CN103242590B - Blended particles technique moulded by One-step production wood - Google Patents
Blended particles technique moulded by One-step production wood Download PDFInfo
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Abstract
The invention discloses a kind of One-step production wood and mould blended particles technique, it is characterized in that, frictional heat is first utilized to carry out drying to wood powder, then drop into plastics and at high temperature become semi-melting state, wood powder is wherein dispersed, then be broken into particulate state with the cutting knife rapidly rotated, smash while cool, filter out qualified wood finally by screen cloth and mould blended particles.One-step production of the present invention wood is moulded blended particles technique and is moulded prilling process with traditional wood and compare, and tool has the following advantages: 1. wood powder is dry, mixing moulded by wood, granulation three segment process one step completes, and easily is automated; 2. equipment investment is few, floor space is little, and cost of investment is low; 3. save energy; 4. plastics are semi-melting state in granulation process, can not produce excessive degradation.
Description
Technical field
The invention belongs to a kind of material preparation technology, be specifically related to a kind of preparation method of wood plastics composite particulate material.
Background technology
In daily life, timber and plastics are two kinds of very common starting material, and timber has good texture and workability, and plastics are while having fine intensity, toughness, wet fastness, and the complete processing of plastics is more various compared with timber.China is the relatively deficient country of a resource, and in recent years, country increases protection to the Nonrenewable resources such as forest, oil, and along with the develop rapidly of society, also increase the demand of these two kinds of materials, thus material imbalance between supply and demand highlights day by day thereupon.
Intermingling material moulded by wood is a kind of novel synthetic material be born in recent years.Wood-plastic material can be made into outdoor tables and chairs, rubbish container, door-window section bar, guardrail, wrapping material, household articles, auto parts machinery etc.Wood is moulded intermingling material and is mixed by powdery xylon or vegetable fibre (being referred to as wood powder below), thermoplastics, additive.Wood is moulded intermingling material and is had corrosion resistant, moth-resistant, water-fast, not yielding, intensity high; In complete processing, sheet material that intermingling material makes moulded by wood, wire rod is suitable for conventional various wood working means, and blended particles material moulded by wood can carry out thermoplastic molding's processing as plastics, and thus it has merged the advantage of timber and plastics.In addition, wood-plastic products raw material sources is extensive, and wood powder can take from wood leftover material or other plant fiber, and plastics can recycle waste and old recycled plastic.Further, wood-plastic products itself also recyclable regeneration.Can find out, Wood-plastic material is the wood substitute material of a kind of economy, environmental protection, and it has great significance to protecting the limited forest reserves, protection of the environment, waste and old resource recovery.
At present, existing wood-plastic products manufacturing process comprises following flow process:
(1) wood powder is independent dry; (2) dried wood powder and plastics mix in mixing machine; (3) compound is dropped into screw extrusion press extruding pelletization; (4) wood is moulded particle and join forcing machine or injection moulding machine processing end article.
There is following shortcoming in above-mentioned manufacturing process: (1) each workshop section is separated, and complex steps, not easily realizes automatic production; (2) equipment investment is more, and floor space is large, and cost of investment is high; (3) energy consumption is too high; (4) through twice thaw process, (step 3 and step 4) produce degraded to plastics, affect end product quality.
Summary of the invention
The object of this invention is to provide a kind of wood powder is dry, mixing moulded by wood, blended particles making method is moulded in the wood that a step completes by granulation three workshop sections.
For achieving the above object, present invention employs following technical scheme:
Blended particles technique moulded by a kind of One-step production wood, it is characterized in that, comprise the following steps:
Step one: wood powder is dry, and dropped in mixing machine by wood powder and remove steam by frictional heat, dried wood powder water content drops to less than 2%;
Step 2: drop into plastics, plastics mix with wood powder, and make plastics become semi-melting state by heating, and wood powder is dispersed in the plastics of semi-melting state;
Step 3: particle, the wood of semi-melting state is moulded cooling limit, compound limit and is broken into particulate state by the cutting knife of high speed rotating;
Step 4: screening, moulds composite grain with the wood that screen cloth filters out in qualified particle size range.
As optimization, the concrete steps of described step one are: start high-speed mixer, the rotating speed of mixing machine are maintained 600 to 800RPM; Open heating system for oil simultaneously, mixing machine pot body is heated; Wood powder is dropped into when temperature-stable is at technological temperature, wood powder produces strong friction with the stirring rake of mixing machine and pot body in the mixing machine of high speed rotating, because friction generates heat, and under the outside heat effect of pot body, in wood powder, contained humidity starts evaporation, the water vapour of evaporation is discharged through dehumidifying exhaust system, wood powder thus obtain drying; Drying process continues 10 ~ 15 minutes, and dried wood powder water content drops to less than 2%.
