WO2012069998A1 - Integrated pre-heating and cooling system for dies - Google Patents

Integrated pre-heating and cooling system for dies Download PDF

Info

Publication number
WO2012069998A1
WO2012069998A1 PCT/IB2011/055248 IB2011055248W WO2012069998A1 WO 2012069998 A1 WO2012069998 A1 WO 2012069998A1 IB 2011055248 W IB2011055248 W IB 2011055248W WO 2012069998 A1 WO2012069998 A1 WO 2012069998A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
hydraulic circuit
die
tank
preheating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2011/055248
Other languages
French (fr)
Inventor
Camillo Penocchio
Paolo Bonvicini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrial Frigo Srl
Original Assignee
Industrial Frigo Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrial Frigo Srl filed Critical Industrial Frigo Srl
Priority to RS20150183A priority Critical patent/RS53889B1/en
Priority to EP11807747.8A priority patent/EP2643110B1/en
Priority to RU2013118030/02A priority patent/RU2573459C2/en
Priority to CA2816846A priority patent/CA2816846C/en
Priority to SI201130438T priority patent/SI2643110T1/en
Priority to ES11807747.8T priority patent/ES2534390T3/en
Priority to JP2013540470A priority patent/JP5954334B2/en
Priority to US13/988,008 priority patent/US8863818B2/en
Priority to KR1020137012389A priority patent/KR20130130720A/en
Priority to PL11807747T priority patent/PL2643110T3/en
Priority to BR112013012857-7A priority patent/BR112013012857B1/en
Priority to CN201180056649.XA priority patent/CN103228379B/en
Priority to HRP20150207TT priority patent/HRP20150207T1/en
Priority to MX2013005409A priority patent/MX2013005409A/en
Publication of WO2012069998A1 publication Critical patent/WO2012069998A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/065—Cooling or heating equipment for moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/04—Machines or apparatus for chill casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2218—Cooling or heating equipment for dies
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/007—Tempering units for temperature control of moulds or cores, e.g. comprising heat exchangers, controlled valves, temperature-controlled circuits for fluids
    • 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

