What is the process of the sand casting?

The sand casting: for single pieces, small batches and large castings with complex shapes that are difficult to use with casting machines. Mechanical sand casting: for small and medium sized castings in mass production.

• What are the first steps in the production of sand casting?

• What are the steps in the second stage of sand casting casting production?

• What are the final steps of sand casting production?

What are the first steps in the production of sand castings?

The basic process of traditional sand casting has the following steps: sand mixing, mould making, core making, moulding, pouring, sand falling, grinding and processing, inspection and other steps

1, sand mixing stage, the preparation of sand and core sand for moulding, generally use the sand mixer into the old figure and the appropriate amount of clay on the mixing.

2, the mould-making stage, according to the parts of the drawing to produce moulds and core boxes, generally single pieces can be used for wooden moulds, mass production can be made of plastic moulds or metal moulds, large quantities of castings can be made of type plate. Nowadays, moulds are basically made by engraving machines, so the production cycle is greatly shortened, and mould making generally takes from 2 to 10 days.

3, casting (core making) stage: including the casting (with sand to form the cavity of the casting), core making (to form the internal shape of the casting), with the mould (the core into the cavity, the upper and lower sand box together). Moulding is a key part of the casting process.

What are the steps in the second stage of sand casting casting production?

1, melting stage: according to the required metal into a good chemical composition, choose a suitable melting furnace melting alloy materials, the formation of qualified liquid metal liquid (including composition qualified, temperature qualified). Melting generally uses cupola or electric furnace (due to environmental requirements, cupola is now basically outlawed and electric furnace is basically used).

2、Pouring stage: the molten iron from the electric furnace is injected into the finished type with the iron ladle. Pouring iron needs to pay attention to the speed of pouring, so that the iron is filled with the entire cavity. In addition, the pouring of iron is dangerous and requires attention to safety!

What are the final steps of sand casting production?

1、Cleaning up stage: After pouring, wait for the molten metal to solidify, take a hammer to remove the sprue and shake off the sand of the casting, then use a sand blasting machine for sand blasting, so that the surface of the casting will look very clean! Not strict requirements for the casting blank after inspection can basically be factory.

2, casting processing, for some special requirements of the casting or some casting can not meet the requirements of the casting, may need simple processing. Generally use grinding wheels or grinders for processing and polishing to remove burrs and make the castings more polished.

3, casting inspection, casting inspection is generally in the process of cleaning or processing stage, unqualified generally have been found to pick out.

FHZL is also the first Chinese enterprise to export the sand 3D printers to the overseas market. It can also meet customers’ demands on different casting process by simply choosing the appropriate parameters.