WO2005120748A1 - 離型剤噴霧方法、及びダイカスト鋳造用噴霧ユニット - Google Patents
離型剤噴霧方法、及びダイカスト鋳造用噴霧ユニット Download PDFInfo
- Publication number
- WO2005120748A1 WO2005120748A1 PCT/JP2005/010253 JP2005010253W WO2005120748A1 WO 2005120748 A1 WO2005120748 A1 WO 2005120748A1 JP 2005010253 W JP2005010253 W JP 2005010253W WO 2005120748 A1 WO2005120748 A1 WO 2005120748A1
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- WIPO (PCT)
- Prior art keywords
- release agent
- mold
- tube
- spray
- nozzle
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/14—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for separating the pattern from the mould
-
- 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
- B22D17/2007—Methods or apparatus for cleaning or lubricating moulds
Definitions
- the present invention relates to a method of spraying a release agent and a spray unit for die casting, and particularly to spraying an inner surface of a die for die casting by minimizing a spray amount of an oily release agent.
- the present invention relates to a method for spraying a release agent and a spraying unit for die casting.
- the release agent is composed of an oil-based release agent mainly composed of an oil such as animal or vegetable oil or mineral oil, and a water-soluble inorganic compound formed by a water-soluble inorganic compound such as silicone, sodium carbonate, or potassium salt.
- release agents They can be broadly classified into two types: release agents.
- the oil-based release agent is sprayed onto the inner surface of the mold, whereby a film of the oil-based release agent can be uniformly and promptly formed on the inner surface of the mold according to the surface tension. It is possible to exhibit a mold effect. Therefore, in the conventional die-casting process, the use of this oil-based release agent has become the mainstream.
- the above-mentioned oil-based release agent may be heated when the high-temperature molten metal is injected into the mold cavity when the spray amount on the inner surface of the mold is excessive.
- the mold agent sometimes gasified in the cavity. For this reason, the gas generated in the cavity sometimes affected the quality of the die-cast product.
- discharge regulations are established.Usually, wastewater treatment is carried out by chemical or physical methods. Had to be discharged.
- the release agent supply source 102 and the water-soluble release agent 101 of the water-soluble release agent 101 are: A unit body 105 connected to a compressed air supply source 104 for supplying compressed air 103 for spraying by using air pressure, a circular spray tube 106 connected to the unit body 105, and one end of the spray tube 106 It is mainly configured with a connected nozzle section 107.
- the release agent supply source 102 and the compressed air supply source 104 described above are both connected near the connection point of the spray pipe 106 installed in the unit body 105.
- the water-soluble release agent 101 and the compressed air 103 supplied from the respective supply sources 102 and 104 are mixed while passing from the vicinity of the connection point of the unit body 105 of the spray tube 106 to the space 108 inside the spray tube 106. Then, it is sent out toward the nozzle port 109 of the nozzle unit 107.
- the gas-liquid mixture 110 of the water-soluble release agent 101 and the compressed air 103 that has reached the nozzle port 109 is ejected from the nozzle port 109 to the outside, and the die inner surface of the die-casting die (not shown). ) Had been sprayed against.
- about 200 cc of the water-soluble release agent 101 may be sprayed per second, although it differs depending on the area of the spray target and the inner shape of the mold.
- the water-soluble release agent has a disadvantage that the adhesion to the inner surface of the mold is inferior to the oil-based release agent. Therefore, as described above, it was difficult to obtain a sufficient release agent effect unless about 200 cc of a water-soluble release agent was applied per second. In particular, if the mold temperature of the preheated mold during the injection of molten metal exceeds 200 ° C or more, The water-soluble release agent thus obtained became easy to repel on the inner surface of the mold, and the water-soluble release agent sometimes adhered to the inner surface of the mold in a mottled state.
- the water-soluble release agent has been formed mainly of an inorganic compound such as silicone resin, sodium carbonate, and potassium chloride. As a result, some of them were solidified and accumulated in a residue form. As a result, scum accumulates inside the spray tube, and the outflow of the gas-liquid mixture of the water-soluble release agent and the compressed air is not smooth. There was something. As a result, it is necessary to frequently clean the interior of the spray tube and nozzle portion and the inner surface of the mold, and the maintenance cost required for cleaning these components may be higher than that of the oil-based release agent. Was Furthermore, it was found that the water-soluble release agent scattered around the die-casting machine became particularly dirty.
