CN102233657A - Computing device of electric power consumption for injection molding machine and computing method of electric power consumption - Google Patents
Computing device of electric power consumption for injection molding machine and computing method of electric power consumption Download PDFInfo
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- CN102233657A CN102233657A CN2011100980078A CN201110098007A CN102233657A CN 102233657 A CN102233657 A CN 102233657A CN 2011100980078 A CN2011100980078 A CN 2011100980078A CN 201110098007 A CN201110098007 A CN 201110098007A CN 102233657 A CN102233657 A CN 102233657A
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- electric power
- consumption electric
- injection machine
- molding condition
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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
- B29C45/7666—Measuring, controlling or regulating of power or energy, e.g. integral function of force
Abstract
The invention provides a computing device of electric power consumption for an injection molding machine and a computing method of electric power consumption. The electric power consumption can be predicted based on the molding condition. The computing device of electric power consumption (26, 35) comprises an input mechanism (35) for inputting molding conditions, a storing mechanism (262) for storing an approximate formula for calculating the electric power consumption when the injection molding machine works under the molding condition that is input into the input mechanism, and a calculating mechanism of electric power consumption (261) which calculates the electric power consumption of the injection molding machine by the approximate formula stored in the storing mechanism based on the molding condition input in the input mechanism.
Description
Technical field
The application advocates the priority based on the Japanese patent application of on April 23rd, 2010 application 2010-100290 number.The full content of its application is applied in this specification by reference.
The present invention relates to a kind of injection machine with consuming the electric power calculation element and consuming the electric power computational methods.
Background technology
Injection moulding in the injection machine typically is made of following operation: mold closing operation, closing molding; The matched moulds operation, fastening mould; Nozzle contact operation is with the cast gate of nozzle pressing at mould; Injection process advances the screw rod in the cylinder, and the melted material that stores in screw rod the place ahead is injected in the mold cavity; The pressurize operation temporarily applies for the generation that suppresses bubble, shrink mark afterwards and keep-ups pressure; Plasticization, measurement process, the molten material cools in being filled in mold cavity and solidify till during time in, for next one circulation and rotary screw, when making the resin fusion, lodge in the place ahead of cylinder; The die sinking operation is in order to take out the formed products that is cured and to open mould from mould; And formed products ejects operation, releases formed products by the knock pin that is arranged at mould.
Employed electric power in the electrodynamic type injection machine comprises the heater that is arranged at for molten resin around the heating cylinder consumption electric power with electric power and various electro-motors.The motor that is assembled in the electrodynamic type injection machine has injection motor, screw rod rotation to open and close with motor, eject with various electro-motors such as motors with motor, mould.
The known in the past control device that following injection machine is arranged: the consumption electric power in the testing also carries out the demonstration of relevant this consumption electric power, possesses: testing agency, the consumption electric power in the testing; The electric energy arithmetical organ is obtained the electric energy of appointment detection time of any appointment according to the consumption electric power that is detected.Obtain predetermined transitional information (carbon dioxide output information, electricity charge information etc.) according to the electric energy that obtains, together show transitional information (for example, with reference to patent documentation 1) with electric energy.
Patent documentation 1: TOHKEMY 2007-83432 communique
But, but the change of actual molding condition diversity, so by each various molding condition practical measurement electric energy, spended time is long, efficient is low.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of injection machine usefulness consumption electric power calculation element and the consumption electric power computational methods that can predict the consumption electric power of injection machine according to molding condition.
To achieve these goals, according to an aspect of the present invention,, be used for injection machine, it is characterized in that possessing for a kind of consumption electric power calculation element:
Input mechanism, the input forming condition;
Storing mechanism, storage are used to calculate the approximate expression of the consumption electric power when making described injection machine work with the molding condition that inputs to this input mechanism; And
Consume the electric power calculation mechanism,, calculate the consumption electric power of described injection machine by the approximate expression that is stored in described storing mechanism according to the molding condition that inputs to described input mechanism.
