CN205601118U - Control system of injection mold and control mold die cavity pressure - Google Patents
Control system of injection mold and control mold die cavity pressure Download PDFInfo
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- CN205601118U CN205601118U CN201620368100.4U CN201620368100U CN205601118U CN 205601118 U CN205601118 U CN 205601118U CN 201620368100 U CN201620368100 U CN 201620368100U CN 205601118 U CN205601118 U CN 205601118U
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Abstract
The utility model discloses a control system of injection mold and control mold die cavity pressure, two sets of gas passages in the mould have realized independent closed -loop control, one of them cover passageway with the edge of injection mold die cavity, fill the end, muscle post end links to each other with external gas control device, one set other passageway links to each other the movable mould side wall surface of injection mold die cavity with external gas control device. Every set of gas passage gas accuse relief pressure valve control intake pressure through having electron pressure controller when admitting air passes through the controllable vacuum pump auxiliary gas of the velocity of flow and discharges when the exhaust. Mould cavity internal pressure's in the production process of moulding plastics accurate control can be accomplished to two sets of gas passage interoperations, and puies forward homogeneity and stability that high pressure distributes simultaneously. The utility model discloses can be used to the short method microcellular foam shooting technique of penetrating, the no craze in production surface, still hole and the small compact product of inside abscess still can be used to supplementary shooting technique of gaseous back pressure and outside gas and assist the shooting technique.
Description
Technical field
This utility model relates to a kind of molding mold cavity pressure control equipment, particularly to a kind of injection mold comprising double gas passage and the external gas pressure control system.
Background technology
In many Shooting Techniques, such as constructional foaming injection, multi component injection molding, reaction injection molding(RIM), aerofluxus injection, fretting map injection, gas aided injection mould, Vibration Injection Molding, micro-injection etc., in production process, the pressure direct relation in mold cavity the quality of final products, including product size precision, surface gloss, product mechanical property, Foamed article inner cell pattern etc..The control of cavity pressure becomes key one ring of injection molding of polymers production technology, more accurately, stable and sensitive Cold hobbing technology also obtain extensive concern.
Shandong University disclosed the patented technology of a kind of entitled " molding mold cavity control pressurer system and control method " (publication number: CN 201210517381.1) in 2012 in China.This technology uses a set of gas passage to control the turnover of gas in molding mold cavity, and gas discharges power resources in die cavity and barometric pressure difference, and when cavity pressure is relatively low, gas discharge efficiency is relatively low, and pressure declines the slowest.Qingdao HaiXin Molds Co., Ltd disclosed the patented technology of a kind of entitled " molding mold cavity control pressurer system " (publication number: CN 201420217881.8) in 2014 in China.This technology uses a set of gas passage to control the turnover of gas in molding mold cavity equally, but is able to make the gas in mold cavity discharge mold cavity more quickly, up hill and dale, and pressure relief pipe end adds vacuum pump and accelerates pressure release.But this technology can only meet the quick response of plastic edge or muscle post terminal pressure, and other positions of plastic still exist the phenomenon of pressure change response lag.This is to be determined by the fluid behaviour of die cavity interpolymer melt, highly viscous polymer melt makes pressure transmission slow, thus easily generation type intracavity polymer melt pressure distribution is uneven, cause product cooling meat inequality, mechanical property inequality, the unequal problem of Mass Distribution.For Foamed article, also result in inner cell topographic profile uneven.Zhejiang Polytechnical University disclosed the patented technology of a kind of entitled " extraneous gas aided injection mould mould " (publication number: CN 201410327234.7) in 2014 in China.This technology is provided with air inlet duct and air discharge duct in injection mold, and air inlet duct is by air tube by mold cavity and trachea UNICOM, and the finally filled position of melt in described mold cavity is located in the position of air discharge duct.Although this technology devises two set gas pipings in injection mold, but the most a set of gas discharge being only used for the last filling position of melt in die cavity, it is not directed to the control method of gas discharge process, still cannot ensure that melt is finally filled region and melt and had been filled with the pressure uniformity in region.
Utility model content
In place of this utility model is according to above-mentioned the deficiencies in the prior art, a kind of dual pathways molding mold cavity compress control method proposed, and the mould of built-in two set gas passages and extraneous gas conveying, control pressurer system.By closed loop pressure control strategy and two set gas passage interoperations, complete to be molded mold cavity internal pressure in production process be precisely controlled with sensitive accordingly, and improve uniformity and the stability of pressure distribution simultaneously.
For achieving the above object, this utility model adopts the following technical scheme that.
A kind of molding mold cavity control pressurer system, including a gas source, air compressor and controller, described gas source outlet is connected with the entrance of supercharging equipment, it is that mold cavity supplies gases at high pressure that the outfan of supercharging equipment is divided into the gas circuit that two-way independently controls, air compressor will be stored into after air pressurized in air bottle, the outfan of air bottle is divided into two-way, compressed air is transported in supercharging equipment by one tunnel by low pressure line, and low pressure line of separately leading up to supplies for each valve after being sequentially connected with pressure maintaining valve and the 3rd Pressure gauge；Described controller connects control system for shot machine and receives injection machine actuating signal, and controller is by pressure transducer detection mold cavity dynamic model side and mold cavity edge pressure signal, and then realizes the control to system.
In the gas circuit that described two-way independently controls, pressure duct of wherein leading up to is sequentially connected with product thickness direction gas turnover main line entrance in first manual stop valve, the first Air pressure control release valve, the first pneumatic stopping valve, the first Pressure gauge, the first filter and mould；Pressure duct of separately leading up to is sequentially connected with the second hand stop valve, the second Air pressure control release valve, the second pneumatic stopping valve, the second Pressure gauge, the second filter and mold cavity product edge gas turnover main line entrance.
