JP6255943B2 - Hot water supply ladle and hot water supply method - Google Patents

Description

  The present invention relates to a hot water supply ladle and a hot water supply method.

  For example, Patent Literature 1 discloses a hot water supply ladle provided with a molten metal scattering prevention unit that prevents molten metal from scattering during hot water supply by covering the hot water supply unit during hot water supply. Since the molten metal can be prevented from scattering, the speed at which the hot water supply ladle is rotated during hot water supply can be increased. Thereby, since a molten metal can be supplied in a comparatively short time, the cycle time at the time of hot water supply can be shortened.

  Patent Document 2 discloses a hot water supply ladle provided with a protrusion that rotates in the circumferential direction when molten metal flows in a hot water supply section formed in a cylindrical shape. By rotating the molten metal by the protrusions, the replacement of the air and the molten metal in the hot water supply unit is performed efficiently, so that the molten metal can be supplied in a relatively short time.

JP2012-35301A JP 2011-125920 A

However, in the hot water supply ladle disclosed in Patent Document 1, since the movable portion for rotating the hot water supply portion and the hot water splash prevention portion relatively, when the movable portion is burned by the heat of the molten metal, There is concern about malfunction.
Further, in the hot water supply ladle disclosed in Patent Document 2, when the molten metal is deposited on the protrusion or when the protrusion is worn by the molten metal, the flowing direction of the molten metal cannot be sufficiently controlled. When the flow of the molten metal cannot be controlled, the molten metal cannot be rotated in the hot water supply section, and the hot water cannot be supplied in a short time.

  The present invention has been made in order to solve the above-described problems. With a simple configuration, the molten metal can be supplied in a relatively short time compared to the conventional configuration, and the cycle time during hot water supply is shortened. It is an object to provide a hot water supply ladle that can be used and a hot water supply method using the hot water supply ladle.

In order to solve the above-mentioned problem, a hot water supply ladle according to claim 1 includes a storage part for storing molten metal, a hot water supply part formed to protrude outward above the storage part, and a protruding direction of the hot water supply part. A hot water supply ladle that is disposed so as to intersect and has a rotating shaft that rotates the storage part and the hot water supply part in order to supply hot water to the hot water supply part, and the hot water supply part is a tip that discharges the molten metal A first curved surface formed so as to be convex inward on one inner side in the rotation axis direction, and an introduction portion formed between the storage portion and the tip portion. The second curved surface formed so as to be convex inward on the other inner side in the rotation axis direction and the first curved surface connected to the first curved surface on the upstream side in the flow direction of the first molten metal flow flowing along the first curved surface includes a third curved surface, the curvature of the first curved surface is formed larger than the curvature of the second curved surface And by Rukoto curvature of the third curved surface is formed by the second curved surface of curvature less than the curvature of the angle between the flow direction and the protruding direction of the first molten metal stream, the second molten metal stream flowing along the second curved surface When the first molten metal flow and the second molten metal flow join each other, the molten metal flowing through the tip turns with respect to the protruding direction.

  According to this, since the curvature of the first curved surface is formed larger than the curvature of the second curved surface in the first curved surface and the second curved surface formed in the introduction portion of the hot water supply portion, the molten metal that turns the molten metal during hot water supply Can be made. That is, with a simple configuration, the molten metal can be swung at the tip, and the molten metal can be supplied in a short time.

Moreover , since the curvature of a 3rd curved surface is formed with a curvature smaller than the curvature of a 2nd curved surface, the distribution direction of a 2nd molten metal flow and a 1st molten metal flow can be directed more reliably. Therefore, the molten metal can be turned more reliably at the tip portion.

Further, the invention according to claim 2 is the hot water supply ladle according to claim 1, wherein the tip portion is formed in a square shape on the inner bottom surface, and the discharge direction of the molten metal is predetermined when the discharge amount of the molten metal is a predetermined value or less. It has a rectifier that rectifies in the direction.

  According to this, since the tip has a rectifying unit that rectifies the discharge direction of the molten metal in a predetermined direction when the discharge amount of the molten metal is equal to or less than a predetermined value, The discharge direction can be reliably directed.

The invention according to claim 3 is the hot water supply ladle according to claim 1 or claim 2 , wherein the hot water supply portion is a sleeve in a die casting machine, and in the top view of the die casting machine, the protruding direction and the axial direction of the sleeve Are different from each other, the tip portion is formed to bend in the axial direction of the sleeve.

  According to this, since the distal end portion is formed to bend in the axial direction of the sleeve, the discharge direction of the molten metal can be made to be along the axial direction of the sleeve as compared with the case where the distal end portion is not curved. it can. Therefore, it is possible to suppress the splash of the molten metal that is generated when the molten metal rebounds in the sleeve during hot water supply.

Further, a hot water supply method according to claim 4 is a hot water supply method for supplying molten metal to a hot water supply portion using the hot water supply ladle according to any one of claims 1 to 3 , and pumping up the molten metal with the hot water supply ladle. A hot water step, a moving step of moving the hot water supply ladle from a hot water supply position for pumping the molten metal to a hot water supply location for supplying hot water to the hot water supply portion, a standby step for waiting for the hot water supply ladle until the hot water supply of the molten metal is started at the hot water supply location, A hot water supply step of hot water supply to the hot water supply portion by rotating the hot water supply ladle, and the standby step has one end of the upper surface of the molten metal stored in the hot water ladle storage portion near the lower portion of the hot water supply portion. A fine rotation step of rotating the hot water supply ladle until it is positioned, and a fine rotation maintaining step of maintaining the state where the hot water supply ladle is rotated in the fine rotation step.

