Lost foam casting device for nodular cast iron pipe fitting

Abstract

The invention relates to the technical field of evanescent mode casting equipment, and particularly discloses a nodular cast iron pipe evanescent mode casting device which comprises a mounting frame of a double-ring structure and further comprises a casting mechanism fixedly mounted at the top of the mounting frame. When quartz sand is injected, the pipe fitting model is supported and fixed through the combined effect of the cladding plate and the supporting plate, and the problem that the pipe fitting model inclines under the pressure effect when the quartz sand is injected, and casting is affected is solved; meanwhile, the bottom of the model is automatically disconnected from the cladding plate and the supporting plate in advance when casting is carried out through the casting gate, and at the moment, a cavity between the bottom of the model and the base plate is filled with quartz sand, so that the model is completely immersed in the quartz sand when the model is cast; the problem that in the prior art, the bottom of a model makes direct contact with the bottom of a sand box, and after follow-up casting is completed, a formed pipe fitting is prone to adhering to the bottom of the sand box is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lost foam casting equipment, in particular to a nodular cast iron pipe fitting lost foam casting device. BACKGROUND

[0002] In the field of nodular cast iron pipe fitting production, lost foam casting technology is widely used because it can realize near-net forming of complex shape pipe fittings. Through the coordinated operation of foam model, quartz sand filling and metal liquid casting, high precision castings are directly obtained. A special lost foam casting device needs to have model positioning, sand compaction, negative pressure maintenance and casting demolding functions, and its performance directly affects the dimensional accuracy, surface quality and production efficiency of the pipe fitting, which is the key equipment to promote the large-scale production of nodular cast iron pipe fittings.

[0003] The existing nodular cast iron pipe fitting lost foam casting device has many limitations. In the aspect of model positioning, the traditional device lacks a stable support structure, and the foam model is prone to tilt or displacement during the quartz sand filling process due to pressure, resulting in casting shape deviation; and the model bottom often directly contacts the bottom of the sand box, which is prone to adhesion with the sand box after casting, increasing the difficulty of demolding. In terms of sand treatment, the traditional equipment cannot achieve uniform compaction of quartz sand, and the casting process is prone to casting defects due to sand collapse; at the same time, the sealing and negative pressure control effect of the sand box is not good, and the quartz sand needs to be manually cleaned, which has low automation and restricts the continuity of production. In addition, the traditional device lacks a targeted vibration compaction mechanism, and the quartz sand filling density is uneven, which not only affects the casting quality, but also leads to poor residual and export of sand, further increasing production energy consumption and cost. SUMMARY

[0004] (I) Technical problems solved The present application provides a nodular cast iron pipe fitting lost foam casting device, which solves the problems mentioned in the background art.

[0005] (II) Technical solutions To achieve the above purpose, the present application is implemented by the following technical solutions: a nodular cast iron pipe fitting lost foam casting device, comprising a mounting frame, the mounting frame is provided as a double ring structure, further comprising: a casting mechanism, the casting mechanism is fixedly installed at the top of the mounting frame; a reinforcing mechanism, the reinforcing mechanism is fixedly installed inside the casting mechanism; wherein the casting mechanism comprises a sand box, the bottom of the sand box is fixedly connected to the inner surface of the top of the mounting frame, the top outer surface of the sand box is fixedly connected with a bearing ring, the upper surface of the bearing ring is fixedly connected with a slide rod, the slide rod is fixedly provided with four at an equal interval around the center axis of the bearing ring, the top of the slide rod is fixedly connected with a top ring, the slide rod is slidably connected with a sliding ring, the inner surface of the sliding ring is fixedly connected with a top disc, the upper surface of the top disc is provided with a pouring opening, wherein the pouring opening is initially in a closed state.

[0006] According to one of the embodiments of the present application, the middle upper surface of the top plate is fixedly connected with a motor, the output end of the motor is rotationally connected with a first telescopic rod, the middle inner surface of the sand box is fixedly connected with a bottom plate, and the bottom of the first telescopic rod penetrates through the bottom plate.