The setting of described technological temperature can adjust according to actual production process particular case, does not limit.
As optimization, the concrete steps of described step 2 are: after wood powder drying completes, in the mixing machine still run up, drop into plastics, and plastics and wood powder start mixing; Plastics kind can be polyolefin pellets or PVC powder; Due to the acting in conjunction of frictional heat and external heat, temperature starts to rise, and after temperature arrives the second-order transition temperature of plastics, plastics start to produce half melting state; The resistance of mixing machine increases simultaneously, and mixing machine electric current sharply increases.
As optimization, the concrete steps of described step 3 are: by monitoring the current of electric of high-speed mixer, when occurring that electric current sharply increases, the blow-off valve of high-speed mixer can be opened, now the plastics of semi-melting and dispersed wood powder are wherein discharged in cooling mixing Material disintegrator with bulk, the semi-melting wood of heat moulds compound when touching cold mixing machine pot body, begin to cool down hardening, wood is moulded compound and is mixed further under the stirring rake effect of cooling mixing Material disintegrator, meanwhile, the cutting knife unit be arranged on cooling mixing Material disintegrator pot body starts to start and high speed rotating, wood hardening is gradually moulded compound and is broken into particulate state.
As optimization, the concrete steps of described step 4 for: through the particle process described in the step 3 of 5 to 10 minutes, become granular wood to mould compound and release from cooling mixing Material disintegrator, and after the screen cloth of the discharge port being arranged on cooling mixing Material disintegrator, pick out qualified wood and mould particle and collect.
Optimize as a supplement, described qualified wood moulds the particle size range of particle at 1 to 4 millimeters, is greater than the particle of 4 millimeters, will stay continuation cutting knife in cooling mixing Material disintegrator broken, is collected until be less than after particle diameter is less than 4 millimeters by screen cloth discharge again.
Optimize as a supplement, drop into wood powder in high-speed mixer while, drop into activator.Described activator is xylidine
Optimize as a supplement, while dropping into plastics, drop into stablizer, fire retardant, coupling agent and lubricant
Described stablizer is Zinic stearas;
Described fire retardant is eight bromo ether or hexabromocyclododecane;
Described coupling agent is silane, titanic acid ester or phosphoric acid ester;
Described lubricant is paraffin, stearic acid and its esters.
Above-mentioned high-speed mixer mainly comprises the pot body of vertical band interlayer tubbiness, and thermostable heat-conductive oil is housed inside pot interlayer body.The outside of interlayer, can electrified regulation pot body with resistive heating circle.Pot nside is equipped with vertical main shaft, main shaft is provided with paddle whipping appts.4 pole asynchronous motors drive main shaft high speed rotating by belt pulley.High-speed mixer bottom of pot body has a lot of aperture, the pressurized air of access can be blown in pot body, thus be taken away by the steam evaporated in wood powder.
Above-mentioned cooling mixing Material disintegrator mainly comprises the pot body of a vertical band interlayer tubbiness, logical water coolant in pot interlayer body, moulds compound for cooling the semi-melting wood of discharging from high-speed mixer.In pot body, some cutting knifes are installed.Cutting knife is by being arranged on the external electric motor Direct driver of pot thus high speed rotating.Cutting knife is flat blade shape.In pot body, vertical main shaft is installed, main shaft is provided with paddle whipping appts.The wood of semi-melting can be moulded compound and constantly deliver to cutting knife annex by this whipping appts, thus completes particle process.The discharge port of cooling mixing Material disintegrator is equipped with screen cloth.
Above-mentioned high-speed mixer is connected with pipeline by operated pneumatic valve with cooling Material disintegrator.
Invention advantage:
One-step production of the present invention wood is moulded blended particles technique and is moulded prilling process with traditional wood and compare, and tool has the following advantages:
1. wood powder is dry, mixing moulded by wood, granulation three segment process one step completes, and easily is automated;
2. equipment investment is few, floor space is little, and cost of investment is low;
3. save energy;
4. plastics are semi-melting state in granulation process, can not produce excessive degradation.
Accompanying drawing explanation
Fig. 1 is preparation method's process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing and a preferred embodiment, technical scheme of the present invention is further described.
