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Ceramic spindle machining technology

A spindle processing and process technology, applied in the field of ceramic material preparation, can solve the problems of low loading capacity and high sintering cost, and achieve the effects of improving production efficiency, reducing production cost, and improving product qualification rate

Inactive Publication Date: 2018-08-24
CHANGSHU INNOVATION CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it can only be sintered layer by layer, and the loading capacity is low, resulting in extremely high sintering cost per unit volume.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A ceramic spindle processing technology, comprising the steps of:

[0017] (100) Pre-sintering: first pre-sinter the compacted body at 1050°C for 1 hour, remove the binder (polyvinyl alcohol) and moisture in the green body, and shrink the volume of the green body by 2-3%. The density of the green body after the volume shrinkage reaches 3g / cm 3 . During the pre-sintering, first heat to 200°C with a temperature rise rate of 50-55°C / h, and then heat to 1050°C with a temperature rise rate of 250-300°C / h and keep warm for 1 hour; the pre-sintered plain The mechanical strength of the blank is 350-450MPa;

[0018] (200) Machining: Machining the pre-sintered green body to the specified size; due to the strict control of the mechanical strength of the pre-sintered green body, machining can be carried out under such mechanical strength to meet the needs of various designs The green body structure is not easy to break during processing, and the product qualification rate can be...

Embodiment 2

[0021] A ceramic spindle processing technology, comprising the steps of:

[0022] (100) Pre-sintering: first pre-sinter the compacted body at 1100°C for 1 hour, remove the binder (polyvinyl alcohol) and moisture in the green body, and shrink the green body by 2-3%. The density of the green body after the volume shrinkage reaches 3g / cm 3 . During the pre-sintering, firstly heat to 200°C at a rate of temperature rise of 50-55°C / h, and then heat to 1100°C at a rate of temperature rise of 250-300°C / h for 1 hour; the pre-sintered plain The mechanical strength of the blank is 350-450MPa;

[0023] (200) Machining: Machining the pre-sintered green body to the specified size; due to the strict control of the mechanical strength of the pre-sintered green body, machining can be carried out under such mechanical strength to meet the needs of various designs The green body structure is not easy to break during processing, and the product qualification rate can be increased to more than ...

Embodiment 3

[0026] A ceramic spindle processing technology, comprising the steps of:

[0027] (100) Pre-sintering: first pre-sinter the compacted body at 1075°C for 1 hour, remove the binder (polyvinyl alcohol) and moisture in the green body, and shrink the green body by 2-3%. The density of the green body after the volume shrinkage reaches 3g / cm 3 . During the pre-sintering, firstly heat to 200°C at a rate of temperature rise of 50-55°C / h, and then heat to 1075°C at a rate of temperature rise of 250-300°C / h for 1 hour; the pre-sintered plain The mechanical strength of the blank is 350-450MPa;

[0028] (200) Machining: Machining the pre-sintered green body to the specified size; due to the strict control of the mechanical strength of the pre-sintered green body, machining can be carried out under such mechanical strength to meet the needs of various designs The green body structure is not easy to break during processing, and the product qualification rate can be increased to more than ...

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Abstract

The invention discloses a ceramic spindle machining technology. The technology comprises the steps as follows: firstly, a biscuit which is formed by pressing is pre-sintered at 1,050-1,100 DEG C for 1h, and a binder and moisture in the biscuit are removed, so that the volume of the biscuit is shrunk by 2%-3%; then, the biscuit is machined to the specified dimension; finally, sintering is performed. By means of the technology, the product percent of pass and the production efficiency can be improved, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the field of preparation of ceramic materials, in particular to a ceramic spindle processing technology. Background technique [0002] The ceramic spindle press molding process, firstly, mix the raw and auxiliary materials + binder polyvinyl alcohol solution according to the formula, and then spray granulate to obtain the granulated powder that meets the requirements of the dry isostatic pressing molding process. [0003] The spindle blank pressed by this molding process has a certain mechanical strength (bending strength is approximately equal to 150-200MPa), and can be easily polished, but cannot be subjected to more complicated machining. Due to the low mechanical strength, the green body is prone to twisting or cracking during machining, and the production pass rate is generally lower than 70%. [0004] In addition, the ceramic spindle green body produced by this method contains part of the binder polyvinyl alcohol, so it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/64
CPCC04B35/64C04B2235/608C04B2235/6562C04B2235/661
Inventor 龚成张新元张舟余磊
Owner CHANGSHU INNOVATION CERAMICS