Tubular extrusion die

Details Tubular extrusion die Tubular extrusion die

1979-11-27

1981-05-19

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Core, pin or insert member

425380, B29F 304

Patent

active

042682398

ABSTRACT:
There are disclosed improved die structures for the extrusion of a tubular sheet of thermoplastic film material. The die comprises a housing having an opening therethrough, a mandrel located in the opening and spaced from the wall thereof to form an annular conduit, and a base plate positioned at one end of the opening and attached to the housing. The mandrel is spaced from the base plate by a plurality of spacers and releasably connected thereto by attaching means extending through some or all of the spacers. Recesses are optionally provided in the immediate vicinity of each spacer to increase the volume of molten material flowing past the spacer.

REFERENCES:
patent: 3146495 (1964-09-01), Sanford
patent: 3193879 (1965-07-01), Corbett
patent: 3321805 (1967-05-01), Given
patent: 3570062 (1967-03-01), Dukert et al.
patent: 3709645 (1973-01-01), Mraz
patent: 3756758 (1973-09-01), Prall
patent: 3809515 (1974-05-01), Farrell
patent: 3899276 (1975-08-01), Sokolow
patent: 4045154 (1977-08-01), Ratheiser

Affiliated with

Also associated with

Rating

Tubular extrusion die does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tubular extrusion die, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tubular extrusion die will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1487540