CN105479719A - Weighing and weight losing integrated extrusion control system and method - Google Patents
Weighing and weight losing integrated extrusion control system and method Download PDFInfo
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- CN105479719A CN105479719A CN201610053222.9A CN201610053222A CN105479719A CN 105479719 A CN105479719 A CN 105479719A CN 201610053222 A CN201610053222 A CN 201610053222A CN 105479719 A CN105479719 A CN 105479719A
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- weightless
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- 238000005303 weighing Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001125 extrusion Methods 0.000 title abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 75
- 235000012438 extruded product Nutrition 0.000 claims abstract description 61
- 238000003756 stirring Methods 0.000 claims description 33
- 238000003860 storage Methods 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 230000003993 interaction Effects 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 241000209094 Oryza Species 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 6
- 230000008447 perception Effects 0.000 claims description 6
- 235000009566 rice Nutrition 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 229920006267 polyester film Polymers 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/286—Raw material dosing
-
- 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
- B29C48/355—Conveyors for extruded articles
-
- 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
- B29C2948/92504—Controlled parameter
- B29C2948/9258—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a weighing and weight losing integrated extrusion control system and method. The system conducts automatic matching on raw materials through a PLC, a raw material matching unit and a weighing sensor, the rotating speed of a threaded rod of an extruder is regulated through the PLC, an extrusion rotating speed control unit and an extrusion driver so that raw materials can be automatically extruded, the yield of extruded products is controlled to reach the set yield value and be kept stable, the rotating speed of a traction device is regulated through the PLC, a traction rotating speed control unit and a traction frequency converter so that automatic traction can be achieved for the extruded products, and the thickness or the gram weight of the extruded products can be kept stable. By means of the weighing and weight losing integrated extrusion control system and method, raw materials can be automatically and precisely matched, the quality of the products is improved, it is ensured that the yield of the extruded products is stable, the service life of the threaded rod of the extruder is prolonged, the stability of the thickness or gram weight of the extruded products is ensured, and the accuracy and stability of the products are improved.
Description
Technical field
The present invention relates to polyester film production equipment technical field, be specifically related to one weightless integral type of weighing and extrude control system and method.
Background technology
Polyester film take PETG as raw material, extrusion molding is adopted to make sheet, again through a kind of macromolecule plastic film that biaxial tension is made, at present, polyester film production equipment is primarily of elevating hopper, storage bin, metering valve, mechanical agitation blender, the formation such as extruder and draw-gear, but there is pulp furnish inaccuracy in existing polyester film production equipment, extruder screw wearing and tearing cause the goods output instability extruded, Product Precision is not high, do not reach the requirement of technological parameter, extruder screw service life the problem such as short and waste of raw materials.
Summary of the invention
Technical problem to be solved by this invention is just to provide one weightless integral type of weighing and extrudes control system and method, accurate proportioning automatically can be carried out to raw material, and the rotating speed of extruder screw is automatically adjusted according to the wear condition of extruder screw, make the stable yield of extruded product, Product Precision is high, save raw material, there is very strong practicality.
