JPH0623841A - Method and apparatus for treating terminal of skinned molded product - Google Patents

Abstract

PURPOSE:To treat the terminal of a skinned molded product such as a car interior part so as to be capable of shortening a process cycle time without generating trouble such as positional shift, slackening or the overlap at corner parts. CONSTITUTION:A skin material 3 is pressed to a mold 4 by a molded product 1 and the excessive part 3b of the skin material 3 protruding from the end edge of the molded product 1 is folded back to the back of the molded product 1 by a first involving member 6 and the folded-back terminal is pressed and bonded to the rear of the molded product 1 by a second involving member 7. By continuously performing the two-stage bidirectional involution and press bonding operations of the terminal of the skin material 3, the terminal treatment of the skinned molded product excellent in quality can be performed within a short process cycle time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal processing method and a processing apparatus in a manufacturing process of a skinned molded article such as an automobile interior part.

[0002]

2. Description of the Related Art Conventionally, for example, an instrument panel,
Manufacture of molded products with skin such as automobile interior parts such as pillar garnish is performed by integrally molding a synthetic resin molded product as a core material and a surface material of a cloth or a synthetic resin sheet by stamping. . In the manufacturing of this molded product with skin, the terminal treatment technology of wrapping the end portion of the skin material on the back side of the molded product and crimping it has a great influence on the appearance and appearance of the product, and requires a great deal of man-hours for processing. Therefore, the improvement has been requested for many years. As a technique for improving the end treatment of such a molded article with a skin, for example, JP-A 1-218820 and 1-196 are available.
There is one disclosed in Japanese Patent No. 332.

[0003]

However, in the method disclosed in Japanese Patent Laid-Open No. 1-218820, only the end of the skin material is bent inward from the side of the molding die with the push pin, so that the molded product (core material ) It is not possible to fold and attach the skin material terminal to the back side sufficiently.

In the method disclosed in JP-A-1-196332, after a skin material is pressed (pressed) on a molded product, the molded product holding and pressing member is once separated from the molded product, and then the molding die is used. Since the skin bending member is projected from the outer side of the sheet, the end of the skin material is turned inward by 180 °, the skin bending member is returned to its original position, and the molded product holding and pressing member is lowered again and repressed. Since the holding and releasing of the product must be repeated twice, the process cycle becomes long and the positional deviation of the molded product easily occurs. In addition, when returning the skin-folding member, there is a risk that the skin-material end may be misaligned and doubled or turned over.After the skin-folding member is retracted, the skin-material end is in a free state. At the corners and the like of a large skin material, the skin material end tends to sag and rise, which causes a problem in the next repressing step.

In view of the above-mentioned problems of the prior art, the present invention makes it possible to shorten the cycle time and to shift the position by continuously winding and adhering the skin material terminal to the back surface of the molded article with the roll. An object of the present invention is to provide a terminal treatment method for a molded article with a skin and a treatment apparatus for the same, which does not cause problems such as slack and overlap at corners.

[0006]

In order to achieve the above-mentioned object, a method of terminal treatment of a molded article with a skin of the present invention is a method of pressing a skin material against a mold by a molded article and protruding the edge of the molded article. The surplus part of is folded back to the back of the molded product by the first winding body moving from the outside of the molded product toward the back of the molded product, and then the folded back end is moved from the back of the molded product to the back of the molded product. It is pressed against the back surface of the molded product by the moving second winding body.

Further, the end treatment apparatus for a molded article with a skin of the present invention can receive the upper mold to which the molded product can be attached and detached, and the molded product mounted on the upper mold via the skin material. A lower die having a recess, means for approaching and separating the upper die from the lower die, and for winding a surplus portion of the skin material protruding from an edge of the molded article to the back side of the molded article. The first winding body, means for moving the first winding body back and forth from the outer side of the molded product to the rear side, and the surplus portion of the skin material wound on the back side of the molded product. It has a second rolled-up body for pressing against the back surface of the molded product, and means for moving the second rolled-up body back and forth from the back of the molded product toward the back surface. In addition, it is preferable that the first winding body and the second winding body are provided with rack-shaped teeth, which can mesh with each other, at their front end edge portions with a required lap margin.

[0008]

In the end treatment method for a molded article with a skin of the present invention configured as described above, in the state where the skin material is pressed against the mold by the molded article serving as the core material, the skin protruding from the edge of the molded article The surplus part of the material is folded back from the outer side of the molded product to the rear side of the molded product by the first winding body, and subsequently the folded back end is pressed against the back surface of the molded product by the second winding body. The operation of winding and adhering the end of the skin material on the back surface of the product is continuously performed, and the end processing is performed in a short cycle time without the possibility of causing positional deviation or slack.

