Plastic plate

Abstract

The invention relates to a plastic plate. A plurality of grooves are formed in one face of a plate body in the length direction of the plate body, the groove bottoms of the grooves protrude out of theother face of the plate body to form bosses, therefore, one face of the plate body is of a groove structure and the other face of the plate body is of a boss structure, so that the plate body is vertically symmetrical, uniformity is better, and stress distribution is favorably more uniform and deformation caused by uneven distribution of shrinkage stress is favorably reduced during injection molding of the plate. According to the plastic plate, through the concave-convex table structure, the amount of warping deformation generated in the injection molding process of the plate can be greatly reduced.

Description

technical field [0001] The present invention relates to plastic sheets. Background technique [0002] Plastic sheets are widely used in people's lives. Due to the characteristics of the plastic material itself, the plastic sheet formed by injection molding of the plastic material will cause serious warping and deformation due to cooling shrinkage or uneven internal stress. The appearance of the board is not beautiful, and due to severe warping and deformation, it will also cause the adverse effect of being unable to install and assemble. [0003] In order to avoid warping and deformation of plastic plates during injection molding, the industry usually improves from the following five aspects: 1. The structure of plastic plates. According to the structure of plastic plates, the amount of pre-deformation is determined, and the determination of pre-deformation is usually Using simulation software to calculate or based on the designer's design experience, however, neither the s...

AI Technical Summary

Problems solved by technology

[0002] Plastic sheets are widely used in people's lives. Due to the characteristics of the plastic material itself, the plastic sheet formed by injection molding of the plastic material will cause serious warping and deformation due to cooling shrinkage or uneven internal stress. The appearance of the board is not beautiful, and due to serious warping and deformation, it will also cause adverse effects that cannot be installed and assembled

[0003] In order to avoid warping and deformation of plastic plates during injection molding, the industry usually improves from the following five aspects: 1. The structure of plastic plates. According to the structure of plastic plates, the amount of pre-deformation is determined, and the determination of pre-deformation is usually Using simulation software to calculate or based on the designer's design experience, however, neither the simulation software calculation nor the designer's design experience is enough to accurately control the amount of pre-deformation, so it is difficult to improve the warping deformation of the plastic plate Relatively large; 2. Mold structure. By optimizing the mold structure, the purpose of improving the warping deformation of the plastic plate is achieved. However, this improvement is only applicable to the production of plastic plates with small warping deformation. For plastic plates with severe warping deformation Production is not applicable. In addition, the entire process of improving the mold structure and producing the mold takes a long time and the mold production cost is high; 3. Injection molding process, by optimizing the injection molding process, that is, by repeatedly trying different process parameters to find the best injection molding process conditions, In this way, the problem of warpage and deformation generated during the injection molding process of plastic plates can be improved. However, the workload of repeatedly debugging parameters is large, and the improvement of warpage deformation is often limited, and it is not conducive to maintaining a wide process window and improving the product stability of plastic plates; 4. Tooling The warping and deformation of the injection molded plastic plate is corrected by customizing additional special tooling and fixtures. The investment cost is high and the overall process is complicated; The warping and deformation of plastic boards is a high risk, and the cost of materials is relatively high. In the industry, it is not common to use material replacement to improve the problem of warping and deformation of plastic boards.

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