Abrasive material

US4364746A · kind A · utility

Assignee

• SIA, Schweizer Schmirgel- u. Schlief-Industrie AG · CH

Inventors

• Diethelm Bitzer · Hechingen, DE
• Jost Kramis · Islikon, CH
• Jakob Ackermann · Wigoltingen, CH

Key dates

• Filing date: Oct 15, 1980
• Grant date: Dec 21, 1982
• Expiry date: Oct 15, 2000

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B24D3/344
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An abrasive compound in which individual abrasive grains of various types are joined in a preliminary step into the formation of so-called agglomerated abrasive grains, each of which may contain a number of individual grains. The particular feature of the invention is that the abrasive compound which is to be applied to a suitable surface to constitute an abrasive or grinding tool consists of a mixture of agglomerated abrasive grains of substantially different types. The differences in the agglomerated abrasive grain refer principally to the abrasive power and strength and the ability to sustain abrading forces, i.e., they are related to the endurance of the agglomerated grains under conditions of use. The substantially different strengths or properties of the agglomerated abrasive grains may derive from different types of binder used to create them from the individual grains, different methods of hardening or drying, different quantities of binder, or different constituent individual grains. The mixture of agglomerated abrasive grains of substantially different strength may be used with a component of non-agglomerated grains as well as with a reinforcing additive of short, chopped…