JPH05116222A - Continuous series fusion method for continuous synthetic extrusion molded product - Google Patents

Abstract

PURPOSE:To manufacture continuous synthetic resin extrusion molded products classified in color continuously and inexpensively in uniform cementing and without damaging the outer appearance by heating a metal heating plate by high frequency induction heating, physical surface heating or the like and fusing the synthetic resin molded products by the conduction and radiation heat of said heating plate. CONSTITUTION:Respective materials are carried to a heating roller 7 or a heating plate with comb-tooth-shaped projections 8 heated by the high frequency induction, some other physical surface heating method for the like. The outer peripheral side faces to be fused of respective materials are made in the semi- molten state by the heat conduction applied at the time of passing said roller or heating plate. Then the materials are carried to a pressure roller 10 before the outer peripheral side faces of respective materials are solidified. The respective materials are arranged in the given positions while respective side faces in the semi-molten state are brought into contact each other. Finally the fusing is completed by products of synthetic resin continuous extrusion molded products classified in color can be manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fusing synthetic resin rods and tubes, and more particularly to a method for fusing tape electric wires in which a plurality of resin-coated electric wires of different colors are arranged in parallel. Regarding

[0002]

2. Description of the Related Art At present, when a long synthetic resin rod and side surfaces of a pipe are continuously connected, and a parallel molded product in which each one has a different color is manufactured, one extrusion molding is performed. It is impossible to mold in one step with a machine. Therefore, in order to manufacture such a molded product, there is a method in which one extruding machine for each color is used, and the raw materials in a semi-molten state immediately after extrusion are pressed against each other, whereby the side surfaces are fused together. Be taken. However, this method requires one extrusion molding machine for each color, so in terms of equipment and cost, the number of materials that can actually be connected in parallel and continuously is at most 2-3. is there. Therefore, in order to manufacture products with a greater number of colors and numbers, materials that have been molded separately and have different colors are juxtaposed in parallel, and the side surfaces are bonded together using an adhesive, or monochromatic parallel molding is performed. The method is to change the color one by one by painting things. However, according to the method using the above-mentioned adhesive, the thinner the material, the more difficult it is to apply the adhesive, and the problem of appearance after drying tends to occur, and in the case of painting, the color of the cross section and side of the molded product is different. The value as a product decreases. In addition, manufacturing costs increase due to the large number of facilities and processes.

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The present inventor has conducted extensive studies on a method of continuously joining the sides of a long rod made of synthetic resin and a tubular body, and as a result, high frequency induction heating,
Other parallel molded products of rod-shaped and tubular synthetic resins that do not impair the appearance by melting and pressure bonding using a metal plate or rollers with comb-shaped protrusions that are heated by a physical surface heating method and at a low cost The present invention has been completed by finding out a method for manufacturing

[0004]

That is, according to the present invention, a metal plate or a roller having comb teeth-like projections is heated by high-frequency induction heating or other physical surface heating method to obtain a long length such as a vinyl hose or a resin-coated electric wire. This is a method in which a rod of synthetic resin and a tubular body of length are fused in parallel and continuously. To explain this fusion method in more detail, first, prepare a necessary number of long-sized extruded products made of synthetic resin of different colors to be wound up on a bobbin etc., draw them out, and then align them. Aligned to a given pitch by passing through. Next, each material is sent to a heating roller or a heating plate with comb-shaped projections that are heated by high-frequency induction or other physical surface heating method, and the heat conduction received when passing through each material melts each material. The outer peripheral side surface to be worn is put in a semi-molten state. Then, before the outer peripheral side surface of each material is solidified again, it is fed into the pressure bonding roller. Here, the respective materials are aligned in a predetermined position while the side surfaces in the semi-molten state are pressed against each other. Finally, the fusion is completed by cooling the press-contacted portion, and a continuous parallel molded product of synthetic resin-made long extrusion molded products of different colors can be obtained. The alignment roller, the heating roller having comb-shaped projections, the heating plate, and the pressure bonding roller can be adjusted in pitch and heating temperature in accordance with the size and melting temperature of the resin to be processed.

[0005]

EFFECTS OF THE INVENTION According to the present invention, continuous long continuous synthetic resin extruded products of different colors can be continuously joined in a uniform joined state without spoiling the appearance due to contamination with an adhesive or the like and without requiring large-scale equipment. It is possible to manufacture various parallel fusion products.

