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PA-12/glass bead (GB) composite for selective laser sintering (SLS) 3D printing
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A composite material and 3D printing technology, applied in the direction of additive processing, can solve problems such as poor tensile strength, bending strength and other properties, and achieve the effects of improving mechanical strength, reducing warpage and reducing shrinkage.
Inactive Publication Date: 2018-03-27
HEILONGJIANG XINDA ENTERPRISE GRP
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Problems solved by technology
[0004] However, due to the poor tensile strength and bending strength of PA12, for functional parts with high performance requirements, PA12 needs to be further improved in terms of strength, modulus, and heat distortion temperature.
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Embodiment 1
[0022] A PA12 / glass microspherecomposite material for selective laser sintering 3D printing, prepared from the following raw materials in parts by weight: 100 parts of glass microspheres, 900 parts of PA12 raw materials, 5 parts of flow aid, 8 parts of antioxidant, 5 parts of coupling agent; Its concrete preparation method step is:
[0023] Step 1: Prepare glass beads, PA12 raw materials, flow aids, antioxidants, and coupling agents, and dry each raw material for later use, so that the moisture content of each raw material is less than 0.05%;
[0024] Step 2: Weigh 100 parts of glass microspheres, 900 parts of PA12 raw material, 5 parts of flow aid, 8 parts of antioxidant, and 5 parts of coupling agent according to parts by weight;
[0025] Step 3: Add the glass beads weighed in step 2 into the high mixer, then add the PA12, antioxidant, and coupling agent weighed in step 2 and continue mixing for 3 minutes;
[0026] Step 4: Use a twin-screw extruder to granulate the mixture...
Embodiment 2
[0031] A PA12 / glass microspherecomposite material for selective laser sintering 3D printing, prepared from the following raw materials in parts by weight: 200 parts of glass microspheres, 800 parts of PA12 raw materials, 5 parts of flow aid, 8 parts of antioxidant, 8 parts of coupling agent; Its concrete preparation method step is:
[0032] Step 1: Prepare glass beads, PA12 raw materials, flow aids, antioxidants, and coupling agents, and dry each raw material for later use, so that the moisture content of each raw material is less than 0.05%;
[0033] Step 2: Weigh 200 parts of glass beads, 800 parts of PA12 raw material, 5 parts of flow aid, 8 parts of antioxidant, and 8 parts of coupling agent according to parts by weight;
[0034] Step 3: Add the glass beads weighed in step 2 into the high-mixer, then add the PA12, antioxidant, and coupling agent weighed in step 2 and mix for 3 minutes;
[0035] Step 4: Use a twin-screw extruder to granulate the mixture obtained in step 3...
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Abstract
The invention especially relates to a PA-12 / GB composite powder for SLS 3D printing and a preparation method thereof, belonging to the technical field of SLS 3D printing. The PA-12 / GB composite powderfor SLS 3D printing is prepared from the following raw materials by weight: 100 to 300 parts of glass beads, 700 to 900 parts of a PA12 raw material, 0 to 15 parts of a light absorber, 0 to 10 partsof a flowing aid, 5 to 10 parts of an anti-oxidant and 0 to 20 parts of a coupling agent. According to the invention, the PA12 raw material and the glass beads are subjected to physical blending, extrusion modification and freeze grinding so as to prepare the PA-12 / GB composite powder for SLS 3D printing; through addition of accessory materials for modification, material cost can be effectively reduced, and the mechanical properties of the material can be effectively improved; so the tensile strength and bending strength of a printed product are improved, warping produced in printing can be reduced, and the material is especially applicable to the field of SLS 3D printing.
Description
technical field [0001] The invention belongs to the technical field of SLS 3D printing, and in particular relates to a PA12 / glass microspherecomposite materialpowder for selective laser sintering 3D printing and a preparation method thereof. Background technique [0002] Selective Laser Sintering (SLS) rapid prototyping technology uses the principle of sintering powder materials under laserirradiation, and builds up layers under computer control. This technology can be used to form parts of almost any geometric shape, including molds of various complex shapes required in industrial production; the technology can be applied to a very wide range of materials, including polymers, ceramics, metals and various composite materials Wait. 3D printers can manufacture many items, such as airplanes, pistols, food, human organs, children's toys, etc. 3D printing technology is a major breakthrough in the world's manufacturing technology field in the past 20 years. It is an integrati...
Claims
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Application Information
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