According to this, since the hot water supply ladle that supplies the molten metal in a short time is used by turning the molten metal during hot water supply by the curved surface formed in the hot water supply section, the angular velocity for rotating the hot water supply ladle during hot water supply can be increased. . Therefore, the cycle time during hot water supply can be shortened.
In addition, the fine rotation process starts the hot water supply process in order to rotate the hot water supply ladle until one end of the upper surface of the molten metal stored in the storage part is positioned near the lower part of the hot water supply part before starting the hot water supply. Thereafter, the molten metal can be discharged immediately. Therefore, the cycle time during hot water supply can be further shortened.

It is a schematic diagram which shows the hot water supply ladle which concerns on embodiment of this invention. It is side surface sectional drawing of the hot water supply ladle shown in FIG. FIG. 3 is a top cross-sectional view along the line III-III of the hot water supply ladle shown in FIG. 2. It is IV arrow line view of the hot-water supply ladle shown in FIG. It is a partially expanded sectional view of the hot water supply ladle shown in FIG. It is the front one part enlarged view of the hot-water supply ladle shown in FIG. It is a figure which shows the sleeve in the top view of a die-casting machine, and the hot water supply ladle at the time of hot water supply. It is a figure which shows the cross section of the sleeve along the VIII-VIII line shown in FIG. 7, and the hot water supply ladle at the time of hot water supply. It is a figure which shows the axial direction cross section of the sleeve in the side view of a die-casting machine, and the hot water supply ladle at the time of hot water supply. It is a figure which shows the hot water supply process of the hot water supply method which concerns on embodiment of this invention. It is side surface sectional drawing of the hot water supply ladle shown in FIG. 1 in the fine rotation maintenance process of the hot water supply method which concerns on embodiment of this invention. It is a time chart which shows the operation | movement by the hot water supply method which concerns on embodiment of this invention. It is a figure which shows the hot water supply ladle which concerns on a prior art.

(Hot water ladle)
An embodiment of a hot water supply ladle 100 according to the present invention will be described with reference to the drawings. In this specification, for convenience of explanation, the upper side and the lower side in FIG. 1 are the upper side and the lower side of the ladle 100, the left side and the right side are the front and the rear of the ladle 100, respectively, and The upper left side will be described as the left side and the right side of the ladle 100, respectively. 1 to 3 show arrows indicating the respective directions.

  A hot water supply ladle 100 according to the present embodiment is a sleeve 20 (a hot water supply portion of the claims) in the cold chamber die casting machine shown in FIG. 7 (corresponding to the die casting machine of the claims, hereinafter referred to as the die casting machine). Is used to supply molten metal M such as aluminum stored in the molten metal holding furnace 30 shown in FIG. That is, the ladle 100 is a container having an opening 100a on the upper side, and temporarily stores the molten metal M. Further, in the present embodiment, as shown in FIG. 7, the ladle 100 supplies the molten metal M from the side of the sleeve 20 in a top view of the die casting machine.

  And the support part 101 with which the ladle 100 is provided is being fixed to the rotation mechanism (not shown) arrange | positioned at the front-end | tip part of the arm 10 in a water heater (not shown), as shown in FIG. As will be described later, the water heater pumps up the molten metal M by driving the arm 10 and rotating the ladle 100 around the rotation shaft 101a in the support portion 101 to supply hot water to the sleeve 20. The ladle 100 is made of a material having excellent heat resistance such as cast iron and ceramics, but the type is not limited.

  As shown in FIGS. 2 and 3, the ladle 100 includes a storage part 110, a hot water supply part 120, and a scooping hot water part 130. Further, the posture A of the ladle 100 shown in FIG. 2 represents the posture A1 in which the molten metal M is stored.

The storage unit 110 stores the molten metal M. The reservoir 110 is formed in a bowl shape.
The hot water supply unit 120 is formed so as to protrude outward above the storage unit 110. In the present embodiment, the hot water supply unit 120 is formed in a cylindrical shape that intersects the direction of the rotation shaft 101 a and protrudes forward so as to be continuous with the storage unit 110. Here, as shown in FIG. 3, the rotating shaft 101 a is disposed so as to intersect the protruding direction D <b> 1 of the hot water supply unit 120, and in order to supply the molten metal M to the sleeve 20, the storage unit 110 and the hot water supply unit 120 are provided. It is intended to rotate. In the present embodiment, the direction of the rotating shaft 101a and the protruding direction D1 are orthogonal to each other. In FIG. 3, the rotation axis 101 a is shown in the left-right direction of the ladle 100, and the protruding direction D 1 is shown in the front-rear direction of the ladle 100. 3 to 6, the boundary of each curved surface described later on the inner surface of the ladle 100 is indicated by a thin line.

  Further, the inside of the hot water supply unit 120 is a flow path for discharging the molten metal M stored in the storage unit 110, and is formed so as to reduce the flow path area ahead of the rear. The hot water supply unit 120 includes a distal end portion 121 and an introduction portion 122.

  The front end portion 121 discharges the molten metal M and is formed in a substantially cylindrical shape. Moreover, the front-end | tip part 121 is formed so that it may curve to the left side with respect to the protrusion direction D1 along the axis line 121a of the front-end | tip part 121 shown in FIG. That is, as in this embodiment shown in FIG. 7, when the protruding direction D <b> 1 of the hot water supply unit 120 and the direction of the axis 22 of the sleeve 20 are different from each other in the top view of the die casting machine, the tip 121 is the axis 22 of the sleeve 20. It is formed to curve in the direction.