[0007] According to one of the embodiments of the present application, the bottom outer surface of the first telescopic rod is rotationally connected with a connecting frame, the end of the connecting frame away from the first telescopic rod is fixedly sleeved with a base, the base is disc-shaped, three bases are fixedly arranged at intervals around the central axis of the connecting frame, the upper surfaces of the bases are symmetrically fixedly connected with cladding plates, the cladding plates are arc-shaped, and two cladding plates on the same base are combined into a tubular shape.

[0008] According to one of the embodiments of the present application, the top of the cladding plate penetrates through and is slidingly connected to the upper surface of the bottom plate, the middle upper surface of the base is fixedly connected with a support plate, the support plate is arranged between the two cladding plates on the same base, the top of the support plate penetrates through and is slidingly connected to the upper surface of the bottom plate, and the top of the support plate is lower than the top of the cladding plate.

[0009] According to one of the embodiments of the present application, the bottom outer surface of the first telescopic rod is sleeved with a magnet ring through magnetic adsorption, the magnet ring is rotationally embedded in the middle inner surface of the bottom plate, the middle bottom surface of the bottom plate is fixedly connected with a limiting cover, the limiting cover and the bottom plate are arranged on the same central axis, the upper surface of the limiting cover is provided with a sliding groove, and the connecting frame is slidingly connected in the sliding groove.

[0010] According to one of the embodiments of the present application, the reinforcing mechanism comprises an inner stake, the inner stake is cylindrical, the bottom of the inner stake is fixedly connected to the middle upper surface of the bottom plate, the first telescopic rod penetrates through the inner stake, the inner stake and the bottom plate are arranged on the same central axis, the bottom of the limiting cover is fixedly connected with a mounting table, the mounting table is fixedly connected to the bottom inner surface of the sand box, a driving disc is arranged below the mounting table, the driving disc is slidingly connected to the bottom inner surface of the sand box, the bottom of the first telescopic rod is rotationally connected to the middle upper surface of the driving disc through the mounting table, the upper surface of the driving disc is fixedly connected with a hose, and the end of the hose away from the driving disc is fixedly connected to the edge upper surface of the top plate.

[0011] According to one embodiment of the present application, the mounting table is provided in a conical shape, the bottom outer surface of the sand box is provided with a sand outlet, the sand outlet is arranged above the outer side of the mounting table, the edge upper surface of the bottom plate is provided with a movable opening, the movable opening is arranged at a fixed interval around the central axis of the bottom plate, the movable opening is provided with a movable plate, the movable plate is initially arranged below the movable opening, the upper surface of both ends of the movable plate is provided with a limiting rod connected in a sliding manner, the bottom of the limiting rod is fixedly connected to the upper surface of the mounting table, the lower surface of the middle part of the movable plate is fixedly connected with a second telescopic rod, the bottom of the second telescopic rod is fixedly connected to the lower surface of the mounting table, and the internal cavity of the second telescopic rod is in communication with the internal cavity of the first telescopic rod through the mounting table.

[0012] According to one embodiment of the present application, the inner pile is provided with an installation groove in the inside, the middle inner surface of the installation groove is fixedly connected with a stop block, and the stop block is arranged at a fixed interval along the central axis of the installation groove.