As shown in Figure 1:
Blended particles technique moulded by a kind of One-step production wood, comprises the following steps:
Step one: start high-speed mixer, maintains 600 to 800RPM by the rotating speed of mixing machine; Open heating system for oil simultaneously, mixing machine pot body is heated; 100-200 object wood powder 40-80 part is dropped into when temperature-stable is at technological temperature, xylidine selected by activator, wood powder produces strong friction with the stirring rake of mixing machine and pot body in the mixing machine of high speed rotating, because friction generates heat, and under the outside heat effect of pot body, in wood powder, contained humidity starts evaporation, and the water vapour of evaporation is discharged through dehumidifying exhaust system, wood powder thus obtain drying; Drying process continues 10 ~ 15 minutes, and dried wood powder water content drops to less than 2%.
Step 2: after wood powder drying completes, in the mixing machine still run up, drop into PP particulate material 50-100 part, Zinic stearas selected by stablizer; Eight bromo ether selected by fire retardant; Silane selected by coupling agent; Paraffin selected by lubricant, and PP particle and wood powder start mixing; Due to the acting in conjunction of frictional heat and external heat, temperature starts to rise, and after temperature arrives the second-order transition temperature of PP, PP starts to produce half melting state; The resistance of mixing machine increases simultaneously, and mixing machine electric current sharply increases.
Step 3: by monitoring the current of electric of high-speed mixer, when occurring that electric current sharply increases, now temperature reaches 120-130 DEG C, the blow-off valve of high-speed mixer can be opened, now the PP of semi-melting and dispersed wood powder are wherein discharged in cooling mixing Material disintegrator with bulk, the semi-melting wood of heat moulds compound when touching cold mixing machine pot body, begin to cool down hardening, wood is moulded compound and is mixed further under the stirring rake effect of cooling mixing Material disintegrator, meanwhile, the cutting knife unit be arranged on cooling mixing Material disintegrator pot body starts to start and high speed rotating, wood hardening is gradually moulded compound and is broken into particulate state.
Step 4: through the particle process described in the step 3 of 5 to 10 minutes, now temperature drops to less than 45 DEG C, become granular wood to mould compound and release from cooling mixing Material disintegrator, and after the screen cloth of the discharge port being arranged on cooling mixing Material disintegrator, pick out qualified wood and mould particle and collect.
Described qualified wood moulds the particle size range of particle at 1 to 4 millimeters, is greater than the particle of 4 millimeters, will stay continuation cutting knife in cooling mixing Material disintegrator broken, is collected until be less than after particle diameter is less than 4 millimeters by screen cloth discharge again.
It is to be noted; as described above is only the preferred embodiment explaining the present invention; not attempt does any restriction in form to the present invention according to this; be with; all any modification or changes having the relevant the present invention that does under identical invention spirit, all must be included in the category that the invention is intended to protection.
Claims (7)
1. a blended particles technique moulded by One-step production wood, it is characterized in that, comprises the following steps:
Step one: wood powder is dry, and dropped in high-speed mixer by wood powder and remove steam by frictional heat, dried wood powder water content drops to less than 2%;
Step 2: drop into plastics, plastics mix with wood powder, and make plastics become semi-melting state by heating, and wood powder is dispersed in the plastics of semi-melting state;
Step 3: particle, the wood of semi-melting state is moulded cooling limit, compound limit and is broken into particulate state by the cutting knife of high speed rotating;
Step 4: screening, moulds composite grain with the wood that screen cloth filters out in qualified particle size range;
The concrete steps of described step 3 are: by monitoring the current of electric of high-speed mixer, when occurring that electric current sharply increases, the blow-off valve of high-speed mixer is opened, now the plastics of semi-melting and dispersed wood powder are wherein discharged in cooling mixing Material disintegrator with bulk, the semi-melting wood of heat moulds compound when touching cold mixing machine pot body, begin to cool down hardening, wood is moulded compound and is mixed further under the stirring rake effect of cooling mixing Material disintegrator, meanwhile, the cutting knife unit be arranged on cooling mixing Material disintegrator pot body starts to start and high speed rotating, wood hardening is gradually moulded compound and is broken into particulate state.