Further, the pipeline between the first Pressure gauge and the first pneumatic stopping valve has a branch, is sequentially connected with the 3rd pneumatic stopping valve, the first vacuum pump and the first acoustic filter.
Further, the pipeline between the second Pressure gauge and the second pneumatic stopping valve has a branch, is sequentially connected with the 4th pneumatic stopping valve, the second vacuum pump and the second acoustic filter.
Further, the outfan of an air bottle wherein road is after the 3rd Pressure gauge, and low-pressure gas pipeline is divided into six tunnels；The first via is sequentially connected with the first electronic pressure controller and the first Air pressure control release valve；Second tunnel is sequentially connected with the second electronic pressure controller and the second Air pressure control release valve；3rd tunnel is sequentially connected with the first electromagnetic valve and the first pneumatic stopping valve；4th tunnel is sequentially connected with the second electromagnetic valve and the second pneumatic stopping valve；5th tunnel is sequentially connected with the 3rd electromagnetic valve and the 3rd pneumatic stopping valve；6th tunnel is sequentially connected with the 4th electromagnetic valve and the 4th pneumatic stopping valve.
Further, described controller is PLC module, it is connected with touch screen by data wire, touch screen is built-in control interface program, PLC connects the first electronic pressure controller, the second electronic pressure controller, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the first vacuum pump and the second vacuum pump, to its output action signal.
Further, described Air pressure control release valve and electronic pressure controller are that this system provides the capital equipment of steady pressure source of the gas to mold cavity, Air pressure control release valve utilizes low-pressure gas to control gases at high pressure, it is achieved decompression and the voltage stabilizing to gases at high pressure, pressure control range is preferably 4～25MPa；The pressure control range of electronic pressure controller is preferably 0.1～0.8MPa.
Further, described vacuum pump is arranged at pressure duct air exit.
Further, described gases at high pressure include but not limited to N2Deng gas.
The mould that in a kind of injection moulding process, cavity pressure is controlled, including being sequentially connected the composition centring ring of mould form frame system, top clamping plate, connecting plate, impression bolster, cavity plate, core plate, core fixing plate, cushion block and Bottom clamp plate；Described cavity plate and core plate form mold cavity；Running gate system is through centring ring, top clamping plate, connecting plate, impression bolster, cavity plate and mold cavity UNICOM；Core fixing plate is provided with product thickness direction gas turnover main line and product thickness direction gas turnover bye-pass, described bye-pass connects with main line, ventilating mechanism is installed in described core plate, connects product thickness direction gas turnover bye-pass and communicated with mold cavity by ventilating mechanism；
Described core fixing plate is provided with insert block mechanism, and the assemblage gap of insert structure allows gas into mold cavity, product edge gas turnover bye-pass pass-through central layer, die cavity edge is connected with main line with insert gap.
Further, first pressure transducer is arranged in core plate and core fixing plate, its probe is with mold cavity dynamic model side wall surface at same plane, and the second pressure transducer is arranged in core plate and core fixing plate, and its probe and product edge gas turnover bye-pass wall are at same plane.
Further, being a space between described cushion block, have the thimble fixed plate being connected with Bottom clamp plate in space, ejector retainner plate fixed plate is connected with ejector retainner plate, and thimble one end is arranged on ejector retainner plate, and the other end arrives mold cavity through core fixing plate, core plate.
Further, die joint sealing ring is arranged between cavity plate and core plate, comprises mold cavity and the gas access way on die joint in sealing ring；Ventilating mechanism sealing ring is arranged between core plate and core fixing plate, comprises single ventilating mechanism in sealing ring；Thimble sealing ring is arranged between core fixing plate and core fixing plate, comprises single thimble in sealing ring.
Further, mold cavity pressure control function is completed by the first pressure transducer, the second pressure transducer, product thickness direction gas turnover main line, product thickness direction gas turnover bye-pass, ventilating mechanism, product edge gas turnover main line, product edge gas turnover bye-pass, insert, die joint sealing ring, ventilating mechanism sealing ring, thimble sealing ring and mold exterior gas pressure controlling device.Wherein the first pressure transducer, the second pressure sensor monitoring mold cavity pressure change, pressure measurement range 0～35MPa.Product thickness direction gas turnover main line, product thickness direction gas turnover bye-pass, ventilating mechanism composition mold cavity first set mold cavity gas access way, this set channel system can complete the gas turnover at mold cavity dynamic model side wall surface.Product edge gas turnover main line, product edge gas turnover bye-pass and insert composition mold cavity the second mold type cavity gas access way, this set channel system can complete the gas turnover at mold cavity edge (filling end, reinforcement post end).Die joint sealing ring, ventilating mechanism sealing ring and thimble sealing ring prevent gas in mould template gap respectively, ventilating mechanism assemblage gap, thimble assemblage gap turnover mold cavity.
Further, described ventilating mechanism can be gas injection pin or ventilative steel, and ventilating mechanism quantity does not limits, and quantity and position determine according to the concrete shape of foamed products.
Further, described pressure transducer quantity does not limits, and quantity and particular location determine according to the concrete shape of product.
Further, described running gate system can use hot flow path running gate system, it is also possible to uses cold runner running gate system.
Further, described ejector retainner plate can also be by cylinder or hydraulic oil cylinder driving.
The mold cavity compress control method that this utility model provides, including following particular content:
1. correct time controls.
1) controller reads time delay information and the duration information that control system for shot machine key operations signal and operator set at touch screen；
2) controller sends opening and closing signal on time to electromagnetic valve；Electromagnetic valve can be inflated to pneumatic stopping valve with control piper after receiving signal, thus controls the opening and closing of high-pressure gas pipeline；
3) to be inflated in die cavity by mold cavity dynamic model sidewall, then open the first pneumatic stopping valve, close the 3rd pneumatic stopping valve；To by mold cavity die joint, muscle post end to mould type interacvity air-filling time, then open the second pneumatic stopping valve, close the 4th pneumatic stopping valve；To by mold cavity dynamic model side wall surface outwardly aerofluxus, then close the first pneumatic stopping valve, open the 3rd pneumatic stopping valve, and open the first vacuum pump auxiliary exhaust；To during aerofluxus, then close the second pneumatic stopping valve by mold cavity die joint, muscle post end outside mould, open the 4th pneumatic stopping valve, and open the second vacuum pump auxiliary exhaust；
Air pressure controls the most accurately.
1) supercharging equipment to provide sufficiently high pressure source, the method using air relief valve pressure regulation in pressure duct, controls downstream pressure；
2) controller read operation person is in touch screen setup pressure value and the force value of mould inner pressure sensor feedback, calculates target pressure value, and sends goal pressure value information to electronic pressure controller；
3) the rapid action of electronic pressure controller, controls low-pressure gas air inlet/outlet air relief valve, changes air relief valve output pressure value.When observed pressure value is equal with target pressure value or in range of error, electronic pressure controller quits work, and Air pressure control release valve keeps spool position, maintains outlet pressure stable.
For obtaining high-quality Injection moulded part, needing at least two pressure transducer to detect cavity pressure data, the most most important two positions are the pressure near polymer filling end and dynamic model side Inlet Position.In the charging stage, mold cavity internal pressure controls air pressure by Air pressure control release valve；At exhaust phase, vacuum pump plays main rate of pressure reduction control action.
3. rate of pressure change controls.
1) during air inlet boosting, if needing boosting at a high speed, controller sends signal to electromagnetic valve, open the first pneumatic stopping valve and the second pneumatic stopping valve, simultaneously close off the 3rd pneumatic stopping valve and the 4th pneumatic stopping valve, two-way gases at high pressure simultaneously enter mold cavity, rapidly close to target pressure value from die joint, muscle post end and dynamic model surface of mould cavity；If needing low speed to boost, controller sends signal to electromagnetic method, opens the first pneumatic stopping valve or the second pneumatic stopping valve, simultaneously closes off the 3rd pneumatic stopping valve or the 4th pneumatic stopping valve, and gases at high pressure only enter mold cavity from a set of gas piping.
2) during aerofluxus blood pressure lowering, if needing high speed release, controller sends signal to electromagnetic valve, close the first pneumatic stopping valve and the second pneumatic stopping valve, open the 3rd pneumatic stopping valve and the 4th pneumatic stopping valve simultaneously, it is extraneous that type intracavity gas is discharged to mould from die joint, muscle post end and dynamic model surface of mould cavity simultaneously, and can use the vacuum pump of high pumping rate；If needing low speed release, controller sends signal to electromagnetic valve, closes the first pneumatic stopping valve and the second pneumatic stopping valve, opens the 3rd pneumatic stopping valve or the 4th pneumatic stopping valve, it is extraneous that type intracavity gas is discharged to mould from a set of gas piping, and can use the vacuum pump of low pumping speed.
4, cavity pressure compartmentalization controls.
Different process is different to cavity pressure Spreading requirements, and two set gas pipings can control by closed loop, thus meets multiple gas-assisted injection molding technological requirement.
1) gas back pressure assisted injection molding process, require that ambient atmos passes in and out mold cavity from die joint or muscle post end, now PLC module sends signal to electromagnetic valve, closes the first, the 3rd pneumatic stopping valve, controls the second, the 4th pneumatic stopping valve and controls gas turnover mold cavity；
2) outside gas-assisted injection molding technique, require that ambient atmos is from die cavity dynamic model side wall surface air inlet, from dynamic model side wall surface, die joint and muscle post tail end venting, PLC module controls pneumatic stopping valve by electromagnetic valve, during air inlet, and closedown second and the 3rd pneumatic stopping valve, unlatching first and the 4th pneumatic stopping valve, during aerofluxus, open the third and fourth pneumatic stopping valve, close the first and second stop valves.
3) short method microporous foam Shooting Technique is penetrated, if requiring, ambient atmos is from die cavity dynamic model side wall surface and die joint or muscle post end turnover mold cavity, now PLC module controls pneumatic stopping valve by electromagnetic valve, during air inlet, open the first and second pneumatic stopping valves, close the third and fourth pneumatic stopping valve；When the distribution of die cavity internal gas pressure adjusts, coordinate opening and closing first, second, third, fourth pneumatic stopping valve；During aerofluxus, close the first and second stop valves, close the third and fourth pneumatic stopping valve.
The beneficial effects of the utility model:
Compared with prior art, the controlled mould structure of cavity pressure that this utility model provides and Cold hobbing system are by the separate gas piping of two sets, control gas and pass in and out mold cavity from multiple positions, not only realize more stable, uniform Cold hobbing, and the technology requirement of multiple gases assisted injection molding process can be met.By sensor feedback signal, PLC module coordinates the electronic pressure controller can the accurate gas pressure in control type intracavity gas injection cavity, it is achieved the closed loop of type cavity gas pressure controls, and makes mold cavity internal gas pressure more stable and accurate.The cooperation opening and closing of two circuits and the vacuum pump of exhaustor end, it is achieved that the multistage regulation of decompression rate in die cavity.
Accompanying drawing explanation
Fig. 1 is molding mold cavity control pressurer system schematic diagram of the present utility model.
