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Powder material forming pipe fitting forming mold and method

A technology for material molding and molding molds, which is applied in the field of powder dry pressing molding methods and molds for pipes with large length-to-diameter ratio and no draft angle, can solve the problems of large demoulding force, difficult manufacturing, and reduced demoulding force, and achieve High molding efficiency, simplified compression molding process, and reduced demoulding force

Active Publication Date: 2011-10-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The idea of ​​the present invention is: by adopting a combined outer mold and a wedge-shaped spliced ​​core column, the demoulding force when the pipe fittings are demoulding is greatly reduced, and the problems caused by the demoulding of powder dry-pressed pipe fittings with a large length-to-diameter ratio and no draft angle are solved. The problem of great force but difficult production

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  • Powder material forming pipe fitting forming mold and method
  • Powder material forming pipe fitting forming mold and method
  • Powder material forming pipe fitting forming mold and method

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Embodiment Construction

[0028] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0029] refer to Figure 1-2 , The powder compression molding mold of the present invention mainly includes: a mold fixing plate 1, an outer mold 2, an upper stem 3, a lower stem 4, a stem long pin 5, a punch 6 and eyebolts. Among them, the mold fixing plate 1 is a square plate, on which is processed a stem positioning hole 1a with a clearance fit with the lower stem 4 and a pin hole 1b with a clearance fit with the positioning pin 7, which is used to ensure that the stem and the inner circular surface of the outer mold Concentric; the outer mold 2 is connected together by two valve molds by the outer mold fastening bolts 8, the two valve molds have the same structure, the upper part is half cylindrical, and the two side walls are respectively processed with outer mold fastening bolts 8 Matching threaded hole 2b, recessed platform 2c and bolt matching light hole ...

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Abstract

The invention relates to a powder material forming pipe fitting forming mold and method. Demoulding of the outer wall of a cylindrical part can be realized by virtue of separation of an outer mould, the demoulding force during demoulding of a core column can be greatly reduced by virtue of dividing the core column into two parts with wedge surfaces, the demoulding of a powder pipe fitting is convenient, and the production efficiency is improved. Simultaneously, one-time forming of non-pattern draft powder dry-pressing pipe fitting of different section shapes can be realized by virtue of changing the section shapes of formed parts of the outer mould and the core column, so that the forming efficiency is high, the formed part is not subjected to mechanical machining damage, and the structural strength is obviously higher than that of secondary machining pieces.

Description

technical field [0001] The invention relates to a molding die and a molding method for forming a pipe fitting from a powder material, in particular to a powder dry pressing molding method and a mold for a pipe fitting with a large length-to-diameter ratio and no draft angle. Background technique [0002] Dry pressing molding is a molding method in which dry powder blanks are filled into a metal mold cavity, and the desired molded parts are obtained by applying pressure and heating to make it a dense blank. Due to its high production efficiency, less labor required, low scrap rate, short production cycle, high density and high strength of the products produced, dry pressing is suitable for mass industrial production and is widely used in composite material powder, metal powder and ceramic powder. forming. This type of powder compacting device and method has been proposed. For example, a powder compacting device and method are proposed in Japanese Patent No. 2000-397967, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/12
Inventor 齐乐华潘广镇李贺军付业伟费杰施俭亮郭学平张兆民朱文婷
Owner NORTHWESTERN POLYTECHNICAL UNIV