CN102744845A - High-precision injection moulding machine for optical-grade transparent product - Google Patents
High-precision injection moulding machine for optical-grade transparent product Download PDFInfo
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- CN102744845A CN102744845A CN2012102409930A CN201210240993A CN102744845A CN 102744845 A CN102744845 A CN 102744845A CN 2012102409930 A CN2012102409930 A CN 2012102409930A CN 201210240993 A CN201210240993 A CN 201210240993A CN 102744845 A CN102744845 A CN 102744845A
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Abstract
The invention provides a high-precision injection moulding machine for an optical-grade transparent product, belongs to the technical field of injection moulding machines, and solves the problem of being low in precision of the conventional injection moulding machine. The high-precision injection moulding machine for the optical-grade transparent product, disclosed by the invention, comprises a temperature control system; the temperature control system comprises a plurality of sub-systems independently with one another; each sub-system comprises a PID (Proportion Integration Differentiation) operation module, a temperature detection sensor, a control module, a group of heating modules and a water flow control valve; the temperature detection sensor is used for detecting a temperature value at a position where the temperature detection sensor is located and outputting the temperature value to the PID operation module; and the PID operation module is used for carrying out PID calculation according to deviation between the detected temperature value and a preset value so as to output control signals to the control module. The high-precision injection moulding machine disclosed by the invention is used for respectively controlling the heating modules and cooling modules by arranging the heating modules and the cooling modules controlled by water flow valves at different positions in the cavity of the injection moulding machine through the plurality of PID operation modules independently with one another, so that the injection moulding machine can be heated relatively precisely.
Description
Technical field
The present invention relates to the injection machine technical field, relate in particular to a kind of optical-grade transparent goods and use high-accuracy injection machine.
Background technology
The injection mo(u)lding scheme of existing preparation high accuracy plastic products has multiple, and comparatively common is the Outshooting compression shaping technology.The Outshooting compression shaping technology is with being expelled in the stainless steel mould through the plastics that are heated as fluid, at heating and pressurizing condition compacted under, can obtaining required plastic part after open mould behind the cooling curing.Yet when utilizing Outshooting compression shaping technology preparation high accuracy plastic products, have following shortcoming: (1) ejection formation thickness is wayward; (2) contraction and the warpage issues during moulding is wayward.The main cause that causes above-mentioned shortcoming is that mold heated is uneven, inhomogeneous, the heating and temperature control inaccuracy.
Summary of the invention
Technical problem to be solved by this invention is; A kind of optical-grade transparent goods of above-mentioned not enough proposition to prior art are used high-accuracy injection machine; It comprises temperature control system; Said temperature control system comprises a plurality of subsystems independent of each other, and each subsystem comprises a PID computing module, a temperature detection sensor, a control module, one group of heating module and a discharge control valve; Said temperature detection sensor and heating module are arranged at positions different in the injection machine mold cavity; Said temperature detection sensor detects the temperature value of its present position and exports this detected temperatures value to the PID computing module; Thereby said PID computing module carries out ratio, integration, differential calculation according to the deviation of detected temperatures value and setting value outputs control signals to control module, and said control module is according to the closure or openness of said control signal control heating module closure or openness and control discharge control valve.
Further, said injection machine also comprises low speed oil return control system, and said low speed oil return control system comprises injection cylinder, first solenoid directional control valve, fuel tank, adjustable damping, fixedly damping, second solenoid directional control valve and pressure inserted valve; Said adjustable damping is connected to the second reversal valve other end with fixedly a parallelly connected setting of damping and an end and is connected to the pressure inserted valve; When said first solenoid directional control valve starts; Injection oil is back to the pressure inserted valve through behind the injection cylinder; If second solenoid directional control valve does not start; Then injection oil is back to fuel tank via the pressure inserted valve, if second solenoid directional control valve starts, then the pressure relieving injection oil that produces after parallelly connected with fixing damping according to adjustable damping of pressure inserted valve flow to the speed of fuel tank.
