CN103433229A - Method for cleaning screw extruder - Google Patents
Method for cleaning screw extruder Download PDFInfo
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- CN103433229A CN103433229A CN2013103697304A CN201310369730A CN103433229A CN 103433229 A CN103433229 A CN 103433229A CN 2013103697304 A CN2013103697304 A CN 2013103697304A CN 201310369730 A CN201310369730 A CN 201310369730A CN 103433229 A CN103433229 A CN 103433229A
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- screw extruder
- cleaning
- polyvinyl alcohol
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Abstract
The invention discloses a method for cleaning a screw extruder. According to the method for cleaning the screw extruder, when extruded products are machined and the screw extruder needs to be cleaned, cleaning materials are added into a sleeve of the screw extruder, a main machine is operated to enable the cleaning materials in the sleeve to be discharged continuously, and the cleaning materials contain polyving akohol. The method for cleaning the screw extruder has the advantages that screws of the screw extruder and the sleeve can be cleaned easily and conveniently, and the cleaning cost is low.
Description
Technical field
The present invention relates to a kind of cleaning method, particularly relate to a kind of cleaning method of screw extruder.
Background technology
Existing screw rod mechanism---as plastic overmold machine, single screw extrusion machine, double screw extruder and injection moulding machine etc., before changing factory formula and product colour, must being cleaned screw rod and sleeve, prevent the product that screw rod will be produced from the different material impact of last consignment of remnants in sleeve, make color and performance be affected.Its traditional cleaning method is, with the raw material that will produce, adds in sleeve, and heating, then constantly discharge material remaining in sleeve, until color and performance and will to produce product consistent.This cleaning method wastes raw material, electric, water, but also loses time.And some not the raw material of easy to clean also can in sleeve, gather, because high temperature heats for a long time, likely can carbonization, therefore, generally in industrial use, all need must remove screw rod at set intervals, then the pellet of carbonization is cleared, lose time, workload is large, and easily damages machine.
Described in patent CN 101244616A with plant fruit or shell or through the plant rhizome of cutting or be equipped with again a certain proportion of surfactant, solvent, the chemical cleaning materials such as washing assisant, join the interior discharge scrubbing of sleeve of plastics machine, utilize plant fruit or plant rhizome expanded by heating and move sleeve surface is cleaned in sleeve, in addition, plant fruit or shell or relatively be difficult to determine through the fusing point of the plant rhizome of cutting, likely stop up screw rod in implementation process, and be difficult for discharging, and plant rhizome surface often can be containing inorganic particles such as silts, screw rod that can be very high to precision requirement and sleeve produce wearing and tearing.Described in patent CN100336892C is a class screw cleaning agent, be characterised in that: cleaning agent has comprised sodium sulfate of polyethenoxy ether of fatty alcohol, neopelex etc., make cleaning agent, very strong permeability and activation are arranged, the color in residual raw material is dissolved rapidly; Its shortcoming is that the chemical agent used has corrosiveness to screw rod and sleeve, and in addition, owing to having added many chemical assistants, therefore, the processing of need to classifying of the waste material of discharge, avoid contaminated environment.A kind of cleaning method of cortex fusing point lower than the covering thread woven cloth of the thread oblong-shaped skin-core structure of the coating of the skin-core structure of sandwich layer fusing point that adopt disclosed in patent CN 102198450A, this cleaning method is that this woven cloth is joined in the sleeve of screw extruder, and the running main frame is constantly discharged woven cloth.This cleaning method utilizes woven cloth to be cleaned, and because the globality of woven cloth can not clean to corner or the comparatively narrow gap in screw rod and sleeve, causes cleaning unclean.
Summary of the invention
For above-mentioned deficiency of the prior art, main purpose of the present invention is to provide a kind of cleaning method of screw extruder, can comparatively simply and easily the screw rod of screw extruder and sleeve be cleaned up, and it is lower to clean cost.
For achieving the above object, the technical solution used in the present invention is: a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, set corresponding extrusion temperature, the running main frame, constantly discharge the cleaning raw material in sleeve, and described cleaning raw material contains polyvinyl alcohol.
Preferably, described cleaning raw material comprises one or more in polyethylene, polypropylene, polystyrene.
Preferably, described cleaning raw material is comprised of polypropylene and polyvinyl alcohol, and in described cleaning raw material, polyacrylic mass percent is 60%-80%, and the mass percent of polyvinyl alcohol is 20%-40%.
Preferably, described cleaning raw material is comprised of polyethylene and polyvinyl alcohol, and in described cleaning raw material, poly mass percent is 60%-80%, and the mass percent of polyvinyl alcohol is 20%-40%.
Preferably, described cleaning raw material is comprised of polystyrene and polyvinyl alcohol, and in described cleaning raw material, the mass percent of polystyrene is 60%-90%, and the mass percent of polyvinyl alcohol is 10%-40%.
The cleaning method of the screw extruder described in the present invention, only need suitably regulate temperature and the screw speed of screw extruder, do not need to carry out other complicated cleanings, simple and fast.
