CN103538230A - Improved structure of screw barrel vacuum chamber of plastic extruder - Google Patents
Improved structure of screw barrel vacuum chamber of plastic extruder Download PDFInfo
- Publication number
- CN103538230A CN103538230A CN201310529049.1A CN201310529049A CN103538230A CN 103538230 A CN103538230 A CN 103538230A CN 201310529049 A CN201310529049 A CN 201310529049A CN 103538230 A CN103538230 A CN 103538230A
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- China
- Prior art keywords
- vacuum chamber
- vacuum
- improved
- extruding machine
- thermocouple
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/834—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
- B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
- B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
- B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a barrel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92209—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92361—Extrusion unit
- B29C2948/92419—Degassing unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92914—Degassing unit
Abstract
The invention discloses an improved structure of a screw barrel vacuum chamber of a plastic extruder. The improved structure of the screw barrel vacuum chamber comprises a vacuum withdrawing section and a vacuum chamber, wherein the vacuum withdrawing section is arranged on the rear section of a screw barrel of the plastic extruder, the vacuum chamber is vertically installed on the top of a withdrawing port of the vacuum withdrawing section, the withdrawing port of the vacuum chamber is provided with a vacuumizing pipe with a cooling water passage, a thermocouple installation pipe for storing a thermal couple assembly is arranged in the vacuum chamber, and the thermocouple assembly is connected with a control center of the plastic extruder. The structure is reasonable and reliable, the cost is low, the use is convenient and the effect is obvious. When the vacuum returned material exceeds a set temperature, an alarm can issue an acoustic-optic alarm, a worker is reminded of executing the clearing in time, thus not only can the qualification rate and production efficiency of a finished product be improved, but also the loss of a conventional spare part of the vacuumizing device can be reduced, and the service life of the vacuum device can be prolonged.
Description
Technical field
The present invention relates to the technical field that plastic processing, food processing, medicine preparation etc. need to adopt evacuation process to manufacture, refer in particular to a kind of structure-improved of screw tube vacuum chamber of plastic extruding machine.
Background technology
At present, in plastic extruding pelletization production process, in order to guarantee product quality, need in extruding pelletization process, vacuumize, to remove little molecule volatile matter and the processing aid in fused materials.Conventionally plastics can volatilize small-molecule substance and processing aid during fusion plastification in barrel, these materials that evaporate at extruder vacuum chamber place by negative pressure extracting in vacuum line, because these material corrosivity that evaporate are stronger, temperature is denseer, to follow-up vaccum-pumping equipment sealing gasket seriously corroded.When there is vacuum returning charge, the material of melting flows to vacuum-pumping tube gradually by vacuum, and is set at leisure vacuum tube rear end, finally stops up vacuum tube, damages sealing gasket and cause producing and occur abnormal interruption.And employee is difficult to find that vacuum has extremely before vacuum tube blocks, very disadvantageous during this normal production to plastic granulating.
In sum, there are following three shortcomings in current plastic extruding pelletization vacuum chamber:
1, there is no returning charge checkout gear, when production process starts to occur vacuum returning charge, employee can not find this problem, so both can affect product quality, can cause again and produce abnormal interruption.
2, there is no vacuum cool-down device, little molecule volatile matter is directly extracted in vacuum equipment without cooling, serious on the seal impact of equipment, causes seal renewal cost to increase.
3, there is no vacuum cool-down device, during vacuum returning charge, the material of melting can block vacuum tube and coupled vacuum equipment, both can cause employee to clear up difficulty, can affect again vacuum equipment service life.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of rational in infrastructure reliable, cost is low, easy to use, the structure-improved of the screw tube vacuum chamber of plastic extruding machine of successful.
For achieving the above object, technical scheme provided by the present invention is: a kind of structure-improved of screw tube vacuum chamber of plastic extruding machine, comprise the vacuum extraction section that is positioned at screw tube of plastic extruding machine back segment, and be vertically mounted on described vacuum and extract the vacuum chamber that section is extracted mouthful top out out, the exit of taking out of described vacuum chamber disposes the vacuum-pumping tube with cooling-water duct, in described vacuum chamber, be provided with for the thermocouple of accommodating thermocouple assembly and settle pipe, described thermocouple assembly is connected with the control centre of plastic extruder.
