JPH04126102A - Manufacture of band made of synthetic resin - Google Patents

Abstract

PURPOSE:To obtain the band made of a synthetic resin in which an ornamental member such as a metallic name plate, etc., is insert-formed in the band made of a synthetic resin, the ornamental member is fixed surely, an integral sense of the band main body and the ornamental member is not lost either, and also, an inexpensive member is provided by exposing the ornamental member from a notch part provided on the upper face or the lower face of the band made of a synthetic resin having the ornamental member in the inside. CONSTITUTION:The band made of a synthetic resin has a notch part on the upper face, and from its notch part, a metallic name plate 5 (ornamental member) is exposed. In this regard, the notch part can be provided on the lower face, and also, can be provided on both of the upper face and the lower face. The upper die 1 has a cavity 1a which becomes the lower face side of the finished band, and is provided with a holder pin 3 pushed in the direction protruded in the cavity 1a from the upper die 1 by a spring 1b. When the upper die 1 and the lower die 2 are opened, the part looked at from the upper face side of the finished band is brought into contact with a position pushed by the holder pin 3 of the bottom of a cavity 2a of the lower die 2 and the metallic name plate 5 is placed, and thereafter, the upper and the lower dies are closed, and the metallic name plate 5 is fixed by the holder pin 3.

Description

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

Among conventional synthetic resin bands, there are bands in which a decorative member such as a metal name plate is attached to the upper surface of the band using an adhesive method, or a band in which a hole is provided in the band body and the decorative member is simply inserted.

Such a band has the disadvantage that the decorative member easily peels off or comes off if it is bent or twisted during handling.

Furthermore, conventional synthetic resin bands require processing such as gluing or pasting in order to mount the decorative member after molding, and this difference in processing skills creates a sense of unity between the band body and the decorative member. was inevitably damaged.

The present invention solves the above-mentioned drawbacks of conventional bands, and the gist of the present invention is to layer a decorative member such as a metal nameplate into a synthetic resin band by insert molding, so that the decorative member can be securely fixed. , an inexpensive decorative member that maintains the sense of unity between the band body and the decorative member. The object of the present invention is to provide a method for manufacturing a synthetic resin band.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be explained with reference to the drawings.

1 to WX4 show the first embodiment of the present invention, and the first embodiment
3 and 3 are sectional views of the mold, FIG. 2 is a perspective view of the metal nameplate, and FIG. 4 is a perspective view of the completed band.

In FIG. 1, the upper mold 1 is located in a cavity 1a' which is the lower surface side of the completed band in FIG. Equipped with push pin 3.

This pusher pin 6 can be ejected into the upper mold 1 upwardly against the spring 1b.

The spring force of this spring 1b can be freely adjusted using the V4 adjustment screw ICE.

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

The lower mold 2 is the cavity 2 that will be the top side of the finished band.
It has m.

In addition, at the joint part of the upper and lower molds 1.2, a spring bar 4 is carved on both sides, and during molding, the spring rod hole pin is passed through the groove, and a bridge is formed between the grooves. The central part of the t
It protrudes into the cavity.

Next, the metal nameplate 5 shown in FIG. 2 has letters, patterns, decorations, etc. on the part visible from the top side of the completed band, and two cross-sectional letters extending downward from both ends of the part visible from the top side of the completed band. The metal nameplate 5 is prevented from coming off from the band body by having the legs 5a1 having the shape of the shape.

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

In the third cause, when upper mold 1 and lower mold 2 are open (first
After placing the metal name plate 5 with the part visible from the top side of the completed band in contact with the position where the pusher pin 6 presses at the bottom of the 2 m cavity of the lower mold 2, the upper and lower molds The mold is clamped, and the metal name plate 51 is attached using the pusher pin 3.
Fixed to.

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

After injection molding, the spring rod hole is formed by removing the aforementioned spring rod hole pin that was projected into the cavity before injection.

Next, the upper and lower molds 1.2 are opened to take out the synthetic resin band on which the metal name plate 5 is attached, and the necessary processing is performed to complete the band.

FIG. 4 shows the completed band. The metal nameplate 5 is attached to the band with a sense of unity, and the L-shaped legs 5a prevent it from coming off during handling.

In the second embodiment of the present invention, as shown in the cross-section shown in FIG. By placing the metal name plate 5 on the convex portion 6 in the same manner as in the first embodiment, a completed band shown in a perspective view in FIG. 6 can be obtained.

