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Alumina ceramic injection molding wax based polyethylene multi-polymer bonding agent method

An alumina ceramic and injection molding technology, which is applied in ceramic molding machines, manufacturing tools, etc., can solve the problems of difficult to prepare ceramic parts with small size, complex shape, size and precision, and limit the application field of ceramics, so as to reduce defects and reduce production. cost effect

Inactive Publication Date: 2009-06-17
王灿
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Problems solved by technology

[0002] The inherent brittleness of ceramic materials and the high hardness of some special ceramic materials make it difficult to produce ceramic parts with small volume, complex shape and high dimensional accuracy by using the traditional powder metallurgy process, that is, the method of pressing powder first and then machining , which largely limits the application fields of ceramics

Method used

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  • Alumina ceramic injection molding wax based polyethylene multi-polymer bonding agent method

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Embodiment Construction

[0025] The present invention is illustrated below in conjunction with accompanying drawing.

[0026] The wax-based polyethylene polymer binder for alumina ceramic injection molding of the present invention is composed of paraffin, low-density polyethylene and stearic acid, and its component and volume ratio are: paraffin: low-density polyethylene: Stearic acid=60:20:14. .

[0027] Utilize the method for injection molding alumina ceramics of the above-mentioned wax-based polyethylene multipolymer binder for injection molding of alumina ceramics, comprising the following steps:

[0028] (1) Preparation of feed:

[0029] Mix and granulate the sinterable ceramic powder and the wax-based polyethylene polymer binder for alumina ceramic injection molding at a volume ratio of 1:1; see Table 3

[0030] Table 3 Composition of alumina binder mixture

[0031]

[0032] Note: in parentheses is the volume percentage

[0033] (2) Then carry out injection molding:

[0034] It is known...

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Abstract

The invention relates to a method for utilizing a wax-based polyethylene multi-polymer adhesive for alumina ceramics injection molding, which consists of wax, low-density polyethylene and stearic acid, wherein components and the volume portion ratio comprise: the wax: the low-density polyethylene: the stearic acid is equal to 60: 20: 14. The wax-based polyethylene multi-polymer adhesive for the alumina ceramics injection molding has excellent intra-system compatibility, rheological properties of an injection suspension, release property, green body strength and degreasing characteristic; and the method for utilizing the wax-based polyethylene multi-polymer adhesive for the alumina ceramics injection molding appropriately controls the proportion of ceramic powder and the adhesive during the feeding preparation as well as the temperature and the process time of the injection molding, degreasing and burning under the condition of not increasing working procedures to obtain an ideal product, thereby reducing the defects of the products and production cost.

Description

technical field [0001] The invention relates to the field of injection molding of ceramic powder, in particular to a method for using a wax-based polyethylene multipolymer binder for injection molding of alumina ceramics. Background technique [0002] The inherent brittleness of ceramic materials and the high hardness of some special ceramic materials make it difficult to produce ceramic parts with small volume, complex shape and high dimensional accuracy by using the traditional powder metallurgy process, that is, the method of pressing powder first and then machining , which largely limits the application fields of ceramics. Ceramics Injection Molding (CIM) is a branch of modern powder injection molding. It has the advantages of one-time molding of complex shape products, high dimensional accuracy of products, no need for subsequent processing or only a small amount of processing, easy to realize production automation and product performance. Excellent features make up fo...

Claims

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Application Information

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IPC IPC(8): C04B35/634C04B35/10B28B1/54
Inventor 王灿姜文华
Owner 王灿
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