According to one aspect of the present invention, provide one weightless integral type of weighing and extrude control system, described system comprises man-machine interaction unit, PLC, pulp furnish unit, scale pan control unit, motor control unit, extrudes rotary speed controling unit, traction rotary speed controling unit, metering valve, the scale pan, LOAD CELLS, weightless bucket, weightless sensor, stirring motor, extruder, draw-gear, extrude driver and traction frequency convertor;
Described man-machine interaction unit, for PLC input product setup parameter, wherein, described product setup parameter at least comprises the setting yield values of extruder in setting-up time;
Described weightless sensor, is arranged at weightless bottom of the barrel, for the weight signal in the weightless bucket of perception, and weight signal is sent to PLC and scale pan control unit;
Described PLC, for obtaining the proportioning weight of various raw material and the setting speed value of draw-gear according to described product setup parameter, and obtains the actual production value of extruder in setting-up time according to the weight signal in described weightless bucket; Also for calculating the setting speed value of extruder screw according to the setting yield values of extruder in the setting-up time in the actual production value of extruder in described setting-up time and product setup parameter;
Described LOAD CELLS, is arranged at bottom the scale pan, for the weight signal of the perception scale pan, and the weight signal of the described scale pan is sent to pulp furnish unit;
Described pulp furnish unit, for the various raw materials that send according to described PLC proportioning weight, store different material multiple storage vats bottom the flow speed value preset of multiple metering valves installed of one_to_one corresponding and the weight signal of the described scale pan, obtain the opening time of multiple described metering valve, control the open and close of multiple described metering valve successively, make different raw materials fall into the scale pan successively from multiple storage vat, complete pulp furnish;
Described scale pan control unit, for judging weight signal in the weightless bucket that described weightless sensor sends whether lower than the lower limit of setting, if, then open the scale pan by feedstock transportation to the weightless bucket be arranged in immediately below the scale pan, until described weight signal reaches or higher than the higher limit of setting, otherwise do not open the scale pan; Also for sending scale pan opening signal when opening the scale pan to motor control unit;
Described motor control unit, for after receiving described scale pan opening signal, the stirring motor controlled in weightless bucket stirs the raw material in weightless bucket;
Describedly extrude driver, for adjusting the rotating speed of extruder screw under the control of extruding rotary speed controling unit;
Describedly extrude rotary speed controling unit, for the setting speed value of described extruder screw sent according to described PLC, and in conjunction with the actual speed value of extruder screw, extrude the rotating speed of driver adjustment extruder screw described in control, the output of the extruded product obtained to make extruder reaches the setting yield values of extruder in described setting-up time;
Described traction frequency convertor, for adjusting the rotating speed of draw-gear under the control of traction rotary speed controling unit;
Described traction rotary speed controling unit, for the setting speed value according to the actual speed value of draw-gear and the described draw-gear of described PLC transmission, control the rotating speed of described traction frequency convertor adjustment draw-gear, make it reach the setting speed value of described draw-gear, to make draw-gear, the described extruded product that extruder obtains is drawn to obtain thickness or the heavily stable extruded product of Mick.
According to another aspect of the present invention, provide one weightless integral type of weighing and extrude control method, said method comprising the steps of:
S1, PLC obtain the proportioning weight of various raw material and the setting speed value of draw-gear according to the product setup parameter of input, and the proportioning weight of described various raw material is sent to pulp furnish unit, and the setting speed value of described draw-gear is sent to traction rotary speed controling unit, wherein, described product setup parameter at least comprises the setting yield values of extruder in setting-up time;
The flow speed value preset of multiple metering valves that S2, described pulp furnish unit are installed according to one_to_one corresponding bottom multiple storage vats of the proportioning weight of described various raw material, the weight signal being arranged at the scale pan that the LOAD CELLS bottom the scale pan sends and storage different material, obtain the opening time of multiple described metering valve, control the open and close of multiple described metering valve successively, make different raw materials fall into the scale pan successively from multiple storage vat, complete pulp furnish;
S3, after pulp furnish terminates, scale pan control unit receive and weight signal in the weightless bucket that sends of the weightless sensor judging to be arranged at weightless bottom of the barrel whether lower than the lower limit of setting, if, then open the scale pan by feedstock transportation to the weightless bucket be arranged in immediately below the scale pan, until described weight signal reaches or higher than setting higher limit, otherwise do not open the scale pan, and send scale pan opening signal when opening the scale pan to motor control unit;
S4, motor control unit are after receiving described scale pan opening signal, the stirring motor controlled in weightless bucket stirs the raw material in weightless bucket, raw material after stirring falls into the spout of extruder from weightless bottom of the barrel, and extruder is extruded the raw material after the described stirring in spout and obtained extruded product;
S5, PLC obtain the actual production value of extruder in setting-up time according to the weight signal in the weightless bucket of described weightless sensor transmission, and calculate the setting speed value of extruder screw according to the setting yield values of extruder in the described setting-up time in the actual production value of extruder in described setting-up time and described product setup parameter, and send it to and extrude rotary speed controling unit;
S6, described in extrude the setting speed value of rotary speed controling unit according to described extruder screw, and in conjunction with the actual speed value of extruder screw, control the rotating speed extruding driver adjustment extruder screw, the output of the extruded product obtained to make extruder reaches the setting yield values of extruder in described setting-up time;
S7, draw-gear draw described extruded product, the setting speed value of the described draw-gear that described traction rotary speed controling unit sends according to described PLC and the actual speed value of draw-gear, control the rotating speed of traction frequency convertor adjustment draw-gear, making it reach the setting speed value of described draw-gear, obtaining thickness or the heavily stable extruded product of Mick when drawing described extruded product to make draw-gear.