- the present invention provides a method of spraying a release agent, which sprays a minute amount of an oil-based release agent on the inner surface of a mold and can use existing equipment, and a spray for die-casting used therefor.
- the task is to provide units.
- the method of spraying a release agent of the present invention is based on a method in which a release agent passage through which an oil-based release agent can flow and an air passage through which pressurized air can flow are independently formed. Nozzle force of the nozzle connected to the double spray pipe through the release agent passage of the double spray pipe configured to have the double pipe structure described above.
- An oil-based release agent weakly supplying step of supplying the oil-based release agent at a high pressure, a proximity step of bringing the nozzle port close to the inner surface of the opened mold, A pressurized air jetting step of jetting the pumping pressure through the air passage from the nozzle port close to the inner surface of the mold in the approaching step, wherein the pumping air is jetted from the nozzle port.
- the oil-based release agent is It is mainly composed from the spray to "thing.
- the passage air passage, release agent passage
- the oil-based release agent and the compressed air flow in the double spray pipe section and the nozzle section. are formed independently of each other, and both are not mixed up to the nozzle port of the nozzle portion.
- a slight pressure is supplied only to allow the oil-based release agent to reach the nozzle port of the nozzle portion. Then, in this state, the nozzle opening of the nozzle portion is brought close to the inner surface of the die to be sprayed in the approaching step, and the compressed air blowing means is operated to blow the nozzle rocker compressed air.
- the spray unit for die-casting of the present invention is “a spraying unit for die-casting used in the method for spraying a release agent according to claim 1, wherein the release agent for supplying an oil-based release agent is provided.
- a supply unit a unit main body attached to a release agent spraying device connected to a compressed air supply unit for supplying compressed air for spraying the oily release agent, and one end connected to the unit body,
- a mold release agent tube formed with a mold release agent passage through which the oil-based mold release agent supplied from the mold agent supply means is formed, and the mold release agent tube housed in a tube space, a tube inner wall, and the mold release agent
- An air pipe in which an air passage through which the compressed air supplied from the compressed air supply means can flow is formed between outer pipe walls of the pipe, wherein the mold release agent passage and the air passage are independent;
- a double spray pipe section having a double pipe structure, A nozzle portion provided at the other end of the mist tube portion and having a nozzle port communicating with the release agent passage and the air passage, wherein the nozzle agent supply means supplies the nozzle port to the nozzle port.
- the oil-based mold release agent is sprayed onto the inner surface of the mold using suction force generated when the compressed air is ej
- each of the release agent tube and the air tube of the double spray tube portion having the double tube structure is not particularly limited, but is disturbed by the flow of the oil-based release agent and the compressed air. It is desirable to use a circular pipe having a smooth inner peripheral surface with a curved shape so as to prevent the occurrence of cracks.
- a tube material forming these for example, a metal tube made of stainless steel or copper, or a resin tube made of resin such as Shiridani vinyl resin can be appropriately used.
- the release agent tube corresponding to the inner tube and the air tube corresponding to the outer tube may use the same type of material, or may use different types of materials.
- a release agent passage through which the oil-based release agent can flow is formed inside the release agent tube.
- an air passage through which compressed air can flow is formed between the outer wall of the release agent tube and the inner wall of the air tube.
- the unit main body includes a release agent supply means (equivalent to a release agent tank and a pressure feed pump) for supplying an oily release agent sprayed on the inner surface of the mold, and a pressure air supply means (compressed air supply means).
- a release agent supply means (equivalent to a release agent tank and a pressure feed pump) for supplying an oily release agent sprayed on the inner surface of the mold, and a pressure air supply means (compressed air supply means).
- the release agent supplying means is for feeding the oily release agent to the nozzle port provided at the tip of the nozzle portion, and the oily release agent is directed toward the inner surface of the mold at the nozzle rocker of the nozzle portion. It does not provide enough pressure to spray the agent.
