CN1640646A - Frequency transformer and injection moulding machine, and control method of frequency transformer to injection moulding machine - Google Patents
Frequency transformer and injection moulding machine, and control method of frequency transformer to injection moulding machine Download PDFInfo
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- CN1640646A CN1640646A CN 200410015697 CN200410015697A CN1640646A CN 1640646 A CN1640646 A CN 1640646A CN 200410015697 CN200410015697 CN 200410015697 CN 200410015697 A CN200410015697 A CN 200410015697A CN 1640646 A CN1640646 A CN 1640646A
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Abstract
The present invention relates to a frequency converter and injection moulding machine, and a method for utilizing frequency converter to control injection moulding machine. Said invented injection moulding machine include sthe frequency converter and signal converter, the described signal converter can be used for receiving proportional pressure signal and proportional flow signal transferred by PLC programmable controller in injection moulding machine, and utilizing conversion to input said two signals into the described frequency converter, then the frequency converter can be used to control the motor in the injection moulding machine.
Description
Technical field
The present invention relates to a kind of injection machine, relate in particular to a kind of frequency converter and injection machine and frequency converter control method injection machine.
Background technology
At present, for energy savings, producer generally adopts to be installed (adapted) frequency converter additional and realizes this requirement, in the process of using frequency converter to control in the injection moulding industry, the general input of one road signal, pressure signal or the flow signal of adopting of its control signal.And injection machine has several operation process need height to force down stream, the high stream of low pressure, low pressure molding guarantor when producing.Because the input of frequency converter often is the flow signal output that is connected on injection machine, it is to satisfy that the high stream of low pressure, low pressure molding are protected, but when the needs height forces down stream, frequency converter just can not satisfy this moment, because when this low discharge, the frequency converter output frequency is low, can not satisfy the requirement of its output high pressure; If when changing the pressure signal input into, can satisfy height and force down stream, but protect and just can not satisfy for the high stream of low pressure, low pressure molding; The production technology and the product quality of injection moulding producer have so just been influenced.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of frequency converter and injection machine and the frequency converter control method to injection machine, are intended to solve present frequency converter and can not satisfy the defective that height forces down stream, the high stream of low pressure, low pressure molding guarantor simultaneously to the control of injection machine.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
Frequency converter of the present invention comprises control module, first receiving element, arithmetic element, driver element, also comprise second receiving element: first receiving element, arithmetic element, driver element, and second receiving element under the control of control module, first receiving element and second receiving element receive the signal that transmits from signal adapter respectively, by the motor of arithmetic element and driver element control injection machine;
Injection machine of the present invention comprises frequency converter, signal adapter; Signal adapter receives ratio pressure signal and the ratio flow signal that the PLC programmable controller in the injection machine transmits, and by conversion two signals is input in the frequency converter, by the motor in the Frequency Converter Control injection machine;
Frequency converter of the present invention is realized by following steps the control method of injection machine:
Ratio pressure signal that PLC programmable controller in the injection machine is transmitted and ratio flow signal 0-1A or 0-2A by signal adapter be converted to frequency converter the 4-20mA that can receive or the linear analogue signal of 0-10V;
According to ratio pressure and ratio flow different of injection machine under different process and product situation, and the difference of different brands injection machine motor characteristics in actual use, various parameter options set up;
To the two-way analog signal of input, gather the setting value of each parameter options, calculate by the arithmetic element of frequency converter, draw required frequency converter output frequency;
Motor by the control of the driver element in frequency converter injection machine.
Compared with prior art, the invention has the beneficial effects as follows: owing to adopted pressure, the input of flow dual signal and the characteristic control mode of any setting changing on demand, fundamentally solved the deficiency that occurs in several operation processes of the injection machine that causes owing to the mono signal input, it can make the change by above parameter in different manufacturing technique requirents of injection moulding producer, satisfy the control requirement that various modules are produced, finally reach its quality requirement.
