A casting material ladle and its manufacturing method

Abstract

The present invention relates to the technical field of castable ladles and discloses a castable ladle and a manufacturing method thereof, comprising a ladle and a shell, wherein the inner cavity of the ladle is formed by resin sand, a core bone is placed in the sand core of the resin sand, a steel pipe is fixedly installed on the upper part of the core bone, the steel pipe can be overlapped on the top of the shell, threaded holes are arranged on both sides of the steel pipe, bolts are threadedly connected in the threaded holes, and the steel pipe is fixed to the top of the shell by bolts. In the present invention, the inner cavity of the ladle is formed by resin sand, the operation is simple and practical, the effect is reliable, and it is suitable for the production of ladles with complex inner cavity shapes. The castable is baked by a staged uniform heating and staged heat preservation method, and its moisture is dried to a greater extent. Threaded holes are arranged on both sides of the steel pipe, and the steel pipe, the core bone and the sand mold are fixed to the top of the shell by bolts, which effectively prevents the steel pipe, the core bone and the sand mold from sliding and having an adverse effect on the castable ladle.

Description

Technical Field

[0001] The invention relates to the technical field of casting material ladles, in particular to a casting material ladle and a manufacturing method thereof. Background Art

[0002] The ladle is used for casting in the foundry workshop. After receiving the molten metal in front of the furnace, it is transported to the casting mold by a crane for casting. It is divided into various styles such as iron ladle, steel ladle, teapot ladle, ductile iron ladle, etc. The ladle suspension rod and ring are forged, which is stronger and safer than ordinary steel plate cutting. At the same time, the ladle capacity and material are made according to the national machinery industry standards. There is no knocking and gear jamming phenomenon. The gearbox adopts a double worm gear pair transmission. Although the manufacturing requirements are high, the transmission is flexible and free, and the two-way reversibility is good. The existing casting material ladle generally uses a mold made of steel plate. The mold made of steel plate is complicated to make, the mold cost is high, and complex shapes cannot be made. At the same time, it is inconvenient to operate. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a castable ladle and a method for making the same, which have the advantages of simple and practical operation, reliable effect, and are suitable for making ladles with complex inner cavity shapes. It solves the problem that the existing castable ladles generally use molds made of steel plates, which are complex to make, have high mold costs, cannot make complex shapes, and are inconvenient to operate.

[0004] The present invention provides the following technical solution: a casting material ladle, comprising a ladle and a cladding shell, wherein the inner cavity of the ladle is formed by resin sand, a core bone is placed in the sand core of the resin sand, a steel pipe is fixedly installed on the upper part of the core bone, the steel pipe can be overlapped on the top of the cladding shell, threaded holes are arranged on both sides of the steel pipe, bolts are threadedly connected in the threaded holes, and the steel pipe is fixed to the top of the cladding shell by the bolts.

[0005] Preferably, the core bone is cylindrical.

[0006] Preferably, the core bone is connected to the steel pipe by welding.

[0007] Preferably, there are two steel pipes, and each of the steel pipes is in a rectangular shape.

[0008] A method for making a casting ladle: the inner cavity of the ladle is formed by resin sand, a core bone is placed in the resin sand core, the core bone body is cylindrical, a steel pipe is welded on the upper part, the steel pipe is rectangular, and the steel pipe can be overlapped on the cladding. After the sand core is made, paint is applied and it is fixed to the cladding with bolts to prevent it from moving. Then, the casting material is poured in, the casting material is solidified and dried in the shade, the core bone is taken out, and the sand core is baked with a ladle drying device. The resin sand remaining in the ladle is poured out from the ladle after being heat-dissipated, and the casting material is continued to be baked and sintered with the ladle drying device to finally obtain a casting ladle.

[0009] Preferably, the method specifically comprises the following steps:

[0010] 1. Design the sand core and make the corresponding resin sand core box according to the designed sand core.

