JP2008254045A - Molten metal molding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molten metal molding apparatus in which, even if an inert gas is continuously fed toward a molten metal port during a molding (casting) operation, the useless consumption of the inert gas can be suppressed as much as possible. <P>SOLUTION: The molten metal molding apparatus is configured in such a manner that a molten metal is fed from the molten metal port provided at an injection sleeve into the injection sleeve shot-by-shot, the molten metal in the injection sleeve is injected-charged inside a mold by an injection plunger, and the inert gas is fed into the injection sleeve through the molten metal port, wherein the period at which the mold is released, the injection plunger is put into a state where it closes the molten metal port. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, molten metal is supplied to the injection sleeve from a hot water supply port provided in the injection sleeve every shot, and the molten metal in the injection sleeve is injected and filled into a mold by an injection plunger. More particularly, the present invention relates to a molten metal forming apparatus in which an inert gas such as Ar (argon) gas is fed into an injection sleeve.

  The molten metal molding equipment that obtains products by injecting and filling molten metal material into the mold cavity is equipped with a melting furnace (crucible) that melts the metal material (eg, Al alloy, Mg alloy, etc.). The metal material melted in the furnace is weighed and pumped by a ladle for each shot, and the pumped molten metal (molten metal) is poured into the injection sleeve and injected into the mold cavity by high-speed advancement of the injection plunger. A cold chamber die casting machine that is filled is well known. In this cold chamber type molten metal forming apparatus (die casting machine), the metal material (molten metal) melted in the melting furnace is pumped up and transported by a ladle, so that the entire apparatus becomes large.

  Therefore, a molten metal forming apparatus in which a metal material is melted by a heating cylinder that also serves as an injection sleeve without using a melting furnace to melt the metal material is disclosed in Japanese Patent Application Laid-Open No. 2004-148391 (Patent Document 1). Reference). In Patent Document 1, a metal material is melted by a heating cylinder that also serves as an injection sleeve, and molten metal (molten metal) is directly injected and filled into a cavity of a mold from a nozzle at the tip of the heating cylinder. Therefore, as compared with a configuration in which a metal material melted in a melting furnace is measured by a ladle for every shot and pumped into an injection sleeve like a cold chamber type die casting machine equipped with a melting furnace. Since no melting furnace is required, the entire apparatus can be relatively compact.

  However, in the molten metal forming apparatus disclosed in Patent Document 1, the nozzle at the tip of the heating cylinder is configured to solidify and melt the metal material for each shot. If the diameter of the nozzle is not reduced to a certain extent, the responsiveness of melting and solidification of the metal material in the nozzle is deteriorated, so the diameter of the land portion of the nozzle must be reduced to a certain extent. However, the following problems occur when the diameter of the land portion of the nozzle is small. That is, in the injection / filling of molten metal, generally, the molten metal passage speed of the mold gate part and runner part is usually 55 m / second or less from the viewpoint of seizure and pressure loss. It is said that 30 to 40 m / sec is preferable. The passing amount of molten metal per unit time is the product of the area of the diameter of the nozzle land and the passing speed, the diameter of the nozzle land is small, and there is a limitation on the passing speed as described above. Therefore, the amount of molten metal passing per unit time, in other words, the filling amount is naturally limited. In forming molten metal, since the molten metal is rapidly cooled and solidified after being filled in the cavity, the filling time is generally as short as about 0.1 to 0.05 seconds. From these facts, the molten metal forming apparatus disclosed in Patent Document 1 naturally has a limited product weight that can be formed (cast) even though the melting ability of the metal is sufficient.

  In this regard, the cold chamber type die casting machine (molten metal forming equipment) is excellent in versatility because it can optimize the injection and filling speed and the size of the passage area of the runner for each product. ing.

  Therefore, there is a molten metal forming apparatus that combines the advantages of a configuration in which a metal material is melted by a heating cylinder without using a melting furnace to melt the metal material, and the advantages of a cold chamber type die casting machine. Japanese Patent Laid-Open No. 2004-167499 (Patent Document 2).

