CN103358510B - Control apparatus of injection molding machine with function of adjusting pressure control parameters - Google Patents
Control apparatus of injection molding machine with function of adjusting pressure control parameters Download PDFInfo
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- CN103358510B CN103358510B CN201310109176.6A CN201310109176A CN103358510B CN 103358510 B CN103358510 B CN 103358510B CN 201310109176 A CN201310109176 A CN 201310109176A CN 103358510 B CN103358510 B CN 103358510B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/5032—Drive means therefor using means for detecting injection or back pressures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/76036—Frequency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76177—Location of measurement
- B29C2945/7618—Injection unit
- B29C2945/76214—Injection unit drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76344—Phase or stage of measurement
- B29C2945/76367—Metering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76344—Phase or stage of measurement
- B29C2945/76381—Injection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76929—Controlling method
- B29C2945/76936—The operating conditions are corrected in the next phase or cycle
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention provides a control apparatus of an injection molding machine with a function of adjusting pressure control parameters. The control apparatus of the injection molding machine has a pressure control part which drives a movable part to perform pressure control according to the pressure control parameters. The control apparatus adjusts the pressure control parameters (pressure control gain, pressure control filter coefficient), so as to enable a closed-loop frequency characteristic measured in a pressure control process to be approximately consistent with a predetermined reference closed-loop frequency characteristic.
Description
Technical field
The present invention relates to the adjustment of the pressure controling parameter in the Stress control ring of injection moulding machine.
Background technology
In the Stress control of injection moulding machine, generally knownly make screw rod at direction of principal axis forward-reverse to its pressure of resin pressurized control as control object.The response of known resin pressure when now making screw rod forward-reverse is different according to the kind of resin or characteristic.Such as in Japanese Unexamined Patent Publication 2011-251301 publication, disclose such technology: do not carry out the Stress control by pressure control portion, carry out the action of the change in location of the mechanical load made pressurization object, according to the multiple data be made up of position signalling and pressure signal, identify the elastic constant of above-mentioned pressurization object, according to the elastic constant calculating pressure controling parameters of this identification.
But, in above-mentioned Japanese Unexamined Patent Publication 2011-251301 publication, be but the static constant identifying that the elastic constant of pressurization object is such, existence is difficult to calculating makes the response speed of the pressure of each control frequency band (frequency) become the problem of best pressure parameter.Therefore, on the contrary exist become higher than appropriate value according to control frequency band gain values, control pressurer system becomes unstable or yield value becomes lower than appropriate value, Stress control response slows up such problem.
Summary of the invention
In view of the problem of above-mentioned prior art, the object of the present invention is to provide a kind of control device with the injection moulding machine of the function of adjustment pressure controling parameter, it adjusts according to the kind of resin or characteristic, make to become suitable pressure controling parameter, can with control frequency band independently or independently obtain suitable Stress control with the kind of resin or characteristic and respond.
The control device of injection moulding machine of the present invention, have pressure detecting portion, movable part position detection part and according to pressure controling parameter drive movable part carry out pressure controlled pressure control portion.
The first method of the control device of this injection moulding machine, has: the dynamic response computation portion measuring the closed loop frequency characteristics of above-mentioned pressure control portion; The reference frequency characteristic storage part of Memory Reference closed loop frequency characteristics; And parameter adjustment unit, for adjusting above-mentioned pressure controling parameter, the closed loop frequency characteristics that said frequencies characteristic measurement portion is measured in Stress control operation is unanimous on the whole with the benchmark closed loop frequency characteristics stored in said reference frequency characteristic storage part.
The second method of the control device of this injection moulding machine, has: the dynamic response computation portion measuring the closed loop frequency characteristics of above-mentioned pressure control portion; And parameter adjustment unit, for adjusting above-mentioned pressure controling parameter, gain margin or the phase margin of the closed loop frequency characteristics that said frequencies characteristic measurement portion is measured in Stress control operation are consistent with predetermined a reference value.
The Third Way of the control device of this injection moulding machine, has: the response determination part measuring at least one in the step response of above-mentioned pressure control portion or impulse response; And parameter adjustment unit, for adjusting above-mentioned pressure controling parameter, the step response that above-mentioned response determination part is measured in Stress control operation or the stabilization time of impulse response consistent with predetermined a reference value.
