CN102407599B - High-precision method for controlling uniformity of discharging of extruder - Google Patents
High-precision method for controlling uniformity of discharging of extruder Download PDFInfo
- Publication number
- CN102407599B CN102407599B CN2011103978169A CN201110397816A CN102407599B CN 102407599 B CN102407599 B CN 102407599B CN 2011103978169 A CN2011103978169 A CN 2011103978169A CN 201110397816 A CN201110397816 A CN 201110397816A CN 102407599 B CN102407599 B CN 102407599B
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- extruder
- parameter
- controller
- draping
- rotating speed
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- 238000007599 discharging Methods 0.000 title claims abstract description 23
- 230000001276 controlling effect Effects 0.000 title abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000523 sample Substances 0.000 claims description 5
- 230000001105 regulatory Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000000875 corresponding Effects 0.000 abstract description 3
- 238000005303 weighing Methods 0.000 abstract 1
- 230000000903 blocking Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001172 regenerating Effects 0.000 description 1
- 230000033458 reproduction Effects 0.000 description 1
Classifications
-
- 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
- B29C2948/9218—Weight
-
- 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
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- 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
- B29C2948/92676—Weight
-
- 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
- B29C2948/92828—Raw material handling or dosing, e.g. active hopper or feeding device
-
- 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
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- 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
- B29C2948/92933—Conveying, transporting or storage of articles
Abstract
The invention discloses a high-precision method for controlling the uniformity of discharging of an extruder. The method comprises the following steps: inputting a grammage parameter of a product in a storage of a controller, utilizing the controller to collect and store the rotating speed of the screw of the extruder and the flow amount A of the raw materials in unit time metered by a weighing device at the last time; calculating the discharging amount B every time the screw of the extruder rotates for a circle based on the flow amount A of the raw materials in unit time, and utilizing the controller to adjust the rotating speed of a pull roll at any time according to the change of the B so as to meet the grammage parameter of the product. The method disclosed by the invention has the advantage of calculating the corresponding discharging amount every time the screw of the extruder rotates for a circle by using calculated weight (parameter A) of the raw materials entering the extruder in unit time in the prior art, thereby adjusting the rotating speed of the pull roll of the discharging port of the extruder; and when the discharging amount every time the screw of the extruder rotates for a circle has a certain deviation, the controller can adjust the rotating speed of the pull roll, thereby greatly improving the control precision which can be improved by one order of magnitude.
Description
Technical field
The present invention relates to the inhomogeneity high-accuracy control method of a kind of raising extruder discharging, be mainly used in the extruder of plastic extruder and other similar operation principles.
Background technology
Uniformity (every Mick number of the discharging of existing extruder (as plastic extruder) (as film, electric wire, cable, plastic tube, silk thread etc.), it is heavy to be commonly called as Mick) control, the unit interval that main employing is measured by meausring apparatus enters the raw material weight (hereinafter to be referred as the A parameter) in the extruder, the rotating speed of the discharging drawing roller of control outlet of extruder, when the A parameter increases above certain floating, the rotating speed of the corresponding raising carry-over pinch rolls of controller, vice versa.The shortcoming that this control method exists is: reach the raw material weight W that enters extruder in this time interval, A parameter=W/ △ t because meausring apparatus metering A parameter need be gathered certain time interval △ t.And should the time interval more big, the A parameter value of calculating be just more accurate.Could accordingly the rotating speed of carry-over pinch rolls be adjusted and controller calculates an A parameter at least, as seen, this control method control accuracy is very low, causes percent defective higher.
In addition, existing extruder is many or cause network blocking at the impurity of the long-term too high generation of temperature because of raw material (particularly regenerative raw materials) impurity, influence the uniformity of product, and causes the output reduction.
In the prior art, extruder screw long-term operation wearing and tearing also can reduce the extrusion capacity that the every fortune of extruder screw circles, thereby influence uniformity and the output of product.Shut down because a variety of causes causes outage, controller can not be remembered current (A parameter) data, needs to detect again and could run well, and has also influenced production efficiency.
In addition, when the output reduction occurring, can not in time find in the prior art, therefore also can reduce production efficiency.
Summary of the invention
The present invention aims to provide the inhomogeneity high-accuracy control method of a kind of raising extruder discharging, to solve the above-mentioned variety of issue that prior art exists.
Technical scheme of the present invention is: the inhomogeneity high-accuracy control method of a kind of raising extruder discharging, comprise controller, former hopper and meausring apparatus, it is characterized in that this control method may further comprise the steps: the heavy parameter of the Mick of input product in the holder of controller; The rotating speed of extruder screw and the up-to-date unit interval flow of raw materials A parameter once of meausring apparatus metering are gathered and stored to controller; Converse the extruder screw revolution load B parameter in a moving week by this unit interval flow of raw materials A parameter; Controller is regulated the rotating speed of carry-over pinch rolls at any time according to the variation of B parameter, with the heavy parameter of Mick that satisfies product.