One provided by the invention weightless integral type of weighing extrudes control system and method, according to product setup parameter, adopt PLC, pulp furnish unit and LOAD CELLS carry out automatic mixing to raw material, and adopt PLC, extrude rotary speed controling unit and extrude driver to adjust the rotating speed of extruder screw, to carry out automatic-extrusion to raw material, and the output controlling extruded product makes its yield values reaching setting and keeps the stable of output, pass through PLC, traction rotary speed controling unit and traction frequency convertor adjust the rotating speed of draw-gear, automatically to draw the goods extruded, the thickness of described extruded product or Mick is made heavily to keep stable.The present invention can carry out proportioning automatically and accurately according to the requirement of setting to raw material, reach the technological parameter requirement of product, improve the quality of product, and can according to the wear condition of extruder screw, the mode of closed loop feedback is adopted to adjust the rotating speed of extruder screw in real time, solve the problem of the extruded product production declining caused because of the wearing and tearing of extruder screw, ensure the stable yield of extruded product, increase the service time of extruder screw, the mode of same employing closed loop feedback adjusts the rotating speed of draw-gear in real time, and thickness or the Mick of guarantee extruded product are heavily stable; And the minimum of a value thickness of described extruded product is set in the margin of tolerance of permission, reduce raw-material loss, and improve precision and the stability of product.
Accompanying drawing explanation
Fig. 1 is that the one of the embodiment of the present invention one weightless integral type of weighing extrudes Control system architecture figure;
Fig. 2 is that the one of the embodiment of the present invention two weightless integral type of weighing extrudes control method flow chart.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment one, one weightless integral type of weighing extrudes control system.Below in conjunction with Fig. 1, system provided by the invention is described in detail.
See Fig. 1, system provided by the invention comprises man-machine interaction unit, PLC, pulp furnish unit, scale pan control unit, motor control unit, extrudes rotary speed controling unit, draws rotary speed controling unit, warning circuit unit, storage vat, metering valve, the scale pan, LOAD CELLS, weightless bucket, weightless sensor, stirring motor, extruder, draw-gear, extrudes driver and traction frequency convertor.
Described storage vat has multiple, a kind of raw material is stored in each storage vat, multiple storage vat and multiple metering valve one_to_one corresponding, each metering valve is arranged on the bottom of corresponding storage vat, the described scale pan is positioned at immediately below multiple described metering valve, described LOAD CELLS is arranged on the bottom of the described scale pan, described weightless bucket is positioned at immediately below the described scale pan, described weightless sensor is arranged on the bottom of described weightless bucket, described stirring motor is positioned at the inside of described weightless bucket, described extruder is positioned at immediately below described weightless bucket, described draw-gear and described extruder are mechanically connected.
Described man-machine interaction unit, for PLC input product setup parameter, wherein, described product setup parameter at least comprises the setting yield values of extruder in setting-up time.
Described weightless sensor, is arranged at weightless bottom of the barrel, for the weight signal in the weightless bucket of perception, and the weight signal in weightless bucket is sent to PLC and scale pan control unit.
Described PLC, for obtaining the proportioning weight of various raw material and the setting speed value of draw-gear according to described product setup parameter, and obtains the actual production value of extruder in setting-up time according to the weight signal in described weightless bucket; Also for calculating the setting speed value of extruder screw according to the setting yield values of extruder in the setting-up time in the actual production value of extruder in described setting-up time and product setup parameter.
Concrete, the proportioning weight of described various raw material is sent to described pulp furnish unit by described PLC, the setting speed value of described draw-gear is sent to described traction rotary speed controling unit, described in also the setting speed value of described extruder screw being sent to, extrudes rotary speed controling unit.
Described product setup parameter specifically comprises the setting yield values of extruder in setting-up time, the scale parameter of various raw material, the width of extruded product, the density of various raw material and the thickness of extruded product or Mick heavily etc., and the thickness of described extruded product or Mick are reseted the minimum of a value be set in the margin of tolerance of permission, obtain high accuracy thickness or Mick extruded product heavily to make draw-gear.
