CN103538230B - A kind of structure-improved of screw tube vacuum chamber of plastic extruding machine - Google Patents
A kind of structure-improved of screw tube vacuum chamber of plastic extruding machine Download PDFInfo
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- CN103538230B CN103538230B CN201310529049.1A CN201310529049A CN103538230B CN 103538230 B CN103538230 B CN 103538230B CN 201310529049 A CN201310529049 A CN 201310529049A CN 103538230 B CN103538230 B CN 103538230B
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- Prior art keywords
- vacuum chamber
- vacuum
- extruding machine
- screw tube
- plastic extruding
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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
- B29C48/92—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
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of structure-improved of screw tube vacuum chamber of plastic extruding machine, comprise the vacuum being positioned at screw tube of plastic extruding machine back segment and extract section out, and be vertically mounted on the vacuum chamber that described vacuum extracts top, section outlet port out, the outlet port place of described vacuum chamber is configured with the vacuum-pumping tube of band cooling-water duct, pipe settled by the thermocouple be provided with in described vacuum chamber for accommodating thermocouple assembly, and described thermocouple assembly is connected with the control centre of plastic extruder.Of the present invention rational in infrastructure reliable, cost is low, easy to use, successful, when vacuum returning charge exceedes design temperature, alarm will send sound and light alarm, reminding employees is cleared up in time, not only increase qualification rate and the production efficiency of finished product like this, the loss of vaccum-pumping equipment spare part in common can also be reduced, extend vacuum equipment service life.
Description
Technical field
The present invention relates to plastic processing, food processing, medicine preparation etc. to need to adopt evacuation process to carry out the technical field manufactured, 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 ensure product quality, need to vacuumize in extruding pelletization process, to remove Small molecular volatile matter in fused materials and processing aid.Usual plastics can volatilize small-molecule substance and processing aid during fusion plastification in barrel, these materials evaporated at extruder vacuum chamber place by negative pressure extracting in vacuum line, because these material corrosivity evaporated 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 in vacuum tube rear end at leisure, finally blocks vacuum tube, damages sealing gasket and cause producing and occur abnormal interruption.And employee is difficult to find that vacuum has exception 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, do not have 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, do not have vacuum cool-down device, Small molecular volatile matter is directly extracted in vacuum equipment without cooling, serious on the seal impact of equipment, causes seal renewal cost to increase.
3, do not have vacuum cool-down device, the material of melting during vacuum returning charge can block vacuum tube and coupled vacuum equipment, and employee both can have been caused 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 being positioned at screw tube of plastic extruding machine back segment and extract section out, and be vertically mounted on the vacuum chamber that described vacuum extracts top, section outlet port out, the outlet port place of described vacuum chamber is configured with the vacuum-pumping tube of band cooling-water duct, pipe settled by the thermocouple be provided with in described vacuum chamber for accommodating thermocouple assembly, and 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 be arranged by its outer peripheral face is threaded with the gland at vacuum chamber top.
Described thermocouple settles the vertical range D extracting section outlet port bottom pipe cecum with described vacuum out to be 10 ~ 30mm.
Described thermocouple settles pipe to be thin-wall stainless steel.
The downward-sloping setting of described vacuum-pumping tube.
The water (flow) direction of described cooling-water duct is with to vacuumize direction contrary.
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 is with cooling-water duct, fast and effeciently can reduce the temperature of Small molecular volatile matter and returning charge;
2, the present invention is provided with the thermocouple can installing thermocouple assembly and settles pipe, is accurately measured the temperature in vacuum chamber by thermocouple assembly;
3, temperature detection part of the present invention can set different returning charge alarm temperatures according to processing different material, when vacuum returning charge exceedes design temperature, alarm will send sound and light alarm, reminding employees is cleared up in time, not only increase qualification rate and the production efficiency of finished product, the loss of vaccum-pumping equipment spare part in common can also be reduced, extend vacuum equipment service life.
Accompanying drawing explanation
Fig. 1 is axonometric drawing of the present invention.
Fig. 2 is sectional view of the present invention.