In figure, 1, source nitrogen；2, supercharging equipment；3, first manual stop valve；4, the second hand stop valve；5, the first Air pressure control release valve；6, the second Air pressure control release valve；7, the first pneumatic stopping valve；8, the second pneumatic stopping valve；9, the 3rd pneumatic stopping valve；10, the 4th pneumatic stopping valve；11, the first Pressure gauge；12, the second Pressure gauge；13, the first filter；14, the second filter；15, the first vacuum pump；16, the first acoustic filter；17, the second vacuum pump；18, the second acoustic filter；19, air compressor；20, air bottle；21, pressure maintaining valve；22, the 3rd Pressure gauge；23, the first electronic pressure controller；24, the second electronic pressure controller；25, the first electromagnetic valve；26, the second electromagnetic valve；27, the 3rd electromagnetic valve；28, the 4th electromagnetic valve；29, PLC module；30, touch screen；31, mould；32, control system for shot machine signal.
Fig. 2 is the mould structure schematic diagram that in injection moulding process of the present utility model, cavity pressure is controlled.
In figure, 33, running gate system；34, centring ring；35, top clamping plate；36, connecting plate；37, impression bolster；38, cavity plate；39, core plate；40, core fixing plate；41, insert；42, cushion block；43, ejector retainner plate fixed plate；44, ejector retainner plate；45, Bottom clamp plate；46, thimble；47, mold cavity；S1, the first pressure transducer；S2, the second pressure transducer；T1, product thickness direction gas turnover main line；T2, product thickness direction gas turnover bye-pass；T3, ventilating mechanism；E1, product edge gas turnover main line；E2, product edge gas turnover bye-pass；M1, die joint sealing ring；M2, ventilating mechanism sealing ring；M3, thimble sealing ring.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
nullAs shown in Figure 1，The molding mold cavity control pressurer system of embodiment includes: source nitrogen 1、Supercharging equipment 2、First manual stop valve 3、Second hand stop valve 4、First Air pressure control release valve 5、Second Air pressure control release valve 6、First pneumatic stopping valve 7、Second pneumatic stopping valve 8、3rd pneumatic stopping valve 9、4th pneumatic stopping valve 10、First Pressure gauge 11、Second Pressure gauge 12、First filter 13、Second filter 14、First vacuum pump 15、First acoustic filter 16、Second vacuum pump 17、Second acoustic filter 18、Air compressor 19、Air bottle 20、Pressure maintaining valve 21、3rd Pressure gauge 22、First electronic pressure controller 23、Second electronic pressure controller 24、First electromagnetic valve 25、Second electromagnetic valve 26、3rd electromagnetic valve 27、4th electromagnetic valve 28、PLC module 29、Touch screen 30、Mould 31 and control system for shot machine signal 32.
Wherein, the outlet of source nitrogen 1 is connected with the entrance of supercharging equipment 2, and the outfan of supercharging equipment 2 is divided into two-way, respectively two set gas passage supply gases at high pressure in mould.Wherein first a road gas passage connects first manual stop valve 3, connects product thickness direction gas turnover main line entrance in first Air pressure control release valve the 5, first pneumatic stopping valve the 7, first Pressure gauge 11 and mould with pressure duct the most successively.Pipeline between the first Pressure gauge 11 and the first pneumatic stopping valve 7 has a branch, is sequentially connected with the 3rd pneumatic stopping valve the 9, first vacuum pump 15 and the first acoustic filter 16.First an other road gas passage connects the second hand stop valve 4, connects second Air pressure control release valve the 6, second pneumatic stopping valve the 8, second Pressure gauge 12 and mold cavity product edge gas turnover main line entrance with pressure duct the most successively.Pipeline between the second Pressure gauge 12 and the second pneumatic stopping valve 8 has a branch, is sequentially connected with the 4th pneumatic stopping valve the 10, second vacuum pump 17 and the second acoustic filter 18.
Further, air compressor 19 will be stored into after air pressurized in air bottle 20, in the range of pressure keeps 0.6～0.8MPa.The outfan of air bottle 20 is divided into two-way, and compressed air is transported in supercharging equipment 2 by a road by low pressure line, and low pressure line of separately leading up to is sequentially connected with pressure maintaining valve 21 and the 3rd Pressure gauge 22.After the 3rd pressure 22 table, low-pressure gas pipeline is divided into six tunnels.The first via is sequentially connected with the first electronic pressure controller 23 and the first Air pressure control release valve 5；Second tunnel is sequentially connected with the second electronic pressure controller 24 and the second Air pressure control release valve 6；3rd tunnel is sequentially connected with the first electromagnetic valve 25 and the first pneumatic stopping valve 7；4th tunnel is sequentially connected with the second electromagnetic valve 26 and the second pneumatic stopping valve 8；5th tunnel is sequentially connected with the 3rd electromagnetic valve 27 and the 3rd pneumatic stopping valve 9；6th tunnel is sequentially connected with the 4th electromagnetic valve 28 and the 4th pneumatic stopping valve 10.
PLC module 29 is connected with touch screen 30 by data wire, touch screen 30 is built-in control interface program.PLC module 29 connects control system for shot machine 32, receive matched moulds terminate, die sinking, the signal such as injection end.The first pressure transducer within PLC module 29 connecting mold and the second pressure transducer, receive mold cavity dynamic model side and mold cavity edge pressure signal respectively.PLC module 29 connects the first electronic pressure controller the 23, second electronic pressure controller the 24, first electromagnetic valve the 25, second electromagnetic valve the 26, the 3rd electromagnetic valve 27 and the 4th electromagnetic valve 28, to its output action signal.PLC module 29 connects the first vacuum pump 15 and the second vacuum pump 17, to its output action signal.