Described thermocouple settles pipe to be vertically arranged at described vacuum chamber top.
Described vacuum chamber is tubular vacuum chamber, and described thermocouple settles pipe to be located on the axis direction of vacuum chamber.
The axial thread section that described thermocouple settles pipe to arrange by its outer peripheral face is threaded with the gland at vacuum chamber top.
Bottom described thermocouple arrangement pipe cecum, extracting a section vertical range D who extracts mouth out out with described vacuum is 10～30mm.
Described thermocouple settles pipe for thin-wall stainless steel.
The downward-sloping setting of described vacuum-pumping tube.
The water (flow) direction of described cooling-water duct with vacuumize opposite direction.
Described cooling-water duct is helical channel.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, vacuum-pumping tube of the present invention, with cooling-water duct, can fast and effeciently reduce the temperature of little molecule volatile matter and returning charge;
2, the present invention is provided with the thermocouple arrangement pipe that thermocouple assembly can be installed, and by thermocouple assembly, accurately measures the temperature in vacuum chamber;
3, temperature detection part of the present invention can be set different returning charge alarm temperatures according to processing different material, when vacuum returning charge surpasses design temperature, alarm will send sound and light alarm, reminding employees is cleared up in time, qualification rate and the production efficiency of finished product have not only been improved, can also reduce the loss of vaccum-pumping equipment spare part in common, extend vacuum equipment service life.
Accompanying drawing explanation
Fig. 1 is axonometric drawing of the present invention.
Fig. 2 is cutaway view of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Shown in Fig. 1 and Fig. 2, the structure-improved of the screw tube vacuum chamber of plastic extruding machine described in the present embodiment, comprise the vacuum extraction section 7 that is positioned at screw tube of plastic extruding machine back segment, and be vertically mounted on described vacuum and extract section 7 out and extract the vacuum chamber 1 at mouthful tops out, wherein, described vacuum chamber 1 is tubular vacuum chamber, take out exit and dispose the vacuum-pumping tube 2 with cooling-water duct 6, the material entering in vacuum chamber 1 is finally extracted out by vavuum pump after vacuum-pumping tube 2 is cooling, the downward-sloping setting of described vacuum-pumping tube 2, so that the condensed fluid being created in vacuum-pumping tube 2 flows out vacuum-pumping tube 2, cooling procedure not only can be accelerated little molecule volatile matter or returning charge and is condensed into rapidly liquid or solid and do not affect system vacuum degree, can also reduce the temperature of vacuum gas, the service life of prolongation system sealing part etc., in addition, for further that little molecule volatile matter is cooling, water (flow) direction in cooling-water duct 6 with vacuumize opposite direction, and cooling-water duct 6 be shaped as helical form.The arrangement of the thermocouple for accommodating thermocouple assembly 3 pipe 4 that can vertically insert in it is equipped with at the top of described vacuum chamber 1, this thermocouple settles pipe 4 to be specially thin-wall stainless steel, and corresponding being located on the axis direction of vacuum chamber 1, this thermocouple settles the pipe 4 axial thread sections that arrange by its outer peripheral face to be threaded with the gland 5 at vacuum chamber 1 top, so that employee's dismounting, and the degree of depth in adjustable its insertion vacuum chamber 1, the vertical range D that described thermocouple is settled bottom pipe 4 cecums and described vacuum extraction section 7 is extracted mouth out are 10～30mm.Described thermocouple assembly 3 correspondences are inserted into this thermocouple and settle in pipe 4, and the control centre of connecting plastic extruder, when the temperature in thermocouple assembly 3 detects vacuum chamber 1 surpasses design temperature, control centre can export sound and light alarm, reminding employees is cleared up in time, the qualification rate and the production efficiency that have so not only improved finished product, can also reduce the loss of vaccum-pumping equipment spare part in common, extends vacuum equipment service life; In addition, the thermocouple assembly 3 described in the present embodiment also can be set different returning charge alarm temperatures according to processing different material, by regulating thermocouple to settle the insertion depth of pipe 4, to realize its Measurement accuracy to vacuum chamber 1 interior temperature, accurately exports returning charge and reports to the police.
