JP3193143U - Die casting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To advantageously avoid sprinkling of molten metal on a bead dispenser so that damage to the bead dispenser can be effectively prevented, and the certainty of such control is advantageous. Provided is a die casting device configured to be enhanced. SOLUTION: A die casting machine 12 for performing die casting; a pouring machine 16 for pouring molten metal contained in a radle 50; and a bead dispenser including a shuttle 56 for pouring beads 18 into a sleeve 14 at an advancing position. In the die casting device 10 including 20, the first detection means 22, the second detection means 24, and the control means 26 for controlling the operation of the ruddle 50 based on the signals input from the detection means. While the control means 26 detects the state in which the shuttle 56 is present in the forward position, the control means 26 disables the pouring operation of the ruddle 50 with respect to the pouring machine 16. Was configured to do. [Selection diagram] Fig. 1

Description

  The present invention relates to a die casting apparatus, and more particularly, to a die casting apparatus configured to advantageously prevent damage to a bead dispenser for feeding solid beads containing a lubricating component into a molten metal supply sleeve.

  Conventionally, a die casting method is well known as one of methods for casting a precise casting (metal casting). A cold chamber which is one of casting apparatuses used in such a die casting method. In a die casting machine of the type, after a predetermined amount of molten metal such as aluminum pumped by a ladle is supplied to a sleeve (also called a shot sleeve) for each casting cycle, the molten metal in the sleeve Is injected into the molding cavity of the mold at a high speed and a high pressure by a plunger (also called a shot piston or a chip), whereby a target cast product is molded.

  By the way, in such a cold chamber type die casting machine, various lubricants are used for lubricating the sleeve and the plunger, and a predetermined amount thereof is supplied into the sleeve every casting (molding) cycle. However, among them, in recent years, pellet-shaped solid lubricants (beads) are increasingly used because they are easy to handle and preferable in the working environment.

  And in order to supply such a pellet-form solid lubricant in a sleeve, the following pellet supply apparatuses are proposed by JP, 2012-110924, A (patent documents 1). That is, a discharge pipe for conveying a predetermined amount of pellets (beads) by air is provided so as to be able to reciprocate between a retracted position and an advanced position, while a cylindrical air permeability is provided at the tip of the discharge pipe. A cover member made of a porous member is provided, and its peripheral wall is structured to have a group of air holes that allow passage of air but prevent passage of pellets. In the state where the pipe is moved to the forward movement position, it is configured to be positioned above the portion to be supplied (the molten metal supply port of the sleeve). For this reason, the pellets are ejected from the tip opening of the discharge pipe by the carrier air. However, because of the presence of such a cover member, it is possible to let the air to be ejected to the outside from the vent hole of the peripheral wall. Certainly can be supplied to the supply portion, than Te, or variations in the supply amount of the pellets, it is to be able to avoid problems such pellets scattered around the feed unit.

  In addition, in such a pellet supply apparatus, a series of pellet supply cycles including the movement of the discharge pipe to the forward position, the conveyance of a predetermined amount of pellets by air, and the return of the discharge pipe to the retracted position are completed. Then, as a part of the molding cycle of the die casting machine, a configuration is adopted in which the molten metal is supplied to the molten metal supply port (supplied part) of the sleeve. For this reason, the die casting machine and the pellet supply device are used by the controller and sequencer. The operation of is controlled.

  However, in a die casting apparatus having such a conventionally proposed pellet supply apparatus, a ladle for storing molten metal and a pellet discharge section (above the molten metal supply port of the sleeve which is a pellet supply section ( The flow line with the discharge pipe and the cover member) is overlapped or very close, so that, for example, some trouble occurs in the die casting machine and the pellet supply device, and the operator If the pellet feeder is operated manually, the ladle and the pellet discharge section may interfere (collision) or the molten metal may be sprinkled on the pellet discharge section. As a result, a problem that the device is damaged is caused.

