A casting device for forging liner

Abstract

The present invention relates to the field of casting technology, and specifically to a casting device for forging liners, comprising a lower mold box, an upper mold box and a limit rod, the lower mold box and the upper mold box are filled with molding sand, and the molding sand has a plurality of cavities in a linear array, a material box is arranged above the upper mold box, the material box is suspended and fixed on a support plate, the support plate is paved with an electric slide rail, the lower mold box is slidably mounted on the electric slide rail, the electric slide rail is electrically connected to a control system, and the threaded rod is rotated, and the side of the arc-shaped slider can drive the tightly pressed flow control push plate to slide and adjust the length of the flow control push plate extending out of the side of the guide rod, and the electric telescopic rod contracts to push the flow control baffle and the discharge slide plate fixedly connected to the flow control baffle to slide, and the moving distance of the flow control baffle controls the gap area between the four flow control baffles to achieve flow control, thereby ultimately ensuring a stable pouring speed.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and in particular to a casting device for forging a liner. Background Art

[0002] Casting technology is a processing method in which liquid metal is poured into a mold with a specific shape, and parts or blanks with desired shapes and properties are obtained after the parts are cooled and solidified. As a material with a simple structure and a large amount of use, the liner can be produced by casting into a blank and then further processed into a finished product. Prior art, such as a casting device for forged liner that is easy to demold, disclosed in publication number CN113275508B. In the process of casting the liner, due to the particularity of the casting process, the outer surface of the casting is first cooled in contact with the external environment during the solidification process, which leads to uneven cooling and thermal stress. When the thermal stress exceeds the strength limit of the material, cracks will occur. The pouring method of directly pouring molten metal through the pouring inlet will make the pouring speed uneven, and it is easy to cause the bottom end part to cool too fast, resulting in pores and cold shut in the casting. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the present invention provides a casting device for forging liner plates, which can effectively solve the problems of unstable casting method and uneven cooling during the cooling process in the prior art.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] The present invention provides a casting device for forging liner plates, comprising a lower die box, an upper die box and a limit rod, wherein the lower die box and the upper die box are filled with molding sand, wherein the molding sand has a plurality of cavities in a linear array, wherein a material box is arranged above the upper die box, wherein the material box is suspended and fixed on a support plate, wherein the support plate is provided with an electric slide rail, wherein the lower die box is slidably mounted on the electric slide rail, wherein the electric slide rail is electrically connected to a control system, and wherein the device further comprises:

[0006] A feeding mechanism, the feeding mechanism includes a docking assembly, the docking assembly includes two discharge ports arranged side by side on the lower surface of the material box, the discharge port is frame-shaped, and a feed port used in conjunction with the discharge port is fixed at a position of the molding sand facing the mold cavity. When the device performs a pouring process for liner plates of different sizes, the pouring speed of the molten metal can be adjusted according to the size of the liner plates;

[0007] A temperature control mechanism, which can help the metal liquid in the upper mold box and the lower mold box to be at an optimal temperature;

[0008] The heating mechanism comprises a heating coil, wherein the heating coil has multiple groups and is respectively wound around the outside of each cavity, and the number of turns of the multiple groups of heating coils increases successively from top to bottom.

[0009] Preferably, the feeding mechanism also includes two guide rods slidably mounted on the upper surface of the material box, the lower ends of the guide rods extend out of the discharge port, the tops of the two guide rods are jointly fixed on a connecting plate, the upper surface of the material box is fixed with an electric telescopic rod, the electric telescopic rod is electrically connected to a control system, the telescopic end of the electric telescopic rod is fixed to the lower surface of the connecting plate, the guide rod is a cylindrical structure, a force transmission rod is rotatably mounted inside the guide rod, a threaded rod is fixedly mounted on the top of the force transmission rod, the threaded rod extends through the connecting plate and is threadedly connected to the connecting plate, four arc sliding blocks are fixed in a circular array on the outer wall of the lower half of the force transmission rod, the side wall of the guide rod is sealed and slidably inserted with a flow control push plate at the position opposite to the arc sliding block, one end of the flow control push plate is in tight contact with the side surface of the arc sliding block, the side wall of the flow control push plate is fixed with a reset plate, and the reset telescopic rod is fixed on the reset plate, the outer side of the reset telescopic rod is sleeved with a reset spring, and the ends of the reset telescopic rod and the reset spring are fixed to the inner wall of the guide rod.

[0010] Preferably, a discharging slide plate is slidably installed on the four sides of the discharging port, the discharging slide plate is L-shaped, a flow control baffle is fixed to the end of the discharging slide plate, the flow control baffle is provided with symmetrical beveled edges, the sides of two adjacent flow control baffles are in contact and sealed, the centers of the four flow control baffles are in a quarter arc shape and together form a circular and sealing fit with the guide rod, a discharging guide rod is fixed to the side of the discharging port, the discharging guide rod is slidably inserted in the side of the discharging slide plate, and the outer sleeve of the discharging guide rod is provided with a discharging spring fixed to the discharging slide plate and the discharging port.

