CN102634211A - Rice hull-hot melt adhesive composite powder for selective laser sintering and preparation method thereof - Google Patents
Rice hull-hot melt adhesive composite powder for selective laser sintering and preparation method thereof Download PDFInfo
- Publication number
- CN102634211A CN102634211A CN2012101441568A CN201210144156A CN102634211A CN 102634211 A CN102634211 A CN 102634211A CN 2012101441568 A CN2012101441568 A CN 2012101441568A CN 201210144156 A CN201210144156 A CN 201210144156A CN 102634211 A CN102634211 A CN 102634211A
- Authority
- CN
- China
- Prior art keywords
- powder
- melt adhesive
- hot melt
- rice husk
- drying treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 402
- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 282
- 235000009566 rice Nutrition 0.000 title claims abstract description 282
- 239000004831 Hot glue Substances 0.000 title claims abstract description 205
- 238000000110 selective laser sintering Methods 0.000 title claims abstract description 95
- 239000002131 composite material Substances 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 240000007594 Oryza sativa Species 0.000 title 1
- 241000209094 Oryza Species 0.000 claims abstract description 281
- 239000010903 husk Substances 0.000 claims abstract description 194
- 238000001035 drying Methods 0.000 claims abstract description 137
- 239000007822 coupling agent Substances 0.000 claims abstract description 58
- 239000003999 initiator Substances 0.000 claims abstract description 57
- 239000012766 organic filler Substances 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 19
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 52
- -1 photostabilizer Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 29
- 239000004743 Polypropylene Substances 0.000 claims description 17
- 229920001155 polypropylene Polymers 0.000 claims description 17
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 239000002994 raw material Substances 0.000 abstract description 26
- 229920001587 Wood-plastic composite Polymers 0.000 abstract description 23
- 239000011155 wood-plastic composite Substances 0.000 abstract description 23
- 238000012986 modification Methods 0.000 abstract description 12
- 230000004048 modification Effects 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000004611 light stabiliser Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 37
- 230000035939 shock Effects 0.000 description 32
- 238000002474 experimental method Methods 0.000 description 25
- 230000003746 surface roughness Effects 0.000 description 24
- 239000011159 matrix material Substances 0.000 description 17
- 238000005452 bending Methods 0.000 description 16
- 238000012545 processing Methods 0.000 description 14
- 230000035882 stress Effects 0.000 description 9
- 239000002023 wood Substances 0.000 description 9
- 238000000149 argon plasma sintering Methods 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 8
- 238000005187 foaming Methods 0.000 description 8
- 238000005286 illumination Methods 0.000 description 8
- 238000001782 photodegradation Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000643 oven drying Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
选择性激光烧结用稻壳热熔胶复合粉及其制备方法，它涉及一种选择性激光烧结复合粉及其制备方法。本发明选择稻壳粉作为选择性激光烧结复合粉主要原料，可以大幅降低木塑复合材料的生产成本，而且本发明选择性激光烧结用稻壳热熔胶复合粉在制备过程中不必对稻壳粉进行大量的改性，不仅降低了生产成本，而且在保证木塑复合材料各项性能的同时，简化了工艺。选择性激光烧结用稻壳热熔胶复合粉由热熔胶粉末、经干燥处理的稻壳粉末、光稳定剂、偶联剂、引发剂和有机填料制成。制备方法：一、稻壳粉干燥；二、制基料；三、高转混合。本发明用于木塑复合材料的制备。The invention relates to a rice husk hot melt adhesive composite powder for selective laser sintering and a preparation method thereof, which relates to a selective laser sintering composite powder and a preparation method thereof. The present invention selects rice husk powder as the main raw material of selective laser sintering composite powder, which can greatly reduce the production cost of wood-plastic composite materials, and the rice husk hot-melt adhesive composite powder for selective laser sintering of the present invention does not need to be processed in the preparation process. A large amount of modification of the powder not only reduces the production cost, but also simplifies the process while ensuring the properties of the wood-plastic composite material. The rice husk hot-melt adhesive composite powder for selective laser sintering is made of hot-melt adhesive powder, dried rice husk powder, light stabilizer, coupling agent, initiator and organic filler. Preparation method: 1. drying rice husk powder; 2. making base material; 3. mixing at high speed. The invention is used for the preparation of wood-plastic composite materials.
Description
Technical field
The present invention relates to a kind of selective laser sintering composite powder and preparation method thereof.
Background technology
Rice husk is the sub product after the rice processing, and China is again that paddy rice is mainly planted country, so the rice husk source is abundant, has cheap advantage.According to statistical yearbooks in 2011 of China National Bureau of Statistics of China issue, the rice yield of China in 2010 is about 1.95 hundred million tons, has 25% rice husk rate to calculate according to minimum, and the rice husk output of China in 2010 reaches at least 4,875 ten thousand tons.
The method that Traditional use material removing method reaches part shape and precision has thoroughly been overturned in the rapid prototyping manufacturing, adopts brand-new " increasing material " mode job.Rapid prototyping technology provides true visible solid model for shortening New Product's Design assessment cycle to planner, mfr and user, carries out the function test experiment, carries out fast mould manufacturing and part manufacturing fast, and is significant.Rapid prototyping is manufactured on fields such as automobile, aviation, electrical equipment, medical treatment and is used widely.
Selective laser sintering (SLS) is a kind of of rapid prototyping manufacturing; Adopt laser apparatus to make the energy; Its working process is: the 3D solid cad model of at first in computingmachine, setting up part; Carry out slicing treatment with delamination software, obtain the information of each processing aspect, and be converted into electrical signal and control laser scanning system.The even very thin work material powder of layer overlay on worktable; Laser beam carries out sintering according to part layering profile selectively under computer control; By the work material powder smelting of laser beam irradiation and in process of cooling subsequently, bond together, just accomplished the processing of an aspect; Successively spread powder, successively scan sintering, the processing up to accomplishing last one deck produces three-dimensional entity model.All sintering remove the excessive processing material powder after intact, polish, subsequent disposal such as oven dry just obtains component again.This technology have the work material range of choice extensively, excess stock is easy to cleaning, advantages of wide application range, is applicable to the manufacturing of prototype and function part.
But because rice husk is surperficial jagged, extremely rough, be easy to generate jam, bridging between particle, mobile poor, belong to and be difficult for the fluidizing medium, and moisture is big in the rice husk, low molecule organic matter is many, thus cause its poor heat stability, and have water absorbability.Therefore, think that rice husk and powdered rice hulls are not suitable for selective laser sintering, perhaps can only add as auxiliary material.For example; " PVC/ powdered rice hulls composite structure and performance study " (Wuhan University of Technology; Application Doctor of engineering academic dissertation, postgraduate Hu Shengfei, instructor Chen Wen) select rice husk to use in the literary composition as selective laser sintering composite powder auxiliary material; And carry out the microwave induced modification of MMA for the water absorbability that reduces rice husk, simultaneously to also powdered rice hulls having been carried out the performance that a series of modification improves its each side.
Summary of the invention
The present invention selects powdered rice hulls as selective laser sintering composite powder main raw material; Can significantly reduce the production cost of wood plastic composite; And selective laser sintering of the present invention needn't carry out a large amount of modifications with rice husk hot melt adhesive composite powder to powdered rice hulls in the preparation process; Not only reduce production cost, and when guaranteeing wood plastic composite each item performance, simplified technology.
