JPH06312434A - Manufacture of synthetic resin wrist band with printed design and the band - Google Patents

Abstract

PURPOSE:To provide a watch band with a clear printed design by manufacturing a synthetic resin watch band with the design such as characters, a pattern, etc., in high yield. CONSTITUTION:Two synthetic resin film sheets 1, 2 disposed with transparent synthetic resin film sheet at a front side, a front side member 5 made of a superposed sheet to be adhered by providing a print surface 3 printed with a picture design on either one surface of bonded surfaces of the sheets 1, 2, and a rear side member 8 integrally adhered by injection molding to a rear surface of the member 5 are provided, and a synthetic resin watch band with a printed design in which the surface 3 can be seen through from the front surface side can be manufactured in high yield.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a synthetic resin watch band with a print pattern such as letters and patterns and the watch band.

[0002]

2. Description of the Related Art As a watch band of this type, Japanese Patent Laid-Open No. 62-62
There is a proposal of -60510 gazette. The proposal is a decorative transparent band surface layer made of a transparent synthetic resin sheet which is not yellowed or difficult to yellow and which has been previously decorated with appropriate band patterns, characters, etc., and a back surface side of this band surface layer. A synthetic resin watch band consisting of a soft synthetic resin band main body integrally joined by injection molding so that the decorative part is embedded in the molding resin, and an appropriate band pattern on the back surface Orient the decorative transparent band surface layer made of a transparent synthetic resin sheet that has no yellowing or yellowing that has been decorated with characters in advance so that the backside decorative part is exposed in the cavity. The back surface side of the band surface layer is set by inserting into the mold of the injection molding machine and then injecting a molten synthetic resin compatible with the sheet resin into the cavity of the mold closing mold to perform insert molding. Soft synthetic resin A method of manufacturing a synthetic resin wristwatch band, characterized in that a synthetic resin wristwatch band is obtained in which the main body of the band is integrally joined, and the decorative portion of the band surface layer is embedded in the molding resin of the main band. Is described.

[0003]

However, according to this method, when the molten synthetic resin mainly consisting of the band is injected into the mold, the molten synthetic resin directly contacts the decoration provided on the back surface of the surface layer. Therefore, there is a problem that the decoration of the completed watch band becomes unclear due to the ink of the decoration melting and bleeding under the influence of the heat of the band of the molten synthetic resin.

[0004]

According to the present invention, at least one of two transparent synthetic resin film sheets, at least one of which is transparent, is appropriately printed, and the printed surface is placed inside. A resin film sheet is adhered to form a polymerized sheet, and the front side member is molded into a band shape, and the front side member is put in a split mold and a molten synthetic resin material is injected to join them together. By a method of manufacturing a watch band through a molding process of a back side member, a synthetic resin film sheet having two transparent synthetic resin film sheets arranged on the front side, and a pattern on one of the joint surfaces of the synthetic resin sheet. A front side member made of a polymerized sheet which is provided with a printed print side and is formed by adhesion, and a back side member integrally formed by injection molding on the back side of the front side member are provided, and the print side is provided from the front side. By obtaining prints with plastic watch band that can be transparent, it is intended to solve such problems.

[0005]

According to the present invention, the same type or at least one transparent sheet is used.
After printing appropriate characters, patterns, etc. on one surface of one of the two synthetic resin film sheets and the two film sheets, the two printing sheets are placed with the printing surface inside. A polymer sheet is formed by bonding with a heat-resistant and transparent adhesive, and the polymer sheet is cut into a band shape to form a front side member, and the front side member is used as a half mold for molding. The transparent side is stored so as to contact the inner surface of the molding part of the split mold, and after the split mold is closed, the molten synthetic resin is injected to the back surface of the front side member to form the back side member that is integrally joined to the front side member. Thus, a synthetic resin timepiece band with a print pattern is obtained which allows the printed surface to be seen through. Since one film sheet is interposed between the printing surface and the molten synthetic resin to be injected, the heat of the molten synthetic resin is buffered by this film sheet and the amount of heat transferred to the printing surface is extremely small. Therefore, the printing ink on the printing surface does not melt and bleed, and discoloration does not occur, and the bonding with the back side member can be performed while maintaining the initial clear state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings.