[0011] Preferably, a shrinkage agent box is fixed to one side of the material box, a solenoid valve is installed on the lower surface of the shrinkage agent box, the solenoid valve is electrically connected to the control system, a riser connected to the cavity is installed in the middle position of the two feed ports, and the solenoid valve is used in conjunction with the riser.

[0012] Preferably, the device includes a positioning mechanism, which includes two positioning protrusions fixed side by side under the material box, and a positioning recessed block is provided on the side wall of the upper mold box. The positioning protrusion and the positioning recessed block are used in combination, and the positioning mechanism can be used to control the movement of the lower mold box and the pouring operation of the feeding mechanism. Two ear plates are symmetrically fixed on the side of the positioning protrusion, and the lower surfaces of the two ear plates are respectively fixed with a first pressure sensor and a second pressure sensor, the first pressure sensor and the second pressure sensor are electrically connected to the control system, and load-bearing blocks corresponding to the cavities are symmetrically fixed on both sides of the upper mold box, and there is no load-bearing block at the first cavity position on the same side as the second pressure sensor, the lower surface of the positioning protrusion is provided with an arc surface a, and the upper surface of the positioning recessed block is sequentially provided with an arc surface b and an arc surface c, a positioning telescopic rod is fixed to the lower surface of the positioning recessed block, and a load-bearing block is fixed to the lower surface of the positioning telescopic rod, and the load-bearing block is fixed to the side wall of the upper mold box, and a positioning spring is provided on the outer side of the positioning telescopic rod, and the two ends of the positioning spring are respectively fixed to the positioning recessed block and the load-bearing block.

[0013] Preferably, the temperature control mechanism includes a lower mold air duct and an upper mold air duct, the upper mold air duct and the lower mold air duct are respectively fixed in the upper mold box and the lower mold box and are evenly arranged around each cavity, a fan is fixed to the side wall of the lower mold box, the fan is electrically connected to the control system, the air inlet end of the fan is fixedly installed with the lower mold air duct, and the air outlet end of the fan is installed with a pipe orifice connecting seat, and the pipe orifice of the upper mold air duct is sealably inserted in the pipe orifice connecting seat.

[0014] Preferably, multiple groups of heating coils at the same height are connected in series on the same group of contact sheets, and the multiple groups of contact sheets are fixed in a linear array on the side walls of the upper mold box and the lower mold box. Mirror-set guide rails are also fixed on the side walls of the upper mold box and the lower mold box. A guide block is slidably installed in the guide rail, and an inverter is fixed in the middle of the guide block. The inverter is electrically connected to the factory power supply, and the inverter can be moved in the up and down directions by a driving member. Contact electrodes are fixed on both output ends of the inverter, and the contact electrodes can contact and fit at least three groups of contact sheets at the same time.

[0015] Preferably, a motor is electrically connected to and fixed on the side of the inverter, a gear is fixed on the output shaft of the motor, and a rack meshing with the gear is fixed on the inner wall of the guide rail on the same side as the gear.

[0016] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0017] 1. Rotate the threaded rod to drive the force transmission rod to rotate, and then the force transmission rod drives the arc-shaped slider fixed on its side wall to rotate. The side of the arc-shaped slider can drive the flow control push plate to slide and adjust the length of the flow control push plate extending from the side of the guide rod. The electric telescopic rod contracts and drives the guide rod to move downward through the inlet to the arc surface at the bottom of the flow control push plate to contact the flow control baffle, and push the flow control baffle and the discharge slide plate to slide. The moving distance of the flow control baffle is controlled by the length of the flow control push plate extending from the side of the guide rod. The gap area between the four flow control baffles is controlled to control the flow rate, and finally ensure the stability of the pouring speed;

[0018] 2. The electric slide rail drives the lower die box to move until the arc surface of the positioning convex rod contacts and presses against the first arc surface of the positioning concave block. The positioning concave block slides downward along the positioning telescopic rod. This process compresses the positioning spring. When the bottom end of the positioning convex rod moves to the hollow of the positioning concave block, the positioning concave block moves upward under the elastic potential energy of the positioning spring until it presses against the top surface of the positioning concave block and triggers the first pressure sensor to transmit a signal to the control system. The positioning mechanism can make the guide rod face the feed port, and the solenoid valve face the riser, thereby improving the operation accuracy. When used in conjunction with the control system, the operation process is smooth and the coordination logic of each mechanism is clear.

