JP6861119B2 - Die-casting machine and die-casting method - Google Patents

Description

The present invention relates to a die-cast molding machine and a die-cast molding method, and more particularly to a die-cast molding machine and a die-cast molding method for injecting a semi-solid metal to mold a molded product.

Conventionally, a die casting machine that injects a semi-solidified slurry alloy (semi-solidified metal) to form a molded product is known (see, for example, Patent Document 1).

In Patent Document 1, a mold including a fixed mold and a movable mold, a sleeve attached to the fixed mold, and a semi-solidified slurry alloy charged into the sleeve are injected into the mold. A die casting machine equipped with a plunger is disclosed. The semi-solidified slurry-like alloy is taken out of the mold from the semi-solidified slurry forming cup (container) and then directly held by the robot chuck to be used between the fixed mold and the moving mold in the mold open state. From between, it is thrown into the sleeve. The plunger ejects the semi-molten metal charged in the sleeve into the mold after molding.

Japanese Unexamined Patent Publication No. 2006-239708

However, in the die casting machine disclosed in Patent Document 1, when the semi-solidified slurry alloy (semi-solidified metal) is put into the sleeve, the semi-solidified slurry alloy is directly held by the robot chuck, so that the semi-solidified slurry alloy is semi-solidified. There is a problem that the shape of the slurry-like alloy is deformed and the heat of the semi-solidified slurry-like alloy is taken away by the robot chuck. If the shape of the semi-solidified slurry-like alloy is deformed, air is likely to be involved in the semi-solidified slurry-like alloy at the time of injection, which is not preferable. Further, if the heat of the semi-solidified slurry-like alloy is taken away by the robot chuck, the fluidity of the semi-solidified slurry-like alloy is lowered and filling defects are likely to occur, which is not preferable.

The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to make an injection sleeve while suppressing the shape of the semi-solidified metal charged into the injection sleeve from collapsing. It is an object of the present invention to provide a die casting machine and a die casting method capable of suppressing heat from being taken away from the semi-solidified metal to be charged.

In order to achieve the above object, the die casting machine according to the first invention uses a mold including a fixed mold and a mobile mold, a tubular injection sleeve attached to the fixed mold, and a movable mold with respect to the fixed mold. The semi-solid metal in the cylindrical container arranged between the fixed mold and the moving mold in the mold open state is pushed out into the injection sleeve and put into the mold clamping mechanism that moves the mold to tighten the mold. It is provided with an extrusion mechanism for injecting a semi-solidified metal charged into an injection sleeve by an extrusion mechanism into a mold in a molded state.

As described above, this die casting machine is provided with an extrusion mechanism that pushes out the semi-solidified metal in the tubular container arranged between the fixed mold and the mobile mold into the injection sleeve in the mold open state. .. As a result, the semi-solid metal in the container arranged between the fixed mold and the mobile mold can be extruded by the extrusion mechanism and directly put into the injection sleeve. As a result, it is not necessary to directly hold the semi-solid metal by a robot chuck or the like as in the conventional case, so that it is possible to prevent the shape of the semi-solid metal charged into the injection sleeve from being deformed. Further, since the semi-solidified metal is arranged between the fixed mold and the mobile mold while maintaining the state of being contained in the container, it is extruded by the extrusion mechanism and directly put into the injection sleeve, so that the semi-solidified metal is once stored in the container. It is possible to suppress the deprivation of heat from the semi-solid metal charged into the injection sleeve as compared with the case where the metal is taken out from the body and gripped by the robot chuck.

In the above-mentioned die casting machine, preferably, the extrusion mechanism is provided in the movable mold and is arranged at a position overlapping with the injection sleeve when viewed from the moving direction of the mobile mold. With this configuration, the injection sleeve is provided in the fixed mold and the extrusion mechanism is provided in the movable mold, so that the container is arranged between the injection sleeve and the extrusion mechanism. The semi-solidified metal in the container can be easily extruded toward. Further, since the extrusion mechanism is arranged at a position where it overlaps with the injection sleeve when viewed from the moving direction of the mobile type, the semi-solid metal can be pushed straight from the extrusion mechanism toward the injection sleeve. As a result, it is possible to prevent the shape of the semi-solidified metal charged into the injection sleeve from collapsing.

In this case, preferably, the extrusion mechanism provided in the mobile mold is configured to extrude the semi-solidified metal in the container by being moved to the fixed mold side together with the mobile mold by the mold clamping mechanism. With this configuration, the semi-solidified metal can be pushed out of the container by utilizing the mold clamping operation of the die casting machine, so that the semi-solidified metal can be pushed by a large external force. As a result, the semi-solidified metal in close contact with the container can be easily peeled off.

In the above-mentioned die casting machine, preferably, the extrusion mechanism includes a pressing portion that comes into contact with the semi-solidifying metal in the container and pushes out the semi-solidifying metal, and a main body portion that moves the pressing portion in the moving direction of the movable type. With this configuration, when the semi-solidified metal is put into the injection sleeve, the portion that is in direct contact with the semi-solidified metal and the portion that is not in direct contact with the semi-solidified metal can be separated. Therefore, when the semi-solidified metal is put into the injection sleeve, it is possible to prevent the main body from being directly exposed to the high-temperature semi-solidified metal.

In this case, preferably, the movable type is provided with a space portion in which the main body portion is arranged and a through hole for communicating the end portion on the fixed mold side of the movable type and the space portion, and the pressing portion is provided. , It is passed through the through hole so as to close the through hole. With this configuration, the through hole is closed by the pressing portion, so that it is possible to prevent the semi-solidified metal from reaching the space portion through the through hole at the time of injection. This makes it possible to prevent the main body from being directly exposed to the high temperature semi-solid metal at the time of injection.

