JPH07195372A - Skin integrating molding method and apparatus - Google Patents

Abstract

PURPOSE:To apply good appearance to the terminal part of a molded article having a skin, to improve working environment by dispensing with the use of an adhesive, to enhance working efficiency by dispensing with post treatment after molding, to eliminate the possibility of the peeling of a skin material and to select a synthetic resin material becoming the skin material or a base material regardless of the properties thereof. CONSTITUTION:In a skin integrating molding apparatus wherein a cavity C is formed by opposed first and second molds 10,20 and a skin material is arranged between the first and second molds 10,20 and a synthetic resin becoming a base material is supplied to the gap between the skin material and one mold to be pressed and cooled to form a multilayered molded product wherein the skin material is integrally bonded to the surface of the base material, a pin 22 capable of protruding into the cavity is arranged in the second mold 20 in a slidable manner and a projection 12 protrudes into the cavity from the second mold at the position inside from the arranging position of the pin 10 of the first mold 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a multi-layer molded article in which various surface materials are attached to the surface of a base material layer made of a thermoplastic resin, and is particularly preferably applied to interior materials for automobiles. The present invention relates to a method for integrally forming a skin and a device therefor.

[0002]

2. Description of the Related Art Generally, automobile interior parts are often composed of a multi-layer molded article in which various surface materials are laminated on the surface of a base material layer made of a thermoplastic resin. In order to prevent the peeling of the skin material because the appearance is particularly important in terms of the character of the product, the terminal portion 102 of the skin material H is placed at a predetermined position as shown in FIGS. 16 (A) and 16 (B). It was cut by the above method, folded back to the back side of the base material 101, adhered with an adhesive or the like, or joined by stapling or the like to maintain the appearance as a product and prevent the peeling of the skin material.

[0003]

However, from the viewpoint of manufacturing efficiency and work environment, it is troublesome in terms of man-hours, and the organic solvent is not used (that is, the adhesive is not used). It is desired to carry out efficiently. Further, depending on the combination of the material of the skin material and the material of the base material, the adhesion may be difficult, so that it is impossible to select the desired material.

The object of the present invention is to give a good appearance to the end portion of a molded article having a skin, improve the working environment by eliminating the use of an adhesive, and improve the working efficiency by eliminating the post-treatment after molding. Provided is a method and apparatus for integrally forming a skin, which can increase the amount of the skin material and can prevent the skin material from peeling off, and can select the material of the synthetic resin as the skin material or the base material regardless of its adhesiveness and the like. Especially.

[0005]

According to a method for integrally forming a skin according to claim 1 of the present application, a cavity is formed between a first mold and a second mold which face each other, and a cavity is formed between the first mold and the second mold. A multi-layered product in which a skin material is placed on the base material, a synthetic resin serving as a base material is supplied between the skin material and one of the molds, and the surface material is integrally bonded to the surface of the base material by applying pressure and cooling. In the method of integrally forming a skin to be formed, after disposing a skin material between the first mold and the second mold, the edges of the first mold and the second mold are engaged with each other so that the skin ends are formed in both molds. In the step of cutting with, a synthetic resin is injected between the skin material and the mold, and the skin terminal cut and positioned in the mold is pierced with a pin protruding from one of the molds into the cavity. And the second mold is clamped to perform compression molding, and the pin is retracted from the cavity. And step, characterized in that it comprises a.

The integrated skin forming apparatus according to claim 2 of the present application is
A cavity is formed between the first mold and the second mold facing each other, and a skin material is arranged between the first mold and the second mold, and a base material is provided between the skin material and one mold. A synthetic resin molding apparatus for supplying a synthetic resin, pressurizing and cooling the same to form a multi-layered product in which a skin material is integrally bonded to the surface of a base material. A pin capable of projecting into the cavity is slidably disposed, and a protrusion is provided inside the cavity at a position inside the position of the die pin facing the die having the pin projectable. It is characterized by protruding to.

