JP2015123467A - Device for feeding bead to die cast machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for feeding beads to a die cast machine capable of advantageously avoiding interference with a ladle which supplies molten metal and capable of effectively suppressing or blocking overheating of a supply pipe in a simple mechanism without performing reciprocating movement or the like when feeding the beads of solid lubricant into a molten metal supply sleeve of the die cast machine.SOLUTION: A device for feeding beads is configured such that at least a part of carrying air is separated from beads by means of an air bleeding means 54 and, on the other hand, such beads are fed into a sprue 32 such that the beads are caused to drop downward. Therein, the air bleeding means 54 is provided such that the position is fixed, further, a supply pipe 56 for guiding the beads dropping from the air bleeding means 54 to the sprue 32 is provided such that the position is fixed and, at the same time, a cooling air supply means 58 which supplies cooling air to the supply pipe 56 and circulates such cooling air into the supply pipe 56 so as to be released from a sprue 32 side opening part of the supply pipe 56 is provided.

Description

  The present invention relates to a bead feeding device to a die casting machine, and more particularly, a bead to a die casting machine configured to be able to feed beads, which are solid lubricants, into a pouring port of a molten metal supply sleeve by a simplified mechanism. This is related to the charging device.

  Conventionally, a die casting method is well known as one of methods for casting a precise metal casting. However, there is a cold chamber type die casting machine which is one of casting apparatuses used in such a die casting method. In each casting cycle, a predetermined amount of molten metal such as aluminum pumped by a ladle is supplied to a sleeve (also referred to as a shot sleeve), and then the molten metal in the sleeve is moved to a plunger (shot piston or The target metal casting is molded by injection at a high speed and high pressure into the molding cavity of the mold.

  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 front end 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. Can be supplied quite to the supply unit, more 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 in which the molten metal is supplied to the molten metal supply port (supplied part) of the sleeve is adopted. For this purpose, the molding operation and the mold of the die casting machine are performed by the controller and the sequencer. In addition to the tightening operation and the like, the operation of the pellet supply device is controlled.

  However, in such a conventionally proposed pellet supply apparatus, a relatively large cylindrical cover member having a pellet discharge port is disposed at the tip of a discharge pipe that is reciprocally moved. The flow line between the ladle containing the molten metal and the pellet discharge part (discharge pipe and cover member) overlaps above the molten metal supply port of the sleeve, which is the pellet supply part, so that they interfere with each other. It is necessary to accurately control the operation of the ladle and the pellet discharge unit so that, for example, when some trouble occurs in the pellet supply device and the operator manually operates the pellet supply device, it is inappropriate. If the operation is performed properly, the ladle and the pellet discharge part may interfere (collision), or the molten metal may be sprinkled on the pellet discharge part. Te, so that problems such device is damaged is induced.

  Further, in order to reciprocate the discharge pipe, a drive source (actuator) is required. By arranging such a drive source, the pellet feeder itself increases in size and cost, and further, the sleeve. In addition to causing the problem of a complicated arrangement structure around the molten metal supply port, programming is also required to achieve consistency between the operation of the pellet supply apparatus and the operation of the die casting machine. However, the problem that the effort and the cost for it generate | occur | produce is also inherent.

  In the pellet supply apparatus having such a structure, returning (moving) the discharge pipe for supplying the pellets to the retracted position is not limited to avoiding interference with the ladle. It also has the purpose of preventing overheating due to the heat of the molten metal. Otherwise, the discharge pipe and the cover member are heated by the heat of the sleeve and the inner surface thereof has a melting point of the pellet. If the temperature becomes higher than that, the supplied pellets are welded, and there is a problem that it becomes difficult to supply a predetermined amount of the pellets. As a result, the problem that the supply of pellets becomes impossible arises.

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 when the beads, which are solid lubricants, are charged into the molten metal supply sleeve of the die casting machine, It is possible to advantageously avoid interference with a ladle that supplies molten metal with a simple mechanism without reciprocating each member for charging, etc., and to effectively suppress or prevent overheating of the supply pipe. It is an object of the present invention to provide a bead charging device for a die casting machine that can be used.

