Electrically driven mold opening and closing device and curing press

Abstract

The utility model discloses a kind of electric power driven mold opening and closing device and curing press, it belongs to curing press technical field, including base, two walls are respectively equipped in the both sides of base, two walls on the same side upper and lower ends are respectively equipped with upper connecting plate and lower connecting plate, rotating lead screw is rotatably connected between upper connecting plate and lower connecting plate, speed reducer motor is installed on upper connecting plate, and speed reducer motor is connected with rotating lead screw upper end;It further includes opening and closing seat, and the upper die of opening and closing seat is connected with curing press, and opening and closing seat is fixed with lead screw nut, and lead screw nut is connected with rotating lead screw;Brake band is equipped in speed reducer motor, and speed reducer motor is further connected with sensor, and sensor can judge whether brake band is invalid;Opening and closing seat is further connected with anti-falling device, and when sensor receives the signal of brake band invalid, anti-falling device can limit the fall of opening and closing seat.The above structure can realize mold opening and closing action using lead screw nut pair, and the falling risk of curing press upper die is avoided.

Description

Technical Field

[0001] This utility model relates to the field of vulcanizing machine technology, specifically to an electrically driven mold opening and closing device and a vulcanizing machine. Background Technology

[0002] Currently, the mold opening and closing devices of all-steel and semi-steel hydraulic vulcanizing machines are mostly driven by hydraulic cylinders, which require a hydraulic station and hydraulic pipelines, occupying a large space and having high maintenance costs. Moreover, hydraulic cylinders are prone to oil leakage during use, polluting the environment and affecting the stability of equipment use. In addition, the control accuracy of the cylinder is affected by the temperature and pressure fluctuations of the hydraulic oil, resulting in low motion accuracy.

[0003] Although a structure has emerged on the market that uses a geared motor to drive a lead screw, and then uses the lead screw nut to drive the opening and closing seat to rise and fall, in order to solve the problem of hydraulic cylinders, if the above drive method fails, or if the lead screw nut is severely worn, it will lead to the risk of the upper mold of the vulcanizing machine falling. In order to reduce the above risks, a lot of time needs to be invested in inspection and maintenance, which brings new troubles to enterprises.

[0004] In view of the problems existing in the prior art, this utility model designs and manufactures an electrically driven mold opening and closing device and a vulcanizing machine to overcome the above defects. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides an electrically driven mold opening and closing device and a vulcanizing machine, which can realize the mold opening and closing action using a screw and nut pair, and avoids the risk of the upper mold falling off the vulcanizing machine.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an electrically driven mold opening and closing device includes a base, two wall plates are respectively provided on both sides of the base, and an upper connecting plate and a lower connecting plate are respectively provided at the upper and lower ends of the two wall plates on the same side. A rotating screw is rotatably connected between the upper connecting plate and the lower connecting plate, and a reduction motor is installed on the upper connecting plate. The reduction motor is connected to the upper end of the rotating screw. It also includes an opening and closing seat, which is connected to the upper mold of the vulcanizing machine. A lead screw nut is fixed on the opening and closing seat, and the lead screw nut is screwed to the rotating lead screw. The geared motor is equipped with a brake, and the geared motor is also connected to a sensor, which can determine whether the brake has failed. The opening and closing seat is also connected to an anti-fall device. When the sensor receives a signal of brake failure, the anti-fall device can limit the falling of the opening and closing seat.

[0007] Preferably, a nut cover is installed on the upper end of the lead screw nut, and the nut cover is connected to the opening and closing seat.

[0008] Preferably, a lifting guide structure is provided between the opening / closing seat and the wall panel.

[0009] Preferably, the opening and closing seat is provided with a guide fixing seat near each of the four wall panels, the guide fixing seat is provided with a slider, and each of the wall panels is provided with a guide rail, so that the opening and closing seat can be guided up and down along the guide rail by the slider.

[0010] Preferably, the fall protection device includes a fall protection trapezoidal screw, the two ends of which are rotatably connected to the upper connecting plate and the lower connecting plate, respectively. The opening and closing seat is fixed with a trapezoidal screw nut for preventing falls, and the trapezoidal screw nut for preventing falls is screwed to the trapezoidal screw for preventing falls. The lower end of the rotating lead screw is connected to an electromagnetic clutch, and the driven part of the electromagnetic clutch is connected to a driving gear. The lower end of the anti-fall trapezoidal lead screw is connected to a driven gear, and the driven gear meshes with the driving gear through an intermediate wheel. It also includes a controller, and the sensors and electromagnetic clutches are all connected to the controller.