Air pressure control release valve and electronic pressure controller are that this system gas piping in mould provides the main element of steady pressure source of the gas, Air pressure control release valve utilizes low-pressure gas to control gases at high pressure, realize the pressure-reduced and-regulated to gases at high pressure, it is preferred to use Tescom44 series pneumatics load reduction valve；The pressure control range of electronic pressure controller is preferably 0.1～0.8MPa, preferably uses the Tescom ER3000 electronic pressure controller of Emerson company of the U.S..
Described gases at high pressure select N2。
As shown in Figure 2, the injection mold structure of embodiment includes: running gate system 33, centring ring 34, top clamping plate 35, connecting plate 36, impression bolster 37, cavity plate 38, core plate 39, core fixing plate 40, insert 41, cushion block 42, ejector retainner plate fixed plate 43, ejector retainner plate 44, Bottom clamp plate 45, thimble 46, mold cavity 47, first pressure transducer S1, second pressure transducer S2, product thickness direction gas turnover main line T1, product thickness direction gas turnover bye-pass T2, ventilating mechanism T3, product edge gas turnover main line E1, product edge gas turnover bye-pass E2, die joint sealing ring M1, ventilating mechanism sealing ring M2, thimble sealing ring M3.
Wherein, centring ring 34, top clamping plate 35, connecting plate 36, impression bolster 37, cavity plate 38, core plate 39, core fixing plate 40, cushion block 41, Bottom clamp plate 45 are sequentially connected this mold form frame system of composition；Running gate system 33 is through centring ring 34, top clamping plate 35, connecting plate 36, impression bolster 37, cavity plate 38 and mold cavity 47 UNICOM；Ejector retainner plate 44 is connected with Bottom clamp plate 45, and ejector retainner plate fixed plate 43 is connected with ejector retainner plate 44, and thimble 46 is arranged on ejector retainner plate 44；Product thickness direction gas turnover main line T1, product thickness direction gas turnover bye-pass T2, ventilating mechanism T3 are sequentially connected with the first set gas turnover pipeline of composition mold cavity 47, wherein product thickness direction gas turnover main line T1 and product thickness direction gas turnover bye-pass T2 is arranged in core fixing plate 40, ventilating mechanism T3 is arranged in core plate 39, connects product thickness direction gas turnover bye-pass T2 and mold cavity 47；Product edge gas turnover main line E1, product edge gas turnover bye-pass E2 and insert 41 are sequentially connected with the second set gas turnover pipeline of composition mold cavity 47, wherein product edge gas turnover main line E1 is arranged in core fixing plate 40, insert 41 mechanism is arranged in core plate 39, insert 41 assemblage gap allows gas into mold cavity 47, product edge gas turnover bye-pass E2 pass-through central layer 39, connecting mold die cavity 47 edge and insert 41 gap and main line E1；First pressure transducer S1 is arranged in core plate 39 and core fixing plate 40, its probe and mold cavity 47 dynamic model side wall surface are at same plane, second pressure transducer S2 is arranged in core plate 39 and core fixing plate 40, and its probe and product edge gas turnover bye-pass E2 wall are at same plane；Die joint sealing ring M1 is arranged between cavity plate 38 and core plate 39, comprises mold cavity 47 and the gas access way on die joint in sealing ring；Ventilating mechanism sealing ring M2 is arranged between core plate 39 and core fixing plate 40, comprises single ventilating mechanism T3 in sealing ring；Thimble sealing ring M3 is arranged between core plate 39 and core fixing plate 40, comprises single thimble 36 in sealing ring.
Further, described the first pressure transducer S1, the second pressure transducer S2 monitoring mold cavity 47 pressure change, pressure measurement range 0～35MPa.
Further, described first set mold cavity gas access way system can complete the gas turnover at mold cavity 47 dynamic model side wall surface.
Further, the second described mold type cavity gas access way system can complete the gas turnover at mold cavity 47 edge (die joint, muscle post end).
Further, described die joint sealing ring M1, ventilating mechanism sealing ring M2 and thimble sealing ring M3 prevent gas from die clearance respectively, ventilating mechanism assemblage gap, thimble assemblage gap turnover mold cavity 47.
Further, described ventilating mechanism T3 uses gas injection pin.
Further, described running gate system 33 uses hot flow path running gate system.
With several embodiments, this is described in detail below:
Embodiment 1
The work process of gas back pressure assisted injection molding process is:
Step (1), before described device is started working, open the second hand stop valve 4, close first manual stop valve 3, supercharging equipment 2 by the range of source nitrogen 1 boost in pressure to 15～20MPa a certain value time, PLC module 29 sends signal to all electromagnetic valves and vacuum pump, closes all pneumatic stopping valves and vacuum pump.
Step (2), PLC module 29 receives the matched moulds end signal of control system for shot machine 32, sends signal to the second electromagnetic valve 26, opens the second pneumatic stopping valve 8.Gases at high pressure flow out from supercharging equipment 2, through second hand stop valve the 4, second Air pressure control release valve the 6, second pneumatic stopping valve the 8, second Pressure gauge the 12, second filter 14, enter product edge gas turnover main line T1.Gas enters mold cavity 47 by die joint, muscle post end.
Step (3), PLC module 29 receives the monitor value of pressure transducer S1 and S2 in mould and operator in touch screen 30 setup pressure value, calculates target pressure value, and goal pressure value information sends to the second electronic pressure controller 24.Second electronic pressure controller 24 controls low-pressure gas and passes in and out the second Air pressure control release valve 6, adjusts output pressure value.When observed pressure value is equal with target pressure value or in range of error, the second electronic pressure controller 24 quits work, and the second Air pressure control release valve 6 keeps spool position, maintains pressure stability in mold cavity 47.After cavity pressure is stable, PLC module 29 sends signal to the second electromagnetic valve 26, closes the second pneumatic stopping valve 8.