  In the present invention, in order to solve the above-described problems, the solid beads conveyed by the carrier air in the transfer pipe are guided to the air venting means, and at least a part of the carrier air is removed from the beads. In the bead charging device, the air venting means is configured such that the beads are allowed to drop downward and are poured into a pouring port that opens to the outside of the metal melt supply sleeve of the die casting machine. And a supply pipe for guiding the falling beads from the air venting means to the pouring port of the molten metal supply sleeve, and supplying cooling air to the supply pipe. A die casting machine comprising cooling air supply means for allowing the cooling air to be vented into the supply pipe so as to be discharged from the pouring opening side opening of the supply pipe. Beads dosing device to emissions, is to its basic structure.

  In addition, according to one of the desirable embodiments of the bead feeding apparatus to the die casting machine according to the present invention, the air venting means is provided with a large number of vent holes having an opening size smaller than the particle size of the beads. It has a porous part, and it is constituted so that at least a part of the conveyance air may be discharged outside through a vent hole of the porous part.

  In the present invention, it is preferable that the cooling air supply means is connected to the air venting means, and the cooling air supplied by the cooling air supply means passes through the air venting means. It is configured to be introduced into the supply pipe, so that the cooling air can be advantageously guided into the supply pipe, so that the supply pipe can be cooled effectively.

  According to a preferred aspect of the present invention, the air vent means comprises a container-like main body surrounded by a ceiling wall, a bottom wall, and a side wall, and the supply pipe is connected to the bottom wall of the container-like main body. On the other hand, the transfer pipe is connected to the side wall of the container-shaped main body, and the side wall facing the connected side wall of the transfer pipe is allowed to collide with the beads conveyed through the transfer pipe and the transfer air. The portion is provided with a porous portion provided with a large number of vent holes having an opening size smaller than the particle size of the beads, and an air blowing tube for blowing the cooling air into the ceiling wall of the container-shaped body A configuration in which is connected is advantageously employed.

  Furthermore, in the present invention, the side wall portion provided with the porous portion of the container-like main body is removable, and the side wall portion is a porous member in which the porous portion does not exist or the size of the vent hole is adjusted. In order to prevent the leakage of the beads from the air holes in the porous portion when using beads having different particle diameters, it is preferable that the air holes are arranged to be replaced with a side wall member having a portion. Even when it is necessary to change the size, there is an advantage that it is not necessary to replace the entire air bleeding means.

  In addition, according to another preferred embodiment of the bead input device to the die casting machine according to the present invention, the supply of the cooling air by the cooling air supply means is the conveyance of the beads from the transfer pipe to the air venting means. Is controlled so as to be performed only during the stop. By doing so, the separation of the carrier air from the beads is effectively prevented from being affected by the supply of cooling air, and the beads can be introduced more advantageously.

  Furthermore, according to one of the preferred embodiments of the apparatus for introducing beads into the die casting machine according to the present invention, the air venting means and the supply pipe are respectively fixed to a stationary member of the die casting machine. Become.

  And in such a bead throwing device to the die-casting machine according to the present invention, the cooling air is connected to the air blowing pipe in the container-like main body of the air venting means, and the cooling air is supplied to the supply pipe. It is preferable that a cooling air guide tube is provided for guiding the air venting unit side opening to above.

  As described above, in the bead loading apparatus for the die casting machine according to the present invention, together with the air venting means for separating at least a part of the transporting air for transporting the solid beads from the beads, the air venting means is provided below the air venting means. Since the supply pipe for guiding the dropped beads to the pouring port of the molten metal supply sleeve of the die casting machine is provided at a fixed position, an actuator for driving those members becomes unnecessary, and thus In addition to eliminating the problems of increasing the size and cost of the bead throwing device itself due to the placement of a simple actuator and the complexity of the placement structure, programming effort and costs for consistency with the operation of the die casting machine are also included. It is possible to advantageously solve the problem of occurrence of

  Moreover, in the bead feeding device for the die casting machine according to the present invention, the beads falling downward from the air venting means are led to the pouring port of the molten metal supply sleeve of the die casting machine through a supply pipe having a relatively small occupied space. Therefore, even when such a supply pipe is provided in a fixed position, interference with a ladle that is driven to supply the molten metal is advantageous above the pouring port of the molten metal supply sleeve. It can be avoided.

