CN110014092B - Mold cooling system and cleaning method - Google Patents
Mold cooling system and cleaning method Download PDFInfo
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- CN110014092B CN110014092B CN201910339067.0A CN201910339067A CN110014092B CN 110014092 B CN110014092 B CN 110014092B CN 201910339067 A CN201910339067 A CN 201910339067A CN 110014092 B CN110014092 B CN 110014092B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a die stamping technology, in particular to a die cooling system and a cleaning method, which comprises an ECU (electronic control unit) controller (1), a water storage cooling tank (2), a normally open electromagnetic valve (3), a cleaning water pump (4), an outlet electromagnetic valve (5), a pressure sensor (6), an outlet temperature sensor (7), a corrugated pipe (8), a die (9), a water channel (10), an inlet temperature sensor (12), an inlet electromagnetic valve (13), an accumulator pressure sensor (14), an accumulator (15), a water pump, a first water pipe (18) and a second water pipe, wherein one end of the first water pipe (18) is communicated with the water storage cooling tank (2) and is respectively connected with the normally open electromagnetic valve (3) and the cleaning water pump (4) in parallel, the other end of the first water pipe is communicated with the inlet of the water channel, the water channel with a coil shape is arranged in the die, the outlet of the water channel, and the first water pipe is connected with a pressure accumulator, an inlet electromagnetic valve and an inlet temperature sensor in series.
Description
Technical Field
The invention relates to a die stamping technology, in particular to a die cooling system and a cleaning method.
Background
In the prior art, in the hot type stamping process of a metal product, such as an automobile anti-collision beam, a blank before stamping is heated to a set temperature, and then the blank is placed into a pair of dies of a stamping machine tool, and the blank is plastically deformed by applying pressure on the pair of dies to obtain a metal product with a required shape. The strength and the strain resistance of the stamped metal product are improved. During the stamping production process, due to the high temperature of the blank, the temperature of the die exceeds the normal value in the continuous production process through heat exchange with the die, so that the die is deformed to influence the shape of the stamping part, and even the die is directly damaged. Therefore, in the conventional hot stamping process, a water channel is generally designed in the die, and the water channel is communicated with an external cooling device through a pipeline, so that heat of the die is transferred to the outside to be dissipated through heat exchange between cooling water in the water channel and the die.
In the prior art, the cooling water is used for cooling the die, and the following two modes are mainly adopted: mode 1: cooling water is continuously sent into the die through the water pump, so that the cooling water continuously flows through the water channel in the die, and the process can play a role in cooling the die; the disadvantage is that the cooling water flows in the die, whether the die is in the blank stamping process or the machine tool is in the feeding and discharging process. In fact, in three processes of feeding, stamping and blanking in stamping production, the temperature of a die is reduced to be below a set safety value in part of time, and cooling water still flows in a water channel when the die is cooled without heat exchange, so that the power of a water pump is wasted. Mode 2: when the machine tool is in a stamping process, the cooling water in the water channel in the die is kept in a flowing state, and when the machine tool is in a loading or unloading stage, the inlet or the outlet of the water channel of the die is cut off, so that the cooling water in the water channel stops flowing, and the power and the energy consumption of a water pump are saved; the mold has the disadvantages that because the mold material layer with a certain thickness is arranged between the water channel of the mold and the mold surface where the blank is positioned, when the blank is just placed in the mold, the contact surface between the blank and the mold is small, the heat conduction efficiency is low, the heat conduction is small, the temperature of the mold is slow, after stamping, the blank is plastically deformed and completely attached to the mold surface, the contact area between the blank and the mold surface reaches the maximum, the heat conduction efficiency is high, and the heat conduction quantity is small. In addition, the automatic stamping efficiency is high at present, and the time from the blank to the stamping and forming in the die is short, so that when the stamping process is finished, a large amount of heat from the blank is transferred to the water channel part and exchanges heat with cooling water in the water channel. If the die material layer is thicker, a large amount of heat from the blank is transferred to the water channel part and exchanges heat with cooling water in the water channel when the stamping process is finished and the blanking stage is started. In the 2 nd heat dissipation mode, when the machine tool is in the stamping process, water in the water channel flows to perform rapid heat exchange, the quantity of heat taken away is limited, and when the machine tool is in the feeding and discharging stages, the water in the water channel stops flowing, so that a large quantity of heat cannot be led out in time, the temperature of the die gradually rises, and even exceeds a limit value, so that the die deforms and is damaged.
