JPS5837905B2 - Exterior molding method for plastic products - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for shaping the exterior bodies of products such as plastic tube containers and lids, and its purpose is to easily form seamless, beautiful and robust exterior bodies. It can be manufactured efficiently and inexpensively.

The method of the present invention will be described in detail with reference to the embodiment shown in the drawings.A short cylindrical female mold 2 is bored in a die 1, and a male mold 3 is placed above it.

The male mold 3 has a round bar shape, and has a head 4 with a slightly larger diameter at its tip, and a plurality of grooves 5 equally spaced on the circumferential surface of the head 4. take shape

After fitting the exterior body material of a short disk-shaped aluminum metal block into the female mold 2 of this die 1, when the male mold 3 is impactfully pressed against the female mold 2, the female mold The exterior body A1 of the metal lump in the mold 2 is pressed by the male mold 3 and squeezed out from the gap α between the female mold 2 and the male mold 3, so it rises along the outer peripheral surface of the male mold 3 and forms a cylindrical exterior. The cylindrical exterior body A2 has a plurality of longitudinal ribs B projecting from the grooves 5 on the inner circumferential surface thereof.

After the male mold 3 rises again, the exterior body A2 fitted or shaped in the male mold 3 is extracted from the male mold 3, and then the cylindrical exterior body A2 is adjusted to the dimensions of the plastic lid C, for example. This is then cut and fitted to the lid C with strong pressure and fixed together to complete the exterior body A3.

Since the present invention is manufactured by such a method, a plurality of exterior bodies can be shaped 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 and smooth outer surface without scratches, and because the exterior body is made of metal such as aluminum, it is possible to It has excellent effects such as being able to create a beautiful outer surface unique to metallics by coloring.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of the device used in the method of the present invention, Fig. 2 is a bottom view of the male type, Fig. 3 is a partially cutaway side view of the squeezed exterior body, and Fig. 4 is a partially cutaway side view of the device used in the method of the present invention. A partially cutaway side view of an exterior body fitted and fixed to a plastic container is shown. 1...Dice, 2...Female mold, 3...
...Male type, 4...Head, 5...Groove, A, A11 A2...Exterior body, B...
···rib.

Claims (1)

[Claims] 1. After enlarging the outer body material of a short disc-shaped metal block into a short cylindrical female die formed by drilling a die, a round bar-shaped head with a slightly larger diameter is formed at the tip, and A male mold having a plurality of grooves formed on the head surface is pressed with impact against the female mold,
A cylindrical body is formed by squeezing the metal lump along the outer surface of the male mold, and a plurality of longitudinal ribs are protruded from the inner peripheral surface of the cylindrical body, and the metal cylindrical body is further squeezed out from the male mold. 1. A method for shaping an exterior body of a plastic product, which comprises the steps of: extracting the metal cylindrical body, then cutting the metal cylindrical body, and then fitting it onto the outer peripheral surface of a plastic body.