CN108544724A - A kind of intelligence control system of injection molding machine injection process - Google Patents
A kind of intelligence control system of injection molding machine injection process Download PDFInfo
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- CN108544724A CN108544724A CN201810334203.2A CN201810334203A CN108544724A CN 108544724 A CN108544724 A CN 108544724A CN 201810334203 A CN201810334203 A CN 201810334203A CN 108544724 A CN108544724 A CN 108544724A
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- screw rod
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- molding machine
- injection molding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
Abstract
The present invention provides the intelligence control systems that a kind of injection molding machine injects process, including：Image acquisition device, central controller and screw driver；The image acquisition device is used to acquire the image of injected sample, and it is sent to central controller, the image of injected sample is carried out feature extraction by the central controller, by generating screw rod implementation strategy after analyzing characteristic, the signal input part of the screw driver is connect with central controller, the screw driver controls the operation of screw in injection molding machine using screw rod implementation strategy, and the screw rod implementation strategy includes：The setting for speed, time point and the stroke that screw rod advances in injection process day part, retreats.Using this system can realize screw rod process it is accurate, automatically control, and reach different control targes in conjunction with the different situations of actual production.
Description
Technical field
The present invention relates to injection molding control device technical fields, and in particular to a kind of intelligent control system of injection molding machine injection process
System.
Background technology
Injection molding machine is that the main of variously-shaped plastic products is made with molding die in thermoplastic or thermosetting plastics
Former.
As shown in Figure 1, injection molding is the thermophysical property using plastics, material is added from hopper 3 in barrel 2, material
Cylinder 2 is outer to be heated by heating collar 4, makes material at molten.The screw rod of rotation is driven under the power motor effect being arranged in barrel 2
1, so that material is fed forward and is compacted along screw channel under the action of screw rod 1, dual work of the material in external heat and screw rod shearing
With lower gradual plasticizing, melting and homogenizing, when screw rod 1 rotates, material is under the action of screw channel frictional force and shearing force, having melted
The material melted is pushed into the head of screw rod, and at the same time, screw rod 1 retreats under the reaction of material, and screw head is made to form storing
Plasticizing process is completed in space.Then, screw rod 1 will be stored up under 5 thrust of oil for injection the cylinder piston with high speed, the state of high pressure
Expect in cavity 8 of the melting charge in room 6 by nozzle injection to mold 7, the melt in cavity 8 is fixed by pressurize, cooling, solidification
After type, the opening mold 7 under the action of clamping 9 of mold 7, and stereotyped product is pushed up from mold 7 by liftout attachment
Go out and falls.
Injection molding is typical intermittent, repeated technical process, each injection cycle includes three independent techniques
Stage：Injection stage, packing stage, preformed and cooling stage.There are multiple parameters needs to accurately control in injection moulding process, such as
Speed, temperature, pressure etc., each single item factor all play the role of the quality of injecting products key.The process of injection molding is very short, because
This, the speed of injection is regarded as factor the most key in injection molding process.Injection speed is too fast, and melt is made to enter mould
Irregular flowing is formed when having cavity, the melt exhaust also resulted in mold is bad, finally surface of plastic products is made to occur
Quality problems；Injection speed is excessively slow, keeps the duration of pouring of the melt in mold long, welding occurs so as to cause plastic products
Trace is shorted, the defects of residual stress is excessive.Injection speed is divided into low, high, three stratum of superelevation by Injection Industry, close to obtain
Degree is uniform, stress is small, and size and weight are uniform, and the smooth high precision product in surface needs the speed for accurately controlling injection.
The movement velocity of mold follows the rule of " slow-to-fast-is slow " when injection, and major part injection molding machine uses screw of injection at present
Mode, after mold is closed, nozzle is moved forward and is closely connect with the sprue channel open of mold, finally in given injection speed
Under, screw rod is travelled forward with certain speed to be started to inject, and in the process, will ensure that the control of screw position effective molten
Body filling speed and loading.When mold cavity by polymer-filled to a certain extent after (about 95%), injection screw will
Certain pressure is kept on polymer, and so far, injection process terminates.