Step (4), the time value that PLC module 29 sets on touch screen 30 according to operator, in polymer melt stowing operation or after sand off, start to shed pressure in die cavity 47.PLC module 29 sends signal to the 4th electromagnetic valve 28 and the second vacuum pump 17, opens the 4th pneumatic stopping valve 10 and the second vacuum pump 17.Gas is discharged E1 by product edge gas turnover main line, discharges through second filter the 14, second Pressure gauge the 12, the 4th pneumatic stopping valve the 10, second vacuum pump the 17, second acoustic filter 18.
Step (5), after injection cooling terminates, PLC module 29 receives the die sinking commencing signal of control system for shot machine 31 and sends signal, recovers pneumatic stopping valve, vacuum pump to step (1) state.
Embodiment 2: the work process of outside gas-assisted injection molding technique is:
Step (1), before described device is started working, open first manual stop valve 3, close the second hand stop valve 4, supercharging equipment 2 by the range of source nitrogen 1 boost in pressure to 15～30MPa a certain value time, PLC module 29 sends signal to all electromagnetic valves and vacuum pump, closes all pneumatic stopping valves and vacuum pump.
Step (2), PLC module 29 receives the signal that the injection of control system for shot machine 32 terminates, sends signal to the first electromagnetic valve 25 and the 4th electromagnetic valve 28, open the first pneumatic stopping valve 7 and the 4th pneumatic stopping valve 10.Gases at high pressure flow out from supercharging equipment 2, through first manual stop valve the 3, first Air pressure control release valve the 5, first pneumatic stopping valve the 7, first Pressure gauge the 11, first filter 13, enter product thickness direction gas turnover main line T1.Gas enters mold cavity 47 by the ventilating mechanism T3 of dynamic model side, forms cavity between polymer melt and core plate 39.Simultaneously, the gas of polymer melt filling end enters product edge gas turnover pipeline E1 through die joint or muscle post end, discharges system through second filter the 14, second Pressure gauge the 12, the 4th pneumatic stopping valve the 10, second vacuum pump the 17, second acoustic filter 18.
Step (3), PLC module 29 receives the monitor value of pressure transducer S1 and S2 in mould and operator in touch screen 30 setup pressure value, calculates target pressure value, and goal pressure value information sends to the first electronic pressure controller 23.First electronic pressure controller 23 controls low-pressure gas and passes in and out the first Air pressure control release valve 5, adjusts output pressure value.When observed pressure value is equal with target pressure value or in range of error, the first electronic pressure controller 23 quits work, and the first Air pressure control release valve 5 keeps spool position, maintains empty cavity pressure stable.After cavity pressure is stable, PLC module 29 sends signal to the first electromagnetic valve 25, closes the first pneumatic stopping valve 7.
Step (4), the time that PLC module 29 sets on touch screen 30 according to operator, after polymer melt cools down a period of time, starts to shed pressure in die cavity 47.PLC module 29 sends signal to the 3rd electromagnetic valve 27 and the first vacuum pump 15, opens the 3rd pneumatic stopping valve 9 and the first vacuum pump 15.Empty intracavity gas is passed in and out main line T1 by product thickness direction gas, discharges through first filter the 13, first Pressure gauge the 11, the 3rd pneumatic stopping valve the 9, first vacuum pump the 15, first acoustic filter 16.
Step (5), after injection mo(u)lding terminates, PLC module 29 receives injection moulding machine mould open commencing signal and sends signal, recovers all pneumatic stopping valves and vacuum pump to step (1) state.
Embodiment 3:
Short penetrate method microporous foam Shooting Technique work process be:
Step (1), before described device is started working, open first manual stop valve 3 and the second hand stop valve 4, supercharging equipment 2 by the range of source nitrogen 1 boost in pressure to 15～30MPa a certain value time, PLC module 29 sends signal to all electromagnetic valves and vacuum pump, closes all pneumatic stopping valves and vacuum pump.
Step (2), PLC module 29 receives the signal that control system for shot machine 32 matched moulds terminates, and sends signal to the first electromagnetic valve 25 and the second electromagnetic valve 26, opens the first pneumatic stopping valve 7 and the second pneumatic stopping valve 8.Gases at high pressure flow out from supercharging equipment 2, and point two-way enters mold cavity 47.One tunnel enters mold cavity 47 through first manual stop valve the 3, first Air pressure control release valve the 5, first pneumatic stopping valve the 7, first Pressure gauge the 11, first filter 13, product thickness direction gas turnover main line T1, the ventilating mechanism T3 of dynamic model side.Another road enters mold cavity 47 through second hand stop valve the 4, second Air pressure control release valve the 6, second pneumatic stopping valve the 8, second Pressure gauge the 12, second filter 14, product edge gas turnover main line E1, die joint and muscle post end.
Step (3), PLC module 29 receives the monitor value of pressure transducer S1 and S2 in mould and operator in touch screen 30 setup pressure value, calculate target pressure value, and goal pressure value information is sent to the first electronic pressure controller 23 and the second electronic pressure controller 24.First electronic pressure controller 23 and the second electronic pressure controller 24 control the first Air pressure control release valve 6 respectively and the second Air pressure control release valve 7 adjusts output pressure value.When observed pressure value is equal with target pressure value or in range of error, first electronic pressure controller 23 and the second electronic pressure controller 24 quit work, first Air pressure control release valve 6 and the second Air pressure control release valve 7 keep spool position, maintain pressure stability in mold cavity 47.After pressure stability, PLC module 29 sends signal to the first electromagnetic valve 25 and the second electromagnetic valve 26, closes the first startup stop valve 9 and the second pneumatic stopping valve 10.
