JPS6059850B2 - Synthetic resin coating method for approximately U-shaped material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a synthetic resin coating method for a substantially U-shaped shaped material, and more specifically, the present invention relates to a method for coating a substantially U-shaped shaped material with synthetic resin, and more specifically, a method for coating synthetic resin on the outside of the shaped material 1 and an extrusion port 3 for supplying synthetic resin to the outside of the shaped material 1, and on the inside of the shaped material 1. The mold material 1 is inserted into a mold 2 provided with an extrusion port 4 to be supplied, and each extrusion port 3, 4 is inserted.
The present invention relates to a synthetic resin coating method for a substantially U-shaped molded material, which is characterized in that the synthetic resin is supplied to the outside of the molded material 1 and the inside of the molded material 1 to cover the molded material 1, respectively.

Conventionally, shaped materials having a substantially U-shaped cross section have been coated with paint or extruded using a mold having one extrusion port.

However, in the former case, it was difficult to coat the synthetic resin to the desired thickness. In the latter case, there were no particular problems when coating flat plates or pipes with synthetic resin, but when trying to coat molded materials, the synthetic resin did not adhere well. In the latter case, it was also impossible to cover the inside and outside of the profile with different materials. The present invention has been made in view of these conventional drawbacks, and its first object is to coat a generally U-shaped material with a synthetic resin so that it can be easily coated with a synthetic resin to a desired wall thickness. A second object of the present invention is to provide a method for coating a substantially U-shaped molded material with a synthetic resin, which can coat the inside and outside of the molded material with different synthetic resin materials at the same time.

Hereinafter, the present invention will be explained in detail based on the accompanying drawings. In the illustrated example, 2 is a mold, and in the mold 2 there is an extrusion port 3 for supplying synthetic resin to the outside of the mold material 1 having a substantially U-shaped cross section.
and an extrusion port 4 for supplying synthetic resin to the inside of the mold material 1 are opened in a direction substantially perpendicular to the moving direction of the mold material 1. The above-mentioned extrusion port 3 opens approximately at the center on the outside, and the extrusion port 4 opens at the tip of the protrusion 2a projecting from the mold 2 at approximately the center on the inside. These extrusion ports 3 and 4 are usually connected to separate extruders, but they can also be connected to a single extruder. The interior of the mold 2 is constricted at the entrance and exit of the mold material 1. The mold 1 is then inserted into the mold 2, and synthetic resin is supplied to the outside and inside of the mold 1 through the extrusion ports 3 and 4, respectively, so that the entire surface of the mold 1 is coated with the synthetic resin. At this time, the synthetic resins supplied from both extrusion ports 3 and 4 merge near the opening 5 of the mold material 1. As the shape material 1, for example, a metal material extending in the longitudinal direction as shown in FIG. 4 is used. In the present invention, as described above, the synthetic resin extrusion ports are opened on the outside and inside of the mold material, and the synthetic resin is supplied from each extrusion port to cover the mold material, so that the synthetic resin is supplied from two locations. As a result, the synthetic resin can be coated well, and the synthetic resin supplied from the extrusion port can be coated while keeping the balance, and the synthetic resin can be easily coated to the desired thickness. be able to.

In addition, by supplying synthetic resin from two extrusion ports for coating, each extrusion port can be connected to a separate extruder, etc., and the inside and outside sides can be coated with different synthetic resin materials that suit the purpose. There is an advantage that it can be done.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of one embodiment of the mold used in the present invention, Fig. 2 is a sectional view taken along the line A-A of the same, Fig. 3 is an explanatory diagram of the operation, and Fig. 4 is a perspective view of the mold material. .

Claims (1)

[Claims] 1. Insert the mold material into a mold that has an extrusion port for supplying synthetic resin to the outside of the mold material and an extrusion port for supplying synthetic resin to the inside of the mold material, and insert the mold material into the outside of the mold material and the inside of the mold material through each extrusion port. A method for coating a substantially U-shaped molded material with a synthetic resin, the method comprising supplying a synthetic resin to coat the molded material.