Ultrasonic device for powder compression molding

Abstract

The invention relates to an ultrasonic device for powder compression molding. The ultrasonic device for the powder compression molding comprises a die holder, a concave die arranged on the die holderand a convex die arranged opposite to the concave die, the convex die is matched with the concave die, and the convex die and the concave die form a cavity chamber for powder compression together; theultrasonic device for the powder compression molding is characterized in that at least one supersonic vibration generator is arranged in the die holder, vibration output parts of the supersonic vibration generators are arranged facing the concave die, wherein at least one impacting piece is arranged between the concave die and the vibration output parts of the supersonic vibration generators, andthe supersonic vibration generators can drive the impacting pieces to impact the concave die. According to the ultrasonic device for the powder compression molding, the supersonic vibration generators drive the impacting pieces to impact the concave die, and thus the vibration, generated in the working process of the ultrasonic device, to powder materials is high in energy and high in frequency;and thus obtained products after being subjected to the compression molding by the ultrasonic device are high in compactness and have good mechanical properties.

Description

Technical field [0001] The invention belongs to the technical field related to powder compaction, and particularly relates to an ultrasonic device for powder compaction molding. Background technique [0002] Powder compression molding is used to make loose powder into semi-finished or finished products with predetermined geometric shapes, sizes, density and strength. [0003] Among them, the ceramic powder molding technology is made by mixing zirconia powder, zirconia powder and molding agent as raw materials through dry pressing and sintering processes. This process mainly produces lightweight, high-rigidity flat-shaped ceramics Products with high production efficiency, suitable for mass production, low cost, high material utilization rate, and good shear resistance. [0004] At present, ceramics is pressed into a shape by static pressure of a press and a mold. The powder is pressed into a desired shape under a pressure of 15-600MPa. Because the material of zirconia is hard and bri...

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Problems solved by technology

[0006] However, when the above-mentioned powder compacting device is working, due to the low energy generated by the membrane vibration, the frequency is small, and the transmission range is limited, it can only cause a slight movement of the material close to the membrane surface, which is not enough to make the entire component material dense, which will affect The mechanical properties of the product after compression molding; moreover, this effect is gone after pressing, which does not solve the problem of disordered powder arrangement during the pressing process

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