CN1765611A - Plastic jetting-moulding machine control device and method - Google Patents
Plastic jetting-moulding machine control device and method Download PDFInfo
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- CN1765611A CN1765611A CN 200410081266 CN200410081266A CN1765611A CN 1765611 A CN1765611 A CN 1765611A CN 200410081266 CN200410081266 CN 200410081266 CN 200410081266 A CN200410081266 A CN 200410081266A CN 1765611 A CN1765611 A CN 1765611A
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Abstract
The invention discloses a control device of injection machine, comprising a data collection processing device for collecting the working condition signals of mould-locking device, gel-injection device, gel-melt device, cooling device, mould-open device and the lift-out device to be calculated into digital signal. The invention also disclose the control method of injector machine which is characterized in that the real-time detecting step for collecting and processing the working condition signals, and according to the processed signal, sending control signal to control the process, while said processes comprises: mould-locking, gel-injection, gel-melt, cooling, mould-open and the lift-out. The invention can effectively control the injection machine to control the quality of product with better power-saving effect.
Description
Technical field
The present invention relates to a kind of control device that is used for injection machine.The present invention relates to a kind of control method of injection machine simultaneously.
Background technology
Current injection machine workflow all by locked mode, injection, melten gel, cooling, die sinking, eject and form.Injection machine is the key equipment of plastic shaping, and its main power consumption is the hydraulic oil pump of driven by motor, accounts for complete machine load 70% load power.Injection moulding manufacturing industry job specification is " circulation is uninterrupted continuously produces ".In the past, after motor starts, be exactly at full speed, full voltage (380V), frequency 50Hz running.Press manufacturing technique requirent, injection machine changes the demand of hydraulic pump flow and pressure, and motor is not to be in full load condition all the time, on average has only 60% load factor.About 40% (or more) waste of energy are arranged in technology zero load and underloading time, energy is put back to fuel tank through flow proportion valve and pressure proportioning valve control by overflow valve, and the most consumer of motor inductive load power factor (PF) can not get capacitance compensation.Waste of energy is very serious.On July 28th, 2004 Granted publication Chinese patent ZL02138601.3 in a kind of energy saver and power-economizing method thereof of frequency conversion injection machine are disclosed, it comprises controller of plastic injection molding, driver element, pressure control unit, frequency change servo controller and pipe pressure sensor and speed probe, described driver element comprises motor and the oil pump that can slowly run again, input to control signal corresponding of frequency change servo controller after the technological parameter signal comparison process that described pressure control unit is set the system pressure feedback signal and the controller of plastic injection molding of the pressure sensor that receives, described speed probe is input to the motor speed signal that collects in the frequency change servo controller, frequency change servo controller is according to the frequency variation signal of above-mentioned control signal and the rotation of tach signal output control corresponding motor, and motor drives the flow that technological requirement is satisfied in oil pump output by shaft coupling.But there is following shortcoming in this device: 1) unstable product quality, and it gathers signal by flow proportion valve and pressure proportioning valve, changes into the current and voltage signals of 4～20 milliamperes or 0～10 volt; 2) can not control the stability of product; 3) the coaxial heavy wool pump of injection machine, old-fashioned oily system type injection machine do not have the unit of flow proportion valve and pressure proportioning valve unit, a plurality of flow proportion valve and pressure proportioning valve more than 600 tons, and analogue technique can't realize controlling; 4) the analog signal control accuracy is low.
Summary of the invention
Technical problem to be solved by this invention provides a kind of control device of injection machine, and it can make the quality and the stable yield of injection machine product.
The technical problem that the present invention further will solve provides a kind of control device of injection machine, is easy to the coaxial heavy wool pump of injection machine more than 600 tons, old-fashioned oily system type injection machine are not had the unit realization control of flow proportion valve and pressure proportioning valve unit, a plurality of flow proportion valve and pressure proportioning valve.
The inferior technical problem that further will solve of the present invention provides a kind of control device of injection machine, control accuracy height.
Another technical problem to be solved by this invention provides a kind of control method of injection machine, and it can make the injection machine constant product quality.