  Further, in order to solve such a problem, in a part of the die casting apparatus currently in operation, the ladle and the pellet discharge unit are not simultaneously present (approached) above the molten metal supply port of the sleeve. As described above, control is also performed such that a step of waiting the ladle at a position away from the molten metal supply port of the sleeve is incorporated in the operation cycle of the ladle for a predetermined time or during the pellet supply cycle. However, even in such a case, problems due to inappropriate operations such as when trouble occurs (during manual operation) are inherent, and further, when supplying molten metal after the standby process In addition, since it is necessary to move the ladle to above the molten metal supply port, there is another problem that the molding cycle time is extended correspondingly and the productivity of the entire die casting apparatus is lowered. .

JP 2012-110924 A

  Here, the present invention has been made in the background of such circumstances, and the problem to be solved is that the bead dispenser advantageously avoids the molten metal being sprinkled on the bead dispenser. It is an object of the present invention to provide a die-casting device which is controlled so that damage can be effectively prevented, and configured so that the certainty of such control can be advantageously increased.

  In the present invention, in order to solve the above-described problems, the molten metal supplied through the pouring port provided in the molten metal supply sleeve is press-fitted into the molding cavity of the mold, A die-casting machine for performing die-casting of a cast product to be performed; between a position where the molten metal is drawn from a position where the ladle containing the molten metal is separated from the molten metal supply sleeve and a position where the molten metal is poured with respect to the pouring port A pouring machine for moving and pouring the molten metal in the ladle at the pumping position and pouring the molten metal accommodated in the ladle at the pouring position into the pouring port of the molten metal supply sleeve A bead discharge section capable of discharging solid beads containing a lubricating component, and a forward position for feeding the beads into the melt supply sleeve from the bead discharge section; A die casting apparatus comprising a bead dispenser including a shuttle that is reciprocally movable between a retreat position that separates the discharge portion from the molten metal supply sleeve, and detects that the shuttle is in the advance position. First detection means for outputting a forward position detection signal, second detection means for detecting that the shuttle is in the reverse position and outputting a reverse position detection signal, and the output forward position detection signal Control means for controlling the operation of the ladle in the pouring machine based on the input forward position detection signal and reverse position detection signal, respectively. While the control means detects that the shuttle is in the forward position, the pouring operation of the ladle is performed on the pouring machine. The die casting apparatus characterized that it is thus performs a control to disable, is to its basic structure.

  In addition, according to one of desirable aspects of the die casting apparatus according to the present invention, in the state where the control means is performing control to disable the ladle pouring operation, the control means includes the When the state in which the shuttle is in the forward position and the state in which the shuttle is in the reverse position is detected in this order, the control for disabling the pouring operation of the ladle is terminated, and the ladle is The control which enables execution of the hot water pouring operation is performed.

  Further, in the present invention, a space is provided between the shuttle at the forward position and the ladle at the pouring position above the pouring port, and the shuttle and the ladle It is desirable to avoid such interference.

  In the present invention, the die casting machine and the bead dispenser are connected via the control means or other control means, and the bead supply signal output from the die casting machine is the control means or The forward movement position of the shuttle in the retracted position with respect to the bead dispenser is controlled by the input of the bead supply signal. A die-casting device that performs control for starting movement toward is regarded as one of the advantageous objects.

  In addition, according to another preferred embodiment of the die casting apparatus according to the present invention, the ladle is moved to the pouring position and waits in a state where the ladle accommodates the molten metal. However, it is controlled by the control means or by another control means.

  As described above, in the die casting apparatus according to the present invention, the ladle pouring operation is performed on the pouring machine while the control means detects the state where the shuttle is in the forward position. Therefore, it is advantageously avoided that the molten metal is sprinkled on the shuttle in the forward position, and damage to the shuttle can be advantageously prevented. It will be.

  In addition, the die casting apparatus according to the present invention has two detection means called first and second detection means, and the control means outputs the advance position output from the first and second detection means. Based on the detection signal and the reverse position detection signal, the state where the shuttle is present at the forward position is detected and the above control is performed. Therefore, the control means detects the state of the shuttle more reliably. Therefore, the reliability of such control can be advantageously increased.

