Method and apparatus for forming blow molded vessels

摘要

Methods and apparatus for molding a vessel, such as a bottle, with a high quality sealing surface are described herein. In one embodiment, a stepped blow pin can be used to form the sealing surface of a bottle. A stepped blow pin can include a body with a distal end and a proximal end. The blow pin can include a first region that includes a first diameter and a first engagement surface. The blow pin can further include a second region that includes a second diameter. The second region can be positioned between the first region and the distal end. A transition section can be positioned between the first region and second region. The blow pin can also include a top surface position at the proximal end, and a bottom surface positioned at the distal end.

主权项

1. A method of forming a vessel with a high quality sealing surface using a blow molding process, the method including:
providing a mold that comprises:
a first mold body comprising:
a first cavity;a first molding surface; anda first neck forming region; anda second mold body comprising:a second cavity;a second molding surface; anda second neck forming region; providing a plastic material; providing a pin that comprises:
a body with a distal end and a proximal end;a channel passing through the pin from the distal end to the proximal end;a first region with a first diameter, the first region including a first engagement surface;a second region with a second diameter that is greater than the first diameter of the first region, where the second region is positioned between the first region and the distal end;a first transition positioned between the first region and second region;a top surface position at the proximal end; anda bottom surface at the distal end; positioning the plastic material within the mold; inserting the pin into the plastic material, where the first engagement surface is positioned proximate to the first neck forming region and second neck forming region; engaging the plastic material with the first molding surface and second molding surface; cooling the mold to solidify the plastic material; and remove the solidified plastic material from the mold.