Nodular cast iron casting forming device

Abstract

The invention belongs to the technical field of nodular cast iron casting, and particularly relates to a nodular cast iron casting forming device which comprises a base and a support, a sand mold is placed on the top of the base, a liquid hopper is fixed to the support, a sleeve capable of moving up and down is connected to a discharging pipe of the liquid hopper, a frame rod is fixed to the top of the base, and a cover cylinder is elastically connected to the vertical portion of the frame rod. A window is installed on the cover cylinder, a positioning ring is arranged in the cover cylinder, a piston located on the positioning ring is arranged in the cover cylinder, the piston is connected with a transmission assembly, and a flow control assembly is arranged on the discharging pipe. According to the sand mold, the sleeve is aligned with the feeding port, then the cover cylinder is aligned with the exhaust port, raw materials are injected into the sand mold through the liquid hopper, after the raw materials enter the sand mold, high-temperature gas enters the cover cylinder from the exhaust port, then the piston is pushed to move upwards under the action of air pressure, and then the piston drives the flow control assembly to work through the transmission assembly; and the flow of the discharging pipe is gradually reduced, so that feeding is conveniently and accurately controlled.

Description

Technical Field

[0001] The invention relates to the technical field of ductile iron casting, in particular to a ductile iron casting molding device. Background Art

[0002] Ductile iron casting equipment is a high-strength cast iron material that is heated and formed at high temperature. The comprehensive performance of the formed ductile iron casting parts is close to that of steel. Due to its excellent performance, it has been successfully used to cast some parts with complex stresses and high requirements for strength, toughness and wear resistance. Ductile iron has rapidly developed into a widely used cast iron material second only to gray cast iron.

[0003] When adding raw materials into the mold, the existing casting molding device adds the raw materials through the feed port on the mold, and then adds the raw materials in a pouring manner while observing. This is not only difficult to control, but also easy to add too much raw materials. Therefore, corresponding improvements are made to address this problem. Summary of the Invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a ductile iron casting molding device.

[0005] The present invention proposes a ductile iron casting molding device, which includes a base and a bracket, a sand mold is placed on the top of the base, a liquid hopper is fixed on the bracket, and a sleeve that can move up and down is connected to the discharge pipe of the liquid hopper, a frame rod is fixed on the top of the base, a cover cylinder is elastically connected to the vertical part of the frame rod, a window is installed on the cover cylinder, a positioning ring is provided in the cover cylinder, a piston located on the positioning ring is provided in the cover cylinder, the piston is connected to a transmission assembly, and a flow control assembly is provided on the discharge pipe, the sleeve is moved downward to align with the feed port, and then the cover cylinder is aligned with the exhaust port, and then the raw material is injected into the sand mold through the liquid hopper. After the raw material enters the sand mold, the high-temperature gas enters the cover cylinder from the exhaust port, and then pushes the piston upward under the action of air pressure, and then the piston drives the flow control assembly to work through the transmission assembly, so that the flow rate of the discharge pipe gradually decreases, thereby facilitating and accurately controlling the feeding, and also improving the feeding efficiency.

[0006] Preferably, the transmission assembly includes a shaft column rotatably connected to the vertical part, and main gears are fixedly sleeved at both ends of the shaft column. A first rack passing through the cover tube is fixed to the top of the piston, and the first rack is meshed with one of the main gears, and the other main gear is meshed with the second rack. When the piston moves upward, it synchronously drives the first rack to move, and the meshing of the first rack drives the main gear to rotate around the shaft column, and then the main gear will mesh and drive the second rack to move toward the discharge pipe, and the second rack will drive the flow control assembly to work.

[0007] Preferably, the flow control component includes a gate plate, an opening is provided on the discharge pipe, the gate plate is inserted in the opening, a discharge port is provided on the gate plate, a sleeve plate is fixed on the top of the second rack, an elastic connection is formed between the gate plate and the sleeve plate, and a handle is fixed on the top of the gate plate. When the second rack moves, it will drive the sleeve plate and the gate plate to move together, so that the flow in the discharge pipe can be gradually reduced through the discharge port. The staff can observe the total amount of raw materials in the sand mold through the window during feeding. If it is judged that the flow rate needs to be increased, it is only necessary to move the gate plate toward the sleeve plate through the handle, so as to facilitate the flow control operation.

[0008] Preferably, a slot for inserting the gate plate is provided in the sleeve plate, and a first spring is fixed to the inner wall of the slot, and the other end of the first spring is fixedly connected to the gate plate. In this way, the gate plate and the sleeve plate can be elastically connected through the first spring, and the gate plate can be pulled by the handle to control the flow.