The cleaning method of screw extruder of the present invention, while after extruded product machines, extruder being cleaned, clean raw material by adding in screw extruder, adjust screw speed, generally get 10-20 rev/min, the extruding dies place can see that a large amount of cleaning raw materials and the mixture of goods are extruded, the expanded state that the cleaning raw material is strip; Continue to add the cleaning raw material, when almost not having goods to be blended in the cleaning raw material, stop feeding in raw material, bolt rotary stops, and stops the heating of each section of extruder barrel; Be that the screw extruder cleaning is complete.Temperature, screw speed in the present invention when utilize cleaning raw material and clean screw extruder all determine according to the component of the cleaning raw material added, and temperature and the screw speed of screw extruder while extruding is technology well known to those skilled in the art.
The cleaning method of screw extruder of the present invention is applicable to just produce the cleaning of the extruder of the ABS of the PP material that contains carbon black, dyeing, the PE material that dyeed.
In the prior art of comparing, utilize polyethylene or pp material to clean the cleaning method of screw extruder, the present invention is mixed polyvinyl alcohol cleverly with polypropylene or polyethylene etc., utilize the sticking characteristic of polyvinyl alcohol decomposes, imbibition and tool to clean extruder.In operating process, when the mixed cleaning raw material by polyethylene or polypropylene and polyvinyl alcohol adds in screw extruder, the polyvinyl alcohol decomposes expands, can reduce polyethylene or polyacrylic consumption, when screw rod will clean raw material and extrude, due to the viscosity of polyvinyl alcohol, production material adhesion residual on screw rod can be taken out of cleaning on raw material, thereby make to keep clean in screw extruder.Pass through test of many times, while utilizing method of the present invention to clean screw extruder, utilize polyethylene or polypropylene than routine clean polyethylene or the polypropylene material of saving 2/3, even originally, need screw extruder could be cleaned up with three bags of polypropylene, after utilizing method of the present invention, use one bag of polypropylene to clean up.
In the present invention due to polyvinyl alcohol be light yellow after polyethylene, polypropylene, polystyrene mix, light color, therefore it is cleaner than additive method to the cleaning of the screw extruder of production the colorful one product that this cleans raw material, and do not hinder screw extruder production pure color after cleaning as white or other light materials.
Cleaning raw material in the cleaning method of screw extruder of the present invention can adopt polypropylene or the polyethylene that cost is not high, and polypropylene or polyethylene are mixed and make with polyvinyl alcohol, and material source is extensive.
The invention has the beneficial effects as follows: the cleaning method of screw extruder of the present invention, can comparatively simply and easily the screw rod of screw extruder and sleeve be cleaned up, and it is lower to clean cost.
The specific embodiment
Below preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
The embodiment of the present invention comprises:
embodiment 1:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 180 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged, and described cleaning raw material is polyvinyl alcohol and poly mixture.In described cleaning raw material, poly mass percent is 60%, and the mass percent of polyvinyl alcohol is 40%.
embodiment 2:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 180 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged, and described cleaning raw material is polyvinyl alcohol and poly mixture.In described cleaning raw material, poly mass percent is 80%, and the mass percent of polyvinyl alcohol is 20%.
embodiment 3:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 180 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged, and described cleaning raw material is polyvinyl alcohol and poly mixture.In described cleaning raw material, poly mass percent is 70%, and the mass percent of polyvinyl alcohol is 30%.
embodiment 4:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 180 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged, and described cleaning raw material is polyvinyl alcohol and polyacrylic mixture.In described cleaning raw material, polyacrylic mass percent is 60%, and the mass percent of polyvinyl alcohol is 40%.
embodiment 5:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 180 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged, and described cleaning raw material is polyvinyl alcohol and polyacrylic mixture.In described cleaning raw material, polyacrylic mass percent is 80%, and the mass percent of polyvinyl alcohol is 20%.
embodiment 6:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 200 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged, and described cleaning raw material is polyvinyl alcohol and polyacrylic mixture.In described cleaning raw material, polyacrylic mass percent is 70%, and the mass percent of polyvinyl alcohol is 30%.
embodiment 7:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 200 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged to the mixture that described cleaning raw material is polyvinyl alcohol and polystyrene.In described cleaning raw material, the mass percent of polystyrene is 60%, and the mass percent of polyvinyl alcohol is 40%.
embodiment 8:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 200 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged to the mixture that described cleaning raw material is polyvinyl alcohol and polystyrene.In described cleaning raw material, the mass percent of polystyrene is 90%, and the mass percent of polyvinyl alcohol is 10%.
embodiment 9:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 200 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged to the mixture that described cleaning raw material is polyvinyl alcohol and polystyrene.In described cleaning raw material, the mass percent of polystyrene is 70%, and the mass percent of polyvinyl alcohol is 30%.
embodiment 10:a kind of cleaning method of screw extruder, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, setting extrusion temperature is 200 ℃, the running main frame, cleaning raw material in sleeve is constantly discharged to the mixture that described cleaning raw material is polyvinyl alcohol and polystyrene.In described cleaning raw material, the mass percent of polystyrene is 80%, and the mass percent of polyvinyl alcohol is 20%.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (5)
1. the cleaning method of a screw extruder, it is characterized in that, while after extruded product machines, screw extruder being cleaned, by cleaning raw material, join in the sleeve of screw extruder, set corresponding extrusion temperature according to the component of cleaning raw material, the running main frame, constantly discharge the cleaning raw material in sleeve, and described cleaning raw material contains polyvinyl alcohol.
