JPH0497832A - Manufacture of trim parts for automobile - Google Patents

Abstract

PURPOSE:To position simply and reliably a sewn line, which is favorable from an external appearance point of view, at a fixed position and handmade feeling and high-class feeling are given to the title trim parts, by a method wherein parts each of a skin material molded in a necessary form beforehand are sewn and joined to each other and the sewn line of the skin material is made into a fixing standard. CONSTITUTION:Skin materials 13 of every parts 13a, 13b, 13c are molded into desired forms and then they are formed by sewing processing. The skin material 13 and a core material 12 with a pad material 12 which is molded separately are pressure-contacted, unified and molding of a door trim 10 is completed. A sewn line 15 superior in design properties is completed and since the sewn line 15 is made into a fixing standard in positioning of the skin material, the sewn line 15 is formed at a fixed position. Therefore, simple and reliable positioning becomes possible and a thickness of an entrapment part 16 of the skin material 13 is absorbed by a groove 11a formed into the core material 11. Therefore, a protuberance is not generated along the sewn line 15 and a desired curved surface form is obtained.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a method for manufacturing interior parts for automobiles, and in particular, a method for manufacturing interior parts for automobiles that has sewing lines formed on the surface to emphasize the handmade feel. Regarding the method.

<Prior Art> As is well known, interior parts such as door trims and instrument pads are installed inside automobiles to protect occupants and improve the aesthetics of the interior.

The general structure of these interior parts will be explained using an example of an automobile door trim based on FIG. A pad material 3 such as a polyurethane foam laminated on the surface of the core material 2 and having cushioning properties, and a resin sheet such as a PVC sheet or cloth covering the outer surface of these It is generally composed of a skin material 4.

The method for manufacturing the above automobile door trim 1 includes slush molding the skin material 4 according to the external shape of the product.
The core material 2 is formed by vacuum forming or the like, and the pad material 3 is laminated on the surface of the core material 2, and then the core material 2 is formed using a compression mold. A construction method is adopted in which the pad material 31 and the skin material 4 are integrated through adhesive.

<Problems to be Solved by the Invention> As described above, the conventional press-molded automobile door trim 1 uses a slush-molded skin, a vacuum-formed skin, etc. as the skin material 4, and since these are single-piece skins, It had a strong image of being mass-produced, and lacked a sense of handmadeness or luxury.

In order to create this handmade feel, interior parts are manufactured by covering the outer periphery of the core material with padding material in a later process with a skin material that is sewn together, but it is difficult to position this sewing line at a predetermined location. It was not a practical method because it was difficult to obtain a uniform appearance, and the sewing line meandered.

This invention was made in view of these circumstances,
An object of the present invention is to provide a method for manufacturing automobile interior parts based on press molding, in which a sewing line with a good appearance can be easily and precisely positioned at a predetermined location, and a handmade feel can be achieved. An object of the present invention is to provide a method for manufacturing interior parts for automobiles that give a sense of luxury.

<Means for Solving the Problems> In order to achieve the above object, the method for manufacturing automotive interior parts according to the present invention involves sewing and joining each part of the skin material that has been formed into a desired shape in advance, and a step of forming a skin material with the skin material on one side of a compression mold;
In addition to setting the special line as the installation standard,
On the other side of the mold for crimping a core key with a pad material, which has a pad material with cushioning properties affixed to one side of the core H, which is formed into the required shape and has a groove formed along the sewing line of the skin material. The setting process of the material to be set and the clamping of the crimping mold allow the skin material and the core material with padding material to be crimped and integrated via adhesive, and the skin material is wrapped along the sewing line. The core material is characterized in that the thickness of the core material is reduced by the grooves of the core material.

<Operation> As is clear from the above configuration, according to the method of the present invention,
Since each part of the skin H that has been previously molded into a desired shape is sewn and joined, the sewing line does not shift or meander due to molding.

Furthermore, the skin material can be easily positioned by positioning it at a predetermined location on the crimping mold using the sewing line of the skin material as a mounting reference.

