JPH045989Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention is a fully automatic melting furnace in which the ladle itself moves to receive the metal directly from the melting furnace, returns to the mold, and pours the metal there. This relates to a pouring device.

(Prior technology) In general, in a melting mold line for copper alloys, etc., the copper alloy is melted in an induction melting furnace or a gas furnace, and the molten metal is received in a ladle or ladle that has been preheated with a gas burner, etc., and then transported manually or by monorail. Transport it to the front of the mold line using a crane, etc. In the case of manual ladle transport, the molten metal is poured manually as it is, and in the case of ladle transport, it is poured directly from the ladle, and the ladle is transferred from the ladle to a holding furnace and the molten metal is placed in front of the ladle so that it can be tilted freely. In some cases, a small amount of molten metal is poured into a hot water cup, and the pouring cup is tilted to pour the molten metal in predetermined amounts into a mold that has been conveyed through a pot line.

In this way, in conventional mold lines, the molten metal heated and molten in the melting furnace is poured directly by hand, or a small amount of molten metal is transferred from the holding furnace to the pouring cup, and poured into the mold from there. The retention time of the molten metal in the ladle and ladle becomes longer. As a result, the temperature drops significantly, and the molten metal oxidizes, generating slag and slag, deteriorating the quality of the molten metal, and causing poor flow of the molten metal, resulting in product defects.

In addition, in conventional equipment, the melting furnace and mold line are often grounded at a separate location, so the ladle is transported by a monorail crane, and the ladle and pouring cup are transported by workers on the casting line. However, the tilting was controlled by visual measurement, which required a lot of manpower and made the work extremely difficult.

(Problems to be solved by the invention) This invention eliminates the above drawbacks, eliminates the need for a ladle for holding and storing hot water, and directly receives the molten metal from the melting furnace little by little with a ladle, and immediately pours it into the mold. This reduces the holding time of the molten metal, prevents the temperature of the molten metal from dropping, and prevents oxidation of the molten metal, thereby improving the quality of the product.In addition, it is possible to pour a fixed amount of molten metal using a weighing device, thereby saving manpower during operation. The present invention provides a fully automatic pouring device for melting furnaces that is automated and greatly improves workability.

[Structure of the idea]

(Means for Solving the Problems) The present invention includes a melting furnace, a mold line disposed in front of the melting furnace, a ladle heating section and a ladle residual metal disposed between the mold line and the melting furnace, respectively. A discharge part, a ladle moving mechanism that supports the ladle so as to be tiltable and moves the ladle in the order of the ladle heating part, the melting furnace, the mold line, and the ladle residual metal discharge part, and the amount of metal received from the melting furnace into the ladle. and a weighing mechanism that detects the amount of molten metal poured into the mold from the ladle.

(Function) In the fully automatic pouring device of the present invention, when the molten metal is heated to a predetermined temperature in the melting furnace, the ladle is preheated in the ladle heating section, and the preheated ladle is moved to the melting furnace by the ladle moving mechanism. Here, the melting furnace is tilted to receive a predetermined small amount of molten metal necessary for casting into the ladle, which is weighed by the load cell weighing device, and then the ladle is moved to the mold line again by the ladle moving mechanism.

Next, the tilting mechanism attached to the moving mechanism is operated to tilt the ladle, and after pouring a predetermined pouring amount into the mold using the load cell weighing device, the ladle is moved to the residual metal discharge section, where it is tilted again. The remaining hot water in the ladle is discharged, the ladle is then preheated in the ladle heating section, and the same cycle is repeated to continuously and automatically pour hot water.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 7.

In the figure, reference numeral 1 indicates two induction melting furnaces installed in parallel. In front of this melting furnace 1, a ladle moving mechanism 3 for moving a ladle 2 in the XY-axis directions is arranged. The weight of this ladle moving mechanism is detected, and the A load cell 7 is installed to detect changes in the amount of internal molten metal. Furthermore, a mold line 5 through which molds 4 are continuously conveyed is arranged in front of the mold line 5.

In the ladle moving mechanism 3, an X-axis rail 8 is provided as a weighing device on a rail stand 6 via a load cell 7, and an X-axis moving mechanism 9 is provided on this rail.

Below this X-axis moving mechanism 9, as shown in FIG. 3, a forwardly inclined Y-axis rail 10 is suspended via a support frame 19, and a Y-axis moving mechanism 11 is attached thereto.

These XY-axis moving mechanisms 9 and 11 are composed of a conveyance AC servo motor, an LM guide, a clutch, wheels, and various sensors.

Further, this Y-axis moving mechanism 11 is provided with a ladle tilting mechanism 12, in which the ladle 2 is supported so as to be tiltable. The ladle tilting mechanism 12 is composed of an electric motor, a hydraulic pump, an electromagnetic proportional control valve, a controller, a hydraulic cylinder, and various sensors, and is adapted to control the tilting speed, stop, and return of the ladle 2.

