CN108000822A - A kind of injecting plasticizing device and its control system and plasticizing method - Google Patents
A kind of injecting plasticizing device and its control system and plasticizing method Download PDFInfo
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- CN108000822A CN108000822A CN201711276346.4A CN201711276346A CN108000822A CN 108000822 A CN108000822 A CN 108000822A CN 201711276346 A CN201711276346 A CN 201711276346A CN 108000822 A CN108000822 A CN 108000822A
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000002347 injection Methods 0.000 claims abstract description 101
- 239000007924 injection Substances 0.000 claims abstract description 101
- 230000008569 process Effects 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000001360 synchronised effect Effects 0.000 claims description 25
- 229920003023 plastic Polymers 0.000 claims description 19
- 239000004033 plastic Substances 0.000 claims description 19
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 17
- 239000000155 melt Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000001960 triggered effect Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/84—Safety devices
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/84—Safety devices
- B29C2045/848—Safety devices detecting or preventing overload of an injection plunger
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/76006—Pressure
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7611—Velocity
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of injecting plasticizing device and its control system and plasticizing method；Wherein, injecting plasticizing device, including injection tube, plasticized screw, driving mechanism, ball-screw, ball ejector sleeve and injecting motor；Injection tube is equipped with the cavity for accommodating plasticized screw front end, and one end of driving mechanism couples with the rear-end transmission of plasticized screw, and the other end couples with ball-screw, and ball ejector sleeve couples with ball-screw and injecting motor respectively, and transmission is rolled to be formed.The injecting plasticizing device of the present invention, it is simple in structure, reduce production cost and stability is good, improve control accuracy；It is safe, avoid because of the triggered insecurity that has a power failure；It can judge that injection blocks and plasticized screw collides in injection process, in plasticizing process, plasticizing back-pressure can be detected, whole control system is become economical and practical, improve the market competitiveness；Compact-sized, easy for installation, action is not in deadlock phenomenon；It is highly practical, it is adapted to widely popularize.
Description
Technical field
The present invention relates to injecting plasticizing field, more specifically refers to a kind of injecting plasticizing device and its control system and modeling
Change method.
Background technology
The operation principle of injecting plasticizing device be under the action of certain pressure, speed, the melt plastics being plasticized are fast
Speed is expelled in die cavity, after the completion of injection, into plasticizing melting process, reaches plasticizing measuring requirement, into injecting next time
Journey.First, during the melt plastics that fast injection has been plasticized, injection pressure, speed, position are variable, and can
In controllable scope, using injection servo motor direct-drive injection, the position fed back by injecting servo motor coder
Pulse, obtains current location and speed, obtains current injection pressure by injecting servo motor torque, realizes precise injection.The
Two, in storing plasticizing process, plasticizing servo motor rotates, and starts to be plasticized storing process, the melt modeling that screw front end has been plasticized
Material constantly accumulation, after reaching certain density, pressure is produced to screw front end, and pressure is acted on ball-screw through machine driving,
Formed and reverse statical moment is produced to injection servo motor axis, promoted to inject servo motor rotating forward, moved after driving screw rod, to maintain spiral shell
The certain pressure of nose.3rd, in storing plasticizing process, plasticizing servo motor drives plasticized screw to start to rotate, and moulds
Material raw material, which enters in injection tube, to be squeezed, the effect such as shears, is vented, be homogenized, and this effect is known as plasticizing, plasticizing pressure, speed
Degree, position be variable, and can in controllable scope, by be plasticized servo motor coder feed back P-pulse,
Current operation speed is obtained, current plasticizing pressure is obtained by being plasticized servo motor torque, realizes accurate plasticizing effect.4th,
Servo motor direct-drive injection is injected, is connected using rigid mechanical, pressure actuation loss is minimum, can fast and accurately be watched with injection
Take motor and form correspondence.5th, in injection process, the torque of injection servo motor, rotating speed, position feed back signal and position,
Speed, pressure realize closed-loop control；In storing plasticizing process, the torque of plasticizing servo motor, rotating speed, position feed back signal and position
Put, speed, pressure realize closed-loop control, meanwhile, injection servo motor torque, rotating speed, position feed back signal and position, speed,
Pressure realizes closed-loop control, realizes the automation and intelligentification control method of closed-loop.
