Sand core automatic demoulding mechanism and demoulding method for screw compressor rotor

Abstract

The invention relates to the field of casting and provides a sand core automatic demoulding mechanism and a demoulding method for a screw compressor rotor, wherein the sand core automatic demoulding mechanism has an ingenious design, sufficiently utilizes the characteristic of a screw thread on the surface of the rotor to carry out demoulding and has a high production efficiency and a high quality. The invention solves the technical problems that in the prior art, the production efficiency is low, the labor intensity of workers is high, a sand core has a poor quality, the quality of the screw compressor rotor cannot be ensured and the like. The sand core automatic demoulding mechanism comprises a bracket, a left die and a right die, wherein the left die and the right die can relatively slide on the bracket along the horizontal direction; after the left and right dies are abutted, a synthetic sand core cavity is surrounded; a screw compressor rotor core rod is arranged at the middle part of the sand core cavity; and the screw compressor rotor core rod is screwed on the bracket and can be driven by a driving mechanism to rotationally enter and exit the synthetic sand core cavity. In the demoulding process, firstly, resin sand is placed into the sand core cavity to be tamped and the upper surface of the resin sand is scraped by a sand scraper; the resin sand is cured by a heating rod; and then the driving mechanism is started to screw out the screw compressor rotor core rod; and finally, the left and right dies are driven by the cylinder to slide outward to be demoulded.

Description

technical field [0001] The invention relates to the field of casting, in particular to an automatic sand core demoulding mechanism and a demoulding method for a screw compressor rotor with high production efficiency and good quality. Background technique [0002] The rotors of screw compressors generally include male rotors and female rotors. In the prior art, the sand cores of the male and female rotors are usually made of resin sand by hand. Not only is the production efficiency low, the labor intensity of the workers is high, and the quality of the sand cores is poor. As a result, the quality of the screw compressor rotor cannot be guaranteed. [0003] Chinese patent discloses a core box movable block automatic demoulding device (CN202192230U), which includes a static core box and a movable core box. There are a pair of fixed rollers, which are combined into a movable block assembly, and the movable block assembly is embedded in the moving core box through the guide rail...

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly provides an automatic sand core demoulding mechanism and a demoulding method for screw compressor rotors with ingenious conception, making full use of the thread characteristics of the rotor surface, high production efficiency and good quality, and solving the problems in the prior art. There are technical problems such as low production efficiency caused by manual production, high labor intensity, poor sand core quality, and unguaranteed quality of screw compressor rotors.

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