A method for integrally forming a skin according to claim 3 of the present application is
A cavity is formed between the first mold and the second mold facing each other, and a skin material is arranged between the first mold and the second mold, and a base material is provided between the skin material and one mold. In the method for integrally forming a skin, the synthetic resin is supplied, pressurized and cooled to form a multi-layer formed product in which the skin material is integrally joined to the surface of the base material, and the skin is provided between the first mold and the second mold. After placing the material, the first mold and the second
A step of cutting the skin end with both molds by engaging the edges of the mold, and injecting a synthetic resin between the back surface of the skin material and the mold and cutting the skin end located in the mold A first compression molding step in which a pin is protruded from one mold into the cavity and a skin end is pierced and penetrated, and the first mold and the second mold are clamped to perform compression molding; A step of retreating and injecting a synthetic resin from the hole formed by the retreat of the pin to supply the resin to the surface side of the skin material terminal, and a second compression molding in which the synthetic resin supplied to the skin material terminal is again compression molded. And a process.

The integrated skin forming apparatus according to claim 4 of the present application is
A cavity is formed between the first mold and the second mold facing each other, and a skin material is arranged between the first mold and the second mold, and a base material is provided between the skin material and one mold. A synthetic resin molding apparatus for supplying a synthetic resin, pressurizing and cooling the same to form a multi-layered product in which a skin material is integrally bonded to the surface of a base material. A pin capable of projecting into the cavity is slidably arranged, an injection nozzle using the pin as a shut-off valve is connected to the sliding hole of the pin, and the gold is provided so that the pin can project. A third movable mold having a pin protruding space and a terminal-shaped recess is formed in the mold facing the mold.

The apparatus for integrally forming a skin according to claim 5 of the present application is
A cavity is formed between the first mold and the second mold facing each other, and a skin material is arranged between the first mold and the second mold, and a base material is provided between the skin material and one mold. A synthetic resin molding apparatus for supplying a synthetic resin, pressurizing and cooling the same to form a multi-layered product in which a skin material is integrally bonded to the surface of a base material. It is characterized in that a concave portion deeper than the inner position of the predetermined portion of the end portion is formed, and the concave portion is formed with a protruding portion protruding into the cavity.

[0010]

According to the first aspect of the present invention, the step of cutting the skin terminal with a mold, the step of projecting the pin from one mold into the cavity and piercing the skin terminal and penetrating, the mold clamping And the step of retracting the pin from the inside of the cavity is performed, and the cut skin end is punched by the pin. Then, when the molds are clamped, the molten synthetic resin flows out from this hole to the surface side of the skin material, and the skin material is embedded in the synthetic resin at the terminal portion, so that a bead-shaped terminal is formed.

According to the second aspect of the present invention, since one of the molds is provided with a pin slidably disposed at a predetermined position on the end side so as to project into the cavity, the pin is used as a skin. The material is pierced and penetrated to make a hole. Then, since the protrusions project into the cavity in the mold facing the mold in which the pins are arranged, when the mold material is clamped and the skin material and the synthetic resin supplied to the back surface of the skin are compression-molded, the skin The material end is pushed by the protrusion and embedded in the synthetic resin, and a bead-shaped end is formed in which the boundary line with the skin material part is beautifully provided in the appearance of the product.

According to the third and fourth aspects of the present invention, the synthetic resin is injected from the hole formed by the retreat of the pin after cutting the skin material, and the resin is supplied to the front surface side of the skin material terminal to form the skin. The second compression molding step of recompressing the synthetic resin supplied to the material end is performed, so that the surface side of the skin material end is surely covered with the resin to form the bead-shaped end. Further, since the molten synthetic resin is supplied separately, only the terminal portion can be made of a synthetic resin different in material from the synthetic resin serving as the base material, and the appearance can be further improved.

According to the fifth aspect of the present invention, since the concave portion is formed in the mold at a predetermined position on the end portion side, and the concave portion is formed with the projecting portion projecting into the cavity, the skin material terminal is projected. Even if the tip end of the portion pushes the inside of the cavity and the synthetic resin as the base material is pressed and filled, the end of the skin material is embedded in the resin and a bead-shaped end is formed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The members, arrangements, and the like described below do not limit the present invention and can be variously modified within the scope of the gist of the present invention.