  Furthermore, the front-end | tip part 121 has the rectification | straightening part 121b in the front edge part. As shown in FIG. 6, the rectifying unit 121 b is formed in a square shape on the inner bottom surface of the tip 121, and, as will be described later, when the discharge amount Q of the molten metal M is equal to or less than a predetermined value, Is rectified in a predetermined direction. And the rectification | straightening part 121b has the rectification | straightening surface 121ba and the rectification | straightening surface 121bb which were formed with the curvature smaller than the curvature of the internal peripheral surface of the front-end | tip part 121. FIG. In the present embodiment, the predetermined direction is the direction of the axis 121a of the tip 121. That is, the rectification unit 121b rectifies the discharge direction D2 of the molten metal M in the direction of the axis 121a.

  The introduction part 122 is formed between the storage part 110 and the tip part 121. The introduction part 122 has a first curved surface 122a, a second curved surface 122b, and a third curved surface 122c.

As shown in FIGS. 3 and 4, the first curved surface 122 a is formed on one inner side in the direction of the rotation shaft 101 a so as to be convex inward. In the present embodiment, the first curved surface 122 a is formed on the left side of the introduction portion 122.
The second curved surface 122b is formed on the other inner side in the direction of the rotation shaft 101a so as to be convex inward. In the present embodiment, the second curved surface 122 b is formed on the right side of the introduction portion 122.
The third curved surface 122c is disposed upstream of the first curved surface 122a in the flowing direction of the molten metal M (on the storage unit 110 side) so as to be continuously connected to the first curved surface 122a.

  In the present embodiment, the front end of the first curved surface 122a and the front end of the second curved surface 122b are disposed at substantially the same position in the front-rear direction. Furthermore, the connection part of the 1st curved surface 122a and the 3rd curved surface 122c is arrange | positioned in the center vicinity in the front-back direction of the 2nd curved surface 122b. The rear end portion of the second curved surface 122b and the rear end portion of the third curved surface 122c are disposed at substantially the same position in the front-rear direction.

  And the curvature of the 1st curved surface 122a is formed larger than the curvature of the 2nd curved surface 122b. In the present embodiment, the curvature of the first curved surface 122a is formed approximately twice that of the second curved surface 122b. In addition, the curvature of the third curved surface 122c is smaller than the curvature of the second curved surface 122b. In the present embodiment, the third curved surface 122c is formed in a substantially planar shape or a substantially planar shape. Further, the third curved surface 122c is disposed so as to be inclined with respect to the surface perpendicular to the direction of the rotation shaft 101a from the second curved surface 122b.

  As shown in FIG. 2, the scooping hot water section 130 is disposed on the rear side of the ladle 100 and above the storage section 110, opens outwardly downward, and has an opening 131 that communicates the storage section 110 with the outside. Have. As will be described later, the ladle 100 is inserted into the molten metal holding furnace 30, whereby the molten metal M flows into the storage unit 110 through the opening 131.

  Next, the flow of the molten metal M until the molten metal M stored in the storage unit 110 is discharged from the tip portion 121 will be described. 4 to 6, the flow of the molten metal M is indicated by a thick arrow. In order to discharge the molten metal M stored in the storage unit 110, the water heater rotates the ladle 100 about the rotation shaft 101a in a direction tilted forward from the posture A1.

  By rotating the ladle 100, the molten metal M flows toward the hot water supply unit 120 along the inner surface 110 a on the front side of the storage unit 110. Furthermore, when the ladle 100 rotates, the molten metal M flows into the introduction part 122 and flows toward the tip part 121 along the inner surface of the introduction part 122. At this time, the first molten metal flow F1 and the second molten metal flow F2 are generated on the inner surface of the introduction part 122.

  As shown in FIGS. 4 and 5, the first molten metal flow F <b> 1 is a flow of the molten metal M that flows along the first curved surface 122 a and the third curved surface 122 c when the molten metal M flows through the introduction portion 122. The second molten metal flow F2 is a flow of the molten metal M that flows along the second curved surface 122b when the molten metal M flows through the introduction portion 122. Here, as shown in FIG. 5, in the top view of the ladle 100, the angle AF1 between the flow direction of the first molten metal flow F1 and the protruding direction D1 is the angle between the flow direction of the second molten metal flow F2 and the protruding direction D1. Greater than AF2. In other words, the curved surfaces 122a, 122b, 122c are formed as described above so that the angle AF1 is larger than the angle AF2.

  That is, the first molten metal flow F1 is directed from the left side to the right side in the introduction part 122 by the third curved surface 122c. And since the 1st curved surface 122a is formed so that a curvature may be larger than the 3rd curved surface 122c, the 1st molten metal flow F1 is not influenced by the curvature of the 1st curved surface 122a, but is directed to the 3rd curved surface 122c. Circulate with the direction attached. In other words, the curvatures of the first curved surface 122a and the third curved surface 122c are determined so that the first molten metal flow F1 flows while maintaining the direction directed to the third curved surface 122c. On the other hand, the second curved surface 122b has a smaller curvature than the third curved surface 122c and a small inclination with respect to a surface perpendicular to the direction of the rotation axis 101a. Therefore, the flow direction of the second molten metal flow F2 is a direction along the protruding direction D1 with respect to the flow direction of the first molten metal flow F1. Therefore, the angle AF1 is larger than the angle AF2.