  4 and 5 are diagrams showing a configuration of a molten metal forming apparatus (cold chamber die casting machine) disclosed in Patent Document 2. FIG. 4 and 5, 101 is a heating cylinder, 102 is an end plug provided on the tip side of the heating cylinder 101, 103 is a metal material (in FIGS. 4 and 5, reference numeral 103 is a cylindrical shape before melting) 104 represents a columnar shape, generally representing a metal material, a metal material in a semi-molten state, a metal material in a molten state (metal melt), or a metal material solidified after injection / filling (cast product). The metal material 103 is pushed into the heating cylinder 101 from the rear end opening of the heating cylinder 101, and the molten metal material (metal melt) 103 in the heating cylinder 101 is supplied to the injection sleeve from the front end side of the heating cylinder 102 ( A hydraulic cylinder for pushing in (drop-supply), 105 is a fixed die plate, 106 is a fixed side mold mounted on the fixed die plate 105, 1 7 is a movable mold that moves forward and backward relative to the fixed mold 106, 108 is a cavity formed by both molds 106 and 107 in a clamped state, and 109 has a tip formed on the fixed mold 106. An injection sleeve that is fixed and communicated with the cavity 108, 110 is a hot water supply port provided in the injection sleeve 109, 111 is a metal melt 103 that falls through the runner of the end plug 102, and an injection sleeve. 109 is a hot water supply guide pipe leading to the hot water supply port 110, 112 is a cover for closing the opening between the lower end opening of the hot water supply guide pipe 111 and the hot water supply port 110 from the outside air, and 113 is drilled in the end plug 102. An inert gas injection hole 114 communicated with the inside of the injection sleeve 109 through the inside of the hot water passage portion, the inside of the hot water supply guide pipe 111 and the inside of the cover 112, 114 is an injection Forward-reverse possible injection plunger through the sleeve 109, 115 is a hydraulic cylinder for injection of the forward-reverse drive the injection plunger 114.

In the configuration shown in FIGS. 4 and 5, the cylindrical metal material sequentially supplied from the cylindrical metal material supply device so as to face the rear end opening of the heating cylinder 101 is moved forward by the piston rod of the hydraulic cylinder 104. The metal material 103 is gradually melted from the rear end side to the front end side of the heating cylinder 101 by heating from the heater that is pushed into the heating cylinder 101 and attached to the heating cylinder 101. The metal material (molten metal) 103 melted in the heating cylinder 101 is moved forward from the stop state at the hot water supply start timing by the advance of the piston rod of the hydraulic cylinder 104, and the runner portion of the end plug 102 and the hot water supply guide pipe 111. Then, hot water is supplied (dropped supply) from the hot water supply port 110 into the injection sleeve 109. FIG. 4 shows a state where the molten metal 103 is poured into the injection sleeve 109 by this hot water supply operation (however, the position of the piston rod of the hydraulic cylinder 104 in FIG. 4 is the position where the hot water supply operation is completed). Absent). Immediately after the hot water supply operation is completed, the piston rod of the hydraulic cylinder 115 is driven forward, and the injection plunger 114 is driven forward from this, so that the molten metal 103 is injected and filled in the cavity 108 of the mold. Is done. After injecting and filling the molten metal 103 into the cavity 108, the mold is opened as shown in FIG. 5 after the metal material 103 in the cavity 108 is solidified (through a predetermined cooling period). In the initial stage of mold opening, the injection plunger 114 presses the solidified biscuit portion 103a (FIG. 5) of the metal material 103, and the solidified metal material 103 is peeled off from the fixed side mold 106 by this mold opening and is movable. After being pushed out of the biscuit portion 103a, the injection plunger 114 is retracted to a predetermined retracted position where hot water can be supplied in the next cycle. Then, after the mold opening is completed, the metal material 103 applied to the movable mold 107 is protruded from the movable mold 107 and chucked by, for example, a robot or the like to be out of the machine (molten metal forming apparatus). It comes to be taken out.
JP 2004-148391 A JP 2004-167499 A

  By the way, in the molten metal forming apparatus of the cited document 2 shown in FIG. 4 and FIG. 5, an easily oxidizable metal such as Mg alloy is used as the metal material 103, and in order to prevent the metal material 103 from being oxidized, An inert gas is fed from the injection hole 113 of the active gas into the injection sleeve 109 through the runner of the end plug 102, the hot water supply guide pipe 111, and the cover 112. However, when the fixed mold 106 and the movable mold 107 are separated, the injection plunger 114 is in the retracted position except for the initial stage of mold opening, so that the front end opening of the injection sleeve 109 is outside air. Therefore, when the inert gas is continuously fed during the molding (casting) operation, the inert gas is introduced into the front end of the injection sleeve 109. As shown by an arrow A in FIG. 5, the air flows out from the opening into the outside air. Therefore, for the most part while the mold is released, the inert gas is wasted, increasing the running cost, especially for the Mg alloy that avoids oxidation thoroughly, When argon (Ar) gas, which is a completely inert gas, is used, since the argon gas is heavier than air, the amount that flows out into the outside air is large, and the argon gas is also expensive. There is a problem of pushing up.