Further, said low speed oil return control system also comprises first pressure sensor and second pressure sensor; Return pressure when the return pressure when said first pressure sensor is used to detect second reversal valve and does not start, said second pressure sensor are used to detect second reversal valve and start.
Further, said injection machine also comprises the high accuracy injecting systems, and said high accuracy injecting systems comprises nozzle, injection rubber melting cylinder flange, injection rubber melting cylinder, injecting piston rod, adpting flange, rubber melting cylinder flange, rubber melting cylinder and screw rod; Rubber melting cylinder is fixedly connected with the injection rubber melting cylinder said adpting flange and said rubber melting cylinder is not in same horizontal plane with the injection rubber melting cylinder; Said injection rubber melting cylinder flange is fixedly connected nozzle with the injection rubber melting cylinder, and said nozzle is in same horizontal plane with the injection rubber melting cylinder.
Further, said screw rod is inserted in the material plasticizing that is used in the rubber melting cylinder rubber melting cylinder, and the material after the plasticizing gets into the injection rubber melting cylinder through adpting flange; Said injecting piston rod is inserted in and is used in the injection rubber melting cylinder plastifying material in the injection rubber melting cylinder is gone out through the nozzle high-pressure injection.
Further, said high accuracy injecting systems also comprises injecting piston rod positioning control module; Said injecting piston rod positioning control module comprises displacement transducer, control module and driving element; Said displacement transducer detects the position of injecting piston rod and exports this detection position signal to control module; Said control module carries out ratio, integration, differentiates and outputs control signals to driving element according to the deviation of desired location and detection position, and said driving element drives injecting piston rod and is positioned to desired location.
Further, said high accuracy injecting systems is installed on the frame through linear slide rail, and said injecting systems both sides all are fixedly connected with to penetrate moves oil cylinder.
The refrigerating module that the present invention is provided with heating module and is controlled by the current metered valve through diverse location in the injection machine mold cavity; And control those heating modules and refrigerating module respectively through a plurality of PID computing modules independent of each other, make that the injection machine heating is more accurate.The present invention simultaneously also is provided with the accuracy that low speed oil return system and high-accuracy injecting systems are further strengthened injection machine of the present invention.
Description of drawings
Fig. 1 is the schematic block circuit diagram of optical-grade transparent goods of the present invention with high-accuracy injection machine temperature control system;
Fig. 2 is low speed oil return control system principle sketch map of the present invention;
Fig. 3 is the structural representation of optical-grade transparent goods of the present invention with injecting systems in the high-accuracy injection machine;
Fig. 4 is the principle schematic of the injecting piston rod positioning control module in the injecting systems among Fig. 3;
Fig. 5 is arranged at the structural representation on the frame for injecting systems among Fig. 3.
The specific embodiment
Below be specific embodiment of the present invention and combine accompanying drawing, technical scheme of the present invention is done further to describe, but the present invention is not limited to these embodiment.
Please with reference to Fig. 1, Fig. 1 is the schematic block circuit diagram of optical-grade transparent goods of the present invention with high-accuracy injection machine temperature control system.Temperature control system comprises a plurality of PID computing modules, control module, organizes heating module, a plurality of current metered valve and a plurality of temperature detection sensor more.Every group of heating module comprises heating element heater, every group of corresponding temperature detection sensor of heating module, a discharge control valve and a PID computing module.
Among the present invention, organize heating module and a plurality of temperature detection sensor is distributed in positions different in the injection machine mold cavity more.Choosing according to the difference of mold cavity structure and shape of product and difference of position, preferably, at the mold cavity two ends, mid point and each depression or protrusion place be provided with heating module and temperature detection sensor.
The discharge control valve in order to the discharge of control water-cooling channel to reduce the temperature of mold cavity diverse location.
One group of heating module, a temperature detection sensor, a discharge control valve and a PID computing module constitute the sub-systems in the temperature control system.In subsystem; When temperature detection sensor detects dut temperature and departs from desired value; Thereby the PID computing module carries out ratio, integration, differentiates and export control signal to control module according to the deviation of detection signal and set-point, and control module returns to set-point according to the closed heating module switch of control signal or the flow control valve of fetching boiling water to impel detected value.
