JPS6147632B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pouring device for casting, for example, an insulator cap.

As shown in Japanese Patent Publication No. 52-11937, a conventional pouring device includes a front plate and an arcuate back plate between the fan-shaped side plates on both sides to form the ladle body, and a ladle on the top of the front plate. There is one in which a ladle provided with a pouring spout is supported so as to be tiltable about a tilting support shaft provided at the fan-shaped center of the fan-shaped side plates on both sides. In this type of fan-shaped ladle, JP-A-53-
As shown in Japanese Patent No. 144428, there is a type having two pouring ports.

However, the opening area of the pouring hole is likely to change due to adhesion of molten metal, and the flow rate balance of the pouring metal flowing out from the two pouring holes is likely to be lost.

An object of the present invention is to make it possible to easily adjust the balance of the flow rate of molten metal poured from the two pouring ports of this fan-shaped ladle.

Next, one embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1, along the mold transfer device 1, a core retracting section 2, a pouring section 3, a folding section 4, a sprue bar folding section 5, a first cleaning section 6, a second cleaning section, etc. A dry blowing section 7, a dry blowing section 8, a coating mold section 9 and a cooling section 11 are provided in this order.

In the core holding section 2, the socket core 13 and the cementing core 14 are inserted into the mold 12, as shown in FIGS. 2 and 3, and in the pouring section 3, the Molten metal is poured into the sprue 15 of the cementing core 14, and this molten metal is
It passes through the weir 16 at the bottom of the sprue 15, passes through the thin wall portion 17, enters the connecting portion 18, passes through the skirt portion 19, passes through the weir 21, reaches the riser 22, and furthermore, the concave portion 23 on the upper surface of the cementing core 14. It overflows. In addition, in the frying and folding section 4, the cooled and solidified frying feeder 22 is broken off from the dam 21,
Further, in the sprue rod folding section 5, the sprue rod 24 inside the sprue 15, which has been cooled and solidified, is broken off from the weir port 16, and before that, in the first cleaning section 6, the cores 13, 14 and the castings are taken out. Empty mold 1
Clean the inside of 2 with a wire brush, and
In the cleaning section 7, the inside of the mold 12 is further cleaned with sandplast, and in the dry blowing section 8,
Cleaning sand is removed by blowing air into the inside of the mold 12, and the mold coating section 9 applies a coating material to the inside of the mold 12. Cool down to a predetermined temperature. Note that the cooling is facilitated by the fins 25 provided on the outer surface of the mold 12.

Furthermore, the skirt portion 1 of the casting is taken out from the mold 12 at the position where the mold transfer device 1 rotates downward.
The waste material 26 on the outer periphery of the opening end of 9 is removed in a tapered shape by cutting to complete the insulator cap 27 shown in FIG. 28 is porcelain, and 29 is a pin that fits into the connecting portion 18 on the other side. Note that a through hole 31 is bored in the lower part of the socket core 13 to the outside, and gas is vented and the contents of the mold 12 are ejected through this through hole 31.

Now, in the above-mentioned pouring section 3, as shown in FIGS. 5 to 7, a column-shaped fixed frame 32 is installed upright, and a rotating frame is attached to the upper end side surface and the lower end side surface of this fixed frame 32. a bearing 36 that rotatably fits and supports the upper end shaft 34 and the lower end shaft 35 of 33;
37, and a thrust bearing 38 for supporting the vertical load of the lower end shaft 35 and its support portion 39 are provided on the side surface of the lower end.

In addition, the lower end portion of the rotating frame 33 and the lower end shaft 3
A lower rotating arm 41 is interposed between the lower rotating arm 41 and support members 42 and 4.
3, 44, 45, 46, 47, and 48 are fixed.
The support members 42 and 43 stand perpendicularly from the rotating arm 14, and the support members 44, 45 and 46 are fixed to the upper ends of the support members 42 and 43 in a U-shaped front opening. The support member 47 is erected in front of the support member 47, and the support member 48 is fixed to the upper end of the support member 47.
A cylinder support frame 49 is fixed to 6, and support members 51, 52, which are fixed to the support members 48, 49,
53 are provided on the sides of the support members 46, 47, 48 at parallel intervals.

Support members 54, 55, 56, which are detachably supported by the support members 44, 45, 48,
57 and 58 are provided integrally. The support member 54 is supported on the support member 44, and the support member 54 is supported on the support member 44.
6, 57, and 58 are supported at one end by the support member 45 and at the other end by the support member 48 via a support plate 59. One end of the support plate 59 is fixed to the support member 58, and the lower surface of the other end of the support plate 59 is provided with the support member 4.
A positioning pin 61 that fits into a small hole on the top 8 is provided in a protruding manner.

In addition, the upper end portion of the rotating frame 33 and the upper end shaft 3
An upper rotating arm 62 is interposed between the upper rotating arm 62, a reducer support frame 63 is fixed to the lower surface of the upper rotating arm 62, and a cyclo reducer 64 is fixed to this support frame 63. 64 output screw shaft 65
The upper part 67 of the support frame 66 is screwed onto the support frame 6.
A support member 71 is attached to the lower part 68 of 6 via a support plate 69.
Attach. One end of the support plate 69 is fixed to the support member 71, and a positioning pin 72 that is fitted into a small hole in the lower part 68 of the support frame 66 projects from the lower surface of the other end of the support plate 69. .

Further, bearings 7 are provided on the lower surfaces of the support members 58 and 71.
3 and 74 are fixed to each other, and this bearing 7
3, 74 are tilting support shafts 76, 77 on both sides of the ladle 75.
Insert. The bearings 73 and 74 are spherically fitted to the fixed outer frame, and the tilting of the tilting shafts 76 and 77 is allowed by the rotation of the bearings relative to the fixed outer frame. It is something to do. Further, so that the tilting shafts 76, 77 can be tilted only in the vertical direction, guide plates 78, 79 having elongated holes in the vertical direction are inserted into the support members 5 on both sides.
8, 71, and guide plates 7 on both sides thereof.
Tilting shafts 7 on both sides are installed in the long holes in the vertical direction of 8 and 79.
6 and 77 are fitted.

In addition, the ladle 75 has a front plate 82 and an arcuate back plate 83 between the fan-shaped side plates 81 on both sides to form a ladle body 84, and the upper part of the front plate 82 accommodates two molds. Two pouring ports 85,
86, and the tilting support shafts 76, 77 extend from the fan-shaped center of the fan-shaped side plates 81 on both sides.
to protrude.

An angle 87 is fixed to the upper end of the arc-shaped back plate 83, and the lower surface of the angle 87 is engaged with the upper surface of the support member 55, so that the ladle 75 is centered about the support shafts 76, 77. This prevents it from rotating downward under its own weight.

Further, bearings 8 are provided on the lower surfaces of the support members 48 and 53.
8 and 89 are fixed to each other, and a rotation support shaft 91 supported by the bearings 88 and 89 rotatably supports a fan-shaped drive plate 92 as a member to which the ladle 75 is removably engaged. Note that the rotation support shaft 91 is arranged concentrically with the tilt support shafts 76 and 77 on both sides. Further, a locking plate 93 is fixed to the upper part of the side surface of the ladle of the fan-shaped drive plate 92, and a locking rod 94 is protruded from the upper part of one of the fan-shaped side plates 81 of the ladle body 84 above the locking plate 93. and the locking plate 93 and the locking rod 94 are engaged.

Further, a pair of bearings 95 is fixed to the upper end of the cylinder support frame 49, and a support shaft 9 is provided between the pair of bearings 95.
6, a sprocket wheel 97 is rotatably installed, and one end of a chain 99, which is a linear member that tilts while pulling the ladle 75, is attached to the mounting portion 98 at the lower end of the fan-shaped drive plate 92. The chain 99 is connected to the arcuate circumferential surface 101 of the fan-shaped drive plate 92 which is concentric with the arcuate back plate 83 of the ladle 75.
The chain 99 is stretched upward along the sprocket foil 97, and the other end of the chain 99 is suspended downward, and the fluid is connected to the other end of the chain 99 via a connector 102 that can be expanded and contracted. A cylinder body 104 of a hydraulic cylinder device 103 as a pressure cylinder device is connected, and this cylinder body 10
The open end of the piston rod 4 is directed downward, and the tip of the piston rod 105 of the hydraulic cylinder device 103 is pivoted to the lower end of the cylinder support frame 49.

