Process for mixing and conveying polyurethane into a shoe sole m

Details Process for mixing and conveying polyurethane into a shoe sole m Process for mixing and conveying polyurethane into a shoe sole m

1989-05-03

1991-02-05

Simmons, David A.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264244, 26432811, B29C 4580

Patent

active

049903004

ABSTRACT:
A process of mixing isocyanate and a polyol that reacts to form polyurethane used for the production of shoe soles includes the feeding of the isocyanate and the polyol into the bore of an elongated cylinder having a discharge opening at one end, the bore having a conical surface tapering toward that end, mixing the isocyanate and the polyol into a mixture reacting into the polyurethane by rotating an externally threaded worm in the bore, the worm having a shape matching the shape of the bore, and conveying the polyurethane through the opening into a shoe sole mold cavity. The worm and the cylinder in which it operates is disposed along a substantially vertical axis relative to the mold cavity, and the discharge opening is directed downwardly toward the mole cavity. At the end of each mixing and conveying step, the worm is axially shifted in a direction toward the discharge end followed by shifting the worm in an opposite direction for avoiding formation of any dribbles or drips of non-reacted mixture of the isocyanate and the polyol at the discharge end.

REFERENCES:
patent: 3752449 (1973-08-01), Schwab et al.
patent: 3902850 (1975-09-01), Lehnert
patent: 4129636 (1978-12-01), Boden et al.
patent: 4299791 (1981-11-01), Aoki
patent: 4464320 (1984-08-01), Saidla
patent: 4545952 (1985-10-01), Lachi
patent: 4801256 (1989-01-01), Landwehr et al.
patent: 4812268 (1989-03-01), Kamiguchi et al.

Affiliated with

Also associated with

Rating

Process for mixing and conveying polyurethane into a shoe sole m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for mixing and conveying polyurethane into a shoe sole m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for mixing and conveying polyurethane into a shoe sole m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-9328