CN103552223B - A kind of injection mold Fast Heating and cooling means and system - Google Patents
A kind of injection mold Fast Heating and cooling means and system Download PDFInfo
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- CN103552223B CN103552223B CN201310554636.6A CN201310554636A CN103552223B CN 103552223 B CN103552223 B CN 103552223B CN 201310554636 A CN201310554636 A CN 201310554636A CN 103552223 B CN103552223 B CN 103552223B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76732—Mould
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of injection mold Fast Heating and cooling system, comprise the closed loop that four can control separately break-make, be respectively used to cavity board input hot fluid medium, hot fluid medium in output mask cavity plate, to cavity board input cold fluid medium, the cold fluid medium in output mask cavity plate; Described cavity board comprises at least one fluid media (medium) input main line, a fluid media (medium) exports main line and connects some bye-passes of fluid media (medium) input main line and fluid media (medium) output main line; In described bye-pass, heating element heater is installed, between heating element heater and installation hole wall, leaves gap.Present invention also offers a kind of injection mold Fast Heating and cooling means, comprise mold heated stage, heating end after-stage, cooling stage and cooling and terminate after-stage.Distinguishing feature of the present invention is that mold temperature modification scope is large, heating cooling effectiveness and energy utilization rate is high, compact conformation, reliable operation, be convenient to safeguard, cost is low.
Description
Technical field
The invention belongs to materials processing subject, specifically belong to material injection moulding process and technical field of mold, particularly relate to a kind of Fast Heating of injection mold and cooling means and system.
Background technology
Injection mo(u)lding processing is one of plastics processing method be most widely used.In injection molding process, the plastic melt of melting will be injected among mold cavity gives its definite shape, and in mold cavity cooling and shaping.Because the shaping of plastic melt and cooling all complete in mold cavity, so mold cavity temperature controls all have very important impact for the quality of final injection molding product and molding cycle, mold temperature is also one of most important parameter of injection molding process.In conventional injection molding process, mold temperature controls usually to adopt a kind of temperature control strategy based on continuous coo1ing, and its target mold temperature is stabilized in whole injection molding cycle in a stable level.In order to shorten molding cycle and improve shaping efficiency, mold temperature needs to eject temperature far below plastic material, thus accelerates the cooling of plastic melt in mold cavity.But low mold temperature can cause plastic melt prematurely condensation to occur in mould filling process, thus reduce the filling capacity of melt, affect the quality of final molding product.Conversely, although high mold temperature is conducive to the quality improving product, molding cycle can be caused to extend and production efficiency decline.In a word, for the conventional Shooting Technique based on continuous cooling method, there is contradiction in product quality and the requirement of molding cycle to mold temperature.
In order to solve above-mentioned contradiction, desirable mold temperature control strategy should be first before the filling stage, mold cavity temperature is quickly heated up to higher temperature, then higher mold cavity temperature is maintained in the stage of filling, to ensure that plastic melt successfully can fill mold cavity, after end-of-fill, plastic melt in quick cooling die and die cavity, thus shorten molding cycle.
Injection molding process based on this desirable mold temperature control strategy is exactly so-called rapid thermal cycles Shooting Technique.In order to realize the mold temperature control strategy of this dynamic change, need to develop corresponding mould Fast Heating and method for rapid cooling.At present, in actual injection moulding is produced, the mould Fast Heating be most widely used and method for rapid cooling mainly comprise two kinds: a kind of is mould Fast Heating based on cold and hot fluid cycle alternation and method for rapid cooling, and another kind is mould Fast Heating based on electrical heating and water quench and method for rapid cooling.For the former, in order to obtain high temperature fluid medium, usual needs are equipped with special firing equipment, such as steam boiler, superheated water boiler, and corresponding transfer pipeline, this causes production cost to increase, simultaneously high-temperature medium also can the heat of large losses in course of conveying, in addition, and the recycling of some high temperature fluid also suitable difficulty, such as high-temperature steam, this also can cause great thermal loss.For the latter, mold heated utilizes the heating element heater being arranged on mould inside to realize.Because heating element heater is closely arranged in the installing hole of mould inside, so heating element heater is difficult to take out after installation is complete, this brings very large trouble to the replacing of heating element heater.Meanwhile, because heating element heater and the contact of installing between hole wall are uneven, so heating element heater easily occurs overheated and damages, this brings very large destabilizing factor to continuous seepage.In addition, except arranging a large amount of heating element heater installing holes in mould, also will arrange a large amount of cooling pipes, this not only adds Design of Dies, the complexity of processing and manufacturing and cost, impairs intensity and the service life of mould simultaneously.In addition, due to the existence of heating element heater, also make cooling pipe distance mold cavity surface farther, thus reduce mold cools down efficiency.