The cooling water exists in the water channel in the mold for a long time, impurities are easy to deposit on the inner wall of the water channel, and scale is formed after long-time accumulation, and the formed scale can influence heat exchange between the cooling water and the mold. Therefore, the water channel of the mold needs to be descaled, a descaling agent is generally poured into the water storage cooling tank and is made to pass through the water channel in a circulating flow mode, dissolved impurities can be precipitated at the bottom of the water storage cooling tank, and the descaling agent has a certain corrosion effect on the mold, the water pipe and the sealing ring, so that after the descaling process is finished, the liquid in the water storage cooling tank needs to be replaced again, the water pipe and the water channel need to be washed by new cooling water, the residue of the descaling agent is prevented, the machine tool needs to be stopped in the process, and the normal production activities of enterprises can be influenced.
Disclosure of Invention
The invention aims to provide a mold cooling system and a cleaning method, which can realize the cleaning of a mold water channel without stopping a machine tool.
The technical scheme for solving the technical problem is as follows: the utility model provides a mould cooling system, includes ECU controller, water storage cooling tank, normally open solenoid valve, clean water pump, export solenoid valve, pressure sensor, export temperature sensor, bellows, mould, water course, entry temperature sensor, entry solenoid valve, accumulator pressure sensor, accumulator, water pump, water pipe one, water pipe two, water pipe one end and water storage cooling tank intercommunication and immerse the liquid level below, the other end and the export intercommunication of water course, be equipped with the water course of coil pipe form in the mould, the entry of water course and the one end intercommunication of water pipe two, the other end and the water storage cooling tank intercommunication of water pipe two and do not immerse the liquid level below. And a pressure storage port of the pressure accumulator is communicated with the second water pipe, and a pressure accumulator pressure sensor is arranged at the communication position. The water pump pumps a part of cooling water from the water storage cooling tank into the pressure accumulator in advance, so that the pressure in the pressure accumulator reaches the upper limit value, the water pump stops working, when the cooling water enters the die to be cooled, the cooling water in the pressure accumulator enters the die through the water pipe II, when the pressure in the pressure accumulator is reduced to the lower limit value, the water pump is started, water can be supplied to the die in a maintaining mode, the cooling water can be continuously pumped into the pressure accumulator until the pressure in the pressure accumulator reaches the upper limit value. The accumulator pressure sensor is used for detecting the pressure of the accumulator and transmitting a pressure signal to the ECU controller so that the ECU controller can judge when to start the water pump. The water pipe I is sequentially connected with a normally open electromagnetic valve, an outlet electromagnetic valve, a pressure sensor and an outlet temperature sensor in series in a sealing mode, a cleaning water pump is arranged on one side of the normally open electromagnetic valve and connected with the normally open electromagnetic valve in parallel through a pipeline, and the normally open electromagnetic valve, the cleaning water pump, the outlet electromagnetic valve, the pressure sensor, the outlet temperature sensor, the inlet electromagnetic valve, the accumulator pressure sensor and the water pump are all electrically connected with the ECU controller;
preferably, the ECU controller is also electrically connected with the controlled end of the relay and the anode of the 5V power supply, and the control end of the relay is connected with the machine tool motor circuit in series.
Preferably, the water channel is connected with the first water pipe and the second water pipe through corrugated pipes.