Definitions

  • the present invention is directed to a system for the thermoregulation of devices in industrial process plants operating at high temperatures, particularly dies for die- casting, dies for chill casting and the like.
  • the afore said dies may also work at higher temperatures, for example about 350 °C and higher.
  • they have to be thermoregulated, at least by cooling them where their temperature tends to extreme and inadmissible values.
  • the cooling is carried out by means of a heat-transfer fluid, such as water or diathermic oil, coming from a tank and circulated in ducts obtained in the die and subsequently in a heat exchanger to be cooled in its turn before its return to the tank.
  • a heat-transfer fluid such as water or diathermic oil
  • the cooling fluid in case of water, is contained in a pressurized tank and it is circulated in a high - pressurized closed circuit of about 169 Bar at 350 °C, for example, the latter entailing relevant structural problems about sealing and safety of the circuit itself.
  • the primary circuit is integrated with the secondary circuit intended for the circulation of a gaseous fluid, typically air, in the die to be conditioned both in alternative and in a mixed form with the liquid fluid, and with a unit for controlling and operating the primary hydraulic circuit and the secondary pneumatic circuit for the system operation and for thermoregulating the die with the only liquid fluid, with the only gaseous fluid or the gaseous fluid mixed with the liquid fluid.
  • a gaseous fluid typically air
  • This system is workable and reliable, advantageously allowing the circulation of the liquid heat-transfer fluid with pressure levels relatively low, but it is only suited for cooling the dies.
  • a pre-heating of the dies at a temperature of 140 - 160 °C, for example, anyway lower than the real working temperature of the same dies.
  • the pre-heating may be carried out with the liquid fluid returning from a die and collected in the system tank after its passage through the heat exchanger, but the fluid temperature in the tank, usually in the range of 90 - 100 °C, is not in itself sufficient for an appropriate die heating.
  • the die pre-heating with a liquid fluid heated up to the desired temperature in the same tank of the thermoregulating system, or in another additional tank, if not in pressurized conditions, may lead to the undesired vapor formation, thermal loss and energy consumption .
  • the present invention has been designed to satisfy this need too and, as a matter of fact, it is its main object to establish the conditions, in addition to for the die cooling with a liquid and/ or gaseous fluid at relatively low pressures, also for the pre-heating of the dies themselves up to a desired temperature from time to time .
  • a further object of the invention is then to provide a system for the thermoregulation of dies in which a cooling circuit and a heating circuit are combined and integrated, particularly in dies for die-casting, dies for chill casting and the like, operating with relatively high temperatures.
  • the system for the thermo-regulation of a die or chill 10 comprises essentially an open storage tank 11, a primary hydraulic circuit 12, a secondary pneumatic circuit 13 and an auxiliary pre-heating circuit 112 connected to the primary hydraulic circuit.
  • the storage tank 11 has a volume of heat-transfer fluid, preferably water loaded therein and then filled up if necessary through a supply line 14 having a filter FA and a loading solenoid valve EV1.
  • the fluid level in the tank 11 is controlled by a level sensor SL and overflow device 15.
  • the primary hydraulic circuit 12 has a delivery line 12' from the tank to the die 10 and a return line 12" from the die to the tank, whereas the pneumatic circuit 13 is connected to the delivery line 12 1 of the primary circuit by means of an ejector EJT.
  • a recirculation pump PI and, downstream this but upstream the ejector EJT, a solenoid valve EV4 with adjustable opening and, downstream said ejector, a delivery pressure switch Pml, to operate the minimum pressure in the same line 12', a manometer Ml and a safety valve VS are inserted.
  • the delivery line 12' is reconnected to the storage tank 11 through the bypass line 16 having an on/off valve EVBP.
  • the return line 12" passes through at least one heat exchanger SC and it may be provided with a possible pressure switch to operate the minimum return pressure and with a regulation metering valve DRL.
  • the heat exchanger SC is fed with a cooling fluid through inlet and outlet lines 17 under the control of a solenoid valve EV5 on the inlet line.
  • the pneumatic circuit 13 is provided for the circulation of a aeriform fluid, typically air, and it is connected to the delivery line 12' of the hydraulic circuit 12 through the ejector EJT and it comprises at least one manometer M2, an inlet solenoid valve EV2 and a non-return valve VR1.
  • a aeriform fluid typically air
  • the hydraulic pre-heating circuit 112 of the die is substantially ring - shaped in its inside and it is integrated with the so far described system.
  • a three-way solenoid valve EV5 is inserted, and the pre-heating circuit 112 comprises a delivery line 112' towards the die, preferably in common and coincident with the same delivery line 12' of the primary hydraulic circuit 12, and a return line 112" extending from an outlet of said three-way valve EV5 until it joins with the delivery line 12', 112' common with the primary 12 and the pre-heating 112 circuits, in a part upstream the recirculation pump Pi.