Materials for the skin material used in the present invention include thermoplastic resins such as woven cloth, non-woven cloth, polyolefin, vinyl chloride and nylon, and thermoplastic elastomers such as polyolefin series, polyester series, urethane series and vinyl chloride series. Examples include sheets and films. Further, the above materials may be used alone or as a laminate of two or more kinds as a skin material.

In order to give a softer feeling, a foamed sheet of polypropylene, polyethylene, urethane or the like is attached to the back surface of the skin material, which is protected from the heat of the molten resin at the time of molding, and the skin material and the core material layer. For the purpose of strengthening the adhesive force, it is also possible to use a laminate in which a cloth, a sheet or the like is attached to the back surface. When using these skin materials, preheating may be performed prior to the supply in order to adjust the tensile stress and elongation of the skin material.

The resin used as the substrate in the present invention is
For example, polypropylene, polyethylene, polystyrene, acrylonitrile-styrene-butadiene copolymer, thermoplastic resin such as nylon, ethylene-propylene block copolymer, thermoplastic elastomer such as styrene-butadiene block copolymer, compression molding, injection molding Any of those usually used for extrusion molding can be used. Further, those containing additives such as an inorganic filler, a filler such as glass fiber, a pigment, a lubricant, an antistatic agent and the like can be appropriately used.

1 to 3 illustrate the invention according to claims 1 and 2, FIG. 1 is an explanatory partial sectional view of a state in which a skin material is cut, and FIG. 2 is an explanatory part in a resin injection step. Sectional drawing, FIG. 3 is an explanatory partial sectional view of the compression molding step.

Embodiments according to claims 1 and 2 of the present application will be described with reference to FIGS. 1 to 3. In the integrated skin forming apparatus S1 of this example, a cavity C is formed by the first mold 10 and the second mold 20 that face each other.

Although the first mold 10 and the second mold 20 are arranged vertically in this example, it goes without saying that they may be arranged horizontally. A skin material H is disposed between the first mold 10 and the second mold 20, and a synthetic resin serving as a base material is provided between the skin material H and one mold (the second mold 20 in this example). Is supplied, pressurized and cooled to form a multi-layered article in which the surface material is integrally joined to the surface of the base material.

The second mold 20 is provided with a pin 22 slidable at a predetermined position on the side of the end portion of the cavity C so as to project into the cavity C by a driving device (not shown).
The pin 22 has a tip portion 23 that is sharpened like a needle so that the end of the skin material H can be pierced and penetrated.

The first mold 10 facing the second mold 20 is provided with a protrusion 12 projecting into the cavity C at a position inside the cavity C as compared with the position where the pin 22 is arranged. . Of the cavity surface forming the cavity C of the first mold 10, at least the cavity surface region 13 outside the protrusions 12 has a satin-like surface state called drawing which is often used for the inner surface of the resin molding die. It is preferable to set it.

Next, the operation of this example will be described. First, a first mold 10 and a second mold 20 (not shown) in a mold opened state.
A skin material H is placed between the two and the mold is clamped. As shown in FIG. 1, the edge portion 11 of the first die 10 and the edge portion 21 of the second die 20 mesh with each other, and the clearance is 0, so that the skin end is cut. The pin 22 is projected into the cavity C at the cut end of the epidermis located in the mold, and the end of the epidermis H is pierced and penetrated by the needle-like tip 23 of the pin 22.

Next, as shown in FIG. 2, the skin material H and the second die 2
Molten synthetic resin J heated and melted during 0 is injected from a supply gate (not shown) provided on the cavity surface of the second mold 20. At this time, the end of the skin material H is pierced by the pin 22, and the skin material H is prevented from being pulled inward in the cavity C due to shrinkage of the skin material due to the influence of the heat of the molten synthetic resin J.

