Rotary pouring device for precise casting of gypsum mold fired mold

Abstract

The utility model belongs to the technical field of gypsum mold precision investment casting, and relates to a rotary pouring device for gypsum mold precision investment casting, which comprises a pouring tank, an automatic rotating mechanism and a control cabinet, and the automatic rotating mechanism comprises a casting mold fixing plate, a casting ladle fixing plate and a stepless speed change motor. The casting mold fixing plate and the casting ladle fixing plate are perpendicular to each other to form an L-shaped mounting base, the L-shaped mounting base is rotationally connected into the pouring tank through a driving rod, an output shaft of the stepless speed change motor is in transmission connection with the driving rod, the control cabinet is electrically connected with the stepless speed change motor, and two sets of horizontal sliding grooves which correspond to each other up and down are formed in the casting mold fixing plate. An L-shaped clamping plate is connected to the horizontal sliding groove in a sliding mode through a limiting assembly, a clamping assembly used for clamping a gypsum casting mold is arranged on the L-shaped clamping plate, and a casting ladle adjusting base is arranged on the casting ladle fixing plate. According to the device, alloy liquid turbulence can be reduced, the variable flow speed and variable flow of molten metal pouring are controllable, the yield of batch products can be improved, and the casting cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of gypsum mold investment precision casting, in particular to a gypsum mold investment precision casting rotary pouring device. Background Art

[0002] The gypsum mold pouring process refers to placing the gypsum mold in the appropriate position in the pouring tank after the alloy liquid is smelted, using a ladle to scoop the appropriate alloy liquid and place it on the ladle rack, closing the pouring tank door and locking it, and starting to evacuate. After the vacuum meets the process requirements, the pouring handle is manually operated outside the tank, and the alloy liquid is poured into the mold at a certain speed by rotating the ladle. The vacuum is then removed, the furnace door is opened to remove the ladle, the door is closed again and locked, and high-pressure air is introduced into the tank to solidify the casting under a certain pressure.

[0003] The pouring tank of the traditional gypsum casting device is generally single-door, and the double-door is mainly used for pouring some large castings. The entire pouring process has the following disadvantages for castings with high quality requirements:

[0004] 1) The efficiency of fixing the ladle position is low. The placement deviation of the mold gate and the ladle mouth before pouring requires the mold position to be adjusted each time, which has low work efficiency and safety hazards.

[0005] 2) The ladle is located at a high distance from the casting gate, which easily leads to turbulence and instability during the pouring process, and a greater tendency for air entrainment and slag inclusion.

[0006] 3) The flow rate and velocity of the alloy liquid in the casting process depend on the operator's skills. The quality of each casting varies greatly, and the qualified rate of castings by different operators also varies greatly. The flow rate and velocity of the entire casting process are greatly affected by human factors, and the quality control is unstable.

[0007] 4) The pouring process lacks digitization, the process stability is poor, the qualification rate of castings with high internal quality requirements is low, and the production cost is high.

[0008] Therefore, the technicians in this field are in urgent need of developing a new gypsum mold investment casting rotary pouring device. Utility Model Content

[0009] The purpose of the utility model is to solve the above-mentioned technical problems. A gypsum mold investment casting rotary pouring device is proposed. A double-door pouring tank is provided to facilitate the placement and removal of gypsum molds and ladles. The molds and ladles are efficiently positioned by an L-shaped mounting seat. The position of the mold and ladle is adjusted and rotary pouring is achieved by driving the L-shaped mounting seat with a stepless speed motor. A matching control cabinet is used to control the flow rate of the alloy liquid during the pouring process, thereby reducing human influence, thereby helping to ensure the production quality of castings and reducing production costs.

[0010] The technical solution proposed in this application is: a gypsum mold investment casting rotary pouring device, including a pouring tank, an automatic rotating mechanism and a control cabinet, both ends of the pouring tank can be opened and closed and sealed with tank doors, the automatic rotating mechanism includes a mold fixing plate, a ladle fixing plate and a continuously variable speed motor, the mold fixing plate and the ladle fixing plate are arranged perpendicular to each other to form an L-shaped mounting seat, the L-shaped mounting seat is rotatably connected to the inside of the pouring tank through a driving rod, the continuously variable speed motor and the control cabinet are arranged outside the pouring tank, and the output shaft of the continuously variable speed motor is connected to the The driving rod is connected in transmission, the control cabinet is electrically connected to the continuously variable speed motor, and two groups of horizontal slide grooves corresponding to the upper and lower groups are arranged on the mold fixing plate. An L-shaped clamping plate is slidably connected to each group of horizontal slide grooves through a limiting assembly. The gap between the two L-shaped clamping plates is matched with the gypsum mold, and the L-shaped clamping plate is provided with a clamping assembly for clamping the gypsum mold. A ladle adjustment seat is provided on the ladle adjustment seat, and a ladle is adjustably arranged on the ladle adjustment seat. The central axis of the ladle is arranged at a 90° angle to the central axis of the gate of the gypsum mold.