Step (4), PLC module 29 receives the signal that injection machine injection terminates, sends signal to the first electromagnetic valve 25, open the first pneumatic stopping valve 7.Gases at high pressure flow out from supercharging equipment 2, through first manual stop valve the 3, first Air pressure control release valve the 5, first pneumatic stopping valve the 7, first Pressure gauge the 11, first filter 13, enter product thickness direction gas turnover main line T1.Gas enters mold cavity 47 by the ventilating mechanism T3 of dynamic model side, forms cavity between polymer melt and core plate 39.
Step (5), PLC module 29 receives the monitor value of pressure transducer S1 and S2 in mould and operator in touch screen 30 setup pressure value, calculates target pressure value, and goal pressure value information sends to the first electronic pressure controller 23.First electronic pressure controller controls low-pressure gas and passes in and out the first Air pressure control release valve 5, adjusts output pressure value.When observed pressure value is equal with target pressure value or in range of error, the first electronic pressure controller 23 quits work, and the first Air pressure control release valve 5 keeps spool position, maintains empty cavity pressure stable.After cavity pressure is stable, PLC module 29 sends signal to the first electromagnetic valve 25, closes the first pneumatic stopping valve 7.
Step (6), PLC module 29 when operator sets at touch screen 30, sends signal to the 4th electromagnetic valve 28 and the second vacuum pump 17, opens the 4th pneumatic stopping valve 10 and the first vacuum pump 17.Gas in die cavity edge and muscle post cavity, by product edge gas turnover main line E1, is discharged through second filter the 14, second Pressure gauge the 12, the 4th pneumatic stopping valve the 10, first vacuum pump the 17, first acoustic filter 18.
Step (7), PLC module 29 receives the signal that control system for shot machine 32 injection terminates, the time set on touch screen 30 according to operator, after polymer melt cooling certain time, starts to shed pressure in die cavity 47.PLC module 29 sends signal to the 3rd electromagnetic valve 27 and the first vacuum pump 15, opens the 3rd pneumatic stopping valve 9 and the first vacuum pump 15.Empty intracavity gas is passed in and out main line T1 by product thickness direction gas, discharges through first filter the 13, first Pressure gauge the 11, first pneumatic stopping valve the 9, first vacuum pump the 15, first acoustic filter 16.
Step (8), after injection mo(u)lding terminates, PLC module 29 receives injection moulding machine mould open commencing signal and sends signal, recovers all pneumatic stopping valves and vacuum pump to step (1) state.
Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines; but the not restriction to this utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art need not to pay various amendments or deformation that creative work can make still within protection domain of the present utility model.
Claims (10)
1. a molding mold cavity control pressurer system, it is characterized in that, including a gas source, air compressor and controller, described gas source outlet is connected with the entrance of supercharging equipment, and it is mold cavity supply gases at high pressure that the outfan of supercharging equipment is divided into the gas circuit that two-way independently controls；Air compressor will be stored into after air pressurized in air bottle, the outfan of air bottle is divided into two-way, compressed air is transported in supercharging equipment by one tunnel by low pressure line, and low pressure line of separately leading up to supplies for each valve after being sequentially connected with pressure maintaining valve and the 3rd Pressure gauge；Described controller connects control system for shot machine and receives injection machine actuating signal, and controller is by pressure transducer detection mold cavity dynamic model side and mold cavity edge pressure signal, and then realizes the control to system.
2. molding mold cavity control pressurer system as claimed in claim 1, it is characterized in that, in the gas circuit that described two-way independently controls, pressure duct of wherein leading up to is sequentially connected with product thickness direction gas turnover main line entrance in first manual stop valve, the first Air pressure control release valve, the first pneumatic stopping valve, the first Pressure gauge, the first filter and mould, pipeline between the first Pressure gauge and the first pneumatic stopping valve has a branch, is sequentially connected with the 3rd pneumatic stopping valve, the first vacuum pump and the first acoustic filter；Pressure duct of separately leading up to is sequentially connected with the second hand stop valve, the second Air pressure control release valve, the second pneumatic stopping valve, the second Pressure gauge, the second filter and mold cavity product edge gas turnover main line entrance, pipeline between the second Pressure gauge and the second pneumatic stopping valve has a branch, is sequentially connected with the 4th pneumatic stopping valve, the second vacuum pump and the second acoustic filter.
3. molding mold cavity control pressurer system as claimed in claim 1, it is characterised in that the outfan of air bottle, wherein a road is after the 3rd Pressure gauge, and low-pressure gas pipeline is divided into six tunnels；The first via is sequentially connected with the first electronic pressure controller and the first Air pressure control release valve；Second tunnel is sequentially connected with the second electronic pressure controller and the second Air pressure control release valve；3rd tunnel is sequentially connected with the first electromagnetic valve and the first pneumatic stopping valve；4th tunnel is sequentially connected with the second electromagnetic valve and the second pneumatic stopping valve；5th tunnel is sequentially connected with the 3rd electromagnetic valve and the 3rd pneumatic stopping valve；6th tunnel is sequentially connected with the 4th electromagnetic valve and the 4th pneumatic stopping valve.
4. molding mold cavity control pressurer system as claimed in claim 1, it is characterized in that, described controller is PLC module, it is connected with touch screen by data wire, PLC connects the first electronic pressure controller, the second electronic pressure controller, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the first vacuum pump and the second vacuum pump, to its output action signal.
