Billet-extruding central shaft

Abstract

The invention relates to a billet-extruding central shaft which comprises a connecting shaft and an inner hole pattern core, wherein a plurality of sectioning shafts which are integrally formed by the axial mutual hinge joint of rebates and locating pins are arranged between the connecting shaft and the inner hole pattern core. One end of the connecting shaft is provided with an axial connecting tenon which extends into a first slot mortise of a first sectioning shaft, the connecting tenon is hinged with the first slot mortise by the locating pin, the first tenon of the first sectioning shaft extends into a second slot mortise of a second sectioning shaft, and the first tenon is hinged with the second slot mortise by the locating pin, therefore, a plurality of the sectioning shafts are connected to the inner hole pattern core by the tenons and the slot mortises one by one, and the tenon of each sectioning shaft has one offset angle corresponding to the slot mortise thereof. The shaft overcomes the defects of the shaft in the prior art, such as easy bending, deformation and eccentricity under the action of strong thrust force due to the influence of factors such as long suspending raising distance, large self-weight vertical force, and offset caused by water content in concrete and the like; and the extruded mud section has thick and uniform wall and smooth inner holes, therefore, the effect is obvious.

Description

【Technical field】 [0001] The invention belongs to an extruding center shaft installed in a process cylinder at the mud material output end of a vacuum mud refining machine in the electric porcelain wet manufacturing process. 【Background technique】 [0002] In the wet manufacturing process of electric porcelain, vacuum mud refining is a key process, especially the extrusion quality of the hollow porcelain sleeve mud section directly affects the product quality and the service life of the molding equipment. see figure 1 , the vacuum mud refining machine for extruding this kind of mud section needs to add a 1800-2400mm long process cylinder 6. 5 is arranged in the process cylinder 6, one end of which is connected in the screw hole of the end face 42 of the main shaft 4 of the vacuum mud mill, and the other end is connected with the inner hole mold core 7. The existing technology has the following problems: the center shaft of the extrusion body adopts a single long straight s...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned problems in the prior art, the present invention aims to provide a central shaft for extrusion, which has the function of self-aligning under the action of strong extrusion pressure, so that no bending, deformation and eccentricity will occur , which can effectively ensure that the wall thickness of the extruded mud section is uniform and the inner hole is smooth

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