Hot runner system for molding preforms
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 23, 2002
Grant Date -
N/A
app pub date -
Sep 30, 1999
filing date -
Oct 1, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided a hot runner system comprised of a cylindrical runner block (4) which has a hot runner (12) extending through a core portion thereof to communicate between a gate formed on a lengthwise central portion of a side surface of the runner block (4) and the interior of each of a plurality of nozzle members (3), the runner block (4) being enclosed by band heaters (15), blocking members for the hot runner (12), and support plates (6) standing on a base plate (8) and fitted to both end portions of the runner block (4). The blocking members (16) are fitted into both the end portions of the runner block (4). Heaters (22) and (23) are arranged into the core portion and around the periphery of each blocking member, respectively, for compensating for heat loss due to heat radiation and heat transfer to the support plates (6) and for keeping the temperature of each end portion of the runner block in a predetermined temperature range.
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