发明名称 |
HYDROSTATISCHER ODER PNEUMATISCHER ANTRIEB SOWIE VERFAHREN ZU SEINEM BETRIEB |
摘要 |
<p>A hydrostatic or pneumatic drive for driving a mass to be accelerated and decelerated, such as in a die casting or injection moulding machine, has a controllable valve arrangement which is operable to vary the fluid flow rate therethrough. The fluid flow rate is controlled by a reference value control generator operable to produce a ramp having superimposed thereon further control pulses. Such control pulses are a positive control pulse at the beginning of the rising slope and at the end of the falling slope of the ramp and a negative control pulse at the end of the rising slope and at the beginning of the falling slope of the ramp. Each control pulse has a volume which corresponds to a so-called compression volume factor which reflects the compressibility of the fluid used in the drive and also of the elasticity of ducts which expand by fluid pressure.</p> |
申请公布号 |
DE3222008(A1) |
申请公布日期 |
1983.12.15 |
申请号 |
DE19823222008 |
申请日期 |
1982.06.11 |
申请人 |
SPERRY-VICKERS ZWEIGNIEDERLASSUNG DER SPERRY GMBH, 6380 BAD HOMBURG, DE |
发明人 |
SIEGRIST, RONALD, 9242 OBERUZWIL, CH |
分类号 |
B22D17/32;B29C45/82;F15B11/04;F15B21/08;(IPC1-7):15B11/04 |
主分类号 |
B22D17/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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