Then, as shown in FIG. 3, the first mold 10 and the second mold 20 are clamped to perform compression molding, and the pin 22 is retracted from the inside of the cavity. A hole 24 opened by the tip 23 of the pin 22 remains at the end of the skin material, and the molten resin J compressed and clamped through the hole 24 flows into the surface of the skin material at the end of the skin material.

Further, the projection 12 has a function of pushing down the skin material from the cavity surface and embedding it in the resin, and forms a boundary line between the portion of the molded product having the skin material on its surface and the beaded resin portion. After the compression molding, the synthetic resin J is left to cool and harden, and after hardening, the mold is opened and the molded product is taken out.

As shown in FIG. 8, the molded product has a molded product end portion 90 in which the end of the skin material H is embedded in the resin of the bead portion 91. The beaded portion 91 of the molded product end portion 90 faithfully reproduces the shape of the drawn surface 13 of the inner surface of the first die 10, and the portion having the skin material on the surface and the beaded portion 91.
The boundary line of was clearly displayed, and it was very good-looking.

Further, since the end of the skin material H is embedded in the resin at the same time as molding, there is no concern that the skin material will peel off during use as a product, and the conventional post-treatment of the end portion becomes unnecessary, so that work can be performed. Adhesives can be expelled from the environment, streamlining work processes and reducing costs.

4 to 8 are for explaining the invention according to claims 3 and 4, FIG. 4 is an explanatory partial sectional view showing a state in which a skin material is arranged, and FIG. 5 shows a first compression molding step. 6 is a partial cross-sectional view for explaining the state when the resin is injected into the terminal surface side of the skin material, FIG. 7 is a partial cross-sectional view for explaining the second compression molding step, and FIG. It is a principal part sectional drawing of a terminal part.

Embodiments according to claims 3 and 4 of the present application will be described with reference to FIGS. 4 to 8. As shown in FIG. 4, the integral molding apparatus of this example has a first mold 30 and a second mold 30 facing each other.
The first mold, which is composed of the mold 40 and is movable with respect to the second mold 40 on the fixed side, is moved and clamped to form the cavity C. At the time of formation, a skin material H is arranged between the first mold 30 and the second mold 40, and a synthetic resin J1 serving as a base material is supplied between the skin material H and the second mold 40 to apply pressure, It is cooled to form a multi-layered article in which the surface material is integrally joined to the surface of the base material.

In the second mold 40, a pin 42 which can project into the cavity C is disposed at a predetermined position on the mold end side so as to be slidable by a driving means (not shown). The tip 43 of the pin 42 has a needle shape so that the end of the skin material H can be easily penetrated and penetrated.

An injection nozzle 44, which uses the pin as a shut-off valve, is connected to the sliding hole 45 of the pin, and when the pin 42 is raised or at a predetermined position of the mold 40, the sliding hole 45 and the injection nozzle 44 are shut off. The injection nozzle 44 and the sliding hole 45 communicate with each other when the pin 42 is lowered. The injection nozzle 44 is connected to a compression molding machine or an injection molding machine (not shown) so that the molten resin J2 can be supplied.

The first mold 30 facing the second mold 40 in which the pins 42 are arranged has a third movable mold 32 (hereinafter referred to as a core) provided with a pin projecting space and a terminal-shaped recess 34. The core 32 is vertically slidable by a connecting member 33 to a driving device (not shown). The inner surface of the recess 34 of the core is drawn.

Further, the edge 31 of the first die 30 and the second die 4
The edge portion 41 of 0 meshes with the clearance 0 when the mold is clamped, and it is possible to cut the end of the epidermis provided when the mold is clamped.

Next, the method for integrally forming the skin of this example will be described. In this example, the cavity C is formed by the first mold 30 and the second mold 40 facing each other, and the skin material H is disposed between the first mold 30 and the second mold 40. And the second mold 4
In this method, the molten synthetic resin J1 serving as a base material is supplied between 0 and 0 to pressurize and cool to form a multi-layer formed product in which the surface material is integrally joined to the surface of the base material to form a multilayered article.