Summary of the invention
The present invention is directed to the defect of existing injection mold Fast Heating and cooling means, propose a kind of new injection mold Fast Heating and cooling means and system thereof.
The present invention is realized by following technical solution:
A kind of injection mold Fast Heating and cooling system, comprise the closed loop that four can control separately break-make, wherein, first loop comprises the hot fluid medium storage tank, cavity board, the hot fluid medium storage tank that are connected successively by pipeline; Second loop comprises the pressurized stored gas tank, cavity board, the hot fluid medium storage tank that are connected successively by pipeline; 3rd loop comprises the cold fluid medium storage tank, cavity board, the cold fluid medium storage tank that are connected successively by pipeline; 4th loop comprises the pressurized stored gas tank, cavity board, the cold fluid medium storage tank that are connected successively by pipeline.
Described cavity board comprises at least one fluid media (medium) input main line, a fluid media (medium) exports main line and connects some bye-passes of fluid media (medium) input main line and fluid media (medium) output main line.
In described bye-pass, heating element heater is installed.
Described injection mold Fast Heating and cooling system also comprise mold temperature monitoring system, and described mold temperature monitoring system comprises temperature sensor, terminal box, thermal medium inlet control valve, gases at high pressure inlet control valve, cold medium entrance control valve, cold media outlet control valve, thermal medium outlet control valve, control unit, man-machine interface and corresponding connection electric wire or cable composition.
Leave gap between described heating element heater and corresponding bye-pass wall, the preferred recommended range in gap is 0.5mm ~ 2mm;
The shape that described fluid media (medium) input main line, fluid media (medium) export main line and bye-pass can be square, U-shaped, polygon or circle etc., but preferable shape is circular, pipeline can be one dimension straight line, also can be two dimension or three-dimensional curve, the preferred recommended range of distance on pipeline outer wall distance mold cavity surface be 4mm ~ 30mm;
The preferred recommended range of the diameter of described circular pipeline is 6mm ~ 12mm, and the preferred recommended range of the minimum range between pipeline outer wall and mold cavity surface is 5mm ~ 20mm;
Described heating element heater is preferably recommended as cartridge heater or heating rod, and its diameter 1mm ~ 4mm less of the diameter of bye-pass, the power density of heating element heater is preferably recommended as 10W/cm
2~ 80W/cm
2;
Described mold cavity intralamellar part is provided with at least one temperature sensor, and the distance of the positional distance heating element heater of temperature sensor point for measuring temperature is preferably recommended as 2mm ~ 10mm;
The type of described thermal medium inlet control valve, gases at high pressure inlet control valve, cold medium entrance control valve, cold media outlet control valve or thermal medium outlet control valve needs to match according to the type of fluid media (medium) used, the voltage endurance capability of control valve is preferably recommended should higher than 10bar, and preferably recommend should higher than 150 DEG C for its temperature resistant capability simultaneously;
Described fluid media (medium) input main line, fluid media (medium) export on main line or bye-pass, at least one pressure sensor is installed, pressure sensor is connected with control unit by communication wire or cable, pressure sensor can the pressure of Real-time Feedback cavity board internal duct, and pass to control unit, and show eventually through man-machine interface;
Present invention also offers a kind of injection mold Fast Heating and cooling means, comprise the steps:
(1) the mold heated stage, hot fluid medium is flowed out by hot fluid medium storage tank, cavity board is entered through fluid media (medium) input main line, then be diverted in bye-pass, and then conflux into fluid media (medium) output main line, flow back to hot fluid medium storage tank again, after being full of hot fluid medium in cavity board internal duct, hot fluid medium is enclosed in the pipeline of mold cavity intralamellar part, then the energising of the heating element heater in cavity board is given, the heat that heating element heater produces is through hot fluid medium, arrive cavity board and thus rapidly heating moulds mold cavity surface, when mold cavity surface temperature is increased to design temperature, to heating element heater power-off, stop heating mould,