[0009] Preferably, the flow control component includes a spherical valve core located in the discharge pipe, a shaft rod rotatably connected to the discharge pipe is fixed on the valve core, a handwheel and a sub-gear are respectively installed at both ends of the shaft rod, the second rack is elastically connected to the sub-rack, the sub-rack is meshed with the sub-gear, a guide sleeve is fixed on the side of the frame rod, the second rack passes through the guide sleeve, and when the second rack moves, it synchronously drives the sub-rack to move, and then the sub-rack will mesh and drive the sub-gear to rotate, and the sub-gear will synchronously drive the shaft rod and the valve core to rotate, so that the flow in the discharge pipe can be gradually reduced through the valve core. Similarly, the staff can also observe the total amount of raw materials in the sand mold through the window during feeding. If it is determined that the flow rate needs to be increased, it is only necessary to rotate the valve core in the opposite direction through the handwheel to facilitate the flow control operation.

[0010] Preferably, the inner end fixed sleeve of the second rack is provided with a sliding sleeve sleeved on the auxiliary rack, and the auxiliary rack and the second rack are connected by a third spring, so that when the valve core is rotated in the opposite direction, the auxiliary rack will compress the third spring and move towards the second rack.

[0011] Preferably, a sliding opening is provided on the vertical portion, a slider is slidably connected in the sliding opening, the slider is fixedly connected to the cover tube, a second spring is fixed on the top of the slider, and the top of the second spring is fixedly connected to the top wall of the sliding opening. Under the elastic force of the second spring, the cover tube will be pressed tightly against the sand mold, thereby improving the sealing between the cover tube and the sand mold.

[0012] Preferably, a pair of vertical plates symmetrically distributed front and back are fixed on the top of the base, a pressure plate is slidably connected to the vertical plates, a screw is rotatably connected to the vertical plates, and the screw is threadedly connected to the pressure plate. After the sand mold is placed on the base, the screw is rotated to drive the pressure plate to move downward along the vertical plate, so that the sand mold can be pressed and fixed by the pressure plate.

[0013] Preferably, a plurality of evenly distributed conveying rollers are rotatably connected in the base, and two pulleys are fixedly provided on the front end of the conveying roller. The same belt is provided between two adjacent pulleys, and the two adjacent belts are staggered. When the sand mold is pushed along the conveying roller, the conveying roller will rotate, so that the sand mold can be moved conveniently and labor-savingly.

[0014] Preferably, the sleeve is threadedly connected to the discharge pipe, and a rotating wheel is fixed on the sleeve. The sleeve is rotated by the rotating wheel to drive the sleeve to move downward along the axial direction of the discharge pipe until the sleeve is pressed against the sand mold, thereby strengthening the sealing between the sleeve and the sand mold.

[0015] Compared with the prior art, the present invention provides a ductile iron casting molding device with the following beneficial effects:

[0016] 1. A ductile iron casting molding device, which is equipped with a flow control component, moves the sleeve downward to align it with the feed port, and then aligns the cover tube with the exhaust port. Then, raw materials are injected into the sand mold through the liquid hopper. After the raw materials enter the sand mold, high-temperature gas enters the cover tube from the exhaust port, and then pushes the piston upward under the action of gas pressure. Then, the piston drives the flow control component to work through the transmission component, so that the flow rate of the discharge pipe gradually decreases, thereby facilitating and accurately controlling the feeding and improving the feeding efficiency.

[0017] 2. A ductile iron casting molding device is provided with a transmission assembly. When the piston moves upward, it synchronously drives the first rack to move. The first rack engages and drives the main gear to rotate around the shaft column. Then the main gear will engage and drive the second rack to move toward the discharge pipe. The second rack will drive the flow control assembly to work.

[0018] 3. A ductile iron casting molding device, which is equipped with a gate plate. When the second rack moves, it will drive the sleeve plate and the gate plate to move together, so that the flow in the discharge pipe can be gradually reduced through the discharge port. The staff can observe the total amount of raw materials in the sand mold through the window during feeding. If it is determined that the flow rate needs to be increased, it is only necessary to move the gate plate closer to the sleeve plate through the handle, thereby facilitating the flow control operation.

[0019] 4. A ductile iron casting molding device is provided with a valve core. When the second rack moves, it synchronously drives the secondary rack to move. Then the secondary rack engages and drives the secondary gear to rotate. The secondary gear then synchronously drives the shaft and the valve core to rotate. In this way, the flow rate in the discharge pipe can be gradually reduced through the valve core. Similarly, the staff can also observe the total amount of raw materials in the sand mold through the window during feeding. If it is determined that the flow rate needs to be increased, it is only necessary to rotate the valve core in the opposite direction using the handwheel, thereby conveniently performing the flow control operation.

