A kind of dry bag type powder auxiliary molding method and device

Abstract

The invention relates to the technical field of powder forming, in particular to a dry bag type powder auxiliary forming method and device. By means of the dry bag type powder auxiliary forming method and device, few workers are needed, materials are not wasted, and the technology steps are reduced. Liquid is injected into a pressurizing cavity and a high-pressure cavity through a liquid filling port, a preformed to-be-pressed blank is placed on a rubber pad fixed with an ejector rod or a soft film sleeve in the high-pressure cavity, the ejector rod moves till the rubber pad makes contact with the soft film sleeve, the high-pressure cavity is sealed, a pressure bearing sliding block moves to one end of the ejector rod so as to bear the ejector rod, a pressure cylinder exerts pressure on the interior of the high-pressure cavity through the pressurizing cavity, and after pressure maintaining is conducted for a certain time, the pressure cylinder, the pressure bearing sliding block and the ejector rod reset, and the pressed blank with the improved density and uniformity is taken out. The dry bag type powder auxiliary forming method and device are mainly applied to the aspect of powder forming.

Description

technical field [0001] The invention relates to the technical field of powder molding, and more specifically relates to a dry bag powder auxiliary molding method and device. Background technique [0002] At present, in rare earth permanent magnetic materials, ceramics, and other fields involving powder molding, products other than cylinders, rings, and regular polygons, such as products with insufficient molding density or direct molding defects, are generally packaged in plastic film. Use cold isostatic pressing method to improve density and uniformity. Cylinders, rings, and regular polygons are usually directly formed by dry bag isostatic pressing, while squares and tiles are directly formed by dry bags, the shape is difficult to guarantee, and the processing allowance is huge, resulting in waste of materials and Increased processing costs. Due to operations such as plastic film packaging, cold isostatic pressing, removal of plastic seals, and loading of sintering boats,...

AI Technical Summary

Problems solved by technology

Cylinders, rings, and regular polygons are usually directly formed by dry bag isostatic pressing, while squares and tiles are directly formed by dry bags, the shape is difficult to guarantee, and the processing allowance is huge, resulting in waste of materials and Increased processing costs

Due to operations such as plastic film packaging, cold isostatic pressing, removal of plastic seals, loading of sintering boats, etc., it is difficult to realize automation, resulting in a large number of operators at present, which puts pressure on cost and quality management

Oily plastic bags are difficult to recycle, causing pollution

Images