JP2002137051A - Metal material supplying apparatus for casting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal material supplying apparatus for casting equipment capable of enhancing the accuracy with which molten metal is poured while the structure is not only kept simple, but also can solve conventional problems. SOLUTION: The metal material supplying apparatus 10 for casting equipment, which apparatus 10 melts and dispenses metal material and supplies it into a molten-metal inlet 2 of an injection sleeve 1 connected to a metal cavity, is so adapted to be equipped with a metal material transport means 20, a molten metal storage pot 40, a molten metal supplying pipe 45, a mass quantity measuring means 50, a molten metal supplying means 60, and a control means 70 that regulates the driving of the molten metal supplying means 60. The mass of the molten metal as well as the molten metal storage pot, the molten metal supplying pipe, etc., is measured by the mass quantity measuring means 50, which results in not being subjected to the influence by the change in the area of cross section of the molten metal supplying pipe, in the gas pressure within the metal cavity, and in the voltage, etc. Consequently, the accuracy of the molten metal pouring is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supplying a metal material to a casting machine, and more particularly, to a method for converting a metal material such as aluminum or magnesium alloy into a molten metal.
The present invention relates to an apparatus for supplying a metal material to a casting machine, which is preferably used when quantitatively measuring the molten metal and supplying it to an injection sleeve connected to a mold cavity.

[0002]

2. Description of the Related Art A metal material supply device (hot water supply device) for supplying a metal material to an injection sleeve connected to a mold cavity of a die casting machine is known. There are many methods for quantitative measurement of molten metal. For example, there are (1) a method using an electromagnetic pump and (2) a one-shot melting and hot water supply method. In the method of (1), the amount of molten metal is measured and supplied by controlling the drive time (hot water supply time) of the electromagnetic pump. In the method (2), molten metal equivalent to one shot is supplied to, for example, a measuring chamber, and the molten metal in the measuring chamber is supplied to the injection sleeve by a piston or the like.

[0003]

However, there are the following problems with the conventional method for quantitatively measuring molten metal in a metal material supply apparatus. In the electromagnetic pump method (1), since the quantitative and light weight is controlled by the driving time (hot water supply time) of the electromagnetic pump, changes in the cross-sectional area of the hot water supply pipe, changes in gas pressure in the mold cavity, voltage fluctuations, etc. And the accuracy of hot water supply is low. In addition, a large-volume constant-temperature-holding furnace and a melting furnace are required, which requires a large apparatus space. (2) In the one-shot melting and hot water supply method, a valve that can be opened and closed is provided between the measuring chamber and the molten metal supply side,
A drive device or the like for driving the valve is required, and the structure is complicated because all of them are provided in a closed space (closed structure). further,
When the metal material corresponding to the one shot in the measuring chamber is melted to obtain the metal material, the supplied metal material and the material remaining in the measuring chamber are mixed. It is difficult to ensure the cleanliness of the molten metal. Further, since the molten metal adheres to the inner wall of the measuring chamber, the tip of the piston, or the like, the supplied molten metal is not always supplied as measured, and the accuracy of hot water supply varies. Further, since the measuring chamber is provided separately from the molten metal supply side, it is difficult to keep the temperature of the molten metal in the measuring chamber equal to the temperature of the molten metal on the molten metal supply side, and it is difficult to control the temperature.

An object of the present invention is to provide a metal material supply apparatus for a casting machine which can improve the accuracy of hot water supply with a simple structure and can solve the conventional problems. .

[0005]

In order to achieve the above object, an apparatus for supplying a metal material to a casting machine according to the present invention employs the following constitution. That is, the invention according to claim 1 is a metal material supply apparatus for a casting machine which melts, quantitatively measures, and supplies a metal material to a hot water supply port of an injection sleeve connected to a mold cavity. A metal material transferring means for supplying a molten metal storing pot which melts the metal material supplied from the metal material transferring means to form a molten metal and stores the molten metal therein for at least one shot or more; A hot water supply pipe provided between the injection sleeve and containing the molten metal, the molten metal storage pot, the hot water supply pipe and a device attached thereto, and the molten metal storage pot, including the molten metal inside the hot water supply pipe. Mass measuring means for measuring the total mass, molten metal supply means for supplying the molten metal in the molten metal storage pot to a hot water supply port side of the injection sleeve, And a control means for controlling the driving of the molten metal supply means based on a signal from the amount measurement means.

