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Bed die of large thermal-pressure mould and its production thereof

A technology of hot pressing molds and manufacturing methods, which is applied in the direction of casting and molding equipment, etc., and can solve the problems of low tensile strength and restrictions on wider application

Inactive Publication Date: 2006-05-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Because the fibers are basically arranged in the same direction, the winding method is convenient to increase the volume fraction of the fibers in the composite material, which is most conducive to giving full play to the high-strength properties of the reinforcing fibers, but its wider application is limited due to its low tensile strength perpendicular to the fiber direction

Method used

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  • Bed die of large thermal-pressure mould and its production thereof
  • Bed die of large thermal-pressure mould and its production thereof
  • Bed die of large thermal-pressure mould and its production thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: prepare inner diameter 250 millimeters, wall thickness 20 millimeters, the negative mold of length 200 millimeters

[0023] 1) Take a section of a common electrode graphite cylinder with a length of 250 mm and a diameter of 250 mm. Drill a through hole with a diameter of 30 mm in the center of the above-mentioned graphite cylinder to install the rotating shaft.

[0024] 2) Install the above-mentioned graphite cylinder on the hand-cranked turret so that it can rotate with the hand-crank and effectively brake.

[0025] 3) Fix the high-strength carbon fiber spindle on another rotating shaft, pass the carbon fiber yarn around the pulley inside the dipping tank, and fix it on the outer edge of one end of the graphite cylinder with glue (502 glue or the like). The prepared B-stage phenolic acetone emulsion is contained in the dipping tank.

[0026] 4) Shake the handle to slowly and tightly wind the carbon fiber yarn soaked in the glue solution on the graphite ...

Embodiment 2

[0032] Embodiment 2: the preparation wall thickness is 15 millimeters, inner diameter 200 millimeters, the cylinder of long 100 millimeters

[0033] 1. Cut out a section of ordinary electrode graphite cylinder, and drill a through hole in the center of the above graphite cylinder to install the rotating shaft;

[0034] 2. Install the above-mentioned graphite cylinder on the hand-cranked turret so that it can rotate with the hand-crank and effectively brake.

[0035] 3. Choose a high-strength carbon fiber narrow belt (only carbon fiber in the warp direction, and fix it with sparse fine cotton yarn in the weft direction. This narrow belt is available in the market and is mainly used to combine with epoxy resin glue to strengthen bridges, beams, columns, and key structures such as shear walls). Narrow bags have a width of less than 100 mm and a thickness of less than 0.5 mm.

[0036] 4. Fix one end of the narrow bag on the prepared graphite column, which can be fixed with 502 g...

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Abstract

A female die of large hot pressing die set is prepared from the ordinary electrode graphite and carbon-carbon composition through dipping the high-strength carbon fiber yarn or unidirectional narrow carbon fiber cloth in thermosetting resin, winding them on the surface of an electrode graphite column, heating for solidifying, high-temp carburizing to obtain resin carbon, and removing part or all of said graphite column.

Description

Technical field: [0001] The invention relates to a graphite hot-press mold necessary for the production process of advanced materials such as hot-press sintered special ceramics, ceramic matrix composite materials and powder metallurgy products. Background technique: [0002] Hot pressing sintering is a very important sintering process for advanced materials such as special ceramics, ceramic matrix composites, and powder metallurgy products. Hot-pressing sintering samples are a technological measure with the best product performance among various sintering methods, and some special-purpose materials and devices can only be manufactured by hot-pressing sintering process. [0003] In the hot press sintering process, the sintered powder is preformed or directly put into a mold made of graphite and other materials without preforming, and then the whole system is placed inside the hot press sintering furnace. While the temperature is rising and sintering, the hydraulic piston ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C7/00
Inventor 黄向东李强潘祖金
Owner FUZHOU UNIV
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