As we all know, alumina ceramics are ceramic products that use alumina as the main material. With a series of characteristics such as high melting point, high hardness, high insulation resistance, and good chemical stability, they are widely used in wear-resistant materials, high-temperature structural materials, electrical insulation materials, and chemical corrosion resistant materials. And injection molding is one of the main molding methods for alumina ceramics. Do you know what aspects need to be paid attention to in alumina ceramic injection molding? Below, the editor will introduce to you:

Aluminum oxide ceramic injection molding needs to pay attention to the following aspects:

1. Degreasing:

During the injection molding of alumina ceramics, the heating rate is generally set at 3-5 ℃/b during the degreasing process, which takes about 5-10 days. However, when carried out in a protective atmosphere with a pressure of 0.5MPa, the degreasing can be completed within 40 hours

2. Flowability of raw materials:

The ceramic particles used in injection molding are generally composed of 80-90% (important ratio, the same below) powder and 10-20% binder. The binder is removed during the degreasing process, so the amount of alumina ceramic added should be kept to a low limit. However, it should be noted that insufficient addition can affect the forming effect. In addition, the flowability of alumina ceramic particles becomes worse when the particle size is smaller and the shape deviates from the spherical shape. Therefore, it is necessary to use a simple method to test the flowability when applying

3. Defects generated by forming conditions:

If the forming conditions are not correct, various defects will occur, among which the key is the fusion welding line. If the formed form has through holes or blind holes, this type of defect is prone to occur. Therefore, we must pay attention to the design of molds for alumina ceramics, especially the type, position, size, and number of openings

In summary, there are some aspects that need to be paid attention to in the injection molding of alumina ceramics. By paying attention to these aspects, we can help you achieve better quality in the injection molding of alumina ceramics