- the release agent supply means is only for sending out to the nozzle port by applying pressure, and the value of the pressure is set to a value close to zero, though slightly positive. .
- the oil release agent is supplied again to the nozzle opening so as to compensate only for the consumption of
- the compressed air supply means uses an existing air supply device such as the compressor described above, and sprays the compressed air vigorously toward the outside of the nozzle through the air passage and the nozzle. It is possible to do. That is, the pumping air supplied by the pumping air supply means has a sufficient pumping pressure for spraying the oil release agent toward the inner surface of the mold.
- the spray unit for die casting of the present invention is attached to a die casting machine used in ordinary die casting, and the die casting machine includes a die opening and closing operation. And a basic device such as an injection device for injecting high-temperature molten metal into the mold cavity, and a control device for controlling these various devices.
- the control device is connected to the spraying unit for die-casting of the present invention and includes a function of controlling the spraying unit.
- the control device controls the pumping pressure and timing of the pumping air by the pumping air supply means.
- control is performed. ing. This allows the oil-based release agent to be sprayed by bringing the nozzle portion close to the inner surface of the mold with the mold opened, while the mold is closed and the molten metal is sprayed into the cavity. In this case, the die force can also be moved to the separated position.
- each of the passages of the double spray pipe portion configured to have a double pipe structure by the release agent pipe and the air pipe is formed by the oil-based release agent.
- the pumping air circulates independently and is sent out to the nozzle port of the nozzle part.
- the oil-based release agent can be sprayed toward the outside of the nozzle from the nozzle port cover, although the state in which the oil-based release agent is delivered to the nozzle port of the nozzle section by the release agent supply means is maintained. No strong pressure was applied.
- the pumping air supply means is in a standby state according to the instruction of the control device power of the die casting machine so that the pumping air does not flow in the air passage until the pumping timing.
- the spraying unit for die-casting is moved by the moving means, and the nozzle port of the nozzle portion is moved to the inner surface of the mold.
- the compressed air supply means is operated, and the compressed air is supplied to the nozzle port of the nozzle through the air passage.
- the compressed air that has reached the nozzle portion is instantaneously blown out with the nozzle rocker also directed outward.
- the oil release agent is supplied to the nozzle port as described above. Therefore, a part of the initial oil-based release agent existing near the nozzle port scatters to the outside with the flow of the jet of the compressed air. Furthermore, when the compressed air is ejected from the nozzle rocker, the pressure near the nozzle port decreases with the flow of the compressed air. That is, a state of negative pressure is created. As a result, the oil-based release agent supplied to the nozzle port is sucked out of the nozzle portion by the suction force of the negative pressure.
- the oil-based release agent that has come out of the nozzle port moves toward the inner surface of the mold along the flow of the compressed air, and when it reaches the inner surface of the mold, adheres to the inner surface of the mold due to surface tension.
- the oil-based release agent can be sprayed on the inner surface of the mold only by the pressure of the compressed air. That is, unlike the conventional case, it is not necessary to previously mix an aqueous or oily release agent in a spray pipe or the like and spray from the nozzle port in the state of a gas-liquid mixture of gas and liquid.
- the value of the sending pressure can be kept low.
- the negative pressure of the compressed air is used, even a slight flow of air creates a negative pressure at the nozzle port.
- the amount of oil-based release agent to be sprayed is reduced by the conventional release agent (particularly water-soluble release agent). Agent) can be greatly reduced.
- the oil-based release agent forms a coating on the inner surface of the mold more easily than the water-soluble release agent and has a surface tension characteristic force, the amount of the oil-based release agent adhered to the inner surface of the mold is minimized. In this state, the effect of a sufficient oil-based release agent can be exhibited.
- the spraying unit for die-casting of the present invention may further comprise,
- the main body is detachably attached to the release agent spraying device, and the release agent spraying device is attached to a die casting machine that sprays a water-soluble release agent on the inner surface of the mold.
- the unit main body connected to the double spraying pipe section is detachably formed with respect to the release agent spraying device of the die-casting machine.
