CN100491106C - Full electronic servo control system in use for plastic-injection moulding machine - Google Patents
Full electronic servo control system in use for plastic-injection moulding machine Download PDFInfo
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- CN100491106C CN100491106C CNB2003101083728A CN200310108372A CN100491106C CN 100491106 C CN100491106 C CN 100491106C CN B2003101083728 A CNB2003101083728 A CN B2003101083728A CN 200310108372 A CN200310108372 A CN 200310108372A CN 100491106 C CN100491106 C CN 100491106C
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Abstract
A full-electronic servo control system for the injection moulding machine of plastics is composed of the master controller consisting of master control module, communication module, temp control module, servo control module, I/O module and pressure feedback module, man-machine interactive unit, temp controller, pressure sensor, and 4-axle servo motor for injection, preplasticizing, closing mould and demoulding. Its advantages are high speed and precision and low noise.
Description
Technical field
The present invention relates to be used for the control system of injection machine, relate in particular to the all-electronin servo-control system that is used for plastic-injection moulding machine.
Technical background
Developed from the 1950's since the plastic processing machinery of oil pressure actuated, the drive system of plastic processing machinery is used oil pressure so far always, although along with the development of microelectric technique, the control section of plastic processing machinery has adopted micro computer, and drive part never has significant improvement.Traditional injection machine, its injection, preformed, matched moulds, eject etc. and to drive with hydraulic jack, drive such as the injection hydraulic jack, conventional hydraulic formula injection machine is by the Motor Drive hydraulic oil pump, adopt hydraulic oil as driving medium, realize that by hydraulic jack coupled screw rod moves forward and backward, promote the interior plastics of barrel and penetrate that its speed is regulated and relied on flow valve openings of sizes to mould, or the displacement variation of hydraulic oil pump changes the flow of hydraulic jack, and its screw acting power size relies on the relief valve set pressure in hydraulic system to realize.This is that the plastics machinery of drive source exists following defective with the oil pressure: the one, and variation of temperature, continuous action changes oily temperature for a long time, thereby the acting characteristic of influence machinery makes the precision of make-up machine keep taking place difficulty, simultaneously, influence mould open/close speed and stop position precision; The 2nd, the viscoplasticity of oil and the elasticity of pipe-line system can not be ignored, make produced between actual issuing velocity and pressure non-linear, control performance is degenerated, and this phenomenon is bigger to the high speed and precision shaping influence, and the influence of friction easily produces creeping phenomenon in the oil cylinder simultaneously; The 3rd, the servo valve of oil pressure action oil, the work of proportional control valve worsens, and makes the maintenance of performance produce difficulty; The 4th, the fault of complicated oil hydraulic system increases maintenance time and expense greatly.
The saving of the environmental protection and the energy is subjected to people's common attention; and the hydraulic type plastics machinery causes pollution as seepage and noise-like to environment; and it is again the machinery of a large amount of consumed powers; oil pressure actuated is greatly limited from its ability of saving the energy of structure, and the electric servomotor type of drive could overcome the above problems well.But require very high to its control; Now, the miniaturization of electric product (as precision connector), the precise treatment and the DVD of future generation of the optics that OA (office automation) machine uses have higher requirement to plastic material and forming technique thereof, and industries such as household electrical appliances, electronics, automobile, communication, medicine equipment and OA are also more and more stricter in performance demands aspect the accuracy reappearance to injection machine.The frivolous miniaturization of plastic products has been the focus of market competition, and ejection formation has surpassed the ability of existing hydraulic injection molding machine to high-precision requirement.
Summary of the invention
Technical problem to be solved by this invention is at the prior art present situation, and a kind of all-electronin servo-control system that is used for plastic-injection moulding machine is provided, and this system can realize at a high speed plastic-injection moulding machine, high accuracy, and low noise, no greasy dirt dyes the control of processing.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the all-electronin servo-control system that is used for plastic-injection moulding machine, comprise the master controller that is used to connect and control the injection machine body, this master controller connects human-computer interaction device by signal cable respectively, be connected to the temperature controller of heater, pressure sensor and the injection that connects through the servo unit of correspondence, preformed, matched moulds, 4 servo motors that eject, the measure of taking also comprises:
Described servo motor as power source be used to drive plastic-injection moulding machine injection, reinforced, die sinking, matched moulds, eject, the top deactuate does;
Described master controller has the main control module, and has a communication module by this main control module controls, temperature control modules, the SERVO CONTROL module, switching value input output module and pressure feedback module, described communication module is used to control described human-computer interaction device, described temperature control modules is used to control described heater, described SERVO CONTROL module is used for controlling respectively described injection, preformed, matched moulds, eject servo motor, the input of described switching value output module be used to detect the action of the state and the control injection machine of injection machine, described pressure control module is used to receive and the feedback signal of processing pressure sensor;
Above-mentioned main control module has the computer program of working out through in advance, by described servo unit through described servo motor, to injection speed, injection position, the closed-loop control of injection pressure, closed-loop control to reinforced back pressure, the closed-loop control of screw speed when reinforced, position during to the moving platen die sinking, speed closed loop control, moving platen is opened torque limited when touching, position during to the moving platen matched moulds, the closed-loop control of speed, torque limited during to the moving platen matched moulds, position when thimble is ejected, the closed-loop control of speed, torque limited when thimble is ejected, position during to the thimble rollback, the closed-loop control of speed, the torque limited during to the thimble rollback;
The main control module also has the effect of accurate control clamp force;
Above-mentioned torque limited during to the moving platen matched moulds has the protective effect of low pressure mould.