Selective laser sintering with rice husk hot melt adhesive composite powder by the hot melt adhesive powder, process through rice husk powder, photostabilizer, coupling agent, initiator and the organic filler of drying treatment; Wherein the hot melt adhesive powder is 5～3: 1 with weight ratio through the rice husk powder of drying treatment; Coupling agent be the hot melt adhesive powder with through 1%～5% of the rice husk powder total mass of drying treatment; Initiator be the hot melt adhesive powder with through 0.1%～2% of the rice husk powder total mass of drying treatment; Organic filler be the hot melt adhesive powder with through 2%～20% of the rice husk powder total mass of drying treatment, photostabilizer be the hot melt adhesive powder with through 0.2%～6% of the rice husk powder total mass of drying treatment; Organic filler is polypropylene powder or polyethylene powders.
Above-mentioned selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps: one, powdered rice hulls heat drying treatment; With powdered rice hulls under 140 ℃ of conditions dry 5 hours; And every separated 2h stirs once in the drying process, promptly obtains the rice husk powder through drying treatment; Two, will mix through the rice husk powder and the hot melt adhesive powder of drying treatment by hot melt adhesive powder and weight ratio through the rice husk powder 5～3: 1 of drying treatment; The acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into; Continue to stir, obtain base-material; Three, base-material is dried in 45 ± 2 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 2%～20% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 0.2%～6% of drying treatment; And be to mix under 720～1440r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 1%～5%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 0.1%～2% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is polypropylene powder or polyethylene powders in the step 3.
The present invention prepare selective laser sintering with in the step 1 of rice husk hot melt adhesive composite powder to the powdered rice hulls property advanced heat drying treatment; Thereby evaporative removal moisture in the rice husk; Concurrent first portion thermal destruction; The low material of thermostability is removed, formed more inner vesicular structure, adsorptivity (or water absorbability) obviously increases.Therefore; After the acetone soln that step 2 is dissolved with coupling agent and initiator is poured into; The vesicular structure of powdered rice hulls can adsorb more coupling agents and initiator, and acetone then volatilizees in the oven drying at low temperature process, and coupling agent and initiator are retained in the vesicular structure of powdered rice hulls; And then in selective laser sintering process, make coupling agent and initiator and powdered rice hulls, hot melt adhesive powder generation chemical reaction, not only shutoff the vesicular structure of powdered rice hulls, reduced wood and moulded the water absorbability that meets material; More strengthen interfacial bond power, improved the mechanical property of institute's job; And use that selective laser sintering of the present invention uses that the relative warpage rate of rice husk hot melt adhesive composite powder institute job is 0.24%～0.40%, surperficial roughness as Ra less than 0.01mm.
The present invention sneaks into organic filler and photostabilizer after preparing the step 3 oven drying at low temperature of selective laser sintering with rice husk hot melt adhesive composite powder again, carries out mixed at high speed, has played and has mixed and the surperficial effect of polishing powdered rice hulls; Under the situation of not using viscosity-depression agent; Still can guarantee in " pushing away powder " (or be called " shop powder ") process powder mix evenly, adhesion assembles, the uniform in thickness of shop powder has reduced the roughness on relative warpage rate, internal stress and the surface of component; Under external impacts, be difficult for rupturing; Have safety in utilization, and profiled member receives to be difficult for oxidative degradation after the uviolizing, improved the mechanical property of its processing parts.
Selective laser sintering of the present invention has cheap, safe in utilization with rice husk hot melt adhesive composite powder, prepare easy advantage.
Embodiment
Technical scheme of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: this embodiment selective laser sintering with rice husk hot melt adhesive composite powder by the hot melt adhesive powder, process through rice husk powder, photostabilizer, coupling agent, initiator and the organic filler of drying treatment; Wherein the hot melt adhesive powder is 5～3: 1 with weight ratio through the rice husk powder of drying treatment; Coupling agent be the hot melt adhesive powder with through 1%～5% of the rice husk powder total mass of drying treatment; Initiator be the hot melt adhesive powder with through 0.1%～2% of the rice husk powder total mass of drying treatment; Organic filler be the hot melt adhesive powder with through 2%～20% of the rice husk powder total mass of drying treatment, photostabilizer be the hot melt adhesive powder with through 0.2%～6% of the rice husk powder total mass of drying treatment; Organic filler is polypropylene powder or polyethylene powders.
Rice husk is a kind of have certain toughness, porousness, the coarse polymer natural organic of low density and quality; Have the real density height and (be about 720kg/m
3) advantage, can significantly promote part machinery intensity.
The powdered rice hulls extexine is cellular, shape such as sand dune.See that from the transverse section appearance is corrugated.This structure of powdered rice hulls will increase contact surface greatly in making the wood plastic composite process.Powdered rice hulls inside is a kind of short texture, has a large amount of holes to exist.Inside mainly is made up of fiber, vascular and parenchyma, and the extexine of powdered rice hulls is lignifying, and inside and internal skin are non-lignifying.
Select for use this embodiment selective laser sintering to be merely 20%～26% of PVC/ powdered rice hulls matrix material with the cost of the prepared wood plastic composite of rice husk hot melt adhesive composite powder.
Photostabilizer is Ultraviolet Absorber UV-P, UV light absorber UV531, UV light absorber UV327, photostabilizer GW-540 or photostabilizer 744 in this embodiment.Carbonyl can serve as chromophoric group (aging initiator) has booster action to organic filler aging, causes composite material surface to fade, and makes the surface form the strong aged thin layer of one deck, and produces large-area embrittlement.The adding of photostabilizer can slow down aging, improves the use aesthetic property and the work-ing life of institute's job.
The adding of organic filler improves the biodurable and the weathering resistance of institute's job in this embodiment, but exceeding this embodiment institute restricted portion can increase fragility.
Embodiment two: the difference of this embodiment and embodiment one is: the hot melt adhesive powder is 4.5～3.5: 1 with weight ratio through the rice husk powder of drying treatment.Other is identical with embodiment one.
Embodiment three: this embodiment and embodiment one or two difference are: the hot melt adhesive powder is 4: 1 with weight ratio through the rice husk powder of drying treatment.Other is identical with embodiment one or two.
Embodiment four: this embodiment with embodiment one, two or three difference is: coupling agent is maleic anhydride or maleic anhydride inoculated polypropylene.Other is identical with embodiment one, two or three.
Embodiment five: this embodiment with the difference of one of embodiment one to four is: initiator is a Di Cumyl Peroxide 99.Other is identical with one of embodiment one to four.
The adding of coupling agent can also improve the interface compatibility of powdered rice hulls and organic filler; Coupling agent and Di Cumyl Peroxide 99 (DCP) are dissolved in acetone, can disperse reagent, and utilize the water absorbability of powdered rice hulls to increase contact area, reaction area.
Embodiment six: this embodiment with the difference of one of embodiment one to five is: the hot melt adhesive powder is PES hot melt adhesive powder or EVA hot melt adhesive powder.Other is identical with one of embodiment one to five.
Embodiment seven: the difference of one of this embodiment and embodiment one to six is: the hot melt adhesive powder, through the granularity of the rice husk powder of drying treatment and organic filler all less than 180 μ m.Other is identical with one of embodiment one to six.