  And in the bead injection device to the die-casting machine according to the present invention, the cooling air supply means is provided, and the cooling air is vented into the supply pipe so as to be led to the pouring opening side opening of the supply pipe. Therefore, cooling of the supply pipe can be effectively performed by the ventilated cooling air, and thereby melting or fusion of the beads inside the supply pipe can be advantageously prevented, and the beads It exhibits the characteristics that can be introduced smoothly and reliably.

It is a fragmentary sectional explanatory view showing an example of a bead throwing device to a die-casting machine according to the present invention together with a die-casting machine. FIG. 2 is a partial cross-sectional explanatory view taken along arrow A in FIG. It is explanatory drawing which expands and shows the C section in FIG. 2, Comprising: (a) is expanded partial sectional explanatory drawing about the said site | part, Comprising: The flow of the bead and conveyance air in an air bleeding apparatus is shown typically (B) is an EE cross-sectional explanatory drawing in (a). FIG. 2 is an enlarged explanatory view of a B part in FIG. 1, schematically showing a state in which beads are introduced into a sleeve from a distal end opening of a supply pipe. It is explanatory drawing for showing the positional relationship of a supply pipe and a ladle above a sleeve, Comprising: (a) is D section enlarged explanatory drawing in FIG. 2, (b) is F arrow in (a). FIG. FIGS. 4A and 4B are explanatory views for showing the flow mode of cooling air in the air venting device and the supply pipe, wherein FIG. 4A is a partial cross-sectional explanatory view corresponding to FIG. 3A and FIG. FIG. It is a perspective explanatory view showing typically the exchange form of the porous member in the air bleeding device. FIG. 5 is an explanatory view corresponding to FIG. 4 schematically showing a state in which the beads are energized by the carrier air and put into the sleeve, and (a) shows a case where beads having a relatively large particle diameter are used. (B) shows the case where beads having a relatively small particle diameter are used. (A), (b) is the fragmentary sectional explanatory view corresponding to (a) of Drawing 3, showing other examples of the device for throwing beads into the die-casting machine according to the present invention. It is explanatory drawing corresponding to FIG. 2 which shows another example of the bead injection | throwing-in apparatus to the die-casting machine according to this invention. It is explanatory drawing corresponding to FIG. 2 which shows the further another example of the bead injection | throwing-in apparatus to the die-casting machine according to this invention.

  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 and FIG. 2 show an example of a bead feeding device to a die casting machine according to the present invention together with a cold chamber type die casting machine. The die casting machine 10 has a basic structure similar to that of the prior art. As shown in the drawing, the fixed mold 16 and the movable mold 18 attached to the fixed platen 12 and the movable platen 14 are respectively connected to each other. By being clamped by a clamping cylinder 22 while being guided by four tie bars 20 extending in parallel, a predetermined molding cavity 24 is formed between them. Such a molding cavity 24 communicates with a molten metal supply sleeve 30 (hereinafter simply referred to as a sleeve 30) through a runner 26 and a gate 28. The sleeve 30 has a thick cylindrical shape, and a pouring port 32 having a substantially rectangular hole shape in plan view that opens to the outside through the upper side portion behind the fixed platen 12 (right side in FIG. 1). Is formed. Furthermore, a plunger 34 is disposed in the sleeve 30, and an injection cylinder 36 for reciprocating the plunger 34 is disposed behind the plunger 34.

  As shown in FIG. 2, a ladle 38 in which a molten metal to be die-cast is accommodated, and a ladle driving device 42 having a ladle 40 having a handle shape are disposed in the vicinity of the sleeve 30. A predetermined amount of molten metal is drawn from the ladle 38 by the ladle 40 and supplied into the sleeve 30 through the pouring port 32 as shown by a two-dot chain line in FIG. It has become. The ladle driving device 42 is connected to the controller 43 so that its operation is controlled. The molten metal thus injected into the sleeve 30 is injected into the forming cavity 24 at a high speed and a high pressure by the plunger 34, so that the target metal casting is formed. -ing

  By the way, in such a die-casting machine 10, beads 44 that are solid lubricants are supplied (introduced) into the sleeve 30 for each molding cycle for lubrication between the sleeve 30 and the plunger 34. It is like that. Examples of the beads 44 used here may include various types of known solid lubricants in the form of pellets obtained by granulating a mixture of wax and graphite. For example, commercially available shot beads (SHOTBEADS) (registered trademark: manufactured by J & S Chemical Co., Ltd.) can be used as appropriate, and beads 44 having a size of about 0.3 mm to 3 mm are generally used. It becomes.