Be below the structure improved specific works principle of the above-mentioned screw tube vacuum chamber of plastic extruding machine of the present embodiment: during work, plastics can produce little molecule volatile matter during melt-processed in barrel, afterwards little molecule volatile matter can enter vacuum-pumping tube 2 under the suction function of vacuum chamber 1, now, cooling circulating water is logical 6 interior the flowing of the cooling water in vacuum-pumping tube 2 perisporiums constantly, so little molecule volatile matter can be cooled during through vacuum-pumping tube 2 after circulating water and enter follow-up vacuum equipment again, and after condensation, enter again and vacuumize main line in vacuum equipment, in this process, thermocouple assembly 3 can detect vacuum indoor temperature in real time, and temperature information is fed back to control centre with the form of the signal of telecommunication, and be presented on plastic extruder touch-screen, when there is vacuum returning charge, the temperature that thermocouple assembly 3 detects can raise and surpass setting value suddenly, now, the PLC of control centre can provide sound and light alarm signal after judgement, it is abnormal that employee finds can clear up in time after sound and light alarm vacuum, to avoid producing defective work.
After adopting above scheme, the present invention has set up water cooling part (can fast and effeciently reduce the temperature of little molecule volatile matter and returning charge) and temperature detection part (can detect vacuum indoor temperature in real time, can accurately export returning charge, report to the police), this compared to existing technology, of the present invention rational in infrastructure reliable, cost is low, easy to use, successful, when vacuum returning charge surpasses design temperature, alarm will send sound and light alarm, reminding employees is cleared up in time, qualification rate and the production efficiency of finished product have so not only been improved, can also reduce the loss of vaccum-pumping equipment spare part in common, extend vacuum equipment service life.Therefore, comprehensively described in, the present invention is a desirable screw tube vacuum chamber of plastic extruding machine, is worthy to be popularized.
The examples of implementation of the above are only the present invention's preferred embodiment, not with this, limit practical range of the present invention, therefore the variation that all shapes according to the present invention, principle are done all should be encompassed in protection scope of the present invention.
Claims (9)
1. the structure-improved of a screw tube vacuum chamber of plastic extruding machine, comprise the vacuum extraction section (7) that is positioned at screw tube of plastic extruding machine back segment, and be vertically mounted on described vacuum and extract the vacuum chamber (1) that section (7) is extracted mouthful top out out, it is characterized in that: the exit of taking out of described vacuum chamber (1) disposes the vacuum-pumping tube (2) of being with cooling-water duct (6), in described vacuum chamber (1), be provided with for the thermocouple of accommodating thermocouple assembly (3) and settle pipe (4), described thermocouple assembly (3) is connected with the control centre of plastic extruder.
2. the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine according to claim 1, is characterized in that: described thermocouple settles pipe (4) to be vertically arranged at described vacuum chamber (1) top.
3. the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine according to claim 2, is characterized in that: described vacuum chamber (1) is tubular vacuum chamber, and described thermocouple settles pipe (4) to be located on the axis direction of vacuum chamber (1).
4. the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine according to claim 3, is characterized in that: the axial thread section that described thermocouple settles pipe (4) to arrange by its outer peripheral face is threaded with the gland (5) at vacuum chamber (1) top.
5. the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine according to claim 4, is characterized in that: described thermocouple arrangement is managed bottom (4) cecum and a vertical range D for described vacuum extraction section (7) extraction mouth is 10～30mm.
6. the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine according to claim 5, is characterized in that: described thermocouple settles pipe (4) for thin-wall stainless steel.
7. the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine according to claim 6, is characterized in that: the downward-sloping setting of described vacuum-pumping tube (2).
8. according to the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine described in claim 1 to 7 any one, it is characterized in that: the water (flow) direction of described cooling-water duct (6) with vacuumize opposite direction.