Embodiment eight: this embodiment selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps: one, powdered rice hulls heat drying treatment; With powdered rice hulls under 140 ℃ of conditions dry 5 hours; And every separated 2h stirs once in the drying process, promptly obtains the rice husk powder through drying treatment; Two, will mix through the rice husk powder and the hot melt adhesive powder of drying treatment by hot melt adhesive powder and weight ratio through the rice husk powder 5～3: 1 of drying treatment; The acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into; Continue to stir, obtain base-material; Three, base-material is dried in 45 ± 2 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 2%～20% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 0.2%～6% of drying treatment; And be to mix under 720～1440r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 1%～5%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 0.1%～2% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is polypropylene powder or polyethylene powders in the step 3.
Though belonging to, powdered rice hulls is difficult for the fluidizing medium; But the powdered rice hulls outside surface is coated with slick, cornified silicon dioxide film; Formed a kind of nonpolar surface structure; So the silicon dioxide film of powdered rice hulls outside surface has played the effect of lubricant in selective laser sintering process, make the part of producing more closely knit, structure is tightr.
This embodiment has utilized the water absorbability of powdered rice hulls just, with having improved the performance index of selective laser sintering with rice husk hot melt adhesive composite powder.
Acetone in this embodiment step 2 can satisfy the needs of used coupling agent of dissolving and initiator, and reduces the time of drying of step 3 as much as possible.
Photostabilizer in this embodiment step 3 is Ultraviolet Absorber UV-P, UV light absorber UV531, UV light absorber UV327, photostabilizer GW-540 or photostabilizer 744.
Embodiment nine: the difference of this embodiment and embodiment eight is: the hot melt adhesive powder is 4.5～3.5: 1 with weight ratio through the rice husk powder of drying treatment in the step 2.Other step and parameter are identical with embodiment eight.
Embodiment ten: the difference of this embodiment and embodiment eight is: the hot melt adhesive powder is 4: 1 with weight ratio through the rice husk powder of drying treatment in the step 2.Other step and parameter are identical with embodiment eight.
Embodiment 11: this embodiment with embodiment eight, nine or ten difference is: coupling agent is maleic anhydride or maleic anhydride inoculated polypropylene in the step 2.Other step and parameter are identical with embodiment eight, nine or ten.
Embodiment 12: this embodiment with the difference of one of embodiment eight to 11 is: initiator is a Di Cumyl Peroxide 99 in the step 2.Other step and parameter are identical with one of embodiment eight to 11.
Embodiment 13: this embodiment with the difference of one of embodiment eight to 12 is: the hot melt adhesive powder is PES hot melt adhesive powder or EVA hot melt adhesive powder in the step 2.Other step and parameter are identical with one of embodiment eight to 12.
Embodiment 14: the difference of one of this embodiment and embodiment eight to 13 is: the hot melt adhesive powder, through the granularity of the rice husk powder of drying treatment and organic filler all less than 180 μ m.Other step and parameter are identical with one of embodiment eight to 13.
Embodiment 1
Selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps:
One, powdered rice hulls heat drying treatment with powdered rice hulls under 140 ℃ of conditions dry 5 hours, and whenever in the drying process is stirred once at a distance from 2h, promptly obtains the rice husk powder through drying treatment; Two, by the hot melt adhesive powder with will mix through the rice husk powder and the hot melt adhesive powder of drying treatment through 3: 1 the weight ratio of rice husk powder of drying treatment, the acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into, continues to stir, and obtains base-material; Three, base-material is dried in 45 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 4% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer (Ultraviolet Absorber UV-P) through the rice husk powder total mass 0.3% of drying treatment; And be to mix under the 720r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 2%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 1.8% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is a polypropylene powder in the step 3; Initiator is a Di Cumyl Peroxide 99 in the step 2; Coupling agent is a maleic anhydride in the step 2; The hot melt adhesive powder is a PES hot melt adhesive powder in the step 2; The hot melt adhesive powder, be 100～120 μ m through the rice husk powder of drying treatment and the granularity of organic filler.
Compare experiment:
Divide 3 groups to compare experiment, the 1st group with this embodiment selective laser sintering with rice husk hot melt adhesive composite powder as the selective laser sintering rapid forming raw materials technology; The 2nd group with wood powder and the direct powder mix of hot melt adhesive powder as the selective laser sintering rapid forming raw materials technology; The 3rd group prepares the raw material of the foaming material shaped technology of PVC/ powdered rice hulls with PVC/ powdered rice hulls matrix material as extrusion molding, and wherein powdered rice hulls is 40 parts, carries out modification (" PVC/ powdered rice hulls composite structure and performance study ") with MMA.Laser sintering rapid forming equipment adopts the HPRS-III rapidform machine of the Central China University of Science and Technology.
The condition that processing is the most suitable: adopt the subregion scan mode; Laser output power is 30～50W, and the rate travel of scan laser light beam is 1800mm/s～2000mm/s, and the characteristic radius of laser facula is 0.3mm; The laser beam sweep span is 0.15mm, and lift height is 0.1～0.2mm.
Contrast and experiment: the relative warpage rate of the 1st group of prepared product is that the relative warpage rate of 0.28%, the 2 group of prepared product is that the relative warpage rate of 0.89%, the 3 group of prepared product is 0.75%.Explain that the product that this embodiment adopts selective laser sintering to prepare with rice husk hot melt adhesive composite powder has better Forming Quality.
The powder mix gathering that evenly, do not stick together in the 1st group of " pushing away powder " process, thus the thickness of shop powder evenly, unified, reduce so guaranteed the equilibrium of internal stress, surfaceness; Under illumination condition, be difficult for taking place photodegradation, stability is strong, and has improved each item mechanical index of the product of preparing (component); Wherein tensile strength on average can reach 0.15MPa; Shock strength on average can reach 1.495 kilojoules/square metre, flexural strength on average can reach 0.37MPa, the 2nd group of product of preparing (component) tensile strength is 0.014MPa; Shock strength be 0.567 kilojoule/square metre, flexural strength is 0.475MPa.The mechanical property that the prepared component that go out of the Wood-plastic composite powder of selecting for use this embodiment to be used for selective laser sintering rapid forming are described obviously is superior to the 2nd group.The 3rd group of product of preparing (component) tensile strength is 18.7MPa, shock strength be 5.27 kilojoules/square metre, bending elastic modulus 1536MPa.
Can further improve each item mechanical index of the 1st group of product of preparing (component) behind the waxdip, tensile strength on average can reach 1.474MPa, shock strength on average can reach 3.739 kilojoules/square metre, bending strength on average can reach 3.86MPa.
The surface roughness Ra of the 1st group of product of preparing (component) is 0.006～0.008mm; The surface roughness Ra of the 2nd group of product of preparing (component) is 0.06～0.094mm, and the surface roughness Ra of the 3rd group of product of preparing (component) is 0.1～0.2mm.
Present embodiment selects for use the laser sintered cost with the prepared wood plastic composite of rice husk hot melt adhesive composite powder of the 1st group selection property to be merely 21% of the 3rd group of PVC/ powdered rice hulls matrix material.
Embodiment 2
Selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps:
One, powdered rice hulls heat drying treatment with powdered rice hulls under 140 ℃ of conditions dry 5 hours, and whenever in the drying process is stirred once at a distance from 2h, promptly obtains the rice husk powder through drying treatment; Two, by the hot melt adhesive powder with will mix through the rice husk powder and the hot melt adhesive powder of drying treatment through 3.5: 1 the weight ratio of rice husk powder of drying treatment, the acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into, continues to stir, and obtains base-material; Three, base-material is dried in 45 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 18% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 5.5% of drying treatment; And be to mix under the 780r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 3%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 1% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is a polyethylene powders in the step 3; Initiator is a Di Cumyl Peroxide 99 in the step 2; Coupling agent is a maleic anhydride inoculated polypropylene in the step 2; The hot melt adhesive powder is an EVA hot melt adhesive powder in the step 2; The hot melt adhesive powder, be 100～120 μ m through the rice husk powder of drying treatment and the granularity of organic filler.
