Method for making tires and the like

Details Method for making tires and the like Method for making tires and the like

1999-03-19

2000-12-26

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 457, 264 54, B29C 4406

Patent

active

061653977

ABSTRACT:
A method of manufacture for producing a molded article from a polyurethane material, utilizing a spin casting apparatus, preferably a non-pneumatic tire, where a mold that is formed in sections or halves and has an inner cavity formed to have the shape of the article to be manufactured and is separable to release that article after manufacture. The mold is secured to a support plate of the apparatus that is journaled to turn axially imparting a centrifugal force into the mold. The support plate is connected to or is arranged to be connected to a motor assembly for turning, and includes a clamping arrangement for maintaining the mold halves together on the support plate. An annular trough is formed in the mold immediately adjacent to a mold interior cavity inner circumference to receive a polyurethane material liquid passed thereto, and to, in turn, pass that liquid through a trough annular opening or ports into the mold cavity. The polyurethane material is selected to begin to react, forming a foam, as support plate turning is initiated, providing immediate centrifugal forces into the material to uniformly distribute it throughout the mold cavity, compacting it against the cavity walls to form an article having a uniformly increasing porosity from a dense outer circumference to its inner circumference. The preferred polyurethane material used in the process is a composition of polyisocyanates, with water as a polyol, and preferably includes a blowing agent to produce carbon dioxide gas during curing and provides for, after mixing, a time delay in seconds to allow the mixture to fill the mold annular trough and at least partially travel into the mold cavity, before the mixture begins to react.

REFERENCES:
patent: 1260384 (1918-03-01), Huebner
patent: 3331423 (1967-07-01), Guin
patent: 3396773 (1968-08-01), Alderfer
patent: 4060578 (1977-11-01), Kisbany
patent: 4248811 (1981-02-01), Doyle et al.
patent: 4588542 (1986-05-01), Pierce
patent: 4909972 (1990-03-01), Britz
patent: 5229047 (1993-07-01), Becker

Affiliated with

Also associated with

Rating

Method for making tires and the like does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-991294