In a configuration in which the extrusion mechanism includes a pressing portion and a main body portion, preferably, the extrusion mechanism is moved to the fixed mold side together with the moving mold by the mold clamping mechanism to press the semi-solidified metal in the container. After peeling the semi-solidified metal from the container, the semi-solidified metal is extruded by the main body to put the semi-solidified metal into the injection sleeve. Here, in general, the semi-solidified metal is firmly adhered to the container. Therefore, in order to remove the semi-solidified metal from the container, it is necessary to first peel the semi-solidified metal from the container, and a relatively large external force (pressing pressure) is required. Therefore, if it is configured as described above, it is an extrusion mechanism that can easily peel off the semi-solidified metal from the container by utilizing the mold clamping operation of the die casting machine and cannot mechanically exert a large external force. Even so, the semi-solidified metal can be reliably extruded from the container and put into the injection sleeve.

In the above die casting machine, preferably, the extrusion mechanism includes an air cylinder. With such a configuration, the air cylinder can exhibit stable performance in a high temperature environment as compared with an electric or hydraulic extrusion mechanism.

In the above die casting machine, preferably, the extrusion mechanism is configured to extrude the semi-solidified metal in the vicinity of the split surface of the fixed mold in the injection sleeve. With this configuration, the semi-solid metal can be arranged at a position close to the cavity, so that the semi-solid metal can be introduced into the cavity by extruding a relatively short distance when ejecting by the plunger. As a result, galling (seizure) of the plunger can be suppressed, and air entrainment when the semi-solidified metal is moved in the sleeve can be suppressed.

In the above die casting machine, preferably, a fixed die plate to which a fixed mold is attached is further provided, and the tip portion of the plunger on the movable mold side is arranged inside the fixed die plate when starting the movement for injection. Has been done. With this configuration, the moving distance of the plunger for injection can be shortened as compared with the case where the plunger is arranged on the outside of the fixed die plate (the side separated from the mold). As a result, the injection time can be shortened, so that the molding cycle can be shortened.

In the above die casting machine, preferably, the extrusion mechanism is arranged in one opening of the container and is configured to extrude the semi-solid metal including the bottom in the container by pressing the solidified bottom of the semi-solid metal. The mobile mold is provided with a recess for storing the bottom ejected by the plunger at a position different from the runner of the mold and at a position overlapping the injection sleeve when viewed from the moving direction of the mobile mold. There is. With this configuration, when the semi-solidified metal is extruded into the mold by the plunger, the recess is provided at a position different from the runner and overlaps with the injection sleeve when viewed from the moving direction of the mobile mold. The bottom of the semi-solidified metal can be stored. As a result, since the bottom can be placed in the recess deviated from the runner, it is possible to prevent the bottom from blocking the runner and preventing the bottom from obstructing the flow of semi-solidified metal through the runner.

The die casting method according to the second invention includes a step of arranging a container between a fixed mold and a mobile mold by using a transport device that holds a tubular container containing a semi-solid metal, and a mobile mold. The process of extruding the semi-solid metal in the container arranged between the fixed mold and the mobile mold into the injection sleeve using the provided extrusion mechanism, and the mobile mold and the process of extruding by the extrusion mechanism into the injection sleeve. It includes a step of molding a fixed mold into which a semi-solidified metal is charged, and a step of injecting the semi-solidified metal extruded into an injection sleeve into a molded mold using a plunger.

In this die casting method, as described above, the semi-solidified metal in the tubular container arranged between the fixed mold and the mobile mold is extruded into the injection sleeve by using the extrusion mechanism provided in the mobile mold. .. As a result, the semi-solid metal in the container arranged between the fixed mold and the mobile mold can be extruded by the extrusion mechanism and directly put into the injection sleeve. As a result, it is not necessary to directly hold the semi-solidified metal by a robot chuck or the like as in the conventional case, so that a die casting method capable of suppressing the shape of the semi-solidified metal charged into the injection sleeve from being deformed can be obtained. Can be done. Further, since the semi-solid metal is placed between the fixed mold and the mobile mold while maintaining the state of being contained in the container, it is extruded by the extrusion mechanism and directly put into the injection sleeve, so that the semi-solid metal is once stored in the container. It is possible to obtain a die casting method capable of suppressing the removal of heat from the semi-solidified metal charged into the injection sleeve, as compared with the case where the metal is taken out of the injection sleeve and gripped by the robot chuck.

According to the present invention, as described above, it is possible to suppress the shape of the semi-solidified metal charged into the injection sleeve from being deformed and to suppress heat from being taken away from the semi-solidified metal charged into the injection sleeve. it can.

It is a schematic diagram which showed the whole structure of the die casting molding machine by one Embodiment. It is a figure for demonstrating the container which holds a semi-solidified metal. It is a figure for demonstrating the 1st process of the 1st molding method by one Embodiment. It is a figure for demonstrating the 2nd process of the 1st molding method by one Embodiment. It is a figure for demonstrating the 3rd process of the 1st molding method by one Embodiment. It is a figure for demonstrating the 4th process of the 1st molding method by one Embodiment. It is a figure for demonstrating the 5th step of the 1st molding method by one Embodiment. It is a figure for demonstrating the 6th process of the 1st molding method by one Embodiment. It is a figure for demonstrating the 1st process of the 2nd molding method by one Embodiment. It is a figure for demonstrating the 2nd process of the 2nd molding method by one Embodiment. It is a figure for demonstrating the 3rd process of the 2nd molding method by one Embodiment. It is a figure for demonstrating the 1st process of the 3rd molding method by one Embodiment. It is a figure for demonstrating the 2nd process of the 3rd molding method by one Embodiment. It is a figure for demonstrating the 3rd process of the 3rd molding method by 1 Embodiment.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

[Embodiment]
The configuration of the die casting machine 100 according to one embodiment will be described with reference to FIGS. 1 to 14.