  On the other hand, it can be considered that the feeding of the inert gas is interrupted while the mold is released, but in this way, air is released from the inside of the injection sleeve 109 while the mold is released. It cannot be denied that there is a concern that the Mg alloy that wraps around the tip of the heating cylinder 101 through the inside of the cover 112, the inside of the hot water supply guide pipe 111, and the runner of the end plug 102 and thoroughly avoids oxidation is oxidized. . Further, when the inactive gas is resumed after completion of the opening and closing operation, it takes time to purge the air in the sealed space, which becomes an impediment to shortening the molding (casting) cycle.

  The present invention has been made in view of the above points, and the object of the present invention is to waste the inert gas even if the inert gas is continuously fed toward the hot water supply port during the molding (casting) operation. It is to be able to suppress unnecessary consumption as much as possible.

  In order to achieve the above object, the present invention supplies molten metal into the injection sleeve from a hot water supply port provided in the injection sleeve every shot, and the molten metal in the injection sleeve is injected and filled into the mold by an injection plunger. In a molten metal forming apparatus in which an inert gas is fed into the injection sleeve through the hot water supply port, the injection plunger is controlled so as to close the hot water supply port while the mold is released. A controller is provided.

  In the present invention, since the injection plunger closes the hot water inlet of the injection sleeve during the period when the mold is released, it is possible to continuously add argon gas or the like toward the hot water inlet during the molding (casting) operation. Even if the inert gas is sent in, the inert gas is prevented from flowing into the injection sleeve from the hot water inlet, that is, the inert gas passes through the injection sleeve to the outside air while the mold is released. It is possible to suppress discharge, and therefore it is possible to suppress wasteful consumption of inert gas as much as possible.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1-3 is explanatory drawing which simplifies and shows the principal part of the molten metal shaping | molding apparatus which concerns on one Embodiment (henceforth this embodiment) of this invention.

  1 to 3, 1 is a first holding plate fixed on a base member for an appropriate melting system unit (not shown), and 2 is a base member for a melting system unit (not shown). The second holding plate 3, which is fixed and opposed to the first holding plate 1, is fixed at the both ends to the first holding plate 1 and the second holding plate 2, respectively. The plurality of connecting shafts 4 that integrally connect the second holding plate 2 and the second holding plate 2 are arranged so as to be inserted and guided through the connecting shaft 3 so as to be able to move forward and backward. As will be described later, the linear motion body 5 is driven forward and backward with respect to the holding plate 2, 5 is an electric servo motor for pushing a metal material mounted on the second holding plate 2, and 6 is an electric servo motor 5. Control motor driver, 7 is molten metal forming The system controller 7 is responsible for overall control of the apparatus, and the system controller 7 refers to measurement information from various sensors (not shown), timekeeping information, and the like, and based on various programs prepared in advance, each part of the molten metal forming apparatus To control the operation. The system controller 7 directly controls the electric servo motor 5 while referring to the output of an encoder (not shown) attached to the electric servo motor 5 or the output of a load cell 13 (pressure detection sensor) described later. A drive command for speed feedback control is provided via the motor driver 6 so that the moving body 4 is driven by speed feedback control along the position axis or the linear motion body 4 is driven by pressure feedback control along the time axis. Gives a drive command for pressure feedback control.

  8 is a small driving pulley fixed to the output shaft of the electric servomotor 5, 9 is a driven pulley that transmits the rotation of the electric servomotor 5 via the small driving pulley 8 and a timing belt (not shown), The ball screw mechanism 11 includes a screw shaft 11 and a nut body 12 and converts rotational motion into linear motion. The screw shaft 11 is rotatably held by the second holding plate 2 and has a driven pulley 9 fixed to the end thereof. , 12 is a nut body that is screwed to the screw shaft 11 and moves linearly as the screw shaft 11 rotates, and has an end portion fixed to the load cell 13 fixed to the linear motion body 4. The rotation of the electric servo motor 5 is transmitted to the screw shaft 11 through the small driving pulley 8, a timing belt (not shown), and the driven pulley 9, and is integrated with the nut body 12 according to the rotation direction of the screw shaft 11. Thus, the linear motion body 4 and the load cell 13 are driven forward or backward.

