Advantages and disadvantages of ceramic molding process
In the previous article, we introduced different methods of ceramic molding process. In this article, we will introduce the advantages and disadvantages of different molding process methods.
1. Injection molding:
The raw materials are prepared into a fluid slurry, the slurry is injected into the porous gypsum model, and the slurry penetrates into the gypsum model through the contact surface to form a hard layer.
Advantages: The green body structure is uniform, the equipment is simple, and it is suitable for large-sized irregular ceramic products. It can make the shape of the ceramic sculpture sculpture more regular, and at the same time can keep the original shape of the ceramic sculpture more pure; the wall of the sculpture is thin and uniform, easy to hold and move, and labor-saving; the molding operation technology is easier to master, which is conducive to batch replication; The forming cycle is shorter, the raw material consumption is less, and the cost is lower.
Disadvantages: The tire wall is loose and fragile, and it is not easy to form the overall shape of the sculpture with a large body and too complicated shape changes; the mold requires high precision, and the reproduction is more complicated; the production cycle is long, and the mold consumption is large.
However, this molding method is not only widely used in the production of ceramic craft sculptures because of its many advantages, but also is valued by ceramic craft sculpture manufacturers because of its favorable "remaining as it is".
2. Press molding:
(1) Dry pressing molding: The granulated powder with fluidity and appropriate particle size ratio is put into the mold, and the powder is pressed by the press to make the powder into a certain shape.
Advantages: compact body, accurate size, high mechanical strength, simple process, convenient operation, short cycle, suitable for large-scale and mechanical automation production.
Disadvantages: The production requirements of the mold are high, and it is not suitable for complex shape products.
(2) Semi-dry pressing: Add a small amount of water to the ingredients, stir evenly, and press under high pressure.
Advantages: accurate size, high mechanical strength, high efficiency.
Disadvantages: equipment and technical requirements are relatively high.
(3) Isostatic pressing: The sample to be pressed is placed in a high-pressure container, and the sample is uniformly pressurized from all directions by using the incompressible properties of the liquid medium and the property of uniformly transmitting pressure. When the liquid medium is injected through the pressure pump When the pressure vessel is pressed, its pressure is constant and uniformly transmitted to all directions, so that the barren powder is formed into a dense body.
Advantages: precise shape and high efficiency.
Disadvantages: higher equipment and technical requirements.