A demoulding device and demoulding method for large screw rods lined with rubber

Abstract

The invention discloses a demoulding device and a demoulding method for a large screw lined with rubber, belonging to the technical field of demoulding for large screw lined with rubber; a left correcting device and a right correcting device realize the regular swing of the screw shaft, and the swinging rubber-lined screw to be demoulded will rotate and tilt, so as to solve the problem of difficult demoulding in this way and ensure the quality of the product after demoulding; the left correcting device and the right correcting device realize the purpose of evenly applying pressure for demoulding, and the left supporting device supports the left end of the secondary ejector shaft, and the right supporting device supports the main ejector shaft, so that the secondary ejector shaft and the main ejector shaft can rotate and move normally and avoid excessive tilting; the function of the main ejector shaft is to push the screw shaft in the large screw mold to the left side, and the function of the secondary ejector shaft is to support the screw shaft in the large screw mold after it comes out from the left side of the large screw mold, so as to avoid the left end of the rubber-lined screw from being worn, squeezed and deformed when it comes out of the mold.

Description

Technical Field

[0001] The invention belongs to the technical field of demoulding after a large screw is lined with rubber, and in particular relates to a demoulding device and a demoulding method for a large screw lined with rubber. Background Art

[0002] The twin-screw pump is a positive displacement pump, which is composed of a pair of left and right screws with different rotation directions and the inner wall of the sealing bushing. During the rotation of the screw, a sealing cavity is gradually established, and as the screw rotates, the sealing cavity continuously moves axially from the suction end of the pump to the discharge end, and the medium sealed in the sealing cavity is continuously discharged. The screw pump has many advantages such as stable medium delivery, low turbulence of the medium, weak pressure pulsation, small mechanical vibration, and low noise. The manufacture of the rubber-lined screw is to put the metal skeleton into the rubber-lined molding mold, and then inject the vulcanized rubber into the rubber-lined molding mold, and form the rubber-lined screw after finalization.

[0003] Generally speaking, rubber-lined screws can be demolded smoothly by ordinary demolding equipment after molding. However, it is difficult to demold a larger rubber-lined screw from the mold. For example, the outer diameter of the screw is up to about 490mm, and the mold diameter is about 800mm. For large rubber-lined screws, there is a large friction between the outer surface of the rubber lining and the molding cavity of the mold. If the screw is forced to be demolded from the mold, the rubber lining will be damaged, resulting in unqualified products. Summary of the invention

[0004] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a demoulding device and a demoulding method for a large screw lined with rubber.

[0005] The above technical problems of the present invention are mainly solved by the following technical solutions: a demoulding device after rubber lining of a large screw, comprising a frame bottom plate and a frame top plate, the frame bottom plate and the frame top plate are both arranged horizontally, and side support beams are vertically arranged at the four corners of the frame bottom plate, the frame top plate is arranged on the top of the four side support beams, a front support beam is fixedly connected between the inner sides of the middle parts of the two side support beams located on the front side, and a rear support beam is fixedly connected between the inner sides of the middle parts of the two side support beams located on the rear side, the front support beam and the rear support beam are arranged at the same horizontal height, a tooling table is arranged on the upper left side of the middle part of the frame bottom plate, a demoulding clamp is arranged on the upper side of the middle part of the tooling table, and the frame bottom A motor mounting platform is provided on the upper surface of the right end of the plate, a demoulding motor is provided on the upper surface of the right end of the motor mounting platform, a mobile trolley is provided on the upper side between the front support beam and the rear support beam, and mobile wheels are provided on the front and rear sides of the bottom of the mobile trolley, the mobile wheels on the front side of the mobile trolley are provided on the upper surface of the front support beam, and the mobile wheels on the rear side of the mobile trolley are provided on the upper surface of the rear support beam, a first hydraulic cylinder is provided on the upper surface of the middle part of the mobile trolley, the telescopic rod of the first hydraulic cylinder extends to the lower part between the front support beam and the rear support beam, a top pressure plate is provided horizontally on the lower end of the telescopic rod of the first hydraulic cylinder, and V-shaped reinforcing ribs are fixedly provided on the beam bodies of the frame bottom plate, the frame top plate, the side support beam, the front support beam and the rear support beam;

[0006] The demoulding clamp comprises a bottom mold clamp and a top mold clamp, the inner sides of the bottom mold clamp and the top mold clamp are mold clamping cavities, the mold clamping cavities are used for positioning and clamping, the lower side of the bottom mold clamp is fixed to the middle of the tooling table, and the upper surface of the top mold clamp is connected to the top pressure plate;

[0007] A planetary reducer is provided on the upper surface of the left end of the motor mounting platform, and the input end of the planetary reducer is connected to the output shaft of the demolding motor. A third hydraulic cylinder is provided in the left end of the motor mounting platform, and a fourth hydraulic cylinder is provided above the planetary reducer. The fourth hydraulic cylinder is fixed below the front support beam and the rear support beam through a connecting frame.

[0008] Preferably, a hydraulic cylinder mounting platform is fixedly provided on the right end portion between the front support beam and the rear support beam, a second hydraulic cylinder is fixedly provided on the upper side of the hydraulic cylinder mounting platform, support rods are vertically provided upward at the four corners of the mobile crane, a reinforcing beam is connected between the upper ends of the four support rods, equal gaps are left between the upper end surfaces of the four support rods and the lower surface of the frame top plate, and the left end portion of the telescopic rod of the second hydraulic cylinder is slidably connected to the support rod on the right side of the mobile crane.

[0009] Preferably, a main top shaft, a universal joint and a transmission rod are arranged between the demolding clamp and the planetary reducer from left to right in sequence, the main top shaft, the universal joint and the transmission rod are horizontally coaxially arranged, the main top shaft and the transmission rod are connected through a universal joint, a square groove is opened in the center of the left end face of the main top shaft, a pin hole is arranged on the bottom side of the square groove and penetrates the main top shaft, a soft metal cover is sleeved on the end face of the left end of the main top shaft, an opening is opened in the middle of the soft metal cover, and the opening corresponds to the size and position of the square groove, a sliding hole is opened at the axis center of one end of the transmission rod away from the main top shaft, a sliding shaft is slidably connected in the sliding hole, a flat key pin is fixedly provided on the shaft rod of the sliding shaft, a pin groove is opened on the inner wall of the sliding hole, the outer side of the flat key pin is slidably arranged in the pin groove, and the end of the sliding shaft away from the transmission rod is connected to the output end of the planetary reducer.

[0010] Preferably, both sides of the middle part of the transmission rod are sleeved with stabilizing sleeves, and the two stabilizing sleeves are slidably arranged on the transmission rod. A fixing ring is fixedly sleeved on the right end of the transmission rod, and a movable ring is movably sleeved on the right side of the fixing ring and on the transmission rod. Push rods are fixedly connected on the upper and lower sides of the movable ring. The lower end of the push rod located on the lower side of the movable ring is connected to the telescopic push rod of the third hydraulic cylinder, and the upper end of the push rod located on the upper side of the movable ring is connected to the telescopic push rod of the fourth hydraulic cylinder. Connecting rods are vertically fixed on the upper sides of the two fixing rings, and a reinforcing rod is provided between the two connecting rods.

