JPS63132026A - Laminate and its molding process - Google Patents

Abstract

PURPOSE:To cause a product to be remarkably excellent in its appearance and design, while having no wrinkle generated adjacently to the parting line of both skin members on the surface of a product by a method in which a groove part is provided at the side of a resin core member correspondingly to the junction of the skin members, and said junction is buried and fixed into the groove part. CONSTITUTION:The skin members to which different materials are bonded, are placed on the surface of the resin core member in preheated and softened condition, and a cold press molding is carried out, thereby molding integrally said members into a laminate. For instance, at the door trim of an automobile, the skin member of general part 13 and the skin member of intermediate contact part 14 have been sewed, before the skin members are integrally molded with a core member 11. The borderline between the skin member of general part 13 and the skin member of intermediate contact part 14 defines a parting line 18, and sewed portion 19 projects onto the rear and front surfaces thereof. This sewed portion 19 is buried and fixed into a groove part 20 provided at the molding of the core member 11 when the skin members are integrally stuck to the surface of the core member 11. Accordingly, since the sewed portion 19 is received in the groove part 20 along the parting line 18 of the skin members 12, the unevenness or jetting in the parting line 18 does not occur.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a laminated molded product such as an automobile door trim or a rear corner, and a method for molding the same.

(Prior art) Recently, in interior parts such as automobile door trims,
Designed appearance performance is required, and for example, the product surface is not composed of a single material, but is a combination of multiple materials, such as a combination of fabric and vinyl chloride, or a rough combination of carpet and fabric. More and more products are using skin materials.

For example, taking a conventional door trim as an example in FIG. 7, this door trim 1 is made of wood fiberboard.

It is constructed by covering the surface of a core material 2, which is formed by press-molding a composite resin plate or the like into a desired shape, with two types of skin materials 3 and 4.

In manufacturing this door top 1 piece 1, if a composite resin plate is used as the core material 2, first place the core material 2 in a heat-softened state on the mold surface of a lower die for cold press (not shown), and then Then, the skin material 3 on one side is set, and the upper mold for cold press, also not shown, is lowered, and the core material 2 and the skin material 3 are molded into the desired shape by the upper and lower molds for cold press.

If the specifications of the skin material are different only for the waist portion of the door trim 1 as in this conventional example, the skin material 4 on the other side is coated only on the door waist portion from above the skin material 3 described above. It is common to wind up the end of this skin material 40 and attach an elongated decorative member 5 along the parting line between the two.

However, in such a bonded molded product using different types of skin materials 3 and 4, it is necessary to cover and integrate each skin material in separate steps, which has the disadvantage of requiring many steps.

Furthermore, because the skin material 4 covers the door waist portion, this portion, that is, the skin material 3 of the door waist portion, is wasted, resulting in a lot of material loss, and also hides the meandering of the parting line of the image skin materials 3 and 4. Therefore, there were various problems such as the need to attach a separate decorative member 5 and the need for a complicated assembly process.

(Object of the Invention) This invention was made in view of the above-mentioned circumstances, and the object of the present invention is to produce a bonded molded product using two or more types of skin materials, Molding and adhesion of the core material and skin material can be done in the same process, greatly shortening the work process, eliminating the need for electrical material on the skin material, and making it possible to form a neat cutting line. To provide a laminated molded product and a method for molding the same, which can eliminate decorative members for hiding lines and significantly reduce costs.

(Structure and Effects of the Invention) In order to achieve the above object, the present invention provides a method in which a skin material in which different materials are bonded is placed on the surface of a resin core material in a preheated and softened state, and cold press molding is performed. , in a laminated molded product that is integrally molded into a desired shape, a groove is provided on the resin core material side corresponding to the joint of the skin material, and the joint is embedded and fixed in the groove. It is characterized by

That is, according to the above configuration, since the skin material is formed in advance by joining skin materials of different materials, if the joined skin material is press-molded with the core material, Molding the core material and attaching the core material to the skin material can be done in one process, significantly reducing the work process compared to the conventional method that required a process for attaching each skin material to the core material. It has the advantage of being able to be shortened.

Furthermore, according to the above-mentioned structure, it goes without saying that no electrical material is generated in the skin material, and since the joint part of the skin material is buried and fixed in the groove of the core material during press molding of the core material, the surface of the product is not affected. Wrinkles do not occur near the parting line of the picture surface material, and the product has an extremely excellent appearance design.

The method for forming the laminated molded product involves fixing the outer periphery of the skin material formed by joining dissimilar materials to a frame, and supporting this frame by a support member installed in a press mold. At the same time, setting the skin material so that the joint part of the skin material is located at the tip of the guide piece provided on the upper mold and biased downward;
A step of placing a resin core material in a preheated softened state on the mold surface of a lower pressing mold which has grooves corresponding to the joints of the skin material, and converting the upper pressing mold to the lower pressing mold. The process of pressing the core material 1 skin material into the groove of the lower mold by pressing the core material 1 skin material into the groove of the lower die by the tip of the guide piece, and pressing the core material and skin material until they are pressed with a predetermined pressure. The present invention is characterized by the following steps: lowering the upper die, forming the core material using the upper and lower press dies, and simultaneously integrating the core material and the skin material.