[0013] According to one embodiment of the present application, the outer surface of the first telescopic rod is symmetrically provided with a limiting groove, the outer surface of the first telescopic rod is sleeved with a mounting ring through the limiting groove sliding up and down, the outer surface of the mounting ring is hinged with a rotating plate through a torsional spring, the outer end of the rotating plate is fixedly connected with a knocking column, the top of the mounting groove is rotatably embedded with an upper connecting ring, the bottom of the mounting groove is rotatably embedded with a lower connecting ring, a connecting rod is fixedly connected through the mounting ring, and the upper and lower ends of the connecting rod are fixedly connected on the upper connecting ring and the lower connecting ring, respectively. When the pipe is needed to be lost foam cast, the foam model of the pipe is placed in the sand box, then the quartz sand is introduced into the sand box until the pipe model is filled and submerged, then the top disc is driven to move down by the external hydraulic equipment, and finally the top disc moves down along the sliding ring and the sliding rod until it is buckled with the sand box. At this time, the iron liquid can be poured into the foam model in the sand box through the pouring port, and finally the iron liquid is melted and filled into the cavity of the foam model under the action of high temperature. After waiting for cooling, the pipe is formed, and the casting of the pipe is completed. When the pipe model is placed in the sand box, the bottom thereof is inserted into the inner surfaces of the two cladding plates. At this time, due to the limiting of the supporting plate, a part of the bottom of the pipe model is inserted into the cladding plate and the supporting plate, and the bottom is hollow and does not contact the bottom disc. When the quartz sand is introduced and the top disc is driven to move down, the motor is started synchronously. After the motor is started, the first telescopic rod starts to rotate, and the first telescopic rod starts to shrink synchronously with the movement of the top disc. When the bottom inner surface of the sliding ring just starts to contact the top outer surface of the sand box, the first telescopic rod shrinks to the maximum extent. At this time, the top disc starts to push the first telescopic rod to move down synchronously, and the bottom of the first telescopic rod starts to move down relative to the magnet ring, thereby driving the connecting frame to move down. With the movement of the connecting frame, the base fixedly connected to the outer end of the connecting frame starts to move down, thereby driving the cladding plate and the supporting plate to move down along the bottom disc through the movement of the base.

[0014] (Three) beneficial effects The present application provides a nodular cast iron pipe lost foam casting device. It has the following beneficial effects: (I) The present spheroidal graphite cast iron pipe fitting lost foam casting device, when the top disc is completely buckled with the top of the sand box through the sliding ring, the upper surface of the cladding plate also forms a plane with the upper surface of the bottom disc, thereby supporting and fixing the pipe fitting model through the combined action of the cladding plate and the supporting plate during quartz sand injection, avoiding the problem that the pipe fitting model is inclined under the action of pressure during quartz sand injection, affecting casting, and at the same time, the model bottom is automatically disconnected from the cladding plate and the supporting plate in advance during casting through the casting port, and the cavity between the model bottom and the bottom disc is filled with quartz sand at this time, thereby completely immersing the model in the quartz sand during casting, avoiding the problem that the bottom of the model directly contacts the bottom of the sand box in the prior art, and the formed pipe fitting is easily adhered to the bottom of the sand box after subsequent casting is completed.

[0015] (II) The present spheroidal graphite cast iron pipe fitting lost foam casting device, after the top of the sand box is closed, it is automatically extracted to a negative pressure state, so that the entire casting process is in a negative pressure state, greatly improving the stability of the quartz sand in the sand box, avoiding the problem of quartz sand collapse during casting, and at the same time, the movable plate seals the movable port to complete the sealing of the sand box when the top disc moves down, and opens the movable port when the top disc starts to move up, automatically guiding the quartz sand out after the pipe fitting casting is completed, greatly improving the automation degree of the device, avoiding the problem of reducing production efficiency caused by manual cleaning of the quartz sand.

[0016] (III) The present spheroidal graphite cast iron pipe fitting lost foam casting device, when the first telescopic rod starts to rotate, it drives the installation ring to rotate synchronously, and finally drives the upper and lower connecting rings to rotate as a whole in the installation slot of the inner stake through the connecting rod, so that the knocking column connected by the hinged rotating plate on the installation ring continuously collides with the stop block, thereby generating a knocking vibration force on the inner stake during casting, so that the quartz sand in the sand box is vibrated and compacted during casting, greatly improving the working stability of the quartz sand during casting, greatly reducing the problem of quartz sand collapse during casting, and at the same time, the quartz sand can also be provided with a vibration cleaning effect when the top disc moves up to guide the quartz sand out, improving the guiding speed of the quartz sand, and avoiding the problem of blockage. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic diagram of the present application; Figure 2 is the schematic diagram of the sand box and its connecting structure of the present application; Figure 3 is the internal structure schematic diagram of the sand box of the present application; Figure 4 is the internal structure schematic diagram of the inner stake of the present application; Figure 5 is the structure schematic diagram of the bottom disc of the present application; Figure 6 This is a schematic diagram of the connecting frame and its connecting structure of the present invention; Figure 7 This is a schematic diagram of the base and its connection structure of the present invention; Figure 8 It is a schematic diagram of the mounting ring and its connection structure of the present invention.

