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Dry powder pressing mold classification and design and production process

May 21, 2018

Dry powder pressed powder pressing mold is the main tool of note related to the quality powder products production, cost, safety and productivity issues, have a very important impact on process and parts. Because a lot of dry powder pressing method, therefore pressed powder is also a wide variety of types of mold, what can be divided into several? How are these types of molds designed?

 

Dry powder pressing dies can be divided into pressing dies, finishing dies, recompression dies, and forging dies. Among them, the density and distribution of press dies and forging dies, in particular, are the main technical indicators in mold design. The mold structure and the choice of mold materials are reasonably designed so that the mold parts have sufficiently high strength, rigidity and hardness, and have high wear resistance and service life, so as to meet the requirements of safe, reliable and easy-to-operate high-pressure working containers.

 

At the same time, attention should be paid to the dry powder pressing mold structure and mold parts of the process ability and interchangeability, and reduce mold manufacturing costs. In order to achieve the above goal, before designing and making a dry powder pressing mold, it is necessary to understand and master the relevant design information as an important basis for mold design.

 

Followed by the product requirements for material design and process design, according to the product drawing for the billet design or perform design, and select the press and press methods, design mold structure sketch; then the blank size as the basic basis, taking into account the process During the process of dimensional changes, the major mold part dimensions were calculated separately.

 

Generally, the size directly related to the cavity is calculated first, and then the other mold part dimensions are calculated according to the mold assembly relationship; finally, the mold assembly drawing and the part drawing are drawn, and the dimensional deviation and the geometric tolerance are marked according to the different working requirements of various molds and selected. Mold materials and technical requirements.

 

The computer-aided design and computer-aided manufacturing technology of dry powder pressing dies is a development trend. In this process, CAD/CAM technology is widely promoted and applied, which can improve the quality of molds, reduce the man-hours for mold manufacturing, shorten the production cycle, and integrate the mold design and manufacturing, improve product quality.

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