Compare experiment:
Divide 3 groups to compare experiment, the 1st group with this embodiment selective laser sintering with rice husk hot melt adhesive composite powder as the selective laser sintering rapid forming raw materials technology; The 2nd group with wood powder and the direct powder mix of hot melt adhesive powder as the selective laser sintering rapid forming raw materials technology; The 3rd group prepares the raw material of the foaming material shaped technology of PVC/ powdered rice hulls with PVC/ powdered rice hulls matrix material as extrusion molding, and wherein powdered rice hulls is 40 parts, carries out modification (" PVC/ powdered rice hulls composite structure and performance study ") with MMA.Laser sintering rapid forming equipment adopts the HPRS-III rapidform machine of the Central China University of Science and Technology.
The condition that processing is the most suitable: adopt the subregion scan mode; Laser output power is 30～50W, and the rate travel of scan laser light beam is 1800mm/s～2000mm/s, and the characteristic radius of laser facula is 0.3mm; The laser beam sweep span is 0.15mm, and lift height is 0.1～0.2mm.
Contrast and experiment: the relative warpage rate of the 1st group of prepared product is that the relative warpage rate of 0.29%, the 2 group of prepared product is that the relative warpage rate of 0.89%, the 3 group of prepared product is 0.75%.Explain that the product that this embodiment adopts selective laser sintering to prepare with rice husk hot melt adhesive composite powder has better Forming Quality.
The powder mix gathering that evenly, do not stick together in the 1st group of " pushing away powder " process, thus the thickness of shop powder evenly, unified, reduce so guaranteed the equilibrium of internal stress, surfaceness; Under illumination condition, be difficult for taking place photodegradation, stability is strong, and has improved each item mechanical index of the product of preparing (component); Wherein tensile strength on average can reach 0.16MPa; Shock strength on average can reach 1.501 kilojoules/square metre, flexural strength on average can reach 0.36MPa, the 2nd group of product of preparing (component) tensile strength is 0.014MPa; Shock strength be 0.567 kilojoule/square metre, flexural strength is 0.475MPa.The mechanical property that the prepared component that go out of the Wood-plastic composite powder of selecting for use this embodiment to be used for selective laser sintering rapid forming are described obviously is superior to the 2nd group.The 3rd group of product of preparing (component) tensile strength is 18.7MPa, shock strength be 5.27 kilojoules/square metre, bending elastic modulus 1536MPa.
Can further improve each item mechanical index of the 1st group of product of preparing (component) behind the waxdip, tensile strength on average can reach 1.533MPa, shock strength on average can reach 3.846 kilojoules/square metre, bending strength on average can reach 4.27MPa.
The surface roughness Ra of the 1st group of product of preparing (component) is 0.006～0.008mm; The surface roughness Ra of the 2nd group of product of preparing (component) is 0.06～0.094mm, and the surface roughness Ra of the 3rd group of product of preparing (component) is 0.1～0.2mm.
Present embodiment selects for use the laser sintered cost with the prepared wood plastic composite of rice husk hot melt adhesive composite powder of the 1st group selection property to be merely 23% of the 3rd group of PVC/ powdered rice hulls matrix material.
Embodiment 3
Selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps:
One, powdered rice hulls heat drying treatment with powdered rice hulls under 140 ℃ of conditions dry 5 hours, and whenever in the drying process is stirred once at a distance from 2h, promptly obtains the rice husk powder through drying treatment; Two, by the hot melt adhesive powder with will mix through the rice husk powder and the hot melt adhesive powder of drying treatment through 4: 1 the weight ratio of rice husk powder of drying treatment, the acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into, continues to stir, and obtains base-material; Three, base-material is dried in 45 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 17% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 3% of drying treatment; And be to mix under the 840r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 2%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 1.8% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is a polypropylene powder in the step 3; Initiator is a Di Cumyl Peroxide 99 in the step 2; Coupling agent is a maleic anhydride inoculated polypropylene in the step 2; The hot melt adhesive powder is a PES hot melt adhesive powder in the step 2; The hot melt adhesive powder, be 100～120 μ m through the rice husk powder of drying treatment and the granularity of organic filler.
Compare experiment:
Divide 3 groups to compare experiment, the 1st group with this embodiment selective laser sintering with rice husk hot melt adhesive composite powder as the selective laser sintering rapid forming raw materials technology; The 2nd group with wood powder and the direct powder mix of hot melt adhesive powder as the selective laser sintering rapid forming raw materials technology; The 3rd group prepares the raw material of the foaming material shaped technology of PVC/ powdered rice hulls with PVC/ powdered rice hulls matrix material as extrusion molding, and wherein powdered rice hulls is 40 parts, carries out modification (" PVC/ powdered rice hulls composite structure and performance study ") with MMA.Laser sintering rapid forming equipment adopts the HPRS-III rapidform machine of the Central China University of Science and Technology.
The condition that processing is the most suitable: adopt the subregion scan mode; Laser output power is 30～50W, and the rate travel of scan laser light beam is 1800mm/s～2000mm/s, and the characteristic radius of laser facula is 0.3mm; The laser beam sweep span is 0.15mm, and lift height is 0.1～0.2mm.
Contrast and experiment: the relative warpage rate of the 1st group of prepared product is that the relative warpage rate of 0.37%, the 2 group of prepared product is that the relative warpage rate of 0.89%, the 3 group of prepared product is 0.75%.Explain that the product that this embodiment adopts selective laser sintering to prepare with rice husk hot melt adhesive composite powder has better Forming Quality.
The powder mix gathering that evenly, do not stick together in the 1st group of " pushing away powder " process, thus the thickness of shop powder evenly, unified, reduce so guaranteed the equilibrium of internal stress, surfaceness; Under illumination condition, be difficult for taking place photodegradation, stability is strong, and has improved each item mechanical index of the product of preparing (component); Wherein tensile strength on average can reach 0.153MPa; Shock strength on average can reach 1.489 kilojoules/square metre, flexural strength on average can reach 0.39MPa, the 2nd group of product of preparing (component) tensile strength is 0.014MPa; Shock strength be 0.567 kilojoule/square metre, flexural strength is 0.475MPa.The mechanical property that the prepared component that go out of the Wood-plastic composite powder of selecting for use this embodiment to be used for selective laser sintering rapid forming are described obviously is superior to the 2nd group.The 3rd group of product of preparing (component) tensile strength is 18.7MPa, shock strength be 5.27 kilojoules/square metre, bending elastic modulus 1536MPa.
Can further improve each item mechanical index of the 1st group of product of preparing (component) behind the waxdip, tensile strength on average can reach 1.624MPa, shock strength on average can reach 3.715 kilojoules/square metre, bending strength on average can reach 3.95MPa.
The surface roughness Ra of the 1st group of product of preparing (component) is 0.006～0.008mm; The surface roughness Ra of the 2nd group of product of preparing (component) is 0.06～0.094mm, and the surface roughness Ra of the 3rd group of product of preparing (component) is 0.1～0.2mm.
