Zero-degree draft forming part, mold and forming process for grain surface product

By instantly driving the rear mold core out of the zero-degree drafting and forming parts of the surface product to pull out of the cavity, the atmospheric pressure in the vacuum area makes the product concave, solving the problem of excessive drafting angle and insufficient molding quality of the surface product, and achieving 0-degree drafting and surface quality improvement.

CN119635990APending Publication Date: 2025-03-18DONGGUAN HUABEL ELECTRONICS TECH
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Patent Information

Application Number
CN202510061604.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-14
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

In the prior art, the surface marking products have too large draft angle during injection molding, resulting in insufficient product molding quality.

Method used

A surface product zero-degree molding molding part is adopted, including a split module, a rear mold core and a rear mold core pulling. By driving the rear mold core pulling out of the cavity at the moment of opening the mold, the product is concave by using the atmospheric pressure in the vacuum area, thereby avoiding setting the draft angle and achieving a 0-degree drafting.

Benefits of technology

The vacuum negative pressure makes the texture loose and the molding texture avoid excessive interference between the texture and the molding texture, improve the product surface quality, simplify the mold opening action, shorten the mold opening cycle, and improve mass production.

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Abstract

The invention relates to the technical field of injection molds, in particular to a grain surface product zero-degree draft forming part, a mold and a forming process, according to the technical scheme, the grain surface product zero-degree draft forming part is characterized by comprising an oppositely-opened module and two oppositely-opened and oppositely-closed forming sliding blocks, forming concave positions are formed in the forming sliding blocks, and the forming concave positions are provided with forming grains used for forming the appearance surface of a product; the rear mold core is matched with the split module in a mutual opening and closing manner; the rear mold loose core is movably arranged on the rear mold core and gets close to or away from the split mold set, the split mold set, the rear mold core and the rear mold loose core are arranged in a surrounding mode and form a cavity, and the rear mold loose core is used for forming the inner wall of a product; and at the moment of mold opening, the rear mold loose core retreats from the mold cavity, a vacuum area is formed in the inner cavity of the product, and then the appearance of the product shrinks inwards, the product shrinks inwards in a vacuum negative pressure mode, at the moment, a draft angle does not need to be arranged on the appearance face of the product, 0-degree draft is achieved, and the forming quality of the product is effectively improved.
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