Method and apparatus for blow molding parts with smooth surfaces

Details Method and apparatus for blow molding parts with smooth surfaces Method and apparatus for blow molding parts with smooth surfaces

1989-11-13

1991-08-20

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

2491141, 249116, 249135, 264540, 264DIG69, 425526, 425527, 425535, B29C 4904, B28B 734

Patent

active

050412477

ABSTRACT:
A multilayer mold for use in blow molding parts within short cycle times is provided. The multilayer mold has a hard skin layer, an insulating layer and a base containing cooling means. The transient temperature increase of the skin layer of the mold as a hot parison contacts the mold is used to produce smooth surfaces on parts since the skin layer remains hot during parison inflation.

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