[0011] Preferably, the anti-fall trapezoidal screw nut is fitted with a nut cover, the nut cover is fixed on the opening and closing seat, and an anti-rotation structure is provided between the anti-fall trapezoidal screw nut and the nut cover, which can only move relative to each other axially. The anti-fall trapezoidal screw nut has an elastic element at at least one end, one end of which abuts against the end face of the anti-fall trapezoidal screw nut, and the other end of which abuts against the end face of the opening and closing seat, and / or the nut cover is far away from the boss at one end of the closing seat.

[0012] Preferably, the anti-rotation structure includes a guide groove provided on the inner wall of the nut cover or the outer wall of the anti-fall trapezoidal screw nut, and a guide block or guide pin provided on the inner wall of the nut cover or the outer wall of the anti-fall trapezoidal screw nut, wherein the guide block or guide pin can slide and guide with the guide groove.

[0013] Preferably, the fall protection device includes a pneumatic-hydraulic cylinder, which is installed on a wall panel or base below the opening and closing seat, and the cylinder rod of the pneumatic-hydraulic cylinder is connected to the opening and closing seat. The gas-liquid cylinder is connected to the gas-liquid converter, and a hydraulic blocking device is provided on the hydraulic pipeline between the gas-liquid cylinder and the gas-liquid converter. It also includes a controller, and the hydraulic blocking device and sensors are all connected to the controller.

[0014] Preferably, the medium in the cylinder rod chamber of the gas-liquid cylinder is nitrogen, the medium in the piston chamber of the gas-liquid cylinder is hydraulic oil, and the piston chamber is connected to one end of a hydraulic pipeline; The gas pressure chamber of the gas-liquid converter contains nitrogen gas, and the hydraulic chamber contains hydraulic oil. The hydraulic chamber is connected to the other end of the hydraulic pipeline.

[0015] A vulcanizing machine includes the above-described mold opening and closing device, wherein the bottom of the opening and closing seat of the mold opening and closing device is connected to the upper mold of the vulcanizing machine.

[0016] The advantages of this utility model are: 1. This utility model utilizes a geared motor and a lead screw pair to realize the opening and closing action of the vulcanizing machine, which can eliminate the risk of hydraulic cylinder leakage. Moreover, by introducing an anti-fall device, it avoids the problem of falling caused by brake failure and lead screw nut wear, thus improving the safety of equipment use.

[0017] 2. In this utility model, the anti-fall trapezoidal lead screw on one side of the rotating lead screw prevents a fall when the opening and closing seat and the upper mold of the vulcanizing machine are subjected to gravity, which is transmitted to the anti-fall trapezoidal lead screw nut. The self-locking mechanism of the anti-fall trapezoidal lead screw prevents the fall. Specifically, the failure of the brake is determined by a rapid sensor response, followed by a controller that activates the electromagnetic clutch to disengage the gear pair between the rotating lead screw and the anti-fall trapezoidal lead screw, ultimately ensuring that the anti-fall trapezoidal lead screw can independently perform its self-locking function.

[0018] 3. The design of the pneumatic-hydraulic cylinder and pneumatic-hydraulic converter in this utility model eliminates the need for a hydraulic station, which reduces equipment costs and the probability of oil leakage. By utilizing the hydraulic blocking device on the hydraulic pipeline between the pneumatic-hydraulic cylinder and the pneumatic-hydraulic converter, the controller can control the hydraulic blocking device to block the oil circuit between the pneumatic-hydraulic cylinder and the pneumatic-hydraulic converter when the brake fails and a fall occurs. Due to the incompressibility of the hydraulic oil in the piston chamber of the pneumatic-hydraulic cylinder, the descent of the cylinder rod is prevented, thereby preventing the opening and closing seat and the upper mold of the vulcanizing machine from falling.

[0019] 4. The present invention has a nut cover installed on the upper end of the lead screw nut, which is then connected to the opening and closing seat. When the lead screw nut transmits upward or downward force by rotating the lead screw, it can be directly transmitted to the opening and closing seat through the nut cover, avoiding the stress on the screw of the traditional lead screw nut and ensuring the structural strength of the lead screw nut during the lifting and lowering process of the opening and closing seat.

