SU1144861A1 - Composition for manufacturing abrasive tool - Google Patents

Abstract

MIXTURE FOR THE MANUFACTURE OF ABRASIVE TOOL, containing abrasive material, ceramic binder and temporary binder, characterized in that, in order to increase the strength of the freshly formed and dried product, as a temporary binder, it contains a water-soluble preparation C1U with the following ratio of components, .%: Abrasive material 66.0-84.5 Ceramic bond 12.3-30.0 Water soluble preparation C1U3.0-7.5; (L with

Description

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00 Od The invention relates to the manufacture of an abrasive tool on a ceramic bond. A known blend for the manufacture of an abrasive tool, containing an abrasive (65-88 wt.%), A ceramic bond (5-27 wt.%), An adhesive additive (1-4 wt.%) And as a temporary binder 15-35. % aqueous solution of methyl methacrylate copolymer with sodium salt of methacrylic acid (1-4 wt.%). However, this mixture has a low strength freshly molded and dried product. In addition, dextrin produced from food raw material, starch, is used as the sizing additive; The known mass for the manufacture of an abrasive tool, including an abrasive material, a ceramic bond, a temporary binder (dextrin), an adhesive additive (liquid glass), and a temporary CMC 2 hardener. The examples given in the application for raw material are only an abrasive mixture. m of corundum materials. The effect of hardening is due to the interaction of liquid glass CMC. In carbide-coated abrasive mixtures a), and the use of liquid glass is contraindicated in silicon, since its presence causes defects on the core. Consequently, in the absence of liquid glass, there will be no hardening effect in the presence of CMC. The strength of the delivery of corundum billets and without the addition of temporary sludge is higher by a factor of 2-3 compared with the strength of the raw silicon-carbide blanks in the absence of an adhesive in it. Therefore, the raw material rejection of carbide-silicon blanks under production conditions is much higher than the raw corundum billet. The abrasive blend for this application does not solve the issue of excluding the addition of dextrin, which is a food product. Closest to the invention is the blend of making an abrasive tool, including an abrasive, a ceramic bond, and dextrin is a temporary binder. The dextrin particles, swelling in the water, envelop the grains of the abrasive and the particles of the bond, glue them. 61I giving a freshly formed product a certain strength h. The disadvantages of the known mixture are the low strength of the freshly formed and dried product and the deficiency of dextrin. The aim of the invention is to increase the strength of the freshly molded and dried product, replacing the scarce raw material. This goal is achieved in that the mixture for the manufacture of an abrasive tool, which includes an abrasive material, a ceramic bond and a temporary binder, as a temporary binder is introduced a water-soluble preparation C1U, with a density of 1.28 g / cm, in the following ratio components, wt.%: Abrasive material 66.0-84.5 Ceramic bond 12.5-30.0 Water soluble preparation C1U 3.0-7.5 A water soluble preparation of the brand C1U is an aqueous solution of polymers (38-70% ) with hexamine (5-7%), the rest is water. The water-soluble preparation C1U (TU-6-10-14106-81) does not produce, is stable during storage, does not decompose and is not oxidized in air. Improvement of the processability of the mixture occurs due to the presence of polymers that, by their chemical nature, have good adhesion to inorganic substances, in particular, to silicon carbide grains. The urotropine present in the preparation accelerates the coagulation of the mixture. In addition, during firing, polymers contribute to the hardening of a shard of grinding wheels. Abrasive mixture is prepared as follows. Humidifier and temporary binder are fed to the mixers for abrasive grain and mixed for 1-2 minutes. A ceramic binder is added to the grain so moistened and mixed for 2-3 minutes. The finished mixture is rubbed through a sieve, depending on the grain of the abrasive material. The aqueous polymer solution is a product obtained by the polycondensation of hydroxycarboxylic acids. The test results are shown in the table.

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As can be seen from the table, the optimally freshly formed and dried supplement is a water-soluble product.

C1U is in the range of 3.0-7.5 wt.% The positive effect of the proposed. With a further increase in its invention in comparison with the base quantity, the strength value is fresh: the fifth object, in which

The evolving product is modified-accepted prototype, is that

with a little. Reduced content that durability for freshly formed

a water-soluble drug C1Dizs DETA rises to 3.5 to decrease the strength, for dried ones up to 7.1 times.

Claims (1)

MIXTURE FOR THE PRODUCTION OF AN ABRASIVE TOOL, containing abrasive material, a ceramic bond and a temporary binder, characterized in that, in order to increase the strength of a freshly formed and dried product, it contains a water-soluble preparation C1U in the following ratio of components, wt. %: Abrasive material Ceramic bond • Water-soluble preparation С1.У 66.0-84.5 12.5-30.0 3.0-7.5 SU ,,,. 1144861 1 144861