Description of drawings
Fig. 1 is the block diagram of frequency converter among the present invention;
Fig. 2 is the block diagram of injection machine among the present invention;
Fig. 3 is a frequency---proportional pressure valve electric current input quantity curve;
Fig. 4 is a frequency---proportional flow control valve electric current input quantity curve;
Fig. 5 is the frequency that flex point is arranged---proportional pressure valve electric current input quantity curve;
Fig. 6 is the frequency that flex point is arranged---proportional flow control valve electric current input quantity curve;
Fig. 7 is a concrete frequency---proportional pressure valve electric current input quantity curve;
Fig. 8 is a concrete frequency---proportional flow control valve electric current input quantity curve;
Fig. 9 is the frequency that negative slope has flex point---proportional pressure valve electric current input quantity curve;
Figure 10 is the frequency that negative slope has flex point---proportional flow control valve electric current input quantity curve;
Wherein: control module 1, the first receiving element 2, arithmetic element 3, driver element 4, the second receiving elements 5, frequency converter 11, signal adapter 12, PLC programmable controller 13, motor 14.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
As seen from Figure 1: frequency converter of the present invention comprises control module 1, the first receiving element 2, arithmetic element 3, and driver element 4 also comprises second receiving element 5; First receiving element 2, arithmetic element 3, driver element 4, and second receiving element 2 under the control of control module 1, first receiving element 2 and second receiving element 5 receive the signal that transmits from signal adapter respectively, by the motor of arithmetic element 3 and driver element 4 control injection machines.
As seen from Figure 2: injection machine of the present invention comprises frequency converter 11, signal adapter 12; Signal adapter 12 receives ratio pressure signal and the ratio flow signal that the PLC programmable controller 13 of injection machines transmits, and by conversion two signals is input in the frequency converter 11, by the motor 14 in the frequency converter 11 control injection machines.
Frequency converter of the present invention is realized by following steps the control method of injection machine:
Ratio pressure signal that PLC programmable controller in the injection machine is transmitted and ratio flow signal 0-1A or 0-2A by signal adapter be converted to frequency converter the 4-20mA that can receive or the linear analogue signal 101 of 0-10V;
According to ratio pressure and ratio flow different of injection machine under different process and product situation, and the difference of different brands injection machine motor characteristics in actual use, various parameter options 102 set up;
To the two-way analog signal of input, gather the setting value of each parameter options, calculate by the arithmetic element of frequency converter, draw required frequency converter output frequency 103; Motor 104 by the control of the driver element in frequency converter injection machine;
According to ratio pressure and ratio flow different of injection machine under different process and product situation, and the difference of different brands injection machine motor characteristics in actual use, set up following parameter options:
| FC230 proportional pressure valve electric current input maximum | Adjusting range: 0.00～1.00 (2.00) | Default value: 1.00 |
| FC231 proportional pressure valve electric current input maximum respective frequencies | Adjusting range: 0.00～highest frequency | Default value: 50.00 |
| FC232 proportional pressure valve electric current input minimum | Adjusting range: 0.00～1.00 | Default value: 0.00 |
| FC233 proportional pressure valve electric current input minimum respective frequencies | Adjusting range: 0.00～highest frequency | Default value: 0.00 |
| FC234 proportional pressure valve electric current input weight coefficient | Adjusting range: 0.00～1.00 | Default value: 0.10 |
| FC235 proportional pressure valve electric current input flex point is selected | Adjusting range: 0,1,2,3 | Default value: 0 |
| FC236 proportional pressure valve electric current | Adjusting range: 0.00～proportional pressure valve electric current input maximum | Default value: 0.00 |
| FC237 proportional pressure valve electric current | Adjusting range: 0.00～proportional pressure valve electric current input maximum respective frequencies | Default value: 0.00 |
| FC238 proportional pressure valve electric current input flex point 2 electric currents | Adjusting range: 0.00～proportional pressure valve electric current input maximum | Default value: 0.00 |
| FC239 proportional pressure valve electric current input flex point 2 respective frequencies | Adjusting range: 0.00～proportional pressure valve electric current input maximum respective frequencies | Default value: 0.00 |
| FC240 proportional flow control valve electric current input maximum | Adjusting range: 0.00～1.00 (2.00) | Default value: 1.00 |
| FC241 proportional flow control valve electric current input maximum respective frequencies | Adjusting range: 0.00～highest frequency | Default value: 50.00 |
| FC242 proportional flow control valve electricity end is gone into minimum | Adjusting range: 0.00～1.00 | Default value: 0.00 |
| FC243 proportional flow control valve electric current input minimum respective frequencies | Adjusting range: 0.00～highest frequency | Default value: 0.00 |
| FC244 proportional flow control valve electric current input weight coefficient | Adjusting range: 0.00～1.00 | Default value: 0.10 |
| FC245 proportional flow control valve electric current input flex point is selected | Adjusting range: 0,1,2,3 | Default value: 0 |
| FC246 proportional flow control valve electric current | Adjusting range: 0.00～proportional flow control valve electric current input maximum | Default value: 0.00 |
| FC247 proportional flow control valve electric current | Adjusting range: 0.00～proportional flow control valve electric current input maximum respective frequencies | Default value: 0.00 |
| FC248 proportional flow control valve electric current input flex point 2 electric currents | Adjusting range: 0.00～proportional flow control valve electric current input maximum | Default value: 0.00 |
| FC249 proportional flow control valve electric current input flex point 2 respective frequencies | Adjusting range: 0.00～proportional flow control valve electric current input maximum respective frequencies | Default value: 0.00 |
Annotate: FC
*Code is convenient and annotate during just for accompanying drawing.