Scale operation is meant the proportionate relationship of output controlled quentity controlled variable and deviation.Scale parameter is set big more, and the sensitivity of control is low more, and setting value is more little, and the sensitivity of control is high more.The purpose of integral operation is to eliminate deviation, as long as deviation exists, integral action moves controlled quentity controlled variable to the direction that deviation is eliminated.Be the unit of expression integral action intensity the time of integration.The time of integration of setting is short more, and integral action is strong more.Scale operation and integral operation are to control result's corrective action, respond slower.Differentiate is to replenish for the shortcoming of eliminating scale operation and integral operation.The differential action is revised output quantity according to the speed that deviation produces, and makes control procedure return to original state of a control as early as possible, and be the unit of the expression differential action intensity derivative time, and derivative time is long more, and is then strong more with the correction of the differential action.
Among the present invention; Each temperature control subsystem is independently of one another; The pid value and the temperature given value of the PID computing module through setting each sub-systems respectively; Make optical-grade transparent goods of the present invention with high-accuracy injection machine in when heating, mold temperature all can be controlled in the positive and negative 3 ℃ error of setting value in 60 ℃ to 1300 ℃ scopes, makes the repeatability precision of injection machine reach 0.03%.
Further, under the prerequisite that satisfies the product precision, optical-grade transparent goods of the present invention also provide low speed oil return control system with high-accuracy injection machine, the demand of the high stability when this system can satisfy some high-end product injection mo(u)lding, Ultra-Low Speed injection.Please with reference to Fig. 2, Fig. 2 is low speed oil return control system principle sketch map of the present invention.Among Fig. 2, low speed oil return control system comprises injection cylinder 1, first solenoid directional control valve 2, fuel tank 5, adjustable damping 6, fixedly damping 7, second solenoid directional control valve 8 and pressure inserted valve 9.Adjustable damping 6 is connected to second reversal valve 8 with fixedly damping 7 parallelly connected settings and an end, and the other end is connected to pressure inserted valve 9.Preferably, can comprise that also unilateral initiative valve 4 is used to start first reversing solenoid valve 2.
When the injection machine action of injection started, first solenoid directional control valve 2 got electric, and injection oil is by being back to pressure inserted valve 9 through behind the injection cylinder 1; At this moment, if do not start second solenoid directional control valve 8, then pressure inserted valve 9 does not produce resistance, and injection oil directly is back to fuel tank 5 through pressure inserted valve 9; If start second solenoid directional control valve 8; Then because adjustable damping 6 makes pressure inserted valve 9 have a steady pressure with the effect of parallelly connected damping 7; And this steady pressure can be adjusted through adjustment adjustable damping 6, is back to the then slow oil return under the effect of this pressure of injection oil of pressure inserted valve 9 at this moment by injection cylinder 1, has guaranteed that also injection cylinder 1 has a constant resistance when moving ahead simultaneously; Thereby make injection process stable and slow, satisfy process requirements.
Further; For the return pressure under the real-time detection different operating state; In the present embodiment; Comprise that also first pressure sensor 10 and second pressure sensor, 3, the first pressure sensors 10 are used to detect the return pressure when second reversing solenoid valve 8 does not start, second pressure sensor 3 is used to detect the return pressure when second reversing solenoid valve 8 starts.
The present invention is a precision of further strengthening injection machine, after adopting the control of said temperature precision, low speed oil return mode, also comprises the high accuracy injecting systems.Please with reference to Fig. 3, Fig. 4, Fig. 3 is the structural representation of optical-grade transparent goods of the present invention with injecting systems in the high-accuracy injection machine, and Fig. 4 is the principle schematic of the injecting piston rod positioning control module in the injecting systems among Fig. 3.Among Fig. 3, injecting systems 1000 comprises nozzle 100, injection colloidal sol drum flange 200, injection rubber melting cylinder 300, injecting piston rod 400, adpting flange 500, rubber melting cylinder flange 600, rubber melting cylinder 700 and screw rod 800.Adpting flange 500 is used for rubber melting cylinder 700 is fixedly connected with injection rubber melting cylinder 300, and rubber melting cylinder 700 is not in same horizontal plane with injection rubber melting cylinder 300; Injection rubber melting cylinder flange 200 is used for nozzle 100 is fixedly connected with injection rubber melting cylinder 300, and nozzle 100 is in same horizontal plane with injection rubber melting cylinder 300.