And, according to a further aspect in the invention,, be used for injection machine for a kind of consumption electric power computational methods, it is characterized in that possessing:
Input step, the input forming condition;
Reading step is read the approximate expression that is used for calculating the consumption electric power when making described injection machine work with the molding condition of importing at described input step from storing mechanism; And
Consume the electric power calculation procedure,, calculate the consumption electric power of described injection machine by described approximate expression of reading according to the molding condition of in described input step, importing.
The effect of invention
According to the present invention, obtain and to predict the injection machine of the consumption electric power of injection machine consumption electric power calculation element and consumption electric power computational methods according to molding condition.
Description of drawings
Fig. 1 is the figure of major part structure of an example of the injection machine 1 of the expression consumption electric power calculation element of using one embodiment of the invention.
Fig. 2 is the functional block diagram of the expression major function portion relevant with the consumption electric power computing function of controller 26.
Fig. 3 is the flow chart of expression by the flow process of an example of the main processing of the consumption electric power computational methods of controller 26 realizations.
Fig. 4 is the functional block diagram of the expression major function portion relevant with the best molding condition computing function of controller 26.
Fig. 5 is the flow chart of expression by the flow process of an example of the main processing of the best molding condition computational methods of controller 26 realizations.
Among the figure: 1-injection machine, 11-servo motor, 12-ball-screw, the 13-nut, 14-pressure plare, 15, the 16-guide rod, the 17-bearing, 18-load cell, 19 injection shafts, the 20-screw rod, 21-heats cylinder, 22-hopper, 23-links parts, 24-servo motor, 26-controller, the 27-position detector, the 28-amplifier, 31, the 32-encoder, the 35-user interface, the 42-servo motor, the 44-servo motor, 43, the 45-encoder, 261-consumes the electric power calculating part, 262-approximate expression storage part, the best molding condition calculating part of 263-.
The specific embodiment
Below, describe being used to implement optimal way of the present invention with reference to accompanying drawing.
Fig. 1 is the figure of major part structure of an example of the injection machine 1 of the expression consumption electric power calculation element of using one embodiment of the invention.
Injection machine 1 is the electrodynamic type injection machine in this example, possesses injection servo motor 11.The rotation of injection servo motor 11 reaches ball-screw 12.The nut 13 of the rotation forward-reverse by ball-screw 12 is fixed in pressure plare 14.Pressure plare 14 can move along the guide rod 15,16 that is fixed in mounting (not shown).The forward-reverse of pressure plare 14 moves through bearing 17, load cell 18, injection shaft 19 and reaches screw rod 20.Screw rod 20 rotatable and can be to disposing in the cylinder 21 in heating with moving axially.The rear portion of the screw rod 20 in the heating cylinder 21 is provided with resin and supplies with hopper 22.The rotatablely moving of servo motor 24 of screw rod rotation usefulness is conveyed to injection shaft 19 by binding parts 23 such as conveyer belt or belt wheels.That is, drive injection shaft 19 by the screw rod rotation with servo motor 24 rotations, thereby screw rod 20 is rotated.
In plasticization, measurement process, screw rod 20 retreats in the rotation in heating cylinder 21, thereby molten resin is stored in the front portion of screw rod 20, promptly heats the nozzle 21-1 side of cylinder 21.In injection process, be filled in the mould and pressurization forms by the molten resin that will be stored in screw rod 20 the place aheads.At this moment, the power of extrusion resin is used as reaction force by load cell 18 and detects.That is, detect the resin pressure of screw rod front portion.The pressure that detects amplifies by load cell amplifier 25, and inputs to the controller 26 (control device) that plays a role as controlling organization.And in the pressurize operation, the resin that is filled in the mould is retained as predetermined pressure.
The position detector 27 of the amount of movement that is used to detect screw rod 20 is installed on the pressure plare 14.The detection signal of position detector 27 inputs to controller 26 by amplifier 28 amplifications.This detection signal also can use for the translational speed that detects screw rod 20.