According to the present invention, the metal material supplied from the metal material transfer means is melted in the molten metal storage pot to become molten metal, and from the molten metal storage pot through the hot water supply pipe, the hot water inlet of the injection sleeve. Supplied to At this time, the mass of the molten metal storage pot, the hot water supply pipe and the devices attached thereto, and the entire mass including the molten metal inside the molten metal storage pot and the hot water supply pipe are measured by the mass measuring means. It is not affected by changes in area, changes in gas pressure in the mold cavity, voltage fluctuations, and the like. Therefore,
Hot water supply accuracy can be improved.

Further, since the molten metal storage pot only needs to store at least one shot or more, a relatively small molten metal storage pot can be used, and a large-volume holding furnace and a melting furnace are not required. In addition, there is no particular problem even if the molten metal remaining in the molten metal storage pot is mixed with the molten metal supplied next, whereby the cleanliness of the molten metal can be ensured. Furthermore, since the molten metal in the molten metal storage pot can be directly supplied from the hot water supply pipe, the temperature of the molten metal can be controlled by controlling the temperature of the molten metal in the molten metal storage pot. Control becomes easy.

In the present invention, the metal material includes a granular metal material or an ingot, and such metal materials include aluminum, magnesium, zinc, and alloys thereof. Further, the metal material transfer means may be a device that can supply a metal material to the molten metal storage pot, for example, a device using a hopper or the like for charging a granular metal material, or an ingot or the like, The ingot may be of any type, such as having a structure capable of preheating and melting the ingot.

Further, the molten metal storage pot needs to be capable of storing at least one shot or more, but one shot corresponds to the largest one of the mold cavities to be used. It is preferable that the molten metal storage pot has a size larger than that, for example, 3 to 4 shots. Furthermore, if the mass measuring means can measure the entire mass of the molten metal storage pot, the hot water supply pipe and the device attached thereto, and the molten metal storage pot, the molten metal inside the hot water supply pipe can be measured. Although any type may be used, for example, a load cell is preferably used. In this case, any load cell such as a strain gauge type, a magnetostrictive type, and a piezoelectric type may be used. The molten metal supply means may be of any type as long as it can supply the molten metal in the molten metal storage pot to the injection sleeve via the hot water supply pipe.
It is preferable to use an electromagnetic pump, a piston pump or the like.

According to a second aspect of the present invention, in the apparatus for supplying a metal material to the casting machine according to the first aspect, the metal material transfer means preheats the granular metal material fed into the hopper while feeding the metal material. It is characterized by having a feed / preheating means.

According to the present invention, the granular metal material put into the hopper is fed and preheated by the feed / preheating means, and then supplied to the molten metal storage pot and melted there. In addition, rapid dissolution of metallic materials is possible. Therefore, even if the molten metal storage pot has a relatively small capacity, it is possible to cope with a constant supply of a wide range of metal materials from large to small. Therefore, space saving and energy saving can be achieved. In addition, since the granular metal material can be supplied into the pot while preheating, melting in the pot is easily performed, the time until the supply can be shortened, and the burden of heating in the pot can be reduced. . In the present invention described above, the heating method of the feeder / preheating means may be any method such as a method using electric resistance such as a nichrome wire, a method using high frequency, and a method using gas.

According to a third aspect of the present invention, in the apparatus for supplying a metal material to a casting machine according to the first or second aspect, the mass measuring means includes a plurality of load cells. It is assumed that. According to the present invention as described above, the entire mass including the molten metal storage pot, the hot water supply pipe and the device attached thereto and the molten metal storage pot, and the molten metal inside the hot water supply pipe are measured by the plurality of load cells. Therefore, the supply amount of the molten metal for one shot can be accurately measured. In particular, by using a load cell with high accuracy (for example, ± 0.1% or less), the accuracy of hot water supply can be further improved.

According to a fourth aspect of the present invention, in the metal material supply device for a casting machine according to any one of the first to third aspects, the molten metal supply means is constituted by an electromagnetic pump. It is characterized by the following. According to the present invention, the molten metal in the molten metal storage pot is
It is supplied to the injection cylinder by an electromagnetic pump. Since the electromagnetic pump is used, the conventional valve device and the like are not required, so that the device is simple and lightweight. Further, since there is no sliding portion such as a piston, the life can be extended.