[0011] A top plate is fixedly provided on the lower side between the middle part of the front support beam and the middle part of the rear support beam, a sliding bar is horizontally provided on the lower side of the top plate, two ends of the sliding bar are respectively fixed to the lower sides of the left and right ends of the top plate, a sliding plate is provided on the right end of the sliding bar, and the sliding plate is slidably arranged on the sliding bar, and the upper surface of the sliding plate is slidably connected with the lower surface of the top plate, a sliding cylinder is provided on the left side of the sliding plate and in the middle of the sliding rod, and the sliding cylinder is slidably arranged on the sliding bar, a supporting spring is sleeved on the sliding bar between the sliding cylinder and the sliding plate, the left end of the supporting spring is fixed to the right end of the sliding cylinder, and the right end of the supporting spring is fixed to the left end of the sliding plate, the upper ends of the two connecting rods are fixed to the lower surface of the sliding plate, and a horizontal top rod is fixedly connected to the left side of the upper end portion of the connecting rod on the left side.

[0012] Preferably, a secondary top shaft is horizontally arranged on the left side of the demoulding clamp, the secondary top shaft is horizontally coaxially arranged with the main top shaft, the right end of the secondary top shaft has the same structure as the left end of the main top shaft, a left correcting device is arranged on the right end of the secondary top shaft, a right correcting device is arranged on the left end of the main top shaft, the left correcting device and the right correcting device have the same structure, a left supporting device is arranged on the left end of the secondary top shaft, and a right supporting device is arranged on the right end of the main top shaft;

[0013] The right correction device comprises a circular ring body and an inner positioning ring, a plurality of correction hydraulic cylinders are evenly embedded on the inner ring surface of the circular ring body, the outer ring surface of the inner positioning ring is fixedly connected to the inner ring surface of the circular ring body by a plurality of connecting pieces, the telescopic rods of the plurality of correction hydraulic cylinders are all slidably penetrated through the inner side of the inner positioning ring, and an arc-shaped support plate is provided on the inner side of the inner positioning ring and at the end of the telescopic rod of the correction hydraulic cylinder;

[0014] A stabilizing frame is provided on the left side of the left supporting device, the bottom of the stabilizing frame is slidably connected to the upper surface of the workbench, a stabilizing frame slide is provided above the stabilizing frame, the stabilizing frame slide is fixed to the lower side between the front support beam and the rear support beam, the upper end of the stabilizing frame is slidably connected to the lower surface of the stabilizing frame slide, the right side of the upper end of the stabilizing frame is fixedly connected with a suspension, and the left end face of the secondary top shaft movably presses against the right side face of the stabilizing frame;

[0015] Four fixing columns are connected to the outer ring surface of the circular ring body of the right correction device, the outer ends of two of the four fixing columns are respectively fixed to the lower sides of the front support beam and the rear support beam, and the remaining two of the four fixing columns are respectively fixed to the front and rear sides of the frame bottom plate;

[0016] The lower end of the circular ring body of the left correction device is slidably connected to the upper surface of the workbench, and the upper end of the circular ring body of the left correction device is fixedly connected to the lower surface of the suspension;

[0017] The left supporting device comprises a supporting ring and an elastic supporting member, the number of the elastic supporting members is three, the elastic supporting member comprises a piston sleeve, a piston rod and an arc-shaped movable plate, the piston rod is slidably arranged in the piston sleeve, the arc-shaped movable plate is fixed on the outer end of the piston rod, a pressure spring is sleeved on the piston rod, a plurality of rollers are rotatably arranged on the concave arc surface of the arc-shaped movable plate, the piston sleeves of the three elastic supporting members are evenly distributed and annularly fixed on the inner ring surface of the supporting ring, the left supporting device has the same structure as the right supporting device, the lower end of the supporting ring of the left supporting device is slidably connected to the upper surface of the workbench, the upper end of the supporting ring of the left supporting device is fixedly connected to the lower surface of the suspension, the upper end of the supporting ring of the right supporting device is fixedly connected to the slide cylinder with a fixing rod, and the lower end of the supporting ring of the right supporting device is slidably connected to the upper surface of the workbench through a sliding member.

[0018] Preferably, an oil guide groove is provided on the concave arc surface of the arc-shaped support plate, the oil guide groove is arranged in a serpentine shape, a plurality of oil guide holes are provided on the inner side of the oil guide groove, an oil guide pipe is connected to the arc-shaped support plate, and the oil guide pipes are connected to the plurality of oil guide holes.

[0019] Preferably, the number of the correcting hydraulic cylinders is eight, and the eight correcting hydraulic cylinders are numbered A, B, C, D, E, F, G, and H, respectively, wherein the A-correcting hydraulic cylinder is arranged opposite to the E-correcting hydraulic cylinder, the B-correcting hydraulic cylinder is arranged opposite to the F-correcting hydraulic cylinder, the C-correcting hydraulic cylinder is arranged opposite to the G-correcting hydraulic cylinder, and the D-correcting hydraulic cylinder is arranged opposite to the H-correcting hydraulic cylinder.

[0020] A demoulding method for a demoulding device after a large screw is lined with rubber, characterized in that the demoulding method is:

[0021] In the first step of the preparation stage, the existing large screw mold to be demoulded is placed horizontally on the bottom mold clamp, the second hydraulic cylinder controls the mobile crane to move to the top of the bottom mold clamp, and controls the first hydraulic cylinder to push the top mold clamp downward to apply pressure. While applying pressure downward, the first hydraulic cylinder will lift the mobile crane upward due to the pressure. After lifting, the tops of the four support rods will be supported on the lower surface of the frame top plate, so that the first hydraulic cylinder can firmly push the top mold clamp to fix the large screw mold. After the large screw mold is fixed, the left end of the main top shaft is fixedly connected to the screw shaft in the large screw mold, and the right end of the auxiliary top shaft is fixedly connected to the screw shaft in the large screw mold. The telescopic rods of the third hydraulic cylinder and the fourth hydraulic cylinder are retracted, so that the two push rods drive the movable ring to move to the rightmost position, and the transmission rod is also located at the rightmost end of the sliding shaft. The right support device is located at the right end of the main top shaft;