The remote computer that described man-machine interaction unit is connected specifically by EPA interface, the mobile terminal accessed by RCI or the keys/display interface of this locality accessed by local interface.
Described LOAD CELLS, is arranged at bottom the scale pan, for the weight signal of the perception scale pan, and the weight signal of the described scale pan is sent to pulp furnish unit.
Described pulp furnish unit, for the various raw materials that send according to described PLC proportioning weight, store different material multiple storage vats bottom the flow speed value preset of multiple metering valves installed of one_to_one corresponding and the weight signal of the described scale pan, obtain the opening time of multiple described metering valve, control the open and close of multiple described metering valve successively, make different raw materials fall into the scale pan successively from multiple storage vat, complete pulp furnish.
Concrete, the proportioning weight of the various raw materials that described pulp furnish unit sends according to described PLC, store different material multiple storage vats bottom the weight signal that sends of LOAD CELLS bottom the flow speed value preset of multiple metering valves installed of one_to_one corresponding and the scale pan, calculate the opening time of multiple described metering valve corresponding to various raw material; And according to described opening time, control the open and close of multiple described metering valve successively, different raw materials is made to fall into the scale pan successively from multiple storage vat, until the weight signal that described LOAD CELLS sends is identical with the gross weight of described various raw material, pulp furnish terminates, and obtain the correction flow speed value of multiple described metering valve, using the flow speed value preset as multiple described metering valve during pulp furnish next time; Wherein, the flow speed value preset of multiple described metering valve during first time pulp furnish is that the raw material weight flowed out according to metering valve after metering valve is opened the unit interval obtains.
Described scale pan control unit, for judging weight signal in the weightless bucket that described weightless sensor sends whether lower than the lower limit of setting, if, then open the scale pan by feedstock transportation to the weightless bucket be arranged in immediately below the scale pan, until described weight signal reaches or higher than the higher limit of setting, otherwise do not open the scale pan; Also for sending scale pan opening signal when opening the scale pan to motor control unit.
Concrete, described scale pan control unit, weight signal in the weightless bucket that the weightless sensor installed for receiving weightless bottom of the barrel sends, and judge that whether described weight signal is lower than the lower limit set, if lower than the lower limit of setting, then open the scale pan by feedstock transportation to the weightless bucket be arranged in immediately below the scale pan, then close the scale pan and proceed proportioning to make described pulp furnish unit, repeat said process, until described weight signal reaches or higher than setting higher limit; If be not less than the lower limit of setting, then do not open the scale pan, continue to wait for until described weight signal is lower than the lower limit set; Also for sending scale pan opening signal when opening the scale pan to motor control unit.
Described motor control unit, for after receiving described scale pan opening signal, the stirring motor controlled in weightless bucket stirs the raw material in weightless bucket.
Concrete, described motor control unit is used for after the scale pan opening signal receiving the transmission of described scale pan control unit, and the stirring motor controlled in weightless bucket stirs the raw material in weightless bucket, after Preset Time, control described stirring motor to close, raw material stirs and terminates, and obtains mixed material.
Describedly extrude driver, for adjusting the rotating speed of extruder screw under the control of extruding rotary speed controling unit.
Describedly extrude rotary speed controling unit, for the setting speed value of described extruder screw sent according to described PLC, and in conjunction with the actual speed value of extruder screw, extrude the rotating speed of driver adjustment extruder screw described in control, the output of the extruded product obtained to make extruder reaches the setting yield values of extruder in described setting-up time.
Described traction frequency convertor, for adjusting the rotating speed of draw-gear under the control of traction rotary speed controling unit.
Described traction rotary speed controling unit, for the setting speed value according to the actual speed value of draw-gear and the described draw-gear of described PLC transmission, control the rotating speed of described traction frequency convertor adjustment draw-gear, make it reach the setting speed value of described draw-gear, to make draw-gear, the described extruded product that extruder obtains is drawn to obtain thickness or the heavily stable extruded product of Mick.
Described system also comprises extruder speed measuring coder, is arranged at above extruder, for output pulse signal.
Described system also comprises traction rice counting wheel, is arranged at above draw-gear, for exporting draw-gear feedback signal.