According to a fifth aspect of the present invention, in the metal material supply apparatus for a casting machine according to the fourth aspect, the coil portion of the electromagnetic pump is in a non-contact state with the molten metal storage pot and the hot water supply pipe. It is characterized by being provided. According to the present invention, the mass of the coil portion of the electromagnetic pump is excluded from the measurement target of the mass measuring unit, and the mass corresponding to the mass need not be measured, so that the mass measuring unit can be downsized. In the present invention described above, the coil portion may be supported in any form as long as the coil portion is provided in a non-contact state with the molten metal storage pot. For example, the support member may be supported by a support member erected on the floor surface, or a hanging member or the like may be lowered from a ceiling or the like and supported by the support member.

According to a sixth aspect of the present invention, in the metal material supply apparatus for a casting machine according to any one of the first to third aspects, the molten metal supply means is constituted by a piston pump. It is characterized by the following. According to the present invention, the molten metal in the molten metal storage pot is supplied to the injection cylinder by the piston pump.
Since a piston pump is used and a conventional valve device or the like is not required, the device is simple and lightweight.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a metal material supply device (hereinafter, simply referred to as a supply device) 10 to a casting machine according to a first embodiment. The supply device 10 melts a metal material such as aluminum or magnesium and quantifies and measures the molten metal.
Is a hot water supply device for supplying to a hot water supply port 2 provided at an upper portion of the hot water supply device. The injection sleeve 1 is connected to a mold cavity (not shown).

The supply device 10 includes a metal material transfer means 20 for supplying a metal material while preheating the metal material, and a molten metal containing the metal material supplied from the metal material transfer means 20 and being melted by a heater device 44 or the like. Storage pot (hereinafter,
A hot water supply pipe 45 provided between the pot 40 and the injection sleeve 1 and containing molten metal.
A pot 40, a hot water supply pipe 45, and devices such as a heater device 44 attached thereto, and a pot 40, a mass measuring unit 50 for measuring the entire mass including the molten metal inside the hot water supply pipe 45, And a control for controlling the driving of the molten metal supply means 60 based on a signal from the mass measuring means 50. The molten metal supply means 60 supplies the molten metal to the hot water supply port 2 side of the injection sleeve 1 through the hot water supply pipe 45. Means 70
Is configured with

The metal material transfer means 20 includes a hopper 25 for charging a granular metal material, and a feeder / preheating means 30 for preheating the metal material supplied to the hopper 25 while feeding the metal material. The hopper 25 has a container body 26 having an upper end surface opened and a lower end gradually tapered to communicate with the feeder / preheating means 30.
And a lid 27 for closing the upper end opening of the container body 26. Further, a nozzle 28 is provided on a side surface near the upper end opening of the container body 26, and an inert gas such as argon is appropriately injected into the container body 26 from the nozzle 28.

The feeder / preheating means 30 includes a guide cylinder 31 having an upper end connected to the hopper 25, a metal screw 32 rotatably housed in the guide cylinder 31, and a screw 32. The rotary actuator 33 includes a rotary actuator 33 for a feeder that is driven to rotate. The actuator 33 is connected to the control unit 70.

The guide cylinder 31 is formed to have a predetermined length, and is provided at its distal end (on the pot 40 side) with a distal cylindrical part 31A extending downward by changing its direction by 90 ° from horizontal. . The end of the distal end cylindrical portion 31A is open, and this opening is used for the outlet 3 of the metal material from the metal material transfer means 20.
1B. The distal end of the screw 32 is supported by the distal end tubular portion 31A via the support shaft 32A.

A heater 34 for preheating the granular metal material to a predetermined temperature is mounted on the outer periphery of the guide cylinder 31. Accordingly, the granular metal material supplied from the hopper 25 is preheated to a predetermined temperature by the heater device 34 while being fed by the screw 32 in the guide cylinder 31, and is sent to the pot 40 from the outlet 31 </ b> B of the guide cylinder 31. Sometimes, the temperature is such that the pot 40 can be easily dissolved.

The pot 40 is formed, for example, in the shape of a rounded cylinder with a bottom, and the upper end of the pot 40 is placed over the outer periphery of the distal end tubular portion 31A of the guide tube 31 with a predetermined gap. ing. A nozzle 43 is provided on a side surface near the upper end of the pot 40, and an inert gas such as argon is appropriately injected into the pot 40 from the nozzle 43. A gas shield ring 42 is provided at the upper end of the pot 40 so that the inert gas does not leak outside. Further, a heater device 44 is provided around the entire periphery of the pot 40, so that the metal material supplied into the pot 40 is heated and melted.

