초록 ▼

In an injection blow molding process for making plastic receptacles, an injection station is provided for injection molding a parison of selected configuration. An expansion and blowing station follows for initially expanding the parison to a predetermined length, and thereafter the parison is blow

In an injection blow molding process for making plastic receptacles, an injection station is provided for injection molding a parison of selected configuration. An expansion and blowing station follows for initially expanding the parison to a predetermined length, and thereafter the parison is blow molded into a predetermined lateral and final configuration to thereby biaxially orient the molecular structure of the parison. An ejection station is provided for removing the finished product from the apparatus. The parison is transferred along a first path away from the injection station, along a second path which is normal to the first path and then along a third path parallel to the first path to the expansion and blowing station. At the same time, a finished product is transferred from the blowing station to the ejection station along a corresponding path. The blow molding station is adjustable or interchangeable so that different size containers can be molded without changing the size of the injection cavity. The apparatus may also be designed with a core pin arrangement to insert a liner within an outer plastic parison shell prior to the blow molding process at which time the liner and parison shell will weld together to form a finished container. Close temperature control is provided with the parison being maintained with a desired temperature range to retain the biaxial orientation. Finally, the apparatus is designed to facilitate removal of the finished product to further work stations for subsequent work thereon.

대표청구항 ▼

An ejection blow molding apparatus for making plastic receptacles comprising: an injection station, including means at the injection station injection molding a parison of selected configuration; an expansion and blowing station including means to position the parison and then to expand the parison

An ejection blow molding apparatus for making plastic receptacles comprising: an injection station, including means at the injection station injection molding a parison of selected configuration; an expansion and blowing station including means to position the parison and then to expand the parison to a predetermined length and then to blow mold the parison into a predetermined lateral and final configuration; an ejection station with product removing means at the ejection station removing the finished product from the apparatus; the injection station, expansion and blowing station, and ejection station being positioned in an adjacent linear side-by-side cooperating arrangement; a linear transfer means being reciproally movable toward and away from the injection station, expansion, and blowing station, and ejection station and being reciprocally movable in a path perpendicular to the direction of reciprocal movement toward and away from the stations; the linear transfer means being positioned with respect to the injection station, expansion and blowing station, and ejection station so that movement thereof away from the stations will permit the linear transfer means to remove a parison from the injection station along a first path and to simultaneously remove a finished product along a second path parallel to the first path and then along a third path perpendicular to the first and second paths to bring the parison into alignment with the expansion and blowing station and the finished product into alignment with the ejection station and then transfer the parison along a fourth path into the expansion and blowing station and simultaneously the finished product along a fifth path parallel to the fourth path to the ejection station.