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
  • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D39/00—Equipment for supplying molten metal in rations
  • B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume
  • B22D39/023—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume using a displacement member
• • 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
  • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
  • B22D17/10—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with horizontal press motion
• • 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
  • B22D17/30—Accessories for supplying molten metal, e.g. in rations

Definitions

• the present invention relates to a molten metal supply device.
• the biston in the cylinder case by moving the biston in the cylinder case to one side, the molten metal in the melting furnace can be sucked into the cylinder case through the suction / discharge path, and by moving the biston to the other side, the cylinder A melt pump that can discharge the molten metal in the case through the suction and discharge path, a supply path that can supply the molten metal discharged through the suction and discharge path to the manufacturing equipment, and a suction and discharge path that connects the suction and discharge path to the molten metal furnace.
• a switching valve having a movably operable valve body is provided at a suction position for interrupting communication with the passage and a discharge position for communicating the suction and discharge passage with the supply passage so as to cut off the communication between the suction and discharge passage and the melting furnace; By moving the biston to one side while the body is moved to the suction position, the molten metal in the furnace is sucked into the cylinder case, and the piston is moved to the discharge position with the valve body. Transfer to the other The present invention relates to a technique for supplying molten metal that discharges molten metal in a cylinder case to a supply path by a dynamic operation.
• FIG. 15 shows a conventional molten metal supply device, in which a suction / discharge passage 8 for molten metal (hereinafter simply referred to as molten metal) C communicates with the inside of the cylinder case 4, and a screw in the cylinder case 4.
• molten metal hereinafter simply referred to as molten metal
• the molten metal C in the molten metal furnace D can be sucked into the cylinder case 4 through the suction / discharge path 8 by moving the cylinder 5 upward, and the molten metal C in the cylinder case 4 can be sucked and discharged by moving the piston 5 downward.
• a melt pump 1 that can be discharged through a passage 8, a drive device 7 such as a pneumatic cylinder that drives and moves a bistable 5, and a supply passage 2 that supplies the molten metal C discharged through a suction and discharge passage 8 to a type B 1
• a valve box 19 formed such that a suction passage 22 communicating with the melt furnace D, a discharge passage 23 communicating with the supply passage 2 and a suction discharge passage 8 are opened to the valve body moving space 24.
• Discharge path by connecting suction path 22 to suction / discharge path 8 Slide up and down between the suction position where communication between 23 and suction / discharge passage 8 is cut off, and the discharge position where communication between discharge passage 23 and suction / discharge passage 8 connects suction passage 22 and suction / discharge passage 8.
• a switching valve 3 equipped with a valve body 21 with its own moving operation is provided, and a valve stem 20 is operated with a valve stem operating tool 16 using a solenoid or the like.
• the upward movement of the piston 5 with the valve body 21 sliding to the suction position sucks the molten metal C in the molten metal furnace D into the cylinder case 4, 5
• the molten metal C in the cylinder case 4 is discharged to the supply path 2 by moving the biston 5 downward while the valve element 21 is slid to the discharge position. It is configured to do so.
• the biston 5 is moved while the valve body 21 is slid to the suction position.
• the molten metal C in the molten metal furnace D is sucked into the cylinder case 4 by moving it upward, the molten metal C remaining in the supply path 2 passes through the clearance of the sliding portion 100 and the cylinder case 4 side.
• the piston 5 is moved downward while the valve body 21 is slid to the discharge position, and the molten metal C in the cylinder case 4 is removed.
• the molten metal C in the cylinder case 4 may be discharged to the molten metal furnace D through the clearance of the sliding portion 100, and in this case, the moving stroke of the piston 5 There is a drawback that the amount of molten metal C cannot be accurately supplied to the type B1.
• the piston 5 moves during the next supply operation. Even if the molten metal C is discharged to the supply path 2 in an amount corresponding to the stroke, the actual supply amount to the mold B 1 will be insufficient by the amount corresponding to the difference between the liquid level positions. Further, when a part of the molten metal C in the cylinder case 4 is discharged to the molten metal furnace D side through the clearance of the sliding portion 100 when the molten metal C is discharged as shown in FIG. The amount of molten metal C corresponding to the travel stroke of No. 5 cannot be discharged to the supply path 2, and the actual supply amount to the type B 1 is insufficient. This is because become door.
• valve box 19 since the entire valve box 19 is provided below the liquid level of the molten metal C in the molten metal furnace D, the molten metal C entering the valve box 19 is hard to be oxidized, so that between the sliding surfaces.
• This has the advantage of reducing the amount of metal oxides that may enter, but since the suction passage 22 is formed at the bottom of the valve box 19, the metal oxides accumulated at the bottom of the furnace D Disadvantage is that it is easy to inhale into the cylinder case 4.
• the present invention has been made in view of the above circumstances, and accurately supplies an amount of molten metal corresponding to a stroke of movement of a piston to a mold while preventing the metal oxide from being sucked into a cylinder case.
• the purpose is to be able to.
• the suction port of the suction passage should be provided so as to open into the molten metal at a high position in the molten metal furnace. It is necessary to connect a separate pipe to the suction pipe and provide the inlet of the pipe as a suction port at a high position in the melting furnace, which has the disadvantage of complicating the structure.
• the supply device can be connected from the furnace for maintenance and inspection.
• the disadvantage it is difficult to discharge the molten metal that has entered the valve box or supply channel into the furnace when it is raised.
• the present invention has been made in view of the above circumstances, and has a simple structure and a metal oxide.
• the supply device is pulled up from the furnace while the molten metal that is less likely to be mixed into the cylinder case is drawn into the cylinder case, the molten metal that has entered the valve box or the supply path is placed in the furnace.
• the purpose is to allow easy discharge.
• the molten metal supply device integrally connects a valve body as a member to be operated and an operation rod thereof and inserts the valve body and the operation rod vertically so as to be freely movable.
