JP7246887B2 - die casting machine - Google Patents

Description

TECHNICAL FIELD This invention relates to a die casting machine, and more particularly to a die casting machine comprising a plunger and a sleeve.

BACKGROUND ART Conventionally, a die-casting machine including a plunger and a sleeve is known (see Patent Document 1, for example).

The above Patent Document 1 discloses a die casting machine that includes a fixed die plate, a plunger, and a sleeve including a hot water supply port. The stationary die plate has one surface to which the stationary die is attached and the other surface opposite to the one surface. The sleeve extends in the thickness direction of the stationary die plate (the direction in which the one surface and the other surface are aligned). The entire hot water supply port of the sleeve is arranged on the opposite side (outside) of the other surface of the stationary die plate. Therefore, the amount of projection of the sleeve from the other surface of the stationary die plate is at least greater than the length of the molten metal supply port in the thickness direction of the stationary die plate.

JP 2015-123467 A

Here, although it is not specified in Patent Document 1, it has been conventionally required to suppress a decrease in the temperature of the molten metal in the sleeve. If the temperature of the molten metal drops in the sleeve, the fluidity of the molten metal (ease of flow of the molten metal) decreases, leading to poor filling of the molten metal in the mold, molding defects such as blowholes, and heat loss of the molten metal. Due to the deformation (bending) of the sleeve due to the friction, problems such as galling of the plunger (excessive wear on the sliding surface between the plunger and the inner surface of the sleeve) may occur. A major factor in the drop in the melt temperature in the sleeve is the loss of heat by the sleeve in contact with the melt. Therefore, the larger the contact area between the sleeve and the molten metal, the easier it is for the temperature of the molten metal to drop in the sleeve. In the die casting machine described in Patent Document 1 as well, there is a demand for further improvement in order to suppress the drop in the temperature of the molten metal inside the sleeve.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a die casting machine capable of effectively suppressing a decrease in the temperature of the molten metal inside the sleeve. It is to be.

In order to achieve the above object, a die casting machine in one aspect of the present invention includes a fixed die plate, a plunger, and a hot water supply port. a sleeve held by the die plate, wherein at least a part of the hot water supply port is arranged on the one surface side of the fixed die plate on the side opposite to the one surface on which the fixed mold is attached, and fixed The die plate is arranged at a position corresponding to the hot water supply opening on the upper side of the sleeve so that the hot water supply opening is exposed, and has a concave portion recessed from the other surface toward the other surface and a through hole in which the sleeve is arranged. When viewed from the axial direction of the sleeve, the recess includes a pair of side surfaces facing each other and having lower ends connected to the through hole. configured to be connected .

In the die casting machine according to one aspect of the present invention, as described above, at least part of the spout of the sleeve held by the fixed die plate is arranged on the side opposite to the one surface of the fixed die plate to which the fixed die is attached. By arranging it on the one surface side rather than the other surface, compared to the conventional configuration in which the entire hot water supply port is arranged on the opposite side (outside) of the other surface to the one surface side, the fixed mold is more attached. Since the hot water supply port can be arranged at a close position, the amount of protrusion of the sleeve from the other surface of the fixed die plate can be reduced, and the sleeve can be formed shorter. As a result, the contact area between the molten metal and the inner surface of the sleeve can be made smaller, and the molten metal can be changed from a thin film to a mass in the sleeve more quickly, so the temperature of the molten metal in the sleeve can be lowered. can be effectively suppressed.

In addition, by shortening the sleeve, the moving distance of the plunger during injection can be shortened, so the cycle time of the injection process can be shortened, and entrainment of air into the molten metal can be suppressed. . In addition, compared to the conventional art, the fixed die plate does not restrict the periphery of the sleeve, and the amount of protrusion of the sleeve, which is easily deformed by heat, can be reduced. can. As a result, galling of the plunger can be suppressed. In addition, since at least a part of the hot water supply port arranged closer to one surface than the other surface of the fixed die plate can be exposed by the concave portion, the hot water supply opening arranged closer to the one surface than the other surface can be exposed. Molten metal can be easily poured from at least a part of the mouth . As a result, even when at least part of the hot water supply opening of the sleeve is provided inside the fixed die plate , the molten metal can be easily poured into the hot water supply opening.