Traditional injecting plasticizing device, mainly there is three kinds：One, hydraulic injection plasticizing apparatus, greasy dirt is serious, and energy consumption is big, note
Firing rate degree is slow, and safety and stability is than relatively low；Two, servo-electric injecting plasticizing device, using spline structure, mechanism is complicated,
Spline moves back and forth in rotation in the course of work, serious wear, and material and requirement on machining accuracy are very high, and production cost pressure adds
Greatly, maintenance cost is high；The driving of servo-electric injection influences motor torque and injection pressure using toothed belt transmission control
Linear relationship, injection pressure precision are restricted；Three, servo-electric injecting plasticizing device, using high-accuracy pressure sensing
Device (1.5 ten thousand to 2 ten thousand yuans), also uses spline structure, and mechanism is complicated, and spline moves back and forth in rotation in the course of work
Dynamic, serious wear, material and requirement on machining accuracy are very high, production cost pressure bigger, and maintenance cost is high；Servo-electric injection
Driving is controlled using toothed belt transmission, influences the linear relationship of motor torque and injection pressure, and injection pressure precision is subject to
Limitation.
The content of the invention
The defects of it is an object of the invention to overcome the prior art, there is provided a kind of injecting plasticizing device and its control system and
Plasticizing method.
To achieve the above object, the present invention uses following technical scheme：
Injecting plasticizing device, including injection tube, plasticized screw, driving mechanism, ball-screw, ball ejector sleeve and injection electricity
Machine；The injection tube is equipped with the cavity for accommodating the plasticized screw front end, one end of the driving mechanism and the plasticized screw
Rear-end transmission connection, the other end couples with the ball-screw, the ball ejector sleeve respectively with the ball-screw and described
Injecting motor couples, and transmission is rolled to be formed.
Its further technical solution is：The charging for entering the cavity for plastics is additionally provided with the upside of the injection tube
Mouthful.
Its further technical solution is：It is synchronously synchronous from wheel, plasticizing that the driving mechanism includes screw rod shaft coupling, plasticizing
Band, the synchronous main wheel of plasticizing and plasticizing motor；The screw rod shaft coupling is synchronous with the plasticizing same from wheel driving coupling, the plasticizing
Step is coupled from wheel and the synchronous main wheel of plasticizing by the plasticizing toothed belt transmission, the plasticizing motor and the synchronous main wheel of the plasticizing
Driving coupling.
Its further technical solution is：One end of the screw rod shaft coupling couples with the rear-end transmission of the plasticized screw,
The other end couples with the ball-screw.
The control system of injecting plasticizing device, including microcontroller, operator control panel, power supply, injection servo-driver, plasticizing watch
Take driver, current detection module, injecting motor and plasticizing motor；The operator control panel, power supply, injection servo-driver and plasticizing
Servo-driver is connected with the microcontroller；The current detection module and injecting motor with the injection servo-drive
Device connects, and the plasticizing motor is connected with the plasticizing servo-driver.
A kind of plasticizing method, it is as follows using injecting plasticizing device described above, specific plasticizing process：
Step 1, promotes plasticized screw to advance, and realizes injection；
Step 2, judges whether plasticized screw reaches precalculated position；If it is, three are entered step, if it is not, then returning
Return step 1；
Step 3, is plasticized plastics；
Step 4, judges whether current detecting reaches；If it is, five are entered step, if it is not, then return to step
Three；
Step 5, plasticized screw retreats, to keep the pressure of plasticized screw front end；
Step 6, judges whether plasticizing metering meets；If it is, seven are entered step, if it is not, then return to step
Three；
Step 7, completes plasticizing.
Its further technical solution is：In the step 1, including herein below；Injecting motor inverts, and promotes plasticizing spiral shell
Bar advances to the left, realizes injection.
Its further technical solution is：In the step 3, including herein below；Plasticizing motor rotates in an anti-clockwise direction,
Plastic raw materials, which enter in injection tube, to be squeezed, shear, is vented and is homogenized.
Its further technical solution is：In the step 4, including herein below；Current detecting uses current detection module
Detection, the current detection module are connected with injection servo-driver, and the torque electrostatic current signal that collection injecting motor is implemented, passes
Injection servo-driver is defeated by, implements closed-loop current control, in injection process, the forward thrust of plasticized screw is adjusted, to keep away
The head for exempting from plasticized screw during plasticized screw advances collides with injection tube.
Its further technical solution is：In the step 5, including herein below；The melt that plasticized screw front end has been plasticized
Plastics are constantly accumulated, and after reaching certain density, produce pressure to plasticized screw front end, pressure acts on ball wire through machine driving
On thick stick, formed and reverse statical moment is produced to injecting motor axis, promote injecting motor to rotate forward, drive plasticized screw to retreat to the right.