  In order to put such beads 44 into the sleeve 30, a bead weighing device 46 and a bead feeding device 48 are provided. Therefore, since the bead weighing device 46 has a basic structure similar to that of the prior art, detailed description thereof will be omitted here. A predetermined amount of beads 44 required for lubrication between the sleeve 30 and the plunger 34 is weighed, and is supplied to the bead input device 48 through the transfer pipe 50 by carrier air supplied from an air source (not shown). It has become. Note that such a bead weighing device 46 is also connected to the controller 43 so that its operation is controlled.

  The bead throwing device 48 is connected to the tip of a transfer pipe 50 that guides the beads 44 conveyed by the conveying air, and the beads 44 are transferred from the air releasing device 54 to the pouring port 32 of the sleeve 30. A supply pipe 56 that guides the cooling pipe and a cooling air supply device 58 that supplies cooling air to the supply pipe 56 and vents the cooling air to the opening of the tip of the supply pipe 56 are configured. The fixed angle 60 is fixed to the fixed platen 12 that is a stationary member of the die casting machine 10.

  As shown in FIGS. 3 (a) and 3 (b), the air venting device 54 has a container-like main body 62 made of a hollow rectangular block made of aluminum, and a transfer pipe with respect to the side wall thereof. On the other hand, a porous member 68 is attached to the side wall opposite to the side wall to which the transfer pipe 50 is connected. A cooling air supply device 58 is connected to the ceiling wall of the container-like main body 62, while a supply pipe 56 is attached to the bottom wall.

  Specifically, the transfer pipe 50 is connected to the transfer pipe connection hole 64 formed in one side wall of the container-like main body 62 at the tip thereof and communicated with the inside of the container-like main body 62 so that the transfer is performed. The beads 44 conveyed in the tube 50 are introduced into the container-shaped main body 62 together with the conveying air.

  Also, a large opening 66 is formed in the side wall where the bead 44 introduced from the transfer pipe 50 and the side wall where the carrier air collides are opposed to the side wall where the transfer pipe connection hole 64 of the container-like body 62 is formed. The porous member 68 is attached so as to cover the opening 66. Here, the porous member 68 is made of a thin metal plate, and a porous portion 72 in which a large number of vent holes 70 having an opening size smaller than the particle size of the beads 44 is formed in a portion corresponding to the opening 66. Is formed. Further, as shown in FIG. 3B, such a porous member 68 is bent at two opposing sides so as to exhibit a substantially U-shaped cross section, and at the opposing side portion. Are formed with engagement bent portions 74 and 74 having a V-shaped cross section that are convex inward. And such engagement bending parts 74 and 74 are each formed in the two side walls adjacent to the side wall in which the opening part 66 of the container-shaped main body 62 is formed, and the engagement groove | channel 76 of V-shaped cross section. , 76, the porous member 68 is integrally and detachably attached to the container-like main body 62.

  Further, a cooling air blowing hole 82 is formed in the ceiling wall of the container-like main body 62, and an air blowing pipe 86 for blowing cooling air is connected via a flow rate controller 84 attached thereto. Yes. The air blowing pipe 86 is connected to a cooling air source (compressor) 88 so as to supply cooling air into the container-like main body 62 (see FIG. 2). The hole 82, the flow rate controller 84, the air blowing pipe 86, and the cooling air source 88 constitute a cooling air supply device 58. The flow rate controller 84 is connected to the controller 43 and has a known structure for controlling the circulation and flow rate of the cooling air by its operation. Under the control of the flow rate controller 84, the air blowing pipe 86. Through this, cooling air is supplied into the container-like main body 62.

  The bottom wall of the container-like main body 62 is formed with a truncated cone-shaped tapered surface 78 having a diameter expanding upward, and a supply pipe connection hole 80 is formed therein. Is connected. The supply pipe 56 is a pipe made of a metal such as copper, and the tip (lower end) extends to the pouring port 32 of the sleeve 30 (see FIGS. 1 and 2), and drops from the container-like main body 62. The brazed beads 44 can be guided to the pouring port 32 of the sleeve 30. Note that such a supply pipe 56 reduces the occupied space above the sleeve 30 (the pouring port 32) and secures ease of deformation that allows a path to be set relatively easily during actual use. For example, the outer diameter is about 10 mm and the wall thickness is about 1 mm.