The fourth way of the control device of this injection moulding machine, has: the dynamic response computation portion measuring open loop frequency characteristic when pressurizeing to the resin as control object; And parameter adjustment unit, the response for the open loop frequency characteristic measured in the position control or Stress control operation of above-mentioned movable part according to said determination portion adjusts above-mentioned pressure controling parameter.
According to the present invention, the control device of injection moulding machine of the function with adjustment pressure controling parameter can be provided, its can with control frequency band independently or independently obtain suitable Stress control with the kind of resin or characteristic and respond.
Accompanying drawing explanation
Fig. 1 is the summary construction diagram of injection moulding machine and the control device controlling this injection moulding machine.
Fig. 2 is the key diagram that pressure controlled closed loop frequency characteristics measures.
Fig. 3 is the key diagram of the open loop frequency characteristic measurement of resin.
Fig. 4 is the flow chart of the process of the adjustment of the pressure controling parameter that embodiments of the present invention 1 are described.
Fig. 5 is the flow chart of the process of the adjustment of the pressure controling parameter that embodiments of the present invention 2 are described.
Fig. 6 is the flow chart of the process of the adjustment of the pressure controling parameter that embodiments of the present invention 3 are described.
Fig. 7 is the flow chart of the process of the adjustment of the pressure controling parameter that embodiments of the present invention 4 are described.
Detailed description of the invention
Use Fig. 1 that injection moulding machine is described and control the schematic configuration of control device of this injection moulding machine.
In the front end of cylinder 1, nozzle 2 is installed, in the rearward end of cylinder 1, the hopper 4 supplying resin particle to cylinder 1 is installed.Screw rod 3 is inserted in cylinder 1, drive this screw rod 3 in axial direction by the driver element (mapping devices 8 rotary motion being transformed to rectilinear motion of injection servomotor M1, transmission mechanism 7 and ball-screw/nut etc.) of the direction of principal axis drive screw 3 at screw rod 3, carry out injecting and back pressure control.In addition, by rotary drive unit (transmission mechanism 6 be made up of servomotor M2 and belt, belt wheel etc.) the rotary actuation screw rod 3 for making screw rod 3 rotate.
At injection servomotor M1 and screw rod rotation the location/velocity detector Penc1, the location/velocity detector Penc2 that servomotor M2 install respectively the position of rotation/speed detecting them.The position (the axial position of screw rod) of screw rod 3, the rotary speed of translational speed (injection speed), screw rod 3 can be detected by these location/velocity detectors Penc1, Penc2.In addition, the pressure sensor 5 of the force cell of the axial pressure of the screw rod from molten resin detecting applying on screw rod 3 etc. is set.
The ROM18 that PMC CPU17 connects the sequencer program etc. storing the sequence action controlling injection moulding machine and the RAM19 used in the interim storage etc. of operational data.On CNC CPU20, connect and store the overall ROM21 controlling the automatic running program of injection moulding machine etc. and the RAM22 used in the interim storage etc. of operational data.
On servo CPU15, connect and be stored into line position ring, speed ring, the ROM13 of the special control program of the SERVO CONTROL of process of electric current loop and the RAM14 that uses in the interim storage of data.On servo CPU15, also connect the servo amplifier 12 according to the order-driven screw rod rotation servomotor M2 from servo CPU15 and the servo amplifier 11 driving injection servomotor M1.
On each servomotor M1, M2, as above-mentioned, installation site/speed detector Penc1, Penc2 respectively.Output from these location/velocity detectors Penc1, Penc2 is fed back to servo CPU15.Servo CPU15, according to the move indicated from CNC CPU20 to each axle (injection servomotor M1, screw rod rotation servomotor M2) and from location/velocity detector Penc1, location/velocity detector Penc2 feedback detection position and detect speed, carry out the FEEDBACK CONTROL of location/velocity, and then also perform Current Feedback Control, each servo amplifier 11,12 of drived control.
In addition, the position feed back signal be arranged through from location/velocity detector Penc1 obtains the current location register of the progressive position (direction of principal axis position) of screw rod 3, can detect screw position by this current location register.In addition, to servo CPU15 input A/D converter 16, the detection signal of pressure sensor 5 is transformed to the resin pressure (resin pressure applied on screw rod) of data signal.