(2) mold heated terminates after-stage, gases at high pressure in pressurized stored gas tank enter cavity board through fluid media (medium) input main line, then be diverted in bye-pass, and then conflux into fluid media (medium) output main line, flow back to hot fluid medium storage tank again, thus the hot fluid medium that the mold heated stage remains in pipeline is blown into hot fluid medium storage tank, realize the abundant recycling of hot fluid medium, and be that the mold cools down of next molding cycle is ready;
(3) the mold cools down stage, cold fluid medium is flowed out by cold fluid medium storage tank, cavity board is entered through fluid media (medium) input main line, then be diverted in bye-pass, and then conflux into fluid media (medium) output main line, flow back to cold fluid medium storage tank again, cold fluid medium is when at a high speed by cavity board internal duct, the heat in cavity board can be taken away rapidly thus quick cooling die mold cavity surface, when mold cavity surface temperature is reduced to design temperature, stop cooling die;
(4) mold cools down terminates after-stage, gases at high pressure in pressurized stored gas tank enter cavity board through fluid media (medium) input main line, then be diverted in bye-pass, and then conflux into fluid media (medium) output main line, flow back to cold fluid medium storage tank again, thus the cold fluid medium that the mold cools down stage remains in pipeline is blown into cold fluid medium storage tank, realize the abundant recycling of cold fluid medium, and be that ensuing mold heated prepares;
In the described mold heated stage, the pressure of the hot fluid medium closed in cavity board internal duct will constantly raise, when hot fluid medium pressure is elevated to setting level, a part of hot fluid medium can be discharged, thus avoid too high hot fluid medium pressure, ensure the security of system works.
In order to improve the exchange capability of heat adding fluid media (medium) further, and then improve the heating cooling effectiveness of mould, can also install ultrasonic transducer (Piezoelectrictransmitter) in the inside of described cavity board, ultrasonic transducer is connected with supersonic generator (Ultrasonicgenerator) by transmission line.
The invention has the beneficial effects as follows: with routine based on electrically heated mould Fast Heating compared with method for rapid cooling, in the present invention, the heating element heater installing hole of mold cavity intralamellar part can simultaneously as cooling pipe, thus be conducive to simplifying mould structure, reducing processing and manufacturing cost and improve mould strength, simultaneously because cooling pipe distance mold cavity surface is nearer, therefore can effectively improve mold cools down efficiency; In the present invention, owing to leaving gap between heating element heater and corresponding installation hole wall, thus be conducive to the installation and removal of heating element heater, hot fluid medium is full of in gap simultaneously between mold heated stepwise heating element and corresponding installation hole wall, fluid and heating element heater, hole wall is installed fully contacts, thus ensure that the uniformity of heat exchange, effectively prevent the hot-spot of heating element heater, be conducive to the service life of improving mold heated uniformity and improving heating element heater; In addition, compared with conventional chilling pipeline, the cooling pipe in the present invention is circulating line, have less sectional area, under the prerequisite that cooling medium consumption is identical, the flow velocity of cooling medium is higher, correspondingly heat exchange efficiency is also just higher, thus is conducive to the cooling effectiveness improving mould.With the mould Fast Heating heated based on high temperature fluid (steam, hot water, deep fat etc.) compared with method for rapid cooling, mould Fast Heating of the present invention and method for rapid cooling do not need extra firing equipment, such as steam boiler, superheated water boiler etc., and supporting transfer pipeline, therefore have the advantages that system architecture is simply compact and cost is low; Due to heating element heater produce heat almost all for heating mould, with the inventive method and device there is very high energy utilization efficiency, significantly can reduce energy loss; Ring section cooling pipe can obtain higher cooling effectiveness and reduce the consumption of cooling medium; In addition, because the present invention can realize being separated completely and recycling of hot fluid medium and cold fluid medium, this is conducive to improving efficiency of energy utilization equally.
Accompanying drawing explanation
Fig. 1 is that injection mold Fast Heating of the present invention and accelerate cooling system form schematic diagram;
Fig. 2 is the structural representation of the molding mold cavity plate that the present invention relates to;
Fig. 3 is the A-A schematic cross-section in Fig. 2;
Fig. 4 is the B-B schematic cross-section in Fig. 2;
Fig. 5 is the molding mold cavity plate structure schematic diagram with ultrasonic generator that the present invention relates to.