  Therefore, in the bead loading device 48 having such a configuration, beads are loaded as follows. That is, first, as shown in FIG. 3A, the beads 44 sent from the bead weighing device 46 and carried by the carrier air in the transfer pipe 50 are transferred to the transfer pipe in the container-like main body 62. 50 is ejected toward the porous member 68 from the front end opening portion, and is caused to collide with the porous portion 72 of the porous member 68 together with the conveying air. Then, at least a part of the carrier air colliding with the porous portion 72 and the beads 44 passes through the vent hole 70 and is discharged to the outside of the container-like main body 62 [FIG. [See the thin arrow in the figure.] On the other hand, since the beads 44 colliding with the porous member 68 cannot pass through the vent hole 70, they fall downward due to their own weight or the flow of the carrier air remaining in the container-like body 62 after colliding with the porous member 68. The fallen bead 44 is introduced into the supply pipe 56 while being guided by the tapered surface 78 and guided further downward, and as shown in FIG. From the opening on the side of the pouring port 32, the pouring is made toward the pouring port 32 of the sleeve 30. At this time, since at least a part of the carrier air is separated from the beads 44 in the air venting device 54, the carrier beads 44 are released from the urging force by the carrier air, and are gradually close to natural fall due to their own weight. It is introduced into the sleeve 30 at a high speed. Further, when such beads 44 are introduced, the carrier air and beads 44 are not leaked from the cooling air blowing hole 82 toward the air blowing pipe 86 through the flow rate controller 84 under the control of the controller 43. .

  When the introduction of the beads 44 into the sleeve 30 is completed, the controller 43 starts the operation of the ladle driving device 42 shown in FIG. Molten metal is supplied. Here, since the occupied space above the sleeve 30 (pouring port 32) of the supply pipe 56 is reduced, the ladle 40 is connected to the sleeve 30 as shown in FIGS. 5 (a) and 5 (b). Even if the molten metal is supplied and the molten metal is supplied, the interference between the ladle 40 and the bead feeding device 48 (supply pipe 56) is advantageously avoided.

  On the other hand, while the operation of loading the beads 44 is stopped, in other words, the supply of the carrier air is stopped, and the beads 44 are fed from the bead weighing device 46 shown in FIG. While the conveyance is stopped, the cooling air supply device 58 supplies cooling air. That is, by the operation control of the flow rate controller 84 by the controller 43, as shown in FIG. 6A, a predetermined flow rate of cooling air is formed on the ceiling wall of the air vent device 54 (container body 62). That is, the air is blown into the container-like main body 62 from the cooling air blowing hole 82 [see the white arrow in FIG. 6A]. In addition, the cooling air blown in this way is introduced into the supply pipe 56 through the container-like main body 62, and thereafter, as shown in FIG. It will be discharged | emitted from the gate 32 side opening part (refer the white arrow of FIG.6 (b)). By such circulation and blowing of cooling air, the vicinity of the opening on the side of the pouring port 32 of the supply pipe 56 that is heated by the heat of the molten metal poured into the pouring port 32 of the sleeve 30, and further The portion of the supply pipe 56 where heat is transferred through, and thus the air venting device 54, is effectively cooled.

  Then, the operation of charging the beads 44 and the operation of blowing cooling air as described above are repeatedly performed in accordance with the molding cycle of the die casting machine 10, so that the sleeve 30 and the plunger 34 are changed every molding cycle of the die casting machine 10. Effective lubrication between the two is performed.

  As described above, in the bead throwing device 48, since the air venting device 54 and the supply pipe 56 are provided in a fixed position with respect to the die casting machine 10, an actuator for driving those members is completely unnecessary. Therefore, in addition to the problem of the increase in the size of the bead throwing device 48 itself and the increase in cost due to the arrangement of the actuator, the operation of the actuator and the die casting machine 10 can be solved. The problem of programming effort and cost for achieving consistency with the above operation can be advantageously solved.

  Moreover, even when the supply pipe 56 is provided in a fixed position as described above, the beads 44 are guided to the pouring port 32 of the sleeve 30 of the die casting machine 10 through the supply pipe 56 having a relatively small occupied space. Thus, the interference between the supply pipe 56 and the ladle 40 that is driven to supply the molten metal can be advantageously avoided above the pouring port 32 of the sleeve 30.