[0019] 3. The control system controls the inverter to be energized, and the multiple groups of contact plates located below that are in contact with the inverter contact electrodes are energized. The heating coil is energized to keep the molten metal below in a heated state. After the pouring operation is completed, the control system controls the motor to rotate uniformly and slowly, driving the gear to rotate slowly. Due to the engagement of the gear and the rack, the gear moves upward and drives the inverter upward at the same time. The contact plates that are separated from the contact electrodes are powered off and stop operating. The slowly rising inverter energizes the heating coil connected to the contact plates that are newly in contact with the contact electrodes. The inverter is at different heights at different times to ensure that the molten metal in the cavity is cooled at a uniform and stable speed from bottom to top. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a front view of the present invention;

[0023] Figure 3 is a cross-sectional view of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the temperature control mechanism in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the feeding mechanism in the present invention;

[0026] Figure 6 for Figure 5 A is an enlarged schematic diagram;

[0027] Figure 7 It is a structural schematic diagram of the discharge port in the present invention;

[0028] Figure 8 It is a structural schematic diagram of the flow control baffle in the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the material box in the present invention;

[0030] Fig.10 for Fig. 9 The enlarged schematic diagram of point B in FIG.

[0031] Fig.11 for Fig. 9 The enlarged schematic diagram of point C in FIG.

[0032] Fig.12 It is a structural schematic diagram of the positioning concave block in the present invention;

[0033] Fig.13 It is a schematic diagram of the structure of the contact electric sheet in the present invention;

[0034] Fig.14 Schematic diagram of the gear position in the present invention.

[0035] Figure numerals: 1, material box; 11, lower mold box; 111, limit rod; 12, upper mold box; 13, molding sand; 14, electric slide rail; 2, feeding mechanism; 21, electric telescopic rod; 22, guide rod; 221, connecting plate; 23, docking assembly; 231, discharge port; 2311, inlet; 232, discharge slide plate; 233, discharge guide rod; 234, discharge spring; 235, flow control baffle; 24, threaded rod; 241, force transmission rod; 25, arc slider; 26, flow control push plate; 261, reset plate; 262, reset telescopic rod; 263, reset spring; 27, fill Shrink box; 271, solenoid valve; 272, riser; 3, positioning mechanism; 31, positioning convex rod; 32, load-bearing block; 33, positioning concave block; 34, positioning telescopic rod; 35, positioning spring; 36, ear plate; 37, first pressure sensor; 38, second pressure sensor; 4, temperature control mechanism; 41, fan; 42, lower mold air duct; 43, upper mold air duct; 44, pipe mouth connecting seat; 5, heating mechanism; 51, inverter; 511, guide rail; 52, heating coil; 53, contact electrode; 54, rack; 55, motor; 56, gear; 57, contact electrode; 58, guide block. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0037] The present invention will be further described below in conjunction with the embodiments.

[0038] Example: Refer to Figures 1 to 14A casting device for forging liner, comprising a lower mold box 11, an upper mold box 12 and a limit rod 111, the lower mold box 11 and the upper mold box 12 are filled with molding sand 13, and the molding sand 13 has a plurality of cavities in a linear array, a material box 1 is arranged above the upper mold box 12, the material box 1 is suspended and fixed on a support plate, the support plate is paved with an electric slide rail 14, the lower mold box 11 is slidably installed on the electric slide rail 14, and the electric slide rail 14 is electrically connected to a control system, and also comprises: a feeding mechanism 2, a positioning mechanism 3, a temperature control mechanism 4 and a heating mechanism 5. Compared with the prior art, the feeding mechanism 2 can directly and stably guide the molten metal to the bottom of the mold cavity through the guide rod 22, so as to avoid pouring the metal directly through the pouring inlet The pouring speed is uneven due to the liquid, and the flow control baffle 235 arranged at the discharge port 231 can realize the flow control of the molten metal, adapt to the optimal pouring speed required in the pouring process of liners of different sizes, and avoid the air holes and cold shut caused by too fast or too slow speed. The positioning mechanism 3 can assist the discharge port 231 in the feeding mechanism 2 to be aligned with the feed port 2311, so that the guide rod 22 can accurately extend into the cavity through the feed port 2311. The heating mechanism 5 can heat the bottom molten metal during the pouring process. The heating can further ensure that the bottom will not cool down prematurely during the pouring process, avoid the air holes caused by the gas not having time to float out of the molten metal, make the texture of the finished cast product uniform, and eliminate thermal stress.

