JP6344750B2 - Directly connected valve to die cavity - Google Patents

Description

  The present invention relates to a valve directly connected to a cavity portion of a die casting.

  Patent Document 1 is a pressure reducing valve that opens and closes an exhaust passage that continues from an exhaust hole provided in a cavity portion of a mold to the outside, and that forms an exhaust port of the cavity portion and that communicates with the exhaust port and the exhaust passage And a valve body attached to the valve block, capable of closing and opening the exhaust port, and disposed in the cavity portion. In Patent Document 1, the valve element closes the exhaust port immediately before the molten metal is completely filled in the cavity.

  According to the configuration of Patent Document 1, the path for exhausting the gas in the cavity is separated from the region (between the fixed mold and the movable mold) that causes the secondary filling of the molten metal after filling the cavity with the molten metal. Therefore, the volume of the secondary filling portion is reduced accordingly. As a result, the secondary filling time can also be reduced, so that the molten metal filled in the cavity can be sufficiently pressurized, and a die-cast product in which nest formation is suppressed can be manufactured.

JP 2006-61942 A

However, depending on the shape of the cavity, there is a part where gas is difficult to escape.In this case, the part can be identified by specifying the position of the nest in the die-cast product. It is difficult to construct a degassing route.
In view of the above problems, the present invention has an object to provide a direct connection valve to a cavity portion of a die cast capable of constructing a degassing path directly connected to the cavity in a later position at an arbitrary position of the cavity.

In order to achieve the above object, the direct connection valve to the cavity portion of the die casting according to the present invention can be attached to a through hole communicating with the cavity portion formed in the mold, and has a hollow outer shape having an opening at the tip. A cylindrical casing, a valve body which is disposed in the outer cylindrical casing and which can close and open the opening, and the valve body is moved by moving the valve body in a longitudinal direction of the outer cylindrical casing. An actuator that opens and closes the opening, and is attached to a portion of the outer casing exposed from the mold, communicates with the outer casing and communicates gas between the outer casing and the outside. And a gas input / output unit for performing the above.
The cavity portion refers to the cavity itself, or an overflow that leads to the cavity, or a gap provided in the peripheral portion of the cavity such as an air vent or a runner.

  With the above configuration, it is possible to easily attach the outer cylinder casing having the valve body disposed at the tip, by merely forming a through hole communicating with the mold from the outside to the cavity or overflow. Further, the gas input / output section attached to the outer casing can be communicated with the cavity or overflow through the outer casing. Since the through hole can be formed at an arbitrary position and in an arbitrary direction with respect to the cavity or overflow, the gas can be effectively discharged at a portion where the gas is difficult to escape. From the above, it becomes a direct connection valve to the cavity portion where the degassing path directly connected to the cavity can be constructed at an arbitrary position such as a cavity or overflow.

In addition, a vacuum suction means is connected to the gas input / output unit.
With the above configuration, it is possible to manufacture a die-cast product with a high yield by exhausting gas intensively from a portion where gas is difficult to escape in the cavity.

Further, a reactive gas supply means is connected to the gas input / output unit.
With the above-described configuration, a die-cast product can be manufactured with a high yield by the so-called PF method by supplying a reactive gas intensively in a cavity where a convolution is likely to occur.
The gap may be an air vent or a runner. By doing in this way, the influence by a direct connection valve can be brought to places other than a cavity.
In addition to claim 1, an operation valve unit for operating the actuator and / or the gas input / output unit is attached to the outer end of the outer casing to form an integral direct connection valve mechanism, which can be integrally attached to and detached from the mold. It is characterized by. In this way, it is possible to replace individual detachable valves.
A tie rod for connecting the rear end portion of the outer cylinder casing and the casing fixing portion is provided, and the position of the valve inserted into the mold by the adjusting bolt can be adjusted on the tie rod. Thus, an accurate tie rod length can be obtained.
Further, an air source can be connected to the gas input / output section of the outer casing, and purge air can be introduced into the outer casing by switching valves. If it does in this way, a foreign substance can be blown out from an opening part by the effect | action of purge air.