In order to solve the problems of the technologies described above, technical scheme of the present invention is:
A kind of injection machine control device comprises data acquisition processing device, is used to gather clamping apparatus, injection device, melten gel device, cooling device, the working state signal of die-sinking device and liftout attachment and be data signal with this working state signal computing; It is characterized in that: also comprise control module, described control module receives the data signal of described data acquisition processing device output, and sends control signal to clamping apparatus according to the data signal of input, the injection device, melten gel device, cooling device, die-sinking device and liftout attachment.
Described control module is programmable logic controller PLC.
Also comprise frequency converter, this frequency converter is used to receive the control signal that described control module transmits, and according to this control signal control rotating speed of motor.
Described data acquisition processing device links to each other with the input able to programme or the pulse input end of described frequency conversion.
A kind of injection machine control method, it is characterized in that: comprise real-time monitoring step, the working state signal that is used for collection technology, and this working state signal handled, and send control signal according to the working state signal after handling and control technology, described technology is followed successively by locked mode technology, injection technology, melten gel technology, process for cooling, die sinking technology and ejects technology.
Described real-time monitoring step comprises the steps:
1) signals collecting step is used for the working state signal of collection technology;
2) signal treatment step is used for the working state signal establishment is data signal;
3) judge comparison step, be used for data signal after the establishment and the parameter preset that is stored in the control module are compared;
4) the control step is sent the technology that control signal is controlled injection machine, is used for carrying out next technology when judging that comparison step satisfies the parameter preset that is stored in the control module, restarts locked mode technology otherwise turn back to locked mode technology.
Technique effect of the present invention is:
(1) product of this injection machine is stable.Its principle is such, all comprise real-time monitoring step in each technology, this real-time monitoring step is used for the working state signal of collection technology, and this working state signal handled, and send control signal according to the working state signal after handling and control technology, when satisfying condition, carry out next technology, restart locked mode technology otherwise turn back to locked mode technology, thus the quality and the output of the product that guarantees effectively.
(2) can control the stability of product.Thereby the stability of product is controlled by the parameter preset scope in the control module of being stored in is provided with, when the stability requirement of product is relatively hanged down, can select the scope of a relative broad, when to the stability requirement of product when higher, can select the scope of a relative narrower.
(3) be easy to the coaxial heavy wool pump of injection machine more than 600 tons, old-fashioned oily system type injection machine does not have flow proportion valve and the pressure proportioning valve unit is controlled.The synchronizing signal of the injection machine process sensor being moved by employing PLC scans, computing becomes binary number, and needn't gather signal by flow proportion valve and pressure proportioning valve, as long as do not have flow proportion valve and pressure proportioning valve unit sensor installation, just can realize control to them at the coaxial heavy wool pump of injection machine more than 600 tons, old-fashioned oily system type injection machine.
(4) control accuracy height.The present invention adopts PLC digital control, and periodic duty digital control frequency precision is about 0.01Hz, and simulation controlled frequency precision is about 0.5Hz, and the digital control frequency precision is higher about 50 times than simulation controlled frequency precision.
(5) energy-saving effect is better.Utilize data signal to control frequency converter, control rotating speed of motor by frequency converter, because digital control precision height, so energy-conservation better effects if, and the synchronizing signal that adopts PLC to gather the action of injection machine process sensor scans, computing becomes binary number, man-machine exchange interface according to injection machine shows the " locked mode of looking; injection; melten gel; take out glue; cooling; die sinking, eject " pressure; the condition of flow and velocity pressure parameter percentage and other parameters; cooperate the inner content parameters that needs to set the address of frequency converter; frequency converter is gone to visit the content of each process section port address unit of PLC management software program output by setup parameter by CPU; realize frequency converter and injection machine synchronous variable-speed, thereby reach purpose of energy saving.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Fig. 1 injection machine control device of the present invention structural representation;
Fig. 2 injection machine control method of the present invention schematic flow sheet.
The specific embodiment
A kind of injection machine control device comprises data acquisition processing device 1, is used to gather clamping apparatus 2, injection device 3, melten gel device 4, cooling device 5, the working state signal of die-sinking device 6 and liftout attachment 7 and be data signal with this working state signal computing; Also comprise control module 8, described control module 8 receives the data signal of described data acquisition processing device 1 output, and sends control signal to clamping apparatus 2 according to the data signal of input, injection device 3, melten gel device 4, cooling device 5, die-sinking device 6 and liftout attachment 7.