In figure: 1. thermal medium booster pump, 2. thermal medium inlet control valve, 3. gases at high pressure inlet control valve, 4. fluid media (medium) input main line, 5. cold medium entrance control valve, 6. bye-pass, 7. cavity board, 8. heating element heater, 9. power line, 10. terminal box, 11. cables, 12. control units, 13. communication cables, 14. man-machine interfaces, 15. cold medium booster pumps, 16. cold fluid medium storage tanks, 17. pressurized stored gas tanks, 18. hot fluid medium storage tanks, 19. thermal medium outlet control valves, 20. fluid media (medium)s export main line, 21. cold media outlet control valves, 22. temperature sensors, 30. pressure sensors, 101. ultrasonic transducer, 102. supersonic generator, 103. transmission line.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
As Figure 1-5, whole injection mold Fast Heating and accelerate cooling system comprise four closed circuit systems and a mold temp. controlling system.
First closed circuit system is exported main line 20, thermal medium outlet control valve 19 etc. be formed by connecting by pipeline by hot fluid medium storage tank 18, thermal medium booster pump 1, thermal medium inlet control valve 2, fluid media (medium) input main line 4, cavity board 7, fluid media (medium) successively.
Second closed circuit system is exported main line 20, thermal medium outlet control valve 19, hot fluid medium storage tank 18 etc. be formed by connecting by pipeline by pressurized stored gas tank 17, gases at high pressure inlet control valve 3, fluid media (medium) input main line 4, cavity board 7, fluid media (medium) successively.
3rd closed circuit system is exported main line 20, cold media outlet control valve 21 etc. be formed by connecting by pipeline by cold fluid medium storage tank 16, cold medium booster pump 15, cold medium entrance control valve 5, fluid media (medium) input main line 4, cavity board 7, fluid media (medium) successively.
4th closed circuit system is exported main line 20, cold media outlet control valve 21, cold fluid medium storage tank 16 etc. be formed by connecting by pipeline by pressurized stored gas tank 17, gases at high pressure inlet control valve 3, fluid media (medium) input main line 4, cavity board 7, fluid media (medium) successively.
Mold temp. controlling system is made up of temperature sensor 22, pressure sensor 30, heating element heater 8, terminal box 10, thermal medium inlet control valve 2, gases at high pressure inlet control valve 3, cold medium entrance control valve 5, cold media outlet control valve 21, thermal medium outlet control valve 19, control unit 12, man-machine interface 14 and corresponding connection electric wire or cable; The power line 9 of heating element heater 8 is connected with terminal box 10, and terminal box 10 is connected with control unit 12 by cable 11, is connected between control unit 12 with man-machine interface 14 by communication cable 13; Temperature sensor 22 is arranged on the region of the inner close heating element heater 8 of cavity board 7 and mold cavity near surface, and is connected with control unit 12 by holding wire, for Measurement die die cavity temperature; Pressure sensor 30 can be arranged on fluid media (medium) input main line 4, fluid media (medium) is exported on main line 20 or bye-pass 6, and connected with control unit 12 by holding wire, for the pressure in Measurement die internal pipeline.
Cavity board 7 inside is provided with at least one medium input main line, 4, medium and exports some the bye-passes 6 that main line 20 and connecting media input main line 4 and medium export main line 20; Bye-pass 6 inside is installed correspondence and is provided with heating element heater 8, and leave gap between heating element heater 8 and bye-pass wall, the preferred recommended range in gap is 0.5mm ~ 2mm;
The shape of some bye-passes 6 that fluid media (medium) input main line 4, fluid media (medium) export main line 20 and connect them can be square, U-shaped, polygon or circle etc., but preferable shape is circular, pipeline can be one dimension straight line, also can be two dimension or three-dimensional curve, the preferred recommended range of distance on pipeline outer wall distance mold cavity surface is 4mm ~ 30mm, the preferred recommended range of the diameter of circular pipeline is 6mm ~ 12mm, and the preferred recommended range of minimum range between circular pipeline hole wall and mold cavity surface is 5mm ~ 20mm;
Heating element heater 8 is preferably recommended as cartridge heater or heating rod, and its diameter 1mm ~ 4mm less of the diameter of bye-pass 6, the power density of heating element heater 8 is preferably recommended as 10W/cm
2~ 80W/cm
2;
The inside of cavity board 7 is provided with at least one temperature sensor 22 and at least one pressure sensor 30, the distance of the temperature-sensitive point distance heating element heater 8 of temperature sensor 22 is preferably recommended as 2mm ~ 10mm, and pressure sensor 30 is directly installed on fluid media (medium) input main line 4, fluid media (medium) exports on main line 20 or bye-pass 6;
In order to improve the exchange capability of heat adding fluid media (medium) further, and then improve the heating cooling effectiveness of cavity board 7, can also install ultrasonic transducer (Piezoelectrictransmitter) 101 in the inside of described cavity board 7, ultrasonic transducer 101 is connected with supersonic generator (Ultrasonicgenerator) 102 by transmission line 103.