A paragraph section 4 is provided at an upper part of the pot 40.
0A is formed, and a level sensor 46 is provided in the paragraph section 40A. The level sensor 46 has one end connected to the control means 70 and the other end inserted into the pot 40, and measures a reference level (stable metal surface) L1 of the molten metal inside the pot 40. ing. The reference level L1 is set in advance in the pot 40.
This is the level of the molten metal after one shot of molten metal corresponding to the cavity of the mold to be used is added to the molten metal up to the level L2 after the supply, which is accommodated therein.

On the lower side surface of the pot 40, the hot water supply pipe 45 is provided. The hot water supply pipe 45 is formed of a round tubular member, and has a lower end communicating with the pot 40 and an upper end side inclined downward and obliquely upward with the pot 40 side lowered. The hot water supply pipe 45 is formed to have a length such that the upper end thereof is located at substantially the same height position as the upper end of the pot 40. And inside the hot water supply pipe 45,
Further, the upper end portion is filled with the molten metal so as to be at the same level as the reference level L1 of the molten metal in the pot 40.

A funnel 61 is provided at the upper end of the hot water supply pipe 45, and a connecting portion between the hot water supply pipe 45 and the funnel 61 is connected to the hot water supply pipe 4.
5 is a molten metal outlet 45A. The lower end of the molten metal outlet 45A is located at the same height as the height of the reference level L1, so that the molten metal is accommodated up to the lower end of the molten metal outlet 45A. The heater device 44 is also provided on the entire circumference of the hot water supply pipe 45.

The upper end of the funnel 61 and the hot water supply pipe 45 is covered with a lid member 62 over both ends. This lid member 62
Is provided with a nozzle 63, from which an inert gas such as argon is appropriately injected into the funnel 61. The lower end of the funnel 61 communicates with the hot water supply port 2 of the injection sleeve 1. The devices mounted on the pot 40, such as the funnel 61, the lid member 62, the heater device 44, and the core 65 of the electromagnetic pump 60 described later, have the mass together with the pot 40, the hot water supply pipe 45, and the molten metal therein. It is an object of measurement by the measuring means 50.

The mass measuring means 50 includes two sets of load cells 53 and 54. The load cell 53 is provided below the pot 40, and the load cell 54 is provided below the hot water supply pipe 45. It is provided through. The support members 51 and 52 are each formed of a substantially bar-shaped heat insulating material. Such load cells 53, 54, etc. are arranged in a well-balanced manner so that the mass attached to the pot 40, the hot water supply pipe 45, the pot 40, etc., and the molten metal inside the pot 40, etc., can be accurately measured. .

As the load cells 53 and 54, for example, strain cells of a strain gauge type are used in which a strain caused by a load is detected by a strain gauge, and the magnitude of the load acting from the strain is obtained. , 54 are sent to the control means 70.

The molten metal supply means 60 supplies the molten metal in the hot water supply pipe 45, in other words, in the pot 40 to the injection sleeve 1 through the funnel 61 as described above, and is provided by an electromagnetic pump. It is configured. The electromagnetic pump 60 includes a core portion 65 and a coil portion 66. The core portion 65 is supported by a lid member 62 at the tip of the hot water supply pipe 45, and moves the center of the hot water supply pipe 45 near the lower end. It is provided to extend to.

The coil part 66 is formed in a cylindrical shape, and
5 is placed in a state covered with a predetermined gap around the hot water supply pipe 45 so as to be orthogonal to the flow of the molten metal in 5,
It is supported by a pump bracket 67. The pump bracket 67 includes a ring-shaped portion 6 for fixing the coil portion 66.
7A and a ring-shaped portion 67A, and has a horizontal installation portion 67B at the lower end thereof. Therefore, the pump bracket 67, the core portion 65 of the electromagnetic pump 60, and the hot water supply pipe 45 The mass of the pump bracket 67 and the core 65 of the electromagnetic pump 60 does not reach the load cells 53 and 54. The coil portion 66 is arranged such that one end in the length direction, that is, a portion fixed to the pump bracket 67 is substantially in the same line position as the distal end portion of the core portion 65.