Described meausring apparatus is electronic scale, by the raw material weight A parameter of measurement unit time inflow extruder, and the rotating speed of the carry-over pinch rolls of control outlet of extruder; The raw material weight A parameter that the up-to-date unit interval that once calculates flows into extruder substitutes this last parameter, and is stored in the holder of controller, as the basis of the moving all load B parameters of current calculating extruder screw revolution.
Described meausring apparatus is balance-type type, controller consumes the employed time of a scale hooper raw material by gathering, the weight of one scale hooper raw material calculates the raw material weight A parameter that the unit interval flows into extruder for default known quantity, and the rotating speed of the carry-over pinch rolls of control outlet of extruder; The raw material weight A parameter that the up-to-date unit interval that once calculates flows into extruder substitutes last A parameter, and is stored in the holder of controller, as the basis of the moving all load B parameters of current calculating extruder screw revolution.
The rotating speed of described extruder screw records by the speed probe that is installed in extruder screw one end, or passes through the output frequency signal acquisition of the frequency converter of control extruder screw rotating speed.
The user can set output hourly in controller, is below or above when setting output when controller detects current output, and controller carries out the output adjustment, namely adjusts the rotating speed of extruder screw and carry-over pinch rolls automatically to keep the yield values of setting; After several was carried out in above-mentioned output adjustment, controller sent draping and reports to the police and forced stoppage, and operating personnel carry out draping.
Call A parameter after the draping that stores after the last draping by being arranged on draping switch on the controller after the draping, enter normal working procedure subsequently; If start shooting after the draping for the first time, then start behind the draping switch by A parameter after the draping of controller collection start back extruder running in 1-10 minute, and storage automatically, call for after the next draping; Controller all detects storage A parameter after inferior draping after the draping each time, A parameter after the last draping that stores of replacement.
In described controller, store production management information, comprise product parameters, yield of unit time, output, operating personnel's title and the time on duty of section sometime, adopt menu-style to call above-mentioned various information.
Be provided with USB interface at described controller.
Advantage of the present invention is:
1, the unit interval of utilizing prior art to measure enters the interior raw material weight (A parameter) of extruder and converses the load that corresponding extruder screw whenever circles, accordingly the rotating speed of the carry-over pinch rolls of extruder discharging opening is adjusted, when certain deviation appears in the load that whenever circles when extruder screw, controller all can be adjusted the rotating speed of carry-over pinch rolls, improved control accuracy greatly, control accuracy can improve an order of magnitude.
2, since circulation memory up-to-date related parameter arranged, so the shutdown that causes because of a variety of causes, in 5-10 second when starting shooting again, just the current related parameter that has of computing turns round automatically, guarantees that product meets the Mick weight parameter of setting.
3, be installed in the speed probe of extruder screw one end, directly detect the rotating speed of extruder screw, be not subjected to the influence of any extruder screw transmission power source.
4, regulate the rotating speed of (raising) extruder screw and carry-over pinch rolls according to the network blocking degree automatically, guaranteed output, improved production efficiency, and can send network blocking and report to the police.
5, in time call parameter after the last draping after the draping, 5-10 normally moves second after the draping, has shortened detection and computing time (normally 5-30 minute this time) after the draping start, has further improved production efficiency.
6, utilize the various production informations that store that production process and product quality are carried out monitoring management, realize the fine-grained management of enterprise, greatly improve production efficiency and product quality.
Description of drawings
Fig. 1 is the structural representation of extruder of the present invention and an embodiment of control system;
Fig. 2 is the structural representation of extruder of the present invention and another embodiment of control system.
The specific embodiment
Referring to Fig. 1, a kind of this embodiment that improves the inhomogeneity high-accuracy control method of extruder discharging of the present invention, its implementation system comprises extruder 5, carry-over pinch rolls 7, controller 9, former hopper 1, dispensing valve 2 and meausring apparatus 3, the outlet of former hopper 1 is connected with the entrance of meausring apparatus 3 by dispensing valve 2, and the input of controller 9 is connected with the weight signal output of meausring apparatus 3 and the drive unit of dispensing valve 2 respectively with an output.Another output of controller 9 is connected (also can be controlled the rotating speed of carry-over pinch rolls 7 by servomotor by the pulsed quantity of controller 9 control servo-drivers) by frequency converter 8 with the drive motors of carry-over pinch rolls 7.
