Screw type rotor molding machine

Abstract

A screw type rotor molding machine comprises a workbench, an outer mold, a rotor core rod and a driving source; the outer mold is arranged on the workbench and is provided with a model sand adding endopening; the rotor core rod is arranged on the workbench in a mode of lifting from bottom to top, and the upper end of the rotor core rod extends into the outer mold; the outer side of the rotor corerod and the inner side of the outer mold define a rotor cavity. The screw type rotor molding machine is characterized in that the driving source is an air cylinder, the air cylinder is provided witha piston rod extending upwards, and the rotor core rod is rotationally connected to the piston rod, and rotates up and down with the piston rod. Compared with the prior art, the screw type rotor molding machine has the advantages that the air cylinder is used to drive the rotor core rod to move downwards, and the rotor core rod rotates naturally along a spiral inner cavity of a sand core, so thatthe rotor core rod and the solidified sand core are not clamped, the rotating speed can be self-regulated at any time, and the integrity and the quality of the sand core are guaranteed.

Description

Technical field [0001] The invention relates to a screw sand molding machine, which can be applied to screw model making. Background technique [0002] The screw compressor rotor is the core component of the screw compressor and the screw pump, and the design and processing of the rotor tooth profile is related to the reliability, efficiency and noise of the machine body. At present, the widely used tooth profile processing methods include disc milling cutter milling processing method, generating method rolling pin and grinding pin forming method. The above three methods have low production efficiency, high energy consumption and product quality organization. Insufficiency of non-uniformity, in addition, large-scale equipment is required, resulting in higher costs. Relevant literature can refer to "Tool Technology" October 2004, "Processing of Screw Compressor Rotor" by Chen Liming; "Fluid Machinery" Vol28, No. 7, 2000, "Screw Compressor Rotor Grinding and Shaping" by Wu Xianjun...

AI Technical Summary

Problems solved by technology

[0005] Document CN102909321A, although a new idea has been realized to make the sand core of the screw rotor, but in the actual application demoulding process, the demoulding speed of the screw compressor rotor mandrel is controlled by the motor, and it is easy to get stuck if the speed is too high , so as to destroy the formed sand core. In addition, after the sand core is taken out, it needs to be placed in the sand box for landfill, otherwise the sand core is easy to explode and be scrapped, that is, the sand core cannot be directly used for pouring

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