JPH0664487A - Internal parts for automobile and their manufacture - Google Patents

Abstract

PURPOSE:To prevent a fraying of a decoration sheet terminal so as to improve the appearance, as well as to improve the trim cut workability of the decoration sheet. CONSTITUTION:By inserting a low melting point resin sheet 54 at the front surface or the rear surface of a decoration sheet 30, the thermal fusion processing property in a thermal fusion cutting process with a thermal fusion cutting edge 52 is improved so as to carry out the cutting work smoothly, and at the same time, the fused resin of the low melting point resin sheet 54 is solidified so as to function as a binder to combine the cutting ends of the decoration sheet, and a fraying of the cloth is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile interior part such as an automobile door trim and a method for manufacturing the same, and more particularly to an automobile interior in which a terminal treatment of a decorative sheet can be performed cleanly and efficiently. The present invention relates to a component and a manufacturing method thereof.

[0002]

2. Description of the Related Art Recently, in order to improve the comfortability of the interior of an automobile, there has been a method of upgrading the material of interior parts such as an automobile door trim or installing a decorative sheet such as a cloth at a predetermined position on the surface of the door trim. Being tried.

9 and 10 show an outline of an automobile door trim. An automobile door trim 1 is formed by adhering a skin material 3 to a surface of a core material 2 formed into a required shape. The door trim body 4 is composed of a door trim body 4 and a decorative sheet 5 such as a cloth, which is attached to the door trim body 4 to impart a decorative property to a predetermined place on the surface.

As a material for the decorative sheet 5, a cushion material 7 is provided on the back surface of the cloth 6 which has an excellent surface appearance and feel.
Is used to improve the decorative property and the cushioning property. As a method of mounting the decorative sheet 5, the following method has been conventionally practiced.

First, as shown in FIG. 11, a lower die 8 for crimping is used.
After placing the decorative sheet 5 with the peripheral edge clamped on the mold surface, the crimping upper mold 9 on which the door trim body 4 is set is lowered, and the crimping upper and lower molds 8 and 9 are attached to the door trim body 4. Then, the decorative sheet 5 is pressure bonded.

Further, as shown in FIG. 12, in a state where the decorative sheet 5 is pressure-bonded to the door trim main body 4, the hot-melt cutting blade 8a provided along the outer periphery of the lower pressure-bonding die 8 is raised. After cutting the decorative sheet 5 along the outer peripheral trim cut shape, the wood grain filling bar 8b installed between the lower crimping die 8 and the hot-melt cutting blade 8a rises and is formed on the door trim body 4. The actual condition is that the cut peripheral edge portion 5a of the decorative sheet 5 is press-fitted into the wood-grooving groove portion 4a to perform the terminal treatment of the decorative sheet 5.

[0007]

As described above, conventionally, in the door trim 1 for an automobile in which the decorative sheet 5 is mounted on an appropriate place on the surface, the cloth 6 is usually used as the material of the decorative sheet 5. As shown in FIG. 13, as a structural property of the cloth 6, defects such as thread fraying and missing of the end of the cloth 6 occur at the cut portion of the cloth 6, and the frayed portion of the cloth 6 from the groove portion 4a for wood grain is external. It has been pointed out that there is a problem that the external appearance is significantly degraded, such as when exposed to the outside.

Further, when the structure of the cloth 6 is thick, or when the cloth fiber is thick, it is difficult to transfer the heat from the hot-melt cutting blade 8a, the cutting property becomes very poor, and good cutting cannot be expected. It has been pointed out that the cutting work must be performed in a separate process and the workability is deteriorated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an interior part for an automobile in which a trim body is fitted with a decorative sheet made of cloth, and its manufacture. In the method, it is an object of the present invention to provide an automobile interior part that improves cuttability of a decorative sheet, can completely prevent thread fraying of a cloth, and improves appearance of a terminal portion of the decorative sheet, and a manufacturing method thereof.