The screw speed of described extruder 5 records by the speed probe 6 that is installed in extruder screw one end, and the tach signal of speed probe 6 is transported to controller 9.
Referring to Fig. 2, this embodiment of the invention is except controlling the screw speed of extruder 5 by the frequency converter 10 of extruder, and other are identical with a last embodiment.
Control method of the present invention may further comprise the steps:
1, the heavy and output parameter of the Mick of input (setting) product in the holder of controller 9.
2, the rotating speed of extruder screw and the up-to-date unit interval flow of raw materials (be the raw material weight that enters the unit interval in the extruder, be called for short the A parameter) once of meausring apparatus 3 meterings are gathered and stored to controller 9, and make the A parameter satisfy the requirement of setting output.The actual production of extruder equals the A parameter and multiply by running time.
3, converse the extruder screw revolution load B in a moving week by this flow of raw materials A parameter:
Load B equals the A parameter divided by the rotating speed S of extruder screw in the △ t time, that is:
B=?（W/△t）÷（S/△t）=?W/S
4, controller 9 is regulated the rotating speed of carry-over pinch rolls 7, when (as the variation of power-supply fluctuation, raw material and extruder internal structure etc.) for some reason when causing the load B value variation in a moving week of extruder screw revolution, controller 9 is correspondingly regulated the rotating speed of carry-over pinch rolls 7 at any time, satisfies the heavy parameter of Mick to guarantee product.
5, the A parameter is in the mode of circulation memory, and namely each A parameter of calculating all stores (memory) in the holder of controller 9, substitutes the last A parameter that stores, as the basis of calculating the moving all load B of extruder screw revolution.
Meausring apparatus 3 of the present invention can be that ordinary electronic claims (the A parameter of adopts pressure sensor metering raw material), by the raw material weight of measurement unit time inflow extruder, and the rotating speed of the carry-over pinch rolls of control outlet of extruder.
Described meausring apparatus 3 also can be balance-type type, and (denomination of invention referring to my application is " controlling the device of extruder discharging unit weight automatically ", the patent application of notification number CN102229237A; Denomination of invention " the high precision in control device of extruder discharging unit weight " application number is " 201110335856.0 "), controller consumes the employed time of a scale hooper raw material by gathering, the weight of one scale hooper raw material is default known quantity, calculate the raw material weight that the unit interval flows into extruder, and the rotating speed of the carry-over pinch rolls of control outlet of extruder.
The user can set output hourly in controller 9, when controller detects current output and is below or above the certain percentage (as 1%-10%) of setting output (when the network blocking situation takes place), controller 9 carries out the output adjustment, namely adjusts the rotating speed of extruder screw and carry-over pinch rolls automatically to keep the yield values of setting.After (as 2-3 time) for several times carried out in above-mentioned output adjustment, controller 9 sent draping and reports to the police and forced stoppage, and operating personnel carry out draping.
Call A parameter after the draping that stores after the last draping by being arranged on draping switch on the controller after the draping, enter normal working procedure subsequently; If start shooting after the draping for the first time, then start behind the draping switch by A parameter after the draping of controller collection start back extruder running in 1-30 minute, and storage automatically, call for after the next draping; Controller all detects storage A parameter after inferior draping after the draping each time, A parameter after the last draping that stores of replacement.
Jumbo memory is installed in described controller 9, be used for storing production management information, comprise that product parameters (comprises the heavy parameter of Mick, size, the size of product comprises length, width, thickness, diameter), yield of unit time (weight), sometime the section output, sometime the section operating personnel's title, operating personnel's time on duty, adopt menu-style to call above-mentioned various information.
Also can be provided with USB interface at described controller 9, be convenient to the above-mentioned information reproductions that will controller store in 9 or transfer on the mobile memory.
Claims (7)
1. the inhomogeneity high-accuracy control method of raising extruder discharging comprises controller, former hopper and meausring apparatus, it is characterized in that, this control method may further comprise the steps: the heavy parameter of the Mick of input product in the holder of controller; The rotating speed of extruder screw and the up-to-date unit interval flow of raw materials A parameter once of meausring apparatus metering are gathered and stored to controller; Converse the extruder screw revolution load B parameter in a moving week by this unit interval flow of raw materials A parameter; Controller is regulated the rotating speed of carry-over pinch rolls at any time according to the variation of B parameter, with the heavy parameter of Mick that satisfies product;
The user sets output hourly in controller, is below or above when setting output when controller detects current output, and controller carries out the output adjustment, namely adjusts the rotating speed of extruder screw and carry-over pinch rolls automatically to keep the yield values of setting; After several was carried out in above-mentioned output adjustment, controller sent draping and reports to the police and forced stoppage, and operating personnel carry out draping.