First, a skin material H is disposed between the first mold 30 and the second mold 40 in a mold open state (not shown). At this time, the skin material H may be held by a frame (not shown) or may be held in the mold by means such as vacuum. Then, as shown in FIG. 4, the first mold 30 and the second mold 40 are brought close to each other, and the edges 31 and 41 of the respective molds are engaged with each other to cut the end of the skin H.

Then, a pin 42 having a needle-like tip portion 43 is projected from the second mold 40 into the cavity C at the end of the skin material H cut in the above step and positioned in the mold to form the skin end. Stick and pierce. The pin 42 protruding and penetrating the skin material H is held in a state of penetrating the skin material H. Before and after this, the molten synthetic resin J1 heated and melted between the back surface of the skin material H and the second mold 40 is introduced into the cavity of the second mold 40 from a compression molding machine or an injection molding machine (not shown). Injection and supply are started through a gate (not shown) provided in the above.

In the present invention, the molten synthetic resin is supplied with the end of the skin material H being pierced by the pin 22.
Due to the presence of the pin 42, the hole penetrating the skin material H is closed to form a hole for the synthetic resin J1 necessary for the subsequent process, and the skin material shrinks due to the heat of the supplied molten synthetic resin J. Prevents the skin material H from being drawn inward of the cavity C.

Thereafter, as shown in FIG. 5, the first mold 30 and the second mold 30
The die 40 is clamped and the skin material H and the molten synthetic resin J1 are compression molded (first compression molding step). At this time, the pin 42 remains protruding and closes the hole formed in the skin material H as described above, so that the synthetic resin J1 flows out to the surface side of the skin material H during the first compression molding step. There is no such thing. Further, the core 32 descends as it enters the cavity,
The skin material is supported so as to make a gap between the skin material H and the synthetic resin J1 at the edge of the cavity. In this state, it is held until the synthetic resin J1 is cured to some extent.

After the synthetic resin J1 is cured to some extent, the pin 42 and the core 32 are retracted from the inside of the cavity. Skin material H and synthetic resin J1 molded in the first compression molding step
At the edge of the cavity, a space for projecting the pin of the core 32 and a space for the terminal-shaped concave portion 34 are generated, and a hole is formed by retreating the pin 42.

When the pin 42 is further retracted as shown in FIG. 6, the injection nozzle 4 for supplying the molten resin J2 with the pin 42 as a shut-off valve into the sliding hole 45 of the pin 42.
4 is connected, the sliding hole 45 and the injection nozzle 44 are connected.

Therefore, the injection nozzle 44 in the connected state
The molten resin J2 enters the sliding hole 45 of the pin 42 from
Further, as the pin 42 retracts, the molten resin J2 enters into the holes formed in the synthetic resin J1 and the skin material H. Molten synthetic resin J
2 passes through these holes and is supplied to the surface side of the skin material terminal. The synthetic resin J2 supplied here can be the same as the synthetic resin J1 supplied in the previous step, but it can be appropriately selected according to the requirement and is not necessarily the same as the resin J1.

After the synthetic resin J2 is supplied, the end of the skin material can be embedded in the resin by lowering and compressing the core 32 as shown in FIG. 7 (second compression step). As described above, according to this example, as shown in FIG. 8, the bead-shaped terminal 91 is formed by reliably covering the surface side of the terminal of the skin material H with the resin.

The bead 91 of the molded product end portion 90 faithfully reproduces the drawn surface shape of the inner surface of the concave portion 34 of the core 32, and the molten synthetic resin is separately supplied. A synthetic resin different from the synthetic resin used as the material can be used, and the appearance is further improved.

Further, since the end of the skin material H is embedded in the resin at the same time as molding, there is no fear that the skin material will be peeled off during use as a product, and the conventional post-treatment of the end portion becomes unnecessary, so that work can be performed. Adhesives can be expelled from the environment, streamlining work processes and reducing costs.