The speed control that can be seen that screw rod from entire injection process plays key effect in injection stage, right at present
The control mode of screw speed turns to closed loop from opened loop control, strengthens subsequent feedback control, and control algolithm has various
Iterative algorithm and fuzzy logic neural network etc., but most of verification that do not tested, in conjunction with actual industrial production,
Variety classes plastifying material and finished product requirement, it is different to the rate request of injection stage screw rod, it is most of still based on artificial
A large amount of empirical datas constantly debugged.
Invention content
It is an object of the present invention in order to overcome existing screw in injection molding machine to be needed in the process of running with rich experiences
Worker debugged manually, to reduce production efficiency and the problem of bring human error, provide a kind of injection molding machine note
The intelligence control system for injecting journey, using this system can realize screw rod process it is accurate, automatically control, and combine actual production
Different situations reach different control targes.
To achieve the above object, the intelligence control system of a kind of injection molding machine injection process provided by the invention, including：Image
Collector, central controller and screw driver；The image acquisition device is used to acquire the image of injected sample, and is sent to
Central controller, the image of injected sample is carried out feature extraction by the central controller, by dividing characteristic
Screw rod implementation strategy is generated after analysis, the signal input part of the screw driver is connect with central controller, the screw drive
Device controls the operation of screw in injection molding machine using screw rod implementation strategy, and the screw rod implementation strategy includes：Screw rod is in injection process
The setting of the speed, time point and the stroke that advance in day part, retreat.
As a further improvement of the above technical scheme, the image acquisition device carries out image using CCD camera
Acquisition.
As a further improvement of the above technical scheme, the central controller includes：Signal processing module, feature carry
Modulus block, strategy matching module, policy store module and device driver module；The signal processing module is adopted for receiving image
The picture signal of storage output, and picture signal is handled, the image data identified for characteristic extracting module is generated, it is described
Characteristic extracting module be used to identify the characteristic of injected sample in image data, and the characteristic of acquisition is sent
To strategy matching module, the characteristic includes the material composition of injected sample, material character and sample specification, described
Strategy matching module matches characteristic with the feature composite sequence stored in policy store module, extracts matched
Screw rod implementation strategy corresponding to feature composite sequence, the policy store module are used to store various feature composite sequences,
The feature composite sequence includes being combined by the feature that material composition, material character and sample specification form and its corresponding spiral shell
The signal input part of bar implementation strategy, the device driver module is connect with the signal output end of strategy matching module, this sets
Standby drive module is controlled by screw rod implementation strategy, to drive the operation of screw rod.
As a further improvement of the above technical scheme, the image acquisition device is additionally operable to acquisition injection molding machine in debugging rank
Debugging product image prepared by section；The central controller further includes construction of strategy module and knowledge base, the construction of strategy
Module receives the sample characteristic data and debugging product characteristic of characteristic extracting module output, obtains two kinds of characteristics by comparing
Difference value between, and the difference value is matched with each empirical data stored in knowledge base, the warp obtained with matching
The compensating parameter tested in data carries out motion compensation to debugging operations next time, until the debugging product feature prepared by debugging operations
When difference value between data and sample characteristic data is zero, executed using all processes that current debugging operations are completed as screw rod
The screw rod implementation strategy is recorded and stored in policy store module by strategy, and the empirical data is difference value and compensation
Sequence of mapping between parameter.
As a further improvement of the above technical scheme, the signal processing module includes：A/D converter, signal are put
Big device and filter, the signal for exporting image acquisition device carry out analog-to-digital conversion, amplify and be filtered successively.
As a further improvement of the above technical scheme, the image acquisition device is additionally operable to acquire injection-molded finished figure
Picture；The central controller further includes parameter testing module, and parameter testing model is provided in the parameter testing module,
The parameter testing model receives the sample characteristic data of characteristic extracting module output and injection-molded finished characteristic, and passes through model
Operation obtains the regulated value for being used for screw rod advance in adjusting screw rod implementation strategy, the speed retreated, time point and travel parameters.
