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Dry powder extrusion method

An extrusion method and dry powder technology, applied in the field of extrusion, can solve problems such as size and pressure fluctuations, and achieve the effect of less equipment investment and short mixing time

Inactive Publication Date: 2010-08-18
南昌硬质合金有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a dry powder extrusion method, which solves the size and pressure fluctuations caused by the appearance and particle size fluctuations of each batch of ball milled WC mixture.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add wc87.8kg and co5.28kg mixture, paraffin 4kg, oleic acid amide 0.6kg into the mixer, mix for 30 minutes under the condition of 50 degrees heat preservation, then unload the material, crush and sieve, and then put it in the roller sieve Add 1 kg of gasoline and mix for 5 minutes, and finally put it into an extruder to extrude. The sieve and extrusion residue can be reused after crushing without affecting the product performance. The paraffin wax is composed of high melting point paraffin and low melting point paraffin, the weight ratio is 1:1.2, the melting point of high melting point paraffin is 58 degrees, and the melting point of low melting point paraffin is 45 degrees.

Embodiment 2

[0012] Add 70.24 kg of wc and 5.28 kg of co, 3.2 kg of paraffin wax, and 0.48 kg of oleic acid amide into the mixer, mix for 10 minutes at 30 degrees, then unload the material, crush and sieve it, and then add it to the drum Mix 0.8 kg of gasoline for 3 minutes, and finally put it into an extruder to extrude. The sieve and extrusion residue can be reused after crushing without affecting product performance. The paraffin wax is composed of high melting point paraffin and low melting point paraffin, the weight ratio is 1:1.2, the melting point of high melting point paraffin is 58 degrees, and the melting point of low melting point paraffin is 45 degrees.

Embodiment 3

[0014] Put 5.36 kg of wc and 7.92 kg of co into the mixer, add 4.8 kg of paraffin, and 0.72 kg of oleic acid amide into the mixer, mix for 50 minutes at 70 degrees, then unload the material, crush and sieve it, and then add it to the drum 1.2 kg of gasoline is mixed for 10 minutes, and finally put into an extruder to extrude. The oversize and extrusion residue can be reused after crushing without affecting product performance. The paraffin wax is composed of high melting point paraffin and low melting point paraffin, the weight ratio is 1:1.2, the melting point of high melting point paraffin is 58 degrees, and the melting point of low melting point paraffin is 45 degrees.

[0015] Extrusion parameters: The optimum extrusion pressure and speed range are determined based on a large amount of data.

[0016] Product diameter size (mm)

[0017] Specific equipment: mixing machine, dry powder extrusion machine.

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PUM

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Abstract

The invention discloses a dry powder extrusion method which is characterized by comprising the following steps: (1) making up a formula which is composed of the following components in parts by weight: 70.24-105.36 parts of wc, 5.28-7.92 parts of co, 3.20-4.80 parts of paraffin, 0.48-0.72 part of oleamide and 0.80-1.20 parts of gasoline; (2) adding the mixture of wc and co, paraffin and oleamide into a mixer according to the formula amount, mixing for 10-50 minutes at the temperature of 30-70 DEG, discharging material, breaking, screening, adding gasoline in a roller according to the prescription amount to be mixed for 3-10 minutes, and finally putting into an extruder to be extruded. The invention has the advantages that: 1. granularity fluctuation brings size and pressure fluctuation; 2. because the technology of the invention has small solvent dosage and the solvent has great volatility, the product drying time is extremely short, and large-size bar stock is laid aside for 2-3 hours to be sent into a furnace to dewax; and 3. the mixing time is short.

Description

technical field [0001] The invention relates to an extrusion method, in particular to a dry powder extrusion method. Background technique [0002] At present, there are two extrusion methods of dry powder and mud ball in the extrusion of cemented carbide profiles in China, but from the market prospect, due to the two core factors of mixing stability and material connection method, dry powder extrusion will gradually replace mud ball Extrusion dominates the market. The annual demand for cemented carbide extrusion profiles in China will reach 5000T, while the domestic dry powder extrusion process is still in the primary promotion stage, so the market prospect is broad. Contents of the invention [0003] The purpose of the present invention is to provide a dry powder extrusion method, which solves the size and pressure fluctuations caused by the appearance and particle size fluctuations of each batch of ball-milled WC mixture. [0004] The present invention is realized like...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C29/08
Inventor 张宇奇龚珉
Owner 南昌硬质合金有限责任公司