Servo motor 42 is used servo motor for mould opens and closes, and servo motor 44 is used servo motor for formed products ejects (backing-out punch).Servo motor 42 for example drives angle lever (not shown) and realizes that mould opens and closes.And servo motor 44 for example moves knock-pin (not shown) by ball screw framework, thereby realizes that formed products ejects.Possess respectively on the servo motor 42,44 and be useful on the encoder 43,45 that detects rotating speed.Input to controller 26 respectively by encoder 43,45 detected rotating speeds.
1 cycle of the injection moulding in the injection machine 1 typically is made of following operation: mold closing operation, closing molding; The matched moulds operation, fastening mould; Nozzle contact operation, with nozzle (not shown) by the cast gate that is pressed in mould (not shown); Injection process the screw rod 20 in the cylinder 21 is advanced, and the melted material that will store in screw rod 20 the place aheads is injected to (not shown) in the mold cavity; The pressurize operation afterwards, temporarily applies for the generation that suppresses bubble, shrink mark and to keep-up pressure; Plasticization, measurement process, the molten material cools in being filled in mold cavity and solidify till during time in, for next one circulation, rotary screw 20, when making the resin fusion, accumulate in the place ahead of heating cylinder 21; The die sinking operation is in order to take out the formed products that has solidified and to open mould from mould; And formed products ejects operation, releases formed products by the knock pin (not shown) that is arranged at mould.
In the present embodiment, controller 26 possesses the consumption electric power computing function of predictably calculating the consumption electric power that is produced by the action of injection machine 1.
Fig. 2 is the functional block diagram of the expression major function portion relevant with the consumption electric power computing function of controller 26.
Consume molding condition that electric power calculating part 261 will be by user interface 35 inputs and come computing to be contained in the approximate expression of approximate expression storage part 262, thereby predictability ground calculates the consumption electric power that the action by injection machine 1 produces as input parameter.
At this, an example of the approximate expression that is contained in approximate expression storage part 262 is described.
At first, the parameter of molding condition (input parameter), for example be below:
T: circulation timei
T
M-OC: mould opens and closes the time
T
ME: the metering time
T
CA: the matched moulds time
F
CA: mold clamping force
S
M-OC: mould opens and closes stroke
V
M-OC: the mould opening and closing speed
S
S: loading
V
S: injection speed
V
ME: the rotating speed of screw rod 20 during metering
P
HP: keep-up pressure
T
HP: the dwell time
Calculate the consumption electric power W that mould opens and closes operation with following approximate expression
M-OC
W
M-OC＝a1·S
M-OC+a2·V
M-OC+a0
Wherein, a1, a2, a0 are predetermined coefficient, also can be suitable for by multiple regression analysis.Therefore, the motor that opens and closes the servo motor 42 of operation of the mould in 1 cycle consumes electric power W
1By following calculating.
W
1＝W
M-OC×T
M-OC/T
Calculate the consumption electric power W of injection process with following approximate expression
S
W
S＝b1·S
S+b2·V
S+b0
Wherein, b1, b2, b0 are predetermined coefficient, also can be suitable for by multiple regression analysis.Therefore, the motor of the servo motor 11 of the injection process in 1 cycle consumes electric power W
2By following calculating.
W
2＝W
S×(S
S/V
S)/T
The motor that calculates measurement process with following approximate expression consumes electric power W
ME
W
ME＝c1·V
ME+c2
Wherein, c1, c2 are predetermined coefficient, can be suitable for by least square method.Therefore, the motor of the servo motor 24 of the measurement process in 1 cycle consumes electric power W
3By following calculating.
W
3＝W
ME×T
ME/T
Calculate the consumption electric power W of matched moulds operation with following approximate expression
CA
W
CA＝d1·F
CA+d2·T
CA+d3
Wherein, d1, d2, d3 are predetermined coefficient, also can be suitable for by multiple regression analysis.Therefore, the motor of the matched moulds operation in 1 cycle consumes electric power W
4By following calculating.