As a further improvement of the above technical scheme, the central controller further includes clock module, when described
Clock module is controlled by strategy matching module, so that it is executed injection-molded finished image according to the time shot images collector of setting and is adopted
Collection operation.
A kind of Structure of intelligent control system advantage of injection molding machine injection process of the present invention is：
The system of the present invention passes through feature extraction and analysis by acquiring the image data of injected sample, with characteristic
The screw rod process parameter needed for sample is obtained according to further inverting, the implementation strategy of screw rod is then obtained, utilizes the implementation strategy
It can prepare injection-molded finished with sample indifference under the premise of automatically controlling injection molding machine operation, reduce because of artificial tune
Error and a large amount of debug time, improve work efficiency, reduce operating cost caused by control；To greatly reduce
The difficulty of equipment debugging, makes to prepare injection-molded finished easily controllable in injection moulding process.
Description of the drawings
Fig. 1 is injection molding machine internal view in the prior art；
Fig. 2 is a kind of Structure of intelligent control system schematic diagram of injection molding machine injection process in the embodiment of the present invention；
Fig. 3 is the central controller structural schematic diagram provided in the embodiment of the present invention；
Fig. 4 is the construction of strategy module provided in the embodiment of the present invention and knowledge base connection relationship diagram；
Fig. 5 is the operational flowchart that screw rod implementation strategy is generated using the construction of strategy module in the embodiment of the present invention；
Fig. 6 is the signal processing module structural schematic diagram provided in the embodiment of the present invention.
Reference numeral
1, screw rod 2, barrel 3, hopper
4, heating collar 5, oil cylinder piston 6, storage compartment
7, mold 8, cavity 9, clamping
Specific implementation mode
A kind of injection molding machine of the present invention is injected with reference to the accompanying drawings and examples the intelligence control system of process into
Row is described in detail.
As shown in Fig. 2, a kind of intelligence control system of injection molding machine injection process provided by the invention, including：Image Acquisition
Device, central controller and screw driver；The image acquisition device is used to acquire the image of injected sample, and is sent to center
Controller, the image of injected sample is carried out feature extraction by the central controller, after analyzing characteristic
Screw rod implementation strategy is generated, the signal input part of the screw driver is connect with central controller, screw driver profit
The operation of screw in injection molding machine 1 shown in screw rod implementation strategy control figure 1, the screw rod implementation strategy include：Screw rod exists
The setting of the speed, time point and the stroke that advance in injection process day part, retreat.
Injection screw is the important component of injection molding machine, its effect be plastics are conveyed, are compacted, are melted, are stirred and
Pressure.All these is all rotating to complete in barrel by screw rod.When screw rod rotates, plastics are in machine barrel
Friction and mutually movement can be all generated between wall, screw channel bottom surface, spiral shell rib pressure surface and plastics and plastics.Plastics are forward
Promote this movement combination as a result, and the heat generated that rubs also is absorbed and is moulded for improving plastics temperature and fusing
Material.
For above-mentioned Shooting Technique, the action parameter of screw rod is the key factor for influencing injection molding quality.Some finished products
It needs to shoot high extracting rate rapid fire ability stable molding, such as ultra-thin class finished product, and some finished products are not very high to firing rate requirement.In this feelings
Under condition, it may be necessary to confirm whether the injection rate of machine and firing rate meet the requirements, and then needs the action parameter of adjusting screw rod, with
Meet the preparation process requirement of different product.