- the release agent spraying device a device provided in a die casting machine using an existing water-soluble release agent can be used.
- the spray unit for the water-soluble release agent which is the existing release agent spray device, is removed, and the spray unit for die-casting for the oil-based release agent of the present invention is attached.
- the spraying unit for die-casting of the present invention in addition to the above-mentioned configuration, further comprises: May be done ".
- the pumping pressure of the pumping air supplied by the pumping air supply means is set to 0.2 MPa or more and 0.5 MPa or less.
- the water-soluble release agent and the pumping air for pumping are mixed in advance in the internal space of the spray pipe section (see Fig. 6), and then mixed with the nozzle section. It had to erupt from the tip.
- the pressure of the pumping air had to be set high by the weight of the water-soluble release agent contained in the pumping air.
- the value of the pumping pressure of the large pumping air depends on the spray target and the spray area, and further depends on the type of the water-soluble release agent, but generally ranges from 0.5 MPa to 0 MPa. Set relatively high between 7MPa! Pita.
- the negative pressure suction force generated by the pumping air does not function sufficiently, and the oil-based mold release agent cannot be completely sprayed in the nozzle part. Insufficient amount of oil-based release agent on inner surface. As a result, the effect of the oil-based release agent cannot be obtained.
- the value of the pumping pressure of the pumping air exceeds 0.5 MPa, the above-described problems caused by an excessive oil-based release agent or a water-soluble release agent occur, and a very small amount of the oil-based release agent is used. The advantages of the present invention for spraying the agent are lost.
- the spray unit for die-casting according to the present invention may further comprise, in addition to the above-described configuration, "the double spray tube portion has a cylindrical shape having a diameter of 1.5 mm or more and 3.5 mm or less. And a cylindrical air tube having a tube diameter of not less than 5. Omm and not more than 7. Omm ”.
- the double spray pipe portion is constituted by the release agent tube and the air tube, both of which are formed in a circular tube shape
- the diameter of each tube is set to 1.5 mm or more and 3.5 mm or less for the release agent tube, more preferably 2.Omm or more and 3.Omm or less
- the air tube is set to 5.Omm or more and 7. Omm or less, more preferably 5.5 mm or more and 6.5 mm or less.
- the distance between the air passage through which the compressed air can flow corresponds to the diameter of the release agent pipe arranged near the center of the air pipe space.
- the volume ratio of pumping air and oil-based release agent ejected from the nozzle port will be overwhelmingly higher for pumping air, The oil-based release agent is hardly sprayed.
- the amount of the oil-based release agent adhering to the inner surface of the mold may not be sufficient, and it is necessary to lengthen the time for pumping the compressed air in order to make the amount sufficient.
- the spray unit for die-casting of the present invention sets the pipe diameter of the release agent pipe and the pipe diameter of the air pipe to be within predetermined ranges, respectively, so that the pressure of the pumping air and the spraying of the oil-based release agent are set. It is possible to maintain the balance of the amount and to allow an appropriate oil-based release agent to adhere to the inner surface of the mold.
- the double spray pipe section having a double pipe structure is used for the release agent passage for the oil-based release agent and the air passage for compressed air.
- the oil-based release agent can be sucked out of the nozzle portion by utilizing the negative pressure suction force generated by the compressed air and sprayed on the inner surface of the mold.
- the spray amount of the oil-based release agent can be suppressed, the excessive oil-based release agent is prevented from adhering to the inner surface of the mold, and problems caused by gasification of the oil-based release agent can be solved. it can.
- the unit itself can be used for the existing water-soluble release agent, it is possible to spray a very small amount of oil-based release agent without making major changes to the existing die-casting machine equipment. It can be converted to a spray unit for die casting.
- FIG. 1 is an explanatory diagram showing a schematic configuration of a die casting machine in which a spray unit of the present embodiment is installed.
- FIG. 2 is an enlarged cross-sectional view schematically showing a configuration of a double spray pipe section and a nozzle section of a spray unit.
- FIG. 3 is a partially cutaway perspective view showing a configuration of a double spray pipe portion and a nozzle portion of the spray unit.