[0010]

In order to achieve the above object, the present invention comprises a trim main body formed in a required shape and a decorative sheet attached to a predetermined position on the surface of the trim main body. In the interior part for an automobile in which the terminal portion of the decorative sheet is inserted and fixed in the groove portion for wood grain provided in the decorative sheet, the decorative sheet is made of cloth, and the molten resin is adhered and solidified along the terminal portion. Thus, the fibers at the ends of the cloth are bonded together.

Further, in the method for manufacturing an automobile interior part according to the present invention, the trim body molded into a required shape is set on the mold surface of the crimping upper mold, and the decorative sheet is set on the crimping lower mold. By the process of crimping the decorative sheet by pressing the upper and lower molds for crimping, the decorative sheet is crimped to a predetermined position on the surface of the trim body, and by the hot-melt cutting blade for cutting, which is arranged on the outer periphery of the lower mold for crimping At the time of hot-melt cutting along the trim cut shape of the decorative sheet, the low-melting resin sheet is inserted along the cut portion of the decorative sheet, so that the low-melting resin sheet is inserted along the cut portion of the decorative sheet. The sheet melts and the molten resin adheres to and solidifies at the ends of the decorative sheet, and the decorative sheet heat-fusing step, and the vertical movement of the wood grain bar arranged between the lower crimping die and the heat-fusing blade. Due to And Kimekomi for step of press-fitting the terminal portion of the decorative sheet of the trim body Kimekomi for the groove, that it consists characterized.

[0012]

As is apparent from the above construction, when the decorative sheet is heat-fused, the low-melting resin sheet interposed on the front surface side or the back surface side of the decorative sheet is melted and solidified,
Acts as a binder that binds the fibers of the cloth together,
No fraying of the cloth will occur.

Further, although the hot-melt cutting blade does not come into full contact with the uneven cloth, the low melting point resin material is impregnated and solidified in the cloth end, so that heat is easily transferred and the cutting property is improved.

Further, the low melting point resin sheet can be set only in an arbitrary part.

[0015]

Embodiments of an automobile interior part and a method of manufacturing the same according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing an automobile door trim according to an embodiment of the present invention, FIG. 2 is a sectional view showing the structure of the automobile door trim, and FIGS. 3 to 6 are diagrams showing a method for manufacturing the automobile door trim. Sectional views showing respective steps, and FIGS. 7 and 8 are sectional views showing another embodiment of the method of the present invention.

1 and 2, an automobile door trim 10 is roughly composed of a door trim main body 20 formed into a required curved surface shape and a decorative sheet 30 attached to a predetermined surface portion of the door trim main body 20. ing.

More specifically, the door trim body 20 described above.
Is composed of a core material 21 made of a wood fiber board or the like thermoformed into a required shape, and a skin material 22 integrally attached to the surface side of the core material 21 by vacuum molding or the like.
Is a laminated body in which a foam layer such as polypropylene foam or polyethylene foam is laminated on the back surface of a skin sheet such as an ABS mixed PVC sheet.

The door trim main body 20 is provided with a wood grain groove 23 along the peripheral shape of the decorative sheet 30. The wood grain groove 23 is formed at the same time when the core 21 is press-molded.

On the other hand, the decorative sheet 30 is a cloth 31 of arbitrary specifications such as velvet, jersey, tricot, and moquette.
And a cushioning material 32 such as polyurethane foam laminated on the back surface of the cloth 31,
Due to the effect of the external appearance of the skin material 22 and the decorative sheet 30, the design of the product is improved and the cushion material 32 is used.
It also improves the buffering property.

In addition, the peripheral edge portion 3 of the decorative sheet 30.
3 is press-fitted into the wood graining groove 23 formed in the door trim main body 20 to be subjected to the terminal treatment. The molten resin 55 is impregnated and solidified in the terminal portion 33. By functioning as a binder, the cloth 31 can be reliably prevented from fraying, and the decorative sheet 30
The appearance of the peripheral edge part has been improved.

Next, with reference to FIGS. 3 to 6, the decorative sheet 3 will be described with respect to the method of manufacturing the automobile door trim 10.
The terminal processing method of 0 will be mainly described.

