CN103909227A - Processing method of common casting pieces - Google Patents

Abstract

The invention discloses a processing method of common casting pieces. The processing method comprises the following steps: coating and hanging refractory paint on a casting-piece melting mold, then covering fine sand, and putting the casting-piece melting mold in ammonium-chloride aqueous solution for hardening; soaking a shell in hot water, automatically melting a wax mold, then separating from the shell and obtaining a cavity consistent to a casting piece in shape; putting the shell in a heating furnace for heating; casting metal-melting liquid in the shell of the casting piece and injecting and forming; after the casting piece is solidified and cooled, carrying out clearing and inspection on the casting piece. The processing method disclosed by the invention has the advantages that the processing process is safe and environmentally friendly, the efficiency is high, the surface of the produced casting piece is bright and clean, the size is accurate and the purpose of small amount of cutting or no cutting can be achieved.

Description

A kind of processing method of common foundry goods

technical field

The present invention relates to a kind of processing method of common foundry goods.

Background technology

Foundry goods is the metal forming object obtaining by various casting methods, the liquid metal of having smelted, inject preprepared casting mold with cast, injection, suction or other casting method, cooling after through etc., what obtain has definite shape, an object of size and performance

Foundry goods has multiple sorting technique: by the difference of its metal material used, be divided into steel-casting, ironcasting, copper casting, aluminum casting, casting magnesium part, casting zinc part, casting titanium part etc.And every class foundry goods can further be divided into different kinds by its chemical composition or metallographic structure.As ironcasting can be divided into gray iron casting, nodular iron casting, pieces of vermicular cast iron, mitis metal, alloy iron casting etc.; Press the difference of casting mold forming method, foundry goods can be divided into common sand-cast, Metal mould casting, die casting, centrifugal casting, continuous pouring part, investment-casting, ceramic mould casting, electroslag remelting foundry goods, composite casting etc.Wherein with common sand-cast application at most, account for 80% of whole casting outputs.And mostly the non-ferrous castings such as aluminium, magnesium, zinc are die casting.

Summary of the invention

The object of the invention is to provide a kind of processing method of common foundry goods, this processing technology safety, environmental protection, and efficiency is high; The foundry goods of producing is sturdy and durable.

The solution of the present invention is as follows: a kind of processing method of common foundry goods, and procedure of processing is as follows:

1., on foundry goods fusible pattern, be coated with fireproof coating, then cover the fine sand that 1-2mm is thick, then put it in the aqueous ammonium chloride solution of 1:8 proportioning and harden; Repeat to hang coating, stucco and hardening process 2-4 time, until form the shell that 4～6mm is thick;

2., above-mentioned shell is immersed in the hot water of 80～90 DEG C, wax-pattern is deviate from after melting voluntarily from shell, obtains the die cavity consistent with foundry goods shape;

3., above-mentioned shell is put into heating furnace, heating at 400～600 DEG C, to remove the impurity and the moisture content that produce in shell;

4., molten metal bath is poured in casting shell molds, injection moulding, implantation temperature is 500-600 DEG C;

5., casting solidification cooling after, and it is cleared up and is checked.

Further, described fireproof coating is made up of waterglass and the silica flour solution of 1:1 proportioning.

Processing technology safety of the present invention, environmental protection, efficiency is high, and the cast(ing) surface produced is bright and clean, size is accurate, can reach few cutting or the object without cutting.

Detailed description of the invention

A processing method for common foundry goods, procedure of processing is as follows:

1., on foundry goods fusible pattern, be coated with fireproof coating, then cover the fine sand that 1-2mm is thick, then put it in the aqueous ammonium chloride solution of 1:8 proportioning and harden; Repeat to hang coating, stucco and hardening process 2-4 time, until form the shell that 4～6mm is thick;

2., above-mentioned shell is immersed in the hot water of 80～90 DEG C, wax-pattern is deviate from after melting voluntarily from shell, obtains the die cavity consistent with foundry goods shape;

3., above-mentioned shell is put into heating furnace, heating at 400～600 DEG C, to remove the impurity and the moisture content that produce in shell;

4., molten metal bath is poured in casting shell molds, injection moulding, implantation temperature is 500-600 DEG C;

5., casting solidification cooling after, and it is cleared up and is checked.

Described fireproof coating is made up of waterglass and the silica flour solution of 1:1 proportioning.

Although above the specific embodiment of the present invention has been given to describe in detail and explanation; but what should indicate is; we can carry out various equivalences to above-mentioned embodiment according to conception of the present invention and change and amendment; when its function producing does not exceed spiritual that description contains yet, all should be within protection scope of the present invention.

Claims (2)

1. a processing method for common foundry goods, is characterized in that, procedure of processing is as follows:

1., on foundry goods fusible pattern, be coated with fireproof coating, then cover the fine sand that 1-2mm is thick, then put it in the aqueous ammonium chloride solution of 1:8 proportioning and harden; Repeat to hang coating, stucco and hardening process 2-4 time, until form the shell that 4～6mm is thick;

2., above-mentioned shell is immersed in the hot water of 80～90 DEG C, wax-pattern is deviate from after melting voluntarily from shell, obtains the die cavity consistent with foundry goods shape;

3., above-mentioned shell is put into heating furnace, heating at 400～600 DEG C, to remove the impurity and the moisture content that produce in shell;

4., molten metal bath is poured in casting shell molds, injection moulding, implantation temperature is 500-600 DEG C;

5., casting solidification cooling after, and it is cleared up and is checked.

2. the processing method of a kind of common foundry goods according to claim 1, the fireproof coating described in it is characterized in that is made up of waterglass and the silica flour solution of 1:1 proportioning.