In this case, preferably, in the thickness direction of the fixed die plate, the depth of the recess from the other surface is greater than the distance from the other surface to the end of the hot water supply port on the one surface side. According to this structure, the entire molten metal supply port can be reliably exposed by the recess, so that the molten metal can be more easily poured into the molten metal supply port.

In the configuration in which the depth from the other surface of the recess in the thickness direction is greater than the distance from the other surface to the end of the hot water supply port on the one surface side, the sleeve preferably has a cylindrical shape extending in the horizontal direction. , the recess is provided above the height position of the center of the sleeve, and the fixed die plate holds the sleeve in a range larger than half the circumferential direction of the sleeve at the position where the recess is provided in the thickness direction. there is With this configuration, even at the position where the recess is provided in the thickness direction, the fixed die plate can constrain the sleeve to restrict its movement in the radial direction, thereby preventing the sleeve from bending toward the recess. can be prevented. As a result, galling of the plunger can be further suppressed.

In the configuration in which the fixed die plate is provided with the concave portion, preferably, the entire hot water supply port is arranged closer to the one surface side than the other surface. With this configuration, the sleeve can be formed shorter than the case where only a part of the hot water supply port is arranged on the one surface side of the fixed die plate rather than the other surface. It is possible to more effectively suppress the decrease in the temperature of the molten metal.

In this case, preferably, the outer end face of the sleeve provided with the opening for introducing the plunger inside is positioned substantially on the same plane as the other surface. With this configuration, the amount of protrusion of the sleeve from the other surface of the stationary die plate can be reduced to substantially zero, so the sleeve can be formed even shorter. As a result, it is possible to more effectively suppress a decrease in the temperature of the molten metal inside the sleeve. In addition, since the amount of protrusion of the sleeve from the other surface of the fixed die plate can be made substantially zero, galling of the plunger can be further suppressed.

In the configuration in which the fixed die plate is provided with the recess, preferably, the inner surface of the recess is inclined so as to widen toward the opening of the recess on the other surface side. With this configuration, it is possible to easily introduce a configuration such as a ladle for pouring molten metal into the molten metal supply port to the inside of the recess when pouring molten metal.

In the configuration in which the fixed die plate is provided with the concave portion, the fixed die plate preferably includes a heat insulating member that is provided so as to avoid the concave portion and contacts the outer surface of the sleeve. With this configuration, the heat insulating member can prevent the heat of the sleeve from being taken away by the fixed die plate in an open state without blocking the hot water supply port. As a result, it is possible to more effectively suppress a decrease in the temperature of the molten metal inside the sleeve.

The die casting machine according to the above aspect preferably further includes a lid portion that openably and closably closes the hot water supply port, at least a part of which is arranged closer to one surface than the other surface. According to this configuration, the lid portion can prevent the molten metal from leaking from the molten metal supply opening during injection.

According to the present invention, as described above, it is possible to effectively suppress a decrease in the temperature of the molten metal inside the sleeve.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed typically the whole structure of the die-casting machine by one Embodiment. FIG. 2 is a partially enlarged view of the sleeve and stationary die plate of the die casting machine of FIG. 1; FIG. 5 is a cross-sectional view taken along line 500-500 of FIG. 2;

Embodiments embodying the present invention will be described below with reference to the drawings.

[Embodiment]
The configuration of a die casting machine 100 according to one embodiment will be described with reference to FIGS. 1 to 3. FIG.

(Configuration of die casting machine)
As shown in FIG. 1, the die casting machine 100 of this embodiment is a horizontal machine in which a movable mold M1 is horizontally moved. Further, the die casting machine 100 is a machine of a cold chamber system, and a molten metal (a liquid metal material is ) to manufacture a die-cast product (molded product).

