A high-pressure molding process for ceramic blanks

Abstract

The invention discloses a ceramic green body high-pressure forming process. The ceramic green body high-pressure forming process comprises the steps of mold closing, mold locking, low-speed filling, high-speed filling, high-pressure grouting, mud discharging, strengthening, mold opening, mold separating, turning over, in-position arranging of a green body receiving vehicle, in-position arranging of a green body bracket, demolding, green body bracket reposition, green body receiving vehicle reposition, mold reposition, mold cleaning and the like. By means of the ceramic green body high-pressure forming process, the production efficiency can be improved, the production period is shortened, and the green body yield is increased; the green body quality is stabilized, the labor intensity is relieved, and automatic control is achieved; and the ceramic green body high-pressure forming process can be suitable for horizontal pressing machines.

Description

Technical field [0001] The invention relates to the field of ceramic manufacturing, in particular to a high-pressure forming process of a ceramic body. Background technique [0002] In the field of ceramic manufacturing, especially in the field of sanitary ware manufacturing, green body forming is an important step. The grouting process is the core part of the green body forming. In the prior art, the green body grouting process has experienced a process from manual grouting to low-pressure grouting and then to high-pressure grouting. Manual grouting has high labor intensity and low production efficiency. The product quality depends largely on the proficiency and experience of the grouting workers, so that the quality of sanitary ware ceramic bodies can be guaranteed. As a result, some companies have gradually developed a low-pressure grouting process. The grouting pressure is generally 0.3 to 0.7Mpa. In the low-pressure pouring process, although the heavy manual labor is elimi...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the lack of sufficient pipeline circulation before grouting, the green body may be defective due to the physical properties of the residual mud being different from the new mud or the presence of gas;

[0005] 2. During high-pressure grouting, the pressure is insufficient, resulting in too long high-pressure grouting time and low production efficiency;

[0006] 3. In the technical solution of this patent, the mud is discharged by tilting the mold by mechanical means, which consumes a lot of energy and takes a long time, and the mud discharge is not clean;

[0007] 4. After the solidification, the mud is discharged, so that the thickness of the green body and the quality of the green body cannot be guaranteed;

In this method, due to the continuous vacuuming of the upper mold, the water film formed by the blank in S12 demoulding has been destroyed, so in the demoulding step of S16, even if the vacuum is turned off, the blank may still be bonded to the mold If it is too tight, it will be difficult to demold and scratch the green body, making the surface of the green body uneven, which will cause defects in the green body during the demoulding process, increase the reject rate, and reduce the qualified rate;

[0010] 7. The method is only suitable for longitudinal presses arranged vertically in the mold, and cannot be applied to horizontal presses

[0014] 11. In this technical plan, the cleaning process after the last molding of the day is not stipulated, which may lead to problems in the quality of the green body due to insufficient mold cleaning and unqualified molds in the next day’s production

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