- FIG. 4 is a front view showing a configuration of a nozzle unit.
- FIG. 5 is an explanatory diagram showing an example of use of a spray unit.
- FIG. 6 is an explanatory view showing a conventional example of a spray unit for die casting.
- FIG. 2 is an explanatory diagram illustrating a schematic configuration of a die casting machine 5 in which the spray unit 1 of the embodiment is installed
- FIG. 2 is an enlarged cross-sectional view illustrating a configuration of a double spray pipe unit 2 and a nozzle unit 3 of the spray unit 1.
- Fig. 3 is a partially cutaway perspective view showing the configuration of the double spray pipe section 2 and the nozzle section 3
- Fig. 4 is a front view showing the configuration of the nozzle section 3
- Fig. 5 is the use of the spray unit 1.
- FIG. 3 is an explanatory diagram showing an example of the embodiment.
- the die casting machine 5 used in the present embodiment includes a release agent spraying device 6 in which the spraying unit 1 is installed, and a male mold 8a and a female mold which are installed in the machine base 7.
- the mold 8 that can be separated into two molds 8b is opposed to each other with the mold surfaces 9a and 9b spaced apart from each other, and the "mold open state” in which the mold inner surface 4 is exposed to the outside (Fig. 5 ( a)) and the “mold closed state” (see Fig. 5 (b)), in which the mold surfaces 9a and 9b are brought into close contact with each other and a cavity is formed in which a high-temperature molten metal (not shown) is injected.
- the mold opening and closing device 10 opens and closes the mold 8 in the left-right direction (the direction of the arrow A in FIG. 1), and the molten metal is injected into the cavity of the closed mold 8 to form a die-cast product.
- a die casting machine such as an injection device 11, the above-described release agent spray device 6, a mold opening / closing device 10, and a molten metal injection device 11. It mainly includes a control device 12 for controlling various operations of the fifth embodiment.
- the spraying unit 1 of the present embodiment is detachably mounted on the release agent spraying device 6 of the die casting machine 5, and the large release agent spraying device 6 is already installed.
- a type using an existing water-soluble release agent has been used. In other words, it was converted to a die-casting machine 5 of a type that uses an oil-based release agent, while making full use of the equipment assets of the die-casting machine for spraying a water-soluble release agent, and without making significant improvements and design changes. Things.
- the release agent spraying device 6 applies the nozzle portion 3 (of the spraying unit 1 of the present embodiment) to the respective mold inner surfaces 4 of the molds 8 which are in the mold open state by the mold opening / closing device 10.
- the spraying position AP (see Fig. 5 (a)) for spraying the oil-based release agent 13 from the nozzle unit 3
- a nozzle moving device 14 for displacing the spray unit 1 in the vertical direction (the direction of arrow B in FIG. 1) between the separated position BP (see FIG. 5 (b)) where the force near the mold 8 is also separated and retracted.
- a release agent supply device 15 for supplying an oily release agent 13 for spraying from the nozzle portion 3 of the spray unit 1.
- a compressed air supply device 17 for supplying compressed air 16 for spraying.
- the release agent supply device 15 like the release agent spraying device 6 described above, diverts the existing release agent tank and release agent pump when using an existing water-soluble release agent.
- the compressed air supply device 17 can use a compressor or an air supply device stretched in a die casting factory.
- the release agent supply device 15 corresponds to the release agent supply unit in the present invention
- the compressed air supply unit 17 corresponds to the compressed air supply unit in the present invention.
- a mixture of several kinds of mineral oils at a predetermined mixing ratio is used as the oil-based release agent 13.
- the compounding ratio of the oil-based release agent 13 can be appropriately changed depending on the temperature environment at the time of die casting and the type of the die-cast molded product to be molded.
- the spray unit 1 of the present embodiment includes a unit main body 18 connected to the release agent supply device 15 and the compressed air supply device 17 via the release agent spray device 6, and a unit at one end.
- a circular release agent tube 20 formed in the tube and having a flowable release agent passage 19 through which the oil-based release agent 13 supplied from the release agent supply device 15 is connected to the main body 18, and the release agent tube 20.
