JPH04201320A - Processing method for welder of thermoplastic synthetic resin sheet - Google Patents

Abstract

PURPOSE:To prevent generation of an inferior product by remaining spark marks in a printed layer by preventing a spark to a metallic printed layer, by a method wherein a matter provided with an insulation member on a part confronted with at least a metallic printed layer in a nonpressing recessed part is used as a mold electrode. CONSTITUTION:A mold electrode 20 is constituted of a top force electrode 21 having a pressing protrusion 213 and nonpressing recessed part 212 and a flat bottom force electrode 22. The whole sphere (part confronted with a metallic printed layer) 212a of the nonpressing recessed part 212 of the top force electrode 21 is provided with an in insulation sheet 40 preventing a spark to a metallic printed layer 10. A material having synthetic resin such as epoxy resin or silicone resin and the other material having insulation properties can be used as the material for the insulation sheet 40. Then it is good if the material is provided within a range confronted with the metallic printed layer 10 of at least the pressing recessed part 212 even if the material is not provided in the whole sphere 212a of the nonpressing recessed part 212. Then a sheet S put on the bottom force electrode 22 is pressed by the top force electrode 21 and welder processing to the surface S1 by sealing is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for welding a thermoplastic synthetic resin sheet having a metal print layer formed of a metal vapor-deposited foil and/or a metal powder-containing ink laminated on its surface.

[Prior Art] Conventionally, as a welding method for a thermoplastic synthetic resin sheet, for example, as shown in FIG. There is a method in which a synthetic resin sheet 03 is welded using a mold electrode 07 consisting of an upper mold 05 and a lower mold 06 having a design surface 04.

It should be noted that the electrode surface of the mold electrode 07 used in this conventional method is also exposed in the non-pressing recess 08 of the design surface 04 of the upper mold 05.

In the figure, reference numeral 09 indicates a power source for welder processing.

[Problem to be solved by the invention]

By the way, in the mold electrode 07 used in the conventional method as described above, since the electrode surface is also exposed in the non-pressing recess 08 of the design surface 04 of the upper mold 05, the metal printed layer 02 is exposed in the non-pressing recess 08. When applying welder processing to 08,
During processing, sparks are generated from the non-pressing recesses 08 to the metal print layer 02, leaving spark marks on the metal print layer 02.
This was one of the causes of defective products.

The present invention was made against the background of such conventional technology, and can be processed in the conventional processing time without reducing productivity, and can prevent sparks to the printed metal layer. An object of the present invention is to provide a welding method for thermoplastic synthetic resin sheets that can prevent the occurrence of defective products due to spark marks remaining on the sheets.

[Means to solve the problem]

The present invention provides a thermoplastic synthetic resin sheet on which a metal print layer made of metal-deposited foil and/or metal powder-containing ink is laminated, and at least a part of the metal print layer faces the non-pressed recesses on the design surface. A method for welding a thermoplastic synthetic resin sheet in which welding is performed using a mold electrode, characterized in that an insulating member is used as the mold electrode at least in the portion facing the metal print layer of the non-pressing recess. The present invention provides a method for welding a thermoplastic synthetic resin sheet.

[Effect]

The welding method for thermoplastic synthetic resin sheets of the present invention includes first arranging at least a portion of the metal print layer in a position facing the non-pressed recesses on the design surface, and then arranging the thermoplastic synthetic resin sheet between the mold electrodes. Then, the thermoplastic synthetic resin sheet is pressed with a mold electrode and welded.

At this time, since an insulating member is provided at least in the part of the non-pressing recess of the mold electrode that faces the metal print layer, sparks from the non-pressing recess to the metal print layer that occur during processing can be prevented, and therefore sparks in the print layer can be prevented. It is possible to prevent the occurrence of defective products due to traces remaining.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In describing this embodiment, a method for welding a welding material for sports shoes will be taken as an example.

In the welding method for a thermoplastic synthetic resin sheet according to an embodiment of the present invention, as shown in FIG. Upper mold electrode 2, which is a 2° structure
The sheet S is placed in a non-pressing recess 211 protruding from the design surface 21a of the sheet S, and the sheet S is placed between the upper mold electrode 21 and the lower mold electrode 22.

As the material for this sheet S, for example, synthetic leather or vinyl leather can be used, and these synthetic leathers and vinyl leathers may be made of a soft material on a base material layer made of a fabric such as a woven fabric, a non-woven fabric, or a knitted fabric (not shown). A general type of material in which an intermediate layer made of a flexible foamed synthetic resin such as a foamed vinyl chloride resin or a polyurethane resin, and a surface layer made of a soft vinyl chloride resin, a polyurethane resin, or an acrylic resin are laminated in sequence as necessary. Synthetic leather or vinyl leather can be used, but it is not necessarily limited to this, and other thermoplastic synthetic resin sheets can also be used.

Specific examples of this synthetic leather or vinyl leather include:
Talalino (manufactured by Kuraray ■), a urethane-based synthetic leather,
Cordley (made by Teijin Cordley ■), Capron (Achilles ■)
(manufactured by PVC) and general foamed vinyl chloride leather.

Further, the thickness of this sheet S is 0.5 to 5.0 mm, preferably 1.0 to 3.0 mm, and 0.5 mm to 5.0 mm, preferably 1.0 to 3.0 mm. If the number is less than 5, it will not be possible to express the embossed texture with a voluminous welder process. If it exceeds 0 mm, voluminous embossing is possible, but there is a drawback that the embossed material becomes heavy.

