CN102441972A - Control method for mould unloading accurate positioning of injection molding machine - Google Patents
Control method for mould unloading accurate positioning of injection molding machine Download PDFInfo
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- CN102441972A CN102441972A CN2011104118437A CN201110411843A CN102441972A CN 102441972 A CN102441972 A CN 102441972A CN 2011104118437 A CN2011104118437 A CN 2011104118437A CN 201110411843 A CN201110411843 A CN 201110411843A CN 102441972 A CN102441972 A CN 102441972A
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- die sinking
- injection moulding
- moulding machine
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- mould open
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Abstract
The invention discloses a control method for mould unloading accurate positioning of an injection molding machine. A hidden control section is increased in an entire mould unloading stroke control program of the injection molding machine and is closest to a mold unloading stop position; proper hidden pressure and flow rate can be obtained by testing at an equipment debugging stage and are set to be fixed pressure value P and speed value V to output hidden pressure and flow rate; and thus, stable and accurate mold unloading action of the injection molding machine is realized. The control method has the advantages that: out-of-tolerance of control over mould unloading stop positioning caused by mistakenly setting mould unloading section parameters or pressure and flow rate parameters by a user can be avoided; and during actual operation of the injection molding machine, if mould unloading stop positioning deviation is caused by disturbance factors such as actual load change, lubrication condition change, hydraulic oil temperature change and the like, the deviation can be automatically corrected by an injection molding machine control system to realize accurate positioning.
Description
Technical field
The present invention relates to the control method of injection moulding machine mould open location, be fit to the control occasion that die sinking position location precision has high requirements.
Background technology
In the process data for injection machine control, the die sinking positioning accuracy is an important process variable, and die sinking steadily and accurately stops the position location, and is when injection machine cooperates automatic extracting mechanical arm, particularly important.After injection moulding machine mould open stops to put in place, automatically be advanced into injection machine under the extracting mechanical arm, the descending back that puts in place is from the Injection Motor Template product that gets on to walk.Because it all is certain automatically taking out the each downstream position that gets into injection machine of machinery,, just possibly cause automatic extracting mechanical arm can't catch product or bump with injection machine if injection moulding machine mould open stops the positioning control instability.
At present stop the control of position location for injection moulding machine mould open; Usually adopt conventional segmentation control; Promptly on the injection machine human-computer interaction interface,, operation sets for providing some control segmentations; The operator adjusts the switching position of different segmentations and the pressure and the flow of each segmentation according to the actual conditions of die sinking course of action.Injection machine based on operator's setting, quickens or deceleration in actual die sinking action, and final die sinking stops at the stop position of setting.
The inventor finds current this control mode in realizing process of the present invention, exist two big drawbacks at least. at first; Because the control segmentation in all die sinking processes is all opened to the user and is set, and causes user's actual operational capacity very high; If the user lacks use experience, use excessive pressure and flow in the last segmentation of die sinking control, or interval, die sinking last segmentation position not enough big; To cause die sinking to stop to control overproof, the die sinking overshoot is serious; If the user be provided with excessive between die sinking position segmentation area postrema or the die sinking pressure flow too small, it is long slowly to cause the die sinking process to be crossed again, even die sinking can't arrive the position location; Secondly, it is very big that the action of fluid pressure type injection machine control is influenced by oily temperature, and injection machine must have very big variation from starting shooting the warm acting in conjunction because of environment temperature and self-heating of continuous production later stage oil; Mechanical part is because of self variation of temperature, and lubrication circumstances is different, and friction load is also inequality; Therefore, even the operator can be provided with rational die sinking motion control parameter, also can cause injection moulding machine mould open to stop position location control deviation takes place, and cooperate the generation problem because of the reason of above-mentioned disturbance factor with automatic extracting mechanical arm.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of injection moulding machine mould open pinpoint control method for the drawback that exists in the accurate positioning control of the die sinking that overcomes present conventional fluid pressure type injection machine, makes it easy to operate, is not prone to deviation.