The two-way analog input of selecting frequency converter is effective efficiency simultaneously, the corresponding proportional pressure valve of different set that is worth according to the electric current input quantity maximum (minimum) of the proportional pressure valve of the actual injection machine of client, proportional flow control valve and maximum (minimum) frequency of proportional flow control valve electric current input quantity.Software adopts the method for 2 decision straight lines to determine correspondent frequency---proportional pressure valve electric current input quantity curve (as seen from Figure 3) and frequency---proportional flow control valve electric current input quantity curve (as seen from Figure 4) respectively, it is synthetic that frequency---electric current input quantity curve is at a certain pressure with injection machine, proportional pressure valve electric current that flow is down actual and proportional flow control valve electric current according to Fig. 3 and Fig. 4 calculate corresponding frequency multiply by corresponding weight coefficient more respectively after addition draw the frequency converter frequency that requirement is moved according to actual process, frequency converter removes to drive oil pump motor operation fuel feeding by this frequency, thereby goes to control the action of each executing agency.Because in case according to the injection machine proportional pressure valve, the corresponding proportional pressure valve electric current of the property settings of proportional flow control valve input quantity maximum (minimum) value, after proportional flow control valve electric current input quantity maximum (minimum) is worth pairing maximum (minimum) frequency, what obtain is two straight lines, and proportional pressure valve electric current input weight coefficient and proportional flow control valve electric current input weight coefficient are (" arbitrarily " here are meant according to the technology of production and decide) arbitrarily, after any weighting of process is synthetic, obtain a frequency-electric current input quantity straight line, its slope is along with weighted value and client set injection machine pressure in each course of action, the variation of flow and changing, but all be the straight line that a slope changes arbitrarily howsoever.
In the above table: adjusting range among FC235 and the FC245: 0,1,2,3 are meant that selection " 0 " is not for there being flex point; Selecting " 1 " is first flex point; Selecting " 2 " is second flex point; Select " 3 " for first flex point and second flex point are arranged simultaneously.
Sometimes according to the characteristic different needs conic section of oil pump or the method for operation of other curve, for this reason, employing is in frequency-proportional pressure valve electric current input quantity, increased the setting of flex point function in the curve of frequency-proportional flow control valve electric current input quantity, maximum can be set two flex points, selection by preset proportion pressure (flow) valve flex point input current and its respective frequencies, to have only a frequency-proportional pressure valve electric current input quantity (as seen from Figure 5) originally, the straight line of frequency-proportional flow control valve electric current input quantity (as seen from Figure 6) is divided into three sections, the slope of each section is different, by the setting of weighted value, can synthesize a frequency-electric current input quantity curve that is similar to conic section at last again.
Wherein in step " 102 ": the difference of different brands injection machine motor characteristics, set up various parameter options to be meant the gear pump flex point is selected " 0 "; The vane pump flex point is selected " 3 "; Other oil pump flex point is selected " 1 " or " 2 " or " 3 ";
Wherein the formula in the step " 103 " is as follows:
SETF＝[FC234]×VF+[FC244]×IF
Wherein:
VF---only, determine by parameter F C230 ~ FC239 by the frequency of proportional pressure valve electric current input decision;
IF---only, determine by parameter F C240 ~ FC249 by the frequency of proportional flow control valve electric current input decision;
[FC234]---proportional pressure valve electric current input weight coefficient;
[FC244]---proportional flow control valve electric current input weight coefficient.
