CN105479719B - A kind of weightless integral type of weighing squeezes out control system and method - Google Patents
A kind of weightless integral type of weighing squeezes out control system and method Download PDFInfo
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- CN105479719B CN105479719B CN201610053222.9A CN201610053222A CN105479719B CN 105479719 B CN105479719 B CN 105479719B CN 201610053222 A CN201610053222 A CN 201610053222A CN 105479719 B CN105479719 B CN 105479719B
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- weightless
- extruder
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- scale pan
- traction
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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
Abstract
The weightless integral type of a kind of weighing provided by the invention squeezes out control system and method, the system uses PLC controller, raw material proportioning unit and weighing sensor carry out automatic mixing to raw material, and use PLC controller, it squeezes out rotary speed controling unit and squeezes out driver to adjust the revolving speed of extruder screw, to carry out automatic-extrusion to raw material, and the yield for controlling extruded product reaches the yield values of setting and keeps the stabilization of yield, also pass through PLC controller, rotary speed controling unit and traction frequency convertor are drawn to adjust the revolving speed of traction device, it is drawn automatically with the product to extrusion, the thickness of the extruded product or Mick is set to keep stable again.The present invention can automatically and accurately match raw material, improve the quality of product, guarantee the stable yield of extruded product, and increase extruder screw uses the time, and guarantees that the thickness of extruded product or Mick are again stable, improve the precision and stability of product.
Description
Technical field
The present invention relates to polyester film production equipment technologies, and in particular to a kind of weightless integral type extrusion control of weighing
System and method.
Background technique
Polyester film is sheet to be made using extrusion molding, then through two-way drawing using polyethylene terephthalate as raw material
A kind of macromolecule plastic film made of stretching, currently, polyester film production equipment is mainly by elevating hopper, storage bin, metering valve, machine
Tool mixer, extruder and traction device etc. constitute, but existing polyester film production equipment there are raw material proportionings not
Accurately, extruder screw abrasion cause squeeze out product yield it is unstable, Product Precision is not high, wanting for technological parameter is not achieved
It asks, the problems such as extruder screw service life is short and waste of raw materials.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of weightless integral types of weighing to squeeze out control system and method,
The proportion of automatic and accurate can be carried out to raw material, and is turned according to the wear condition adjust automatically extruder screw of extruder screw
Speed makes the stable yield of extruded product, and Product Precision is high, saves raw material, has very strong practicability.
According to one aspect of the present invention, a kind of weightless integral type extrusion control system of weighing, the system packet are provided
It includes man-machine interaction unit, PLC controller, raw material proportioning unit, scale pan control unit, motor control unit, squeeze out revolving speed control
Unit, traction rotary speed controling unit, metering valve, the scale pan, weighing sensor, weightless bucket, weightless sensor, stirring motor, extrusion
Machine, squeezes out driver and traction frequency convertor at traction device；
The man-machine interaction unit is used for PLC controller input product setup parameter, wherein the product setting ginseng
Number includes at least the setting yield values of extruder in setting time；
The weightlessness sensor, is set to weightless bucket bottom, believes for perceiving the weight signal in weightless bucket, and by weight
Number it is sent to PLC controller and scale pan control unit；
The PLC controller, for obtaining filling with weight/power ratio and traction for various raw materials according to the product setup parameter
The setting speed value set, and the actual production of extruder in setting time is obtained according to the weight signal in the weightless bucket
Value；It is also used to squeeze in the setting time in the actual production value and product setup parameter according to extruder in the setting time
The setting speed value of extruder screw is calculated in the setting yield values of machine out；
The weighing sensor is set to scale pan bottom, for perceiving the weight signal of the scale pan, and by the weight of the scale pan
Amount signal is sent to raw material proportioning unit；
The raw material proportioning unit, various raw materials for being sent according to the PLC controller with weight/power ratio, storage not
Multiple storage vat bottoms with raw material correspond the preset flow speed value for the multiple metering valves installed and the weight of the scale pan
Signal is measured, the opening time of multiple metering valves is obtained, successively controls the open and close of multiple metering valves, make difference
Raw material successively fallen into the scale pan from multiple storage vats, complete raw material proportioning；
Whether the scale pan control unit, the weight signal in weightless bucket for judging the weightless sensor transmission are low
In the lower limit value of setting, if so, opening the scale pan for feedstock transportation to being located in the weightless bucket immediately below the scale pan, until described heavy
Amount signal reach or higher than setting upper limit value, otherwise do not open the scale pan；It is also used to send the scale pan when opening the scale pan and open
Signal is to motor control unit；
The motor control unit, for after receiving the scale pan opening signal, controlling the stirring electricity in weightless bucket
Machine is stirred the raw material in weightless bucket；
The extrusion driver, for adjusting the revolving speed of extruder screw under the control for squeezing out rotary speed controling unit；
The extrusion rotary speed controling unit, the setting of the extruder screw for being sent according to the PLC controller
Tachometer value, and the actual speed value of extruder screw is combined, the revolving speed for squeezing out driver adjustment extruder screw is controlled, with
The yield for the extruded product for obtaining extruder reaches the setting yield values of extruder in the setting time；
The traction frequency convertor, for adjusting the revolving speed of traction device under the control of traction rotary speed controling unit；
The traction rotary speed controling unit, for according to the actual speed value of traction device and PLC controller hair
The setting speed value of the traction device sent controls the revolving speed of the traction frequency convertor adjustment traction device, reaches institute
The setting speed value of traction device is stated, so that traction device draws to obtain thickness the extruded product that extruder obtains
Degree or Mick stable extruded product again.