2. blended particles technique moulded by One-step production wood according to claim 1, it is characterized in that, the concrete steps of described step one are: start high-speed mixer, the rotating speed of mixing machine maintained 600 to 800RPM; Open heating system for oil simultaneously, mixing machine pot body is heated; Wood powder is dropped into when temperature-stable is at technological temperature, wood powder produces strong friction with the stirring rake of mixing machine and pot body in the mixing machine of high speed rotating, because friction generates heat, and under the outside heat effect of pot body, in wood powder, contained humidity starts evaporation, the water vapour of evaporation is discharged through dehumidifying exhaust system, wood powder thus obtain drying; Drying process continues 10 ~ 15 minutes, and dried wood powder water content drops to less than 2%.
3. blended particles technique moulded by One-step production wood according to claim 1, it is characterized in that, the concrete steps of described step 2 are: after wood powder drying completes, in the mixing machine still run up, drop into plastics, and plastics and wood powder start mixing; Plastics kind is polyolefin pellets or PVC powder; Due to the acting in conjunction of frictional heat and external heat, temperature starts to rise, and after temperature arrives the second-order transition temperature of plastics, plastics start to produce half melting state; The resistance of mixing machine increases simultaneously, and mixing machine electric current sharply increases.
4. blended particles technique moulded by One-step production wood according to claim 1, it is characterized in that, the concrete steps of described step 4 for: through the particle process described in the step 3 of 5 to 10 minutes, become granular wood to mould compound and release from cooling mixing Material disintegrator, and after the screen cloth of the discharge port being arranged on cooling mixing Material disintegrator, pick out qualified wood and mould particle and collect.
5. blended particles technique moulded by One-step production wood according to claim 4, it is characterized in that, described qualified wood moulds the particle size range of particle at 1 to 4 millimeters, the particle being greater than 4 millimeters will stay continuation cutting knife fragmentation in cooling mixing Material disintegrator, collect until particle diameter is discharged by screen cloth after being less than 4 millimeters again.
6. blended particles technique moulded by One-step production wood according to claim 2, it is characterized in that, drops into activator while dropping into wood powder in high-speed mixer.
7. blended particles technique moulded by One-step production wood according to claim 3, it is characterized in that, drops into stablizer, fire retardant, coupling agent and lubricant while dropping into plastics.
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| CN108237610A (en) * | 2016-12-24 | 2018-07-03 | 周永固 | A kind of manufacture craft of environmental protection wood-plastic clad plate |
| CN107141635A (en) * | 2017-05-10 | 2017-09-08 | 蚌埠市嘉实机电设备制造有限公司 | A kind of processing method of the shock resistance PVC wood plastic composite section bar of door and window |
| CN108381857A (en) * | 2018-02-13 | 2018-08-10 | 李督 | A kind of novel double-shot moulding device |
| CN110343396A (en) * | 2019-06-27 | 2019-10-18 | 南京捷纳思新材料有限公司 | One-step method response type wood moulding extruded stock and preparation and application |
| CN111805863A (en) * | 2020-07-08 | 2020-10-23 | 吉林庭然景观材料科技有限公司 | Manufacturing method and application of cooling fence plate material |
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| CN101921491A (en) * | 2010-08-23 | 2010-12-22 | 东莞市启原实业有限公司 | Wood plastic composite material |
| CN102658608A (en) * | 2012-05-23 | 2012-09-12 | 游瑞生 | Wood-plastic particle production process method and production system thereof |
| CN102702645A (en) * | 2012-06-07 | 2012-10-03 | 天津聚贤达科技有限公司 | PVC (Polyvinyl Chloride) base wood-plastic composite material for improving aging performance and preparation method thereof |
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| CN1482166A (en) * | 2002-12-23 | 2004-03-17 | 北京欧尼克环保技术有限公司 | Wood plastic composite material and method for producing the same, method for producing panel and sheet made of wood plastic composite |
| CN101921491A (en) * | 2010-08-23 | 2010-12-22 | 东莞市启原实业有限公司 | Wood plastic composite material |
| CN102658608A (en) * | 2012-05-23 | 2012-09-12 | 游瑞生 | Wood-plastic particle production process method and production system thereof |
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Owner name: MECHWELL (KUNSHAN) MACHINERY CO., LTD. Free format text: FORMER OWNER: SUZHOU MECHWELL CHEMICAL MACHINERY CO., LTD. Effective date: 20150906 |
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Effective date of registration: 20150906 Address after: Suzhou City, Jiangsu province 215000 Kunshan United Road Qiandeng Town East Patentee after: Mechwell (Kunshan) Machinery Co., Ltd. Address before: 215000, Zhenxing Road, Zhangjiagang Economic Development Zone, Jiangsu, Suzhou 6, China Patentee before: Suzhou Mechwell Chemical Machinery Co., Ltd. |