[0006]

EXAMPLES In the following, as an example according to the present invention, a continuous parallel fusion method of PVC-coated electric wires, that is, a plurality of single PVC-coated electric wires are fused in parallel to form a ribbon electric wire or a tape electric wire. A method of manufacturing an electric wire, which is referred to as "," will be described in detail with reference to the accompanying drawings. FIG. 1 shows the structure of the parallel fusion method according to the present invention, and FIGS. 2 and 3 show a heating roller having a comb-shaped projection and a high-frequency induction heating coil. In FIG. 1, five PVC-coated electric wires 1 each having an outer diameter of 3.28 mm, which are different in color, are drawn out from each bobbin 2 as a raw material, and the guide roller 3 once adjusts the intervals and directions, and the alignment rollers 4 are sequentially arranged. Sent to. Separately from this, the high frequency oscillator 5
From the high frequency induction heating coil 6 is supplied with high frequency power of 30 kHz and 800 W, and the comb-shaped projections 8 of the heating roller 7 are heated to 165 ° C. ± 10 ° C. by induction heating. Then, the aligned PVC-covered electric wires coming out of the aligning roller 4 are fed into the heating roller 7, and when passing through the heating roller 7, the heat of the comb-shaped projections 8 makes contact with the PVC-covered electric wires. Becomes a semi-molten state. Here, as shown in FIG. 2, the comb-shaped projection 8 of the heating roller 7 is provided with a groove on the outer periphery thereof in accordance with the wire diameter of the PVC-coated electric wire 1, and when the electric wire passes through this groove. By direct heat conduction, it is possible to heat only the portion necessary for fusion bonding. In addition, the comb tooth-shaped protrusion 8 is P
It is coated with a corrosion resistant metal, ceramics or the like so as not to be attacked by a corrosive gas such as chlorine gas generated when the VC melts, and has a scraper 9 for scraping off the adhered PVC. Next, the PVC coated electric wires whose outer peripheral side surfaces are in a semi-molten state by the heating roller 7 are immediately and sequentially fed to the pressure bonding roller 10,
While being aligned, the adjacent semi-molten side surfaces are pressed against each other. Then, while maintaining this pitch, it is immediately cooled by the air blower 11 to solidify the semi-molten PVC of the respective joint surfaces, whereby they are continuously fused in parallel. That is, a 5-core PVC-coated tape electric wire in which the color of each element wire is different can be obtained.

[0007]

[Effects of the Invention] That is, according to the present invention, a PVC-coated tape electric wire in which the color of the coating resin itself of each element wire is different, and in a state of uniform joining, there is no stain or the like in the vicinity of the joining portion due to an adhesive or the like. It was possible to easily and inexpensively manufacture without requiring large-scale equipment.

[Brief description of drawings]

FIG. 1 shows the configuration of the parallel fusion method described in the embodiment of the present invention.

FIG. 1 is a conceptual diagram of a heating roller having comb-shaped projections and a coil for high-frequency induction heating according to the parallel fusion method described in the embodiment of the present invention.

FIG. 1 is a perspective view of a heating roller having comb-shaped projections and a coil for high-frequency induction heating according to the parallel fusion method described in the embodiment of the present invention.

[Explanation of symbols]

 1 ………… PVC coated wire 2 ………… Bobbin 3 ………… Guide roller 4 ………… Aligning roller 5 ………… High frequency oscillator 6 ………… High frequency induction heating coil 7 ………… Heating Roller 8 ………… Comb-shaped protrusion 9 ………… Scraper 10 ………… Crimping roller 11 ………… Air blower

Claims (2)

[Claims] 1. A synthetic resin rod and tube, characterized in that a metallic heating plate is heated by high-frequency induction heating or other physical surface heating method and the synthetic resin molded product is fused by conduction and radiant heat. Parallel fusion method. 2. The high frequency induction heating according to claim 1,
When performing parallel fusion of synthetic resin rods and tubes by other methods such as physical surface heating, multiple workpieces are arranged in parallel by aligning rollers and heated by high frequency induction heating or other physical surface heating methods. The side surface of each workpiece is melted by a melting roller having a comb-shaped protrusion as a heating plate, and the side surfaces in the molten state are pressed against each other when passing through the pressure bonding roller to perform fusion bonding. A method for parallel fusion bonding of a synthetic resin rod body and a tubular body.