JPS5924889B2 - Exterior molding method for plastic products, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for molding exterior bodies of products such as plastic tube containers and lids, and its purpose is to easily form seamless, beautiful and robust exterior bodies. To provide a method for molding an exterior body that can be manufactured efficiently and inexpensively and that can be reliably and firmly fitted to a plastic body or the like.

First, the method of the present invention will be explained with reference to the first embodiment shown in FIGS. 1 to 4. A short cylindrical female die 2 is bored in a die 1, and a C male die 3 is placed above it. do.

The male mold 3 has a round rod shape, and its tip portion forms a head 4 with a slightly larger diameter. The grooves 5 are formed so as to be inclined in the same direction.

After fitting the outer body material of a short disc-shaped aluminum metal block into the female die 2 of this die 1, the male die 3 is inserted into the female die 2.
When the outer body material A1 of the metal lump in the female mold 2 is pressed against the male mold 3, the female mold 2 and the male mold 3 are
Since it is squeezed out through the gap α between the male die 3 and the outer circumferential surface of the male mold 3, it rises while being twisted to form a cylindrical exterior body A2, and the inner circumferential surface of the cylindrical exterior body A2 is The grooves 5 (thus, a plurality of spiral ribs B are formed protrudingly).

The male mold 3 is fitted onto the hind limb male mold 3 which has risen again, and the exterior body A2 is pulled out from the male mold 3 while rotating in the opposite direction, and then the cylindrical exterior body A2 is attached to a lid body C made of, for example, plastic. Cut it according to the dimensions and fit it into the lid C with strong pressure.

Next, the second embodiment shown in FIGS. 5 to 8 will be described. The grooves 5 are inclined in the same direction as the inclined grooves 5 formed on the male die 3 on the inner peripheral wall surface of the female die 2 of the first embodiment. A plurality of grooves 6 are formed at equal intervals, whereby the exterior body material A' fitted into the female die 2 is pressed with an impactful force by the male die 3 to form a cylindrical exterior body A2. A plurality of spiral ribs B formed by grooves 5 are formed on the inner peripheral surface thereof, and a plurality of spiral ribs D are formed protrudingly formed on the outer peripheral surface thereof by grooves 6 of the female die 2. do.

Thereafter, it is extracted and cut in the same manner as in the first embodiment, and then fitted to the lid C with strong pressure.

Although not shown in the drawings, the grooves 5 may not only be provided on the head of the male mold 3, but may also be provided on the circumferential surface of the male mold 3 by extending the grooves 5.

Since the present invention is manufactured by such a method, a plurality of exterior bodies can be molded at once by one drawing process.

In addition, since the exterior body is drawn, it is possible to obtain a thick exterior body, which makes it possible to obtain a sturdy outer surface.As the exterior body is made of metal such as aluminum, various coloring processes can be applied to create a beautiful metallic finish. It is possible to form a beautiful exterior surface.

Furthermore, since the plastic body and the exterior body are fitted together by the spiral ribs, they can be firmly attached without being pulled out unnecessarily.

Furthermore, by forming a spiral lip on the outer circumferential surface of the exterior body, it has various effects such as preventing the hand from slipping while handling plastic products, etc., and making it possible to obtain a product with excellent aesthetic sense. be.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a partially cutaway side view of the device used in the method of the present invention, and FIG. 2 is a bottom view of the male type, and FIG. Figure 3 is a partially cutaway side view of the squeezed exterior body, Figure 4 is a partially cutaway side view of the exterior body fitted and fixed to a container made of plastic, etc., and Figures 5 to 8.
The drawings show a second embodiment, and Fig. 5 is a partially cutaway side view of the device used in the method of the present invention, Fig. 6 is a plan view of the female mold, and Fig. 7 is a part of the squeezed exterior body. FIG. 8 is a partially cutaway side view of the exterior body fitted and fixed to a container made of plastic or the like. 1...Dice, 2...Female mold, 3...
...Male type, 4...Head, 5...Groove, A2...Exterior body, B...Rip, 6.
...Ring groove, D...Rib.

Claims (1)

[Scope of Claims] 1. After fitting an outer body material of a short disc-shaped metal lump into a short cylindrical female die formed by drilling a die, a round bar-shaped metal block having a slightly larger diameter at its tip is inserted. A male die, which has a head shaped like this and a plurality of grooves inclined in the same direction on the circumference of the head, is pressed against the female die with an impact, and the metal lump is moved along the outer circumferential surface of the male die. A cylindrical body is formed by squeezing the cylindrical body, a plurality of spiral ribs are formed protruding from the inner peripheral surface of the cylindrical body, and the cylindrical body is cut as appropriate to match the dimensions of the plastic product. A method for forming the exterior body of plastic products, etc. 2. A short disk-shaped metal lump is placed in a short cylindrical female die in which a plurality of inclined grooves are formed in the male die and a plurality of grooves inclined in the same direction are formed on the inner peripheral wall surface of the die. After inserting the exterior body material, a male mold having a round bar-shaped head with a slightly larger diameter formed at its tip, and a plurality of grooves inclined in the same direction formed on the circumferential surface of the head. is pressed against the female mold with an impact, and the metal lump is squeezed out along the outer peripheral surface of the male mold to form a cylindrical body, and a plurality of spiral ribs are protruded from the inner peripheral surface of the cylindrical body. 1. A method for molding an exterior body for a plastic product, etc., comprising: protruding a plurality of spiral ribs on the outer peripheral surface of a cylindrical body; and further cutting the cylindrical body as appropriate to match the dimensions of the plastic product.