In addition, in FIG. 5, the cylinder support frame 4 is
9 and the hydraulic cylinder device 103 are omitted from illustration.

Next, the operation of this embodiment will be explained.

First, ladle 7 of various sizes depending on the size of the mold.
5 and install it before starting work. Note that this ladle 75 is attached to the support members 54, 5 in advance.
5, 56, 57, 58, 71, and this supporting member 54, 55, 56, 57, 5
8, 71 hanging parts 106, 107, 108, 10
9 with a wire or the like, attach this supporting member together.

When the mold 12 as shown in FIGS. 2 and 3 is positioned in front of the ladle 75 and stopped, this is detected by a limit switch or the like, and the hydraulic power source circuit of the hydraulic cylinder device 103 is detected. The solenoid valve or the like is operated to supply pressure oil to the lower part of the cylinder body 104, and the cylinder body 10
4 is lowered, and the fan-shaped drive plate 9 is moved through the chain 99.
2 is rotated upward about the support shaft 91, and the ladle body 84, which is engaged with the locking plate 93 of the fan-shaped drive plate 92 via the locking rod 94, is rotated upward about the tilting support shafts 76 and 77. and pours the molten metal in the ladle main body 84 from the two pouring ports 85 and 86 into the sprues 15 of the two corresponding molds 12 in front of it. Further, pressure oil is supplied to the upper part of the cylinder body 104 to rotate the ladle body 84 downward.

At this time, as shown in FIG. 8, the pouring flow rate is increased at _t1 until the sprue 15 is filled with molten metal, and then the molten metal flows from the sprue 15 to the thin wall portion 17, the connection portion 18, and the skirt portion 19. is throttled at the weir 16, and according to the throttling resistance, the molten metal is kept at a relatively low and constant rate until the molten metal becomes a riser ₂₂ and overflows to the outside, and when it overflows, the molten metal is poured. Stop.

The flow rate of the poured molten metal is adjusted by expanding and contracting the hydraulic cylinder device 103. i.e. time t ₁
In the range of time t2, the cylinder body 104 is rapidly lowered and then slightly raised again, and in the range of time _t2 , the cylinder body 104 is lowered relatively slowly at a constant speed, and finally returned to the upper position rapidly. let Note that the above cylinder body 10
4 is lowered at a constant speed, the ladle 75 rotates upward at a constant speed, and since the ladle 75 has an arc shape centered on the support shafts 76 and 77, a constant flow rate of molten metal can be obtained. .

The expansion and contraction of the hydraulic cylinder device 103 is controlled by a hydraulic control circuit formed by combining various switching valves, throttle resistors, and the like.

Also, the two molds 12 are simultaneously poured using the two pouring ports 85 and 86 of the ladle 75, but if the capacities of the two molds 12 are equal, the two pouring ports 8
The molten metal should flow out equally from the two molds 5 and 86, and if the capacities of the two molds 12 have a certain ratio, the molten metal should flow out from the two pouring ports 85 and 86 at a certain ratio. . However, the opening areas of the pouring ports 85 and 86 tend to change depending on the mass of the molten metal, and the balance of the left and right pouring flow rates tends to be lost.