Currently, the parametrization setting of injection molding machine still be unable to do without the setting and reparation of artificial experience value, the module of injection molding machine
Change degree is low, needs artificially to adjust a series of parameter if parameter or material are varied from, to seriously affect production
Efficiency.For this purpose, the system of the present invention can be generated by increasing Image Acquisition and rote learning process in injection molding process
Screw rod implementation strategy, i.e. analysis obtain the relevant parameter of screw rod operation, are included in injection process day part the speed advanced, retreated
Degree, time point and travel parameters, these parameters are different in the different production phases；Then, it is controlled automatically with the implementation strategy
The operation of screw rod processed, it is consistent with the various inherent characteristics of injected sample injection-molded finished to prepare, realize screw in injection molding machine behaviour
The intelligent control of work improves the production efficiency of equipment and the quality of finished product.
In order to realize the intelligent control function of screw rod, as shown in figure 3, the central controller in the present embodiment specifically includes：
Signal processing module, characteristic extracting module, strategy matching module, policy store module and device driver module；At the signal
Reason module is used to receive the picture signal of image acquisition device output, and picture signal is handled, and generates for feature extraction mould
The image data of block identification, the characteristic extracting module are used to identify the characteristic of injected sample in image data,
And the characteristic of acquisition is sent to strategy matching module, the characteristic includes the material composition of injected sample, material
Characteristic is combined sequence by material character and sample specification, the strategy matching module with the feature stored in policy store module
Row are matched, and the screw rod implementation strategy corresponding to matched feature composite sequence is extracted, and the policy store module is used
In storing various feature composite sequences, the feature composite sequence includes by material composition, material character and sample specification group
At feature combination and its corresponding screw rod implementation strategy, the signal input part of the device driver module and strategy matching mould
The signal output end of block connects, which is controlled by screw rod implementation strategy, to drive the operation of screw rod.
Image is acquired as shown in figure 3, CCD camera can be used in the image acquisition device in present system.CCD is
The abbreviation of Charge Coupled Device (charge coupling device), it is a kind of semiconductor imaging device, thus with sensitive
Degree is high, resists the advantages that small, small strong light, distortion, long lifespan, anti-vibration；In addition, the present invention passes through with CCD camera reality
Existing Image Acquisition, can obtain the higher clear image of resolution ratio, provide safeguard for the subsequent data analysis of central controller.
Injection molding machine needs before manufacture by experimental debugging repeatedly, finally obtains and a series of meets production requirement
Parameter, these parameters generally as terminal user use standard, i.e., as the screw rod implementation strategy corresponding to various samples.For
Acquisition above-mentioned screw rod implementation strategy, as shown in figure 4, may also include construction of strategy module in the central controller of the present invention and know
Know library, further, the image acquisition device is additionally operable to the debugging product image that acquisition injection molding machine is prepared in the debugging stage, is real
It tests debugging and strategy generating provides reference frame.Specifically, operating process referring to Figure 5, the construction of strategy module
The sample characteristic data and debugging product characteristic for receiving characteristic extracting module output, by comparing obtain two kinds of characteristics it
Between difference value, and the difference value is matched with each empirical data stored in knowledge base, the experience number obtained with matching
Compensating parameter in carries out motion compensation to debugging operations next time, until the debugging product characteristic prepared by debugging operations
When difference value between sample characteristic data is zero, plan is executed using all processes that current debugging operations are completed as screw rod
Slightly, which is recorded and stored in policy store module.
A large amount of empirical data is stored in above-mentioned knowledge base, the empirical data is between difference value and compensating parameter
Sequence of mapping.The empirical data is that the screw action data recorded with debugging stage and actual production stage carry out rote learning
And obtain.
In the equipment debugging stage, the adjustment data of most equipment will not be recorded, and only remained one group and finally accorded with
The parameter that symphysis production needs.And these tune-up datas can help system find the sources of various problems, industrial production is come
Say play the role of it is vital.For this purpose, present system increases a large amount of tune during the self-teaching of knowledge base
Data are tried to record the debugging process done, according to the affiliated part of problem that is, in the debugging process before equipment manufacture
Sort out, using the data after classification as the foundation of study.
