CN1128053C - Extruding-out process and apparatus for plastics-wood sections - Google Patents
Extruding-out process and apparatus for plastics-wood sections Download PDFInfo
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- CN1128053C CN1128053C CN00132561A CN00132561A CN1128053C CN 1128053 C CN1128053 C CN 1128053C CN 00132561 A CN00132561 A CN 00132561A CN 00132561 A CN00132561 A CN 00132561A CN 1128053 C CN1128053 C CN 1128053C
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Abstract
The present invention discloses an extruding-out raw material formula and a technology for plastics-wood section materials and a vacuum heating type dosing feeder. The insufficiency of a traditional formula and a technology is overcome by using the formula and the technology. A process step of elimination of water is completed in the big production flow by adopting the dosing feeder, a secondary drying processing is carried out, and the equipment investment is reduced. Section materials made of the formula and the technology of the present invention can be used for replacing pure wooden packages, cargo trays, construction materials, pipe materials, etc., and products have the advantages of good mechanical property, low price, 100% of regeneration, strong acid base resistance, difficult deformation, complete flame retardancy, etc.
Description
The present invention relates to plastic material extrusion technology field, refer in particular to plastics is base material, dose the string powder, through proportioning, the dehumidifying mixing that heats up, extruder plasticizing, mould molding, cooling and shaping, again through traction, fixed length cutting, various process and the equipment made from plastic-wood section of practical value.
Existing plastic-wood section goods, just with plastics and filler with simple proportioning through general technological method for processing moulding, so its presentation quality, body intensity all can't reach the designing requirement of expection.As the supporter of bearing goods, dead load does not reach 1/4th of design objective, and dynamic loading is subjected to impacting i.e. fracture especially, is saying to a certain degree, has just lost its practical value yet.Tracing it to its cause, is exactly that traditional Recipe and forming method can not satisfy plastic-wood section and require.The present invention has overcome the deficiency of conventional formulation technology and forming method, and through facts have proved, Recipe, forming machine, quality of item have reached designing requirement.
The extrusion molding composition of raw materials and the technology that the purpose of this invention is to provide a kind of plastic-wood section.
Another object of the present invention provides a cover heating in vacuum formula measurement charging device.
In order to realize goal of the invention, following technical scheme and equipment have been adopted.
Representative formula:
Raw material proportioning (by weight) (1) polyethylene (PE) resin 30-80 part (2) string powder 20-70 part (3) stearic acid 0.1-0.5 part (4) Tissuemat E 0.1-2.0 part (5) antioxidant 0.1-0.5 part (6) reinforced modifier 1-5 part
Polyvinyl resin in the raw material can also be the broken material of the waste or used plastics of recovery.The waste or used plastics that reclaims is slightly picked up classification, clean up, be broken into particle, just can be used as raw material and use.Here the kind of high and low pressure can be regardless of, only the melt index of mixing waste need be tested.With the consumption that needs to strengthen modifier and antioxidant in the prescription of waste and old material.
Formula system of the present invention has the general high filling formulation part of small pin for the case to be: the reinforced modifier in the prescription can reduce the interfacial tension of different component, and the wettability on raising filler surface, dispersed, inconsistent two kinds of components are combined, form the compound that compatible blend intensity heightens.This modifier has solved the low problem of blend intensity between organic polymer and two kinds of materials of organic low molecular.It need not be handled filler in advance, can be undertaken by former batch mixing operating procedure.
