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:
Aug. 14, 2001
Filed:
Apr. 05, 1999
Herbert Günther, Allendorf/Eder, DE;
Gunther Heisskanaltechnik GmbH, Frankenberg, DE;
Abstract
A valve-type nozzle (,) is provided for use in hot runner systems through which a plastic material melt is fed under high pressure to a separable and coolable tool having at least one mold cavity (K) for injection-molded items. The nozzle is heatable and comprises at least one needle valve (,) supported by sliding guides (,), the arrangement being such that the melt, which is fed trough a material pipe (,), passes around at least a lower section (,) of the needle valve (,). The nozzle (,) further comprises, in an antechamber (,) upstream of the mold cavity (K), at least one outlet (,) adapted to receive a closely fitting needle end (,). The needle valve (,) includes in its lower section (,), upstream of the needle end, a pressure-relief arrangement that is in direct flow-connection with the antechamber (,). The pressure-relief arrangement comprises, in a guide piece (,), at least one branch-off bore (,) that runs radially at an angle of 90° to the longitudinal direction (L) of the needle valve (,).