JPS613730A - Manufacture of interior decoration material for motor vehicle - Google Patents

Abstract

PURPOSE:To improve appearance by making working process into a short period of time, by performing cut-off of roll-in allowance for application of an interior decoration material to the back of a core material by rolling the interior decoration material in the back of the core material by ultrasonic processing, in a manufacturing process of the interior decoration material such as a door trim to be obtained by making use of cloth for a skin material. CONSTITUTION:A roll-in allowance 3a is formed unitarily with cloth 3 so that the external circumference of an opening part 2 for opening and closing knob of a door provided on a core material 4 is covered with the roll-in allowance 3a. Slits 3b are provided on four corners of the roll-in allowance 3a of this kind through ultrasonic processing. As for the ultrasonic processing, the roll-in allowance 3a is mounted on a mount 7, a ultrasonic generator 6 is set correspondingly to a notched line L of a slit and cut-off of cloth is performed by making a ultrasonic wave generated for 2-3 seconds. In addition to the above, the roll-in allowance 3a is rolled in the back 4a of the core material 4 and applied to the back with an adhesive agent.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a method for manufacturing automobile interior materials, such as door trims, which mainly uses cloth as a skin material, and particularly relates to a method for producing interior materials for automobiles, such as door trims, using a cloth as a skin material, and in particular, a method for manufacturing an interior material for an automobile such as a door trim. , relates to a cloth that prevents the cloth from fraying, etc. in the step of providing a cut and slit and rolling it around the back surface of the core material and pasting it.

(Prior art and its problems) Traditionally, the door trims of some luxury passenger cars have used cloth as a decorative skin material, giving them a luxurious appearance and giving them an extremely pleasant feel to the touch. It is being

The manufacturing method for this product is to first form a core material made of hardboard etc. into a product shape, a pad material made of polyurethane foam etc., and a winding margin, and then laminate the back side with vinyl chloride etc. The cloth is laminated and welded by welder welding to form an integral piece, and an opening provided in the core material,
Alternatively, a door trim has been obtained by providing a slit with a cutter or the like in the winding margin of the cloth at the outer circumferential end so that the winding margin can be easily rolled into the back surface of the core material and then attached.

However, if a slit is made in the winding allowance with a cutter or the like as described above, the cut part of the cloth will be left uncut, and this part will fray and threads will come out on the surface, which is not desirable in terms of appearance. do not have.

For this reason, the conventional method was to iron the cut part and heat it to harden it. However, when ironing the cloth, it heats up too much and becomes carbonized, turning it black. It had been pointed out.

(Purpose of the Invention) The present invention provides a method for manufacturing interior materials for automobiles that is superior in appearance by preventing 1J tangles or carbonization darkening of cloth in the manufacturing process of interior materials such as door trims that use cloth as a surface material. It is about providing.

(Structure of the Invention) In order to achieve the above object, the present invention includes a core material, a pad material, and a wrapping margin that are formed in advance into a product shape, and a cloth whose back surface is laminated. In the manufacturing method, the manufacturing method includes a step of laminating and welding to form an integral piece by welder welding, and a step of cutting the winding margin to provide a slit, and rolling and pasting the winding margin to the back surface of the core material. The cutting process is performed by ultrasonic processing.

(Description of Examples) Hereinafter, an example of the process of manufacturing an automobile interior material based on the method of the present invention will be described.

1 and 3 show the manufacturing process of an automobile door trim. Reference numeral 1 indicates a door trim. This door trim 1 consists of a core material 4 made of hardboard or the like that has been formed into a product shape in advance, and a polyurethane foam. A pad material 5 made of a material such as a pad material 5, etc. is integrally formed with a winding margin 3a, and a pad material 5 whose back surface is laminated with vinyl chloride or the like is laminated, and these are integrally formed by welding or the like. It is what it is.

In FIG. 1, reference numeral 2 denotes an opening provided on the core material 4 to which the door opening/closing handle is attached, and in this opening 2, a winding margin 3a is connected to the cloth 3 so as to cover the outer periphery of the opening. It is formed in one piece.

]- In the door trim obtained as shown in FIG. 1, slits 3b are provided at the four corners of the winding allowance 3a by ultrasonic machining, corresponding to the shape of the opening 2.

The above-mentioned ultrasonic machining is carried out by placing the above-mentioned rolling allowance 3a on the mounting table 7 as shown in FIG. This method generates ultrasonic waves for 2 to 3 seconds to cut the cross.

Furthermore, as shown in FIG. 3, the first winding allowance 3a is wound around the back surface 4a of the core material 4 and is attached with an adhesive 8 or the like.

In the above embodiment, the opening was formed into a rectangular shape, but it goes without saying that the opening may have another shape such as a circle, and the method of the present invention is not limited to the above-mentioned opening. Of course, it can also be applied to cases where a slit is made in the outer skin made of cloth and wrapped around the back surface of the outer peripheral edge of the core material, and it can also be applied to other automotive interior materials other than door trims. Applicable.

(Effects of the Invention) As described above, in the manufacturing method of the present invention, the slits in the cross are formed by ultrasonic machining.
Step 2 of slit forming operation can be done in a short time.

Furthermore, since the cut portion of the cloth is properly heated and solidified, it is possible to prevent the cloth from fraying, and at the same time, it is possible to prevent the cloth from becoming carbonized and darkened due to overheating.

Therefore, it is an extremely effective method for manufacturing a door trim that can be completed in a short time and has an excellent appearance.

[Brief explanation of the drawing]

Figures 1 to 3 show the manufacturing process when the method of the present invention is applied to an automobile door trim, and Figure 1 is an explanatory diagram showing a state in which a slit is formed in the wrap-around area of the skin of the door trim. , FIG. 2 is an explanatory view showing a state in which a slit is formed by an ultrasonic processing process, and FIG. 3 is an enlarged sectional view showing a state in which a wrapping margin of the skin material is rolled up on the back side of the opening of the door trim. 33...Skin 3a...Envelope 311...Slit 5...Ultrasonic generator special R1 Applicant Kasai Kogyo Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] (1) A core material and a pad material that are pre-formed into a product shape,
A step of integrally forming a winding margin and laminating and welding a cloth whose back surface is laminated using welder welding, and a step of integrally forming the winding margin,
In a manufacturing method comprising the steps of cutting and providing slits, and rolling and pasting the core material on the back surface,
A method for manufacturing an interior material for an automobile, characterized in that the step of cutting the winding allowance is performed by ultrasonic processing.