• the lower part of the insertion hole is formed as a valve body moving hole, and the valve body is inserted into the valve body moving hole so that the operation rod projects from the upper end of the insertion hole. Inserting and changing the contact state of the valve body with the inner surface of the valve body moving hole by the operation of moving the operation rod up and down, and having a flow path switching valve configured to switch the flow path of the molten metal,
• the piston as an operation member and its operation rod are integrally connected, and the piston and the operation port are inserted so that they can move up and down.
• the upper end of the insertion hole opens into the molten metal of the melting furnace.
• the lower part of the insertion hole is used as a The piston is inserted into the piston movement hole so that the operation port protrudes from the upper end of the insertion hole, and the contact state of the piston to the inner surface of the piston movement hole is changed by moving the operation port up and down.
• these flow path switching valves and the molten metal pump have an operation rod and an inlet hole.
• the operation rod is inserted into the insertion hole so that a series of gaps are formed between the lower end of the operation rod and the upper end of the insertion hole during the operation.
• Sludge such as metal oxides settles down along the gap between the operation rod and the inlet hole and enters near the operated member, and easily adheres or accumulates on the inner surface of the inlet hole.
• the contact state on the inner surface of the insertion hole is A touch state, there is a drawback that can not be prolonged connection maintained.
• the present invention has been made in view of the above circumstances, and has as its object to maintain a contact state of an operated member on an inner surface of an insertion hole at a desired contact state for a long time. Disclosure of the invention
• the invention according to claim 1 is characterized in that the metal melt suction / discharge path is communicated with the inside of the cylinder case, and the biston in the cylinder case is moved to one side, so that the molten metal furnace A molten metal pump capable of sucking the molten metal in the cylinder case into the cylinder case through the suction / discharge path, and discharging the molten metal in the cylinder case through the suction / discharge path by moving the biston to the other; A supply path for supplying the molten metal discharged through the suction / discharge path to the mold, a suction path communicating with the melt furnace, a discharge path communicating with the supply path, and the suction / discharge path open to the valve body moving space.
• a switching valve provided with a vertically movable valve body at a discharge position for interrupting communication between the passage and the suction / discharge path, wherein the screw in a state where the valve body is moved to the suction position is provided.
• a metal melt supply device configured to discharge the molten metal into the supply path, wherein the entirety of the valve box is provided below the liquid level of the molten metal in the molten metal furnace, and the discharge path is provided. Is formed so as to open upward at the lower end of the valve body moving space, and the suction passage is formed so as to open to the valve body moving space at a position higher than the discharge passage, and the valve of the discharge passage is formed.
• a lower receiving seat is formed in an annular shape around the opening to the body movement space, and a lower contacting portion is formed in the valve body to annularly contact the lower receiving seat as the valve body moves downward. And the lower contact portion is formed annularly on the lower receiving seat.
• the valve element is moved to a suction position where it comes into contact with and interrupts communication between the discharge path and the suction / discharge path, so that molten metal in the molten metal furnace is sucked into the cylinder case. It is in.
• the discharge path is formed in the valve box so as to open upward at the lower end of the valve body movement space.
• a lower receiving seat is formed in an annular shape around the opening, and a lower contacting portion is formed in the valve body to annularly contact the lower receiving seat as the valve body moves downward and downward.
• valve box is provided below the liquid level of the molten metal in the molten metal furnace, and the discharge path is opened upward at the lower end of the valve element moving space while preventing oxidation of the molten metal entering the valve box.
• the suction passage is formed so as to open into the valve body moving space at a position higher than the discharge passage, so that the metal oxides accumulated at the bottom of the melting furnace are sucked into the cylinder case. Hateful.
• the suction passage is formed so as to open downward at an upper end of the valve body moving space, and an upper receiving seat is formed annularly around the opening.
• an upper contact portion that annularly contacts the upper receiving seat is formed on the valve body, and the upper contact portion annularly contacts the upper receiving seat.
• the suction path is formed in the valve box so as to open downward at the upper end of the valve body movement space.
• an upper receiving seat is formed in an annular shape around the opening, and an upper contact portion that annularly contacts the upper receiving seat as the valve body moves up and down is formed in the valve body.
• the valve contact part moves to the discharge position where the part contacts the upper receiving seat in a ring shape to cut off the communication between the suction passage and the suction and discharge passage, and the piston moves to the other side to move the valve inside the cylinder case.
• the metal melt is discharged to the supply path, it is possible to reliably shut off the communication between the suction path and the suction and discharge path, and discharge the metal melt in the cylinder case to the supply path. In this case, the molten metal in the cylinder case can be effectively prevented from being discharged to the furnace.
• the invention according to claim 3 is characterized in that the suction / discharge path of the molten metal is communicated with the inside of the cylinder case, and the piston in the cylinder case is moved to one side, whereby the suction / discharge path of the molten metal in the melting furnace is moved to the suction path.
• a molten metal pump capable of discharging the molten metal in the cylinder case through the suction / discharge passage by moving the piston to the other side so that the molten metal can be discharged into the cylinder case through the suction / discharge passage.
• a valve box having a supply path for supplying the molten metal to the manufacturing apparatus, and a suction path communicating with the molten metal furnace, a discharge path communicating with the supply path, and the suction / discharge path opened in the valve element moving space.
• a switching valve having a vertically movable operable valve attached to a discharge position for interrupting the communication of the valve so that an inlet of the suction passage is opened in the molten metal of the molten metal furnace; By moving the biston to one side in the state of being moved to the suction position, the molten metal in the furnace is sucked into the cylinder case, and the valve body is moved to the discharge position.
• a metal melt supply device configured to discharge the molten metal in the cylinder case to the supply path by the operation of moving the biston to the other side, wherein the suction path is connected to the discharge path.
