Core material for hot-compacted low-temperature roasted mold cores and method for manufacturing mold cores by adopting core material

A technology of hot pressing and low-temperature roasting, applied in the field of casting and modeling, can solve problems such as low cost, and achieve the effects of low cost, easy operation and control, and high-efficiency production.

Inactive Publication Date: 2013-02-20
CHONGQING JINGRUI CASTING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Disadvantages of the existing technology: it is difficult to efficiently produce thin, precise,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: A kind of core material that the mold core of low-temperature roasting of thermoforming is used and the method for making mold core with this core material, select the investment casting prefabricated precision mold core of making chemical industry collector casting as an example, its steps are as follows :

[0028] (1), prepare the core material that 40 kilograms of thermoforming low-temperature roasted cores are used for subsequent use.

[0029] The core material comprises the following components in parts by weight:

[0030] Particle thickness is equal to 3.5 parts of 200 mesh ammonium dihydrogen phosphate;

[0031] Particle thickness is equal to 0.5 part of 100 mesh magnesium dihydrogen phosphate;

[0032] 52 parts of fused silica;

[0033] 1.2 parts of magnesium oxide,

[0034] Grind the above-mentioned ammonium dihydrogen phosphate, magnesium dihydrogen phosphate, fused quartz and magnesium oxide in parts by weight respectively with a ball mill, ...

Embodiment 2

[0046] A kind of core material that the mold core of low-temperature roasting is used for thermoforming and the method for making mold core with this core material, choose the investment casting prefabricated precision mold core of making chemical industry header casting as an example, its steps are as follows:

[0047] (1), prepare the core material that 40 kilograms of thermoforming low-temperature roasted cores are used for subsequent use.

[0048] The core material comprises the following components in parts by weight:

[0049] Particle thickness is equal to 9 parts of ammonium dihydrogen phosphate of 100 mesh;

[0050] Particle thickness is equal to 6 parts of magnesium dihydrogen phosphate of 100 mesh;

[0051] 55 parts of fused silica;

[0052] 10 parts of magnesium oxide,

[0053] Grind the above-mentioned ammonium dihydrogen phosphate, magnesium dihydrogen phosphate, fused quartz and magnesium oxide in parts by weight respectively with a ball mill, then add the abo...

Embodiment 3

[0065] A kind of core material that the mold core of low-temperature roasting is used for thermoforming and the method for making mold core with this core material, choose the cast steel insert head casting of making insert drill bit as an example, its steps are as follows:

[0066] (1), prepare the core material that 50 kilograms of thermoforming low-temperature roasted cores are used for subsequent use.

[0067] The core material comprises the following components in parts by weight:

[0068] Granules equal to 4 parts of 100 mesh ammonium dihydrogen phosphate;

[0069] Granules equal to 3 parts of 100 mesh magnesium dihydrogen phosphate;

[0070] 23 parts of fused silica;

[0071] Quartz 44 parts;

[0072] 2 parts magnesium oxide,

[0073] Grind the above-mentioned ammonium dihydrogen phosphate, magnesium dihydrogen phosphate, fused quartz and magnesium oxide in parts by weight respectively with a ball mill, then add the above-mentioned components into a mixer and mix th...

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PUM

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Abstract

The invention provides a core material for hot-compacted low-temperature roasted mold cores and a method for manufacturing mold cores by adopting the core material. The core material is characterized by comprising the following components in parts by weight: ammonium dihydrogen phosphate: 3.5-15, monomagnesium phosphate: 0.5-8, quartz and/or fused quartz: 52-71, magnesium oxide: 1.2-10 and paraffin: 13-26; and then the core material is hot-compacted, enchased, roasted and dipping-strengthened to obtain the mold cores. The core material for hot-compacted low-temperature roasted mold cores and the method for manufacturing mold cores by adopting the core material are easy to operate and control, not only investment casting mold cores which are thin, precise, smooth in surface, accurate in size and low in cost can be manufactured, but also manufacture cost of the mold cores is low, and further the mold cores can be produced by investment casting factories in self-actuated, large-batch and high-efficient mode.

Description

technical field [0001] The invention belongs to the field of casting molding, and in particular relates to a core material for hot-press forming low-temperature baked cores and a method for making cores with the core material. Background technique [0002] It is understood that there are two existing methods for forming the inner cavity of a metal casting, one is to set a core in the mold, and the other is to make a core block extending from the mold to the inside of the cavity of the casting (i.e. with core). [0003] For sand casting, the cores usually used are clay sand cores, organic binder sand cores and water glass sand cores. The core strength of the above materials is low and the surface is relatively rough. Larger cores or self-made cores can be produced. With a core, it is also difficult to make a core block extending from the mold to the inner cavity of the casting, so it is not suitable for producing castings with narrow and complex inner cavities. [0004] Sma...

Claims

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Application Information

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IPC IPC(8): B22C1/00B22C9/10
Inventor 王世全闵小俊李从文
Owner CHONGQING JINGRUI CASTING MATERIAL
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