Upper sliding block pressing mechanism of powder forming machine

Abstract

The invention relates to an upper sliding block pressing mechanism of a powder forming machine. The upper sliding block pressing mechanism comprises an upper sliding block ball head screw adjusting mechanism, a hydraulic cushion pressure display mechanism, a protective demoulding mechanism, a synchronous pressing and final pressurizing mechanism and a powder pressing and shifting mechanism. The invention provides the upper sliding block pressing mechanism of the powder forming machine, which has the advantages of reliability in forming products, and stable operation.

Description

technical field [0001] The invention relates to a sliding block pressing mechanism on a powder molding machine, which belongs to the technical field of powder metallurgy. Background technique [0002] The upper slider pressing mechanism is an important part of powder metallurgy, and its quality directly affects the quality of molded products. The existing upper slider pressing mechanism mainly has the following defects: [0003] 1) It cannot reflect the downward pressing force of the upper die, cannot know the change of the pressing force in the mold cavity, and cannot timely adjust the size of the pressing force according to the actual situation of the product, which will affect the molding quality of the product; and when the upper die is stuck When it dies in the female mold, due to the existence of the upper pressing force, it is difficult to reverse the car to make the upper die punch out of the female mold, and it is easy to damage the mechanism and cause losses if it ...

AI Technical Summary

Problems solved by technology

[0003] 1) It cannot reflect the downward pressing force of the upper die, cannot know the change of the pressing force in the mold cavity, and cannot timely adjust the size of the pressing force according to the actual situation of the product, which will affect the molding quality of the product; and when the upper die is stuck When it dies in the female mold, due to the existence of the upper pressing force, it is difficult to reverse the car to make the upper die punch out of the female mold, and it is easy to damage the mechanism and cause losses if it is forced out;

[0004] 2) The traditional upper slider ball head screw adjustment mechanism and the upper slider cylinder plate are often connected by fasteners such as threads. During the connection process, it is easy to cause axial deviation between the two, resulting in the mechanism not working properly during operation. Unstable phenomenon occurs in the process, which affects the quality of product molding and damages the mechanism;

[0005] 3) During the downward movement of the upper die, it is directly driven by the piston of the upper cylinder. Since there is no guidance of the guiding mechanism, it is easy to tilt during the movement process, and because of the tilt, it is easy to make the piston of the upper cylinder rotate and drive the related parts to move together. The accumulation of this kind of motion can easily lead to the collision between the various parts of the entire pressing mechanism, which can easily lead to damage to the mechanism;

[0006] 4) The traditional synchronous pressing mechanism is placed on the side of the mechanism and controlled by the pressing cam. The upper and lower pressing curves are only approximate, which will have a certain impact on the molding of some products;

[0007] 5) For products with upper and outer steps, in order to form products with better compactness, the powder loading requirements are more in the middle and less on both sides. The traditional method is to set up a powder escape groove on the female mold, and it needs to be adjusted through repeated tests. The process is very cumbersome and not precise enough, which greatly increases the production cost, and the quality of the pressed products cannot be effectively guaranteed, and the consistency is poor

Images