Method and apparatus for controlling powder molding press

Details Method and apparatus for controlling powder molding press Method and apparatus for controlling powder molding press

1992-02-04

1994-02-22

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Positioning of a mold part to form a cavity or controlling...

264 401, 264109, 425149, 425150, B29C 4302

Patent

active

052884406

ABSTRACT:
A power molding press is controlled, in which a stepped mold product having a plurality of stepped portions is molded by compressing powder within a mold by relatively moving an upper punch assembly, a lower punch assembly including a plurality of lower punches arranged concentrically with each other and the mold by detecting a speed ratio of moving speeds of the upper and lower punch assemblies moved by the respective driving sources at a time of compressing the respective stepped portions of the mold product during a compressing time from a pressing start time to a pressing completion time, detecting positions of the upper and lower punch assemblies and the mold, detecting a compression ratio of compressed dimensions of the stepped portions of the mold product, and controlling the respective drive sources to control the relative moving speeds of the upper punch assembly, the lower punch assembly and the mold so that the speed ratios substantially accord with the compression ratios of the respective stepped portion of the mold product.

REFERENCES:
patent: 5043111 (1991-08-01), Hinzmann et al.
patent: 5122319 (1992-06-01), Watanabe et al.

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