The control means 70 calculates the total mass at the reference level L1 = [A + B], the total mass after supplying one shot =
Assuming that [A ′ + B ′] and the mass of one shot = [C], there is a function of stopping the drive of the electromagnetic pump 60 when [A + B] − [C] = [A ′ + B ′] is satisfied. . That is, the control unit 70 stores the mass of the pot 40, the hot water supply pipe 45, and the like, the mass of the molten metal stored in advance therein, and the mass of the molten metal for one shot corresponding to the cavity of the mold. And the electromagnetic pump 6
In a state in which the drive of 0 is stopped, the metal material is supplied to the pot 40 by the metal material transfer means 20 from the position of the post-supply level L2 stored in advance, and when the metal material is melted there and reaches the reference level L1, the supply is stopped. Then, after the various conditions are satisfied, the quantitative metering means 50 including the load cells 53 and 54.
Then, the electromagnetic pump 60 is driven until the molten metal at the reference level L1 reaches the level L2 after supplying one shot, and the molten metal for one shot is supplied to the hot water supply port 2 of the injection sleeve 1; It has a function of stopping the material supply by the electromagnetic pump 60.

Next, the operation of the present embodiment will be described with reference to the flowchart shown in FIG. Step (hereinafter, referred to as ST) 1: The operator inputs the fixed amount of the metal material, that is, the supply amount for one shot, and the molten metal temperature (the temperature of the molten metal) to the control means 70. (ST2): Operation preparation of the metal material supply device 10 is started. (ST3): The rotary actuator 33 is operated according to a command from the control means 70, and the feeder / preheating device 3 is operated.
At 0, the metal material is supplied to the pot 40 while preheating.

(ST4): Dissolution of the metal material in the pot 40 is started. (ST5): The level sensor 46 measures the reach of the molten metal material to the molten metal reference level (constant molten metal level) L1. (ST6): The driving of the rotary actuator 33 is stopped, and the supply of the metal material by the feeder / preheating device 30 is stopped. (ST7): The mass of the pot 40 and the molten metal therein (in a state where the molten metal has reached the reference level L1) is stored in the control means 70.

(ST8): Check the temperature of the molten metal OK with a thermometer (not shown) (confirm that the temperature of the molten metal in the pot 40 has reached the specified temperature that was input first).
Then, it is confirmed that the molten metal has reached the reference level L1. (ST9): Operation preparation of the metal material supply device 10 is completed. (ST10): Start of casting machine cycle. (ST11): The start signal of the molten metal supply means (electromagnetic pump) 60 is issued by the control means 70. (ST12): Start operation of the electromagnetic pump 60. (ST13): Hot water supply to the injection sleeve 1 is started.

(ST14): Based on the signals from the load cells 53 and 54, the control means 70 measures and calculates the mass of the pot 40 and the molten metal therein. (ST15): Confirmation that the electromagnetic pump 60 has reached the stop command value (confirmation that the molten metal has reached the level L2 after supplying one shot of molten metal from the molten metal reference level L1).
Is performed by the control means 70. (ST16): Stopping of the electromagnetic pump 60. (ST17): Waiting for the plunger tip of the casting machine to advance,
Timer count starts (hot water supply wait timer).

(ST18): Waiting for the plunger tip of the casting machine to advance, counting is completed (conditions for this are that ST3 in the next cycle is started). (ST19): The plunger tip of the casting machine advances (injection operation of molten metal). (ST20): The mold is held for a predetermined time. (ST21): The plunger tip of the casting machine retreats. (ST22): Post-process of the casting machine is completed (ST10 is started on condition that the post-process is completed and the operation preparation in ST9 is completed).

According to the above embodiment, the following effects can be obtained. (1) The metal material supplied from the metal material transfer means 20 is:
It is melted in the pot 40 and becomes molten metal. Since the mass of the molten metal and the mass of the pot 40, the hot water supply pipe 45 and the like are measured by the load cells 53 and 54 of the mass measuring means 50, the change of the cross-sectional area of the hot water supply pipe and the gas in the mold cavity are measured. It is not affected by pressure change, voltage fluctuation, etc. Therefore,
Hot water supply accuracy can be improved.

