JPH08309700A - Fusing work method for synthetic fiber cloth composed mainly of thermoplastic synthetic resin - Google Patents

Abstract

PURPOSE: To easily and quickly perform fusing work with an accurate neat section, by interrupting a high frequency current to stop having action when a fusing work part is completed, decreasing an edge point temperature lower than a cloth plasticizing temperature to make solidifying, and forming a fusion solidified layer on a fusing part. CONSTITUTION: By advance/retreat moving a press ram 4, a tip end of an edged tool 5 is pressed to a fused workpiece 7 of synthetic fiber, to allow a high frequency induction current to flow, and an edge point part is heated rapidly to a thermoplastic temperature, to perform fusing work of the workpiece 7. Next, operating a high frequency power unit A is stopped to interrupt the high frequency current, so as to stop heating the edged tool 5. According to this action, an edge point temperature is decreased lower than a cloth plasicizing temperature by heat conduction and radiation, and a temperature in a cloth cut section is decreased lower than the plasticizing temperature, to solidify the workpiece. In this way, a fusion solidified layer 9 is formed on a fusing part, to prevent fraying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a method for fusing synthetic fiber cloth mainly composed of thermoplastic synthetic resin.

[0002]

2. Description of the Related Art For example, synthetic fiber cloths for automobile airbags are made of ultrafine fibers, so when the inflator hole is cut by punching with a blade, which is the most common means, fine fibers remain and are cut cleanly. Couldn't hope. In addition, a method of cutting that includes a large extra band portion is adopted because fraying (unraveling) starts from the cut surface. Further, the central portion of the synthetic fiber cloth is manufactured by stacking a plurality of cloths (about 4 sheets) for connection with the gas generator. Also, the current method is punching and cutting with a combination of mechanical press and blade, but it can not be cut cleanly,
A plurality of (four-fold) cloths were also separated from each other, had no strength, and frayed from the cut surface.
Furthermore, in general, when this kind of synthetic fiber cloth material is cut by a shearing load in a certain direction, not only is it difficult to deform the cut surface, but it is impossible to expect accurate cutting.

[0003]

At present, the fusing process is carried out by tracing the periphery of the hole in the leather processing, but the working time is considerably long, and it is inevitable that the welding of four sheets becomes impossible. Further, in the electrothermal press type processing method, since the hot platen press is used, the scraps in which the thermoplastic fibers are melted stick to the cutting edge, and it is not possible to perform clean hole processing. The present invention has been made in view of the above, and an object of the present invention is to provide an apparatus for performing a fusion cutting method of a synthetic fiber cloth capable of performing accurate and clean cut welding easily and quickly. .

[0004]

The present invention has been made to solve the above problems, and its gist is to provide a metal blade provided on the press side or the base side, The tip of the blade consists of a high-frequency induction heating device with induction coils on one or both sides, and the forward and backward movement of the press ram presses the blade tip against the material to be melted of synthetic fiber cloth mainly composed of thermoplastic synthetic resin to induce high-frequency induction current. And the blade edge is rapidly heated to the thermoplastic temperature to heat the material to be melted, and the melting and solidification layer is formed on the melted portion to perform welding and fray-stopping processing at the same time. This is a method for fusing synthetic fiber cloth mainly composed of synthetic resin. Next, the present invention will be described in detail with reference to the following embodiments with reference to the drawings.

[0005]

EXAMPLE 5 is a metal cutter provided on the press ram 4 side (FIGS. 1 and 3) or the base 6 side (FIG. 2) of the fusing press 1. The blade 5 in FIGS. 1 and 2 has a cylindrical shape, and the blade 5 in FIG. 3 is a vertical straight blade. 3 is press frame 2
It is a cylinder attached to. A is a high-frequency induction machining heat device in which the induction coil 8 is arranged on one side or both sides of the tip of the blade 5. In the present invention, however, the tip of the blade 5 is pressed against the material 7 to be melted of synthetic fiber cloth mainly composed of thermoplastic synthetic resin by advancing and retracting the press ram 4, and a high frequency induction current is caused to flow, and the blade tip portion is rapidly heated to the thermoplastic temperature. A synthetic fiber cloth mainly composed of a thermoplastic synthetic resin, characterized in that the material is to be melt-fused by rising and is heated, and the melted and solidified layer 9 is formed on the melt-fused portion at the same time. It is a fusion cutting method.