  • a second tank 111 is inserted, the latter containing water too and being provided with an electric resistor R to heat and maintain the temperature of the liquid herein contained.
  • such a second tank 111 is positioned downstream the recirculation pump PI, between the latter and the ejector EJT. It is further provided with a thermal probe S3 to detect the water temperature in its inside and with a vent line 111' with a vent solenoid valve EV6, connecting it to the return line 12' of the primary hydraulic circuit downstream the three-way solenoid valve EV5, that is downstream the heat exchanger SC.
  • a second pump P2 or pressurization pump, may be provided, which is inserted on the delivery line 12', in the represented example, from the storage tank 11 to the die 10.
  • the circulation of the preheating fluid in the pre-heating circuit 112 may be realized by the same recirculation pump PI, conveniently positioned and activated, of the cooling fluid.
  • the plant may be further comprise a temperature probe: SI of the water in the storage tank, a temperature probe S2 at the die 10, as well as a non-return valve VR2, an expansion vessel 114, a pressure switch Pm2 and a manometer M3 on the line of the second pump P2.
  • the system of the invention may operate according to three different modes:
  • PLC electronic device
  • valves VBP and DRL on the primary circuit may be carried out manually.
  • the water that is withdrawn from the storage tank and circulated in the primary circuit 12 by the recirculation pump 12 represents the main cooling fluid.
  • the system has areas with different pressures and temperatures allowing anyway the cooling water not to ever evaporate.
  • the air could then be used both for adjusting the water temperature, in case of insufficient cooling of the die, and as cooling emergency fluid, with security functions in response to different alarms and/ or failures of the recirculation pump PI or other components of the primary hydraulic circuit 12.
  • the recirculation pump PI When the cooling system is started, the recirculation pump PI is stopped, the inlet solenoid valve EV2 of the pneumatic circuit 13 is open to admit air into the hydraulic circuit 12 and the solenoid valve EV1 opens to fill water into the vessel / tank 11 under the control of a level sensor SL. After a predetermined time, and if the pressure and temperature parameters in the system are within given thresholds, the solenoid valve EV2 closes and the pump PI starts, thereby activating the water cooling of the die or chill 10.
  • the water in the tank 11 maintains a temperature lower than 90 °C
  • the pressure in the delivery line 12' of the primary hydraulic circuit 12 is relatively high
  • the water enters into the die or chill 10 and it comes out heated at a temperature of about 180 - 200 °C, and then it comes back to said tank after it has passed through the heat exchanger, in which it is cooled and taken back to a temperature of 90 °C.
  • the water remains pressurized until the metering valve DRL, adjusted and operating to assure a minimum passage of water, to maintain the desired pressure in the hydraulic circuit upstream the valve itself, and to lower the water pressure from the side of its exit towards the vessel or tank.
  • the secondary pneumatic circuit 13 starts operating automatically when controls, alarms or failures in the hydraulic circuit ask for, anyway under the control of the programmed electronic device (PLC) and programmable according to requirements.
  • PLC programmed electronic device
  • the pump PI is stopped and the valve EV2 is open, the air arrives to the delivery line 12' through the ejector EJT and it runs through the circuit in the same direction of the cooling water, flushing out the pipes from the water itself and determining a die cooling until when the conditions allowing a correct water cooling are restored.
  • the main cooling fluid is become the air which, through the ejector EJT, is mixed with water in the desired and determined quantity by means of the solenoid valve EV4 driven by the operating electronic device.
  • the water contained into the second tank 111 preventively loaded with water that may come from the storage tank 111, is used.
  • the solenoid valve EV4 on the delivery line 12' of the primary hydraulic circuit 12 is open and the three-way solenoid valve EV5 on the line 12" returning from the die or chill is switched so that such a valve is closed at the side connected with the exchanger and it is open at the side connected with the return line 112" of the pre-heating circuit 112.
  • the water may be heated in the second tank 111 by the electric resistor and then it is supplied by the pump P2 towards the die or chill 10 for its pre-heating, for example to a temperature of 140 - 160°C.
  • the water exiting from the die passes through the three-way solenoid valve EV5 for its return to the second tank 111 through the return line 112" of the pre-heating circuit 112.
  • controlling electronic device both independently, and interacting with outer interfaces, will be programmed to operate the subsequent steps:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Abstract

