Back to results
US 4,116,606 AGranted
Apparatus for the preparation of hollow plastic articles
OwnerEmery I. Valyiinventor
Life of this patent
Estimating the term…
Abstract
Method and apparatus for the preparation of hollow plastic articles wherein improved temperature control of the parison is obtained by altering the heat content of a parison by a first, temperature controlled mold and core, transferring the parison to a second, temperature controlled mold, and substantially equalizing the temperature distribution of the parison by heat exchange with the second mold.
Claims19
An apparatus for forming oriented hollow articles of moldable organic plastic material which comprises:
- a temperature controlled first core and a temperature controlled first mold;
- means for providing an organic plastic parison on said first core in said first mold in a formable condition at a temperature substantially above that required for orientation of said plastic;
- means for rapidly altering the heat content of said parison on said first core in said first mold with an unequal distribution of temperature across the walls of said parison resulting and to result substantially in the heat content of said parison corresponding to an average temperature suited for orientation;
- a temperature controlled second core and second mold in spaced relationship to said first core and first mold;
- means to transfer said first core bearing said parison to said second mold;
- means for partially forming said parison located on said first core in said second mold to separate said parison from said first core and conform said parison to the shape of said second mold and to have an inside configuration shaped to permit insertion of said second core therein in substantially full contact therewith;
- means for separating said first core and second mold and partially formed parison contained therein;
- means for inserting the second core into the partially formed parison contained in the second mold;
- means for controlling the temperature of said parison in said second mold on said second core to substantially equalize the temperature distribution of said parison without substantially altering the heat content of the parison;
- a blow mold in spaced relationship to said second mold;
- means for transferring the partially formed parison to said blow mold;
- the means for fully expanding the partially formed parison in said blow mold.
9 more elements
An apparatus for forming oriented hollow articles of moldable organic plastic material which comprises:
- a temperature controlled first core and a temperature controlled first mold;
- means for providing an organic plastic parison on said first core in said first mold in a formable condition at a temperature substantially above that required for orientation of said plastic;
- means for rapidly altering the heat content of said parison on said first core in said first mold with an unequal distribution of temperature across the walls of said parison resulting and to result substantially in the heat content of said parison corresponding to an average temperature suited for orientation;
- a temperature controlled second mold and a second core in spaced relationship to said first mold and first core;
- means to transfer said first core bearing said parison to said second mold;
- means for conforming said parison to the shape of said second mold and to have an inside configuration shaped to permit insertion of said second core therein and for separating said parison from said first core;
- means for separating said first core and second mold and parison contained therein;
- means for inserting the second core into the parison contained in the second mold;
- means for controlling the temperature of said parison in said second mold on said second core to substantially equalize the temperature distribution of said parison without substantially altering the heat content of the parison;
- a blow mold in spaced relationship to said second mold;
- means for transferring the parison to said blow mold;
- and means for fully expanding the parison in said blow mold.
9 more elements
Dependencies are inferred from the claim text.