Ladle

Abstract

To provide a ladle that can reduce pressure when pouring molten metal.SOLUTION: A ladle 100 for pouring molten metal into an analyzer includes a receptacle for holding collected molten metal, comprising a bottom surface 11 and a side surface 12 connected to the bottom surface and inclined outward from the bottom surface to the outer periphery of the bottom surface, and a spout 20 for pouring the molten metal held in the receptacle, comprising a spout provided on the side surface and extending outward. The spout has a flow channel surface 21 that guides the molten metal when pouring the molten metal held in the receptacle, and a wall surface 22 that stands at the end opposite to the side surface out of both ends of the flow channel surface and guides the molten metal when pouring the molten metal held in the receptacle.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a ladle. [Background technology]

[0002] 2. Description of the Related Art In die casting, a technique is known in which a ladle having a cylindrical spout, as described in Patent Document 1, is used to scoop up molten metal and pour the molten metal into a mold for casting. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-210551 A Summary of the Invention [Problem to be solved by the invention]

[0004] In die casting, it is known that before pouring molten metal into a die, a mold wash is applied to protect the surface of the die and prevent seizure. For the purpose of quality assurance of casting, the inventors tried to prepare a measurement sample by pouring molten metal onto the formed mold wash film, and to measure the wear amount and tensile strength of the mold wash film using the prepared sample. However, when pouring molten metal using a conventional ladle, there is a risk that the mold wash film will peel off due to the pressure applied to the mold wash film by the molten metal when pouring the molten metal. Therefore, a technology that can reduce the pressure when pouring molten metal has been desired. [Means for solving the problem]

[0005] The present disclosure has been made to solve the above-mentioned problems, and can be realized in the following forms. According to one embodiment of the present disclosure, there is provided a ladle for pouring molten metal into an analysis device. The ladle includes a container for containing the collected molten metal, the container having a bottom and a side connected to the bottom and inclined from the bottom to the outside of the outer periphery of the bottom, and an opening at an upper portion opposite the bottom, and a spout for pouring the molten metal contained in the container, the spout being provided on the side and extending outward. The spout has a flow path surface for guiding the molten metal contained in the container when pouring it, and a wall surface erected at the end opposite the side surface among both ends of the flow path surface, the wall surface for guiding the molten metal contained in the container when pouring it, and the upper portion opposite the flow path surface is open and continuous with the upper portion of the container.

[0006] According to one embodiment of the present disclosure, there is provided a ladle for pouring molten metal into an analysis device. The ladle includes a container for containing the collected molten metal, the container having a bottom and a side surface connected to the bottom surface and inclined outward from the bottom surface, and a spout for pouring the molten metal contained in the container, the spout being provided on the side surface and extending outward beyond the outer periphery of the bottom surface of the container. The spout has a flow path surface for guiding the molten metal contained in the container when pouring it, and a wall surface erected at one end of the flow path surface opposite to the side surface, the wall surface for guiding the molten metal contained in the container when pouring it. In this embodiment, since the spout has a wall surface, the molten metal flowing through the flow passage surface becomes turbulent due to the wall surface, and the momentum is dispersed before pouring, so that the pressure applied to the analysis device when pouring the molten metal can be reduced.

[0007] The present disclosure can be realized in various forms, for example, in the form of an analytical device equipped with a ladle. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a diagram showing a schematic configuration of a ladle. [Diagram 2] FIG. 2 is a cross-sectional view showing a schematic cross section of a ladle. [Diagram 3] 1 is a flowchart showing an example of a test. [Figure 4] FIG. 11 is an explanatory diagram of the process of step S120. [Diagram 5] FIG. 11 is another explanatory diagram of the process of step S120. [Figure 6] FIG. 11 is an explanatory diagram of the process of step S140. [Figure 7] FIG. 11 is an explanatory diagram of the process of step S150. [Figure 8] FIG. 2 is an explanatory diagram of the test piece as viewed from the Z-axis direction. [Figure 9]13 is a graph showing the measurement results of wear change in a comparative example. [Figure 10] 4 is a graph showing the measurement results of wear change in the present embodiment. [Figure 11] 13 is a graph showing the measurement results of release resistance in a comparative example. [Figure 12] 1 is a graph showing the measurement results of release resistance in the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A. First embodiment: Fig. 1 is a diagram showing a schematic configuration of a ladle 100 in one embodiment of the present disclosure. Fig. 2 is a cross-sectional view showing a schematic cross section of the ladle 100. The ladle 100 pours molten metal MM into an analysis device 200. The ladle 100 includes a container 10, a spout 20, a handle 30, and a stopper 40. Details of the analysis device 200 will be described later.