It is explanatory drawing which shows an example of the die-casting apparatus according to this invention, Comprising: It is B direction arrow partial sectional explanatory drawing in FIG. It is AA sectional explanatory drawing in FIG. 1, Comprising: Only the structure regarding a die-casting machine is shown. It is an enlarged partial sectional explanatory view corresponding to Drawing 1 for explaining operation of a ladle in a pouring machine, (a) shows a state where a ladle is in a drawing position, (b) The state where the ladle is in the pouring position is shown. It is a fragmentary sectional view corresponding to (b) of Drawing 3, and shows the state where the ladle is made to perform pouring operation. FIG. 2 is an enlarged partial cross-sectional explanatory view corresponding to FIG. 1 for explaining the operation of the shuttle in the bead dispenser, in which (a) shows a state where the shuttle is in a retracted position, and (b) shows the shuttle. Is a state in which is in the forward movement position. FIG. 6B is an enlarged explanatory view of a portion C in FIG. 5B, schematically showing a state in which beads are introduced from a bead dispenser into a sleeve. It is explanatory drawing for showing the positional relationship of a ladle and a shuttle above a pouring gate.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 shows an example of a die casting apparatus according to the present invention. The die casting apparatus 10 includes a die casting machine 12 for performing die casting of a target casting product, and a pouring machine 16 for pouring a molten metal into the molten metal supply sleeve 14 of the die casting machine 12. A bead dispenser 20 for feeding solid beads (18) containing a lubricating component into the molten metal supply sleeve 14 is provided. Further, the die casting apparatus 10 includes auto switches 22 and 24 as first and second detection means and a controller 26 as control means. The controller 26 includes the die casting machine 12 and the pouring machine 16. , Bead dispenser 20 and auto switches 22 and 24, respectively. The auto switches 22 and 24 used in the present embodiment are a kind of non-contact type magnetic proximity switch, and are a predetermined detector [here, a piston that moves with the driving of an air cylinder (64) described later] When the magnet ring (not shown) attached to the device enters the detection range, the contact of the accommodated electric circuit is switched, and a predetermined signal is output to the controller 26.

  The die casting machine 12 used here is a cold chamber type die casting machine having the same basic structure as that of the prior art. Specifically, as shown in FIG. 2, a fixed platen 28 and a movable platen 30 are used. In addition, the attached molds (fixed mold 32 and movable mold 34) are clamped by a clamping cylinder 36, whereby a predetermined molding cavity 38 is formed between them. Yes. Such a molding cavity 38 communicates with the molten metal supply sleeve 14 (hereinafter simply referred to as the sleeve 14) through the runner and the gate. The sleeve 14 has a thick cylindrical shape, and a pouring port 40 having a substantially rectangular hole shape in plan view that opens to the outside through the upper side portion behind the fixed platen 28 (on the right side in FIG. 2). Is formed. Furthermore, a plunger 42 is disposed in the sleeve 14, and an injection cylinder 44 for reciprocating the plunger 42 is disposed behind the plunger 42.

  In addition, the die casting machine 12 is provided with an air blow pipe 46. The air blow pipe 46 is a pipe made of a metal such as copper, and is connected to a compressor or the like (not shown), and its tip (lower end) extends to the pouring port 40 of the sleeve 14. And by blowing out compressed air at a preset timing, fine burrs and the like remaining in the sleeve 14 can be removed between casting (molding) cycles, and the inside of the sleeve 14 can be cleaned. It has become.

  Further, as shown in FIGS. 3A and 3B, the hot water pouring machine 16 is disposed in the vicinity of the die casting machine 12 at a position separated from the sleeve 14, and the molten metal to be die cast is provided. The ladle 50 accommodated therein and a ladle 50 having a handle shape are provided, and the ladle 50 can be moved between a pumping position and a pouring position by a robot arm 52.

  Specifically, FIG. 3A shows a state in which the ladle 50 is in the pumping position, and here, the ladle 50 is pumped, so that a predetermined amount of molten metal is formed. It is drawn from the ladle 48 and stored in the ladle 50. On the other hand, FIG. 3 (b) shows a state in which the ladle 50 is in the pouring position above the pouring port 40. Here, the ladle 50 is poured into the ladle 50 by pouring operation. The accommodated molten metal is supplied into the sleeve 14 through the pouring port 40. As shown in FIG. 4, the pouring operation is performed by tilting the ladle 50 in which the molten metal is accommodated toward the pouring port 40 (see the thin line arrow in FIG. 4). Then, the molten metal thus injected into the sleeve 14 is injected (press-fitted) into the molding cavity 38 at a high speed and a high pressure by the plunger 42, thereby forming a target cast product. It is like that.

