초록 ▼

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 ad

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.

대표청구항 ▼

In a method for the preparation of oriented hollow objects of organic plastic material by providing a parison on a core in a formable condition, locating said parison in a blow mold and expanding said parison within said blow mold to form a hollow object, the improvement which comprises: providing s

In a method for the preparation of oriented hollow objects of organic plastic material by providing a parison on a core in a formable condition, locating said parison in a blow mold and expanding said parison within said blow mold to form a hollow object, the improvement which comprises: providing said parison on a first core in a formable condition; locating said first core bearing said parison in a first mold; retaining said parison in said first mold to adjust the temperature thereof for conditions suited for orientation and separating said first core from the parison; transferring said temperature adjusted Parison to a second core from said first mold; locating said second core bearing said parison in a second mold; expanding said parison in said second mold into a finished article; retaining and cooling said finished article in said second mold and separating the second core therefrom, transferring said finished article to a third core from said second mold, locating said third core bearing said finished article laterally of said second mold; and ejecting said finished article from said third core, wherein said cores move only in a direction parallel to the parison axis and said molds move only in a lateral direction relative to the parison axis.