  The linear motion body 4 was pushed into the heating cylinder 14 by a cylindrical metal material 29 before melting, which will be described later, from the opening at the rear end of the heating cylinder 14 described later, and was melted by the heating cylinder 14. The metal material (molten metal) 29 is for supplying hot water (falling supply) from the front end side of the heating cylinder 14 to the injection sleeve 23 described later. This linear motion body 4 has an inner peripheral diameter of the heating cylinder 14 described later. Also, a pushing portion 4a having a slightly thinner outer diameter is provided.

  14 is a heating cylinder whose rear end is fixed to the first holding plate 1, and 15 is a first “H” -shaped first hot water pipe integrally provided with the heating cylinder 14 on the front end of the heating cylinder 14. The members 16 and 16 are integrated with the first hot water supply pipe member 15, incorporate a distal end portion of the first hot water supply pipe member 15, and are discharged (extruded) from the heating cylinder 14 via the first hot water supply pipe member 15. This is a second hot water supply pipe member composed of a vertical pipe for dropping and supplying the molten metal 29 into an injection sleeve 23 to be described later. A gas injection part 16 a is provided on the upper part of the second hot water supply pipe member 16. Yes. Although not shown in FIGS. 1 to 3, a band heater is wound around the outer periphery of the heating cylinder 14, the first hot water supply pipe member 15, and the second hot water supply pipe member 16.

  17 is an argon gas supply device that pressurizes argon (Ar) gas, which is a complete inert gas, to a degree slightly higher than atmospheric pressure, and supplies it to the gas injection part 16a via the control valve 18, It is a valve driver that drives and controls the control valve 18 based on a command from the system controller 7. During the molding (casting) operation, the system controller 7 keeps the control valve 18 open at all times, and sends argon gas from the gas injection unit 16 a to the second hot water supply pipe member 16 through the control valve 18 from the argon gas supply device 17. In this way, argon gas is also fed into an injection sleeve 23 described later.

  Reference numeral 20 denotes a fixed mold, and 21 is a movable mold, which is omitted in the drawing, but the fixed mold 20 is mounted on a fixed die plate, and the movable mold 21 is a movable die plate that can be moved forward and backward. The movable mold 21 is clamped (closed / clamped) or opened by moving the movable die plate back and forth. When the mold clamping is completed, the fixed mold 20 is fixed. The cavity 22 is formed by the movable mold 21.

  23 is an injection sleeve whose end is fixed to the stationary mold 20, and 24 is drilled in the upper part of the outer periphery of the injection sleeve 23 so as to face the tip opening (lower opening) of the second hot water supply pipe member 16. The tip of the second hot water supply pipe member 16 comes into contact with the outer periphery of the injection sleeve 23 around the hot water supply port 24 at the hot water supply port (metal molten metal injection port). Are in communication with no gaps.

  25 is a hydraulic cylinder for injecting and filling the molten metal 29, and 26 is an injection plunger capable of moving back and forth in the injection sleeve 23. Here, for convenience of illustration, the injection plunger 26 is a hydraulic cylinder. The rod portion of the injection plunger 26 is actually connected to and fixed to the tip of the piston rod of the hydraulic cylinder 25. The hydraulic cylinder 25 is controlled by the system controller 7 via the valve driver 27 and the hydraulic cylinder control valve 28 to move the injection plunger 26 forward or backward.

  1 to 3, reference numeral 29 designates a cylindrical metal material before melting, a metal material in a semi-molten state, a metal material in a molten state (metal melt), or a metal solidified after injection / filling. The material (cast product) is shown comprehensively.

  Next, the shaping | molding driving | operation operation | movement of the molten metal shaping | molding apparatus of this embodiment is demonstrated using FIGS. During the molding (casting) operation, as described above, the argon gas from the argon gas supply device 17 is continuously fed into the second hot water supply pipe member 16 through the gas injection part 16a.

  FIG. 1 shows the state of the start timing of the hot water supply process. At this time, both molds 20, 21 are in a clamped state, and the cavity 22 is formed by both molds 20, 21, and the linear motion body A part of the push-in portion 4 a of 4 is stopped in a state of entering the heating cylinder 14. Further, the injection plunger 26 is placed in a position for closing the hot water supply port 24 as shown in FIG. 3 until the mold clamping process is completed. When the mold clamping process is completed, the injection plunger 26 is immediately moved to the retracted position as shown in FIG. When driven, at the start timing of the hot water supply process, the injection plunger 26 is placed in a predetermined retracted position so that the molten metal 29 can be supplied into the injection sleeve 23 and the second hot water supply pipe member 16 is provided. In this state, the argon gas fed into the injection sleeve 23 is caused to flow into the injection sleeve 23 from the hot water supply port 24.

