CN203391288U - Conical twin-screw extruder - Google Patents

Conical twin-screw extruder Download PDF

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Publication number
CN203391288U
CN203391288U CN201320289874.4U CN201320289874U CN203391288U CN 203391288 U CN203391288 U CN 203391288U CN 201320289874 U CN201320289874 U CN 201320289874U CN 203391288 U CN203391288 U CN 203391288U
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CN
China
Prior art keywords
motor
current
electric machine
main motor
traction electric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201320289874.4U
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Chinese (zh)
Inventor
黄正雄
黄彦淇
甄焕财
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Liansu Machinery Manufacturing Co Ltd
Original Assignee
Guangdong Liansu Machinery Manufacturing Co Ltd
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Filing date
Publication date
Application filed by Guangdong Liansu Machinery Manufacturing Co Ltd filed Critical Guangdong Liansu Machinery Manufacturing Co Ltd
Priority to CN201320289874.4U priority Critical patent/CN203391288U/en
Application granted granted Critical
Publication of CN203391288U publication Critical patent/CN203391288U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92085—Velocity
    • B29C2948/92095—Angular velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92085—Velocity
    • B29C2948/92104—Flow or feed rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/9239—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
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/924—Barrel or housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The utility model discloses a conical twin-screw extruder. The conical twin-screw extruder comprises a master motor, a charging motor and a traction motor, as well as a controller, wherein the master motor, the charging motor and the traction motor are controlled to be started and stopped by a conventional electrical circuit; the controller is used for converting current break of the master motor into a control signal to control the master motor, the charging motor and the traction motor; when the current of the master motor suddenly rises and deviates a set deviation value, the speed of the master motor is reduced, and the speeds of the charging motor and traction motor are reduced according to a proportion; and otherwise, when the current of the extruder master motor is suddenly reduced and deviates the set deviation value, the speed of the master motor is increased, and the speeds of the charging motor and traction motor are increased according to the proportion.

Description

A kind of tapered double screw extruder
Technical field
The utility model relates to technical field of plastic, is specifically related to a kind of tapered double screw extruder.
Background technology
Tapered double screw extruder is plastics manufacturing common equipment, if the patent No. is the disclosed extruder of 201110094947.X patent.
At present, in whole extruder industry, for the control of tapered double screw extruder, mainly contain two kinds.One, by simple electric circuit, control start and stop and the speed of service of extruder main frame, reinforced motor and traction electric machine; By temp controlled meter, main frame machine barrel and mould are carried out to temperature control and regulation.This control mode cost is lower, but when speed of production will promote or decline, its Synchronization Control poor effect, quality of item is easily affected.Two, by programmable logic controller, realize start and stop and the speed of service to extruder main frame, reinforced motor and traction electric machine; Utilize the PID computing of self to carry out machine barrel, mold temperature control simultaneously.This control mode cost is relatively high, but can reach good Synchronization Control effect.Above two kinds of control modes are all that whether off-rating is protected motor and screw rod by detecting current of electric moment of torsion.But because tapered double screw extruder is mainly used in PVC powder extruding production line.And PVC powder exists a variety of causes such as blanking inequality, material proportion difference easily to cause screw torque sudden change, easily cause pipe material product became uneven even; Even motor does not also reach nominal torque, just causes screw rod fracture.These two kinds of control modes all can not very effectively overcome the above problems.
Summary of the invention
The utility model is intended to one of address the above problem at least to a certain extent.
The defect that is to overcome prior art of improving eyesight of the present utility model, provides a kind of tapered double screw extruder, adopts this tapered double screw extruder, can reduce costs, and can guarantee again reasonable product effect.
For achieving the above object, the utility model adopts following technical scheme, a kind of tapered double screw extruder, the main motor that comprises tapered double screw extruder, reinforced motor and traction electric machine, described main motor, reinforced motor and traction electric machine adopt conventional electric circuit to control start and stop, also comprise controller, described controller is converted to control signal to main motor by Main motor current sudden change, reinforced motor and traction electric machine are controlled, when Main motor current increases suddenly, while having departed from the deviate of setting, main motor speed reduces, reinforced motor and traction electric machine speed reduce in proportion, otherwise, when extruding Main motor current, reducing suddenly, while having departed from the deviate of setting, main motor speed increases, and reinforced motor and traction electric machine speed scale up.
Concrete, described controller comprises:
Memory module, for storing the normal current signal value of setting, the current deviation value of setting;
Acquisition module, for gathering the current signal of tapered twin-screw extrusion owner motor;
Comparison operation module, current signal and setting normal current signal for relatively collecting, obtain current deviation value;
Control module, for being converted to current deviation value control signal and tapered twin-screw extrusion owner motor, reinforced motor and traction electric machine being controlled.
The utility model further improves and is, also stores moment of torsion sudden change shutdown value in described memory module, and when the current signal of main motor surpasses moment of torsion sudden change shutdown value, described main motor, reinforced motor and traction electric machine stop operating.When current of electric surpasses setting moment of torsion sudden change shutdown value, motor stops immediately, to protect screw rod.
This method passes through to detect the current break of the main motor of tapered double screw extruder, thereby it is carried out to computing, changes the speed of main motor, reinforced motor and traction electric machine after computing, can make main motor remain under identical moment of torsion and move simultaneously.Thereby the various interference problems that cause main frame curent change such as solution blanking is irregular.
The beneficial effects of the utility model
One, can automatic control host machine screw rod electric current, make screw rod keep more constant electric current output, and can press the speed of default electric current adjusted in concert main frame, feeding and traction.Make production line improve output when not changing quality of item.
Two, screw torque sudden change in the time of can controlling normal production.Moment of torsion sudden change surpasses setting range hard stop protection screw rod.
Accompanying drawing explanation
Fig. 1 is control circuit figure of the present utility model.
Fig. 2 is closed-loop control schematic diagram.
Accompanying drawing, only for exemplary illustration, can not be interpreted as limitation of the present invention; For better explanation embodiment, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in accompanying drawing some known features and explanation thereof may to omit be understandable.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.
Tapered double screw extruder described in the utility model, comprise the main motor of tapered double screw extruder, reinforced motor and traction electric machine, described main motor, reinforced motor and traction electric machine adopt conventional electric circuit to control start and stop, also comprise controller, described controller is converted to control signal by Main motor current sudden change main motor, reinforced motor and traction electric machine is controlled.
Concrete, described controller comprises:
Memory module, for storing the normal current signal value of setting, the current deviation value of setting;
Acquisition module, for gathering the current signal of tapered twin-screw extrusion owner motor;
Comparison operation module, current signal and setting normal current signal for relatively collecting, obtain current deviation value;
Control module, for being converted to current deviation value control signal and tapered twin-screw extrusion owner motor, reinforced motor and traction electric machine being controlled.
The utility model further improves and is, also stores moment of torsion sudden change shutdown value in described memory module, and when the current signal of main motor surpasses moment of torsion sudden change shutdown value, described main motor, reinforced motor and traction electric machine stop operating.
The utility model selects temp controlled meter cheaply to carry out thermal treatment zone temperature control and use conventional electric circuit to control the start and stop of extruder main frame, reinforced motor and traction electric machine, but motor speed is controlled by a small-sized programmable logic controller (PLC) all-in-one.Control effect and the cost that can not only reach are like this lower, are easier in industry promote.
Shown in Fig. 1, main electric motor starting, synchronous acceleration, synchronous deceleration, the acceleration of main motor, main decelerating through motor, feeding motor accelerate, feeding motor slows down, traction electric machine accelerates to be connected with pin X0-X7 respectively, and traction electric machine deceleration is connected with pin X10.Feeding motor and COM 1(COM1) be connected; Main motor current detection signal is connected with the input port of controller after changing by transmitter, the speed detection signal of main motor is connected with another input port, and initiatively motor speed is given is connected with two output ports of controller respectively with traction electric machine speed preset.
Fig. 2 is control flow chart of the present utility model.
Concrete control method is as follows:
S1, setting conventional current signal and current deviation value; And deposit conventional current signal and current deviation value in memory module.
S2, by acquisition module, gather the current signal of tapered twin-screw extrusion owner motor;
S3, by by collecting the normal current signal comparison of current signal and setting, obtain deviation electric current;
The rotating speed of S4, the main motor of exporting and control tapered double screw extruder using deviation electric current as signal, reinforced motor and traction electric machine; When extruding Main motor current, increase suddenly, while having departed from the current deviation value of setting, main motor speed reduces, and reinforced motor and traction electric machine speed reduce in proportion; Otherwise, when extruding Main motor current, reducing suddenly, while having departed from the deviate of setting, main motor speed increases, and reinforced motor and traction electric machine speed scale up.
Control appliance described in the utility model adopts programmable logic controller (PLC) to gather the current signal of extruder main motor, and the conventional current value of current signal and setting is compared, then according to current deviation signal, carry out numerical operation, by the torque feedback signal from speed regulator and the comparison operation of target current set-point, through its result of computing, as frequency instruction, output to respectively extruder main frame, reinforced motor and traction electric machine, and then change its speed, the main Motor torque of controlled quentity controlled variable is also along with linear variation occurs the speed of main motor, finally reach target torque value.And reinforced motor and traction electric machine are followed the speed of main motor and change, thereby guaranteed the quality of goods.Ought extrude Main motor current (moment of torsion) and increase suddenly, while having departed from the deviate of setting, main motor speed will reduce, and main motor output torque is reduced, and reinforced motor and traction electric machine speed also can reduce in proportion; Otherwise, when extruding Main motor current (moment of torsion), reducing suddenly, while having departed from the deviate of setting, main motor speed will increase, and main motor output torque is increased, and reinforced motor and traction electric machine speed also can scale up.When Motor torque surpasses setting moment of torsion, motor stops immediately, to protect screw rod.Can change by setting main frame increment size the acceleration and deceleration gradient of motor speed simultaneously.Increment size is larger, and speed responsive is faster, if excessive, easily causes overshoot, and motor fluctuation is large; If but too small, main-machine screw protective reaction may be not in time.

Claims (2)

1. a tapered double screw extruder, comprise the main motor of tapered double screw extruder, reinforced motor and traction electric machine, described main motor, reinforced motor and traction electric machine adopt conventional electric circuit to control start and stop, it is characterized in that, also comprise controller, described controller is converted to control signal by Main motor current sudden change main motor, reinforced motor and traction electric machine is controlled, and described controller comprises:
Memory module, for storing the normal current signal value of setting, the current deviation value of setting;
Acquisition module, for gathering the current signal of tapered twin-screw extrusion owner motor;
Comparison operation module, current signal and setting normal current signal for relatively collecting, obtain current deviation value;
Control module, for being converted to current deviation value control signal and tapered twin-screw extrusion owner motor, reinforced motor and traction electric machine being controlled.
2. tapered double screw extruder according to claim 1; it is characterized in that; in described memory module, also store moment of torsion sudden change shutdown value, when the current signal of main motor surpasses moment of torsion sudden change shutdown value, described main motor, reinforced motor and traction electric machine stop operating.
CN201320289874.4U 2013-05-24 2013-05-24 Conical twin-screw extruder Expired - Fee Related CN203391288U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320289874.4U CN203391288U (en) 2013-05-24 2013-05-24 Conical twin-screw extruder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320289874.4U CN203391288U (en) 2013-05-24 2013-05-24 Conical twin-screw extruder

Publications (1)

Publication Number Publication Date
CN203391288U true CN203391288U (en) 2014-01-15

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103273638A (en) * 2013-05-24 2013-09-04 广东联塑机器制造有限公司 Method and device for controlling conical twin-screw extruder
CN104527023A (en) * 2014-12-30 2015-04-22 广东联塑机器制造有限公司 Extruder for preventing screw from being twisted off
CN113968012A (en) * 2021-11-02 2022-01-25 镇江泰舸电池隔膜科技有限公司 Real-time state judgment method for PE partition extrusion processing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103273638A (en) * 2013-05-24 2013-09-04 广东联塑机器制造有限公司 Method and device for controlling conical twin-screw extruder
CN104527023A (en) * 2014-12-30 2015-04-22 广东联塑机器制造有限公司 Extruder for preventing screw from being twisted off
CN113968012A (en) * 2021-11-02 2022-01-25 镇江泰舸电池隔膜科技有限公司 Real-time state judgment method for PE partition extrusion processing
CN113968012B (en) * 2021-11-02 2024-05-07 镇江泰舸电池隔膜科技有限公司 Real-time state judging method for PE separator extrusion processing

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140115

Termination date: 20210524