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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 efficiency, and difficulty in forming a small flow channel with a relatively large length and diameter when manufacturing the sandblasting nozzle in the existing method. powder injection molding method

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[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 the mixer and heat it to 100°C-260°C, and then add the binder Mix for 2 hours to 6 hours, and then granulate on the extruder to obtain the feeding material; 2. Put the feeding material in the injection molding machine, and then put the material into the injection molding machine at a temperature of 120 ° C to 250 ° C and the temperature of the sandblasting nozzle of the injection molding machine. 100 ℃ ~ 240 ℃, injection molding machine injection pressure of 20MPa ~ 200MPa into the mold for injection molding, to get the injection blank; 3. Put the injection blank in a thermal degreasing furnace and heat it from 20 ℃ to 450 ℃ ~ 550°C, then keep warm and degrease for 36h~58h, then heat up to 800°C~1300°C for pre-sintering for 2h~4h, take it out after cooling with the furnace, and get the...

specific Embodiment approach 2

[0011] Embodiment 2: The silicon carbide ceramic powder described in step 1, which is different from Embodiment 1 in this embodiment, is replaced by silicon carbide ceramic powder with sintering aids added, wherein the amount of sintering aids added is sintering aids and silicon carbide 0.1% to 5% of the total mass of ceramic powder, the 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 in the first embodiment.

[0012] When the sintering aid described in this embodiment is a composition, the ratio between the respective components is arbitrary.

specific Embodiment approach 3

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

[0014] The silicon carbide composite ceramic powder described in this embodiment is composed of B 4 When several compositions of C, WC and TiC are combined with SiC, the B 4 The composition of C, WC and TiC is in any 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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