Die pressing system for pressing rare earth materials

Abstract

The invention relates to the technical field of die pressing system structures, in particular to a die pressing system for pressing rare earth materials. The die pressing system comprises an upper die, a lower die and an oil supply system, an oil outlet of an oil pump is communicated with an upper die upper cylinder through an upper die reversing valve, an upper die lower cylinder is communicated with an oil tank through the upper die reversing valve, the upper die lower cylinder is communicated with the upper die upper cylinder through a rapid valve, the upper die upper cylinder is communicated with the oil tank through a pressure retaining valve A, the oil outlet of the oil pump is communicated with a lower die upper cylinder through a lower die reversing valve, a lower die lower cylinder is communicated with the oil tank through the lower die reversing valve, the oil outlet of the oil pump is communicated with the lower die lower cylinder through a pressure retaining valve B, and the lower die upper cylinder is communicated with the upper die lower cylinder through a pressure retaining valve D. According to the die pressing system for pressing the rare earth materials, the rare earth materials are subjected to die pressing through the upper die and the lower die, demolding is performed after retaining and progressively reducing of pressure, the phenomenon that the rare earth materials are cracked due to suddenly reduced pressure can be prevented after forming, the one-time finished product rate of products is greatly improved, and production costs are saved.

Description

technical field [0001] The invention relates to the technical field of molding machine structures, in particular to a molding system for pressing rare earth materials. Background technique [0002] The most important equipment for powder metallurgy processing such as rare earth materials is a molding system. The existing molding system is mainly composed of an upper mold, a lower mold, and a driving device for driving the movement of the upper mold and the lower mold. In the existing molding system, after the upper mold and the lower mold press the rare earth material, the upper mold is separated upward rapidly, and the pressure on the rare earth material is rapidly reduced to zero. Due to the stress, the formed rare earth material may be broken, so It is necessary to improve the structure of the existing molding system to increase the one-time yield of products. Contents of the invention [0003] The object of the present invention is to provide a molding system for pres...

AI Technical Summary

Problems solved by technology

In the existing molding system, after the upper mold and the lower mold press the rare earth material, the upper mold is separated upward rapidly, and the pressure on the rare earth material is rapidly reduced to zero. Due to the stress, the formed rare earth material may be broken, so It is necessary to improve the structure of the existing molding system to improve the one-time yield of products

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