Described system also comprises actual speed and to test the speed unit, and the pulse signal for exporting according to extruder speed measuring coder obtains the actual speed value of extruder, and send it to described PLC and described in extrude rotary speed controling unit; Draw-gear feedback signal also for exporting according to traction rice counting wheel obtains the actual speed value of described draw-gear, and sends it to described traction rotary speed controling unit.
Described system also comprises warning circuit unit, for carrying out warning reminding in an abnormal situation.
In addition, described PLC is also for feeding back to described man-machine interaction unit by the work state information of extruder, wherein, the work state information of described extruder specifically comprises the information such as the actual production value of extruder in setting-up time and the actual speed value of setting yield values and extruder.
Embodiment two, one weightless integral type of weighing extrudes control method.Below in conjunction with Fig. 2, method provided by the invention is described in detail.
See Fig. 2, S1, PLC obtain the proportioning weight of various raw material and the setting speed value of draw-gear according to the product setup parameter of input, and the proportioning weight of described various raw material is sent to pulp furnish unit, and the setting speed value of described draw-gear is sent to traction rotary speed controling unit, wherein, described product setup parameter at least comprises the setting yield values of extruder in setting-up time.
Concrete, man-machine interaction unit is to PLC input product setup parameter, described product setup parameter at least comprises the setting yield values of extruder in setting-up time, described PLC obtains the proportioning weight of various raw material and the setting speed value of draw-gear according to described product setup parameter, and the proportioning weight of described various raw material is sent to pulp furnish unit, and the setting speed value of described draw-gear is sent to traction rotary speed controling unit, wherein, the remote computer that described man-machine interaction unit is connected specifically by EPA interface, the mobile terminal accessed by Long-distance Control or the keys/display interface accessed by local interface.
In addition, the operational data information feed back of extruder is also given described man-machine interaction unit by described PLC, wherein, the work state information of described extruder specifically comprises the information such as the actual production value of extruder in setting-up time and the actual speed value of setting yield values and extruder.
Described product setup parameter specifically comprises the setting yield values of extruder in setting-up time, the scale parameter of various raw material, the width of extruded product, the density of various raw material, the thickness of extruded product or Mick weight, and the thickness of described extruded product or Mick are reseted the minimum of a value be set in the margin of tolerance of permission, obtain high accuracy thickness or Mick extruded product heavily to make draw-gear.
The flow speed value preset of multiple metering valves that S2, described pulp furnish unit are installed according to one_to_one corresponding bottom multiple storage vats of the proportioning weight of described various raw material, the weight signal being arranged at the scale pan that the LOAD CELLS bottom the scale pan sends and storage different material, obtain the opening time of multiple described metering valve, control the open and close of multiple described metering valve successively, make different raw materials fall into the scale pan successively from multiple storage vat, complete pulp furnish.
Concrete, the flow speed value preset of multiple metering valves that described pulp furnish unit is installed according to one_to_one corresponding bottom multiple storage vats of the proportioning weight of described various raw material, the weight signal being arranged at the scale pan that the LOAD CELLS bottom the scale pan sends and storage different material, calculates the opening time of multiple described metering valve corresponding to various raw material; Then the flow velocity adjusting multiple described metering valve makes it reach described setting flow speed value, and according to the opening time of metering valve corresponding to described various raw material, control the open and close of multiple described metering valve successively, different raw materials is made to fall into the scale pan successively from multiple storage vat, until the weight signal that described LOAD CELLS sends is identical with the gross weight of described various raw material, pulp furnish terminates, and obtain the correction flow speed value of multiple described metering valve, using the flow speed value preset as multiple described metering valve during pulp furnish next time; Wherein, the flow speed value preset of multiple described metering valve during first time pulp furnish is that the raw material weight flowed out according to metering valve after metering valve is opened the unit interval obtains.
S3, after pulp furnish terminates, scale pan control unit receive and weight signal in the weightless bucket that sends of the weightless sensor judging to be arranged at weightless bottom of the barrel whether lower than the lower limit of setting, if, then open the scale pan by feedstock transportation to the weightless bucket be arranged in immediately below the scale pan, until described weight signal reaches or higher than setting higher limit, otherwise do not open the scale pan, and send scale pan opening signal when opening the scale pan to motor control unit.