• a supply path forming member which is formed through the valve box so as to open into the valve body moving space at a higher position, and on which the supply path is formed, is provided from above. Shapes the fitting part to be inserted and removed freely
• the discharge path communicates with the inside of the fitting section, and the supply path forming member is provided inside the fitting section so that the discharge path communicates with the supply path.
• a communication passage communicable with the melting furnace is formed at the bottom of the joint portion at a position lower than the discharge passage so as to penetrate therethrough. The point is that a closing member capable of closing the passage is provided integrally with the supply passage forming member.
• the suction passage is formed through the valve box so as to open into the valve body movement space at a position higher than the discharge passage, a separate pipe for the molten metal suction is connected to the suction passage as before.
• the suction port of the suction passage can be provided so as to open into the molten metal at a high position in the molten metal furnace.
• a fitting portion is formed on the base material provided with the cylinder case so that the supply path forming member forming the supply path can be inserted and removed from above from the upper side, and the discharge path communicates with the inside of the fitting portion.
• the discharge path is provided so as to communicate with the supply path in a state where the supply path forming member is internally fitted in the fitting portion, so that the supply path forming member is fitted when the supply apparatus is pulled up from the melting furnace.
• a communication passage that can communicate with the furnace at a position lower than the discharge passage is formed through the bottom of the fitting portion at a position lower than the discharge passage, and as the supply passage forming member is fitted inside the fitting portion, the communication passage is formed. Since the closing member that can be closed is provided integrally with the supply path forming member, by closing the supply path forming member upward from the fitting section, the communication path is closed and the bottom of the fitting section is released. When the cylinder case is pulled out of the furnace through the communication passage, there is little possibility that the molten metal remains in the fitting portion.
• the invention described in claim 4 is characterized in that the suction / discharge path of the molten metal is communicated with the inside of the cylinder case, and the biston in the cylinder case is moved to one side, whereby the molten metal in the melting furnace is transferred to the suction / discharge path.
• a melt pump capable of discharging the molten metal in the cylinder case through the suction / discharge passage by moving the biston to the other, and discharging the molten metal through the suction / discharge passage.
• a supply path for supplying the molten metal to the casting apparatus, and a suction path communicating with the molten metal furnace, a discharge path communicating with the supply path, and the suction / discharge path are opened to the valve body moving space.
• a switching valve having a vertically movable operable valve attached to a discharge position for interrupting the communication of the valve so that an inlet of the suction passage is opened in the molten metal of the molten metal furnace; By moving the biston to one side in the state of being moved to the suction position, the molten metal in the furnace is sucked into the cylinder case, and the valve body is moved to the discharge position.
• the cylinder A supply device for a molten metal configured to discharge the molten metal in one space to the supply path, wherein the suction path is opened to the valve body moving space at a position higher than the discharge path.
• a fitting portion that penetrates through the valve box and that is provided with the cylinder case is formed with a fitting portion into which the valve box is inserted so as to be able to be inserted and removed from above, and the supply path is formed by the fitting portion.
• the supply path is provided so as to communicate with the discharge path in a state where the valve box is internally fitted to the fitting section.
• a communication member that can communicate with the melt furnace at a low position is formed to penetrate, and a closing member that can close the communication passage is fitted to the valve box as the valve box is internally fitted to the fitting portion. The point is that they are provided integrally.
• the suction passage is formed through the valve box so as to open into the valve body movement space at a position higher than the discharge passage, a separate pipe for the molten metal suction is connected to the suction passage as before.
• the suction port of the suction passage can be provided so as to open into the molten metal at a high position in the molten metal furnace.
• a fitting portion is formed for internally fitting the valve box so that it can be inserted and removed from above, and the supply path is communicated with the inside of the fitting portion, so that the valve box is connected to the fitting portion.
• the valve box is pulled out from the fitting part, so that it enters the valve box when the supply device is pulled out of the furnace.
• the molten metal can be discharged into the furnace through the discharge path, and the supply path communicates with the molten furnace at the fitting part, and the metal flowing into the supply path.
• the genus molten metal can be discharged into the molten metal furnace.
• a communication passage that can communicate with the melting furnace at a position lower than the supply path is formed through the bottom of the fitting part, and the communication path can be closed as the valve box is fitted inside the fitting part. Since the closing member is provided integrally with the valve box, by closing the valve box upward from the fitting portion, the communication passage is closed. When the cylinder case is pulled out of the furnace, there is little danger that the molten metal will remain in the fitting area.
• the present invention is characterized in that the closing member is provided so as to fit into the communication passage as the fitting portion is fitted inside.
• the closing member When the supply path forming member or the valve box is fitted into the fitting portion from above, the closing member also fits into the communication path, the opening thereof is closed, and the supply path forming member or the valve box is fitted. With the operation of pulling out the upper part from the part, the closing member is also pulled out from the communication passage and the closing is released.
• the operation of inserting and removing the supply path forming member or the valve box in one direction in the vertical direction with respect to the fitting portion can easily close or release the communication path.
• the invention according to claim 6 is characterized in that the operated member and the operation rod are integrally connected, and the insertion hole into which the operated member and the operation rod are vertically movably inserted is formed.
• the operation member is inserted into the insertion hole together with the operation rod so that the operation rod protrudes from an upper end of the insertion hole by providing the upper end so as to open into the molten metal of the melting furnace.
• the operated rod is moved up and down by the operation rod.
• a metal melt supply device provided by vertically moving a member to change a contact state with an inner surface of an insertion hole, wherein an outer peripheral portion of the operation rod is provided between the operation rod and the insertion hole.
• a scraper is provided which slides over substantially the entire circumference with respect to the inner peripheral surface of the inlet hole in accordance with the vertical movement operation of the operation rod.
• a scraper is provided on the outer periphery of the operation port to block the gap between the operation port and the insertion hole, sludge such as metal oxides generated near the liquid level of the molten metal in the smelting furnace It becomes difficult to get into the vicinity of the operated member, and the scraper slides almost all around the inner peripheral surface of the insertion hole as the operation rod moves up and down. Even if it enters between the head and the insertion hole and adheres or accumulates on the inner surface of the insertion hole, the sludge can be removed, and the contact state of the operated member with the inner surface of the insertion hole can be changed to a desired contact state. And can be maintained for a long time.
• the invention according to claim 7 is characterized in that the scraper is provided so as to move near the upper end of the insertion hole in a state where the operated member has moved to the upper end of the vertical movement range.
• the scraper moves near the upper end of the insertion hole with the operated member moved to the upper end of the vertical movement range, the sludge removed by the scraper can be positively returned to the molten metal in the smelting furnace.
• the contact state of the operated member with respect to the inner surface of the insertion hole can be efficiently maintained at a desired contact state for a long period of time.
• the invention according to claim 8 is characterized in that, in configuring the scraper, a ceramic ring member formed into a C shape by dividing one portion in a circumferential direction is provided on an outer peripheral portion of the operation port pad.
• the ring member is fitted in the insertion hole in a state where the ring member is elastically deformed inward in the radial direction and the ring member is elastically deformed.
• the ring member is formed of ceramic, the “seizing” and “galling” caused by the relative sliding between the ring member and the inner peripheral surface of the insertion hole, such as when the ring member is formed of metal, are performed. This makes it possible to efficiently remove sludge over a long period of time while pressing the ring member against the inner peripheral surface of the insertion hole with elastic restoring force.
• the valve is configured to be able to switch the flow path of the molten metal by moving the inside of the hole up and down to change the contact state with the inner surface of the valve moving hole.
• the lower part of the insertion hole is formed in a piston movement hole, and the operated member is moved by the operation rod up and down operation to move the piston.
• the piston is constituted of bistons capable of sucking and discharging the molten metal inside and outside the piston transfer hole. At one point.
• the piston that constitutes the operated member is inserted into the piston movement hole that forms the lower part of the insertion hole so that the operation rod projects from the upper end of the insertion hole, and the operation rod is moved up and down.
• the metal melt can be sucked and discharged over the inside and outside of the hole for moving the biston.
• a scraper is provided on the outer periphery of the operation port of the biston. Is provided, so that the contact position of the piston on the inner surface of the piston moving hole can be changed to a desired contact position, that is, the piston is slid with the desired stroke on the inner surface of the piston moving hole. This state can be maintained for a long time, and the molten metal can be accurately drawn and discharged over the inside and outside of the biston transfer hole.
• FIG. 1 is a partial cross-sectional side view of a metal melt supply device
• FIG. 3 (a) is a perspective view of a main part
• Fig. 3 (b) is a vertical sectional view of the main part
• FIGS. 4 (a) and (b) are partial cross-sectional side views of a main part showing the second embodiment
• FIGS. 5 (a) and (b) are main parts showing the third embodiment
• 6 (a) and 6 (b) are partial cross-sectional side views of an essential part showing the fourth embodiment
• FIG. 7 is a partial sectional side view of the fourth embodiment. Sectional view,
• FIG. 8 is a perspective view of a main part of the fourth embodiment
• FIG. 9 is a sectional view of a main part of the fourth embodiment.
• FIG. 10 (a) is a perspective view of a main part showing a sixth embodiment
• FIG. 10 (b) is a cross-sectional view of a principal part showing a sixth embodiment
• FIG. 11 is a partial cross-sectional side view of a main portion showing a seventh embodiment
• FIG. 12 is a partial cross-sectional side view of a main part of the seventh embodiment
• FIG. 13 is a perspective view of an essential part showing an eighth embodiment
• FIGS. 14 (a) and (b) are partial cross-sectional side views of a main part showing a ninth embodiment
• FIGS. 15 (a) and (b) are partial cross-sectional side views showing a conventional technique.
• Fig. 1 shows a supply device A that supplies a molten metal C of magnesium alloy as an example of a molten metal to a mold B1 of a molding apparatus B, and supplies a molten metal pump 1 and a molten metal C to a mold B1.
• a switching valve 3 for switching the flow path between a state in which the molten metal C in the molten metal furnace D can be drawn into the molten metal pump 1 and a state in which the molten metal C drawn into the molten metal pump 1 can be discharged into the supply path 2. Is provided so that the melt C discharged from the melt pump 1 can be supplied to the mold B 1 through the supply path 2.
• the melt pump 1 is integrally formed with a ceramic (silicon nitride) cylinder case 4, a ceramic (silicon nitride) piston 5 that can reciprocate up and down within the cylinder case 4, and a piston 5.
• a piston driving pneumatic cylinder 7 for reciprocating a certain piston rod 6 up and down is provided, and the suction and discharge path 8 for the molten metal C is communicated near the bottom of the cylinder case 4 to move the piston 5 upward.
• the molten metal C in the molten metal furnace D can be sucked into the cylinder case 4 through the suction / discharge passage 8, and the molten metal C in the cylinder case 4 can be discharged through the suction / discharge passage 8 by moving the biston 5 downward. It is provided as possible.
• the cylinder case 4 has a cylinder chamber 12 formed by closing a lower opening of a through hole 10 for forming a cylinder chamber formed in a case body 9 made of ceramic by a cylinder plug 11 made of ceramic.
• the base plate 14 fixed to the furnace lid 13 of D and the outer peripheral side of the case body 9 are connected by a connecting arm 15 made of ceramic (silicon nitride), and the entire cylinder case 4 is
• the support table 17 supporting the pneumatic cylinder 7 for driving the biston and the pneumatic cylinder 16 for operating the valve is fixed to the lower part of the molten metal C at a position lower than the liquid level elevation range of the molten metal C. It is fixed at 14.
• the switching valve 3 forms a valve box 19 with the case body 9, and the entire valve box 19 is lower than the liquid level raising / lowering range of the molten metal C in the molten metal furnace D.
• a valve body 21 made of ceramic (silicon nitride) integrally provided with a valve stem 20 and provided below the liquid level is mounted on the valve box 19 so as to be movable up and down.
• a suction passage 22 communicating with D, a discharge passage 23 communicating with the supply passage 2 and a suction / discharge passage 8 are formed so as to open to the valve body moving space 24.
• the valve body moving space 24 has a cylindrical shape into which the valve body 21 can be inserted and removed.
• the valve body mounting hole 25 is formed in the case body 9 and a sleeve 26 is inserted and fixed in the upper inner peripheral surface of the valve body mounting hole 25 so as to be freely inserted and removed. It is formed at the valve body mounting hole.
• the discharge passage 23 is formed so as to open upward at the lower end of the valve element moving space 24, and a suction through hole 27 extending between the case body 9 and the sleeve 26 is formed.
• a suction passage 22 opening downward at the upper end of the valve body movement space 24 which is a higher position than the suction passage 22 is formed by the suction through hole 27 and the inside of the sleeve 26, and the suction port of the suction passage 22 is formed.
• the discharge path 23 is formed in a ceramic (silicon nitride) discharge path forming member (an example of a base material) 33 fixed to the case body 9 by bolts, and is opened at the bottom of the valve body moving space 24.
• the supply path 2 is connected to the discharge path 23 by connecting a ceramic cylindrical supply pipe (an example of a supply path formation member) 34 to the discharge path formation member 33.
• a ceramic cylindrical supply pipe an example of a supply path formation member
• a downwardly facing upper receiving seat 30 is formed in an annular shape around the lower end surface of the sleeve 26, and the lower receiving seat 29 is annularly contacted with the lower receiving seat 29 as the valve body 21 moves downward.
• a portion 31 and an upper contact portion 32 that annularly contacts the upper receiving seat 30 with the upward movement of the valve 21 are formed on the valve 21.
• the upper contact portion 32 is separated from the upper receiving seat 3 ⁇ by the expansion and contraction operation of the valve operating pneumatic cylinder 16, and the suction passage 22 is connected to the suction / discharge passage 8.
• the lower contact portion 31 is separated from the lower receiving seat 29 to allow the discharge passage 23 to communicate with the suction / discharge passage 8, and the upper contact portion 32 contacts the upper receiving seat 30 in an annular shape.
• the valve body 21 is provided so as to be able to move up and down freely, and as shown in FIG.
• the biston 5 upward with the cylinder moved to the suction position, the molten metal C in the molten metal furnace D passes through the suction path 22 and the suction
• the molten metal in the cylinder case 4 is moved by moving the biston 5 downward with the valve body 21 moved to the discharge position, as shown in Fig. 2 (b).
• C is discharged to the supply path 2 through the suction / discharge path 8 and the discharge path 23 to be supplied to the type B 1.
• a circular fitting hole (an example of a fitting portion) 36 in a plan view, in which the supply pipe 34 is inserted into the discharge path forming member 33 in a positioning state so that the supply pipe 34 can be inserted and removed from above, is provided.
• the discharge passage 23 communicates with the inside of the fitting hole 36, and the fitting hole 36 is formed to penetrate vertically along the insertion and removal direction of the supply pipe 34 to form the fitting portion 3.
• a communication passage 37 is formed at a position lower than the discharge passage 23 and can communicate with the molten metal furnace D.
• a pipe end closing member 38 made of ceramic (silicon nitride) for closing the lower end of the supply pipe 34 is integrally formed, and a through hole 39 is formed in a pipe wall near the pipe end closing member 38 to supply the material.
• the discharge path 23 is provided so as to communicate with the supply path 2 with the pipe 34 fitted in the fitting hole 36.
• the lower end 40 of the supply pipe is fitted into the communication path 37 as the supply pipe 34 is fitted inside the fitting hole 36, and the communication path 37 is closed. As a member, it is provided integrally with the supply pipe 34.
• FIG. 4 shows a main part of another embodiment of the supply device A, in which the supply pipe 34 is connected to the supply path forming member 44 communicating with the discharge path 23, and the inner surface of the sleeve 26 is formed.
• the valve body 41 which is slidable up and down, is provided on the valve rod 20. As shown in FIG. 4 (a), the valve body 41 comes out of the sleeve 26 and the suction passage 22 is formed. In addition to the suction position, which communicates with the suction / discharge passage 8, the lower contact portion 31 abuts the lower receiving seat 29 in a ring shape to cut off the communication between the discharge passage 23 and the suction / discharge passage 8, and FIG.
• the lower contact portion 31 is separated from the lower receiving seat 29 to allow the discharge passage 23 to communicate with the suction / discharge passage 8, and the valve body 41 fits into the sleeve 26.
• a valve body 21 is provided at a discharge position where the communication between the suction path 22 and the suction / discharge path 8 is interrupted so as to be vertically movable.
• Fig. 5 shows a magnesium alloy melt C as an example of a metal melt
• the supply pipe 34 is connected to the supply path forming member 44 communicating with the discharge path 23, and the switching valve 3 is provided so as to be able to be inserted into and removed from the case body 9 from above.
• a discharge passage 23 communicating with the furnace 2 and a suction passage 8 are opened at the bottom of the valve body moving space 24, and a suction passage 22 communicating with the melting furnace D is connected to a discharge passage 23. It is formed so as to open above the valve body moving space 24 which is a higher position.
• a circular fitting hole (an example of a fitting portion) 43 is formed in the base material 42 extending from the lower portion of the case body 9 so that the valve box 19 can be inserted and removed from above in the positioning state. Then, the middle of the suction / discharge passage 8 is communicated with the inside of the fitting hole 43, and the supply passage forming member 44 made of ceramic (silicon nitride) is fixed to the base material 42 by bolts.
• the suction / discharge passage 8 extends between the cylinder chamber 12 and the valve body moving space 24 with the valve box 19 fitted inside the fitting hole 43 with the valve box 19 in communication with the inside of the fitting hole 43. It is provided so as to communicate with the supply passage 2 and the discharge passage 23.
• a communication passage 45 capable of communicating with the melting furnace D at a position lower than the supply passage 2 is formed so as to penetrate vertically along the insertion and removal direction of the valve box 19, and the valve box 19
• a closing member 46 that can be fitted into the communication passage 45 and close the communication passage 45 is projected. It is set up.
• Fig. 6 shows the molten metal pump 1 and the switching valve 3 provided in the supply device A that supplies molten metal C (metal melt) C such as a magnesium alloy, an aluminum alloy, or a zinc alloy as an example of the molten metal to the production device B.
• molten metal C metal melt
• FIG. 6 shows the molten metal pump 1 and the switching valve 3 provided in the supply device A that supplies molten metal C (metal melt) C such as a magnesium alloy, an aluminum alloy, or a zinc alloy as an example of the molten metal to the production device B.
• a piston ring 74 as a sealing ring E according to the present invention is mounted on a piston 5 of the molten metal pump 1, and a valve stem 20 of a switching valve 3 is mounted on a piston 20 of the switching valve 3.
• a scraper 71 is provided.
• the bistone ring 74 is a heat-resistant material 81 having a rectangular cross section formed by sintering a silicon nitride material, and is a C-shape obtained by dividing one portion in the circumferential direction.
• a pair of cylinder case 4 and a pair of members are provided so as to be reciprocally movable in one direction.
• the thickness T of the heat-resistant material 81 along the radial direction of the ring is set to a length of 0.02 to 0.2 times the outer diameter K of the ring, and the ring shaft of the heat-resistant material 81 is also set.
• the width dimension H along the core X direction is set to 0.2 times or more and 1.5 times or less the thickness dimension T.
• the switching valve 3 is formed by integrally forming a spool-type valve element (an example of a member to be operated) 21 and its valve rod (an example of an operation port) 20 with ceramic (silicon nitride). And an insertion hole 62 into which the valve element 21 and the valve rod 20 are vertically movably inserted.
• the upper end of the insertion hole 62 is below the liquid level lower than the liquid level elevation range of the molten metal C in the molten metal furnace D.
• the valve body 21 is inserted into the insertion hole 62 together with the valve stem 20 so that the valve stem 20 projects upward from the upper end of the insertion hole 62 so that the valve stem 20 is provided in the case body 9 so as to be opened. It is composed.
• the insertion hole 62 has a shape in which an upper large-diameter insertion hole 63 and a lower small-diameter insertion hole 64 are connected by a taper hole 65 whose inner diameter changes in a taper shape.
• the lower end of the small-diameter insertion hole 64 is closed with a valve plug 66, and the valve-moving hole is composed of the small-diameter insertion hole 64. 2 next to the molten metal suction passage
• the molten metal discharge path 23 and the suction / discharge path 8 communicating with the supply pipe 34 are formed vertically so as to open to the valve body moving hole 64, and inserted into the molten metal furnace D with a large diameter.
• a communication passage 67 communicating with the hole 63 is formed laterally.
• the valve body 21 has a C-shaped ceramic (silicon nitride) seal ring 68 formed in the same manner as the bistone ring 74 shown in FIG. It has a pair of upper and lower valve bodies 69, 70 provided so as to be in sliding contact with the surface, and the valve body 21 is moved by moving the valve stem 20 up and down by operating the pneumatic cylinder 16 for valve operation.
• the suction passage 22 is communicated with the suction / discharge passage 8, and the communication between the discharge passage 23 and the suction / discharge passage 8 is connected to the lower valve body as shown in FIG. 6 (a).
• 6 (b) the discharge path 23 is connected to the suction and discharge path 8, and the discharge path 23 and the large-diameter insertion hole 6 3 are connected.
• the upper valve body 69 cuts off the communication with the intake valve 22 and the lower valve 70 blocks the communication between the suction passage 22 and the suction / discharge passage 8 (hereinafter referred to as the discharge position).
• the discharge position contacts to inner surface of transfer hole The flow of the molten metal C can be switched by changing the contact state.
• the outer circumference of the valve stem 20 is closed between the valve stem 20 and the large-diameter insertion hole 63, and the inner periphery of the large-diameter insertion hole is moved with the vertical movement of the valve stem 20.
• a scraper 71 sliding substantially over the entire circumference is provided so as to move near the upper end of the large-diameter insertion hole 63 with the valve body 21 moved to the upper end of the vertical movement range.
• the scraper 71 mounts a ring member 72 made of ceramic (silicon nitride) in an annular groove 20a formed on the outer peripheral portion of the valve stem 20 in a state where it can be prevented from falling off.
• a ring member 72 made of ceramic (silicon nitride) in an annular groove 20a formed on the outer peripheral portion of the valve stem 20 in a state where it can be prevented from falling off.
• the sludge can be wiped off by the vertical sliding movement of the ring member 72 with respect to the inner peripheral surface of the large-diameter insertion hole accompanying the operation of the valve element 21.
• the ring member 72 is formed into a C shape in which one portion in the circumferential direction of the ring is cut off at a substantially constant width to form a C shape and elastically deform in the radial direction.
• the ring member 72 is elastically deformed inward in the radial direction (diameter reduction direction), and is fitted into the large-diameter insertion hole 63. ⁇ It is pressed against the inner peripheral surface of the inlet hole.
