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Method for producing an inorganic calcined substance

A manufacturing method and inorganic technology, applied in the direction of manufacturing tools, chemical instruments and methods, ceramic products, etc., can solve the problems of shape retention, productivity, danger, etc., and achieve the effect of good physical properties

Inactive Publication Date: 2008-08-20
NICHIHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when forming a large product size, there is a risk of problems in shape retention and productivity with only powder and fine fibers

Method used

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  • Method for producing an inorganic calcined substance
  • Method for producing an inorganic calcined substance
  • Method for producing an inorganic calcined substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] Examples of the present invention are listed below.

[0144] Examples 1-6 and Comparative Examples 1-6 were produced with the raw material mix|blending and manufacturing conditions shown in Table 1 and Table 2.

[0145] The pressing pressure is 0.5-30MPa, and the firing is carried out at 1100-1250°C for 1-3 hours.

[0146] All aspects of physical properties are shown in Table 3 and Table 4.

[0147] The flexural strength was measured in accordance with JIS A 1408.

[0148] Freeze-thaw resistance expansion rate The thickness expansion rate after 600 cycles of the freeze-thaw resistance test (thawing method in freezing water based on JIS A 1435) is represented by the following symbols: no problem → ○ (good), elongation occurs → △ (slightly poor), large extension → × (poor).

[0149] Dimensional stability is the change in water absorption elongation after 15 days of water absorption, expressed by the following symbols: no problem → ○ (good), elongation occurs → △ (sligh...

Embodiment

[0154] Example 1

[0155] 【Table 2】

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Abstract

The invention provides a method for producing a large sized inorganic calcined substance with good properties using dry press-molding and semi-dry press-molding. The inorganic calcined substance producing method uses a press machine having an upper plate, a lower plate, and a frame portion, and includes the following steps: a step of positioning a raw material mixture for forming a rear surface layer or a front surface layer over the lower plate, a step of positioning a raw material mixture for forming a core layer over the raw material mixture of rear surface layer or front surface layer, a step of positioning a raw material mixture for forming a front surface layer or a rear surface layer over the raw material mixture of core layer, and press-molding the stacked three layers of raw material mixture to form a press-molded article using the lower plate and the upper plate.

Description

technical field [0001] The present invention relates to a method for producing an inorganic fired body mainly composed of hydraulic inorganic materials, vitreous materials, aggregates, and reinforcing fibers. Background technique [0002] Conventional fired products include extrusion molding, wet press molding, and the like as methods for producing tiles, for example. [0003] In extrusion molding, it is possible to easily extrude by using a slippery component such as clay as a raw material. [0004] In addition, during wet press molding, adding slippery ingredients such as clay, or adding an appropriate amount of water, and dehydrating pressing, etc., high-pressure pressing to make the raw materials uniform, thereby making moldings. For example, Japanese Patent Application Publication No. 6-345529 proposes to use a slurry with siliceous raw materials, cement as a calcareous raw material, and a glassy component as the main components, and form it by a rotary screen (pill ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B3/00B28B13/02
CPCB28B13/022B28B13/023B28B13/0295B32B18/00C04B32/005C04B33/138C04B35/63416C04B35/803C04B2111/00612C04B2235/3208C04B2235/3418C04B2235/3454C04B2235/36C04B2235/5212C04B2235/604C04B2235/608C04B2235/96C04B2237/66C04B33/34C04B33/36C04B2235/5232Y02W30/91Y02P40/60C04B14/06C04B14/08C04B14/18C04B14/42C04B14/4643C04B14/48C04B16/0633C04B18/082C04B18/141C04B18/146C04B22/064C04B38/0655C04B38/0675C04B40/0259C04B40/0268
Inventor 河合秀宪
Owner NICHIHA CORP