CN115996804A

CN115996804A - Valve device, die and die casting device

Info

Publication number: CN115996804A
Application number: CN202080103619.9A
Authority: CN
Inventors: 森川岩
Original assignee: Dayi Engineering Co ltd
Current assignee: Dayi Engineering Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2023-04-21
Also published as: EP4234122A1; JP7384367B2; WO2022085058A1; JPWO2022085058A1

Abstract

The valve device (30) is connected to a cavity (15) of a die (10) provided in a die casting device (1), and opens and closes a suction passage (60) that is a passage for sucking gas in the cavity (15), wherein the valve device (30) comprises: a valve device main body (40); a valve housing space (41) which is provided in the valve device main body (40), is connected to the suction passage (60), has an opening (44), and is a space including a flange portion housing space (43); a valve (80) which is provided in the valve housing space (41) so as to be movable in the axial direction, and which opens and closes the suction passage (60) by the movement; a flange portion (90) detachably attached to the valve (80) in the flange portion accommodation space (43), and movable together with the valve (80) in the flange portion accommodation space (41); a closing part (70) which can be assembled and disassembled relative to the valve device main body (40) and can close the opening part (44); and a driving part (110) for moving the valve (80) or the flange part (90).

Description

Valve device, die and die casting device

Technical Field

The present invention relates to a valve device, a die, and a die casting device.

Background

The vacuum die casting device is as follows: while sucking the gas in the cavity of the mold by a vacuum apparatus, the molten metal injected into the cylinder is injected by an injection apparatus, and the cavity is filled with the molten metal via a runner or the like, thereby casting the product. Such a vacuum die casting apparatus includes a valve device having a valve for opening and closing a suction passage, which is a passage for sucking gas in a cavity (for example, patent document 1).

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2010-69511

Disclosure of Invention

Problems to be solved by the invention

According to the conventional general valve device 200, the valve 201 may not be operated due to an electrical failure at the time of melt injection. When the valve 201 is not operated, as shown in fig. 10, the suction passage 205 is kept open without being closed by the valve 201, and the melt enters into the valve device 200 to solidify, so that the suction passage 205 is blocked. If the suction passage 205 is blocked, the gas in the cavity of the mold cannot be sucked by the vacuum apparatus.

When the suction passage 205 is clogged with the solidified melt (hereinafter referred to as solidified melt), as shown in fig. 11, the solidified melt S4 is removed from the front surface of the head 202 (valve element) of the valve 201, and then the valve 201 is pushed out backward from the head 202 side using a rod R1 or the like and taken out from the valve device 200. Then, the solidified melt S4 that has clogged the suction passage 205 and the solidified melt S4 that has adhered to the valve 201 are removed.

However, there are the following problems: when the valve 201 is pushed out rearward from the head 202 side by the rod R1 or the like, the head 202 of the valve 201, which is an important part in opening and closing the suction passage 205, and the suction passage 205 provided in the valve device 200 are broken, and then the suction passage 205 cannot be reliably closed by the valve 201 even if the valve device 200 is used.

The invention aims to provide a valve device, a die and a die casting device, which can remove solidified melt without damaging the head part and a suction passage of a valve even if the valve does not work and the solidified melt is blocked in the suction passage.

Means for solving the problems

In one aspect of the present invention, there is provided a valve device connected to a cavity of a die provided in a die casting device and configured to open and close a suction passage, which is a passage for sucking gas in the cavity, the valve device including: a valve device body; a valve accommodation space provided in the valve device main body, connected to the suction passage and having an opening, the valve accommodation space being a space including a flange portion accommodation space; a valve provided in the valve housing space so as to be movable in the axial direction, the valve being movable to open and close the suction passage; a flange part detachably mounted to the valve in the flange part accommodating space, and movable together with the valve in the flange part accommodating space; a closing part which can be assembled and disassembled relative to the valve device main body to close the opening part; and a driving part for moving the valve or the flange part.

In the valve device, the valve may include, in order from the suction passage side, a head portion that opens and closes the suction passage, a first trunk portion that is connected to the head portion, and a second trunk portion that is connected to the first trunk portion. In addition, the second trunk portion may have a smaller cross section than the first trunk portion at a junction portion with the first trunk portion. The flange portion may be interposed between the first trunk portion and the pressing portion that is detachable from the second trunk portion, and may be attached to the second trunk portion.

In the valve device, the second trunk portion may include a groove portion extending in the circumferential direction. The pressing portion may be detachable from the groove portion.