The metal print layer 10 is a layer made of metal-deposited foil and/or metal powder-containing ink laminated on the surface S1 of the sheet S, and in this embodiment, it is a layer made of aluminum-deposited foil and/or zinc-deposited foil thermally transferred by a hot stamping foil (not shown). Although foil or metal-deposited foil such as chromium-deposited foil is used, it is not necessarily limited to this. For example, in addition to such thermal transfer, metal powder combinations (not shown) such as aluminum, brass, zinc, copper, etc. are used. Ink can be printed using screen printing method, rotary screen method, spray method,
It is also possible to apply a method such as brush application.

As described above, the mold electrode 20 is an upper mold electrode having a pressing convex portion 213 provided around the peripheral edge of the design surface 21a and a non-pressing concave portion 212 disposed inside the pressing convex portion 213. 21 and a flat lower mold electrode 22, and a power source 30 is connected to the picture electrodes 21 and 22.

As the material for these upper and lower mold electrodes 21 and 22, conductive metals such as brass, copper, zinc, magnesium, aluminum, and iron can be used.

An insulating sheet 40 for preventing sparks to the metal print layer 10 is provided over the entire area 212a of the non-pressing concave portion 212 of the upper mold electrode 21 (metal print layer facing portion).

The material of this insulating sheet 40 can be an insulating synthetic resin such as epoxy resin or silicone resin, or other insulating materials, and it is not necessarily limited to a sheet-like material. Even if it is not provided in the entire area 212a of the non-pressing recess 212 of the upper mold electrode 21, at least the metal printed layer 1 of the non-pressing recess 212 is
It is sufficient if it is provided in a range that faces 0.

Note that the thickness of the insulating sheet 40 is usually 1.0 to 3. O
It is about m+.

Thereafter, the sheet S placed on the lower mold electrode 22 is pressed by the upper mold electrode 21 to perform welding processing by sealing the surface S1.

At this time, the entire area 2 of the non-pressing recess 212 of the upper mold electrode 21
12a is provided with an insulating sheet 40, it is possible to prevent sparks from the non-pressing recesses 212 to the metal print layer 10 that occur during processing, thereby preventing the generation of defective products due to spark marks remaining on the metal print layer 10. can do.

Although the present invention has been described in detail above, the present invention is not limited to this embodiment, and even if the structure and operation are changed without changing the gist, the invention is included in the present invention.

For example, in the embodiment, a welding method for a shoe cover material for sports shoes was taken as an example, but for example, a shoe cover material for other shoes such as children's shoes and men's shoes, as well as hats, gloves, socks, clothes, etc.
It can be applied to any welding method for thermoplastic synthetic resin sheets such as bags.

Further, the welding device used in the welding method for thermoplastic synthetic resin sheets may be any device as long as it has a mold electrode.

Furthermore, in the examples, the metal print layer transferred to the surface of the thermoplastic synthetic resin sheet is completely opposed to the non-pressed recesses on the designed surface of the upper mold electrode, but it is not necessarily limited to this. , it is sufficient that at least a part of this metal print layer faces the non-pressing recess.

Furthermore, in the examples, the insulating member was provided only on the upper mold electrode, but it is not necessarily limited to this. For example, when the lower mold electrode is provided with a pressing convex part and a non-pressing concave part, It may be provided in the same way in the non-pressing recess of this lower mold electrode.

Furthermore, suitable welding conditions can be selected depending on the material of the thermoplastic synthetic resin sheet and the design to be formed.

In addition, in the conventional welding method using a mold electrode with no insulating material interposed in the non-pressing recess, sparks inevitably occur from the electrode surface of the non-pressing recess to the metal printed layer, resulting in the thermoplastic composite being manufactured. Since spark marks remain on the surface of the metal print layer of the resin sheet, all sheets without spark marks on the surface of the metal print layer are considered to have been manufactured by the method of the present invention.

〔Effect of the invention〕

In the present invention, since the insulating member is provided at least in the portion of the non-pressing recess of the mold electrode facing the metal print layer, sparks from the non-pressing recess to the metal print layer that occur during processing can be prevented, and therefore, the printing This has the effect of preventing the generation of defective products due to spark marks remaining in the layer.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a welding method for a thermoplastic synthetic resin sheet according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional welding method for a thermoplastic synthetic resin sheet. S; sheet (thermoplastic synthetic resin sheet) Sl; surface Z; insulating sheet (insulating member) lO; metal print layer 20; mold electrode 21; upper mold electrode (mold electrode) 21a; design surface 212; non-pressing Concave portion 212a; entire area (metal print layer facing portion) 22; lower mold electrode (mold electrode) Patent applicant: Achilles Co., Ltd. Agent Patent attorney Shige Takashi Shirai Figure 1 Figure 2

Claims (1)

[Claims] (1) A thermoplastic synthetic resin sheet with a metal print layer made of metal vapor-deposited foil and/or metal powder-containing ink laminated on the surface, and at least a part of this metal print layer facing the non-pressing recesses of the design surface, A method for welding a thermoplastic synthetic resin sheet by welding using a mold electrode, characterized in that the mold electrode is an insulating member provided at least in a portion of the non-pressing recess facing the metal printed layer. Welding method for plastic synthetic resin sheets.