  Upon confirming the completion of the mold clamping process, the system controller 7 immediately drives and controls the hydraulic cylinder 25 via the valve driver 27 and the hydraulic cylinder control valve 28 to move the injection plunger 26 to the retracted position as shown in FIG. The system controller 7 recognizes that it has reached the start timing of the hot water supply process, and immediately starts the hot water supply process. In this hot water supply process, the system controller 7 drives the electric servo motor 5 to rotate in a predetermined direction at a high speed via the motor driver 6, whereby the linear motion body 4 is driven forward at a high speed via the ball screw mechanism 10. The pushing portion 4a of the linear motion body 4 advances in the heating cylinder 14 by a predetermined stroke. As a result, a predetermined amount of the molten metal 29 is dropped and supplied (hot water is supplied) from the hot water supply port 24 into the injection sleeve 23 through the first hot water supply pipe member 15 and the second hot water supply pipe member 16.

  Upon confirming that the predetermined amount of molten metal 29 has been supplied, the system controller 7 immediately starts the injection / filling process. That is, the system controller 7 drives and controls the hydraulic cylinder 25 via the valve driver 27 and the hydraulic cylinder control valve 28, and drives the injection plunger 26 forward according to a predetermined condition. After degassing, injection and filling of the molten metal 29 into the cavity 22 by high-speed advancement of the injection plunger 26 is performed, and then, a predetermined pressure increase is output by the hydraulic cylinder 25 and the inside of the cavity 22 is output. A pressure increase is applied to the metal material (the injection system unit in FIG. 2 shows a state of completion of injection / filling or a state during pressure increase).

  When it is confirmed that the injection / filling / pressure increasing process is completed and a predetermined cooling period has elapsed (the metal material 29 in the cavity 22 is solidified), the system controller 7 starts the mold opening process. In this mold opening process, the system controller 7 drives and controls a mold opening / closing drive source (not shown) to move the movable die plate on which the movable mold 21 is mounted in the mold opening direction, and at the beginning of the mold opening operation. The hydraulic cylinder 25 is driven and controlled via the valve driver 27 and the hydraulic cylinder control valve 28 to slightly advance the injection plunger 26, whereby the biscuit portion 29 a ( 2 and 3) are pushed out of the injection sleeve 23. By such mold opening and biscuit extrusion operation, as shown in FIG. 3, the solidified metal material 29 is peeled off from the fixed mold 20 side and is attached only to the movable mold 21. Become. When it is confirmed that the pushing out of the biscuit portion 29a is completed, the system controller 7 drives and controls the hydraulic cylinder 25 via the valve driver 27 and the hydraulic cylinder control valve 28, and moves the injection plunger 26 backward by a predetermined amount to perform injection. The state shown in FIG. 3 is maintained until the mold clamping process of the next cycle is completed, and the state shown in FIG. 3 is maintained until the end of the plunger 26 closes the hot water supply port 26.

  When it is confirmed that the mold opening process has been completed, the system controller 7 drives and controls a drive source for casting casting not shown and a robot for picking up casting casting (not shown) to solidify the movable mold 21. The extruded metal material (cast product) 29 is ejected in synchronism with the chucking of the projected cast product 29 by the robot, and the cast product 29 chucked by the robot is machined (molten metal forming apparatus) by the robot. Carry it outside.

  Then, when the start timing of mold clamping (mold closing / clamping) in the next molding (casting) cycle is reached, the system controller 7 drives and controls a mold opening / closing drive source (not shown), so that the movable side mold 21 is driven. Is moved in the mold closing direction, the molds 20 and 21 are touched by mold closing, and then a mold clamping operation for applying a predetermined mold clamping force to both the molds 20 and 21 is executed. It is like that.

