JPS6137529A - Method of treating terminal end of sheet-like material - Google Patents

Abstract

PURPOSE:To enhance the working efficiency and material effecienty of terminal end treatment of a sheet-like material, by utilizing a high-frequency welder to form a trimmed section. CONSTITUTION:PCV sol 30 is charged into a recess 13 in an insulation die 12. Then a carpet 31 is set on the insulation die 12. Next an upper die 20 is lowered to set a convex part 22 of an electrode 21 on the terminal end of the carpet 31. In this condition a high-frequency wave electrical field is extablished between electrodes 11, 21. With this arrangement mirco-powder particles in the PVC sol are dissolved and melted together with a liquid plastic material, which is then welded to the carpet. After the melted material is solidified, a trimmed part 33 is formed, and thereafter the upper die 20 is raised to take up the carpet 30. The carpet 30 after terminal end treatment is provided with the annular trimmed section 33 at its terminal end part, and therefore, after napping, the borders of bristles thereon may be lined up, thereby an ornamental effect may be given to the carpet 30.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for treating the ends of sheet materials used for automobile interiors and the like.

(Prior Art) Various methods have been developed for end treatment of sheet materials used for automobile interiors, etc.For example,
There is a method in which annular PvC sheets are sewn around the entire circumference of the end portion of a carpella (sheet-like material) to form a border. However, this method requires sewing work, resulting in poor workability.

Also, there is a slightly wider PV on the carpet.

By overlapping the C sheets and welding the entire circumference of the end portion of the carpet to the corresponding PVC sheet using a high-frequency welder, a edging portion is formed, and the center portion of the PvC sheet is separated and removed (there is also a method). Although this method improved workability, material efficiency was very poor because the wide center part of the PvC sheet was discarded.
.

(Problems to be Solved by the Invention) Therefore, the development of a terminal processing method with good workability and high material efficiency has been awaited.

(Means for solving the problems) The present invention has been made to solve the above problems, and its gist is that the four parts formed on the lower mold of a high-frequency welder are heated by a high-frequency electric field. Fill the material in an amorphous state that can be melted, place the end part of the sheet-like material on top of this, move the two molds of the high-frequency welder relative to the lower mold, and apply a high-frequency electric field to the edges. A method for processing the ends of a sheet-like article is provided.

(Example) First, an example of a high frequency welder for carrying out the method of the present invention will be described with reference to the drawings. In the figure, 1 ( ) is a lower mold, and 20 is an upper mold. The lower mold 10 includes an electrode 11 and an insulating mold 1 made of silicon, for example, placed on the electrode 11.
2. On the upper surface side of the insulating mold 12, four shallow annular portions 13 are formed. The four parts 13 have a planar shape corresponding to the outer shape of the lower part of the door trim 40 as shown in FIG. 3, for example. At the bottom of the concave portion 13, minute irregularities 14 forming a diaphragm pattern are formed. Also,
On the upper surface side of the insulating mold 12, a recess 15 is formed in a region surrounded by the recess 13. The recess 15 is formed deeper than the recess 13.

The upper mold 20 also has electrodes 21 . On the lower surface side of this electrode 21, an annular i-shaped convex portion 22 is provided in a T-shape opposite to the four portions 13.
& has been. A high frequency oscillator 25 is connected to the electrode 11.21.
is connected.

The method of the present invention is carried out using the above-mentioned high frequency welder. First, the recess 13 of the insulating mold 12 is filled with P■C sol 30 (an amorphous material that can be melted by a high-frequency electric field). Note that the PVC sol 30 is made by mixing P V Ci powder in a liquid plastic material.

After filling the PVC sol 30, a carpet 31 (sheet-shaped material) is placed on the insulation mold 12. At this time, the carpet 31 has the raised nap 32 on the lower side, the end portions of the carpet 31 are located in the recess 13 along the entire circumference, and the center portion is located in the recess 15. Note that the end portion of the carpet 31 does not cover the entire area of the four portions 13, but covers a portion closer to the center of the recessed portion 13.