The invention concerns a system for the thermoregulation of dies for die-casting, dies for chill casting and the like. It comprises a tank (11) containing a cooling fluid; a primary hydraulic circuit (12) for a circulation of the cooling fluid from the tank to the die to be cooled and from this to the tank through a heat exchanger (SC); a secondary pneumatic circuit (13) connected to the primary hydraulic circuit (12) for the circulation of an aeriform fluid in the die to be cooled both in alternative, and in a mixed form with the liquid cooling fluid; and a pre-heating hydraulic circuit (112) integrated with the primary hydraulic circuit (12) and assigned to the production and circulation of a hot liquid fluid for pre-heating the die to be thermoregulated.

Description

"INTEGRATED PRE-HEATING AND COOLING SYSTEM FOR DIES"
* * * *
Field of the Invention
The present invention is directed to a system for the thermoregulation of devices in industrial process plants operating at high temperatures, particularly dies for die- casting, dies for chill casting and the like.
State of the Art
The afore said dies may also work at higher temperatures, for example about 350 °C and higher. For their correct use in the die forming process field, they have to be thermoregulated, at least by cooling them where their temperature tends to extreme and inadmissible values.
Usually, the cooling is carried out by means of a heat-transfer fluid, such as water or diathermic oil, coming from a tank and circulated in ducts obtained in the die and subsequently in a heat exchanger to be cooled in its turn before its return to the tank.
According to main art, the cooling fluid, in case of water, is contained in a pressurized tank and it is circulated in a high - pressurized closed circuit of about 169 Bar at 350 °C, for example, the latter entailing relevant structural problems about sealing and safety of the circuit itself.
In a previous Patent IT 1 368 475 of the same Applicant, it is described and claimed a system for the thermoregulation of dies for die-casting, dies for chill casting and the like, comprising an open tank containing a liquid cooling fluid, particularly water, a primary hydraulic circuit for a circulation of said liquid fluid from said tank to the die to be thermoregulated and from the latter to the tank through a heat exchanger. The primary circuit is integrated with the secondary circuit intended for the circulation of a gaseous fluid, typically air, in the die to be conditioned both in alternative and in a mixed form with the liquid fluid, and with a unit for controlling and operating the primary hydraulic circuit and the secondary pneumatic circuit for the system operation and for thermoregulating the die with the only liquid fluid, with the only gaseous fluid or the gaseous fluid mixed with the liquid fluid.
This system is workable and reliable, advantageously allowing the circulation of the liquid heat-transfer fluid with pressure levels relatively low, but it is only suited for cooling the dies.
However, in the practice it is sometimes required and convenient, to better operate and accelerate the start of the die forming process, also a pre-heating of the dies at a temperature of 140 - 160 °C, for example, anyway lower than the real working temperature of the same dies. The pre-heating may be carried out with the liquid fluid returning from a die and collected in the system tank after its passage through the heat exchanger, but the fluid temperature in the tank, usually in the range of 90 - 100 °C, is not in itself sufficient for an appropriate die heating. On the other hand the die pre-heating with a liquid fluid heated up to the desired temperature in the same tank of the thermoregulating system, or in another additional tank, if not in pressurized conditions, may lead to the undesired vapor formation, thermal loss and energy consumption .
Objects and summary of the invention
The present invention has been designed to satisfy this need too and, as a matter of fact, it is its main object to establish the conditions, in addition to for the die cooling with a liquid and/ or gaseous fluid at relatively low pressures, also for the pre-heating of the dies themselves up to a desired temperature from time to time .
A further object of the invention is then to provide a system for the thermoregulation of dies in which a cooling circuit and a heating circuit are combined and integrated, particularly in dies for die-casting, dies for chill casting and the like, operating with relatively high temperatures. These objected are reached, according to the invention, by a thermoregulation system according to the preamble of claim 1 and characterized in that the system further integrates means to pre-heat the water and a hydraulic circuit to pre-heat the die or chill with the hot water coming from said means.
Advantages of an integrated pre-heating and cooling system for dies, further to those related in the afore said Patent IT 1 368 475 concerning the possibility of water and air use, both separately and together, the safety, the cleanness and the ecological and economical aspects, are evidently of being able to use an open storage tank of heat-transfer fluid, that is at atmospheric pressure, and to carry and use the same fluid for two modes: pre-heating and cooling, alternatively, in the same plant, but with the fluid intended for the pre-heating having the possibility of being generated under pressure out of the storage tank to obviate to the vapor formation at the required temperatures in the die pre-heating.
Brief description of the drawing
Further details of the invention will be evident by following description made with reference to the attached drawing in which the only figure shows a general scheme of the system. Detailed description of the invention
Therefore and as it is represented the system for the thermo-regulation of a die or chill 10 comprises essentially an open storage tank 11, a primary hydraulic circuit 12, a secondary pneumatic circuit 13 and an auxiliary pre-heating circuit 112 connected to the primary hydraulic circuit.
The storage tank 11 has a volume of heat-transfer fluid, preferably water loaded therein and then filled up if necessary through a supply line 14 having a filter FA and a loading solenoid valve EV1. The fluid level in the tank 11 is controlled by a level sensor SL and overflow device 15.
The primary hydraulic circuit 12 has a delivery line 12' from the tank to the die 10 and a return line 12" from the die to the tank, whereas the pneumatic circuit 13 is connected to the delivery line 121 of the primary circuit by means of an ejector EJT.
Along the delivery line 12' at least a recirculation pump PI and, downstream this but upstream the ejector EJT, a solenoid valve EV4 with adjustable opening and, downstream said ejector, a delivery pressure switch Pml, to operate the minimum pressure in the same line 12', a manometer Ml and a safety valve VS are inserted. In the length between the recirculation pump PI and the solenoid valve EV4, the delivery line 12' is reconnected to the storage tank 11 through the bypass line 16 having an on/off valve EVBP.
The return line 12" passes through at least one heat exchanger SC and it may be provided with a possible pressure switch to operate the minimum return pressure and with a regulation metering valve DRL. In its turn the heat exchanger SC is fed with a cooling fluid through inlet and outlet lines 17 under the control of a solenoid valve EV5 on the inlet line.
The pneumatic circuit 13 is provided for the circulation of a aeriform fluid, typically air, and it is connected to the delivery line 12' of the hydraulic circuit 12 through the ejector EJT and it comprises at least one manometer M2, an inlet solenoid valve EV2 and a non-return valve VR1.