The technical scheme for solving the technical problem is as follows: a method of cleaning a mold cooling system, comprising the steps of:
firstly, in the normal cooling circulation process of the mold, an ECU controller continuously detects temperature values measured by an inlet temperature sensor and an outlet temperature sensor and compares the temperature difference between the inlet temperature sensor and the outlet temperature sensor;
secondly, when the machine tool works normally, if the temperature difference R is smaller than a set value P, namely R < P, the impurities deposited on the inner wall of the water channel influence the heat dissipation capacity of the mold, and the impurities on the inner wall of the water channel are necessary to be cleaned, and then the subsequent water channel cleaning process is carried out;
thirdly, calculating whether the current cleaning interval time from the last time of cleaning the water channel reaches or exceeds a set value, if so, executing a regular cleaning process by the ECU controller, and entering a subsequent water channel cleaning process;
the waterway cleaning process comprises: the ECU controller controls the inlet electromagnetic valve to be closed and keeps the outlet electromagnetic valve open, then the normally open electromagnetic valve is electrified to be closed, the cleaning water pump is electrified, and the cleaning water pump is opened to pump the cooling water in the left water pipe into the water storage cooling tank; at the moment, the pressure in the water pipe on the left side of the cleaning water pump and the pressure in the water channel of the mold both start to drop, the ECU controller detects the pressure value of the pressure sensor, when the pressure value is lower than a set value G, the ECU controller controls the outlet electromagnetic valve to be closed, then the cleaning water pump is stopped, and the normally open electromagnetic valve is powered off to be opened; because the mould is higher than the normal temperature in the working process, the cooling water in the water channel is also higher than the normal temperature, when the pressure value in the water channel is lower than a set value G, a certain vacuum degree is generated in the water channel, the boiling point of the cooling water is reduced, and a large amount of bubbles are generated in the cooling water in the water channel;
then, the ECU controller controls the water pump to start and generate a certain pumping pressure, the ECU controller controls the inlet solenoid valve to open so that the water channel is communicated with the water pump and the pressure accumulator, the pressure in the water channel is instantly changed from being lower than the atmospheric pressure to being higher than the atmospheric pressure, bubbles generated in the cooling water are blasted under the action of the instantly raised pressure, and the impact force generated by blasting can generate vibration and scouring effects on the inner wall of the water channel, so that impurities deposited on the inner wall of the water channel are vibrated to fall into the cooling water;
then, the ECU controller controls the outlet electromagnetic valve to be opened, the normally open electromagnetic valve is still powered off and keeps an open state, the inlet electromagnetic valve keeps open, cooling water containing impurities enters the water storage cooling tank under the action of the water pump and is precipitated at the bottom, and the water taking port at the left end of the water pipe II communicated with the water pump is positioned at the middle upper part of the water storage cooling tank and is far away from the bottom of the water storage cooling tank, but the water taking port can be guaranteed to be always submerged below the liquid level of the water storage cooling tank.
The mold cooling system and the cleaning method of the invention have the following advantages: the water channel cleaning process can be completed in the working process of the punching machine without stopping the punching machine. Compared with a single stamping process comprising feeding, stamping and blanking, the single cleaning process is shorter in time, the cleaning process can be inserted into the normal cooling circulation process of the die, and the influence on the normal heat dissipation of the die can be avoided. Preferably, the ECU controller is provided with a constant cleaning interval time, and the above-described cleaning process may be periodically performed on the mold waterway at a constant interval time without detecting the inlet temperature sensor or the outlet temperature sensor.
Drawings
Fig. 1 is a schematic view of the structure of the mold cooling system of the present invention.
FIG. 2 is a schematic diagram showing the working time states of the inlet and outlet solenoid valves and the machine tool of the mold cooling system of the present invention.
Description of the drawings: 1. ECU controller, 2, water storage cooling tank, 3, normally open solenoid valve, 4, clean water pump, 5, export solenoid valve, 6, pressure sensor, 7, export temperature sensor, 8, bellows, 9, mould, 10, water course, 12, entry temperature sensor, 13, entry solenoid valve, 14, accumulator pressure sensor, 15, accumulator, 16, water pump, 17, relay, 18, water pipe one, 19, water pipe two.
