Injection molding process of a preform for use in biaxial stretching and blow molding
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United States of America Patent
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Jan 9, 2018
Issued Date -
N/A
app pub date -
Apr 9, 2012
filing date -
Apr 28, 2011
priority date (Note) -
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Abstract
Disclosed is an injection molding device and process for a test tube shaped preform, that can laminate a colored layer at certain positions with a certain thickness accurately. Included is a nozzle section, in which a molten main resin and second resin are joined together to form a joined resin mass, the nozzle section including: an outer flow channel through which the main resin flows, an inner flow channel through which the second resin flows, a cylindrical column-shaped flow channel where the second resin joins the main resin, a first confluence where the main resin flows into the joined flow channel, a second confluence where the second resin flows into the joined flow channel wherein the first confluence is downstream of the second confluence, and a cylindrical shutoff pin inserted in the joined flow channel to open or close one or both the first and second confluences.
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International Classification(s)
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- B29D:PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FRO....
- B29B:PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE ....
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- B65D:CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR....
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
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