Processing Technology of Advanced Ceramics After Molding

The processing technology of ceramic blanks after molding (dry pressing, injection, extrusion, isostatic pressing, gel, etc.) is called blank repair.

At present, the formulations and molding processes of various ceramics will produce some redundant parts, such as the tailings of injection molding and the flash caused by the exhaust edge in the mold. Therefore, after molding, some blank repair work can reduce the surface and dimensional quality problems of ceramics after sintering.

Ceramic blank repair is an important process in the ceramic production process, which mainly involves the careful processing and adjustment of the ceramic blank to ensure that its shape, size and surface quality meet the requirements.

I. General steps and precautions for blank repair
1. Steps for blank repair:
(1) First, cut off the excess part of the blank, that is, use a scraper or blank repair knife to scrape along the surface or edge of the blank to make the blank thickness appropriate and the surface and inside smooth.
(2) Use a curved blade to trim the inside of the blank to make the shape meet the requirements.
(3) Trim the bottom of the blank to ensure that the bottom is flat and there is no excess mud.
(4) Use a flat knife to trim the mouth of the blank to make it smooth and regular.

2. Precautions for blank trimming:

(1) Pay attention to maintaining the stability of the blank during blank trimming to avoid deformation or damage.

(2) Master the center of gravity of the blank to ensure that the blank will not tilt or collapse during the blank trimming process.

(3) Pay attention to the selection and sharpening of the tool, keep the tool sharp and flat to improve the efficiency and accuracy of blank trimming.

(4) If cracks or other defects are found in the blank during the blank trimming process, timely measures should be taken to repair or adjust it.

(5) After the blank trimming is completed, a quality inspection should be carried out to ensure that the blank meets the requirements. Unqualified blanks need to be trimmed or scrapped.

II. Factors affecting ceramic blank trimming

1. Selection and sharpening of blank trimming tools: The sharpness and flatness of the blank trimming tools have a great influence on the efficiency and accuracy of blank trimming. Therefore, it is necessary to select appropriate tools and sharpen them regularly.
2. Physical properties of the blank: The physical properties of the blank, such as the strength of the blank, the humidity of the blank (liquid molding), density, viscosity, etc., will also affect the effect of the blank repair, so the blank needs to be properly treated before the blank repair.
3. Operation skills: The operation skills of the blank repair personnel are also an important factor affecting the quality of the blank repair, including the stability of the blank grip, the control of the scraping force, the correctness of the trimming direction, etc.
4. Environmental conditions: Ambient temperature, humidity and cleanliness will also affect the effect of the blank repair, and the working environment needs to be controlled.
5. Equipment performance: The performance of some automated or semi-automated blank repair equipment will also affect the quality and efficiency of the blank repair, and it is necessary to select appropriate equipment and perform regular maintenance.

If you want to obtain high-quality ceramic blank repair effects, you need to consider a variety of factors comprehensively and take corresponding measures to control and manage them.