Present embodiment selects for use the laser sintered cost with the prepared wood plastic composite of rice husk hot melt adhesive composite powder of the 1st group selection property to be merely 23% of the 3rd group of PVC/ powdered rice hulls matrix material.
Embodiment 4
Selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps:
One, powdered rice hulls heat drying treatment with powdered rice hulls under 140 ℃ of conditions dry 5 hours, and whenever in the drying process is stirred once at a distance from 2h, promptly obtains the rice husk powder through drying treatment; Two, by the hot melt adhesive powder with will mix through the rice husk powder and the hot melt adhesive powder of drying treatment through 5: 1 the weight ratio of rice husk powder of drying treatment, the acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into, continues to stir, and obtains base-material; Three, base-material is dried in 45 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 20% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 6% of drying treatment; And be to mix under the 1440r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 5%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 2% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is a polypropylene powder in the step 3; Initiator is a Di Cumyl Peroxide 99 in the step 2; Coupling agent is a maleic anhydride inoculated polypropylene in the step 2; The hot melt adhesive powder is an EVA hot melt adhesive powder in the step 2; The hot melt adhesive powder, be 100～120 μ m through the rice husk powder of drying treatment and the granularity of organic filler.
Compare experiment:
Divide 3 groups to compare experiment, the 1st group with this embodiment selective laser sintering with rice husk hot melt adhesive composite powder as the selective laser sintering rapid forming raw materials technology; The 2nd group with wood powder and the direct powder mix of hot melt adhesive powder as the selective laser sintering rapid forming raw materials technology; The 3rd group prepares the raw material of the foaming material shaped technology of PVC/ powdered rice hulls with PVC/ powdered rice hulls matrix material as extrusion molding, and wherein powdered rice hulls is 40 parts, carries out modification (" PVC/ powdered rice hulls composite structure and performance study ") with MMA.Laser sintering rapid forming equipment adopts the HPRS-III rapidform machine of the Central China University of Science and Technology.
The condition that processing is the most suitable: adopt the subregion scan mode; Laser output power is 30～50W, and the rate travel of scan laser light beam is 1800mm/s～2000mm/s, and the characteristic radius of laser facula is 0.3mm; The laser beam sweep span is 0.15mm, and lift height is 0.1～0.2mm.
Contrast and experiment: the relative warpage rate of the 1st group of prepared product is that the relative warpage rate of 0.25%, the 2 group of prepared product is that the relative warpage rate of 0.89%, the 3 group of prepared product is 0.75%.Explain that the product that this embodiment adopts selective laser sintering to prepare with rice husk hot melt adhesive composite powder has better Forming Quality.
The powder mix gathering that evenly, do not stick together in the 1st group of " pushing away powder " process, thus the thickness of shop powder evenly, unified, reduce so guaranteed the equilibrium of internal stress, surfaceness; Under illumination condition, be difficult for taking place photodegradation, stability is strong, and has improved each item mechanical index of the product of preparing (component); Wherein tensile strength on average can reach 0.162MPa; Shock strength on average can reach 1.537 kilojoules/square metre, flexural strength on average can reach 0.384MPa, the 2nd group of product of preparing (component) tensile strength is 0.014MPa; Shock strength be 0.567 kilojoule/square metre, flexural strength is 0.475MPa.The mechanical property that the prepared component that go out of the Wood-plastic composite powder of selecting for use this embodiment to be used for selective laser sintering rapid forming are described obviously is superior to the 2nd group.The 3rd group of product of preparing (component) tensile strength is 18.7MPa, shock strength be 5.27 kilojoules/square metre, bending elastic modulus 1536MPa.
Can further improve each item mechanical index of the 1st group of product of preparing (component) behind the waxdip, tensile strength on average can reach 1.634MPa, shock strength on average can reach 3.802 kilojoules/square metre, bending strength on average can reach 3.98MPa.
The surface roughness Ra of the 1st group of product of preparing (component) is 0.005～0.007mm; The surface roughness Ra of the 2nd group of product of preparing (component) is 0.06～0.094mm, and the surface roughness Ra of the 3rd group of product of preparing (component) is 0.1～0.2mm.
Present embodiment selects for use the laser sintered cost with the prepared wood plastic composite of rice husk hot melt adhesive composite powder of the 1st group selection property to be merely 26% of the 3rd group of PVC/ powdered rice hulls matrix material.
Embodiment 5
Selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps:
One, powdered rice hulls heat drying treatment with powdered rice hulls under 140 ℃ of conditions dry 5 hours, and whenever in the drying process is stirred once at a distance from 2h, promptly obtains the rice husk powder through drying treatment; Two, by the hot melt adhesive powder with will mix through the rice husk powder and the hot melt adhesive powder of drying treatment through 4.5: 1 the weight ratio of rice husk powder of drying treatment, the acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into, continues to stir, and obtains base-material; Three, base-material is dried in 45 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 15% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 2% of drying treatment; And be to mix under the 1200r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 3.5%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 1.5% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is a polyethylene powders in the step 3; Initiator is a Di Cumyl Peroxide 99 in the step 2; Coupling agent is a maleic anhydride inoculated polypropylene in the step 2; The hot melt adhesive powder is a PES hot melt adhesive powder in the step 2; The hot melt adhesive powder, be 100～120 μ m through the rice husk powder of drying treatment and the granularity of organic filler.
Compare experiment:
Divide 3 groups to compare experiment, the 1st group with this embodiment selective laser sintering with rice husk hot melt adhesive composite powder as the selective laser sintering rapid forming raw materials technology; The 2nd group with wood powder and the direct powder mix of hot melt adhesive powder as the selective laser sintering rapid forming raw materials technology; The 3rd group prepares the raw material of the foaming material shaped technology of PVC/ powdered rice hulls with PVC/ powdered rice hulls matrix material as extrusion molding, and wherein powdered rice hulls is 40 parts, carries out modification (" PVC/ powdered rice hulls composite structure and performance study ") with MMA.Laser sintering rapid forming equipment adopts the HPRS-III rapidform machine of the Central China University of Science and Technology.
The condition that processing is the most suitable: adopt the subregion scan mode; Laser output power is 30～50W, and the rate travel of scan laser light beam is 1800mm/s～2000mm/s, and the characteristic radius of laser facula is 0.3mm; The laser beam sweep span is 0.15mm, and lift height is 0.1～0.2mm.
Contrast and experiment: the relative warpage rate of the 1st group of prepared product is that the relative warpage rate of 0.34%, the 2 group of prepared product is that the relative warpage rate of 0.89%, the 3 group of prepared product is 0.75%.Explain that the product that this embodiment adopts selective laser sintering to prepare with rice husk hot melt adhesive composite powder has better Forming Quality.
The powder mix gathering that evenly, do not stick together in the 1st group of " pushing away powder " process, thus the thickness of shop powder evenly, unified, reduce so guaranteed the equilibrium of internal stress, surfaceness; Under illumination condition, be difficult for taking place photodegradation, stability is strong, and has improved each item mechanical index of the product of preparing (component); Wherein tensile strength on average can reach 0.171MPa; Shock strength on average can reach 1.514 kilojoules/square metre, flexural strength on average can reach 0.381MPa, the 2nd group of product of preparing (component) tensile strength is 0.014MPa; Shock strength be 0.567 kilojoule/square metre, flexural strength is 0.475MPa.The mechanical property that the prepared component that go out of the Wood-plastic composite powder of selecting for use this embodiment to be used for selective laser sintering rapid forming are described obviously is superior to the 2nd group.The 3rd group of product of preparing (component) tensile strength is 18.7MPa, shock strength be 5.27 kilojoules/square metre, bending elastic modulus 1536MPa.
