JPH07119032A - Thermoplastic resin fusing machine and processing - Google Patents

Abstract

PURPOSE:To process chemical fibers in a desired form by providing the hot press surface of releasing properties and fusing or fuse-cutting chemical fibers with impulse power source. CONSTITUTION:The heat-resistant base plate 1 is grooved in a desired form 7 on its surface, and a resistance wire 5 is embedded in the groove 7. Then, a heat-resistant polyimide film 2 and glass fiber 3 are laminated on the surface, further a metal foil 4 is placed thereon to provide the hot press face. The impulse power is applied to the hot press to fuse or fuse-cut the chemical, fibers in a desired form.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic resin welding machine and a processing method for heat-welding or fusing a chemical fiber such as nylon 66 cloth or a sheet such as a thin plastic film by using an impulse heater. .

[0002] There are various types of thermoplastic resin products such as chemical fibers, non-woven fabrics, synthetic leather, synthetic leather, and film sheets. The methods of laminating and sealing these are hot press type, ultrasonic type, A wide variety of laminating and sealing machines such as laser type and impulse heater type are used, but the hot press type has adhesion and seizure phenomena on the die surface, and the ultrasonic type has a large difference in height on the same surface. Welding is difficult with soft materials because it absorbs vibration waves, and the laser method lacks strength because the resin is spot welded.
In the case of fiber, there is a problem with any method such as having no original effect of preventing fraying.

The impulse heater type of the stand type laminating seal machine shown in FIG. 4 is relatively satisfactory in the temperature condition, the welding surface and the welding cross section, but when the impulse heater wire is heated and welded, the heater wire is heated when the temperature rises. There is a problem in that the length of the heater wire is extended due to the linear expansion coefficient, and therefore it is necessary to apply tension to both of the heater wires to maintain linearity, and only a linear heater wire can be used. There was only a laminating and sealing machine that could form only a rectangular shape.

However, the market demand is not limited to the production of simply rectangular shaped workpieces, but there are few requests for processing complicated shapes such as glove-like shapes, and impulse heater type processing capable of handling all shapes. Development of the machine was desired.

[Problems to be Solved by the Invention] It is well known that a metal body such as a heater wire has a linear expansion coefficient in which the length thereof extends in the longitudinal direction when the temperature rises.
Therefore, if the length is suppressed to a certain length, a so-called bulging phenomenon that deforms into a wavy shape occurs. Therefore, in the impulse heater method, the heater wire must be tensioned from both sides to be maintained in a straight line shape. This is the reason why only shaped articles can be processed. In the impulse heater type laminating seal machine invented this time, by forming the heater wire in a coil shape, the expansion in the longitudinal direction due to the coefficient of linear expansion is absorbed within the coil diameter and embedded in the groove to fix the coil shape. By suppressing the overhang phenomenon, it is possible to manufacture articles that can be used in all shapes.

[Means for Solving the Problems] The present invention is
In order to process chemical fiber etc. into the desired shape, a plate-shaped substrate with heat resistance, a groove made in the shape to be processed and a coil-shaped high resistance wire embedded in the groove, and heat resistance on this high resistance wire By stacking a polyimido film and glass fiber, and further stacking a metal foil on it to form a hot-pressed surface, by heating with an impulse power source and fusing or fusing the chemical fiber etc. into a desired shape, this purpose is achieved. Achieved

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view for explaining a hot press surface which is a heating portion of a thermoplastic resin welding machine according to an embodiment of the present invention. FIG. 2 is a sectional view of a hot press surface according to the embodiment of the present invention. FIG. 3 is a perspective view showing a processed state of the thermoplastic resin welding machine according to the embodiment of the present invention.

FIG. 1 shows an essential part of the thermoplastic resin welding machine of the present invention, in which a plate-like substrate 1 having heat resistance is provided with a groove 7 for embedding a heater coil, and the coil is inserted in this groove. The high resistance wire 5 is embedded. The depth of the groove may be such that the head of the coil-shaped high resistance wire 5 slightly projects and the shape of the coil-shaped high resistance wire 5 can be retained. The plate-like substrate 1 may be made of any material as long as it has electrical insulation properties, withstands heat generation of the high resistance wire 5 and has strength enough to withstand a pressing pressure when processing the thermoplastic resin, for example. ,
A resin plate containing glass fibers, a laminated plate, gypsum, cement, a thermosetting urea resin which is a heat resistant resin, or the like may be used.

In the present embodiment, the heat generating portion uses a high resistance wire 5 wound in a round coil shape, and has a diameter of 1.5 to 2
Although a coil cross section of about m / m was used, the coil cross section is not limited to a round shape, and a coil cross section shape such as a square shape or a triangle shape may be adopted depending on the application. In particular, for the purpose of fusing, the high resistance wire 5 having a thin wire diameter, a round shape, and a triangular cross section is effective. In the case of welding, if it is desired to leave a lorelet-like trace at the welding site, High resistance wire 5 with a rectangular cross section, with coil pitch selected as required
Can be achieved by using.

Since the coil has a coiled shape, even if the temperature of the high resistance wire 5 rises, the expansion in the longitudinal direction due to the coefficient of linear expansion is absorbed in the radial direction of the coil, so that the overhang phenomenon does not occur. The elongation rate in the longitudinal direction is about 0.015%, and such an elongation rate has no effect on the finished product. Therefore, the high resistance wire 5 can be formed in any shape according to the shape of the groove, and the processing range is further expanded. Further, as the type of the wire material of the high resistance wire 5, any wire material such as nichrome wire, tungsten wire, stainless wire can be used.