The hydraulic pre-heating circuit 112 of the die is substantially ring - shaped in its inside and it is integrated with the so far described system. According to the invention, on the return line 12" of the primary circuit 12 a three-way solenoid valve EV5 is inserted, and the pre-heating circuit 112 comprises a delivery line 112' towards the die, preferably in common and coincident with the same delivery line 12' of the primary hydraulic circuit 12, and a return line 112" extending from an outlet of said three-way valve EV5 until it joins with the delivery line 12', 112' common with the primary 12 and the pre-heating 112 circuits, in a part upstream the recirculation pump Pi.
Further, on the common line 12', 112' of the two primary and pre-heating circuits 12, 112 a second tank 111 is inserted, the latter containing water too and being provided with an electric resistor R to heat and maintain the temperature of the liquid herein contained.
In the represented example, such a second tank 111 is positioned downstream the recirculation pump PI, between the latter and the ejector EJT. It is further provided with a thermal probe S3 to detect the water temperature in its inside and with a vent line 111' with a vent solenoid valve EV6, connecting it to the return line 12' of the primary hydraulic circuit downstream the three-way solenoid valve EV5, that is downstream the heat exchanger SC.
To supply and circulate the pre-heating water from the second tank 111 towards the die 10 and from the latter to the same second tank a second pump P2, or pressurization pump, may be provided, which is inserted on the delivery line 12', in the represented example, from the storage tank 11 to the die 10. Alternatively the circulation of the preheating fluid in the pre-heating circuit 112 may be realized by the same recirculation pump PI, conveniently positioned and activated, of the cooling fluid. The plant may be further comprise a temperature probe: SI of the water in the storage tank, a temperature probe S2 at the die 10, as well as a non-return valve VR2, an expansion vessel 114, a pressure switch Pm2 and a manometer M3 on the line of the second pump P2.
The system of the invention may operate according to three different modes:
1. to alternatively cool the die with high pressurized air/ water (up to about 14 Bar) ;
2. to cool the die with air mixed with water at low pressure (about 1 -2 Bar)
3. to pre-heat the die with hot pressurized water all controlled by an electronic device (PLC) programmed to manage the readings coming from the number of controlling instruments and the instruments for opening and closing the solenoid valves.
Instead the opening / closing of the valves VBP and DRL on the primary circuit may be carried out manually.
In the first working mode, the water that is withdrawn from the storage tank and circulated in the primary circuit 12 by the recirculation pump 12 represents the main cooling fluid. The system has areas with different pressures and temperatures allowing anyway the cooling water not to ever evaporate. On the other hand, the air could then be used both for adjusting the water temperature, in case of insufficient cooling of the die, and as cooling emergency fluid, with security functions in response to different alarms and/ or failures of the recirculation pump PI or other components of the primary hydraulic circuit 12.
When the cooling system is started, the recirculation pump PI is stopped, the inlet solenoid valve EV2 of the pneumatic circuit 13 is open to admit air into the hydraulic circuit 12 and the solenoid valve EV1 opens to fill water into the vessel / tank 11 under the control of a level sensor SL. After a predetermined time, and if the pressure and temperature parameters in the system are within given thresholds, the solenoid valve EV2 closes and the pump PI starts, thereby activating the water cooling of the die or chill 10.
During the cooling, the water in the tank 11 maintains a temperature lower than 90 °C, the pressure in the delivery line 12' of the primary hydraulic circuit 12 is relatively high, the water enters into the die or chill 10 and it comes out heated at a temperature of about 180 - 200 °C, and then it comes back to said tank after it has passed through the heat exchanger, in which it is cooled and taken back to a temperature of 90 °C.
The water remains pressurized until the metering valve DRL, adjusted and operating to assure a minimum passage of water, to maintain the desired pressure in the hydraulic circuit upstream the valve itself, and to lower the water pressure from the side of its exit towards the vessel or tank.
The secondary pneumatic circuit 13 starts operating automatically when controls, alarms or failures in the hydraulic circuit ask for, anyway under the control of the programmed electronic device (PLC) and programmable according to requirements.
During the air cooling, the pump PI is stopped and the valve EV2 is open, the air arrives to the delivery line 12' through the ejector EJT and it runs through the circuit in the same direction of the cooling water, flushing out the pipes from the water itself and determining a die cooling until when the conditions allowing a correct water cooling are restored.
With the second working mode, the circuit pressure remains almost constant as time goes by, depending on the air pressure. The working pressure is then relatively low, 1 - 2 Bar, as afore said.
Then the main cooling fluid is become the air which, through the ejector EJT, is mixed with water in the desired and determined quantity by means of the solenoid valve EV4 driven by the operating electronic device.
As a result of a local and / or remote signal of cooling start, then there are two possibilities. a. The die cooling only with air, for which the solenoid valve EV2 opens for entering air, the pump PI starts, the valve VBP on the bypass line 16 is opened, whereas the solenoid valve EV4 on the delivery line 12' is closed for the return of water into the tank; then an air flow runs through the circuit, entering from the ejector EJT then to circulate in the die and exit into the tank. b. The die cooling with air mixed with water, for which the pump PI is started, if not started yet, and the solenoid valve EV2 for entering air is open as the valve BHP is open on the bypass line 16. In the same time an electronic control (PLC) operates the opening of the solenoid valve EV4 to measure out the correct quantity of water to be circulated with the air entering from the ejector EJT .
In the pre-heating mode of the die or chill 10, the water contained into the second tank 111, preventively loaded with water that may come from the storage tank 111, is used.
Then the recirculation pump PI is still inactive, the solenoid valve EV4 on the delivery line 12' of the primary hydraulic circuit 12 is open and the three-way solenoid valve EV5 on the line 12" returning from the die or chill is switched so that such a valve is closed at the side connected with the exchanger and it is open at the side connected with the return line 112" of the pre-heating circuit 112.
In these conditions, the water may be heated in the second tank 111 by the electric resistor and then it is supplied by the pump P2 towards the die or chill 10 for its pre-heating, for example to a temperature of 140 - 160°C. The water exiting from the die passes through the three-way solenoid valve EV5 for its return to the second tank 111 through the return line 112" of the pre-heating circuit 112.
Then the controlling electronic device, both independently, and interacting with outer interfaces, will be programmed to operate the subsequent steps:
- switched on system, but inactive for cooling the die as it is supplying neither air nor water;
- cooling of the die only with air;
cooling the die with air mixed with water in different required modulations;
- pre-heating of the die with hot water coming from a second tank provided with a heater.