Plastic-wood section extruding-out process of the present invention is:
(A) by filling a prescription, at first the string powder is put into high-speed mixer and stir intensification after all raw materials meterings, with the moisture removal in the string powder, 90-100 ℃ of outlet temperature scope.In temperature-rise period, with the dehumidifier operation, accelerate the dehumidifying process in good time, this is called dynamic drying process;
(B) add polyvinyl resin and other component then, continue to stir, inferior process is a secondary temperature elevation, and temperature reaches 100-120 ℃;
C) 100-120 ℃ material is entered in the low speed mixer, be cooled to below 40 ℃;
(D) material that is cooled to below 40 ℃ enters barrel, is stirred in the barrel helical-ribbon type that the continual material that stirs up and down makes material not stratified in the whole process of production; Material enters a cover heating in vacuum formula measurement charging device then, makes material obtain dry the processing once more;
(E) dry good mixed material enters the conical double screw extruder plasticizing, from the mould extrusion molding, must guarantee whole end face discharging speed unanimity when mould is extruded;
Process conditions are:
Extruder temperature control range: 145 ℃-150 ℃-152 ℃-155 ℃
Mold temperature control range: 150-170 ℃
The feeder rotating speed: with material main-machine screw not material stock be as the criterion
Main-machine screw temperature control: 70-90 ℃
Main exhaust vacuum: 0.03MPa-0.06MPa
Melt pressure: 30-60MPa
Main frame moment of torsion: 40-80%
(F) material after the moulding is through vacuum cooled calibrator, vaporific spray cooling device, after traction clamps, could open vacuum, cold water is adjusted, the speed of extruded material must be complementary with the speed of traction, when the size of cooled profile size of typing and final stage calibrator matches, adjust promptly and finish, this technology is called cooling and shaping technology;
(G) when section bar reaches predetermined length, cutting is finished and is blocked automatically, and section bar enters stacking adapter, finishes production process.
The above-mentioned heating in vacuum formula measurement charging device of mentioning comprises:
The barrel of band helical-ribbon type stirring is connected with flange bolt with the conveying screw rod machine barrel;
One group of conveying screw rod is positioned within the conveying screw rod machine barrel, and two ends are by bearings, and machine barrel has heat insulation water(-cooling) jacket;
Three groups of Electrothermal ring and blower fan cooling combinations that are positioned at conveying screw rod machine barrel outside, Electrothermal ring is fixed by screw, and blower fan is fixed on the protective cover;
Three heat sensors that are connected with conveying screw rod machine barrel below screw, and be connected with temp controlled meter with lead;
An observation window that is connected with conveying screw rod machine barrel flange;
A vacuum meter that is connected by pipeline with observation window;
A control valve that is connected with observation window by pipeline.
Dynamic continuous dry drying process among the present invention and heating in vacuum formula measurement charging device are just to finish the operation that removes moisture in big production procedure, and be again that secondary drying is handled, reduce equipment investment, remove numerous and diverse work at intermittence from, avoid material to disperse, guarantee the quality of raw material.The material of the conventional method commute moisture absorption, especially granular material, it is very difficult to carry out drying as string powder etc., because of their granularities are little, and light specific gravity, it is serious to disperse, consumption hour is generally anticipated with drying baker and to be re-used, and time-consuming the taking a lot of work of this static intermittent drying also strengthened equipment investment, fashionable when adding in a large number, just have a strong impact on throughput rate.Existing plastic raw materials drier also is primarily aimed at shot-like particle and establishes.
Cooling and shaping technology of the present invention both can make section bar reduce the temperature to the indeformable stage in the typing scope, also can guarantee higher pulling speed simultaneously.General section bar cooling and shaping technology is after material comes out from extrusion die, just in the shortest time it is cooled down rapidly by calibrator as much as possible, and this is suitable for for the goods that wall is thin, inserts is few.But to the plastic-wood section wall thickness reach 10-20mm, filler is answered 1: 1 situation, former method is just dying.The adding of a large amount of wood fibres, heat-transfer effect is poorer.Cooling rapidly, appearance is cold, heart or heat, thermal expansion distortion in must causing.Especially at the driving debugging initial stage, expansive force is stuck in the calibrator section bar sometimes.Process for cooling adopts progressively cooling for this reason.The front portion of calibrator can not chilling near mold, temperature control.The temperature control means can be the air coolings, and also constant temperature liquid is regulated cooling.In addition, must strengthen the length of typing cooling.Temperature control for the hollow product core is the key of finished product.Adopt the air cooling to prove feasible, but the valve of adjustment randomly regulating will be arranged.