W
4＝W
CA×T
CA/T
Calculate the consumption electric power W of pressurize operation with following approximate expression
H
W
HP＝e1·P
HP+e2·T
HP+e3
Wherein, e1, e2, e3 are predetermined coefficient, also can be suitable for by multiple regression analysis.Therefore, the motor of the servo motor 11 of the pressurize operation in 1 cycle consumes electric power W
5By following calculating.
W
5＝W
HP×T
HP/T
Calculate the heater power W of measurement process with following approximate expression
H-ME
W
H-ME＝f1·V
ME 2+f2·V
ME+f3
Wherein, f1, f2, f3 are predetermined coefficient, can be suitable for by least square method.Therefore, the heater power of the measurement process in 1 cycle consumes electric power W
6By following calculating.
W
6＝W
H-ME×T
ME/T
Consume electric power calculating part 261 with the parameter substitution of molding condition to above-mentioned each approximate expression and the wastage in bulk or weight electric power W in following calculating 1 cycle
Total
W
Total＝W
1+W
2+W
3+W
4+W
5+W
6+W
7+W
8
Wherein, W
7Represent the stand-by electric of the motor in 1 cycle, can use measured value.W
8The heater stand-by electric of representing the measurement process in 1 cycle can use the stand-by electric W of heater
H(measured value) is by W
8=W
H* T
ME/ T calculates.
Fig. 3 is the flow chart of expression by the flow process of an example of the main processing of the consumption electric power computational methods of controller 26 realizations.
In step 300, user's input is by the parameter (circulation timei, mould open and close time, metering time etc.) of the molding condition of user interface 35 inputs.
In step 302, read the approximate expression that is contained in approximate expression storage part 262.
In step 304, by consume electric power calculating part 261 with the molding condition of input in the above-mentioned steps 300 as input parameter and the approximate expression that computing is read in above-mentioned steps 302, thereby predictability ground calculates the consumption electric power W of each forming process
1, W
2, W
3, W
4, W
5Deng, and calculate wastage in bulk or weight electric power W
Total
In step 306, by the result of calculation of user interface 35 outputs consumption electric power of calculating in above-mentioned steps 304.The consumption electric power W that also can show at this moment, each forming process respectively
1, W
2, W
3, W
4, W
5Deng result of calculation the time, show wastage in bulk or weight electric power W
TotalResult of calculation.Thus, the user can grasp the consumption electric power when the molding condition of input forms.Therefore, the user observes this result of calculation, for example can rethink molding condition once more and input once more.At this moment, the user can grasp to become which kind of consumption electric power under new molding condition.Adjust molding condition when so, the user can forethought consumes electric power.
In the present embodiment, controller 26 can further possess the best molding condition computing function of calculating the best molding condition of considering consumption electric power.
Fig. 4 is the functional-block diagram of the expression major function portion relevant with the best molding condition computing function of controller 26.
Fig. 5 is the flow chart of expression by the flow process of an example of the main processing of the best molding condition computational methods of controller 26 realizations.
In step 500, user's input is by the restrictive condition of user interface 35 inputs.Restrictive condition can for example be parameter (circulation timei, mould open and close time, metering time etc.) the modifiable scope (higher limit and/or lower limit) for molding condition.For example, about being the scope till T1～T2 circulation timei, about the mould switching time be under the such state of scope till T3～T4, also can be with respect to the admissible scope of molding condition.These modifiable scopes can also be corresponding with the high-quality product condition.That is, the variable scope of molding condition can be set in the scope that satisfies the high-quality product condition.And restrictive condition can comprise the desired value of consumption electric power of each forming process or the desired value of wastage in bulk or weight electric power.
In step 502, read the approximate expression that is contained in approximate expression storage part 262.
In step 504, by best molding condition calculating part 263, search makes the best molding condition that becomes minimum of a value in above-mentioned steps 502 by the consumption electric power of the approximation computing of reading under the restrictive condition of input in above-mentioned steps 500.In addition, in above-mentioned steps 500, when in restrictive condition, comprising the desired value that consumes electric power, by best molding condition calculating part 263, under the restrictive condition of input, search is as becoming the best molding condition below the desired value by the consumption electric power that makes the approximate expression computing of reading in above-mentioned steps 502 in above-mentioned steps 500.At this moment, also can in best molding condition scope, search for best molding condition.