  According to the valve directly connected to the cavity portion of the die casting according to the present invention, the outer casing is provided with the valve body attached to the tip only by forming a through-hole communicating with the mold from the outside to the cavity or overflow. Can be easily attached. Further, the gas input / output section attached to the outer casing can be communicated with the cavity or overflow through the outer casing. Since the through hole can be formed at an arbitrary position and in an arbitrary direction with respect to the cavity or overflow, the gas can be effectively discharged at a portion where the gas is difficult to escape. From the above, it is possible to construct a degassing path directly connected to the cavity portion after installation at an arbitrary position such as a cavity or an overflow.

It is sectional drawing of the cavity direct connection valve | bulb (at the time of closing) of the die-casting of this embodiment. It is sectional drawing of the cavity direct connection valve | bulb (at the time of releasing) of the die-casting of this embodiment. It is a schematic diagram of the die-casting apparatus to which the die-cast cavity direct connection valve of this embodiment was attached. It is a schematic diagram which shows the state before attaching the cavity direct connection valve | bulb of the die-casting of this embodiment in the area | region enclosed with the dashed-dotted line of FIG. It is a figure which shows the structure of the action | operation air valve unit of a direct connection valve | bulb. It is a schematic diagram containing the die-casting apparatus which attached the direct connection valve | bulb which concerns on 2nd Example to the overflow part. It is a front view which shows the detailed assembly of a direct connection valve | bulb. FIG. 7 is a side view of FIG. 6. It is a partial top view of the direct connection valve | bulb shown in FIG. It is the sectional view on the AA line of FIG.

  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .

  FIG. 3 is a schematic diagram of a die casting apparatus in which a direct connection valve is attached to the cavity portion of the die casting of the present embodiment. FIG. 4 is a schematic diagram showing a state before the cavity direct connection valve of the present embodiment is attached in the region surrounded by the one-dot chain line in FIG.

  As shown in FIG. 3, the die casting apparatus 10 (molding apparatus) has a mold 12 including a fixed mold 14 and a movable mold 16. A cavity 18 serving as a mold for die-casting is formed on the mating surface of the fixed mold 14 and the movable mold 16. A gate 24 for introducing the molten metal 22 extruded from the molten metal injection device 20 into the cavity 18 is connected to the cavity 18. The molten metal injection device 20 is connected to a runner 26 of the mold 12 and includes a hollow sleeve 28 and a plunger 30 disposed in the sleeve 28. The molten metal 22 is supplied into the sleeve 28 from a molten metal supply device (not shown), and the molten metal 22 is injected into the cavity 18 through the gate 24 when the plunger 30 is pushed out. The plunger 30 is operated by an injection driving means (not shown).

  A chill vent or air vent 32 connected to the cavity 18 is formed on the mating surface of the fixed mold 14 and the movable mold 16. A small amount of gas in the cavity 18 flows through the chill vent or air vent 32, and the molten metal 22 flows out of the cavity 18 to cool and solidify (secondary filling).

  A direct connection valve (hereinafter referred to as a direct connection valve 50) to the cavity portion is attached to the fixed mold 14 (or the movable mold 16). As shown in FIG. 4, the direct connection valve 50 includes a through hole 34 that penetrates straight from the outside of the fixed mold 14 to the cavity 18, and a screw hole 36 (female screw) that communicates coaxially with the through hole 34. It can be attached by forming.

  The through hole 34 (screwing hole 36) can be formed at an arbitrary angle with respect to an arbitrary position of the cavity 18. Therefore, the direct connection valve 50 can be attached at an arbitrary angle and an arbitrary number with respect to an arbitrary position of the cavity 18.