The die casting machine 100 includes a pouring device 1, an injection device 2 including a plunger 21, a mold clamping device 3, a tie bar 4, a movable die plate 5, a fixed die plate 6, a sleeve 7, and a lid portion 8. It has

Here, in the following description, the vertical direction is defined as the Z direction, and the thickness direction of the fixed die plate 6 among the horizontal directions is defined as the X direction. The direction from the one surface 6a of the fixed die plate 6 to which the fixed die M2 is attached to the other surface 6b is the X1 direction, and the opposite direction is the X2 direction. The X direction is also the direction in which the sleeve 7 extends and the moving direction of the movable mold M1. In addition, of the horizontal directions, the direction orthogonal to the X direction is defined as the Y direction.

The sleeve 7 of the die casting machine 100 of this embodiment is formed extremely shorter than a conventional general sleeve. That is, the sleeve 7 is configured such that the molten metal is poured from the molten metal supply port 71 provided at a position closer to the mold M (fixed mold M2) than a conventional general sleeve. The hot water supply port 71 is arranged closer to the one surface 6a side (X2 direction side) than the other surface 6b of the fixed die plate 6. As shown in FIG. Details will be described later.

The pouring device 1 is configured to draw molten metal from a holding furnace (not shown) and pour it into the sleeve 7 . The pouring device 1 includes a ladle 11 for drawing molten metal and a robot arm 12 for moving the ladle 11 provided at the tip. The pouring device 1 is configured to pour molten metal into the sleeve 7 by tilting the ladle 11 with the ladle 11 placed inside a recess 64 of the fixed die plate 6 , which will be described later. That is, the pouring device 1 is configured to pour molten metal into the sleeve 7 by inclining the ladle 11 with the ladle 11 arranged on the X2 direction side of the other surface 6b of the fixed die plate 6. .

The injection device 2 includes a plunger 21 and a plunger moving device 22 . The plunger 21 is introduced inside the sleeve 7 through an opening 72 provided at the end of the sleeve 7 in the X1 direction. The plunger 21 has a plunger tip 21a fitted to the inner surface of the sleeve 7 and a rod-like plunger rod 21b supporting the plunger tip 21a from the X1 direction side.

The plunger moving device 22 is configured to move the plunger 21 (plunger tip 21a) forward and backward in the sleeve 7 in the X direction. As an example, the plunger moving device 22 can be configured by a hydraulic cylinder driven by a hydraulic circuit. In addition, the plunger moving device 22 can be configured by an electric motor or a cylinder using air pressure.

The mold clamping device 3 is connected to the movable die plate 5 and configured to reciprocate the movable die plate 5 along the tie bars 4 in the X direction. That is, the mold clamping device 3 is configured to clamp the mold M and open the mold. The mold clamping device 3 includes a toggle mechanism (not shown). As an example, the mold clamping device 3 can be configured by a hydraulic cylinder driven by a hydraulic circuit. In addition, the mold clamping device 3 can be configured by an electric motor or a cylinder using air pressure.

The tie bar 4 has a bar shape extending in the X direction. The tie bars 4 are provided at the four corners of the movable die plate 5 and the stationary die plate 6, respectively. The tie bars 4 are configured to guide movement of the movable die plate 5 with respect to the fixed die plate 6 by the mold clamping device 3 .

The moving die plate 5 is a plate member having a thickness direction in the X direction (a plate member extending in a direction orthogonal to the X direction). The movable die plate 5 is configured such that the movable mold M1 is attached to one surface 5a on the X1 direction side. The movable die plate 5 has the other surface 5b on the X2 direction side connected to the driving device.

<Structure of fixed die plate>
As shown in FIG. 2, the fixed die plate 6 is a plate member having a thickness direction in the X direction (a plate member extending in a direction perpendicular to the X direction). The stationary die plate 6 is configured such that the stationary die M2 is attached to one surface 6a on the X2 direction side.

The fixed die plate 6 includes a fixed die plate body 61 and a heat insulating member 62 installed on the fixed die plate body 61 and inside which the sleeve 7 is arranged. The heat insulating member 62 is a cylindrical bush.