9. the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine according to claim 8, is characterized in that: described cooling-water duct (6) is helical channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529049.1A CN103538230B (en) | 2013-10-31 | 2013-10-31 | A kind of structure-improved of screw tube vacuum chamber of plastic extruding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529049.1A CN103538230B (en) | 2013-10-31 | 2013-10-31 | A kind of structure-improved of screw tube vacuum chamber of plastic extruding machine |
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| Publication Number | Publication Date |
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| CN103538230A true CN103538230A (en) | 2014-01-29 |
| CN103538230B CN103538230B (en) | 2015-12-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107696452A (en) * | 2017-10-13 | 2018-02-16 | 张家港大塚化学有限公司 | The vacuum extractor of double screw extruder |
| CN110410540A (en) * | 2019-08-20 | 2019-11-05 | 金发科技股份有限公司 | Prevent the installation method of extruder vacuum returning charge |
| CN112157890A (en) * | 2020-09-14 | 2021-01-01 | 重庆泰山电缆有限公司 | Cable extruding machine head structure |
| WO2021031120A1 (en) * | 2019-08-20 | 2021-02-25 | 金发科技股份有限公司 | Device and method for preventing vacuum material returning in an extruder |
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| US4711647A (en) * | 1985-05-02 | 1987-12-08 | Barmag Aktiengesellschaft | Process and apparatus for degassing liquids, especially polymer melts and solutions |
| CN2468707Y (en) * | 2001-04-04 | 2002-01-02 | 中国石油化工股份有限公司 | Devolatilization dual worm venting apparatus |
| JP2008036942A (en) * | 2006-08-04 | 2008-02-21 | Unitika Ltd | Manufacturing process of thermoplastic resin composition pellet |
| CN201313395Y (en) * | 2008-11-11 | 2009-09-23 | 上海金发科技发展有限公司 | Vacuum chamber with conical bottom |
| CN202318881U (en) * | 2011-11-17 | 2012-07-11 | 株洲时代工程塑料制品有限责任公司 | Extruder and vacuum chamber thereof |
| CN203637133U (en) * | 2013-10-31 | 2014-06-11 | 天津金发新材料有限公司 | Improved structure of plastic extruder spiral barrel vacuum chamber |
-
2013
- 2013-10-31 CN CN201310529049.1A patent/CN103538230B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4711647A (en) * | 1985-05-02 | 1987-12-08 | Barmag Aktiengesellschaft | Process and apparatus for degassing liquids, especially polymer melts and solutions |
| CN2468707Y (en) * | 2001-04-04 | 2002-01-02 | 中国石油化工股份有限公司 | Devolatilization dual worm venting apparatus |
| JP2008036942A (en) * | 2006-08-04 | 2008-02-21 | Unitika Ltd | Manufacturing process of thermoplastic resin composition pellet |
| CN201313395Y (en) * | 2008-11-11 | 2009-09-23 | 上海金发科技发展有限公司 | Vacuum chamber with conical bottom |
| CN202318881U (en) * | 2011-11-17 | 2012-07-11 | 株洲时代工程塑料制品有限责任公司 | Extruder and vacuum chamber thereof |
| CN203637133U (en) * | 2013-10-31 | 2014-06-11 | 天津金发新材料有限公司 | Improved structure of plastic extruder spiral barrel vacuum chamber |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107696452A (en) * | 2017-10-13 | 2018-02-16 | 张家港大塚化学有限公司 | The vacuum extractor of double screw extruder |
| CN110410540A (en) * | 2019-08-20 | 2019-11-05 | 金发科技股份有限公司 | Prevent the installation method of extruder vacuum returning charge |
| WO2021031120A1 (en) * | 2019-08-20 | 2021-02-25 | 金发科技股份有限公司 | Device and method for preventing vacuum material returning in an extruder |
| CN112157890A (en) * | 2020-09-14 | 2021-01-01 | 重庆泰山电缆有限公司 | Cable extruding machine head structure |
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| Publication number | Publication date |
|---|---|
| CN103538230B (en) | 2015-12-16 |
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