9 to 15 are for explaining the invention according to claim 5, FIG. 9 is a partial sectional view of the mold, FIGS. 10 to 12 are partial sectional views for explaining the operation, and FIG. 13 is a molding. FIG. 14 is a perspective view of a main part of a terminal part of a molded product, FIG. 14 is a perspective view of a main part of a terminal part of a molded product, and FIG. 15 is a partial cross-sectional view of a mold showing another example of the invention according to claim 5.

The integrated skin forming apparatus S3 of this embodiment is provided with a first die 50 and a second die 6 which are opposed to each other as shown in FIGS. 9 and 10.
A cavity C is formed with 0. Although the first mold 50 and the second mold 60 are arranged vertically in this example, it goes without saying that they may be arranged horizontally. And the first mold 50
A skin material H is disposed between the second mold 60 and the second mold 60, and a synthetic resin serving as a base material is supplied between the skin material H and one mold (the second mold 20 in this example) to apply pressure. Then, it is cooled to form a multi-layered article in which the surface material is integrally joined to the surface of the base material.

The second mold 60 is provided with a compression molding machine or an injection molding machine (not shown), and is melt-synthesized from the compression molding machine or the injection molding machine through a gate (not shown) provided in the cavity of the second mold 60. It is configured so that resin can be injected and supplied.

In the first mold 50 facing the second mold 60, a recess 52 deeper than the inside position of the cavity is formed at a predetermined position on the end side of the cavity C, and the inside of the recess projects into the cavity. The protruding pin 53 is formed. The projecting pin 53 is replaceable, and the projecting amount can be adjusted according to the material of the skin material H or the synthetic resin as the base material. Further, the inner surface of the recess 52 may be drawn. The size of the recess 52 and the size of the protruding pin 53 can be appropriately selected according to the specifications of the material and the product, but the width of the recess is 5 to 10
mm, and the diameter of the pin is preferably about 2 to 5 mm.

The first mold 50 is a movable mold and the second mold 60 is a movable mold. The second mold 60 is constructed so that it can be moved relative to the first mold 50 and clamped. At the time of mold clamping, the edge 51 of the first mold 50 and the edge 61 of the second mold 60 mesh with each other with zero clearance, and the skin material H can be cut when sandwiched.

Next, the operation of this example will be described. First, a first mold 50 and a second mold 60, which are not shown in the figure and are in a mold opened state.
A skin material H is placed between the two and the mold is clamped. As shown in FIG. 10, an edge portion 51 of the first die 50 and an edge portion 61 of the second die 60.
Meshes with each other and the clearance is 0, so that the skin terminal is cut.

When the mold is tightened as it is, it is cut as shown in FIG. 11 and the protruding pin 53 is attached to the skin end located in the mold.
Abut and push the skin material H into the cavity C. Next, the molten synthetic resin J heated and melted between the skin material H and the second mold 60 is injected from a supply gate (not shown) provided on the cavity surface of the second mold 60. At this time, the end of the skin material H is extruded into the cavity by being separated from the surface of the recess 52 at the edge of the cavity of the first mold 50 by the protruding pin 53, and the supplied synthetic resin J is extruded by the extruding pin 53. Flows under the back of the skin material.

Then, as shown in FIG. 12, the first die 50 and the second die 50
When the mold 60 is clamped and compression-molded, the end of the skin material is extruded into the cavity by the tip 23 of the protruding pin 53, so that the end 81 of the molded product 80 shown in FIGS. It is embedded in the resin and the terminal 81
Has a beaded shape and has a good appearance. In addition, since the end of the skin material H is embedded in the resin at the same time as molding, there is no concern that the skin material will peel off during use as a product.
It eliminates the need for terminal post-treatment as in the past and allows the adhesive to be expelled from the work environment, streamlining the work process and reducing costs.

As shown in FIG. 15, the protruding portion 55 can be used in place of the protruding pin 53, and can be appropriately selected according to the desired appearance of the molded product.