The rubber melting cylinder 700 and the screw rod 800 that will be used for plastifying material were opened design in 400 minutes with injection rubber melting cylinder that is used to inject 300 and injecting piston rod, thereby the weight that can reduce injection member reduces the inertia effects when injecting, and makes injection volume more accurate.
Please with reference to Fig. 4, the displacement when controlling injecting piston rod 400 injections, the present invention also is provided with injecting piston rod positioning control module.Injecting piston rod positioning control module comprises displacement transducer 401, control module 402 and driving element 403.Among the present invention; Control module 402 adopts the PID s operation control; When displacement transducer 401 detects current location and departs from desired location; Control module 402 carries out ratio, integration, differentiates and outputs control signals to driving element 403 according to setting value and detected value, and driving element 403 drives injecting piston rod 400 and accurately locatees.The principle of the PID computing module in ratio, integration, the principle of differentiating and the above-mentioned temperature control system is identical, repeats no more at this.
Please with reference to Fig. 5, Fig. 5 is arranged at the structural representation on the frame for injecting systems among Fig. 3.Injecting systems 1000 is installed on the frame 2000 through linear slide rail 4000, and injecting systems 1000 both sides all are fixedly connected with dijection and move oil cylinder 3000.When dijection moves oil cylinder 3000 and cooperates linear slide rails 4000 to make the injecting systems transmission steadily, the shift position is accurate.And dijection moves oil cylinder 3000 can keep nozzle and die feeding mouth contact-making surface when injecting systems 1000 high-pressure injections enough pressure, makes injecting systems have enough sealings.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (7)
1. optical-grade transparent goods are used high-accuracy injection machine; It is characterized in that: comprise temperature control system; Said temperature control system comprises a plurality of subsystems independent of each other, and each subsystem comprises a PID computing module, a temperature detection sensor, a control module, one group of heating module and a discharge control valve; Said temperature detection sensor and heating module are arranged at positions different in the injection machine mold cavity; Said temperature detection sensor detects the temperature value of its present position and exports this detected temperatures value to the PID computing module; Thereby said PID computing module carries out ratio, integration, differential calculation according to the deviation of detected temperatures value and setting value outputs control signals to control module, and said control module is according to the closure or openness of said control signal control heating module closure or openness and control discharge control valve.
2. a kind of optical-grade transparent goods as claimed in claim 1 are used high-accuracy injection machine; It is characterized in that: said injection machine also comprises low speed oil return control system, and said low speed oil return control system comprises injection cylinder, first solenoid directional control valve, fuel tank, adjustable damping, fixedly damping, second solenoid directional control valve and pressure inserted valve; Said adjustable damping is connected to the second reversal valve other end with fixedly a parallelly connected setting of damping and an end and is connected to the pressure inserted valve; When said first solenoid directional control valve starts; Injection oil is back to the pressure inserted valve through behind the injection cylinder; If second solenoid directional control valve does not start; Then injection oil is back to fuel tank via the pressure inserted valve, if second solenoid directional control valve starts, then the pressure relieving injection oil that produces after parallelly connected with fixing damping according to adjustable damping of pressure inserted valve flow to the speed of fuel tank.
3. a kind of optical-grade transparent goods as claimed in claim 2 are used high-accuracy injection machine, it is characterized in that: said low speed oil return is controlled system and is also comprised first pressure sensor and second pressure sensor; Return pressure when the return pressure when said first pressure sensor is used to detect second reversal valve and does not start, said second pressure sensor are used to detect second reversal valve and start.