[0011] Preferably, the output shaft of the continuously variable speed motor is connected to the end of the driving rod extending to the outside of the pouring tank through a coupling.

[0012] Preferably, the limiting assembly includes a slider slidably connected in a horizontal slide groove, the top of the slider is fixedly connected to the L-shaped clamp, and the bottom of the slider is threadedly connected with a fixing bolt, the head of the fixing bolt is tightly attached to the bottom of the casting fixing plate, and the outer diameter of the head of the fixing bolt is larger than the groove width of the horizontal slide groove, and the fixing bolt is used to limit the position of the slider in the horizontal slide groove, and the position of the slider in the horizontal slide groove can be adjusted and fixed by loosening and tightening the fixing bolt.

[0013] Preferably, the clamping assembly includes a plurality of buckles matching the base of the plaster mold, and the buckles are arranged in a rectangular array on two L-shaped clamping plates. The plaster mold and the L-shaped clamping plates are connected by the buckles, which is convenient and quick to operate.

[0014] Preferably, the ladle adjustment base includes a sliding base and a ladle support. Two guide grooves perpendicular to the mold fixing plate are correspondingly arranged on the ladle fixing plate. The sliding base is slidably connected to the guide grooves through guide blocks. A positioning bolt is threadedly connected to the guide block. The head of the positioning bolt abuts against the bottom of the sliding base, and the outer diameter of the head of the positioning bolt is larger than the groove width of the guide groove. The positioning bolt is used to fix the position of the guide block in the guide groove. At the top of both ends of the sliding base, a threaded rod and a guide rod are correspondingly arranged. Threaded holes and guide holes matching the threaded rod and the guide rod are respectively arranged at both ends of the ladle support. The threaded rod is threadedly connected with two adjusting nuts, and the two adjusting nuts respectively abut against the top and bottom of the ladle support. Clamping seats are correspondingly arranged at the top of both ends of the ladle support. Clamping rods are slidably connected to the two clamping seats respectively. Arc-shaped clamping plates matching the ladle are correspondingly arranged at the corresponding ends of the two clamping rods. The ladle is clamped between the two arc-shaped clamping plates. A locking bolt for locking the clamping rod is threadedly connected to the clamping seat. Through the above settings, it is convenient to adjust and position the ladle up and down, left and right, and front and back, so that the pouring nozzle of the ladle is aligned with the pouring gate of the mold.

[0015] Preferably, a plurality of support plates are arranged in parallel on the lower side inside the pouring tank. The support plates are arranged in parallel with the driving rod. A reinforcing rod is fixed on the driving rod. The reinforcing rod is arranged at the bottom of the mold fixing plate. By arranging the support plates, it is convenient to assist in supporting the mold fixing plate and the ladle fixing plate when placing the mold or the ladle into the pouring tank. By arranging the reinforcing rod, the connection strength between the mold fixing plate and the driving rod can be improved.

[0016] Preferably, a vacuum tube, an exhaust pipe and a pressurized air inlet pipe penetrate through the side wall of the pouring tank. A vacuum valve, an exhaust valve and an inlet valve are respectively arranged on the vacuum tube, the exhaust pipe and the pressurized air inlet pipe. One end of the vacuum tube away from the pouring tank is connected to a vacuum pump. One end of the pressurized air inlet pipe away from the pouring tank is connected to a compressor. Specifically, the compressor is an air compressor.

[0017] Preferably, the vacuum valve, the exhaust valve and the inlet valve are all electric valves, and the vacuum valve, the exhaust valve, the inlet valve, the vacuum pump and the compressor are respectively electrically connected to a control cabinet.

[0018] The present utility model further includes other devices, structures or components that can enable it to be used normally, which are all conventional means in the art. In addition, the devices, structures or components not defined in the present utility model, such as buckles, each electric valve, control cabinet, stepless speed change motor, gypsum mold and ladle, etc., all adopt the existing technologies in the art.

