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Title:
【発明の名称】低い溶融温度を有する金属合金をキャスティングするためのバルブメカニズム
Document Type and Number:
Japanese Patent JPH05505145
Kind Code:
A
Abstract:
In the casting of metal alloys with low melting temperatures, an improved control system for lowering an injection piston in an injection cylinder is provided to avoid porosity occurring in castings. There is a fluid operated drive cylinder with a drive piston connected to the injection piston. A transducer is linked to the injection piston to provide an indication of location, and a controller compares the position of the injection piston with a predetermined time/distance profile and produces an injection stroke signal which is used to control the drive cylinder and ensure the injection piston follows the time/distance profile.

Inventors:
Kid, Thomas F
Thomson, Stephan A
Application Number:
JP50538591A
Publication Date:
August 05, 1993
Filing Date:
March 21, 1991
Export Citation:
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Assignee:
Electrovert Limited
International Classes:
B22D17/04; B22D17/30; B22D17/32; B22D17/02; B22D39/02; (IPC1-7): B22D17/02; B22D17/30; B22D39/02
Domestic Patent References:
JPS5339855A1978-04-12
JPH0195856A1989-04-13
Attorney, Agent or Firm:
Hisami Fukami (4 outside)