Powder injection molding method for silicon carbide ceramic sand-blasting nozzle

A technology of powder injection molding and silicon carbide ceramic powder, which is applied in the manufacturing field of ceramic sandblasting nozzles, can solve the problems of difficult to form small flow channels with relatively large length and diameter, complicated sandblasting nozzle technology, and high production costs, and achieve the best spraying effect Ideal, low cost, high production efficiency effect

Inactive Publication Date: 2011-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a silicon carbide ceramic sandblasting nozzle for the problems of complex process, high production cost, low effici

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0010] Specific embodiment 1: The powder injection molding method of a silicon carbide ceramic sandblasting nozzle in this embodiment is as follows: 1. Put the silicon carbide ceramic powder into a mixer and heat it to 100℃~260℃, and then add the binder Mix for 2h-6h, then granulate on the extruder to get the feed; 2. Put the feed in the injection molding machine, and then set the barrel temperature at 120℃~250℃, the injection molding machine sandblast nozzle temperature Inject into the mold for injection molding under the conditions of 100℃~240℃ and injection molding machine injection pressure of 20MPa~200MPa to obtain an injection blank; 3. Place the injection blank in a thermal debinding furnace and heat it from 20℃ to 450℃~ 550℃, then heat preservation and debinding for 36h~58h, then heat up to 800℃~1300℃ for pre-sintering for 2h~4h, take it out after cooling in the furnace to obtain a billet; or make a billet by debinding the injection billet through solvent; 4. Place the b...

Example Embodiment

[0011] Specific embodiment two: this embodiment is different from specific embodiment one in step one, the silicon carbide ceramic powder is replaced by silicon carbide ceramic powder added with sintering aid, wherein the addition amount of sintering aid is sintering aid and silicon carbide 0.1%~5% of the total mass of ceramic powder, sintering aid is B 4 C, C, B, Al, AlN, Al 3 N 4 And Al 4 C 3 One or a combination of several of them. Others are the same as the first embodiment.

[0012] When the sintering aid described in this embodiment is a composition, there is an arbitrary ratio among the components.

Example Embodiment

[0013] Specific embodiment three: This embodiment is different from specific embodiment one in that the silicon carbide ceramic powder in step one is replaced by silicon carbide composite ceramic powder, wherein the silicon carbide composite ceramic powder is replaced by B 4 One or a combination of C, WC and TiC is composed of SiC, wherein SiC accounts for 80% to 99% of the total mass of the silicon carbide composite ceramic powder. Others are the same as the first embodiment.

[0014] The silicon carbide composite ceramic powder in this embodiment is made of B 4 When several combinations of C, WC and TiC are combined with SiC, the B 4 C, WC and TiC have an arbitrary ratio among the components.

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Abstract

The invention discloses a powder injection molding method for a silicon carbide ceramic sand-blasting nozzle, relating to a method for manufacturing a ceramic sand-blasting nozzle and solving the problems that the existing method for manufacturing the sand-blasting nozzle has a complicated process, high production cost, low efficiency, and difficulty in molding a micro-runner with a draw ratio. The method comprises the steps as follows: 1. preparing a feed; 2. preparing injection blanks; 3. preparing blanks; and 4. placing the blanks in a sintering furnace for sintering, grinding and polishing, thus obtaining the silicon carbide ceramic sand-blasting nozzle. The silicon carbide ceramic sand-blasting nozzle manufactured in the invention has good wear resistance, the compactness can reach over 98 percent through tests, the pore path of the sand-blasting nozzle is small and has the diameter of 0.5-3.0mm, the internal smoothness of the pore path is good, the blasting effect is ideal, the draw ratio can achieve (50-150): 1, the production efficiency is high and the cost is low. The method is applicable to manufacturing pure-carbonization silicon carbide adding additives, and silicon carbide composite sand-blasting nozzles with low cost in bulk.

Description

technical field [0001] The invention relates to a manufacturing method of a ceramic sandblasting nozzle. Background technique [0002] At present, the materials for making sandblasting nozzles at home and abroad include metal, hard alloy and ceramics. The hardness of metal and cemented carbide is low, resulting in poor wear resistance and high wear rate, requiring frequent replacement of sandblasting nozzles, which greatly increases the consumption of metal materials and rare precious metal materials. At the same time, the diameter of the sandblasting nozzle increases rapidly, which increases the amount of abrasive, reduces the speed of compressed air and abrasive, increases the cost of abrasive, and greatly increases the labor intensity of operators. Under the same conditions, the life of the steel sandblasting nozzle is not as good as that of the cemented carbide sandblasting nozzle, and the life of the cemented carbide sandblasting nozzle is not as good as that of the ce...

Claims

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Application Information

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IPC IPC(8): B28B1/24
Inventor 卢振蒋少松张凯锋王长瑞
Owner HARBIN INST OF TECH
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