The input unit 25 with the band display unit of the display unit formed with liquid crystal indicator etc. is connected with bus 26 via display circuit 24.Further, be also connected with bus 26 with RAM23 with the forming data preservation that nonvolatile memory is formed.The condition of molding about injection mo(u)lding operation and various setting value, parameter, macro-variable etc. are stored in this forming data preservation RAM23.
By above structure, PMC CPU17 controls the sequence action of injection moulding machine entirety, CNCCPU20, according to the working procedure of ROM21, the condition of molding etc. that stores in forming data preservation RAM23, carries out the distribution of move to servomotor M1, M2 of each axle.Servo CPU15, according to the feedback signal etc. of the move distributed each axle (injection servomotor M1, screw rod rotation servomotor M2) and the position detected by location/velocity detector Penc1, Penc2 and speed, carry out position ring control in the same manner as prior art, speed ring controls and the SERVO CONTROL of current loop control, perform so-called digital servo process.
In the forming action operation of injection moulding machine, divide roughly, have and close the matched moulds operation that metal pattern carries out locked mode; Screw rod is made to advance to the injection process of injection molding process molten resin in metal pattern; After filling molten resin in metal pattern, control the pressurize operation of the pressure of the resin in metal pattern; The refrigerating work procedure of the resin in cool metal mould; While applying back pressure to screw rod, screw rod is rotated and make resin melting, measure the measurement operation of the resin after this melting; Open the die sinking operation of metal pattern; With in metal pattern, release products formed and the release operation (ejecting operation) etc. of taking out.In addition, general in above-mentioned injection process and pressurize operation, extensive employing carries out screw position/speeds control arrive predetermined screw position from the starting of injection before, after arriving predetermined screw position (injection/pressurize switching position), be switched to Stress control to carry out the control method of pressurize.
The following describes the function of adjustment pressure controling parameter of the present invention, this function can become suitable pressure controling parameter according to the kind of resin or characteristic adjustment, with control frequency band independently, in addition and the kind of resin or characteristic independently obtain suitable Stress control and respond.
(about frequency characteristic)
By in the pressure controlled drived control of movable part, in order to control frequency band independently, in addition and the kind of resin or characteristic independently obtain suitable Stress control and respond, first measure frequency characteristic.As the frequency characteristic that should measure, open loop frequency characteristic when comprising pressure controlled closed loop frequency characteristics and resin is pressurizeed.
In the mensuration of pressure controlled closed loop frequency characteristics, there is (a) interfering signal of overlapping sinusoidal waveform in the command value of Stress control ring, scan frequency simultaneously, obtain the method for the response of the interfering signal to this overlap, or (b) overlapping white noise in the command value of Stress control ring, obtains the method etc. of the response of the white noise to this overlap.These methods are all known.
In pressure controlled closed loop frequency characteristics measures, as shown in Figure 2, input pressure instruction, the frequency of overlapping interfering signal sweeping interfering signal simultaneously on this pressure instruction.Then, the pressure exported as the response of the interfering signal to this overlap detects value, obtains the transfer function (i.e. pressure controlled closed loop frequency characteristics) of input and output.
In addition, in the mensuration of the open loop frequency characteristic when pressurizeing to resin, in order to become sinusoidal waveform variation for the resin as control object as the position of the movable part of input, there is (a) interfering signal scan frequency simultaneously of overlapping sinusoidal waveform in the command value of position control loop or Stress control ring, measure the method for the variation as the pressure exported, or (b) for making the position as the movable part of input become the variation of white noise shape, and in the command value of position control loop or Stress control ring overlapping white noise, measure the method etc. of the variation as the pressure exported.These methods are all known.
In the mensuration of the open loop frequency characteristic of resin, as shown in Figure 3, using screw position as input, the frequency of overlapping interfering signal sweeping interfering signal simultaneously on pressure instruction.Then, using the response of the variation to screw position and detected pressure value as output, the transfer function (the open loop frequency characteristic namely when pressurizeing to resin) of input and output is obtained.In addition, above to making screw position change in pressure control procedure, the situation measuring the open loop frequency characteristic of resin is illustrated, but also can in (not being pressure control procedure) position control process, screw position be changed, and measures the open loop frequency characteristic of resin.