5. the mould that the arbitrary described control system of claim 1-4 matches, it is characterized in that, including being sequentially connected the composition centring ring of mould form frame system, top clamping plate, connecting plate, impression bolster, cavity plate, core plate, core fixing plate, cushion block and Bottom clamp plate；Described cavity plate and core plate form mold cavity；Running gate system is through centring ring, top clamping plate, connecting plate, impression bolster, cavity plate and mold cavity UNICOM；Described cushion block includes two, forming a cavity between two cushion blocks, have the thimble fixed plate being connected with Bottom clamp plate in cavity, ejector retainner plate fixed plate is connected with ejector retainner plate, thimble one end is arranged on ejector retainner plate, and the other end arrives mold cavity through core fixing plate, core plate；Core fixing plate is provided with product thickness direction gas turnover main line and product thickness direction gas turnover bye-pass, described bye-pass connects with main line, ventilating mechanism is installed in described core plate, connects product thickness direction gas turnover bye-pass and communicated with mold cavity by ventilating mechanism；Described core fixing plate is provided with insert block mechanism, and the assemblage gap of insert structure allows gas into mold cavity, connects with main line with insert gap at product edge gas turnover bye-pass pass-through central layer connecting-type cavity edge.
6. mould as claimed in claim 5, it is characterised in that also include the first pressure transducer, the second pressure transducer；First pressure transducer is arranged in core plate and core fixing plate, its probe and mold cavity dynamic model side wall surface are at same plane, second pressure transducer is arranged in core plate and core fixing plate, and its probe and product edge gas turnover bye-pass wall are at same plane.
7. mould as claimed in claim 5, it is characterised in that also include that die joint sealing ring, die joint sealing ring are arranged between cavity plate and core plate, comprise mold cavity and the gas access way on die joint in die joint sealing ring.
8. mould as claimed in claim 5, it is characterised in that also include that ventilating mechanism sealing ring, ventilating mechanism sealing ring are arranged between core plate and core fixing plate, comprise single ventilating mechanism in ventilating mechanism sealing ring.
9. mould as claimed in claim 8, it is characterised in that described ventilating mechanism is gas injection pin or ventilative steel, forms the gas cavity of uniform thickness between main non-appearance surface and the surface of mould cavity of the quantity of ventilating mechanism and position selection plastic to be ensured.
10. mould as claimed in claim 5, it is characterised in that also include that thimble sealing ring, thimble sealing ring are arranged between core fixing plate and core fixing plate, comprise single thimble in thimble sealing ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620368100.4U CN205601118U (en) | 2016-04-27 | 2016-04-27 | Control system of injection mold and control mold die cavity pressure |
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| CN201620368100.4U CN205601118U (en) | 2016-04-27 | 2016-04-27 | Control system of injection mold and control mold die cavity pressure |
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| CN205601118U true CN205601118U (en) | 2016-09-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105690698A (en) * | 2016-04-27 | 2016-06-22 | 山东大学 | Injection mold and control system and method for controlling pressure of mold cavity |
| CN109774085A (en) * | 2019-01-31 | 2019-05-21 | 贵州省材料产业技术研究院 | A kind of mold cavity pressure and temperature control equipment and method |
| TWI660834B (en) * | 2018-06-22 | 2019-06-01 | 瑞皇精密工業股份有限公司 | Injection molding device and injection method thereof |
| TWI687298B (en) * | 2018-05-17 | 2020-03-11 | 寶成工業股份有限公司 | Method for making foamed midsole |
| TWI719309B (en) * | 2018-05-16 | 2021-02-21 | 寶成工業股份有限公司 | Foaming mold device |
| CN113059742A (en) * | 2021-03-31 | 2021-07-02 | 山东大学 | Mold cavity high-pressure gas control system and control method |
| CN113334696A (en) * | 2021-06-22 | 2021-09-03 | 东风汽车集团股份有限公司 | Injection mold for strip-shaped plastic product and processing method |
| CN114074056A (en) * | 2020-08-20 | 2022-02-22 | 深圳市裕展精密科技有限公司 | Lead-in device, lead-in method and product |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105690698A (en) * | 2016-04-27 | 2016-06-22 | 山东大学 | Injection mold and control system and method for controlling pressure of mold cavity |
| CN105690698B (en) * | 2016-04-27 | 2018-05-08 | 山东大学 | A kind of injection mold and the control system and method for controlling mold cavity pressure |
| TWI719309B (en) * | 2018-05-16 | 2021-02-21 | 寶成工業股份有限公司 | Foaming mold device |
| TWI687298B (en) * | 2018-05-17 | 2020-03-11 | 寶成工業股份有限公司 | Method for making foamed midsole |
| TWI660834B (en) * | 2018-06-22 | 2019-06-01 | 瑞皇精密工業股份有限公司 | Injection molding device and injection method thereof |
| CN109774085A (en) * | 2019-01-31 | 2019-05-21 | 贵州省材料产业技术研究院 | A kind of mold cavity pressure and temperature control equipment and method |
| CN109774085B (en) * | 2019-01-31 | 2020-12-04 | 贵州省材料产业技术研究院 | Pressure and temperature control device for mold cavity |
| CN114074056A (en) * | 2020-08-20 | 2022-02-22 | 深圳市裕展精密科技有限公司 | Lead-in device, lead-in method and product |
| CN113059742A (en) * | 2021-03-31 | 2021-07-02 | 山东大学 | Mold cavity high-pressure gas control system and control method |
| CN113059742B (en) * | 2021-03-31 | 2022-03-25 | 山东大学 | Mold cavity high-pressure gas control system and control method |
| CN113334696A (en) * | 2021-06-22 | 2021-09-03 | 东风汽车集团股份有限公司 | Injection mold for strip-shaped plastic product and processing method |
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