Described control module 8 is programmable logic controller PLC.
Also comprise frequency converter 9, this frequency converter 9 is used to receive the control signal that described control module 8 transmits, and according to this control signal control rotating speed of motor.Described data acquisition processing device 1 links to each other with the input able to programme of described frequency converter 9.
A kind of injection machine control method, it is characterized in that: comprise real-time monitoring step, the working state signal that is used for collection technology, and this working state signal handled, and send control signal according to the working state signal after handling and control technology, described technology is followed successively by locked mode technology, injection technology, melten gel technology, process for cooling, die sinking technology and ejects technology.
Described real-time monitoring step comprises the steps:
1) signals collecting step is used for the working state signal of collection technology;
2) signal treatment step is used for the working state signal establishment is data signal;
3) judge comparison step, be used for data signal after the establishment and the parameter preset that is stored in the control module are compared;
4) the control step is sent the technology that control signal is controlled injection machine, is used for carrying out next technology when judging that comparison step satisfies the parameter preset that is stored in the control module, restarts locked mode technology otherwise turn back to locked mode technology.
Fig. 1 is the structural representation of a specific embodiment of injection machine control device of the present invention, described injection machine control device, comprise, data acquisition processing device 1, be used to gather clamping apparatus 2, injection device 3, melten gel device 4, cooling device 5, the working state signal of die-sinking device 6 and liftout attachment 7 and be data signal with this working state signal computing; Also comprise control module 8, described control module 8 receives the data signal of described data acquisition processing device 1 output, and sends control signal to clamping apparatus 2 according to the data signal of input, injection device 3, melten gel device 4, cooling device 5, die-sinking device 6 and liftout attachment 7.Wherein, described control module 8 is programmable logic controller PLC.Also comprise frequency converter 9, this frequency converter 9 is used to receive the control signal that described control module 8 transmits, and according to this control signal control rotating speed of motor.Described data acquisition processing device 1 links to each other with the input able to programme of described frequency converter 9.
In another specific embodiment of injection machine control device of the present invention, described data acquisition processing device 1 links to each other with the pulse input end of described frequency converter 9.
Fig. 2 is an injection machine control method schematic flow sheet of the present invention.The flow process of described control method is: behind the locked mode, data acquisition processing device 1 is gathered the working state signal of locked mode technology, this working state signal establishment is binary digit, this binary signal is input to control module 8 to be judged, when satisfying condition, carry out injection technology, otherwise locked mode, the wherein condition that is satisfied again: down carry out when 1) locked mode pressure satisfies preset value otherwise turn back to locked mode technology and restart; Down carry out when 2) limit switch satisfies preset value otherwise turn back to locked mode technology and restart; Down carry out otherwise turn back to locked mode technology when 3) electronic ruler tolerance satisfies preset value and restart; Down carry out when 4) the locked mode time is satisfied preset value otherwise turn back to locked mode technology and restart; Down carry out when 5) flow proportional satisfies preset value otherwise turn back to locked mode technology and restart.After the injection, data acquisition processing device 1 is gathered the working state signal of injection technology, this working state signal establishment for being input to control module 8, binary digital signal is judged, when satisfying condition, carry out the sub-technology of pressurize in the melten gel technology, otherwise locked mode, the wherein condition that is satisfied again: down carry out when 1) the injection amount satisfies preset value otherwise turn back to locked mode technology and restart; Down carry out when 1) the injection time is satisfied preset value otherwise turn back to locked mode technology and restart; Down carry out when 2) injection pressure satisfies preset value otherwise turn back to locked mode technology and restart; Down carry out when 3) limit switch satisfies preset value otherwise