Punching cylinder for extruding machine

Abstract

The invention discloses a punching cylinder for an extruding machine. The punching cylinder comprises a main cylinder block, a plunger and a piston assembly. The plunger is fixed into the main cylinder block and provided with an inner cavity. The piston assembly comprises a piston rod, a piston and a punching cylinder front cover fixed to the open end of the inner cavity. The piston rod penetrates through the punching cylinder front cover, the piston is installed at the end, located in the inner cavity, of the piston rod, and the other end of the piston rod is connected with a punching beam through a connecting piece. According to the punching cylinder for the extruding machine, the plunger serves as a cylinder body of the punching cylinder, and overall machining cost is greatly reduced; after the plunger serves as the punching cylinder body and an inner hole of the punching cylinder is expanded to meet actual use requirements, the plunger still has enough wall thickness; finally, after a channel is machined in the inner wall of the plunger, pipelines do not need to be distributed in the plunger, device pipeline layout is more convenient, safety is high, and maintenance is convenient.

Description

technical field [0001] The invention belongs to the extrusion machine manufacturing technology, in particular to a piercing cylinder used for the extrusion machine. Background technique [0002] The traditional piercing cylinder used in extruders is machined and installed in the inner cavity of the plunger. This perforated cylinder assembly method has the following disadvantages in specific applications: [0003] 1) The cost of separately forging a perforated cylinder is relatively high; [0004] 2) In order to ensure the strength, it is required that the wall thickness of the plunger and the piercing cylinder cannot be too thin, which will limit the diameter of the inner hole of the piercing cylinder and affect the maximum piercing force parameter; [0005] 3) When it comes to the piping of the perforated cylinder, the piping of the plug cavity needs to be arranged inside the plunger, the space is narrow, and the inner wall needs to be processed with a process groove. C...

AI Technical Summary

Problems solved by technology

[0003] 1) The cost of separately forging and processing a perforated cylinder is relatively high;

[0004] 2) In order to ensure the strength, it is required that the wall thickness of the plunger and the piercing cylinder should not be too thin, which will limit the diameter of the inner hole of the piercing cylinder and affect the maximum piercing force parameter;

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