(Structure of die casting machine)
As shown in FIG. 1, the die casting machine 100 includes a fixed die plate 101, a moving die plate 102, a moving die plate driving mechanism 103, a die casting injection device 104, a fixed die 1a, and a moving die 1b. It is equipped with a mold 105. The die-cast molding machine 100 is a device for injecting a semi-solidified metal M into a mold 105 in a mold-clamped state by an injection device 104 for die-cast molding to form a molded product M0 (see FIG. 8). Further, the moving die plate drive mechanism 103 is an example of a "molding mechanism" within the scope of claims.

In each figure, the moving direction of the moving type 1b is the X direction. Further, of the X directions, the direction from the fixed die plate 101 toward the moving die plate 102 is pushed in the X1 direction, and the opposite direction is set to the X2 direction. Further, the vertical direction is the Z direction.

The fixed mold 1a is attached to and fixed to the fixed die plate 101. The movable type 1b is attached to and fixed to the moving die plate 102 provided on the X1 direction side of the fixed die plate 101. The fixed die plate 101 is fixed, and the moving die plate 102 is configured to be movable in the X2 direction or the X1 direction by the moving die plate driving mechanism 103. Further, the die casting machine 100 is provided with a plurality of tie bars 106 for guiding the movement of the moving die plate 102. The tie bar 106 has a rod shape extending in the X direction and is inserted through the moving die plate 102. The moving die 1b is configured to approach or move away from the fixed die 1a as the moving die plate 102 moves along the tie bar 106 in the X direction.

By bringing the moving mold 1b closer to the fixed mold 1a by the moving die plate drive mechanism 103 and molding the mold, the cavity (cavity portion) 1c for molding the die casting product (molded product) is contained in the mold 105. (See FIG. 7) is formed. The fixed mold 1a is provided with a runner 1d (see FIG. 8) which is connected to the cavity 1c and serves as a circulation passage for the semi-solidified metal M. The runner 1d is provided along the mating surface (divided surface) of the fixed type 1a with the moving type 1b. Further, the runner 1d communicates with the injection sleeve 23, which will be described later. The semi-solidified metal M is a metal in a phase state in which a solid phase and a liquid phase are mixed.

The die-cast molding injection device 104 is a device for injecting the semi-solidified metal M into the mold 105 in a molded state fixed to the die-cast molding machine 100. The die casting injection device 104 includes a plunger 21, a drive unit 22, and an injection sleeve 23.

The injection sleeve 23 is attached to the fixed mold 1a and has a cylindrical shape. The outer peripheral surface of the tip end portion (plunger tip) 21a of the plunger 21 is fitted to the inner peripheral surface of the injection sleeve 23. Further, the end portion of the plunger 21 in the X2 direction is connected to the drive unit 22. Further, the plunger 21 is configured to inject the semi-solidified metal M charged into the injection sleeve 23 into the mold 105. The drive unit 22 is configured to move the plunger 21 forward and backward in the X direction in the injection sleeve 23. The drive unit 22 is, for example, a hydraulic cylinder driven by a hydraulic circuit 22a. The air cylinder 3 is an example of the "extrusion mechanism" in the claims.

The tip portion 21a of the plunger 21 on the movable 1b side (X1 direction side) is arranged inside the fixed die plate 101 when starting the movement for injection. That is, in the X direction, the tip portion 21a is arranged at least on the X1 direction side of the end surface of the fixed die plate 101 in the X2 direction. The injection sleeve 23 communicates with the cavity 1c formed in the mold 105 via the runner 1d.

Here, an example of the process of the die casting molding method by the die casting injection apparatus 104 will be briefly described with reference to FIG.

First, the transfer robot T arranges the container C in which the semi-solidified metal M is stored at a predetermined position between the fixed mold 1a and the mobile mold 1b in the mold-opened state while being held by the transport robot T. To. Next, the semi-solidified metal M is pushed out from the container C by an air cylinder 3 provided in the mobile type 1b, which will be described later, and the semi-solidified metal M is charged into the injection sleeve 23. The transfer robot T is an example of a "transfer device" within the scope of the claims.

Next, the transport robot T that grips the empty container C retracts. Next, the mold 105 is molded by the moving die plate drive mechanism 103. Finally, as the plunger 21 advances (moves in the X1 direction) toward the fixed mold 1a (runner 1d), the semi-solidified metal M is ejected into the cavity 1c via the runner 1d. The details of the die casting method will be described later.

As shown in FIG. 2, the container C has a cylindrical shape with both ends open, and has a tapered shape (reverse taper shape) in which the inner diameter and outer diameter expand from one opening C1 to the other opening C2. That is, the inner diameter d1 of one opening C1 is smaller than the inner diameter d2 of the other opening C2 (d2> d1). Further, on the outer surface of the container C near the other opening C2, a non-tapered portion C3 whose outer diameter does not change within a predetermined range in the direction in which the one opening C1 and the other opening C2 are lined up is provided. There is. The non-tapered shape portion C3 is a portion gripped by the transfer robot T.

The transport robot T includes a grip portion T1 that grips the container C, and a robot arm portion T2 that is provided with a grip portion T1 at the tip. The transport robot T holds the container C gripped by the grip portion T1 between the fixed type 1a and the mobile type 1b by the robot arm portion T2, and in the X direction, the other opening on the large diameter side of the container C. C2 is configured to be arranged at a position facing the end of the injection sleeve 23 in the X1 direction. The positioning of the container C in the X direction is performed by abutting (contacting) the other opening C2 on the large diameter side of the container C with the flat divided surface 10a of the fixed mold 1a. At this time, the transfer robot T arranges the container C so that the central axis of the container C substantially coincides with the central axis α of the injection sleeve 23. Further, the transfer robot T is configured to retract the empty container C from between the fixed type 1a and the mobile type 1b.