Claims

1. A system for the thermoregulation of dies for die- casting, dies for chill casting and the like, comprising
- an open tank (11) containing a liquid cooling fluid, in particular water,
- a primary hydraulic circuit (12) for a circulation of said liquid cooling fluid from said tank to the die to be cooled and from this to the tank through a heat exchanger (SC) ,
- a secondary pneumatic circuit (13) connected to the primary hydraulic circuit (12) and provided for the circulation of an aeriform fluid in the die to be cooled both in alternative, and in a mixed form with the liquid cooling fluid, and
- a control unit of the primary hydraulic circuit (12) and of the secondary pneumatic circuit (13) to operate the cooling of the die with only the liquid cooling fluid, with only the aeriform fluid or with the aeriform fluid mixed with liquid fluid, characterized by further comprising a pre-heating hydraulic circuit (112) integrated with the primary hydraulic circuit (12) and assigned to the production and circulation of a hot liquid fluid for pre- heating the die to be thermoregulated.
2. A system according to the claim 1, in which
the primary hydraulic circuit (12) comprises at least a recirculation pump (Pi) for the circulation of the liquid fluid, a delivery line (12') from the fluid tank
(11) to the die and a return line (12") from the die to the tank through the heat exchanger for cooling said fluid,
- the secondary pneumatic circuit (13) is connected to the delivery line (12') of said primary hydraulic circuit
(12) by means of an ejector (EJT) positioned downstream of said circulation pump and of a non-return valve, and
- the pre-heating hydraulic circuit (112) comprises
• A three-way solenoid valve (EV5) on the return line (12") of the primary hydraulic circuit (12), downstream of said heat exchanger (SC) ,
• a second tank (111) containing preheating liquid fluid and provided with a heater (R) , in particular an electric resistor, to heat and maintain the temperature of the preheating fluid contained in it,
• a delivery line (112') of the preheating fluid from said second tank (111) to the die,
• a return line (112") of the preheating fluid from the die to the second tank (111) through said three-way valve (EV5) .
3. A system according to claim 1 or 2, in which the delivery line (112') of the preheating hydraulic circuit (112), starting from the second tank (111) containing the preheating fluid, coincides at least partially with the delivery line of the primary hydraulic circuit (12), in which the return line (112") of the preheating hydraulic circuit (112) coincides with the return line (12") of the primary hydraulic circuit (12) at least in the part between the die and the three-way solenoid valve (EV5) , and in which a pump is provided for the circulation of preheating fluid in said preheating hydraulic circuit (112) .
4. A system according to claim 3, in which the pump for the circulation of the fluid in the preheating circuit (112) is the same recirculation pump (Pi) for the circulation of the cooling fluid in the primary hydraulic circuit ( 12 ) .
5. A system according to claim 3, in which the pump for the circulation of the fluid in the preheating circuit (112) is made up of a second pump (P2) which can be activated alternatively to the recirculation pump (Pi) .
6. A system according to any one of the previous claims, in which the second tank (111) for the preheating fluid comprises a vent line (111' ) which is connected through a vent solenoid valve (EV6) to the return line (12") of the primary hydraulic circuit (12) downstream of the three-way solenoid valve (EV5) , and a thermal probe (S3) to control the temperature of the preheating fluid in the same tank.
7. A system according to any one of the previous claims, in which the tank (11) for the cooling fluid and the die are provided with thermal probes (SI; S2) and in which the primary hydraulic circuit (12) , the secondary pneumatic circuit (13) and the preheating circuit (112) comprise solenoid valves, pressure switches and manometers to control fluids currently circulating.
8. A system according to any one of the previous claims, in which on the return line (12") of the primary hydraulic circuit (12), upstream of the heat exchanger (SC) is inserted a metering valve to guarantee a minimum cooling fluid passage, to maintain a desired pressure in the hydraulic circuit upstream of the valve itself, and to lower the pressure of said fluid from the side of its exit towards the tank.
PCT/IB2011/055248 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies Ceased WO2012069998A1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
RS20150183A RS53889B1 (en) 2010-11-24 2011-11-23 INTEGRATED SYSTEM FOR PRE-HEATING AND COOLING OF CAPS
EP11807747.8A EP2643110B1 (en) 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies
RU2013118030/02A RU2573459C2 (en) 2010-11-24 2011-11-23 Integrated system of moulds pre-heating and cooling
CA2816846A CA2816846C (en) 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies
SI201130438T SI2643110T1 (en) 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies
ES11807747.8T ES2534390T3 (en) 2010-11-24 2011-11-23 Integrated mold preheating and cooling system
JP2013540470A JP5954334B2 (en) 2010-11-24 2011-11-23 System for mold temperature control
US13/988,008 US8863818B2 (en) 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies
KR1020137012389A KR20130130720A (en) 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies
PL11807747T PL2643110T3 (en) 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies
BR112013012857-7A BR112013012857B1 (en) 2010-11-24 2011-11-23 INTEGRATED COOKING PREHEATING AND COOLING SYSTEM
CN201180056649.XA CN103228379B (en) 2010-11-24 2011-11-23 For integrated the preheating and cooling system of mould
HRP20150207TT HRP20150207T1 (en) 2010-11-24 2011-11-23 INTEGRATED HEATING AND COOLING SYSTEMS
MX2013005409A MX2013005409A (en) 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2010A000190 2010-11-24
ITBS2010A000190A IT1402730B1 (en) 2010-11-24 2010-11-24 INTEGRATED HEATING AND COOLING SYSTEM FOR MOLDS

Publications (1)

Publication Number Publication Date
WO2012069998A1 true WO2012069998A1 (en) 2012-05-31

Family

ID=43742586

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2011/055248 Ceased WO2012069998A1 (en) 2010-11-24 2011-11-23 Integrated pre-heating and cooling system for dies

Country Status (16)

Country Link
US (1) US8863818B2 (en)
EP (1) EP2643110B1 (en)
JP (1) JP5954334B2 (en)
KR (1) KR20130130720A (en)
CN (1) CN103228379B (en)
BR (1) BR112013012857B1 (en)
CA (1) CA2816846C (en)
ES (1) ES2534390T3 (en)
HR (1) HRP20150207T1 (en)
IT (1) IT1402730B1 (en)
MX (1) MX2013005409A (en)
PL (1) PL2643110T3 (en)
RS (1) RS53889B1 (en)
RU (1) RU2573459C2 (en)
SI (1) SI2643110T1 (en)
WO (1) WO2012069998A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2796268A1 (en) 2013-04-24 2014-10-29 Robamat Automatisierungstechnik GmbH Method and device for tempering a tool mould
JP2016504197A (en) * 2012-12-21 2016-02-12 アルフィ エッセ．エッレ．エッレ． Mold fixture, especially casting mold cooling system
EP3162464A1 (en) * 2015-10-29 2017-05-03 Krakodlew spolka akcyjna System for recovery of heat from solidifying large-size metal castings and for using it to heat casting moulds
CN117884616A (en) * 2024-03-14 2024-04-16 泰州市海陵区恒创机械制造有限公司 Casting equipment for machine tool accessory production and casting method thereof

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBS20130135A1 (en) * 2013-10-01 2015-04-02 I E C I Di Inverardi Mauro METHOD AND THERMOREGULATION APPARATUS OF A MOLD
KR101637025B1 (en) 2014-09-19 2016-07-07 (주)광주금형 Mold apparatus with treated surface
EP3002071B1 (en) * 2014-10-01 2018-01-10 Idra S.R.L. Apparatus for checking die castings and method of using such apparatus
KR101782781B1 (en) 2016-06-16 2017-09-29 대한전기공업 주식회사 Mold temperature controller
US12246375B2 (en) 2017-09-11 2025-03-11 Entec-Stracon Gmbh Method, casting mold, and apparatus for producing a vehicle wheel
EP3645192B1 (en) 2017-09-11 2022-12-14 Entec-Stracon GmbH Method, casting mold and device for producing a vehicle wheel
CN109604572B (en) * 2018-12-05 2021-01-01 马鞍山市万鑫铸造有限公司 Metal wear-resistant medium casting equipment
CN110285643A (en) * 2019-06-12 2019-09-27 宁波普锐明汽车零部件有限公司 Heat-collecting mold warming equipment, its working method and mold preheating method
RU2765031C1 (en) * 2020-12-01 2022-01-24 Общество с ограниченной ответственностью "Техно Терм-Саратов" Casting method with formation of homogeneous fine-grained metal structure
CN113798471A (en) * 2021-06-03 2021-12-17 宁波新昱智能科技有限公司 High-temperature die-casting water temperature machine
KR102605944B1 (en) * 2021-07-01 2023-12-27 (주)케이알코리아 Vacuum suction chiller system
ES3057524T3 (en) * 2021-12-20 2026-03-03 Frigel Firenze S P A Machine for the temperature control of part of an industrial plant adapted for the formation of a product
CN115042394A (en) * 2022-06-08 2022-09-13 程涛 Injection mold for motorcycle engine side cover

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03180263A (en) * 1989-12-06 1991-08-06 Toyota Motor Corp Device cooling die in casting machine
EP0555976A1 (en) * 1992-02-12 1993-08-18 Ryobi Ltd. Metal mold cooling device
EP1563975A2 (en) * 2004-02-12 2005-08-17 Mitsubishi Heavy Industries, Ltd. Apparatus and method for mold temperature adjustment, and mold temperature control unit

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS180312B1 (en) * 1975-10-24 1977-12-30 Michal Kostura Equipment for automatic temperature control of metallic casting moulds
CS190096B1 (en) * 1977-03-02 1979-05-31 Michal Kostura Device for regulation of the temperature of instruments,particularly the casting moulds
JPH03161142A (en) * 1989-11-21 1991-07-11 Mitsumi Electric Co Ltd casting mold
JP3180263B2 (en) 1994-02-17 2001-06-25 田中 善悦 Separator and separator packing structure
JP3582036B2 (en) * 1996-05-13 2004-10-27 前澤工業株式会社 Gas-liquid contact device
JPH1058452A (en) * 1996-08-23 1998-03-03 Sakai Seiki Kk Cooling-water supplying manifold for metal mold and cooling-water recovering manifold for metal mold
JPH1157985A (en) * 1997-08-14 1999-03-02 Hitachi Metals Ltd Device for controlling temperature of metallic mold
JP2000210940A (en) * 1999-01-25 2000-08-02 Hitachi Metals Ltd Mold cooling structure and mold cooling method
ITMI990805A1 (en) * 1999-04-16 2000-10-16 Bbs Motorsport & Eng Gmbh THERMOREGULATION GROUP OF MOLDS PARTICULARLY FOR DIE-CASTING OF ALUMINUM AND ITS ALLOYS PLASTIC AND SIMILAR MATERIALS
DE60134768D1 (en) * 2000-09-25 2008-08-21 J F T Co Ltd MOLD COOLER
KR100415147B1 (en) * 2000-11-27 2004-01-14 유도실업주식회사 Temperature control apparatus and its method of injecting molding machine
JP2003145542A (en) * 2001-11-07 2003-05-20 Fuji Photo Film Co Ltd Heat exchange device for mold
JP2003211456A (en) * 2002-01-21 2003-07-29 Matsui Mfg Co Temperature control system for resin molding machine
JP5250223B2 (en) * 2007-08-20 2013-07-31 三菱重工プラスチックテクノロジー株式会社 Temperature control method and temperature control device for molding die
JP5305642B2 (en) * 2007-11-26 2013-10-02 株式会社カンネツ Temperature control system for plastic molding machines
JP2010012682A (en) * 2008-07-03 2010-01-21 Shisuko:Kk Multi-heating/cooling system of mold
CN201402416Y (en) * 2008-07-10 2010-02-10 辛格尔温度技术有限公司 Temperature control system and device with same
JP2010094855A (en) * 2008-10-15 2010-04-30 Stolz Co Ltd Temperature controller
CN201304712Y (en) * 2008-10-16 2009-09-09 王�忠 Mould temperature control system
RU2403125C2 (en) * 2008-10-21 2010-11-10 Открытое акционерное общество "Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" (ОАО НПО "ЦНИИТМАШ") Method of thermal control on injection moulding machine mould and device to this end
JP5235132B2 (en) * 2008-11-05 2013-07-10 株式会社サーモテック Mold temperature controller
CN101733914B (en) * 2008-11-12 2013-06-19 汉达精密电子(昆山)有限公司 Fast heating and cooling forming system and forming die thereof
CN201626095U (en) * 2010-04-08 2010-11-10 川田机械制造(上海)有限公司 Indirect Cooling Mold Temperature Controller
CN201633179U (en) * 2010-05-06 2010-11-17 深圳市奥德机械有限公司 Fast-cooling and fast-heating mold temperature machine
CN203543045U (en) * 2013-11-08 2014-04-16 山东大学 Quick heating and cooling system of injection mould

