Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of moulding sand dedicated for stainless steel precision casting

A precision casting and special-purpose technology, applied in casting molding equipment, molds, cores, etc., can solve the problems of high local pressure, overheating, poor heat dissipation, etc., achieve high strength and thermal stability, reduce roughness, Good collapsibility effect

Inactive Publication Date: 2018-09-11
FOSHAN GAOMING LIGANG PRECISION CASTING CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Among the above characteristics, it is most difficult to meet the requirements for strength, stability and air permeability when applied to the precision casting process.
Especially in the casting process of large-volume castings, due to poor heat dissipation due to structural reasons, problems such as local overheating and local excessive pressure have become the culprit for the failure of the precision casting process to improve the yield.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method step of molding sand in the present embodiment is as follows:

[0038] Step 1, weighing raw materials according to the following components and parts by mass:

[0039] 30 parts of quartz sand

[0040] Silicon carbide sand 15 parts

[0041] Aluminum oxide powder 4 parts

[0042] Furan resin 0.8 parts

[0043] Lubricating component 10 parts

[0044] Environmentally friendly components 1 part

[0045] The environmental protection components are vitrified microbeads, bottom ash after incineration of edible fungus chaff, montmorillonite, and zirconia powder in a mass ratio of 1:1:0.4:0.08. The particle size of vitrified microbeads, bottom ash, montmorillonite, and zirconia powder after incineration of edible fungus chaff is less than 5 μm.

[0046] The lubricating component is a component formed by mixing magnesium hydroxysilicate, montmorillonite, and rutile titanium dioxide at a ratio of 1:0.3:0.05. The particle size of magnesium hydroxysilica...

Embodiment 2

[0051] The preparation method step of molding sand in the present embodiment is as follows:

[0052] Step 1, weighing raw materials according to the following components and parts by mass:

[0053] Quartz sand 35 parts

[0054] Silicon carbide sand 12 parts

[0055] Aluminum oxide powder 2 parts

[0056] Furan resin 1.0 parts

[0057] Lubricating component 10 parts

[0058] Environmentally friendly components 2 parts

[0059] The environmental protection components are vitrified microbeads, bottom ash after incineration of edible fungus chaff, montmorillonite, and zirconia powder in a mass ratio of 1:1.2:0.4:0.1. The particle size of vitrified microbeads, bottom ash, montmorillonite, and zirconia powder after incineration of edible fungus chaff is less than 5 μm.

[0060] The lubricating component is a component formed by mixing magnesium hydroxysilicate, montmorillonite, and rutile titanium dioxide at a ratio of 1:0.2:0.08. The particle size of magnesium hydroxysilicate,...

Embodiment 3

[0065] The preparation method step of molding sand in the present embodiment is as follows:

[0066] Step 1, weighing raw materials according to the following components and parts by mass:

[0067] Quartz sand 40 parts

[0068] Silicon carbide sand 15 parts

[0069] Aluminum oxide powder 3 parts

[0070] Furan resin 1.5 parts

[0071] Lubricating component 12 parts

[0072] 1.4 parts of environmental protection components

[0073] The environmental protection components are vitrified microspheres, bottom ash after incineration of peanut shells, montmorillonite, and zirconia powder in a mass ratio of 1:1.2:0.3:0.1. Vitrified beads, bottom ash after incineration of peanut shells, montmorillonite, and zirconia powder have a particle size of less than 5 μm.

[0074] The lubricating component is a component formed by mixing magnesium hydroxysilicate, montmorillonite, and rutile titanium dioxide at a ratio of 1:0.3:0.08. The particle size of magnesium hydroxysilicate, montmor...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a moulding sand dedicated for stainless steel precision casting. The preparation method comprises following steps: step one, grinding moulding sand rawmaterials until the size is smaller than 5 [mu]m, mixing raw materials, and grinding the mixture in a planet type grinding machine until the granularity is in a range of 1-2 [mu]m to obtain a mouldingsand body; step two, mixing phosphoric acid and p-toluene sulfonic acid according to a mole ratio of 1: (1-1.1) to prepare a furan resin curing agent; and step three, 30 minutes before the moulding sand is used, evenly mixing the moulding sand body prepared in the step one and the furan resin curing agent prepared in the step two to obtain the moulding sand. The prepared moulding sand is suitablefor stainless steel precision casting, has high strength and thermal stability, can tolerate a high temperature of 1500 DEG C or higher and a large force during the stainless steel casting process, and is solid and durable.

Description

technical field [0001] The invention belongs to the field of precision casting, and in particular relates to a method for preparing special molding sand for stainless steel precision casting. Background technique [0002] Casting is a method of heating metal into a liquid state, and then pouring the liquid metal slurry into a mold with a certain shape, so that the liquid metal slurry fills the cavity under the action of external force, such as pressure and gravity, cools and solidifies to form a cavity shape The process method of the casting. Among many casting methods, the sand casting process is the most common and most widely used in precision casting. In the sand casting process, due to the heat of the high-temperature molten metal, the sand will generate gas or the surface will change in shape, and these changes will change the quality of the casting. The quality of castings is closely related to the quality of molding sand. In the casting production process, the defe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02B22C1/22
CPCB22C1/02B22C1/224
Inventor 王立峰
Owner FOSHAN GAOMING LIGANG PRECISION CASTING CO LTD