  And the 1st molten metal flow F1 and the 2nd molten metal flow F2 merge, and the 3rd molten metal flow F3 is produced | generated. At this time, since the angle AF1 is larger than the angle AF2, the first molten metal flow F1 merges so as to abut against the second molten metal flow F2 from the left side, and therefore the third molten metal flow F3 flows through the second molten metal flow F2. It distribute | circulates in the direction bent from the direction to the distribution direction of the 1st molten metal flow F1. Thereby, as shown in FIG. 4, the 3rd molten metal flow F3 flows in into the front-end | tip part 121, turning in the circumferential direction along an internal peripheral surface. That is, the angle AF1 between the flow direction of the first molten metal flow F1 flowing along the first curved surface 122a and the protruding direction D1 is the difference between the flow direction of the second molten metal flow F2 flowing along the second curved surface 122b and the protruding direction D1. As the angle AF2 becomes greater and the first molten metal flow F1 and the second molten metal flow F2 merge, the molten metal M flowing through the tip 121 turns in the protruding direction D1.

  Further, the third molten metal flow F3 circulates through the tip 121 while being swung with respect to the protruding direction D1 along the inner peripheral surface of the tip 121, and is discharged to the outside. Here, in the third molten metal flow F3, since the molten metal M is circulating while turning along the inner peripheral surface of the tip portion 121, the molten metal M flows along the inner peripheral surface of the tip portion 121 as shown in FIG. Layer MF. As a result, an air passage AW is formed along the direction of the axis 121 a on the radial center side of the tip 121. Then, the ladle 100 is further rotated, the flow rate of the third molten metal flow F3 is increased, and the layer MF of the molten metal M is gradually thickened, so that the air in the distal end portion 121 is gradually increased from both ends of the passage AW to the outside. Therefore, the air passage AW is gradually narrowed. When the flow rate of the third molten metal flow F3 is further increased and the tip 121 is filled with the third molten metal flow F3, all the air in the tip 121 is released and the air passage AW is eliminated. That is, in the tip portion 121, the molten metal M is filled in the radial direction of the tip portion 121 from the inner peripheral surface toward the axis 121a, so that the molten metal M is replaced with air.

  Here, a case where the molten metal M is discharged to the outside without turning at the tip 121 will be described. When the molten metal M does not swivel along the inner peripheral surface and flows into the distal end portion 121 in a state where the flow path is filled, the air in the distal end portion 121 is discharged by the molten metal M from the distal end side. However, since air is discharged from one side, the pressure inside the tip 121 is likely to increase. When the pressure inside the tip 121 increases, the flow rate of the molten metal M is suppressed. In addition, when the ladle 100 is rotated with the angular velocity increased, the pressure inside the tip 121 is further increased, so that the flow rate of the molten metal M is further suppressed. Further, in this case, the air in the distal end portion 121 tends to escape from the introduction portion 122 side, so that the flow of the molten metal M is greatly disturbed. Therefore, the flow rate of the molten metal M is further suppressed, and the air in the tip 121 is difficult to escape. Therefore, when the molten metal M is swung along the inner peripheral surface at the front end portion 121, the replacement of the molten metal M with the air at the front end portion 121 is performed more efficiently than when the swirl is not swung, and the flow rate of the molten metal M is increased. Is not suppressed.

  Further, when the discharge amount Q of the molten metal M is equal to or less than a predetermined value, the third molten metal flow F3 is directed in the direction of the axis 121a at the rectifying surface 121ba and discharged to the outside. The predetermined value is the value of the discharge amount Q immediately before the tip 121 is filled with the third molten metal flow F3. Here, as shown in FIG. 6, since the flow straightening surface 121ba is formed larger than the curvature of the inner peripheral surface of the tip 121, the circumferential flow of the third molten metal flow F3 is blocked. The flow direction of the molten metal flow F3 is rectified in the direction of the axis 121a. In addition, the shape of the inner peripheral surface of the tip 121 and the length in the protruding direction D1 are set so that the third molten metal flow F3 passes through the rectifying unit 121b and is discharged to the outside. In addition, when the front-end | tip part 121 does not have the rectification | straightening part 121b, since the flow of the circumferential direction of the 3rd molten metal flow F3 cannot be stopped, the molten metal M discharges in the direction shown by the dotted-line arrow in FIG. And when the discharge amount Q becomes larger than a predetermined value, the front-end | tip part 121 is satisfy | filled with the 3rd molten metal flow F3. Thereby, the third molten metal flow F3 is not affected by the rectifying surface 121ba, and is rectified in the direction of the axis 121a on the entire inner peripheral surface of the tip 121. Therefore, the discharge direction D2 of the molten metal M is oriented in the direction of the axis 121a.

  Further, when the ladle 100 is further rotated, the molten metal M stored in the storage unit 110 flows into the hot water supply unit 120 so as to be pulled by the third molten metal flow F3, and is discharged from the distal end portion 121 to the outside. Furthermore, when the ladle 100 is rotated to the posture A4, all the molten metal M stored in the storage unit 110 is discharged. That is, the posture A4 is the posture A of the ladle 100 that discharges all of the molten metal M stored in the storage unit 110. In the present embodiment, the angle at which the ladle 100 is rotated to achieve the posture A4 is determined by the inclination angle of the inner surface 110a. That is, when the ladle 100 is rotated until the angle of the inner surface 110a becomes equal to or higher than the horizontal angle, all of the molten metal M stored in the storage unit 110 is discharged to the outside.

