Thin-walled metal shell full-body pattern forming mold and processing technology using the mold

Through the high-pressure water swelling technology of the whole-body pattern forming mold, the dimensional difference and special shape problems of the whole-body pattern processing of thin-walled metal shells are solved, the continuity and aesthetics of the pattern are achieved, the processing accuracy and cost are reduced, and the yield rate is improved.

CN113352808BActive Publication Date: 2024-12-31ZHEJIANG HAERS VACUUM CONTAINERS CO LTD
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Patent Information

Application Number
CN202110643684.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-06-09
Publication Date
2024-12-31
Estimated Expiration
2041-06-09

AI Technical Summary

Technical Problem

The prior art is difficult to complete the processing of the whole body pattern of thin-walled metal shells at one time, and the pattern continuity and aesthetics are limited, especially in large-size differences or special-shaped products. The processing accuracy is high and expensive, and it is easy to cause deformation and connection. Seam problem.

Method used

The full-body pattern forming molding mold including upper mold assembly, lower mold cavity assembly, lower mold inner mold assembly and lower mold discharge assembly is adopted. High pressure is used through structures such as Haval sleeve, cavity, lower core rod and elastic clamping assembly. The water swelling technology enables the thin-walled metal shell to form patterns in the cavity, ensuring the continuity and aesthetics of the patterns while reducing the processing accuracy requirements.

Benefits of technology

The pattern processing of large-size differences or special-shaped shells is realized, ensuring that the pattern is clear and beautiful, and does not deviate from the position, improving the yield rate, reducing processing costs, and avoiding deformation and seam problems.

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Abstract

The invention discloses a whole-body pattern forming die for a thin-walled metal shell with reduced processing precision and expanded application scope, and a processing technology using the die. The die comprises an upper die assembly, a lower mold cavity assembly, a lower mold inner mold assembly and a lower mold unloading assembly; the upper die assembly comprises an upper mold cavity head and a Havers sleeve with an inner wall provided with an inclined surface; the lower mold cavity assembly comprises a lower mold cavity head and at least three radially movable and circumferentially uniformly distributed cavities; the inner surface of the cavity is provided with a pattern, and the outer surface is provided with an inclined surface matching the inner wall of the Havers sleeve; the lower mold inner mold assembly comprises a lower core rod and a clamping assembly; the lower mold unloading assembly comprises a fixed plate and an unloading spring; a thin-walled metal shell with one or both ends opened is annealed and polished, and then placed in the die. When the die is closed, the Havers sleeve radially retracts inward to clamp the workpiece, and at the same time forms a processing cavity with a pattern on the inner wall, and high-pressure water enters from the water inlet channel of the lower core rod, so that the workpiece expands outward and adheres to the cavity until the whole-body surface pattern is formed.
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