CN101491935A - Charging-basket temperature synchronous control system and method of injection-molding device machine - Google Patents
Charging-basket temperature synchronous control system and method of injection-molding device machine Download PDFInfo
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- CN101491935A CN101491935A CNA200910095350XA CN200910095350A CN101491935A CN 101491935 A CN101491935 A CN 101491935A CN A200910095350X A CNA200910095350X A CN A200910095350XA CN 200910095350 A CN200910095350 A CN 200910095350A CN 101491935 A CN101491935 A CN 101491935A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000001360 synchronised effect Effects 0.000 title claims description 11
- 238000001746 injection moulding Methods 0.000 title abstract description 8
- 238000002347 injection Methods 0.000 claims description 37
- 239000007924 injection Substances 0.000 claims description 37
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 8
- 239000012634 fragment Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 3
- 230000001808 coupling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Abstract
The invention relates to a control device and a control method for an injection moulding machine, and aims to provide a temperature synchronizing system and a temperature synchronizing method of all sections of charging baskets of the injection moulding machine. The system comprises a plurality of electric heaters arranged at all section positions of the charging baskets and temperature sensors arranged on the corresponding positions. Each temperature sensor is connected with a temperature setting module through signal wires; the temperature setting module, a temperature synchronization controlling module and a PID controlling module are connected in sequence through signal wires; and the PID controlling module is connected with the electric heaters through signal wires. The system and the method can quickly control each section temperature to reach a set value simultaneously under circumstances that the temperatures of all the sections of the charging baskets of the injection moulding machine have different set values or the situations of heat dissipation are different. The system and the method can control each section of heater to work by obtaining the control output of each section after detecting errors between the temperature set value and the actual value of each section of charging basket in real time so as to realize the accurate temperature control to each section and achieve the effects of making the temperature of each section of charging basket of the injection moulding machine simultaneously and quickly reach the set temperature.
Description
Technical field
The present invention relates to the control device and the control method of injection machine, more particularly, the present invention relates to each section charging basket temperature synchro system and control method thereof in the injection machine.
Background technology
Injection machine is that the macromolecule raw material are heated to the temperature that production needs through the charging basket of injection machine, becomes molten state, will be heated to the polymeric fluid of molten state then, by the processing equipment of screw of injection cooling forming in the mould.Injection-moulding plastic can be realized one-shot forming to complex-shaped goods, have characteristics such as efficient height, accurate, the suitable production in enormous quantities of size, be that the tool advantage of plastic products also is topmost processing mode, have a wide range of applications in fields such as national economy and national defense industry.
The most important process conditions of injection mo(u)lding are temperature, injection precision, pressure and flow-controls etc. that the influence plasticizing is flowed and cooled off.Wherein the control of the charging basket temperature of injection machine is the pass key control technological parameter in the injection moulding processing technology, is directly connected to the performance of injection machine and the quality of converted products.So its control is extremely important.The temperature control of injection machine charging basket generally adopts segmentation to control, and with the charging basket of whole injection machine, from the injection port to the charge door, continuous is divided into several sections, and controls respectively.Each section temperature generally is set to different values as required.General medium temperature is the highest, and two sides temperature is low slightly.Because the section charging basket of injection machine is actually a continuous integral body, just man-made division is several sections and carries out segmentation control, intercouple between each section charging basket temperature like this, temperature control between the adjacent segment influences each other, and the close coupling effect between this each section temperature makes it can't realize independently controlling.
Injection machine charging basket controlled target temperature has very big delay hysteresis characteristic in addition, postpones after the temperature control output just to have variations in temperature from several seconds to a few minutes, so have hysteresis characteristic.
The controlled target temperature of injection machine charging basket also has uncertainty.At first its model can't or be difficult to accurate identification, the injection machine of different type of machines in addition, and its charging basket volume size and shape are different, and its controlled target temperature is also different, so injection machine charging basket controlled target temperature is again a probabilistic object.In sum as can be known, injection machine charging basket controlled target temperature is a close coupling, large time delay and uncertain control object, and accurately control is very difficult for it.