In the valve device, the width of the pressing portion may be smaller than the width of the groove portion in the axial direction of the second trunk portion. In addition, the flange portion may be movable in the groove portion in the axial direction of the second trunk portion, and the flange portion may be movable with respect to the second trunk portion. The difference between the width of the groove portion and the width of the pressing portion, in other words, the gap between the groove portion and the pressing portion in the groove portion is preferably in the range of 0.2mm to 0.4 mm.

In the valve device, the pressing portion may include a substantially annular portion having a discontinuous portion, and the inner surface of the substantially annular portion may be fitted to the bottom surface of the groove portion so as to be elastically deformable so as to expand the inner periphery.

In the valve device, the second trunk portion may include a first tapered portion having a tapered cross section toward the opening portion side on the opening portion side of the groove portion.

In the valve device, the pressing portion may include a second tapered portion having an inner surface that extends in a tapered shape from an inner side toward an outer edge in the axial direction.

The mold according to one embodiment of the present invention includes: the valve device; a cavity; the suction passage is a passage connected to the cavity; and a melt passage connected to the cavity.

The die casting device according to an aspect of the present invention includes: the above-mentioned mould; a vacuum device connected to the suction passage for sucking the gas in the cavity; a cylinder capable of containing a melt therein and connected to the melt passage; and an injection device for injecting the melt into the cavity through the melt passage.

Effects of the invention

According to the valve device, the die, and the die casting device, even if the valve is not operated and the solidified melt is blocked in the suction passage, the solidified melt can be removed without damaging the head portion of the valve and the suction passage.

Drawings

Fig. 1 is a partially cut-away side view showing a die casting apparatus of an embodiment of the present invention.

Fig. 2 is a partial cross-sectional side view showing a valve device of an embodiment of the present invention.

Fig. 3 is an exploded side view of the valve, flange portion, and pressing portion.

Fig. 4 (a) is a front view showing the flange portion, and (B) is a front view showing the pressing portion.

Fig. 5 is a cross-sectional view showing the periphery of the flange portion and the pressing portion in an enlarged manner.

Fig. 6 is a cross-sectional view showing a state in which the pressing portion is inserted into the valve.

Fig. 7 is a partially cross-sectional side view showing a state in which the suction passage is closed with a valve in the valve device.

Fig. 8 is a partially cross-sectional side view showing a state in which the valve is not operated in the valve device.

Fig. 9 is a partially cross-sectional side view showing a case where the solidified melt is removed in the valve device.

Fig. 10 is a partially cross-sectional side view showing a state in which a valve is not operated in a conventional valve device.

Fig. 11 is a partially cross-sectional side view showing a state in which a solidified melt is removed in a conventional valve device.

Detailed Description

Hereinafter, embodiments of the die casting device, the die, and the valve device according to the present invention will be described with reference to the drawings.

As shown in fig. 1, the die casting apparatus 1 includes a die 10, a cylinder 120, an injection apparatus 130, a vacuum apparatus 140, and a control unit 150.

As shown in fig. 1, the mold 10 includes a fixed mold 11, a movable mold 13, and a valve device 30. The fixed mold 11 and the movable mold 13 are formed of a metal such as steel. The movable die 13 is movable in the front-rear direction. The movable die 13 is moved by a movable device, not shown, and is clamped and unclamped with the fixed die 11. A cavity 15 for casting a product is provided between the fixed mold 11 and the movable mold 13. A melt passage 17 is provided between the fixed mold 11 and the movable mold 13, and the melt passage 17 is a passage for feeding the melt M to the cavity 15 and opens into the cavity 15 and the barrel 120.

As shown in fig. 2, the valve device 30 includes a valve device main body 40, a movable side main body 50, a valve 80, a flange portion 90, a pressing portion 100, and a driving portion 110.

The valve device main body 40 is mounted on the upper portion of the stationary mold 11. The movable-side body 50 is attached to an upper portion of the movable die 13, and faces the valve device body 40. The valve device main body 40 and the movable-side main body 50 are formed of a metal such as steel. The movable-side body 50 moves in accordance with the movement of the movable device to the movable die 13, and closes and opens the valve device body 40. The mold 10 and the valve device 30 are provided with a suction passage 60 which is a passage for sucking the gas in the cavity 15. The suction passage 60 is constituted by a first suction passage 61, a second suction passage 63, and a third suction passage 65. The first suction passage 61 is provided between the fixed mold 11 and the movable mold 13 and between the movable-side body 50 and the valve device body 40, and is connected to the cavity 15, and extends upward from the cavity 15. The second suction passage 63 is provided in the valve device body 40, is connected to the first suction passage 61, and extends rearward from the front surface of the valve device body 40. The third suction passage 65 is connected to the second suction passage 63, extends upward from the second suction passage 63, and is connected to a pipe 144 of the vacuum apparatus 140 described later.