The present invention for the scheme that technical problem adopted above the solution is: the pinpoint control method of a kind of injection moulding machine mould open; In the whole opening stroke control program of injection machine, increase the control segmentation of hiding; The control segmentation is near the die sinking stop position, and in the equipment debugging stage, test obtains suitable hiding pressure and flow; Be arranged to fixed pressure P and speed V value and export, realize the steady and accurate of injection moulding machine mould open action to hide pressure and flow.
Above-mentioned hiding control segmentation is preferably two, is the final stage of die sinking and second from the bottom section, is respectively location segment parameter p os1, the pressure P 1 and the speed V1 of corresponding pos1 segmentation; Location segment parameter p os2, the pressure P 1 and the speed V2 of corresponding pos2 segmentation are in the equipment debugging stage; Test obtains suitable hiding pressure and flow; Back two sections controls that injection moulding machine mould open is moved are exported to hide pressure and flow, realize the steady and accurate of injection moulding machine mould open action.
Also in the injection moulding machine mould open control program, increase die sinking location valid interval parameter; This parameter is that the die sinking stop position of setting with injection machine is a basic point; Positive and negative both direction forms effective district, when the injection moulding machine mould open physical location falls within this effective district, thinks that then actual die sinking position is accurate.
In the injection moulding machine mould open control program, increase the die sinking position adaptation function; If actual die sinking stop position does not fall into effectively district, above-mentioned die sinking location in the actual bets molding machine operation process, then write down and pick up actual die sinking stop position automatically with respect to the deviate that the die sinking stop position is set, in the Manufacturing Automated process; If the die sinking deviation of a N continuous Automatic Cycle periodic sampling exceeds effectively district, die sinking location; Then getting maximum die sinking deviations, is corrected parameter with this deviate, increases or reduce to set the die sinking stop position; New die sinking as follow-up circulation stops the position location, the die sinking deviations that takes place in producing with revisal.
Above-mentioned N is preferably 10.
In actual die sinking motion control, no matter how other parameters are set, and die sinking stops positional parameter can being set for the operator, and we are defined as l here.When die sinking moves to the l-pos1 position; Injection machine control program reality is according to P1 and V1 output pressure flow; And P1 and V1 just preestablish completion according to the test run situation by injection machine debugging technique personnel in the machine debug phase; P1 and V1 should be enough rationally, guarantee injection machine the final stage of die sinking campaign can with one relatively steadily and rapidly motion mode stop the position location to die sinking and approach; On alternating interface between man and computer, be provided with excessive and too small parameter even the purpose that this parameter is set up is the operator, control system reality also can be avoided the Reasonable Parameters output that these parameters are hidden according to inside at the later stage of motion when carrying out.
In actual die sinking motion control; When the die sinking campaign l-pos1 position when arriving l-pos2; Injection machine control program reality is according to P2 and V2 output pressure flow; And P2 and V2 just preestablish completion according to the test run situation by injection machine debugging technique personnel in the machine debug phase; P1 and V1 should be enough little, can guarantee that injection moulding machine mould open motion control final stage is very little with one but the motion mode that is enough to drive the die sinking campaign stops the position location to die sinking approaches up to arrival and stop.
Also increase a die sinking position adaptation function.
At the inner die sinking position Self Adaptive Control block of program; Effectively district Q of a program variable die sinking location is arranged; If actual die sinking position y is in being ceased to have effect in the zone in die sinking when the die sinking action stops; Then < < l+Q, situation lower open die stops positioning control in this does not have overproofly y l-Q, need not carry out the die sinking revision program.If continuous 10 the actual die sinking of Automatic Cycle position location y not in this zone, the program maximum die sinking deviation x that takes a sample then, x=y-l; If x is a negative, explain that the die sinking position location is not enough, if x is a positive number, explain that the die sinking position location is excessive; The deviation X of 10 Automatic Cycle of sampling, the maximum x that takes absolute value is as die sinking location compensation corrected parameter, the 11st circulation at first; Automatically the negate addition of l and x, use as new l, new l compensated die sinking exactly and stopped positional parameter; After the die sinking of the 11st mould finished, die sinking deviation x was compensated, and has realized that automatic die sinking stops the makeover process of position location like this.