[0018] In the figure: 1. Mounting frame; 2. Casting mechanism; 21. Sand box; 22. Carrying ring; 23. Slide rod; 24. Top ring; 25. Slide ring; 26. Top plate; 27. Casting gate; 28. Motor; 29. ​​No. 1 telescopic rod; 210. Chassis; 211. Connecting frame; 212. Base; 213. Covering plate; 214. Support plate; 215. Magnet ring; 216. Limit cover; 217. Slide chute; 3. Increase Strong mechanism; 31. Inner pile; 32. Mounting platform; 33. Driving disc; 34. Hose; 35. Sand outlet; 36. Movable opening; 37. Movable plate; 38. Limit rod; 39. No. 2 telescopic rod; 310. Mounting slot; 311. Stop block; 312. Limit slot; 313. Mounting ring; 314. Rotating plate; 315. Knocking column; 316. Upper connecting ring; 317. Lower connecting ring; 318. Connecting rod. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] First embodiment: Figures 1 to 8 As shown, the present invention provides a technical solution: a lost foam casting device for ductile iron pipe fittings, comprising a mounting frame 1, the mounting frame 1 being configured as a double-ring structure, and further comprising: The casting mechanism 2 is fixedly mounted on the top of the mounting frame 1; The reinforcing mechanism 3 is fixedly installed inside the casting mechanism 2; The casting mechanism 2 includes a sand box 21, the bottom of the sand box 21 is fixedly connected to the top inner surface of the mounting frame 1, the top outer surface of the sand box 21 is fixedly connected to a carrying ring 22, the upper surface of the carrying ring 22 is fixedly connected to a sliding rod 23, four sliding rods 23 are arranged at fixed intervals around the central axis of the carrying ring 22, the top of the sliding rod 23 is fixedly connected to a top ring 24, a sliding ring 25 is slidably connected to the sliding rod 23, the inner surface of the sliding ring 25 is fixedly connected to a top plate 26, and a casting port 27 is opened through the upper surface of the top plate 26, wherein the casting port 27 is initially in a closed state.

[0021] The middle upper surface of the top disc 26 is fixedly connected with a motor 28, the output end of the motor 28 is rotationally connected with a first telescopic rod 29, the middle inner surface of the sand box 21 is fixedly connected with a bottom disc 210, and the bottom of the first telescopic rod 29 penetrates through the bottom disc 210.

[0022] The bottom outer surface of the first telescopic rod 29 is rotationally connected with a connecting frame 211, the end of the connecting frame 211 away from the first telescopic rod 29 is fixedly sleeved with a base 212, the base 212 is disc-shaped, three bases 212 are fixedly arranged at equal intervals around the central axis of the connecting frame 211, the upper surfaces of the bases 212 are symmetrically fixedly connected with cladding plates 213, the cladding plates 213 are arc-shaped, and two cladding plates 213 on the same base 212 are combined into a tubular shape.

[0023] The top of the cladding plate 213 penetrates through and is slidingly connected to the upper surface of the bottom disc 210, the middle upper surface of the base 212 is fixedly connected with a support plate 214, the support plate 214 is arranged between the two cladding plates 213 on the same base 212, the top of the support plate 214 penetrates through and is slidingly connected to the upper surface of the bottom disc 210, and the top of the support plate 214 is lower than the top of the cladding plate 213.

[0024] The bottom outer surface of the first telescopic rod 29 is sleeved with a magnet ring 215 through magnetic adsorption, the magnet ring 215 is rotationally embedded in the middle inner surface of the bottom disc 210, the middle bottom surface of the bottom disc 210 is fixedly connected with a limiting cover 216, the limiting cover 216 and the bottom disc 210 are arranged on the same central axis, the upper surface of the limiting cover 216 is provided with a sliding groove 217, and the connecting frame 211 is slidingly connected in the sliding groove 217.

