Method of operating a gas sealing valve and valve equipped plastic processing installation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 29, 1993
Issued Date -
N/A
app pub date -
Oct 9, 1991
filing date -
Mar 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method is disclosed for operating a valve needle for plastic processing plants. The needle valve may be controlled by a control valve, which in turn is controlled by a working gas volume in order to prevent formation of internal waviness in injection molded articles even under very high gas pressures and to assure high flexibility in production without refitting delays. During plastic mass injection the valve needle seals tightly. During gas return the valve needle remains open until the gas bubble in the mold cavity is completely emptied.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully