Balloon blown plastic molding

Details Balloon blown plastic molding Balloon blown plastic molding

B - Operations, Transporting

29

D

18/517

B29D 23/03 (1980.01)

Patent

CA 1038125

BALLOON BLOW PLASTIC MOLDING ABSTRACT OF THE DISCLOSURE This invention covers the core rod or parson pin of a blow mold machine with a rubber tube or balloon so that the plastic is supported internally during a blow molding operation. The fluid that blows the molding inflates the balloon and has contact with the inside of the balloon in- stead of with the plastic of the parison. Cooling fluid circulates inside the balloon so that the molding is cooled from both sides to shorten the cycle. Higher pressure fluid can be used without risk of rupturing the molding and blow- ing can, therefore, be carried out at a lower temperature where the plastic has begun to crystallize and can be orien- ted for greater strength.

201902

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