JPS59174333A - Manufacture of synthetic resin belt - Google Patents

Abstract

PURPOSE:To fix a decorative member integrally with a belt main body, by mounting a decorative member into a synthetic resin belt main body by insert molding. CONSTITUTION:When the top and bottom forces 1, 2 are opened, a decorative member 6 is placed on the bottom of the cavity such that a pin 6c of the decorative member 6 is introduced in a hole 3 formed in either the cavity 1a or the cavity 2a formed in the top and bottom forces 1, 2 if the forces 1, 2 are closed. Then the top and bottom forces 1, 2 are closed, and the decorative member 6 is fixed by a holding pin 4. Then a melted synthetic resin material is injected via a gate led to the cavity to injection mold a belt 8. In this case, a spring bar hole 8a is formed by a spring bar hole pin arranged before the injection molding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a synthetic resin band.

Conventional synthetic resin bands include metal nameplates,
Some bands have a decorative part attached to the top of the band using an adhesive method, and others have a hole in the band body and a decorative part simply inserted into the band.

When such a band is bent or twisted during handling, the decorative member easily peels off, becomes stiff, and comes off, resulting in a disadvantage of ±5.

Furthermore, in conventional synthetic resin bands, since the above-mentioned decorative members are attached and removed after molding, processing such as gluing and pasting is required, and this difference in processing skills creates a sense of unity between the band body and the decorative members. was inevitably damaged.

The present invention aims to solve the above-mentioned drawbacks of the conventional band, and the gist of the present invention is to attach a metal nameplate or other decorative member to the synthetic resin band by insert molding, thereby ensuring that the decorative member is securely fixed. It is an object of the present invention to provide a method for manufacturing a synthetic resin band with a decorative member, which is inexpensive and does not lose the sense of unity between the band body and the decorative member.

An embodiment of the present invention will be described below with reference to the drawings.

Figures 1 to 4 show the first example of "non-explosion".
1 and 3 are cross-sectional views of the mold, FIG. 2 is a perspective view of the metal nameplate, and FIG. 4 is a marine perspective view of the completed band.

'7: In Figure J1, the upper mold 1 has a cavity 1a which is the lower surface side of the finished band in Figure 4, and a hole 3 that passes through and reaches the cavity 1.1. , spring 1b'
``C'AiJ R'd A push pin 4 that is pushed in the direction of the cavity 1a is attached.

The spring force of this spring 1b can be adjusted freely using an adjustment screw 1c.

Note that the spring may be replaced by pneumatic pressure, hydraulic pressure, or the like.

The lower mold 2 has a cavity 2a that forms the upper surface side of the completed band.

In addition, a groove 5 is carved in the joint part of the upper and lower molds 1.2, and a spring frame hole pin (not shown) for securing the spring frame hole of the completed band during molding is inserted into the groove. 5 and the central part ζ within the cavities 1a, 2a, it looks like a bridge is built between the grooves.

In addition to the above, one of the spring frame hole pins may pass through the groove 5, the other may protrude into the cavity or tee, and its end may abut against the wall of the mold.

In the following 1c and Fig. 2, the metal nameplate 6 is 1 on the completed band.
The decorative part 6a visible from the 1f+i side has letters, patterns, decorations, etc., and has a 1°-shaped foot 6b extending from the decorative part 6a to prevent the metal nameplate 6 from coming off the band body. The lower side of the decoration part 6a has a pin 6C that is introduced into the hole A.

Next, the process of forming and completing the band will be described.

When the upper and lower molds are clamped as shown in Figure 3, the pin 6
When the upper mold 1 and the lower mold 2 are open (the state shown in Fig. 1), a metal name plate 6 is attached to the bottom of the cavity 28 of the lower mold 2 so that the metal plate C is introduced into the hole A. After placing the upper and lower molds 1
．． 2 is mold-clamped, and the metal name plate 6 is fixed by the pressing pin 4 trap.

Thereafter, molten synthetic resin material is injected through a sprue led into the cavity and injection molding is performed.

At this time, the spring frame hole is formed after molding using the aforementioned spring frame hole pin provided before injection.

Next, open the upper and lower molds 1.2, take out the synthetic resin pad with the metal name plate 6 attached, cut out the remaining part of the pin 6C protruding from the bottom side, and make the necessary summary. Process and complete.

FIG. 4 shows the completed band 8, the metal nameplate 6 is attached to the band 8 with a sense of unity, and the l1-shaped legs 6bK
It will be easier to handle and there will be no chance of it falling out. 3a is a spring frame hole of the band.

In the first embodiment described above, the decorative member is placed on the lower mold and molded, but when it is placed, positional deviation occurs.
The second embodiment of the present invention is intended to more reliably prevent the possibility of this.

In the second embodiment of the present invention, in order to eliminate the above-mentioned concerns, as shown in the perspective view shown in FIG.
Insert the pin 6C of the metal nameplate 6.

Next, the upper and lower molds are clamped and the first loss shown in Fig. 3 is performed.
As in the example, the metal name plate 6 is securely fixed to the press pin 4 and the bottom of the other cavity, and a synthetic resin band is manufactured by performing molding.

Note that in the first and second embodiments of Item II, the metal nameplate has one pin in order to simplify the gist of the invention, but the third embodiment shown in FIG. It is also conceivable that the metal nameplate could be held in place with two or more pins, as in the case of using two pins 7a.

Furthermore, in addition to metal nameplates, various usage forms and materials such as decorative studs and heat-resistant synthetic resin plates can also be used.

As described above, according to the method for manufacturing a synthetic resin punt according to the present invention, the pin of the decorative member introduced into one of the through-holes of the mold before injection molding is inserted into the mold (the stamping pin attached to the mold). Since the decorative parts are inserted into the band, it is possible to securely fix the parts such as metal nameplates without losing the sense of unity with the band body, and after the molding, it can be attached to the band of the decorative parts. Since no installation work is required, it is possible to obtain a synthetic resin band with a decorative member at a low cost.

[Brief explanation of drawings]

All the drawings show embodiments of the present invention, and FIGS. 1 to 4 show the first embodiment, FIG. 1 is a partial sectional view of the upper and lower molds when the mold is opened, and FIG. Perspective view of metal nameplate, 3rd
The figures are a partial cross-sectional view of the upper and lower molds during mold clamping, showing a state in which the metal nameplate is fixed; FIG. 4 is a partial perspective view showing the band after completion; FIG. Fig. 6 shows a state in which the metal nameplate is fixed, 1 - a partial perspective view of one of the molds, and 6 shows a third embodiment of the present invention, which is a perspective view of a metal nameplate equipped with a plurality of pins.・・Upper mold, 1a・Bunt lower side cavity, 11)・・・Spring, 1C・・・Adjustment screw, 2・・
・Lower mold, 2a... Band upper cavity, 6 ・Hole, 4
・Press pin, 5... Groove for spring frame hole pin, 6.7
・Metal nameplate, 6a...decoration, 6 +) ・-foot,
6C57a...-P/, 8...Band, 8a ・
・Band spring frame hole. Patent applicant: Citizen Watch Co., Ltd. 2ゝN3 ゝ-5 Acceptable\, Distortion〉

Claims (1)

[Claims] In a method of manufacturing a band by injection molding a synthetic resin into a cavity consisting of a mold and a lower mold, the inside of a penetrating hole provided in either one of the upper and lower molds that reaches the cavity. Place a decorative member with a pin on the bottom of the other cavity of the mold, tighten the upper and lower molds by 111ν, and insert the pin of the decorative member into the hole. A method for producing a synthetic resin band, which is characterized by introducing the band into the material and fixing it using a pressing bottle.