[0010] The storage section 10 stores the collected molten metal MM. The storage section 10 has a bottom surface 11 and a side surface 12. The bottom surface 11 is a surface that becomes the bottom when storing the molten metal MM. The side surface 12 is a surface that is connected to the bottom surface 11 and is inclined from the bottom surface 11 toward the outside of the outer periphery of the bottom surface 11. The inclination angle of the side surface 12 is preferably in the range of 95 degrees or more and 150 degrees or less, assuming that the bottom surface direction is 0 degrees. In this embodiment, the storage section 10 is open at the top, which is the opposite side to the bottom surface 11.

[0011] The spout 20 is a portion for pouring the molten metal MM contained in the storage section 10. The spout 20 is provided on the side surface 12 of the storage section 10, and extends outward beyond the outer periphery of the bottom surface 11 of the storage section 10. The spout 20 is preferably provided on the upper side of the storage section 10. More specifically, the spout 20 is provided so that when the storage section 10 contains a predetermined amount of molten metal MM, the molten metal MM can be poured from the spout 20 by tilting the ladle 100. The spout 20 has a flow path surface 21 and a wall surface 22.

[0012] The flow path surface 21 is a surface that guides the molten metal MM when pouring the molten metal MM contained in the container 10. "Guide" means to move the molten metal MM along the surface. The wall surface 22 is a surface that stands on one of the ends of the flow path surface 21 opposite to the side surface 12. The wall surface 22 guides the molten metal MM contained in the container 10 when pouring the molten metal MM. The wall surface 22 has a dimension that changes the flow direction of the molten metal MM guided by the flow path surface 21. In this embodiment, the wall surface 22 is provided so that the angle with respect to the flow path surface 21 is in the range of 90 degrees or more and 120 degrees or less. It is more preferable that the angle of the wall surface 22 with respect to the flow path surface 21 is in the range of 100 degrees or more and 110 degrees or less. In this embodiment, the spout 20 is open at the upper part opposite to the flow path surface 21 and is continuous with the upper part of the container 10.

[0013] In this embodiment, the handle 30 is provided on the side surface 12 of the storage unit 10. More specifically, the handle 30 is provided at a position on the side surface 12 that does not face the spout 20. The handle 30 is provided so that the molten metal MM can be poured from the spout 20 by holding the handle 30 and tilting the ladle 100.

[0014] The stopper 40 is a member that is attached to the handle 30 and extends in a predetermined direction. The stopper 40 is provided at a position and angle such that, when the ladle 100 is tilted so that the stopper 40 is horizontal, the molten metal MM contained in the container 10 is discharged to a desired amount.

[0015] 3 is a flow chart showing an example of a test. This test is performed to evaluate a wash film formed by applying a wash to a test piece 210 provided in the analysis device 200.

[0016] In step S100, a mold wash is applied to the fixed test piece 210. The test piece 210 is, for example, a plate-like member made of the same metal material as the mold used in casting. The mold wash is, for example, the same mold wash as that used in casting, and is applied to the test piece 210 under the same conditions as when it is applied to the mold in casting. In this embodiment, the mold wash is applied to the test piece 210 by spraying so that the film thickness of the mold wash is 200 μm. The application of the mold wash is not limited to spraying, and may be applied by brush, for example.

[0017] In step S110, the measurement ring 230 is placed on the test piece 210 to which the mold wash has been applied in step S100. More specifically, the measurement ring 230 is placed on the mold wash film 220 formed on the test piece 210. The measurement ring 230 is a cylindrical member.

