Blow molding apparatus for staged inflation of an extruded paris

Details Blow molding apparatus for staged inflation of an extruded paris Blow molding apparatus for staged inflation of an extruded paris

1975-01-13

1976-02-24

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

425387B, 425DIG206, 425DIG215, B29C 506, B29C 1707

Patent

active

039402258

ABSTRACT:
An improved apparatus 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 apparatus 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: 3632261 (1972-01-01), Waechter

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