With reference to GB11718.4-1989 GB11718.8-1989 GB12620.8-1990 standard detection, its performance test results is as follows: test item testing result rupture strength (MPa) 49.8 water absorption rates (%) 0.26 bulk densities (g/cm) 1.08 toughness (KJ/m through national building materials test center for the plastic-wood section of making through above-mentioned plastic-wood section extruding-out process
2) 17.0
Use the plastic-wood section extruding-out process, obtain the plastic-wood section of numerous kinds, packing material, cargo pallet and building materials pipeline etc. that can instead of pure wood.
In sum, use the section bar of plastic-wood section extruding-out process of the present invention and device fabrication, the product of making has following advantage:
(1) structural shape, its every mechanical performance is suitable with hardwood, and the durability of whole pallet is better than ten times on high-quality hardwood pallet;
(2) 99% raw material is a waste and scrap, and low price;
(3) can be made into various sizes, the pallet of specification and packing case;
(4) reclaiming that product can 100%;
(5) the wood composite material product is not stung by any damaging by worms, long fungi, do not breed bacterium, anti-strong acid-base, do not absorb moisture, not yielding etc.;
(6) product is fire-retardant fully.
The invention will be further described below in conjunction with the drawings and specific embodiments:
Fig. 1 is a plastic-wood section extruding-out process schematic flow sheet.
The dehumidifying that will heat up by the raw material of prescription metering mixes, through conical double screw extruder plasticizing, mould molding, and the plastic-wood section typing cooling after the moulding, through traction, fixed length cutting, finished product is finished again.
Fig. 2 is heating in vacuum formula measurement charging device schematic diagram.
Mixed material is constantly stirred 2 by helical-ribbon type and stirs up and down in barrel 1, and falls to heat insulation water-cooled But overlap, be positioned on the conveying screw rod 5 of conveying screw rod machine barrel 3, heat is provided by Electrothermal ring 4, and is anti-by being positioned at Blower fan 7 coolings on the guard shield 6, and temperature automatically controlled by temperature control instrument by sensor 12. Observation at form 9 Lower, material joins in the extruder with the rotary metering of conveying screw rod 5. Humidity-discharging device is to be connected in by pipeline 10 Vacuum source, and by control valve 11, vacuum meter 8, technology is monitored adjustment.
Embodiments of the invention are provided below.
Embodiment 1
Prescription:
Raw material proportioning (by weight)
(1) polyvinyl resin: 60 parts of high pressure P E:1I2A-1,1I20A etc.Low pressure PE:5000S, J-III etc.
(2) string powder: 40 parts of fineness: more than 40 orders, water content: " 6% various wood powders, bamboo powder, shell powder, paddy and wheat bar powder
(3) stearic acid: 0.3 part
(4) Tissuemat E: 1.2 parts of molecular weight: 2000 fusing points: 107 ℃
(5) modifier CPE: 2 parts
(6) antioxidant 1076: 0.3 part
1076(C
35H
62O
3)
The process of taking is: after (A) all raw materials being measured, at first the string powder put into high-speed mixer and stirs intensification by prescription, and with the moisture removal in the string powder, 90-100 ℃ of outlet temperature scope.In temperature-rise period, with the dehumidifier operation, accelerate the dehumidifying process in good time, this is called dynamic drying process;
(B) add polyvinyl resin and other component then, continue to stir, inferior process is a secondary temperature elevation, and temperature reaches 100-120 ℃;
(C) 100-120 ℃ material is entered in the low speed mixer, be cooled to below 40 ℃;
(D) material that is cooled to below 40 ℃ enters barrel, is stirred in the barrel helical-ribbon type that the continual material that stirs up and down makes material not stratified in the whole process of production; Material enters a cover heating in vacuum formula measurement charging device then, makes material obtain dry the processing once more;
(E) dry good mixed material enters the conical double screw extruder plasticizing, from the mould extrusion molding, must guarantee whole end face discharging speed unanimity when mould is extruded;
Process conditions are:
Extruder temperature control range: 145 ℃-150 ℃-152 ℃-155 ℃
Mold temperature control range: 150-170 ℃
The feeder rotating speed: with material main-machine screw not material stock be as the criterion
Main-machine screw temperature control: 70-90 ℃
Main exhaust vacuum: 0.03MPa-0.06MPa
Melt pressure: 30-80MPa
Main frame moment of torsion: 40-80%
(F) material after the moulding is through vacuum cooled calibrator, vaporific spray cooling device, after traction clamps, could open vacuum, cold water is adjusted, the speed of extruded material must be complementary with the speed of traction, when the size of cooled profile size of typing and final stage calibrator matches, adjust promptly and finish, this technology is called cooling and shaping technology;
(G) when section bar reaches predetermined length, cutting is finished and is blocked automatically, and section bar enters stacking adapter, finishes production process.