Can further improve each item mechanical index of the 1st group of product of preparing (component) behind the waxdip, tensile strength on average can reach 1.534MPa, shock strength on average can reach 3.906 kilojoules/square metre, bending strength on average can reach 3.94MPa.
The surface roughness Ra of the 1st group of product of preparing (component) is 0.006～0.007mm; The surface roughness Ra of the 2nd group of product of preparing (component) is 0.06～0.094mm, and the surface roughness Ra of the 3rd group of product of preparing (component) is 0.1～0.2mm.
Present embodiment selects for use the laser sintered cost with the prepared wood plastic composite of rice husk hot melt adhesive composite powder of the 1st group selection property to be merely 23% of the 3rd group of PVC/ powdered rice hulls matrix material.
Embodiment 6
Selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps:
One, powdered rice hulls heat drying treatment with powdered rice hulls under 140 ℃ of conditions dry 5 hours, and whenever in the drying process is stirred once at a distance from 2h, promptly obtains the rice husk powder through drying treatment; Two, by the hot melt adhesive powder with will mix through the rice husk powder and the hot melt adhesive powder of drying treatment through 4: 1 the weight ratio of rice husk powder of drying treatment, the acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into, continues to stir, and obtains base-material; Three, base-material is dried in 45 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 10% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 5% of drying treatment; And be to mix under the 960r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 2%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 0.8% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is a polyethylene powders in the step 3; Initiator is a Di Cumyl Peroxide 99 in the step 2; Coupling agent is a maleic anhydride in the step 2; The hot melt adhesive powder is a PES hot melt adhesive powder in the step 2; The hot melt adhesive powder, be 100～120 μ m through the rice husk powder of drying treatment and the granularity of organic filler.
Compare experiment:
Divide 3 groups to compare experiment, the 1st group with this embodiment selective laser sintering with rice husk hot melt adhesive composite powder as the selective laser sintering rapid forming raw materials technology; The 2nd group with wood powder and the direct powder mix of hot melt adhesive powder as the selective laser sintering rapid forming raw materials technology; The 3rd group prepares the raw material of the foaming material shaped technology of PVC/ powdered rice hulls with PVC/ powdered rice hulls matrix material as extrusion molding, and wherein powdered rice hulls is 40 parts, carries out modification (" PVC/ powdered rice hulls composite structure and performance study ") with MMA.Laser sintering rapid forming equipment adopts the HPRS-III rapidform machine of the Central China University of Science and Technology.
The condition that processing is the most suitable: adopt the subregion scan mode; Laser output power is 30～50W, and the rate travel of scan laser light beam is 1800mm/s～2000mm/s, and the characteristic radius of laser facula is 0.3mm; The laser beam sweep span is 0.15mm, and lift height is 0.1～0.2mm.
Contrast and experiment: the relative warpage rate of the 1st group of prepared product is that the relative warpage rate of 0.34%, the 2 group of prepared product is that the relative warpage rate of 0.89%, the 3 group of prepared product is 0.75%.Explain that the product that this embodiment adopts selective laser sintering to prepare with rice husk hot melt adhesive composite powder has better Forming Quality.
The powder mix gathering that evenly, do not stick together in the 1st group of " pushing away powder " process, thus the thickness of shop powder evenly, unified, reduce so guaranteed the equilibrium of internal stress, surfaceness; Under illumination condition, be difficult for taking place photodegradation, stability is strong, and has improved each item mechanical index of the product of preparing (component); Wherein tensile strength on average can reach 0.164MPa; Shock strength on average can reach 1.520 kilojoules/square metre, flexural strength on average can reach 0.387MPa, the 2nd group of product of preparing (component) tensile strength is 0.014MPa; Shock strength be 0.567 kilojoule/square metre, flexural strength is 0.475MPa.The mechanical property that the prepared component that go out of the Wood-plastic composite powder of selecting for use this embodiment to be used for selective laser sintering rapid forming are described obviously is superior to the 2nd group.The 3rd group of product of preparing (component) tensile strength is 18.7MPa, shock strength be 5.27 kilojoules/square metre, bending elastic modulus 1536MPa.
Can further improve each item mechanical index of the 1st group of product of preparing (component) behind the waxdip, tensile strength on average can reach 1.602MPa, shock strength on average can reach 3.842 kilojoules/square metre, bending strength on average can reach 3.865MPa.
The surface roughness Ra of the 1st group of product of preparing (component) is 0.006～0.008mm; The surface roughness Ra of the 2nd group of product of preparing (component) is 0.06～0.094mm, and the surface roughness Ra of the 3rd group of product of preparing (component) is 0.1～0.2mm.
Present embodiment selects for use the laser sintered cost with the prepared wood plastic composite of rice husk hot melt adhesive composite powder of the 1st group selection property to be merely 24% of the 3rd group of PVC/ powdered rice hulls matrix material.
Embodiment 7
Selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps:
One, powdered rice hulls heat drying treatment with powdered rice hulls under 140 ℃ of conditions dry 5 hours, and whenever in the drying process is stirred once at a distance from 2h, promptly obtains the rice husk powder through drying treatment; Two, by the hot melt adhesive powder with will mix through the rice husk powder and the hot melt adhesive powder of drying treatment through 3.5: 1 the weight ratio of rice husk powder of drying treatment, the acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into, continues to stir, and obtains base-material; Three, base-material is dried in 45 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 12% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 3.5% of drying treatment; And be to mix under the 1200r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 4%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 0.5% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is a polyethylene powders in the step 3; Initiator is a Di Cumyl Peroxide 99 in the step 2; Coupling agent is a maleic anhydride in the step 2; The hot melt adhesive powder is an EVA hot melt adhesive powder in the step 2; The hot melt adhesive powder, be 100～120 μ m through the rice husk powder of drying treatment and the granularity of organic filler.
Compare experiment:
Divide 3 groups to compare experiment, the 1st group with this embodiment selective laser sintering with rice husk hot melt adhesive composite powder as the selective laser sintering rapid forming raw materials technology; The 2nd group with wood powder and the direct powder mix of hot melt adhesive powder as the selective laser sintering rapid forming raw materials technology; The 3rd group prepares the raw material of the foaming material shaped technology of PVC/ powdered rice hulls with PVC/ powdered rice hulls matrix material as extrusion molding, and wherein powdered rice hulls is 40 parts, carries out modification (" PVC/ powdered rice hulls composite structure and performance study ") with MMA.Laser sintering rapid forming equipment adopts the HPRS-III rapidform machine of the Central China University of Science and Technology.
The condition that processing is the most suitable: adopt the subregion scan mode; Laser output power is 30～50W, and the rate travel of scan laser light beam is 1800mm/s～2000mm/s, and the characteristic radius of laser facula is 0.3mm; The laser beam sweep span is 0.15mm, and lift height is 0.1～0.2mm.
Contrast and experiment: the relative warpage rate of the 1st group of prepared product is that the relative warpage rate of 0.27%, the 2 group of prepared product is that the relative warpage rate of 0.89%, the 3 group of prepared product is 0.75%.Explain that the product that this embodiment adopts selective laser sintering to prepare with rice husk hot melt adhesive composite powder has better Forming Quality.