- a tube having a diameter larger than the diameter of the mold tube 20 is used.
- the mold tube 20 is housed in the space 21 inside the tube, and is fed between the inner wall 22 and the outer wall 23 of the mold tube 20.
- the air passage 24 through which the compressed air 16 supplied from the air supply device 17 can flow has an air tube 25 formed so as to surround the outer periphery of the release agent tube 20.
- the release agent tube 20 and the air tube 25 a double spray pipe section 2 having a double pipe structure, and the other end of the double spray pipe section 2, which is provided with a release agent passage 19 and And and a nozzle portion 3 having a nozzle opening 26 connected with the air passage 25 is mainly composed.
- the release agent tube 20 of the double spray tube section 2 is provided near the center of the inner space 21 of the air tube 25 near the center thereof, the outer wall 23 of the release agent tube 20 and the inner wall 22 of the air tube 25. Are fixed so that they do not come into contact with each other (see Figs. 2 and 3).
- a copper circular pipe having a diameter of 6 mm is used for the air pipe 25, while a copper circular pipe having a diameter of 2.5 mm is used for the release agent pipe 20.
- the oil-based release agent 13 supplied from the release agent supply device 15 and the compressed air supply device 17 are provided.
- the compressed air 16 supplied from the above is independently distributed without mixing between the release agent passage 19 and the air passage 24 formed concentrically inside the double spray pipe section 2 without mixing, It is sent out to the nozzle port 26 of the nozzle section 3.
- only a very weak release agent supply pressure is applied to the oily release agent 13 supplied from the release agent supply device 15, and the oily release agent 13 passes through the release agent passage 19, There is no weak pressure near the nozzle to reach the nozzle 26 of the nozzle 3. In other words, in other words, no strong pressure is applied so that the oil release agent 13 can be sprayed onto the mold inner surface 4 from the nozzle opening 26.
- the unit main body 18 is detachably connected to the release agent spraying device 6.
- the connection portion between the unit main body 18 and the release agent spraying device 6 is connected via the release agent supply device 15 and the compressed air supply device 17 of the release agent spraying device 6 and the unit main body 18 and the unit main body 18. They are connected to the release agent passage 19 of the release agent tube 20 and the air passage 24 of the air tube 25 to be connected, respectively, while maintaining a liquid-tight state and an air-tight state (not shown).
- the oil-based release agent 13 leaks from the release agent passage 19 to the air passage 24, the force of the air passage 24 leaks out of the compressed air 16 to the release agent passage 19, and the air sent out of the air passage 24 to the outside.
- Qi 16 are connected so that there is no leakage.
- a sealing member, a packing member, an O-ring, and the like which are well-known for preventing gas and liquid leakage, are appropriately used for the connection point. I have.
- the nozzle portion 3 provided at the other end of the double spray pipe portion 2 communicates with the mold release agent passage 19 and is oily to the nozzle port 26.
- the nozzle release agent passage 27 for leading out the release agent 13 and the nozzle release agent passage 27 are formed so as to surround the nozzle release agent passage 27, communicate with the air passage 24 of the double spray pipe section 2, and supply the compressed air 16 to the nozzle port 26. It has a nozzle air passage 28 to be led out.
- the spray unit 1 of the present embodiment is a male mold that is separated from each other on the left and right (corresponding to the horizontal direction in FIG. 1) and is open. 8a and female mold 8b to spray simultaneously on each mold inner surface 4 in one spraying operation
- a pair of double spray pipe sections 2 are connected from the unit body 18. Further, at the other end (tip) of each of the double spray pipe sections 2, a pair of nozzle sections 3 each having the spray direction of the nozzle port 26 directed to the mold inner surface 4 to be sprayed is provided. I have.
- the timing of spraying of the oily release agent 13 of the spray unit 1 of the spray unit 1 by the hot release agent spray device 6 is controlled, and the nozzle port 26 of the nozzle unit 3 is moved into the mold by the nozzle moving device 14.