In the actual production stage, continuous real-time collecting creation data and optimization data are needed, optimization data are big in early period
It is obtained in the actual production of amount, system meets by all creation datas and every time under the final optimization pass data preservation of production requirement
Come, while the also foundation as knowledge base self study, further increases the learning ability of knowledge base.
With the increase of injection molding machine operating time so that there is abrasion, loosening and aging phenomenon in each component inside injection molding machine,
And then the accuracy of machine Control system is caused to be gradually reduced.For example, the driving equipment of screw rod is due to long-time is in hot environment
Its power is caused to decline, to reduce the rotating speed and forward speed of screw rod；Screw rod is because long-time rubs and shears so that screw channel
Depth shallower, and if then cause screw rod still with existing speed operation cannot achieve effective plasticizing, to subsequent injection operation
It impacts.If using changeless operational mode to control the operation of screw in injection molding machine always, will necessarily reduce this is
The control effect of system, and then lead to the final product quality prepared worse and worse, it is far below sample standard, or even occur a large amount of residual
Substandard products.
For this purpose, as shown in figure 3, the image acquisition device is additionally operable to acquire injection-molded finished image；The center control
Device processed further includes parameter testing module, and parameter testing model is provided in the parameter testing module, the parameter testing model
The sample characteristic data of characteristic extracting module output and injection-molded finished characteristic are received, and is obtained by model calculation for adjusting
Save the regulated value of screw rod advance in screw rod implementation strategy, the speed retreated, time point and travel parameters.Make currently performed plan
Summary can meet the preparation requirement of sample always, to improve the intelligent control function of system and the stability of system operation,
Safety.
Each action of screw rod is after correction, and system can all be verified, it is ensured that this time according to the parameter manipulation of debugging
Quality problems are not generated, if massless problem, the screw rod implementation strategy after debugging is updated into policy store module,
With stored strategy before replacement；If there is quality problems, need further to execute parameter tune by parameter testing module
Examination operation until the final product quality prepared meets sample requirement, then completes the update of strategy.
As shown in figure 3, the central controller further includes clock module, the clock module is by strategy matching module
Control makes it execute injection-molded finished Image Acquisition according to the time shot images collector of setting and operates, to monitor in real time
The quality of finished product, and the adjustment of parameter is carried out according to image data in time, improve the stability of injection molding preparation process.
In addition, as shown in fig. 6, the signal processing module can be by the A/D converter of setting, the simulation that is received
Signal is converted to the digital signal identified for characteristic extracting module；Meanwhile in order to reduce the noise jamming of signal, improving signal
Detection accuracy, the signal processing module may also include signal amplifier and filter, for export image acquisition device
Signal is amplified and is filtered.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be understood by those of ordinary skill in the art that, to the technical side of the present invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Right in.
Claims (7)
1. a kind of intelligence control system of injection molding machine injection process, which is characterized in that including：Image acquisition device, central controller
And screw driver；The image acquisition device is used to acquire the image of injected sample, and is sent to central controller, described
The image of injected sample is carried out feature extraction by central controller, and plan is executed by generating screw rod after analyzing characteristic
Slightly, the signal input part of the screw driver is connect with central controller, which utilizes screw rod implementation strategy
The operation of screw in injection molding machine is controlled, the screw rod implementation strategy includes：Screw rod advances in injection process day part, retreats
The setting of speed, time point and stroke.
2. the intelligence control system of injection molding machine injection process according to claim 1, which is characterized in that the image is adopted
Storage is acquired image using CCD camera.
3. the intelligence control system of injection molding machine injection process according to claim 1, which is characterized in that the center control
Device processed includes：Signal processing module, characteristic extracting module, strategy matching module, policy store module and device driver module；Institute
Picture signal of the signal processing module for receiving image acquisition device output is stated, and picture signal is handled, is generated for spy
The image data of extraction module identification is levied, the characteristic extracting module is used to identify the spy of injected sample in image data
Data are levied, and the characteristic of acquisition is sent to strategy matching module, the characteristic includes the material of injected sample
Ingredient, material character and sample specification, the spy that the strategy matching module will store in characteristic and policy store module
Sign composite sequence is matched, and extracts the screw rod implementation strategy corresponding to matched feature composite sequence, the strategy is deposited
For storage module for storing various feature composite sequences, the feature composite sequence includes by material composition, material character and sample
The feature combination of product specification composition and its corresponding screw rod implementation strategy, the signal input part and plan of the device driver module
The slightly signal output end connection of matching module, which is controlled by screw rod implementation strategy, to drive the operation of screw rod.