Here, with reference to FIG. 2, the production of the semi-solidified metal M contained in the container C (preparation before die casting) will be briefly described.

First, an empty container C is installed on the cooling installation table S so that one opening C1 of the container C comes into contact with the cooling installation table S. The cooling installation table S has a refrigerant passage S1 inside which a refrigerant such as water is circulated. Next, the semi-solidified metal M produced in advance is poured into the empty container C by a radle (not shown) or the like.

Next, the cooling installation table S solidifies a part of the semi-solidified metal M stored in the vicinity of the cooling installation table S of the container C to form a solid bottom (solidified metal) M1. At this time, the inside of the container C may be agitated using an electromagnetic agitator (not shown) or the like so that the semi-solidified metal M other than the bottom M1 does not solidify. In the description of the present embodiment, for convenience, the semi-solidified metal portion M2 housed in the container C and the bottom M1 which is the solid metal portion (solidified portion) housed in the container C are combined. It is referred to as semi-solidified metal M.

(Detailed configuration of mold)
Next, a detailed configuration of the mold 105 will be described with reference to FIG.

The mobile type 1b is provided with an air cylinder 3.

The air cylinder 3 pushes out the semi-solidified metal M in the tubular container C arranged at a predetermined position between the fixed mold 1a and the mobile mold 1b into the injection sleeve 23 in the mold open state. It is configured. The air cylinder 3 is provided in the movable mold 1b, and is arranged at a position overlapping the injection sleeve 23 when viewed from the moving direction (X direction) of the mobile mold 1b.

The air cylinder 3 has a pressing portion 31 that comes into contact with the bottom portion M1 in the container C and pushes out the semi-solidified metal M, and a main body portion (air cylinder main body portion) that moves the pressing portion 31 in the moving direction (X direction) of the movable type 1b. ) 32 and are included. Further, in the movable type 1b, a through hole that communicates the space portion 33 in which the main body portion 32 is arranged inside, the end portion (flat surface 35a described later) on the fixed mold 1a side of the movable type 1b, and the space portion 33. 34 is provided.

The space portion 33 is a portion formed so as to be recessed in the X2 direction from the end face of the movable type 1b in the X1 direction. Further, the space portion 33 is arranged at a position overlapping the injection sleeve 23 when viewed from the moving direction (X direction) of the moving type 1b. Further, the space portion 33 has a space large enough to accommodate the main body portion 32. The through hole 34 extends in the X2 direction from the end of the space 33 in the X2 direction and penetrates the movable type 1b. The through hole 34 has a circular vertical cross section orthogonal to the X direction.

The movable mold 1b is provided with a recess 35 at a position different from that of the runner 1d of the mold 105 and at a position overlapping the injection sleeve 23 when viewed from the moving direction (X direction) of the mobile mold 1b. The recess 35 is arranged on the central axis of the injection sleeve 23. Further, the recess 35 has a flat surface 35a orthogonal to the X direction and to which the end portion of the through hole 34 in the X2 direction is connected, and an inclined surface 35b extending in the X2 direction from the peripheral edge portion of the flat surface 35a. That is, a through hole 34 is opened in the flat surface 35a which is the bottom surface of the recess 35. The inclined surface 35b has a tapered shape that expands from the flat surface 35a toward the X2 direction. The recess 35 is configured to store the bottom portion M1 ejected by the plunger 21 in a predetermined area surrounded by the flat surface 35a and the inclined surface 35b.

The pressing portion 31 is a round bar-shaped member having a diameter d3 (see FIG. 3) extending in the X direction. The diameter d3 is smaller than the inner diameter d1 (see FIG. 2) of one opening C1 of the container C (d1> d3). Further, the X1 direction end portion of the pressing portion 31 is connected to the main body portion 32, and the X2 direction end portion is a free end. Further, the central axis of the pressing portion 31 substantially coincides with the central axis α of the injection sleeve 23. Further, the outer peripheral surface of the pressing portion 31 is fitted to the inner peripheral surface of the through hole 34. Further, the pressing portion 31 is fitted in the through hole 34 so as to slide with respect to the movable mold 1b and move forward and backward in the X direction.

The pressing portion 31 and the through hole 34 are fitted with such an accuracy that the semi-solidified metal M does not enter between the outer peripheral surface of the pressing portion 31 and the inner peripheral surface of the through hole 34. That is, the pressing portion 31 is passed through the through hole 34 so as to close the through hole 34. In short, the pressing portion 31 and the through hole 34 have the same configuration as the protrusion pin (not shown) and the protrusion pin arrangement hole (not shown) used when taking out the molded product.

The pressing portion 31 is moved in the horizontal direction (X direction) between the forward limit position F with respect to the movable mold 1b and the backward limit position B with respect to the movable mold 1b by the main body portion 32.

The retreat limit position B is a position where the pressing portion 31 is most moved in the X1 direction with respect to the moving mold 1b, and a position where the end portion of the pressing portion 31 in the X2 direction is substantially flush with the flat surface 35a of the recess 35. (Positions arranged on substantially the same plane). The forward limit position F is a position where the pressing portion 31 is most moved in the X2 direction with respect to the moving mold 1b and protrudes most from the moving mold 1b. At this time, the amount of protrusion of the pressing portion 31 from the movable mold 1b in the X2 direction at the forward limit position F is at least the length of the container C (distance D between one opening C1 and the other opening C2) ( (See Fig. 2).