Another aspect, needs according to actual Shooting Technique, the setting value of each section charging basket temperature is different, and each section charging basket temperature unanimity before the injection machine start, all equal room temperature, the departure of each section is just inconsistent like this, the time that conventional each section of control method charging basket temperature reaches setting value is different, and injection machine must wait for that each section temperature all reaches setting value and just can work later, so reach the charging basket section of design temperature earlier, reach the charging basket section of design temperature after must waiting for, make all charging basket sections all reach design temperature and just can carry out work later on, wasted the time so greatly, and owing to exist the close coupling effect between each section temperature, reach the section of setting value earlier and the section that also do not reach between interaction can badly influence separately control accuracy and response time, so precise injection molding requires each section temperature can realize Synchronization Control, even inconsistent also requirement of each section setting value reaches setting value simultaneously, and response speed will be sought quickness.
Conventional injection machine charging basket temperature control algorithm is not all considered the requirement of Synchronization Control, so can't realize the Synchronization Control between each section temperature.The radiating condition of each section charging basket temperature is different in addition, reach after the design temperature, owing to constantly continuously produce, and the continuous adding of raw material and dispel the heat inconsistently, the temperature error that causes is also different, so also there is the problem of a Synchronization Control.The present invention is exactly in order to address this problem, and makes each section charging basket temperature reach the temperature of setting simultaneously, fast.
Summary of the invention
Main purpose of the present invention is to overcome the deficiencies in the prior art, proposes each section charging basket temperature synchro system in a kind of injection machine.Further object of the present invention provides a kind of injection machine charging basket temperature synchronisation control means based on this injection machine charging basket temperature synchronous control system.
The technical scheme that technical solution problem of the present invention adopts is as follows:
The invention provides a kind of injection machine charging basket temperature synchronous control system, comprise some electric heaters that are positioned at each fragment position place of charging basket and temperature sensor with corresponding installation site, each temperature sensor is connected to the temperature setting module by holding wire, temperature setting module, temperature synchronization control module are connected by holding wire successively with pid control module, and pid control module is connected to aforementioned each electric heater by holding wire.
As a kind of improvement, the quantity of described pid control module and electric heater is corresponding, and connects by holding wire respectively.
The present invention also provides a kind of temperature synchronisation control means based on aforementioned injection machine charging basket temperature synchronous control system, may further comprise the steps:
(1) gathers each section charging basket current actual temperature value in real time by temperature sensor, be sent to the temperature setting module;
(2) the built-in calculation procedure of temperature setting module obtains temperature departure value E between the adjacent charging basket of each section according to formula (a)
i, and be sent to the temperature synchronization control module;
E
i＝S
i-T
i (a)
Wherein i is the label of i section charging basket, E
iBe i section charging basket Current Temperatures departure value, S
iBe the design temperature of i section charging basket, T
iIt is the current actual samples temperature of i section charging basket;
(3) the built-in calculation procedure of temperature synchronization control module, the PID that obtains current each section charging basket electric heater according to formula (b) mixes control input value E '
i, and be sent to pid control module:
E′
i＝f
1(E
i，ΔE
i，i-1，ΔE
i，i+1)＝E
i+α·ΔE
i，i-1+β·ΔE
i，i+1 (b)
E ' wherein
iThe PID that is the i section mixes the control input value; Δ E
I, i-1=E
i-E
I-1, be the poor of current departure value of i section charging basket temperature and the current departure value of i-1 section charging basket; Δ E
I, i+1=E
i-E
I+1Be the poor of current departure value of i section charging basket temperature and the current departure value of i+1 section charging basket;
For first section charging basket, there is not Δ E
I, i-1; For the final stage charging basket, there is not Δ E
I, i+1;