[0020] 5. This utility model can avoid the asynchrony problem caused by the difference in machining accuracy between the rotating screw and the anti-fall trapezoidal screw by setting an elastic element at at least one end face of the anti-fall trapezoidal screw nut. Attached Figure Description

[0021] Figure 1 A side view of a first embodiment of an electrically driven mold opening and closing device; Figure 2 This is a front view of a first embodiment of an electrically driven mold opening and closing device; Figure 3 This is a partial schematic diagram of the electromagnetic clutch in Embodiment 1 of this utility model; Figure 4 This is a partial schematic diagram of the anti-fall trapezoidal lead screw nut in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the nut cover according to Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of a guide block installed on the anti-fall trapezoidal lead screw nut according to Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of Embodiment 2 of the present invention.

[0022] In the diagram: 1. Base; 2. Wall panel; 3. Upper connecting plate; 4. Gear motor; 5. Rotating lead screw; 6. Opening / closing seat; 7. Lower connecting plate; 8. Lead screw nut; 9. Anti-fall trapezoidal lead screw; 10. Anti-fall trapezoidal lead screw nut; 11. Guide fixing seat; 12. Slider; 13. Guide rail; 14. Electromagnetic clutch; 15. Driving gear; 16. Intermediate wheel; 17. Driven gear; 18. Pneumatic-hydraulic cylinder; 19. Pneumatic-hydraulic converter; 20. Hydraulic pipeline; 21. Hydraulic blocking device; 101. Nut cover; 102. Limit sleeve; 103. Elastic element; 104. Guide groove; 105. Guide block; 181. Cylinder rod cavity; 182. Piston cavity; 191. Hydraulic cavity; 192. Pneumatic cavity. Detailed Implementation

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0024] like Figures 1 to 7 As shown, an electrically driven mold opening and closing device includes a base 1. Two wall plates 2 are provided on both sides of the base 1. An upper connecting plate 3 and a lower connecting plate 7 are provided at the upper and lower ends of the two wall plates 2 on the same side, respectively. A rotating screw 5 is rotatably connected between the upper connecting plate 3 and the lower connecting plate 7. Specifically, the two are rotatably connected by a bearing, preferably a thrust radial bearing.

[0025] A geared motor 4 is installed on the upper connecting plate 3. The geared motor 4 is connected to the upper end of the rotating lead screw 5. The geared motor 4 specifically includes a servo motor and a reducer. The output shaft of the reducer can be a hollow shaft, and the end of the rotating lead screw 5 can be directly inserted into the hollow shaft. Alternatively, it can be a solid shaft, and the two can be connected by a coupling.

[0026] It also includes an opening and closing seat 6, which is connected to the upper mold of the vulcanizing machine. A screw nut 8 is fixed on the opening and closing seat 6, and the screw nut 8 is screwed to the rotating screw 5. When the rotating screw 5 rotates, the screw nut 8 can move up and down on the screw, which can drive the opening and closing seat 6 and the upper mold of the vulcanizing machine to move up and down synchronously.

[0027] Preferably, a nut cover is installed on the upper end of the lead screw nut 8. The nut cover is connected to the opening and closing seat 6. When the lead screw nut 8 transmits upward or downward force by rotating the lead screw 5, it can be directly transmitted to the opening and closing seat 6 through the nut cover. This avoids the stress on the screw mounting screw of the traditional lead screw nut 8 and ensures the structural strength of the lead screw nut 8 during the lifting and lowering process of the opening and closing seat 6.

[0028] The geared motor 4 of this utility model is equipped with a brake. Activating the brake can limit the rotation of the output shaft of the geared motor 4. The geared motor 4 is also connected to a sensor that can determine whether the brake has failed. The specific sensor can be an encoder or speed sensor installed on the shaft of the geared motor 4, or a Hall sensor installed on the geared motor 4, etc. Any sensor that can determine whether the brake has failed can meet the usage requirements.

[0029] The opening / closing seat 6 is also connected to a fall protection device. When the sensor receives a signal of brake failure, the fall protection device can limit the fall of the opening / closing seat 6.

[0030] Example 1

[0031] like Figures 1 to 6 The fall protection device in this embodiment includes a fall protection trapezoidal screw 9, which is arranged in parallel with the rotating screw 5. The two ends of the fall protection trapezoidal screw 9 are rotatably connected to the upper connecting plate 3 and the lower connecting plate 7, respectively. Specifically, the two are also rotatably connected by bearings, preferably thrust radial bearings.

[0032] The opening and closing seat 6 is fixed with a fall-prevention trapezoidal screw nut 10, which is screwed to the fall-prevention trapezoidal screw 9. The two have a self-locking function. The principle is that the thread helix angle is less than the equivalent friction angle of the thread pair, so that when there is no external force driving, the axial load cannot push the fall-prevention trapezoidal screw nut 10 (or fall-prevention trapezoidal screw 9) to move on its own, thereby achieving position locking.