Compared with prior art; The invention has the advantages that: for the injection machine user; The segmentation location parameter of die sinking process and pressure flow parameter do not need strict setting and debug process, have reduced the operation threshold, the die sinking position deviations of avoiding misspecification to cause; For injection machine itself, even the location is unstable because the external disturbance factor causes die sinking, program also can be revised automatically, avoids human intervention, has improved the control effect.
The specific embodiment
Below in conjunction with practical examples the present invention is done and to describe in further detail.
The pinpoint control method of injection moulding machine mould open is specific as follows:
If injection moulding machine mould open stops positional parameter l and is set at 700mm, requiring each die sinking to stop anchor point is 700mm.
According to the real-world operation situation, setting the pos1 position is 50mm, and the penult segmentation switching point of die sinking campaign is exactly 700-50=650mm so; Set P1=45bar, V1=25% is even the client sets excessive pressure and flow in die sinking process previous segment so; Such as 140bar; 99% flow, program also can be reduced to a pressure, flow 45bar and 25% when die sinking ran to 650mm, approached this impact point of 700mm stably with such state.
According to the real-world operation situation; Setting the pos2 position is 20mm, and last segmentation switching point of die sinking campaign is exactly 700-20=680mm so, P2=25bar; V2=15%; Program can be with a minimum pressure flow 25bar and 15% that can make the die sinking operation time the 680mm for the die sinking process operation so, with one slowly motion state promote die sinking to the target location and stop, little pressure and speed are more prone to control.
If die sinking actual stop position y, then in the automatic production cycle of the injection machine stage, after each die sinking operation puts in place, the injection machine control program actual die sinking stop position y that samples; As the 1 die sinking stop position that circulates is 702mm, then takes y and die sinking location valid interval to compare, and for example effectively to distinguish parameter Q be 2mm to the location of die sinking at present, so based on calculating; Die sinking location effectively district is exactly from 700-2 to 700+2, and promptly from 698mm to 702mm, current actual die sinking stop position y is 702mm; Be in effectively district, die sinking location, then do not need compensation, if actual die sinking position y is 666mm; Less than 698mm, illustrate that actual die sinking position has exceeded effectively district, die sinking location, then program is taken a sample to this numerical value; Be retained in the internal memory, if continuous 10 actual die sinking positions of program sampling have all exceeded effectively district, die sinking location in the time Automatic Cycle, then the program judgement need be carried out the compensation automatically of die sinking location; Then take out maximum die sinking deviation, for example maximum die sinking deviation occurs in the 8th circulation of sampling beginning, and die sinking actual location position is 717mm in this circulation; Based on calculating, maximum die sinking deviations is exactly 717-700, and maximum sampling die sinking deviation x is 17mm.The 11st circulation beginning, when the die sinking action stopped, program was to the x negate so; By the time-and 17mm, x and l addition, be exactly 700-17=683mm; It is exactly 683mm that so new die sinking stops positional parameter l; Then in follow-up circulation, die sinking stops the position location and always can remain on about 700mm, has realized compensate function.
Claims (5)
1. pinpoint control method of injection moulding machine mould open; It is characterized in that: in the whole opening stroke control program of injection machine, increase the control segmentation of hiding; The control segmentation is near the die sinking stop position, and in the equipment debugging stage, test obtains suitable hiding pressure and flow; Be arranged to fixed pressure P and speed V value and export, realize the steady and accurate of injection moulding machine mould open action to hide pressure and flow.