In the formula, α, β is a positive coefficient, is called the coupled synchronization proportionality coefficient between the adjacent segment, determines that according to the stiffness of coupling between i section charging basket temperature and i-1 section, the i+1 section charging basket temperature its scope is [0,1]; Stiffness of coupling is high more between the adjacent segment charging basket temperature, α, and β numerical value is big more, and stiffness of coupling is more little, α, β numerical value is more little; α, the definite of β numerical value can obtain according to following experiment in actual applications: the heater of opening i-1 section charging basket makes its work, until its temperature is risen till 10 ℃, the heater of other sections all cuts out, note i section charging basket temperature rising numerical value in this process, if be x ℃, parameter alpha=x/10 then; Determining of parameter beta is also similar, closes the heater of other sections charging basket temperature, and the heater of opening i+1 section charging basket makes its work, up to i+1 section charging basket temperature is risen till 10 ℃, note the numerical value that i section charging basket temperature rises in this process, be assumed to be y ℃, then β=y/10;
(4) the built-in calculation procedure of pid control module obtains the control output valve of each section charging basket electric heater according to formula (c), and is sent to corresponding electric heater:
U wherein
iBe i section charging basket temperature control output valve, K
p, K
i, K
dBe pid control parameter, in the working control process, adopt general Ziegler-Nichols method to adjust.The Ziegler-Nichols method is based on the PID setting method of system stability analysis. and need not to consider any characteristic requirement in design process, setting method is very simple, but the control effect is more satisfactory, and concrete setting method is as follows:
At first, put K
i=K
d=0, increase proportionality coefficient then until system's starting oscillation (limit of closed-loop system is on J ω axle); Again this proportionality coefficient be multiply by 0.6, other parameters are calculated according to following formula:
K
p＝0.6*Km，K
d＝K
p*π/4*ω，K
i＝K
p*ω/π。Ratio value when wherein Km is system's starting oscillation; Frequency when ω is vibration;
(5) repeat the process of abovementioned steps (1) to step (4).
Compared with prior art, the invention has the beneficial effects as follows: each section of injection machine charging basket temperature be provided with inconsistent or the inconsistent situation of heat radiation situation under, control apace and make each section temperature reach setting value simultaneously.After the real-time error that detects between each section charging basket desired temperature and the actual value, obtain the control output of each section, go to control the work of the heater of each section, realize that the temperature of each section is accurately controlled.Adopt the present invention, can reach the effect that makes each section of injection machine charging basket temperature reach design temperature synchronously, fast.
Description of drawings
Fig. 1 is the schematic flow sheet that control method of the present invention realizes;
Fig. 2 is a temperature Synchronization Control schematic flow sheet among the present invention;
Fig. 3 is the structured flowchart of the embodiment of the invention.
The specific embodiment
Present embodiment is controlled to be the extremely realization of control method of injection machine charging basket temperature synchronous control system among example explanation the present invention with one three sections injection machine charging basket temperature, the injection machine charging basket temperature Synchronization Control of other multistages similarly all is deemed to be within the scope of the present invention.
Injection machine charging basket temperature synchronous control system structure in the present embodiment as shown in Figure 3, charging basket 319 is divided into three sections of I, II, III.First section and second section direct neighbor in the charging basket 319, the 3rd section and second section direct neighbor, second simultaneously and first, the 3rd section adjacent.The present invention only consider direct neighbor the section between coupling, ignore non-direct neighbor the section between coupling, like this by calculating each section the mixing input quantity time, first, the 3rd section is had only two, second section has three.
Synchronous control system comprises electric heater 318 that is positioned at charging basket 319 each fragment position place and the temperature sensor with corresponding installation site, and temperature sensor adopts K type thermocouple.Each temperature sensor is connected to corresponding temperature setting module 301,302,303 by holding wire, temperature setting module 301,302,303 is connected with pid control module 317 with temperature synchronization control module 316 successively by holding wire respectively, and pid control module 317 is connected to aforementioned electric heater 318 by holding wire.