(2) The mass measuring means 50 includes two sets of load cells 53 and 54, and the mass of the pot 40, the hot water supply pipe 45 and the like and the mass of the molten metal in them are as follows.
Since the measurement is performed by two sets of load cells, the supply amount of the molten metal for one shot can be accurately measured. In particular,
By using a high-accuracy (for example, ± 0.1% or less) load cell, the accuracy of hot water supply can be further improved. Here, the hot water supply accuracy refers to an error of the hot water supply amount with respect to the total mass. For example, the sum of the mass of the pot 40, the hot water supply pipe 45, and the like and the mass of the molten metal inside them is 8.5 kg (8500 kg).
g) When the mass of the molten metal reaches the reference level L1, the mass is 1.5 kg (1500 g), and the hot water supply amount is 0.5 kg.
(500 g), when the accuracy of the measuring device is ± 0.1%, the total mass is 1 which is the sum of 8.5 kg and 1.5 kg.
It is 0 kg (10000 g), and the hot water supply accuracy under such conditions is obtained as follows. Hot water supply accuracy = ± (10000 x 0.1 x 10 ^-2 / 500)
× 100 = ± 2%, and a high accuracy of a hot water supply error of 10 g can be obtained. By the way, if it is ± 2% or less, it can be said that the accuracy is high.

(3) The molten metal supply means 60 is constituted by an electromagnetic pump, and does not require a conventional valve device or the like, so that the device is simple and lightweight. Further, since there is no sliding portion such as a piston, the life can be extended. (4) The coil portion 66 of the electromagnetic pump 60 is provided in a non-contact state with the pot 40, the hot water supply pipe 45, and the like.
Since the measurement is not performed at the measurement target 54 and the mass of the measurement need not be measured, the size of the load cells 53 and 54 can be reduced.

(5) Since the pot 40 can accommodate at least one shot or more, there is no particular problem even if the molten metal remaining in the pot 40 and the next supplied molten metal are mixed. Thereby, the cleanliness of the molten metal can be ensured. (6) The molten metal in the pot 40 is stored in the pot 40 and the hot water supply pipe 45 communicating with each other, and is supplied from the hot water supply pipe 45 to the hot water supply port 2 side of the injection sleeve 1. The temperature may be controlled, which facilitates the temperature control.

(7) The metal material transferring means 20 includes a hopper 25
Is provided with the feed / preheating means 30 for preheating while feeding the granular metal material charged into the hopper, so that the granular metal material charged into the hopper is
After being fed and preheated by the heater, it is fed into a pot 40 where it is melted. As a result, the metal material can be rapidly melted, the time until supply can be shortened, and the burden of heating in the pot 40 can be reduced.

(8) The upper end of the pot 40 is covered with a predetermined gap on the distal end tube portion 31A of the guide tube 31 of the feeder / preheating means 30, while the inside of the pot 40 is provided at the upper end. Although the inert gas is supplied from the nozzle 43, the inert gas does not leak because the gas shield ring 42 is provided at the upper end of the pot 40.

(9) Since the inside of the funnel 61 is always filled with the inert gas, the oxidation of the molten metal is reduced, and the running out of hot water at the time of supplying hot water to the injection sleeve 1 is improved. In addition, the cleanliness of the molten metal is increased. (10) Since an inert gas is always supplied into the hopper 25, the granular metal material charged into the hopper 25 is fed and preheated by the feeder / preheating means 30 and then sent to the pot 40. During the period in which the metered amount is metered by the metering means 50 and supplied to the injection sleeve 1, the oxidation of the molten metal can be prevented, and the working environment and safety can be improved. Even when the material is a magnesium alloy, combustion can be prevented.

(11) The inside of the metal material transfer means 20, the pot 40, and the quantitative measurement means 50 constituting the supply device 10
Since all are enclosed spaces and are so-called closed injections, there is no possibility that, for example, generation of gas or the like leaks to the outside, whereby a clean environment can be secured.

(12) The material supply device 10 includes a control unit 70
The control means 70 includes devices such as the pot 40, the supply pipe 45, and the funnel 61, the mass of the molten metal stored in advance therein, and one shot corresponding to the cavity of the mold. With the mass of the molten metal of
The metal material is supplied to the pot 40 by the metal material transfer means 20 from the position of the post-supply level L2 stored in advance, and when the metal material is melted there and reaches the reference level L1, the supply is stopped. , Until the molten metal at the reference level L1 reaches the level L2 after the supply of one shot by the quantitative measuring means 50 including the load cells 53 and 54.
The electromagnetic pump 60 is driven to supply one shot of molten metal to the hot water supply port 2 of the injection sleeve 1, and thereafter, the supply of the material by the electromagnetic pump 60 can be stopped. Therefore, since a series of operations can be automatically executed, the burden on the operator can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. Metal material supply device 1 of the first embodiment
Although the molten metal supply unit 60 of the present embodiment is configured to include an electromagnetic pump,
This is a molten metal supply means 80 provided with a piston pump 85 instead of the electromagnetic pump. Therefore,
Only portions different from the first embodiment will be described in detail, and other portions will be denoted by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted or simplified.