  1 and 2 are cross-sectional views of the die-cast cavity direct connection valve (when closed and when opened) according to the present embodiment. The direct connection valve 50 is inserted into the through-hole 34, one of the longitudinal directions is exposed to the outside of the fixed mold 14, the other reaches the cavity 18, and a hollow outer casing 52 having an opening 54 at the other end. And a valve body 58 that is disposed in the outer casing 52 and performs an operation capable of closing and opening the opening 54.

  The actuator 62 is attached to one side of the outer casing 52 in the longitudinal direction and moves the valve body 58 (the rod 60 connected to the valve body) in the longitudinal direction to open and close the opening 54 by the valve body 58. And a gas input / output unit 72 that is attached to a portion of the outer cylinder casing 52 exposed to the outside of the stationary mold 14 and communicates with the outer cylinder casing 52.

Here, the attachment structure of the outer cylinder casing 52 to the screw hole 36 of the mold 14 is as follows. A die attachment member 90 is provided to tightly enclose the outer cylinder casing 52, and a screw portion 56 (male screw) is formed at a position facing the screw hole 36 at the tip of the outer peripheral surface. The attachment member 90 can be fixed to the mold 14 by screwing. A knob 52a (for example, a hexagonal shape in a plan view) for manually screwing is also formed on the rear end side of the mold mounting member 90 protruding from the mold 14. Further, a flange-like end face plate 94 is formed at the rear end portion of the outer mold attaching member 90, and a fixing portion 96 of the outer cylinder casing 52 is attached thereto. That is, the casing fixing part 96 has a split structure, and a gap is formed in the facing part. An end face plate mounting portion 97 that encloses the end face plate 94 is formed in a U-shaped groove inside the circumference. The outer casing 52 is in close contact behind the end face plate 94. Here, the split casing fixing portion 96 is tightened with a bolt and the gap between the split casing fixing portions 96 is filled, so that the outer casing is sandwiched so that the outer casing 52 is integrated.
Note that if the outer cylinder casing 52 is fixed with sufficient strength to the fixed mold 14 simply by inserting the outer cylinder casing 52 into the through-hole 34, the screw hole 36 and the screw portion 56 are unnecessary. . The rod 60 is disposed in the outer cylinder casing 52, has substantially the same length as the outer cylinder casing 52, one of the longitudinal directions is connected to the actuator 62, and the other is connected to the valve body 58.

  It is desirable that the front end (opening 54) of the outer cylinder casing 52 facing the cavity 18 is disposed so as to form the same plane as the inner wall of the cavity 18. Similarly, the valve body 58 preferably forms the same plane as the inner wall of the cavity 18 when the opening 54 is closed as shown in FIG. 1, and the cavity 58 is opened when the opening 54 is opened as shown in FIG. Get inside 18 As shown in FIG. 2, in a state where the valve body 58 opens the opening 54, the cavity 18 is opened to the outside via the outer cylinder casing 52 and the gas input / output unit 72.

  By the way, the periphery of the opening 54 at the tip of the outer cylinder casing 52 is not a flat surface, but a part of a conical surface whose diameter decreases toward the rod 60 side with respect to the axial direction of the rod 60 (outer cylinder casing 52) (wedge shape). Is forming. Correspondingly, the valve body 58 has a conical shape (wedge shape) that follows the shape of the conical surface around the opening 54, and when the opening 54 is closed, the side wall of the valve body 58 is located around the opening 54. Make surface contact or line contact.

  For example, as shown in FIGS. 1 and 2, the actuator 62 includes a cylinder 64 that accommodates compressed air (or hydraulic pressure), a piston 66 that is connected to the rod 60 and separates the inside of the cylinder 64 into two spaces, and a cylinder 64. This is constituted by a biasing spring 70 that is mounted on the rod 60 portion and applies a biasing force to the piston 66 (head 68). In the initial state, the actuator 62 pulls back the valve body 58 (rod 60) to the actuator 62 side by the urging force of the urging spring 70, and the valve body 58 closes the opening 54. However, the biasing spring 70 is compressed by supplying compressed air to the space on the head 68 side of the cylinder 64 to move the piston 66 in a direction approaching the fixed mold 14 (FIG. 2), and is closed by the valve body 58. Opening 54 can be opened. Moreover, it returns to the initial state by releasing the compressed air. The actuator 62 may be one using a solenoid, a servo motor, a linear motor, or the like other than the power cylinder type as described above.