  When the above-described hot water supply process is completed, if the metal material 29 for hot water supply for the next shot remains in the heating cylinder 14, the linear motion body 4 (the pushing portion 4a) is positioned at the current position. Is retained. On the other hand, when it is necessary to supply a new cylindrical metal material 29 into the heating cylinder 14 when the hot water supply process is completed, the system controller 7 moves the electric servo motor 5 through the motor driver 6 in a predetermined direction. So that the linear motion body 4 is retracted, and the pushing-in part 4a of the linear motion body 4 comes out of the heating cylinder 14 slightly beyond the length of the new cylindrical metal material 29. Then, the linear motion body 4 (the pushing portion 4a) is caused to take a predetermined retracted position. Next, a predetermined length of cylindrical metal material 29 preheated from a preheating device (not shown) is taken out by a material supply robot (not shown) in response to a command from the system controller 7, and this material supply robot. The cylindrical metal material 29 gripped by is positioned so as to face the opening at the rear end of the heating cylinder 14. Subsequently, in response to a command from the system controller 7, a material supply robot (not shown) loosens the gripping force of the cylindrical metal material 29 and is allowed to push in the metal material 29 (at this time, the metal material 29 It goes without saying that the positioning accuracy is maintained), and the system controller 7 rotates the electric servo motor 5 in a predetermined direction via the motor driver 6 to advance the linear motion body 4 and push the linear motion body 4 into the pushing portion. The cylindrical metal material 29 is pushed into the heating cylinder 14 from the opening at the rear end of the heating cylinder 14 by 4a. When the system controller 7 advances the linear motion body 4 by a predetermined amount, the system controller 7 stops the linear motion body 4 and waits for the next hot water supply process in this state.

  As described above, in the present embodiment, while the molds 20 and 21 are released, the injection plunger 26 closes the hot water supply port 24 of the injection sleeve 23, so that the molding (casting) operation is in progress. Even if the argon gas is sent to the hot water supply port 24 continuously, the argon gas is prevented from flowing into the injection sleeve 23 from the hot water supply port 24, that is, the molds 20 and 21 are released. During the operation, the argon gas can be prevented from being discharged to the outside air through the injection sleeve 23. Therefore, wasteful consumption of the argon gas can be restrained as much as possible, and the running cost is greatly reduced. Can be made.

It is explanatory drawing which simplifies and shows the principal part mechanism of the start timing of a hot-water supply process, and a principal part control system in the molten metal shaping | molding apparatus which concerns on one Embodiment of this invention. It is explanatory drawing which simplifies and shows the principal part mechanism in the completion state of injection | pouring and filling thru | or the pressure increase, and the principal part control system in the molten metal shaping | molding apparatus which concerns on one Embodiment of this invention. It is explanatory drawing which simplifies and shows the principal part mechanism of a mold opening completion state, and the principal part control system in the molten metal shaping | molding apparatus which concerns on one Embodiment of this invention. It is explanatory drawing which shows the principal part structure of the molten metal shaping | molding apparatus by a prior art. It is explanatory drawing which shows the principal part structure of the molten metal shaping | molding apparatus by a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st holding plate 2 2nd holding plate 3 Connecting shaft 4 Direct-acting body 4a Pushing part 5 Electric servo motor 6 Motor driver 7 System controller 8 Drive small pulley 9 Driven pulley 10 Ball screw mechanism 11 Screw shaft 12 Nut body 13 Load cell 14 Heating cylinder 15 First hot water supply pipe member 16 Second hot water supply pipe member 16a Gas injection part 17 Argon gas supply device 18 Control valve 19 Valve driver 20 Fixed side mold 21 Movable side mold 22 Cavity 23 Injection sleeve 24 Hot water supply port 25 Hydraulic cylinder 26 Injection Plunger 27 Valve Driver 28 Hydraulic Cylinder Control Valve 29 Metal Material

Claims (4)

The molten metal is supplied into the injection sleeve from a hot water supply port provided in the injection sleeve every shot, and the molten metal in the injection sleeve is injected and filled into the mold by an injection plunger, A molten metal forming apparatus configured to send an inert gas through a hot water outlet,
A molten metal forming apparatus comprising: a controller that controls the injection plunger to take a state of closing the hot water supply port during a period in which the mold is released. The molten metal forming apparatus according to claim 1,
The molten metal forming apparatus, wherein the inert gas is argon gas. The molten metal forming apparatus according to claim 1,
A molten metal forming apparatus, wherein the inert gas is fed into the injection sleeve through a hot water supply pipe member that supplies the molten metal from the hot water supply port into the injection sleeve. The molten metal forming apparatus according to claim 3,
The molten metal forming apparatus, wherein the inert gas is continuously fed into the hot water supply pipe member during the forming operation.

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