Detailed description of the invention
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 being positioned at screw tube of plastic extruding machine back segment and extract section 7 out, and be vertically mounted on the vacuum chamber 1 that described vacuum extracts top, section 7 outlet port out, wherein, described vacuum chamber 1 is tubular vacuum chamber, outlet port place is configured with the vacuum-pumping tube 2 of band cooling-water duct 6, the material entered in vacuum chamber 1 is extracted out eventually through vavuum pump and is gone after vacuum-pumping tube 2 cools, the downward-sloping setting of described vacuum-pumping tube 2, vacuum-pumping tube 2 is flowed out to make the condensed fluid of generation in vacuum-pumping tube 2, cooling procedure not only can be accelerated Small molecular volatile matter or returning charge and be condensed into rapidly liquid or solid and not influential system vacuum, the temperature of vacuum gas can also be reduced, extend the service life of system sealing part etc., in addition, in order to further Small molecular volatile matter be cooled, water (flow) direction in cooling-water duct 6 is with to vacuumize direction contrary, and the shape of cooling-water duct 6 is helical form.The arrangement of the thermocouple for accommodating thermocouple assembly 3 pipe 4 that can vertically be inserted therein is equipped with at the top of described vacuum chamber 1, this thermocouple settles pipe 4 to be specially thin-wall stainless steel, and correspondence is located on the axis direction of vacuum chamber 1, the axial thread section that this thermocouple settles pipe 4 to be arranged by its outer peripheral face is threaded with the gland 5 at vacuum chamber 1 top, so that employee's dismounting, and the degree of depth in its insertion vacuum chamber 1 adjustable, described thermocouple settles the vertical range D extracting section 7 outlet port bottom pipe 4 cecum with described vacuum out to be 10 ~ 30mm.Described thermocouple assembly 3 correspondence is inserted into this thermocouple and settles in pipe 4, and the control centre of connecting plastic extruder, when the temperature that thermocouple assembly 3 detects in vacuum chamber 1 exceedes design temperature, control centre can export sound and light alarm, reminding employees is cleared up in time, not only increase qualification rate and the production efficiency of finished product like this, the loss of vaccum-pumping equipment spare part in common can also be reduced, extend vacuum equipment service life; In addition, the thermocouple assembly 3 described in the present embodiment also can 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 temperature in vacuum chamber 1, accurately exporting returning charge and reporting 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 Small molecular volatile matter during melt-processed in barrel, Small molecular volatile matter can enter vacuum-pumping tube 2 under the suction function of vacuum chamber 1 afterwards, now, flowing in the cooling water of cooling circulating water constantly in vacuum-pumping tube 2 perisporium logical 6, such Small molecular volatile matter can be cooled after circulating water and enter follow-up vacuum equipment again when vacuum-pumping tube 2, and enter again after condensation in vacuum equipment and vacuumize main line, in this process, thermocouple assembly 3 can detect vacuum indoor temperature in real time, and temperature information is fed back to control centre as electronic signals, and be presented on plastic extruder touch-screen, when there is vacuum returning charge, the temperature that thermocouple assembly 3 detects can raise and exceed setting value suddenly, now, the PLC of control centre can provide sound and light alarm signal after judging, vacuum can be cleared up in time abnormal after employee finds sound and light alarm, to avoid producing defective work.
After the above scheme of employing, the present invention has set up water cooling part (fast and effeciently can reduce the temperature of Small molecular volatile matter and returning charge) and temperature detection part (can detect vacuum indoor temperature in real time, report to the police so that returning charge accurately can be exported), this compared to existing technology, of the present invention reliably rational in infrastructure, cost is low, easy to use, successful, when vacuum returning charge exceedes design temperature, alarm will send sound and light alarm, reminding employees is cleared up in time, not only increase qualification rate and the production efficiency of finished product like this, the loss of vaccum-pumping equipment spare part in common can also be reduced, extend vacuum equipment service life.Therefore, comprehensively, 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 preferred embodiment of the present invention, not limit practical range of the present invention with this, therefore the change 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 being positioned at screw tube of plastic extruding machine back segment and extract section (7) out, and be vertically mounted on the vacuum chamber (1) that described vacuum extracts section (7) top, outlet port out, it is characterized in that: the outlet port place of described vacuum chamber (1) is configured with the vacuum-pumping tube (2) of band cooling-water duct (6), pipe (4) settled by the thermocouple be provided with in described vacuum chamber (1) for accommodating thermocouple assembly (3), and 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 be arranged 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 settles the vertical range D extracting section (7) outlet port bottom pipe (4) cecum with described vacuum out to be 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) to be 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: described vacuum-pumping tube (2) downward-sloping setting.
8. the structure-improved of a kind of screw tube vacuum chamber of plastic extruding machine according to any one of claim 1 to 7, is characterized in that: the water (flow) direction of described cooling-water duct (6) is with to vacuumize direction contrary.
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 CN103538230A (en) | 2014-01-29 |
| CN103538230B true CN103538230B (en) | 2015-12-16 |
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Families Citing this family (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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| 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 |
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| CN103538230A (en) | 2014-01-29 |
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