The valve device main body 40 includes a valve housing space 41, and one of the valve housing spaces 41 is connected to the suction passage 60, and the other is connected to the opening 44, and is a space including a flange housing space 43.

In the present embodiment, as shown in fig. 2, the valve housing space 41 penetrates the valve device main body 40 in the front-rear direction. The valve accommodation space 41 includes a head accommodation space 42 and a flange accommodation space 43. The head housing space 42 extends rearward from the front surface of the valve device main body 40, and is open at the front end and connected to the first suction passage 61. The section of a part of the head accommodation space 42 overlaps with the second suction passage 63. The flange portion accommodation space 43 extends in the front-rear direction, and the front end is coaxially connected to the rear end of the head accommodation space 42, and the rear end becomes the opening 44. The cross-sections of the head receiving space 42 and the flange receiving space 43 are both circular, and the diameter of the flange receiving space 43 is larger than the diameter of the head receiving space 42. A cylindrical bush 45 covering the side peripheral edge of the head housing space 42 is provided in the valve device main body 40. The valve device body 40 is provided with a closing portion 70 that is detachable from the valve device body 40 and closes the opening 44. The closing portion 70 is provided with a recess 71 so as to prevent the closing portion 70 from interfering with the valve 80 during movement of the valve 80, which will be described later. The closing portion 70 is provided with a closing portion hole 73 extending rearward from the recess 71 and opening to the outside in order to connect the recess 71 to a third supply passage 115 of the driving portion 110 described later.

The valve 80 is provided in the valve housing space 41 so as to be movable in the axial direction, and opens and closes the suction passage 60 by the movement. The valve 80 may include, in order from the suction passage 60 side, a head 81, a first trunk portion 82, and a second trunk portion 83 connected to the first trunk portion 82, the second trunk portion 83 having a smaller cross section than the first trunk portion 82 at a connection portion with the first trunk portion 82, and the flange portion 90 may be attached to the second trunk portion 83 by being sandwiched between the first trunk portion 82 and a pressing portion 100 that is detachable from the second trunk portion 83. The second trunk portion 83 may include a groove portion 84 extending in the circumferential direction.

In the present embodiment, as shown in fig. 2 and 3, the valve 80 includes a head 81, a first trunk 82, a second trunk 83, and an introduction portion 86 in this order from the front toward the rear. The head 81, the first trunk 82, the second trunk 83, and the introduction portion 86 have a circular cross section and a columnar structure.

The head 81 is a portion for opening and closing the suction passage 60, and has a diameter substantially equal to that of the head housing space 42.

The front end of the first trunk 82 is coaxially coupled to the rear end of the head 81. The first trunk portion 82 varies in diameter in the axial direction (front-rear direction) thereof. The diameter of the front portion of the first trunk 82 is smaller than the diameters of the head 81 and the head accommodating space 42. The diameter of the rear portion of the first trunk 82 is substantially the same as the diameters of the head 81 and the head accommodating space 42. In a portion on the rear side of the first trunk 82, an annular groove 87 extending in the circumferential direction is provided on the side circumferential surface thereof. An O-ring is attached to the groove 87 as a sealing member 88 for sealing the gap between the valve 80 and the head housing space 42 (bushing 45).

The front end of the second trunk portion 83 is coaxially coupled to the rear end of the first trunk portion 82. The second trunk portion 83 has a smaller diameter than the rear portion of the first trunk portion 82. In other words, at the joint portion of the first trunk portion 82 and the second trunk portion 83, the cross section of the second trunk portion 83 is smaller than that of the first trunk portion 82. A portion of the side peripheral surface of the second trunk portion 83 to which a flange portion 90 described later is fitted is provided with an annular groove 87 extending in the circumferential direction. An O-ring is attached to the groove 87 as a sealing member 88 for sealing the gap between the second trunk portion 83 and the flange portion 90. The second trunk portion 83 includes an annular groove portion 84 extending in the circumferential direction on a side circumferential surface thereof. The front end of the groove 84 in the axial direction of the valve 80 is located at substantially the same position as the rear end of the flange 90 when the flange 90 described later is attached to the second trunk 83. The second trunk portion 83 may include a first tapered portion 85 having a tapered cross section toward the opening 44 side on the opening 44 side of the groove portion 84. In the present embodiment, the first tapered portion 85 is provided on the rear end side of the second trunk portion 83, and has a diameter that decreases in a tapered manner toward the rear in the axial direction of the valve 80.

