JPS63149062A - Continuously automatic molten metal supplying apparatus of metal for die-casting machine - Google Patents

Abstract

PURPOSE:To remarkably save heat energy and also to improve the working atmosphere by charging metal pieces in order by circulating plural crucibles arranged annularly and pouring molten metal in order into the injection apparatus by melting in a heating furnace. CONSTITUTION:The crucible 12 is respectively held to plural rotating arms 10 arranged radially to the rotary axis 9, and the crucible 12 is annularly circulated by rotating the rotary axis 9 by a motor 8. The metal pieces are charged in order in the crucibles 12 and an arc-like passage 15 of heating furnace 12 is passed to melt the metal pieces. Next, when the crucible 12 come to just above the pouring hold 3 of injection apparatus 1, a hook part 20 of hanging-up lever 23 is engaged with a projection 19 of the crucible 12 and the hanging lever 23 is drawn up by driving a cylinder 22. In this way, the crucible 12 is turned and tilted as becoming supporting point 13 to the center, and the molten metal in the crucible 12 is flowed into the plunger sleeve 2 through the pouring hole 3. In this way, the molten metal for die casting is automatically and continuously supplied into the injection apparatus 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous automatic melting hot water supply device that automatically melts metal material for die casting one shot at a time and continuously supplies hot water to a die casting machine.

[Conventional technology]

Conventionally, in a cold melting bar type die-casting machine, in order to supply molten metal into the die-casting machine's three chambers, the metal is melted in a large melting furnace and then transferred to an insulating furnace to maintain a constant temperature of a K. Then, for each shot, use a ladle to pump out a certain amount of molten metal from the insulated furnace.
The method used is to pour the molten metal into the spout of the brush sleeve of the die-casting machine.

[Problem that the invention seeks to solve]

In the conventional method of supplying molten metal to a die-casting machine, a high-temperature insulating furnace is installed adjacent to the die-casting machine, and a large amount of molten metal must be stored in the insulating furnace during work. It requires a large amount of heat, and the high-temperature insulating furnace creates an extremely poor working environment. In addition, since a large amount of molten metal is stored in a heat-retaining furnace, the amount of heat generated is extremely large if the operation is interrupted due to a failure of the die-casting machine, a failure, etc.

Furthermore, since the molten metal is exposed to the atmosphere in the insulating furnace, the molten metal such as aluminum and zinc is oxidized and is lost.

Therefore, the present invention does not use a large-scale melting furnace or heat-retaining furnace.
It is an object of the present invention to provide a continuous automatic metal melting water supply device for die casting, which can sequentially melt the required amount of metal for each shot of the casting machine and pour the melt into the casting machine.

[Means for solving problems]

The present invention provides a hot water supply device for supplying molten metal to a tie-in strike machine, which supports a heating furnace having a tunnel-like passage and a plurality of crucibles arranged in an annular manner so as to be rotatable along the annular arrangement. A transfer means for transferring the crucible through a tunnel-like passage, an overturning means for inverting the crucible when the crucible reaches a certain position, pouring the molten metal in the crucible, and restoring the crucible to the standing position; - A continuous automatic metal melting water supply device for die casting, characterized in that it is equipped with a supply means for supplying a fixed amount of solid metal to the rib.

Next, the contents of the present invention will be explained in detail with reference to the drawings. Fig. 1 is a front view showing an example of the molten water supply apparatus of the present invention, with a part cut away.

(1) is an injection device of a die-casting machine, which presses molten metal poured from a pouring port (3) of a brush sleeve (2) into a mold (5) by a brush sleeve (4). There is. (6) is a continuous automatic melting water supply device of the present invention, which is attached to a mounting arm (7).
) A plurality of L-shaped rotating arms (10) are radially fixed to the lower end of a rotating shaft (9) that is rotatably supported vertically by a U-shaped crucible support frame (I).
I). The crucible support frame (11) is the crucible 112)
is supported swingably around a fulcrum (13). For example, two depressions are provided on the outside of the upper part of the crucible, and the tip of the U-shaped rib support frame (11) is fitted into these depressions. Ceramics such as alumina are used for the crucible to prevent contamination of the molten metal.

(14) is a heating furnace, and as shown in the horizontal and vertical cross-sectional views in FIGS. The bottom of the passageway has an arcuate notch (I61) that leads to the outside and through which the rotating arm passes.
The crucible support frame (11) on which the
4) The heating furnace (I4) has an inner wall made of ceramics or refractories, and is equipped with a gas flame, electric heater, arc, low frequency or high frequency induction, and other Heated by a heat source.