Concrete, after pulp furnish terminates, scale pan control unit receives the weight signal in the weightless bucket of the weightless sensor transmission that weightless bottom of the barrel is installed, and judge that whether described weight signal is lower than the lower limit set, if lower than the lower limit of setting, then open the scale pan by feedstock transportation to the weightless bucket be arranged in immediately below the scale pan, then close the scale pan and proceed proportioning to make described pulp furnish unit, repeat said process, until described weight signal reaches or higher than setting higher limit; If be not less than the lower limit of setting, then do not open the scale pan, continue to wait for until described weight signal is lower than the lower limit set; And send scale pan opening signal when opening the scale pan to motor control unit.
S4, motor control unit are after receiving described scale pan opening signal, the stirring motor controlled in weightless bucket stirs the raw material in weightless bucket, raw material after stirring falls into the spout of extruder from weightless bottom of the barrel, and extruder is extruded the raw material after the described stirring in spout and obtained extruded product.
Concrete, motor control unit is after the scale pan opening signal receiving the transmission of described scale pan control unit, control stirring motor startup to stir the various raw materials in weightless bucket, after Preset Time, described motor control unit controls described stirring motor and closes, raw material stirs and terminates, and the raw material after stirring falls into the spout of extruder from weightless bottom of the barrel, and extruder is extruded the raw material after the described stirring in spout and obtained extruded product.
S5, PLC obtain the actual production value of extruder in setting-up time according to the weight signal in the weightless bucket of described weightless sensor transmission, and calculate the setting speed value of extruder screw according to the setting yield values of extruder in the described setting-up time in the actual production value of extruder in described setting-up time and described product setup parameter, and send it to and extrude rotary speed controling unit.
Concrete, described PLC is according to the weight signal in the described weightless bucket of described weightless sensor transmission, calculate the weight of the raw material after the described stirring that weightless bucket in setting-up time loses, namely actual in extruder setting-up time extruded product yield values.
The actual speed value of described extruder screw is that the pulse signal exported according to extruder speed measuring coder obtains.
S6, described in extrude the setting speed value of rotary speed controling unit according to described extruder screw, and in conjunction with the actual speed value of extruder screw, control the rotating speed extruding driver adjustment extruder screw, the output of the extruded product obtained to make extruder reaches the setting yield values of extruder in described setting-up time.
S7, draw-gear draw described extruded product, the setting speed value of the described draw-gear that described traction rotary speed controling unit sends according to the actual speed value of draw-gear and described PLC, control the rotating speed of traction frequency convertor adjustment draw-gear, making it reach the setting speed value of described draw-gear, obtaining thickness or the heavily stable extruded product of Mick when drawing described extruded product to make draw-gear.
Concrete, draw-gear draws to described extruded product the thickness or the Mick weight that control described extruded product, the setting speed value of the described draw-gear that described traction rotary speed controling unit sends according to the actual speed value of draw-gear and described PLC, control the rotating speed of traction frequency convertor adjustment draw-gear, it is made to reach the setting speed value of described draw-gear, thickness or the heavily stable extruded product of Mick is obtained to make draw-gear, wherein, the actual speed value of described draw-gear is that the draw-gear feedback signal exported according to traction rice counting wheel obtains.