2. the cleaning method of screw extruder according to claim 1, is characterized in that, described cleaning raw material comprises one or more in polyethylene, polypropylene, polystyrene.
3. the cleaning method of screw extruder according to claim 2, it is characterized in that, described cleaning raw material is comprised of polypropylene and polyvinyl alcohol, and in described cleaning raw material, polyacrylic mass percent is 60%-80%, and the mass percent of polyvinyl alcohol is 20%-40%.
4. the cleaning method of screw extruder according to claim 2, it is characterized in that, described cleaning raw material is comprised of polyethylene and polyvinyl alcohol, and in described cleaning raw material, poly mass percent is 60%-80%, and the mass percent of polyvinyl alcohol is 20%-40%.
5. the cleaning method of screw extruder according to claim 2, it is characterized in that, described cleaning raw material is comprised of polystyrene and polyvinyl alcohol, and in described cleaning raw material, the mass percent of polystyrene is 60%-90%, and the mass percent of polyvinyl alcohol is 10%-40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103697304A CN103433229A (en) | 2013-08-23 | 2013-08-23 | Method for cleaning screw extruder |
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| CN2013103697304A CN103433229A (en) | 2013-08-23 | 2013-08-23 | Method for cleaning screw extruder |
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| CN103433229A true CN103433229A (en) | 2013-12-11 |
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| CN2013103697304A Pending CN103433229A (en) | 2013-08-23 | 2013-08-23 | Method for cleaning screw extruder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104646344A (en) * | 2014-12-19 | 2015-05-27 | 广东美的集团芜湖制冷设备有限公司 | Solid cleaning agent for cleaning injection screw and mold hot runner and application thereof |
| WO2016019719A1 (en) * | 2014-08-04 | 2016-02-11 | 深圳市光华伟业实业有限公司 | Cleaning method and cleaning line for nozzle of fdm-3d printer |
| CN106738781A (en) * | 2016-12-26 | 2017-05-31 | 张家港市大能塑料制品有限公司 | A kind of compound resin processing technology |
| CN109234816A (en) * | 2018-09-25 | 2019-01-18 | 福建闽瑞环保纤维股份有限公司 | A kind of cleaning process of extruder head |
| CN113246472A (en) * | 2021-06-29 | 2021-08-13 | 上海轮廓科技有限公司 | Method for cleaning hot end of fused deposition manufacturing type 3D printer |
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| WO2003002642A1 (en) * | 2001-06-29 | 2003-01-09 | Polyone Corporation | Blowing agent concentrate |
| WO2008102891A1 (en) * | 2007-02-22 | 2008-08-28 | Daicel Polymer Ltd. | Resin composition for cleaning |
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| CN102618401A (en) * | 2012-03-08 | 2012-08-01 | 杭州金州高分子科技有限公司 | Double-screw high-efficiency environment-friendly pelletized particle cleaning agent and production method thereof |
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- 2013-08-23 CN CN2013103697304A patent/CN103433229A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5958313A (en) * | 1996-04-11 | 1999-09-28 | Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha | Purging agent |
| JP2002020794A (en) * | 2000-07-05 | 2002-01-23 | Ube Cycon Ltd | Cleaning agent for molding machine |
| WO2003002642A1 (en) * | 2001-06-29 | 2003-01-09 | Polyone Corporation | Blowing agent concentrate |
| WO2008102891A1 (en) * | 2007-02-22 | 2008-08-28 | Daicel Polymer Ltd. | Resin composition for cleaning |
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| CN103242970A (en) * | 2012-02-09 | 2013-08-14 | 金发科技股份有限公司 | Resin composition for cleaning and preparation method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016019719A1 (en) * | 2014-08-04 | 2016-02-11 | 深圳市光华伟业实业有限公司 | Cleaning method and cleaning line for nozzle of fdm-3d printer |
| CN104646344A (en) * | 2014-12-19 | 2015-05-27 | 广东美的集团芜湖制冷设备有限公司 | Solid cleaning agent for cleaning injection screw and mold hot runner and application thereof |
| CN106738781A (en) * | 2016-12-26 | 2017-05-31 | 张家港市大能塑料制品有限公司 | A kind of compound resin processing technology |
| CN109234816A (en) * | 2018-09-25 | 2019-01-18 | 福建闽瑞环保纤维股份有限公司 | A kind of cleaning process of extruder head |
| CN113246472A (en) * | 2021-06-29 | 2021-08-13 | 上海轮廓科技有限公司 | Method for cleaning hot end of fused deposition manufacturing type 3D printer |
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Application publication date: 20131211 |