- the movement control for moving the spray position AP close to the surface 4 is performed by the control device 12 of the die casting machine 5 described above.
- the die casting machine 5 used in the present embodiment is designed to obtain the release agent effect on the inner surface 4 of the mold using a water-soluble release agent that is currently mainstream.
- the release agent spraying device 6 and the release agent spraying unit (not shown) attached thereto are also for spraying the water-soluble release agent. Therefore, the existing release agent spray unit for the water-soluble release agent is removed from the unit main body 18 in advance, and replaced with the spray unit 1 for the oil-based release agent 13 of the present embodiment.
- an oily release agent 13 to be sprayed is charged into a release agent tank (not shown) of the release agent supply device 1, and the release agent supply device 15 is operated.
- the oil-based release agent 13 supplied from the release agent supply device 1 is sent to the nozzle port 26 via the unit main body 18, the double pipe spraying section 2, and the nozzle section 3 by a slight supply pressure. (Release agent weak supply step).
- the control device 12 of the die casting machine 5 is operated, and the mold 8 is opened by the mold opening / closing device 10 so that the mold inner surfaces 4 facing each other are exposed to the outside (mold opening). Process). Further, the nozzle moving device 14 is controlled to move the nozzle unit 3 of the spray unit 1 to the spray position AP (proximity process). Then, the pressurized air supply device 17 of the release agent spray device 6 is operated. At this time, the value of the pumping pressure of the pumping air 16 is set to 0.3 MPa. Thereby, the compressed air 16 is sent out from the compressed air supply device 17 and flows through the air passage 24 of the air pipe 25 connected via the unit body 18.
- the release agent passage 19 for the oil-based release agent 13 and the air passage 24 for the compressed air 16 are formed independently. Therefore, the oil-based release agent 13 and the compressed air 16 are not mixed in the double spray pipe section 2. Then, it flows through the air passage 24.
- the pumping air 16 passed through reaches the nozzle port 26 of the nozzle portion 3 and is blown out from the nozzle port 26 toward the mold inner surface 4 (pressing air blowing step). The time from the operation of the compressed air supply device 17 to the ejection of the compressed air 16 from the nozzle port 26 is almost instantaneous.
- the spray unit 1 of the present embodiment is configured to have a pair of double spray pipes 2 and a nozzle 3 with respect to a unit main body 18. Therefore, the single operation described above makes it possible to simultaneously spray the oil-based mold release agent 13 onto the respective mold inner surfaces 4 of the male mold 8a and the female mold 8b, thereby reducing the time required for the spray. be able to.
- the double-tube spraying section 2 and the nozzle section 3 are retracted to the separation position BP (see FIG.
- the spray unit 1 is independently provided on the outer periphery of the release agent passage 19 without directly supplying a strong pressure for spraying the oil release agent 13.
- the film F can be formed by spraying and adhering the oil-based release agent 13 to the mold inner surface 4 by utilizing the negative pressure suction force of the compressed air 16 flowing through the formed air passage 24. Therefore, As shown in Fig. 6, the compressed air 16 and the oil-based release agent 13 (or water-soluble release agent) are mixed in a spray tube (see Fig. 6), and the compressed air 16 Accordingly, it is possible to reduce the possibility that the oil-based mold release agent 13 scatters around the die casting machine 5 and contaminates the installation floor surface.
- the value of the pressure of the compressed air 16 is set to 0.30 MPa. This can be set lower than 0.51MPa to 0.7MPa when the existing water-soluble release agent is used. Furthermore, the spray amount sprayed on the mold inner surface 4 can be reduced from about 200 cc per second to about 0.5 cc to 4.0 cc. As a result, a sufficient release agent effect can be obtained, and the oil release agent 13 does not scatter to the part other than the inner surface 4 of the mold, so that it is possible to reduce costs and the like related to waste liquid treatment thereafter.
- the spray amount sprayed on the mold inner surface 4 can be minimized as described above, so that the mold temperature of the mold 8 preheated by spraying the oil-based release agent 13 can be reduced. can do. As a result, the load applied to the mold 8 can be reduced, the occurrence of heat cracks and the like can be suppressed, and the life of the mold 8 can be extended.
