JPS6211657B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Field of the Invention>> The present invention is characterized in that, at the same time as the core material is formed, a skin is attached onto the formed core material, and the outer periphery of the skin is trimmed to a size large enough to accommodate the rolling margin. This invention relates to a method of forming a laminated molded product.

≪Prior art and its problems≫ For example, in automotive interior parts, a laminated molded product is generally used in which a skin material is pasted on the surface of a molded core material, and the wrapping margin around the periphery is rolled up to the back side. It is true.

Conventionally, the method for producing molded products by bonding has been to first press-form a board core material, which is a material constituting the core material, and then trim-cut the periphery.Then, this molded core material is placed in a vacuum mold. After setting the skin sheet on the surface and vacuum pasting the skin sheet to the surface and pasting it together, this skin sheet is cut along the outer periphery of the core material to a size large enough to cover the back surface, and then,
This rolling margin was rolled up and glued to complete the product.

However, the above manufacturing method requires two types of press molding molds and a vacuum molding mold for lamination, which increases the number of man-hours, and it cannot be applied to products with breathable skin sheets. The cutting of the skin sheet after pasting was done manually using scissors or the like, which resulted in unstable work and large errors in shape.

≪Object of the Invention≫ The present invention particularly provides a method for forming a laminated molded product using a material such as cloth, carpet, etc. as a skin material, and involves the use of one mold and one molding step. It is an object of the present invention to simultaneously perform the forming of the core material, the adhesion of the skin material, and the trim cutting including the rolling margin around the outer periphery.

≪Structure and Effects of the Invention≫ In order to achieve the above object, the method for forming a laminated molded product according to the present invention involves forming a desired molded product mold surface using a resin core material that has been preheated and plasticized. Set the skin material on the lower mold, place the skin material on the core material, fix the periphery of the part protruding from the periphery of the lower mold with a clamp tool, and lower the upper mold with respect to the lower mold. The core material, which is flexibly deformed along the mold surface of the lower mold, is crushed by a holder provided along the periphery of the lower mold and a pusher provided along the periphery of the upper mold. A press rod is lowered between the peripheral edges of both molds and the clamped fixed part, and tension is applied and stretched to reduce the thickness of the resin core material, and then the upper mold is lowered together with the press rod. Then, the skin material and the core material are integrally press-molded using the upper and lower dies, and at the same time, the core material is cut using the pedestals and push-up stands on the periphery of both dies, and the core material and the skin material are pressed together using the pressing rod. By cutting both the core material and the skin material, the core material and the skin material are each cut into desired outer peripheral shapes.

That is, in the method of molding a laminated molded product according to the present invention, molding is performed in a compression mold with the skin material placed on the heated thermoplastic resin core material as described above, and By stretching the peripheral resin core material that protrudes from the mold to make it thinner, cutting the core material, and at the same time cutting the skin material larger than this, it is possible to perform integral molding and at the same time trim the back side wrapping allowance. Compared to the conventional adhesive processing method, it is
The molding cycle can be lowered in one step using two molds, which shortens the molding cycle, and after that, the product is completed by simply wrapping the back side of the skin material, making manufacturing easy and allowing for high-precision finishing. It has various effects such as.

<<Description of Embodiment>> An embodiment of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 schematically show a molding apparatus for carrying out the present invention.

The device in the figure is a backup plate 1.
A movable plate 3 is installed facing the backup plate 1 so as to be movable up and down, and an upper mold 4 is fixed to the lower surface of the movable plate 3.

A pedestal 5 is provided on the outer surface of the lower mold 2 to integrally surround it, and a pusher 6 is similarly formed on the outer periphery of the upper mold 4. Both molds 2,
When 4 is engaged, the pusher 6 comes into contact with the holder, and a cavity with the required clear sense d is formed between the mold surfaces 2a and 4a of both molds 2 and 4, as shown in FIG. It's getting old. Furthermore, the above-mentioned cradle 5
The abutment surfaces of the pusher base 6 and the pusher base 6 are flat parts 6a and 6a, respectively.
The convex portion 5a is formed and a pinch-off portion (cut-off) is formed.
, and its outer periphery is inclined outward toward the bottom.

Further, on the outer circumferential portion of the lower mold 2, on the back-up plate 1 there is provided a ring which surrounds the lower mold 2 in an annular manner at a height approximately the same as the periphery of the mold surface 2a of the lower mold 2.
A fixed clamp block 7 is provided, and at an intermediate position between the fixed clamp block 7 and the lower mold 2, a fixed cutting blade 8 is provided on the back-up plate 1, also oriented around the outer periphery of the lower mold 2. The cutting blade 8 is erected with its cutting edge 8a facing upward, and the height of the cutting blade 8 is set considerably lower than the periphery of the clamp block 7 and the mold surface 2a.

On the other hand, a support rod 9 is provided on the lower surface of the movable plate 3 in order to surround the outer periphery of the upper die 4 in an annular manner.
A movable clamp block 9 is vertically installed via a,
A pressing rod 10 having a double-acting portion 10a is vertically provided at an intermediate position between the upper die 4 and the movable clamp block 9.