[0018] In step S120, the molten metal MM is collected by the ladle 100. In this embodiment, the ladle 100 scoops up the molten metal MM from the molten metal contained in the holding furnace. Note that the order of steps S120, S100, and S110 is not limited to this, and they can be performed in any order, or even in parallel.

[0019] 4 and 5 are explanatory diagrams of the process of step S120. First, as shown in the upper part of FIG. 4, a sufficient amount of molten metal MM is drawn into the container 10. A sufficient amount is, for example, an amount that is drawn by putting the ladle 100 into the molten metal so that the side surface 12 is submerged in the molten metal. Next, as shown in the lower part of FIG. 4, the handle 30 is brought into contact with the wall 300 of the holding furnace, and the ladle 100 is tilted so that the stopper 40 is in contact with the wall 300. The ladle 100 is tilted in such a direction that the spout 20 is on the upper side of the ladle 100 so that the molten metal MM is not discharged from the spout 20. As shown in FIG. 5, the handle 30 is inclined outward from the surface of the molten metal MM that contacts the liquid surface of the molten metal MM. This allows excess molten metal MM to be discharged from the container 10, and the ladle 100 can collect the desired amount of molten metal MM.

[0020] In step S130 (see FIG. 3), the molten metal MM collected in step S120 is poured into the measurement ring 230 installed in step S110.

[0021] FIG. 6 is an explanatory diagram of the process of step S140 (see FIG. 3). FIG. 6 shows an X-axis, a Y-axis, and a Z-axis which are perpendicular to each other. The X-axis and the Y-axis are the planar directions of the test piece 210, and the Z-axis is the stacking direction of the test piece 210 and the measurement ring 230. These axes correspond to the axes shown in FIG. 6 and subsequent figures. In step S140, a weight 240 is placed on the solidified molten metal MM poured in step S130. In this embodiment, the weight of the weight 240 is, for example, about 10 kg. The weight of the weight 240 is such that the load applied to the mold wash film 220 is the load actually applied to the mold wash film 220 during casting.

[0022] 7 is an explanatory diagram of the process of step S150 (see FIG. 3). In step S150, the wear amount and release resistance of the mold wash film 220 are measured. In this embodiment, the motor 250 pulls the measuring ring 230 in the X-axis direction, the wear amount is measured from the amount of reduction in the thickness of the mold wash film 220, and the release resistance is measured from the frictional force at which the measuring ring 230 starts to move.

[0023] FIG. 8 is an explanatory diagram of the test piece 210 as viewed from the Z-axis direction. In this embodiment, as shown in FIG. 8, changes in wear amount are measured at five positions P1, P2, P3, P4, and P5 located in the measurement ring 230 of the test piece 210. FIG. 9 is a graph showing changes in wear amount in a comparative example, and FIG. 10 is a graph showing changes in wear amount in this embodiment. FIG. 9 shows, as a comparative example, a measurement result of changes in wear amount when molten metal MM is poured into the measurement ring 230 using a conventional ladle. The horizontal axis of the graphs shown in FIG. 9 and FIG. 10 indicates the number of measurements, and the vertical axis indicates the film thickness, which is the thickness of the mold wash film 220. The above-mentioned processes of steps S130 to S150 (see FIG. 3) are repeated five times, and the results at each of the positions P1 to P5 are shown. The graph with solid white circles shows the results at position P1, the graph with dashed white circles shows the results at position P2, the graph with dashed white circles shows the results at position P3, the graph with solid black circles shows the results at position P4, and the graph with dashed black circles shows the results at position P5.

[0024] The thickness of the mold wash film 220 when the number of measurements is 0 is the thickness of the mold wash film 220 before pouring the molten metal MM. The greater the number of measurements, the thinner the film thickness. The variation in the amount of change in film thickness at each of the positions P1 to P5 in the comparative example is greater than the variation in the amount of change in film thickness at each of the positions P1 to P5 in this embodiment. Compared to the comparative example, the ladle 100 of this embodiment can reduce the pressure that the mold wash film 220 receives when pouring the molten metal MM into the test piece 210, so the variation in the amount of change in film pressure at each of the positions P1 to P5 is smaller. Therefore, in this embodiment, the variation in wear of the mold wash film 220 is suppressed compared to the comparative example.

[0025] Fig. 11 is a graph showing the measurement results of the demolding resistance in the comparative example, and Fig. 12 is a graph showing the measurement results of the demolding resistance in this embodiment. The horizontal axis of the graphs shown in Figs. 11 and 12 indicates time, and the vertical axis indicates temperature and demolding resistance. "Mold release resistance" is a resistance value, and is the force (Kgf) with which the motor 250 pulls the measuring ring 230. Graphs Gr1a and Gr2a indicate the demolding resistance, and graphs Gr1b and Gr2b indicate the temperature of the test piece 210. At timing t1, pouring of the molten metal MM is started, and it is waited until the molten metal MM solidifies, and at timing t2, pulling of the measuring ring 230 is started.

[0026] The peaks of the graphs Gr1a and Gr2a are the resistance values ​​at the moment when the motor 250 starts to flick the measuring ring 230 and the measuring ring 230 starts to move. The resistance value F2 which is the peak of the graph Gr2a in this embodiment is smaller than the resistance value F1 which is the peak of the graph Gr1a in the comparative example. As shown in FIG. 8 and FIG. 9, the present embodiment has smaller variations in the film pressure at the positions P1 to P5 of the mold wash film 220 than the comparative example. Therefore, the present embodiment has smaller release resistance than the comparative example because the measuring ring 230 is less likely to get caught on the mold wash film 220.

[0027] According to the ladle 100 of the present embodiment described above, since the spout 20 has a wall portion, the molten metal MM flowing along the flow path surface 21 is turned into a turbulent flow by the wall surface 22, and the momentum is dispersed before being poured. Therefore, when the molten metal MM is poured, the pressure that the wash agent film 220 formed on the test piece 210 of the analysis device 200 receives can be reduced.

[0028] In addition, the side surface 12 is inclined outward from the outer periphery of the bottom surface 11. Therefore, the molten metal MM contained in the container 10 can be poured from the spout 20 simply by tilting the ladle 100 slightly.

[0029] In addition, because the spout 20 extends from the container 10, the distance between the spout 20 and the test piece 210 can be reduced when pouring the molten metal MM. This reduces the pressure that the wash film 220 formed on the test piece 210 of the analysis device 200 receives when pouring the molten metal MM.

[0030] B. Other embodiments: In the above-described embodiment, the spout 20 is open at the top, which is opposite the flow path surface 21. Alternatively, the spout 20 may not be open at the top, which is opposite the flow path surface 21, and may be, for example, cylindrical.

[0031] The present disclosure is not limited to the above-mentioned embodiment, and can be realized in various configurations without departing from the spirit of the present disclosure. For example, the technical features in the embodiments corresponding to the technical features in each form described in the Summary of the Invention column can be appropriately replaced or combined in order to solve the above-mentioned problems or to achieve some or all of the above-mentioned effects. Furthermore, if the technical feature is not described as essential in this specification, it can be appropriately deleted. [Explanation of symbols]

[0032] 10: container, 11: bottom, 12: side, 20: spout, 21: flow path surface, 22: wall, 30: handle, 40: stopper, 100: ladle, 200: analyzer, 210: test piece, 220: coating agent film, 230: measuring ring, 240: weight, 250: motor, 300: wall

Claims

[Claim 1] A ladle for pouring molten metal into an analytical device, comprising: a container for containing the collected molten metal, the container comprising a bottom surface and a side surface connected to the bottom surface and inclined from the bottom surface toward an outer side of the outer periphery of the bottom surface, the top surface being open on the opposite side to the bottom surface; a pouring spout for pouring the molten metal contained in the container, the pouring spout being provided on the side surface and extending outward; The spout is a flow path surface that guides the molten metal when the molten metal contained in the container is poured; a wall surface provided at one end of the flow path opposite to the side surface, the wall surface guiding the molten metal when the molten metal contained in the container is poured, A ladle whose upper portion, opposite the flow path surface, is open and continuous with the upper portion of the storage section.

Images