The voltage endurance capability of thermal medium inlet control valve 2, gases at high pressure inlet control valve 3, cold medium entrance control valve 5, cold media outlet control valve 21, thermal medium outlet control valve 19 is preferably recommended as more than 10bar, and temperature resistant capability is preferably recommended as more than 150 DEG C.
Operation principle of the present invention is as follows:
The function of injection mold Fast Heating of the present invention and fast cooling means and system and device thereof is the circulation Fast Heating that realizes mold cavity and cool fast.According to mold temperature change course, injection mold Fast Heating and the quick cooling procedure of a circulation can be divided into four-stage, and be respectively: mold heated stage, mold heated terminate after-stage, in the mold cools down stage, mold cools down terminates after-stage.Below will respectively for four working stages, introduce operation principle of the present invention in detail:
In the mold heated stage, first, thermal medium inlet control valve 2 and thermal medium outlet control valve 19 are opened, gases at high pressure inlet control valve 3, cold medium entrance control valve 5 and cold media outlet control valve 21 are closed, heating element heater 8 is closed, under the swabbing action of thermal medium booster pump 1, hot fluid medium is flowed out by hot fluid medium storage tank 18, successively through thermal medium booster pump 1, thermal medium inlet control valve 2, medium input main line 4, some bye-passes 6 in cavity board 7, medium exports main line 20, thermal medium outlet control valve 19, finally flow back to hot fluid medium storage tank 18, then, close thermal medium outlet control valve 19 and thermal medium inlet control valve 2 successively, thus hot fluid medium is full of and is closed in export in main line 20 and bye-pass 6 at medium input main line 4, medium, finally, control unit 12 is energized to heating element heater 8, the heat that heating element heater 8 produces is through the hot fluid medium sealed up for safekeeping heating element heater 8 with corresponding bye-pass 6, then cavity board 7 is diffused into, thus rapidly heating moulds mold cavity surface, when the mold cavity temperature that temperature sensor 20 feeds back to control unit 12 is elevated to the temperature levels of setting, control unit 12 will cut off the power supply of heating element heater 8, to stop mold heated, thus enter mold heated and terminate after-stage.Because hot fluid medium contacts with the inwall of bye-pass 6 is full and uniform with the outer surface of heating element heater 8 respectively, this heat that heating element heater 8 is produced can evenly spread to cavity board 7 uniformly, thus ensure that the uniformity of mold heated, also effectively prevent the hot-spot phenomenon of heating element heater 8, improve the service life of heating element heater 8.In addition, owing to there is gap between heating element heater 8 with the inwall of corresponding bye-pass 6, this will extremely be conducive to installation, the replacing of heating element heater 8 and safeguard.
After the mold heated stage terminates, control unit 12 sends instruction, open gases at high pressure inlet control valve 3 and thermal medium outlet control valve 19, keep thermal medium inlet control valve 2, cold medium entrance control valve 5, cold media outlet control valve 21 is closed and heating element heater 8 power-off, gases at high pressure will be flowed out by pressurized stored gas tank 17, successively through gases at high pressure inlet control valve 3, medium input main line 4, bye-pass 6 in cavity board 7, medium exports main line 20, thermal medium outlet control valve 19, final inflow hot fluid medium storage tank 18, thus medium input main line 4 will be remained in the heating period, the hot fluid medium that bye-pass 6 in cavity board 7 and medium export in main line 20 blows back hot fluid medium storage tank 18, realize the abundant recycling of hot fluid medium, to improve efficiency of energy utilization, and be that the mold cools down of next stage is ready.