  By the way, in such a die casting apparatus 10, beads 18 that are solid lubricants are supplied (injected) into the sleeve 14 for each casting cycle for lubrication between the sleeve 14 and the plunger 42. It is like that. Examples of the beads 18 used here include, for example, various types of known pellet-shaped solid lubricants that are commercially available, which are obtained by granulating a mixture of wax and graphite. For example, shot beads (SHOTBEADS) (registered trademark: manufactured by J & S Chemical Co., Ltd.) are used as appropriate, and beads 18 having a size of about 0.3 mm to 3 mm are generally used. It becomes.

  The bead dispenser 20 for loading the beads 18 into the sleeve 14 includes a bead weighing device 54 and a shuttle 56 (bead loading device) as shown in FIGS. 5 (a) and 5 (b). The bead weighing device 54 and a shuttle 56 (a transfer pipe 58 described later) are connected via a flexible tube 60 having flexibility. Therefore, since the bead weighing device 54 has a basic structure similar to that of the prior art, a detailed description thereof will be omitted here. A predetermined amount of beads 18 required for lubrication between the sleeve 14 and the plunger 42 are weighed, and the beads 18 are fed toward the shuttle 56 through the flexible tube 60 by the carrier air supplied from an air source (not shown). It is designed to be transported.

  Here, the shuttle 56 is a metal pipe-shaped transfer pipe 58 that guides the beads 18 conveyed by the transfer air, and a bead discharge that is connected to the tip of the transfer pipe 58 and has a rectangular hollow block shape as a whole. The position 62 is fixed to a stationary platen 28 that is a stationary member of the die casting machine 12 by a fixed angle 66 that integrally extends from the air cylinder 64. Is attached. The transfer pipe 58 is fixedly held with respect to the clamp member 68 that can move together with the driving of the air cylinder 64, so that the shuttle 56 moves forward and backward as the air cylinder 64 is driven. It is possible to reciprocate between positions. In the figure, reference numeral 70 denotes a guide member that is fixedly provided to the non-movable portion of the air cylinder 64 and guides the movement of the transfer pipe 58.

  Specifically, FIG. 5A shows a state in which the shuttle 56 is in the retreat position (retreat limit). Here, the air cylinder 64 is moved rearward (to the right in FIG. 5A) side, and the bead discharge section 62 is positioned at a position separated from the sleeve 14. In this state where the shuttle 56 is in the retracted position, the above-described detection body (not shown) is positioned within the detection range of the auto switch 24. Thereby, the contact of the electric circuit accommodated in the auto switch 24 is switched, and a predetermined signal (reverse position detection signal) is output to the controller 26. Here, in this way, when the auto switch 24 detects that the shuttle 56 is in the retracted position, the confirmation lamp 71 is turned on. Can be seen from.

  On the other hand, FIG. 5B shows a state where the shuttle 56 is in the forward movement position (forward movement limit). Here, the air cylinder 64 is moved forward (to the left in FIG. 5B) side, and the bead discharge part 62 is positioned above the pouring port 40 of the sleeve 14. In this state where the shuttle 56 is in the forward position, the above-described detection body (not shown) is positioned within the detection range of the auto switch 22. Thereby, the contact of the electric circuit accommodated in the auto switch 22 is switched, and a predetermined signal (advance position detection signal) is output toward the controller 26. As in the case of the auto switch 24 described above, also in the auto switch 22, when it is detected that the shuttle 56 is in the forward movement position, the confirmation lamp 72 is turned on, and this detection state is changed. Visible from the outside. Then, the beads 18 are thrown into the sleeve 14 in such a state that the shuttle 56 is in the advanced position.