turn back to locked mode technology and restart.Down carry out when 4) the injection amount satisfies preset value otherwise turn back to locked mode technology and restart.After the sub-technology retraction technology in the collosol craft, data acquisition processing device 1 is gathered the working state signal of the sub-technology of retraction, this working state signal establishment for being input to control module 8, binary digital signal is judged, when satisfying condition, carry out process for cooling, otherwise locked mode, the wherein condition that is satisfied again: down carry out when 1) the retraction time is satisfied preset value otherwise turn back to locked mode technology and restart; Down carry out when 2) back pressure pressure satisfies preset value otherwise turn back to locked mode technology and restart; Down carry out otherwise turn back to locked mode technology when 3) electronic ruler tolerance satisfies preset value and restart; Down carry out when 4) limit switch satisfies preset value otherwise turn back to locked mode technology and restart.After the cooling, data acquisition processing device 1 is gathered the working state signal of process for cooling, this working state signal establishment for being input to control module 8, binary digital signal is judged, when satisfying condition, carry out die sinking technology, otherwise locked mode, the wherein condition that is satisfied again: down carry out when satisfy preset value cool time otherwise turn back to locked mode technology and restart.After the die sinking, data acquisition processing device 1 is gathered the working state signal of die sinking technology, this working state signal establishment for being input to control module 8, binary digital signal is judged, when satisfying condition, eject technology, otherwise locked mode, the wherein condition that is satisfied again: down carry out when 1) the die sinking time is satisfied preset value otherwise turn back to locked mode technology and restart; Down carry out when limit switch satisfies preset value otherwise turn back to locked mode technology and restart; Down carry out otherwise turn back to locked mode technology when 2) electronic ruler tolerance satisfies preset value and restart; Down carry out when 3) limit switch satisfies preset value otherwise turn back to locked mode technology and restart.After ejecting, data acquisition processing device 1 is gathered the working state signal that ejects technology, this working state signal establishment for being input to control module 8, binary digital signal is judged, when satisfying condition, get goods, otherwise locked mode, the wherein condition that is satisfied again: down carry out when 1) ejection cycle satisfies preset value otherwise turn back to locked mode technology and restart; Down carry out when 2) limit switch satisfies preset value otherwise turn back to locked mode technology and restart.
Its energy-conservation principle is such, the synchronizing signal that adopts PLC to gather the action of injection machine process sensor scans, computing becomes binary number, man-machine exchange interface according to injection machine shows the " locked mode of looking; injection; melten gel; take out glue; cooling; die sinking, eject " pressure; the condition of flow and velocity pressure parameter percentage and other parameters; cooperate the inner content parameters that needs to set the address of frequency converter; frequency converter is gone to visit the content of each process section port address unit of PLC management software program output by setup parameter by CPU; realize frequency converter and injection machine synchronous variable-speed, energy-conservation stable operation.
Determining of each band frequency:
(1) because in the different operation stage of a process cycles in the cycle, injection machine has different demands to flow.Injection moulding process generally has following 7 operation stages successively: locked mode technology, injection technology, melten gel technology, process for cooling, die sinking technology, eject technology and get goods.At each operation stage, to a definite flow should be arranged.Because the flow and the rotating speed of motor of hydraulic pump have following relation:
Q＝nq (1)
In the formula (1):
N: motor speed;
Q: hydraulic pressure pump delivery;
Q: the flow of hydraulic pump.
Rotating speed of motor can be expressed as:
n＝60f/p (2)
In the formula (2):
F: supply frequency;
P: motor pole logarithm;
N: motor speed.
With formula (1), (2) combination, can obtain:
Q＝60f/qp＝kf (3)
In the formula (3):
K: proportionality coefficient, k=60q/p.
For each flow of determining,, all have a frequency corresponding with it according to formula (3):
f＝Q/k (4)
According to formula (4), just the flow establishment of each operation stage can be corresponding frequency.List the frequency of each operation stage then, so just solved the problem that frequency is determined.