  Further, in the bead charging device 48, a cooling air supply device 58 is provided, and the cooling air is supplied to the supply pipe 56 through the air venting device 54 (container-shaped main body 62). Cooling from the place where the inside of the supply pipe 56 that is discharged from the opening of the supply pipe 56 on the side of the pouring port 32 and receives the action of the heat of the molten metal poured into the sleeve 30 is vented. Cooling of the supply pipe 56 by air can be performed effectively, whereby the melting or fusion of the beads 44 inside the supply pipe 56 can be advantageously prevented, and the introduction of the beads 44 can be performed more smoothly. And the characteristic which can be performed reliably is exhibited.

  Further, here, the cooling air supply by the cooling air supply device 58 is controlled so as to be performed only while the conveyance of the beads 44 from the transfer pipe 50 to the air bleeding device 54 is stopped. Therefore, the separation of the carrier air from the beads 44 can be effectively suppressed or prevented from being affected by the supply of the cooling air, and the beads 44 can be introduced more advantageously. ing.

  By the way, in the air venting device 54 having such a structure, since the porous member 68 attached to the container-like main body 62 is detachable, the porous member 68 is made to be a vent according to the size of the bead 44. By replacing the porous member 70 with a different size, the size of the vent hole in the air venting device 54 can be adjusted. For example, when introducing beads (44) having a smaller particle diameter, the porous member 68 has a diameter smaller than that of the air hole 70 formed in the porous member 68, as shown in FIG. A porous member 94 having a porous portion 92 provided with a large number of vent holes 90 having an opening size smaller than the particle size of the beads (44) can be replaced, and thereby beads having a smaller particle size are introduced. At this time, there is an advantage that even when it is necessary to reduce the diameter of the vent hole in order to prevent leakage of beads from the vent hole in the porous portion, it is not necessary to replace the entire air venting device.

  Further, as another embodiment of the replacement of the porous member 68, by using a porous member in which no air holes are formed, the air venting device 54 is configured such that the porous portion does not exist on the side wall portion thereof. It can also be configured. Accordingly, it is possible to cope with beads that can be introduced into the pouring port 32 of the sleeve 30 without separating the carrier air, and when introducing beads having a very small particle diameter, the air holes in the porous portion Even when it is necessary to use an air venting device having a side wall portion where no porous portion exists, there is an advantage that it is not necessary to replace the entire air venting device. However, if such a configuration is adopted, the bead 44 that is allowed to fall downward in the supply pipe 56 is biased by the carrier air since the carrier air cannot be separated in the air venting device 54. become. For this reason, when the particle size of the beads 44 is relatively large (generally larger than about 0.3 mm), the kinetic energy of each bead 44 increases as shown in FIG. There is a risk that the beads 44 will jump off the bottom surface of the sleeve 30 and jump out of the sleeve 30. On the other hand, when the particle size of the beads 44 is relatively small (generally about 0.3 mm or less), the kinetic energy of each bead 44 is small as shown in FIG. The beads 44 that have come into contact with the inner circumferential surface of the 30 are welded to the inner circumferential surface of the sleeve 30 without rebounding. Therefore, it is effective to use the side wall member having no porous portion when using beads having a relatively small particle diameter.

  Further, in order to more advantageously supply the cooling air to the supply pipe 56, a cooling air guide pipe 95 may be provided as shown in FIG. Here, the cooling air guide pipe 95 has a straight pipe shape, and the upper end portion thereof communicates with the air blowing pipe 86 of the cooling air supply device 58 via the cooling air blowing hole 82 and the flow rate controller 84. At the same time, the lower end portion opens toward the opening portion of the supply pipe 56 on the air bleeding device 54 side. Then, as indicated by the white arrow in FIG. 9A, the cooling air to be supplied to the supply pipe 56 is obtained by allowing the cooling air to flow inside the cooling air guide pipe 95. The cooling air can be advantageously supplied into the supply pipe 56 by preventing or suppressing leakage from the air venting device 54 (ventilation hole 70) to the outside, so that the supply pipe 56 is more effective. Can be cooled. In order to further advantageously prevent or suppress the leakage of the cooling air from the vent hole 70, the end (lower end) of the cooling air guide pipe 95 on the supply pipe 56 side is connected to the air venting device 54 (container In the main body 62), it is desirable to be located horizontally below the vent hole 70 located at the bottom [see FIG. 9 (a)]. Further, the cooling air guide tube 95 is not provided with a lower end portion of the cooling air guide tube 95 and an opening of the supply tube 56 on the air venting device 54 side so that the introduction of the beads 44 into the supply tube 56 is not hindered. It is desirable to leave a certain interval between them. As another embodiment of such a cooling air guide pipe 95, as shown in FIG. 9B, at least one hole 95a having a predetermined diameter can be provided in the pipe wall. By supplying a predetermined amount of cooling air into the air venting device 54 (container-shaped main body 62) through the hole 95a, the air venting device 54 (container-shaped main body 62) is also cooled more effectively. It will be possible.