Further, according to the apparatus for treating a molded product with a skin of the present invention, the molded product mounted on the upper mold is pressed to the lower mold via the skin material, and in this state, the molded product protrudes from the edge of the molded product. The surplus part of the skin material is folded back to the back of the molded product with the first winding body,
Further, the terminal treatment operation of the method of the present invention, in which the terminal is wound onto the back surface of the molded article by the second roll and pressed, is continuously and efficiently performed. Particularly, when the front end edges of the first winding body and the second winding body are provided with rack-shaped teeth that can be meshed with each other with a required lap margin, the skin material end is folded back and pressed by the first winding body. Since the operation of lowering the second rolled-up body and pressing and adhering the second rolled-up body to the back surface of the molded product is performed, the terminal processing becomes more efficient and reliable.

[0010]

【Example】

(Embodiment 1) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross section of the lower mold end which is a part of one embodiment of the apparatus for treating a molded article with a skin according to the present invention. It explains a part of the process of the example. In the figure, 1 is a synthetic resin molded product which is a core material of a skinned molded product (in this embodiment, a pillar garnish of a passenger car is exemplified), and 4 is a synthetic resin lower mold. The lower mold 4 has an inverted shape of the molded product 1 serving as the core material, and receives the molded product 1 via a skin material 3 such as a cloth or a synthetic resin sheet. If the cushioning property of the skin material 3 is insufficient, it is preferable to additionally mount a cushion layer (flexible layer) 5 on the surface of the lower mold 4, as shown in the figure.

In the process of covering the skin of the molded product, the process shown in FIG.
As shown in (a), the skin material 3 is set on the lower mold 4, and the molded product (core material) 1 to which the adhesive is applied is mounted on the molded product holding and pressing member (upper mold) (not shown in the figure). Is lowered by a first cylinder (not shown in the figure) as shown in FIG. 1 (b), and the molded product 1 and the skin material 3 are pressed and laminated on the lower mold 4. At this time, as shown in the figure, a constriction 3a occurs in the skin material 3 at the edge of the molded product 1, but the cushion layer 5 is not provided on the lower mold 4 and the cushioning property of the skin material 3 is insufficient. This constriction does not occur, and there arises a defect that the surplus portion 3b of the end of the skin material 3 cannot be properly wrapped around the back surface of the molded product 1 in a later step. Next, the first winding body 6 is moved to the rear side of the molded product 1 from the outer side of the lower die 4 by a second cylinder (not shown in the figure) which operates in the direction (horizontal direction). Then, the surplus portion 3b at the end of the skin material 3 is folded back to the back of the molded product 1.

FIG. 2 is a process explanatory diagram of the terminal processing of the molded article with the skin by the operation of the apparatus of this embodiment. In the figure,
(A)-(c) is the winding of the surplus part 3b of the skin material 3 from the set of the skin material 3 of (a)-(c) of FIG. The same process as the process up to the inclusion is shown. In the figure, 2 is a molded product holding and pressing member (upper mold) for mounting a molded product, 12 is a first cylinder for moving the molded product holding and pressing member 2 up and down, and 16 is a first cylinder.
The 2nd cylinder which horizontally moves the roll 6 is shown.

Next, the second winding body 7 is lowered by the second cylinder 17 operating in the direction from the rear side to the back side (upper and lower direction) of the molded product 1 as shown in FIG.
The surplus portion 3b is pressed against the back surface of the molded product 1 to be attached. Then, the first winding body 6 (second cylinder 16) is retracted as shown in FIG. 7E, and the second winding body 7 is made as shown in FIG.
(3rd cylinder 17) is raised, and as shown in FIG. 7 (g), the molded product holding and pressing member 2 (first cylinder 12) is raised to release the product (molded product with skin) from the lower mold 4,
Next, as shown in FIG. 3H, the molded product holding and pressing member (upper mold) 2
Remove from the product and take out the product. Thus, by the operations from (a) to (h) in the figure, one cycle of the step of attaching the skin of the molded article with the skin and the terminal treatment step is completed.

As described above, according to the method and apparatus of this embodiment, from the pressing and sticking of the molded product (core material) to the skin material,
The steps from winding of the terminal surplus portion of the skin material to pasting and removal of the product are continuously performed as shown in FIGS. 2 (a) to 2 (h), without causing misalignment of the molded product or the skin material. High-quality terminal processing can be automatically performed in a short cycle. (Embodiment 2) Next, a second embodiment in which a part of the end treatment device for a molded article with a skin according to the first embodiment is improved will be described with reference to FIG.

FIG. 3 is a perspective view of an essential part of the apparatus of the second embodiment, which is an enlarged view of the first winding body, the second winding body and the lower die. As shown in the drawing, the first winding body (folding piece) 6 which is moved in the arrow X direction (horizontal direction) by the second cylinder 16 (not shown in the figure).
And the second winding body (sticking piece) 7 which is moved in the arrow Y direction (up and down direction) by the third cylinder 17 (not shown in the figure), respectively. 7a and these rack teeth 6a,
The peaks and valleys of 7a are in a shape that can mesh with each other.

In the case of the present embodiment, in the step (c) of FIG. 2, the first winding body 6 is horizontally advanced to fold back the surplus portion 3b of the end of the skin material 3 to the back of the molded product 1, and its front end. After the surplus portion 3b is pressed by the edge (rack-shaped teeth 6a), when the second winding body 7 descends in the step (d), the second winding body 7
The rack-shaped teeth 7a of the rack-shaped teeth 6a of the first winding body 6 are
The remaining portion 3b is pressed onto the back surface of the molded product 1 and adhered to each other with a predetermined lap margin.

Therefore, according to this embodiment, there is no interference with the first winding body when lowering the second winding body,
The surplus portion can be pressed and adhered by the second winding body while the end surplus portion of the skin material is sufficiently pressed by the first winding body, and the skin material or the molded product may be displaced or the skin material end portion It is possible to realize higher quality terminal processing without causing slack or overlapping.

[0019]

As is apparent from the above description, in the method for treating a molded article with skin according to the present invention, the surface material is pressed from the edge of the molded article while being pressed against the mold by the molded article serving as the core material. The surplus portion of the skin material that has protruded is folded back from the outer side of the molded product to the rear side of the molded product by the first winding body, and subsequently the folded back end is pressed onto the back surface of the molded product by the second winding body. Therefore, the operation of winding and sticking the end of the skin material on the back surface of the molded product is continuously performed, and there is no room for positional deviation or slack, and the end processing is performed in a short cycle time.

Further, according to the apparatus for treating a molded product with a skin of the present invention, the molded product mounted on the upper mold is pressed to the lower mold via the skin material, and in this state, the molded product protrudes from the edge of the molded product. The surplus part of the skin material is folded back to the back of the molded product with the first winding body,
Further, the terminal treatment operation of the method of the present invention, in which the terminal is wound onto the back surface of the molded article by the second roll and pressed, is continuously and efficiently performed. Particularly, when the front end edges of the first winding body and the second winding body are provided with rack-shaped teeth that can be meshed with each other with a required lap margin, the skin material end is folded back and pressed by the first winding body. Since the operation of lowering the second rolled-up body and pressing and adhering the second rolled-up body to the back surface of the molded product is performed, the terminal processing becomes more efficient and reliable.

[Brief description of drawings]

1 (a), (b) and (c) are cross-sections of a lower mold end which is a part of a first embodiment of a terminal treatment device for a molded article with a skin according to the present invention, and the present invention. It is explanatory drawing of a part of process of one Example of the terminal treatment method of the molded article with a skin.

2 (a), (b), (c), (d), (e),
(F), (g), (h) is process explanatory drawing of the terminal processing of the molded article with a skin by the Example of FIG.

FIG. 3 is an enlarged perspective view of the essential parts of a second embodiment of the terminal processing apparatus for molded products with skin according to the present invention.

[Explanation of symbols]

 1 Molded Product (Core Material) 2 Molded Product Holding Pressing Member (Upper Mold) 3 Skin Material 3b Remaining Part 4 Lower Mold 6 1st Rolling Body 6a Rack-shaped Teeth 7 2nd Rolling Body 7a Rack-shaped Gear 12 1st Cylinder 16 second cylinder 17 third cylinder

[Procedure amendment]

[Submission date] May 22, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

Claims (3)

[Claims] 1. A skin material is pressed against a mold by a molded product, and a surplus portion of the skin material protruding from an edge of the molded product is moved by a first winding body that moves from the outside of the molded product toward the back of the molded product. A molded article with a skin characterized by being folded back to the back of the molded article and then pressing the folded back end onto the back surface of the molded article by a second roll that moves from behind the molded article toward the back surface of the molded article. Terminal processing method. 2. An upper mold to which a molded product can be attached and detached,
A lower mold having a recess capable of receiving a molded product mounted on the upper mold through a skin material; a means for moving the upper mold closer to or separated from the lower mold; and an end of the molded product. A first winding body for winding the surplus portion of the skin material protruding from the edge to the back side of the molded product, and means for advancing and retracting the first rolled body from the outer side of the molded product to the rear side. And a second winding body for pressing the surplus portion of the skin material wound on the back side of the molded product to the back surface of the molded product, and the second rolled body from the rear side of the molded product. An end treatment device for a molded article with a skin, characterized in that it has a means for advancing and retreating toward the back side. 3. The first winding body and the second winding body each have a rack-shaped tooth on a front edge thereof, and when the second winding body presses a surplus portion of the skin material, The end treatment device for a molded article with a skin according to claim 2, wherein the rack-shaped teeth of the both rolls are configured to mesh with each other with a desired lap margin.