CN103736910A - Casting method - Google Patents

Abstract

The invention discloses a casting method. The casting method comprises the following steps: filling a resin and a curing agent in precoated sand, and injecting the precoated sand filled with the resin and the curing agent as a raw material in a casting mould forming mould; integrating the casting core and a shell mould into a whole in a primary forming and solidifying manner, and preparing a precoated sand casting mould the two ends of which are opened, wherein the precoated sand casting mould can combine the core and periphery surrounding side walls into a whole; gluing and fixing a casting mould end cover on the opening of the two ends of the casting mould, carrying out casting heating on the mould, enabling the mould to naturally cake and form by roasting uat the temperature of more than 200 DEG C because the refractoriness of the precoated sand is high and can exceed more than 1500 DEG C. The casting method provided by the invention has the advantages that a model is burned out when a foam mould casted by a disappearing mould meets the temperature of more than 60 DEG C, the precoated sand is not directly utilized to fill holes of the model, the precoated sand filled with the resin and the curing agent is utilized to solve the problem that the precoated sand is caked and formed at a normal temperature, and the pouring foundry is easy to clean.

Description

A kind of casting method

technical field:

The present invention relates to a kind of casting method, relate in particular to a kind of casting method of using precoated sand to add resin and curing agent to solve aperture duck eye Sintering Problem in casting.

 

background technology:

At present, in casting industry, especially in lost foam casting, usually encounter after moulding out, at the less Kong Hedong of size, occur the phenomenon of sand fritting, the reason that produces this problem is: common moulding sand refractoriness used is lower, be subject to after the encirclement of high temperature liquid iron, part sand melted and combine, form " sintering " phenomenon of often saying in casting.Occur after this problem, foundry goods is difficult to cleaning and does not sometimes even clear up, thereby causes scrapping of foundry goods.

Therefore, the necessary deficiency of prior art being improved to solve prior art.

 

summary of the invention:

The invention provides a kind of casting method, it can effectively solve aperture duck eye Sintering Problem in existing casting.

The present invention adopts following technical scheme: a kind of casting method, it comprises the steps

Step 1: will add resin and curing agent in precoated sand, and the above-mentioned precoated sand that is added with resin and curing agent is injected in moldings formed therefrom mould as raw material;

Step 2: integrated casting core used and the one-shot forming of shell mould with solidify in one, make core and surrounding and surround the open at both ends precoated sand mold that sidewall becomes one, mold end cap mucilage binding is fixed on to mold open at both ends place;

Step 3: to the heating of casting of above-mentioned mould, because the refractoriness of precoated sand is higher, exceed degree more than 1500, its moulding of could naturally luming after the temperature barbecue of degree more than 200, but encountering higher than the temperature of 60 degree, the bubbles model of lost foam casting will burn out model, so can not directly be used for clogging with precoated sand the hole of model, and solve the problem of the moulding of luming under precoated sand normal temperature by the precoated sand that is added with resin and curing agent, and also easily cleaning of cast foundry goods out.

The present invention has following beneficial effect: in casting method of the present invention, by using precoated sand to add resin and curing agent, can effectively solve the problem of moulding of luming under existing precoated sand normal temperature, and then avoid the generation of sintering phenomenon.

 

the specific embodiment:

Introduce the specific embodiment of the invention below.

Casting method of the present invention comprises the steps:

Step 1: will add resin and curing agent in precoated sand, and the above-mentioned precoated sand that is added with resin and curing agent is injected in moldings formed therefrom mould as raw material;

Step 2: integrated casting core used and the one-shot forming of shell mould with solidify in one, make core and surrounding and surround the open at both ends precoated sand mold that sidewall becomes one, mold end cap mucilage binding is fixed on to mold open at both ends place;

Step 3: to the heating of casting of above-mentioned mould, because the refractoriness of precoated sand is higher, exceed degree more than 1500, its moulding of could naturally luming after the temperature barbecue of degree more than 200, but encountering higher than the temperature of 60 degree, the bubbles model of lost foam casting will burn out model, so can not directly be used for clogging with precoated sand the hole of model, and solve the problem of the moulding of luming under precoated sand normal temperature by the precoated sand that is added with resin and curing agent, and also easily cleaning of cast foundry goods out.

The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make under the premise without departing from the principles of the invention some improvement, and these improve and also should be considered as protection scope of the present invention.

Claims (1)

1. a casting method, is characterized in that: described casting method comprises the steps

Step 1: will add resin and curing agent in precoated sand, and the above-mentioned precoated sand that is added with resin and curing agent is injected in moldings formed therefrom mould as raw material;

Step 2: integrated casting core used and the one-shot forming of shell mould with solidify in one, make core and surrounding and surround the open at both ends precoated sand mold that sidewall becomes one, mold end cap mucilage binding is fixed on to mold open at both ends place;

Step 3: to the heating of casting of above-mentioned mould, because the refractoriness of precoated sand is higher, exceed degree more than 1500, its moulding of could naturally luming after the temperature barbecue of degree more than 200, but encountering higher than the temperature of 60 degree, the bubbles model of lost foam casting will burn out model, so can not directly be used for clogging with precoated sand the hole of model, and solve the problem of the moulding of luming under precoated sand normal temperature by the precoated sand that is added with resin and curing agent, and also easily cleaning of cast foundry goods out.