A through hole 63 and a recess 64 are provided in the fixed die plate main body 61 .

The through hole 63 is provided at a position communicating with the runner M3 of the fixed mold M2. The through hole 63 extends in the X direction. The sleeve 7 and the heat insulating member 62 are arranged inside the through hole 63 . Specifically, the heat insulating member 62 is fitted in the through hole 63 in contact with the inner surface thereof. A sleeve 7 is fitted inside the heat insulating member 62 so as to be in contact with the inner surface thereof.

The recessed portion 64 is a recessed portion that is recessed from the other surface 6b toward the one surface 6a. The concave portion 64 is arranged on the upper side (Z1 direction side) of the sleeve 7 so that the hot water supply port 71 is exposed. Further, the concave portion 64 is arranged at a position corresponding to the hot water supply port 71 . The recess 64 is connected to the through hole 63 from above.

The recess 64 is provided above the height position Z0 of the center C of the sleeve 7 . That is, the recess 64 is connected to the through hole 63 at a position above the height position Z0 of the center C of the sleeve 7 .

Specifically, the recess 64 has a pair of side surfaces 64a, a bottom surface 64b, and a top surface 64c as inner surfaces. The pair of side surfaces 64a, bottom surface 64b, and top surface 64c are all flat surfaces. In addition, the upper surface 64c is an example of the "inner surface" in the claims.

As shown in FIG. 3, the pair of side surfaces 64a are surfaces extending in a direction orthogonal to the Y direction. The pair of side surfaces 64a are arranged to face each other in the Y direction. The pair of side surfaces 64a are connected (forming the opening 65) to the opening 65 (see FIG. 2) at the X1 direction ends. The opening 65 is an introduction port for introducing the ladle 11 (see FIG. 1) inside the recess 64 . The lower ends of the pair of side surfaces 64a are connected to the through hole 63 at a position above the height position Z0 of the center C of the sleeve 7. As shown in FIG.

As shown in FIG. 2, the bottom surface 64b is a surface extending in a direction perpendicular to the X direction. The bottom surface 64b connects the ends of the pair of side surfaces 64a in the X2 direction. That is, the bottom surface 64b is arranged on the X2 direction side of the pair of side surfaces 64a. The bottom surface 64b is positioned closest to the X2 direction side (one surface 6a side) in the recessed portion 64 . That is, the bottom surface 64b determines the depth of the recess 64 (the depth D1 of the recess 64 from the other surface 6b in the X direction).

In the X direction (thickness direction of fixed die plate 6), depth D1 (distance from other surface 6b to bottom surface 64b) from other surface 6b of recess 64 is the distance from other surface 6b to one surface 6a of hot water supply port 71. greater than the distance D2 to the end. Further, depth D1 of recess 64 from other surface 6b (distance from other surface 6b to bottom surface 64b) is greater than width D3 of hot water supply port 71 in the X direction. Note that the distance D2 is greater than the width D3.

The upper surface 64c is a surface extending in the Y direction. In addition, the upper surface 64c is inclined upward in the X1 direction. That is, the upper surface 64c is inclined so as to widen toward the opening 65 of the recess 64 on the side of the other surface 6b. Thus, the fixed die plate main body 61 is formed so that the opening 65 for introducing the ladle 11 inside the recess 64 is widened.

Here, as described above, the entire recess 64 is provided above the height position Z0 of the center C of the sleeve 7 . For this reason, the fixed die plate main body 61 (fixed die plate 6) is arranged at a position where the concave portion 64 is provided in the thickness direction (X direction) (on the other surface 6b side of the end of the hot water supply port 71 on the one surface 6a side), The sleeve 7 is supported over a range larger than half the circumference of the sleeve 7 (see FIG. 3). At this time, the fixed die plate main body 61 (fixed die plate 6 ) supports at least the sleeve 7 in a range including the entire lower half circumference of the sleeve 7 .