Compared with the prior art, the invention has the advantages that：The injecting plasticizing device, it is simple in structure, it is cost-effective, subtract
Low production cost and stability is good, improves control accuracy；It is safe, avoid because have a power failure triggered it is dangerous because
Element；It can judge that injection blocks and plasticized screw collides in injection process, in plasticizing process, plasticizing back-pressure can be detected,
Whole control system is become economical and practical, saved production cost, improve the market competitiveness；It is compact-sized, it is easy for installation,
Action is not in deadlock phenomenon；Do not rotated using ball-screw, ball ejector sleeve (nut) rotating manner, motor directly drives rolling
Pearl ejector sleeve (nut) rotates, and implement injection and plasticizing process, improve performance；It is highly practical, it is adapted to widely popularize.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the structure diagram of injecting plasticizing device；
Fig. 2 is the circuit block diagram of the control system of injecting plasticizing device；
Fig. 3 is the flow chart of plasticizing method；
Fig. 4 is the control method schematic diagram of injection servo motor；
Fig. 5 is the control method schematic diagram of plasticizing servo motor；
Fig. 6 is the circuit diagram of current detection module.
10 injection tube, 11 cavity
12 feed inlet, 20 plasticized screw
30 driving mechanism, 31 screw rod shaft coupling
32 plasticizings are synchronous from the plasticizing synchronous belt of wheel 33
The synchronous main wheel 35 of 34 plasticizings is plasticized motor
40 ball-screw, 50 ball ejector sleeve
60 injecting motor, 70 microcontroller
80 operator control panel, 90 power supply
100 injection servo-drivers 110 are plasticized servo-driver
120 current detection module, 130 injecting motor
140 plasticizing motors
Embodiment
In order to more fully understand the present invention technology contents, with reference to specific embodiment to technical scheme into
One step introduction and explanation, but not limited to this.
Specific embodiment as shown in Fig. 1 to Fig. 6, the invention discloses a kind of injecting plasticizing device and its control system and
Plasticizing method；Wherein, as shown in Figure 1, injecting plasticizing device, including injection tube 10, plasticized screw 20, driving mechanism 30, ball
Leading screw 40, ball ejector sleeve 50 and injecting motor 60；Injection tube 10 is equipped with the cavity 11 for accommodating 20 front end of plasticized screw, driving mechanism
30 one end couples with the rear-end transmission of plasticized screw 20, and the other end couples with ball-screw 40, ball ejector sleeve 50 respectively with rolling
Ballscrew 40 and injecting motor 60 couple, and transmission is rolled to be formed.
Wherein, the upside of injection tube 10 is additionally provided with the feed inlet 12 for entering cavity 11 for plastics, to be plasticized.
Specifically, as shown in Figure 1, driving mechanism 30 includes screw rod shaft coupling 31, plasticizing synchronously from wheel 32, plasticizing synchronous belt
33rd, synchronous main wheel 34 and plasticizing motor 35 are plasticized；Screw rod shaft coupling 31 is synchronous with plasticizing from taking turns 32 driving couplings, plasticizing it is synchronous from
Wheel 32 and the synchronous main wheel 34 of plasticizing are by being plasticized 33 driving coupling of synchronous belt, plasticizing motor 35 transmission of main wheel 34 connection synchronous with plasticizing
Connect.
Wherein, one end of screw rod shaft coupling 31 couples with the rear-end transmission of plasticized screw 20, the other end and ball-screw 40
Connection.
Wherein, in the present embodiment, motor is servo motor.
The operation principle of the injecting plasticizing device is：In injection process, injection servo motor drives ball ejector sleeve 50 anti-
Turn, promote plasticized screw 20 to advance, implement injection action；In plasticizing process, plasticizing servo motor drives the synchronous main wheel of plasticizing
34 rotate counterclockwise, and are driven through being plasticized synchronous belt 33, drive plasticizing is synchronous to be rotated from wheel 32, and it is synchronous out of wheel 32 to be fixed on plasticizing
The screw rod shaft coupling 31 in portion rotates therewith, and screw rod shaft coupling 31 drives plasticized screw 20 to rotate counterclockwise, and plastics are from feed inlet 12
Into molten plastic is gradually accumulated in 20 front end of plasticized screw, is formed pressure, back-pressure is as plasticized, when this pressure reaches
To and after overcoming mechanical resistance, promote plasticized screw 20, be delivered to ball-screw 40, promote to inject servo motor and rotate forward trend,
By being fed back to the electrostatic current for injecting servo motor, control injection servo motor is implemented to rotate forward, and refers to until plasticized screw 20 reaches
Order plasticizing end position, completes charging plasticizing process.