[0025] The second embodiment is shown in FIG. 2. Figures 1 to 8 The reinforcing mechanism 3 includes an inner stake 31, the inner stake 31 is cylindrical, the bottom of the inner stake 31 is fixedly connected to the middle upper surface of the bottom disc 210, the first telescopic rod 29 penetrates through the inner stake 31, the inner stake 31 and the bottom disc 210 are arranged on the same central axis, the bottom of the limiting cover 216 is fixedly connected with a mounting table 32, the mounting table 32 is fixedly connected to the bottom inner surface of the sand box 21, a driving disc 33 is arranged below the mounting table 32, the driving disc 33 is slidingly connected to the bottom inner surface of the sand box 21, the bottom of the first telescopic rod 29 penetrates through the mounting table 32 and is rotationally connected to the middle upper surface of the driving disc 33, the upper surface of the driving disc 33 penetrates through and is fixedly connected with a hose 34, and the end of the hose 34 away from the driving disc 33 penetrates through and is fixedly connected to the upper surface of the edge of the top disc 26.

[0026] The mounting table 32 is arranged in a conical shape, the bottom outer surface of the sand box 21 is provided with a sand outlet 35, the sand outlet 35 is arranged above the outer side of the mounting table 32, the edge upper surface of the bottom disc 210 is provided with three movable openings 36 arranged at a fixed interval around the central axis of the bottom disc 210, the movable openings 36 are provided with movable plates 37, the movable plates 37 are initially arranged below the movable openings 36, the upper surfaces of the two ends of the movable plates 37 are provided with limiting rods 38 connected in a sliding manner, the bottom of the limiting rods 38 is fixedly connected to the upper surface of the mounting table 32, the lower surface of the middle part of the movable plates 37 is fixedly connected with the second telescopic rod 39, the bottom of the second telescopic rod 39 is fixedly connected to the lower surface of the mounting table 32, and the internal cavities of the first telescopic rod 29 and the second telescopic rod 39 are communicated through the mounting table 32.

[0027] The inner pile 31 is internally provided with a mounting groove 310, the inner surface of the middle part of the mounting groove 310 is fixedly connected with a stop block 311, and the stop block 311 is arranged at a fixed interval along the central axis of the mounting groove 310.

[0028] The outer surface of the first telescopic rod 29 is symmetrically provided with a limiting groove 312, the outer surface of the first telescopic rod 29 is slidably sleeved with a mounting ring 313 through the limiting groove 312, the outer surface of the mounting ring 313 is hingedly connected with a rotating plate 314 through a torsion spring, the outer end of the rotating plate 314 is fixedly connected with a knocking column 315, the top of the mounting groove 310 is rotatably embedded with an upper connecting ring 316, the bottom of the mounting groove 310 is rotatably embedded with a lower connecting ring 317, and the mounting ring 313 is fixedly connected with a connecting rod 318, and the upper and lower ends of the connecting rod 318 are fixedly connected to the upper connecting ring 316 and the lower connecting ring 317, respectively.