[0039] Reference Figure 1 as well as Figures 5 to 8The feeding mechanism 2 includes a docking assembly 23, which includes two discharge ports 231 arranged side by side on the lower surface of the material box 1, and the discharge port 231 is frame-shaped. The position of the molding sand 13 facing the mold cavity is fixed with an inlet 2311 used in conjunction with the discharge port 231. The feeding mechanism 2 also includes two guide rods 22 slidably mounted on the upper surface of the material box 1, and the lower ends of the guide rods 22 extend out of the discharge port 231. The tops of the two guide rods 22 are jointly fixed with a connecting plate 221. An electric telescopic rod 21 is fixed on the upper surface of the material box 1, and the electric telescopic rod 21 is electrically connected to the control system. The electric telescopic rod 21 is electrically connected to the control system. The telescopic end of the retracted rod 21 is fixed to the lower surface of the connecting plate 221. The guide rod 22 is a cylindrical structure. A force transmission rod 241 is rotatably installed inside the guide rod 22. A threaded rod 24 is fixedly installed on the top of the force transmission rod 241. The threaded rod 24 extends through the connecting plate 221 and is threadedly connected to the connecting plate 221. Four arc-shaped sliders 25 are fixed in a circular array on the outer wall of the lower half of the force transmission rod 241. A flow control push plate 26 is inserted and sealed and slidably inserted at the position of the side wall of the guide rod 22 facing the arc-shaped slider 25. One end of the flow control push plate 26 is in close contact with the side of the arc-shaped slider 25. The side wall of the flow control push plate 26 is fixed with A reset plate 261 is fixed with a reset telescopic rod 262, and a reset spring 263 is sleeved on the outer side of the reset telescopic rod 262. The ends of the reset telescopic rod 262 and the reset spring 263 are fixed to the inner wall of the guide rod 22. The four sides of the discharge port 231 are slidably mounted with a discharge slide 232. The discharge slide 232 is L-shaped, and a flow control baffle 235 is fixed to the end of the discharge slide 232. The flow control baffle 235 is provided with symmetrical beveled edges. The sides of two adjacent flow control baffles 235 are in contact and sealed. The centers of the four flow control baffles 235 are in a quarter arc shape and are in a total of A circular and sealing guide rod 22 is combined with the material discharge port 231, and a discharge guide rod 233 is fixed on the side of the material discharge port 231. The discharge guide rod 233 is slidably inserted on the side of the material discharge slide plate 232. The outer sleeve of the material discharge guide rod 233 is provided with a discharge spring 234 fixed to the material discharge slide plate 232 and the material discharge port 231. A shrinkage agent box 27 is fixed to one side of the material box 1. A solenoid valve 271 is installed on the lower surface of the shrinkage agent box 27. The solenoid valve 271 is electrically connected to the control system. A riser 272 connected to the cavity is installed in the middle position of the two material inlets 2311, and the solenoid valve 271 is used in conjunction with the riser 272.

[0040] The threaded rod 24 is rotated to drive the force transmission rod 241 to rotate, and then the force transmission rod 241 drives the arc-shaped slider 25 fixed on its side wall to rotate. The side of the arc-shaped slider 25 can drive the flow control push plate 26 to slide, and then adjust the length of the flow control push plate 26 extending out of the side of the guide rod 22. The electric telescopic rod 21 is contracted to drive the guide rod 22 to pass through the feed inlet 2311 and move downward until the arc surface at the bottom end of the flow control push plate 26 contacts the flow control baffle 235, and pushes the flow control baffle 235 and the discharge slide plate 232 fixedly connected to the flow control baffle 235 to slide, compressing the reset spring 26. 3. The length of the flow control push plate 26 extending out of the side of the guide rod 22, which is synchronously adjusted according to the rotation angle of the threaded rod 24, can control the moving distance of the flow control baffle 235, and then control the gap area between the four flow control baffles 235 to control the flow rate. After one cycle of operation is completed, the electric telescopic rod 21 extends at a uniform speed, which can drive the guide rod 22 to move upward as the metal liquid level in the cavity rises. After the flow control push plate 26 no longer contacts the flow control baffle 235, the flow control baffle 235 slides under the elastic potential energy of the return spring 263 and seals the adjacent flow control baffles 235 and the guide rod 22.

[0041] Reference Figure 1 as well as Figures 9 to 12 The positioning mechanism 3 includes two positioning convex rods 31 fixed side by side under the material box 1, and the side wall of the upper mold box 12 is provided with a positioning concave block 33. The positioning convex rods 31 and the positioning concave block 33 are used in conjunction with each other, and the positioning mechanism 3 can control the movement of the lower mold box 11 and the pouring operation of the feeding mechanism 2. Two ear plates 36 are symmetrically fixed on the side of the positioning convex rods 31. The lower surfaces of the two ear plates 36 are respectively fixed with a first pressure sensor 37 and a second pressure sensor 38. The first pressure sensor 37 and the second pressure sensor 38 are electrically connected to the control system. The upper mold box 12 is symmetrically fixed on both sides. There is a load-bearing block 32 corresponding to the cavity. There is no load-bearing block 32 at the first cavity position on the same side as the second pressure sensor 38. The lower surface of the positioning convex rod 31 is provided with an arc surface a, and the upper surface of the positioning recessed block 33 is provided with arc surfaces b and arc surfaces c in sequence. A positioning telescopic rod 34 is fixed to the lower surface of the positioning telescopic rod 34, and a load-bearing block 32 is fixed to the lower surface of the positioning telescopic rod 34. The load-bearing block 32 is fixed to the side wall of the upper mold box 12. A positioning spring 35 is provided on the outer side of the positioning telescopic rod 34, and the two ends of the positioning spring 35 are respectively fixed to the positioning recessed block 33 and the load-bearing block 32.

