Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – With mold element formation or removal
Patent
1981-12-21
1983-11-15
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
With mold element formation or removal
264178R, 264236, 264347, B29D 702
Patent
active
044155182
ABSTRACT:
Process for continuously curing an elastomeric jacket on a cable, comprising continuously passing a cable having an uncured elastomeric jacket thereon, encased within an outer temporary mold of heat conductive metallic material, e.g. metallic lead, of sufficient encasing layer thickness for protectively confining and supporting therewithin the elastomeric jacket and cable thereat, through a vulcanizing zone maintained at substantially atmospheric pressure and provided with a heat transfer bath, e.g. a fusible mixture including sodium nitrate, sodium nitrite, potassium nitrate and potassium nitrite, while applying the bath to the cable at a selective bath temperature, e.g. about 400.degree.-500.degree. F., sufficient for vulcanizing the mold encased elastomeric jacket in situ during passage of the cable through the zone whereby to vulcanize the jacket in situ substantially free from stress, damage or disturbance, and with subsequent cooling thereof prior to removal of the mold therefrom.
REFERENCES:
patent: 2971221 (1961-02-01), Schoenbeck
patent: 3051992 (1962-09-01), Bradley
patent: 3255284 (1966-06-01), Meislohn
patent: 3284259 (1966-11-01), Galloway et al.
patent: 3690796 (1972-09-01), Borsvold
patent: 3883384 (1975-05-01), Hopkins
patent: 4029450 (1977-06-01), Caser
patent: 4112031 (1978-09-01), Gohlisch
patent: 4226823 (1980-10-01), Jansson et al.
Keilly Ronald J.
Pochurek Gerald M.
Czaja Donald E.
Thompson W.
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