[0019] The working principle of the present utility model is as follows. When in use, open the two side tank doors, adjust the mold fixing plate to the horizontal by means of a stepless speed change motor. According to the size of the calcined gypsum mold to be poured and the position of the gate, adjust the gap and position of the two L-shaped clamping plates to match the gypsum mold, and then fix the two L-shaped clamping plates to make the gate position of the gypsum mold reach the fixed position in the center of the pouring tank. Only one adjustment is required for each specification of the mold. Then fix the heat-insulating pouring riser on the gate of the gypsum mold, adjust the ladle support to the horizontal by means of a stepless speed change motor, use an empty ladle to adjust the positions of the two arc-shaped clamping plates and fix them, so that the nozzle of the empty ladle is flush with the inner edge of the gate of the gypsum mold, and the gap is 0 - 5 mm. Then use a special ladle to quantitatively scoop up the molten metal and place it on the two arc-shaped clamping plates, close the two side tank doors, open the vacuum valve to evacuate, and after the vacuum degree reaches the process requirements, select the pouring program with the specified rotational speed and start the stepless speed change motor to start rotating for pouring. After pouring is completed, close the vacuum valve, immediately open the air inlet valve for pressure solidification, and close the air inlet valve after the pressure reaches the process requirements. After the pressure solidification is completed, open the exhaust valve to release the pressure, open the two side tank doors, and take out the gypsum mold and the ladle respectively to prepare for the next operation.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1) Reduce the turbulence of the alloy liquid, ensure smooth filling, and reduce the formation of casting defects such as slag inclusion caused by the turning of the alloy liquid while reducing the intrusion of gas into the alloy liquid under vacuum conditions.

[0022] 2) Reduce the unstable and uncontrollable factors of the manual pouring flow rate, and realize the controllability of the variable flow rate and variable flow of the molten metal pouring.

[0023] 3) Reduce the probability of forming defects such as pores and slag inclusions during the casting pouring process, and improve the qualified rate of the internal quality.

[0024] 4) Facilitate the curing process and greatly improve the yield of batch products.

[0025] 5) For the production of aviation class I products with high internal quality requirements, the quality of the pouring process is controllable, and the casting cost is reduced. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of the present utility model in the embodiment.

[0027] Figure 2 For Figure 1 The enlarged schematic diagram of the structure of part A in

[0028] Figure 3 It is a schematic diagram of the front structure of the present utility model in the embodiment.

[0029] Figure 4 It is a schematic diagram of the back structure of the present utility model in the embodiment.

[0030] Figure 5 Schematic top view structure diagram of the present utility model in the embodiment Specific implementation manners

[0031] The technical solution of the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0032] Embodiment

[0033] As Figures 1 to 5 shown, the following technical solution is proposed in this embodiment: a rotary pouring device for precision investment casting with plaster mold, including a pouring tank 1, an automatic rotation mechanism and a control cabinet 2. Both ends of the pouring tank are hermetically connected with tank doors 3 that can be opened and closed (as Figure 1 shown, the tank door is hinged to the pouring tank through a hinge frame, and a knob for pressing the tank door is provided on the hinge frame). The automatic rotation mechanism includes a mold fixing plate 4, a ladle fixing plate 5 and a stepless speed change motor 6. The mold fixing plate and the ladle fixing plate are arranged perpendicular to each other to form an L-shaped mounting seat. The L-shaped mounting seat is rotatably connected inside the pouring tank through a driving rod 7. The stepless speed change motor and the control cabinet are arranged outside the pouring tank (in this embodiment, the stepless speed change motor and the control cabinet are respectively fixed on the ground through corresponding brackets), and the output shaft of the stepless speed change motor is in transmission connection with the driving rod through a coupling. The control cabinet is electrically connected to the stepless speed change motor. Two groups of horizontal chutes 8 corresponding up and down are arranged on the mold fixing plate. Each group of horizontal chutes is slidably connected with an L-shaped clamping plate 9 through a limiting component. The gap between the two L-shaped clamping plates is matched with the plaster mold 10, and a clamping component for clamping the plaster mold is provided on the L-shaped clamping plate. A ladle adjusting seat is provided on the ladle fixing plate, and a ladle 11 is adjustably arranged on the ladle adjusting seat. The central axis of the ladle is arranged at a 90° angle corresponding to the central axis of the gate 12 of the plaster mold.

[0034] In this embodiment, the limiting component includes a slider 13 slidably connected in the horizontal chute. The top of the slider is fixedly connected with the L-shaped clamping plate, and a fixing bolt (not shown in the figure) is threadedly connected to the bottom of the slider. The head of the fixing bolt is closely attached to the bottom of the mold fixing plate, and the outer diameter of the head of the fixing bolt is greater than the groove width of the horizontal chute. The fixing bolt is used to limit the position of the slider in the horizontal chute. By loosening or tightening the fixing bolt, the position of the slider in the horizontal chute can be adjusted and fixed.