[0055]

According to the invention of claim 1 of the present application, a step of cutting the skin terminal with a mold, a step of projecting a pin from one mold into the cavity and piercing the skin terminal, and penetrating the skin terminal. Since the step of clamping and compression molding and retracting the pin from the inside of the cavity is provided, the cut skin end is punched by the pin. Then, when the molds are clamped, the molten synthetic resin flows out from this hole to the surface side of the skin material, and the skin material is embedded in the synthetic resin at the terminal portion to form a bead-shaped terminal.

According to the second aspect of the present invention, since one of the molds has a pin slidably disposed at a predetermined position on the end side so as to project into the cavity, the pin is used as a skin. The material is pierced and penetrated to make a hole. Then, since the protrusions project into the cavity in the mold facing the mold in which the pins are arranged, when the mold material is clamped and the skin material and the synthetic resin supplied to the back surface of the skin are compression-molded, the skin The material end is pushed by the protrusion and embedded in the synthetic resin, and a bead-shaped end is formed in which the boundary line with the skin material part is beautifully provided in the appearance of the product.

According to the third and fourth aspects of the present invention, the synthetic resin is injected from the hole formed by the retreat of the pin after the cut of the skin material, and the resin is supplied to the surface side of the skin material end, The second compression molding step of recompressing the synthetic resin supplied to the material end is performed, so that the surface side of the skin material end is surely covered with the resin to form the bead-shaped end. Further, since the molten synthetic resin is supplied separately, only the terminal portion can be made of a synthetic resin different in material from the synthetic resin serving as the base material, and the appearance can be further improved.

According to the fifth aspect of the present invention, since the concave portion is formed in the mold at the predetermined position on the end side and the concave portion is formed with the projecting portion projecting into the cavity, the skin material terminal is projected. Even if the tip end of the portion pushes the inside of the cavity and the synthetic resin as the base material is pressed and filled, the end of the skin material is embedded in the resin and a bead-shaped end is formed.

As described above, according to the present invention, the end portion of a molded product having a skin is provided with a good appearance, the use of an adhesive is eliminated, the working environment is improved, and the post-treatment after molding is unnecessary. Work efficiency can be improved, and there is no fear of peeling of the skin material, and the material of the synthetic resin used as the skin material or the base material can be selected regardless of its adhesiveness. You can freely use excellent materials.

[Brief description of drawings]

FIG. 1 is an explanatory partial cross-sectional view of a state in which a skin material of the invention according to claim 1 and claim 2 is cut.

FIG. 2 is an explanatory partial cross-sectional view in a resin injection step.

FIG. 3 is an explanatory partial cross-sectional view of a compression molding process.

FIG. 4 is an explanatory partial cross-sectional view of a state in which a skin material of the invention according to claims 3 and 4 is arranged.

FIG. 5 is a partial cross-sectional view illustrating a first compression molding step.

FIG. 6 is an explanatory partial cross-sectional view of a state when a resin is injected into the end surface side of the skin material.

FIG. 7 is a partial cross-sectional view illustrating a second compression molding process.

FIG. 8 is a cross-sectional view of a main part of a terminal portion of a molded product.

FIG. 9 is a partial cross-sectional view of a mold of the invention according to claim 5;

FIG. 10 is a partial cross-sectional view illustrating the operation of the invention according to claim 5.

FIG. 11 is a partial cross-sectional view explaining the operation of the invention according to claim 5.

FIG. 12 is a partial cross-sectional view explaining the operation of the invention according to claim 5.

FIG. 13 is a cross-sectional view of a main part of a terminal portion of a molded product.

FIG. 14 is a perspective view of an essential part of a terminal portion of a molded product.

FIG. 15 is a partial cross-sectional view of a mold showing another example of the invention according to claim 5; .

FIG. 16 is a sectional view of a product terminal portion showing a conventional example.