2. the inhomogeneity high-accuracy control method of raising extruder according to claim 1 discharging, it is characterized in that, described meausring apparatus is electronic scale, by the raw material weight A parameter of measurement unit time inflow extruder, and the rotating speed of the carry-over pinch rolls of control outlet of extruder; The raw material weight A parameter that the up-to-date unit interval that once calculates flows into extruder substitutes this last parameter, and is stored in the holder of controller, as the basis of the moving all load B parameters of current calculating extruder screw revolution.
3. the inhomogeneity high-accuracy control method of raising extruder according to claim 1 discharging, it is characterized in that, described meausring apparatus is balance-type type, controller consumes the employed time of a scale hooper raw material by gathering, the weight of one scale hooper raw material is default known quantity, calculate the raw material weight A parameter that the unit interval flows into extruder, and the rotating speed of the carry-over pinch rolls of control outlet of extruder; The raw material weight A parameter that the up-to-date unit interval that once calculates flows into extruder substitutes last A parameter, and is stored in the holder of controller, as the basis of the moving all load B parameters of current calculating extruder screw revolution.
4. the inhomogeneity high-accuracy control method of raising extruder according to claim 1 discharging, it is characterized in that, the rotating speed of described extruder screw records by the speed probe that is installed in extruder screw one end, or passes through the output frequency signal acquisition of the frequency converter of control extruder screw rotating speed.
5. the inhomogeneity high-accuracy control method of raising extruder according to claim 1 discharging, it is characterized in that, call A parameter after the draping that stores after the last draping by being arranged on draping switch on the controller after the draping, enter normal working procedure subsequently; If start shooting after the draping for the first time, then start behind the draping switch by A parameter after the draping of controller collection start back extruder running in 1-10 minute, and storage automatically, call for after the next draping; Controller all detects storage A parameter after inferior draping after the draping each time, A parameter after the last draping that stores of replacement.
6. the inhomogeneity high-accuracy control method of raising extruder according to claim 1 discharging, it is characterized in that, in described controller, store production management information, comprise product parameters, yield of unit time, output, operating personnel's title and the time on duty of section sometime, adopt menu-style to call above-mentioned various information.
7. the inhomogeneity high-accuracy control method of raising extruder according to claim 6 discharging is characterized in that, is provided with USB interface at described controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103978169A CN102407599B (en) | 2011-12-05 | 2011-12-05 | High-precision method for controlling uniformity of discharging of extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103978169A CN102407599B (en) | 2011-12-05 | 2011-12-05 | High-precision method for controlling uniformity of discharging of extruder |
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| Publication Number | Publication Date |
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| CN102407599A CN102407599A (en) | 2012-04-11 |
| CN102407599B true CN102407599B (en) | 2013-08-07 |
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| CN2011103978169A Expired - Fee Related CN102407599B (en) | 2011-12-05 | 2011-12-05 | High-precision method for controlling uniformity of discharging of extruder |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422178B (en) * | 2012-05-16 | 2017-11-28 | 上海帝达机械设备有限公司 | A kind of metering control system |
| CN103439988B (en) * | 2013-08-20 | 2017-02-08 | 重庆鑫仕达包装设备有限公司 | Ratio automatic management and control system |
| CN109571999B (en) * | 2018-12-17 | 2021-04-30 | 浙江大学台州研究院 | Plastic composite fiber production equipment capable of automatically balancing pressure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1762682A (en) * | 2005-11-21 | 2006-04-26 | 王根乐 | Method for automatically controlling film thickness and film blowing machine carrying out the method |
| CN1817616A (en) * | 2006-03-27 | 2006-08-16 | 王根乐 | Method for controlling film thickness automatically and weighing device thereof |
| CN102229237A (en) * | 2011-06-03 | 2011-11-02 | 王根乐 | Device for automatically controlling discharge weight per unit length of extruder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2971733B2 (en) * | 1994-04-18 | 1999-11-08 | 積水化学工業株式会社 | Method of calculating extrusion rate of extruder for thermoplastic resin |
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2011
- 2011-12-05 CN CN2011103978169A patent/CN102407599B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1762682A (en) * | 2005-11-21 | 2006-04-26 | 王根乐 | Method for automatically controlling film thickness and film blowing machine carrying out the method |
| CN1817616A (en) * | 2006-03-27 | 2006-08-16 | 王根乐 | Method for controlling film thickness automatically and weighing device thereof |
| CN102229237A (en) * | 2011-06-03 | 2011-11-02 | 王根乐 | Device for automatically controlling discharge weight per unit length of extruder |
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| CN102407599A (en) | 2012-04-11 |
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