[0020] 5. A ductile iron casting molding device is provided with a second spring. Under the elastic force of the second spring, the cover tube is pressed against the sand mold, thereby improving the sealing between the cover tube and the sand mold.

[0021] 6. A ductile iron casting molding device, which is provided with a sleeve, rotates the sleeve by a wheel, drives the sleeve to move downward along the axial direction of the discharge pipe until the sleeve is pressed against the sand mold, thereby strengthening the sealing between the sleeve and the sand mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a ductile iron casting molding device proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the base structure of a ductile iron casting molding device proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the installation structure between the flow control component and the transmission component of a ductile iron casting molding device proposed in Example 1 of the present invention;

[0025] Figure 4 This is a schematic diagram of the back structure of a transmission component of a ductile iron casting molding device proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of a shroud of a ductile iron casting molding device proposed by the present invention;

[0027] Figure 6 For the present invention Figure 1 A schematic diagram of the enlarged structure at point A;

[0028] Figure 7 For the present invention Figure 4 A schematic diagram of the enlarged structure at point B;

[0029] Figure 8 This is a schematic diagram of the installation structure between the flow control component and the transmission component of a ductile iron casting molding device proposed in Example 2 of the present invention;

[0030] Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at C;

[0031] Figure 10 For the present invention Figure 8 A schematic diagram of the enlarged structure at D;

[0032] Figure 11 For the present invention Figure 4 Enlarged structural diagram at E.

[0033] Figure: 1, base; 2, bracket; 3, liquid hopper; 4, discharge pipe; 5, sleeve; 6, runner; 7, frame rod; 8, vertical part; 9, cover tube; 10, positioning ring; 11, piston; 12, sand mold; 13, feed port; 14, exhaust port; 15, shaft column; 16, main gear; 17, first rack; 18, second rack; 19, opening; 20, gate; 21, discharge port; 22, sleeve Plate; 23. Slot; 24. First spring; 25. Handle; 26. Shaft; 27. Valve core; 28. Secondary rack; 29. ​​Secondary gear; 30. Guide sleeve; 31. Sliding sleeve; 32. Third spring; 33. Handwheel; 34. Sliding mouth; 35. Slider; 36. Second spring; 37. Vertical plate; 38. Pressure plate; 39. Screw; 40. Conveyor roller; 41. Pulley; 42. Belt; 43. Window. DETAILED DESCRIPTION

[0034] The technical solutions 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 only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] Reference Figure 1-11 A ductile iron casting molding device includes a base 1 and a bracket 2. A sand mold 12 is placed on the top of the base 1. A liquid bucket 3 is fixed on the bracket 2. A sleeve 5 that can move up and down is connected to the discharge pipe 4 of the liquid bucket 3. A frame rod 7 is fixed on the top of the base 1. A cover tube 9 is elastically connected to the vertical portion 8 of the frame rod 7. A window 43 is installed on the cover tube 9. A positioning ring 10 is provided in the cover tube 9. A piston 11 located on the positioning ring 10 is provided in the cover tube 9. The piston 11 is connected to a transmission assembly. The discharge pipe 4 A flow control component is provided on it. Move the sleeve 5 downward to align it with the feed port 13, and then align the cover tube 9 with the exhaust port 14. Then, the raw material is injected into the sand mold 12 through the liquid hopper 3. After the raw material enters the sand mold 12, the high-temperature gas enters the cover tube 9 from the exhaust port 14, and then pushes the piston 11 upward under the action of air pressure. Then, the piston 11 will drive the flow control component to work through the transmission component, so that the flow of the discharge pipe 4 gradually decreases, thereby facilitating and accurately controlling the feeding, and also improving the feeding efficiency.

[0037] Among them, the transmission assembly includes a shaft column 15 rotatably connected to the vertical part 8, and main gears 16 are fixedly sleeved at both ends of the shaft column 15. A first rack 17 passing through the cover tube 9 is fixed to the top of the piston 11. The first rack 17 is meshed with one of the main gears 16, and the other main gear 16 is meshed with the second rack 18. When the piston 11 moves upward, it synchronously drives the first rack 17 to move. The first rack 17 meshes and drives the main gear 16 to rotate around the shaft column 15, and then the main gear 16 will mesh and drive the second rack 18 to move toward the discharge pipe 4, and the second rack 18 will drive the flow control assembly to work.

