1]
Comparative Example 1 is an experiment in which a molded product similar to that of Experimental Example 1 was molded using a mold in which the fixing device 20 in the above-described example was omitted.
[Comparative Example 2]
In Comparative Example 2, the sliding members 21 and 22 of the fixing device 20 in the above-described embodiment were replaced with metal plates having a large friction coefficient, and the pressing force of the coil spring 27 was significantly increased. This is an experiment in which a molded product similar to that of Experimental Example 1 is to be molded using a mold in a state where no mold is generated.
In the above description, the mold is provided with two valve opening / closing gates, and the molten resin is filled into the mold from these gates.
[0022]
〔Molding〕
The molded product to be molded in Experimental Example 1 and Comparative Examples 1 and 2 is a door trim 30 as an interior panel of an automobile door. As shown in FIG. 5, the door trim 30 is provided with an armrest portion 31 and a pocket 32 for storing small items on its surface.
As for the dimensions of the door trim 30, the width W is 800 mm, the height H is 700 mm, and the thickness t is 2.5 mm.
In addition, in the part which becomes the pocket 32 of the skin facing material 1, a vinyl chloride lining sheet is temporarily attached to the back surface, and after molding, the small surface material 1 integrated with the resin portion is punched, so that small items are put therein. An opening of the space is formed.
[Common injection conditions]
In Experimental Example 1 and Comparative Examples 1 and 2, molding is performed using the same materials, equipment, and molding conditions as described below.
(1) Material As the synthetic resin constituting the molded article, polypropylene having a melt index MI of 55 g / 10 min (230 ° C., 2.16 kgf) (trade name: Idemitsu Polypro J-5050H, manufactured by Idemitsu Petrochemical Co., Ltd.) Is used.
As the skin surface material, a laminated sheet material having a thickness of 3.5 mm in which a skin layer made of a vinyl chloride resin having a thickness of 0.5 mm and a foamed material of polypropylene having a thickness of 3.0 mm are integrated. . On the surface of this skin facing material (a skin layer made of a vinyl chloride resin), a grain pattern imitating the surface of a cow skin or the like is provided.
(2) Molding device As the molding device, a general-purpose horizontal injection molding machine (screw diameter: 85 mm, maximum clamping force: 850 ton, manufactured by Mitsubishi Heavy Industries, Ltd.) with an injection compression molding mechanism is used.
(3) Molding conditions The following values are adopted as molding conditions.
(1) Molding temperature: 190 ° C
(2) Mold temperature: 30 ° C
(3) Injection pressure of resin: 90 kg / cm ² (gauge pressure)
(4) Injection time: 3 seconds (5) Compression start timing: 2.8 seconds after the start of injection (6) Die compression amount (dimension a): 30 mm
(7) Compression speed of movable mold part: 10 mm / sec (8) Compression force: 400 t
(9) Cooling time: 50 seconds
〔Experimental result〕
(1) The skin trim 1 of the door trim 30 obtained in Experimental Example 1 has no defects such as wrinkles and tears, and the foam of the skin trim 1 has a thickness of 2. in the flat portion of the door trim 30. 5 mm or more could be secured, and good cushioning properties could be maintained. From this, it can be seen that in Experimental Example 1, a molded article having good appearance quality was obtained.
(2) The door trim 30 obtained in Comparative Example 1 has a defect that wrinkles are generated at the base of the armrest portion 31 due to the bending of the skin facing material 1, and in Comparative Example 1, the appearance of the molded product is impaired. I understand.
(3) In the door trim 30 obtained in Comparative Example 2, the skin surface material 1 on the top of the armrest 31 was stretched, and the grain pattern on the surface of the skin surface material 1 was thinned and disappeared. Therefore, the door trim 30 of Comparative Example 2 cannot be used as a commercial product, and it can be seen that the appearance quality of Comparative Example 2 is significantly impaired.
Further, the foam of the skin facing material 1 on the top of the armrest 31 was crushed and disappeared, and the top of the armrest 31 lost the cushioning property.
[0024]
As described above, the present invention has been described with reference to the preferred embodiments and experimental examples, but the present invention is not limited to these examples and experimental examples, and various improvements and modifications can be made without departing from the gist of the present invention. Design changes are possible.
For example, the synthetic resin constituting the molded article is not limited to polypropylene, but may be other thermoplastic resins such as polyethylene, polystyrene, ABS, and polycarbonate, and talc, calcium carbonate, mica, and glass. What added a filler, such as a fiber, may be used.
[0025]
Further, the skin surface material is not limited to a laminated sheet material composed of a skin layer made of a vinyl chloride resin and a foam of polypropylene, and a cloth such as a woven fabric, a nonwoven fabric, and a knitted fabric, a foam of another thermoplastic resin, A thermoplastic resin face material, and a single-layer face material such as a film on which a pattern or the like is printed may be used, or a lining material made of a thermoplastic resin foam or the like may be used as a skin material such as a vinyl chloride resin or a thermoplastic elastomer. It may be a multi-layer surface material that is lined and different from the skin surface material.
[0026]
Further, the molded article is not limited to the interior panel of the door, but may be other automobile parts such as a seat back and a side pillar, and furniture parts such as a chair back.
[0027]
The pressing means for pressing the sliding means toward the skin material is not limited to a coil spring, but may be another type of spring, a pneumatic cylinder device, or a hydraulic cylinder device.
Further, the pressing force adjusting means for adjusting the pressing force of the coil spring is not limited to one in which a double nut is screwed into a bolt, but may be a servomotor or a hydraulic cylinder device for changing the compression amount of the coil spring.
[0028]
Further, the pressing force adjusting means for adjusting the pressing force of the coil spring can be omitted. At this time, several kinds of springs having different spring coefficients are prepared, and if a spring having a spring coefficient corresponding to the slip amount is selected and installed, a desired slip amount can be given to the skin surface material. it can.
Further, the sliding means is not limited to a member having a small coefficient of friction fixed to a portion in contact with the skin surface material, and is rotatably attached to a portion in contact with the skin surface material 1 as shown in FIG. A rolling device such as a roller 28 may be used.
[0029]
【The invention's effect】
As described above, according to the present invention, even in the case of a molded article having a complicated shape having irregularities, it is possible to improve productivity without causing defects such as wrinkles and tears on the surface.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a mold according to one embodiment of the present invention.
FIG. 2 is a plan view of a movable mold part of the mold of FIG.
FIG. 3 is an enlarged sectional view showing a main part of the embodiment.
FIG. 4 is a diagram for explaining a molding procedure of the embodiment.
FIG. 5 is a two-sided view showing a door trim which is a molded product of the experimental example.
FIG. 6 is a view similar to FIG. 3, showing a modification of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Skin surface material 2 Molten resin 10 Die 20 Fixing device 21 and 22 as fixing means Sliding member 23 as sliding means Coil spring 24 Bolt 26 which constitutes pressing force adjusting means Double nut 28 which constitutes pressing force adjusting means Sliding Roller 30 as a rolling device as a means Door trim as a laminated molded product

