Extrusion head

Details Extrusion head Extrusion head

1983-08-23

1985-10-22

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

Extrusion shaping means

425185, 425188, 425462, 425466, B29F 304

Patent

active

045485682

ABSTRACT:
An extrusion head for producing flat profiles such as tread strips for automotive vehicles from three or more different rubber or plastics materials is disclosed. The head comprises a fixed central portion and upper and lower portions pivotally connected thereto, and is fed with the different mixtures by a plurality of screw or worm extrusion devices. Between the upper and central portion and the central and lower portions of the head, insert members are located. In the upper and/or lower surface of each insert member, flow channels for the mixtures are defined, the flow channels each being bounded upwardly or downwardly as appropriate, by a plane surface of one of the portions of the head. The insert members are axially divided and are made in one piece. The flow channels each have a longitudinal axis of symmetry and such axes lie in a common vertical plane. Such an arrangement permits the profile to be changed merely by replacing one or both insert members, permits the worms or screws to be readily removed for cleaning purposes and also ensures that the flow rates in each of the flow channels is substantially constant, thereby avoiding problems of pre-vulcanization.

REFERENCES:
patent: 3486195 (1969-12-01), Greenwood et al.
patent: 3902835 (1975-09-01), Theysohn
patent: 4137027 (1979-01-01), Ruger
patent: 4405547 (1983-09-01), Koch et al.

Affiliated with

Also associated with

Rating

Extrusion head does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-119728