(I7) is a material charging device for charging the metal to be melted into the crucible, and is designed to charge solid metal in the amount required for one shot of the tin strike machine into the rotating crucible one by one.

08) is an example of a crucible overturning device. In this case, the crucible is provided with a locking protrusion 09) projecting laterally at one end of the upper part, and a hook part 120 at the lower end, as shown in FIGS. 4 and 5.
), is able to swing around a fulcrum (21), and is lifted and lowered and driven by a lifting mechanism such as a hydraulic screw rod (
23), the hook portion (20) is engaged with the engagement protrusion (19j) to pull up one end of the crucible (12) and overturn the crucible.

Instead of arranging the pots on the circumference as shown in Figure 2, they are arranged on the circumference of an elongated circle and transported along the elongated circle using a conveyor or other transfer means. U
The residence time of the crucible in the heating furnace can be extended by providing a shaped passageway through which the crucible is transferred.

FIG. 6 shows a cross-sectional view of an example of a heating furnace in which metal in a crucible is melted by direct arc.

Electrode insertion holes at the top and bottom of the heating furnace θ4)! 24) A support is provided, and an electrode made of graphite or a high melting point metal is inserted through the electrode insertion hole. The upper and lower electrodes are provided so as to be movable up and down by means of lifting means (not shown).

In the case of direct melting by arc, a metal electrode is buried in the bottom of the crucible (12) by penetrating the bottom, and the lower electrode or the upper end is in contact with the lower surface of the metal electrode and the metal electrode is melted through the metal electrode. The metal piece 829) in the crucible 112) is electrically connected.

Upper and lower tffl@61. It is desirable to provide (27) at multiple locations along the arcuate passage 115) of the heating furnace (14) and melt the metal in the crucible by igniting an arc multiple times. , (C) are circular notch holes, and the arc can be ignited while moving the upper and lower electrodes 1261 and 271 as the crucible moves. Metal electrode on the bottom of the crucible? 9 may be omitted, and two electrodes may be inserted from above the crucible to perform melting by indirect arc.

In the case of an arc furnace, since the melting metal is oxidized by the high-temperature arc, it is desirable to adjust the atmosphere near the arc or the entire inside of the furnace with an inert gas such as Alj or Nia.

[Effect]

Next, the operation of the continuous automatic melting water supply apparatus will be explained.

Crucible support frame (11) at the tip of the radial rotating arm (10)
Crucibles (12) arranged in a ring with each placed on top
is rotated integrally with the rotary shaft (9) at a constant speed or intermittently by the rotation of the rotor (8) ◇The rotation speed is determined by the cycle time required for molding of the die-casting machine (e.g. 15~
20 seconds), the crucible is set to rotate in the adjacent crucible position groove.

Material input device (After the metal pieces cut into the amount required for one shot are input into the crucible θ powder, the crucible (12
) is fed into the arc-shaped passage (+5) of the heating furnace (14).While passing through the heating furnace (14), the metal piece (29) in the crucible (12) is melted and becomes molten metal at a constant temperature. heating furnace(
14). Crucible containing molten metal (I2
) is directly above the spout (3) of the casting machine, the hook part shi0) of the lifting rod 123) touches the engagement protrusion (19) of the crucible.
). This drives the syringe and barrel, and lifts the lifting rod (
23+ is pulled up and the crucible (1 powder engagement protrusion 09) is pulled up, so the crucible (12) rotates around the fulcrum '13) and falls over, and the molten metal in the crucible is poured from the pouring port (3) into the brush. Molten metal is poured into the sleeve (2). When the crucible falls to a certain angle, the retaining protrusion (19) and the lifting rod (
The hook part 23) is naturally disengaged, and the crucible (1 powder) is restored. The empty crucible (I2) is moved to the position of the material input device 07). The lifting rod (23) descends to its original position before the next crucible moves.

When using the arc heating furnace (I4) shown in FIG. 6, the rotating shaft (9) is rotated intermittently. Electrode 26)
.