[0042] The electric slide rail 14 drives the lower mold box 11 to move until the arc surface of the positioning convex rod 31 contacts and presses against the first arc surface of the positioning concave block 33, and the positioning concave block 33 slides downward along the positioning telescopic rod 34. This process compresses the positioning spring 35. When the bottom end of the positioning convex rod 31 moves to the hollow part of the positioning concave block 33, the positioning concave block 33 moves upward under the elastic potential energy of the positioning spring 35 until the top surface of the positioning concave block 33 presses against and triggers the first pressure sensor 37 to transmit a signal to the control system. The control system feeds back a signal to the electric telescopic rod 21. The telescopic rod 21 is retracted to start the pouring operation. After one cycle, the control system controls the lower electric slide rail 14 to drive the lower mold box 11 to continue to move. The arc surface of the positioning convex rod 31 contacts and tightly contacts the second arc surface of the positioning concave block 33. The positioning concave block 33 slides downward along the positioning telescopic rod 34. This process compresses the positioning spring 35. When the bottom end of the positioning convex rod 31 is separated from the positioning concave block 33, the positioning concave block 33 moves upward under the elastic potential energy of the positioning spring 35, and the arc surface of the positioning convex rod 31 continues to move to contact the first arc surface of the second positioning concave block 33. The positioning concave block 33 slides downward along the positioning telescopic rod 34, and this process compresses the positioning spring 35. When the bottom end of the positioning convex rod 31 moves to the hollow part of the positioning concave block 33, the positioning concave block 33 moves upward under the elastic potential energy of the positioning spring 35 until the top surface of the positioning concave block 33 is pressed tightly and the first pressure sensor 37 and the second pressure sensor 38 are triggered to transmit signals to the control system, and the control system controls the electric telescopic rod 2 1 cycle operation, at this time, the solenoid valve 271 is facing the riser 272 of the first cavity where the pouring has been completed, the solenoid valve 271 is opened under the control of the control system, and the shrinkage feeding agent is uniformly injected into the riser 272 through the opening of the solenoid valve 271. After a certain period of time, the control system controls the solenoid valve 271 to close, and the positioning mechanism 3 can make the guide rod 22 face the feed port 2311, and the solenoid valve 271 faces the riser 272, so as to improve the operation accuracy. The use of the control system makes the operation process smooth and the coordination logic of each mechanism clear.

[0043] Reference Figures 1 to 4 The temperature control mechanism 4 includes a lower mold air duct 42 and an upper mold air duct 43. The upper mold air duct 43 and the lower mold air duct 42 are respectively fixed in the upper mold box 12 and the lower mold box 11 and are evenly arranged around each cavity. A fan 41 is fixed to the side wall of the lower mold box 11. The fan 41 is electrically connected to the control system. The air inlet end of the fan 41 is fixedly installed with the lower mold air duct 42. A pipe orifice connecting seat 44 is installed at the air outlet end of the fan 41. The pipe orifice of the upper mold air duct 43 is sealed and inserted in the pipe orifice connecting seat 44. The temperature control mechanism 4 can assist the metal liquid in the upper mold box 12 and the lower mold box 11 to be at a better temperature.

[0044] The fan 41 is started under the control of the control system, and the lower mold air duct 42 located in the lower mold box 11 sucks air and cools the molten metal in the lower mold box 11 to accelerate the cooling of the molten metal below. The heated air is transported to the upper mold air duct 43 through the fan 41 to keep the molten metal above warm.

[0045] Reference Figures 1 to 4 as well as Fig.13 Fig.14 The heating mechanism 5 includes a heating coil 52. The heating coil 52 has multiple groups and is respectively wound on the outside of each cavity. The number of turns of the multiple groups of heating coils 52 increases from top to bottom. The multiple groups of heating coils 52 at the same height are connected in series on the same group of contact sheets 53. The contact sheets 53 are fixed in a linear array on the side walls of the upper mold box 12 and the lower mold box 11. The side walls of the upper mold box 12 and the lower mold box 11 are also fixed with guide rails 511 arranged in a mirror image. A guide block 58 is slidably installed in the guide rail 511. The middle of the guide block 58 is fixed An inverter 51 is provided, which is electrically connected to the factory power and can convert the factory power into high-frequency alternating current suitable for the coil. The inverter 51 can be moved in the up and down directions by a driving member. Contact electrodes 57 are fixed to both output ends of the inverter 51, and the contact electrodes 57 can contact and fit at least three groups of contact sheets 53 at the same time. The side of the inverter 51 is electrically connected and fixed with a motor 55, and a gear 56 is fixed on the output shaft of the motor 55. A rack 54 meshing with the gear 56 is fixed to the inner wall of the guide rail 511 on the same side as the gear 56.