  Next, the flow of the molten metal M when the molten metal M is discharged from the ladle 100 and supplied to the sleeve 20 will be described. 7 to 9, the arm 10 is not shown, and only the ladle 100 is shown. Here, as shown in FIGS. 8 and 9, the sleeve 20 is formed in a hollow cylindrical shape. The sleeve 20 has a hot water supply port 21 that opens so as to communicate with the outside and the inside of the sleeve 20 and to which the molten metal M is supplied. Further, a mold (not shown) is disposed on the left side in FIG. 7, and the molten metal M supplied into the sleeve 20 is sleeved by a plunger (not illustrated) disposed on the right side in FIG. 7. Extruded from inside 20 and supplied to the mold. In the present embodiment, as shown in FIG. 7, the ladle 100 is arranged such that the axis 22 direction of the sleeve 20 and the protruding direction D1 of the ladle 100 are, for example, 45 degrees during hot water supply. Yes.

  Here, since the distal end portion 121 is curved in the direction of the axis 22 of the sleeve 20, the molten metal M has an inner circumference of the sleeve 20 as shown by a solid arrow in the radial sectional view of the sleeve 20 in FIG. 8. Hot water is supplied toward the bottom of the surface. Here, when the tip 121 is not curved in the direction of the axis 20 of the sleeve 20, the molten metal M is discharged in the protruding direction D1 indicated by the dotted line in FIG. 7, and as shown by the dotted arrow in FIG. The hot water is supplied toward the side of the inner peripheral surface of the sleeve 20. When the molten metal M is supplied to the side, the molten metal M revolves along the inner peripheral surface of the sleeve 20 as indicated by the one-dot broken arrow, so that the molten metal M rebounds from the hot water supply port 21, It may be scattered. On the other hand, when the molten metal M is supplied toward the vicinity of the bottom surface as in this embodiment, since the rotation of the molten metal M in the sleeve 20 is suppressed, the molten metal M is scattered from the hot water supply port 21. It is suppressed.

  Furthermore, in the present embodiment, as shown by the solid line arrow in FIG. 9, the discharge angle D2 of the molten metal M at the time of hot water supply is such that the included angle between the sleeve 20 and the axis 22 direction is smaller than 90 degrees. An inner surface 110a and a hot water supply unit 120 are formed. Here, as shown by the dotted arrow in FIG. 9, when the molten metal M is heated in the vertical direction, as shown by the dotted line, the molten metal M is supplied near the hot water inlet 21 in the sleeve 20. Easy to deposit. When the molten metal M is further supplied to the accumulated portion, the molten metal M is likely to rebound, and the molten metal M scatters from the hot water supply port 21. On the other hand, when the molten metal M is supplied into the sleeve 20 in a state inclined from the vertical direction as in the present embodiment, the molten metal M flows in the mold direction K in the sleeve 20, so that it is indicated by a solid line. Moreover, the accumulation of the molten metal M in the vicinity of the hot water supply port 21 is suppressed. Therefore, scattering of the molten metal M from the hot water supply port 21 is suppressed.

  According to the present embodiment, in the first curved surface 122a and the second curved surface 122b formed in the introduction portion 122 of the hot water supply unit 120, the curvature of the first curved surface 122a is formed larger than the curvature of the second curved surface 122b. The flow of the molten metal M that turns the molten metal M at the time of hot water supply can be created. Thereby, at the time of hot water supply, the replacement of the molten metal M and air at the tip 121 is efficiently performed. Therefore, the angular velocity for rotating the ladle 100 can be further increased. That is, with a simple configuration, the molten metal M can be swung at the tip 121, and the molten metal M can be supplied in a short time.

  Moreover, since the curvature of the 3rd curved surface 122c is formed with a curvature smaller than the curvature of the 2nd curved surface 122b, the distribution direction of the 2nd molten metal flow F2 and the 1st molten metal flow F1 can be directed more reliably. . Therefore, the molten metal M can be turned more reliably at the tip 121.

  Moreover, since the front-end | tip part 121 has the rectification | straightening part 121b which rectifies | straightens the discharge direction D2 of the molten metal M to the axis line 121a when the discharge amount Q of the molten metal M is below a predetermined value, the discharge amount Q of the molten metal M is below a predetermined value. In this case, the discharge direction D2 of the molten metal M can be reliably directed.

  Further, since the tip 121 is formed to bend in the direction of the axis 22 of the sleeve 20, the discharge direction D <b> 2 of the molten metal M is along the direction of the axis 22 of the sleeve 20 as compared with the case where the tip 121 is not bent. Can be. Accordingly, it is possible to prevent the molten metal M from being scattered due to the molten metal M bouncing back in the sleeve 20 during hot water supply.

  Further, when the ladle applied to the die casting machine is changed from the ladle according to the prior art to the ladle 100 of the present embodiment, the leading end 121 is formed so as to bend in the direction of the axis 22 of the sleeve 20. It is not necessary to change the mounting shape to the arm 10 and the projecting direction D1 from the conventional ladle. Therefore, the existing equipment can be used as it is without changing the water heater, the arm 10, the sleeve 20, and the like.

  In the present embodiment, in the introduction part 122, the first curved surface 122a and the third curved surface 122c are disposed on the left side, and the second curved surface 122b is disposed on the right side. 122c may be arranged on the right side and the second curved surface 122b may be arranged on the left side.