The pressing portion 31 (air cylinder 3) has a bottom portion M1 arranged in one opening C1 (see FIG. 2) of the container C arranged between the moving mold 1b and the fixed mold 1a in the X1 direction in the mold open state. It is configured to press in the X2 direction from the side. As a result, the pressing portion 31 (air cylinder 3) is configured to push out the semi-solidified metal M including the bottom portion M1 in the container C (empty the container C). As a result, the semi-solidified metal M is charged into the injection sleeve 23.

The pressing portion 31 (air cylinder 3) is configured to push out and insert the semi-solidified metal M in the vicinity of the divided surface 10a of the fixed mold 1a in the injection sleeve 23. That is, the pressing portion 31 (air cylinder 3) is configured to push out the semi-solidified metal M to the forward limit position F (a position beyond the range in which the container C is arranged in the X direction).

(Process of die casting molding method)
Next, the steps of the die casting method by the die casting machine 100 will be described with reference to FIGS. 3 to 14. There are three die casting methods: a first molding method, a second molding method, and a third molding method. Hereinafter, the first to third molding methods will be described in order.

<First molding method>
With reference to FIGS. 3 to 8, the steps of the first molding method will be described by dividing them into six steps of the first to sixth steps. The six steps are performed in the order of the first step, the second step, the third step, the fourth step, the fifth step, and the sixth step.

[First step]
The first step shown in FIG. 3 is a step of arranging the container C containing the semi-solidified metal M at a predetermined position between the fixed mold 1a and the mobile mold 1b in the mold open state. Specifically, in the first step, the container C containing the semi-solidified metal M is gripped by the gripping portion T1 of the transporting robot T, and the central axis of the injection sleeve 23 is gripped by the robot arm portion T2 of the transporting robot T. It is placed on α. At this time, one opening C1 (see FIG. 2) on the small diameter side of the container C is arranged on the X2 direction side of the pressing portion 31 in a state of being separated from the pressing portion 31. Further, the other opening C2 (see FIG. 2) on the large diameter side of the container C is arranged in contact with the fixed mold 1a. On the other hand, the opening C2 is arranged on the X1 direction side of the injection sleeve 23 so as to face the injection sleeve 23.

[Second step]
The second step shown in FIG. 4 is a step of pushing the semi-solidified metal M out of the container C by the air cylinder 3 and charging the semi-solidified metal M into the injection sleeve 23. Specifically, in the second step, the semi-solidified metal M is extruded from the container C by the pressing portion 31 advancing in the X2 direction, entering the container C and moving to the advancing limit position F. The semi-solidified metal M extruded by the pressing portion 31 is charged onto the injection sleeve 23. At this time, the bottom portion M1 (solidified metal) is arranged at the end portion (front in the injection direction) of the semi-solidified metal M in the X1 direction. Since the semi-solidified metal M is in close contact with the container C, the air cylinder 3 uses a relatively large force to move the semi-solidified metal M to the container C when the pressing portion 31 first moves the semi-solidified metal M. Need to be peeled off from. Therefore, the main body portion 32 (air cylinder 3) exerts a necessary force to press the bottom portion M1 via the pressing portion 31.

[Third step]
In the third step shown in FIG. 5, the pressing portion 31 arranged in the empty container C is pulled out from the container C. Then, the pressing portion 31 is moved to the retreat limit position B, and the end portion of the pressing portion 31 in the X2 direction and the flat surface 35a of the recess 35 become substantially flush with each other (arranged on substantially the same plane).

[4th step]
In the fourth step shown in FIG. 6, the empty container C gripped by the grip portion T1 of the transport robot T is retracted from between the fixed mold 1a and the mobile mold 1b by the robot arm portion T2 of the transport robot T. To.

[Fifth step]
In the fifth step shown in FIG. 7, the moving die plate drive mechanism 103 moves the moving die 1b fixed to the fixed die plate 101 and the moving die plate 102 in the X2 direction to perform mold clamping. As a result, the cavity 1c corresponding to the product shape is formed in the mold 105.

[Sixth step]
The sixth step shown in FIG. 8 is a step of injecting the semi-solidified metal M into the mold 105, and is the final step of the die casting method. Specifically, in the sixth step, the plunger 21 located at the backward limit position B0 is advanced in the X1 direction by the drive unit 22 and moves to the forward limit position F0. Then, the semi-solidified metal M extruded by the air cylinder 3 and thrown into the injection sleeve 23 in the second step is injected into the mold 105 by the plunger 21. At this time, the bottom portion M1 (solidified metal) is stored in the recess 35 of the movable type 1b so as to block the runner 1d and not obstruct the flow of the semi-solidified metal M having fluidity toward the cavity 1c. After that, the mold is opened and the molded product M0 is ejected by a protruding pin (not shown). Then, the molded product M0 is taken out from the mold 105 by a predetermined take-out device. As the predetermined take-out device, a transfer robot T in which the container C containing the semi-solidified metal M is arranged between the fixed type 1a and the mobile type 1b may be used.

<Second molding method>
With reference to FIGS. 9 to 11, the steps of the second molding method will be described by dividing them into eight steps of the first to eighth steps. Since the fourth to eighth steps of the second molding method are the same as the second to sixth steps of the first molding method, the description thereof will be omitted.

[First step]
The first step shown in FIG. 9 is a step of arranging the container C containing the semi-solidified metal M at a predetermined position between the fixed mold 1a and the mobile mold 1b in the mold open state. Specifically, in the first step, the container C containing the semi-solidified metal M is gripped by the gripping portion T1 of the transporting robot T, and the central axis of the injection sleeve 23 is gripped by the robot arm portion T2 of the transporting robot T. It is placed on α. At this time, one opening C1 (see FIG. 2) on the small diameter side of the container C is arranged in the X2 direction of the pressing portion 31 away from the pressing portion 31. Further, the other opening C2 (see FIG. 2) on the large diameter side of the container C is arranged in contact with the fixed mold 1a. Further, the other opening C2 on the large diameter side of the container C is arranged on the X1 direction side of the injection sleeve 23 so as to face the injection sleeve 23.