| Test (one) | ① | ② | ③ | ④ | ⑤ | ⑥ | ⑦ | ⑧ | ||
| Plane No. | #36 | Conversion is for per hour | ||||||||
| Power | 29.4KW | Time | Δt | Counting | Output | Code | Electric weight | Output | KWh | |
| A | Transform preceding 19/5 | Beginning | 14:57 | 60’ | 768 | 106 | 798.8 | 12.8 | 106 | 12.8 |
| B | Finish | 15:57 | 874 | 811.6 | ||||||
| C | Transform back 20/5 | Beginning | 17:45 | 89’ | 796 | 159 | 100.3 | 10.0 | 107.2 | 6.74 |
| D | Finish | 19:14 | 955 | 110.3 | ||||||
Table 1
| Test (two) | ① | ② | ③ | ④ | ⑤ | ⑥ | ⑦ | ⑧ | ||
| Plane No. | #38 | Conversion is for per hour | ||||||||
| Power | 37KW | Time | Δt | Counting | Output | Code | Electric weight | Output | KWh | |
| A | Transform preceding 24/5 | Beginning | 18:25 | 58’ | 702 | 81 | 6483 | 16 | 83.8 | 16.6 |
| B | Finish | 19:23 | 783 | 6499 | ||||||
| C | Transform back 24/5 | Beginning | 21:05 | 63’ | 017 | 88 | 6505 | 7 | 83.8 | 6.7 |
| D | Finish | 22:08 | 105 | 6512 | ||||||
Table 2
| Conclusion (of pressure testing) | 9. month amount of electricity saving=, (A 8.-C 8.) * 720h 10. 13. power saving rates of month economize on electricity expense=9. * 0.88 yuan/KWh 12. investment payback time=11./10.=, (A 8.-B 8.)/A 8. | |||||
| ⑨ | ⑩ | 11. | 12. | 13. | ||
| Plane No. | Month amount of electricity saving | Moon economize on electricity expense | Improvement expenses | Investment payback time | Power saving rate | |
| KWh | Unit | Ten thousand yuan | Month | ％ | ||
| 36 | 4363 | 3840 | 3.30 | 8.6 | 47.3 | |
| 38 | 7128 | 6273 | 4.07 | 6.5 | 59.6 | |
Table 3
From table 1 to table 3 as can be seen, utilize the control device of injection machine of the present invention after, realize frequency converter and injection machine synchronous variable-speed, energy-conservation stable operation, energy-saving effect is obvious.
Claims (10)
1. an injection machine control device comprises,
Data acquisition processing device (1) is used to gather clamping apparatus (2), injection device (3), melten gel device (4), cooling device (5), the working state signal of die-sinking device (6) and liftout attachment (7) and be data signal with this working state signal computing;
It is characterized in that: also comprise control module (8), described control module (8) receives the data signal of described data acquisition processing device (1) output, and send control signal according to the data signal of input and arrive clamping apparatus (2), injection device (3), melten gel device (4), cooling device (5), die-sinking device (6) and liftout attachment (7).
2. injection machine control device according to claim 1 is characterized in that: described control module (8) is programmable logic controller PLC.
3. injection machine control device according to claim 1 and 2 is characterized in that: also comprise frequency converter (9), this frequency converter (9) is used to receive the control signal that described control module (8) transmits, and according to this control signal control rotating speed of motor.
4. injection machine control device according to claim 3 is characterized in that: described data acquisition processing device (1) links to each other with the input able to programme or the pulse input end of described frequency converter (9).
5. injection machine control method, it is characterized in that: comprise real-time monitoring step, the working state signal that is used for collection technology, and this working state signal handled, and send control signal according to the working state signal after handling and control technology, described technology is followed successively by locked mode technology, injection technology, melten gel technology, process for cooling, die sinking technology and ejects technology.
6. injection machine control method according to claim 5 is characterized in that: described real-time monitoring step comprises the steps:
1) signals collecting step is used for the working state signal of collection technology;
2) signal treatment step is used for the working state signal establishment is data signal;
3) judge comparison step, be used for data signal after the establishment and the parameter preset that is stored in the control module are compared;
4) the control step is sent the technology that control signal is controlled injection machine, is used for carrying out next technology when judging that comparison step satisfies the parameter preset that is stored in the control module, restarts locked mode technology otherwise turn back to locked mode technology.
7. according to claim 5 or 6 described injection machine control methods, it is characterized in that: locked mode technology is stored in the control module parameter preset and comprises locked mode time, locked mode pressure, limit switch, electronic ruler tolerance and flow proportional.
8. according to claim 5 or 6 described injection machine control methods, it is characterized in that: injection technology is stored in that parameter preset comprises injection amount, injection time and limit switch in the control module.