The powder mix gathering that evenly, do not stick together in the 1st group of " pushing away powder " process, thus the thickness of shop powder evenly, unified, reduce so guaranteed the equilibrium of internal stress, surfaceness; Under illumination condition, be difficult for taking place photodegradation, stability is strong, and has improved each item mechanical index of the product of preparing (component); Wherein tensile strength on average can reach 0.155MPa; Shock strength on average can reach 1.532 kilojoules/square metre, flexural strength on average can reach 0.384MPa, the 2nd group of product of preparing (component) tensile strength is 0.014MPa; Shock strength be 0.567 kilojoule/square metre, flexural strength is 0.475MPa.The mechanical property that the prepared component that go out of the Wood-plastic composite powder of selecting for use this embodiment to be used for selective laser sintering rapid forming are described obviously is superior to the 2nd group.The 3rd group of product of preparing (component) tensile strength is 18.7MPa, shock strength be 5.27 kilojoules/square metre, bending elastic modulus 1536MPa.
Can further improve each item mechanical index of the 1st group of product of preparing (component) behind the waxdip, tensile strength on average can reach 1.627MPa, shock strength on average can reach 3.831 kilojoules/square metre, bending strength on average can reach 3.87MPa.
The surface roughness Ra of the 1st group of product of preparing (component) is 0.006～0.007mm; The surface roughness Ra of the 2nd group of product of preparing (component) is 0.06～0.094mm, and the surface roughness Ra of the 3rd group of product of preparing (component) is 0.1～0.2mm.
Present embodiment selects for use the laser sintered cost with the prepared wood plastic composite of rice husk hot melt adhesive composite powder of the 1st group selection property to be merely 22% of the 3rd group of PVC/ powdered rice hulls matrix material.
Embodiment 8
Selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps:
One, powdered rice hulls heat drying treatment with powdered rice hulls under 140 ℃ of conditions dry 5 hours, and whenever in the drying process is stirred once at a distance from 2h, promptly obtains the rice husk powder through drying treatment; Two, by the hot melt adhesive powder with will mix through the rice husk powder and the hot melt adhesive powder of drying treatment through 3: 1 the weight ratio of rice husk powder of drying treatment, the acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into, continues to stir, and obtains base-material; Three, base-material is dried in 45 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 9% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 1% of drying treatment; And be to mix under the 1440r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 4%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 1.4% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is a polypropylene powder in the step 3; Initiator is a Di Cumyl Peroxide 99 in the step 2; Coupling agent is a maleic anhydride in the step 2; The hot melt adhesive powder is an EVA hot melt adhesive powder in the step 2; The hot melt adhesive powder, be 100～120 μ m through the rice husk powder of drying treatment and the granularity of organic filler.
Compare experiment:
Divide 3 groups to compare experiment, the 1st group with this embodiment selective laser sintering with rice husk hot melt adhesive composite powder as the selective laser sintering rapid forming raw materials technology; The 2nd group with wood powder and the direct powder mix of hot melt adhesive powder as the selective laser sintering rapid forming raw materials technology; The 3rd group prepares the raw material of the foaming material shaped technology of PVC/ powdered rice hulls with PVC/ powdered rice hulls matrix material as extrusion molding, and wherein powdered rice hulls is 40 parts, carries out modification (" PVC/ powdered rice hulls composite structure and performance study ") with MMA.Laser sintering rapid forming equipment adopts the HPRS-III rapidform machine of the Central China University of Science and Technology.
The condition that processing is the most suitable: adopt the subregion scan mode; Laser output power is 30～50W, and the rate travel of scan laser light beam is 1800mm/s～2000mm/s, and the characteristic radius of laser facula is 0.3mm; The laser beam sweep span is 0.15mm, and lift height is 0.1～0.2mm.
Contrast and experiment: the relative warpage rate of the 1st group of prepared product is that the relative warpage rate of 0.36%, the 2 group of prepared product is that the relative warpage rate of 0.89%, the 3 group of prepared product is 0.75%.Explain that the product that this embodiment adopts selective laser sintering to prepare with rice husk hot melt adhesive composite powder has better Forming Quality.
The powder mix gathering that evenly, do not stick together in the 1st group of " pushing away powder " process, thus the thickness of shop powder evenly, unified, reduce so guaranteed the equilibrium of internal stress, surfaceness; Under illumination condition, be difficult for taking place photodegradation, stability is strong, and has improved each item mechanical index of the product of preparing (component); Wherein tensile strength on average can reach 0.164MPa; Shock strength on average can reach 1.564 kilojoules/square metre, flexural strength on average can reach 0.384MPa, the 2nd group of product of preparing (component) tensile strength is 0.014MPa; Shock strength be 0.567 kilojoule/square metre, flexural strength is 0.475MPa.The mechanical property that the prepared component that go out of the Wood-plastic composite powder of selecting for use this embodiment to be used for selective laser sintering rapid forming are described obviously is superior to the 2nd group.The 3rd group of product of preparing (component) tensile strength is 18.7MPa, shock strength be 5.27 kilojoules/square metre, bending elastic modulus 1536MPa.
Can further improve each item mechanical index of the 1st group of product of preparing (component) behind the waxdip, tensile strength on average can reach 1.673MPa, shock strength on average can reach 3.845 kilojoules/square metre, bending strength on average can reach 3.91MPa.
The surface roughness Ra of the 1st group of product of preparing (component) is 0.005～0.007mm; The surface roughness Ra of the 2nd group of product of preparing (component) is 0.06～0.094mm, and the surface roughness Ra of the 3rd group of product of preparing (component) is 0.1～0.2mm.
Present embodiment selects for use the laser sintered cost with the prepared wood plastic composite of rice husk hot melt adhesive composite powder of the 1st group selection property to be merely 22% of the 3rd group of PVC/ powdered rice hulls matrix material.
Claims (8)
1. selective laser sintering is with rice husk hot melt adhesive composite powder, it is characterized in that selective laser sintering with rice husk hot melt adhesive composite powder by the hot melt adhesive powder, process through rice husk powder, photostabilizer, coupling agent, initiator and the organic filler of drying treatment; Wherein the hot melt adhesive powder is 5～3: 1 with weight ratio through the rice husk powder of drying treatment; Coupling agent be the hot melt adhesive powder with through 1%～5% of the rice husk powder total mass of drying treatment; Initiator be the hot melt adhesive powder with through 0.1%～2% of the rice husk powder total mass of drying treatment; Organic filler be the hot melt adhesive powder with through 2%～20% of the rice husk powder total mass of drying treatment, photostabilizer be the hot melt adhesive powder with through 0.2%～6% of the rice husk powder total mass of drying treatment; Organic filler is polypropylene powder or polyethylene powders.
2. selective laser sintering according to claim 1 is with rice husk hot melt adhesive composite powder, it is characterized in that hot melt adhesive powder and weight ratio through the rice husk powder of drying treatment are 4.5～3.5: 1.
3. selective laser sintering according to claim 1 is with rice husk hot melt adhesive composite powder, it is characterized in that hot melt adhesive powder and weight ratio through the rice husk powder of drying treatment are 4: 1.
According to claim 1,2 or 3 described selective laser sinterings with rice husk hot melt adhesive composite powder, it is characterized in that coupling agent is maleic anhydride or maleic anhydride inoculated polypropylene.
