Stress relieved molded cover assembly and method of making the s

Details Stress relieved molded cover assembly and method of making the s Stress relieved molded cover assembly and method of making the s

1976-03-03

1977-03-15

Hoag, Willard E.

Ammunition and explosives

Igniting devices and systems

52627, 220200, 264254, 264255, 264263, 264267, 264273, 264274, 264328, B29C 500, B29D 300, B29F 100

Patent

active

040118193

ABSTRACT:
Hoop stresses are relieved to eliminate the formation of cracks produced ing the molding of a thermoplastic fitment cover about a support ring structure. Heated plastic is directly molded about the support ring to form any desired cover shape. Hoop stresses created in the cover as the fitment shrinks upon cooling are relieved by means of an interfacing cushion of elastomer. Variation in elastomer configuration provides the flexibility of allowing the elastomer to be "snapped-on" or to be directly molded onto the support ring.

REFERENCES:
patent: 2840856 (1958-07-01), Moxness
patent: 2859483 (1958-11-01), High et al.

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