A transparent urethane film sheet 1 of a non-yellowing or hardly yellowing type formed by compounding a resin such as a diisocyanate type, a polyester diol type, a polyether diol type, and a transparent, semi-transparent or colored urethane film sheet of the same type. Two synthetic resin film sheets of No. 2 are prepared, and any one of the film sheets, in the embodiment shown in FIG. 1, one surface of the transparent urethane film sheet 1 is continuously or spaced with appropriate characters or patterns. Is provided by offset printing, screen printing, gravure printing, etc., and the two film sheets 1 and 2 are adhered with a transparent and heat-resistant adhesive with the printing surface 3 inside. Then, the polymerized sheet 4 is formed.
In addition to the above, the synthetic resin film sheet may be made of polyester, PVC, nylon, or a fluorine-based material, and the adhesive may be a nylon resin or urethane resin hot-melt type or urethane resin type adhesive. A two-liquid reaction type is suitable.

Next, the polymerized sheet 4 is put into a die-cutting machine (not shown) and cut into a watch band shape conforming to the printing surface 3 to obtain a front side member 5, and the front side member 5 is a split mold 6a for injection molding. Insert the transparent urethane film 1 side into the concave mold part 7a of the half mold 6a of 6b so that the two half molds 6a,
After the mold 6b is closed, a soft molten synthetic resin compatible with the front side member 5 is injection molded to form a back side member 8 integrally joined to the front side member 5, and after cooling, the back side member 8 is taken out from the split mold to remove the front side. It is possible to obtain the synthetic resin watch band 9 with a print pattern that allows the printed surface 3 to be seen through.

The molten synthetic resin injected has high heat (160 ■ 180
However, since the synthetic resin film sheet 2 intervenes between the printing surface 3 and the printing surface 3, the heat that is conducted does not affect the printing ink and the printing ink melts. The phenomenon of bleeding or discoloration does not occur, so that a clear print pattern as it is in the initial printing can be retained.

Although the watch band of the embodiment shown in FIG. 5 is a band on the sword side, the manufacturing method of the band on the lock side is the same. Further, when the synthetic resin film sheet 2 is used as a colored sheet, it is possible to reduce the printing cost by one color by using this as the background color of the print pattern.

[0011]

As described above, according to the present invention, since the front side member is formed by the two superposed sheets having the print surface on which the print pattern is printed on the joint surface side, the back side member to be injection molded is printed. Since it does not come into direct contact with the surface, it is possible to eliminate the influence that the heat of the molten synthetic resin has on the printed surface, and it is possible to produce a synthetic resin band with a clear print pattern with good yield. .

[Brief description of drawings]

FIG. 1 is a side view showing a forming process of a polymerized sheet.

FIG. 2 is an enlarged partial sectional view of a polymerized sheet.

FIG. 3 is a plan view of a front side member cut into a band shape.

FIG. 4 is a partial enlarged cross-sectional view showing a molding process of the back side member.

FIG. 5 is a perspective view of a watch band according to an embodiment of the present invention.

[Explanation of symbols]

 1 is a transparent synthetic resin film sheet 2 is a synthetic resin film sheet 3 is a printing surface 4 is a superposed sheet 5 is a front side member 6a, 6b is a split mold for injection molding 7a, 7b is a split concave molding part 8 is a back side member 9 is a watch band 10 is a pin hole in the mounting cylinder 11 is a punched stop hole 12 is a pin hole forming insert

Front page continuation (72) Inventor Nobuo Takayama 2-6-6 Taito, Taito-ku, Tokyo Within Cleo Co., Ltd.

Claims (2)

[Claims] 1. At least one of two transparent synthetic resin film sheets is appropriately printed, and then the two synthetic resin film sheets are adhered with the printed surface inside. A forming step of forming a polymerized sheet and cutting the polymerized sheet into a band shape; and a step of forming a back side member in which the front side member is put into a split mold and a molten synthetic resin material is injected to be integrally joined. Then, a method for producing a synthetic resin timepiece band with a print pattern, characterized in that a timepiece band through which the printed surface can be seen through from the front side is produced. 2. A synthetic resin film sheet having a transparent synthetic resin film sheet disposed on the front side, and a printed surface on which a pattern is printed is provided on any one of the joint surfaces of the synthetic resin film sheet for adhesion formation. A synthetic resin timepiece band with a print pattern, comprising: a front side member made of a polymer sheet; and a back side member integrally formed on the back surface of the front side member by injection molding.