(kind about movable part)
In the adjustment of pressure controling parameter of the present invention, movable part, can be carry out pressure controlled screw rod forward-reverse axle by the action of screw rod forward-reverse, also can be the pressure controlled backing-out punch axle being carried out metal mould cavity part by the action of backing-out punch core, also can be the pressure controlled mould folding axle being carried out metal mould cavity part by the compressed action of mould.
(about Stress control operation, position control operation)
Stress control operation for measuring frequency characteristic or position control operation are described.
(a) when movable part is the forward-reverse axle of screw rod, as Stress control operation, can as the operation of the pressurize in molding cycle, measurement etc., also can as with pressure controlled ongoing cleaning action.On the other hand, as position control operation, can as the operation of the injection in molding cycle, decompression etc., the ongoing cleaning action that also can control as adjoint screw position.B (), when movable part is backing-out punch axle, as Stress control operation or position control operation, also can be the backing-out punch compression section in molding cycle.C (), when movable part is mould folding axle, as Stress control operation or position control operation, also can be the mould compression section in molding cycle.D (), under movable part is any one situation of screw rod forward-reverse axle, backing-out punch axle, mould folding axle, as Stress control operation or position control operation, can arrange the mensuration operation of frequency characteristic in the idle period of time of molding cycle.
Several embodiments of the process of the adjustment of pressure controling parameter of the present invention are below described.
< embodiment 1>
In Stress control operation, measure the closed loop frequency characteristics of pressure control portion (Stress control ring), adjustment pressure controling parameter, the closed loop frequency characteristics making this mensuration is unanimous on the whole with the closed loop frequency characteristics becoming benchmark.About the above-mentioned closed loop frequency characteristics becoming benchmark, prestore the closed loop frequency characteristics during resin forming making normal response, its value is used as " becoming the closed loop frequency characteristics of benchmark ".
In above-mentioned controlled pressure controling parameter, comprise centre frequency, bandwidth, the damped coefficient of band limitation filter of the proportional gain of Stress control ring, storage gain, the differential gain, the cut-off frequency of low pass filter of control pressurer system, damped coefficient, control pressurer system.
For the judgement whether closed loop frequency characteristics becoming benchmark is unanimous on the whole with the closed loop frequency characteristics determined, such as, least square method also can be used to carry out.Specifically, calculate the mean square deviation of the gain characteristic of the gain characteristic becoming the closed loop frequency characteristics of benchmark and the closed loop frequency characteristics determined, carry out judgement whether unanimous on the whole according to whether mean square deviation is less than predetermined value, also can adjust pressure controling parameter and make mean square deviation become minimum.
The adjustment of pressure controling parameter, such as also can relative to the closed loop frequency characteristics becoming benchmark, when the response of the closed loop frequency characteristics determined is low, increase the proportional gain of Stress control ring, storage gain, the differential gain, response is increased, on the other hand, relative to the closed loop frequency characteristics becoming benchmark, when the response of the closed loop frequency characteristics determined is high, reduces the proportional gain of Stress control ring, storage gain, the differential gain, response is reduced.In addition, in frequency characteristic, in the specific frequency band of the closed loop frequency characteristics determined, when inconsistent with the closed loop characteristic becoming benchmark because resonance waits, also can adjust centre frequency, bandwidth, the damped coefficient in the band limitation filter of the cut-off frequency of the low pass filter of control pressurer system, damped coefficient, control pressurer system, eliminate the inconsistent of the characteristic caused by resonance etc.
< embodiment 2>
In Stress control operation, measure the closed loop frequency characteristics of Stress control ring, adjustment pressure controling parameter, gain margin or the phase margin of the closed loop frequency characteristics making this determine are consistent with a reference value.Above-mentioned gain margin or phase margin, can preset suitable value for each machine, also can be set by operator according to the characteristic of products formed.Such as light guide plate etc. is required to the products formed of high responsiveness, gain margin or phase margin can be reduced to improve Stress control response, optical lens etc. is more required compared with response to the products formed of stability, gain margin or phase margin can be increased to pay attention to stability.
