Preparation method of powder injection molded feeding material
A technology of powder injection molding and powder, which is applied in the field of powder injection molding feed preparation, can solve the problems of increasing labor intensity of workers, low equipment utilization rate, long process time, etc., and achieves short preparation process cycle, high equipment utilization rate, The effect of simple process
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[0019] The present invention provides a method for preparing powder injection molding feed, which includes the following steps:
[0020] S1. The organic high molecular polymer as the binder component is pulverized to the same particle size level as the inorganic material powder to be mixed. For example, ultra-low temperature pulverization can be used, such as pulverization below -50°C.
[0021] S2. Heating the inorganic material powder to a predetermined temperature, where the predetermined temperature is a temperature capable of melting the binder;
[0022] S3. Add the binder processed in step S1 to the powder raw material that has reached the predetermined temperature and mix, so that the powder raw material and the binder are pre-agglomerated, wherein the binder includes the powder processed in step S1 Of organic polymers;
[0023] S4. The material processed in step S3 is fed into an extruder, plasticized, extruded, and pelletized to obtain a powder injection molding feed.
[0024]...
Example Embodiment
[0036] Example 1
[0037] This embodiment provides a method for preparing stainless steel powder injection molding feed, which belongs to the field of metal powder injection molding. The specific process is as follows:
[0038] 1) Provide stainless steel powder to be mixed, the stainless steel powder used is obtained by, for example, a hydrometallurgical chemical engineering method, and the particle size is approximately 0.5-3 μm;
[0039] 2) Provide binder raw materials: copolyformaldehyde, modified K resin, fully refined paraffin wax, polypropylene wax, polyacrylamide, antioxidant, and perform ultra-low temperature below -50℃ for copolyformaldehyde and modified K resin. Deeply crushed, crushed to a particle size below 80μm, which is at the same particle size level as the stainless steel powder;
[0040] 3) Take 10% of fully refined paraffin wax, 1.5% polypropylene wax, 1% polyacrylamide, 0.5% antioxidant, and process 2) processed polyformaldehyde 80%, modified K resin 7.5%, mix As ...
Example Embodiment
[0044] Example 2
[0045] This embodiment provides a method for preparing cermet powder injection molding feed, which belongs to the field of metal injection molding, where the cermet may be a titanium carbonitride-based cermet, for example: TiCN-(5-15)% (W-Ta / Nb-V / Cr)C-(10~30)%Co / Ni, the specific process is as follows:
[0046] 1) Provide cermet powder with a particle size of 0.5-3μm, to be mixed;
[0047] 2) Provide binder raw materials: polyoxymethylene copolymer, modified K resin, fully refined paraffin wax, polypropylene wax, polyacrylamide, and antioxidant. The values of polyoxymethylene copolymer and modified K are respectively subjected to ultra-low temperature below -50℃ Deeply pulverized, pulverized to below 80μm, at the same particle size level as the cermet powder;
[0048] 3) Take 10% of fully refined paraffin wax, 1% polypropylene wax, 1% polyacrylamide, 0.5% antioxidant, and process 2) treated copolyformaldehyde 77.5%, modified K resin 10%, mix As a binder, the cop...
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