The leading end of the introduction portion 86 is coaxially coupled to the trailing end of the first tapered portion 85. The diameter of the introduction portion 86 and the diameter of the rear end of the first tapered portion 85 are equal to or smaller than the diameter of the second trunk portion 83 at the groove portion 84.

The flange portion 90 is detachably attached to the valve 80 in the flange portion accommodation space 43, and is movable together with the valve 80 in the flange portion accommodation space 43. The flange portion 90 may be movable with respect to the second trunk portion 83.

In the present embodiment, as shown in fig. 2 to 5, the flange portion 90 has a cylindrical (disk-like) structure made of a metal such as steel, and a hole 91 having a circular cross section penetrating the shaft is provided. The width of the flange portion 90 is smaller than the length of the flange portion accommodation space 43 in the axial direction (front-rear direction) of the valve 80. The outer diameter of the flange portion 90 is substantially the same as the diameter of the flange portion accommodation space 43. The diameter of the hole 91 of the flange portion 90 is substantially the same as the diameter of the second trunk portion 83. An annular groove 97 extending in the circumferential direction is provided on the side peripheral surface of the flange portion 90. An O-ring is attached to the groove 97 as a sealing member 98 for sealing the gap between the flange portion 90 and the flange portion accommodating space 43.

As shown in fig. 3 and 5, when the flange portion 90 is moved toward the front side of the valve 80 while passing the valve 80 through the hole 91 from the side of the introduction portion 86, the flange portion 90 abuts against the first trunk portion 82. The flange portion 90 is fitted to the second trunk portion 83 (valve 80) by being sandwiched between the first trunk portion 82 and the pressing portion 100. The flange portion 90 attached to the valve 80 is movable in the axial direction of the valve 80 together with the valve 80, and the movement range thereof is limited to the inside of the flange portion accommodation space 43, which is the area surrounded by the valve device main body 40 and the closing portion 70.

The pressing portion 100 is configured to fix the flange portion 90 to the second trunk portion 83, and is detachable from the second trunk portion 83. The pressing portion 100 may be detachable from the groove 84. Further, the pressing portion 100 may be movable in the groove 84 in the axial direction of the second trunk portion 83. The pressing portion 100 may have a substantially annular configuration having the discontinuous portion 102, and may be elastically deformed so that the inner periphery thereof is expanded, and the inner surface thereof may be fitted to the bottom surface of the groove 84. The pressing portion 100 may include a second tapered portion 103 whose inner surface in the axial direction is tapered and extends from the inner side toward the outer edge.

In the present embodiment, as shown in fig. 2 to 6, the pressing portion 100 includes a pressing portion main body 101 and a pair of

grip portions

105, 105. The pressing portion main body 101 has a substantially annular configuration having a discontinuous portion 102. The inner diameter of the pressing portion main body 101 is equal to or smaller than the diameter of the groove portion 84 of the second trunk portion 83. The pressing portion main body 101 has an outer diameter larger than that of the second trunk portion 83. The pressing portion main body 101 is provided with a second tapered portion 103 having an inner surface that spreads in a tapered shape on one end side in the axial direction of the pressing portion main body 101. The second tapered portion 103 has an inner diameter that increases in a tapered manner from the inner side toward one outer edge in the axial direction of the pressing portion main body 101. The inclination of the second taper portion 103 is substantially the same as the inclination of the first taper portion 85. Each grip 105 is connected to the outer periphery of the pressing unit body 101 near the end of the discontinuous portion 102 with a gap equal to the width of the discontinuous portion 102 in the vicinity of the end of the discontinuous portion 102 of the pressing unit body 101. Each grip portion 105 is provided with a through hole 106 penetrating in the axial direction of the pressing portion 100. The pressing portion 100 is made of a metal such as steel, preferably stainless steel or another metal that is not easily rusted. The pressing portion 100 can be elastically deformed so as to expand the inner periphery, in other words, the inner diameter or the discontinuous portion 102. As shown in fig. 5, the width (thickness) of the pressing portion 100 is narrower than the width of the groove portion 84 of the second trunk portion 83.

