Apparatus for the preparation of hollow plastic articles
OwnerEmery I. Valyiinventor
Life of this patent
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Abstract
Method and apparatus for the preparation of hollow plastic articles wherein an improved injection blow molding process is obtained and improved temperature control of the parison is obtained by the use of a plurality of molds and cores. At least one temperature controlled mold and core is used to adjust the temperature of the parison. The temperature adjusted parison is then stretched and/or blown in at least one second mold by a second core, cooled therein and transferred by at least one third ejector core to additional finishing molds for further cooling or to removal means.
Claims13
An apparatus for forming multi-axially oriented objects of moldable organic plastic material which comprises:
- a first core and a temperature controlled first mold;
- means for providing a parison on said first core, means including said first core to place said parison in said first mold;
- means for separating said parison from said first core while retaining said parison in said first mold to adjust the temperature thereof for orientation conditions;
- a second core and a second mold;
- means for transferring said parison to said second core and said second mold;
- means for axially extending said parison in said second mold and means to expand said parison on said second core in said second mold to provide a finished article which is multi-axially oriented;
- means for separating said finished article from said second core while retaining said finished article in said second mold;
- and means to eject said finished article, wherein said molds are in spaced relationship to each other and move in a lateral direction relative to the parison axis and wherein said cores are in spaced relationship to each other and move in a direction parallel to the parison axis.
An apparatus for forming multi-axially oriented objects of moldable organic plastic material which comprises:
- a first core and a temperature controlled first mold;
- means for providing a parison on said first core;
- means for transferring said parison from said first core to said first mold;
- means for retaining said parison in said first mold free from said first core to adjust the temperature thereof for orientation conditions;
- a second core and a second mold;
- means for transferring said parison from said first mold to said second core and second mold;
- means on said second core for axially extending said parison on said second core in said second mold;
- means to expand said parison on said second core in said second mold to provide a finished article which is multi-axially oriented;
- means for separating said finished article from said second core while retaining said finished article in said second mold;
- a third core for ejecting said finished article from said second mold, wherein said molds are in spaced relationship to each other, said cores are in spaced relationship to each other and move in a direction parallel to the parison axis to engage said molds, and wherein said cores process separate parisons concurrently.
Dependencies are inferred from the claim text.