A cladding layer reverse casting mold
A cladding layer and mold technology, which is applied to explosives, offensive equipment, explosives processing equipment, etc., can solve the problems of many bubbles and poor appearance of the powder column, and achieve the effect of improving the cladding quality, convenient operation and simple structure
Active Publication Date: 2020-12-08
SHANXI BEIFANG XINGAN CHEM IND
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Problems solved by technology
The main problems in this process are that after coating, there are many air bubbles on the position of the positioning block and the bottom end surface of the powder column, and the appearance quality of the powder column is poor.
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[0020] A kind of coating reverse casting mold of the present invention, as figure 1 As shown, it includes vacuum box 1, sealing cylinder 2, positioning pin 3, upper mold 4, pouring outer mold 5, positioning inner mold 7, base 8 and feeding interface 9;
[0021] The upper surface of the base 8 is provided with a mold installation groove, the center of the base 8 mold installation groove is provided with a feeding through hole, and the periphery of the base 8 mold installation groove feed through hole is provided with positioning blind holes;
[0022] The pouring outer mold 5 is a cylindrical part whose internal shape matches the shape of the coated drug column, and the upper end of the pouring outer mold 5 is radially provided with positioning pin holes;
[0023] The middle part of the positioning inner mold 7 is a connection plate whose outer diameter is less than the inner diameter of the pouring outer mold 5. The center of the connecting plate is provided with a stepped cyli...
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The invention relates to a reverse casting mold of a cladding layer, and belongs to the field of mold design. The reverse casting mold comprises a vacuum tank, a sealing tube, locating pins, an uppermold, a casting outer mold, a locating inner mold and a base. During casting of the cladding layer, a cladding material can be upwards extruded through a feeding through hole in the base, the locatinginner mold is upwards and tightly erected by the extruded cladding material, so that the locating inner mold and a grain are enabled to upwards and tightly erect the upper mold; the upper mold and the casting outer mold are in axial location through the locating pins; a feeding passage is formed among the lower end and the side wall of the locating inner mold and an inner cavity in the bottom part of the casting outer mold, and the cladding material enters from the feeding passage into the inner cavity of the casting outer mold from bottom to top so as to clad the outer wall of the grain; meanwhile, the vacuum tank is vacuumized through vacuumizing equipment, and the cladding material in the inner cavity of the casting outer mold can be upwards sucked through exhaust vents in a limiting circular truncated cone of the upper mold. After the cladding layer is processed by adopting the reverse casting mold disclosed by the invention, both the inner part and the surface of the cladding layer have no obvious bubbles.
Description
technical field [0001] The invention relates to a cladding layer reverse casting mold, which belongs to the field of mold design. Background technique [0002] The cladding layer is an important part of the propellant charge, and its performance and coating effect directly affect the reliability of the motor charge. The traditional coating process is to directly press the grain into the mold containing the coating material, cast the coating from top to bottom, and use positioning blocks to ensure the coaxiality of the grain and the coating mold. The main problems in this process are that after coating, there are many air bubbles on the position of the positioning block and the bottom end surface of the powder column, and the appearance quality of the powder column is poor. Contents of the invention [0003] The purpose of the present invention is to provide a reverse casting mold for coating layer in order to solve the problem of more air bubbles on the outer surface of t...
Claims
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IPC IPC(8): C06B21/00
CPCC06B21/0058
Inventor 周建辉弋雅静武健薛飞张阿芳胡增艳南换杰张丽荣
Owner SHANXI BEIFANG XINGAN CHEM IND