[0006]

Next, the working state of the fusing method according to the present invention is shown in FIGS.
Will be sequentially described in detail. First, the tip of the blade 5 is pressed against the surface of the material 7 to be melted from the state of (Fig.
B) Press on the fabric. Then, the high frequency power supply is operated to provide the high frequency power to the induction coil installed around the cutting edge. Then, the cutting edge temperature is rapidly raised by the high frequency induction heating action. Then, when the temperature of the cutting edge reaches the thermoplastic temperature of the cloth, the cutting edge advances, and the cloth is dented and cuts. (The cutting edge temperature is equal to or higher than the plastic temperature of the cloth) And when the cutting edge penetrates the cloth and reaches the bottom (that is, when the cutting operation is completed), the operation of the high frequency power supply device is stopped, the high frequency current is cut off, and the heating operation is stopped. . Then, the temperature of the cutting edge becomes lower than the plastic temperature of the cloth due to heat conduction and radiant heat. Therefore, the temperature of the cut surface of the fabric becomes lower than the plasticizing temperature and solidifies. Then, when the press is operated to remove the cutting edge from the cloth, a plurality of pieces of the welded cut surface of the cloth are obtained in the cross section. And the present invention is characterized in that the temperature of the cutting edge is changed from room temperature to high temperature by high frequency induction heating during one process, and then returned to normal temperature by temperature decrease due to heat radiation, so that the temperature is changed during one process. is there.

[0007]

EFFECTS OF THE INVENTION By applying a high frequency induction current, the cutting edge portion is rapidly heated to a thermoplastic temperature to heat the material 7 to be melted, and the welding and fray stop processing for forming the melted and solidified layer 9 on the melted portion. Can be done at the same time.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of an apparatus for carrying out the present invention.

FIG. 2 is an explanatory view of another embodiment of the device of the present invention.

FIG. 3 is an explanatory view of another embodiment of the device of the present invention.

FIG. 4 is a process explanatory diagram of the present invention.

FIG. 5 is an explanatory view of a fusing processing portion of the present invention.

FIG. 6 is another explanatory view of the fusing processing portion of the present invention.

[Explanation of Codes] A High-frequency induction heating device 1 Fusing press 2 Frame 3 Cylinder 4 Press ram 5 Blade 6 Base 7 Fusing material 8 Induction coil 9 Melt solidification layer 10 Fusing inflator hole 11 Fusing

Claims (1)

[Claims] Metal blade 5 provided on the press ram 4 side or the base 6 side
And an induction coil 8 on one or both ends of the blade 5.
And a high-frequency induction heating device A in which the press ram 4 is moved forward and backward, the tip of the blade 5 is pressed against the material 7 to be melted of synthetic fiber cloth mainly composed of thermoplastic synthetic resin, and a high-frequency induction current is caused to flow to the blade tip portion. When the material to be melted is melted, the material to be melted is rapidly melted by heating up to the thermoplastic temperature, and when the melt-cutting portion is completed, the operation of the high frequency power supply is stopped and the high frequency current is cut off to stop the heating operation and the cutting edge temperature A composite mainly composed of a thermoplastic synthetic resin characterized by lowering the fabric plasticizing temperature to be solidified by heat conduction and heat radiation and solidifying it, and simultaneously performing welding and fray-stopping processing by forming a melted and solidified layer 9 on a fusing part. A method of fusing and cutting fiber cloth.