Lifting appliance for sand cores

Abstract

The invention relates to the technical field of casting core-making technology and equipment and especially relates to a lifting appliance for sand cores. The lifting appliance for sand cores comprises a cross beam, a fixing bracket, an air cylinder, connecting rods and a lifting hook fixing base, wherein the fixing bracket is arranged on the middle of the cross beam; piston rods are arranged on the two ends of the cylinder; the end parts of the piston rods are respectively hinged with one end of the connecting rods; the connecting rods comprise horizontal connecting rods and vertical connecting rods; one end of each horizontal connecting rod is hinged with one piston rod while the other end is hinged with the top of each vertical connecting rod; the side walls of the vertical connecting rods are hinged with the ends of the cross beam; the bottom ends of the vertical connecting rods are connected with the top of the lifting hook fixing base; hooks matched with hoisting holes on the twosides of the sand core are arranged on inner side walls of the lifting hook fixing base; limiting devices which are blocked with the sand core holes on the top of the sand core are arranged on the two sides of the bottom of the cross beam. The hoisting tool for sand cores can be used for conveniently and quickly clamping and positioning the sand core. One operator can conveniently use the liftingappliance for quickly, accurately and conveniently paying out and hoisting the sand core.

Description

technical field [0001] The invention relates to the technical field of foundry core making technology and equipment, in particular to a sand core hanger. Background technique [0002] The foundry sand core lifter is a device for lifting sand cores during the production process. In the process of using the sand core casting process to cast parts, the sand cores on the drying tray need to be hoisted and removed and placed on the core storage trolley. The sand cores are arranged horizontally on the drying tray, with a height of about 1 meter from the ground. Lifting and clamping points are arranged on the sand cores, which are distributed on the operator's side and the operator's opposite side. Because the operator stands on one side and cannot see the sand core clamping point on the opposite side, the operator cannot accurately use the existing spreader to locate and lift the sand core, which not only has low work efficiency but also high labor intensity. [0003] Because of...

AI Technical Summary

Problems solved by technology

Because the operator stands on one side and cannot see the sand core clamping point on the opposite side, the operator cannot accurately use the existing spreader to position and lift the sand core. Not only the work efficiency is low, but also the labor intensity is high.

[0003] Due to the structural characteristics of the sand core itself, if it is not stable during the lifting process, it will easily cause extrusion and collision with the sand core, which will cause casting defects such as blisters and air leakage in the entire casting

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