[0022] In the second step, during the demoulding stage, the demoulding motor is started to rotate, and the demoulding motor drives the planetary reducer. The final output speed of the planetary reducer is rpm. The planetary reducer drives the sliding shaft to rotate. While the sliding shaft rotates, the third hydraulic cylinder and the fourth hydraulic cylinder synchronously push the movable ring, and the movable ring pushes the fixed ring. The stable sliding sleeve moves synchronously, and the transmission rod moves synchronously to the left while rotating. At this time, the universal joint, the main top shaft, the screw shaft and the auxiliary top shaft in the large screw mold move and rotate synchronously. Demolding begins, and the fixed ring is slowly pushed to the left by the third hydraulic cylinder and the fourth hydraulic cylinder. The transmission rod moves and rotates to the left against the universal joint and the main top shaft and drives the screw shaft in the large screw mold. At this time, the left correction device and the right correction device start to run synchronously. The A-correction hydraulic cylinder of the left correction device starts to push the arc support plate toward the main top shaft. At the same time, the right correction device The E-correction hydraulic cylinder starts to push the arc support plate toward the direction of the secondary top shaft, and then the B-correction hydraulic cylinder of the left correcting device runs, and the F-correction hydraulic cylinder of the right correcting device runs, and the C-correction hydraulic cylinder of the left correcting device runs, and the G-correction hydraulic cylinder of the right correcting device runs, and the D-correction hydraulic cylinder of the left correcting device runs, and the H-correction hydraulic cylinder of the right correcting device runs. The corrective hydraulic cylinders on the left and right correcting devices run in opposite directions to make the screw shaft in the large screw mold tilt like a tilting rod, which helps demoulding. When the left and right correcting devices are running, the left supporting device and the right supporting device respectively play a role in stabilizing the support of the main top shaft and the secondary top shaft. Through the continuous feeding of the demoulding motor, the third hydraulic cylinder and the fourth hydraulic cylinder, the screw shaft in the large screw mold is demoulded from the large screw mold to the left side.

[0023] A large screw mold 61 and a rubber-lined screw 62 are used for demoulding of the present invention. The screw is placed in the large screw mold 61, and plastic is injected into the mold through an existing die-casting machine. Since the inner cavity of the mold is a spiral molding cavity, the plastic is fixed on the screw after being molded and cooled to form a rubber-lined screw 62. After formation, it needs to be demoulded. Due to the huge friction between the plastic and the inner cavity of the mold when the large rubber-lined screw is demoulded, demoulding is difficult and the plastic outside the screw is easily damaged.

[0024] The present invention has the beneficial effects:

[0025] 1. The left and right correcting devices are used to realize the regular swing of the screw shaft. The swinging rubber-lined screw to be demolded will rotate and tilt. This method can solve the problem of difficult demolding and ensure the quality of the product after demolding. The left and right correcting devices can achieve the purpose of evenly applying pressure to demold, while the left supporting device supports the left end of the auxiliary ejector shaft, and the right supporting device supports the main ejector shaft, so that the auxiliary ejector shaft and the main ejector shaft can rotate and move normally to avoid excessive tilting;

[0026] 2. The function of the main ejector shaft is to push the screw shaft in the large screw mold to the left, while the function of the auxiliary ejector shaft is to support the screw shaft in the large screw mold after it comes out from the left side of the large screw mold, so as to prevent the left end of the rubber-lined screw from being worn, squeezed and deformed when it comes out of the mold;

[0027] 3. The transmission rod is driven by the sliding shaft to achieve the effect of both rotation and movement feeding. The push rod can push the right supporting device. After the main top shaft moves to the left, the push rod pushes the right supporting device to move to the left synchronously, so that the right supporting device is always supported on the shaft body of the main top shaft;

[0028] 4. The pressure spring applies pressure to the arc-shaped movable plate to support it toward the center of the supporting ring. The piston sleeve, piston rod, arc-shaped movable plate and pressure spring are arranged in coordination to achieve the effect of elastically supporting the right end of the main top shaft and the left end of the auxiliary top shaft. The roller enables the main top shaft and the auxiliary top shaft to maintain the effect of rotation.

[0029] 5. The outer end of the oil guide pipe is connected to the existing oil supply pump, and the lubricating oil is transported to the oil guide hole through the oil guide pipe. The lubricating oil fills the oil guide groove to achieve the lubrication between the inner concave surface of the arc support plate and the shaft body;

[0030] 6. The soft metal cover is made of copper. The soft metal cover serves as a buffer to protect the left end face of the main top shaft and extend the service life of the left end face of the main top shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a front view structural schematic diagram of the present invention;

[0032] Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure in the A direction;

[0033] Figure 3 It is a side view structural schematic diagram of the left end of the main top shaft of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the left end surface of the main top shaft of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the connection between the transmission rod and the sliding shaft of the present invention;

[0036] Figure 6 It is a structural schematic diagram of the connection of the slide bar, slide plate and slide cylinder of the present invention;

[0037] Figure 7 It is a side view structural schematic diagram of the right end of the auxiliary top shaft of the present invention;

[0038] Figure 8It is a structural schematic diagram of the right correction device of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of the inner end surface of the arc-shaped support plate of the present invention;

[0040] Fig.10 It is a side view structural schematic diagram of the arc-shaped support plate of the present invention;

[0041] Fig.11 It is a structural schematic diagram of the right supporting device of the present invention;

[0042] Fig.12 It is a structural schematic diagram of existing large screw molds and rubber-lined screws.

[0043] In the figure: 1, frame bottom plate; 2, frame top plate; 3, side support beam; 4, front support beam; 5, rear support beam; 6, tooling table; 7, demoulding clamp; 701, bottom mold clamp; 702, top mold clamp; 8, motor mounting table; 801, planetary reducer; 802, third hydraulic cylinder; 803, fourth hydraulic cylinder; 9, demoulding motor; 10, mobile crane; 11, first hydraulic cylinder; 12, top pressure plate; 13, V-shaped reinforcement rib; 14, hydraulic cylinder mounting table; 15, second hydraulic cylinder; 16, support rod; 19, main top shaft; 20, transmission rod 20; 21, universal joint; 22, square groove; 23, pin hole; 24, soft metal cover; 25, sliding hole; 26, sliding shaft; 27, flat key pin; 28, pin groove; 29, stabilizing sleeve; 30, fixed ring; 31, movable ring; 32, push rod; 33. Connecting rod; 34. Reinforcing rod; 35. Top plate; 36. Sliding rod; 37. Slide plate; 38. Slide cylinder; 39. Support spring; 40. Top rod; 41. Secondary top shaft; 42. Left correcting device; 43. Right correcting device; 44. Left supporting device; 45. Right supporting device; 46. Ring body; 47. Inner positioning ring; 48. Correction hydraulic cylinder; 49. Arc support plate; 50. Stabilizing frame; 501. Stabilizing frame slide plate; 502. Suspension; 51. Fixed column; 52. Supporting ring; 521. Fixed rod; 53. Piston sleeve; 54. Piston rod; 55. Arc movable plate; 56. Pressure spring; 57. Roller; 58. Oil guide groove; 59. Oil guide hole; 60. Oil guide pipe; 61. Large screw mold; 62. Rubber-lined screw; 63. Bump; 64. Inner pin hole. DETAILED DESCRIPTION