Another aspect according to the present invention provides a kind of weightless integral type extrusion control method of weighing, the method packet
Include following steps:
S1, PLC controller according to the product setup parameter of input obtain various raw materials with weight/power ratio and traction device
Setting speed value, and the various raw materials are sent to raw material proportioning unit with weight/power ratio, and by the traction device
Setting speed value is sent to traction rotary speed controling unit, wherein the product setup parameter is included at least in setting time and squeezed out
The setting yield values of machine；
S2, the raw material proportioning unit are passed according to the weighing of the various raw materials matched weight/power ratio, be set to scale pan bottom
The weight signal for the scale pan that sensor is sent and the multiple storage vat bottoms for storing different material correspond multiple meters of installation
The preset flow speed value for measuring valve, obtains the opening time of multiple metering valves, successively controls the unlatching of multiple metering valves
It with closing, falls into different raw materials successively in the scale pan from multiple storage vats, completes raw material proportioning；
S3, after raw material proportioning terminates, scale pan control unit receives and judges to be set to the weightless of weightless bucket bottom and passes
Whether the weight signal in weightless bucket that sensor is sent is lower than the lower limit value of setting, if so, opening the scale pan for feedstock transportation extremely
In weightless bucket immediately below the scale pan, until the weight signal reach or higher than setting upper limit value, otherwise do not open
The scale pan, and scale pan opening signal is sent to motor control unit when opening the scale pan；
S4, motor control unit control the stirring motor in weightless bucket to mistake after receiving the scale pan opening signal
Raw material in weight bucket is stirred, and the raw material after stirring is from the spout that weightless bucket bottom falls into extruder, extruder pair
The raw material after the stirring in spout is squeezed out to obtain extruded product；
The weight signal in weightless bucket that S5, PLC controller are sent according to the weightless sensor obtains in setting time
The actual production value of extruder, and according in the actual production value of extruder in the setting time and the product setup parameter
The setting time in the setting yield values of extruder the setting speed value of extruder screw is calculated, and send it to
Squeeze out rotary speed controling unit；
S6, the rotary speed controling unit that squeezes out combine extruder spiral shell according to the setting speed value of the extruder screw
The actual speed value of bar, control squeeze out the revolving speed of driver adjustment extruder screw, so that the extruded product that extruder obtains
Yield reaches the setting yield values of extruder in the setting time；
S7, traction device draw the extruded product, and the traction rotary speed controling unit is controlled according to the PLC
The setting speed value for the traction device that device is sent and the actual speed value of traction device, control traction frequency convertor adjustment are led
The revolving speed of leading-in device reaches the setting speed value of the traction device so that traction device to the extruded product into
Thickness or Mick stable extruded product again are obtained when row traction.