[0038] In Example 1, the flow control component includes a gate plate 20, an opening 19 is provided on the discharge pipe 4, the gate plate 20 is inserted in the opening 19, a discharge port 21 is provided on the gate plate 20, a sleeve plate 22 is fixed on the top of the second rack 18, and an elastic connection is formed between the gate plate 20 and the sleeve plate 22, and a handle 25 is fixed on the top of the gate plate 20. When the second rack 18 moves, it will drive the sleeve plate 22 and the gate plate 20 to move together, so that the flow in the discharge pipe 4 can be gradually reduced through the discharge port 21. The staff can observe the total amount of raw materials in the sand mold 12 through the window 43 during feeding. If it is determined that the flow rate needs to be increased, it is only necessary to move the gate plate 20 toward the sleeve plate 22 through the handle 25, thereby facilitating the flow control operation.

[0039] Among them, a slot 23 for inserting the gate plate 20 is opened in the sleeve plate 22, and a first spring 24 is fixed to the inner wall of the slot 23. The other end of the first spring 24 is fixedly connected to the gate plate 20. In this way, the gate plate 20 and the sleeve plate 22 can be elastically connected through the first spring 24, and the gate plate 20 can be pulled by the handle 25 to control the flow.

[0040] In Example 2, the flow control component includes a spherical valve core 27 located in the discharge pipe 4, and a shaft 26 rotatably connected to the discharge pipe 4 is fixed on the valve core 27. A handwheel 33 and a sub-gear 29 are respectively installed at both ends of the shaft 26. The second rack 18 is elastically connected to the sub-rack 28, and the sub-rack 28 is meshed with the sub-gear 29. A guide sleeve 30 is fixed to the side of the frame rod 7, and the second rack 18 passes through the guide sleeve 30. When the second rack 18 moves, it synchronously drives the sub-rack 28 to move. Then the sub-rack 28 will mesh and drive the sub-gear 29 to rotate, and the sub-gear 29 will synchronously drive the shaft 26 and the valve core 27 to rotate, so that the flow in the discharge pipe 4 can be gradually reduced through the valve core 27. Similarly, the staff can also observe the total amount of raw materials in the sand mold 12 through the window 43 during feeding. If it is determined that the flow needs to be increased, it is only necessary to rotate the valve core 27 in the opposite direction through the handwheel 33, thereby conveniently performing the flow control operation.

[0041] Among them, the inner end fixed sleeve of the second rack 18 is provided with a sliding sleeve 31 that is sleeved on the auxiliary rack 28. The auxiliary rack 28 and the second rack 18 are connected by a third spring 32. In this way, when the valve core 27 is rotated in the opposite direction, the auxiliary rack 28 will compress the third spring 32 and move in the direction closer to the second rack 18.

[0042] Among them, a sliding opening 34 is opened on the vertical part 8, and a slider 35 is slidably connected in the sliding opening 34. The slider 35 is fixedly connected to the cover tube 9. A second spring 36 is fixed on the top of the slider 35. The top end of the second spring 36 is fixedly connected to the top wall of the sliding opening 34. Under the elastic force of the second spring 36, the cover tube 9 will be pressed tightly against the sand mold 12, thereby improving the sealing between the cover tube 9 and the sand mold 12.

[0043] Furthermore, a pair of vertical plates 37 symmetrically distributed front and back are fixed on the top of the base 1, and a pressure plate 38 is slidably connected to the vertical plates 37, and a screw 39 is rotatably connected to the vertical plates 37. The screw 39 is threadedly connected to the pressure plate 38. After the sand mold 12 is placed on the base 1, the screw 39 is rotated to drive the pressure plate 38 to move downward along the vertical plates 37, so that the sand mold 12 can be pressed and fixed by the pressure plate 38.

[0044] Furthermore, a plurality of evenly distributed conveying rollers 40 are rotatably connected in the base 1. Two pulleys 41 are fixedly sleeved at the front end of the conveying roller 40. The same belt 42 is sleeved between two adjacent pulleys 41. The two adjacent belts 42 are staggered. When the sand mold 12 is pushed along the conveying roller 40, the conveying roller 40 will rotate, so that the sand mold 12 can be moved conveniently and labor-savingly.

[0045] Among them, the sleeve 5 is threadedly connected to the discharge pipe 4, and a runner 6 is fixed on the sleeve 5. The sleeve 5 is rotated by the runner 6 to drive the sleeve 5 to move downward along the axial direction of the discharge pipe 4 until the sleeve 5 is pressed against the sand mold 12, thereby strengthening the sealing between the sleeve 5 and the sand mold 12.