That is, the fixed die plate main body 61 (fixed die plate 6) reliably restrains the periphery of the sleeve 7 to prevent the sleeve 7 from being deformed by heat. As a result, the fixed die plate main body 61 (fixed die plate 6) can prevent the thermal deformation of the sleeve 7, so that galling of the plunger 21 caused by the thermal deformation of the sleeve 7 can be suppressed. Become.

The heat insulating member 62 is a member for suppressing a drop in temperature of the sleeve 7 (molten metal) due to heat transfer from the sleeve 7 to the fixed die plate main body 61 . Specifically, the heat insulating member 62 is made of a material that does not conduct heat easily (a material with low thermal conductivity) such as ceramics. The heat insulating member 62 has a cylindrical shape whose outer surface contacts the fixed die plate main body 61 and whose inner surface contacts the outer surface of the sleeve 7 .

The heat insulating member 62 is provided so as to avoid a recessed portion 64 provided at a position corresponding to the hot water supply port 71 of the sleeve 7 . That is, the heat insulating member 62 is provided with a notch 62a on the X1 direction side so as not to hinder the pouring of hot water into the hot water supply port 71 of the sleeve 7 . Although not shown, the heat insulating member 62 may be provided with grooves through which cooling oil flows. Also, although not shown, a heat insulating member may be provided between the fixed die plate 6 and the fixed mold M2.

<Construction of the sleeve>
The sleeve 7 has a cylindrical shape extending in the X direction (horizontal direction). The sleeve 7 communicates with the runner M3 of the stationary mold M2 at the end in the X2 direction. The sleeve 7 has a plunger 21 arranged inside. The sleeve 7 is held by the fixed die plate 6 while being inserted through the fixed die plate 6 . The sleeve 7 is arranged inside the through hole 63 of the fixed die plate main body 61 in a state of being fitted to the heat insulating member 62 .

The sleeve 7 includes a hot water supply port 71 . The hot water supply port 71 is an inlet portion opened upward (Z1 direction) for pouring the molten metal into the sleeve 7 .

Here, at least part of the hot water supply port 71 of the present embodiment is arranged closer to the one surface 6a than the other surface 6b opposite to the one surface 6a to which the fixed die M2 of the fixed die plate 6 is attached. there is That is, at least part of the hot water supply port 71 is arranged on the X2 direction side of the other surface 6b.

Specifically, the entire hot water supply port 71 is arranged closer to the one surface 6a than the other surface 6b. That is, the X1 direction end of hot water supply port 71 is arranged at a position spaced apart from the other surface 6b in the X2 direction. The hot water supply port 71 is arranged directly below the recess 64 of the fixed die plate 6 . The hot water supply port 71 is exposed through the recess 64 and the notch 62a of the heat insulating member 62 so that hot water can be poured.

In addition, the outer end surface 73 of the sleeve 7 (the end surface on the X1 direction side where the opening 72 for introducing the plunger 21 is provided) is substantially flush with the other surface 6b (the outer end surface 73 and the other surface 6b are flush with each other). (including cases where The X-direction distance between the X1-direction end of hot water supply port 71 and the other surface 6b is preferably smaller than the X-direction length of plunger tip 21a.

<Structure of lid>
The lid portion 8 is configured to openably close the hot water supply port 71 (at least a part of which is arranged closer to the one surface 6a than the other surface 6b). Specifically, the lid portion 8 includes a drive portion (not shown) such as an air cylinder, and is driven by the drive portion to open the position (position during pouring) of the hot water supply port 71 and the position at which the hot water supply port 71 is opened. It is configured to be movable to a position (position at the time of injection) that closes the In this way, the lid portion 8 can prevent the molten metal from overflowing from the molten metal supply port 71 during injection by closing the molten metal supply port 71 . The lid portion 8 is made of a predetermined heat-resistant material so that it does not change in quality even if it comes into contact with the molten metal.

<Molding operation by die-casting machine>
Next, the molding operation (pouring process and injection process) by the die casting machine 100 will be described.