The high resistance wire 5 is drawn out as a lead wire 8 from a through hole formed in the plate-shaped substrate 1, and an impulse power source 10 is provided.
Connected to and heated. Low temperature heating (150-18
In the case of 0 ^{° C.} or less, it is possible to process it together with a release agent, but the melting temperature of the chemical fiber such as nylon 66 cloth 13 is 260 ^{° C.,} and the plate-shaped substrate 1 of the present invention is used. When hot pressing is performed by using, the phenomenon that the nylon 66 cloth 13 is seized on the surface of the mold or stringing occurs.

In order to avoid this seizure phenomenon, a polyimide cloth or film 2 which is slightly inferior in peelability but has heat resistance to high temperature is pasted on the high resistance wire 5, and the heat resistant glass fiber 3 is laminated thereon. Further, a metal foil 5 having a thickness of several microns was further stacked thereon to form a hot-pressed surface. By forming such a hot press surface, nylon 66 cloth 13
Although the heat-resistant polyimide film 2 and the heat-resistant polyimide film 2 are of the same family, the hot-press surface is composed of a different substance because it is separated by the glass fiber 4 and the metal foil 5, and therefore the hot-press and release-resistant hot press film is formed. It becomes a face.

A case will be described in which a chemical fiber such as nylon 66 cloth 13 is processed using the plate-like substrate 1 having the above hot press surface. Nylon 66 cloth 1 to be processed on a plate-like substrate 1 having a hot press surface in which a coil-shaped high resistance wire 5 formed in a shape desired to be processed in nylon 66 cloth 13 is embedded.
One or more sheets 3 are placed, a pressing surface 9 having a relatively elastic pressing surface is placed thereon, and an impulse power source 10 is turned on. The pressure applied to the pressing surface is nylon 66 cloth 13
It suffices if the pressing force is such that the hot press surface and the hot press surface come into close contact with each other.

When the impulse power source 10 is turned on by appropriately adjusting the power source voltage, the coiled high resistance wire 5 generates heat, and the heat causes the nylon 66 cloth 13 to be welded or melted. Since the time required for processing can be shortened as the high voltage and the high current is applied, the existing DC high voltage method for capacitor storage is an effective heating method. Generally, the processing time is as short as 10 to 20 seconds, and after the electric current is cut off, it immediately drops to the normal temperature zone. Therefore, since it is cooled within a few seconds while being pressed, it is possible to prevent the occurrence of stringing or shrinkage. It has good properties, and since it is entirely processed, there is no fiber fraying. If you want to finish the work early, forced cooling is effective.

As described above as the embodiment, FIG.
-By using a plate-shaped substrate having a hot-pressed surface and an impulse power source shown in Fig. 3, it is possible to provide a chemical fiber processing machine which has good productivity in a short time and has no fiber fraying. Although circular processing is shown as an example, the processing shape is not limited to a circle at all, and even a complicated shape such as a glove can be easily processed if the hot press surface is manufactured into a required shape. is there. The chemical fiber to be processed has been explained using non-coated nylon 66 cloth, but it has been confirmed that it can also be processed to silicone rubber-coated or butyl rubber-coated nylon 66 cloth. For welding or fusing of chemical fiber or artificial leather, There are great expectations. Further, although it has been described with respect to processing into a chemical fiber such as nylon 66 cloth, application to a sheet of a thermoplastic resin such as a thin plastic film is also possible.

[Effects of the Invention] As described above as the embodiments, the thermoplastic resin welding machine using the plate-like substrate having the hot-pressed surface according to the present invention has the following advantages. Since the fraying of the chemical fiber and the pretreatment process such as coating and hoovering can be omitted, the productivity is improved and the finished product is improved. In addition, the chemical fiber can be easily processed into any shape, for example, a complicated shape such as a glove, and can be processed with high productivity in a short time. The power source used is not a special power source and does not use high frequencies, so that no radio wave interference or noise interference occurs, and no acoustic interference occurs because it is not an ultrasonic wave.

[Brief description of drawings]

FIG. 1 is a perspective view of a hot press surface of a thermoplastic resin welding machine according to an embodiment of the present invention.

FIG. 2 is a hot press surface sectional view of the thermoplastic resin welding machine according to the embodiment of the present invention.

FIG. 3 is an explanatory view of a working state of the thermoplastic resin welding machine according to the embodiment of the present invention.

FIG. 4 is a perspective view of a conventional stand-type laminate sealing machine.

[Explanation of symbols]

1: Plate substrate 2: Poly imido film (cloth) 3: Glass fiber 4: Metal foil 5: High resistance wire (coil) 6: High resistance wire (straight line) 7: Coil groove 8: Lead wire 9: Addition Pressure surface 10: Impulse power supply 11: Output adjuster 12: Stand type laminating seal machine 13: Nylon 66 cloth

Claims (3)

[Claims] 1. A thermoplastic resin welding machine having an impulse power source, a groove formed in a shape to be machined, and a hot-press surface formed of a coil-shaped high resistance wire embedded in the groove. 2. A thermoplastic resin composition according to claim 1, wherein the hot-pressed surface is formed by stacking a heat-resistant polyiminated film and glass fiber on a coiled high resistance wire, and further stacking a metal foil thereon. Resin welding machine. 3. The chemical fiber is placed on a hot-press surface processed into a desired shape, an impulse power source is applied to heat the coil-shaped high resistance wire, and the chemical fiber is welded or cut to perform the fiber processing. A method of processing a chemical fiber characterized by: