Quick-cooling heated mold injection molding process and equipment thereof

Abstract

The invention discloses a quick-cooling heated mold injection molding process and equipment thereof. The process comprises the steps of: heating dried resin to a molten state, preheating mold cavities to a processing temperature with a mold temperature controller, preparing low-temperature water, closing the mold, controlling a rubber injection system to inject rubber, controlling a high-pressure cooling system to inject low-temperature water for cooling when the temperature of the mold cavities is 5 DEG C higher than a set processing temperature, and stopping cooling when the temperature of the mold cavities is reduced below a resin softening point and the injection product is cured; and opening the mold and taking out an injection product. The equipment is of a mold consisting of a front mold cavity, a rear mold cavity and a mold chamber, the front and rear mold cavities are respectively and internally provided with a heating device and a cooling device, and thermal baffles avoiding heat loss are arranged on the front and rear mold cavities. The invention aims at overcoming the defects in the prior art, and provides a quick-cooling heated mold injection molding process and equipment thereof, which can effectively enhance formed product quality and yield, be applicable to various injection-molded materials and improve deficiencies of the traditional injection process.

Description

[technical field] [0001] The invention relates to an injection molding process and its equipment, in particular to a hot mold rapid cooling injection molding process and its equipment. [Background technique] [0002] At present, the traditional injection molding process is completed by cooling the mold to heat and then cooling cycle, but the traditional injection molding process has the following defects: [0003] 1. Only a constant mold temperature can be maintained. The mold temperature cannot exceed the thermal deformation turning point of the resin. Once the mold temperature exceeds the thermal deformation turning point temperature of the molded resin, the molded parts cannot be solidified or need too long cooling time to solidify; [0004] 2. When molding plastic products, the water line on the surface of the plastic product cannot be eliminated, and the glossiness of the surface of the plastic product cannot be improved, even if the surface of the mold with high gloss ...

AI Technical Summary

Problems solved by technology

[0003] 1. Only a constant mold temperature can be maintained. The mold temperature cannot exceed the thermal deformation turning point of the resin. Once the mold temperature exceeds the thermal deformation turning point temperature of the molded resin, the molded part cannot be solidified or needs too long cooling time to solidify;

[0004] 2. When molding plastic products, the water line on the surface of the plastic product cannot be eliminated, and the glossiness of the surface of the plastic product cannot be improved. Even if the surface of the mold with high gloss is used, there is no way to achieve the high gloss effect;

[0005] 3. When molding resin containing metal powder, the precipitated strip metal traces cannot be eliminated, and the bright metal surface effect cannot be achieved;

[0006] 4. When molding resin containing carbon fiber or glass fiber, it is also impossible to eliminate the water line on the surface of the product, and it is also impossible to improve the gloss of the product surface. Even if the surface of the mold with high gloss is used, there is no way to achieve the high gloss effect

[0007] 5. The rapid cooling effect cannot be achieved during the metal die-casting process, resulting in an excessively long metal casting cycle

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