First, molten metal is poured into the sleeve 7 through the pouring port 71 by the pouring device 1 in a state where the lid portion 8 is opened (a state in which the pouring port 71 is exposed). Specifically, the ladle 11 of the pouring device 1 is moved inside the recess 64 of the fixed die plate 6 to pour molten metal into the sleeve 7 . That is, instead of pouring molten metal on the X1 direction side of the other surface 6b of the fixed die plate 6 as in the conventional art, molten metal is poured on the X2 direction side of the other surface 6b, which is a position close to the fixed mold M2.

Here, the sleeve 7 of this embodiment is not a conventional sleeve long in the X direction, but a sleeve extremely short in the X direction such that the outer end surface 73 is positioned substantially on the same plane as the other surface 6b. Therefore, during pouring, the molten metal spreads throughout the X direction within the sleeve 7 more quickly than before, and the thickness of the molten metal inside the sleeve 7 increases (from a film to a lump) more quickly than before. That is, since the period of contact with the sleeve 7 when the molten metal is in the form of a film (thin) can be shortened, the die casting machine 100 can effectively suppress the temperature drop of the molten metal. is possible. In addition, since the sleeve 7 is extremely short in the X direction, the contact area between the molten metal and the sleeve 7 can be made smaller than before when pouring the molten metal. can be effectively suppressed.

Next, the lid portion 8 is moved from the position at which the hot water supply port 71 is opened (the position during pouring) to the position at which the hot water supply port 71 is closed (the position during injection).

Next, the plunger 21 is advanced to inject the molten metal into the mold M (cavity). Since the sleeve 7 is much shorter in the X direction than the conventional one, the moving distance of the plunger 21 can be shortened. Therefore, it is possible to shorten the time required for moving the plunger 21 (time for the injection process). Further, the stroke length of the plunger 21 can be adjusted by adjusting the length of the runner M3 (the runner M3 positioned coaxially with the sleeve 7) on the mold M side according to each molded product. Also, by adjusting the diameter of the sleeve 7 at the design stage, it is possible to change the maximum amount of hot water that can be injected.

Next, at a predetermined timing after the start of mold opening, the plunger 21 is retracted to return to the original position before advancing. Also, the lid portion 8 is moved from the position where the hot water supply port 71 is closed (the position during injection) to the position where the hot water supply port 71 is opened (the position during pouring).

(Effect of Embodiment)
Effects of the present embodiment will be described.

In this embodiment, as described above, at least part of the hot water supply port 71 of the sleeve 7 held by the fixed die plate 6 is arranged on the side opposite to the one surface 6a of the fixed die plate 6 to which the fixed mold M2 is attached. By arranging it on the one surface 6a side rather than the other surface 6b, the fixed mold M2 is arranged more than the conventional configuration in which the entire hot water supply port is arranged on the opposite side (outside) of the other surface to the one surface side. Moreover, since the hot water supply port 71 can be arranged at a position closer to the surface 6b, the amount of protrusion of the sleeve 7 from the other surface 6b can be reduced, and the sleeve 7 can be formed shorter. As a result, the contact area between the molten metal and the inner surface of the sleeve 7 can be made smaller, and the molten metal can be changed from a thin film to a mass within the sleeve 7 more quickly. A decrease in temperature can be effectively suppressed.

In addition, by shortening the sleeve 7, the moving distance of the plunger 21 during injection can be shortened, so that the cycle time of the injection process can be shortened, and entrainment of air into the molten metal can be suppressed. can be done. In addition, compared with the conventional art, the protrusion amount of the protruding portion of the sleeve 7, which is easily deformed by heat, can be reduced without the periphery being restrained by the fixed die plate 6, so deformation of the sleeve 7 due to heat is suppressed. can do. As a result, galling of the plunger 21 can be suppressed.