[0011] 2. After the resin sand core box is made, start making the core bone. The main body of the core bone is cylindrical, and the steel pipe is welded to the upper part of the core bone. Then put the core bone into the core box, and overlap the steel pipe on the cladding. Then pour resin sand into the core box to allow the resin sand to cure naturally. The curing time of the resin sand should be more than 12 hours to achieve the best strength. The specific time can be controlled according to the actual working environment and the temperature in the environment. After the resin sand is cured, take it out of the core box, and paint the inner cavity forming surface of the ladle to become the sand mold used for the ladle.

[0012] 3. Assemble, put the core bone into the cladding, adjust the position, and use bolts to fix the steel pipe to the cladding. Because the steel pipe, core bone and sand mold are integrated, the sand mold is fixed in the cladding to complete the assembly.

[0013] 4. After assembly, pour the castable into the cladding. Pour the castable into the space between the inner wall of the cladding and the outer wall of the sand mold. Insert a funnel-shaped device between the inner wall of the cladding and the outer wall of the sand mold to assist and prevent the castable from leaking during the pouring process.

[0014] 5. After pouring the castable, wait for more than 20 hours to allow the castable to solidify naturally and dry in the shade.

[0015] 6. After the castable is solidified, loosen the bolts, pull the steel pipe upward to take out the core bone, and use the drying bag to bake the bottom of the shell to bake and fix the castable. During the baking process, the temperature is evenly increased and kept in a staged manner to dry the moisture to a greater extent. First, the heating temperature is gradually adjusted from 0°C to 100°C within 2 hours, and then kept at 100°C for 2 hours, and then the temperature is gradually adjusted from 100°C to 300°C within 2 hours, and then kept at 300°C for 3 hours, and then the temperature is gradually adjusted from 300°C to 500°C within 2 hours, and then kept at 500°C for 3 hours, and then the temperature is gradually adjusted from 500°C to 900°C within 2 hours, and then kept at 900°C for 3 hours, and then the temperature is adjusted from 900°C to 1200°C within 2 hours, and then kept at 1200°C for 3 hours to complete the baking of the castable.

[0016] 7. During the baking process, the resin sand remaining in the ladle will disintegrate as the temperature continues to rise. It can then be poured out from the ladle to finally obtain a castable ladle.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention forms the inner cavity of the ladle with resin sand, which is simple and practical to operate, has a reliable effect, and is suitable for making ladles with complex inner cavity shapes. It solves the problem that the mold made of steel plates is complicated to make, has high mold cost, cannot make complex shapes, and is inconvenient to operate.

[0019] 2. The present invention bakes the castable by uniformly heating up the temperature in stages and keeping the temperature in stages, so that the moisture of the castable can be dried to a greater extent and the drying quality can be improved.

[0020] 3. The present invention provides threaded holes on both sides of the steel pipe and threaded bolts in the threaded holes, and fixes the steel pipe, the core bone and the sand mold to the top of the cladding through the bolts, which can effectively prevent the steel pipe, the core bone and the sand mold from sliding and causing adverse effects on the casting ladle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the front view structure of the casting material ladle of the present invention;

[0022] Figure 2 This is a schematic diagram of the top view of the casting material ladle of the present invention;

[0023] Figure 3 It is a schematic diagram of the process of the present invention.

[0024] In the figure: 1. Sand mold; 2. Core bone; 3. Bolts; 4. Shell; 5. Casting material. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-3The present invention comprises a ladle and a shell 4. The inner cavity of the ladle is formed by resin sand. A core bone 2 is placed in the sand core of the resin sand. The core bone 2 is cylindrical. A steel pipe is fixedly installed on the upper part of the core bone 2. The core bone 2 and the steel pipe are connected by welding. The steel pipe can be overlapped on the top of the shell 4. There are two steel pipes, and the steel pipe is in a rectangular shape. Threaded holes are arranged on both sides of the steel pipe. Bolts 3 are threadedly connected in the threaded holes. The steel pipe is fixed to the top of the shell 4 by the bolts 3. The core bone 2 is placed in the shell 4. After adjusting the position, the steel pipe is fixed to the shell 4 with the bolts 3. Because the steel pipe, the core bone 2 and the sand mold 1 The cladding 4 is integrated, that is, the sand mold 1 is fixed in the cladding 4, so as to complete the assembly. The steel pipe, the core bone 2 and the sand mold 1 are fixed to the top of the cladding 4 by bolts 3, which can effectively prevent the steel pipe, the core bone 2 and the sand mold 1 from sliding, and adversely affect the casting ladle. After the assembly is completed, the casting material 5 is poured into the cladding 4. When pouring, the casting material 5 is poured between the inner wall of the cladding 4 and the outer wall of the sand mold 1. A funnel-shaped device is inserted between the inner wall of the cladding 4 and the outer wall of the sand mold 1 to assist, so as to prevent the casting material 5 from leaking during the pouring process. After pouring the casting material 5, wait for more than 20 hours to allow the casting material 5 to naturally solidify and dry in the shade. After the casting material 5 is solidified After forming, loosen the bolt 3, pull the steel pipe upward to take out the core bone 2, and use the ladle drying device to bake the bottom of the cladding 4 to bake and fix the castable 5. First, gradually adjust the heating temperature from 0°C to 100°C within 2 hours, then keep it at 100°C for 2 hours, then gradually adjust the temperature from 100°C to 300°C within 2 hours, then keep it at 300°C for 3 hours, then gradually adjust the temperature from 300°C to 500°C within 2 hours, then keep it at 500°C for 3 hours, then gradually adjust the temperature from 500°C to 900°C within 2 hours, and then keep it at 900°C. The temperature is kept constant at 900°C for 3 hours, and then the temperature is adjusted from 900°C to 1200°C within 2 hours, and then kept constant at 1200°C for 3 hours to complete the baking of the castable 5. By baking the castable 5 in a stage-by-stage uniform heating and stage-by-stage insulation manner, its moisture can be dried to a greater extent and the drying quality can be improved. During the baking process, the resin sand remaining in the ladle is disintegrated by heat as the temperature continues to rise, and can be poured out from the ladle to finally obtain a castable ladle, which is formed by the inner cavity of the ladle with resin sand. The operation is simple and practical, the effect is reliable, and it is suitable for the production of ladles with complex inner cavity shapes.

[0027] Working principle: First, the sand core needs to be designed, and the corresponding resin sand core box is made according to the designed sand core. After the resin sand core box is made, the core bone 2 is made. The main body of the core bone 2 is cylindrical, and the steel pipe is welded to the upper part of the core bone 2. Then the core bone 2 is placed in the core box, and the steel pipe is overlapped on the cladding. Then, resin sand is poured into the core box to allow the resin sand to solidify naturally. The curing time of the resin sand should be more than 12 hours to achieve the best strength. The specific time can be controlled according to the actual working environment and the temperature in the environment. After the resin sand is solidified After that, it is taken out from the core box, and the inner cavity forming surface of the ladle is painted to become the sand mold 1 used for the ladle. Then the core bone 2 is placed in the cladding 4. After adjusting the position, the steel pipe is fixed to the cladding 4 with bolts 3. Because the steel pipe, the core bone 2 and the sand mold 1 are integrated, the sand mold 1 is fixed in the cladding 4 to complete the assembly. After the assembly is completed, the casting material 5 is poured into the cladding 4. When pouring, the casting material 5 is poured between the inner wall of the cladding 4 and the outer wall of the sand mold 1. A funnel-shaped device is inserted between the inner wall of the cladding 4 and the outer wall of the sand mold 1 to assist, so as to prevent the casting material 5 from pouring. After pouring the casting material 5, wait for more than 20 hours to allow the casting material 5 to solidify naturally and dry in the shade. After the casting material 5 is solidified and formed, loosen the bolts 3, pull the steel pipe upward to take out the core bone 2, and use the drying bag to bake the bottom of the cladding 4 to bake and fix the casting material 5. First, gradually adjust the heating temperature from 0°C to 100°C within 2 hours, then keep it at 100°C for 2 hours, then gradually adjust the temperature from 100°C to 300°C within 2 hours, then keep it at 300°C for 3 hours, and then heat it up again. The temperature is gradually adjusted from 300°C to 500°C within 2 hours, and then maintained at 500°C for 3 hours, and then the temperature is gradually adjusted from 500°C to 900°C within 2 hours, and then maintained at 900°C for 3 hours, and then the temperature is adjusted from 900°C to 1200°C within 2 hours, and then maintained at 1200°C for 3 hours, to complete the baking of the castable 5. During the baking process, the resin sand remaining in the ladle is dispersed by the heat as the temperature continues to rise, and can be poured out from the ladle to finally obtain a castable ladle.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for making a casting material ladle, characterized in that: The ladle comprises a shell (4), the inner cavity of the ladle is formed by resin sand, a core bone (2) is placed in the resin sand core, the core bone (2) is cylindrical, a steel pipe is welded on the upper part, the steel pipe is rectangular, and the steel pipe can be overlapped on the shell (4), after the sand core is made, paint is applied, and the steel pipe is fixed to the shell with bolts (3) to prevent it from moving, and then the casting material is poured in, the casting material is solidified and dried in the shade, the core bone (2) is taken out, and the sand core is baked with a ladle drying device, and the resin sand remaining in the ladle is poured out from the ladle after being heat-dissipated, and the casting material is further baked and sintered with the ladle drying device, and finally a casting material ladle is obtained; The specific steps include:

1. Design the sand core and make the corresponding resin sand core box according to the designed sand core; 2. After the resin sand core box is made, the core bone (2) is made. The main body of the core bone (2) is cylindrical, and the steel pipe is welded to the upper part of the core bone (2). Then, the core bone (2) is placed in the core box, and the steel pipe is overlapped on the cladding. Then, resin sand is poured into the core box to allow the resin sand to solidify naturally. The solidification time of the resin sand is more than 12 hours. After the resin sand is solidified, it is taken out from the core box, and the formed surface is painted to become the sand mold (1) used for the ladle.

3. Assemble, place the core bone (2) into the cladding (4), adjust the position, and use bolts (3) to fix the steel pipe to the cladding (4). Since the steel pipe, the core bone (2) and the sand mold (1) are integrated, the sand mold (1) is fixed in the cladding (4), thereby completing the assembly; 4. After the assembly is completed, pour the casting material (5) into the cladding (4). When pouring, pour the casting material (5) into the space between the inner wall of the cladding (4) and the outer wall of the sand mold (1). Insert a funnel-shaped device between the inner wall of the cladding (4) and the outer wall of the sand mold (1) to assist and prevent the casting material (5) from spilling during the pouring process.

5. After pouring the castable (5), wait for more than 20 hours to allow the castable (5) to solidify naturally and dry in the shade; 6. After the castable (5) is solidified, the bolts (3) are loosened, and the core bone (2) is taken out by pulling the steel pipe upwards. The bottom of the cladding (4) is baked with a cladding drying device to bake and fix the castable (5). During the baking process, the castable (5) is baked in a staged uniform heating and staged heat preservation manner to dry out the moisture to a greater extent. First, the heating temperature is gradually adjusted from 0°C to 100°C within 2 hours, and then maintained at 100°C for 2 hours, and then the temperature is increased from 100°C to 100°C within 2 hours. ℃ gradually to 300 ℃, then keep 300 ℃ constant for 3 hours, then gradually adjust the temperature from 300 ℃ to 500 ℃ within 2 hours, then keep 500 ℃ constant for 3 hours, then gradually adjust the temperature from 500 ℃ to 900 ℃ within 2 hours, then keep 900 ℃ constant for 3 hours, then adjust the temperature from 900 ℃ to 1200 ℃ within 2 hours, then keep 1200 ℃ constant for 3 hours, to complete the baking of the castable (5); 7. During the baking process, the resin sand remaining in the ladle will disintegrate as the temperature continues to rise. It can then be poured out from the ladle to finally obtain a castable ladle.

2. The method for making a casting material ladle according to claim 1, characterized in that: Threaded holes are provided on both sides of the steel pipe, bolts (3) are threadedly connected in the threaded holes, and the steel pipe is fixed to the top of the cladding (4) by the bolts (3).

3. The method for making a casting ladle according to claim 1, characterized in that: The number of the steel pipes is two.

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