Long carbonaceous molding, long carbonaceous product, and method of production thereof

A technology for long-sized and formed bodies, applied in the field of long-sized carbon formed bodies, which can solve the problems of different wall thicknesses between the curved end and the central part, and the inability to obtain carbon products, etc., and achieve good results in mass production

Inactive Publication Date: 2005-02-02
TOYO TANSO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Also, unlike other ceramic powders, carbon powder has poor fluidity, so when the near-net shape method is used, defects such as cracks may occur in the carbon molded body due to the shape of the molded body.
Especially in the case of long molded objects with an aspect ratio of 3 or more, problems such as twisting, bending, or differences in wall thickness between the ends and the center of the molded body occur.
Also, even if there is no problem in forming, the carbon formed body shrinks in the subsequent heat treatment process, and a carbon product of a specified size may not be obtained.

Method used

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  • Long carbonaceous molding, long carbonaceous product, and method of production thereof
  • Long carbonaceous molding, long carbonaceous product, and method of production thereof
  • Long carbonaceous molding, long carbonaceous product, and method of production thereof

Examples

Experimental program
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Effect test

Embodiment 1～6

[0064] First, the formation of a long carbon molded body using a dry CIP apparatus will be described. As the raw material powder, carbon powder and binder pitch were kneaded, pulverized to an average particle diameter of 15 μm after kneading, and kneaded again with copper powder having an average particle diameter of 5 μm after pulverization. And the ratio of carbon powder and copper powder is 2:3.

[0065] Next, a molded body is molded from the raw material powder using the dry CIP apparatus described in the above embodiment. Specifically, the forming pressure of the dry CIP device is 343MPa, and the forming size is 48×38×652 (unit: mm), and the forming weight is 3099g. figure 2 A long carbon molded body as shown.

[0066] according to figure 2 This elongated carbon molded body was cut out at the dimensional positions as shown. Specifically from figure 2 Starting from the left end of the long-sized carbon shaped body, cut it into 70mm shaped body 18, 10mm shaped body ...

Embodiment 7

[0076] As raw material powder, carbon powder and binder pitch were kneaded, and after kneading, pulverized to an average particle diameter of 30 μm. Next, a molded body is molded from the above-mentioned raw material powder using the CIP apparatus described in the above-mentioned embodiment. Specifically, the forming pressure of the dry CIP device is 100MPa, the forming size is φ50×650 (unit: mm), and the forming weight is 2050g. Figure 8 The long molded body 28 as shown is then heat-treated at 1200°C in a sintering furnace. The molded body 28 subjected to this heat treatment was used as a sample of Example 7.

Embodiment 8

[0082] The sample of Example 7 was applied to a resin-impregnated molded body as a sample of Example 8.

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Abstract

Long carbonaceous moldings and long carbonaceous products as well as methods of production thereof by which carbonaceous products can be obtained without allowing twisting or curving and with less frequent occurrence of cracking etc. even when subjecting the heat treatment and which are excellent in mass productivity are provided. The long carbonaceous moldings have an aspect ratio of 3 to 20 and showing fluctuations in the density thereof of not more than 0.05 Mg / m<3> throughout the whole moldings.

Description

technical field [0001] The present invention relates to a long carbon molded body with an aspect ratio of 3 to 20 in the axial direction length, a long carbon product and a manufacturing method thereof. Background technique [0002] Carbon products are formed by cold isopressing (or hereinafter referred to as CIP) by adding binders such as coal tar pitch to petroleum coke and coal coke that are crushed into several μm, kneading, re-grinding, and particle size adjustment. It is manufactured by heat treatment and mechanical processing after forming a square column or cylindrical block by forming means such as metal mold forming. [0003] However, with these conventional methods, in order to obtain the target long-sized carbon product, the carbon material block is cut out, and the shape of the product is precisely processed after rough machining, so the waste of the carbon material block itself is too much, the processing time is long, and the yield rate is low. Lower, so the ...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B41/48C04B41/50C04B41/51C04B41/83C04B41/85C04B41/87C04B41/88
CPCC04B41/5001C04B41/009C04B41/87C04B38/00C04B41/5064C04B41/88C04B41/4823C04B41/51C04B41/83C04B41/5059C04B41/85B30B11/001Y10T428/30C04B35/52C04B38/0054C04B35/528
Inventor 小仓浩昭丰田纯二早川宏野崎秀彦
Owner TOYO TANSO KK
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