[0035] Specifically, the clamping component includes four buckles (not shown in the figure) that match the base of the plaster mold. The buckles are arranged in a rectangular array on the two L-shaped clamping plates. Connecting the plaster mold and the L-shaped clamping plate through the buckles is convenient and fast in operation.

[0036] More specifically, the ladle adjusting base includes a sliding base 14 and a ladle support 15. Two guiding grooves 16 perpendicular to the mold fixing plate are correspondingly arranged on the ladle fixing plate. The sliding base is slidably connected to the guiding grooves through guiding blocks (not shown in the figure). A positioning bolt (not shown in the figure) is threadedly connected to the guiding block. The head of the positioning bolt abuts against the bottom of the sliding base, and the outer diameter of the head of the positioning bolt is greater than the width of the guiding groove. The positioning bolt is used to fix the position of the guiding block in the guiding groove. At the top of both ends of the sliding base, a threaded rod 17 and a guiding rod 18 are correspondingly arranged. Threaded holes and guiding holes matching the threaded rod and the guiding rod are respectively arranged at both ends of the ladle support. Two adjusting nuts 19 are threadedly connected to the threaded rod. The two adjusting nuts respectively abut against the top and bottom of the ladle support. Clamping seats 20 are correspondingly arranged at the top of both ends of the ladle support. Clamping rods 21 are slidably connected to the two clamping seats respectively. Arc-shaped clamping plates 22 matching the ladle are correspondingly arranged at the corresponding ends of the two clamping rods. The ladle is clamped between the two arc-shaped clamping plates. A locking bolt (not shown in the figure) that can lock the clamping rod is threadedly connected to the clamping seat. Through the above settings, it is convenient to adjust and position the ladle up and down, left and right, and front and back, so as to align the pouring nozzle of the ladle with the pouring gate of the mold.

[0037] In this embodiment, a plurality of support plates 23 are arranged in parallel on the lower side inside the pouring tank. The support plates are arranged in parallel with the driving rod. A reinforcing rod 24 is fixed on the driving rod. The reinforcing rod is arranged at the bottom of the mold fixing plate. By arranging the support plates, it is convenient to assist in supporting the mold fixing plate and the ladle fixing plate when placing the mold or the ladle into the pouring tank. By arranging the reinforcing rod, the connection strength between the mold fixing plate and the driving rod can be improved.

[0038] Specifically, a vacuum pipe 25, an exhaust pipe 26, and a pressurized air inlet pipe 27 penetrate through the side wall of the pouring tank. Vacuum valves (not shown in the figure), exhaust valves (not shown in the figure), and intake valves (not shown in the figure) are respectively arranged on the vacuum pipe, the exhaust pipe, and the pressurized air inlet pipe. One end of the vacuum pipe away from the pouring tank is connected to a vacuum pump (not shown in the figure). One end of the pressurized air inlet pipe away from the pouring tank is connected to an air compressor (not shown in the figure). The vacuum valve, the exhaust valve, and the intake valve are all electric valves, and the vacuum valve, the exhaust valve, the intake valve, the vacuum pump, and the air compressor are respectively electrically connected to the control cabinet.

[0039] The working principle of the utility model is as follows: when in use, open the tank doors on both sides, adjust the mold fixing plate to the horizontal through a stepless speed change motor. According to the size of the calcined gypsum mold to be poured and the position of the gating system, adjust the gap and position of the two L-shaped clamping plates to match the gypsum mold, and then fix the two L-shaped clamping plates to make the gating position of the gypsum mold reach the fixed position at the center of the pouring tank. Only one adjustment is required for each specification of the mold. Then fix the heat-insulating pouring riser on the gating system of the gypsum mold, adjust the ladle support to the horizontal through a stepless speed change motor, use an empty ladle to adjust the positions of the two arc-shaped clamping plates and fix them, so that the pouring nozzle of the empty ladle is flush with the inner edge of the gating system of the gypsum mold, and the gap is 0 - 5 mm. Then use a special ladle to quantitatively scoop up the molten metal and place it on the two arc-shaped clamping plates, close the tank doors on both sides, open the vacuum valve to evacuate, and after the vacuum degree reaches the process requirements, select the pouring program at the specified speed and start the stepless speed change motor to start rotating for pouring. After pouring is completed, close the vacuum valve, immediately open the air inlet valve for pressure solidification, and close the air inlet valve after the pressure reaches the process requirements. After the pressure solidification is completed, open the exhaust valve to release the pressure, open the tank doors on both sides, and take out the gypsum mold and the ladle respectively to prepare for the next operation.