As shown in fig. 3, 5 and 6, the valve 80 is passed through the inside of the pressing portion main body 101 from the side of the introduction portion 86 while elastically deforming the pressing portion 100, and the pressing portion 100 is moved forward with respect to the valve 80, and the pressing portion 100 and the first trunk portion 82 sandwich the flange portion 90 and fit to the bottom surface of the groove portion 84 of the second trunk portion 83, whereby the pressing portion 100 is fitted to the second trunk portion 83. The pressing portion 100 fitted in the groove 84 tightens the second trunk 83. As shown in fig. 5, a gap 89 is provided between the pressing portion 100 attached to the second trunk portion 83 and the rear end portion of the groove portion 84 in the groove portion 84 of the second trunk portion 83. When the pressing portion 100 receives an external force equal to or greater than a predetermined force in the axial direction of the valve 80 (the second main portion 83), the gap 89 in the groove portion 84 moves in this direction. Further, since a space is formed between the flange portion 90 and the pressing portion 100 by the movement of the pressing portion 100, the flange portion 90 can move relative to the second trunk portion 83 in the axial direction of the valve 80. The gap 89 between the pressing portion 100 and the groove portion 84, in other words, the difference between the width of the groove portion 84 and the width of the pressing portion 100 is preferably in the range of 0.2mm to 0.4 mm. The pressing portion 100 attached to the second trunk portion 83 is detachable from the second trunk portion 83 by expanding the inner periphery to break or by removing the inner periphery from the valve 80 without breaking. The flange portion 90 can be detached from the valve 80 by detaching the pressing portion 100 from the second trunk portion 83.

The driving portion 110 is used to move the valve 80 or the flange portion 90. The driving unit 110 may be configured to supply compressed air to one side and the other side of the flange 90 in the flange accommodating space 43.

In the present embodiment, as shown in fig. 2, the driving unit 110 includes a driving source 111, a first supply path 113, a second supply path 114, a third supply path 115, a first valve 117, and a second valve 118. The driving source 111 is a compressor that supplies air. One end of a first supply path 113 serving as a supply path for air is connected to the drive source 111. The other end of the first supply path 113 is connected to a first valve 117. One end of the second supply path 114 and one end of the third supply path 115, which are air supply and discharge paths, are connected to the first valve 117, respectively. The other end of the second supply path 114 is connected to a region of the flange portion accommodation space 43 on one side (front side) with the flange portion 90 being defined. In addition, a second valve 118 is provided near the flange portion accommodation space 43 in the second supply path 114. The other end of the third supply passage 115 is connected to the closing portion hole 73 of the closing portion 70, and is connected to the region of the flange portion accommodation space 43 on the other side (rear side) with the flange portion 90 being defined by the closing portion 70. The first valve 117 is a valve capable of switching the connection between the first supply path 113 and the second supply path 114 or the third supply path 115. Here, a solenoid valve is used as the first valve 117. The second valve 118 opens and closes the second supply path 114. Here, a solenoid valve is used as the second valve 118.

When the suction passage 60 is closed by the valve 80, the first supply passage 113 and the second supply passage 114 are connected by the first valve 117, and the third supply passage 115 is opened to the atmosphere. Next, in a state where the second valve 118 is closed, air is supplied to the second valve 118 by the driving source 111 in advance. At this time, the pressure of the air is set to a value at which the pressing portion 100 moves with respect to the groove portion 84, the flange portion 90 moves with respect to the second trunk portion 83, and the valve 80 also moves at the end of their movement. Then, when the second valve 118 is opened at the timing of closing the suction passage 60, air is supplied to the region on one side (front side) of the flange portion accommodating space 43, and the flange portion 90 is pressed by the air. When the flange portion 90 is pushed by air, the pressing portion 100 retreats within the groove portion 84 of the second trunk portion 83, and the flange portion 90 retreats with respect to the second trunk portion 83, and when the pressing portion 100 abuts against the rear end portion of the groove portion 84, the valve 80 retreats, and as shown in fig. 7, the suction passage 60 (the head accommodating space 42, the second suction passage 63) is closed by the head portion 81 of the valve 80. When air is supplied to the flange portion accommodating space 43, the supplied air is discharged to the atmosphere from the third supply path 115.