One provided by the invention weightless integral type of weighing extrudes control system and method, according to product setup parameter, adopt PLC, pulp furnish unit and LOAD CELLS carry out automatic mixing to raw material, and adopt PLC, extrude rotary speed controling unit and extrude driver to adjust the rotating speed of extruder screw, to carry out automatic-extrusion to raw material, and the output controlling extruded product makes its yield values reaching setting and keeps the stable of output, pass through PLC, traction rotary speed controling unit and traction frequency convertor adjust the rotating speed of draw-gear, automatically to draw the goods extruded, the thickness of described extruded product or Mick is made heavily to keep stable.The present invention can carry out proportioning automatically and accurately according to the requirement of setting to raw material, reach the technological parameter requirement of product, improve the quality of product, and can according to the wear condition of extruder screw, the mode of closed loop feedback is adopted to adjust the rotating speed of extruder screw in real time, solve the problem of the extruded product production declining caused because of the wearing and tearing of extruder screw, ensure the stable yield of extruded product, increase the service time of extruder screw, the mode of same employing closed loop feedback adjusts the rotating speed of draw-gear in real time, and thickness or the Mick of guarantee extruded product are heavily stable; And the thickness of described extruded product or Mick are reseted the minimum of a value be set in the margin of tolerance of permission, reduce raw-material loss, and improve precision and the stability of product.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a weightless integral type of weighing extrudes control system, it is characterized in that, described system comprises man-machine interaction unit, PLC, pulp furnish unit, scale pan control unit, motor control unit, extrudes rotary speed controling unit, draws rotary speed controling unit, metering valve, the scale pan, LOAD CELLS, weightless bucket, weightless sensor, stirring motor, extruder, draw-gear, extrudes driver and traction frequency convertor;
Described man-machine interaction unit, for PLC input product setup parameter, wherein, described product setup parameter at least comprises the setting yield values of extruder in setting-up time;
Described weightless sensor, is arranged at weightless bottom of the barrel, for the weight signal in the weightless bucket of perception, and the weight signal in weightless bucket is sent to PLC and scale pan control unit;
Described PLC, for obtaining the proportioning weight of various raw material and the setting speed value of draw-gear according to described product setup parameter, and obtains the actual production value of extruder in setting-up time according to the weight signal in described weightless bucket; Also for calculating the setting speed value of extruder screw according to the setting yield values of extruder in the setting-up time in the actual production value of extruder in described setting-up time and product setup parameter;
Described LOAD CELLS, is arranged at bottom the scale pan, for the weight signal of the perception scale pan, and the weight signal of the described scale pan is sent to pulp furnish unit;
Described pulp furnish unit, for the various raw materials that send according to described PLC proportioning weight, store different material multiple storage vats bottom the flow speed value preset of multiple metering valves installed of one_to_one corresponding and the weight signal of the described scale pan, obtain the opening time of multiple described metering valve, control the open and close of multiple described metering valve successively, make different raw materials fall into the scale pan successively from multiple storage vat, complete pulp furnish;
Described scale pan control unit, for judging weight signal in the weightless bucket that described weightless sensor sends whether lower than the lower limit of setting, if, then open the scale pan by feedstock transportation to the weightless bucket be arranged in immediately below the scale pan, until described weight signal reaches or higher than the higher limit of setting, otherwise do not open the scale pan; Also for sending scale pan opening signal when opening the scale pan to motor control unit;
Described motor control unit, for after receiving described scale pan opening signal, the stirring motor controlled in weightless bucket stirs the raw material in weightless bucket;
Describedly extrude driver, for adjusting the rotating speed of extruder screw under the control of extruding rotary speed controling unit;
Describedly extrude rotary speed controling unit, for the setting speed value of described extruder screw sent according to described PLC, and in conjunction with the actual speed value of extruder screw, extrude the rotating speed of driver adjustment extruder screw described in control, the output of the extruded product obtained to make extruder reaches the setting yield values of extruder in described setting-up time;
Described traction frequency convertor, for adjusting the rotating speed of draw-gear under the control of traction rotary speed controling unit;
Described traction rotary speed controling unit, for the setting speed value according to the actual speed value of draw-gear and the described draw-gear of described PLC transmission, control the rotating speed of described traction frequency convertor adjustment draw-gear, make it reach the setting speed value of described draw-gear, to make draw-gear, the described extruded product that extruder obtains is drawn to obtain thickness or the heavily stable extruded product of Mick.
2. one as claimed in claim 1 weightless integral type of weighing extrudes control system, it is characterized in that, described man-machine interaction unit is the remote computer be connected by EPA interface, the mobile terminal accessed by RCI or the keys/display interface of this locality accessed by local interface.
3. one as claimed in claim 2 weightless integral type of weighing extrudes control system, and it is characterized in that, described PLC is also for giving described man-machine interaction unit by the operational data information feed back of extruder.
4. one as claimed in claim 1 weightless integral type of weighing extrudes control system, and it is characterized in that, described system also comprises:
Extruder speed measuring coder, is arranged at above extruder, for output pulse signal;
Traction rice counting wheel, is arranged at above draw-gear, for exporting draw-gear feedback signal;
Actual speed tests the speed unit, and the pulse signal for exporting according to extruder speed measuring coder obtains the actual speed value of extruder, and send it to described PLC and described in extrude rotary speed controling unit; Draw-gear feedback signal also for exporting according to traction rice counting wheel obtains the actual speed value of described draw-gear, and sends it to described traction rotary speed controling unit.
