Cast annular laminates and method and apparatus for making same

Details Cast annular laminates and method and apparatus for making same Cast annular laminates and method and apparatus for making same

1977-03-14

1978-07-25

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264312, B29C 504, B29D 2308, B29H 300, B29H 502

Patent

active

041029712

ABSTRACT:
A laminated product such as a tire is cast from chemically extending liquids which form a laminated solid in a mold. The mold cavity is closed in preparation for use except for casting fluid inlet ports and exhaust vents. The mold cavity defines the shape of the product to be cast. Two or more chemically extendable liquids are injected into the mold without mixing through the inlet ports. Each liquid is injected through a different port. After injection, the liquids are arranged in alternate circumferential segments within the annular space. At least one of the inner and outer surfaces which define the mold cavity is then rotated about the common axis to impart a spiral configuration to each of the injcted liquids. The liquids are then allowed to chemically extend to solids and form a laminated product such as a tire. The products, when they comprise alternate layers of high and low elastic modulus materials, have better resistance to flex cracking than non-layered materials of similar composition having similar average stiffness.

REFERENCES:
patent: 2710425 (1955-06-01), Rhodes
patent: 2897540 (1959-08-01), Rhodes
patent: 3200180 (1965-08-01), Russ et al.
patent: 3555141 (1971-01-01), Beneze
patent: 3695808 (1972-10-01), Beneze

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