When the suction passage 60 is opened by the valve 80, the first supply passage 113 and the third supply passage 115 are connected by the first valve 117, and the second supply passage 114 is opened to the atmosphere. Next, when air is supplied to the region on the other side (rear side) of the flange portion accommodation space 43 by the driving source 111, the flange portion 90 and the pressing portion 100 are pushed by the air and advance, and when the flange portion 90 abuts against the first main portion 82, the valve 80 also advances, and as shown in fig. 2, the head 81 of the valve 80 moves toward the first suction passage 61 and the suction passage 60 (head accommodation space 42) is opened. At this time, the air supplied to the flange portion accommodating space 43 is discharged from the second supply path 114 to the atmosphere. The pressure of the air is such that the pressing portion 100 moves relative to the groove portion 84 and the flange portion 90 moves relative to the second trunk portion 83.

The driving unit 110 may be an actuator such as a cylinder device that moves the flange portion 90.

Returning to the explanation of the structure of the die casting apparatus 1, the cylinder 120 can house the melt M therein. The cylinder 120 has a cylindrical structure and is made of metal such as steel. The cylinder 120 is attached to the mold 10 at one end side in a state where the axis is parallel to the horizontal direction (for example, the front-rear direction). The cartridge 120 is provided with an opening penetrating the inside and outside, i.e., a filling port 122. The melt M is injected into the barrel 120 through the injection port 122.

The injection device 130 is a device for injecting the melt M in the cylinder 120 into the cavity 15 of the mold 10. The injection device 130 includes a head 132, a rod 134, and an injection driving unit 136. The head 132 is a generally cylindrical structure. A front end of a rod 134 is coupled to a rear surface of the head 132, and the rod 134 is advanced and retracted by an injection driving unit 136, so that the head 132 advances and retreats in the cartridge 120. The head 132 is moved toward the mold 10 by the injection device 130, and the molten metal M injected into the cylinder 120 is filled into the cavity 15 through the molten metal passage 17.

The vacuum device 140 is used to draw gas into the cavity 15 of the mold 10. The vacuum apparatus 140 includes a vacuum driving unit 142 and a pipe 144. The vacuum driving unit 142 is connected to one end of a pipe 144. The other end of the pipe 144 is connected to the third suction passage 65. The vacuum driving unit 142 sucks the gas in the cavity 15 through the pipe 144 and the suction passage 60. A valve, not shown, is provided in the pipe 144, and the pipe 144 can be opened and closed.

The control unit 150 controls the operation of each structure of the die casting device 1. In the present embodiment, the control unit 150 is configured by a computer including a CPU, a memory, and other storage devices. The control unit 150 is electrically connected to the injection device 130 (injection driving unit 136), the movable device, the driving unit 110 (driving source 111, first valve 117, second valve 118), and the vacuum device 140 (vacuum driving unit 142, valve). The control unit 150 controls the operations of the above-described respective configurations by using a program provided in the control unit 150, control information input from an input unit of the control unit 150, and the like.

The injection of the melt M into the cavity 15 and the suction of the gas from the cavity 15 by the vacuum device 140 in the die casting device 1 are similar to those in the conventional die casting device 1. The valve 80 of the valve device 30 is opened and closed as described above, and the timing of opening and closing the valve 80 is the same as that of the conventional die casting device 1.

When the valve 80 is normally operated during injection of the melt M into the cavity 15 by the die casting device 1, as shown in fig. 7, the valve 80 closes the suction passage 60 at a predetermined timing. At this time, the melt M flows to the front surface of the head 81 of the valve 80 through the supply passage and solidifies. The solidified melt S1 solidified at the front surface of the head 81 of the valve 80 is connected to the product cast in the cavity 15, and after the valve device body 40 and the movable-side body 50 are opened together with the mold 10, the solidified melt S is taken out of the mold 10 together with the cast product.

On the other hand, as shown in fig. 8, when the valve 80 is not operated because the driving portion 110 such as the first valve 117 does not function due to an electrical failure or the like during injection of the melt M into the cavity 15 in the die casting device 1, the melt M flows into the head accommodating space 42 and the suction passage 60 of the valve device body 40 to solidify, and thereby the head accommodating space 42 and the suction passage 60 of the valve device body 40 are blocked.

