Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work – Work is organic material
Patent
1974-10-21
1976-12-07
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, B29C 1707
Patent
active
RE0290653
ABSTRACT:
An improved method for forming blow molded articles of enhanced physical characteristics by orienting the material during the formation of the article. A two-stage blowing operation is provided wherein a pre-form blow mold effects a uniform and controllable transfer of heat from a freely extruded tube. The pre-form is conditioned, both thermally and dimensionally, within the pre-form for most effective orientation during a subsequent final blowing operation.
Manipulatively, the disclosed method provides a completely overlapped pre-blowing and final blowing operation, and more than one set of pre-blow and final blow molds may be utilized at a single extruder orifice, if desired. Further, the direction and extent of movement of the molds adapts the method to presently existing blow molding machines, while increasing the machine output.
Successively utilized blow tubes form and reform the open or blowing end of the tube to a final configuration. In the manufacture of containers, the two successively utilized blow tubes form an accurate, dimensionally stable finish for a bottle while also severing any neck flash from the finish.
REFERENCES:
patent: 2715751 (1955-08-01), Weber
patent: 3032809 (1962-05-01), Willard
patent: 3081489 (1963-03-01), Jackson et al.
patent: 3224038 (1965-12-01), Budesheim
patent: 3325862 (1967-06-01), Mehnert
patent: 3632261 (1972-01-01), Gasior et al.
Holler E. J.
Owens--Illinois, Inc.
Rice Philip M.
Silbaugh Jan H.
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