In other words, in the process of setting the skin material, the frame that fixes the outer periphery of the skin material with dissimilar materials bonded together is held by a support member provided in the press mold, and the joint is turned downward. When the upper press die is lowered, the skin material is first placed on the core material along the groove formed in the lower press die. After the joint is fully abutted and this joint is embedded and fixed within the core material, the upper mold for pressing is further lowered, and the general part of the skin material is adhered and integrated with the surface of the core material. Accordingly, the two-step lowering operation of the upper mold for pressing allows forming of the core material and adhesion of the core material and the skin material, thereby greatly shortening the work process.

When embedding the joint of the skin material in the core material, tension is applied in the direction that the skin material adheres to the core material, so wrinkles do not occur near the parting line of the skin material, and the design is improved. A good laminated molded product can be obtained.

(Description of Examples) Hereinafter, examples of the bonded molded product and the method for molding the same according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view showing an example in which the present invention is applied to a door trim for an office vehicle; FIGS. FIG. 6 is a perspective view of a door trim for an automobile showing a second embodiment of the present invention.

In FIG. 1, an automobile door trim 10 is roughly composed of a core material 11 made of composite resin molded into a desired shape, and a skin material 12 that is integrally bonded to the surface of the core material 11.
The above-mentioned skin material 12 includes - crotch skin material 13 and living skin material 1
A combination skin material with 4 is used.

That is, in this embodiment, the crotch skin material 13 is made of polyethylene foam on the back surface of the PVC sheet 15.

It is configured to be lined with a foam layer 16 such as polypropylene foam to provide cushioning properties, and the living area skin material 1
4 uses cloth 17 to emphasize the luxurious feel. Incidentally, the back surface of the cloth 17 may be lined with a pad material if desired.

Furthermore, the core material 11 is made by mixing and stirring polypropylene resin and wood flour at an appropriate mixing ratio (50:50 in the case of this example), extruding it into a sheet shape using a T-die extruder, softening it by heating, and cold-molding it. By press molding, it is formed integrally with the skin material 12 into the shape shown in FIG. 1.

Next, before the skin material 12 is integrally molded with the core material 11, the crotch skin material 13 and the living area skin material 14 are sewn together. The boundary between the above-mentioned crotch skin material 13 and the living area skin material 14 forms a cut line 18, and a sewn part 19 protrudes from the back side of the cut line 18.
When the core material 11 is integrally attached to the surface of the core material 11, it is embedded and fixed in the groove portion 20 provided when the core material 11 is molded.

Therefore, since the sewn portion 19 is accommodated in the groove 20 along the parting line 18 of the skin material 12, the parting line 18 does not have unevenness or meandering, and the parting line 18 can emphasize a sharp line. , aesthetically pleasing.

In the above-mentioned embodiment, the crotch skin material 13 and the living area skin material 14 were joined as the skin material 12 by hammering, but they may be joined by high frequency welding.

Next, each step of the method for forming the door trim 10 will be explained based on FIGS. 2 to 5.

First, the outer peripheral edge of the skin material 12 obtained by sewing the crotch skin material 13 and the living region skin material 14 is fixed to a frame 21 made of a light metal such as aluminum. At this time, locking pins 22 are protruded from the upper surface of the frame 21 at predetermined pitches, and the outer peripheral edge of the skin material 12 may be pierced into the locking pins 22 to be fixed.

Then, in this way, the outer peripheral edge of the skin material 12 is attached to the locking pin 2.
2 is placed on the holding member 25 provided on the base table 24 of the upper die 23 for press. This holding member 25 is connected by a wire 28 to a sliding member 27 that is slidably disposed in a cavity 26 in the base table 24, and this holding member 25 is connected to the upper press die 2
The downward stroke of each holding member 25 is regulated by the sliding stroke of the sliding member 27 provided along the four corners of the holding member 3 and forming a pair with each holding member 25.

Furthermore, with the frame 21 placed on the holding member 25, the guide piece 29 provided in the upper press mold 23 is
The sewn portion 19 of the skin material 12 is set on the tip 29a of the cover material 12.

At this time, the guide piece 29 is always urged downward by the spring 30 with appropriate spring pressure.

On the other hand, as shown in FIG. 3, the lower mold 31 for pressing has a groove 32 formed on its mold surface 31a corresponding to the parting line 18 of the product, and the upper mold 23 for pressing the original The provided guide piece 29 is designed to fit into this groove 32.