[0044] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0045] Embodiment: A demoulding device and demoulding method for a large screw lined with rubber, such as Figure 1-Figure 12As shown, it includes a frame bottom plate 1 and a frame top plate 2, the frame bottom plate 1 and the frame top plate 2 are both arranged horizontally, and side support beams 3 are vertically upwardly arranged at the four corners of the frame bottom plate 1, the frame top plate 2 is arranged on the top of the four side support beams 3, a front support beam 4 is fixedly connected between the inner sides of the middle parts of the two side support beams 3 located on the front side, and a rear support beam 5 is fixedly connected between the inner sides of the middle parts of the two side support beams 3 located on the rear side, the front support beam 4 and the rear support beam 5 are arranged at the same horizontal height, a tooling table 6 is provided on the upper left side of the middle part of the frame bottom plate 1, a demoulding clamp 7 is provided on the upper side of the middle part of the tooling table 6, a motor mounting table 8 is provided on the upper surface of the right end part of the frame bottom plate 1, a demoulding motor 9 is provided on the upper surface of the right end part of the motor mounting table 8, and a movable A trolley 10, wherein the front and rear sides of the bottom of the mobile trolley 10 are provided with moving wheels, the moving wheels on the front side of the mobile trolley 10 are provided on the upper surface of the front support beam 4, and the moving wheels on the rear side of the mobile trolley 10 are provided on the upper surface of the rear support beam 5. A first hydraulic cylinder 11 is provided on the upper surface of the middle part of the mobile trolley 10, and the telescopic rod of the first hydraulic cylinder 11 extends to the lower part between the front support beam 4 and the rear support beam 5. A top pressure plate 12 is horizontally provided at the lower end of the telescopic rod of the first hydraulic cylinder 11, and the first hydraulic cylinder 11 can lift the top mold clamp 702 upwards. V-shaped reinforcing ribs 13 are fixedly provided on the beam bodies of the frame bottom plate 1, the frame top plate 2, the side support beam 3, the front support beam 4 and the rear support beam 5, and the V-shaped reinforcing ribs 13 serve to enhance the overall strength of the frame bottom plate 1, the frame top plate 2, the side support beam 3, the front support beam 4 and the rear support beam 5;

[0046] The demoulding clamp 7 includes a bottom mold clamp 701 and a top mold clamp 702. The inner sides of the bottom mold clamp 701 and the top mold clamp 702 are mold clamp cavities. The mold clamp cavity formed between the bottom mold clamp 701 and the top mold clamp 702 is hexagonal. The mold clamp cavity is used to position and clamp a large screw mold. The lower side of the bottom mold clamp 701 is fixed to the middle of the tooling table 6. The upper surface of the top mold clamp 702 is connected to the top pressure plate 12.

[0047] A planetary reducer 801 is provided on the upper surface of the left end of the motor mounting platform 8, and the planetary reducer 801 is used to reduce the number of revolutions output by the demoulding motor to avoid the demoulding being affected by excessively high revolutions. The input end of the planetary reducer 801 is connected to the output shaft of the demoulding motor 9. A third hydraulic cylinder 802 is provided in the left end of the motor mounting platform 8, and a fourth hydraulic cylinder 803 is provided above the planetary reducer 801. The fourth hydraulic cylinder 803 is fixed to the lower part between the front support beam 4 and the rear support beam 5 through a connecting frame.

[0048] A hydraulic cylinder mounting platform 14 is fixedly provided on the right end portion between the front support beam 4 and the rear support beam 5, and a second hydraulic cylinder 15 is fixedly provided on the upper side of the hydraulic cylinder mounting platform 14. Support rods 16 are vertically provided upward at the four corners of the mobile trolley 10, and a reinforcing beam is connected between the upper ends of the four support rods 16. An equal gap is left between the upper end surfaces of the four support rods 16 and the lower surface of the frame top plate 2, so that the mobile trolley 10 can move. The left end portion of the telescopic rod of the second hydraulic cylinder 15 is slidably connected to the support rod 16 on the right side of the mobile trolley 10, and the mobile trolley 10 can be adjusted and moved left and right through the telescopic movement of the second hydraulic cylinder 15;

[0049] A main top shaft 19, a universal joint 21 and a transmission rod 20 are arranged in sequence from left to right between the demoulding clamp 7 and the planetary reducer 801. The main top shaft 19, the universal joint 21 and the transmission rod 20 are arranged horizontally coaxially. The main top shaft 19 and the transmission rod 20 are connected by the universal joint 21. Since the main top shaft 19 will stir during demoulding, the transmission rod 20 is kept stable by the arrangement of the universal joint 21. A square groove 22 is opened in the center of the left end face of the main top shaft 19. A pin hole 23 is penetrated on the bottom side of the square groove 22 and on the main top shaft 19. A soft metal cover 24 is sleeved on the end face of the left end of the main top shaft 19. The soft metal cover 24 is made of copper. The soft metal cover 24 serves the purpose of buffering, protecting the left end face of the main top shaft 19, and improving the service life of the left end face of the main top shaft 19. An opening is opened in the middle of the soft metal cover 24, and the opening is The size and position of the square groove 22 correspond. A sliding hole 25 is provided at the axis center of one end of the transmission rod 20 away from the main top shaft 19. A sliding shaft 26 is slidably connected in the sliding hole 25. A flat key pin 27 is fixed on the shaft of the sliding shaft 26. A pin groove 28 is provided on the inner wall of the sliding hole 25. The outer side of the flat key pin 27 is slidably provided in the pin groove 28. The end of the sliding shaft 26 away from the transmission rod 20 is connected to the output end of the planetary reducer 801. By providing temporary protrusions 63 at both ends of the existing rubber-lined screw 61, the temporary protrusion 63 can be removed by mechanical processing after the rubber-lined screw 61 is demolded, and an inner pin hole 64 is provided on the protrusion 63. The protrusion 63 is inserted into the square groove 22, so that the main top shaft 19 can drive the rubber-lined screw 61 to rotate, and the pins are inserted into the pin hole 23 and the inner pin hole 64 to achieve a stable connection effect without falling off.

[0050] Both sides of the middle part of the transmission rod 20 are sleeved with stabilizing sleeves 29, and the two stabilizing sleeves 29 are slidably arranged on the transmission rod 20. A fixing ring 30 is fixedly sleeved on the right end of the transmission rod 20, and a movable ring 31 is movably sleeved on the right side of the fixing ring 30 and on the transmission rod 20. Push rods 32 are fixedly connected to the upper and lower sides of the movable ring 31. The lower end of the push rod 31 located on the lower side of the movable ring 31 is connected to the telescopic push rod of the third hydraulic cylinder 802, and the upper end of the push rod 31 located on the upper side of the movable ring 31 is connected to the telescopic push rod of the fourth hydraulic cylinder 803. A connecting rod 33 is vertically fixed on the upper sides of the two fixing rings 30, and a reinforcing rod 34 is arranged between the two connecting rods. The two stabilizing sleeves 29 can make the transmission rod 20 move stably, and the fixing ring 30 is pushed by the movable ring 31, so that the transmission rod 20 can move to the left.

