JPS5842782B2 - automatic water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic water heater, and more particularly to an automatic water heater configured to accurately and easily obtain the measuring angle and neutral angle of the molten metal. It is.

Injection molding equipment uses an automatic water supply device that supplies molten metal to the casting sleeve, and the molten metal is supplied by moving the molten metal back and forth between the furnace and the casting sleeve.

In such an automatic hot water supply device, the water droplet must be maintained in a predetermined position while pumping out molten metal and during movement.

When this posture is carried out using a hydraulic cylinder, it is difficult to control the hydraulic fluid.

In particular, when pumping out molten metal, in order to accurately obtain the amount of hot water to be supplied, it is necessary to always precisely determine the measuring angle by tilting the dipstick, but this has been extremely difficult.

Furthermore, it has been difficult to maintain a neutral state due to oil leaks and other reasons.

An object of the present invention is to provide an automatic hot water supply device configured so that a ladle can be maintained in a reliable neutral state, and the inclination angle of the ladle can be selected when scooping molten metal, and the amount of molten metal can be changed. It is in.

Hereinafter, the present invention will be described in detail together with embodiments shown in the drawings.

The figure explains one embodiment of the present invention. In the figure, reference numeral 1 indicates a cylinder body, and the internal cylinder chamber is divided into a small diameter part 2 on the rod end side and a large diameter part 3 on the head end side. There is.

A diameter piston 4 is slidably fitted into the small diameter portion 2, and rods 5 and 6 are protruded from both ends of the piston 4.

At the outer end of the rod 6, which is the rod end side,
A block 8 is slidably fixed in a gearbox that is connected to the side of the cylinder body 1, and a pinion gear 10 that is supported within the gearbox 7 meshes with a rack gear 9 formed on the side thereof. .

A chain sprocket (not shown) is fixed coaxially to the side of the pinion gear 10, and an endless chain 14 is connected between this sprocket and a chain sprocket 13 fixed to a fixed shaft 12 of the ladle 11. is wrapped around.

Further, a stopper 15 is screwed onto the side of the gear box 7 at a position corresponding to the block 8, and the amount of the stopper 15 protruding into the gear box γ can be adjusted.

By adjusting the position of the stopper 15, the maximum angle of the ladle 11 when supplying molten metal to the casting sleeve can be determined.

16 is a cylindrical stepped piston, the large diameter part 16a at one end of which is disposed in the large diameter part 3 of the cylinder chamber, and the small diameter part 16b is slidable in the small diameter part 2 of the cylinder chamber. is mated to.

Further, a hole 16c is formed in the small diameter portion 16b,
This hole 1.6c is a through hole 16 formed in the large diameter portion 16a.
It communicates with d.

The rod 5 of the piston 4 is slidably fitted into the hole 16c of the stepped piston 16.

The cross-sectional area of this hole 16c was made smaller than the cross-sectional area of the small diameter portion 2 on the long end side.

That is, if the diameter of the rod 5 and the inner diameter of the hole 16c of the stepped piston 16 are dl, the diameter of the rod 6 is d2, the diameter of the large diameter portion 16a of the stepped piston 16 is d3, and the diameter of the piston 4 is D. πd1"<-(D2-d2")<-d3"4
4 4.

A stopper 17 is screwed onto the end wall of the cylinder chamber of the cylinder body 1 on the side of the large diameter section 3, and a chain sprocket 18 is fixed to the outer end of the stopper 17, and the stopper 17 is arranged at a position away from the chain sprocket 18. A chain 20 is wound between the chain sprocket 19 and the chain sprocket 19, and the chain sprocket 19 can be rotated by a motor 21.

Therefore, by rotating the motor 21, the stopper 17 can be advanced or retracted via the chain 20, and the distance between the stopper 17 and the stepped piston 16 can be set to 11 at maximum.

By adjusting the position of the stopper 17, it is possible to precisely limit the tilting angle of the ladle 11 when scooping the molten metal, that is, the measuring angle.

A pipe 23 is connected to the vicinity of the end of the small diameter part 2 of the cylinder body 1 through a through hole 22, a pipe 25 is connected to the large diameter part 3 through a through hole 24, and each pipe 23.25 is 26,
It is connected via a check valve 27 to a B boat and an A port, which are working fluid delivery ports of a tank port block type four-way switching valve 28, respectively.

The four-way switching valve 28 employs a structure in which the tank port T is blocked inside the four-way switching valve 28 and the A and B ports are directly connected when the four-way switching valve 28 is in the neutral position as shown in the figure.

A hydraulic pressure supply source (not shown) is connected to the pump port P of the four-way switching valve 28.

29 is a tank.

Next, the operation of this embodiment configured as above will be explained.

The illustrated state is a neutral state, and in this state, the same pressure of oil pressure is applied to the long end side of the piston 4 of the small diameter portion 2 of the cylinder body 1 and the large diameter portion 3 side.

However, since the area on the large diameter part 16a side of the stepped piston 16 is larger than the area on the rod 6 side, the force applied to the large diameter part 16a side is stronger. is pushed until it comes into contact with the side end of the small diameter portion 2.

Until this state is reached, the stepped piston 16 is in the small diameter portion 1.
Move while pushing the piston 4 with the tip of the rod 6b.
moves to the right in the figure, and the rack gear 9 of the block 8 rotates the pinion gear 10 in the clockwise direction in the figure, and this rotation rotates the dipper 11 in the clockwise direction in the figure via the chain 14 and the pinion gear 13. and bring it to a neutral state as shown.