  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 above-described embodiment, the cooling air is supplied only while the conveyance of the beads 44 from the transfer pipe 50 to the air venting device 54 is stopped. It is possible to supply cooling air even while the conveyance is performed. In this case, due to the influence of the supply of cooling air, the carrier air is not sufficiently separated from the beads 44, or the beads 44 are energized by the cooling air and jump on the inner peripheral surface of the sleeve 30. It is desirable to adjust the flow rate of the cooling air so that it does not jump out. In order to avoid such a problem, it is also effective to change the flow rate of the cooling air between when the beads 44 are being transported and when the beads 44 are stopped.

  In addition, as illustrated, the cooling air not only uses room temperature compressed air supplied from a cooling air source 88 such as a compressor, but also prepares a refrigerator and uses air cooled to room temperature or lower. You can also As a result, the supply pipe 56 can be cooled more advantageously. The supplied cooling air is dry and clean air so as to prevent the inside of the flow controller 84 and the supply pipe 56 from being contaminated by impurities such as oil contained therein as much as possible. Therefore, it is desirable to use a purification device such as an air filter between the cooling air source 88 and the flow rate controller 84.

  Further, as the porous member 68, a so-called punching metal obtained by punching a metal plate can be used, or a mesh member such as a wire mesh, a porous plate formed by photoetching, or the like can be used. . In short, it has a porous portion 72 composed of a large number of vent holes 70 having an opening size smaller than the particle size of the beads 44 used, and is deformed by the conveying air ejected from the tip opening portion of the transfer pipe 50 and the pressure of the beads 44 Any member can be used as long as the member has such rigidity. The shape of the vent hole 70 may be any shape other than a circular hole, for example, a slit, and the number of vent holes 70 is not limited to the number of the present embodiment.

  In addition, you may make it form the porous part 72 in the several side wall of the air venting apparatus 54 (container-shaped main body 62). As a result, the carrier air can be more advantageously separated and discharged to the outside. A plurality of vent holes 70 may be directly formed in the side wall of the container-like main body 62 to form the porous portion 72.

  Moreover, the attachment method of the porous members 68 and 94 to the container-shaped main body 62 is not limited to the form by the illustrated fitting, for example, welding, fixing with a band, fixing with a screw, a bolt, or the like. Although any attachment method can be used, it is desirable to adopt a known attachment structure that can be easily removed so that the plurality of porous members (68, 94) can be replaced with each other.

  In addition, the container-like main body 62 in the air venting device 54 is not limited to a hollow rectangular block body shape formed by cutting out a metal block, and may be formed by joining a plurality of metal plates, It can also be formed using a so-called T-shaped piping member, and even if it is made of a material, not only a metal but also a resin, a ceramic or a composite material can be used.

  Further, in the present embodiment, the cooling air supply device 58 is fixed to the fixed platen 12 by the fixed angle 60 so that the air bleeding means 54 and the supply pipe 56 are fixed to the position. The fixing position of the air supply device 58 is not limited to this. For example, the cooling air supply device 58 is attached to a stationary member other than the stationary platen 12, or is attached to a separately provided stand 96 as shown in FIG. 56 may be provided to be fixed in position.