For optimizing technique scheme, the measure of being taked also comprises:
Above-mentioned main control module has the characteristic of control plastic products quality; Described main control module also has injecting condition real-time tracking statistics and comprehensive statistics; Above-mentioned tracking statistics includes 5 quality control data: the injection starting point, and the injection terminal point, surge pressure, V → P position, V → P pressure, described comprehensive statistics has described 5 quality control data maximum, minimum of a value and mean value in groups.
Above-mentioned human-computer interaction device can be respectively LCD and the manual operation panel that has touch-screen, it cooperatively interacts and is used for the input of technological parameter, and data/figure shows, can show each shaft position in real time, speed, pressure, time, temperature, injection pressure-injection speed curve, pre-blow pressure-preformed rate curve, injection terminal point curve, temperature-time curve;
But this above-mentioned operation of LCD picture has 7 homepages, 20 subpage frames, 177 setup parameters and 68 software selector switches.
Compared with prior art, the present invention adopt servo motor as power source be used to drive plastic-injection moulding machine injection, reinforced, die sinking, matched moulds, eject, the top deactuate does; Adopt master controller to have the main control module, and have communication module by its control, temperature control modules, SERVO CONTROL module, switching value input output module and pressure feedback module, and pass through corresponding module controls human-computer interaction device, heater, servo motor, and the state and the action of control injection machine and the feedback signal of reception and processing pressure sensor that detect injection machine.Its man-machine interface close friend, the colour liquid crystal display device of band touch-screen, clear display, easy to operate; Injection process adopts the control of pressure limiting speed, suppresses the generation of pressure peak effectively, simultaneously, has the real-time demonstration of injection pressure and rate curve; Adopt exterior storage, can store the technological parameter of selected goods.Thereby plastic-injection moulding machine can be realized at a high speed, high accuracy, low noise, no greasy dirt dyes the control of processing.
Description of drawings
Fig. 1 is a hardware configuration block diagram of the present invention;
Fig. 2 is a software configuration block diagram among Fig. 1.
Specific embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
Fig. 1, shown in Figure 2, the all-electronin servo-control system that is used for plastic-injection moulding machine, comprise the master controller 1 that is used to connect and control injection machine body 5, this master controller 1 connects human-computer interaction device 2 by signal cable respectively, be connected to the temperature controller 3 of heater 4, pressure sensor 6 and the injection that connects through the servo unit of correspondence, preformed, matched moulds, 4 servo motors 7 that eject, servo motor 7 by injection motor 71, preformed motor 72, matched moulds motor 73, eject motor 74 and form.
Servo motor 7 as power source be used to drive plastic-injection moulding machine injection, reinforced, die sinking, matched moulds, eject, the top deactuate does;
Master controller 1 has main control module 11, and have communication module 12 by this main control module 11 control, temperature control modules, SERVO CONTROL module, switching value input output module and pressure feedback module.
Main control module 11 includes central processing unit (CPU), dynamic memory (RAM), and electric board (DOM), serial communication interface has the mass storage that the access of moulding process data is used, and uses for user access processing technology data.The operation of other module in the software-driven master controller of operation in main control module 11; Main control module 11 is connected with other module in the master controller by internal bus.Main control module 11 has the computer program of working out through in advance, by described servo unit through described servo motor, to injection speed, injection position, the closed-loop control of injection pressure, closed-loop control to reinforced back pressure, the closed-loop control of screw speed when reinforced, position during to the moving platen die sinking, speed closed loop control, moving platen is opened torque limited when touching, position during to the moving platen matched moulds, the closed-loop control of speed, torque limited during to the moving platen matched moulds, position when thimble is ejected, the closed-loop control of speed, torque limited when thimble is ejected, position during to the thimble rollback, the closed-loop control of speed, the torque limited during to the thimble rollback.In the scheme of optimizing, main control module 11 has the characteristic of control plastic products quality; Main control module 11 also has injecting condition real-time tracking statistics and comprehensive statistics, follow the tracks of statistics and include 5 quality control data: the injection starting point, the injection terminal point, surge pressure, V → P position, V → P pressure, described comprehensive statistics has described 5 quality control data maximum, minimum of a value and mean value in groups.Main control module 11 also can have the effect of accurate control clamp force; Torque limited during to the moving platen matched moulds also has the protective effect of low pressure mould.