In the present embodiment, as described above, the fixed die plate 6 is arranged at a position corresponding to the hot water supply port 71 on the upper side of the sleeve 7 so that the hot water supply port 71 is exposed, and the other surface 6b is connected to the one surface 6a. A concave portion 64 is provided which is recessed toward the . As a result, at least a portion of the hot water supply port 71 arranged closer to the one surface 6a than the other surface 6b of the fixed die plate 6 can be exposed by the recess 64, so that Molten metal can also be poured from at least a part of the hot water supply port 71 arranged on the 6a side. As a result, even when at least part of the hot water supply opening 71 of the sleeve 7 is provided inside the fixed die plate 6, the molten metal can be easily poured into the hot water supply opening 71.

In the present embodiment, as described above, in the thickness direction of the fixed die plate 6, the depth of the recess 64 from the other surface 6b is greater than the distance from the other surface 6b to the end of the hot water supply port 71 on the one surface 6a side. is also big. As a result, the entire molten metal supply port 71 can be reliably exposed by the concave portion 64 , so that the molten metal can be poured into the molten metal supply port 71 more easily.

In this embodiment, as described above, the sleeve 7 has a cylindrical shape extending in the horizontal direction, the recess 64 is provided above the height position Z0 of the center C of the sleeve 7, and the fixed die plate 6 holds the sleeve 7 over a range larger than half the circumference of the sleeve 7 at the position where the concave portion 64 is provided in the thickness direction. As a result, even at the position where the recess 64 is provided in the thickness direction, the stationary die plate 6 can restrain the sleeve 7 and restrict its movement in the radial direction. can be prevented. As a result, galling of the plunger 21 can be further suppressed.

In this embodiment, as described above, the entire hot water supply port 71 is arranged closer to the one surface 6a than the other surface 6b. As a result, the sleeve 7 can be formed even shorter than in the case where only a part of the hot water supply port 71 is arranged closer to the one surface 6a than the other surface 6b of the fixed die plate 6. It is possible to more effectively suppress the decrease in the temperature of the molten metal inside.

In this embodiment, as described above, the outer end face 73 of the sleeve 7 provided with the opening 72 for introducing the plunger 21 inside is positioned substantially on the same plane as the other surface 6b. As a result, the amount of protrusion of the sleeve 7 from the other surface 6b of the stationary die plate 6 can be made substantially zero, so the sleeve 7 can be formed even shorter. As a result, the drop in the temperature of the molten metal inside the sleeve 7 can be suppressed more effectively. Further, since the amount of protrusion of the sleeve 7 from the other surface 6b of the fixed die plate 6 can be substantially zero, galling of the plunger 21 can be further suppressed.

In this embodiment, as described above, the upper surface 64c of the recess 64 is inclined so as to widen toward the opening 65 of the recess 64 on the side of the other surface 6b. This makes it easier to introduce the ladle 11 into the recess 64 when pouring molten metal.

In this embodiment, as described above, the fixed die plate 6 includes the heat insulating member 62 that is provided so as to avoid the recess 64 and contacts the outer surface of the sleeve 7 . As a result, the heat insulating member 62 can prevent the heat of the sleeve 7 from being taken away by the fixed die plate 6 in a state where the hot water supply port 71 is opened without being blocked. As a result, the drop in the temperature of the molten metal inside the sleeve 7 can be suppressed more effectively.

In this embodiment, as described above, the lid portion 8 that closes the hot water supply port 71 in an openable/closable manner is further provided. As a result, the lid portion 8 can prevent the molten metal from leaking from the molten metal supply port 71 during injection.

[Modification]
It should be noted that the embodiments disclosed this time should be considered as examples and not restrictive in all respects. The scope of the present invention is indicated by the scope of the claims rather than the description of the above-described embodiments, and includes all modifications within the meaning and scope equivalent to the scope of the claims.

For example, in the above-described embodiment, the outer end surface of the sleeve is positioned substantially on the same plane as the other surface of the fixed die plate, but the present invention is not limited to this. In the present invention, as long as the outer end surface of the sleeve is positioned near the other surface of the fixed die plate, the outer end surface of the sleeve does not have to be positioned substantially on the same plane as the other surface of the fixed die plate. .

