Special adjustable mold frame pneumatic core rod mechanism for full-automatic dry powder press

Abstract

The invention discloses a special adjustable mold frame pneumatic core rod mechanism for a full-automatic dry powder press. According to the technical scheme, a cylinder body is fixed between two lower guide columns, a base plate is fixed in a lower connecting plate through screws, the cylinder body is fixed on the lower connecting plate through screws, two quick-inserting connectors are installedon the cylinder body, a gland is used for allowing an O-shaped ring and a step seal to be installed, moreover, the O-shaped ring is used for sealing an upper cavity of the cylinder body, the step seal is used for sealing a piston rod, a gasket is fixed on the cylinder body through screws, the piston rod and a core rod connecting rod are connected through a half sheath, a core rod gland is fixedlyconnected with the cylinder body through screws, and the core rod gland tightly presses an adjusting nut. Through the change of the gas inlet pressure of the core rod air cylinder, the demolding force of the core rod and contained powder ejection force can be conveniently adjusted; an anti-rotation device can be additionally arranged so that the core rod can be kept fixed in the circumferential direction, and the function of protecting the core rod is achieved; and a core rod height adjusting device is additionally arranged, so that mold frame adaptation types are increased, and design difficulty and installation difficulty of a mold and a connecting part are simplified.

Description

Technical field: [0001] The invention relates to a special adjustable mold base pneumatic core rod mechanism for a fully automatic dry powder press. Background technique: [0002] The floating core rod mechanism used in the traditional powder metallurgy formwork is a separate cylinder installed on the lower connecting plate. The piston rod of the cylinder is processed with internal or external threads, and the core rod is directly fixed on the piston rod with the thread. After the cylinder is inflated Corresponding up and down movement of the piston realizes the functions of powder loading, demoulding and vibration powder loading after the core rod. This structure can realize the main function of the core rod, but there are certain disadvantages in the actual installation and use process: [0003] 1. The verticality of the core rod installation and the concentricity with the center of the die depend to a large extent on the machining accuracy of the piston rod thread, becau...

AI Technical Summary

Problems solved by technology

[0003] 1. The verticality of the core rod installation and the concentricity with the center of the die depend to a large extent on the machining accuracy of the piston rod thread, because the matching accuracy of the core rod and the lower punch requires a unilateral clearance between 0.075-0.01mm In this case, there is a high requirement for the machining accuracy of the thread. If the accuracy cannot meet the requirements, the core rod may be unable to be installed or easily damaged, and it will also affect the stability of the product;

[0004] 2. The core rod cylinder has no guide, and the piston rod may shake during the up and down movement of the piston rod, which will affect the service life of the core rod;

[0005] 3. The height of the core rod cannot be directly adjusted, because the opening error of the formwork itself and the accumulated errors of the mold and the connecting parts cannot guarantee that the theoretical height of the core rod can completely match the actual height, which requires the core rod to be installed during the installation process. It can realize the adjustment of the height and position of the core rod. The traditional floating core rod device needs to add an additional set of core rod adjustment device, which increases the complexity of the design of the mold and connecting parts, and increases the difficulty for customers to use;

[0006] 4. The installation method of screw rotation is adopted. The installation of the core rod of the opposite sex must be before the installation of the die, which increases the restrictions on the installation of the mold; 5. During the long-term vibration of the threaded connection, it is easy to cause loose connection , the height of the core rod will fluctuate, causing damage to the mold or unstable powder loading, resulting in quality deviation of the product

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