JPH0562025B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a water heating device for a die-casting machine, and particularly to a water heating device using an electromagnetic pump.

(Prior Art) As a hot water supply device for a die-casting machine, one that uses an electromagnetic pump to pump molten metal from a molten metal insulating furnace to an injection sleeve is known. Such a conventional water heater will be explained with reference to FIGS. 3 and 4.

In these figures, reference numeral 1 indicates a molten metal insulating furnace, and a pot 3 containing molten metal 2 is installed in this molten metal insulating furnace 1 at a distance from the inner wall surface of the molten metal insulating furnace 1.

A molten metal supply pipe 4 is attached to the side surface of the pot 3, and the pot 2 and the injection sleeve 5 are communicated through the molten metal supply pipe 4.

The molten metal supply pipe 4 consists of a duct 4a that penetrates the molten metal insulating furnace 1 and opens at the side wall surface of the pot 3, and a molten metal supply pipe 4b connected to the duct 4a. Magnetic material core 6 from the side
is inserted. A packing member 7 is attached to the attachment portion between the magnetic core 6 and the duct 4a, and the packing member 7 maintains shielding properties.

There is an inverted L on the upper end of the duct 4a opposite the pot 3.
A letter-shaped hot water supply pipe 4b stands up vertically from the duct 4a and is connected to the injection sleeve 5 at its end.

Further, an electromagnetic coil 5 is attached to the outer periphery of the duct 4a, and the electromagnetic coil 5 and the magnetic core 6 constitute an electromagnetic pump. The molten metal is pumped from inside the pot 3 to the injection sleeve 5 by this electromagnetic pump.

(Problems to be Solved by the Invention) However, in the conventional water heater as described above, when replacing the magnetic material core,
First, after draining the molten metal from the molten metal insulating furnace, the magnetic material core must be pulled out of the duct, which takes time to replace, and additional work space is required to pull out the magnetic material core. Furthermore, there was a problem in that the packing member attached to the attachment portion between the magnetic material core and the duct had to be replaced in order to maintain shielding performance.

The present invention eliminates these drawbacks, and allows the magnetic core to be replaced without discharging the molten metal in the molten metal insulating furnace, allowing the magnetic core to be replaced in a short time and without taking up much work space. It is an object of the present invention to provide a hot water supply device for a die-casting machine, which is capable of doing so and also eliminates the need for a packing member at the attachment portion between a molten metal supply pipe and a magnetic material core.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a molten metal insulating furnace for storing molten metal, an injection sleeve that temporarily serves as a molten metal reservoir, and a molten metal insulating furnace. A molten metal supply pipe that communicates the furnace and the injection sleeve, an electromagnetic coil attached to the molten metal supply pipe near the molten metal heat retention furnace, and a core made of a magnetic material inserted into the molten metal supply pipe at a position corresponding to the electromagnetic coil. A hot water supply device for a die casting machine comprising: a core made of a magnetic material inserted into a molten metal supply pipe from the molten metal insulating furnace side;

(Function) In the present invention, since the magnetic material core can be replaced without discharging the molten metal from the molten metal insulating furnace, the replacement work can be done in a short time and without taking up a lot of work space. It is possible to eliminate the need for a packing member at the attachment part.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of a water heater for a die-casting machine according to the present invention.

In the figure, numeral 8 indicates a molten metal insulating furnace.
This molten metal insulating furnace 8 has a pot 1 for storing molten metal 9.
0 is installed at a distance from the inner wall surface of the molten metal heat retention furnace 8.

A molten metal supply pipe 11 is attached to the side surface of the pot 10, and the molten metal supply pipe 11 allows the pot 1 to be
0 and the injection sleeve 12 are in communication.

The molten metal supply pipe 11 consists of a duct 11a that penetrates the molten metal heat retention furnace 8 and opens on the side wall surface of the pot 10, and a molten metal supply pipe 11b connected to the duct 11a. A magnetic core 14 is inserted.

The magnetic core 14 has an inverted L shape, one of which is inserted into the duct 11a and the other is inserted into the holding fitting 1.
5 at the top of the pot 10.

The end of the duct 11a facing the pot 10 is connected to a hot water supply pipe 11b, and this hot water supply pipe 11b is further connected to an injection sleeve 12.

An electromagnetic coil 13 is attached to the outer periphery of the duct 11a, and the electromagnetic coil 13 and the magnetic core 1
4 constitutes an electromagnetic pump. The molten metal is pumped from inside the pot 10 to the injection sleeve 12 by this electromagnetic pump.

FIG. 2 is a sectional view showing details of the magnetic core 14. As shown in FIG.

Reference numeral 16 denotes a rod made of a magnetic material, the outer periphery of which is covered with a heat insulating material 17, and inserted into a pipe 18 whose one end is closed in the shape of a hemisphere. A spacer 19 is welded to the lower side of the pipe 18 to maintain a gap with the inner wall of the duct 11a.

The pipe 18 is screwed to one end of an elbow 20, and a vertically extending pipe 21 is screwed to the other end of the elbow 20. and pipe 21
A stopper 22 is attached to the upper part of the pipe 21, and one end of the stopper 22 is bolted to a holding fitting 15 welded to the pot 10 to hold the pipe 21.

Note that a heat transfer body such as a sheathed heater (not shown) is attached to the outside of the duct, hot water supply pipe, etc. for heat retention.

In such a water heater for a die-casting machine, the magnetic material core can be replaced by simply removing the bolt of the stopper 22, so there is no need to drain the molten metal in the pot 10 during work, which saves time and saves work space. Replacement work can be performed without removing the magnetic core, and a packing member at the attachment portion between the duct and the magnetic core can be made unnecessary.

[Effects of the Invention] In the die-casting machine water supply device of the present invention configured as described above, the magnetic core is inserted into the molten metal supply pipe from the molten metal insulating furnace side, so that the molten metal in the molten metal insulating furnace is The magnetic material core can be replaced without ejecting it, and therefore the magnetic material core can be replaced in a short time and without taking up a lot of work space, and furthermore, a packing member can be eliminated.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a water heater for a die-casting machine according to the present invention, FIG. 2 is a cross-sectional view of the main part of FIG. 1, FIG. 3 is a cross-sectional view of a conventional device, and FIG. FIG. 4 is a sectional view of the main part of FIG. 3; 8... Molten metal heat retention furnace, 9... Molten metal, 11a... Duct, 11b... Hot water supply pipe, 12... Injection sleeve, 13... Electromagnetic coil, 14... Magnetic material core.

Claims (1)

[Claims] 1. A molten metal insulating furnace that stores molten metal, an injection sleeve that temporarily serves as a molten metal reservoir, a molten metal supply pipe that communicates the molten metal insulated furnace and the injection sleeve, and a molten metal heat insulating furnace in the molten metal supply pipe. A water heater for a die casting machine comprising an electromagnetic coil mounted near the furnace and a core made of a magnetic material inserted in a position corresponding to the electromagnetic coil of the molten metal supply pipe, the core made of the magnetic material. is inserted into the molten metal supply pipe from the molten metal insulating furnace side.