5. selective laser sintering according to claim 4 is characterized in that with rice husk hot melt adhesive composite powder initiator is a Di Cumyl Peroxide 99.
6. selective laser sintering according to claim 5 is characterized in that with rice husk hot melt adhesive composite powder the hot melt adhesive powder is PES hot melt adhesive powder or EVA hot melt adhesive powder.
7. selective laser sintering according to claim 6 is with rice husk hot melt adhesive composite powder, it is characterized in that the hot melt adhesive powder, through the granularity of the rice husk powder of drying treatment and organic filler all less than 180 μ m.
According to claim 1 selective laser sintering with the preparation method of rice husk hot melt adhesive composite powder; It is characterized in that selective laser sintering prepares with the preparation method of rice husk hot melt adhesive composite powder according to the following steps: one, powdered rice hulls heat drying treatment; With powdered rice hulls under 140 ℃ of conditions dry 5 hours; And every separated 2h stirs once in the drying process, promptly obtains the rice husk powder through drying treatment; Two, will mix through the rice husk powder and the hot melt adhesive powder of drying treatment by hot melt adhesive powder and weight ratio through the rice husk powder 5～3: 1 of drying treatment; The acetone soln that will be dissolved with coupling agent and initiator is afterwards poured into; Continue to stir, obtain base-material; Three, base-material is dried in 45 ± 2 ℃ of environment; Then in hot melt adhesive powder and ratio through the rice husk powder total mass 2%～20% of drying treatment add organic filler, by hot melt adhesive powder and ratio adding photostabilizer through the rice husk powder total mass 0.2%～6% of drying treatment; And be to mix under 720～1440r/min condition at rotating speed, promptly obtain selective laser sintering with rice husk hot melt adhesive composite powder; Be the hot melt adhesive powder in coupling agent in the step 2 wherein and rice husk powder total mass 1%～5%, initiator through drying treatment is the hot melt adhesive powder and ratio through the rice husk powder total mass 0.1%～2% of drying treatment is dissolved in acetone with coupling agent and initiator; Organic filler is polypropylene powder or polyethylene powders in the step 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101441568A CN102634211A (en) | 2012-04-27 | 2012-04-27 | Rice hull-hot melt adhesive composite powder for selective laser sintering and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101441568A CN102634211A (en) | 2012-04-27 | 2012-04-27 | Rice hull-hot melt adhesive composite powder for selective laser sintering and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102634211A true CN102634211A (en) | 2012-08-15 |
Family
ID=46618795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101441568A Pending CN102634211A (en) | 2012-04-27 | 2012-04-27 | Rice hull-hot melt adhesive composite powder for selective laser sintering and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102634211A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106589941A (en) * | 2016-03-16 | 2017-04-26 | 东北林业大学 | Glass-fiber-reinforced walnut shell composite powder material for laser sintering 3D printing technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948665A (en) * | 2005-10-10 | 2007-04-18 | 四川自强科技有限公司 | Wood plastic composite material building mould board, its preparation method and use |
| CN101602871A (en) * | 2009-06-30 | 2009-12-16 | 东北林业大学 | Wood-plastic composite powder for selective laser sintering rapid prototyping and preparation method thereof |
| US20100331458A1 (en) * | 2008-02-29 | 2010-12-30 | Jeffrey Jacob Cernohous | Reinforcing additives for composite materials |
| US20110245380A1 (en) * | 2008-01-15 | 2011-10-06 | RheTech, Inc. | Cellulosic inclusion thermoplastic composition and molding thereof |
-
2012
- 2012-04-27 CN CN2012101441568A patent/CN102634211A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948665A (en) * | 2005-10-10 | 2007-04-18 | 四川自强科技有限公司 | Wood plastic composite material building mould board, its preparation method and use |
| US20110245380A1 (en) * | 2008-01-15 | 2011-10-06 | RheTech, Inc. | Cellulosic inclusion thermoplastic composition and molding thereof |
| US20100331458A1 (en) * | 2008-02-29 | 2010-12-30 | Jeffrey Jacob Cernohous | Reinforcing additives for composite materials |
| CN101602871A (en) * | 2009-06-30 | 2009-12-16 | 东北林业大学 | Wood-plastic composite powder for selective laser sintering rapid prototyping and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王清文等: "《木塑复合材料与制品》", 31 January 2007, 化学工业出版社 * |
| 郭艳玲等: "木粉/PES复合粉末选择性激光烧结成形及后处理技术研究", 《电加工与模具》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106589941A (en) * | 2016-03-16 | 2017-04-26 | 东北林业大学 | Glass-fiber-reinforced walnut shell composite powder material for laser sintering 3D printing technology |
| CN106589941B (en) * | 2016-03-16 | 2018-12-25 | 东北林业大学 | Laser sintered 3D printing technique fiberglass reinforced walnut shell composite powder material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101602871B (en) | Wood-plastic composite powder for selective laser sintering rapid forming and preparation method thereof | |
| CN104308072B (en) | Carbon fiber-based precoated sand material for selective laser sintering and preparation method thereof | |
| DE502005005017D1 (en) | Use of polyarylene ether ketone powder in a three-dimensional powder-based tool-less production process, and moldings produced therefrom | |
| CN104045986B (en) | Unsaturated polyester resin composite material for furniture and preparation method thereof | |
| CN103204660A (en) | High-hardness artificial quartz stone plate and production process thereof | |
| CN103980682A (en) | 3D printing polycaprolactone material and preparation method thereof | |
| CN105751409B (en) | A kind of manufacturing method of carbon fibre composite component die | |
| CN106696252B (en) | A kind of manufacturing method of polymer material three-dimensional product | |
| CN102660107B (en) | Post-treatment agent and method for using same to treat eucalyptus/PES (polyether sulfone) composite powder formed part formed by selective laser sintering | |
| CN102952318A (en) | Toughened plastic tray and preparation method thereof | |
| CN102029715A (en) | SLA (stereo lithography) technology of light curing stereo homocentric sphere | |
| CN100352643C (en) | Gypsum base material system for 3-D spraying binding and preparing method therefor | |
| CN108299798A (en) | A kind of 3D room temperature printing pastes and preparation method thereof | |
| CN107200513A (en) | A kind of preparation method of New Building Materials | |
| CN106832885B (en) | Polymer composite material containing polydopamine particles and application thereof | |
| CN107760018A (en) | A kind of selective laser sintering 3D printing composite powders of PA 12 | |
| CN103204658B (en) | High-wear-resistance artificial quartz stone plate and production process thereof | |
| CN102634211A (en) | Rice hull-hot melt adhesive composite powder for selective laser sintering and preparation method thereof | |
| CN106590005A (en) | Plastic-wood composite floor and preparation method thereof | |
| CN101906741A (en) | A kind of wood fiber-unsaturated polyester cross-linked wood-plastic composite material and preparation method thereof | |
| CN102392524B (en) | Production method of polymer nano-floor | |
| CN106278087A (en) | A kind of 3D printed material modified based on Gypsum Fibrosum original washing powder | |
| CN107090189A (en) | A kind of selective laser sintering CNT/Wood-plastic composite powder and preparation method thereof | |
| CN104497343B (en) | A kind of preparation method of Polymethacrylimide micro-foaming material and products thereof | |
| CN105153661A (en) | Negative ion environment-friendly decorative moulding and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120815 |