The weightless integral type of a kind of weighing provided by the invention squeezes out control system and method is adopted according to product setup parameter
Automatic mixing is carried out to raw material with PLC controller, raw material proportioning unit and weighing sensor, and using PLC controller, extrusion
Rotary speed controling unit and driver is squeezed out to adjust the revolving speed of extruder screw, to carry out automatic-extrusion to raw material, and control
The yield of extruded product reaches the yield values of setting and keeps the stabilization of yield, passes through PLC controller, traction revolving speed control
Unit and traction frequency convertor adjust the revolving speed of traction device, are drawn automatically with the product to extrusion, make the extrusion
The thickness or Mick of product keep stable again.The present invention can automatically and accurately match raw material according to the requirement of setting
Than reaching the technological parameter requirement of product, improving the quality of product, and can use according to the wear condition of extruder screw
The mode of closed loop feedback adjusts the revolving speed of extruder screw in real time, and extruded product produces caused by solving the abrasion because of extruder screw
The problem of amount decline, guarantee the stable yield of extruded product, increases the time that uses of extruder screw, equally use closed loop feedback
Mode adjust the revolving speed of traction device in real time, guarantee that the thickness of extruded product or Mick are again stable；And the extrusion is made
The minimum value in the margin of tolerance that the thickness of product is positioned to allow for reduce the loss of raw material, and improves the precision of product
And stability.
Detailed description of the invention
Fig. 1 is that a kind of weighing weightlessness integral type of the embodiment of the present invention one squeezes out control system architecture figure；
Fig. 2 is that a kind of weighing weightlessness integral type of the embodiment of the present invention two squeezes out control method flow chart.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Embodiment one, a kind of weightless integral type of weighing squeeze out control system.Below with reference to Fig. 1 to system provided by the invention
It is described in detail.
Referring to Fig. 1, system provided by the invention includes man-machine interaction unit, PLC controller, raw material proportioning unit, the scale pan
Control unit, motor control unit, squeeze out rotary speed controling unit, traction rotary speed controling unit, warning circuit unit, storage vat,
Metering valve, weighing sensor, weightless bucket, weightless sensor, stirring motor, extruder, traction device, squeezes out driver at the scale pan
And traction frequency convertor.
The storage vat has multiple, stores a kind of raw material in each storage vat, multiple storage vats and multiple metering valves are one by one
Corresponding, each metering valve is mounted on the bottom of corresponding storage vat, and the scale pan is located at the underface of multiple metering valves, institute
The bottom that weighing sensor is mounted on the scale pan is stated, the weightlessness bucket position is in the underface of the scale pan, the weightless sensing
Device is mounted on the bottom of the weightless bucket, and the stirring motor is located at the inside of the weightless bucket, and the extruder is located at described
The underface of weightless bucket, the traction device and the extruder are mechanically connected.
The man-machine interaction unit is used for PLC controller input product setup parameter, wherein the product setting ginseng
Number includes at least the setting yield values of extruder in setting time.
The weightlessness sensor, is set to weightless bucket bottom, for perceiving the weight signal in weightless bucket, and by weightless bucket
Interior weight signal is sent to PLC controller and scale pan control unit.
The PLC controller, for obtaining filling with weight/power ratio and traction for various raw materials according to the product setup parameter
The setting speed value set, and the actual production of extruder in setting time is obtained according to the weight signal in the weightless bucket
Value；It is also used to squeeze in the setting time in the actual production value and product setup parameter according to extruder in the setting time
The setting speed value of extruder screw is calculated in the setting yield values of machine out.
Specifically, the various raw materials are sent to the raw material proportioning unit with weight/power ratio by the PLC controller, it will
The setting speed value of the traction device is sent to the traction rotary speed controling unit, also turns the setting of the extruder screw
Fast value is sent to the extrusion rotary speed controling unit.
The product setup parameter specifically includes the setting yield values of extruder in setting time, the ratio of various raw materials ginseng
Number, the width of extruded product, the density of various raw materials and the thickness of extruded product or Mick again etc., and the extrusion are made
The minimum value in the margin of tolerance that the thickness or Mick of product are positioned to allow for again so that traction device obtain high-precision thickness or
The extruded product of person's Mick weight.
Remote computer that the man-machine interaction unit is connected specifically by Industrial Ethernet interface, by remotely controlling
The mobile terminal of interface access processed or the local keys/display interface accessed by local interface.
The weighing sensor is set to scale pan bottom, for perceiving the weight signal of the scale pan, and by the weight of the scale pan
Amount signal is sent to raw material proportioning unit.
The raw material proportioning unit, various raw materials for being sent according to the PLC controller with weight/power ratio, storage not
Multiple storage vat bottoms with raw material correspond the preset flow speed value for the multiple metering valves installed and the weight of the scale pan
Signal is measured, the opening time of multiple metering valves is obtained, successively controls the open and close of multiple metering valves, make difference
Raw material successively fallen into the scale pan from multiple storage vats, complete raw material proportioning.