[0033] An electromagnetic clutch 14 is connected to the lower end of the rotating lead screw 5. A drive gear 15 is connected to the driven part of the electromagnetic clutch 14. A driven gear 17 is connected to the lower end of the anti-fall trapezoidal lead screw 9. The driven gear 17 meshes with the drive gear 15 through the intermediate wheel 16 to ensure that the rotating lead screw 5 and the anti-fall trapezoidal lead screw 9 rotate in the same direction. This utility model utilizes the connection between the electromagnetic clutch 14 and the gear pair to realize the switching between synchronous rotation and independent rotation of the rotating lead screw 5 and the anti-fall trapezoidal lead screw 9.

[0034] Specifically, when the electromagnetic clutch 14 is energized and engaged, the rotating lead screw 5 and the anti-fall trapezoidal lead screw 9 are connected through a gear pair, enabling the two lead screws to start and stop rotating synchronously. At this time, the rotating lead screw 5 can drive the opening and closing seat 6 and the vulcanizing machine upper mold to rise and fall, while the anti-fall trapezoidal lead screw nut 10 on the rotating anti-fall trapezoidal lead screw 9 also rises and falls along with the opening and closing seat 6. When the electromagnetic clutch 14 is de-energized and disengaged, the synchronous transmission between the drive gear 15 and the rotating lead screw 5 is disconnected, which is equivalent to the rotating lead screw 5 and the anti-fall trapezoidal lead screw 9 rotating independently. The power for the rotation of the anti-fall trapezoidal lead screw 9 is cut off, and the fall of the opening and closing seat 6 and the vulcanizing machine upper mold will be quickly prevented by the self-locking of the anti-fall trapezoidal lead screw 9.

[0035] This embodiment also includes a controller. The sensor and the electromagnetic clutch 14 are all connected to the controller. Whether the brake fails is quickly detected by the sensor. Then, the controller controls the electromagnetic clutch 14 to release the transmission of the gear pair between the rotating lead screw 5 and the anti-fall trapezoidal lead screw 9, so as to ensure that the anti-fall trapezoidal lead screw 9 can independently play the self-locking function.

[0036] In this embodiment, the anti-fall trapezoidal lead screw nut 10 is preferably fitted with a nut cover 101, which is fixed to the opening and closing seat 6. An anti-rotation structure, allowing only relative axial movement, is provided between the anti-fall trapezoidal lead screw nut 10 and the nut cover 101. Specifically, the anti-fall trapezoidal lead screw nut 10 has an elastic element 103 at at least one end. One end of the elastic element 103 abuts against the end face of the anti-fall trapezoidal lead screw nut 10, and the other end abuts against the end face of the opening and closing seat 6. And / or, the nut cover 101 is located away from the boss at one end of the opening and closing seat 6. The purpose of the above structure is to avoid asynchrony between the rotating lead screw 5 and the anti-fall trapezoidal lead screw 9 due to differences in machining accuracy.

[0037] The elastic element 103 is preferably a spring washer or a spring. To prevent the threads on the anti-fall trapezoidal screw 9 from contacting the spring washer or spring, a limiting sleeve 102 is provided on the outer sleeve of the elastic element 103. The outer diameter of the limiting sleeve 102 is equal to the inner diameter of the nut cover 101, and the inner diameter of the limiting sleeve 102 is equal to the outer diameter of the elastic element 103. In this way, the limiting sleeve 102 can restrict the radial movement of the spring washer or spring. It should be noted that the height of the spring limiting sleeve 102 should be less than the length of the elastic element 103 after compression, so as to prevent the end face of the anti-fall trapezoidal screw nut 10 from contacting the end of the limiting sleeve 102 after the elastic element 103 is compressed.

[0038] The anti-rotation structure of this embodiment specifically includes a guide groove 104 provided on the inner wall of the nut cover 101 or the outer wall of the anti-fall trapezoidal screw nut 10, and a guide block 105 or guide pin provided on the inner wall of another nut cover 101 or the outer wall of the anti-fall trapezoidal screw nut 10. The guide block 105 or guide pin can slide and guide with the guide groove 104.

[0039] Specific usage process of Example 1: Mold opening and closing action: The geared motor 4 drives the rotating screw 5 to rotate, and the screw nut 8 on the rotating screw 5 drives the opening and closing seat 6 to rise and fall. At this time, the electromagnetic clutch 14 is energized, and the drive gear 15 rotates synchronously with the rotating screw 5. Through the gear pair, it drives the anti-fall trapezoidal screw 9 to rotate. The anti-fall trapezoidal screw nut 10 rises and falls synchronously with the anti-fall trapezoidal screw 9 and is not subject to load force.