Embodiment 2
Composition of raw materials (by weight)
(1) polyvinyl resin: 30 parts
(selecting for use melt index higher, good fluidity)
(2) string powder: 70 parts of fineness: more than 40 orders, water content: " 6% various wood powders, bamboo powder, shell powder, paddy and wheat bar powder
(3) stearic acid: 0.3 part
(4) Tissuemat E: 1.5 parts
Molecular weight: 2000
Fusing point: 107 ℃
(5) modifier EVA:3 part
(6) antioxidant 1010: 0.3 part
1010(C
73H
108O
12)
Take the same process of the foregoing description 1.
Embodiment 3
Composition of raw materials (by weight)
(1) polyvinyl resin: 45 parts
(2) string powder: 55 parts of fineness: more than 40 orders, water content: " 6% various wood powders, bamboo powder, shell powder, paddy and wheat bar powder
(3) stearic acid: 0.5 part
(4) Tissuemat E: 1.6 parts
(5) modifier EVA:4.5 part
(6) antioxidant 1010: 0.5 part
Take the foregoing description 1 same process.
By the adjustment of technical recipe, adopt other three kinds of screw extruders, also can produce qualified product.By the adjustment of technical recipe, temperature improves in right amount, with the qualified section bar of the same production of parallel double-screw extruder; Produce plastic-wood section with special screw extruder, the structure of single-screw machine allows its carrying bigger moment of torsion and between centers power.But this single screw rod is not common, is having of manufacturing and designing especially to strengthen the special screw rod that mixing section, vacuum exhaust section and screw rod core have the equilibrium temperature device according to arts demand, and technical recipe also will be adjusted; Produce plastic-wood section with common single screw extrusion machine, raw materials for production must be particulate material, i.e. the particulate material after pulverizing processing by the particulate material of comminutor production or the defective section bar of having produced in advance.The particulate material of this pulverizing is because of living through once mixing plasticizing process, so secondary also can accomplish the end in view through single-screw machine production in extruder.
Claims (3)
1. plastic-wood section expressing technique is characterized in that:
The A composition of raw materials is as follows:
Raw material proportioning (by weight) (1) polyethylene (PE) resin 30-80 part (2) string powder 20-70 part (3) animi resin 0.1-0.5 part (4) Tissuemat E 0.1-2.0 part (5) antioxidant 0.1-0.5 part (6) reinforced modifier 1-5 part;
The B technological process is as follows: mixes by the dehumidifying that heats up of the raw material of proportioning metering, and through conical double screw extruder plasticizing, mould extrusion molding, the plastic-wood section cooling and shaping after the moulding, again through traction, fixed length cutting, finished product is finished; Concrete steps are as follows:
(A) by prescription with the metering of all raw materials after, at first the string powder is put into high-speed mixer and stirs intensification, with dynamic drying process with the moisture removal in the string powder, 90-100 ℃ of outlet temperature scope;
(B) add polyvinyl resin and other component then, continue to stir, carry out secondary temperature elevation, temperature reaches 100-120 ℃;
(C) 100-120 ℃ material is entered in the low speed mixer, be cooled to below 40 ℃;
(D) material that is cooled to below 40 ℃ enters barrel, is stirred in the barrel helical-ribbon type that the continual material that stirs up and down makes material not stratified in the whole process of production; Material enters a cover heating in vacuum formula measurement charging device then, makes material obtain dry the processing once more;
(E) dry good mixed material enter the conical double screw extruder plasticizing, from the mould extrusion molding;
(F) carry out cooling and shaping through cooling and shaping technology;
(G) when section bar reaches predetermined length, cutting is finished and is blocked automatically, and section bar enters stacking adapter, finishes production process.