  Here, the tip side portion of the shuttle 56 used in the present embodiment has a structure as shown in FIG. 6, and the beads 18 are charged in the following manner. . That is, the beads 18 that have been delivered from the bead metering device 54 and have been carried by the carrier air in the transfer pipe 58 are ejected from the tip opening of the transfer pipe 58 toward the internal space of the bead discharge section 62 ( (See the white arrow in FIG. 6). In this case, a large number of air holes 73 are formed on the side wall surface (the left wall surface in FIG. 6) and the upper wall surface of the bead discharge unit 62 facing the front end opening of the transfer tube 58, and are ejected from the transfer tube 58. Among the transported air and the beads 18, at least a part of the transported air passes through the vent hole 73 and is discharged to the outside of the bead discharge unit 62 (see the thin arrow in FIG. 6). On the other hand, since the vent hole 73 is formed to have an opening size smaller than the particle size of the bead 18, the bead 18 cannot pass through the vent hole 73, and its own weight or bead discharge unit 62 is not allowed. The beads 18 are dropped downward by the flow of the carrier air remaining inside, and the falling beads 18 are introduced from the discharge port 74 provided on the lower wall surface of the bead discharge unit 62 toward the pouring port 40 of the sleeve 14. (See the white two-dot chain arrow in FIG. 6).

  As shown in FIG. 7, a spatial interval is provided between the shuttle 56 (bead discharge portion 62) in the forward position and the ladle 50 in the pouring position above the pouring port 40. Thus, both the shuttle 56 and the ladle 50 are prevented from directly interfering (collision) with each other only by moving above the pouring port 40 (advance position and pouring position).

  The casting cycle in the die casting apparatus 10 having such a configuration will be briefly described as follows. That is, first, the shuttle 56 is moved to the forward movement position, and the beads 18 are put into the sleeve 14. Here, while the shuttle 56 exists in the forward movement position, that is, based on the signals output from the two auto switches 22 and 24, the controller 26 detects the state where the shuttle 56 exists in the forward movement position. During this time, the controller 26 controls the pouring machine 16 to disable the pouring operation of the ladle 50. Next, when the shuttle 56 is moved to the retracted position, the controller 26 detects that the shuttle 56 is in the retracted position, and the control for disabling the pouring operation of the ladle 50 is finished, The pouring operation of the ladle 50 moved to the hot water position is performed, and the molten metal is supplied into the sleeve 14. Then, the molten metal supplied into the sleeve 14 is injected into the molding cavities 38 of the molds 32 and 34 by the plunger 42, and the target cast product is molded. Thereafter, compressed air is blown from the air blow pipe 46 to the sleeve 14 to clean the inside of the sleeve 14. Here, in this embodiment, when the cleaning of the sleeve 14 by air blow is completed, a signal (bead supply signal) for starting the supply of the beads 18 is output from the die casting machine 12 and input to the controller 26. It is like that. As a result, the bead dispenser 20 is again controlled to start the movement toward the forward position of the shuttle 56, and thereafter, as described above, including the step of loading the beads 18 into the sleeve 14. The process (casting cycle) will be repeated.

  By the way, in the die-casting apparatus 10 according to this embodiment, the controller 26 performs control to disable the pouring operation of the ladle 50 with respect to the pouring machine 16 under the preset conditions. The shuttle 56 can be advantageously prevented from being damaged, and has such a great feature that such control is performed based on signals output from the two auto switches 22, 24. It is.

  For example, the state in which the auto switch 22 and the auto switch 24 are outputting signals (forward position detection signal and reverse position detection signal) is set to the ON state, and the state in which such a signal is not output is set to the OFF state. Table 1 below shows an example of the detection result (determination) of the state of the shuttle 56 and the feasibility control of the pouring operation of the ladle 50 by 26 (control means). That is, here, when the auto switch 22 is ON and the auto switch 24 is OFF, the controller 26 detects that the shuttle 56 is in the forward position, and On the other hand, control is performed so as not to perform the pouring operation of the ladle 50.

  Further, since the die casting apparatus 10 includes the two auto switches 22 and 24, the controller 26 detects the state of the shuttle 56 in more detail, and controls the pouring machine 16 based on the detection result. Can be implemented in more detail. Specifically, for example, when both the auto switches 22 and 24 are turned off after detecting the state in which the shuttle 56 exists at the reverse position, the shuttle 56 is moving toward the forward position. On the other hand, when both the auto switches 22 and 24 are turned off after detecting the state where the shuttle 56 exists at the forward position, it is detected that the shuttle 56 is moving toward the backward position. Based on the detection result, the controller 26 can also perform control as shown in Table 2 below.