  FIG. 6 shows the configuration of the operating valve unit 120. In order to open and close the valve body 58 that opens and closes the opening 54 of the outer casing 52, a valve opening path 122 connected to the head side chamber of the actuator 62 and a valve closing path 124 connected to the rod side chamber are provided. It has been. Flow control valves 123 and 125 are interposed in the paths 122 and 124, respectively. One of these is connected to the air source 126 provided at the customer, and the direction switching valve 128 for switching the other to release the atmosphere is provided in the air path, and the direction switching valve 128 is switched. The valve body 58 determines whether the opening 54 is released or closed.

  In addition, a gas input / output unit 72 is opened in the outer casing 52, and an air purge path 130 is connected thereto. The air purge path 130 is connected to the previous air source 126, and a direction switching valve 132 is provided in the middle thereof. The direction switching valve 132 sets the air purge path 130 as an air source or air release, and is switched by a control unit (not shown). Normally, when the valve body 58 opens the opening 54, the direction switching valve 132 operates so as to connect the air source 126 to the air purge path 130 so that air is blown into the outer casing 52. As a result, the release agent or the like is removed from the inside of the outer casing 52.

  The air purge path 130 is released to the atmosphere by setting it to the atmosphere release side, and it is a vacuum die casting method by connecting to a vacuum source through a vacuum valve, and a PF method by connecting to an oxygen source through an oxygen supply valve. Become.

  Therefore, in the present embodiment, the die-cast molding of the atmospheric release type, the vacuum suction type, and the PF (Pore Free) method (oxygen replacement die casting method) can be performed.

  In the case of the vacuum suction type, a route that outputs a drive signal to the direction switching valve 132 and is released to the atmosphere may be connected to the vacuum tank. In the case of the PF method, a route that is also open to the atmosphere may be connected to an oxygen source. These may be performed by the action of a control unit (not shown).

  After the product is taken out, air purge is blown from the air source 126 into the outer casing 52, so that the molten metal 22 adhered and solidified around the opening 54 is blown off by the compressed air flowing from the compressed air supply source 78. Can do.

  As described above, according to the direct connection valve 50 of this embodiment and the die casting apparatus 10 using the same, it communicates linearly from the outside to the cavity 18 with respect to the fixed mold 14 (movable mold 16). Only by forming the through hole 34, the outer cylinder casing 52 having the valve body 58 disposed at the tip can be easily attached. The gas input / output unit 72 attached to the outer cylinder casing 52 can be communicated with the cavity 18 through the outer cylinder casing 52. And since the through-hole 34 can be formed in the position which becomes arbitrary positions and arbitrary directions with respect to the cavity 18, gas can be discharged | emitted effectively in the part which gas does not escape easily. As described above, a degassing path directly connected to the cavity 18 can be constructed at an arbitrary position of the cavity 18 by retrofitting.

  In addition, by connecting the gas input / output unit 72 to a vacuum tank, it is possible to produce a die-cast product with a high yield by exhausting gas intensively from a portion in the cavity 18 where gas is difficult to escape. Further, by connecting the gas input / output unit 72 to an oxygen supply source, the reaction gas is intensively supplied to the cavity 18 where the entrapment is likely to occur, and a die-cast product is manufactured at a high yield by the so-called PF method. be able to.