[0029] In work, when the pipe needs to be lost foam casting, the pipe foam model can be placed in the sand box 21, then the quartz sand is poured into the sand box 21 until the pipe model is filled and submerged, then the top disc 26 is driven to move down by the external hydraulic equipment, finally the top disc 26 moves down along the sliding rod 23 through the sliding ring 25 until it is buckled with the sand box 21, at this time the iron liquid can be poured into the foam model in the sand box 21 through the pouring port 27, finally the iron liquid melts the foam and fills the cavity of the foam model under the action of high temperature, after waiting for cooling, the pipe is formed, the casting of the pipe is completed, when the pipe model is placed in the sand box 21, the bottom of the pipe model is inserted into the inner surface of the two cladding plates 213, at this time, due to the limiting of the supporting plate 214, the bottom of the pipe model is inserted into the cladding plate 213 and the supporting plate 214, and the bottom is hollow and does not contact with the bottom disc 210, when the quartz sand is poured in and the top disc 26 is driven to move down, the motor 28 is started synchronously, after the motor 28 is started, the first telescopic rod 29 starts to rotate, and as the top disc 26 moves down, the first telescopic rod 29 starts to shrink synchronously, that is, the first telescopic rod 29 starts to rotate and shrink, when the bottom inner surface of the sliding ring 25 just starts to contact with the top outer surface of the sand box 21, the first telescopic rod 29 shrinks to the maximum extent, at this time, as the top disc 26 moves down, the first telescopic rod 29 starts to move down synchronously, and then the bottom of the first telescopic rod 29 starts to move down relative to the magnet ring 215, and then drives the connecting frame 211 to move down, as the connecting frame 211 moves down, it starts to drive the base 212 fixedly connected to the outer end to move down, so that the base 212 drives the cladding plate 213 and the supporting plate 214 to move down along the bottom disc 210, when the top disc 26 is completely buckled with the top of the sand box 21 through the sliding ring 25, the upper surface of the cladding plate 213 also forms a plane with the upper surface of the bottom disc 210 at the same time, so that the pipe model is supported and fixed by the combination of the cladding plate 213 and the supporting plate 214 when the quartz sand is poured in, avoiding the problem that the pipe model is inclined under the action of pressure when the quartz sand is poured in and affects casting, at the same time, the model bottom is automatically disconnected with the cladding plate 213 and the supporting plate 214 in advance when casting through the casting port 27, and the cavity between the model bottom and the bottom disc 210 is filled with quartz sand at this time, so that the model is completely immersed in the quartz sand when casting, avoiding the problem that the bottom of the model directly contacts with the bottom of the sand box 21 in the prior art, and the formed pipe is easy to adhere to the bottom of the sand box 21 after subsequent casting is completed, when the first telescopic rod 29 starts to move down relative to the inner post 31, it synchronously drives the driving disc 33 to move down along the bottom of the sand box 21, and then the cavity between the driving disc 33 and the mounting table 32 is stretched and increased, that is, the cavity between the mounting table 32 and the driving disc 33 starts to be in a negative pressure state, finally the air pressure is extracted from the top of the sand box 21 through the hose 34, and at this time the top disc 26 has started to be inserted with the top of the sand box 21 through the sliding ring 25,At this time, the sand box 21 above the chassis 210 is in a closed state, and the connection of the hose 34 makes the upper part of the sand box 21 in a negative pressure state, so that the top of the sand box 21 is automatically extracted to a negative pressure state after being closed, so that the whole casting process is in a negative pressure state, which greatly improves the stability of the quartz sand in the sand box 21, avoids the problem of collapse of the quartz sand in the casting process, and the chassis 210 is provided with a movable port 36, and the movable plate 37 at the movable port 36 is initially arranged below the movable port 36, that is, the movable port 36 is in an open state after the pipe model is placed in the sand box 21 before casting. At this time, the top plate 26 starts to gradually descend after the pipe model is placed, and initially, the first telescopic rod 29 is retracted as the top plate 26 descends, that is, the air pressure in the first telescopic rod 29 starts to rise, and then the air pressure in the first telescopic rod 29 is delivered to the second telescopic rod 39, so that the air pressure in the second telescopic rod 39 rises, and then the movable plate 37 starts to move upwards along the limiting rod 38 until the movable port 36 is blocked and closed. Then the quartz sand is poured into the sand box 21, and the top plate 26 continues to be driven to move downwards until the top plate 26 is buckled with the sand box 21 through the sliding ring 25 when the pipe casting is completed. When the pipe casting is completed, the top plate 26 is driven to move upwards, and initially the first telescopic rod 29 starts to expand as the top plate 26 moves upwards, so that the inside is in a negative pressure state, that is, the air pressure in the second telescopic rod 39 is extracted, so that the second telescopic rod 39 starts to contract, and then the movable plate 37 is pulled to move downwards to open the movable port 36, and then the quartz sand in the sand box 21 is discharged, so that the movable plate 37 closes the movable port 36 to seal the sand box 21 when the top plate 26 moves downwards, and the movable port 36 is opened when the top plate 26 starts to move upwards, so that the quartz sand is automatically discharged after the pipe casting is completed. The degree of automation of the device is greatly improved, the problem of reduced production efficiency caused by manual cleaning of the quartz sand is avoided, and the first telescopic rod 29 is provided with a limiting groove 312, that is, when the first telescopic rod 29 starts to rotate, the mounting ring 313 is synchronously rotated, and finally the upper connecting ring 316 and the lower connecting ring 317 are integrally rotated in the mounting groove 310 of the inner post 31 through the connecting rod 318, so that the knocking column 315 connected with the stop block 311 through the hinged rotating plate 314 on the mounting ring 313 is continuously impacted, so that a vibration force is generated on the inner post 31 during casting, so that the quartz sand in the sand box 21 is vibrated and compacted during casting, the working stability of the quartz sand during casting is greatly improved, and the problem of collapse of the quartz sand during casting is greatly reduced. When the top plate 26 moves upwards to discharge the quartz sand, it can also provide a vibration cleaning effect, improve the discharge speed of the quartz sand, and avoid the problem of blockage.