In this case, the solidified melt is removed, and the valve device body 40 and the movable-side body 50 are first opened together with the mold 10, and the closing portion 70 is detached from the valve device body 40. Next, the solidified melt S1 solidified in the suction passage 60 and adhering to the front surface of the head 81 of the valve 80 is removed by using a cutting device or a heating device. Next, the pressing portion 100 is detached from the groove portion 84 of the second trunk portion 83 from the opening portion 44. Next, as shown in fig. 9, the rod R that can pass through the hole 91 of the flange portion 90 and the head accommodation space 42 is abutted against the rear end of the valve 80 from the opening portion 44 side, and the valve 80 is pushed forward and removed from the valve device main body 40. The solidified melt S2 adhering to the side peripheral surface of the portion of the disassembled valve 80 on the front side of the first trunk portion 82 is removed by using a heating device or the like. The solidified melt S3 that has clogged the suction passage 60 of the valve device main body 40 is removed by using a drill D or the like. With the above, the removal of the solidified melt in the case where the valve 80 is not operated is completed.

To reuse the valve device 30, the detached valve 80 is returned to the housing space of the valve device body 40, the flange portion 90 is attached to the valve 80 by the pressing portion 100, and the closing portion 70 is attached to the valve device body 40 as described above.

According to the valve device 30, the die 10, and the die casting device 1 of the present invention, even if the valve 80 of the valve device 30 does not operate and the solidified melt is clogged in the suction passage 60 during injection of the melt M, the solidified melt clogged in the suction passage 60 can be removed without damaging the head 81 of the valve 80 and the suction passage 60 (the valve device main body 40).

According to the valve device 30, the die 10, and the die casting device 1 of the present invention, by providing the pressing portion 100 that is detachable from the second trunk portion 83 of the valve 80 and that fixes the flange portion 90 to the valve 80, the flange portion 90 can be easily detached from the valve 80. Further, by providing the groove 84 in the second trunk portion 83 of the valve 80 and fitting the pressing portion 100 to the groove 84, the flange portion 90 can be prevented from being detached from the valve 80. Further, since the pressing portion 100 has a substantially annular structure having the discontinuous portion 102 and is elastically deformable so as to expand the inner periphery, the flange portion 90 can be more reliably prevented from being separated from the valve 80.

In addition, according to the valve device 30, the die 10, and the die casting device 1 of the present invention, since the second trunk portion 83 of the valve 80 is provided with the first taper portion 85, the pressing portion 100 can be inserted along the first taper portion 85 when the pressing portion 100 is inserted from the rear end of the valve 80 to be assembled to the second trunk portion 83 or the groove portion 84, and therefore the pressing portion 100 can be smoothly inserted, and the assembly to the second trunk portion 83 or the groove portion 84 can be made easier.

In addition, according to the valve device 30, the die 10, and the die casting device 1 of the present invention, since the pressing portion 100 includes the second tapered portion 103, when the pressing portion 100 is inserted from the rear end of the valve 80 and is assembled to the second stem 83 or the groove 84, the second tapered portion 103 can be inserted along the first tapered portion 85, so that the pressing portion 100 can be inserted more smoothly, and the assembly to the second stem 83 or the groove 84 can be made easier. Further, when the second tapered portion 103 is inserted along the first tapered portion 85, the inner periphery of the pressing portion 100 gradually expands by elastic deformation, so that plastic deformation (breakage) of the pressing portion 100 at the time of assembling to the second trunk portion 83 or the groove portion 84 can be prevented.

According to the valve device 30, the die 10, and the die casting device 1 of the present invention, the width of the pressing portion 100 is narrower than the width of the groove portion 84, the gap 89 is provided between the groove portion 84 and the pressing portion 100 in the axial direction of the second trunk portion 83, and the flange portion 90 and the pressing portion 100 can move relative to the second trunk portion 83 in the axial direction of the second trunk portion 83, whereby when the flange portion 90 is moved by the driving portion 110, the pressing portion 100 and the flange portion 90 move before the valve 80, and therefore the starting resistance of the flange portion 90 becomes smaller, the time from the state where the valve 80 is opened relative to the suction passage 60 to the state where the valve 80 is closed becomes shorter, and the suction passage 60 can be closed more quickly by the valve 80. Further, when the gap 89 between the groove 84 and the pressing portion 100 is set to a range of 0.2mm to 0.4mm, the time from the state where the valve 80 is opened with respect to the suction passage 60 to the state where the valve 80 is closed can be shortened by 10% to 15%, and the suction passage 60 can be closed more quickly by the valve 80.