  Further, the inner surface 110a may be formed so that the discharge direction D2 during hot water supply in the side view of the ladle 100 is more inclined with respect to the vertical direction. According to this, since the discharge direction D2 can be further inclined with respect to the vertical direction, the molten metal M supplied into the sleeve 20 can flow more in the mold direction K. Therefore, scattering from the hot water supply port 21 of the sleeve 20 during hot water supply can be further suppressed.

(Hot water supply method)
Next, an embodiment of the hot water supply method W1 according to the present invention will be described with reference to the drawings. The hot water supply method W1 uses the hot water supply ladle 100 to supply the molten metal M to the hot water supply port 21 of the sleeve 20. In the present embodiment, the four stages of the hot water supply step S10, the transfer step S20, the standby step S30, and the hot water supply step S40 will be described. In FIG. 10, the arm 10 is not shown, and only the ladle 100 is shown.

  The hot water process S <b> 10 is a process of pumping the molten metal M by the ladle 100 and storing the molten metal M in the storage unit 110. Specifically, as shown in FIG. 10, the ladle 100 is rotated from the attitude A1 to the attitude A2 that is rotated backward by the predetermined angle ST1 around the rotation shaft 101a and is positioned above the molten metal holding furnace 30. It moves from the 1st scooping hot water position P10 (equivalent to the scooping hot water position of a claim) to the 2nd scooping hot water position P11. The second drawn hot water position P11 is a position where the ladle 100 is inserted into the molten metal holding furnace 30 in the posture A2. Note that the ladle 100 located at the first scooping hot water position P10 is indicated by a solid line, and the ladle 100 located at the second scooping hot water position P11 is indicated by a dotted line. Here, the second scooping position P11 is such that the ladle 100 has the scooping portion 130 below the top surface of the molten metal M, and the tip portion 121 and the opening 100a are above the top surface of the molten metal M. A predetermined angle ST1 (for example, 15 degrees) is set. Then, after the predetermined time T1 has elapsed, the ladle 100 is moved from the second scooped hot water position P11 to the first scooped hot water position P10, and rotated from the posture A2 to the posture A1. The predetermined time T1 is a time required for the required amount of the molten metal M to be introduced into the storage unit 110.

  In the scooping step S10, the ladle 100 is positioned at the second scooping position P11 in the posture A2, so that the molten metal M is introduced from the scooping portion 130 into the storage portion 110. And the ladle 100 moves to the 1st scooping hot water position P10, and the molten metal M is pumped up. At this time, the ladle 100 is placed in the molten metal holding furnace 30 so that the scooping portion 130 is below the upper surface of the molten metal M, and the tip portion 121 and the opening 100a are above the upper surface of the molten metal M. In addition, as described above, the hot water supply unit 130 opens downward. Accordingly, when the molten metal M is introduced from the scooping portion 130 into the storage portion 110, the oxide film of the molten metal M generated on the upper surface of the molten metal M can be prevented from flowing into the storage portion 110.

  The moving step S20 is a step of moving the ladle 100 from the first scooping hot water position P10 to the hot water supplying position P20 for supplying hot water to the sleeve 20. As shown in FIG. 7, the hot water supply position P20 is a position where the ladle 100 is set to the side of the sleeve 20 and the molten metal M discharged by the ladle 100 flows into the sleeve 20 from the hot water supply port 21 as described above. It is. Further, in the moving step S20, the ladle 100 moves while being maintained in the posture A1. Note that the ladle 100 shown in FIGS. 7 to 9 is located at the hot water supply position P20.

  The standby step S30 is a step of waiting the ladle 100 until hot water supply of the molten metal M is started at the hot water supply position P20. That is, in the standby step S30, the ladle 100 maintains the state where the molten metal M is stored in the storage unit 110 at the hot water supply position P20. And standby process S30 has fine rotation process S31 and fine rotation maintenance process S32.

  The fine rotation step S31 is a step in which the ladle 100 is changed to the posture A3 that is rotated forward from the posture A1 by the predetermined angle ST2 at the hot water supply position P20. The predetermined angle ST2 is such that when the ladle 100 is in the posture A3, one end of the upper surface of the molten metal M stored in the storage part 110 of the ladle 100 is positioned near the lower part of the hot water supply part 120 as shown in FIG. Is set. That is, the fine rotation step S31 is a step of rotating the ladle 100 until one end of the upper surface of the molten metal M stored in the storage portion 110 of the ladle 100 is positioned near the lower portion of the hot water supply portion 120. In the present embodiment, the predetermined angle ST2 is set to 25 degrees, for example.

  The fine rotation maintaining step S32 is a step of maintaining the ladle 100 in the posture A3 until the hot water supply of the molten metal M is started. That is, the fine rotation maintaining step S32 is a step of maintaining the state where the ladle 100 is rotated in the fine rotation step S31.

  The hot water supply step S40 is a step of supplying the molten metal M to the sleeve 20 by rotating the ladle 100. Specifically, the ladle 100 is rotated forward from the posture A3 by a predetermined angle ST3 in response to a hot water supply command from a control device (not shown) of a die casting machine electrically connected to a control device (not shown) of the hot water heater. To the posture A4. The hot water supply command is a control signal for starting hot water supply transmitted to a control device (not shown) of the hot water heater when preparation for injection of the molten metal M such as completion of mold closing is completed in the die casting machine. The predetermined angle ST3 is an angle when the ladle 100 is rotated from the posture A3 to the posture A4. In the present embodiment, the predetermined angle ST3 is set to 50 degrees, for example. In the present embodiment, the angular velocity R of the ladle 100 is rotated at a constant angular velocity R1. The angular velocity R1 is set according to the maximum discharge amount of the molten metal M in the ladle 100, the scattering amount at the time of discharge, and the like. Note that the ladle 100 rotates around the rotation shaft 101a by rotating the rotation shaft 101a by the rotation mechanism of the arm 10. Further, the ladle 100 is moved to the respective positions P10, P11, and P20 by the driving mechanism of the arm 10.