Also in this embodiment, a path for exhausting the gas in the cavity 18 (the outer casing 52, the gas input / output unit 72) and a region in which the molten metal 22 is charged after the molten metal 22 is filled (chill vent) Alternatively, since the air vent 32) is separated, the volume of the secondary filling portion is reduced accordingly. As a result, the secondary filling time can also be reduced, so that the molten metal 22 filled in the cavity 18 can be sufficiently pressurized, and a die-cast product in which nest formation is suppressed can be manufactured.
The actuator 62 is attached to the portion exposed from the fixed mold 14 of the outer casing 52 together with the operation valve unit 120. However, depending on the diameter of the outer casing 52, the actuator 62 can be accommodated. In this case, the actuator 62 can be attached to an arbitrary position in the outer casing 52. However, when the actuator 62 and / or the actuating valve unit 120 are integrally attached to the exposed end side of the outer casing 52, when a situation occurs in which the actuator is replaced with one of the directly connected valves 50, the new directly connected valve 50 is It is possible to cope with it simply by exchanging it, and the effect that the exchanging work becomes easy is obtained.

FIG. 5 shows a cross-sectional view of a die-cast direct connection valve (when closed, when opened) according to the second embodiment. The two direct connection valves 50 are respectively inserted into through holes 34 formed in different holes, and one of the longitudinal directions is exposed to the outside of the fixed mold 14 and the other is connected to the cavity 18 and the cavity 18. 19 and a hollow outer casing 52 having an opening 54 at the other end, and a valve body 58 disposed in the outer casing 52 and capable of closing and opening the opening 54. ,have.
In this embodiment, the internal gas can be drawn from the direct connection valve 50 opened to the cavity 18, and at the same time, the internal gas can be drawn from the overflow 19.

  In this embodiment, as described above, die-cast molding can be performed by the atmospheric release type, the vacuum suction type, and the PF (Pore Free) method (oxygen replacement die casting method). Further, since the direct connection valve 50 is opened especially to the cavity 18 and the overflow 19 portion, the time difference suction is possible, and the control such as closing from the order close to the gate 24 is possible. This makes it possible to vent the gas optimally.

  As described above, the direct connection valve 50 is attached to the cavity 18 or the overflow 19, but can be provided in a gap portion connected to the cavity 18 such as an air vent or a runner 26.

  Next, in the above embodiment, the direct connection valve 50 is attached by screwing the screw portion 56 of the outer casing 52 into the screw hole 36 formed in the mold 12. Cannot follow changes in thickness. If the change in thickness can be accommodated, when the molten metal pressure is applied from the cavity 18 side, the outer casing 52 is pulled out by the force transmitted through the valve body 58.

  For example, FIG. 7 shows an example in which the mold 12 can follow the change in thickness, and the outer casing 52 of the direct connection valve 50 is inserted through and screwed into the screw hole 36 of the mold 12. A mold attachment member 90 in which a recessed portion 56 is formed is provided. The mold mounting member 90 is provided with a hexagonal knob 92a (corresponding to the knob 52a) for screwing it into the screw hole 36, and a flange-like end face plate 94 is provided at the rear end. A casing fixing portion 96 is attached to the end face plate 94. The casing fixing part 96 is composed of a half meniscus, which is provided with an attachment part 97 for the end face plate 94 and a clamping part 99 for the outer cylinder casing 52 of the direct connection valve 50 on the inner peripheral surface. By tightening with, the sandwiching portion 99 can grip the outer casing 52. The mounting portion 97 has a groove slightly larger than the diameter of the end face plate, and the clamping portion 99 has a tightening surface that directly contacts the outer peripheral surface of the outer cylinder casing 52. And the clearance gap 95 is provided between both meniscus so that clamping | tightening force may come out (refer FIG. 8, FIG. 10).

  For this reason, when the thickness of the mold 12 changes, the bolt 98 is loosened to open the space between the meniscuses, and the casing fixing portion 96 is separated from the outer casing 52. Then, the mold attachment member 90 is screwed to the new mold 12, the outer casing 52 is inserted into the mold attachment member 90, arranged to an appropriate depth, and a casing fixing portion 96 made of two parts is attached to the bolt. The direct connection valve 50 is fixed by tightening with 98. Thereby, it is possible to follow the change in the thickness of the mold 12 freely.