Communication module 12 is used to control human-computer interaction device, and human-computer interaction device is made up of LCD (LCD) touch-screen and manual operation panel, is used to realize the input of technological parameter, and data/figure show, conversion of page and to the manual operation of machine; LCD and touch-screen are connected with master controller by signal cable; The manual operation panel is connected with master controller by signal cable, and main control module 11 is connected with LCD (LCD) and touch-screen by signal cable, realizes the input of technological parameter, data/figure shows that conversion of page control can show each shaft position in real time, speed, pressure, time, temperature, injection pressure-injection speed curve, pre-blow pressure-preformed rate curve, injection terminal point curve, temperature-time curve.But this operation of LCD picture has 7 homepages, 20 subpage frames, 177 setup parameters and 68 software selector switches.Key frame is: function setting and supervision, injection and preformed, mould open/close control, temperature control, production statistics and seven pictures such as qualitative control, maintenance and alarm.
Temperature control modules is used for control heater, is connected with temperature controller by signal cable, is used to be provided with the temperature parameter of each section heater and reads the Current Temperatures of each bringing-up section; Temperature control can be set at six sections, all can distinguish set temperature value for every section.Heating selects to have five kinds of modes: one for not heating, and two are heating, and three is heating automatically, and four are insulation, and five is automatic heat preserving; And have the overproof warning of high and low temperature; Temperature control display precision is 0.1 ℃.
The SERVO CONTROL module comprises the injection shaft control module, and preformed axle control module, dynamic model control module, thimble control module are respectively applied for control described injection, preformed, matched moulds, eject servo motor.
The injection shaft control module is connected with the injection shaft servo unit by signal cable, and output is to the control command of injection servo motor, and the speed of servo motor, moment of torsion are injected in control simultaneously; Thereby closed loop input constitutes position to injection shaft, speed, the closed-loop control of pressure from the position feedback that is installed in the photoelectric encoder on the injection servo motor with from the pressure feedback of pressure sensor.The injection shaft control module includes the pulse coder receiving circuit, analog quantity voltage output circuit, photoelectricity coupling type switching value imput output circuit.Injection control mode adopts the constant speed level pressure filling control of five fast three pressure-controlled and can carry out the broken line control of broken line control respectively to injection speed, pressurize, back pressure and screw speed, and has the figure demonstration of velocity pressure curve.
Preformed axle control module is connected with axle preformed servo unit by signal cable, and output is controlled the speed of preformed servo motor, moment of torsion simultaneously to the control command of preformed servo motor; The closed loop input is from the position feedback that is installed in the pulse coder on the injection servo motor, thereby formation is to the closed-loop control of injection shaft speed.
Under the effect of control program, injection shaft control module and preformed axle control module are moved simultaneously, realize the reinforced process by backpressure feedback control.Preformed axle control module includes the pulse coder receiving circuit, analog quantity voltage output circuit, photoelectricity coupling type switching value imput output circuit.Preformed is set at three grades, can set and control three grades rotating speed, back pressure, position, time respectively.Feed way has three kinds: the one, and preceding reinforced: it is reinforced to change preformed after injection finishes over to, and the reinforced back injection seat integral body that finishes retreats, and makes nozzle and mold separation; The 2nd, fixing feeding in raw material: it is reinforced to change preformed after injection finishes over to, and reinforced end back injection seat integral body is as you were, and nozzle contacts three all the time with mould be that the back is reinforced: after the injection end, injection seat integral body shrinks back, make nozzle and mold separation, it is reinforced to change preformed then over to, finishes until reinforced.