When the crucible (12) stops at position η, the upper electrode moves down and its upper end is inserted into the crucible, and at the same time the lower electrode moves up and its upper end touches the bottom surface of the metal electrode 281 of the crucible. come into contact with An arc voltage is applied to the upper and lower electrodes 2■, 271, and the upper electric current '%f2fli) and the metal piece! 29), and the height of the upper electrode 6) is adjusted so as to obtain a predetermined arc voltage.

After being ignited for a certain period of time, it is extinguished and the upper and lower electrodes (2■.

(1) are separated vertically, and the crucible (1□□□ is rotated to the next electrode position. Metal piece 9) is melted by multiple arc ignitions and heated to a predetermined temperature.

The above description and drawings show an example of the continuous automatic melting hot water supply system for metal for die casting of the present invention, and the present invention is not limited thereto. The means can be arbitrarily changed within the scope of achieving the object of the present invention.

〔Effect of the invention〕

According to the continuous automatic melting water supply device for metal for die casting of the present invention, a large metal melting point and a heat-retaining furnace are not required, and thermal energy can be significantly reduced. Furthermore, the insulating furnace, which causes work in extreme heat, can be abolished, greatly improving the working environment. Heat loss due to start and stop of die-casting machine operation,
Since there is no time loss, you can freely set your operating hours. By molding the molten metal immediately, it exhibits remarkable effects such as eliminating loss due to oxidation of the molten metal.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view of an example of a continuous automatic melting water supply device for die-casting metal of the present invention attached to a die-casting machine;
Figure 2 is a horizontal sectional view of the same molten water heater, and Figure 3 is the same AA.
4 is a vertical sectional view of an example of a crucible used in the present invention, FIG. 5 is a plan view thereof, and FIG. 6 is a sectional view of an example of an arc heating furnace. Code explanation (1)...Die-casting machine injection device (2)...Plastic injection mold (3)...Pouring port (4)...Brush caster chip (5)...Mold (6)...Continuous automatic melting water supply device (7)...Mounting arm (8)...Motor (
9)... Rotating axis (lO)... Rotating arm (11)... Crucible support frame 02)... Crucible (I
(Capital)...Fully point (14)...Heating furnace 1
15j...Circular passageway (I6)...Notch 0
7)...Material loading device (18)...Tipping device (1
9)...Engagement protrusion (2o)...Hook part l)
・・・Fully point: Hydraulic cylinder)...
Lifting rod 4), (25)... Electrode insertion hole (
2Q, η...electrode felling...metal electrode 29+
...Metal Piece Patent Applicant Yoshiyuki Koyama, Attorney Patent Attorney for Soritsu Ticast Industry Co., Ltd. Figure 5 Figure 4 Figure 2 Figure 3 Procedure Nei City Official Book (Method) March 2, 1985 l , Indication of the case 1985 Patent Application No. 297346 2゜ Name of the invention Continuous automatic melting hot water supply device for die casting metal 3 Person making the amendment Relationship to the case Patent applicant Address 1-1 Nakata Ideimachi, Sakai City, Osaka Prefecture Number 4 Name Soritsu Die Casting Industry Co., Ltd. Representative Nori Kuwana 4, Agent

Claims (4)

[Claims] (1) A water heater for supplying molten metal to a die-casting machine, which supports a heating furnace having a tunnel-shaped passage and a plurality of crucibles arranged in an annular manner so as to be able to rotate along the annular arrangement; a transfer means for transferring the crucible through a passage; a tipping means for inverting the crucible when it reaches a certain position and restoring the crucible to its standing position after pouring the molten metal in the crucible; 1. A continuous automatic metal melting water supply device for die casting, characterized in that it is equipped with a supply means for supplying a large amount of solid metal. (2) The continuous automatic melting water supply device for metal for die casting according to claim 1, wherein the heating furnace is an arc heating furnace. (3) Electrode insertion holes are provided at the top and bottom of the heating furnace, and upper and lower electrodes that are automatically raised and lowered by a lifting mechanism are inserted through the electrode insertion holes, respectively, and the electrodes are embedded in the bottom of the crucible by penetrating the bottom. Continuous automatic melting of metal for die casting according to claim 2, wherein the lower electrode is brought into contact with the lower surface of the electrode of the crucible, and the metal pieces are directly melted by an arc between the metal pieces in the crucible and the upper electrode. Water heater. (4) The continuous automatic melting water supply device for metal for die casting according to claim 3, wherein the electrode insertion hole, the upper electrode, and the lower electrode are provided at a plurality of locations along the tunnel-like passage of the heating furnace.