< embodiment 3>
In Stress control operation, measure step response or the impulse response of Stress control ring, adjustment pressure controling parameter, the step response making this determine or the stabilization time of impulse response consistent with a reference value.The a reference value of aforementioned stable time, can preset suitable a reference value for each machine, also can set a reference value according to the characteristic of products formed by operator.Such as light guide plate etc. is required to the products formed of high responsiveness, a reference value can be reduced to improve Stress control response, optical lens etc. more be required compared with response to the products formed of stability, a reference value can be increased to pay attention to stability.
< embodiment 4>
In the position control or Stress control operation of movable part, measure the open loop frequency characteristic when resin as control object is pressurizeed, according to the response adjustment pressure controling parameter of this open loop frequency characteristic determined.Here, so-called open loop frequency characteristic when resin pressurize, be for the resin as control object input the variation of the position of movable part, output pressure variation time input-output characteristic (transfer function).
Also for the high resin of the response of said frequencies characteristic, Stress control gain can be made to get low value, make Stress control gain get high value for the resin that response is low, independently obtain suitable Stress control with the kind of resin or characteristic and respond.In addition, also can for the high resin of the intrinsic frequency of above-mentioned open loop frequency characteristic, the cut-off frequency of low pass filter or the centre frequency of band limitation filter is made to get high frequency, for the resin that intrinsic frequency is low, make the cut-off frequency of low pass filter or the centre frequency of band limitation filter get low frequency, suppress the resonance caused by the intrinsic frequency of resin.
Use flow chart that the process of the adjustment of the pressure controling parameter of embodiments of the present invention 1-4 is described below.
Fig. 4 is the flow chart of the process of the adjustment of the pressure controling parameter that embodiments of the present invention 1 are described.Illustrate in accordance with each step below.
[step SA01] performs Stress control.
[step SA02] measures pressure controlled closed loop frequency characteristics.
[step SA03] judges that whether the closed loop frequency characteristics determined is consistent with predetermined datum characteristic, terminates this process, shift in the case of inconsistencies to step SA04 when consistent.
[step SA04] adjusts Stress control gain, Stress control filter coefficient, returns step SA01.
Fig. 5 is the flow chart of the process of the adjustment of the pressure controling parameter that embodiments of the present invention 2 are described.Illustrate in accordance with each step below.
[step SB01] performs Stress control.
[step SB02] measures pressure controlled closed loop frequency characteristics.
[step SB03] calculates the gain margin of the closed loop frequency characteristics determined.
[step SB04] judges that whether the gain margin calculated is consistent with predetermined a reference value, terminates this process, shift in the case of inconsistencies to step SB05 when consistent.
[step SB05] adjusts Stress control gain, Stress control filter coefficient, returns step SB01.
Fig. 6 is the flow chart of the process of the adjustment of the pressure controling parameter that embodiments of the present invention 3 are described.Illustrate in accordance with each step below.
[step SC01] performs Stress control.
[step SC02] measures pressure controlled step response.
[step SC03] calculates the stabilization time of the step response determined.
[step SC04] judges that whether the stabilization time calculated is consistent with predetermined a reference value, terminates this process, shift in the case of inconsistencies to step SC05 when consistent.
[step SC05] adjusts Stress control gain, Stress control filter coefficient, returns step SC01.
Fig. 7 is the flow chart of the process of the adjustment of the pressure controling parameter that embodiments of the present invention 4 are described.Illustrate in accordance with each step below.
[step SD01] performs screw position and controls or Stress control.
[step SD02] measures the open loop frequency characteristic of resin.
[step SD03] adjusts Stress control gain, Stress control filter coefficient according to the response of the resin determined, and terminates this process.
Claims (4)
1. the control device of an injection moulding machine, its have pressure detecting portion, movable part position detection part and according to pressure controling parameter drive movable part carry out pressure controlled pressure control portion, described movable part is screw rod forward-reverse axle, backing-out punch axle, or mould folding axle, it is characterized in that having:
Measure the dynamic response computation portion of the closed loop frequency characteristics of above-mentioned pressure control portion;
Store the reference frequency characteristic storage part becoming the closed loop frequency characteristics of benchmark,
The control device of above-mentioned injection moulding machine measures the closed loop frequency characteristics of pressure control portion in Stress control operation, and the closed loop frequency characteristics that said determination is gone out and the above-mentioned closed loop frequency characteristics becoming benchmark adjust above-mentioned pressure controling parameter unanimous on the wholely.
2. the control device of an injection moulding machine, its have pressure detecting portion, movable part position detection part and according to pressure controling parameter drive movable part carry out pressure controlled pressure control portion, described movable part is screw rod forward-reverse axle, backing-out punch axle, or mould folding axle, it is characterized in that having:
Measure the dynamic response computation portion of the closed loop frequency characteristics of above-mentioned pressure control portion,
The control device of above-mentioned injection moulding machine measures the closed loop frequency characteristics of pressure control portion in Stress control operation, and the gain margin of the closed loop frequency characteristics that said determination is gone out or phase margin and a reference value as one man adjust above-mentioned pressure controling parameter.
3. the control device of an injection moulding machine, its have pressure detecting portion, movable part position detection part and according to pressure controling parameter drive movable part carry out pressure controlled pressure control portion, described movable part is screw rod forward-reverse axle, backing-out punch axle, or mould folding axle, it is characterized in that having:
Measure the response determination part of at least one in the step response of above-mentioned pressure control portion or impulse response,
The control device of above-mentioned injection moulding machine measures at least one in the step response of pressure control portion or impulse response in Stress control operation, and the step response that said determination is gone out or impulse corresponding stabilization time and a reference value as one man adjust above-mentioned pressure controling parameter.
4. the control device of an injection moulding machine, its have pressure detecting portion, movable part position detection part and according to pressure controling parameter drive movable part carry out pressure controlled pressure control portion, described movable part is screw rod forward-reverse axle, backing-out punch axle, or the axle of mould folding, it is characterized in that having:
Measure the dynamic response computation portion of the open loop frequency characteristic when resin as control object is pressurizeed,
The control device of above-mentioned injection moulding machine measures the open loop frequency characteristic of resin in the position control or Stress control operation of described movable part, and the response according to the described open loop frequency characteristic determined adjusts above-mentioned pressure controling parameter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-077277 | 2012-03-29 | ||
| JP2012077277A JP5302437B1 (en) | 2012-03-29 | 2012-03-29 | Control device for injection molding machine having function of adjusting pressure control parameter |
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| Publication Number | Publication Date |
|---|---|
| CN103358510A CN103358510A (en) | 2013-10-23 |
| CN103358510B true CN103358510B (en) | 2015-04-01 |
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| CN201310109176.6A Active CN103358510B (en) | 2012-03-29 | 2013-03-29 | Control apparatus of injection molding machine with function of adjusting pressure control parameters |
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| Country | Link |
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| JP (1) | JP5302437B1 (en) |
| CN (1) | CN103358510B (en) |
| DE (1) | DE102013005078B4 (en) |
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| CN105984097B (en) * | 2015-02-13 | 2018-10-16 | 宁波弘讯科技股份有限公司 | A kind of injection molding machine technological parameter adjustment method and system |
| JP6325504B2 (en) * | 2015-10-28 | 2018-05-16 | ファナック株式会社 | Servo control device having a function of automatically adjusting a learning controller |
| DE102019120541A1 (en) * | 2019-07-30 | 2021-02-04 | Hamilton Medical Ag | System for regulating a ventilation variable of a ventilator, ventilator and method for regulating a ventilation variable of a ventilator |
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| CN1470375A (en) * | 2002-07-05 | 2004-01-28 | ��ǿ�ʽ | Electric injection moulding machine |
| JP2010111009A (en) * | 2008-11-06 | 2010-05-20 | Mitsubishi Electric Corp | Controller for injection molding machine, and the injection molding machine |
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| JP2011251301A (en) * | 2010-06-01 | 2011-12-15 | Mitsubishi Electric Corp | Device for controlling pressure |
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| CN1470375A (en) * | 2002-07-05 | 2004-01-28 | ��ǿ�ʽ | Electric injection moulding machine |
| JP2010111009A (en) * | 2008-11-06 | 2010-05-20 | Mitsubishi Electric Corp | Controller for injection molding machine, and the injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103358510A (en) | 2013-10-23 |
| DE102013005078B4 (en) | 2019-06-19 |
| JP2013203029A (en) | 2013-10-07 |
| JP5302437B1 (en) | 2013-10-02 |
| DE102013005078A1 (en) | 2013-10-02 |
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