Detailed Description
As shown in the figure, a mold cooling system comprises an ECU controller 1, a water storage cooling tank 2, a normally open electromagnetic valve 3, an outlet electromagnetic valve 5, a pressure sensor 6 and an outlet temperature sensor 7, a corrugated pipe 8, a mold 9, a water channel 10, an inlet temperature sensor 12, an inlet electromagnetic valve 13, a pressure accumulator pressure sensor 14, a pressure accumulator 15, a water pump 16, a first water pipe 18 and a second water pipe 19, wherein one end of the first water pipe 18 is communicated with the water storage cooling tank 2 and is immersed below the liquid level, the other end of the first water pipe is communicated with the outlet of the water channel 10 in a sealing mode, the water channel 10 in a coil shape is arranged in the mold 9, the inlet of the water channel 10 is communicated with one end of the second water pipe 19 in a sealing mode, and the other end of the second. From the water storage cooling tank 2 to the inlet of the water channel 10, a water pump 16, a pressure accumulator 15, an inlet electromagnetic valve 13 and an inlet temperature sensor 12 are sequentially connected in series on the second water pipe 19 in a sealing manner, a pressure accumulation port of the pressure accumulator 15 is in sealing communication with the second water pipe 19, and a pressure accumulator pressure sensor 14 is arranged at the communication position. The water pump 16 pumps a part of cooling water from the water storage cooling tank 2 to the pressure accumulator 15 in advance, so that the pressure in the pressure accumulator reaches the upper limit value, the water pump stops working, when the cooling water is required to enter the die for cooling, the cooling water in the pressure accumulator 15 enters the die through the water pipe II 19, when the pressure in the pressure accumulator 15 is reduced to the lower limit value, the water pump is started, the water supply to the die 9 can be maintained, and the cooling water can be continuously pumped into the pressure accumulator 15 until the pressure in the pressure accumulator 15 reaches the upper limit value. The accumulator pressure sensor 14 is used to sense the pressure of the accumulator 15 and transmit a pressure signal to the ECU controller so that it can determine when to activate the water pump. From the water storage cooling tank 2 to the outlet of the water channel 10, a normally open electromagnetic valve 3, an outlet electromagnetic valve 5, a pressure sensor 6 and an outlet temperature sensor 7 are sequentially connected on a first water pipe 18 in series in a sealing manner, a cleaning water pump 4 is arranged on one side of the normally open electromagnetic valve 3, the cleaning water pump 4 is connected with the normally open electromagnetic valve 3 in parallel through a pipeline, and the normally open electromagnetic valve 3, the cleaning water pump 4, the outlet electromagnetic valve 5, the pressure sensor 6, the outlet temperature sensor 7, an inlet temperature sensor 12, an inlet electromagnetic valve 13, an accumulator pressure sensor 14 and a water pump 16 are all electrically connected with the ECU controller 1; the ECU controller 1 is also electrically connected with a controlled end of a relay 17 and the anode of a 5V power supply, and a control end of the relay 17 and a machine tool motor are connected in series in the same circuit; the stamping die further comprises a corrugated pipe 8, and the inlet and the outlet of the water channel 10 are respectively connected with the first water pipe 18 and the second water pipe 19 through the corrugated pipe 8, so that the sealing connection performance of the inlet and the outlet of the water channel 10 with the first water pipe 18 and the second water pipe 19 is kept in the stamping moving process of the die 9. The water storage cooling tank 2 realizes heat dissipation of water stored therein by utilizing natural heat exchange between the water storage cooling tank and outside air. The normally open electromagnetic valve 3 is kept in an open state when not electrified and is closed after being electrified, the outlet electromagnetic valve and the inlet electromagnetic valve are both normally closed electromagnetic valves, and are kept in a closed state when not electrified and are opened after being electrified.