  As is apparent from the above description, in the present embodiment, the controller 26 at least supplies the ladle 50 to the pouring machine 16 while detecting the state in which the shuttle 56 is present at the forward movement position. Since the control that disables the hot water operation is performed, the malfunction of each component (the pouring machine 16, the bead dispenser 20, etc.) of the die casting apparatus 10 and the processes (operations) occurring between them. ) Or an erroneous operation related to the manual operation of the operator, the situation where the molten metal is sprinkled on the shuttle 56 in the forward position is avoided, and damage to the shuttle 56 can be advantageously prevented. It will be.

  In addition, the die casting apparatus 10 has two auto switches 22 and 24, and the controller 26 determines the shuttle 56 based on the forward position detection signal and the reverse position detection signal output from the auto switches 22 and 24. Since the state is detected and the pouring machine 16 is controlled, the shuttle 56 is compared with a configuration in which the state of the shuttle 56 is detected only by a signal output from one auto switch. This state can be detected more reliably and in detail, and thus the reliability of such control can be advantageously increased.

  In particular, since the respective signals output from the two auto switches 22 and 24 are used to detect the state in which the shuttle 56 in the reverse position is moving toward the forward position as described above. By controlling the pouring machine 16 so as not to perform the pouring operation of the ladle 50 (see Table 2), it is possible to more reliably prevent the molten metal from being sprinkled on the shuttle 56. Will be able to.

  Further, in this embodiment, after the state where the shuttle 56 exists in the forward movement position is detected, that is, after the beads 18 are inserted into the sleeve 14, the shuttle 56 further returns to the backward movement position. When this is detected, the control for disabling the pouring operation of the ladle 50 is terminated, and the pouring operation of the ladle 50 is performed. Therefore, it is possible to more reliably prevent damage to the shuttle 56 (bead dispenser 20), and advantageously prevent the molten metal from being supplied into the sleeve 14 when the beads 18 are not charged. Is also possible. Moreover, even when one or both of the auto switches 22 and 24 break down during operation of the die casting apparatus 10, the state where the shuttle 56 exists in the forward position and the shuttle 56 exists in the backward position. Unless the two states, i.e., the states to be performed, are detected in this order, the control that disables the pouring operation of the ladle 50 is not terminated (released). Thus, the worst situation of damage can be avoided more advantageously.

  Here, the auto switch 22 is used as a first detection unit for detecting that the shuttle 56 is in the forward position and a second detection unit for detecting that the shuttle 56 is in the reverse position. , 24 is used, and the position of the shuttle 56 can be detected in a non-contact manner by the position detection mechanism provided in the auto switches 22, 24. For this reason, it has high durability against repeated reciprocation of the shuttle 56, and the reliability of control in the die casting apparatus 10 can be advantageously increased.

  In the present embodiment, a bead supply signal is output from the die casting machine 12 after the cleaning process in the sleeve 14 by air blow is completed, and this bead supply signal is input to the controller 26. In response to the input of the bead supply signal, the controller 26 controls the bead dispenser 20 to start the movement toward the advance position of the shuttle 56. The casting operation of the series of beads 18 starting from the movement can be started at an appropriate timing, and the casting cycle can be efficiently performed. Further, this prevents the shuttle 56 (bead discharge portion 62) from being in a high temperature sleeve 14 so as to avoid a state where the shuttle 56 waits in the forward position until the die casting machine 12 is ready to insert the beads 18. Therefore, the time taken for the shuttle 56 to overheat, for example, the problem that the beads 18 are dissolved in the bead discharge section 62, or the shuttle 56 is subjected to thermal stress. Problems and the like caused by repeated receiving can be advantageously solved.

  Furthermore, since the positional relationship between the shuttle 56 at the forward movement position and the ladle 50 at the pouring position is configured so that a spatial interval is provided between them, above the pouring port 40, The shuttle 56 (bead discharge unit 62) and the ladle 50 can exist together without interference (collision). That is, the ladle 50 can freely move between the pumping position and the pouring position regardless of the operation (position) of the shuttle 56.

  According to such a configuration, particularly when the cycle time (time required for one casting cycle) is relatively short, the ladle 50 is moved to the pouring position in a state where the molten metal is accommodated, When the pouring operation of the ladle 50 is enabled by controlling the pouring machine 16 so as to wait, it is not necessary to move the ladle 50 to the pouring position again, and the pouring is quickly performed. The operation can be performed. Therefore, it is possible to efficiently shorten the casting cycle time and improve the productivity, thereby advantageously reducing the manufacturing cost of the target cast product.

  The exemplary embodiments of the present invention have been described in detail above. However, the embodiments are merely examples, and the present invention is limited in any way by specific descriptions according to such embodiments. It should be understood that it is not interpreted.

  For example, in the die-casting apparatus 10, abnormalities of signals input from the two auto switches 22 and 24 (for example, signals are simultaneously input from both the auto switches 22 and 24, or only the reverse position detection signal is repeatedly input. From the casting cycle and the die casting apparatus 10 (for example, the suspicion of the failure of the shuttle 56 and the auto switches 22 and 24, or the possibility that the supply of the beads 18 was not performed as set). A mechanism for notifying the worker can also be provided. This makes it possible to quickly find such an abnormality, so that the reliability of the entire die casting apparatus 10 can be further improved.

  Further, the first and second detection means are not limited to the above-described auto switches (magnetic proximity switches), but are inductive, capacitive, ultrasonic, photoelectric, etc. Other types of non-contact type proximity switches (position detection sensors), contact type switches (sensors) with a mechanical position detection mechanism such as limit switches, micro switches, or small detection switches can also be used. It is. Here, for example, when limit switches are used as the first and second detection means 22 and 24, the structure is relatively simple and inexpensive, which contributes to a reduction in the cost of the die casting apparatus 10 as a whole. Since discovery and repair are easy, there exists an advantage that the running cost concerning operation | movement of the die-casting apparatus 10 can be reduced advantageously. Furthermore, since the electric circuit for outputting signals (forward position detection signal and reverse position detection signal) is protected by a metal or resin casing (case), temperature, vibration, water, oil, and High environmental resistance and mechanical resistance against dust and the like are advantageously imparted.

  In addition, as a signal output from the auto switches 22 and 24 for detecting the state of the shuttle 56, the auto switch 22 (first detecting means) is combined with the forward position detection signal and the reverse position detection signal as described above. ) Outputs a forward position non-detection signal when it is detected that the shuttle 56 is not in the forward position, and when the auto switch 24 (second detection means) detects that the shuttle 56 is not in the backward position. A reverse position non-detection signal may be output. As a result, the control of the entire die casting apparatus 10 by the control means (controller 26) can be performed more effectively, and failure of the first and second detection means (auto switches 22, 24) can be further ensured. It will be possible to discover.

  Instead of the forward position detection signal and the reverse position detection signal as described above, only such forward position non-detection signal and reverse position non-detection signal can be output from the auto switches 22 and 24. . In that case, in the controller 26, for example, regarding the signal output from the auto switch 22 on the forward position side, the fact that the forward position non-detection signal is not output is replaced with the output of the forward position detection signal. Will be. In short, when the forward position non-detection signal is not output, it is detected that the shuttle 56 is in the forward position.

  The drive source of the shuttle 56 is not limited to the air cylinder 64 as illustrated, and various known drive sources (actuators) can be used. Therefore, the reciprocating movement of the shuttle 56 is not limited to the linear movement as illustrated, and includes a three-dimensional movement by a robot arm or the like.

  Further, the pouring operation of the ladle 50 is not limited to the form in which the ladle 50 is tilted as described above, and various operations can be performed depending on the specifications of the ladle used. In addition, in the pouring machine, the ladle is moved to a predetermined position near the sleeve (pouring port) at a relatively high speed, and decelerated at the predetermined position, thereby suddenly stopping the ladle that has moved at a high speed. In some cases, the ladle is moved at a relatively low speed above the sleeve (pouring port) and the position of the ladle is finely adjusted while preventing the molten metal contained therein from spilling. In this case, the ladle pouring operation is configured including such a fine adjustment (low speed movement) of the position.

