Method of abrading

Details Method of abrading Method of abrading

1990-01-29

1991-02-26

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51289R, 51165R, 73 8, 73 9, B24B 100

Patent

active

049951971

ABSTRACT:
A method of abrading a tire tread compound to measure its irregular wear characteristics, includes the steps of abrading each of a plurality of sample wheels in rotating engagement with a respective abrasive member. An outer layer of each sample wheel is made of a tire tread compound to be abraded. The velocity of the sample wheels relative to the velocity of the abrasive members defines a first slip value. Each sample wheel is abraded in rotating engagement with a plurality of abrasive members at the first slip value. The loss of the tire tread compound of each sample wheel at the first slip value is then measured. Each sample wheel is then abraded in rotating engagement with a plurality of respective abrasive members at a second slip value. The loss of the tire tread compound of each sample member at the second slip value is then measured. Each sample wheel is then abraded in rotating engagement with a plurality of respective abrasive members at a third slip value. The loss of the tire tread compound due to abrasion at the third slip value is then measured. The second slip value causes a higher level of abrasion severity than the first slip value. The third slip value in turn causes a higher level of abrasion severity than the second slip value. The irregular wear characteristics of the tire tread compound is measured based on the loss of the compound due to abrasion at each of the different slip values.

REFERENCES:
patent: 3893330 (1975-07-01), Shute et al.
patent: 3899917 (1975-09-01), Kisbany
patent: 4779447 (1988-10-01), Rath
Letter from John M. Funt to Users of Cabot Abrader Data, dated Jan. 19, 1988, (Exhibit B).
Declaration of Chiung-Huei Shieh, John M. Funt, and George B. Ouyang, (Exhibit A).
Declaration of John M. Funt, (Exhibit C).
Carbon Black and Tire Wear Slides, dated Fall 1988, (Exhibit D).
Encyclopedia of Polymer Science and Technology, vol. 1, Second Edition, 1985.
Encyclopedia of Polymer Science and Technology, vol. 1, First Edition, 1964.
Paper No. 41 to the American Chemical Society, Division of Rubber Chemistry, Miami Beach, Florida, Apr. 1971, Entitled "Studies on Abrasion and Traction Using the Scanning Electron Microscope," by B. B. Boonstra, F. A. Heckman and A. Kabaya, Apr., 1971.
Tire Science and Technology 2 (4), (1974), Entitled "Traction-Abrasion Relationships of Tread Compounds Containing New Reinforcing Carbon Blacks," by B. B. Boonstra.
International Polymer Science and Technology, vol. 16, No. 2, 1989, entitled "Test Methods and Equipment for Abrasion and Friction of Rubber," by K. Mitsuhashi.

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