• the end face ⁇ 3 of the cut portion of the ring member 72 is formed obliquely along the circumferential direction, and the end faces 733 can be relatively moved along the circumferential direction with the end faces 73 facing each other in the sliding direction. Since it is provided, it is possible to effectively prevent the sludge from entering the valve element 21 side along with the molten metal C through the cut portion of the ring member 72.
• the cylinder case 4, the piston 5, the piston rod 6, the piston ring 74, the connecting arm 15, the valve 21, the valve stem 20, the seal ring 68, the ring member 7 2 is made of silicon nitride.
• a steel-based material such as SKD may be used. good.
• a metal material such as titanium (T i) and titanium carbide (T i
• T i titanium carbide
• a biston ring 74 formed of a heat-resistant material 81 obtained by sintering a composite material with a ceramic material such as C) may be provided.
• FIG. 10 shows another embodiment of a biston ring 74 as a sealing ring E.
• the cross-sectional shape of the heat-resistant material 81 is defined by two sides 8 la, parallel to each other along the ring axis X direction.
• the long side 81b of the two parallel sides 81a and 81b is connected to the piston (the other side) as shown in Fig. 10 (b).
• the dovetail groove 5b which is formed annularly on the outer periphery of 5, is fitted to the cylinder case (one side) on the shorter side 81a side of two parallel sides 81a, 81. It is configured to be pressed against 4).
• Other configurations are the same as those of the fourth or fifth embodiment.
• FIG. 11 shows another example of the molten metal pump 1 shown in the fourth embodiment.
• the cylinder case 4 has a lower opening 82 and a ceramic (nitridation) whose lower opening 82 is opened in the molten metal C of the molten metal furnace D.
• the seventh embodiment is configured by providing a cylindrical case body 9 made of silicon) and a circular case top plate 83 made of ceramic (silicon nitride) for closing an upper opening of the case body 9.
• a cylinder chamber 12 is formed in a case body 9 between a piston 5 made of ceramic (silicon nitride) and a case top plate 83 provided with a biston ring 74 similar to that shown in FIG.
• An intake / discharge passage 8 communicating with the chamber 12 is formed.
• a cylindrical spacer 84 is integrally formed at the upper end of the case body 9, and the cylindrical spacer 84 is fixed to the furnace lid 13 of the melting furnace D. It is fixed so that it sinks into the melt C at a position lower than the lowest liquid level L in the melt rise and fall range of the melt C in the melt furnace D.
• a cylindrical member 85 made of ceramic (silicon nitride) that presses the case top plate 83 against the case body 9 from above is fixed to the upper part of the cylindrical spacer 84, and the piston rod 6 is moved up and down.
• a bearing member 87 made of ceramic (silicon nitride) having a freely supporting bearing tube portion 86 is fixed so as to cover the inside of the cylindrical member 85, and the bearing tube portion 86 and the case top plate are fixed. 8
• the piston rod 6 is inserted into the through hole 8 8 formed in 3 so that it can reciprocate up and down, and the piston rod 6 is reciprocated up and down by the piston rod 6 to reciprocate.
• the molten metal C sucked into the cylinder chamber 12 through the passage 8 is discharged to the supply pipe 34 through the suction / discharge passage 8 so as to be supplied to the manufacturing apparatus B.
• the sealing ring E according to the present invention is moved in the direction of movement between the pair of members, the bistone rod 6 and the case top plate 83, which are provided so as to be relatively reciprocally movable in one direction.
• the peripheral surface is elastically deformed in the radially expanding direction so that the peripheral surface is pressed against the piston rod (one member) 6 by an elastic restoring force between the opposing surfaces opposing each other in the orthogonal direction
• the case top plate Fits into an annular groove 89 formed in the inner peripheral portion of the through hole 88 so that the piston rod 6 can be installed in a state where relative movement in the reciprocating movement direction with respect to 83 is prevented.
• the ring outer diameter K of the sealing ring E and the heat-resistant material 8 have different thickness T along the ring radial direction and the width H along the ring axis direction.
• samples 1 to 13 mounted on the piston 5 of the molten metal pump 1 shown in the seventh embodiment as a piston ring 74, and continuously operated for each sample. The operating time until 16 was damaged or seized to the cylinder case 4 and stuck was investigated.
• SN of the material indicates a ceramic obtained by sintering silicon nitride having a hardness of 90 HRA and a density of 3.2
• MC of the material is titanium (T i) and titanium carbide (T i C Metal ceramics obtained by sintering the composite with ()) are shown.
• FIG. 13 shows another embodiment of the ring member 72, in which the end faces 73 of the dividing sections are extended along the circumferential direction with a circumferential end face part 73a and the circumferential end faces thereof. It is formed into a hook shape with a sliding end face portion 73b which is long in the sliding direction at both ends of the portion 73a, and is opposed to the sliding direction with elastic deformation in the radial direction.
• the circumferential end surfaces 7 3a are configured to slide along the circumferential direction, so that the slurry together with the molten metal C passes through the splitting point of the ring member 72 and the valve 21 side and the piston. 5 can be effectively prevented from entering.
• FIG. 14 shows a main part of another embodiment of the supply device A for supplying the molten metal (molten metal) C to the production device B.
• the valve element of the switching valve 3 (an example of a member to be operated) 2 1
• the insertion hole 62 for inserting the valve stem (an example of an operation rod) 20 with the small-diameter insertion hole 90 on the upper side and the large-diameter insertion hole 91 on the lower side are inserted in the same manner as in the seventh embodiment. It is provided with a shape that is connected by a single hole, and the valve body moving hole is formed from the middle position in the vertical direction of the small-diameter insertion hole 90 to the large-diameter insertion hole 91, and is connected to the supply pipe 34.
• the molten metal discharge passage 23 is opened at the bottom of the large-diameter inlet hole 91, and the suction-discharge passage 8 is formed at the middle of the large-diameter inlet hole 91 in the vertical direction.
• a molten metal suction passage 22 that communicates the inside with the small-diameter insertion hole 90 is formed laterally.
