Extrusion head for moldings to be used in the construction of wi

Details Extrusion head for moldings to be used in the construction of wi Extrusion head for moldings to be used in the construction of wi

1980-07-07

1983-05-17

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

15624413, 156500, 264 459, 264173, 425 4C, 425463, 425467, B29F 304

Patent

active

043838120

ABSTRACT:
An extrusion head for moldings to be used in the construction of window, door and the like frames, as well as a molding produced thereby, are provided. A frequently encountered problem in the manufacture of plastics material moldings for window and door frames is represented by the necessity of increasing the mechanical strength and thermal insulation properties thereof, as well as the necessity of minimizing the amount of plastics material utilized. This technical problem is solved by providing an extrusion head affording the possibility of producing in one pass a molding having an outer skin of rigid PVC and an inner lining, adhering to said skin, made of rigid foamed PVC and defining an inner cavity. The extrusion head is provided, for this purpose, with a first mouth and a second mouth, having both a closed contour and being arranged one within the other, which are fed from two supply channels, independent of each other and so constructed as not to interfere with each other.

REFERENCES:
patent: 3189941 (1965-06-01), Reifenhauser
patent: 3331900 (1967-07-01), Thomas
patent: 3533134 (1970-10-01), Blomqvist
patent: 3764642 (1973-10-01), Boutillier
patent: 4130976 (1978-12-01), Kesseler et al.

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