Ceramic Manufacturing - Molding

The forming process is the process of processing raw materials or blanks (semi-finished products) into blanks or finished products with certain shapes, sizes, microstructures, and mechanical properties. Different forming methods can be selected based on the characteristics of the material and the desired shape and size of the product.

Dry pressing is a medium- to high-volume forming method suitable for parts ranging from simple (e.g., discs or sheets) to relatively complex (e.g., parts with holes or grooves). Parts produced by dry pressing are typically not subjected to any subsequent greening processes and are manufactured to sintering tolerances, where possible.

Isostatic pressing (IPC) is a small-to-medium-sized volumetric forming technology, including cold IPC, warm IPC, and hot IPC.

Cold IPC: Performed at room temperature, typically using rubber or plastic as the mold material and a liquid as the pressure medium. Primarily used for forming powder materials, providing blanks for further sintering, forging, or hot IPC processes.

Warm IPC: Pressing temperatures are generally between 80-120℃, but can also be as high as 250-450℃, using special liquids or gases to transmit pressure. Mainly used for materials such as graphite, polyamide, and rubber that cannot be formed at room temperature, to obtain a solid blank at elevated temperatures.

Hot IPC: A process technology that subjects materials to isostatic pressing under both high temperature and high pressure. It is not only used for powder consolidation but also allows the two-step processes of traditional powder metallurgy—forming and sintering—to be completed simultaneously.

Extrusion molding is a highly efficient and continuous molding process, particularly suitable for long ceramic parts with a constant cross-sectional shape. We mix ceramic powder with organic binders to create a ceramic preform with good plasticity, which is then extruded through a specific die under specific pressure.

Ceramic injection molding is a method in which ceramic powder and organic substances (such as binders and plasticizers) are mixed evenly and then injected into a mold under high temperature and pressure using an injection molding machine. Its molding principle is similar to that of plastic injection molding, but the materials and process requirements are more complex.

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What is ceramic forming technology?

Ceramic forming technology refers to the process of processing ceramic powder into blanks with specific shapes and sizes using various methods. In GORGEOUS CERAMICS (GGS), common forming methods include dry pressing, isostatic pressing, injection molding, and extrusion molding.

How should I choose the appropriate ceramic molding process?

You should choose the appropriate molding process based on the specific structure, size, and scale of your product. For example, for complex, intricate ceramic products, we recommend injection molding; for products requiring high density, isostatic pressing can be used; and for long tubes and honeycomb ceramics, we recommend extrusion molding.

What defects can occur during the molding process of fine ceramics?

Without skilled technical experience, a series of problems are very likely to occur during the molding process of ceramics, such as cracking, bubbles, deformation, and uneven density.

What are the differences between different molding processes?

Dry pressing has lower costs and is suitable for mass production; extrusion molding is suitable for specific types of ceramic products; injection molding has high mold costs but is suitable for complex and high-precision ceramic products; while isostatic pressing has high equipment costs but produces ceramics with excellent performance.