Casting mold for train wheel production

Abstract

The utility model discloses a casting mould for train wheel production, which comprises a sand core mould, a heat exchange mechanism is arranged outside the sand core mould, the heat exchange mechanism comprises two half sleeves which are attached to each other, the two half sleeves are sleeved outside the sand core mould, heat exchange cavities are arranged inside the half sleeves on two sides, and the heat exchange cavities are communicated with the sand core mould. The interiors of the heat exchange cavities in the two sides communicate with each other, the outer surface of the half sleeve on one side is fixedly connected with a heat preservation barrel, the interior of the heat exchange cavity on one side communicates with a pump machine in a penetrating mode, the interior of the heat preservation barrel communicates with a backflow pipe in a penetrating mode, and one end of the backflow pipe communicates with a water inlet pipe in a penetrating mode. The problems that when an existing train wheel casting sand core is used, due to the fact that the existing train wheel casting sand core is located in the external environment, on one hand, cooling shaping efficiency is low, heat is wasted, and on the other hand, the temperature of a mold cavity is low during casting, flowing of molten iron is influenced, and the wheel forming quality is influenced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of railway wheel casting moulds, in particular to a casting mould for railway wheel production. Background Art

[0002] When using the existing sand core, molten iron needs to be poured into the interior of the sand core. At this time, the longer the molten iron is exposed to the air, the more it will cause the molten iron to oxidize and contain inclusions, resulting in a decrease in the quality of the wheel. Therefore, the utility model proposes a sand core for casting train wheels. The sand core for casting train wheels with application number 202122233747X includes: an upper mold and a lower mold for wheel shaping, wherein the upper mold is located above the lower mold; the molten iron will enter the interior of the upper mold and the lower mold along the inner side of the funnel, thereby reducing the exposure time of the molten iron to the air without affecting the entry speed of the molten iron, thereby improving the quality of material production.

[0003] Although the device has the above advantages, it still has certain disadvantages in actual use. Since the sand core is always in the outside world, firstly, during the cooling and shaping process of the wheel, the efficiency of natural heat dissipation is low, and it also causes waste of heat dissipation. Secondly, during the molten iron casting process, the sand core is kept consistent with the external ambient temperature, which leads to a lower temperature in the internal mold cavity, which is not conducive to the flow of molten iron, thereby affecting the quality and efficiency of molding. Therefore, it is necessary to solve the above-mentioned problems that still exist. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a casting mold for the production of railway wheels, which solves the problem that when the existing railway wheel casting sand core is used, due to being in the external environment, on the one hand, the cooling and shaping efficiency is slow and heat is wasted; on the other hand, the mold cavity temperature is low during casting, which affects the flow of molten iron and thus affects the wheel molding quality.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a casting mold for producing train wheels, including a sand core mold, a heat exchange mechanism is arranged on the outside of the sand core mold, the heat exchange mechanism includes two half-shells that fit each other, the two half-shells are arranged on the outside of the sand core mold, heat exchange chambers are opened inside the half-shells on both sides, the insides of the heat exchange chambers on both sides are connected, a heat preservation barrel is fixedly connected to the outer surface of the half-shell on one side, a pump is penetrated and connected to the inside of the heat exchange chamber on one side, a return pipe is penetrated and connected to the inside of the heat preservation barrel, and one end of the return pipe is penetrated and connected to a water inlet pipe One end of the water inlet pipe is connected with the interior of the heat exchange chamber on one side, and a sealing groove is provided on the outer surface of the half sleeve on the other side. A sealing strip is movably connected to the interior of the sealing groove, and the outer surface of the sealing strip is fixedly connected to the outer surface of the half sleeve on one side. The outer surfaces of the two half sleeves are movably connected to a base frame, and both sides of the outer surface of the base frame are fixedly connected to hydraulic rods. The output ends of the hydraulic rods on both sides are respectively fixedly connected to the outer surfaces of the half sleeves on both sides, and the outer surface of the base frame is fixedly connected to a solid column. The outer surface of the solid column is fixedly connected to the outer surface of the sand core mold, and the half sleeves on both sides are arranged on the outside of the solid column.