Claims (5)

A method for molding a laminated molded article, which is a method of molding a molded article in which a skin material having flexibility is attached to the surface,
A plurality of fixing means for slidably holding the skin surface material are provided in advance in a mold for molding the molded article, and the positions and numbers of these fixing means are determined in advance according to the shape of the molded article. Set according to the slip amount of each part of the set skin surface material,
The fixing means includes a sliding means for reducing frictional resistance with the skin surface material at a portion in contact with the skin surface material, and is fixed to a fixed mold and a moving mold which constitute the mold ,
After attaching the skin surface material to the mold by the fixing means, the molten resin is filled, and the molten resin inside the mold is spread while sliding the skin surface material held by the fixing means. A method for forming a laminated molded product. 2. The method according to claim 1, wherein the fixing unit adjusts a clamping force for clamping the surface material to a predetermined magnitude before molding. 3. Molding method. 2. The method according to claim 1, wherein the molten resin is compressed by mold clamping of the mold and spread inside the mold. . A mold of a laminated molded product for molding a molded product having a skin surface material having flexibility attached to the surface,
The mold has a spigot structure, and a plurality of fixing means for slidably holding the skin surface material are provided in the mold at a distance from each other,
The fixing means is fixed to the fixed die and movable die for forming the mold, and comprising a sliding means for reducing the frictional resistance between the skin surface material to the skin surface member abutting portion, the The mold for a laminated molded product, wherein the sliding means is a rolling device rotatably attached to a portion of the fixing means which comes into contact with the skin material. A mold of a laminated molded product for molding a molded product having a flexible skin material adhered to the surface thereof,
The mold has a spigot structure, and a plurality of fixing means for slidably holding the skin surface material are provided in the mold at a distance from each other,
The fixing means is fixed to the fixed die and movable die for forming the mold, and a slide means for reducing the frictional resistance between the skin surface material to the skin surface member abutting portion, the slip A coil spring for pressing the means toward the skin material; and a pressing force adjusting means which can be fixed at an arbitrary position in the displacement direction of the coil spring and adjusts the pressing force of the coil spring. A mold for a laminated molded product, characterized in that:

Images