In step 506, export the result of calculation of the best molding condition that in above-mentioned steps 504, calculates by user interface 35.The consumption electric power W that also can show at this moment, each forming process under this best molding condition respectively
1, W
2, W
3, W
4, W
5Deng result of calculation the time, show wastage in bulk or weight electric power W
TotalResult of calculation.Thus, when the user can grasp best molding condition, can grasp the consumption electric power when under this best molding condition, forming.
More than, the preferred embodiments of the present invention are had been described in detail, but the present invention is not limited to the above embodiments, in not departing from the scope of the present invention, can apply various distortion and replacement to the foregoing description.
For example, in the above-described embodiments, controller 26 by injection machine 1 realizes consuming electric power computing function, best molding condition computing function and result of calculation output function, but, consume electric power computing function and/or best molding condition computing function and/or operation result output function and also can pass through outer computer (for example personal computer) realization.At this moment, outer computer also can possess consumption electric power computing function corresponding with multiple injection machine and/or best molding condition computing function.
And in the above-described embodiments, as being calculated by identical approximate expression and add the consumption electric power that formed products ejects the servo motor 44 of operation, also available identical approximation calculation also adds the consumption electric power of other forming processes.
And, in the above-described embodiments, calculate the consumption electric power of each forming process, but also can calculate the consumption electric power of each motor ( servo motor 11,24,42,44 etc.) or each heater by approximate expression.And in the above-described embodiments, the consumption electric power that calculates each forming process is predicted the wastage in bulk or weight electric power in 1 cycle, but the consumption electric power or the wastage in bulk or weight electric power of also measurable combination about certain specific 1 forming process or a plurality of forming processes that certain is specific.And, similarly, the consumption electric power or the wastage in bulk or weight electric power of also measurable combination about certain specific 1 motor or a plurality of motors that certain is specific.And similarly, the consumption electric power or the wastage in bulk or weight electric power of also measurable combination about certain specific 1 heater or a plurality of heaters that certain is specific.
And, be set as change molding condition (in the scope of high-quality product width) if consume the consumption electric power of the unit of electric power maximum in the consumption electric power that will in each unit (each forming process, each motor, each heater), calculate, then can seek to consume electric power effectively and reduce.
Claims (5)
1. one kind consumes the electric power calculation element, is used for injection machine, it is characterized in that possessing:
Input mechanism, the input forming condition;
Storing mechanism, storage are used to calculate the approximate expression of the consumption electric power when making described injection machine work with the molding condition that inputs to this input mechanism; And
Consume the electric power calculation mechanism,, calculate the consumption electric power of described injection machine by the approximate expression that is stored in described storing mechanism according to the molding condition that inputs to described input mechanism.
2. consumption electric power calculation element as claimed in claim 1 also possesses:
Best molding condition calculation mechanism, according to the approximate expression that is stored in described storing mechanism, calculating makes consumption electric power become predetermined value or minimum molding condition under the restrictive condition of the satisfied high-quality product condition of being scheduled to of formed products.
3. consumption electric power calculation element as claimed in claim 1 also possesses:
Output mechanism, the consumption electric power that output calculates by described consumption electric power calculation mechanism.
4. consumption electric power calculation element as claimed in claim 1, wherein,
Be assembled in the injection machine or be assembled in from injection machine independently the outer computer.