Dynamic model axle control module is connected with dynamic model axle servo unit by signal cable, and output is controlled the speed of dynamic model servo motor, moment of torsion simultaneously to the control command of dynamic model servo motor; The closed loop input is from the position feedback that is installed in the pulse coder on the dynamic model servo motor, thereby formation is to the position of dynamic model axle, the closed-loop control of speed.The control of dynamic model axle, molding piece include the pulse coder receiving circuit, analog quantity voltage output circuit, photoelectricity coupling type switching value imput output circuit.Mould open/close control: open and be level Four, closing is three grades: can be respectively to speed, moment of torsion (pressure), position, the time is set and control.The mould adjustment is provided with manual and automatic dual mode, has manually and the automatic mold-adjustment function.
Thimble axle control module is connected with thimble axle servo unit by signal cable, and output is controlled the speed of thimble servo motor, moment of torsion simultaneously to the control command of thimble servo motor; The closed loop input is from the position feedback that is installed in the pulse coder on the thimble servo motor, thereby formation is to the position of thimble axle, the closed-loop control of speed.Thimble axle control module includes the pulse coder receiving circuit, analog quantity voltage output circuit, photoelectricity coupling type switching value imput output circuit.Eject and be controlled to be three grades, can set and control speed, pressure, position, time respectively.Ejected three kinds of modes: the thimble function is inoperative, repeats to eject and shake to eject three kinds.
The switching value input/output module is used for the dc switch amount feedback signal that input is installed in the various checkout gears on the controlled object (injection (mo(u)lding) machine), the action that is used to detect the state of injection machine and controls injection machine is used for output simultaneously to being installed in the dc switch amount control signal of the various execution units on the controlled object (injection (mo(u)lding) machine).
The pressure control module is used to receive the also feedback signal of processing pressure sensor.
The man-machine friendly interface of the present invention, 10.4 inches TFT colour liquid crystal display device of band touch-screen has 7 key frames, 20 sprites, clear display, easy to operate; Injection process adopts the control of pressure limiting speed, suppresses the generation of pressure peak effectively, simultaneously, has the real-time demonstration of injection pressure and rate curve; Adopt the CF card to make exterior storage, can store the technological parameter of 64000 goods.And realize production management and qualitative control, can add up the material name of workpiece, mould number, condition of molding, available machine time, cumulative time, access; Can add up workpiece sum, certified products number, number of non-compliances, when continuous appearance three mould defective works, will report to the police; Judge certified products and defective work by penetrating the judgement of terminal point curve, all injection terminal points person in setting tolerance is certified products, otherwise is defective work.Also have the lock pin function, be used to process have hollow, the moulding of shape such as strand tooth etc., two kinds of lock pins can be arranged, have another name called neutron one and neutron two, and can set and control the speed of inserting, loosing core, pressure, the position of two neutrons respectively.Thereby plastic-injection moulding machine can be realized at a high speed, high accuracy, low noise, no greasy dirt dyes the control of processing.
The present invention can connect into Local Area Network with many full electric injection molding machines by GP 2500, carries out the real-time monitoring and the management of factory level.Also can many full electric injection molding machines can be connected with the Intranet of enterprise with main PC, realize whole world full electric injection molding machine is Anywhere carried out remote diagnosis by GP 2500.
Though the present invention illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.
Claims (3)
1, the all-electronin servo-control system that is used for plastic-injection moulding machine, comprise the master controller (1) that is used for connecting and controlling injection machine body (5), this master controller connects human-computer interaction device (2) by signal cable respectively, be connected to the temperature controller (3) of heater (4), pressure sensor (6) and the injection that connects through the servo unit (7) of correspondence, preformed, matched moulds, 4 servo motors (71,72,73,74) that eject is characterized in that:
Described servo motor as power source be used to drive plastic-injection moulding machine injection, reinforced, die sinking, matched moulds, eject, the top deactuate does;
Described master controller (1) has main control module (11), and has a communication module (12) by this main control module (11) control, temperature control modules (13), SERVO CONTROL module (14), switching value input output module (15) and pressure feedback module (16), described communication module (12) is used to control described human-computer interaction device (2), described temperature control modules (13) is used to control described heater (4), described SERVO CONTROL module (14) is used for controlling respectively described injection, preformed, matched moulds, eject servo motor (71,72,73,74), the input of described switching value output module (15) be used to detect the action of the state and the control injection machine of injection machine, described pressure control module (16) is used to receive and the feedback signal of processing pressure sensor;
Described main control module (11) has the computer program of working out through in advance, by described servo unit through described servo motor, to injection speed, injection position, the closed-loop control of injection pressure, closed-loop control to reinforced back pressure, the closed-loop control of screw speed when reinforced, position during to the moving platen die sinking, speed closed loop control, moving platen is opened torque limited when touching, position during to the moving platen matched moulds, the closed-loop control of speed, torque limited during to the moving platen matched moulds, position when thimble is ejected, the closed-loop control of speed, torque limited when thimble is ejected, position during to the thimble rollback, the closed-loop control of speed, the torque limited during to the thimble rollback;
The effect that described main control module (11) has accurate control clamp force;
Described torque limited during to the moving platen matched moulds has the protective effect of low pressure mould.