The cleaning process of the water channel of the mold comprises the following steps: during the normal cooling cycle of the mold, the ECU controller continuously detects the temperature values measured by the inlet temperature sensor 12 and the outlet temperature sensor 7, and compares the temperature difference therebetween. When the machine tool works normally, if the temperature difference R is smaller than a set value P, namely R < P, the impurities deposited on the inner wall of the water channel influence the heat dissipation capacity of the die, and the impurities on the inner wall of the water channel are necessary to be cleaned, and then the subsequent water channel cleaning process is carried out; meanwhile, whether the current cleaning interval time from the last time of cleaning the water channel reaches or exceeds a set value is calculated, and if the current cleaning interval time reaches or exceeds the set value, the ECU controller executes a regular cleaning process and enters a subsequent water channel cleaning process. The waterway cleaning process comprises: the ECU controller controls the inlet electromagnetic valve 13 to be closed and keeps the outlet electromagnetic valve 5 open, then the normally open electromagnetic valve 3 is electrified to be closed, the cleaning water pump 4 is electrified, and the cleaning water pump 4 is opened to pump the cooling water in the left water pipe into the water storage cooling tank 2. At this time, the pressure in the water pipe on the left side of the cleaning water pump 4 and the pressure in the water channel of the mold both start to drop, the ECU controller detects the pressure value of the pressure sensor 6, when the pressure value is lower than a set value G, the ECU controller controls the outlet electromagnetic valve 5 to be closed, and then the cleaning water pump 4 is stopped, and the normally open electromagnetic valve 3 is powered off to be opened. Because the mold 9 is higher than the normal temperature (25 ℃) in the working process, the cooling water in the water channel 10 is also higher than the normal temperature, when the pressure value in the water channel 10 is lower than the set value G, a certain vacuum degree is generated in the water channel 10, the boiling point of the cooling water is reduced, and a large amount of bubbles are generated in the cooling water in the water channel 10. Then, the ECU controller controls the water pump 16 to start and generate a certain pumping pressure, the ECU controller controls the opening of the inlet electromagnetic valve 13 to enable the water channel 10 to be communicated with the water pump 16 and the pressure accumulator 15, the pressure in the water channel 10 is instantly changed from being lower than the atmospheric pressure to being higher than the atmospheric pressure, the bubbles generated in the cooling water are exploded under the action of the instantly increased pressure, the impact force generated by the explosion can generate vibration and scouring action on the inner wall of the water channel 10, and therefore impurities deposited on the inner wall of the water channel 10 are vibrated to fall into the cooling water. Then, the ECU controller controls the outlet electromagnetic valve 5 to be opened, the normally open electromagnetic valve 3 is still powered off and keeps an open state, the inlet electromagnetic valve 13 keeps open, and cooling water containing impurities enters the water storage cooling tank 2 and is precipitated at the bottom under the action of the water pump 16. The left water intake of the water pipe II 19 communicated with the water pump 16 is positioned at the middle upper part of the water storage cooling tank 2 and is far away from the bottom of the water storage cooling tank, but the water intake can be ensured to be always submerged below the liquid level of the water storage cooling tank 2. Preferably, a filter is provided at the water intake for filtering impurities in the sucked coolant.
The water channel cleaning method provided by the invention has the advantages that the shutdown of the punching machine tool is not required, and the water channel cleaning process can be completed in the working process of the punching machine tool. Compared with a single stamping process comprising feeding, stamping and blanking, the single cleaning process is shorter in time, the cleaning process can be inserted into the normal cooling circulation process of the die, and the influence on the normal heat dissipation of the die can be avoided. Preferably, the ECU controller is provided with a constant cleaning interval, and the above-described cleaning process may be periodically performed on the mold waterway at a constant interval without detecting the inlet temperature sensor 12 and the outlet temperature sensor 7.