5. one kind consumes the electric power computational methods, is used for injection machine, it is characterized in that possessing:
Input step, the input forming condition;
Reading step is read the approximate expression that is used for calculating the consumption electric power when making described injection machine work with the molding condition of importing at described input step from storing mechanism; And
Consume the electric power calculation procedure,, calculate the consumption electric power of described injection machine by described approximate expression of reading according to the molding condition of in described input step, importing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010100290A JP5714838B2 (en) | 2010-04-23 | 2010-04-23 | Power consumption calculation device and power consumption calculation method for injection molding machine |
| JP100290/2010 | 2010-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102233657A true CN102233657A (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100980078A Pending CN102233657A (en) | 2010-04-23 | 2011-04-19 | Computing device of electric power consumption for injection molding machine and computing method of electric power consumption |
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| Country | Link |
|---|---|
| JP (1) | JP5714838B2 (en) |
| CN (1) | CN102233657A (en) |
| DE (1) | DE102011018156A1 (en) |
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|---|---|---|---|---|
| EP3041656B1 (en) | 2013-09-05 | 2021-06-30 | Husky Injection Molding Systems Limited | A method and system for generating, processing and displaying an indicator of performance of an injection molding machine |
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|---|---|---|---|---|
| DE3043369C2 (en) * | 1980-11-17 | 1984-08-23 | Mannesmann Demag Kunstofftechnik Zweigniederlassung der Mannesmann Demag AG, 8500 Nürnberg | A measuring device assigned to an injection molding machine for measuring and displaying the consumption of electrical energy per injection cycle |
| DE10247565A1 (en) * | 2002-03-16 | 2003-10-02 | Karl Hehl | Optimization of cyclical machine processes, particularly on plastics injection machines, involves comparison of energy usage in cycles or part cycles before optimization of set machine parameters |
| CN201220475Y (en) * | 2008-04-25 | 2009-04-15 | 黄邦洪 | Intelligent control electricity economizer special for injection moulding machine |
| CN101484295A (en) * | 2006-07-06 | 2009-07-15 | 克劳斯玛菲科技有限公司 | Apparatus and method for user-specific monitoring and control of production |
Family Cites Families (5)
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| AT401116B (en) * | 1994-06-29 | 1996-06-25 | Battenfeld Kunststoffmasch | Process and apparatus for reducing the required connected power of an electrically driven injection-moulding machine |
| JP3412419B2 (en) * | 1996-10-08 | 2003-06-03 | 宇部興産株式会社 | Method for optimizing molding conditions of injection molding machine |
| JP2007021861A (en) * | 2005-07-15 | 2007-02-01 | Sumitomo Heavy Ind Ltd | Method and device for controlling molding machine |
| JP4436303B2 (en) | 2005-09-20 | 2010-03-24 | 日精樹脂工業株式会社 | Control device for injection molding machine |
| JP5044621B2 (en) * | 2009-09-18 | 2012-10-10 | 日精樹脂工業株式会社 | Control device for injection molding machine |
-
2010
- 2010-04-23 JP JP2010100290A patent/JP5714838B2/en active Active
-
2011
- 2011-04-19 DE DE201110018156 patent/DE102011018156A1/en active Pending
- 2011-04-19 CN CN2011100980078A patent/CN102233657A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3043369C2 (en) * | 1980-11-17 | 1984-08-23 | Mannesmann Demag Kunstofftechnik Zweigniederlassung der Mannesmann Demag AG, 8500 Nürnberg | A measuring device assigned to an injection molding machine for measuring and displaying the consumption of electrical energy per injection cycle |
| DE10247565A1 (en) * | 2002-03-16 | 2003-10-02 | Karl Hehl | Optimization of cyclical machine processes, particularly on plastics injection machines, involves comparison of energy usage in cycles or part cycles before optimization of set machine parameters |
| CN101484295A (en) * | 2006-07-06 | 2009-07-15 | 克劳斯玛菲科技有限公司 | Apparatus and method for user-specific monitoring and control of production |
| CN201220475Y (en) * | 2008-04-25 | 2009-04-15 | 黄邦洪 | Intelligent control electricity economizer special for injection moulding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5714838B2 (en) | 2015-05-07 |
| DE102011018156A8 (en) | 2013-10-24 |
| JP2011230309A (en) | 2011-11-17 |
| DE102011018156A1 (en) | 2011-12-29 |
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Application publication date: 20111109 |