Specifically, the various raw materials that the raw material proportioning unit is sent according to the PLC controller match weight/power ratio, storage
Multiple storage vat bottoms of different material correspond preset flow speed value and the scale pan bottom of multiple metering valves of installation
The weight signal that weighing sensor is sent, calculates the opening time of the corresponding multiple metering valves of various raw materials；And according to
The opening time successively controls the open and close of multiple metering valves, make different raw materials from multiple storage vats according to
It is secondary to fall into the scale pan, until the weighing sensor send weight signal it is identical as the total weight of the various raw materials, raw material
Proportion terminates, and obtains the amendment flow speed value of multiple metering valves, when using as raw material proportioning next time it is multiple it is described in terms of
Measure the preset flow speed value of valve；Wherein, the preset flow speed value of multiple metering valves when first time raw material proportioning is basis
The raw material weight that metering valve after the metering valve opening unit time flows out is obtained.
Whether the scale pan control unit, the weight signal in weightless bucket for judging the weightless sensor transmission are low
In the lower limit value of setting, if so, opening the scale pan for feedstock transportation to being located in the weightless bucket immediately below the scale pan, until described heavy
Amount signal reach or higher than setting upper limit value, otherwise do not open the scale pan；It is also used to send the scale pan when opening the scale pan and open
Signal is to motor control unit.
Specifically, the scale pan control unit, the weightlessness that the weightless sensor for receiving weightless bucket bottom installation is sent
Weight signal in bucket, and judge whether the weight signal is lower than the lower limit value of setting, if being beaten lower than the lower limit value of setting
Start purchasing seasonal commodities disk by feedstock transportation into the weightless bucket being located at immediately below the scale pan, be then shut off the scale pan so that the raw material proportioning unit after
It is continuous to be matched, repeat the above process, until the weight signal reach or higher than setting upper limit value；If not less than setting
Lower limit value, then do not open the scale pan, continue waiting for until the weight signal lower than setting lower limit value；It is also used to opening scale
Scale pan opening signal is sent when disk to motor control unit.
The motor control unit, for after receiving the scale pan opening signal, controlling the stirring electricity in weightless bucket
Machine is stirred the raw material in weightless bucket.
Specifically, the motor control unit is used in the scale pan opening signal for receiving the scale pan control unit transmission
Afterwards, the stirring motor controlled in weightless bucket is stirred the raw material in weightless bucket, after preset time, controls the stirring motor
It closes, raw material stirring terminates, and obtains mixed raw material.
The extrusion driver, for adjusting the revolving speed of extruder screw under the control for squeezing out rotary speed controling unit.
The extrusion rotary speed controling unit, the setting of the extruder screw for being sent according to the PLC controller
Tachometer value, and the actual speed value of extruder screw is combined, the revolving speed for squeezing out driver adjustment extruder screw is controlled, with
The yield for the extruded product for obtaining extruder reaches the setting yield values of extruder in the setting time.
The traction frequency convertor, for adjusting the revolving speed of traction device under the control of traction rotary speed controling unit.
The traction rotary speed controling unit, for according to the actual speed value of traction device and PLC controller hair
The setting speed value of the traction device sent controls the revolving speed of the traction frequency convertor adjustment traction device, reaches institute
The setting speed value of traction device is stated, so that traction device draws to obtain thickness the extruded product that extruder obtains
Degree or Mick stable extruded product again.
The system also includes extruder speed measuring coders, are set to above extruder, are used for output pulse signal.
The system also includes traction rice counting wheels, are set to above traction device, for exporting traction device feedback signal.
It tests the speed unit the system also includes actual speed, the pulse signal for being exported according to extruder speed measuring coder
The actual speed value of extruder is obtained, and sends it to the PLC controller and the extrusion rotary speed controling unit；Also use
The actual speed value of the traction device is obtained in the traction device feedback signal exported according to traction rice counting wheel, and is sent to
To the traction rotary speed controling unit.
The system also includes warning circuit units, for carrying out warning reminding in an abnormal situation.
In addition, the PLC controller is also used to the work state information of extruder feeding back to the man-machine interaction unit,
Wherein, the work state information of the extruder specifically includes the actual production value and setting yield values of extruder in setting time
And the information such as actual speed value of extruder.
Embodiment two, a kind of weightless integral type of weighing squeeze out control method.Below with reference to Fig. 2 to method provided by the invention
It is described in detail.
Referring to fig. 2, S1, PLC controller according to the product setup parameter of input obtain various raw materials with weight/power ratio and leading
The setting speed value of leading-in device, and the various raw materials are sent to raw material proportioning unit with weight/power ratio, and lead described
The setting speed value of leading-in device is sent to traction rotary speed controling unit, wherein when the product setup parameter includes at least setting
The setting yield values of interior extruder.
Specifically, man-machine interaction unit, to PLC controller input product setup parameter, the product setup parameter at least wraps
The setting yield values of extruder in setting time are included, the PLC controller obtains various raw materials according to the product setup parameter
Setting speed value with weight/power ratio and traction device, and the various raw materials are sent to raw material proportioning list with weight/power ratio
Member, and the setting speed value of the traction device is sent to traction rotary speed controling unit, wherein the man-machine interaction unit
The remote computer being connected specifically by Industrial Ethernet interface, the mobile terminal by remotely controlling access pass through
The keys/display interface of local interface access.
In addition, the operational data information of extruder is also fed back to the man-machine interaction unit by the PLC controller,
In, the work state information of the extruder specifically include extruder in setting time actual production value and setting yield values with
And the information such as actual speed value of extruder.
The product setup parameter specifically includes the setting yield values of extruder in setting time, the ratio of various raw materials ginseng
The thickness or Mick weight of number, the width of extruded product, the density of various raw materials, extruded product, and by the extruded product
The minimum value thickness margin of tolerance that perhaps Mick is positioned to allow for again in is so that traction device obtains high-precision thickness or rice
The extruded product of grammes per square metre.
S2, the raw material proportioning unit are passed according to the weighing of the various raw materials matched weight/power ratio, be set to scale pan bottom
The weight signal for the scale pan that sensor is sent and the multiple storage vat bottoms for storing different material correspond multiple meters of installation
The preset flow speed value for measuring valve, obtains the opening time of multiple metering valves, successively controls the unlatching of multiple metering valves
It with closing, falls into different raw materials successively in the scale pan from multiple storage vats, completes raw material proportioning.
Specifically, the title matching weight/power ratio, be set to scale pan bottom of the raw material proportioning unit according to the various raw materials
The weight signal for retransmitting the scale pan that sensor is sent and the multiple storage vat bottoms for storing different material correspond the more of installation
The preset flow speed value of a metering valve calculates the opening time of the corresponding multiple metering valves of various raw materials；Then it adjusts
The flow velocity of multiple metering valves reaches the setting flow speed value, and beating according to the various corresponding metering valves of raw material
ETAD expected time of arrival and departure successively controls the open and close of multiple metering valves, falls into different raw materials successively from multiple storage vats
In the scale pan, until the weighing sensor send weight signal it is identical as the total weight of the various raw materials, raw material proportioning knot
Beam, and obtain the amendment flow speed value of multiple metering valves, multiple metering valves when using as raw material proportioning next time
Preset flow speed value；Wherein, the preset flow speed value of multiple metering valves when first time raw material proportioning is according to will measure
What the raw material weight that metering valve flows out after the valve opening unit time obtained.
S3, after raw material proportioning terminates, scale pan control unit receives and judges to be set to the weightless of weightless bucket bottom and passes
Whether the weight signal in weightless bucket that sensor is sent is lower than the lower limit value of setting, if so, opening the scale pan for feedstock transportation extremely
In weightless bucket immediately below the scale pan, until the weight signal reach or higher than setting upper limit value, otherwise do not open
The scale pan, and scale pan opening signal is sent to motor control unit when opening the scale pan.
Specifically, scale pan control unit receives the weightless sensor of weightless bucket bottom installation after raw material proportioning terminates
Weight signal in the weightless bucket of transmission, and judge whether the weight signal is lower than the lower limit value of setting, if lower than setting
Lower limit value then opens the scale pan for feedstock transportation into the weightless bucket being located at immediately below the scale pan, is then shut off the scale pan so that the original
Material proportion unit continue to match, repeat the above process, until the weight signal reach or higher than setting upper limit value；
If not opening the scale pan not less than the lower limit value of setting, continue waiting for until lower limit value of the weight signal lower than setting；And
Scale pan opening signal is sent to motor control unit when opening the scale pan.
S4, motor control unit control the stirring motor in weightless bucket to mistake after receiving the scale pan opening signal
Raw material in weight bucket is stirred, and the raw material after stirring is from the spout that weightless bucket bottom falls into extruder, extruder pair
The raw material after the stirring in spout is squeezed out to obtain extruded product.
Specifically, motor control unit after receiving the scale pan opening signal that the scale pan control unit is sent, controls
Stirring motor starting is stirred the various raw materials in weightless bucket, after preset time, described in the motor control unit control
Stirring motor is closed, and raw material stirring terminates, and the raw material after stirring is squeezed out from the spout that weightless bucket bottom falls into extruder
Machine is squeezed out to obtain extruded product to the raw material after the stirring in spout.
The weight signal in weightless bucket that S5, PLC controller are sent according to the weightless sensor obtains in setting time
The actual production value of extruder, and according in the actual production value of extruder in the setting time and the product setup parameter
The setting time in the setting yield values of extruder the setting speed value of extruder screw is calculated, and send it to
Squeeze out rotary speed controling unit.
Specifically, the PLC controller is according to the weight signal in the weightless bucket of the weightless sensor transmission, meter
Calculate the weight of the raw material after the stirring that weightless bucket loses within the set time, i.e., it is actual in extruder setting time
Extruded product yield values.
The actual speed value of the extruder screw is obtained according to the pulse signal of extruder speed measuring coder output.
S6, the rotary speed controling unit that squeezes out combine extruder spiral shell according to the setting speed value of the extruder screw
The actual speed value of bar, control squeeze out the revolving speed of driver adjustment extruder screw, so that the extruded product that extruder obtains
Yield reaches the setting yield values of extruder in the setting time.
S7, traction device draw the extruded product, and the traction rotary speed controling unit is according to traction device
The setting speed value for the traction device that actual speed value and the PLC controller are sent, control traction frequency convertor adjustment
The revolving speed of traction device reaches the setting speed value of the traction device, so that traction device is to the extruded product
Thickness or Mick stable extruded product again are obtained when being drawn.
Specifically, traction device draws the extruded product to control the thickness of the extruded product or Mick
Weight, the traction rotary speed controling unit are led according to the actual speed value of traction device and PLC controller transmission
The setting speed value of leading-in device, the revolving speed of control traction frequency convertor adjustment traction device, reaches setting for the traction device
Tachometer value is determined, so that traction device obtains thickness or Mick stable extruded product again, wherein the reality of the traction device
Tachometer value is obtained according to the traction device feedback signal of traction rice counting wheel output.
The weightless integral type of a kind of weighing provided by the invention squeezes out control system and method is adopted according to product setup parameter
Automatic mixing is carried out to raw material with PLC controller, raw material proportioning unit and weighing sensor, and using PLC controller, extrusion
Rotary speed controling unit and driver is squeezed out to adjust the revolving speed of extruder screw, to carry out automatic-extrusion to raw material, and control
The yield of extruded product reaches the yield values of setting and keeps the stabilization of yield, passes through PLC controller, traction revolving speed control
Unit and traction frequency convertor adjust the revolving speed of traction device, are drawn automatically with the product to extrusion, make the extrusion
The thickness or Mick of product keep stable again.The present invention can automatically and accurately match raw material according to the requirement of setting
Than reaching the technological parameter requirement of product, improving the quality of product, and can use according to the wear condition of extruder screw
The mode of closed loop feedback adjusts the revolving speed of extruder screw in real time, and extruded product produces caused by solving the abrasion because of extruder screw
The problem of amount decline, guarantee the stable yield of extruded product, increases the time that uses of extruder screw, equally use closed loop feedback
Mode adjust the revolving speed of traction device in real time, guarantee that the thickness of extruded product or Mick are again stable；And the extrusion is made
The minimum value in the margin of tolerance that the thickness or Mick of product are positioned to allow for again, to reduce the loss of raw material, and improves
The precision and stability of product.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of weightless integral type of weighing squeezes out control system, which is characterized in that the system comprises man-machine interaction units, PLC
Controller, scale pan control unit, motor control unit, squeezes out rotary speed controling unit, traction revolving speed control list at raw material proportioning unit
Member, the scale pan, weighing sensor, weightless bucket, weightless sensor, stirring motor, extruder, traction device, squeezes out driving at metering valve
Device, traction frequency convertor, extruder speed measuring coder, traction rice counting wheel and actual speed test the speed unit；
The man-machine interaction unit is used for PLC controller input product setup parameter, wherein the product setup parameter is extremely
It less include the setting yield values of extruder in setting time；
The weightlessness sensor, is set to weightless bucket bottom, for perceiving the weight signal in weightless bucket, and will be in weightless bucket
Weight signal is sent to PLC controller and scale pan control unit；
The PLC controller, for according to the product setup parameter obtain various raw materials with weight/power ratio and traction device
Setting speed value, and the actual production value of extruder in setting time is obtained according to the weight signal in the weightless bucket；Also
For extruder in the setting time in the actual production value and product setup parameter according to extruder in the setting time
Setting yield values the setting speed value of extruder screw is calculated；
The weighing sensor is set to scale pan bottom, believes for perceiving the weight signal of the scale pan, and by the weight of the scale pan
Number it is sent to raw material proportioning unit；
The raw material proportioning unit, various raw materials for being sent according to the PLC controller with weight/power ratio, the different originals of storage
Multiple storage vat bottoms of material correspond the preset flow speed value of multiple metering valves of installation and the weight letter of the scale pan
Number, the opening time of multiple metering valves is obtained, the open and close of multiple metering valves is successively controlled, makes different originals
Material is successively fallen into the scale pan from multiple storage vats, completes raw material proportioning；
The scale pan control unit, whether the weight signal in weightless bucket for judging the weightless sensor transmission, which is lower than, sets
Fixed lower limit value, if so, opening the scale pan for feedstock transportation to being located in the weightless bucket immediately below the scale pan, until the weight is believed
Number reach or higher than setting upper limit value, otherwise do not open the scale pan；It is also used to send scale pan opening signal when opening the scale pan
To motor control unit；
The motor control unit, for after receiving the scale pan opening signal, controlling the stirring motor pair in weightless bucket
Raw material in weightless bucket is stirred；
The extrusion driver, for adjusting the revolving speed of extruder screw under the control for squeezing out rotary speed controling unit；
The extrusion rotary speed controling unit, the setting speed of the extruder screw for being sent according to the PLC controller
Value, and the actual speed value of extruder screw is combined, the revolving speed for squeezing out driver adjustment extruder screw is controlled, so as to squeeze
The yield for the extruded product that machine obtains out reaches the setting yield values of extruder in the setting time；
The traction frequency convertor, for adjusting the revolving speed of traction device under the control of traction rotary speed controling unit；
The traction rotary speed controling unit, for what is sent according to the actual speed value of traction device and the PLC controller
The setting speed value of the traction device controls the revolving speed of the traction frequency convertor adjustment traction device, reaches described lead
The setting speed value of leading-in device so that traction device the extruded product that extruder obtains is drawn with obtain thickness or
Person's Mick stable extruded product again；
The extruder speed measuring coder, is set to above extruder, is used for output pulse signal；
The traction rice counting wheel, is set to above traction device, for exporting traction device feedback signal；
The actual speed tests the speed unit, and the pulse signal for being exported according to extruder speed measuring coder obtains the reality of extruder
Border tachometer value, and send it to the PLC controller and the extrusion rotary speed controling unit；It is also used to according to traction metering
The traction device feedback signal of wheel output obtains the actual speed value of the traction device, and sends it to the traction revolving speed
Control unit.
2. the weightless integral type of a kind of weighing as described in claim 1 squeezes out control system, which is characterized in that the human-computer interaction
Unit be the remote computer being connected by Industrial Ethernet interface, the mobile terminal accessed by remote control interface or
The local keys/display interface accessed by local interface.
3. the weightless integral type of a kind of weighing as claimed in claim 2 squeezes out control system, which is characterized in that the PLC control
Device is also used to the operational data information of extruder feeding back to the man-machine interaction unit.
4. the weightless integral type of a kind of weighing as described in claim 1 squeezes out control system, which is characterized in that the product setting
It further include that perhaps the thickness of the extruded product or Mick are positioned to allow for by Mick weight again for the thickness of extruded product in parameter
The margin of tolerance in minimum value so that traction device obtain high-precision thickness or Mick weight extruded product.
5. a kind of weightless integral type of weighing squeezes out control method, which is characterized in that the described method comprises the following steps:
S1, PLC controller according to the product setup parameter inputted from man-machine interaction unit obtain various raw materials with weight/power ratio and
The setting speed value of traction device, and the various raw materials are sent to raw material proportioning unit with weight/power ratio, and will be described
The setting speed value of traction device is sent to traction rotary speed controling unit, wherein the product setup parameter includes at least setting
The setting yield values of extruder in time；
S2, the raw material proportioning unit according to the various raw materials with weight/power ratio, be set to the weighing sensor of scale pan bottom
The weight signal of the scale pan of transmission and the multiple storage vat bottoms for storing different material correspond multiple metering valves of installation
Preset flow speed value, obtain the opening time of multiple metering valves, successively control unlatching and the pass of multiple metering valves
It closes, falls into different raw materials successively in the scale pan from multiple storage vats, complete raw material proportioning；
S3, after raw material proportioning terminates, scale pan control unit receives and judges the weightless sensor for being set to weightless bucket bottom
Whether the weight signal in the weightless bucket of transmission is lower than the lower limit value of setting, if so, opening the scale pan for feedstock transportation to being located at
In weightless bucket immediately below the scale pan, until the weight signal reach or higher than setting upper limit value, otherwise do not open the scale pan,
And scale pan opening signal is sent to motor control unit when opening the scale pan；
S4, motor control unit control the stirring motor in weightless bucket to weightless bucket after receiving the scale pan opening signal
In raw material be stirred, the raw material after stirring is from the spout that weightless bucket bottom falls into extruder, and extruder is to feeding
The raw material after the stirring in mouthful is squeezed out to obtain extruded product；
The weight signal in weightless bucket that S5, PLC controller are sent according to the weightless sensor obtains squeezing out in setting time
The actual production value of machine, and according to the institute in the actual production value of extruder in the setting time and the product setup parameter
The setting speed value of extruder screw is calculated in the setting yield values for stating extruder in setting time, and sends it to extrusion
Rotary speed controling unit；
S6, the rotary speed controling unit that squeezes out combine extruder screw according to the setting speed value of the extruder screw
Actual speed value, control squeezes out the revolving speed of driver adjustment extruder screw, so that the yield for the extruded product that extruder obtains
Reach the setting yield values of extruder in the setting time；
S7, traction device draw the extruded product, and the rotary speed controling unit that draws is according to the reality of traction device
The setting speed value for the traction device that tachometer value and the PLC controller are sent, control traction frequency convertor adjustment traction
The revolving speed of device reaches the setting speed value of the traction device, so that traction device is carried out to the extruded product
Thickness or Mick stable extruded product again are obtained when traction；
The actual speed value of extruder screw described in the step S5 is the pulse letter according to the output of extruder speed measuring coder
It number obtains；
The actual speed value of traction device described in the step S7 is the traction device feedback letter according to traction rice counting wheel output
It number obtains.
6. a kind of weightless integral type of weighing squeezes out control method as claimed in claim 5, which is characterized in that in the step S1
Remote computer that the man-machine interaction unit is connected specifically by Industrial Ethernet interface is connect by remote control interface
The mobile terminal entered or the local keys/display interface accessed by local interface.
7. a kind of weightless integral type of weighing squeezes out control method as claimed in claim 6, which is characterized in that the method is also wrapped
It includes:
The operational data information of extruder is fed back to the man-machine interaction unit by the PLC controller.
8. the weightless integral type of a kind of weighing as claimed in claim 6 squeezes out control method, which is characterized in that the product setting
Further include in parameter extruded product thickness perhaps Mick weight and reset the thickness of the extruded product or Mick be set to it is fair
Perhaps the minimum value in the margin of tolerance, so that traction device obtains the extruded product of high-precision thickness or Mick weight.
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| DE102016112121A1 (en) * | 2016-07-01 | 2018-01-04 | Brückner Maschinenbau GmbH & Co. KG | Control device for producing and / or treating a plastic film and associated method |
| CN106514984A (en) * | 2016-12-08 | 2017-03-22 | 东莞信易电热机械有限公司 | Weight increment and weight loss integral mixing device |
| CN109016442A (en) * | 2018-08-02 | 2018-12-18 | 东莞信易电热机械有限公司 | A kind of weight-loss type screw rod feed system and its method |
| CN110466131A (en) * | 2019-08-28 | 2019-11-19 | 宁波塑之华塑化有限公司 | A kind of production equipment and production technology of modified plastics |
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| CN204223854U (en) * | 2014-11-19 | 2015-03-25 | 铜陵市菲力克测控技术有限公司 | A kind of weight-loss type pay-off |
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| US20050214419A1 (en) * | 2004-03-29 | 2005-09-29 | Aberle Rick A | Method and apparatus for providing instantaneous, real-time data for extrusion process control |
| CN101898412B (en) * | 2009-05-27 | 2014-12-03 | 上海松耐机械制造有限公司 | Extrusion control device of weight-loss type measuring control system |
| JP2011131381A (en) * | 2009-12-22 | 2011-07-07 | Japan Steel Works Ltd:The | Method for changing processing amount during charge with loss in weight system feeder raw material |
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| CN102470562A (en) * | 2009-07-13 | 2012-05-23 | 株式会社松井制作所 | Material blending/supplying device and method |
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