This 25th il! A metal name plate 5 is recessedly attached to the upper surface of the band according to this embodiment, and a band with a three-dimensional effect that is slightly different from that of the first embodiment is obtained. The second embodiment is the same as the first embodiment except that the metal nameplate 5 is placed on the convex portion 6, so the explanation other than the above will be omitted.

1st example in which the decorative member is placed on the lower mold and molded, 2nd example
The third embodiment of the present invention is more secure in preventing misalignment that occurs during placement than the other embodiments, and as shown in the perspective view of FIG. A rectangular pusher pin 7 that is pushed in the direction of protruding from the mold by a spring, pneumatic pressure, hydraulic pressure, etc. is landed on a mold having a tee, and the metal name plate 8 is attached to the pusher pin as shown in the perspective view of FIG. 7. Crimp.

The metal nameplate 8 has two legs extending downward from both ends of the part visible from the top side of the completed band, and has a U-shaped cross section and no T.
This foot has a 68a to prevent the metal nameplate 8 from coming off from the band body due to the synthetic resin entering during injection molding.

After the metal name plate 8 is crimped onto the pusher pin 7, the upper and lower molds are clamped, and the first stage shown in FIG. 3 is completed! As in the example, secure the metal nameplate 8 with the pusher pin 7 and the bottom of the cavity of the other mold! j! A synthetic resin band is manufactured by fixing it to a plastic band and performing injection molding.

As shown in the sectional view of FIG. 9, the band according to the third embodiment of the present invention is equipped with a metal name plate 8, and a synthetic resin enters the leg 8a to prevent the metal name plate 8 from coming off from the band body. I'm here.

In the third embodiment, one pusher pin is used, but the metal nameplate may be held by two or more pusher pins, as shown in FIG. 1O.

Furthermore, in addition to the metal nameplate, it is also possible to use various forms and materials such as decorative studs and heat-resistant synthetic resin plates.

As described above, according to the method of manufacturing a synthetic resin band according to the present invention, the decorative member such as a metal nameplate is attached to the band by pressing the decorative member with a press pin before injection molding and inserting the feet of the decorative member by injection molding. To provide a synthetic resin band with an inexpensive decorative member, which can be securely fixed without losing the sense of unity with the main body, and does not require the work of attaching the decorative member to the band after molding.

[Brief explanation of the drawing]

The drawings collectively show an embodiment of the present invention, and Figs. 1 to 4 show the first embodiment, Fig. 1 is a sectional view of the upper and lower molds when the mold is opened, and Fig. 2 is a metal dies. A perspective view of the nameplate, Fig. 3 is a sectional view of the upper and lower molds when the metal nameplate is fixed and the mold is clamped, Fig. 4 is a perspective view showing the band after completion, and Fig. 5 is a view of the second embodiment when the mold is clamped. A cross-sectional view of the upper and lower molds showing a state in which the metal nameplate is fixed, FIG. 6 is a perspective view showing a band completed by the second embodiment, and FIG. 7 is a perspective view showing one of the molds according to the third embodiment. , Fig. 8 is a perspective view showing the metal nameplate crimped to the press pin in the third embodiment, Fig. 9 is a sectional view of the band completed in the third embodiment, and Fig. 10 is the fourth embodiment. FIG. 2 is a perspective view of a mold equipped with a plurality of press pins. 1... Upper mold, 1a... Lower band cavity 1b...
...Spring, 1C...Adjustment screw, 2...
...Lower mold, 2a...Band upper side cavity 6.7...
... Push pin, 4 ... Groove for spring sacred wood bottle, 5. 8...Metal name plate, a...Legs, 6...Protrusions, ...holes.

Claims (2)

[Claims] (1) In a method of manufacturing a band by injection molding a synthetic resin into a cavity consisting of an upper mold and a lower mold,
A pusher pin is landed on either one of the upper and lower molds so as to protrude into the cavity, a decorative member is placed on the bottom of the other cavity of the mold, and the upper and lower molds are pressed into the mold. A method for manufacturing a synthetic resin band, characterized in that when tightened, the decorative member is fixed with a push pin. (2) In a method of manufacturing a band body by injection molding a synthetic resin into a cavity composed of an upper mold and a lower mold, a pusher pin is placed in either one of the upper and lower molds, and When the decorative member is crimped onto the pressing pin and the upper and lower molds are clamped, the decorative member is fixed between the pressing pin and the bottom of the other cavity. Method for manufacturing a synthetic resin band.