According to the valve device 30, the die 10, and the die casting device 1 of the present invention, since the second valve 118 is provided near the flange portion accommodation space 43 in the second supply passage 114, the air is supplied to the second valve 118 by the drive source 111 in advance in a state where the second valve 118 is closed, and the second valve 118 is opened at the timing of closing the valve 80, the flange portion 90 and the valve 80 move and the valve 80 closes the suction passage 60, and therefore, the time from the state where the valve 80 is opened with respect to the suction passage 60 to the time when the valve 80 closes becomes short, and therefore, the suction passage 60 can be further rapidly closed by the valve 80.

As described above, since the valve device 30, the die 10, and the die casting device 1 can close the suction passage 60 more quickly by the valve 80, the suction of the gas by the vacuum device 140 can be performed immediately before the melt M reaches the valve 80, and the entrainment of the gas into the melt M can be further reduced, and the quality of the product formed in the cavity 15 can be further improved.

The present invention is not particularly limited to the above-described embodiments, and various configurations and the like can be appropriately changed within the scope of the gist of the present invention.

Description of the reference numerals

1 die casting device

10 mould

11 stent

13 Movable mould

15 die cavity

17 melt passage

30 valve device

40 valve device body

41 valve accommodation space

42 head accommodation space

43 flange portion accommodation space

44 opening part

45 bushing

50 movable side body

60 suction passage

61 first suction passage

63 second suction passage

65 third suction passage

70 closure portion

71 concave portion

73 closing part hole

80 valve

81 head

82 first trunk portion

83 second trunk portion

84 groove portions

85 first cone

86 introduction portion

87 groove

88 sealing member

89 gap

90 flange portion

91 holes

97 groove

98 sealing member

100 pressing part

101 pressing part body

102 discontinuity portion

103 second taper

105 holding part

106 through hole

110 driving part

111 driving source

113 first supply path

114 second supply path

115 third supply path

117 first valve

118 second valve

120 feed cylinder

122 liquid filling port

130 injection device

132 head

134 bar

136 injection driving part

140 vacuum device

142 vacuum driving part

144 tubing

150 control part

D drill bit device

M melt

S1, S2 and S3 solidification solution

R rod

Claims

1. A valve device connected to a cavity of a die provided in a die casting device, for opening and closing a suction passage, which is a passage for sucking gas in the cavity, the valve device comprising:

a valve device body;

a valve accommodation space provided in the valve device main body, connected to the suction passage, having an opening, and including a flange accommodation space;

a valve provided in the valve housing space so as to be movable in the axial direction, the valve being movable to open and close the suction passage;

a flange portion detachably attached to the valve in the flange portion accommodation space, and movable together with the valve in the flange portion accommodation space;

a closing portion which is detachable from the valve device main body and closes the opening portion; a kind of electronic device with high-pressure air-conditioning system

And a driving part for moving the valve or the flange part.

2. The valve device according to claim 1, wherein,

the valve comprises a head part for opening and closing the suction passage, a first main part connected with the head part and a second main part connected with the first main part in sequence from the suction passage side,

the second stem portion has a smaller cross-section than the first stem portion at a junction with the first stem portion,

the flange portion is sandwiched between the first trunk portion and a pressing portion that is detachable from the second trunk portion, and is attached to the second trunk portion.

3. The valve device according to claim 2, wherein,

the second trunk portion has a groove portion extending in a circumferential direction,

the pressing portion is detachable from the groove portion.

4. A valve device according to claim 3, wherein,

the pressing portion has a width narrower than the width of the groove portion,

the pressing portion is movable in the groove portion in an axial direction of the second trunk portion, and the flange portion is movable with respect to the second trunk portion.

5. A valve device according to claim 3 or 4, wherein,

the pressing portion includes a substantially annular portion having a discontinuous portion, and is elastically deformable so as to expand an inner periphery, and an inner surface of the substantially annular portion is fitted to a bottom surface of the groove portion.

6. A mold is provided with:

the valve device of any one of claims 1 to 5;

the cavity;

the suction passage is a passage connected to the cavity; a kind of electronic device with high-pressure air-conditioning system

The melt passage is a passage connected to the cavity.

7. A die casting device is provided with:

the mold of claim 6;

a vacuum device connected to the suction passage for sucking the gas in the cavity;

a cylinder capable of containing a melt therein and connected to the melt passage; a kind of electronic device with high-pressure air-conditioning system

And an injection device for injecting the melt into the cavity through the melt passage.