  However, when the molten metal pressure in the cavity 18 increases, the direct connection valve 50 may fall off because the tightening force between the outer casing 52 and the casing fixing portion 96 cannot withstand the pressure from the cavity 18 side. Therefore, in this embodiment, between the casing fixing portion 96 that holds the outer casing 52 of the direct connection valve 50, and the actuator 62 and the gas input / output portion 72 that are attached to one side of the outer casing 52 in the longitudinal direction. The fixed plate 100 is connected by a tie rod 102.

  7 is a front view showing the direct connection valve 50, FIG. 8 is a side view thereof, FIG. 9 is a partial plan view, and FIG. 10 is a sectional view taken along line AA in FIG. As shown in the figure, an actuator 62 for opening and closing the valve body 58 is attached to the outer end side of the outer casing 52, but the plate 100 is attached to the front end surface (or rear end surface) of the case of the actuator 62. It has been. Although the plate 100 has a constant thickness, the planar shape thereof is basically the same as the case of the actuator 62 as shown in FIG. It can be tightened together with the actuator case. In such a plate 100, rod mounting portions 100a are projected in a triangular shape from both the left and right sides. A cutout portion 106 that reaches the center portion is formed on one side portion (lower side portion) of the plate 100 so that the outer casing 52 that passes through the center portion of the actuator 62 does not get in the way when the plate 100 is mounted. ing.

A pair of tie rods 102 are passed to the target position of the outer casing 52 between the triangular projecting portion 100a of the plate 100 and the casing fixing portion 96 described above. A screw hole is cut in the center of the arcuate portion of the halved casing fixing portion 96, and the screw portion at the end of the tie rod 102 is screwed therein, and the embedded length is determined by the nut 108. On the other hand, on the plate 100 side, a through hole is formed in the triangular projecting portion 100a, and a tie rod 102 is penetrated there, and nuts 110 on both ends of the tie rod 102 are attached. Both tie rods 102 have the same length and are set so that equal force is applied. As a result, even if pressure from the cavity 18 side acts on the direct connection valve 50, this force is transmitted to the plate 100 via the outer casing 52 and the actuator 62, and from the plate 100 via the tie rod 102 to the casing fixing portion 96 and the mold. It passes through the attachment member 90 and is transmitted to the screw hole 36 of the mold 12 through the screw part 56. Therefore, even if the pressure that allows the direct connection valve 50 to escape is transmitted from the outer casing 52, it is finally transmitted to the mold through the plate 100 and the tie rod 102, so that the direct connection valve 50 does not fall off.
In addition, the screw hole on the casing fixing part 96 side is a through screw hole, and the valve position inserted into the mold can be adjusted here.

Therefore, in this embodiment, since the actuator 62 side and the mold mounting member 90 side are connected by the tie rod 102, the direct connection valve 50 can be prevented from falling off due to the pressure of the cavity 10.
The plate 100 acts in the same manner on the front and rear surfaces of the case of the actuator 62 and on the front surface of the gas input / output 72.

  The venting path directly connected to the cavity can be used as a direct connection valve to the cavity part that can be built at any position to the cavity or overflow.

10 ......... Die-casting device, 12 ......... Mold, 14 ......... Fixed die, 16 ...... Moveable die, 18 ......... Cavity, 19 ... Overflow, 20 ...... Molten metal injection device, 22 ... ...... Molten metal, 24 ......... Gate, 26 ......... Runner, 28 ......... Sleeve, 30 ...... Plunger, 32 ......... Chill vent or air vent, 34 ......... Through hole, 36 ......... Screw hole 50 ......... Directly connected valve, 52 ......... Outer cylinder casing, 52a ......... Knob, 54 ......... Opening, 56 ......... Screw, 58 ......... Valve, 60 ......... Rod, 62 ......... Actuator, 64 ... ... Cylinder, 66 ... ... Piston, 68 ... ... Head, 70 ... ... Biasing spring, 72 ... ... Gas input / output part, 90 ... ... Mold mounting member, 92a ... Knob, 94 ... Flange end plate, 95 ... Clearance, 96 …… Casting fixing part (divided in two), 97 …… End face plate mounting part, 98 …… Bolt, 99 …… Pinching part, 100 ……… Plate, 102 ……… Tie rod, 120 …… Operating valve unit .