This neutral state continues as long as oil pressure is applied to the small diameter portion 2 and large diameter portion 3 of the cylinder body 1.

During this neutral state, the ladle then moves from the furnace to the casting sleeve or vice versa.

Since the ladle is carried in a desired horizontal state, the molten metal in the ladle 11 does not spill, and the amount of hot water supplied each time is constant.

In addition, since the neutral position is reliably maintained during conveyance, there is no ripple or movement of the molten metal during conveyance, and the molten metal in the ladle 11 is conveyed in a completely quiet state, and there is no mixing of air into the molten metal. There is almost no drop in molten metal temperature.

On the other hand, when drawing molten metal, the four-way switching valve 28 is switched to the left in the figure, and the oil pressure from port P is transferred to the small diameter section 2 of the cylinder body via port B, and the oil is transferred from the small diameter section 3 to the boat. It is now in a state where it is released into the tank 29 via A.

Therefore, the piston 4 freely moves toward the large diameter portion 3, the pinion gear 10 is rotated counterclockwise via the rack gear 9, and the dipper 11 is rotated counterclockwise via the chain 14.

This state continues until the large diameter portion 16a of the stepped piston 16 comes into contact with the stopper 17, at which point the dipper 11 stops tilting at a predetermined angle.

In this state, the ladle 11 is lowered into the furnace, and when the ladle 11 is pulled up from the molten metal in the furnace, the molten metal is scooped into the elbow or <11> depending on the inclination angle of the ladle 11.

Therefore, by adjusting the amount of inward protrusion of the stopper 17 into the large diameter portion 3, the inclination angle of the ladle 11 can be arbitrarily and easily adjusted, and the amount of molten metal to be drawn can be freely adjusted.

When this is finished, return the ladle 11 to the neutral position described earlier on the furnace, and, taking care not to spill or ripple the molten metal, lower the ladle 11 to the position of the casting sleeve.
move.

On the other hand, when pouring molten metal into the casting sleeve, if the four-way switching valve 28 is switched to the right in the figure, the oil on the small diameter section 2 side will be released into the tank, and the oil pressure will be applied to the large diameter section 3 side. become.

Therefore, after the stepped piston 16 first moves to the right limit in the figure, it pushes the rod 5 through the through hole 16d, the piston 4 moves to the right, and the pinion gear 10 moves through the rack gear 9 as shown in the figure. Rotated clockwise.

This state continues until block 8 comes into contact with stopper 15.

Therefore, by adjusting the amount of protrusion of the stopper 15, the ladle 11 can be rotated clockwise in the figure up to the necessary limit depending on the amount of molten metal.

The movement of the ladle 11 between the inside of the furnace and the casting sleeve is performed by a conventionally known method.

As is clear from the above description, according to the present invention, in a hydraulically driven automatic water heater, a large diameter part and a small diameter part are formed in the cylinder body, and the large diameter part is formed by a stepped piston. of,
Since the small-diameter portion accommodates a small-diameter piston and is configured as described in the claims, a neutral state can be maintained reliably and easily.

Therefore, the molten metal will not spill out while the diamond is being moved.

In addition, the inclination angle of the diamond can be adjusted arbitrarily by the position of the stoppers provided at both ends of the cylinder body.
Measuring work and pouring work can be adjusted according to the amount of molten metal.

In addition, since the neutral position of the diamond can be reliably maintained at a constant position each time while the molten metal is being transported, not only can the amount of hot water be kept at a constant level each time, but the molten metal does not ripple during transport, and the molten metal is quiet. Air is not mixed into the molten metal, and the temperature of the molten metal hardly drops.

As a result, there are fewer cavities in cast products,
You can obtain high quality cast products.

[Brief explanation of drawings]

The figure is a longitudinal sectional view illustrating one embodiment of the present invention. 1... Cylinder body, 2... Small diameter part,
3...Large diameter part, 4...Piston, 5,
6...Rod, 8...Block, 9.
... Rack gear, 10 ... Pinion gear, 11 ... Hisiya <, 15, 17 ...
Stop collar, 16...Stepped piston, 21...
...Motor, 28...Four-way switching valve.

Claims (1)

[Claims] 1. In an automatic hot water supply device configured to tilt a ladle for hot water supply by a cylinder, the cylinder has a cylinder body in which a small diameter part is formed on the rod end side and a large diameter part is formed on the head end side, A stepped piston with a hole in the center is slidably provided across the large diameter part and the small diameter part of the cylinder body, and rods are provided on both sides of the piston provided in the small diameter part of the cylinder body, A rod on the head end side is provided to be able to slide freely within a hole formed in the stepped piston, and the cross-sectional area of the chamber on the rod end side of the small diameter portion of the cylinder body is larger than the cross-sectional area of the hole in the stepped piston. , an automatic water heater 2 in which a working fluid delivery port of a switching valve that controls the supply of working fluid to the cylinder body is connected to the vicinity of the end of the small diameter portion and to the large diameter portion of the cylinder body 2. Stepped pistons are provided on both sides of the cylinder body, respectively. and a stopper for regulating the limit of movement of the rod 3 Automatic hot water supply device according to claim 1 3 Patent claim using a tank port block type four-way switching valve as a switching valve for controlling the supply of working fluid to the cylinder body The automatic hot water supply device according to item 1.