- the diameter of the release agent tube 20 of the double spray tube portion 2 is 2.5 mm, and the diameter of the air tube 25 that accommodates the release agent tube 20 is also To be set to 6.
- Omm The force indicated is not limited to this.
- Release agent tube 20 is not less than 1.5 mm and not more than 3.5 mm, air tube 25 is not less than 5.
- Omm It can be set arbitrarily as long as the oil-based release agent 13 can be sucked using the negative pressure generated by the flow of the compressed air 16.
- the value of the pressure of the pumping air 16 can be arbitrarily set within a range of 0.2 MPa or more and 0.5 MPa or less. Note that the relationship between the diameters of the release agent tube 20 and the air tube 25 and the value of the pumping pressure of the pumping air 16 has a large effect on the suction effect due to the negative pressure. May be required.
- the shape of the nozzle port 26 is changed. Further, it is also possible to use a diffusion type in which the oil-based release agent 13 is diffused and sprayed over a wide area, or a spot type nozzle portion capable of spraying in a concentrated manner at a single location. Further, the shape of the nozzle portion 3 as shown in FIGS. 2 to 4 can be configured in various shapes which are not particularly limited. In the spray unit 1 of the present embodiment, a pair of double spray pipes 2 is provided for the unit body 18 in the present embodiment, but the present invention is not limited to this. The number of double spray pipe sections 2 to be installed and the number of nozzle sections 3 attached to the tip of the double spray pipe section 2 can be appropriately set according to the area and shape of the mold inner surface 4 to be sprayed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Casting Devices For Molds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
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JP2004-168821 | 2004-06-07 | ||
JP2004168821A JP2005342783A (ja) | 2004-06-07 | 2004-06-07 | 離型剤噴霧方法、及びダイカスト鋳造用噴霧ユニット |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010166779A (ja) * | 2009-01-19 | 2010-07-29 | Toshiba Industrial Products Manufacturing Corp | 回転電機のかご形回転子の製造方法及び製造装置 |
CN112620607A (zh) * | 2021-01-29 | 2021-04-09 | 深圳市宝田精工科技有限公司 | 一种压铸模产品高效脱模机构 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4794339B2 (ja) * | 2006-03-29 | 2011-10-19 | 旭テック株式会社 | 鋳型装置、鋳造方法、および塗型方法 |
JP2011005528A (ja) * | 2009-06-26 | 2011-01-13 | Jatco Ltd | ダイカスト鋳造装置及びダイカスト鋳造装置における離型剤噴霧方法 |
JP2011147993A (ja) * | 2010-01-25 | 2011-08-04 | Suga Machine Industry Co Ltd | スプレー装置 |
JP5629718B2 (ja) * | 2012-03-30 | 2014-11-26 | ロボテック株式会社 | スプレー装置 |
JP5574390B2 (ja) * | 2012-10-16 | 2014-08-20 | 株式会社Moresco | 液体供給装置、これを備えた液体供給システム、及びこれらを用いた液体供給方法 |
JP5918115B2 (ja) * | 2012-12-13 | 2016-05-18 | 本田技研工業株式会社 | 金型の離型剤散布装置および離型剤散布方法 |
Citations (1)
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JP2002263795A (ja) * | 2001-03-14 | 2002-09-17 | Ryoei Engineering Kk | ダイカスト機用離型剤噴霧方法及びその装置 |
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JP2002263795A (ja) * | 2001-03-14 | 2002-09-17 | Ryoei Engineering Kk | ダイカスト機用離型剤噴霧方法及びその装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010166779A (ja) * | 2009-01-19 | 2010-07-29 | Toshiba Industrial Products Manufacturing Corp | 回転電機のかご形回転子の製造方法及び製造装置 |
CN112620607A (zh) * | 2021-01-29 | 2021-04-09 | 深圳市宝田精工科技有限公司 | 一种压铸模产品高效脱模机构 |
CN112620607B (zh) * | 2021-01-29 | 2023-03-14 | 深圳市宝田精工科技有限公司 | 一种压铸模产品脱模机构 |
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