The cylinder 95 serving as a hot water supply pipe provided in the pot 40 has a bulging portion, which bulges only downward, for example, at its base end (connection portion with the pot 40) as compared with other portions. 95A, and the bulging portion 95A is formed to extend a predetermined dimension from the base end to the tip end. On the other hand, in the cylinder 95, a piston rod 85A constituting the piston pump 85 and a piston 85B connected to the piston rod 85A are provided.
Are connected to the linear actuator 86. Also,
The linear actuator 86 is connected to the control means 70.

The piston 85B is adapted to be fitted to a portion other than the bulging portion 95A of the cylinder 95. Therefore, when located inside the bulging portion 95A, a gap S is formed between a part of the outer periphery of the piston 85B and the bulging portion 95A. The molten metal enters the cylinder 95. When the molten metal is supplied into the cylinder 95 up to the reference level L1, the linear actuator 8
6 by moving the piston rod 85A to the linear actuator 86 side, the piston 85B
Fits into the other portion from the bulging portion 95A, whereby the molten metal in the cylinder 95 is supplied to the injection sleeve 1 via the funnel 61. Note that the molten metal supply means 80 is also a target of measurement by the quantitative measurement means 50.

The control means 170 of the second embodiment has almost the same function as the control means 70 of the first embodiment.
However, in the first embodiment, the electromagnetic pump 60 is driven to
The difference is that the piston pump 85 is driven instead of supplying the metal material to the hot water supply port 2 of the injection sleeve 1 until the shot metal is obtained.

Next, the operation of the second embodiment will be described.
In the first embodiment and the second embodiment, as described above,
Since there is only a difference between the electromagnetic pump 60 and the piston pump 85, the flowchart is also different only in parts related thereto. Therefore, the second embodiment is also based on the flowchart of FIG.

In the second embodiment, (ST1) to (ST1)
Up to 1), the flow is the same as in the first embodiment,
In (ST12), (the operation of the piston pump 85 is started)
From there, the flow is the same as that of the first embodiment up to (ST14). In (ST15), (confirmation that the piston pump 85 has reached the stop command value) is performed by the control means 70, and in (ST16), (Stop the piston pump 85)
After (ST17), the flow is the same as in the first embodiment.

According to the above embodiment, (3)
It has the same effect as (1) to (12) except for (4). In particular, instead of the electromagnetic pump 60 of the first embodiment, the piston pump 8
5 and a high accuracy (for example, ± 0.1% or less) load cell, the following high hot water supply accuracy can be obtained. For example, the sum of the mass of the pot 40, the cylinder (hot water supply pipe 95) and the like and the mass of the molten metal therein is 24 kg (24000 g), and when the molten metal reaches the reference level L1, the mass is 6 kg (6000).
g), when the hot water supply amount is 3 kg (3000 g) and the accuracy of the measuring device is ± 0.1%, the total mass is 24 kg (240 g).
00g) and 6kg (6000g), totaling 30kg
(30000 g), and the accuracy of hot water supply under such conditions is calculated as: hot water supply accuracy = ± (30000 × 0.1 × 10 ⁻² / 300)
0) × 100 = ± 1%, and a high accuracy of a hot water supply error of 30 g can be obtained.

It should be noted that the present invention is not limited to the above embodiments, but may be other embodiments as long as the object of the present invention can be achieved. For example, in each of the above embodiments, the hopper 25 and the feeder / preheating means 30 are used as the metal material transferring means 20, but the present invention is not limited to this. The point is that any structure may be used as long as the metal material can be supplied into the pot 40. For example, the molten metal in the melting furnace may be supplied by being pumped out or the like. Means for supplying the liquid into the pot 40 may be used.

Further, in each of the above embodiments, the quantitative lightening means 50 is configured to include the two sets of load cells 53 and 54. However, the present invention is not limited to this, and three or more load cells may be used. Further, in each of the above-described embodiments, the pot 40 is formed in the shape of a bottomed round tube, but is not limited thereto.
For example, it may be formed in a square tube shape.