Then, the core material 11 that has been preheated and softened by a heating means (not shown) is placed on the mold surface 31a of the lower mold 31 for pressing.

Next, the upper die 23 for press is moved by an elevating means (not shown).
First, the guide piece 29 protrudes downward to the maximum extent due to the spring pressure of the spring 30, and the skin material 12 is lowered.
Groove 3 of the lower press die 31 along the older cutting line 18 of
2, the core material 112 and the skin material 12 are pressed by this guide piece 29 (see FIG. 4).

At this time, since the height position of the skin material is different in each part of the parting line 18, the individual movement members 27 are operated to change the height position of the holding member 25, and the core material 11 What is necessary is to maintain a good positional relationship between the surface material 12 and the surface material 12.

Further, the upper press die 23 is lowered to the position shown in FIG. In this state, the core material 11 is formed within the clearance between the upper press mold 23 and the lower press mold 31, and the core material 11 and the skin material 12 are bonded and integrated.

At this time, the guide piece 29 is pushed upward against the spring pressure of the spring 30, and a hydraulic cylinder 3 is inserted into the upper die 23 for pressing at a place where it is difficult to form the shape.
3 is built-in, and a presser member 34 fixed to the cylinder rod 33a of this hydraulic cylinder 33 ensures the shaping.

Furthermore, as a terminal processing method, after the upper and lower press molds 23 and 31 are pressed into the state shown in FIG.
1 for terminal processing by the hydraulic cylinder 35 provided in 4.
By sliding the training bar 36, the end of the skin material 12 at the undercut portion is fixed to the core material 11.

Further, the reciprocating movement of the hydraulic cylinder 35 is performed in conjunction with the lowering movement of the upper mold 23 for press, and when the reciprocating movement of the hydraulic cylinder 35 is completed, the upper mold 23 for press rises. , the molded product is pressed into the lower mold 3
1, the door trim 10 as shown in FIG.
is (qed).

As explained above, according to the molding method according to the present invention,
The process of attaching the skin material 12 to the core material 11 is done in one step, and the parting line 18 of the skin material 12 is attached to the guide piece 29.
By clamping and holding the outer periphery of the skin material 12 while molding is performed, the parting line 18 can be easily positioned. The skin material 12 is the core material 11.
Because it is buried inside, the cutting line 18 has unevenness.

Products with excellent design performance can be provided without meandering.

In this embodiment, the skin material 12 is combined with the crotch skin material 13 and the living area skin material 14, but as shown in FIG. 38. The lower side skin material 39 may also be formed by sewing three types of skin materials together to join them together.The scope of application of the present invention is not limited to the above-mentioned embodiments. do not have.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view showing an example in which the laminated molded product according to the present invention is applied to an automobile door trim, Figs. 2 to 5 are sectional views showing the molding process of the door trim, and Fig. 6 is a FIG. 7 is a perspective view of a door trim showing another embodiment of the laminated molded product according to the present invention, and FIG. 7 is a sectional view showing the structure of a conventional automobile door trim. 10... Automobile door trim 11... Core material 1... Skin material 13... - Crotch skin material 14... Living area skin material 18... One brother cutting line... Sewing Part 21... Frame 22... Locking pin 23... Upper die for press 24... Base table 25... Holding member 27... Sliding member 28... Wire 29... Guide piece 30...Spring 3...Lower die for press 32...Groove portion 33.35...Hydraulic cylinder 34...Press member 36...Sliding bar 37...Skin material 38... ...Upper side skin material 39...Lower side skin material Patent applicant Kasai Kogyo Co., Ltd. Figure 1 Figure 6 Figure 7

Claims (2)

[Claims] (1) In a laminated molded product that is integrally molded into a desired shape by placing a skin material made of different materials bonded on the surface of a resin core material in a preheated softened state and performing cold press molding, the above-mentioned A laminated molded product characterized in that a groove is provided on the resin core material side corresponding to the joint of the skin material, and the joint is embedded and fixed in the groove. (2) The outer peripheral edge of the skin material formed by joining different materials is fixed to a frame, and this frame is supported by a support member installed in a press mold, and a support member installed in an upper mold, a step of setting the skin material so that the joint part of the skin material is located at the tip of the guide piece that is biased downward; and a step of setting the skin material so that the joint part of the skin material is located at the tip of the guide piece that is biased downward; A step of placing a resin core material in a preheated and softened state on the mold surface of the mold, and lowering the upper mold for pressing with respect to the lower mold for pressing, and using the tip of the guide piece to move the core material along the joint part. The process of pressing the core material and the skin material into the grooves of the lower die, lowering the upper press die until the core material and the skin material are pressed together with a predetermined pressure, and forming the core material with the upper and lower press dies, at the same time, A method for forming a laminated molded product, comprising: a step of integrating a core material and a skin material;