Hyperspectral display frame hyperspectral traceless injection molding technique

Abstract

The invention belongs to the technical field of injection molding, and relates to a hyperspectral display frame hyperspectral traceless injection molding technique. A prepared display frame is high insurface glossiness and free of defects such as melted marks, flow marks, bubbles and shrink marks, the product surface hardness and quality are greatly improved, and the product percent of pass is improved by 20-30%; before injection molding, condensation is conducted at first, then drying treatment and microwave treatment are conducted, and residual internal stress in raw materials can be effectively and completely eliminated; pressure adjusting in the injection molding process is conducted in three stages, shrinkage cavities and recesses are avoided, the flow marks, seam lines and the layering phenomenon are eliminated, the internal stress produced in the product injection molding process and various defects caused in the injection molding process are reduced, and the product percent ofpass, quality and strength are improved; rapid temperature increase and rapid temperature decrease during application are achieved, the speed tends to be uniform, heat energy is fully utilized, heatenergy losses and production cost are reduced, and the product percent of pass is increased; and the spraying procedure is not needed, pollution to the environment is greatly reduced, and the requirements of environment protection and energy conservation are met.

Description

technical field [0001] The invention belongs to the technical field of injection molding, and relates to a high-gloss traceless injection molding process for a frame of a high-gloss display. Background technique [0002] The high-gloss traceless injection molding process is also known as the rapid thermal cycle injection molding process or the spray-free high-gloss traceless injection molding process. Using this process, any shape on the surface of the mold can be well replicated, so that the surface of the product has no melting marks, no flow marks, No streamlines, no sink marks; high gloss surface, to achieve mirror effect; improve the strength and surface hardness of plastic parts; make thin-wall molding improve injection fluidity, improve product quality and strength; reduce thick-wall molding injection molding cycle by more than 60%; for To improve the surface quality of injection molded parts, the spraying process is usually used. Spraying can ensure that the surface ...

AI Technical Summary

Problems solved by technology

The high-gloss seamless injection molding process is mainly realized by setting hot and cold medium channels in the mold during the plastic injection molding process to quickly cool and heat the mold; for products with simple structures, it can meet the appearance quality requirements and performance requirements, but for For products with complex structures and high precision, the general high-gloss seamless injection molding process cannot achieve satisfactory results; this is due to the uneven heating and cooling of complex precision products in the mold cavity, which causes internal stress and seriously affects the appearance of the product. Resulting in low production efficiency, low qualified rate of finished products, high process cost, etc.