[0046] During the pouring operation, the inverter 51 is located at the bottom of the slide rail, and the control system controls the inverter 51 to be energized, and the multiple groups of contact plates 53 located below that are in contact with the contact electrode 57 of the inverter 51 are energized, and the heating coil 52 is energized to operate so that the molten metal located below is in a heated state. After the pouring operation is completed, the control system controls the motor 55 to rotate at a uniform and slow speed, driving the gear 56 to rotate slowly. Due to the meshing of the gear 56 and the rack 54, the gear 56 moves upward and drives the inverter 51 to move upward at the same time, and the contact plate 53 that is separated from the contact electrode 57 is powered off and stops operating. The slowly rising inverter 51 energizes the heating coil 52 connected to the contact plate 53 that is newly in contact with the contact electrode 57, thereby heating the molten metal in the middle and upper part, ensuring that the molten metal above is in a liquid state before the bottom molten metal solidifies, and heats the molten metal above after the inverter 51 moves to the top. After a certain period of time, the molten metal below solidifies, and the control system controls the contact electrode 57 to be powered off and the motor 55 to reverse to drive the inverter 51 to reset.

[0047] The heating mechanism 5 cooperates with the temperature control mechanism 4, and the inverter 51 is at different heights at different times, which can ensure that the molten metal in the cavity is in a stable cooling process from bottom to top, thereby avoiding the problem in the prior art that the casting fails to be cooled first from the bottom during the cooling process, which easily generates thermal stress, and causes shrinkage, cracks or pores.

[0048] The working principle of the present invention is as follows: when performing the pouring operation, the molten metal to be poured is poured into the material box 1 in advance, and the threaded rod 24 is rotated according to the size of the liner to be poured, driving the force transmission rod 241 to rotate, and then the force transmission rod 241 drives the arc-shaped slider 25 fixed on its side wall to rotate, and the side of the arc-shaped slider 25 can drive the flow control push plate 26 pressed against it to slide, and then adjust the length of the flow control push plate 26 extending from the side of the guide rod 22. Under the control of the control system, the electric slide rail 14 drives the lower mold box 11 to move until the positioning protruding rod 31 The arc surface a of the positioning concave block 33 is in contact with the arc surface b of the positioning concave block 33, and the positioning concave block 33 slides downward along the positioning telescopic rod 34. This process compresses the positioning spring 35. When the bottom end of the positioning convex rod 31 moves to the hollow of the positioning concave block 33, the positioning concave block 33 moves upward under the elastic potential energy of the positioning spring 35 until the top surface of the positioning concave block 33 is pressed tightly and triggers the first pressure sensor 37 to transmit a signal to the control system. The control system feeds back a signal to the electric telescopic rod 21, and the electric telescopic rod 21 contracts, driving the guide rod 22 to pass through the feed inlet 23 11 moves downward until the arc surface at the bottom end of the flow control push plate 26 contacts the flow control baffle 235, and pushes the flow control baffle 235 and the discharge slide plate 232 fixedly connected to the flow control baffle 235 to slide, compressing the reset spring 263. The flow control push plate 26, which is synchronously adjusted according to the rotation angle of the threaded rod 24, extends the length of the side of the guide rod 22 to control the moving distance of the flow control baffle 235, and then controls the size of the gap area between the four flow control baffles 235. The guide rod 22 passes through the feed inlet 2311 and continues to move downward to the lower part of the cavity. At the same time, the metal The metal liquid passes through the gaps between the four flow control baffles 235 and is smoothly injected into the cavity under the guidance of the guide rod 22. The electric telescopic rod 21 extends at a uniform speed under the control of the control system, driving the guide rod 22 to move upward as the metal liquid level in the cavity rises. After the flow control push plate 26 no longer contacts the flow control baffle 235, the flow control baffle 235 slides under the elastic potential energy of the return spring 263 and seals the adjacent flow control baffle 235 and the guide rod 22. The electric telescopic rod 21 continues to move until the guide rod 22 moves above the feed inlet 2311.

[0049] The control system controls the lower electric slide rail 14 to drive the lower mold box 11 to continue to move, the arc surface a of the positioning convex rod 31 contacts and presses against the arc surface c of the positioning concave block 33, and the positioning concave block 33 slides downward along the positioning telescopic rod 34, and this process compresses the positioning spring 35. When the bottom end of the positioning convex rod 31 is separated from the positioning concave block 33, the positioning concave block 33 moves upward and resets under the elastic potential energy of the positioning spring 35, and the arc surface of the positioning convex rod 31 continues to move and contacts and presses against the first arc surface of the second positioning concave block 33. At the same time, the arc surface a of the positioning convex rod 31 on the other side contacts and presses against the arc surface b of the first positioning concave block 33, and the positioning concave block 33 slides downward along the positioning telescopic rod 34, and this process compresses the positioning Spring 35, when the bottom end of the positioning protrusion 31 moves to the hollow part of the positioning recessed block 33, the positioning recessed block 33 moves upward under the elastic potential energy of the positioning spring 35, until the top surface of the positioning recessed block 33 is pressed tightly and triggers the first pressure sensor 37 and the second pressure sensor 38 to transmit signals to the control system, and the control system controls the electric telescopic rod 21 to operate cyclically. At this time, the solenoid valve 271 is facing the riser 272 of the first cavity where the pouring has been completed. The solenoid valve 271 is opened under the control of the control system, and the shrinkage feeding agent is uniformly injected into the riser 272 through the opening of the solenoid valve 271. After a certain period of time, the control system controls the solenoid valve 271 to close, and then the pouring operation cycle continues.