As the movable plate 3 descends, the movable clamp block 9 first comes into contact with the upper surface of the fixed clamp block 7, and performs a clamping action between the two. In order to stop at this point, the support rod 9a is slidably pivoted to the movable plate 3, and a compression coil spring 9b is inserted around the outer periphery of the support rod 9a to urge the support rod 9a downward together with the clamp block 9. The movable plate 3 is further moved from the above clamp position.
When the support rod 9 descends, the support rod 9 moves against the spring pressure.
The upper end of a protrudes above the movable plate 3 to maintain the clamping position of the clamp block 9.

Further, the pressing rod 10 has a plate 10b at its lower end, and when the movable plate 3 performs the initial downward movement, the pressing rod 10 maintains a certain clearance +α with the cutting edge 8a of the cutting blade 8. At the same time, when the movable plate 3 is lowered by +α in the next step, the press rod 10 is also lowered accordingly, bringing the plate 10b into contact with the cutting blade 8, and performing the function of cutting the skin material to be placed between them. have

Next, the molding material to be molded by the above-mentioned apparatus includes, for example, a thermoplastic resin core material made of 50 parts by weight of polypropylene mixed with 50 parts by weight of wood flour as a filler, and a fabric to be pasted on this core material. , carpet, etc., and the order in which these molding materials are molded into a molded product of a desired shape using the above-mentioned apparatus will be explained using the drawings from FIG. 4 onwards.

First, the resin core material 20a is heated to a semi-molten state and placed on the mold surface 2a of the lower mold 2, and then
The skin material 20b is placed on the core material 20a, and their peripheral edges are positioned on the fixed clamp block 7. In this case, since the resin core material 20a is plasticized, it can be set so as to fit into the mold surface 2a (see FIG. 4).

After setting, if the movable plate 3 is lowered,
First, the movable clamp block 9 engages with the fixed clamp block 7, and the skin material 20b and the core material 2
Clamp the periphery of 0a.

At this stage, the upper mold 4 is lowered, and the clearance between it and the lower mold 2 becomes d+α. In addition, in this state, the core material 20a is flexibly deformed along the mold surface 2a of the lower mold 2. (See Figure 5).

Next, when the press rod 10 descends, the side portions of the skin material 20b and core material 20a held between the side holder 5 of the lower die 2 and the clamp portion are pushed down into a V-shape and expanded. As a result, the resin core material 20a in a plastic state becomes thin and flat.

Next, when the movable plate 3 further descends by +α, the pusher base 6 of the upper die 4 comes into contact with the cradle 5, and the engagement pressure between the two dies 2 and 4 causes the skin material 20b and the core to be separated in the cavity. The material 20a is integrally press-molded, and the core material 20 of the molded product is
The peripheral edge of a is completely thinned obliquely by the contact pressure, and is cut by the pinch-off effect.

At this stage, the pressing rod 10 is pressed against the cutting edge 8 of the cutting blade 8.
The thinned core material 20a between the skin material 20 and a
b and trimming is performed (see Fig. 6).

Therefore, as shown in FIG. 7a, the core material 20a at the edge of the formed laminated molded product A is cut into the shape of the outer periphery of the molded product, and the skin material 20b is rolled up by the cutting blade 8. The thin and flat portion of the core material 20 is easily peeled off from the back surface of the skin material 20b because the core material 20a is stretched and is not bonded in any way. .

Therefore, the product is completed by rolling the wrapping margin 20a of the skin material 20b around the back surface of the molded product along the folding line as shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the overall configuration of the device used to carry out the present invention, FIG. 2 is a side view of the same, FIG. 3 is an enlarged cross-sectional view showing a partial configuration of the device, and FIGS. 4 to 6 7 is a partial sectional view for explaining the sequence of the present invention using the same device, and FIGS. 7a and 7b are enlarged sectional views showing the edge of the finished product. 2...lower mold, 4...upper mold, 5...cradle, 6...
...Pushing stand, 7, 9... Clamp tool (7... Fixed clamp block, 9... Movable clamp block), 8, 10... Cutting blade (8... Cutting blade,
10...pressing rod), 20a...resin core material, 20b
...Skin material.

Claims (1)

[Claims] 1. A resin core material that has been preheated and plasticized is placed in a lower mold having a desired molded product mold surface, and further,
The skin material is placed on the core material, and the periphery of the part protruding from the periphery of the lower mold is fixed with a clamp tool, and the upper mold is lowered relative to the lower mold, and the upper mold is moved along the mold surface of the lower mold. The core material, which has been flexibly deformed by pressing, is crushed by a holder provided along the periphery of the lower mold and a pusher pedestal provided along the periphery of the upper mold, while the periphery of both molds and the clamp The press rod is lowered between the fixed part and the resin core material is stretched by applying tension, and the thickness of the resin core material is reduced.Then, the upper mold is lowered together with the press rod, and the upper and lower molds are used to remove the skin material. At the same time, the core material is integrally press-molded, the core material is cut using a pedestal and a pusher on the periphery of both molds, and both the core material and the skin material are cut using a pressing rod. , a core material, and a skin material are each cut into a desired outer peripheral shape.