[Second step]
In the second step shown in FIG. 10, the pressing portion 31 moves in the X2 direction from the retreat limit position B to the end portion of the container C in the X1 direction (or a predetermined position on the X1 direction side of the end portion of the container C in the X1 direction). It protrudes from the mobile type 1b. As a specific example, the pressing portion 31 moves so as to be located in the X2 direction with respect to the recess 35. The second step may be performed at the same time as the first step, or may be performed before the first step. However, when the second step is performed before the first step, it is necessary to prevent the pressing portion 31 and the container C from interfering with each other.

[Third step]
In the third step shown in FIG. 11, the moving die plate driving mechanism 103 moves the moving die 1b fixed to the fixed die plate 101 and the moving die plate 102 in the X2 direction to perform the mold clamping operation. However, the mold 105 is not completely molded, but when the pressing portion 31 comes into contact with the semi-solidified metal M and the semi-solidified metal M moves slightly in the X2 direction, the mold clamping operation (moving mold) The operation (operation in which 1b approaches the fixed type 1a) is temporarily stopped (interrupted). That is, the mold clamping operation is temporarily stopped (interrupted) when the semi-solidified metal M is peeled off from the container C. When the semi-solidified metal M is peeled off from the container C, it is preferable that the pressing portion 31 is locked so as not to be pushed by the reaction force from the semi-solidified metal M and move in the X1 direction with respect to the main body portion 32.

After that, the same steps as the second to sixth steps of the first molding method are performed. The second molding method is different from the first molding method in which the semi-solid metal M is peeled from the container C by the air cylinder 3, and the semi-solid metal M is peeled from the container C by using the mold clamping force of the die casting machine 100. The method.

<Third molding method>
With reference to FIGS. 12 to 14, the steps of the third molding method will be described by dividing them into seven steps of the first to seventh steps. Since the fourth to seventh steps of the third molding method are the same as the third to sixth steps of the first molding method, the description thereof will be omitted.

[First step]
The first step shown in FIG. 12 is a step of arranging the container C containing the semi-solidified metal M at a predetermined position between the fixed mold 1a and the mobile mold 1b in the mold open state. Specifically, in the first step, the container C containing the semi-solidified metal M is gripped by the gripping portion T1 of the transporting robot T, and the central axis of the injection sleeve 23 is gripped by the robot arm portion T2 of the transporting robot T. It is placed on α. At this time, one opening C1 (see FIG. 2) on the small diameter side of the container C is arranged in the X2 direction of the pressing portion 31 away from the pressing portion 31. Further, the other opening C2 (see FIG. 2) on the large diameter side of the container C is arranged in contact with the fixed mold 1a. Further, the other opening C2 on the large diameter side of the container C is arranged on the X1 direction side of the injection sleeve 23 so as to face the injection sleeve 23.

[Second step]
In the second step shown in FIG. 13, the pressing portion 31 moves from the backward limit position B to the forward limit position F. That is, the pressing portion 31 protrudes from the movable mold 1b to the limit. The movable type 1b and the fixed type 1a are separated by a distance that allows the container C and the protruding pressing portion 31 to be arranged side by side in the X direction. The second step may be performed at the same time as the first step, or may be performed before the first step. However, it is necessary to adjust the distance (die height) between the fixed die plate 101 and the moving die plate 102 so that the pressing portion 31 and the container C do not interfere with each other.

[Third step]
In the third step shown in FIG. 14, the moving die plate driving mechanism 103 moves the moving die 1b fixed to the fixed die plate 101 and the moving die plate 102 in the X2 direction to perform the mold clamping operation. The mold 1 is completely molded. At this time, it is preferable that the pressing portion 31 is locked so as not to be pushed away by the reaction force from the semi-solidified metal M and move in the X1 direction with respect to the main body portion 32.

After that, the same steps as the third to sixth steps of the first molding method are performed. The third molding method is different from the second molding method in which the die casting machine 100 removes the semi-solidified metal M from the container C and the air cylinder 3 extrudes the semi-solidified metal M from the container C. This is a molding method in which the die casting machine 100 performs both peeling the metal M from the container C and extruding the semi-solidified metal M from the container C.

(Effect of embodiment)
The effects of this embodiment will be described below.

In the present embodiment, as described above, the semi-solidified metal M in the tubular container C arranged between the fixed mold 1a and the mobile mold 1b is pushed into the injection sleeve 23 and thrown into the injection sleeve 23 in the mold open state. An air cylinder 3 is provided. As a result, the semi-solidified metal M in the container C arranged between the fixed mold 1a and the mobile mold 1b can be pushed out by the air cylinder 3 and directly put into the injection sleeve 23. As a result, it is not necessary to directly hold the semi-solidified metal M by a robot chuck or the like as in the conventional case, so that it is possible to prevent the shape of the semi-solidified metal M charged into the injection sleeve 23 from being deformed. Further, since the semi-solidified metal M is arranged between the fixed mold 1a and the mobile mold 1b while maintaining the state of being housed in the container C, is pushed out by the air cylinder 3 and is directly thrown into the injection sleeve 23, it is once. Compared with the case where the semi-solidified metal M is taken out of the container C and gripped by the robot chuck, it is possible to suppress heat from being taken away from the semi-solidified metal M charged into the injection sleeve 23. Further, the air cylinder 3 can exhibit stable performance in a high temperature environment as compared with a mechanism for pushing out a semi-solidified metal M such as an electric type or a hydraulic type.