2. the pinpoint control method of injection moulding machine mould open as claimed in claim 1; It is characterized in that: said hiding control segmentation is preferably two; Be the final stage of die sinking and second from the bottom section, be respectively location segment parameter p os1, the pressure P 1 and the speed V1 of corresponding pos1 segmentation; Location segment parameter p os2, the pressure P 1 and the speed V2 of corresponding pos2 segmentation are in the equipment debugging stage; Test obtains suitable hiding pressure and flow; Back two sections controls that injection moulding machine mould open is moved are exported to hide pressure and flow, realize the steady and accurate of injection moulding machine mould open action.
3. according to claim 1 or claim 2 the pinpoint control method of injection moulding machine mould open; It is characterized in that: also in the injection moulding machine mould open control program, increase die sinking location valid interval parameter; This parameter is that the die sinking stop position of setting with injection machine is a basic point; Positive and negative both direction forms effective district, when the injection moulding machine mould open physical location falls within this effective district, thinks that then actual die sinking position is accurate.
4. the pinpoint control method of injection moulding machine mould open as claimed in claim 3; It is characterized in that: in the injection moulding machine mould open control program, increase the die sinking position adaptation function; If actual die sinking stop position does not fall into effectively district, above-mentioned die sinking location in the actual bets molding machine operation process, then write down and pick up actual die sinking stop position automatically with respect to the deviate that the die sinking stop position is set, in the Manufacturing Automated process; If the die sinking deviation of a N continuous Automatic Cycle periodic sampling exceeds effectively district, die sinking location; Then getting maximum die sinking deviations, is corrected parameter with this deviate, increases or reduce to set the die sinking stop position; New die sinking as follow-up circulation stops the position location, the die sinking deviations that takes place in producing with revisal.
5. the pinpoint control method of injection moulding machine mould open as claimed in claim 4 is characterized in that: said N is 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104118437A CN102441972A (en) | 2011-12-13 | 2011-12-13 | Control method for mould unloading accurate positioning of injection molding machine |
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| CN2011104118437A CN102441972A (en) | 2011-12-13 | 2011-12-13 | Control method for mould unloading accurate positioning of injection molding machine |
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| CN102441972A true CN102441972A (en) | 2012-05-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111152431A (en) * | 2020-01-16 | 2020-05-15 | 宁波伊士通控制技术有限公司 | Efficient mold opening control method for injection molding machine |
| CN114131867A (en) * | 2022-01-21 | 2022-03-04 | 盟立自动化科技(上海)有限公司 | Intelligent correction die sinking positioning method for hydraulic oil temperature change of injection molding machine |
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| CN101327641A (en) * | 2008-07-29 | 2008-12-24 | 夏善海 | Accurate control method of die sinking position of injection moulding machine |
| JP4438745B2 (en) * | 2003-12-18 | 2010-03-24 | 三菱電機株式会社 | Control device for injection molding machine |
| CN102001167A (en) * | 2010-09-07 | 2011-04-06 | 华南理工大学 | Plunger pump type hydraulic injection moulding machine system driven by servo motor and control method thereof |
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2011
- 2011-12-13 CN CN2011104118437A patent/CN102441972A/en active Pending
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| JP4438745B2 (en) * | 2003-12-18 | 2010-03-24 | 三菱電機株式会社 | Control device for injection molding machine |
| CN101327641A (en) * | 2008-07-29 | 2008-12-24 | 夏善海 | Accurate control method of die sinking position of injection moulding machine |
| CN102001167A (en) * | 2010-09-07 | 2011-04-06 | 华南理工大学 | Plunger pump type hydraulic injection moulding machine system driven by servo motor and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111152431A (en) * | 2020-01-16 | 2020-05-15 | 宁波伊士通控制技术有限公司 | Efficient mold opening control method for injection molding machine |
| CN114131867A (en) * | 2022-01-21 | 2022-03-04 | 盟立自动化科技(上海)有限公司 | Intelligent correction die sinking positioning method for hydraulic oil temperature change of injection molding machine |
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Application publication date: 20120509 |