First, as shown in FIG. 3, the upper die 40 for pressure bonding is used.
A state in which the door trim main body 20 is temporarily fixed and set on the mold surface, and the peripheral edge portion of the decorative sheet 30 is held by the clamp device 60 between the upper crimping die 40 and the lower crimping die 50 located therebelow. Set with.

The lower die 50 for crimping has an outer shape slightly smaller than the outer shape of the groove portion 23 for graining. The outer periphery of the lower die 50 for crimping has a grain-filling bar 51 and a heat fusing blade 52. The sheet holding bar 53 is set, and the PV is formed by the wood grain filling bar 51 and the sheet holding bar 53.
A low melting point resin sheet 54 such as a C sheet is placed.

It should be noted that the grain-filling bar 51 and the heat fusing blade 52
Each of them is connected by a drive cylinder so as to be vertically movable.

After the door trim body 20 and the decorative sheet 30 are set in the upper and lower crimping dies 40 and 50, respectively, as shown in FIG. With the engagement of 50, the door trim body 2
The decorative sheet 30 is pressure-bonded and integrated at a predetermined position on the surface of 0.

After that, as shown in FIG.
Is lifted by the operation of a drive cylinder (not shown) to perform thermal fusing along the trim cut shape of the decorative sheet 30. At this time, the low melting point resin sheet 54 is inserted on the surface side of the decorative sheet 30. The hot-melt cutting blade 52 contacts the surface of the low-melting point resin sheet 54,
Heat fusing.

At this time, since a large contact area can be secured between the tip of the heat melting blade 52 and the low melting point resin sheet 54, the heat from the heat melting blade 52 is easily transferred, and the low melting point resin sheet 5 is easily transferred.
4, the decorative sheet 30 can be satisfactorily fused by heat, and the cutability of the decorative sheet 30 is significantly improved.

After the decorative sheet 30 is cut, the molten resin 55 is solidified and functions as a binder for connecting the cut edges of the cloth 31, so that the cloth is not frayed at the terminal portion 33 of the decorative sheet 30. Defects can be effectively resolved.

Thereafter, as shown in FIG. 6, the wood graining bar 51 is lifted by the operation of a driving cylinder (not shown) to move the end portion 33 of the decorative sheet 30 to the door trim main body 2.
The door trim 10 is completely manufactured by press-fitting it into the 0-grain groove 23.

Next, FIGS. 7 and 8 show another embodiment of the method of the present invention. In this embodiment, the low melting point resin sheet 54 is set on the back surface side of the decorative sheet 30.

Also in this embodiment, the low-melting point resin sheet 54 improves the cuttability, and since it functions as a binder, it has the advantage that the fraying of the cloth 31 can be prevented, and the low-melting point resin sheet 54 is decorated. Since the low melting point resin sheet 54 is set on the back side of the sheet 30, the melted and solidified low melting point resin sheet 54 does not appear on the front side of the decorative sheet 30 and the appearance is further improved. Even if it is set to a rough surface, it does not adversely affect the appearance, so it has the effect that the setting work can be done quickly.

As described above, according to the method of the present invention, the low melting point resin sheet 54 is provided on the front surface side or the back surface side of the decorative sheet 30 when the decorative sheet 30 made of the cloth 31 is thermally fused.
By interposing, there is an advantage that the cut workability is improved and the thread fraying of the cloth 31 can be surely prevented.

Although the automobile door trim 10 and the manufacturing method thereof have been described above, the present invention is not limited to the automobile door trim 10 and can be applied to general interior parts such as a rear corner trim and the like, which are composed of a trim body and a decorative sheet.

[0035]

As described above, the present invention has the following special operational effects.

(1) The interior parts for automobiles according to the present invention are:
During trim cutting of the peripheral edge of the decorative sheet, the low melting point resin sheet inserted on the front or back side of the decorative sheet is melted, and this molten resin functions as a binder that connects the cut edges of the cloth. In addition, it is possible to surely prevent the yarn from being unraveled in the cloth, significantly improve the appearance of the peripheral edge portion of the decorative sheet, and improve the design of the product.