Claims (9)

A hollow outer casing that can be attached to a cavity formed in a mold or a through-hole communicating with a cavity communicating with the cavity, and has an opening at the tip,
A poppet-type valve element that is disposed in the outer cylinder casing and performs an operation capable of closing and opening the opening, and is driven to enter a cavity or a gap communicating with the cavity when the opening is opened ;
An actuator that opens and closes the opening by the valve body by moving the valve body in a longitudinal direction of the outer casing;
A gas input / output unit that is attached to at least a portion that is exposed from the mold of the outer cylinder casing so as to be connectable to the atmosphere release path, and that can release the inside of the outer cylinder casing to the atmosphere ;
Have
A direct connection valve to the cavity part of the die cast, characterized in that these can be attached to and removed from the mold as a single unit . A hollow outer casing that is inserted into a through-hole penetrating from the outside of the mold to the cavity, one of the longitudinal directions is exposed from the mold and the other reaches the cavity, and has an opening at the other end. When,
A poppet-type valve element that is disposed in the outer cylinder casing and performs an operation capable of closing and opening the opening, and is driven to enter a cavity or a gap communicating with the cavity when the opening is opened ;
An actuator that opens and closes the opening by the valve body by moving the valve body in a longitudinal direction of the outer casing;
A gas input / output unit that is attached to the part exposed from the mold of the outer cylinder casing so as to be connectable to an atmosphere release path, and can release the inside of the outer cylinder casing to the atmosphere ;
Have
A direct connection valve to the cavity part of the die cast, characterized in that these can be attached to and removed from the mold as a single unit . Inserted into a through-hole penetrating from the outside of the mold to the overflow leading to the cavity, one side in the longitudinal direction is exposed from the mold and the other reaches the overflow, and a hollow outside having an opening at the other end A cylinder casing;
A poppet-type valve element that is disposed in the outer cylinder casing and performs an operation capable of closing and opening the opening, and is driven to enter a cavity or a gap communicating with the cavity when the opening is opened ;
An actuator that opens and closes the opening by the valve body by moving the valve body in a longitudinal direction of the outer casing;
A gas input / output unit that is attached to at least a portion that is exposed from the mold of the outer cylinder casing so as to be connectable to the atmosphere release path, and that can release the inside of the outer cylinder casing to the atmosphere ;
Have
A direct connection valve to the cavity part of the die cast, characterized in that these can be attached to and removed from the mold as a single unit .   2. The direct connection valve to the cavity portion of the die casting according to claim 1, wherein a vacuum suction means is connected to the gas input / output portion.   The direct connection valve to the cavity part of the die-casting according to claim 1, wherein a reaction gas supply means is connected to the gas input / output part.   The direct connection valve according to claim 1, wherein the air gap is an air vent or a runner.   An actuating valve unit for actuating the actuator and / or gas input / output unit is attached to the outer end of the outer casing to form an integral direct-coupled valve mechanism, which is detachably attached to the mold. The direct connection valve | bulb to the cavity part of the die-casting of Claim 1.   The tie rod for connecting the rear end portion of the outer cylinder casing and the casing fixing portion is provided, and the position of the valve inserted into the mold by the adjusting bolt can be adjusted to the tie rod. Directly connected to the die casting cavity.   2. The die casting cavity according to claim 1, wherein an air source can be connected to a gas input / output portion of the outer casing, and purge air can be introduced into the outer casing by switching a valve. Direct connection valve.

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