4. according to claim 1 or claim 2 a kind of optical-grade transparent goods are used high-accuracy injection machine; It is characterized in that: said injection machine also comprises the high accuracy injecting systems, and said high accuracy injecting systems comprises nozzle, injection rubber melting cylinder flange, injection rubber melting cylinder, injecting piston rod, adpting flange, rubber melting cylinder flange, rubber melting cylinder and screw rod; Rubber melting cylinder is fixedly connected with the injection rubber melting cylinder said adpting flange and said rubber melting cylinder is not in same horizontal plane with the injection rubber melting cylinder; Said injection rubber melting cylinder flange is fixedly connected nozzle with the injection rubber melting cylinder, and said nozzle is in same horizontal plane with the injection rubber melting cylinder.
5. a kind of optical-grade transparent goods as claimed in claim 4 are used high-accuracy injection machine, it is characterized in that: said screw rod is inserted in the material plasticizing that is used in the rubber melting cylinder rubber melting cylinder, and the material after the plasticizing gets into the injection rubber melting cylinder through adpting flange; Said injecting piston rod is inserted in and is used in the injection rubber melting cylinder plastifying material in the injection rubber melting cylinder is gone out through the nozzle high-pressure injection.
6. a kind of optical-grade transparent goods as claimed in claim 5 are used high-accuracy injection machine, it is characterized in that: said high accuracy injecting systems also comprises injecting piston rod positioning control module; Said injecting piston rod positioning control module comprises displacement transducer, control module and driving element; Said displacement transducer detects the position of injecting piston rod and exports this detection position signal to control module; Said control module carries out ratio, integration, differentiates and outputs control signals to driving element according to the deviation of desired location and detection position, and said driving element drives injecting piston rod and is positioned to desired location.
7. a kind of optical-grade transparent goods as claimed in claim 5 are used high-accuracy injection machine, it is characterized in that: said high accuracy injecting systems is installed on the frame through linear slide rail, and said injecting systems both sides all are fixedly connected with to penetrate moves oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210240993.0A CN102744845B (en) | 2012-07-04 | 2012-07-04 | High-precision injection moulding machine for optical-grade transparent product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210240993.0A CN102744845B (en) | 2012-07-04 | 2012-07-04 | High-precision injection moulding machine for optical-grade transparent product |
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| CN102744845B CN102744845B (en) | 2014-12-10 |
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Cited By (4)
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| CN105538632A (en) * | 2014-10-27 | 2016-05-04 | 日精树脂工业株式会社 | Temperature control device of injection molding machine |
| CN108454049A (en) * | 2017-02-17 | 2018-08-28 | 株式会社松井制作所 | Pressure control device |
| CN110001019A (en) * | 2018-10-01 | 2019-07-12 | 中原大学 | Injection molding equipment |
| CN110196553A (en) * | 2019-06-05 | 2019-09-03 | 江苏拓米洛环境试验设备有限公司 | Chamber with dynamic heat load runs control method and device when high temperature and humidity |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538632A (en) * | 2014-10-27 | 2016-05-04 | 日精树脂工业株式会社 | Temperature control device of injection molding machine |
| CN105538632B (en) * | 2014-10-27 | 2018-12-07 | 日精树脂工业株式会社 | The temperature control equipment of injection (mo(u)lding) machine |
| CN108454049A (en) * | 2017-02-17 | 2018-08-28 | 株式会社松井制作所 | Pressure control device |
| CN108454049B (en) * | 2017-02-17 | 2022-03-29 | 株式会社松井制作所 | Pressure control device |
| CN110001019A (en) * | 2018-10-01 | 2019-07-12 | 中原大学 | Injection molding equipment |
| CN110196553A (en) * | 2019-06-05 | 2019-09-03 | 江苏拓米洛环境试验设备有限公司 | Chamber with dynamic heat load runs control method and device when high temperature and humidity |
| CN110196553B (en) * | 2019-06-05 | 2022-02-18 | 江苏拓米洛环境试验设备有限公司 | Control method and device for high-temperature and high-humidity running of test box with dynamic thermal load |
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