[0050] During the pouring operation, the inverter 51 is located at the bottom of the slide rail, and the control system controls the inverter 51 to be energized, and the three groups of contact electrodes 53 at the bottom that are in contact with the contact electrode 57 of the inverter 51 are energized, and the heating coil 52 is energized to heat the molten metal at the bottom. After the pouring operation is completed, the control system controls the motor 55 to rotate at a uniform and slow speed, driving the gear 56 to rotate slowly. Due to the meshing of the gear 56 and the rack 54, the gear 56 moves upward and drives the inverter 51 to move upward at the same time, and the contact electrode 53 that is separated from the contact electrode 57 is powered off and stops operating. The fan 41 is started under the control of the control system, and the lower mold air duct 42 located in the lower mold box 11 inhales air and cools the molten metal in the lower mold box 11. The temperature accelerates the cooling of the molten metal below, and the heated air is transported to the upper mold air duct 43 through the fan 41 to keep the molten metal above warm. At the same time, the slowly rising inverter 51 energizes the heating coil 52 connected to the contact electrode 53 that has newly contacted the contact electrode 57, thereby heating the molten metal in the middle and upper parts to ensure that the molten metal above is in liquid state before the molten metal at the bottom solidifies. After the inverter 51 moves to the top, it heats the top, and the molten metal below gradually solidifies. The control system controls the contact electrode 57 to cut off the power and the motor 55 to reverse and drive the inverter 51 to reset. The molten metal at the top gradually solidifies, and as the number of turns of the heating coil 52 decreases during the rising process of the inverter 51, the heating power of the heating coil 52 gradually decreases, saving energy.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casting device for forging a liner, comprising a lower mold box (11), an upper mold box (12) and a stopper rod (111), wherein the lower mold box (11) and the upper mold box (12) are filled with molding sand (13), characterized in that: The molding sand (13) has a plurality of molding cavities in a linear array, a material box (1) is arranged above the upper mold box (12), a support plate is arranged below the material box (1), the material box (1) is suspended and fixed on the support plate, an electric slide rail (14) is laid on the support plate, the lower mold box (11) is slidably mounted on the electric slide rail (14), and the electric slide rail (14) is electrically connected to a control system. The device also includes: A feeding mechanism (2), the feeding mechanism (2) comprising a docking assembly (23), the docking assembly (23) comprising two discharge ports (231) arranged side by side on the lower surface of the material box (1), the discharge ports (231) being frame-shaped, an inlet port (2311) used in conjunction with the discharge ports (231) being fixed at a position of the molding sand (13) facing the molding cavity, and when the device performs a pouring process on liner plates of different sizes, the feeding mechanism (2) adjusts the pouring speed of the molten metal according to the size of the liner plates; The feeding mechanism (2) further comprises two guide rods (22) slidably mounted on the upper surface of the material box (1), the lower ends of the guide rods (22) extending out of a discharge port (231), the tops of the two guide rods (22) being fixed with a connecting plate (221) in common, an electric telescopic rod (21) being fixed on the upper surface of the material box (1), the electric telescopic rod (21) being electrically connected to a control system, the telescopic end of the electric telescopic rod (21) being fixed on the lower surface of the connecting plate (221), the guide rod (22) being a cylindrical structure, a force transmission rod (241) being rotatably mounted inside the guide rod (22), a threaded rod (24) being fixedly mounted on the top of the force transmission rod (241), the threaded rod (24) The connecting plate (221) extends through the connecting plate and is threadedly connected thereto. Four arc-shaped sliders (25) are fixed in a circular array on the outer wall of the lower half of the force transmission rod (241). A flow control push plate (26) is inserted and sealed and slidably provided at the position of the side wall of the material guide rod (22) facing the arc-shaped slider (25). One end of the flow control push plate (26) is in tight contact with the side of the arc-shaped slider (25). A reset plate (261) is fixed to the side wall of the flow control push plate (26). A reset telescopic rod (262) is fixed on the reset plate (261). A reset spring (263) is sleeved on the outer side of the reset telescopic rod (262). The ends of the reset telescopic rod (262) and the reset spring (263) are fixed to the inner wall of the material guide rod (22). L-shaped discharge slide plates (232) are slidably mounted on the four sides of the discharge port (231), and a flow control baffle (235) is fixed to the end of the discharge slide plate (232), and the flow control baffle (235) has two symmetrical hypotenuses and an arc edge connected to the two hypotenuses, and the hypotenuses of two adjacent flow control baffles (235) are in contact and sealed, and the arc edges of the four flow control baffles (235) are combined into a circle and are sealed to fit the guide rod (22), and a discharge guide rod (233) is fixed on one side of the discharge port (231) corresponding to each discharge slide plate (232), and the discharge guide rod (233) is slidably inserted on the side of the discharge slide plate (232), and the discharge guide rod (233) is provided with a discharge spring (234) fixed to the discharge slide plate (232) and the discharge port (231); A temperature control mechanism (4), wherein the temperature control mechanism (4) assists the metal liquid in the upper mold box (12) and the lower mold box (11) to be at an optimal temperature; A heating mechanism (5), wherein the heating mechanism (5) comprises a heating coil (52), wherein the heating coil (52) comprises a plurality of groups and is respectively wound around the outside of each cavity, and the number of turns of the plurality of groups of heating coils (52) increases sequentially from top to bottom.

2. A casting device for forging liner according to claim 1, characterized in that: A shrinkage-feeding agent box (27) is fixed to one side of the material box (1), and a solenoid valve (271) is installed on the lower surface of the shrinkage-feeding agent box (27), and the solenoid valve (271) is electrically connected to the control system. A riser (272) connected to the mold cavity is installed in the middle position of the two feed ports (2311), and the solenoid valve (271) and the riser (272) are used in conjunction with each other.

3. A casting device for forging liner according to claim 1, characterized in that: The invention also comprises a positioning mechanism (3), wherein the positioning mechanism (3) comprises two positioning protrusions (31) fixed side by side below the material box (1), and a positioning recess (33) is provided on the side wall of the upper mold box (12). The positioning protrusions (31) and the positioning recess (33) are used in combination, and the movement of the lower mold box (11) and the pouring operation of the feeding mechanism (2) are controlled by the positioning mechanism (3). Two ear plates (36) are symmetrically fixed on the opposite sides of the two positioning protrusions (31), and a first pressure sensor (37) and a second pressure sensor (38) are respectively fixed on the lower surfaces of the two ear plates (36). The first pressure sensor (37) and the second pressure sensor (38) are electrically connected to the control system. The upper mold box (12) is connected, and load-bearing blocks (32) corresponding to the mold cavity are symmetrically fixed on both sides, and there is no load-bearing block (32) at the mold cavity position on the same side as the second pressure sensor (38). The lower surface of the positioning protrusion (31) is provided with an arc surface a, and the upper surface of the positioning recessed block (33) is provided with an arc surface b and an arc surface c in sequence. A positioning telescopic rod (34) is fixed to the lower surface of the positioning recessed block (33), and the lower end of the positioning telescopic rod (34) is fixed to the load-bearing block (32) at the corresponding position. A positioning spring (35) is sleeved on the outer side of the positioning telescopic rod (34), and the two ends of the positioning spring (35) are respectively fixed to the positioning recessed block (33) and the load-bearing block (32).

4. A casting device for forging liner according to claim 1, characterized in that: The temperature control mechanism (4) comprises a lower mold air duct (42) and an upper mold air duct (43); the upper mold air duct (43) and the lower mold air duct (42) are respectively fixed in the upper mold box (12) and the lower mold box (11) and are evenly arranged around each cavity; a fan (41) is fixed on the side wall of the lower mold box (11); the fan (41) is electrically connected to a control system; an air inlet end of the fan (41) is fixedly mounted on the lower mold air duct (42); an outlet end of the fan (41) is mounted with a pipe orifice connection seat (44); and a pipe orifice of the upper mold air duct (43) is sealed and plugged into the pipe orifice connection seat (44).

5. A casting device for forging liner according to claim 1, characterized in that: Multiple groups of heating coils (52) of the same height are connected in series on the same group of contact sheets (53), and the multiple groups of contact sheets (53) are fixed in a linear array on the side walls of the upper mold box (12) and the lower mold box (11). Guide rails (511) arranged in a mirror image are also fixed on the side walls of the upper mold box (12) and the lower mold box (11). A guide block (58) is slidably installed in the guide rail (511), and an inverter (51) is fixed in the middle of the guide block (58). The inverter (51) is electrically connected to the factory power supply. The inverter (51) is driven vertically, and contact electrodes (57) are fixed on both output ends of the inverter (51). The contact electrodes (57) can contact and fit at least three groups of contact sheets (53) at the same time.

6. A casting device for forging liner according to claim 5, characterized in that: A motor (55) is fixed on the side of the inverter (51), a gear (56) is fixed on the output shaft of the motor (55), and a rack (54) meshing with the gear (56) is fixed on the inner wall of the guide rail (511) on the same side as the gear (56).

Images