  Also, the timing at which the bead supply signal is output from the die casting machine 12 is not limited to the end of the air blowing (sleeve 14 cleaning) process as in the above-described embodiment. Any timing that is appropriate for starting the movement of the shuttle 56 toward the forward position, such as when clamping is completed, may be used. By outputting a bead supply signal from the die casting machine 12 at such timing, the casting operation of the beads 18 (starting movement of the shuttle 56) can be started at an appropriate timing, and the casting cycle can be efficiently performed. I can do it.

  Further, as in the above-described embodiment, the entire die casting apparatus 10 is not controlled by one controller 26 (control means), but a plurality of control means are provided and connected to control the die casting apparatus 10. It is also possible to do this. As such control means, any known control means (apparatus) can be adopted, and for example, a sequencer using ladder logic can be appropriately programmed and used.

  Although not enumerated one by one, the present invention can be implemented in a mode with various changes, modifications, improvements, etc. based on the knowledge of those skilled in the art, and such a mode of implementation is It goes without saying that any one of them belongs to the category of the present invention without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Die casting apparatus 12 Die casting machine 14 Molten metal supply sleeve 16 Pouring machine 20 Bead dispenser 22, 24 Auto switch 26 Controller 40 Pouring port 50 Ladle 52 Robot arm 56 Shuttle 58 Transfer pipe 62 Bead discharge part 64 Air cylinder 68 Clamp member

Claims (5)

A die casting machine that press-fits a molten metal supplied through a pouring port provided in a molten metal supply sleeve into a molding cavity of a mold and performs die casting of a target casting; and a ladle containing the molten metal While moving between the pouring position of the molten metal separated from the molten metal supply sleeve and the pouring position of the molten metal with respect to the pouring port, the molten metal is accommodated in the ladle at the pouring position, A pouring machine for pouring the molten metal accommodated in the ladle into the pouring port of the molten metal supply sleeve at the pouring position; and a bead ejection section capable of ejecting solid beads containing a lubricating component; A forward position at which the beads are introduced into the melt supply sleeve from the bead discharge portion and a retreat position at which the bead discharge portion is separated from the melt supply sleeve. In the die casting apparatus comprising a bead dispenser comprising a shuttle that is movable reciprocally,
First detection means for detecting that the shuttle is in the forward position and outputting a forward position detection signal; and second detection means for detecting that the shuttle is in the reverse position and outputting a reverse position detection signal Detection means, and the output forward position detection signal and reverse position detection signal output are respectively input, and the ladle in the pouring machine is based on the input forward position detection signal and reverse position detection signal. And control means for controlling the operation of the ladle, while the control means detects the state in which the shuttle is present at the forward position, the pouring of the ladle to the pouring machine. A die-casting device characterized in that control is performed so that the pouring operation cannot be performed.   In a state where the control means is performing control to disable the ladle pouring operation, the control means is in a state where the shuttle is in the forward position and in a state where the shuttle is in the reverse position Are detected in this order, the control for disabling execution of the pouring operation of the ladle is terminated, and the control for enabling the pouring operation of the ladle is performed. Item 2. The die casting apparatus according to Item 1.   Above the pouring port, a spatial interval is provided between the shuttle at the forward movement position and the ladle at the pouring position, so that interference between the shuttle and the ladle is avoided. The die casting apparatus according to claim 1 or claim 2.   The die casting machine and the bead dispenser are connected via the control means or other control means, and a bead supply signal output from the die casting machine is input to the control means or other control means. In response to the input of the bead supply signal, the control means or other control means controls the bead dispenser to start moving the shuttle at the retracted position toward the forward position. The die casting apparatus according to any one of claims 1 to 3, wherein the die casting apparatus is configured as described above. The said pouring machine is controlled by the said control means or another control means so that the said ladle is moved to the said pouring position in the state which accommodated the said molten metal, and waits. The die casting apparatus according to any one of claims 1 to 4.

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