[0051] A top plate 35 is fixedly provided on the lower side between the middle part of the front supporting beam 4 and the middle part of the rear supporting beam 5, a sliding rod 36 is horizontally provided on the lower side of the top plate 35, two ends of the sliding rod 36 are respectively fixed to the lower sides of the left and right ends of the top plate 35, a sliding plate 37 is provided on the right end of the sliding rod 36, the sliding plate 37 is slidably provided on the sliding rod 36, the upper surface of the sliding plate 37 and the lower surface of the top plate 35 are slidably connected, a sliding cylinder 38 is provided on the left side of the sliding cylinder 37 and in the middle part of the sliding rod 36, the sliding cylinder 38 is slidably provided on the sliding rod 36, a supporting spring 39 is sleeved on the sliding rod 36 between the sliding cylinder 38 and the sliding plate 37, the left end of the supporting spring 39 is fixed to the right end of the sliding cylinder 38, and the right end of the supporting spring 39 is fixed to the left end of the sliding cylinder 38. The end is fixed to the left end of the slide plate 37, the upper ends of the two connecting rods 33 are fixed to the lower surface of the slide plate 37, and the left horizontal fixed connection of the upper end of the connecting rod 33 on the left side is provided with a transverse push rod 40. When the movable ring 31 pushes the fixed ring 30 to enable the transmission rod 20 to move to the left, the two stabilizing sleeves 29 follow and move to the left at the same time, so the connecting rod 33 drives the slide plate 37 to move to the left. Since the slide plate 37 moves to the left during demolding, it needs to be reset after the demolding is completed. By resetting the transmission rod 20, the stabilizing sleeve 29, and the transmission rod 20 to the original starting point, the support spring 39 pulls the slide cylinder 38 to the right while resetting, so that the slide cylinder 38 drives the right supporting device 45 to reset and plays an auxiliary pulling role.

[0052] A secondary top shaft 41 is horizontally arranged on the left side of the demoulding clamp 7, and the secondary top shaft 41 is horizontally coaxially arranged with the main top shaft 19. The function of the main top shaft 19 is to push the screw shaft in the large screw mold to the left, and the function of the secondary top shaft 41 is to support the screw shaft in the large screw mold after it comes out from the left side of the large screw mold, so as to prevent the left end of the rubber-lined screw 61 from being worn, squeezed and deformed when it comes out of the mold. The right end of the secondary top shaft 41 has the same structure as the left end of the main top shaft 19. A left correcting device 42 is arranged on the right end of the secondary top shaft 41, and a right correcting device 43 is arranged on the left end of the main top shaft 19. The left correcting device 42 and the right correcting device 43 have the same structure. A left supporting device 44 is provided on the left end of the secondary top shaft 41, and a right supporting device 45 is provided on the right end of the main top shaft 19. Since the main top shaft 19 slowly rotates and moves to the left, the screw shaft in the large screw mold needs to pass through the left correcting device 42 and the right correcting device 43 to achieve the regular swing of the screw shaft, so as to achieve the purpose of evenly applying pressure to demould. The left supporting device 44 supports the left end of the secondary top shaft 41, and the right supporting device 45 supports the main top shaft 19, so that the secondary top shaft 41 and the main top shaft 19 can rotate and move normally to avoid excessive tilting.

[0053] The right correcting device 43 includes a circular ring body 46 and an inner positioning ring 47. A number of correcting hydraulic cylinders 48 are evenly embedded on the inner ring surface of the circular ring body 46. The number of correcting hydraulic cylinders 48 are connected and controlled by an existing hydraulic station. The outer ring surface of the inner positioning ring 47 is fixedly connected to the inner ring surface of the circular ring body 46 by a number of connecting pieces. The telescopic rods of the number of correcting hydraulic cylinders 48 are slidably penetrated through the inner side of the inner positioning ring 47. An arc-shaped support plate 49 is provided on the inner side of the inner positioning ring 47 and at the end of the telescopic rod of the correcting hydraulic cylinder 48. The inner positioning ring 47 stabilizes the telescopic rods of the number of correcting hydraulic cylinders 48 after they are extended. The arc-shaped design of the arc-shaped support plate 49 can slide and fit the shaft surface to provide better support and contact. Through the number of correcting hydraulic cylinders 48, pressure is applied to the main top shaft 19 and the secondary top shaft 41 in different directions, so that they swing regularly with a small amplitude, thereby improving the demoulding effect.

[0054] A stabilizing frame 50 is provided on the left side of the left supporting device 44, and the bottom of the stabilizing frame 50 is slidably connected to the upper surface of the workbench 6. A stabilizing frame slide plate 501 is provided above the stabilizing frame 50, and the stabilizing frame slide plate 501 is fixed to the lower side between the front support beam 4 and the rear support beam 5. The upper end of the stabilizing frame 50 is slidably connected to the lower surface of the stabilizing frame slide plate 501. The right side of the upper end of the stabilizing frame 50 is fixedly connected with a suspension 502. The left end surface of the secondary top shaft 41 movably presses against the stabilizing frame 50. On the right side, the lower end of the circular ring body 46 of the left correcting device 42 is slidably connected to the upper surface of the workbench 6, and the upper end of the circular ring body 46 of the left correcting device 42 is fixedly connected to the lower surface of the suspension 502. When the secondary top shaft 41 moves to the left, its left end pushes the stabilizing frame 50 to move to the left, and pulls the left correcting device 42 and the left supporting device 44 through the suspension 502, so that the left correcting device 42 and the left supporting device 44 always remain in the original position on the secondary top shaft 41, so as to achieve the effect of stabilizing the secondary top shaft 41;

[0055] Four fixing columns 51 are connected to the outer ring surface of the annular body 46 of the right correction device 43. The outer ends of two of the four fixing columns 51 are respectively fixed to the lower sides of the front support beam 4 and the rear support beam 5. The remaining two of the four fixing columns 51 are respectively fixed to the front and rear sides of the frame bottom plate 1. The right correction device 43 is kept fixed by the four fixing columns 51.

[0056] The left support device 44 includes a support ring 52 and an elastic support member, the number of the elastic support members is three, and the elastic support member includes a piston sleeve 53, a piston rod 54 and an arc-shaped movable plate 55. The piston rod 54 is slidably arranged in the piston sleeve 53, and the arc-shaped movable plate 55 is fixed on the outer end of the piston rod 54. A pressure spring 56 is sleeved on the piston rod 54, and a plurality of rollers 57 are rotatably arranged on the concave arc surface of the arc-shaped movable plate 55. The piston sleeves 53 of the three elastic support members are evenly distributed in an annular shape and fixed on the inner ring surface of the support ring 52. The left support device 44 has the same structure as the right support device 45. The lower end of the support ring 52 of the left support device 44 is slidably connected to the workbench 6, the upper end of the support ring 52 of the left support device 44 is fixedly connected to the lower surface of the suspension 502, and a fixing rod 521 is fixedly connected between the upper end of the support ring 52 of the right support device 45 and the slide cylinder 38, and the lower end of the support ring 52 of the right support device 45 is slidably connected to the upper surface of the workbench 6 through a sliding member, and the pressure spring 56 applies pressure to the arc-shaped movable plate 55 to support it toward the center of the support ring 52. Through the coordinated arrangement of the piston sleeve 53, the piston rod 54, the arc-shaped movable plate 55 and the pressure spring 56, the effect of elastically supporting the right end of the main top shaft 19 and the left end of the auxiliary top shaft 41 is achieved, and the roller 57 enables the main top shaft 19 and the auxiliary top shaft 41 to keep rotating.

[0057] An oil guide groove 58 is provided on the concave arc surface of the arc-shaped support plate 49, and the oil guide groove 58 is serpentine-shaped. A plurality of oil guide holes 59 are provided on the inner side of the oil guide groove 58. An oil guide pipe 60 is connected to the arc-shaped support plate 49, and the oil guide pipes 60 are connected to the plurality of oil guide holes 59. The outer end of the oil guide pipe 60 is connected to the existing oil supply pump, and the lubricating oil is transported to the oil guide holes 59 through the oil guide pipe 60. The lubricating oil fills the oil guide groove 58, thereby achieving the lubrication effect between the concave arc surface of the arc-shaped support plate 49 and the shaft body.

[0058] There are eight correcting hydraulic cylinders 48, and the eight correcting hydraulic cylinders 48 are numbered A, B, C, D, E, F, G, and H, respectively. Among them, the A-correcting hydraulic cylinder 48 is arranged opposite to the E-correcting hydraulic cylinder 48, the B-correcting hydraulic cylinder 48 is arranged opposite to the F-correcting hydraulic cylinder 48, the C-correcting hydraulic cylinder 48 is arranged opposite to the G-correcting hydraulic cylinder 48, and the D-correcting hydraulic cylinder 48 is arranged opposite to the H-correcting hydraulic cylinder 48. Through the coordinated work of the eight correcting hydraulic cylinders 48, the main top shaft 19 and the secondary top shaft 41 can be evenly tilted.

[0059] A demoulding method for a demoulding device after a large screw is lined with rubber,

[0060] The demoulding method is:

[0061] In the first step of the preparation stage, the existing large screw mold to be demoulded is placed horizontally on the bottom mold clamp 701, and the second hydraulic cylinder 15 controls the mobile crane 10 to move to the top of the bottom mold clamp 701, and controls the first hydraulic cylinder 11 to push the top mold clamp 702 downward to apply pressure. While applying pressure downward, the first hydraulic cylinder 11 will push the mobile crane 10 upward due to the pressure. After the lifting, the top of the four support rods 16 will be supported on the lower surface of the frame top plate 2, so that the first hydraulic cylinder 11 can firmly push the top mold clamp 702 02, fix the large screw mold. After the large screw mold is fixed, the left end of the main top shaft 19 is fixedly connected to the screw shaft in the large screw mold, and the right end of the auxiliary top shaft 41 is fixedly connected to the screw shaft in the large screw mold. The telescopic rods of the third hydraulic cylinder 802 and the fourth hydraulic cylinder 803 are retracted, so that the two push rods 32 drive the movable ring 31 to move to the rightmost position, and the transmission rod 20 is also located at the rightmost end of the sliding shaft 26. The right support device 45 is located at the right end of the main top shaft 19;

[0062] In the second step of demoulding, the demoulding motor 9 is started to rotate, and the demoulding motor 9 drives the planetary reducer 801. The final output speed of the planetary reducer 801 is 2 rpm. The planetary reducer 801 drives the sliding shaft 26 to rotate. While the sliding shaft 26 rotates, the third hydraulic cylinder 802 and the fourth hydraulic cylinder 803 synchronously push the movable ring 31, and the movable ring 31 pushes the fixed ring 30. The stabilizing sleeve 29 moves synchronously. The transmission rod 20 moves synchronously to the left while rotating. At this time, the universal joint 21, the main top shaft 19, and the large The screw shaft and the auxiliary top shaft 41 in the large screw mold move and rotate synchronously, and demoulding begins. The fixing ring 30 is slowly pushed to the left by the third hydraulic cylinder 802 and the fourth hydraulic cylinder 803. The transmission rod 20 pushes the universal joint 21 and the main top shaft 19 to move and rotate to the left and drive the screw shaft in the large screw mold. At this time, the left correction device 42 and the right correction device 43 start to run synchronously. The A-correction hydraulic cylinder 48 of the left correction device 42 starts to push the arc support plate 49 toward the main top shaft 19. At the same time, the right correction device 43 starts to move synchronously. The E-correction hydraulic cylinder 48 of the device 43 starts to push the arc support plate 49 toward the secondary top shaft 41, and then the B-correction hydraulic cylinder 48 of the left correcting device 42 starts to operate, and the F-correction hydraulic cylinder 48 of the right correcting device 43 starts to operate, and the C-correction hydraulic cylinder 48 of the left correcting device 42 starts to operate, and the G-correction hydraulic cylinder 48 of the right correcting device 43 starts to operate, and the D-correction hydraulic cylinder 48 of the left correcting device 42 starts to operate, and the H-correction hydraulic cylinder 48 of the right correcting device 43 starts to operate, through the left correcting device The correction hydraulic cylinder 48 on the device 42 and the right correction device 43 runs in opposite directions to make the screw shaft in the large screw mold do a tilting action like a tilting rod, which helps demoulding. When the left correction device 42 and the right correction device 43 are running, the left support device 44 and the right support device 45 respectively play a role in stabilizing the main top shaft 19 and the secondary top shaft 41. Through the continuous feeding of the demoulding motor 9, the third hydraulic cylinder 802 and the fourth hydraulic cylinder 803, the screw shaft in the large screw mold is demoulded from the large screw mold to the left side.

[0063] Finally, it should be pointed out that the above embodiments are only representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

Claims

1. A demoulding device after rubber lining of a large screw, comprising a frame bottom plate (1) and a frame top plate (2), wherein the frame bottom plate (1) and the frame top plate (2) are both arranged flat, and characterized in that The four corners of the frame bottom plate (1) are vertically provided with side support beams (3); the frame top plate (2) is arranged on the top of the four side support beams (3); a front support beam (4) is fixedly connected between the inner sides of the middle parts of the two side support beams (3) located on the front side; a rear support beam (5) is fixedly connected between the inner sides of the middle parts of the two side support beams (3) located on the rear side; the front support beam (4) and the rear support beam (5) are arranged at the same horizontal height; a tooling table (6) is provided on the upper left side of the middle part of the frame bottom plate (1); a demoulding clamp (7) is provided on the upper side of the middle part of the tooling table (6); a motor mounting table (8) is provided on the upper surface of the right end part of the frame bottom plate (1); a demoulding motor (9) is provided on the upper surface of the right end part of the motor mounting table (8); the front support beam (4) and the rear support beam (5) are arranged at the same horizontal height; A mobile trolley (10) is provided on the upper side between the rear support beams (5), and the front and rear sides of the bottom of the mobile trolley (10) are both provided with mobile wheels. The mobile wheels on the front side of the mobile trolley (10) are provided on the upper surface of the front support beam (4), and the mobile wheels on the rear side of the mobile trolley (10) are provided on the upper surface of the rear support beam (5). A first hydraulic cylinder (11) is provided on the upper surface of the middle part of the mobile trolley (10), and the telescopic rod of the first hydraulic cylinder (11) extends to the lower part between the front support beam (4) and the rear support beam (5). A top pressure plate (12) is horizontally provided at the lower end of the telescopic rod of the first hydraulic cylinder (11), and V-shaped reinforcing ribs (13) are fixedly provided on the beam bodies of the frame bottom plate (1), the frame top plate (2), the side support beam (3), the front support beam (4) and the rear support beam (5); The demoulding clamp (7) comprises a bottom mold clamp (701) and a top mold clamp (702), the inner sides of the bottom mold clamp (701) and the top mold clamp (702) are mold cavities, and the mold cavities are used for positioning and clamping, the lower side of the bottom mold clamp (701) is fixed to the middle of the tooling table (6), and the upper surface of the top mold clamp (702) is connected to the top pressure plate (12); A planetary reducer (801) is provided on the upper surface of the left end of the motor mounting platform (8), the input end of the planetary reducer (801) is connected to the output shaft of the demoulding motor (9), a third hydraulic cylinder (802) is provided in the left end of the motor mounting platform (8), a fourth hydraulic cylinder (803) is provided above the planetary reducer (801), and the fourth hydraulic cylinder (803) is fixed to the lower part between the front support beam (4) and the rear support beam (5) through a connecting frame; A hydraulic cylinder mounting platform (14) is fixedly provided on the right end portion between the front support beam (4) and the rear support beam (5), a second hydraulic cylinder (15) is fixedly provided on the upper side of the hydraulic cylinder mounting platform (14), support rods (16) are vertically provided upward at the four corners of the mobile trolley (10), a reinforcing beam is connected between the upper ends of the four support rods (16), an equal gap is left between the upper end surfaces of the four support rods (16) and the lower surface of the frame top plate (2), and the left end portion of the telescopic rod of the second hydraulic cylinder (15) is slidably connected to the support rod (16) on the right side of the mobile trolley (10) in an upward and downward manner; A main top shaft (19), a universal joint (21) and a transmission rod (20) are arranged in sequence from left to right between the demoulding clamp (7) and the planetary reducer (801). The main top shaft (19), the universal joint (21) and the transmission rod (20) are arranged horizontally and coaxially. The main top shaft (19) and the transmission rod (20) are connected via the universal joint (21). A square groove (22) is provided in the center of the left end surface of the main top shaft (19). A pin hole (23) is provided on the bottom side of the square groove (22) and penetrates the main top shaft (19). A soft metal cover (23) is provided on the left end surface of the main top shaft (19). 24), an opening is provided in the middle of the soft metal cover (24), and the opening corresponds to the size and position of the square groove (22); a sliding hole (25) is provided at the axis of one end of the transmission rod (20) away from the main top shaft (19); a sliding shaft (26) is slidably connected in the sliding hole (25); a flat key pin (27) is fixed on the shaft of the sliding shaft (26); a pin groove (28) is provided on the inner wall of the sliding hole (25), and the outer side of the flat key pin (27) is slidably arranged in the pin groove (28); and the end of the sliding shaft (26) away from the transmission rod (20) is connected to the output end of the planetary reducer (801); Both sides of the middle of the transmission rod (20) are sleeved with stabilizing sleeves (29), and the two stabilizing sleeves (29) are slidably mounted on the transmission rod (20). A fixed ring (30) is fixedly sleeved on the right end of the transmission rod (20), and a movable ring (31) is movably sleeved on the right side of the fixed ring (30) and on the transmission rod (20). Push rods (32) are fixedly connected to the upper and lower sides of the movable ring (31), and the lower end of the push rod (32) located on the lower side of the movable ring (31) is connected to the telescopic push rod of the third hydraulic cylinder (802), and the upper end of the push rod (32) located on the upper side of the movable ring (31) is connected to the telescopic push rod of the fourth hydraulic cylinder (803). A connecting rod (33) is vertically fixedly mounted on the upper sides of the two fixed rings (30), and a reinforcing rod (34) is provided between the two connecting rods. A top plate (35) is fixedly provided on the lower side between the middle part of the front support beam (4) and the middle part of the rear support beam (5), a sliding rod (36) is horizontally provided on the lower side of the top plate (35), two ends of the sliding rod (36) are respectively fixed to the lower sides of the left and right ends of the top plate (35), a slide plate (37) is provided on the right end of the slide rod (36), the slide plate (37) is slidably provided on the slide rod (36), the upper surface of the slide plate (37) is slidably connected to the lower surface of the top plate (35), and is located on the left side of the slide plate (37) and in the middle of the slide rod (36). A slide cylinder (38) is provided, the slide cylinder (38) is slidably arranged on the slide rod (36), a support spring (39) is sleeved on the slide rod (36) between the slide cylinder (38) and the slide plate (37), the left end of the support spring (39) is fixed to the right end of the slide cylinder (38), the right end of the support spring (39) is fixed to the left end of the slide plate (37), the upper ends of the two connecting rods (33) are fixed to the lower surface of the slide plate (37), and a horizontally placed top rod (40) is horizontally fixedly connected to the left side of the upper end of the connecting rod (33) located on the left side; A secondary top shaft (41) is horizontally arranged on the left side of the demoulding clamp (7); the secondary top shaft (41) and the main top shaft (19) are horizontally coaxially arranged; the right end of the secondary top shaft (41) has the same structure as the left end of the main top shaft (19); a left correcting device (42) is arranged on the right end of the secondary top shaft (41); a right correcting device (43) is arranged on the left end of the main top shaft (19); the left correcting device (42) and the right correcting device (43) have the same structure; a left supporting device (44) is arranged on the left end of the secondary top shaft (41); and a right supporting device (45) is arranged on the right end of the main top shaft (19); The right correction device (43) comprises a circular ring body (46) and an inner positioning ring (47), a plurality of correction hydraulic cylinders (48) are evenly distributed and embedded on the inner ring surface of the circular ring body (46), the outer ring surface of the inner positioning ring (47) and the inner ring surface of the circular ring body (46) are fixedly connected via a plurality of connecting pieces, the telescopic rods of the plurality of correction hydraulic cylinders (48) are slidably penetrated through the inner side of the inner positioning ring (47), and an arc-shaped support plate (49) is provided on the inner side of the inner positioning ring (47) and at the end of the telescopic rod of the correction hydraulic cylinder (48); A stabilizing frame (50) is provided on the left side of the left supporting device (44), the bottom of the stabilizing frame (50) is slidably connected to the upper surface of the workbench (6), a stabilizing frame slide plate (501) is provided above the stabilizing frame (50), the stabilizing frame slide plate (501) is fixed to the lower side between the front support beam (4) and the rear support beam (5), the upper end of the stabilizing frame (50) is slidably connected to the lower surface of the stabilizing frame slide plate (501), the right side of the upper end of the stabilizing frame (50) is fixedly connected to a suspension frame (502), and the left end surface of the secondary top shaft (41) is movably pressed against the right side surface of the stabilizing frame (50); Four fixing columns (51) are connected to the outer ring surface of the annular body (46) of the right correction device (43), the outer ends of two of the four fixing columns (51) are respectively fixed to the lower sides of the front support beam (4) and the rear support beam (5), and the remaining two of the four fixing columns (51) are respectively fixed to the front and rear sides of the frame bottom plate (1); The lower end of the circular ring body (46) of the left correction device (42) is slidably connected to the upper surface of the tooling table (6), and the upper end of the circular ring body (46) of the left correction device (42) is fixedly connected to the lower surface of the suspension (502); The left support device (44) comprises a support ring (52) and an elastic support member, wherein the number of the elastic support members is three, and the elastic support member comprises a piston sleeve (53), a piston rod (54) and an arc-shaped movable plate (55). The piston rod (54) is slidably arranged in the piston sleeve (53), the arc-shaped movable plate (55) is fixed on the outer end of the piston rod (54), a pressure spring (56) is sleeved on the piston rod (54), and a plurality of rollers (57) are rotatably arranged on the inner concave arc surface of the arc-shaped movable plate (55). The piston sleeves (53) of the three elastic support members are evenly distributed in an annular manner and fixed on the support ring. On the inner ring surface of the ring (52), the left support device (44) and the right support device (45) have the same structure, the lower end of the support ring (52) of the left support device (44) is slidably connected to the upper surface of the tooling table (6), the upper end of the support ring (52) of the left support device (44) is fixedly connected to the lower surface of the suspension (502), a fixing rod (521) is fixedly connected between the upper end of the support ring (52) of the right support device (45) and the slide cylinder (38), and the lower end of the support ring (52) of the right support device (45) is slidably connected to the upper surface of the tooling table (6) through a sliding member.

