Method of two-step blow molding employing a transfer clamp

Details Method of two-step blow molding employing a transfer clamp Method of two-step blow molding employing a transfer clamp

1974-07-22

1976-08-31

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Reactive gas or vapor treatment of work

Work is organic material

264 98, 264296, 425DIG213, 425DIG215, 425DIG216, B29C 1707

Patent

active

039781844

ABSTRACT:
A method for blow molding plastic articles, particularly containers. The method involves shuttling a pre-form blow mold between a parison forming location and a pre-form blowing location, and the transfer of a blown pre-form to a fixed final blow mold. The movement of the pre-form blow mold, both in its shuttling movement and in its open and closing movement, is utilized to transfer the blown pre-form. A clamp arm is secured to each pre-form mold section for engaging the pre-form at the pre-form blowing location and for transferring the pre-form to the final blow mold as the pre-form blow mold moves.
The clamp arms form the finish-defining portions of the final blow mold. When the pre-form blow mold is at its blowing location, the clamp arms register with the mold cavity of the fixed final blow mold to define the complete final article mold. The blown pre-form can be axially stretched during its transfer from the pre-form blowing location to the final blowing location and as the pre-form is retained by the clamp means.

REFERENCES:
patent: 2331702 (1943-10-01), Kopitke
patent: 2718724 (1973-02-01), Holzmann et al.
patent: 3325862 (1967-06-01), Mehnert
patent: 3525123 (1970-08-01), Cines et al.
patent: 3596315 (1971-08-01), Yoshikawa et al.
patent: 3632261 (1972-01-01), Gasior et al.
patent: 3754851 (1973-08-01), Reilly et al.
patent: 3767747 (1973-10-01), Uhlig
patent: 3781395 (1973-12-01), Uhlig

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