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Method for manufacturing bottom blowing type cast train wheel graphite mold

A technology for graphite molds and trains, which is applied in the field of preparation of graphite molds for bottom-blown casting train wheels, can solve the problems of unsatisfactory graphite materials, and achieve the effect of good comprehensive performance and easy graphitization

Active Publication Date: 2015-04-08
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] And the graphite material in the prior art can not satisfy the requirement of bottom-blowing type casting train wheel graphite mold preparation, in view of this, propose the present invention

Method used

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  • Method for manufacturing bottom blowing type cast train wheel graphite mold
  • Method for manufacturing bottom blowing type cast train wheel graphite mold
  • Method for manufacturing bottom blowing type cast train wheel graphite mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a graphite mold for bottom-blown casting train wheels, comprising the following steps: crushing, screening, batching, and mixing of calcined coke, and then adding medium-temperature pitch for wet mixing, molding, primary roasting, impregnation, secondary roasting, graphite into a finished product;

[0043] 1. Crushing, screening, batching and mixing of calcined coke: Mix the following calcined coke aggregates in proportion, and heat the aggregates to 90-120°C for dry mixing;

[0044] The particle size range and content of calcined coke are:

[0045]

[0046] 2. Add medium-temperature asphalt for wet mixing: the mass ratio of calcined coke to medium-temperature asphalt is 80:20; first heat the medium-temperature asphalt while vacuuming, the heating temperature is 180-185°C, the vacuum degree is 2000pa, and stir for 30 minutes; Then add the medium-temperature pitch to the calcined coke for kneading, and the kneading temperature is 136-138°C; the...

Embodiment 2

[0053] A method for preparing a graphite mold for bottom-blown casting train wheels, comprising the following steps: crushing, screening, batching, and mixing of calcined coke, and then adding medium-temperature pitch for wet mixing, molding, primary roasting, impregnation, secondary roasting, graphite The finished product is obtained; specifically:

[0054] 1. Crushing, screening, batching and mixing of calcined coke: Mix the following calcined coke aggregates in proportion, and heat the aggregates to 90-120°C for dry mixing;

[0055] The particle size range and content of calcined coke are:

[0056]

[0057] 2. Add medium-temperature asphalt for wet mixing: the mass ratio of calcined coke to medium-temperature asphalt is 82:18; first heat the medium-temperature asphalt while vacuuming, the heating temperature is 206-210°C, the vacuum degree is 1000pa, and stir for 25 minutes; Then add the medium-temperature pitch to the calcined coke for kneading, the kneading temperatur...

Embodiment 3

[0064] A method for preparing a graphite mold for bottom-blown casting train wheels, comprising the following steps: crushing, screening, batching, and mixing of calcined coke, and then adding medium-temperature pitch for wet mixing, molding, primary roasting, impregnation, secondary roasting, graphite into a finished product;

[0065] 1. Crushing, screening, batching and mixing of calcined coke: mix the following calcined coke aggregates in proportion, and heat the aggregates to 90-95°C for dry mixing;

[0066] The particle size range and content of calcined coke are:

[0067]

[0068]2. Add medium-temperature asphalt for wet mixing: the mass ratio of calcined coke to medium-temperature asphalt is 80:20; first heat the medium-temperature asphalt while vacuuming, the heating temperature is 184-185°C, and the vacuum degree is 5000pa. Under this condition Stir for 40 minutes; then add the medium-temperature pitch to the calcined coke for kneading, and the kneading temperatur...

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Abstract

The invention relates to the field of graphite materials, and in particular relates toa method for manufacturing a bottom blowing type cast train wheel graphite mold. The method comprises the following steps: crushing, screening, blending and mixing calcined coke, adding medium-temperature asphalt, and performing wet mixing, molding, primary roasting, dipping, secondary roasting and graphitization, thereby obtaining a finished product, wherein the conditions for adding medium-temperature asphalt for wet mixing are as follows: vacuuming the medium-temperature asphalt while heating, and stirring for 10-40 minutes when the heating temperature is 180-210 DEG C and the vacuum degree is 500-5000pa. The graphite material provided by the invention is moderate in porosity, small in size of pores, uniform in crystal particle, low in ash content, relatively small in thermal expansion coefficient, excellent in mechanical property and antioxidant property, and is a very excellent graphite material for manufacturing bottom blowing type cast train wheel graphite molds.

Description

technical field [0001] The invention relates to the field of graphite materials, in particular to a method for preparing a graphite mold for bottom-blowing cast train wheels. Background technique [0002] Mold is a basic process equipment widely used in industrial production, and the mold industry is the basic industry of the national economy. In modern industrial production, stamping, forging forming, die-casting forming, extrusion forming, plastic injection or other forming processing methods are widely used for product parts, which are matched with forming molds to form blanks into parts that meet product requirements. All types of tools and products we all use in our daily production and lifestyle, ranging from the base from the machine device, the covering of the equipment equipment, to the small size of a screw, button and the shell of various household appliances, are all closely related to molds. The shape of the mold determines the shape of these products, and the ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/524
CPCY02P20/54
Inventor 张培模张培林赤九林张日清阮明礼纪永良杨晓峰
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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