Electric heating type rapid heat cycle molding injection mold

Abstract

The invention relates to an electric heating type rapid heat cycle molding injection mold. The mold comprises a core plate and a cavity plate, wherein the core plate and the cavity plate are respectively connected with support plates; the support plates are characterized by connecting a plurality of ordinary steel plates with poor heat-conducting properties in a criss-cross manner to form a latticed structure; part of meshes in closed holes formed by matching the support plates with the core plate and the cavity plate are preferably selected and heating elements are installed inside the meshes by utilizing special heat insulation devices to achieve rapid heating of the molding surface of the mold; the cavity plate is formed by a molding layer and a base layer; the base layer is prepared with ordinary hot work mold steel by adopting a conventional process; the molding layer is prepared by superposing high-quality mold steel with good heat fatigue resistance and terrific polishing property on the surface of the base layer by adopting an overlay welding method; cooling pipelines are arranged on the core plate and the base layer of the cavity plate to achieve rapid cooling of the molding surface of the mold. The electric heating type rapid heat cycle molding injection mold has the beneficial effect that innovative designs of the material, the structure, and the like are put forward.

Description

technical field [0001] The invention belongs to the technical field of injection molding in the subject of material processing, and in particular relates to an electrically heated high-gloss injection mold. Background technique [0002] As a green molding technology with great development potential, high-gloss injection molding technology has attracted a large number of scholars to research and promote it. However, the development of high-gloss injection molding technology is still immature, and there are still many problems to be solved. Especially in high-gloss injection mold design and manufacturing technology, the existing problems are particularly prominent. [0003] Since the molding surface of the high-gloss injection mold requires extremely high polishing precision, firstly, the mold material must have excellent polishing performance; secondly, due to the repeated alternating of rapid heating and rapid cooling in the normal production process, the molded parts of the...

AI Technical Summary

Problems solved by technology

[0003] Since the molding surface of the high-gloss injection mold requires extremely high polishing precision, firstly, the mold material must have excellent polishing performance; secondly, due to the repeated alternating of rapid heating and rapid cooling in the normal production process, the molded parts of the high-gloss injection mold are easy to Thermal fatigue damage occurs, which leads to mold failure. Therefore, the cavity plate material must also have good heat resistance, thermal deformation and thermal fatigue resistance.

According to the above requirements for high-gloss injection mold cavity plate materials, people often choose imported high-quality mold steels, such as CENAI from Hitachi, NAK80 from Daido, and VIDAR SUPERIOR from Sweden. These mold materials have good dimensional stability. It is the first choice for high-gloss injection mold materials because of its excellent performance, high polishing performance and high thermal shock and thermal fatigue resistance. However, these high-quality steel materials are expensive, resulting in high mold costs.

[0004] The existing electrically heated high-gloss injection mold still has the outstanding problem of low thermal cycle efficiency. In order to shorten the molding cycle and improve injection production efficiency, the structural design of the electrically heated high-gloss injection mold must fully consider the requirements of rapid heating and rapid cooling of the mold. This requires that a special design method or structure must be used in the mold design to minimize the heat capacity of the mold, thereby improving the thermal cycle efficiency

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