  Next, the posture A and position P of the ladle 100 and the discharge amount Q of the molten metal M discharged by the ladle 100 in the hot water supply method W1 described above will be described along the time chart shown in FIG. A description will be given from a state in which the ladle 100 is positioned at the first scooping hot water position P10 and the molten metal M is not stored in the posture A1.

  In the scooping hot water step S10, the ladle 100 starts to rotate backward from the posture A1 (time t1) and becomes the posture A2 (time t2). In addition, when the ladle 100 starts to rotate from the posture A1, the ladle 100 starts to move from the first pumping hot water position P10, and reaches the second hot water pouring position P11 in the state of the posture A2 (time t3). At this time, the molten metal M flows into the storage unit 110. Then, after a predetermined time T1 has elapsed, the ladle 100 starts moving from the second scooping hot water position P11 (time t4) and reaches the first scooping hot water position P10 (time t5). Further, the ladle 100 rotates until it reaches the posture A1 before reaching the first scooping hot water position P10.

  In the movement step S20, the ladle 100 moves from the first hot water pouring position P10 in the posture A1 (time t5) and reaches the hot water supply position P20 (time t6). Then, in the fine rotation step S31, the ladle 100 starts to rotate forward from the posture A1 and becomes the posture A3 (time t7). At this time, one end of the upper surface of the molten metal M stored in the storage unit 110 is located near the lower part of the hot water supply unit 120. Then, in the fine rotation maintaining step S32, the ladle 100 maintains the posture A3.

  Then, by the hot water supply command from the control device of the die casting machine, that is, in FIG. 12, the hot water supply command is switched from OFF to ON, and the process proceeds from the standby step S30 to the hot water supply step S40 (time t8). The ladle 100 starts to rotate forward from the posture A3 in the hot water supply step S40 (time t8), and rotates at the angular velocity R1 to become the posture A4 (time t9). At this time, since one end of the upper surface of the molten metal M stored in the storage part 110 is located near the lower part of the hot water supply part 120, the ladle 100 starts to rotate from the distal end part 121 to the molten metal M immediately after the ladle 100 starts to rotate. Begins to be discharged (time t8). Then, after the ladle 100 is in the posture A4, all of the molten metal M is discharged from the ladle 100.

  Here, a hot water supply method W2 indicated by a dotted line in FIG. 12 will be described. The hot water supply method W2 is different from the hot water supply method W1 in that the ladle 100 is maintained in the posture A1 without rotating in the standby step S30, and the ladle 100 is rotated from the posture A1 to the posture A4 in the hot water supply step S40. Different. In FIG. 12, the hot water supply method W2 is shown by a solid line together with the hot water supply method W1 except for the portion shown by the dotted line.

  Then, when hot water is supplied to the ladle 100 by the hot water supply method W2, in the hot water supply step S40, the ladle 100 starts to rotate forward from the posture A1 (time t8), and rotates at the angular velocity R1. (Time t10). At this time, the molten metal M stored in the storage unit 110 is not discharged immediately after the rotation of the ladle 100 is started, and starts to be discharged after the rotation starts and the rotation by a predetermined angle ST2 (time t11).

  Next, a hot water supply method W3 indicated by a one-dot broken line in FIG. 12 will be described. The hot water supply method W3 is different from the hot water supply method W2 in that a hot water supply ladle uses a ladle 200 shown in FIG. The ladle 200 is different from the ladle 100 in that the hot water supply part 210 is formed in a groove shape, and the curved surfaces 122a, 122b, 122c and the rectifying part 121b that the ladle 100 has are not formed. Therefore, when hot water is supplied at a higher angular velocity for rotating the ladle 200, the upper side is opened compared to the ladle 100, and therefore the molten metal M is likely to be scattered.

  Furthermore, the hot water supply method W3 is different from the hot water supply method W2 in that the ladle 200 is rotated at the angular velocity R and the angular velocity R2 in the hot water supply step S40. The angular velocity R2 is set according to the maximum discharge amount of the molten metal M in the ladle 200, the scattering amount at the time of discharge, and the like. Here, since the ladle 200 is more likely to scatter the molten metal M than the ladle 100, the angular velocity R2 is set to be smaller than the angular velocity R1. In FIG. 12, the hot water supply method W3 is shown in the same manner as the hot water supply method W2 except for the portion indicated by the one-dot broken line.

  Then, when hot water is supplied to the ladle 200 by the hot water supply method W3, in the hot water supply step S40, the ladle 100 starts to rotate forward from the posture A3 (time t8), and rotates at the angular velocity R2 to become the posture A4. (Time t12). Here, since the angular velocity R2 is smaller than the angular velocity R1, the time t12 is a time after the time t10. Accordingly, the discharge amount Q per unit time becomes small.

