What is the casting method for castings made from ceramic slurry?

A casting method for producing castings by making molds from ceramic slurry. The ceramic slurry is made of ethyl silicate hydrolysate mixed with fine refractory sand with purer texture and high thermal stability, such as fused silica, zircon, precision casting corundum, etc.

In order to make the ceramic slurry gelatin in a short time, calcium hydroxide or magnesium oxide is often added as a catalyst. Because the composition of the refractory material used and its appearance are similar to ceramics, it is called ceramic type.

Ceramic mold casting is a new process developed on the basis of ordinary sand casting. There are two types of ceramic types:

The ceramic type is all made of ceramic slurry. The production process is to fix the pattern on the pattern plate first, coat the sand box, precision casting, and then pour the adjusted ceramic slurry into the sand box, wait for the gel to harden and then start the mold, and then become a casting mold after high temperature roasting.

A bushing is used to create a mold by pouring a ceramic slurry in the gap between the bushing and the pattern. Bushings can be used in sand or metal. Pouring the ceramic shell with a bushing can save a lot of ceramic slurry, which is more used in production.

The surface roughness of ceramic castings can reach Ra10 microns, and the dimensional accuracy is as high as 3 5 grades, which can achieve the purpose of less cutting.

The production cycle of ceramic mold casting is short and the metal utilization rate is high. The maximum casting can reach more than ten tons, which is mainly used for casting large thick-walled precision castings and casting single-piece small batches of stamping dies, precision casting forging dies, plastic molds, metal molds, die-casting molds, glass molds and other molds.

The service life of ceramic mold casting molds is comparable to that of molds made by mechanical processing methods, while the manufacturing cost is lower than that of molds made by mechanical processing methods.

Special casting casting, a method of shell casting.

Steel mold - hot die casting paste - 1000 degrees wax removal - 1700 degrees high temperature sintering.

The process steps of casting ceramics are wrongly crystallized cold treatment.

To practice mud, take porcelain stone from the mining area, first manually crush it with an iron hammer to an egg-sized block, and then use water to beat it into powder, wash it, remove impurities, and make brick-like mud blocks after precipitation; Pull the blank, throw the mud ball in the center of the turntable of the roller car, and pull out the general appearance of the blank body with the flexion and extension of the hand.

Printing blank, the shape of the impression is rotated according to the shape arc of the blank body, the blank that is dried to semi-dry is covered on the mold, and the outer wall of the blank is evenly pressed, and then the mold is removed; Sharp billet, the billet is covered on the sharp barrel of the roller car, rotate the car plate, and rotate with a knife to make the thickness of the billet body appropriate, and the surface and inside are smooth.

Drying the blank, placing the processed blank on the wooden frame to dry; carving, using a knife made of bamboo, bone or iron to carve a pattern on a dried body; Glazing, ordinary round ware uses glaze or glaze, carved ware or large round ware with glaze blowing, most ceramic products need to be glazed before entering the kiln firing; kiln, the ceramic products are loaded into a sagger and continuously fired with a furnace fire; Painting, on the glazed surface of the porcelain has been fired, the pattern is depicted, the color is filled, and then the red furnace is fired at a low temperature.

Ceramic:

Ceramic, that is, a general term for pottery and porcelain. All the clay with two different properties of clay and porcelain clay as raw materials, through the batching, molding, drying, roasting and other processes made of utensils can be called ceramics, Qiaolu ceramics is a variety of products made of natural clay and various natural minerals as the main raw materials through crushing and mixing, molding and calcination.

Pottery fired from clay is called pottery, and utensils fired with porcelain clay are called porcelain. The history of ceramics is an important part of the history of Chinese civilization, the Chinese invented pottery as early as about 8000-2000 BC (Neolithic Age), and Chinese porcelain is also highly regarded by the world for its high practicality and artistry.

It includes a variety of products made from clay or mixtures containing clay through mixing, forming, and calcination. It ranges from the coarsest earthenware to the finest fine pottery and porcelain.