Paper pulp container film covering method, equipment and production line

Abstract

The invention discloses a paper pulp container film covering method, paper pulp container film covering equipment and a paper pulp container production line. The paper pulp container film covering method comprises the following steps that S1, conveying is conducted, specifically, a hot paper pulp container subjected to hot pressing is directly conveyed to a bearing lower mold; the cold film is pulled to the position above the opening of the hot paper pulp container on the bearing lower die, the cold film pulled to the opening of the hot paper pulp container is tensioned, and a gap is reserved between the cold film and the opening of the hot paper pulp container; and S2, film covering is conducted, specifically, an upper dies and the bearing lower die are aligned and matched with each other, so that the cold film enters and fits the inner wall and the inner bottom face of the hot paper pulp container, heat exchange is conducted between the cold film and the hot paper pulp container, the cold film obtained after heating and hot melting is fixed to the inner wall and the inner bottom face of the hot paper pulp container, and then the film-covered paper pulp container is manufactured. The paper pulp container film covering method, equipment and production line have the advantages of being low in energy consumption, high in production efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of pulp molding and coating machinery, and in particular relates to a pulp container coating method, equipment and production line. Background technique [0002] Because the packaging of pulp molded products has many advantages such as environmental protection, degradability, and recycling, it is widely used in the packaging of various foods such as vegetables, fruits, and eggs. However, pulp molded products are often easily affected by moisture. When pulp molded products are affected by moisture, they are prone to decrease in strength and even direct cracking. In order to improve the strength of the product, many pulp molded products are currently covered with a film on the surface of the part that is easily affected by moisture. [0003] In the prior art, the process of covering molded pulp products often needs to heat the film itself first to melt the adhesive in the film, and then attach it to the cold ...

AI Technical Summary

Problems solved by technology

Therefore, the heating control process of the film is complicated, and it is easy to cause the film to be not heated in place or overheated to cause the film to rupture in the film, which is not conducive to the simplification of the process.

[0004] In addition, in the above process, the general pulp molded products are made by hot pressing, and the finished products after hot pressing often have a certain temperature, which will further affect the temperature of the film, which may cause the film itself to be in a good state when heated. However, once the film is applied to the surface of the product, due to the addition of product temperature, the film temperature is too high at the end of the film and it ruptures

Therefore, in the current actual production, the pulp molded products before coating often need to add the process of cooling the pulp molded products, which is time-consuming and labor-intensive.

Therefore, the current production line of molded products with film coating has the problems of wasting energy consumption and not being environmentally friendly.

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