Therefore, for example, if the opening area of the right pouring port 86 is narrowed, the corresponding right mold 12
The timing when the riser 22 of the core 14 overflows into the recess 23 on the upper surface of the core 14 and the mold 12 on the left side
There is a difference between the timing when the riser 22 of the core 14 overflows into the recess 23 on the upper surface of the core 14,
Since the speed on the right side is slower than on the left side, if you set a non-contact temperature measuring device such as a radiation thermometer with the standard facing the recess 23 of the left and right cores 14, this temperature measuring device First, open the recess 23 on the left side.
The molten metal in the recess 23 on the right side is sensed, and the molten metal in the right recess 23 is then sensed, and the order and time interval of this left and right sensing are electrically compared and
The output screw shaft 65 of the reducer 64 is moved to the support frame 6.
6 rotates upward, and the tilting support shaft 77 on the left side of the ladle 75, which is attached to the support frame 66 via the support plate 69, is placed in a state in which the desired flow rate of molten metal is poured from the left and right pouring ports 85, 86. As mentioned above, the molten metal flows out equally from the two pouring ports 85 and 86, or at a constant ratio.

For example, if the opening area of the left pouring spout 85 is narrowed, the cyclo reducer 64 is reversely driven for a predetermined period of time to lower the left tilting support shaft 77 of the ladle 75.

In addition, the ladle 75 is supported by the supporting members 54, 55, 5.
6, 57, 58, 71, or when emptying the molten metal inside the ladle 75, move the rotating frame 33 and the rotating arm 41 integrated therewith with the shafts 34, 35. The above operation is performed by rotating in a direction away from the mold transfer device 1 as a fulcrum.

In addition, in FIG. 6, 111 is a funnel used when pouring metal.

Further, in this embodiment, in order to make the ladle 75 detachable, a fan-shaped drive plate 92 is interposed between the ladle 75 and the chain 99 as a linear member, but the ladle 75 is not made detachable. If the chain 99 is left attached, attach the lower end of the chain 99 to the ladle 75.
It may be directly connected to the lower end of the arc-shaped back plate 83 and arranged in an arc along the arc-shaped back side of the arc-shaped back plate 83.

Although a metal mold 12 is shown as an example, such a mold may be a sand mold.

In addition to the chain 99, a wire or the like may be used as the filament member.

In addition to the screw shaft 65, a fluid pressure cylinder device, a wire winding and rewinding device using a motor, etc. may be used as means for vertically moving the tilting shafts 76, 77 of the ladle 75.

According to the present invention, a ladle is formed by providing a front side plate and an arc-shaped back side plate between the fan-shaped side plates on both sides to form a ladle body, and providing a pouring spout in the upper part of the front side plate. In a pouring device that is tiltably supported around a tilting support shaft provided at the fan-shaped center of the side plate, two pouring ports are provided on the front side plate of the ladle body, and only one tilting support shaft is connected to the other at a certain level. Since it is provided so that it can be moved up and down using the tilting shaft as a fulcrum, the opening area of the two pouring holes changes due to adhesion of molten metal, etc., and the pouring metal flows out from these two pouring holes. Even if the flow rate balance is disrupted, the balance of the flow rates from the two pouring ports can be easily adjusted by simply adjusting the vertical movement of one of the tilting spindles, and this can be controlled only by one of the tilting spindles. It can be easily done from

[Brief explanation of the drawing]

The figures relate to the present invention: Figure 1 is a schematic diagram of the mold transfer device, Figure 2 is a partially cutaway front view of the mold, Figure 3 is a plan view of the mold, and Figure 4 is the finished product. 5 is a front view showing an embodiment of the pouring device, FIG. 6 is a side view thereof, and FIG. 7 is a plan view thereof.
FIG. 8 is a graph showing the effect. 75... Ladle, 76, 77... Tilting support shaft, 81
... Fan-shaped side plate, 82 ... Front side plate, 83 ... Arc-shaped back side plate, 84 ... Ladle body, 85, 86 ... Pouring spout.

Claims (1)

[Claims] 1. A ladle is formed by providing a front side plate and an arc-shaped back side plate between the fan-shaped side plates on both sides to form a ladle body, and a pouring hole is provided at the top of the front side plate, and the ladle is formed by forming a ladle at the center of the fan-shaped side plate on both sides. In a pouring device that is installed in a ladle and is tiltably supported around a tilting support shaft, two pouring ports are provided on the front plate of the ladle body, and only one tilting support shaft is connected to the other tilting support shaft at a certain level. A pouring device characterized in that it is provided so as to be movable and adjustable in the vertical direction using the fulcrum as a fulcrum.