2. technology according to claim 1, its feature also is: the reinforced modifier in the prescription is EVA or CPE.
3. heating in vacuum formula measurement charging device of implementing the technology of claim 1 is characterized in that it comprises:
A band helical-ribbon type stirs the barrel (1) of (2), and this barrel (1) is connected with flange bolt with conveying screw rod machine barrel (3);
One group of conveying screw rod (5) is arranged in the conveying screw rod machine barrel (3), and two ends are by bearings, and conveying screw rod machine barrel (3) has heat insulation water(-cooling) jacket;
Three groups of Electrothermal rings (4) and blower fan (7) cooling combination are arranged at conveying screw rod machine barrel (3) outside, and Electrothermal ring (4) is fixed by screw, and blower fan is fixed on the protective cover (6);
Three heat sensors (12) are arranged at conveying screw rod machine barrel (3) below, connect with screw, and are connected with temp controlled meter with lead;
An observation window (9) is connected with conveying screw rod machine barrel (3) flange;
A vacuum meter (8) is connected by pipeline with observation window (9);
A control valve (11) is connected with form (9) by pipeline (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00132561A CN1128053C (en) | 2000-11-28 | 2000-11-28 | Extruding-out process and apparatus for plastics-wood sections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00132561A CN1128053C (en) | 2000-11-28 | 2000-11-28 | Extruding-out process and apparatus for plastics-wood sections |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1296881A CN1296881A (en) | 2001-05-30 |
| CN1128053C true CN1128053C (en) | 2003-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00132561A Expired - Fee Related CN1128053C (en) | 2000-11-28 | 2000-11-28 | Extruding-out process and apparatus for plastics-wood sections |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100429277C (en) * | 2006-07-03 | 2008-10-29 | 安徽科技开发公司 | Agricultural stalk base wood and plastic composite material and combination processing method |
| CN101787167B (en) * | 2010-02-26 | 2011-08-03 | 华南师范大学 | High-performance antibiosis wood plastic composite material and preparation method thereof |
| CN102924941A (en) * | 2011-08-08 | 2013-02-13 | 深圳市格林美高新技术股份有限公司 | High-strength wear-resistant plastic wood composite material and preparation method thereof |
| CN104029368A (en) * | 2014-03-25 | 2014-09-10 | 广东达诚机械有限公司 | Forced feeding device of sheet extruding machine |
| CN104290311B (en) * | 2014-09-30 | 2017-02-15 | 濮阳市东宝科技发展有限公司 | Wood-plastic section bar production equipment and wood-plastic section bar production process |
| CN104527104B (en) * | 2014-11-28 | 2017-01-11 | 中材科技股份有限公司 | Continuous forming device for hollow composite board-wood plastic composite material and application thereof |
| WO2019238608A1 (en) * | 2018-06-15 | 2019-12-19 | Battenfeld-Cincinnati Germany Gmbh | Device and method for cutting an extruded pipe to length |
| CN114523609A (en) * | 2021-12-31 | 2022-05-24 | 安徽科居新材料科技有限公司 | Plastic-wood processing and conveying equipment with environment-friendly function and method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103829A (en) * | 1993-12-15 | 1995-06-21 | 行唐县新型装饰材料厂 | Regenerative board made of plastics and wood and the processing art |
| CN1113991A (en) * | 1994-06-04 | 1995-12-27 | 莱阳市塑料一厂 | Plastic and wood shuttering |
| CN1240804A (en) * | 1999-07-29 | 2000-01-12 | 马召义 | Wood-plastic material |
-
2000
- 2000-11-28 CN CN00132561A patent/CN1128053C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103829A (en) * | 1993-12-15 | 1995-06-21 | 行唐县新型装饰材料厂 | Regenerative board made of plastics and wood and the processing art |
| CN1113991A (en) * | 1994-06-04 | 1995-12-27 | 莱阳市塑料一厂 | Plastic and wood shuttering |
| CN1240804A (en) * | 1999-07-29 | 2000-01-12 | 马召义 | Wood-plastic material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1296881A (en) | 2001-05-30 |
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