Preheating block and preheating column of direct heating type cubic press and manufacturing method of preheating column

Abstract

The direct heating type cubic press preheating block comprises a preheating column, the periphery of the preheating column is wrapped with a pressure transmitting part, the upper end and the lower end of the preheating column are each provided with a conductive plug, and the pressure transmitting part and the conductive plugs form a square sealing shell; the preheating column is prepared by crushing and mixing graphite and dolomite according to a certain proportion, granulating dry powder and performing compression molding, the graphite accounts for 2%-20% by mass, and the dolomite accounts for 80%-98% by mass; the conductive preheating column is used for replacing a graphite column, a magnesium oxide lining and a heating element, so that the distance between the heating element and the pressure maintaining anvil is effectively shortened, and the temperature difference between the heating anvil and the pressure maintaining anvil is reduced; the preheating column is formed by pressing the graphite and the dolomite according to the proportion, the resistance of the preheating column can be within a proper range by adjusting the proportion of the graphite and the dolomite, heat generated by heating current is mainly concentrated on the preheating column, and excessive heating of the heating holding-up hammer is avoided.

Description

technical field [0001] The invention relates to the technical field of a top hammer preheating device for a six-sided top press, in particular to a direct heating type six-sided top press preheating block, a preheating column and a method for manufacturing the preheating column. Background technique [0002] At present, the heating method of the top hammer preheating block of the six-sided top press is mostly indirect heating. A pyrophyllite ring is arranged between the block and the conductive plug, a heating element is attached to the dolomite outer lining and the inner side of the conductive plug, and the inside of the heating element is a graphite column wrapped by a magnesium oxide lining. The structure of the preheating block is complex, the cost is high, and the graphite column is seriously wasted; when working, there are two heating anvils acting on the conductive plug, and after the current is passed, it will generate a part of heat, and due to the existence of the ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to solve the above problems and provide a direct heating six-sided top press preheating block. Through structural optimization, the problem of waste of graphite columns is solved, the cost of the preheating block is reduced, the assembly is convenient, the electric energy is saved, and the The temperature difference between the heating hammer and the pressure holding hammer improves the subsequent synthesis quality, and the technical solution adopted is:

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