[0030] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. It is to be understood that the terms "including", "comprising", "consisting" and variations thereof do not preclude the addition of further integers to the claimed combination of integers. It is to be understood that the terms "including", "comprising", "consisting" and variations thereof encompass the various features of the embodiments described herein, and are not restricted to the use of only the most preferred embodiments. It is further to be understood that the use of relational terms such as first and second, and the like, do not denote a physical or logical order or relationship among the various elements, but are used simply for distinguishing between various elements for clarity. It is to be understood that the terms "comprising", "including", and "having" and variations thereof are intended to be equivalent and open-ended, and include the various embodiments of the present application as recited in the claims. It is to be understood that the terms "including", "comprising", "consisting" and variations thereof encompass the various features of the embodiments described herein, and are not restricted to the use of only the most preferred embodiments. It is further to be understood that the use of relational terms such as first and second, and the like, do not denote a physical or logical order or relationship among the various elements, but are used simply for distinguishing between various elements for clarity. It is to be understood that the terms "comprising", "including", and "having" and variations thereof are intended to be equivalent and open-ended, and include the various embodiments of the present application as recited in the claims.

[0031] While the embodiments of the application have been shown and described herein, it is understood that modifications, substitutions, changes, and alterations can be made by those of ordinary skill in the art without departing from the spirit and scope of the present application, which is defined by the following claims and their equivalents.

Claims

1. A device for lost foam casting of ductile iron pipe fittings, comprising a mounting frame (1), characterized in that: The mounting frame (1) is configured as a double-ring structure and further comprises: A casting mechanism (2), wherein the casting mechanism (2) is fixedly mounted on the top of the mounting frame (1); A reinforcing mechanism (3), the reinforcing mechanism (3) being fixedly mounted inside the casting mechanism (2); The casting mechanism (2) includes a sand box (21), the bottom of the sand box (21) is fixedly connected to the top inner surface of the mounting frame (1), the top outer surface of the sand box (21) is fixedly connected to a carrying ring (22), the upper surface of the carrying ring (22) is fixedly connected to a sliding rod (23), four sliding rods (23) are arranged at fixed intervals around the central axis of the carrying ring (22), the top of the sliding rod (23) is fixedly connected to a top ring (24), the sliding rod (23) is slidably connected to a sliding ring (25), the inner surface of the sliding ring (25) is fixedly connected to a top plate (26), the upper surface of the top plate (26) is provided with a casting port (27), wherein the casting port (27) is initially in a closed state.

2. The lost foam casting device for ductile iron pipe fittings according to claim 1, characterized in that: A motor (28) is fixedly connected to the middle upper surface of the top plate (26), and an output end of the motor (28) is rotatably connected to a first telescopic rod (29). A bottom of the first telescopic rod (29) is fixedly connected to the middle inner surface of the sand box (21), and a bottom of the first telescopic rod (29) is arranged to pass through the bottom plate (210).

3. The lost foam casting device for ductile iron pipe fittings according to claim 2, characterized in that: The outer surface of the bottom of the No. 1 telescopic rod (29) is rotatably connected to a connecting frame (211), and one end of the connecting frame (211) away from the No. 1 telescopic rod (29) is fixedly sleeved with a base (212), and the base (212) is configured to be disc-shaped, and three bases (212) are configured at fixed intervals around the central axis of the connecting frame (211), and the upper surface of the base (212) is symmetrically fixedly connected to a covering plate (213), and the covering plate (213) is configured to be arc-shaped, and the two covering plates (213) on the same base (212) are combined into a nearly tubular shape.