2, the all-electronin servo-control system that is used for plastic-injection moulding machine according to claim 1 is characterized in that: described main control module (11) has the characteristic of control plastic products quality; Described main control module (11) also has injecting condition real-time tracking statistics and comprehensive statistics; Described tracking statistics includes 5 quality control data: the injection starting point, and the injection terminal point, surge pressure, V → P position, V → P pressure, described comprehensive statistics has described 5 quality control data maximum, minimum of a value and mean value in groups.
3, the all-electronin servo-control system that is used for plastic-injection moulding machine according to claim 1, it is characterized in that: described human-computer interaction device (2) can be respectively LCD (21) and the manual operation panel (22) that has touch-screen, it cooperatively interacts and is used for the input of technological parameter, data/figure shows, can show each shaft position in real time, speed, pressure, time, temperature, injection pressure-injection speed curve, pre-blow pressure-preformed rate curve, injection terminal point curve, temperature-time curve; But described this operation of LCD picture has 7 homepages, 20 subpage frames, 177 setup parameters and 68 software selector switches.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2003101083728A CN100491106C (en) | 2003-11-03 | 2003-11-03 | Full electronic servo control system in use for plastic-injection moulding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2003101083728A CN100491106C (en) | 2003-11-03 | 2003-11-03 | Full electronic servo control system in use for plastic-injection moulding machine |
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| CN1539618A CN1539618A (en) | 2004-10-27 |
| CN100491106C true CN100491106C (en) | 2009-05-27 |
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| CNB2003101083728A Expired - Fee Related CN100491106C (en) | 2003-11-03 | 2003-11-03 | Full electronic servo control system in use for plastic-injection moulding machine |
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| CN100405376C (en) * | 2005-10-18 | 2008-07-23 | 宁波海太高科机械有限公司 | Determination method of plastic injection technological parameter and injection moulding machine |
| CN100588534C (en) * | 2006-09-04 | 2010-02-10 | 广西工学院 | Full-automatic injecting blowing plastic hollow molding machine control device and cybernation method thereof |
| JP5184421B2 (en) * | 2009-03-31 | 2013-04-17 | 住友重機械工業株式会社 | Auxiliary operation control device and auxiliary operation control method |
| CN102019677A (en) * | 2009-09-18 | 2011-04-20 | 广州市香港科大霍英东研究院 | Method for quickly and accurately positioning die in injection molding process |
| WO2011054080A1 (en) * | 2009-11-03 | 2011-05-12 | Husky Injection Molding Systems Ltd. | A method and system for operating an injection molding machine |
| CN101916085B (en) * | 2010-08-05 | 2012-05-30 | 华南理工大学 | Control system and method of glue-injecting motor and glue-smelting motor of electric injection molding machine |
| CN101947840B (en) * | 2010-08-05 | 2013-09-25 | 华南理工大学 | Servo motor control system of all-electric injection molding machine and control method thereof |
| CN102909844B (en) * | 2012-10-23 | 2014-06-25 | 东南大学 | Production method for injection molding machine workpiece production line |
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| CN104015322A (en) * | 2014-03-10 | 2014-09-03 | 东莞市纵横软件开发有限公司 | Numerical control injection molding machine |
| CN104535309B (en) * | 2014-12-17 | 2017-07-11 | 海天塑机集团有限公司 | The method of testing of injection screw check ring response time |
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| CN108762218A (en) * | 2018-06-14 | 2018-11-06 | 台山市心华药用包装有限公司 | A kind of one-step injection blower process intelligent manufacture system Internet-based |
| CN110941247A (en) * | 2019-11-07 | 2020-03-31 | 宁波力劲科技有限公司 | Intelligent cloud die-casting management system and management method for die-casting machine |
| CN110871554A (en) * | 2020-01-20 | 2020-03-10 | 江苏金陵智造研究院有限公司 | Low-power consumption state monitoring equipment |
| CN114103042B (en) * | 2021-10-29 | 2024-02-06 | 广东拓斯达科技股份有限公司 | Control method of injection molding machine, injection molding machine and readable storage medium |
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Owner name: NINGBO CITY YILI PRECISION MECHANISM CO., LTD. Free format text: FORMER OWNER: BEIJING CHENGXINCHANG TECHNOLOGY MANSION CO.,LTD. Effective date: 20090731 |
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