Further, in the second embodiment, the bulging portion 95A is formed only below the base end of the cylinder 95.
The bulged portion 95A may be formed only on the upper side of the cylinder 95 or only on one of the left and right lateral sides. In short,
With a part fitted to the cylinder 95, the piston 85B
It is sufficient that there is a gap through which the molten metal in the pot 40 can flow.

[0056]

According to the apparatus for supplying a metal material to a casting machine of the present invention, the metal material supplied from the metal material transfer means is:
The molten metal is melted in the molten metal storage pot to become molten metal, and is supplied from the molten metal storage pot to the hot water supply port of the injection sleeve via the hot water supply pipe. At this time, the mass of the molten metal storage pot, the hot water supply pipe and the devices attached thereto, and the entire mass including the molten metal inside the molten metal storage pot and the hot water supply pipe are measured by the mass measuring means. It is not affected by changes in area, changes in gas pressure in the mold cavity, voltage fluctuations, and the like. Therefore, the accuracy of hot water supply can be improved.

Further, since the molten metal storage pot only needs to store at least one shot or more, a relatively small molten metal storage pot can be used, and a large-volume holding furnace and a melting furnace are not required. In addition, there is no particular problem even if the molten metal remaining in the molten metal storage pot is mixed with the molten metal supplied next, whereby the cleanliness of the molten metal can be ensured. Furthermore, since the molten metal in the molten metal storage pot can be directly supplied from the hot water supply pipe, the temperature of the molten metal can be controlled by controlling the temperature of the molten metal in the molten metal storage pot. Control becomes easy.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an apparatus for supplying a metal material to a casting machine according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is an overall configuration diagram showing an apparatus for supplying a metal material to a casting machine according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Injection sleeve 2 Hot water supply port 10, 100 Metal material supply device to casting machine 20 Metal material transfer means 25 Hopper constituting metal material transfer means 30 Feeder and preheating means constituting metal material transfer means 40 Molten metal storage pot 45 Hot water supply Pipe 50 Mass measuring means 53, 54 Load cell constituting quantitative metering means 60 Molten metal supply means (electromagnetic pump) 65 Core part constituting electromagnetic pump 66 Coil part constituting electromagnetic pump 70, 170 Control means 80 Molten metal supply means 85 piston pump constituting molten metal supply means 85A piston rod 85B piston 86 linear actuator constituting molten metal supply means 95 cylinder serving as hot water supply pipe

Claims (6)

[Claims] An apparatus for supplying a metal material to a casting machine for dissolving, quantifying and metering a metal material and supplying the molten metal to a hot water supply port of an injection sleeve connected to a mold cavity, wherein the metal material is supplied to supply the metal material. Means, a molten metal storage pot for dissolving the metal material supplied from the metal material transfer means and forming a molten metal therein for at least one shot or more, and between the molten metal storage pot and the injection sleeve. A hot water supply pipe provided for storing the molten metal; a molten metal storage pot, a hot water supply pipe and a device attached thereto; and a mass measuring means for measuring the mass of the molten metal inside the molten metal storage pot and the hot water supply pipe. Molten metal supply means for supplying the molten metal in the molten metal storage pot to the hot water supply port side of the injection sleeve; and, based on a signal from the mass measuring means. Metallic material supply apparatus to the casting machine, characterized in that it is configured with a control means for controlling driving of the molten metal feed means Te. 2. The apparatus for supplying a metal material to a casting machine according to claim 1, wherein said metal material transfer means includes a feed and preheating means for preheating while feeding a granular metal material charged into a hopper. A metal material supply device for a casting machine. 3. The apparatus for supplying a metal material to a casting machine according to claim 1, wherein the mass measuring means includes:
An apparatus for supplying metal material to a casting machine, comprising: a plurality of load cells. 4. The apparatus for supplying a metal material to a casting machine according to claim 1, wherein said molten metal supply means is constituted by an electromagnetic pump. Metal material supply equipment. 5. The metal material supply apparatus for a casting machine according to claim 4, wherein the coil portion of the electromagnetic pump is provided in a non-contact state with the molten metal storage pot and the hot water supply pipe. Metal material supply device to the casting machine. 6. The casting machine according to claim 1, wherein said molten metal supply means is constituted by a piston pump. Metal material supply equipment.