4. The lost foam casting device for ductile iron pipe fittings according to claim 3, characterized in that: The top of the covering plate (213) is connected to the upper surface of the chassis (210) through sliding, and the middle upper surface of the base (212) is fixedly connected with a support plate (214), and the support plate (214) is arranged between two covering plates (213) on the same base (212), and the top of the support plate (214) is connected to the upper surface of the chassis (210) through sliding, wherein the top height of the support plate (214) is lower than the top height of the covering plate (213).

5. The lost foam casting device for ductile iron pipe fittings according to claim 4, characterized in that: The bottom outer surface of the first telescopic rod (29) is provided with a magnet ring (215) through a magnetic adsorption sleeve, and the magnet ring (215) is rotatably embedded in the middle inner surface of the chassis (210). The middle bottom surface of the chassis (210) is fixedly connected to a limiting cover (216), and the limiting cover (216) and the chassis (210) are set to the same central axis. The upper surface of the limiting cover (216) begins to have a slide groove (217), and the connecting frame (211) is slidably connected in the slide groove (217) up and down.

6. The lost foam casting device for ductile iron pipe fittings according to claim 5, characterized in that: The reinforcing mechanism (3) includes an inner pile (31), the inner pile (31) is arranged in a cylindrical shape, the bottom of the inner pile (31) is fixedly connected to the middle upper surface of the chassis (210), the first telescopic rod (29) is arranged to pass through the inner pile (31), wherein the inner pile (31) and the chassis (210) are arranged to have the same central axis, the bottom of the limiting cover (216) is fixedly connected to a mounting platform (32), and the mounting platform (32) is fixedly connected to the inner surface of the bottom of the sand box (21). A driving disk (33) is provided below the mounting platform (32), and the driving disk (33) is slidably connected to the bottom inner surface of the sand box (21). The bottom of the No. 1 telescopic rod (29) passes through the mounting platform (32) and is rotatably connected to the middle upper surface of the driving disk (33). A hose (34) is fixedly connected to the upper surface of the driving disk (33), and one end of the hose (34) away from the driving disk (33) passes through and is fixedly connected to the upper edge surface of the top plate (26).

7. The lost foam casting device for ductile iron pipe fittings according to claim 6, characterized in that: The mounting platform (32) is configured to be conical, a sand outlet (35) is provided through the outer surface of the bottom of the sand box (21), and the sand outlet (35) is provided above the outer side of the mounting platform (32), and a movable opening (36) is provided through the upper surface of the edge of the chassis (210), and three movable openings (36) are provided at fixed intervals around the central axis of the chassis (210), and a movable plate (37) is provided in contact with the movable opening (36), and the movable plate (37) is initially provided at the movable opening (36). ), the upper surfaces of both ends of the movable plate (37) are penetrated by sliding connection limit rods (38), the bottom of the limit rods (38) are fixedly connected to the upper surface of the mounting platform (32), and the middle lower surface of the movable plate (37) is fixedly connected to the second telescopic rod (39), the bottom of the second telescopic rod (39) is penetrated by fixed connection to the lower surface of the mounting platform (32), and the internal cavity of the second telescopic rod (39) is connected to the internal cavity of the first telescopic rod (29) through the mounting platform (32).

8. The lost foam casting device for ductile iron pipe fittings according to claim 7, characterized in that: A mounting groove (310) is provided inside the inner pile (31), and a stopper (311) is fixedly connected to the inner surface of the middle portion of the mounting groove (310). Six stoppers (311) are provided at fixed intervals along the central axis of the mounting groove (310).

9. The lost foam casting device for ductile iron pipe fittings according to claim 8, characterized in that: The outer surface of the No. 1 telescopic rod (29) is symmetrically provided with a limiting groove (312), and the outer surface of the No. 1 telescopic rod (29) is slidably sleeved with a mounting ring (313) through the limiting groove (312). The outer surface of the mounting ring (313) is hinged with a rotating plate (314) through a torsion spring, and the outer end of the rotating plate (314) is fixedly connected to a knocking column (315). The top of the mounting groove (310) is rotatably inlaid with an upper connecting ring (316), and the bottom of the mounting groove (310) is rotatably inlaid with a lower connecting ring (317). A connecting rod (318) is fixedly connected to the mounting ring (313), and the upper and lower ends of the connecting rod (318) are respectively fixedly connected to the upper connecting ring (316) and the lower connecting ring (317).

Images