The normal cooling circulation process of the mould is as follows: when the machine tool is started, a motor of the machine tool is electrified, current passes through a control end of a relay 17, a controlled end switch of the relay 17 is closed, the voltage of a pin of an ECU controller 1 connected with the controlled end of the relay 17 is changed from 0V to 5V, the ECU controller 1 judges that the machine tool starts to work, and then an inlet electromagnetic valve 13, an outlet electromagnetic valve 5 and a normally open electromagnetic valve 3 are all controlled to be opened; the ECU controller 1 controls the water pump 16 according to the signal of the pressure accumulator pressure sensor 14, so that the water pump cooperates with the pressure accumulator 15 to drive cooling water to circularly flow among the water pipe II 19, the water channel 10, the water pipe I18 and the water storage cooling tank 2, and the heat of the mold is transferred to the water storage cooling tank 2. The water storage cooling tank 2 realizes heat dissipation of water stored therein by utilizing natural heat exchange between the water storage cooling tank and outside air.
In light of the foregoing description of the preferred embodiments according to the present invention, it is clear that many changes and modifications can be made by the workers skilled in the art without departing from the scope of the present invention, and the technical scope of the present invention is not limited to the contents of the description, but must be determined by the scope of the appended claims.
Claims (1)
1. A cleaning method of a mold cooling system comprises an ECU (electronic control unit) controller (1), a water storage cooling tank (2), a normally open solenoid valve (3), a cleaning water pump (4), an outlet solenoid valve (5), a pressure sensor (6), an outlet temperature sensor (7), a corrugated pipe (8), a mold (9), a water channel (10), an inlet temperature sensor (12), an inlet solenoid valve (13), an accumulator pressure sensor (14), an accumulator (15), a water pump (16), a first water pipe (18) and a second water pipe (19), wherein one end of the first water pipe (18) is communicated with the water storage cooling tank (2) and is submerged below the liquid level, the other end of the first water pipe (18) is communicated with the outlet of the water channel (10), the water channel (10) in a coil shape is arranged in the mold (9), the inlet of the water channel (10) is communicated with one end of the second water pipe (19), and the other end of the second water pipe (19) is communicated with the water storage cooling tank ) A water pump (16), a pressure accumulator (15), an inlet electromagnetic valve (13) and an inlet temperature sensor (12) are sequentially connected on the second water pipe (19) in series in a sealing manner, a pressure accumulation port of the pressure accumulator (15) is communicated with the second water pipe (19), the pressure accumulator pressure sensor (14) is arranged at the communication position, the water pump (16) pumps a part of cooling water from the water storage cooling tank (2) into the pressure accumulator (15) in advance to enable the pressure in the pressure accumulator to reach an upper limit value, the water pump stops working, when the cooling water is required to enter the die for cooling, the cooling water in the pressure accumulator (15) enters the die through the second water pipe (19) and enters the die, when the pressure in the pressure accumulator (15) is reduced to a lower limit value, the water pump is started, water can be supplied to the die (9) and can be continuously pumped into the pressure accumulator (15) until the pressure in the pressure accumulator (15) reaches the upper limit value, the accumulator pressure sensor (14) is used for detecting the pressure of the accumulator (15) and transmitting a pressure signal to the ECU controller, so that it can judge when to start the water pump from the water storage cooling tank (2) to the outlet of the water channel (10), the normally open electromagnetic valve (3), the outlet electromagnetic valve (5), the pressure sensor (6) and the outlet temperature sensor (7) are sequentially connected on the water pipe I (18) in series in a sealing manner, a cleaning water pump (4) is arranged on one side of the normally open electromagnetic valve (3), the cleaning water pump (4) is connected with the normally open electromagnetic valve (3) in parallel through a pipeline, the normally open electromagnetic valve (3), the cleaning water pump (4), the outlet electromagnetic valve (5), the pressure sensor (6), the outlet temperature sensor (7), the inlet temperature sensor (12), the inlet electromagnetic valve (13), the pressure accumulator pressure sensor (14) and the water pump (16) are all electrically connected with the ECU controller (1); the ECU controller (1) is also electrically connected with the controlled end of the relay (17) and the anode of the 5V power supply, and the control end of the relay (17) is connected with a machine tool motor circuit in series; the water channel (10) is connected with the first water pipe (18) and the second water pipe (19) through the corrugated pipe (8);
