Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting
Patent
1977-07-25
1979-11-13
Hoag, W. E.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Forming continuous work followed by cutting
264166, 264173, 264176R, 264209, 264221, 264225, 264230, 264317, 264347, 4251335, 4251742, 4251748E, 425307, 425463, B29D 2304, B29G 200, B29H 714
Patent
active
041743652
ABSTRACT:
A process for the continuous production of a hose formed and vulcanized on a mandrel, comprising continuously forming and advancing a hollow mandrel, continuously forming said hose about said mandrel and continuously vulcanizing said hose while advancing said hose in axial direction with said mandrel, after said mandrel arrives at a predetermined location continuously destroying said mandrel within said hose, and removing the remnants of said mandrel from said hose. The mandrel may be formed of a brittle material such as sintered metal or of a relatively low melting material and its destruction can be effected by longitudinal severance into strips and/or melting by induced current and/or fragmentation by ultrasound. Alternatively the mandrel may be made of soluble material and subsequently dissolved away. Endless reinforcements may also be circulated and the mandrel formed so as to partially embed said reinforcements. Corresponding apparatus is provided.
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patent: 3214313 (1965-10-01), Chisholm
patent: 3255284 (1966-06-01), Meislohn
patent: 3479419 (1969-11-01), Hochhauser
patent: 3690796 (1972-09-01), Borsvold
patent: 3784667 (1974-01-01), Drostholm et al.
patent: 4019939 (1977-04-01), Drostholm et al.
patent: 4019939 (1977-04-01), Barbier et al.
Hoag W. E.
Pahl'sche Gummi--und Asbest-Gesellschaft "PAGUAG"
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