<Example> Hereinafter, a method for manufacturing an automobile interior part 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 the structure of an automobile door trim manufactured by applying the method of the present invention, and FIGS. 2 to 7 are explanatory diagrams showing each step of the method of the present invention.

In FIG. 1, an automobile door trim 10 manufactured by the method of the present invention includes a core material 11 having appropriate shape retention and mounting rigidity to a vehicle body panel, and a core material 11 that is integrally attached to the surface side of the core material 11. It is generally composed of a pad material 12 that provides cushioning properties and a skin material 13 that covers the outer surface thereof.

More specifically, the core material 11 is made by extruding a mixture of polypropylene resin and wood powder filler into a sheet using an extrusion molding machine, heating and softening this sheet, and then cold press molding it into the desired shape. The core material 11 is molded to obtain a desired curved surface shape, and a pad material 12 such as polyurethane foam is adhered to the core material 11 integrally when the core material 11 is molded.

Further, as the skin material 13, a waist part skin 13a is provided corresponding to the waist part 10a, the upper part 10b, and the lower part 10c of the door trim 10.

It has a three-part structure such as an upper part skin 13b and a lower part skin 13c.

Then, the waist part skin 13a, the upper part skin 13b, and the lower part skin 13c, which are each part, are each molded into a desired shape, and the waist part skin 13a and the upper part skin 13b are sewn and joined, and then the upper part skin 13b is joined by sewing. 13b
The skin material 13 is constructed by joining the lower part skin 13c and the lower part skin 13c in the same manner.

Note that reference numeral 14 indicates the joining line of the waist part skin 13a, the upper part skin 13b, and the lower part skin 13c, and sewing threads are intermittently formed on the product surface side along the upper and lower sides of this joining line 14. A sewing line 15 is formed.

The skin material 13 is not particularly limited to any material as long as it can be molded by general-purpose molding means such as vacuum forming or press molding. Materials made by forming lined composite sheets or PVC foam sheets into desired shapes by vacuum forming, etc., materials formed by slush molding of PVC resin powder, urethane resin powder, etc., and genuine leather and synthetic leather, which can be molded. It may be appropriately selected from those formed by press molding or the like into a desired shape to reduce bending loss or the like.

In order to absorb the thickness of the rolled-up portion 16 of the skin material 13 at the joint portion, a groove portion 11a along the sewing line 15 is previously formed in the core material 11 when the core material 11 is molded.

As shown in the figure, the automobile door trim 10 has the zero-made lines 15 emphasized along the waist corner line and the armrest corner line, giving it a handmade image and creating a sense of luxury. .

If the method of the present invention, which will be described later, is used, the sewing line 15 will not be misaligned or meandering, and the sewing line 15 can be easily positioned in a predetermined area, giving a beautiful appearance. Extremely high commercial value.

Next, the manufacturing process of this automobile door trim 10 will be explained step by step.

First, as shown in FIG.
3b and the lower part skin 13c are each formed into a desired shape, and the joining parts of these parts 13a, 13b, 13C are curled and sewn together as shown in the figure.
, are sewn along two special lines 15 to form the skin material 13.

In addition, during this special processing, it is also possible to create variations in the appearance of the product by appropriately adopting special sewing patterns such as those shown in Figures 3 and 4 in addition to the sewing pattern shown in Figure 2. Furthermore, as shown in FIG. 5, if a plurality of wrinkles are formed in advance in the upper part skin 13b along the uni direction and then sewn and joined to the lower part skin 13c, the appearance can be made more beautiful. Ru.

Next, as shown in FIG. 6, the skin material 13 formed in the above step is set on the mold surface of the lower crimping mold 20, and a separate layer is placed on the mold surface of the mold 21 on the crimping layer located above the lower crimping mold 20. The molded core material 11 with pad material 12 is set.

At this time, if the sewing line 15 of the skin material 13 is positioned at a predetermined location of the crimp lower mold 20 corresponding to the waist corner line or armrest corner line of the door trim 10, that is, this sewing line 1-5 is used as the installation reference. The entire skin material 13 can be easily and reliably set on the lower pressure mold 20.