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03180263A (en) * 1989-12-06 1991-08-06 Toyota Motor Corp Device cooling die in casting machine
EP0555976A1 (en) * 1992-02-12 1993-08-18 Ryobi Ltd. Metal mold cooling device
EP1563975A2 (en) * 2004-02-12 2005-08-17 Mitsubishi Heavy Industries, Ltd. Apparatus and method for mold temperature adjustment, and mold temperature control unit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 201007, Derwent World Patents Index; AN 2010-A50332, XP002639159 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016504197A (en) * 2012-12-21 2016-02-12 アルフィ エッセ．エッレ．エッレ． Mold fixture, especially casting mold cooling system
EP2796268A1 (en) 2013-04-24 2014-10-29 Robamat Automatisierungstechnik GmbH Method and device for tempering a tool mould
EP3162464A1 (en) * 2015-10-29 2017-05-03 Krakodlew spolka akcyjna System for recovery of heat from solidifying large-size metal castings and for using it to heat casting moulds
CN117884616A (en) * 2024-03-14 2024-04-16 泰州市海陵区恒创机械制造有限公司 Casting equipment for machine tool accessory production and casting method thereof
CN117884616B (en) * 2024-03-14 2024-06-07 泰州市海陵区恒创机械制造有限公司 Casting equipment for machine tool accessory production and casting method thereof

Also Published As

Publication number Publication date
HRP20150207T1 (en) 2015-06-05
JP5954334B2 (en) 2016-07-20
SI2643110T1 (en) 2015-06-30
EP2643110A1 (en) 2013-10-02
RU2013118030A (en) 2014-10-27
IT1402730B1 (en) 2013-09-18
CA2816846C (en) 2019-08-06
US8863818B2 (en) 2014-10-21
PL2643110T3 (en) 2015-06-30
CN103228379A (en) 2013-07-31
RU2573459C2 (en) 2016-01-20
ES2534390T3 (en) 2015-04-22
KR20130130720A (en) 2013-12-02
ITBS20100190A1 (en) 2012-05-25
US20130233504A1 (en) 2013-09-12
BR112013012857B1 (en) 2018-06-26
JP2014502215A (en) 2014-01-30
EP2643110B1 (en) 2015-01-07
MX2013005409A (en) 2013-10-28
RS53889B1 (en) 2015-08-31
CA2816846A1 (en) 2012-05-31
CN103228379B (en) 2015-12-09

Similar Documents

Publication Publication Date Title
EP2643110B1 (en) Integrated pre-heating and cooling system for dies
CN102380939B (en) Mold temperature regulating apparatus
CN103153568B (en) Mold temperature regulating apparatus
US10648680B2 (en) Hot water supply system having preheating function and method for controlling same
WO2015053179A1 (en) Mold-cooling system and mold-cooling method
JP2012515096A (en) System and method for rapidly heating and cooling molds
US10857248B2 (en) Method of sterilizing beverage dispenser and beverage dispenser
JPS58215309A (en) Temperature control equipment of mold for plastic molding
WO2010053091A1 (en) Heating/cooling switching device and mold heating/cooling system using same
JP5235132B2 (en) Mold temperature controller
CN107234752B (en) Mold temperature adjusting device and mold temperature adjusting method
EP2308662B1 (en) Heating unit for heating press plates of vulcanizing press machine and method for heating press plates of vulcanizing press machine
JP2014173825A (en) Hot water supply device
ES3057524T3 (en) Machine for the temperature control of part of an industrial plant adapted for the formation of a product
CN216100254U (en) A mold temperature machine
KR102281821B1 (en) Injection molding apparatus of built-in type capable of pressure regulation and temperature control
JP2024110467A (en) Temperature Control Device
JP2024110466A (en) Temperature Control Device
JP5301263B2 (en) Cooling system
JPH0116144B2 (en)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11807747

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2013540470

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2013118030

Country of ref document: RU

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2011807747

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2816846

Country of ref document: CA

ENP Entry into the national phase

Ref document number: 20137012389

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: MX/A/2013/005409

Country of ref document: MX

WWE Wipo information: entry into national phase

Ref document number: 13988008

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: P-2015/0183

Country of ref document: RS

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112013012857

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112013012857

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20130523