Ceramic grouting forming method and mold thereof

A technology of grouting molding and molding methods, which is applied in the direction of ceramic molding machines, die-casting molds, mold auxiliary parts, etc., can solve problems such as high cost, easy hollowing, and difficult pressure control, and achieve uniform density, prevent delamination or Cracking, stress cracking reduction effect

Inactive Publication Date: 2022-01-25
CHONGQING GENORI IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, die-casting molding and cold isostatic pressing molding are costly and require a large-scale site to accommodate the corresponding molding equipment; tape-casting molding needs to add a large amount of organic solvents, and the use of organic solvents is easy to cause environmental pollution
Grouting molding is divided into gypsum mold molding and pressure grouting molding. Among them, gypsum mold molding is a traditional molding method, which is prone to hollowing in the process of making solid products; while pressure grouting molding is currently difficult to control the pressure. And uneven pressure distribution can easily lead to problems such as cracking of finished products

Method used

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  • Ceramic grouting forming method and mold thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A 4mm thick EVA foam material layer and a PTFE filter membrane layer with a pore size of 1.2 μm are sequentially laid on the inner surface of the porous panel. The 25% compressive stress of the EVA foam material layer is 45-55kPa. Inject the alumina ceramic slurry into the mold at a pressure of 0.1 MPa from the grouting port. After the pressurized grouting is completed, keep the pressure at 0.1 MPa for 4 hours. After the pressure is maintained, close the grouting valve and dry under normal temperature and pressure. After 8 days, the green body was demoulded to obtain the green body, which was then sintered at 1650°C after placing the green body to a constant weight.

Embodiment 2

[0026] On the inner surface of the porous panel, a 12mm thick EVA foam material layer and a polypropylene filter membrane layer with a pore size of 0.5 μm are sequentially laid. The 25% compressive stress of the EVA foam material layer is 45-55kPa. Inject the alumina ceramic slurry into the mold at a pressure of 0.5 MPa. After the pressurized grouting is completed, keep the pressure at 0.5 MPa for 12 hours. After the pressure is maintained, close the grouting valve and dry it at room temperature and pressure for 3 days. , Demoulding to get the green body, place the green body to constant weight and then sinter at 1650°C.

Embodiment 3

[0028] On the inner surface of the porous panel, an 8mm thick plastic-rubber composite material layer and a polyethersulfone filter membrane layer with a pore size of 0.8 μm are sequentially laid. The 25% compressive stress of the plastic-rubber composite material layer is 30-50kPa. After closing the mold Inject the alumina ceramic slurry into the mold at a pressure of 0.1MPa through the grouting port. After the pressure grouting is completed, keep the pressure at 0.1MPa for 4 hours. After the pressure keeping, close the grouting valve and place it under normal temperature and pressure. Dry for 8 days, demould to obtain the green body, place the green body to constant weight, and then sinter at 1650°C.

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Abstract

The invention relates to a ceramic grouting forming method and a mold thereof, and belongs to the technical field of material forming. An elastic material layer and a filtering film layer are sequentially laid on the inner surface of a porous panel, and after mold closing, pressurized grouting and pressure maintaining are conducted on a mold through a grouting opening; after pressure maintaining is completed, a grouting valve is closed, and drying, demolding and sintering are conducted. In the pressurized grouting and pressure maintaining process, the elastic material layer in the mold is pressed to elastically deform, and the elastic material layer rebounds after pressure is removed; inward compression force is evenly provided for a grouting blank, and uniform distribution and uniform density of the grouting blank are achieved; and therefore the blank is prevented from being layered or cracked. In the drying process, the elastic material can retain a part of moisture, the surface and the center of the blank are in a humidity balance state in the drying process, and the stress cracking phenomenon caused by different humidities of the surface and interior of the blank is reduced.

Description

technical field [0001] The invention belongs to the technical field of material forming, and relates to a ceramic grouting forming method and a mold thereof. Background technique [0002] There are many ways to form plate ceramics, including die casting, cold isostatic pressing, tape casting and slip casting. Among them, die-casting molding and cold isostatic pressing molding are costly and require a large-scale site to accommodate the corresponding molding equipment; tape-casting molding requires the addition of a large amount of organic solvents, and the use of organic solvents is likely to cause environmental pollution. Grouting molding is divided into gypsum mold molding and pressure grouting molding. Among them, gypsum mold molding is a traditional molding method, which is prone to hollowing in the process of making solid products; while pressure grouting molding is currently difficult to control the pressure. And uneven pressure distribution can easily lead to problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/26B28B7/34B28B7/46B28B7/00
CPCB28B1/265B28B1/263B28B1/261B28B7/348B28B7/46B28B7/0002
Inventor 余宜璠陈立航贺邦杰肖金杨佐东
Owner CHONGQING GENORI IND CO LTD
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