the method is characterized in that: the cleaning method of the mold cooling system comprises the following steps: firstly, during a normal cooling cycle of the mold, the ECU controller (1) continuously detects temperature values measured by the inlet temperature sensor (12) and the outlet temperature sensor (7), and compares the temperature difference therebetween;
secondly, when the machine tool works normally, if the temperature difference R is smaller than a set value P, namely R < P, the impurities deposited on the inner wall of the water channel influence the heat dissipation capacity of the mold, and the impurities on the inner wall of the water channel are necessary to be cleaned, and then the subsequent water channel cleaning process is carried out;
thirdly, calculating whether the current cleaning interval time from the last time of cleaning the water channel reaches or exceeds a set value, if so, executing a regular cleaning process by the ECU controller, and entering a subsequent water channel cleaning process;
the waterway cleaning process comprises: the ECU controller controls the inlet electromagnetic valve (13) to be closed and keeps the outlet electromagnetic valve (5) open, then the normally open electromagnetic valve (3) is electrified to be closed, the cleaning water pump (4) is electrified, and the cleaning water pump (4) is opened to pump cooling water in the left water pipe into the water storage cooling tank (2); at the moment, the pressure in the water pipe on the left side of the cleaning water pump (4) and the pressure in the water channel of the mold both start to drop, the ECU controller detects the pressure value of the pressure sensor (6), when the pressure value is lower than a set value G, the ECU controller controls the outlet electromagnetic valve (5) to be closed, then the cleaning water pump (4) is stopped, and the normally open electromagnetic valve (3) is powered off to be opened; because the mould (9) is higher than the normal temperature in the working process, the cooling water in the water channel (10) is also higher than the normal temperature, when the pressure value in the water channel (10) is lower than a set value G, a certain vacuum degree is generated in the water channel (10), the boiling point of the cooling water is reduced, and a large amount of bubbles are generated in the cooling water in the water channel (10);
then, the ECU controller controls the water pump (16) to start and generate a certain pumping pressure, the ECU controller controls the opening of the inlet electromagnetic valve (13) to enable the water channel (10) to be communicated with the water pump (16) and the pressure accumulator (15), the pressure in the water channel (10) is instantly changed from being lower than the atmospheric pressure to being higher than the atmospheric pressure, the bubbles generated in the cooling water are blasted under the action of the instantly raised pressure, the impact force generated by blasting can generate vibration and scouring action on the inner wall of the water channel (10), and therefore impurities deposited on the inner wall of the water channel (10) are vibrated to fall into the cooling water;
then, the ECU controller controls the outlet electromagnetic valve (5) to be opened, the normally open electromagnetic valve (3) is still powered off and keeps an open state, the inlet electromagnetic valve (13) keeps open, cooling water containing impurities enters the water storage cooling tank (2) and is precipitated at the bottom under the action of the water pump (16), and a water taking port at the left end of a water pipe II (19) communicated with the water pump (16) is positioned at the middle upper part of the water storage cooling tank (2) and is far away from the bottom of the water storage cooling tank, but the water taking port can be ensured to be always submerged below the liquid level of the water storage cooling tank (2).
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| EP2289694B1 (en) * | 2008-07-25 | 2013-01-09 | Hyundai Steel Company | Press-cure mold cooling device |
| CN104368789B (en) * | 2014-11-24 | 2016-08-31 | 广东鸿图南通压铸有限公司 | A kind of die casting temperature control equipment and control method |
| CN204431676U (en) * | 2015-01-30 | 2015-07-01 | 福建麦凯婴童用品有限公司 | The full-automatic cooling-water machine of a kind of injection machine |
| KR101807257B1 (en) * | 2016-02-11 | 2017-12-08 | (주)코링텍 | Hot press forming apparatus and method thereof |
| CN206510391U (en) * | 2017-03-04 | 2017-09-22 | 傅美芬 | A kind of plastic mould temperature-adjusting device |
| CN206677045U (en) * | 2017-04-13 | 2017-11-28 | 安徽永茂泰汽车零部件有限公司 | A kind of cooling water tank for being used to after auto parts punching press cool down |
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| CN110014092A (en) | 2019-07-16 |
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