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Method and device for forming polymer part by compounding microwave and infrared radiation

An infrared radiation, composite forming technology, applied in the field of additive manufacturing, can solve the problems of dimensional accuracy and mechanical properties decline, and achieve the effect of low cost

Inactive Publication Date: 2021-12-03
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method and device for composite forming polymer parts by microwave and infrared radiation. The method combines microwave and infrared radiation to effectively avoid the overall temperature of the powder bed Defects such as dimensional accuracy and mechanical property degradation caused by uneven distribution have realized high-speed, high-precision, high-quality forming of polymer parts

Method used

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  • Method and device for forming polymer part by compounding microwave and infrared radiation
  • Method and device for forming polymer part by compounding microwave and infrared radiation
  • Method and device for forming polymer part by compounding microwave and infrared radiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A method for forming polymer parts by microwave and infrared radiation comprises the following steps:

[0066] S1: Screen out 800 g of thermoplastic polyurethane elastomer powder with an average particle size of 40 μm to 60 μm, 70 g of silicon carbide powder with an average particle size of 5 μm to 10 μm, and 10 g of copper sulfide powder with an average particle size of 400 μm to 600 nm, using mesh sieves with different meshes. The screened powder was put into a ball mill and mechanically mixed for 24 hours to obtain a uniformly mixed polymer powder.

[0067] S2: Lay the mixed powder into a thin layer of 0.05mm, and turn on the preheating infrared radiator and the preheating microwave generator to preheat the powder bed, so that the temperature of the powder bed surface and side wall reaches 100°C-110°C.

[0068] S3: According to the cross-sectional information obtained by the processing model of the computer component, the additive application module selectively applies...

Embodiment 2

[0072] A method for forming polymer parts by microwave and infrared radiation comprises the following steps:

[0073] S1: Using 1000g of polymethyl methacrylate powder, 40g of copper nanoparticles with an average particle size of 600nm-800nm ​​and 10g of polypyrrole powder, a polymer mixed powder with an average particle size of 60nm-80μm was prepared by coprecipitation.

[0074] S2: Lay the mixed powder into a thin layer of 0.2 mm, and turn on the preheating infrared radiator and preheating microwave generator to preheat the powder bed, so that the temperature of the powder bed surface and side wall reaches 90°C to 95°C.

[0075] S3: According to the cross-sectional information obtained by the processing model of the computer component, the auxiliary agent application module selectively applies the liquid matrix with the second radiation absorbing material on the powder bed, wherein the second radiation absorbing material comprises 4% of the auxiliary agent mass fraction Copp...

Embodiment 3

[0079] A method for forming polymer parts by microwave and infrared radiation comprises the following steps:

[0080] S1: Screen out 2000 g of polyamide powder with an average particle size of 70 μm to 100 μm, 5 g of ferric oxide powder with an average particle size of 5 μm to 10 μm, and 5 g of copper sulfide powder with an average particle size of 400 nm to 600 nm using mesh sieves of different meshes. The screened powder was put into a ball mill and mechanically mixed for 24 hours to obtain a homogeneously mixed polymer mixed powder.

[0081] S2: Lay the mixed powder into a thin layer of 0.07mm, and turn on the preheating infrared radiator and the preheating microwave generator to preheat the powder bed, so that the temperature of the powder bed surface and side wall reaches 100°C-110°C.

[0082] S3: According to the cross-sectional information obtained by the processing model of the computer component, the additive application module selectively applies the liquid matrix wi...

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Abstract

The invention belongs to the related technical field of additive manufacturing, and discloses a method and device for forming a polymer part by compounding microwave and infrared radiation. The method comprises the following steps: (1) preheating a powder bed on which premixed polymer powder is laid by adopting microwave and infrared radiation, wherein the premixed polymer powder comprises a polymer material and a first radiation absorbing material, and the first radiation absorbing material comprises a microwave radiation absorbing material; (2) selectively laying a second radiation absorbing material on the powder bed, wherein the second radiation absorbing material comprises an infrared radiation absorbing material or comprises an infrared radiation absorbing material and a microwave radiation absorbing material; (3) carrying out at least one time of radiation on the powder bed by adopting infrared radiation alone or infrared radiation and microwave at the same time so as to sinter the powder bed; and (4) repeating the steps (2)-(3) until the polymer part is manufactured. According to the method and device, high-speed, high-precision and high-quality forming of the polymer part is realized.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and more particularly, relates to a method and a device for composite forming of polymer parts by microwave and infrared radiation. Background technique [0002] Polymers, also known as polymers, plastics, etc., have the advantages of light weight, insulation, low melting point, and easy processing. At present, additive manufacturing technologies suitable for polymers include Fused Deposition Modeling (FDM), Light Curing (Stereo Lithography Apparatus, SLA), Selective Laser Sintering (SLA), Droplet Ejection (Three ~DimensionPrinting, 3DP) and so on. The forming principles and materials used in these technologies are different. Among them, FDM needs to prepare polymer consumables into filaments or granules of a certain diameter, and the forming table is small and the speed is slow, making it difficult to form large-sized parts; SLA forming liquid The photosensitive resin is not mel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/153B29C64/277B29C64/295B29C64/20B33Y10/00B33Y30/00
CPCB29C64/153B29C64/277B29C64/295B29C64/20B33Y10/00B33Y30/00
Inventor 魏青松张净凯李继康毛贻桅赵丹雷
Owner HUAZHONG UNIV OF SCI & TECH