Patent · US Active

Hot runner having reduced valve-stem drool

US7819654B2 · kind B2 · utility

0Cited by

3References

18Claims

0Family size

Assignee

Husky Injection Molding Systems Ltd. · CA

Inventors

Michael Baumann · Herrenberg, DE
Daniel Hontheim · Bettingen, DE
Gilles Lacome · Avril, FR

Key dates

Filing date	Sep 24, 2009
Grant date	Oct 26, 2010
Priority date	—
Expiry date	Sep 24, 2029

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C2045/2889
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Disclosed is a valve-gated hot-runner system, having: (i) a back-up sealing arrangement, including: (i) a plurality of radial gaps associated with a valve stem of a valve actuator, and (ii) a cooling system being positioned relative to the plurality of radial gaps, the cooling system being configured to freeze a drool being made to enter, under pressure, into the plurality of radial gaps, so that the drool that becomes frozen substantially reduces flow of the drool along the valve stem and toward the valve actuator.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.