Moreover, in the above-described embodiment, an example in which the entire hot water supply port is arranged closer to one surface than the other surface of the fixed die plate is shown, but the present invention is not limited to this. In the present invention, only part of the hot water supply port may be arranged closer to one surface than the other surface of the fixed die plate.

Also, in the above embodiment, an example in which only the upper surface of the recess is inclined was shown, but the present invention is not limited to this. In the present invention, the side surface of the recess may be slanted.

Also, in the above embodiment, an example in which the recess is formed by a pair of side surfaces, a bottom surface and a top surface has been described, but the present invention is not limited to this. In the present invention, the recess may be formed in any shape as long as the hot water supply port is exposed and the ladle can be introduced inside.

Moreover, in the above embodiment, the example in which the die casting machine includes the pouring device was shown, but the present invention is not limited to this. In the present invention, the pouring device may be configured separately from the die casting machine.

Further, in the above embodiment, an example in which the fixed die plate includes a heat insulating member was shown, but the present invention is not limited to this. In the present invention, the stationary die plate does not have to include the heat insulating member.

In the above embodiment, the inner end of the sleeve is positioned on one surface of the fixed die plate (fixed die mounting surface) in the thickness direction of the fixed die plate, but the present invention is limited to this. can't In the present invention, the inner end of the sleeve may extend to the inside of the fixed mold in the thickness direction of the fixed die plate.

Further, in the above embodiment, an example in which the die casting machine is configured horizontally has been shown, but the present invention is not limited to this. In the present invention, the die casting machine may be configured vertically.

6 fixed die plate 6a one surface 6b other surface 7 sleeve 8 lid 21 plunger 62 heat insulating member 64 concave portion 64c upper surface (inner surface)
65 (recess) opening 71 hot water supply port 72 (sleeve) opening 73 outer end face 100 die casting machine C center of sleeve M2 stationary mold Z0 center height position of sleeve

Claims (8)

a fixed die plate;
a plunger;
a sleeve that includes a hot water supply port and is held by the fixed die plate in a state in which the plunger is disposed inside and is inserted through the fixed die plate;
At least a part of the hot water supply port is arranged closer to the one surface side than the other surface opposite to the one surface on which the fixed die of the fixed die plate is attached,
In the fixed die plate, a concave portion is arranged at a position corresponding to the hot water supply opening on the upper side of the sleeve so that the hot water supply opening is exposed, and is recessed from the other surface toward the one surface, and the sleeve is provided with a through hole in which the
When viewed from the axial direction of the sleeve, the recess includes a pair of mutually opposed side surfaces whose lower ends are connected to the through hole, and the lower ends of the pair of side surfaces are positioned above the center of the sleeve. A die casting machine configured to be connected to the through hole . 2. The die casting according to claim 1, wherein, in the thickness direction of said fixed die plate, a depth of said recess from said other surface is greater than a distance from said other surface to an end portion of said hot water supply port on said one surface side. machine. The sleeve has a horizontally extending cylindrical shape,
The recess is provided above a height position of the center of the sleeve,
3. The die casting machine according to claim 2, wherein said fixed die plate holds said sleeve over a range larger than a half circumference of said sleeve at a position where said recess is provided in said thickness direction. The die casting machine according to any one of claims 1 to 3, wherein the entire hot water supply port is arranged closer to the one surface than the other surface. 5. The die casting machine according to claim 4, wherein an outer end face of said sleeve provided with an opening for introducing said plunger inside is positioned substantially on the same plane as said other surface. The die casting machine according to any one of claims 1 to 5, wherein the inner surface of said recess is inclined so as to widen toward the opening of said recess on said other surface side. The die casting machine according to any one of claims 1 to 6, wherein said fixed die plate includes a heat insulating member provided so as to avoid said recess and in contact with the outer surface of said sleeve. 8. The die casting machine according to any one of claims 1 to 7, further comprising a lid portion that openably and closably closes the hot water supply port, at least a portion of which is located closer to the one surface than the other surface.

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