2. The demoulding device after rubber lining of a large screw according to claim 1 is characterized in that An oil guide groove (58) is provided on the inner concave arc surface of the arc-shaped support plate (49), the oil guide groove (58) is arranged in a serpentine shape, a plurality of oil guide holes (59) are provided on the inner side of the oil guide groove (58), an oil guide pipe (60) is connected to the arc-shaped support plate (49), and the oil guide pipe (60) is communicated with the plurality of oil guide holes (59).

3. The demoulding device after rubber lining of a large screw according to claim 2 is characterized in that The number of the correcting hydraulic cylinders (48) is eight, and the eight correcting hydraulic cylinders (48) are numbered A, B, C, D, E, F, G, and H, respectively, wherein the A-correcting hydraulic cylinder (48) is arranged opposite to the E-correcting hydraulic cylinder (48), the B-correcting hydraulic cylinder (48) is arranged opposite to the F-correcting hydraulic cylinder (48), the C-correcting hydraulic cylinder (48) is arranged opposite to the G-correcting hydraulic cylinder (48), and the D-correcting hydraulic cylinder (48) is arranged opposite to the H-correcting hydraulic cylinder (48).

4. The demoulding method of a demoulding device after a large screw lined with rubber according to claim 3 is characterized in that The demoulding method is: In the first preparation stage, the existing large screw mold to be demoulded is placed horizontally on the bottom mold clamp (701), the second hydraulic cylinder (15) controls the mobile crane (10) to move to the top of the bottom mold clamp (701), and controls the first hydraulic cylinder (11) to push the top mold clamp (702) downward to apply pressure. While applying pressure downward, the first hydraulic cylinder (11) will push the mobile crane (10) upward due to the pressure. After being lifted up, the tops of the four support rods (16) will be supported on the lower surface of the frame top plate (2), so that the first hydraulic cylinder (11) can firmly push the top mold clamp ( 702), so that the large screw mold is fixed. After the large screw mold is fixed, the left end of the main top shaft (19) is fixedly docked with the screw shaft in the large screw mold, and the right end of the auxiliary top shaft (41) is fixedly docked with the screw shaft in the large screw mold. The telescopic rods of the third hydraulic cylinder (802) and the fourth hydraulic cylinder (803) are retracted, so that the two push rods (32) drive the movable ring (31) to move to the rightmost position, and the transmission rod (20) is also located at the rightmost end of the sliding shaft (26). The right support device (45) is located at the right end of the main top shaft (19); In the second demoulding stage, the demoulding motor (9) is started to rotate, and the demoulding motor (9) drives the planetary reducer (801). The final output speed of the planetary reducer (801) is 2 rpm. The planetary reducer (801) drives the sliding shaft (26) to rotate. While the sliding shaft (26) rotates, the third hydraulic cylinder (802) and the fourth hydraulic cylinder (803) synchronously push the movable ring (31), and the movable ring (31) pushes the fixed ring (30). The stabilizing sleeve (29) moves synchronously. The transmission rod (20) moves synchronously to the left while rotating. At this time, the universal joint (21) and the main top shaft (19 ), the screw shaft and the auxiliary top shaft (41) in the large screw mold move and rotate synchronously, and demoulding begins. The fixing ring (30) is slowly pushed to the left by the third hydraulic cylinder (802) and the fourth hydraulic cylinder (803). The transmission rod (20) pushes the universal joint (21) and the main top shaft (19) to move and rotate to the left and drive the screw shaft in the large screw mold. At this time, the left correction device (42) and the right correction device (43) start to operate synchronously. The A-correction hydraulic cylinder (48) of the left correction device (42) starts to push the arc support plate (49) toward the main top shaft (19). At the same time, the right correction device (43) starts to move the arc support plate (49) toward the main top shaft (19). The E-correction hydraulic cylinder (48) of the correcting device (43) starts to push the arc-shaped support plate (49) toward the auxiliary top shaft (41), and then the B-correction hydraulic cylinder (48) of the left correcting device (42) operates, and the F-correction hydraulic cylinder (48) of the right correcting device (43) operates; the C-correction hydraulic cylinder (48) of the left correcting device (42) operates, and the G-correction hydraulic cylinder (48) of the right correcting device (43) operates; the D-correction hydraulic cylinder (48) of the left correcting device (42) operates, and the H-correction hydraulic cylinder (48) of the right correcting device (43) operates, and the The correcting hydraulic cylinders (48) on the left correcting device (42) and the right correcting device (43) operate in opposite directions, so that the screw shaft in the large screw mold performs a tilting action like a tilting rod, which helps demoulding. When the left correcting device (42) and the right correcting device (43) are running, the left supporting device (44) and the right supporting device (45) respectively play a role in stably supporting the main top shaft (19) and the auxiliary top shaft (41). Through the continuous feeding of the demoulding motor (9), the third hydraulic cylinder (802) and the fourth hydraulic cylinder (803), the screw shaft in the large screw mold is demoulded from the large screw mold to the left side.

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