In the mold cools down stage, control unit 12 sends instruction, open cold medium entrance control valve 5 and cold media outlet control valve 21, and keep thermal medium inlet control valve 2, gases at high pressure inlet control valve 3, thermal medium outlet control valve 19 is closed and heating element heater 8 power-off, under the swabbing action of cold medium booster pump 15, cold fluid medium is flowed out by cold fluid medium storage tank 16, successively through cold medium booster pump 15, cold medium entrance control valve 5, medium input main line 4, bye-pass 6 in cavity board 7, medium exports main line 20, cold media outlet control valve 21, finally flow back to cold fluid medium storage tank 16, cold fluid medium is when flowing through at a high speed the bye-pass 6 in cavity board 7, heat in cavity board 7 can be taken away rapidly, thus realize the quick cooling of mould, when the mold cavity temperature that temperature sensor 20 feeds back to control unit 12 is reduced to design temperature level, control unit 12 sends instruction, closes cold medium entrance control valve 5 and cold media outlet control valve 21, to cut off the flow line of cold fluid medium, thus stopping cooling die, and enter mold cools down and terminate after-stage.Owing to adopting heating element heater 8 and the flow line of the gap between corresponding bye-pass 6 as cold fluid medium, so do not need to set up extra cooling line in cavity board, this is conducive to simplifying mould structure, reduce Mould Machining manufacturing cost and improve mould structure intensity, in addition, because the cross section in the gap between heating element heater 8 with corresponding bye-pass 6 is less, therefore cold fluid medium has flow velocity faster, thus higher mold cools down efficiency can be obtained, simultaneously because the cooling pipe distance mold cavity surface of cold fluid medium in cavity board 7 is nearer, this also will have utilization to improve mold cools down efficiency.
After-stage is terminated in mold cools down, control unit 12 sends instruction, open gases at high pressure inlet control valve 3 and cold media outlet control valve 21, and keep thermal medium inlet control valve 2, cold medium entrance control valve 5, thermal medium outlet control valve 19 is closed and heating element heater 8 power-off, gases at high pressure will be flowed out by pressurized stored gas tank 17, successively through gases at high pressure inlet control valve 3, medium input main line 4, bye-pass 6 in cavity board 7, medium exports main line 20, cold media outlet control valve 21, final inflow cold fluid medium storage tank 16, thus cooling stage is remained in medium input main line 4, the cold fluid medium that bye-pass 6 in cavity board 7 and medium export in main line 20 blows back cold fluid medium storage tank 16, realize the abundant recycling of cold fluid medium, to improve efficiency of energy utilization, and be that the heating of next modulus of periodicity tool is ready.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (10)
1. injection mold Fast Heating and a cooling means, is characterized in that, comprises the steps:
(1) the mold heated stage, hot fluid medium is flowed out by hot fluid medium storage tank, cavity board is entered through fluid media (medium) input main line, then be diverted in bye-pass, and then conflux into fluid media (medium) output main line, flow back to hot fluid medium storage tank again, after being full of hot fluid medium in cavity board internal duct, hot fluid medium is enclosed in the pipeline of mold cavity intralamellar part, then the energising of the heating element heater in cavity board is given, the heat that heating element heater produces is through hot fluid medium, arrive cavity board and thus heating mould mold cavity surface, when mold cavity surface temperature is increased to design temperature, to heating element heater power-off, stop heating mould,
(2) mold heated terminates after-stage; Gases at high pressure in pressurized stored gas tank enter cavity board through fluid media (medium) input main line, then be diverted in bye-pass, and then conflux into fluid media (medium) output main line, flow back to hot fluid medium storage tank again, thus the hot fluid medium that the mold heated stage remains in pipeline is blown into hot fluid medium storage tank;
(3) the mold cools down stage; Cold fluid medium is flowed out by cold fluid medium storage tank, cavity board is entered through fluid media (medium) input main line, then be diverted in bye-pass, and then conflux into fluid media (medium) output main line, flow back to cold fluid medium storage tank again, cold fluid medium, when at a high speed by cavity board internal duct, can take away rapidly the heat in cavity board thus quick cooling die mold cavity surface, when mold cavity surface temperature is reduced to design temperature, to stop cooling die;
(4) mold cools down terminates after-stage; Gases at high pressure in pressurized stored gas tank enter cavity board through fluid media (medium) input main line, then be diverted in bye-pass, and then conflux into fluid media (medium) output main line, flow back to cold fluid medium storage tank again, thus the cold fluid medium that the mold cools down stage remains in pipeline is blown into cold fluid medium storage tank.
2. injection mold Fast Heating as claimed in claim 1 and cooling means, is characterized in that, in the described mold heated stage, when hot fluid medium pressure is elevated to setting level, discharge a part of hot fluid medium.