(2) According to the method of the present invention, when the decorative sheet is heat-fused, the cutability of the decorative sheet is remarkably improved by the low melting point resin sheet interposed on the front surface side or the back surface side of the decorative sheet, It is not necessary to perform the cutting process again, and the workability is significantly improved.

(3) According to the method of the present invention, in order to improve the hot-melt cutting workability of the decorative sheet, it is possible to set a cloth having a thick specification, and the selection of the cloth material used for the decorative sheet. This has the effect of greatly expanding the degree of freedom.

[Brief description of drawings]

FIG. 1 is a front view showing an automobile door trim to which the present invention is applied.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a cross-sectional view showing one step of the method of the present invention, showing a state where the door trim main body and the decorative sheet are set on the crimping device.

FIG. 4 is a cross-sectional view showing one step of the method of the present invention, showing a pressure-bonding step of the decorative sheet.

FIG. 5 is a cross-sectional view showing one step of the method of the present invention, showing the hot-melt cutting step.

FIG. 6 is a cross-sectional view showing one step of the method of the present invention, showing the wood graining step.

FIG. 7 is a cross-sectional view showing another embodiment of the method of the present invention, showing a thermal fusing step.

8 is a cross-sectional view showing a configuration of a terminal portion of the decorative sheet formed in the thermal fusing step shown in FIG.

FIG. 9 is a front view showing a conventional automobile door trim.

10 is a sectional view taken along line XX in FIG.

11 is a cross-sectional view showing a configuration of a crimping device for crimping a door trim body and a decorative sheet in the automobile door trim shown in FIG.

FIG. 12 is a cross-sectional view showing a conventional graining process of a decorative sheet.

FIG. 13 is an explanatory view showing a defect of a cloth used for a conventional decorative sheet.

[Explanation of symbols]

 10 Automotive Door Trim 20 Door Trim Body 21 Core Material 22 Skin Material 23 Groove for Wood Grain 30 Decorative Sheet 31 Cross 32 Cushion Material 33 Terminal 40 Crimping Upper Mold 50 Lower Crimping 51 Wood Grading Bar 52 Heat Fusing Blade 53 Sheet Holding Bar 54 Low melting point resin sheet

Claims (2)

[Claims] 1. A trim body (2) formed into a required shape.
0) and a decorative sheet (30) attached to a predetermined surface of the trim body (20).
In the interior part for an automobile, wherein the terminal portion (33) of the decorative sheet (30) is inserted and fixed in the groove portion (23) for wood grain provided in 0), the decorative sheet (30) is composed of a cloth (31). In addition, the molten resin (55) is adhered and solidified along the end portion (33) to thereby form the cloth (31).
An interior part for an automobile, characterized in that the fibers of the terminal portion (33) are bonded together. 2. A trim body (20) and a decorative sheet (3)
0) and the end portion (3) of the decorative sheet (30) in the wood grain groove (23) provided in the trim body (20).
In the method for manufacturing an automobile interior part in which 3) is inserted and fixed, a trim body (20) having a required shape is set on the mold surface of the crimping upper mold (40) and the crimping lower mold ( A decorative sheet (30) is set in (50), and the decorative sheet (30) is crimped to a predetermined position on the surface of the trim body (20) by engaging the upper and lower crimping dies (40, 50); During the hot-melt cutting processing along the trim cut shape of the decorative sheet (30) by the vertically movable hot-melt cutting blade (52), which is arranged on the outer periphery of the pressure bonding lower die (50), the decorative sheet (30) cut portion A low melting point resin sheet (5
4) is inserted, so that the decorative sheet (30)
A low melting point resin sheet (54) is melted along the cut portion of the sheet, and the molten resin (55) is adhered and solidified to the end portion of the decorative sheet (30). The end portion (33) of the decorative sheet (30) is moved to the trim body (20) by the vertical movement of the wood grain filling bar (51) arranged between the (50) and the heat fusing blade (52).
A wood graining step of press-fitting into the wood grain groove (23), and a method for producing an automobile interior part.