4. the intelligence control system of injection molding machine injection process according to claim 3, which is characterized in that the image is adopted
Storage is additionally operable to the debugging product image that acquisition injection molding machine is prepared in the debugging stage；The central controller further includes construction of strategy
Module and knowledge base, the construction of strategy module receive the sample characteristic data and debugging product feature of characteristic extracting module output
Data, by comparing the difference value obtained between two kinds of characteristics, and each experience that will be stored in the difference value and knowledge base
Data are matched, and the compensating parameter in the empirical data obtained with matching carries out motion compensation to debugging operations next time, directly
When to the difference value between debugging product characteristic and the sample characteristic data prepared by debugging operations being zero, grasped with current debugging
The screw rod implementation strategy is recorded and stored in policy store module by all processes for making to complete as screw rod implementation strategy,
Sequence of mapping of the empirical data between difference value and compensating parameter.
5. the intelligence control system of injection molding machine injection process according to claim 3, which is characterized in that at the signal
Managing module includes：A/D converter, signal amplifier and filter, the signal for exporting image acquisition device carry out mould successively
Number conversion is amplified and is filtered.
6. the intelligence control system of injection molding machine injection process according to claim 3, which is characterized in that the image is adopted
Storage is additionally operable to acquire injection-molded finished image；The central controller further includes parameter testing module, the parameter tune
Parameter testing model is provided in die trial block, the parameter testing model receive characteristic extracting module output sample characteristic data and
Injection-molded finished characteristic, and obtained by model calculation and advanced for screw rod in adjusting screw rod implementation strategy, retreated speed,
The regulated value of time point and travel parameters.
7. the intelligence control system of injection molding machine injection process according to claim 6, which is characterized in that the center control
Device processed further includes clock module, and the clock module is controlled by strategy matching module, makes its time excitation figure according to setting
As collector executes injection-molded finished Image Acquisition operation.
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| CN201810334203.2A CN108544724A (en) | 2018-04-14 | 2018-04-14 | A kind of intelligence control system of injection molding machine injection process |
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| CN201810334203.2A CN108544724A (en) | 2018-04-14 | 2018-04-14 | A kind of intelligence control system of injection molding machine injection process |
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Cited By (6)
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| CN109435429A (en) * | 2018-10-24 | 2019-03-08 | 郭桐汐 | A kind of multi-functional automatic control system for laminating machine |
| CN112976520A (en) * | 2021-02-05 | 2021-06-18 | 深圳市浦联智能科技有限公司 | Self-adaptation method for injection molding machine |
| CN113771321A (en) * | 2020-06-09 | 2021-12-10 | 鸿富锦精密电子(天津)有限公司 | System and method for monitoring state of injection molding machine |
| CN114179320A (en) * | 2021-11-11 | 2022-03-15 | 苏州精思博智人工智能科技有限公司 | Automatic adjusting method for technological parameters of injection molding machine in combination with visual detection |
| CN114347413A (en) * | 2021-12-16 | 2022-04-15 | 苏州瑞尔福精密模具有限公司 | Intelligent control system for injection molding and control method thereof |
| CN114521168A (en) * | 2019-09-27 | 2022-05-20 | 住友重机械工业株式会社 | Injection molding machine, management system and controller |
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| CN114347413A (en) * | 2021-12-16 | 2022-04-15 | 苏州瑞尔福精密模具有限公司 | Intelligent control system for injection molding and control method thereof |
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