After that, the adhesive 23 is applied to the skin material 1 using the spray gun 22.
After coating the inner surface of the crimping mold 3, as shown in FIG. , skin material 13. Pad material 12. The core material 11 and the core material 11 are crimped and integrated to complete the molding of the door I/rim 10 for a zero-vehicle vehicle shown in FIG.

As described above, according to the method of the present invention, the skin material 13 is formed into a desired shape for each part 13a, 13b, and 13c,
Since it is then formed by a sewing process, even if excessive press pressure is applied to the skin material 13 during the crimping process, the sewing line 15 will not shift or meander, making it possible to create a sewing line 15 with excellent design. It is possible to provide a door trim 10 that can be formed at a predetermined location, emphasizes the handmade feel, and has an excellent exterior design.

Furthermore, in positioning the skin material 13, by using the sewing line 15 as the attachment reference, even if there are variations in the overall dimensions of the skin material 13, the sewing line 15 can be formed at a predetermined location, making it easy and reliable. In addition to enabling precise positioning, the groove portion 11a formed in the core material 11 absorbs the thickness of the wrapped portion 16 of the skin oil 13.
There is an advantage that no swelling occurs along the sewing line 15 and a desired curved surface shape can be obtained.

<Effects of the Invention> As explained above, the method of the present invention has the following special effects.

■According to the method of the present invention, the skin material is formed by forming each part of the skin material into the required shape and sewing and joining these parts, so the skin material and the core material with padding material are When integrating the press, even if excessive press pressure is applied to the skin material, it is possible to reliably prevent meandering or misalignment of the sewing line, emphasize the beautiful sewing line, give a handmade image, and create a high-class This has the effect of providing interior parts with a high commercial value.

■According to the method of the present invention, when setting the skin material in the crimping mold, by using the sewing line formed on the skin material as the attachment reference, the skin material can be positioned and set easily and quickly. This has the effect of improving workability in preparing food sets.

■According to the method of the present invention, a groove is formed on the core material side to absorb the thickness of the rolled-up portion formed along the sewing line, so there is no bulge in the product along the sewing line, and the desired A gently curved surface shape can be obtained, and the surface appearance and feel of the surface can be improved.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional perspective view showing the structure of an automobile door trim obtained by applying the method of the present invention, and FIGS. 2 to 6 show each step of the method of the present invention. FIG. 3 is an explanatory view showing the process of forming the material. 5 to 5 are partial cross-sectional perspective views showing different sewing patterns in the manufacturing process of the skin material, and FIGS. 6 and 7 are cross-sectional views showing the process of crimping and integrating the skin material and the core material with padding material. , FIG. 8 is a partially sectional perspective view showing the structure of a conventional automobile door trim. 10...Car door trim 10a...Waist part 10b...Upper part 10c...Lower part 11...Core material 11a...Groove part 12... Pad material 13...Skin material 13a...Waist part skin 13b...Upper part skin 13c...Lower part skin 14...Join line 15...Sewing Line 16... Winding part 20... Lower crimp die 21... Upper crimp die 23... Adhesive

Claims (1)

[Claims] 1. Each part (13a, 13b, 13c) of the skin material (13) previously formed into a desired shape is sewn and joined to form a skin material (13) having a sewing line (15). a step of placing the skin material (13) on one side (20) of the crimping mold;
A core material (11) is set using the sewing line (15) as a mounting reference, is formed into a desired shape, and has a groove (11a) formed along the sewing line (15) of the skin material (13). A core material (11) with a pad material (12) on which a pad material (12) with cushioning properties is attached to one side of the core material (11).
By setting the material on the other side (21) of the crimping mold and clamping the crimping molds (20, 21), the skin material (13) and the core with padding material (12) are formed. The material (11) is crimped and integrated with the material (11) via an adhesive, and the thickness of the wrapped portion (16) of the skin material (13) along the sewing line (15) is adjusted by the groove portion (11a) of the core material (11). A method for manufacturing an automobile interior part, characterized in that it is made to escape.