Next, the upper mold 20 is lowered and the convex portion 22 of the electrode 21 is placed on the end portion of the carpet 31. In this state, electrode 1
1. Apply a high frequency electric field between 1.21 and 21.

As a result, the fine powder in the PVC sol 30 is melted and combined with the liquid plasticizer, and is welded to the carpet 31. When this molten material solidifies, an edge portion 33 is formed as shown in FIG. 2. In addition, when the nap 32 at the end of the carpet 31 is folded down, the edging part 33
integrated with.

After this, the upper mold 20 is raised and the carpet 3 ( ) is taken out. The carpet 30 after the end treatment has a structure in which an annular edging part 33 is provided at the end part, so that fraying of the end part can be prevented, and the hairline of the nap 32 can be made even, so that a decorative effect can be obtained. In addition, the edging part 3
3 has a shibori pattern, so the decorative effect can be further enhanced.

The carpet 30 whose ends have been treated as described above is placed on the core material 41 of the door trim 40 as shown in FIGS. 3 and 4. That is, a portion of the edging portion 33 is wrapped around the end portion of the core material 41 and adhered to the back surface of the core material 41, and the pond portion of the edging portion 33 is adhered to the front surface of the core material 41. In this way, the interior of the lower part of the door trim 40 is crushed.

The present invention is not limited to the above-mentioned embodiments, and various embodiments are possible. For example, various materials can be selected for the PvC pond as materials that can be melted by a high frequency electric field. Further, in the above embodiments, a material in a sol state or a state is used, but it is also possible to use a material in an amorphous state such as a powder material.

Also, as a sheet-like material, Torifoot in the carpet pond,
A sheet such as a knitted fabric or PVC may also be used.

The sheet-like material may be a material that is melted by a high-frequency electric field, or may be a material that does not melt.

The embodiment shown in FIGS. 5 and 6 shows an example in which the present invention is applied to the interior of a sun visor 50. That is, a tricot 51 is used as the sheet-like material, and a edging portion 52 is provided in the same manner as described above. Then, the steel wire (not shown) and the pad 53 are sandwiched between the two tricots 51 after the end treatment, and the edging portions 52 are welded and attached in this state to obtain the sun visor 50.

Further, the present invention can be applied even when the edging portion is not formed over the entire circumference of the end portion of the sheet-like object, but is formed on a part of the end portion.

Further, the present invention can be applied to automobile interiors such as floor mats, instrument panel pads, etc., and end treatment of sheet-like materials other than automobile interiors.

Effects of the invention (v) (As explained above, according to the present invention, the working efficiency is improved by forming the edging part using a high-frequency welder. In addition, only the part where the edging part is to be formed can be melted by the high-frequency electric field. Since the border is formed by arranging amorphous material, there is no waste of material and material efficiency can be improved.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the high-frequency welder showing the state immediately before end treatment, Figure 2 is a cross-sectional view of the sheet material after end treatment, and Figure 3 is a front view of the lower part of the door trim to which the sheet material in Figure 2 is applied. Figure 4 is a sectional view taken along line IV-IV in Figure f:IS3, Figure 5 is a front view of a sun visor showing an example of application of the pond of the present invention, and Figure 6 is a cross-sectional view taken along line IV-IV in Figure 5. It is a sectional view along a line. DESCRIPTION OF SYMBOLS 10... Lower mold, 11... Electrode, 13... Recessed part, 2
0...Upper mold, 21...Electrode, 25...High frequency oscillation (number), 30...Amorphous material that can be melted by high frequency electric field (PVCVCl231.51...Sheet-like material (carpet) , 33.52...Edging part

Claims (1)

[Claims] The recess formed in the lower mold of the high-frequency welder is filled with an amorphous material that can be melted by a high-frequency electric field, and the end of the sheet material is placed on top of this, and the upper mold of the high-frequency welder is moved relative to the lower mold. A method for processing an end of a sheet-like material, the method comprising forming a border by moving the material and applying a high-frequency electric field.