  Further, as shown in FIG. 11, the timing of the conveyance of the beads 44 and the supply of the cooling air may be controlled by the sequencer 98 built in the bead weighing device 46 without providing the controller 43. Here, the air source 100 is connected to an electromagnetic valve 102 disposed in the bead weighing device 46, and the air source 100 is connected to the air blowing pipe 86 and the transfer pipe 50 through the electromagnetic valve 102. . Then, by controlling the opening / closing operation of the electromagnetic valve 102 by the sequencer 98, the flow and flow path of the air (compressed air) supplied from the air source 100 can be switched, thereby conveying the beads 44. (Supply of the supply air into the transfer pipe 50 through the bead measuring device 46) and the supply timing of the cooling air are controlled. In this case, the flow controller 84 is also operated by the sequencer 98 incorporated in the bead weighing device 46, while the operation control of the die casting machine 10 including the ladle driving device 42 is performed by such a sequencer. This is performed separately by a controller, sequencer, etc. provided separately from 98.

  In addition, although not listed one by one, the present invention can be carried out in an embodiment to which various changes, modifications, improvements and the like are added based on the knowledge of those skilled in the art. It goes without saying that any one of them falls within the scope of the present invention without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Die-casting machine 12 Fixed platen 30 Sleeve 32 Pouring port 34 Plunger 40 Laddle 44 Bead 46 Bead measuring device 48 Bead feeding device 50 Transfer pipe 54 Air venting device 56 Supply pipe 58 Cooling air supply device 60 Fixed angle 62 Container-shaped main body 68, 94 Porous members 70, 90 Vent holes 72, 92 Porous part 82 Cooling air blowing hole 84 Flow rate controller 86 Air blowing pipe 88 Cooling air source 95 Cooling air induction pipe

Claims (8)

The solid beads transported in the transfer pipe by the transport air are guided to the air venting means, and at least a part of the transport air is separated from the beads, while the beads are allowed to drop downward, so that the metal of the die casting machine In the bead charging device that is to be inserted into the pouring port that opens to the outside provided in the molten metal supply sleeve,
The air venting means is provided at a fixed position, and a supply pipe for guiding the falling beads from the air venting means to the pouring port of the molten metal supply sleeve is provided at a fixed position, and cooling air is supplied to the supply pipe. Then, the apparatus for supplying beads to the die casting machine is provided with a cooling air supply means for ventilating the cooling air into the supply pipe so as to be discharged from the opening on the pouring port side of the supply pipe.   The air venting means has a porous part provided with a large number of vent holes having an opening size smaller than the particle size of the beads, and at least a part of the conveying air is discharged to the outside through the vent holes of the porous part. The apparatus for charging beads into a die-casting machine according to claim 1, wherein the apparatus is configured to be configured as described above.   The cooling air supply means is connected to the air venting means so that the cooling air supplied by the cooling air supply means is introduced into the supply pipe through the air venting means. The bead injection apparatus to the die-casting machine of Claim 1 or Claim 2.   The air venting means includes a container-shaped main body surrounded by a ceiling wall, a bottom wall, and a side wall, and the supply pipe is connected to the bottom wall of the container-shaped main body, while the side wall of the container-shaped main body is On the other hand, the particle size of the beads is smaller than the bead particle size at the side wall portion where the transfer pipe is connected and facing the side wall to which the transfer pipe is connected, where the beads conveyed through the transfer pipe collide with the transfer air. A porous portion provided with a large number of vent holes having an opening size is provided, and an air blowing pipe for blowing the cooling air is connected to a ceiling wall of the container-shaped main body. The bead injection apparatus to the die-casting machine according to any one of claims 1 to 3.   The side wall part provided with the porous part of the container-like main body is removable, and the side wall part is a side wall member having a porous part in which the porous part does not exist or the size of the vent hole is adjusted. The apparatus for charging beads into a die-casting machine according to claim 4, wherein the apparatus can be replaced.   6. The cooling air supply by the cooling air supply means is controlled so as to be performed only while the conveyance of beads from the transfer pipe to the air bleeding means is stopped. The bead injection apparatus to the die-casting machine of any one of Claims 1.   The bead injection device for a die casting machine according to any one of claims 1 to 6, wherein the air venting means and the supply pipe are fixed to a stationary member of the die casting machine, respectively. A cooling air guide pipe is provided in the container-like main body of the air venting means and communicates with the air blowing pipe to guide the cooling air to above the air vent means side opening of the supply pipe. The apparatus for charging beads into a die-casting machine according to any one of claims 4 to 7, characterized in that

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