[0006] Preferably, the output end of the pump is provided with a flow control component, the flow control component comprises a water jacket, the interior of the water jacket is in communication with the output end of the pump, and a drain pipe is in communication with the interior of the water jacket.

[0007] Preferably, a connecting pipe is passed through the interior of the water jacket, and one end of the connecting pipe is passed through and communicated with the interior of the heat preservation barrel.

[0008] Preferably, the water jacket is movably connected to a sealing column inside, and both sides of the outer surface of the sealing column are movably connected to the outer surfaces of the connecting pipe and the drain pipe respectively, and the outer surface of the sealing column is movably connected to a baffle, and the outer surface of the baffle is fixedly connected to one end of the connecting pipe.

[0009] Preferably, the body of the sealing column is provided with two upper and lower through-going connecting grooves, the interiors of the connecting grooves on both sides are respectively connected with the interiors of the connecting pipe and the drain pipe, and the interiors of the connecting grooves on both sides are connected with the interior of the water jacket.

[0010] Preferably, the outer surface of the sealing column is fixedly connected to a support plate, the outer surface of the support plate is movably connected to the inside of the water jacket, the outer surface of the support plate is fixedly connected to a spring rod, one end of the spring rod is fixedly connected to the inside of the water jacket.

[0011] Beneficial Effects

[0012] The utility model provides a casting mold for producing train wheels. Compared with the prior art, it has the following beneficial effects:

[0013] (1) By setting up a heat exchange mechanism and utilizing low-temperature liquid water to flow from bottom to top inside the heat exchange chamber, the heat exchange can be fully performed to improve the efficiency of cooling and shaping. At the same time, the hot water after heat exchange is stored in the insulation barrel through the pump, which not only reduces the heat loss but also realizes the recycling of heat.

[0014] (2) By setting up a flow control component and utilizing the temperature of the flowing liquid water, the expansion and contraction of the output end of the spring rod can be controlled, so that the liquid water can be transported in different directions by utilizing the connecting grooves on both sides through the movement of the sealing column, thereby storing hot water for recycling and discharging low-temperature water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0016] Figure 2 This is a three-dimensional diagram of the external structure of half of the utility model;

[0017] Figure 3 It is a cross-sectional view of the internal structure of the water jacket of the utility model.

[0018] In the figure: 1. sand core mold; 2. half sleeve; 3. heat exchange chamber; 4. insulation barrel; 5. pump; 6. flow control component; 61. water jacket; 62. drain pipe; 63. connecting pipe; 64. sealing column; 65. connecting groove; 66. support plate; 67. spring rod; 68. baffle; 7. return pipe; 8. water inlet pipe; 9. sealing groove; 10. sealing strip; 11. base frame; 12. hydraulic rod; 13. solid column. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a technical solution: a casting mold for producing railway wheels:

[0021] Embodiment 1:

