The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1997
Filed:
Sep. 18, 1995
Christopherus Bader, Neftenbach, CH;
Luigi Greco, Pfyn, CH;
K.K. Holding AG, Winterthur, CH;
Abstract
When producing injection-moulded or die-cast articles the changeover point between a filling program and a subsequent hold pressure program is determined by measuring the pressure inside the mould cavity at regular intervals, and deriving two classification variables (k.sub.0.sup.+, k.sub.0.sup.-, k.sub.-1.sup.+, k.sub.-1.sup.-, k.sub.-2.sup.+, k.sub.-2.sup.-) from each of the last three measured values (p.sub.0, p.sub.-1, p.sub.-2) in classification stages (K.sub.0, K.sub.-1, K.sub.-2) and combining them into weighting variables (g.sup.-, g.sup.0, g.sup.+) in a logic stage (V) using the methods of fuzzy logic. In an evaluation stage (A), by means of evaluation functions a switching value (s) is derived from these and compared with a threshold value in a decision stage (E). If the switching value oversteps the threshold, it is deduced that the changeover point has been reached.