[0046] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A ductile iron casting molding device, comprising a base (1) and a bracket (2), characterized in that: A sand mold (12) is placed on the top of the base (1), a liquid bucket (3) is fixed on the bracket (2), a sleeve (5) that can move up and down is connected to the discharge pipe (4) of the liquid bucket (3), a frame rod (7) is fixed on the top of the base (1), a cover tube (9) is elastically connected to the vertical part (8) of the frame rod (7), a window (43) is installed on the cover tube (9), a positioning ring (10) is arranged in the cover tube (9), and a piston (10) located on the positioning ring (10) is arranged in the cover tube (9). 1), the piston (11) is connected to a transmission assembly, a flow control assembly is arranged on the discharge pipe (4), the sleeve (5) is aligned with the feed port (13), the cover tube (9) is aligned with the exhaust port (14), raw materials are injected into the sand mold (12) through the liquid hopper (3), and high-temperature gas enters the cover tube (9) from the exhaust port (14), thereby pushing the piston (11) to move upward, and then the piston (11) drives the flow control assembly to work through the transmission assembly, so that the flow rate of the discharge pipe (4) gradually decreases.

2. A ductile iron casting molding device according to claim 1, characterized in that: The transmission assembly comprises a shaft column (15) rotatably connected to the vertical portion (8), main gears (16) are fixedly sleeved at both ends of the shaft column (15), a first rack (17) passing through the cover tube (9) is fixed to the top end of the piston (11), the first rack (17) is meshedly connected to one of the main gears (16), and the other main gear (16) is meshedly connected to a second rack (18).

3. A ductile iron casting molding device according to claim 2, characterized in that: The flow control component comprises a gate plate (20), an opening (19) is provided on the discharge pipe (4), the gate plate (20) is inserted into the opening (19), a discharge port (21) is provided on the gate plate (20), a sleeve plate (22) is fixed on the top of the second rack (18), an elastic connection is formed between the gate plate (20) and the sleeve plate (22), and a handle (25) is fixed on the top of the gate plate (20).

4. A ductile iron casting molding device according to claim 3, characterized in that: The sleeve plate (22) is provided with a slot (23) for inserting the gate plate (20), and a first spring (24) is fixed to the inner wall of the slot (23), and the other end of the first spring (24) is fixedly connected to the gate plate (20).

5. A ductile iron casting molding device according to claim 2, characterized in that: The flow control component comprises a spherical valve core (27) located in the discharge pipe (4), a shaft (26) rotatably connected to the discharge pipe (4) is fixed on the valve core (27), a hand wheel (33) and a sub-gear (29) are respectively installed at both ends of the shaft (26), the second rack (18) is elastically connected to the sub-rack (28), the sub-rack (28) is meshingly connected to the sub-gear (29), a guide sleeve (30) is fixed on the side of the frame rod (7), and the second rack (18) passes through the guide sleeve (30).

6. A ductile iron casting molding device according to claim 5, characterized in that: The inner end fixed sleeve of the second rack (18) is provided with a sliding sleeve (31) sleeved on the auxiliary rack (28), and the auxiliary rack (28) and the second rack (18) are connected via a third spring (32).

7. A ductile iron casting molding device according to claim 1, characterized in that: The vertical portion (8) is provided with a sliding opening (34), a slider (35) is slidably connected in the sliding opening (34), the slider (35) is fixedly connected to the cover tube (9), a second spring (36) is fixed on the top of the slider (35), and the top end of the second spring (36) is fixedly connected to the top wall of the sliding opening (34).

8. A ductile iron casting molding device according to claim 1, characterized in that: A pair of vertical plates (37) symmetrically distributed front and back are fixed on the top of the base (1); a pressing plate (38) is slidably connected to the vertical plates (37); a screw rod (39) is rotatably connected to the vertical plates (37); and the screw rod (39) is threadedly connected to the pressing plate (38).

9. A ductile iron casting molding device according to claim 1, characterized in that: A plurality of evenly distributed conveying rollers (40) are rotatably connected in the base (1); two belt pulleys (41) are fixedly sleeved at the front end of the conveying roller (40); a same belt (42) is sleeved between two adjacent belt pulleys (41); and two adjacent belts (42) are staggered.

10. A ductile iron casting molding device according to claim 1, characterized in that: The sleeve (5) is threadedly connected to the discharge pipe (4), and a rotating wheel (6) is fixedly sleeved on the sleeve (5).

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