The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 1985
Filed:
Apr. 22, 1983
David J Klee, Emmanus, PA (US);
Donald J Ehnot, Coopersburg, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
A method is provided for overcoming problems heretofore encountered in systems for continuous cryogenic deflashing of molded articles. Such previous problems include the cracking of the articles as a result of thermal shock suffered by spraying the liquefied gas coolant directly on the article to effect embrittlement of the flash and that of blasting media sticking to the articles. The now disclosed system avoids thermal shock by more gradual cooling of the article and by effecting the desired embrittlement by contact with gaseous coolant obtained by vaporization of the liquefied gas within the treating chamber prior to its contact with the articles. The arrangement of the spray nozzles for the coolant is designed to provide an adequate precooling period to avoid thermal shock and to obtain a temperature profile such that insufficient cooling of the mold release wax is avoided.