As shown in Fig. 2, the invention also discloses the control system of injecting plasticizing device, including microcontroller 70, operator control panel
80th, power supply 90, injection servo-driver 100, plasticizing servo-driver 110, current detection module 120, injecting motor 130 and modeling
Change motor 140；Operator control panel 80, power supply 90, injection servo-driver 100 and plasticizing servo-driver 110 with microcontroller 70
Connection；Current detection module 120 and injecting motor 130 are connected with injection servo-driver 100, plasticizing motor 140 and plasticizing
Servo-driver 110 connects.
Wherein, inject and pass through digital-to-analogue conversion between servo-driver 100, plasticizing servo-driver 110 and microcontroller 70
Module (not shown) and analog-to-digital conversion module (not shown) are communicated.
Wherein, in the present embodiment, power supply 90 is DC power supply, and 24 volts of required direct currents are provided to each electric appliance component；
Operator control panel 80 passes through Modbus (communication protocols with microcontroller 70：National standard GB/T19582-2008) communication, realize human-computer interaction,
The processing of microcontroller 70 is received from the position of operator control panel 80, speed, torque instruction and operation operational order, with servo-driver
Connected by Ethernet, carry out data interaction with servo-driver, control servo motor, which is pressed, makees technique process flow operation, connects
The speed from servo-driver, torque, position feed back signal are received, speed, torque digital signal after analog-to-digital conversion, processing speed
Degree, torque, position closed loop are digital regulated, speed are formed after being converted by digital-to-analogue, torque analog signal is transmitted to servo-driver, commander
Servo motor opsition dependent cooperates with execution technological process；Current detection module 120, also referred to as current sense amplifier, with injection
Servo-driver 100 connects, and the torque electrostatic current signal that collection injection servo motor is implemented, is transferred to injection servo-driver
100, implement closed-loop current control, in injection process, adjust the forward thrust of plasticized screw, avoid plasticized screw advance process
Middle screw head collides with injection tube, improves the stability and security of formed product, and plasticizing is adjusted in plasticizing process
The astern speed of screw rod, retreats plasticized screw automatic uniform speed in plasticizing process, ensure that molten plastic pressure in plasticizing process
It is real, improve plasticizing quality；Injection servo-driver is additionally provided with injection servo motor coder (not shown), and collection injection is watched
Motor encoder position pulse signal is taken, the speed of implementation, dtc signal are transmitted to microcontroller 70 through analog-to-digital conversion, is received
From the position of 70 digital-to-analogue conversion of microcontroller, speed, torque actuated signal, according to the speed of microcontroller 70, torque, position
Instruction, amplification driving injection servo motor, which advances, implements operating, completes injection compulsory exercise；Plasticizing servo-driver is additionally provided with modeling
Change servo motor coder (not shown), collection plasticizing servo motor coder position pulse signal, will inject servo horse
The torque electrostatic current signal reached is transmitted to microcontroller 70 through analog-to-digital conversion, receives from the position of 70 digital-to-analogue conversion of microcontroller
Put, speed, torque actuated signal, according to the speed of microcontroller 70, torque, position command, amplification driving injection servo motor
Implement operating with plasticizing servo motor, complete plasticizing and plasticized screw retreats and reaches plasticizing metering process.
As shown in Figures 3 to 6, the invention also discloses a kind of plasticizing method, using injecting plasticizing device described above,
Specific plasticizing process is as follows：
Step 1, promotes plasticized screw to advance, and realizes injection；
Step 2, judges whether plasticized screw reaches precalculated position；If it is, three are entered step, if it is not, then returning
Return step 1；
Step 3, is plasticized plastics；
Step 4, judges whether current detecting reaches；If it is, five are entered step, if it is not, then return to step
Three；
Step 5, plasticized screw retreats, to keep the pressure of plasticized screw front end；
Step 6, judges whether plasticizing metering meets；If it is, seven are entered step, if it is not, then return to step
Three；
Step 7, completes plasticizing.
