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A molding die and molding process for a continuous fiber reinforced ceramic filter element

A technology for molding molds and continuous fibers, which is applied in the field of molding molds and molding techniques for ceramic filter elements, can solve problems such as difficulty in suction filtration and cleaning, uneven suction filtration, and difficulty in demoulding, and achieve low manufacturing costs, easy molding, and The effect of simple structure

Active Publication Date: 2021-01-22
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the diameter of the perforation is less than 2mm, it will be easily blocked by the slurry during the molding process, and it will be difficult to filter and clean. If the diameter is greater than 3mm, it will cause uneven suction and even difficulty in demoulding.

Method used

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  • A molding die and molding process for a continuous fiber reinforced ceramic filter element
  • A molding die and molding process for a continuous fiber reinforced ceramic filter element
  • A molding die and molding process for a continuous fiber reinforced ceramic filter element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a porous mold for ceramic winding molding, that is, a molding mold 1 for a continuous fiber-reinforced ceramic filter element. It includes a pipe body with a diameter of 30-120mm and a length of 1500-3000mm. The pipe body is provided with a plurality of perforations 2 evenly distributed on the main body of the pipe body. The diameter of the perforations 2 is 2-3mm. The spacing is 5-10mm, and the material of the pipe body is preferably metal. If the diameter of perforation 2 is less than 2mm, it is easy to be blocked by slurry during the molding process, and suction filtration and cleaning are difficult. If the diameter is larger than 3mm, it will cause uneven suction filtration and even difficulty in demoulding. The forming mold has a taper of not less than 2% along the length direction and the demoulding direction, otherwise, if the taper is too small, it will cause difficulty in demoulding due to the low strength of the dried green body.

[0...

Embodiment 2

[0050] The features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The features of this embodiment that are different from Embodiment 1 are:

[0051] Design and process a porous forming mold with a diameter of 40mm and an effective length of 1500mm according to the above-mentioned embodiment, fix the closed end of the mold on the rotary chuck of the winding equipment, and connect the other end with the vacuum system through a rotary joint. When winding, the continuous fiber passes through the short fiber slurry containing carboxymethyl cellulose and polyvinyl alcohol, and is wound along the mold at a certain angle. In the winding process, the initial vacuum degree is controlled at 0.02MPa. As the winding progresses, the vacuum degree gradually increases to 0.06MPa. When the thickness of the green body reaches 10mm, stop winding, remove the vacuum system, take out the forming mold, and put it into the drying kiln Drying and demoul...

Embodiment 3

[0054] The features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The features of this embodiment that are different from Embodiment 1 are:

[0055] Design and process a porous forming mold with a diameter of 60mm and an effective length of 1600mm according to the above-mentioned embodiment, fix the closed end of the mold on the rotary chuck of the winding equipment, and connect the other end with the vacuum system through a rotary joint. When winding, the continuous fiber passes through the short fiber slurry containing carboxymethyl cellulose and polyvinyl alcohol (amount of 1:2), and is wound along the mold at a certain angle. In the winding process, the initial vacuum degree is controlled at 0.02MPa. As the winding progresses, the vacuum degree gradually increases to 0.05MPa. When the thickness of the green body reaches 11mm, stop winding, remove the vacuum system, take out the forming mold, and put it into the drying kiln D...

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Abstract

The invention relates to a forming moldand process of a continuous fiber-reinforced ceramic filtering element. The forming mold includes a pipe body with the diameter being 30-120 mm, a plurality of perforations evenly distributed on a main body of the pipe body are formed in the pipe body, the diameter of the perforations is 2-3 mm, and the spacing is 5-10 mm; the diameter and spacing of the perforations are verified by a large number of technological experiments according to the diameter and length of the pipe body, if the diameter of the perforations is less than 2 mm, the perforations areprone to being blocked by slurry and difficult to suck, filter and clean in the forming process, if the diameter of the perforations is more than 3 mm, the fact of uneven suction filtration and even difficult demolding can be caused, if the spacing of the perforations is less than 5 mm, the conditions that the suction filtration intensity is too great, the density of a green body is increased, theair permeability is affected and demolding of the green body is difficult are caused, if the spacing of the perforations is more than 10 mm, the suction filtration intensity is too low, and in the winding process, ceramic slurry flows easily and consequently the uneven green body is caused. The forming mold can effectively guarantee the uniform structure of the forming green body, and can be applied to forming of tubular or candle-shaped filtering elements.

Description

technical field [0001] The invention relates to the technical field of ceramic filter materials, in particular to a forming mold and a forming process of a continuous fiber reinforced ceramic filter element. Background technique [0002] Ceramic filter materials have the advantages of high temperature resistance and good thermal stability, and can be widely used as hot gas purification materials, catalyst carriers, etc. Among them, ceramic fiber filter materials, especially continuous fiber reinforced ceramic filter materials, have the advantages of high porosity, good thermal stability, low filtration resistance, good fracture toughness, etc., and show great advantages in the field of high temperature gas purification. [0003] The preparation process of continuous fiber reinforced ceramic filter elements includes fiber weaving process and winding process. Among them, the winding process has the advantages of simple process and low production cost, and has great development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/20B28B1/52B28B7/12
Inventor 王响薛友祥张久美唐钰栋赵世凯
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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