Further, in the present embodiment, as described above, the air cylinder 3 is provided in the movable mold 1b and is arranged at a position overlapping with the injection sleeve 23 when viewed from the moving direction of the mobile mold 1b. As a result, the injection sleeve 23 is provided in the fixed mold 1a, and the air cylinder 3 is provided in the movable mold 1b, so that the container C is arranged between the injection sleeve 23 and the air cylinder 3, so that the air cylinder 3 Therefore, the semi-solidified metal M in the container C can be easily pushed out toward the injection sleeve 23. Further, since the air cylinder 3 is arranged at a position where it overlaps with the injection sleeve 23 when viewed from the moving direction of the movable mold 1b, the semi-solidified metal M can be pushed straight from the air cylinder 3 toward the injection sleeve 23. As a result, it is possible to prevent the shape of the semi-solidified metal M charged into the injection sleeve 23 from being deformed.

Further, in the present embodiment, as described above, the air cylinder 3 provided in the mobile mold 1b is moved to the fixed mold 1a side together with the mobile mold 1b by the moving die plate drive mechanism 103, thereby halving the inside of the container C. It is configured to extrude the solidified metal M. As a result, the semi-solidified metal M can be pushed out of the container C by utilizing the mold clamping operation of the die casting machine 100, so that the semi-solidified metal M can be pushed by a large external force. As a result, the semi-solidified metal M in close contact with the container C can be easily peeled off.

Further, in the present embodiment, as described above, the air cylinder 3 has a pressing portion 31 that comes into contact with the semi-solidifying metal M in the container C and pushes out the semi-solidifying metal M, and a pressing portion 31 in the moving direction of the movable type 1b. A main body 32 is provided. Thereby, when the semi-solidified metal M is put into the injection sleeve 23, the portion that is in direct contact with the semi-solidified metal M and the portion that is not in direct contact with the semi-solidified metal M can be separated. Therefore, when the semi-solidified metal M is put into the injection sleeve 23, it is possible to prevent the main body 32 from being directly exposed to the high-temperature semi-solidified metal M.

Further, in the present embodiment, as described above, the through hole for communicating the space portion 33 in which the main body portion 32 is arranged and the end portion of the mobile type 1b on the fixed mold 1a side and the space portion 33 in the movable type 1b. 34 is provided, and the pressing portion 31 is passed through the through hole 34 so as to close the through hole 34. As a result, the through hole 34 is closed by the pressing portion 31, so that it is possible to prevent the semi-solidified metal M from reaching the space portion 33 through the through hole 34 at the time of injection. This makes it possible to prevent the main body 32 from being directly exposed to the high-temperature semi-solidified metal M at the time of injection.

Further, in the present embodiment, as described above, the air cylinder 3 is moved to the fixed mold 1a side together with the moving mold 1b by the moving die plate drive mechanism 103, thereby pressing the semi-solidified metal M in the container C. As a result, after the semi-solidified metal M is peeled off from the container C, the semi-solidified metal M is extruded by the main body 32, and the semi-solidified metal M is charged into the injection sleeve 23. Here, in general, the semi-solidified metal M is firmly adhered to the container C. Therefore, in order to remove the semi-solidified metal M from the container C, it is necessary to first peel the semi-solidified metal M from the container C, and a relatively large external force (pressing pressure) is required. Therefore, with the above configuration, the semi-solidified metal M can be easily peeled off from the container C by utilizing the mold clamping operation of the die casting machine 100, and a large external force cannot be mechanically exerted. Even if the air cylinder 3 is used, the semi-solidified metal M can be reliably pushed out from the container C and charged into the injection sleeve 23.

Further, in the present embodiment, as described above, the air cylinder 3 is configured to extrude the semi-solidified metal M in the vicinity of the divided surface 10a of the fixed mold 1a in the injection sleeve 23. As a result, the semi-solidified metal M can be arranged at a position close to the cavity 1c, so that the semi-solidified metal M can be introduced into the cavity 1c by pushing out a relatively short distance when ejecting by the plunger 21. As a result, galling (seizure) of the plunger 21 can be suppressed, and air entrainment when the semi-solidified metal M is moved in the sleeve can be suppressed.

Further, in the present embodiment, as described above, the tip portion 21a on the movable type 1b side of the plunger 21 is arranged inside the fixed die plate 101 when the movement is started for injection. As a result, the moving distance of the plunger 21 for injection can be shortened as compared with the case where the plunger 21 is arranged on the outside of the fixed die plate 101 (the side separated from the mold 105). As a result, the injection time can be shortened, so that the molding cycle can be shortened.

Further, in the present embodiment, as described above, the air cylinder 3 is arranged in one opening C1 of the container C, and the solidified bottom M1 of the semi-solidified metal M is pressed to press the bottom M1 in the container C. The semi-solid metal M containing the above is extruded into the movable mold 1b at a position different from that of the runner 1d of the mold 105 and at a position overlapping the injection sleeve 23 when viewed from the moving direction of the mobile mold 1b. A recess 35 for storing the bottom portion M1 ejected by 21 is provided. As a result, when the semi-solidified metal M is extruded into the mold 105 by the plunger 21, the semi-solid metal M is provided at a position different from the runner 1d and overlapping with the injection sleeve 23 when viewed from the moving direction of the moving mold 1b. The bottom portion M1 of the semi-solidified metal M can be stored in the recess 35. As a result, the bottom M1 can be placed in the recess 35 deviated from the runner 1d, so that the bottom M1 blocks the runner 1d and the bottom M1 impedes the flow of the semi-solidified metal M through the runner 1d. Can be suppressed.