[0040] The above are only the preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.

Claims

1. A rotary pouring device for investment precision casting with plaster mold, comprising a pouring tank, both ends of the pouring tank are hermetically connected with tank doors that can be opened and closed, and it is characterized in that, The cam is an L-shaped mounting plate, and the cam is connected to the casting tank via a driving rod. The cam is connected to the casting tank via a driving rod and the cam is connected to the casting tank via a driving rod. The cam is connected to the casting tank via a driving rod and the cam is connected to the casting tank via a driving rod. The cam is connected to the casting tank via a driving rod and the cam is connected to the casting tank via a driving rod. The cam is connected to the casting tank via a driving rod and the cam is connected to the casting tank via a driving rod. The cam is connected to the casting tank via a driving rod and the cam is connected to the casting tank via a driving rod. The cam is connected to the casting tank via a driving rod and the cam is connected to the casting tank via a driving rod.

2. The rotary pouring device for precision investment casting with plaster mold according to claim 1, characterized in that: The output shaft of the continuously variable speed motor is connected to one end of the driving rod extending to the outside of the pouring tank through a coupling.

3. A rotary pouring device for investment precision casting of plaster molds according to claim 1, characterized in that: The limiting assembly includes a slider slidably connected in a horizontal slide groove, the top of the slider is fixedly connected to the L-shaped clamp plate, and the bottom of the slider is threadedly connected with a fixing bolt, the head of the fixing bolt is tightly attached to the bottom of the casting fixing plate, and the outer diameter of the head of the fixing bolt is larger than the groove width of the horizontal slide groove, and the fixing bolt is used to limit the position of the slider in the horizontal slide groove.

4. A rotary pouring device for investment casting with plaster mold according to claim 1, characterized in that: The clamping assembly includes a plurality of buckles that match the base of the plaster casting, and the buckles are arranged in a rectangular array on two L-shaped clamping plates.

5. A rotary pouring device for investment precision casting with plaster mold according to claim 1, characterized in that: The ladle adjustment seat comprises a sliding base and a ladle support, the ladle fixing plate is correspondingly provided with two guide grooves perpendicular to the casting mold fixing plate, the sliding base is slidably connected with the guide groove through a guide block, a positioning bolt is threadedly connected to the guide block, the head of the positioning bolt is tightly attached to the bottom of the sliding base, and the outer diameter of the head of the positioning bolt is larger than the groove width of the guide groove, the positioning bolt is used to fix the position of the guide block in the guide groove, a threaded rod and a guide rod are correspondingly arranged at the top of both ends of the sliding base, a threaded hole and a guide hole matching the threaded rod and the guide rod are respectively arranged at both ends of the ladle support, the threaded rod is threadedly connected with two adjusting nuts, and the two adjusting nuts are respectively tightly attached to the top and bottom of the ladle support, a clamping seat is correspondingly arranged at the top of both ends of the ladle support, a clamping rod is respectively slidably connected to the two clamping seats, and an arc-shaped clamping plate matching the ladle is correspondingly arranged at one end of the two clamping rods, the ladle is clamped between the two arc-shaped clamping plates, and a locking bolt that can lock the clamping rod is threadedly connected to the clamping seat.

6. The rotary pouring device for investment precision casting with plaster mold according to claim 1, characterized in that: A plurality of support plates are arranged in parallel on the lower inner side of the pouring tank, and the support plates are arranged in parallel with the driving rod. A reinforcing rod is fixed on the driving rod, and the reinforcing rod is arranged at the bottom of the mold fixing plate.

7. A rotary pouring device for investment precision casting with plaster mold according to any one of claims 1 to 6, characterized in that: A vacuum pipe, an exhaust pipe and a pressurized air inlet pipe penetrate through the side wall of the pouring tank. A vacuum valve, an exhaust valve and an air inlet valve are respectively arranged on the vacuum pipe, the exhaust pipe and the pressurized air inlet pipe. One end of the vacuum pipe away from the pouring tank is connected with a vacuum pump, and one end of the pressurized air inlet pipe away from the pouring tank is connected with a compressor.

8. The rotational pouring device for investment precision casting with plaster mold according to claim 7, characterized in that: The vacuum valve, the exhaust valve and the air inlet valve are all electric valves, and the vacuum valve, the exhaust valve, the air inlet valve, the vacuum pump and the compressor are respectively electrically connected with a control cabinet.

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