3. injection mold Fast Heating as claimed in claim 1 and cooling means, it is characterized in that: the injection mold Fast Heating that described method uses and cooling system comprise the closed loop that four can control separately break-make, wherein, first loop comprises the hot fluid medium storage tank, cavity board, the hot fluid medium storage tank that are connected successively by pipeline; Second loop comprises the pressurized stored gas tank, cavity board, the hot fluid medium storage tank that are connected successively by pipeline; 3rd loop comprises the cold fluid medium storage tank, cavity board, the cold fluid medium storage tank that are connected successively by pipeline; 4th loop comprises the pressurized stored gas tank, cavity board, the cold fluid medium storage tank that are connected successively by pipeline; Described cavity board comprises at least one fluid media (medium) input main line, a fluid media (medium) exports main line and connects some bye-passes of fluid media (medium) input main line and fluid media (medium) output main line; In described bye-pass, heating element heater is installed.
4. injection mold Fast Heating as claimed in claim 3 and cooling means, it is characterized in that: described injection mold Fast Heating and cooling system also comprise mold temperature monitoring system, described mold temperature monitoring system comprises temperature sensor, terminal box, thermal medium inlet control valve, gases at high pressure inlet control valve, cold medium entrance control valve, cold media outlet control valve, thermal medium outlet control valve, control unit, man-machine interface and corresponding connection electric wire or cable composition.
5. injection mold Fast Heating as claimed in claim 3 and cooling means, it is characterized in that: leave gap between described heating element heater and corresponding bye-pass wall, the scope in gap is 0.5mm ~ 2mm.
6. injection mold Fast Heating as claimed in claim 3 and cooling means, it is characterized in that: the shape that described fluid media (medium) input main line, fluid media (medium) export main line and bye-pass is square, U-shaped or circular, pipeline is one dimension straight line, two dimension or three-dimensional curve, and the distance range on pipeline outer wall distance mold cavity surface is 4mm ~ 30mm.
7. injection mold Fast Heating as claimed in claim 5 and cooling means, it is characterized in that: described fluid media (medium) input main line, fluid media (medium) export the shape of main line and bye-pass for circular, the scope of the diameter of described circular pipeline is 6mm ~ 12mm, and the distance range between pipeline outer wall and mold cavity surface is 5mm ~ 20mm.
8. injection mold Fast Heating as claimed in claim 3 and cooling means, it is characterized in that: described heating element heater is cartridge heater or heating rod, its diameter 1mm ~ 4mm less of the diameter of bye-pass, the power density of heating element heater is 10W/cm
2~ 80W/cm
2.
9. injection mold Fast Heating as claimed in claim 4 and cooling means, is characterized in that: the distance of the positional distance heating element heater of described temperature sensor point for measuring temperature is 2mm ~ 10mm.
10. injection mold Fast Heating as claimed in claim 3 and cooling means, is characterized in that: the inside of described cavity board is provided with ultrasonic transducer, and ultrasonic transducer is connected with supersonic generator by transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310554636.6A CN103552223B (en) | 2013-11-08 | 2013-11-08 | A kind of injection mold Fast Heating and cooling means and system |
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| CN105437487A (en) * | 2014-05-30 | 2016-03-30 | 汉达精密电子(昆山)有限公司 | Mold zone control system |
| CN104174835B (en) * | 2014-06-25 | 2016-02-24 | 华南理工大学 | A kind of method and device thereof improving fluid and mold hot exchange efficiency |
| CN105235161A (en) * | 2015-11-06 | 2016-01-13 | 宁波市百鸽智能科技有限公司 | Mould temperature control system and control method |
| CN105835324B (en) * | 2016-05-25 | 2018-06-19 | 南华大学 | Nano-fluid assists rapid thermal cycles injection molding system and injection molding forming method |
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| CN109571893A (en) * | 2018-08-13 | 2019-04-05 | 湖北民族学院 | A kind of diversion mechanism, quick method for heating and controlling and mold heating system |
| CN110027182A (en) * | 2019-05-28 | 2019-07-19 | 福建富兰光学有限公司 | A kind of dynamic analog temperature switching device |
| CN110181770A (en) * | 2019-06-27 | 2019-08-30 | 浙江舜宇光学有限公司 | Become the forming method of mould temperature system and optical mirror slip |
| CN114508850A (en) * | 2020-10-23 | 2022-05-17 | 广州道晨模具配件有限公司 | Intelligent temperature control island |
| CN113524640B (en) * | 2021-07-12 | 2023-01-13 | 广东华中科技大学工业技术研究院 | Multi-heat-source hot bending forming die and control method thereof |
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