As shown in FIGS. 4 to 6, the ladle 2 is made of heat insulating material and is formed into a boat shape with a bulging center. A weir plate 13 is attached to the middle upper side, and the rear part is a hot water receiving part 14, and the front part is a water receiving part 14. It is designated as a hot water tap section 15.

Reference numeral 16 denotes a ladle heating section equipped with a gas burner provided inside the ladle moving mechanism 3, and a ladle remaining hot water discharge section 17 is provided near this. Note that 18 is a molten metal.

In addition, tilting of the melting furnace 1, driving of the ladle moving mechanism 3 and ladle tilting mechanism 12, turning on/off of the ladle heating section 16, detection of weight data by the load cell 7, transportation of the mold line 5, etc. are cycled by a programmer (not shown). controlled to do so.

Next, the operation of the automatic pouring device having the above configuration will be explained.

First, metal is heated in the melting furnace 1, and when the molten metal 18 reaches a predetermined temperature, the burner of the heating section 16 is ignited toward the inside of the ladle 2, which is tilted and waiting, as shown in FIG. and heat. The preheated ladle 2 is returned horizontally by the tilting mechanism 12, moved on the XY-axis rails 8, 10 by the XY-axis moving mechanisms 9, 11, and stopped in front of the melting furnace 1. In this state, the melting furnace 1 is tilted, and the molten metal 18 is poured into the receiving portion 14 of the ladle 2, and receives, for example, more than ten kg. The amount of received molten metal is detected by a load cell 7, and when a predetermined amount is reached, the melting furnace 1 is reset.

Thereafter, the XY-axis moving mechanisms 9 and 11 are operated to immediately move the ladle 2 that received the metal to the front of one mouth of the mold 4. Next, the tilting mechanism 12 is operated to tilt the ladle 2 and move the mold 4 from the tapping section 15.
Pour hot water into the water. The amount of poured molten metal is detected by the load cell 7, and when the predetermined amount is reached, the ladle 2 is returned to its original position.Then, as shown in FIG. The predetermined amount detected in step 7 is poured into the mold 4.

At this time, as shown in FIG. 5, slag and slag are dammed in the middle of the ladle 2 by a weir plate 13 with an open bottom, and only the molten metal 18 is tapped out from the tapping section 15.

After that, the ladle 2 moves to the residual metal discharge part 17 and tilts there, and the remaining molten metal 18 in the ladle
be completely discharged.

Thereafter, the tilting angle is changed and heating is performed by the burner of the heating section 16 as shown in FIG. 6, and the same cycle is repeated thereafter. In this way, one cycle is repeated in about 1 minute to automatically pour the molten metal, and when the molten metal 18 in one melting furnace 1 runs out, the molten metal 18 in the adjacent melting furnace 1 has already reached a predetermined temperature. is heated, and thereafter the ladle 2 moves cyclically as shown by the broken line in FIG.

In the above embodiment, an induction melting furnace is used as the melting furnace, but other melting furnaces such as a gas furnace may be used, and the melting furnace is not limited to two installed in parallel, but one or three or more furnaces may be installed.

Further, the shape of the ladle is not limited to the one shown in FIG. 4, and may be of any shape, but it is desirable to have a structure that allows easy reception and dispensing of molten metal and has excellent fire resistance and heat retention.

[Effect of idea]

As explained above, according to the present invention, the ladle moves to the melting furnace, directly receives the small amount of molten metal required for pouring into the mold, and immediately moves to the mold to pour the molten metal. It is possible to obtain a fully automatic pouring device for a melting furnace that has a short holding time, a small temperature drop, prevents oxidation of the molten metal, improves quality, and enables automation and greatly improves work efficiency. can.

[Brief explanation of the drawing]

Figures 1 to 7 show one embodiment of the present invention, in which Figure 1 is a plan view of a fully automatic pouring device, Figure 2 is a front view thereof, Figure 3 is a right side view thereof, and Figure 3 is a right side view thereof. FIG. 4 is a plan view of the ladle, FIGS. 5 and 6 are cross-sectional views of the ladle, and FIG. 7 is an explanatory view showing the operation of the ladle. 1... Melting furnace, 2... Ladle, 3... Ladle moving mechanism, 4... Mold, 7... Load cell, 9...
X-axis moving mechanism, 11... Y-axis moving mechanism, 12...
Tilt mechanism, 16... heating section, 17... residual metal discharge section, 18... molten metal.

Claims (1)

[Scope of utility model registration request] A melting furnace, a mold line disposed in front of the melting furnace, a ladle heating part and a ladle residual metal discharge part respectively disposed between the mold line and the melting furnace, supporting the ladle so as to be tiltable; A ladle moving mechanism that moves the ladle in the order of the ladle heating section, melting furnace, mold line, and ladle residual metal discharge section, and a weighing mechanism that detects the amount of molten metal received from the melting furnace into the ladle and the amount of molten metal poured from the ladle into the mold. A fully automatic pouring device for a melting furnace, characterized by comprising: