Plastic article or earthenware shaping or treating: apparatus – Shaping orifice and downstream work contacting gaseous...
Patent
1980-09-12
1981-12-15
Hoag, W. E.
Plastic article or earthenware shaping or treating: apparatus
Shaping orifice and downstream work contacting gaseous...
264173, 2642091, 264514, 4251331, 4253261, 425380, 425462, B29F 304, B29C 100, B29D 702
Patent
active
043057039
ABSTRACT:
The invention provides a die assembly comprising a nozzle and at least one mandrel which defines with the nozzle an annular die orifice. The nozzle has a longitudinally extending stem terminating in the sleeve, the mandrel being located coaxially within the sleeve and coupled to the stem of the nozzle by an axially extending screw threaded coupling. The mandrel includes an internal flow passage having an inlet positioned to receive thermoplastic material from a supply passage extending along the nozzle and an outlet positioned to deliver the material to an annular distribution chamber defined by the opposing surfaces of the mandrel and the sleeve. The distribution chamber provides an uninterrupted annular flow path extending from the outlet to the die orifice, thereby avoiding the disadvantage of imperfect material distribution. For the production of multiple-walled tubing, a plurality of die stages coupled together in coaxial relationships are provided, the die components being so coupled by axially extending screw threaded couplings so positioned as not to interfere with the flow of plastic materials.
REFERENCES:
patent: 3024494 (1962-03-01), Szpila
patent: 3241503 (1966-03-01), Schafer
patent: 3538209 (1970-11-01), Hegler
patent: 3677676 (1972-07-01), Hegler
patent: 3694292 (1972-09-01), Schippers et al.
patent: 3743456 (1973-07-01), Cini
patent: 3976414 (1976-08-01), Hegler et al.
patent: 3981663 (1976-09-01), Lupke
patent: 3994646 (1976-11-01), Hauck
patent: 4047868 (1977-09-01), Kudo
patent: 4111630 (1978-09-01), Schiomi et al.
patent: 4134952 (1979-01-01), Yoshikawa et al.
patent: 4182603 (1980-01-01), Knittel
patent: 4185954 (1980-01-01), Murakami et al.
Lupke Gerd P. H.
Lupke Manfred A. A.
LandOfFree
Composite die assembly for use in the production of thermoplasti does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Composite die assembly for use in the production of thermoplasti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite die assembly for use in the production of thermoplasti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1902211