[Explanation of symbols]

 10, 30, 50 First mold 11, 31, 51 Mold edge 12 Projection 20, 40, 60 Second mold 21, 41, 61 Mold edge 22, 42 Pin 3 Second mold 32 Movable Core 34 Recess 44 Injection nozzle 53 Projection pin 55 Projection C Cavity S, S2, S3 Molding device H Skin material J, J1, J2 Synthetic resin

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B29C 59/00 F 9446-4F // B29L 9:00 31:58

Claims (5)

[Claims] 1. A cavity is formed between a first mold and a second mold that face each other, and a skin material is disposed between the first mold and the second mold, and the skin material and one of the molds are arranged. In a method of integrally forming a skin, a synthetic resin as a base material is supplied in between, pressurized and cooled to form a multi-layer formed article in which a surface material is integrally joined to the surface of the base material, wherein a first mold and a second mold are used. After disposing a skin material between the molds, a step of engaging the edges of the first mold and the second mold to cut the skin end with both molds, and synthesizing between the skin material and the mold A step of injecting a resin and cutting the skin to locate the skin end in the mold, projecting a pin from one mold into the cavity and piercing the skin end, and penetrating the skin end;
And a step of retracting the pin from the inside of the cavity by clamping the mold and compression molding. 2. A cavity is formed between the first mold and the second mold which are opposed to each other, and a skin material is disposed between the first mold and the second mold, and the skin material and one of the molds are arranged. In a skin-integrated molding device that supplies a synthetic resin serving as a base material between them and pressurizes and cools it to form a multi-layer formed product in which a skin material is integrally bonded to the surface of the base material, one of the molds has an end. A pin capable of projecting into the cavity is slidably arranged at a predetermined position on the part side,
A skin-integrated molding apparatus, wherein a projection portion projects into the cavity at a position inside a position of the pin of the mold facing the mold in which the pin is arranged to project. 3. A cavity is formed between the first mold and the second mold facing each other, and a skin material is disposed between the first mold and the second mold, and the skin material and one of the molds are separated from each other. In a method of integrally forming a skin, a synthetic resin as a base material is supplied in between, pressurized and cooled to form a multi-layer formed article in which a surface material is integrally joined to the surface of the base material, wherein a first mold and a second mold are used. A step of disposing a skin material between the molds and then engaging the edges of the first mold and the second mold to cut the skin end with both molds; and between the back surface of the skin material and the mold. Synthetic resin is injected into and cut into the skin end located in the mold. A pin is projected from one mold into the cavity to pierce the skin end and penetrate the first mold and the second mold. The first compression molding step of clamping and compression molding, and the hole formed by retracting the pin from the cavity and retracting the pin. And a second compression molding step of re-compressing the synthetic resin supplied to the skin material end, and a step of injecting a synthetic resin from the end to supply the resin to the surface side of the skin material end. A method for integrally forming a skin. 4. A cavity is formed between the first mold and the second mold that are opposed to each other, and a skin material is disposed between the first mold and the second mold, and the skin material and one of the molds are arranged. In a skin-integrated molding device that supplies a synthetic resin serving as a base material between them and pressurizes and cools it to form a multi-layer formed product in which a skin material is integrally bonded to the surface of the base material, one of the molds has an end. A pin capable of projecting into the cavity is slidably arranged at a predetermined position on the part side,
An injection nozzle using a pin as a shut-off valve is connected to the sliding hole of the pin, and the die facing the die in which the pin is projectable is provided with a pin protruding space and a terminal-shaped recess. An apparatus for integrally forming a skin, wherein a third movable mold is formed. 5. A cavity is formed between the first mold and the second mold which are opposed to each other, and a skin material is disposed between the first mold and the second mold, and the skin material and one of the molds are separated from each other. In a skin-integrated molding device that supplies a synthetic resin serving as a base material between them and pressurizes and cools it to form a multi-layer formed product in which a skin material is integrally bonded to the surface of the base material, one of the molds has an end. A skin-integrated molding apparatus, characterized in that a recessed portion deeper than the inner position of a predetermined end portion is formed at a predetermined position on the part side, and a protrusion protruding into the cavity is formed in the recessed part.