5. one as claimed in claim 1 weightless integral type of weighing extrudes control system, it is characterized in that, thickness or the Mick weight of extruded product is also comprised in described product setup parameter, the thickness of described extruded product or Mick are reseted the minimum of a value be set in the margin of tolerance of permission, obtain high accuracy thickness or Mick extruded product heavily to make draw-gear.
6. weightless integral type of weighing extrudes a control method, it is characterized in that, said method comprising the steps of:
S1, PLC obtain the proportioning weight of various raw material and the setting speed value of draw-gear according to the product setup parameter of input, and the proportioning weight of described various raw material is sent to pulp furnish unit, and the setting speed value of described draw-gear is sent to traction rotary speed controling unit, wherein, described product setup parameter at least comprises the setting yield values of extruder in setting-up time;
The flow speed value preset of multiple metering valves that S2, described pulp furnish unit are installed according to one_to_one corresponding bottom multiple storage vats of the proportioning weight of described various raw material, the weight signal being arranged at the scale pan that the LOAD CELLS bottom the scale pan sends and storage different material, obtain the opening time of multiple described metering valve, control the open and close of multiple described metering valve successively, make different raw materials fall into the scale pan successively from multiple storage vat, complete pulp furnish;
S3, after pulp furnish terminates, scale pan control unit receive and weight signal in the weightless bucket that sends of the weightless sensor judging to be arranged at weightless bottom of the barrel whether lower than the lower limit of setting, if, then open the scale pan by feedstock transportation to the weightless bucket be arranged in immediately below the scale pan, until described weight signal reaches or higher than setting higher limit, otherwise do not open the scale pan, and send scale pan opening signal when opening the scale pan to motor control unit;
S4, motor control unit are after receiving described scale pan opening signal, the stirring motor controlled in weightless bucket stirs the raw material in weightless bucket, raw material after stirring falls into the spout of extruder from weightless bottom of the barrel, and extruder is extruded the raw material after the described stirring in spout and obtained extruded product;
S5, PLC obtain the actual production value of extruder in setting-up time according to the weight signal in the weightless bucket of described weightless sensor transmission, and calculate the setting speed value of extruder screw according to the setting yield values of extruder in the described setting-up time in the actual production value of extruder in described setting-up time and described product setup parameter, and send it to and extrude rotary speed controling unit;
S6, described in extrude the setting speed value of rotary speed controling unit according to described extruder screw, and in conjunction with the actual speed value of extruder screw, control the rotating speed extruding driver adjustment extruder screw, the output of the extruded product obtained to make extruder reaches the setting yield values of extruder in described setting-up time;
S7, draw-gear draw described extruded product, the setting speed value of the described draw-gear that described traction rotary speed controling unit sends according to the actual speed value of draw-gear and described PLC, control the rotating speed of traction frequency convertor adjustment draw-gear, making it reach the setting speed value of described draw-gear, obtaining thickness or the heavily stable extruded product of Mick when drawing described extruded product to make draw-gear.
7. one weightless integral type of weighing extrudes control method as claimed in claim 6, it is characterized in that, the remote computer that the described man-machine interaction unit in described step S1 is connected specifically by EPA interface, the mobile terminal accessed by RCI or the keys/display interface of this locality accessed by local interface.
8. one weightless integral type of weighing extrudes control method as claimed in claim 7, and it is characterized in that, described method also comprises:
The operational data information feed back of extruder is given described man-machine interaction unit by described PLC.
9. one weightless integral type of weighing extrudes control method as claimed in claim 6, it is characterized in that, the actual speed value of extruder screw described in described step S5 is that the pulse signal exported according to extruder speed measuring coder obtains;
The actual speed value of draw-gear described in described step S7 is that the draw-gear feedback signal exported according to traction rice counting wheel obtains.
10. one as claimed in claim 6 weightless integral type of weighing extrudes control method, it is characterized in that, thickness or the Mick weight of extruded product is also comprised in described product setup parameter, and the thickness of described extruded product or Mick are reseted the minimum of a value be set in the margin of tolerance of permission, obtain high accuracy thickness or Mick extruded product heavily to make draw-gear.
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| CN105479719B (en) | 2019-06-07 |
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