9. according to claim 5 or 6 described injection machine control methods, it is characterized in that: melten gel technology is stored in that parameter preset comprises electronic ruler tolerance, back pressure pressure, limit switch and retraction time in the control module.
10. according to claim 5 or 6 described injection machine control methods, it is characterized in that: process for cooling is stored in that parameter preset is cool time in the control module.
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| CN 200410081266 CN1765611A (en) | 2004-11-12 | 2004-11-12 | Plastic jetting-moulding machine control device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411843C (en) * | 2006-07-31 | 2008-08-20 | 中北大学 | Multipurpose polymer forming machine |
| CN103064372A (en) * | 2012-12-17 | 2013-04-24 | 宁波弘讯科技股份有限公司 | Injection molding machine management system and method thereof |
| CN105149246A (en) * | 2015-10-10 | 2015-12-16 | 上海亚虹模具股份有限公司 | Sorting method and device of injection moulding abnormal product |
| CN106965397A (en) * | 2017-05-30 | 2017-07-21 | 天津颐和中威精密机器有限公司 | A kind of injection molding counting control system |
| CN107942941A (en) * | 2017-11-30 | 2018-04-20 | 海天塑机集团有限公司 | A kind of method and system of injection molding machine and electric turntable interactive signal |
| CN108050132A (en) * | 2017-12-07 | 2018-05-18 | 海天塑机集团有限公司 | The oil temperature keeping method and system of a kind of electric-hydraulic combined injection molding machine |
| CN109966996A (en) * | 2019-02-26 | 2019-07-05 | 武汉恒力华振科技有限公司 | A kind of system using the melting state in big data analysis prediction hot melt adhesive production process |
| CN110142940A (en) * | 2019-04-15 | 2019-08-20 | 中山市物语云物联网科技股份有限公司 | Non-defective unit detection method and device applied to injection mold |
| CN111025892A (en) * | 2019-11-19 | 2020-04-17 | 珠海格力智能装备有限公司 | Synchronous control method and device for driving motor |
| CN114571689A (en) * | 2022-03-07 | 2022-06-03 | 宁波方正汽车模具股份有限公司 | Mold production online sensing method based on big data and artificial intelligence |
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2004
- 2004-11-12 CN CN 200410081266 patent/CN1765611A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411843C (en) * | 2006-07-31 | 2008-08-20 | 中北大学 | Multipurpose polymer forming machine |
| CN103064372A (en) * | 2012-12-17 | 2013-04-24 | 宁波弘讯科技股份有限公司 | Injection molding machine management system and method thereof |
| CN105149246A (en) * | 2015-10-10 | 2015-12-16 | 上海亚虹模具股份有限公司 | Sorting method and device of injection moulding abnormal product |
| CN106965397A (en) * | 2017-05-30 | 2017-07-21 | 天津颐和中威精密机器有限公司 | A kind of injection molding counting control system |
| CN107942941A (en) * | 2017-11-30 | 2018-04-20 | 海天塑机集团有限公司 | A kind of method and system of injection molding machine and electric turntable interactive signal |
| CN108050132A (en) * | 2017-12-07 | 2018-05-18 | 海天塑机集团有限公司 | The oil temperature keeping method and system of a kind of electric-hydraulic combined injection molding machine |
| CN109966996A (en) * | 2019-02-26 | 2019-07-05 | 武汉恒力华振科技有限公司 | A kind of system using the melting state in big data analysis prediction hot melt adhesive production process |
| CN110142940A (en) * | 2019-04-15 | 2019-08-20 | 中山市物语云物联网科技股份有限公司 | Non-defective unit detection method and device applied to injection mold |
| CN111025892A (en) * | 2019-11-19 | 2020-04-17 | 珠海格力智能装备有限公司 | Synchronous control method and device for driving motor |
| CN111025892B (en) * | 2019-11-19 | 2023-10-03 | 珠海格力智能装备有限公司 | Synchronous control method and device for driving motor |
| CN114571689A (en) * | 2022-03-07 | 2022-06-03 | 宁波方正汽车模具股份有限公司 | Mold production online sensing method based on big data and artificial intelligence |
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