Wherein, in step 1, including herein below；Injecting motor inverts, and promotes plasticized screw to advance to the left, realizes note
Penetrate.
Wherein, in step 3, including herein below；Plasticizing motor rotates in an anti-clockwise direction, and plastic raw materials enter injection tube
Inside it is squeezed, shear, be vented and is homogenized.
Wherein, in step 4, including herein below；Current detecting is detected using current detection module, the current detecting
Module is connected with injection servo-driver, and the torque electrostatic current signal that collection injecting motor is implemented, is transferred to injection servo-drive
Device, implements closed-loop current control, in injection process, adjusts the forward thrust of plasticized screw, advanced to avoid plasticized screw
The head of plasticized screw collides with injection tube in journey.
Wherein, in step 5, including herein below；The melt plastics that plasticized screw front end has been plasticized constantly are accumulated, and are reached
After certain density, pressure is produced to plasticized screw front end, pressure is acted on ball-screw through machine driving, is formed to injection electricity
Arbor produces reverse statical moment, promotes injecting motor to rotate forward, and drives plasticized screw to retreat to the right.
Wherein, the principle of plasticizing method is：Servo motor reversion is injected, lead-screw advances to the left, realizes injection, reaches
The location of instruction, completes injection, and plasticizing servo motor rotates in an anti-clockwise direction, and plastic raw materials, which enter in injection tube, to be squeezed, cuts
The effect such as cut, be vented, being homogenized, the melt plastics that plasticized screw front end has been plasticized constantly are accumulated, after reaching certain density, to being plasticized
Screw front end produces pressure, and pressure is acted on ball-screw through machine driving, is formed and injection servo motor axis is produced reversely
Statical moment (also referred to as electrostatic current), promotes to inject servo motor rotating forward, drives plasticized screw to retreat to the right, to maintain screw head front end
Certain pressure, complete plasticizing metering；The torque of injection servo motor is directly fed back to micro-control by the electric current of injection servo motor
Device processed, forms closed-loop with position and speed, is adjusted through PID (proportional integral differential), realize precise injection speed, pressure intelligent
Control and plasticizing rate, pressure intelligent control.
Specifically, in figures 4 and 5, it is related to automatic intelligent control, including position ring, speed ring, electric current loop.Position
Ring, is by servo motor coder position pulse signal feedback data and the plasticized screw location of instruction in injection or plasticizing process
Compare, obtain position deviation, to plasticized screw enforcing location closed loop intelligent control；Speed ring, is by the rotation speed of servo motor
Degree, fed back by servo-driver, through analog-to-digital conversion into digital signal compared with the command speed of current location, obtain speed
Deviation, implements speed closed loop intelligent control to servo motor rotating speed；Electric current loop, is to flow through the real-time electrostatic for injecting servo motor
The current digital signal of current sense amplifier feedback, compared with the actual instruction electric current of plasticized screw current location, obtains
To current deviation.To being plasticized servo motor intelligentized control method, it is only necessary to enforcing location ring and speed ring control, to injecting servo motor
Intelligentized control method, in injection and plasticizing process, enforcing location ring, speed ring and current loop control.
Specifically, as shown in fig. 6, disclosing the circuit diagram of current detection module；In the present invention, current detecting is put
Device plays the role of vital in injecting plasticizing device greatly, direct-drive type injecting plasticizing device is implemented automation and intelligentification control
System, reduces all-electric injection production cost, adjusts injection pressure in injection process amendment, makes injection more accurate careful, improves
Injection molding precision；The astern speed of plasticized screw is adjusted in plasticizing process, makes plasticized screw automatic even in plasticizing process
Speed retreats, and ensures that molten plastic is compacted in plasticizing process, improves plasticizing quality.
It is cost-effective in conclusion the injecting plasticizing device in the present invention, simple in structure, reduce production cost and steady
It is qualitative good, improve control accuracy；It is safe, avoid because of the triggered insecurity that has a power failure；The energy in injection process
Judge that injection blocks and plasticized screw collides, in plasticizing process, plasticizing back-pressure can be detected, become whole control system
It is economical and practical, production cost has been saved, has improved the market competitiveness；Compact-sized, easy for installation, action is not in locked existing
As；Not rotated using ball-screw, ball ejector sleeve (nut) rotating manner, motor directly drives ball ejector sleeve (nut) to rotate,
Implement injection and plasticizing process, improve performance；It is highly practical, it is adapted to widely popularize.
