Lost foam casting forming technology of reciprocating grate plate for waste incineration

Abstract

The invention discloses a lost foam casting forming technology of a reciprocating grate plate for waste incineration. The lost foam casting forming technology is characterized by comprising the steps of 1) manufacturing of a foam pattern; 2) drying and stabilization of the foam pattern: placing the foam pattern obtained through foam forming in a drying chamber to be subjected to drying treatment, controlling the temperature to be 40 DEG C to 60 DEG C, and enabling the moisture content of the dried pattern to be lower than 1%; 3) coating and drying of the foam pattern; 4) modelling: laying a layer of bottom sand at the bottom of a sand box, after vibration, putting the foam pattern in the sand box, then, adding sand in a rain falling sand adding manner, and carrying out vibration while sand adding during the sand adding process; 5) pouring; and 6) cooling and cleaning: after box overturning, carrying out shakeout cleaning on a grate plate casting, and repeatedly utilizing separated dry sand after treatment. The lost foam casting forming technology has the advantages that the grate plate has few casting defects, the surface quality is good, the rate of finished products is high, the technology has good economic benefits, and the like.

Description

Technical field [0001] The invention relates to the technical field of mold manufacturing, in particular to a lost foam casting molding process of a reciprocating grate piece for garbage incineration. Background technique [0002] Lost foam casting is also called full mold casting. In its production process, the white mold pattern that has been formed by foaming and is exactly the same as the casting structure is buried in the molding sand, and the shape is vibrated by a three-dimensional vibrating table, and then placed in a negative pressure state. The molten metal is poured into the flask to make the white mold polymer material undergo a series of physical and chemical reactions at a high temperature and finally extracted by the vacuum system, so that the molten metal solution replaces the original white mold solid shape to complete the corresponding molding process. Compared with traditional sand casting, lost foam casting has been applied to more and more manufacturing field...

AI Technical Summary

Problems solved by technology

[0004] (1) The mold wall size of each part is uneven, and there are thick-walled parts, which are prone to common casting defects such as shrinkage cavity and shrinkage porosity;

[0005] (2) The grate part is relatively thin, and its main size is between 3-10mm. In the case of poor fluidity of the alloy, it is prone to cold shut and insufficient pouring.

Chinese patent literature discloses a manufacturing method of a heat-resistant, wear-resistant and corrosion-resistant large-scale mechanical reciprocating furnace grate. The molded castings have low precision, low service life, high scrap rate, and serious casting defects

Although the surface precision is improved by the investment casting method, the process is complicated, and the production efficiency is low and the production cost is high

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