  According to the present embodiment, since the ladle 100 for supplying the molten metal M in a short time is used by turning the molten metal M during hot water supply by the curved surface formed in the hot water supply unit 120, the angular velocity for rotating the hot water supply ladle 100 during hot water supply is used. R can be increased. Therefore, the cycle time during hot water supply can be shortened. Specifically, when the hot water supply method W3 is compared with the hot water supply method W2 in which the ladle and the angular velocity R are different from those of the hot water supply method W3, the difference in time during which the ladle 100 rotates from the posture A1 to the posture A4 ( Time) from time t10 to time t12 can be shortened.

  Further, the fine rotation step S31 rotates the hot water supply ladle 100 until one end of the upper surface of the molten metal M stored in the storage unit 110 is positioned near the lower part of the hot water supply unit 120 before starting the hot water supply. The molten metal M can be immediately discharged to the hot water supply ladle 100 after the hot water supply is started. Therefore, the cycle time during hot water supply can be further shortened. Specifically, when the hot water supply method W2 is compared with the hot water supply method W1 obtained by adding the fine rotation step S31 to the hot water supply method W2, the difference in time until the ladle 100 in the hot water supply step S40 discharges the molten metal M ( (Time from time t8 to time t11) can be shortened.

  In the above-described embodiment, an example of the hot water supply ladle and the hot water supply method has been described. However, the present invention is not limited to this, and other configurations may be employed. For example, the angle at which the ladle 100 is rotated from the posture A1 to the posture A4 may be reduced. That is, the hot water supply unit 120 and the inner surface 110a are formed so as to reduce the predetermined angle ST3 and the predetermined angle ST4. According to this, since the time until the ladle 100 is rotated from the posture A1 to the posture A4 is shortened, the cycle time during hot water supply can be further shortened.

  In addition, the present invention is not limited to the cold chamber die casting machine in the present embodiment, and any apparatus that uses a hot water supply ladle can be applied.

  DESCRIPTION OF SYMBOLS 10 ... Arm, 20 ... Sleeve, 21 ... Hot water inlet, 22 ... Axis line, 30 ... Molten metal holding furnace, 100 ... Hot water supply ladle, 100a ... Opening part, 101a ... Rotating shaft, 110 ... Storage part, 110a ... Inner surface, 120 ... Hot water supply part 121 ... tip part 121a ... axis line 121b ... rectification part 121ba ... rectification surface 121bb ... rectification surface 122 ... introduction part 122a ... first curved surface 122b ... second curved surface 122c ... third curved surface 130 ... Pump hot water part, 200 ... Ladle, A1, A2, A3, A4 ... Attitude, AF1, AF2 ... Angle, F1 ... First molten metal flow, F2 ... Second molten metal flow, F3 ... Third molten metal flow, M ... Molten metal , P10: first scooping hot water position (assembled hot water position), P20: hot water feeding position, S10: scooping hot water process, S20 ... moving process, S30 ... standby process, S31 ... fine turning process, S32 ... fine turning maintaining process, S40 ... Hot water supply process, W1 W2, W3 ... hot water supply method.

Claims (4)

A reservoir for storing molten metal;
A hot water supply section formed to protrude outwardly above the storage section;
A hot water supply ladle that is disposed so as to intersect the protruding direction of the hot water supply section and includes a rotating shaft that rotates the storage section and the hot water supply section in order to supply the molten metal to the hot water supply section. ,
The hot water supply unit includes a tip part that discharges the molten metal, and an introduction part that is formed between the storage part and the tip part,
The introduction part is formed so as to be convex inwardly on one inner side in the rotation axis direction and a first curved surface formed to be inwardly convex in the other side in the rotation axis direction. A second curved surface, and a third curved surface connected to the first curved surface on the upstream side in the flow direction of the first molten metal flow flowing along the first curved surface ,
The first curved surface curvature are formed larger than the curvature of the second curved surface, and, by Rukoto curvature of the third curved surface is formed at smaller curvature than the curvature of the second curved surface, before Symbol first molten metal The angle between the flow direction of the flow and the protruding direction is larger than the angle between the flow direction of the second molten metal flow flowing along the second curved surface and the protruding direction, and the first molten metal flow and the second molten metal flow by preparative merge, the melt flowing through the tip to pivot with respect to the protruding direction, the hot water supply ladle. 2. The hot water supply ladle according to claim 1, wherein the tip portion is formed in a square shape on an inner bottom surface, and has a rectifying portion that rectifies the discharge direction of the molten metal in a predetermined direction when the discharge amount of the molten metal is a predetermined value or less. The hot water supply part is a sleeve in a die casting machine,
In the top view of the die casting machine, when the protruding direction and the axial direction of the sleeve are different,
The hot water supply ladle according to claim 1 or 2 , wherein the tip portion is formed so as to be bent in an axial direction of the sleeve. A hot water supply method using the hot water supply ladle according to any one of claims 1 to 3 , wherein the molten metal is supplied to the hot water supply portion.
A hot water pumping process for pumping up the molten metal by the hot water supply ladle;
A moving step of moving the hot water supply ladle from a hot water position for pumping the molten metal to a hot water supply position for supplying hot water to the hot water supply part;
A standby step of waiting for the hot water supply ladle until the hot water supply of the molten metal is started at the hot water supply position;
A hot water supply step of hot water supply to the hot water supply part by rotating the hot water supply ladle,
The waiting step, one end of the upper surface of the molten metal stored in the storing portion of the hot water supply ladle, and fine rotation step of rotating the hot water supply ladle to be located near the lower portion of the hot water supply unit, the fine And a fine rotation maintaining step of maintaining the state where the hot water supply ladle is rotated in the rotation step.

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