JP3000828U - Thermoplastic welding machine - Google Patents

Abstract

(57) [Summary] [Objective] An apparatus for processing a chemical fiber into a desired shape by forming a hot-press surface having releasability and welding or fusing the chemical fiber using an impulse power source. [Structure] A plate-like substrate 1 having heat resistance is provided with a groove 7 punched in a shape to be processed, a high resistance wire 5 embedded in the groove, and a heat-resistant polyimide film 2 and a glass fiber 3 thereon. An apparatus for forming a hot-pressed surface by stacking the metal foil 4 on top of it and heating it with an impulse power source to weld or cut the chemical fiber into a desired shape.

Description

[Detailed description of the device]

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

[Prior Art] There are various types of thermoplastic resin products such as chemical fibers, non-woven fabrics, synthetic leathers, synthetic leathers, and film sheets. The methods for laminating and sealing these are hot press type and ultrasonic wave. Type, laser type and impulse heater type, various types of laminate sealing machines 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 materials and soft materials are difficult to weld because they absorb vibration waves.In the laser method, the strength is insufficient due to spot welding of the resin, and in the case of fibers, there is no effective effect in preventing fraying. There was a problem.

In the impulse heater type using the stand type laminate seal machine shown in FIG. 4, the temperature condition, the welding surface, and the welding cross section are relatively satisfactory, but when the impulse heater wire is heated and welded, if the temperature rises, the heater wire is heated. However, there is a problem in that the linear expansion coefficient causes its length to elongate, and therefore it is necessary to apply tension to both of the heater wires to maintain linearity, and only linear heater wires can be used. However, 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 workpieces, but there are few calls for processing complex shapes such as glove-like shapes, and the impulse heater method that can handle all shapes is demanded. Development of a processing 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 occurs that deforms into a wavy shape.Therefore, in the impulse heater method, the heater wire must be tensioned from both sides and maintained in a straight line shape. This was the reason why only rectangular articles could be processed. In the impulse heater type laminating seal machine devised this time, by forming the heater wire into a coil shape, the expansion in the longitudinal direction due to the linear expansion coefficient is absorbed within the coil diameter and embedded in the groove to fix the coil shape. By suppressing the overhang phenomenon, it has become possible to manufacture articles that are compatible with all shapes.

[Means for Solving the Problem] In order to process a chemical fiber or the like into a desired shape, the present invention embeds a groove formed in a shape desired to be processed in a plate-shaped substrate having heat resistance and embedded in the groove. A coiled high resistance wire, heat resistant polyimide film and glass fiber are laid on this high resistance wire, and a metal foil is further laid on it to form a hot-pressed surface, which is heated by an impulse power source and requested. This object was achieved by fusing or cutting chemical fibers in the shape.

[Example] An example 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 7 having heat resistance is provided with a groove 7 for embedding a heater coil therein. A coil-shaped 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 the heat generated by the high resistance wire 5, and has a strength sufficient to withstand the pressing pressure when processing the thermoplastic resin. For example, a resin plate containing glass fiber, 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 part is formed by winding the high resistance wire 5 in a round coil shape and its diameter is about 1.5 to 2 m / m. 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. Especially 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-shaped trace at the welding site, This can be achieved by selecting the coil pitches according to requirements and using the high resistance wire 5 having a rectangular cross section.

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 linear expansion coefficient is absorbed in the radial direction of the coil, so that the overhang phenomenon does not occur, and the measurement result is as follows. The elongation rate of the coil in the longitudinal direction is about 0.015%, and this degree of elongation 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 substrate 1, is connected to an impulse power source 10 and is heated. In the case of heating at a low temperature (150 to 180 ° C) or lower, 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. When hot-pressing is performed using the plate-shaped substrate 1, the nylon 66 cloth 13 is seized on the mold surface or a phenomenon of stringing occurs.

In order to avoid this baking 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 glass fiber 3 having heat resistance is placed thereon. The hot-pressed surface was formed by stacking and further stacking a metal foil 5 having a thickness of several microns thereon. By forming such a hot-pressed surface, the nylon 66 cloth 13 and the heat-resistant polyimido film 2 are in the same family, but are separated by the glass fiber 4 and the metal foil 5, so the hot-pressed surface is made of a different substance. Therefore, the hot-pressed surface has heat resistance and releasability.

A case where a chemical fiber such as nylon 66 cloth 13 is processed by using the plate-shaped substrate 1 having the hot press surface described above will be described. Place one or more nylon 66 cloths 13 to be processed on the plate-like substrate 1 having a hot-pressed surface in which the coiled high resistance wire 5 formed in the shape to be processed on the nylon 66 cloth 13 is embedded, and compare on it. A pressure surface 9 having a pressing surface having a desired elasticity is placed, and an impulse power source 10 is turned on. The pressure applied to the pressing surface may be such a pressure that the Nain 66 cloth 13 and the hot press surface are in close contact with each other.

When the impulse power supply 10 is turned on by appropriately adjusting the power supply 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 high current is used, the existing high voltage DC method of capacitor storage is an effective heating method. Generally, the processing time is as short as 10 to 20 seconds, and after the current is cut off, it immediately drops to the normal temperature zone. Therefore, since it is cooled within a few seconds while it is still pressed, the occurrence of stringing or shrinkage can be prevented. Also, the productivity is good and there is no fiber fraying because it is entirely processed. If you want to finish the work early, forced cooling is effective.

As described above as the embodiments, by using the plate-like substrate having the hot-pressed surface of FIGS. 1 to 3 and the impulse power source, the chemical fiber has good productivity in a short time and has no fiber fraying. It is possible to provide the processing machine of. Although circular processing is shown as an example, the processing shape is not limited to a circular shape, and even a complicated shape such as a glove can be easily processed if the hot press surface is formed into the required shape. Is. The chemical fiber to be processed has been explained using non-coated nylon 66 cloth, but it has been confirmed that it can be processed to silicone rubber coat or butyl rubber coated nylon 66 cloth. Welding or fusing of chemical fiber or artificial leather etc. However, 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 press surface according to the present invention has the following advantages. The prevention of fraying of the chemical fiber and the pretreatment process such as coating and hoverlock can be omitted, so that the productivity is improved and the finished product is improved. Further, the chemical fiber can be easily processed into any shape, for example, a complicated shape such as a glove, and the processing with high productivity can be performed in a short time. Since the power supply used is not a special power supply and does not use high frequencies, there is no radio interference or noise interference, and no acoustic interference 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 a thermoplastic resin welding machine according to an 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 (2)

[Scope of utility model registration request] 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.