The above-mentioned technology contents that the present invention is only further illustrated with embodiment, in order to which reader is easier to understand, but not
Represent embodiments of the present invention and be only limitted to this, any technology done according to the present invention extends or recreation, by the present invention's
Protection.Protection scope of the present invention is subject to claims.
Claims (10)
1. injecting plasticizing device, it is characterised in that including injection tube, plasticized screw, driving mechanism, ball-screw, ball ejector sleeve
And injecting motor；The injection tube is equipped with the cavity for accommodating the plasticized screw front end, one end of the driving mechanism with it is described
The rear-end transmission connection of plasticized screw, the other end couples with the ball-screw, the ball ejector sleeve respectively with the ball wire
Thick stick and injecting motor connection, transmission is rolled to be formed.
2. injecting plasticizing device according to claim 1, it is characterised in that be additionally provided with the upside of the injection tube for moulding
Material enters the feed inlet of the cavity.
3. direct-drive type injecting plasticizing device according to claim 2, it is characterised in that the driving mechanism joins including screw rod
Axis device, plasticizing are synchronous from wheel, plasticizing synchronous belt, the synchronous main wheel of plasticizing and plasticizing motor；The screw rod shaft coupling and the plasticizing
It is synchronous synchronously to pass through the plasticizing toothed belt transmission connection, institute from wheel and the synchronous main wheel of plasticizing from wheel driving coupling, the plasticizing
State plasticizing motor main wheel driving coupling synchronous with the plasticizing.
4. injecting plasticizing device according to claim 3, it is characterised in that one end of the screw rod shaft coupling and the modeling
Change the rear-end transmission connection of screw rod, the other end couples with the ball-screw.
5. the control system of injecting plasticizing device, it is characterised in that including microcontroller, operator control panel, power supply, injection servo-drive
Device, plasticizing servo-driver, current detection module, injecting motor and plasticizing motor；The operator control panel, power supply, injection servo are driven
Dynamic device and plasticizing servo-driver are connected with the microcontroller；The current detection module and injecting motor with the note
Servo-driver connection is penetrated, the plasticizing motor is connected with the plasticizing servo-driver.
6. a kind of plasticizing method, it is characterised in that using the injecting plasticizing device as described in Claims 1-4 any one, tool
Body plasticizing process is as follows：
Step 1, promotes plasticized screw to advance, and realizes injection；
Step 2, judges whether plasticized screw reaches precalculated position；If it is, three are entered step, if it is not, then returning to step
Rapid one；
Step 3, is plasticized plastics；
Step 4, judges whether current detecting reaches；If it is, five are entered step, if it is not, then return to step three；
Step 5, plasticized screw retreats, to keep the pressure of plasticized screw front end；
Step 6, judges whether plasticizing metering meets；If it is, seven are entered step, if it is not, then return to step three；
Step 7, completes plasticizing.
A kind of 7. plasticizing method according to claim 6, it is characterised in that in the step 1, including herein below；Note
Motor reversal is penetrated, promotes plasticized screw to advance to the left, realizes injection.
A kind of 8. plasticizing method according to claim 6, it is characterised in that in the step 3, including herein below；Modeling
Change motor to rotate in an anti-clockwise direction, plastic raw materials, which enter in injection tube, to be squeezed, shear, is vented and is homogenized.
A kind of 9. plasticizing method according to claim 6, it is characterised in that in the step 4, including herein below；Electricity
Stream detection is detected using current detection module, and the current detection module is connected with injection servo-driver, gathers injecting motor
The torque electrostatic current signal of implementation, is transferred to injection servo-driver, implements closed-loop current control, in injection process, adjusts
The forward thrust of plasticized screw, the head of plasticized screw collides with injection tube during advancing to avoid plasticized screw.
A kind of 10. plasticizing method according to claim 6, it is characterised in that in the step 5, including herein below；
The melt plastics that plasticized screw front end has been plasticized constantly are accumulated, and after reaching certain density, pressure, pressure are produced to plasticized screw front end
Power is acted on ball-screw through machine driving, is formed and is produced reverse statical moment to injecting motor axis, promotes injecting motor to rotate forward,
Plasticized screw is driven to retreat to the right.
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| CN112824090A (en) * | 2019-11-21 | 2021-05-21 | 台达电子工业股份有限公司 | Control method of all-electric plastic injection molding machine |
| CN113459385A (en) * | 2020-03-31 | 2021-10-01 | 住友重机械工业株式会社 | Injection molding machine |
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