[0022] The invention comprises a sand core mold 1, which is composed of an existing upper mold, a lower mold, a feeding mechanism, and a connecting mechanism. A heat exchange mechanism is arranged outside the sand core mold 1. The heat exchange mechanism comprises two half-cases 2 which fit each other. The inner and outer sides of the half-cases 2 are respectively made of materials with good heat transfer performance, pressure resistance, wear resistance, corrosion resistance, and pressure resistance, wear resistance, corrosion resistance, and heat preservation, and the inner side thickness is set to be thinner to improve the heat exchange efficiency. The two half-cases 2 are arranged outside the sand core mold 1, and heat exchange chambers 3 are opened inside the half-cases 2 on both sides. 3 for liquid water to flow to facilitate heat exchange, the interiors of the heat exchange chambers 3 on both sides are connected, the outer surface of one half sleeve 2 is fixedly connected with a heat preservation barrel 4, the heat preservation barrel 4 is made of pressure-resistant, corrosion-resistant and heat-insulating materials, the interior of the heat exchange chamber 3 on one side is penetrated and connected with a pump 5, the pump 5 is electrically connected to the external control circuit, and the input end extends to the bottom of the interior of the heat exchange chamber 3, the interior of the heat preservation barrel 4 is penetrated and connected with a return pipe 7, the outside of the return pipe 7 is provided with heat preservation measures and a solenoid valve, one end of the return pipe 7 is penetrated and connected with a water inlet pipe 8, the water inlet pipe 8 is provided with heat preservation measures and solenoid valve on the outside, and one end is connected to the external low-temperature liquid water source through a spring hose, one end of the water inlet pipe 8 is connected with the inside of the heat exchange chamber 3 on one side, and a sealing groove 9 is provided on the outer surface of the other half sleeve 2, and a sealing strip 10 is movably connected inside the sealing groove 9. The sealing strip 10 is made of a material that is resistant to pressure, wear, high temperature corrosion and has good sealing performance, which can improve the sealing performance of the two half sleeves 2. The outer surface of the sealing strip 10 is fixedly connected to the outer surface of the half sleeve 2 on one side, and the two half sleeves 2 The outer surface of the base 11 is movably connected to the base frame 11, and hydraulic rods 12 are fixedly connected to both sides of the outer surface of the base frame 11. The hydraulic rods 12 are connected to the external control circuit, and the output ends of the hydraulic rods 12 on both sides are respectively fixedly connected to the outer surfaces of the half sets 2 on both sides. The outer surface of the base frame 11 is fixedly connected to a solid column 13, which is made of a pressure-resistant, wear-resistant and heat-insulating material and is fixedly connected to the outer surface of the lower mold. The outer surface of the solid column 13 is fixedly connected to the outer surface of the sand core mold 1, and the half sets 2 on both sides are arranged on the outside of the solid column 13.

[0023] By setting up a heat exchange mechanism and utilizing low-temperature liquid water to flow from bottom to top inside the heat exchange chamber 3, sufficient heat exchange can be performed to improve the efficiency of cooling and shaping. At the same time, the hot water after heat exchange is pumped by the pump 5 and stored in the insulation barrel 4, which not only reduces heat loss but also realizes the recycling of heat.

[0024] Embodiment 2:

[0025] The output end of the pump 5 is provided with a flow control component 6, which includes a water jacket 61. The water jacket 61 is made of a pressure-resistant, wear-resistant and heat-insulating material, and an electromagnet (not shown in the figure) is provided at the top outside the connecting pipe 63, and the input end of the electromagnet is connected to a thermistor (not shown in the figure) electrically connected to an external control circuit. The thermistor is arranged at the lower part of the water jacket 61. The interior of the water jacket 61 is connected to the output end of the pump 5. The interior of the water jacket 61 is connected to a drain pipe 62. The drain pipe 62 is connected to the drain pipe 62. One end is connected to the external drainage system or low-temperature liquid water source through a spring hose, the interior of the water jacket 61 is penetrated and connected with a connecting pipe 63, the outside of the connecting pipe 63 is provided with a heat preservation measure, and the inside is provided with a one-way flow measure, one end of the connecting pipe 63 is penetrated and connected with the inside of the heat preservation barrel 4, and the inside of the water jacket 61 is movably connected with a sealing column 64, the sealing column 64 is made of a material that is resistant to pressure, wear, high temperature corrosion and has good sealing performance, and the two sides of the outer surface of the sealing column 64 are movably connected to the outer surfaces of the connecting pipe 63 and the drainage pipe 62 respectively The outer surface of the sealing column 64 is movably connected with a baffle 68, which is made of the same material as the sealing column 64 and is arc-shaped and fits the surface of the sealing column 64. The outer surface of the baffle 68 is fixedly connected to one end of the connecting pipe 63. The body of the sealing column 64 is provided with two through-going connecting grooves 65, the cross section of the connecting groove 65 is L-shaped, and the connecting grooves 65 on both sides are arranged to rotate 180° clockwise. At the same time, there is an axial distance between the connecting grooves 65 on both sides, and the interiors of the connecting grooves 65 on both sides are respectively connected to the interiors of the connecting pipe 63 and the drain pipe 62. The interiors of the connecting grooves 65 on both sides are connected with the interior of the water jacket 61. The outer surface of the sealing column 64 is fixedly connected with a support plate 66. The support plate 66 is made of a pressure-resistant, corrosion-resistant and magnetic material, and has a magnetic repulsion effect with the electromagnet. The outer surface of the support plate 66 is movably connected to the interior of the water jacket 61. The outer surface of the support plate 66 is fixedly connected with a spring rod 67. The spring rod 67 is made of a pressure-resistant, wear-resistant, high-temperature corrosion-resistant and fatigue-resistant material. One end of the spring rod 67 is fixedly connected to the interior of the water jacket 61.

[0026] By setting the flow control component 6 and utilizing the temperature of the flowing liquid water, the expansion and contraction of the output end of the spring rod 67 is controlled, so that through the movement of the sealing column 64, the liquid water is transported in different directions by utilizing the connecting grooves 65 on both sides, so that hot water can be stored for recycling and low-temperature water can be discharged.

[0027] Embodiment 3: This embodiment is obtained by combining embodiments 1 and 2, which utilizes low-temperature liquid water for sufficient heat exchange to improve the efficiency of cooling and shaping the train wheels, and by storing hot water to preheat the mold cavity when casting again, heat recycling is achieved, and it is also convenient to improve the quality of casting.

[0028] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] During operation, the upper mold and the lower mold are first closed during pouring, and then the output ends of the hydraulic rods 12 on both sides extend to drive the half sleeves 2 on both sides to approach each other, so as to be sleeved on the outside of the sand core mold 1 and the solid column 13. At the same time, through the connection of the sealing strip 10 and the sealing groove 9, the sealing performance of the heat exchange chambers 3 on both sides is improved, and then casting can be carried out. During the cooling process of the molten iron, the external low-temperature liquid water source enters the heat exchange chamber 3 through the water inlet pipe 8, and slowly rises from bottom to top, which can fully absorb heat from the sand core mold 1, so that The molten iron can be quickly cooled and shaped, and the heated hot water is pumped into the water jacket 61 by the pump 5. Then, due to the temperature effect, the resistance value of the thermistor is changed, so that the current and magnetic force of the electromagnet are increased, thereby increasing the repulsive force between the electromagnet and the support plate 66. The support plate 66 drives the sealing column 64 to descend inside the water jacket 61 and compresses the output end of the spring rod 67, so that the one side connecting groove 65 is connected with the inside of the water jacket 61. The hot water enters the insulation barrel 4 through the one side connecting groove 65 and the connecting pipe 63 for storage. After full heat exchange and cooling of the train wheel, the hydraulic rod 12 drives the half set 2 to move in the opposite direction and reset, and then the sand core mold 1 is opened to take out the wheel embryo, and then the above steps are repeated to close the mold and wrap it with the half set 2. Before casting, the solenoid valves on the water inlet pipe 8 and the return pipe 7 are closed and opened respectively, and then the hot water inside the insulation barrel 4 enters the heat exchange chamber 3 through the return pipe 7 and the water inlet pipe 8, and can fully preheat the mold cavity of the sand core mold 1 by slowly rising, so as to facilitate the flow of molten iron for casting, and then the pump The machine 5 pumps the cooled liquid water into the water jacket 61 again. When the temperature of the liquid water decreases, the resistance of the thermistor increases, so that the repulsive force between the electromagnet and the support plate 66 is smaller than the elastic force of the spring rod 67. Then the output end of the spring rod 67 extends, so that the support plate 66 drives the sealing column 64 to rise inside the water jacket 61, and the baffle plate 68 blocks and seals the one side connecting groove 65, so that the drain pipe 62 is connected to the inside of the water jacket 61 through the other side connecting groove 65, and then the cooled liquid water can be discharged to the outside through the drain pipe 62.

[0030] 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 casting mold for producing railway wheels, comprising a sand core mold (1), characterized in that: A heat exchange mechanism is arranged outside the sand core mold (1), and the heat exchange mechanism comprises two mutually fitting half sleeves (2), the two half sleeves (2) are sleeved on the outside of the sand core mold (1), a heat exchange chamber (3) is provided inside the half sleeves (2) on both sides, the interiors of the heat exchange chambers (3) on both sides are connected, a heat preservation barrel (4) is fixedly connected to the outer surface of the half sleeve (2) on one side, a pump (5) is penetrated inside the heat exchange chamber (3) on one side, a return pipe (7) is penetrated inside the heat preservation barrel (4), one end of the return pipe (7) is penetrated by a water inlet pipe (8), one end of the water inlet pipe (8) is penetrated and connected to the interior of the heat exchange chamber (3) on one side, and the half sleeve (2) on the other side is connected to the heat exchange chamber (3) on the other side. A sealing groove (9) is provided on the outer surface of the half sleeve (2), a sealing strip (10) is movably connected inside the sealing groove (9), the outer surface of the sealing strip (10) is fixedly connected to the outer surface of one half sleeve (2), the outer surfaces of the two half sleeves (2) are movably connected to a base frame (11), both sides of the outer surface of the base frame (11) are fixedly connected to hydraulic rods (12), the output ends of the hydraulic rods (12) on both sides are respectively fixedly connected to the outer surfaces of the half sleeves (2) on both sides, the outer surface of the base frame (11) is fixedly connected to a fixed column (13), the outer surface of the fixed column (13) is fixedly connected to the outer surface of the sand core mold (1), and the half sleeves (2) on both sides are sleeved on the outside of the fixed column (13).

2. The casting mold for railway wheel production according to claim 1, characterized in that: The output end of the pump (5) is provided with a flow control component (6), the flow control component (6) comprises a water jacket (61), the interior of the water jacket (61) is in continuous communication with the output end of the pump (5), and a drainage pipe (62) is in continuous communication with the interior of the water jacket (61).

3. The casting mold for railway wheel production according to claim 2, characterized in that: A connecting pipe (63) penetrates and communicates with the interior of the water jacket (61), and one end of the connecting pipe (63) penetrates and communicates with the interior of the heat preservation barrel (4).

4. The casting mold for railway wheel production according to claim 3, characterized in that: The water jacket (61) is movably connected to a sealing column (64) inside, and the two sides of the outer surface of the sealing column (64) are movably connected to the outer surfaces of the connecting pipe (63) and the drain pipe (62) respectively. The outer surface of the sealing column (64) is movably connected to a baffle (68), and the outer surface of the baffle (68) is fixedly connected to one end of the connecting pipe (63).

5. The casting mold for railway wheel production according to claim 4, characterized in that: The body of the sealing column (64) is provided with two upper and lower connecting grooves (65) which are connected to each other. The interiors of the connecting grooves (65) on both sides are respectively connected to the interiors of the connecting pipe (63) and the drainage pipe (62). The interiors of the connecting grooves (65) on both sides are also connected to the interior of the water jacket (61).

6. The casting mold for railway wheel production according to claim 4, characterized in that: The outer surface of the sealing column (64) is fixedly connected to a support plate (66), the outer surface of the support plate (66) is movably connected to the inside of the water jacket (61), the outer surface of the support plate (66) is fixedly connected to a spring rod (67), one end of the spring rod (67) is fixedly connected to the inside of the water jacket (61).

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