Precoated sand casting method for large castings

Abstract

The invention relates to a precoated sand casting method for large castings. The large castings are hoisted and subjected to sand removal through the combined work of a hoisting plate, hoisting rings,digging devices, clamping devices, a driving device and knocking devices. According to the precoated sand casting method for the large castings, the problems that when an existing casting device forthe large castings is used for casting the large castings, the cast castings are usually directly hoisted out of a sand mold after being directly locked and fixed, the castings are likely to slide with a locking mechanism in the hoisting process, so that the castings fall off, then the situation of personnel injury is caused, meanwhile, after the castings are hoisted to a designated position, residual sand on the surfaces of the castings needs to be manually removed, due to the fact that the large castings are large in size and complex in shape, the manual sand removing efficiency is low, andthen the casting efficiency of the large castings is low are solved.

Description

technical field [0001] The invention relates to the technical field of casting of large castings, in particular to a method for casting coated sand of large castings. Background technique [0002] Castings are metal shaped objects obtained by various casting methods, that is, the smelted liquid metal is poured into the pre-prepared mold by pouring, injection, suction or other casting methods, and after cooling, it undergoes subsequent processing such as finishing. Finally, the obtained object has a certain shape, size and performance. According to different molding methods, castings can be divided into ordinary sand castings, metal castings, die castings, centrifugal castings, continuous castings, investment castings, ceramic castings, electroslag remelting castings, bimetallic castings, etc. Among them, ordinary sand castings are the most widely used, accounting for about 80% of the total casting output. Especially for large parts and parts with complex shapes, it is usual...

AI Technical Summary

Problems solved by technology

[0004] (1) When the existing large-scale casting casting equipment performs coated sand casting on large-scale castings, it usually directly locks and fixes the castings after casting. After the castings are locked and fixed, they are directly hoisted out of the sand mold. The casting is easy to slip between the locking mechanism and the casting will fall off, causing personal injury;

[0005] (2) When the existing large-scale casting casting equipment performs coated sand casting on large-scale castings, after the castings are hoisted to the designated position, the residual sand on the surface of the castings needs to be manually removed. Due to the large volume and complex shape of large-scale castings, As a result, the efficiency of manual sand removal is low, which in turn makes the casting efficiency of large castings low

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