[Modification example]
The embodiments disclosed this time should be considered as exemplary in all respects and not restrictive. The scope of the present invention is shown not by the description of the above embodiment but by the scope of claims, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

For example, in the above embodiment, an example in which the extrusion mechanism is composed of an air cylinder is shown, but the present invention is not limited to this. In the present invention, the extrusion mechanism may be configured to have a configuration other than an air cylinder such as a hydraulic cylinder or a motor.

Further, in the above embodiment, an example in which the extrusion mechanism is provided in a movable type is shown, but the present invention is not limited to this. In the present invention, the extrusion mechanism may be provided in a fixed mold.

Further, in the above embodiment, an example of peeling the semi-solidified metal in close contact with the container by an extrusion mechanism has been shown, but the present invention is not limited to this. In the present invention, instead of peeling the semi-solidified metal in close contact with the container by an extrusion mechanism, the semi-solidified metal in close contact with the container may be peeled off by a configuration other than the extrusion mechanism such as a dedicated peeling device.

Further, in the above embodiment, an example in which a concave portion is provided in the movable type is shown, but the present invention is not limited to this. In the present invention, the movable mold does not have to be provided with a recess.

Further, in the above embodiment, an example is shown in which the tip portion on the movable mold side of the plunger is arranged inside the fixed die plate when starting the movement for injection, but the present invention is limited to this. Absent. In the present invention, the movable end of the plunger may be located outside the fixed die plate when it begins to move for injection.

Further, in the above embodiment, an example in which the extrusion mechanism and the injection sleeve overlap each other in the moving direction of the moving type is shown, but the present invention is not limited to this. In the present invention, the extrusion mechanism and the injection sleeve do not have to overlap each other in the movable moving direction.

Further, in the above embodiment, an example in which an extrusion mechanism that operates linearly in a predetermined direction (X direction) is provided has been shown, but the present invention is not limited to this. In the present invention, an extrusion mechanism that performs an operation other than a linear operation such as a rotational operation may be provided.

1a Fixed type 1b Mobile type 3 Air cylinder (extrusion mechanism)
10a Divided surface 21 Plunger 21a Plunger tip 23 Injection sleeve 31 Pressing part 32 Main body 33 Space part 34 Through hole 35 Recessed 100 Die casting molding machine 101 Fixed die plate 103 Moving die plate drive mechanism (molding mechanism)
105 Mold C Container C1 One side opening M Semi-solidified metal M1 Bottom T Transfer robot (transfer device)
Center axis of α injection sleeve

Claims (11)

Molds, including fixed and mobile dies,
A tubular injection sleeve attached to the fixed mold and
A mold clamping mechanism that moves the moving mold with respect to the fixed mold to perform mold clamping of the mold.
An extrusion mechanism that pushes out the semi-solidified metal in a tubular container arranged between the fixed mold and the moving mold in the mold-opened state into the injection sleeve and throws it in.
A die casting machine comprising a plunger for injecting the semi-solidified metal charged into the injection sleeve by the extrusion mechanism into the mold in a mold-clamped state. The die casting machine according to claim 1, wherein the extrusion mechanism is provided in the mobile mold and is arranged at a position overlapping the injection sleeve when viewed from the moving direction of the mobile mold. The extrusion mechanism provided in the mobile mold is configured to extrude the semi-solidified metal in the container by being moved to the fixed mold side together with the mobile mold by the mold clamping mechanism. Item 2. The die casting machine according to item 2. The extrusion mechanism includes a pressing portion that comes into contact with the semi-solidifying metal in the container and pushes out the semi-solidifying metal, and a main body portion that moves the pressing portion in the moving direction of the moving type. The die casting machine according to any one of 3. The movable mold is provided with a space portion in which the main body portion is arranged and a through hole for communicating the end portion of the mobile mold on the fixed mold side and the space portion.
The die casting machine according to claim 4, wherein the pressing portion is passed through the through hole so as to close the through hole. After the semi-solidified metal is peeled from the container by pressing the semi-solidified metal in the container by moving the extrusion mechanism to the fixed mold side together with the moving mold by the mold clamping mechanism. The die casting machine according to claim 4 or 5, wherein the semi-solidified metal is extruded by the main body and the semi-solidified metal is put into the injection sleeve. The die casting machine according to any one of claims 1 to 6, wherein the extrusion mechanism includes an air cylinder. The die casting machine according to any one of claims 1 to 7, wherein the extrusion mechanism is configured to extrude the semi-solidified metal in the vicinity of the divided surface of the fixed mold in the injection sleeve. Further provided with a fixed die plate to which the fixed mold is attached
The die casting according to any one of claims 1 to 8, wherein the tip portion of the plunger on the movable mold side is arranged inside the fixed die plate when starting the movement for injection. Machine. The extrusion mechanism is arranged in one opening of the container, and is configured to extrude the semi-solidified metal including the bottom of the semi-solidified metal by pressing the solidified bottom of the semi-solidified metal.
The movable mold is provided with a recess for storing the bottom portion ejected by the plunger at a position different from the runner of the mold and at a position overlapping the injection sleeve when viewed from the moving direction of the mobile mold. The die casting machine according to any one of claims 1 to 9. A step of arranging the container between a fixed type and a mobile type by using a transport device that holds a tubular container containing a semi-solidified metal, and
A step of extruding the semi-solidified metal in the container arranged between the fixed mold and the mobile mold into an injection sleeve by using an extrusion mechanism provided in the mobile mold.
A step of mold-clamping the mobile mold and the fixed mold extruded by the extrusion mechanism and the semi-solidified metal is charged into the injection sleeve.
A die casting method comprising a step of injecting the semi-solidified metal extruded into the injection sleeve into a molded mold using a plunger.

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