For example: in fact in calculating with the magnitude of current (0～1A) linear transformation be (0～5V) voltage, by Fig. 7, Fig. 8 as seen:
If the pressure valve output current is 0.4A (2V) in the real work, the flow valve output current is 0.6A (3V), and [FC234] is made as 0.5, and [FC244] is made as 0.6;
More than two linear equations be:
Y＝(50/4)*X-(50/4)
VF＝(50/4)*2-(50/4)＝50/4＝12.5(HZ)
IF＝(50/4)*3-(50/4)＝100/4＝25(HZ)
SETF＝12.5*0.5+25*0.6＝21.25HZ
Can also pass through FC230 ~ FC249 in addition and set negative slope curve (as seen), so just can satisfy the requirement of various different loads characteristics by Fig. 9, Figure 10.
Claims (5)
1 one kinds of frequency converters comprise control module (1), first receiving element (2), arithmetic element (3), driver element (4); It is characterized in that: also comprise second receiving element (5); Described first receiving element (2), arithmetic element (3), driver element (4), and second receiving element (2) under the control of described control module (1), first receiving element (2) and second receiving element (5) receive the signal that transmits from signal adapter respectively, by the motor of described arithmetic element (3) and driver element (4) control injection machine.
2. an injection machine is characterized in that: comprise frequency converter (11), signal adapter (12); Described signal adapter (12) receives ratio pressure signal and the ratio flow signal that the PLC programmable controller (13) in the injection machine transmits, and by conversion two signals are input in the described frequency converter (11), by the motor (14) in the frequency converter 11 control injection machines.
3. a frequency converter is characterized in that: realize by following steps the control method of injection machine:
Ratio pressure signal that PLC programmable controller in the injection machine is transmitted and ratio flow signal 0-1A or 0-2A by signal adapter be converted to frequency converter the 4-20mA that can receive or the linear analogue signal (101) of 0-10V;
According to ratio pressure and ratio flow different of injection machine under different process and product situation, and the difference of different brands injection machine motor characteristics in actual use, various parameter options (102) set up;
To the two-way analog signal of input, gather the setting value of each parameter options, calculate by the arithmetic element of frequency converter, draw required frequency converter output frequency (103);
Motor (104) by the control of the driver element in frequency converter injection machine.
4. frequency converter according to claim 3 is to the control method of injection machine: it is characterized in that: in step " 102 ": the difference of different brands injection machine motor characteristics, and set up various parameter options to be meant the gear pump flex point is selected " 0 "; The vane pump flex point is selected " 3 "; Other oil pump flex point is selected " 1 " or " 2 " or " 3 ".
5. according to claim 3 or the 4 described frequency converters control method to injection machine: it is characterized in that: wherein the formula in the step " 103 " is as follows;
SETF＝[FC234]×VF+[FC244]×IF
Wherein:
VF---only, determine by parameter F C230 ~ FC239 by the frequency of proportional pressure valve electric current input decision;
IF---only, determine by parameter F C240 ~ FC249 by the frequency of proportional flow control valve electric current input decision;
[FC234]---proportional pressure valve electric current input weight coefficient;
[FC244]---proportional flow control valve electric current input weight coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410015697 CN1640646A (en) | 2004-01-08 | 2004-01-08 | Frequency transformer and injection moulding machine, and control method of frequency transformer to injection moulding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410015697 CN1640646A (en) | 2004-01-08 | 2004-01-08 | Frequency transformer and injection moulding machine, and control method of frequency transformer to injection moulding machine |
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| Publication Number | Publication Date |
|---|---|
| CN1640646A true CN1640646A (en) | 2005-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410015697 Pending CN1640646A (en) | 2004-01-08 | 2004-01-08 | Frequency transformer and injection moulding machine, and control method of frequency transformer to injection moulding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514165A (en) * | 2012-01-04 | 2012-06-27 | 东莞市吉创自动化设备有限公司 | Connecting device between injection molding machine controller and servo oil pump driver |
| CN106079337A (en) * | 2016-06-01 | 2016-11-09 | 广州能之原科技股份有限公司 | A kind of servo transformation pressure flow signal conversion method and system |
-
2004
- 2004-01-08 CN CN 200410015697 patent/CN1640646A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514165A (en) * | 2012-01-04 | 2012-06-27 | 东莞市吉创自动化设备有限公司 | Connecting device between injection molding machine controller and servo oil pump driver |
| CN106079337A (en) * | 2016-06-01 | 2016-11-09 | 广州能之原科技股份有限公司 | A kind of servo transformation pressure flow signal conversion method and system |
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