Molding machine charging basket temperature synchronisation control means among the present invention may further comprise the steps:
(1) gathers the current actual samples temperature value of charging basket 319 each sections in real time by temperature sensor, be sent to temperature setting module 301,302,303 respectively;
(2) temperature setting module 301,302,303 all built-in calculation procedures obtain temperature departure value E according to formula (a)
i, and be sent to temperature synchronization control module 316;
E
i＝S
i-T
i (a)
Wherein i is the label of i section charging basket, E
iBe i section charging basket Current Temperatures departure value, S
iBe the design temperature of i section charging basket, T
iIt is the current actual samples temperature of i section charging basket;
In the present embodiment, the temperature of charging basket 319 each sections detects through K type thermocouple, and transform the actual temperature that obtains through AD and be respectively: 313 is first section actual temperature T
1, 314 is second section actual temperature T
2, 315 is the 3rd section actual temperature T
3The setting value of 319 3 sections temperature of charging basket is respectively: temperature setting module 301 is first section desired temperature S
1, temperature setting module 302 is second section desired temperature S
2, temperature setting module 303 is the 3rd section desired temperature S
3
First section setting value S
1Deduct first section actual value T
1Obtain first section departure 304, be E
1Second section setting value S
2Deduct second section actual value T
2Get second section departure to 305, be E
2, the 3rd section setting value S
3Deduct the 3rd section actual value T
3Obtain the 3rd section departure 306, be E
3
(3) temperature synchronization control module 316 built-in calculation procedures, the PID that obtains current charging basket 319 each section electric heaters 318 according to formula (b) mixes control input value E '
i, and be sent to pid control module 317:
E′
i＝f
1(E
i，ΔE
i，i-1，ΔE
i，i+1)＝E
i+α·ΔE
i，i-1+β·ΔE
i，i+1 (b)
E ' wherein
iThe PID that is the i section mixes the control input value; Δ E
I, i-1=E
i-E
I-1, be the poor of current departure value of i section charging basket temperature and the current departure value of i-1 section charging basket; Δ E
I, i+1=E
i-E
I+1Be the poor of current departure value of i section charging basket temperature and the current departure value of i+1 section charging basket;
For first section charging basket, there is not Δ E
I, i-1; For the final stage charging basket, there is not Δ E
I, i+1;
In the formula, α, β is a positive coefficient, is called the coupled synchronization proportionality coefficient between the adjacent segment, determines according to the stiffness of coupling between i section charging basket temperature and i-1 section, the i+1 section charging basket temperature; Its scope is [0,1], and stiffness of coupling is high more between the adjacent segment charging basket temperature, and numerical value is big more, and stiffness of coupling is more little, and numerical value is more little.The definite of its numerical value can obtain according to following experiment in actual applications: the heater of opening i-1 section charging basket makes its work, until its temperature is risen till 10 ℃, the heater of other sections all cuts out, note i section charging basket temperature rising numerical value in this process, if be x ℃, parameter alpha=x/10 then; Determining of parameter beta is also similar, closes the heater of other sections charging basket temperature, and the heater of opening i+1 section charging basket makes its work, up to i+1 section charging basket temperature is risen till 10 ℃, note the numerical value that i section charging basket temperature rises in this process, be assumed to be y ℃, then β=y/10.
In the present embodiment, 319 3 sections departure E of charging basket own
1, E
2, E
3Be sent to temperature synchronization control module 316 back and calculate difference between each section charging basket temperature departure by the module plug-in.For first section, Δ E
1,2=E
1-E
2For second section, Δ E
2,1=E
2-E
1, Δ E
2,3=E
2-E
3For the 3rd section, Δ E
3,2=E
3-E
2
According to formula (b), for first section, E '
1=E
1+ β Δ E
1,2For second section, E '
2=E
2+ α Δ E
2,1+ β Δ E
2,3For the 3rd section, E '
3=E
3+ α Δ E
3,2Wherein the numerical value of α, β is determined according to the stiffness of coupling between each section, for three sections charging basket temperature controls of this enforcement, adopts said method to test, and obtains data computation and obtains α=β=0.5.Obtain mixing being illustrated as in the input respective figure 3 by this step: 307 for mixing input E '
1, 308 for mixing input E '
2, 309 for mixing input E '
3
(4) the built-in calculation procedure of pid control module, according to formula (c) obtain each section charging basket electric heater the control output valve, and be sent to corresponding electric heater:
U wherein
iBe i section charging basket temperature control output valve, K
p, K
i, K
dBe pid control parameter.According to the mixing input E ' that obtains
1, E '
2, E '
3, the K of PID controller is exported in the control that utilizes pid control algorithm to calculate three sections respectively
p, K
i, k
dParameter adopts the Ziegler-Nichols method of introducing in the foregoing invention content to adjust according to actual conditions.Obtain as 310 be that U is exported in first section charging basket temperature control in the accompanying drawing 3
1, 311 is second section charging basket temperature control output U
2, 312 is the 3rd section charging basket temperature control output U
3, according to U
1, U
2, U
3The work of the heater 318 that control is corresponding, and then three sections charging basket temperature of control charging basket 319.
Repeat the process of abovementioned steps (1) when (5) next control cycle reaches, realize Sustainable Control to step (4).
Need to prove that wherein actual temperature is continuous continuous sampling data, every error and control output and control all are constantly to realize calculating and controlling output according to the control cycle of setting, and the control cycle in the present embodiment is 10 seconds.
It should be understood that; the present invention is not limited to the definite structure that as above illustrates and describe; in the defined the spirit and scope of the present invention of the claim that does not deviate from, can carry out various change and modification to invention, all be considered to protection scope of the present invention.
Claims (3)
1, a kind of injection machine charging basket temperature synchronous control system, comprise some electric heaters that are positioned at each fragment position place of charging basket and temperature sensor with corresponding installation site, it is characterized in that, each temperature sensor is connected to the temperature setting module by holding wire, temperature setting module, temperature synchronization control module are connected by holding wire successively with pid control module, and pid control module is connected to aforementioned each electric heater by holding wire.
2, injection machine charging basket temperature synchronous control system according to claim 1 is characterized in that the quantity of described pid control module and electric heater is corresponding, and connects by holding wire respectively.
3, a kind of injection machine charging basket temperature synchronisation control means based on the described injection machine charging basket of claim 1 temperature synchronous control system is characterized in that, may further comprise the steps:
(1) gathers the current actual samples temperature value of each section charging basket in real time by temperature sensor, be sent to the temperature setting module;
(2) the built-in calculation procedure of temperature setting module obtains temperature departure value E between the adjacent charging basket of each section according to formula (a)
i, and be sent to the temperature synchronization control module;
E
i＝S
i-T
i (a)
Wherein i is the label of i section charging basket, E
iBe i section charging basket Current Temperatures departure value, S
iBe the design temperature of i section charging basket, T
iIt is the current actual samples temperature of i section charging basket;
(3) the built-in calculation procedure of temperature synchronization control module, the PID that obtains current each section charging basket electric heater according to formula (b) mixes control input value E '
i, and be sent to pid control module:
E′
i＝f
1(E
i，ΔE
i，i-1，ΔE
i，i+1)＝E
i+α·ΔE
i，i-1+β·ΔE
i，i+1 (b)
E ' wherein
iThe PID that is the i section mixes the control input value; Δ E
I, i-1=E
i-E
I-1, be the poor of current departure value of i section charging basket temperature and the current departure value of i-1 section charging basket; Δ E
I, i+1=E
i-E
I+1Be the poor of current departure value of i section charging basket temperature and the current departure value of i+1 section charging basket;
For first section charging basket, there is not Δ E
I, i-1; For the final stage charging basket, there is not Δ E
I, i+1;
In the formula, α, β is a positive coefficient, is called the coupled synchronization proportionality coefficient between the adjacent segment, determines that according to the stiffness of coupling between i section charging basket temperature and i-1 section, the i+1 section charging basket temperature its scope is [0,1];
(4) the built-in calculation procedure of pid control module, according to formula (c) obtain each section charging basket electric heater the control output valve, and be sent to corresponding electric heater:
U wherein
iBe i section charging basket temperature control output valve, K
p, K
i, K
dBe pid control parameter;
(5) repeat the process of abovementioned steps (1) to step (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910095350XA CN101491935B (en) | 2009-01-08 | 2009-01-08 | Charging-basket temperature synchronous control system and method of injection-molding device machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910095350XA CN101491935B (en) | 2009-01-08 | 2009-01-08 | Charging-basket temperature synchronous control system and method of injection-molding device machine |
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| Publication Number | Publication Date |
|---|---|
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| CN101491935B CN101491935B (en) | 2011-02-02 |
Family
ID=40922809
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|---|---|---|---|
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010111936A1 (en) | 2009-03-30 | 2010-10-07 | Lou Zhengrong | Hopper for injection molding machine |
| CN102129221A (en) * | 2010-01-15 | 2011-07-20 | 丹纳赫西特传感工业控制（天津）有限公司 | Fuzzy control-based special PID (Proportion Integration Differentiation) method for controlling temperature of plastic extrusion device |
| CN102398356A (en) * | 2011-12-06 | 2012-04-04 | 浙江大学 | Temperature control method and system for a plurality of sections of barrel of injection molding machine |
| CN102501358A (en) * | 2011-10-21 | 2012-06-20 | 宁波安信数控技术有限公司 | Heating control system of injection molding machine |
| CN102661663A (en) * | 2012-04-26 | 2012-09-12 | 苏州市金翔钛设备有限公司 | High-temperature heating equipment |
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| US8844155B2 (en) | 2009-03-30 | 2014-09-30 | Zhengrong LOU | Hopper of injection molding machine |
| WO2010111936A1 (en) | 2009-03-30 | 2010-10-07 | Lou Zhengrong | Hopper for injection molding machine |
| CN102129221A (en) * | 2010-01-15 | 2011-07-20 | 丹纳赫西特传感工业控制（天津）有限公司 | Fuzzy control-based special PID (Proportion Integration Differentiation) method for controlling temperature of plastic extrusion device |
| CN102501358A (en) * | 2011-10-21 | 2012-06-20 | 宁波安信数控技术有限公司 | Heating control system of injection molding machine |
| CN102398356A (en) * | 2011-12-06 | 2012-04-04 | 浙江大学 | Temperature control method and system for a plurality of sections of barrel of injection molding machine |
| CN102398356B (en) * | 2011-12-06 | 2013-10-30 | 浙江大学 | Temperature control method and system for plurality of sections of barrel of injection molding machine |
| CN102661663A (en) * | 2012-04-26 | 2012-09-12 | 苏州市金翔钛设备有限公司 | High-temperature heating equipment |
| CN102744845B (en) * | 2012-07-04 | 2014-12-10 | 宁波巴斯顿机械科技有限公司 | High-precision injection moulding machine for optical-grade transparent product |
| CN102744845A (en) * | 2012-07-04 | 2012-10-24 | 宁波巴斯顿机械科技有限公司 | High-precision injection moulding machine for optical-grade transparent product |
| CN104070653A (en) * | 2013-03-26 | 2014-10-01 | 住友重机械工业株式会社 | Injection molding machine |
| CN104070653B (en) * | 2013-03-26 | 2017-04-12 | 住友重机械工业株式会社 | Injection molding machine |
| CN111152433A (en) * | 2020-01-16 | 2020-05-15 | 宁波伊士通控制技术有限公司 | Temperature control method for charging barrel of precision injection molding machine |
| CN111152433B (en) * | 2020-01-16 | 2021-08-06 | 宁波伊士通控制技术有限公司 | Temperature control method for charging barrel of precision injection molding machine |
| CN113211750A (en) * | 2021-04-25 | 2021-08-06 | 广东工业大学 | Udf and numerical simulation-based temperature control method for metering section of charging barrel of injection molding machine |
| CN113211750B (en) * | 2021-04-25 | 2023-02-17 | 广东工业大学 | Injection molding machine charging barrel metering section temperature control method based on udf and numerical simulation |
| CN113778147A (en) * | 2021-07-23 | 2021-12-10 | 海天塑机集团有限公司 | Method and system for restraining current fluctuation by controlling current output |
| CN113778147B (en) * | 2021-07-23 | 2022-05-17 | 海天塑机集团有限公司 | Method and system for restraining current fluctuation by controlling current output |
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| CN101491935B (en) | 2011-02-02 |
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Application publication date: 20090729 Assignee: NINGBO LOG MACHINERY CO., LTD. Assignor: Zhejiang University Contract record no.: 2011330000574 Denomination of invention: Charging-basket temperature synchronous control system and method of injection-molding device machine Granted publication date: 20110202 License type: Exclusive License Record date: 20110523 |
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