• the valve body 21 has a lower sliding valve body portion 92 provided so that a C-shaped ceramic seal ring 68 is in sliding contact with the inner peripheral surface of the small-diameter insertion hole 90, and a large-diameter insertion hole.
• 9 1 and a contact valve body 9 3 which contacts the valve seat 9 4 formed at the bottom of the valve 1, and the valve 21 is moved up and down by the operation of the valve stem 20 by operating the pneumatic cylinder 16 for valve operation.
• the suction path 22 is communicated with the suction / discharge path 8, and the communication between the discharge path 23 and the suction / discharge path 8 is established by the contact valve body 93.
• the flow path of the molten metal C can be switched by changing the state of contact with the inner surface of the valve moving hole when the valve is closed by the valve body 92 (hereinafter referred to as the discharge position).
• An upper sliding valve body 95 is provided above the lower sliding valve body 92, and a valve stem is provided.
• the seal ring 68 which slides almost all around the inner peripheral surface of the small-diameter insertion hole with the vertical movement operation of 20, moves the seal ring 68 to the small diameter with the valve body 21 moved to the upper end of the vertical movement range. It is provided to move near the upper end of the insertion hole 90.
• the melt pump 1 has a piston (an example of a member to be operated) 5 equipped with a ceramic (silicon nitride) biston ring 74 and a piston rod (an example of an operation port).
• 6 is formed integrally with ceramic (silicon nitride) and connected substantially concentrically, and a through hole for forming a cylinder chamber (an example of an insertion hole) into which the piston 5 and the piston rod 6 are vertically movably inserted.
• 10 is provided in the case body 9 with a substantially constant inner diameter so that the upper end opens below the liquid level lower than the liquid level elevation range of the molten metal C in the molten metal furnace D, and the piston port 6 is a cylinder.
• the piston 5 is inserted into the cylinder chamber forming through hole 10 together with the piston rod 6 so as to protrude upward from the upper end of the chamber forming through hole 10.
• the cylinder chamber forming through hole 10 is closed at its lower end with a cylinder plug 11, and the piston moving hole is formed at a lower portion of the cylinder chamber forming through hole 10, and a piston driving pneumatic cylinder is formed.
• the valve 21 With the piston rod 6 moved up and down by the operation of 7 to move the piston 5 up and down, as shown in Fig. 14 (a), the valve 21 is moved to the suction position.
• the molten metal C in the molten metal furnace D is sucked into the hole for biston movement, and the valve element 21 is moved to the discharge position.
• the biston 5 downward in the moved state, the molten metal C in the biston transfer hole is discharged to the supply pipe 34.
• the biston rod 6 is composed of a small-diameter rod 75 connected to the pneumatic cylinder 7 for driving a biston, and a large-diameter rod 76 formed by extending the piston 5 upward.
• a small-diameter rod 75 connected to the pneumatic cylinder 7 for driving a biston
• a large-diameter rod 76 formed by extending the piston 5 upward.
• the space between the large diameter rod 76 and the through hole 10 for forming the cylinder chamber is closed, and the cylinder chamber is moved in accordance with the vertical movement of the piston rod 6. Close the upper end of the cylinder chamber forming through hole 10 with the piston 5 moved to the upper end of the vertical movement range with the scraper 71 sliding over the entire circumference of the inner surface of the forming through hole. It is provided to move to.
• the scraper 71 includes a ceramic (silicon nitride) ring member 72 formed by dividing one portion in the circumferential direction and forming a C-shape in the same manner as that described in the fourth embodiment.
• the ring member 7 2 is attached to the outer periphery of the In a state of being elastically deformed to one side, it is fitted inside the through hole 10 for forming the cylinder chamber, and is pressed against the inner peripheral surface of the through hole for forming the cylinder chamber.
• the apparatus for pouring molten metal according to the present invention may be a device for pouring molten metal such as aluminum, zinc, and tin into a small shape.
• a communication passage capable of communicating with the molten metal furnace may be formed so as to penetrate the bottom of the fitting portion in a lateral direction.
• the supply device of the molten metal according to the present invention may supply the molten metal to a ladle provided in the manufacturing device.
• the apparatus for supplying molten metal according to the present invention may supply molten metal such as aluminum, zinc, and tin.
• a ring member made of metal such as titanium (T i) is attached to the outer peripheral portion of the operation port in a state where the ring member does not come off, and the ring member is radially inward. It is also possible to provide a scraper fitted in the insertion hole in a state of being elastically deformed.
• the molten metal supply device according to the present invention is characterized in that the operated member is operated to move up and down a valve rod as an operation rod.
• the valve body may be configured to move up and down in the valve body moving hole to switch the flow path only by contact with the valve seat formed on the inner surface of the valve body moving hole.
• the piston rod as the operation port may be formed to have a smaller diameter than the outer diameter of the piston as the operated member.
• the present invention relates to a device for supplying molten metal, which is useful for improving the accuracy of hot water supply and improving maintainability.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
• Reciprocating Pumps (AREA)
• Furnace Charging Or Discharging (AREA)
• Details Of Valves (AREA)

Priority Applications (3)

Applications Claiming Priority (6)

Publications (1)

Family

ID=27346886

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Cited By (1)

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• 2002
  • 2002-06-03 WO PCT/JP2002/005451 patent/WO2002100574A1/ja not_active Application Discontinuation
  • 2002-06-03 EP EP02728223A patent/EP1407843A4/en not_active Withdrawn
  • 2002-06-03 CN CNB028155084A patent/CN1277639C/zh not_active Expired - Fee Related
  • 2002-06-03 KR KR10-2003-7015906A patent/KR20030097911A/ko not_active Application Discontinuation
  • 2002-06-06 TW TW091112243A patent/TW528625B/zh not_active IP Right Cessation

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