[0040] When the geared motor 4 needs to be braked, the electromagnetic clutch 14 is de-energized, and the rotation of the rotating screw 5 will not drive the drive gear 15 to rotate. The synchronous transmission between the drive gear 15 and the rotating screw 5 is disconnected, and the power to rotate the anti-fall trapezoidal screw 9 is cut off. At this time, even if the geared motor 4 brake fails, the opening and closing seat 6 will fall onto the anti-fall trapezoidal screw nut 10 due to gravity. The self-locking of the anti-fall trapezoidal screw 9 will prevent the opening and closing seat 6 and the vulcanizing machine upper mold from falling.

[0041] Example 2

[0042] like Figure 7 As shown, the fall protection device in this embodiment includes a pneumatic-hydraulic cylinder 18, which is installed on the wall plate 2 or base 1 below the opening and closing seat 6. The cylinder rod of the pneumatic-hydraulic cylinder 18 is connected to the opening and closing seat 6, and the pneumatic-hydraulic cylinder 18 is connected to the pneumatic-hydraulic converter 19. A hydraulic blocking device 21 is provided on the hydraulic pipeline 20 between the pneumatic-hydraulic cylinder 18 and the pneumatic-hydraulic converter 19. The hydraulic oil blocking device can be a power failure shut-off valve or a hydraulic lock, etc., which can close the oil circuit.

[0043] It also includes a controller, a hydraulic braking device 21, and sensors, all of which are connected to the controller. In the event of brake failure and a fall, the controller can control the hydraulic braking device 21 to block the oil circuit between the gas-liquid cylinder 18 and the gas-liquid converter 19. Due to the incompressibility of the hydraulic oil in the piston chamber 182 of the gas-liquid cylinder 18, the cylinder rod of the gas-liquid cylinder 18 is prevented from falling, thereby preventing the opening and closing seat 6 and the upper mold of the vulcanizing machine from falling.

[0044] Specifically, the medium in the rod chamber 181 of the pneumatic-hydraulic cylinder 18 is nitrogen, and the medium in the piston chamber 182 of the pneumatic-hydraulic cylinder 18 is hydraulic oil. The piston chamber 182 is connected to one end of the hydraulic pipeline 20. The medium in the pneumatic chamber 192 of the pneumatic-hydraulic converter 19 is nitrogen, and the medium in the hydraulic chamber 191 of the pneumatic-hydraulic converter 19 is hydraulic oil. The hydraulic chamber 191 is connected to the other end of the hydraulic pipeline 20. The design of the pneumatic-hydraulic cylinder 18 and the pneumatic-hydraulic converter 19 in this invention eliminates the need for a hydraulic station, thereby reducing equipment costs and the probability of oil leakage.

[0045] Specific usage process of Example 2: Mold opening action: The geared motor 4 drives the rotating screw 5 to rotate, and the screw nut 8 on the rotating screw 5 drives the opening and closing seat 6 to rise and fall. At the same time, high-pressure nitrogen is introduced into the air pressure chamber 192 of the gas-liquid converter 19, and the cylinder rod chamber 181 of the gas-liquid cylinder 18 is connected to atmospheric pressure. The hydraulic oil in the hydraulic chamber 191 of the gas-liquid converter 19 enters the piston chamber 182 of the gas-liquid cylinder 18 through the hydraulic pipeline 20. The cylinder rod of the gas-liquid cylinder 18 extends. At this time, the gas-liquid cylinder 18 is used as a counterweight cylinder, which can not only offset the weight of the opening and closing seat 6, but also reduce the output load of the geared motor 4 during the lifting and lowering process, thus reducing energy consumption.

[0046] Mold closing action: High-pressure nitrogen gas is introduced into the cylinder rod chamber 181 of the gas-liquid cylinder 18, and the air pressure chamber 192 of the gas-liquid converter 19 is connected to atmospheric pressure. The hydraulic oil in the piston chamber 182 of the gas-liquid cylinder 18 will enter the hydraulic chamber 191 of the gas-liquid converter 19 through the hydraulic pipeline 20. The cylinder rod of the gas-liquid cylinder 18 will drive the opening and closing seat 6 to descend. Finally, the pulling force of the gas-liquid cylinder 18 and the gravity of the opening and closing seat 6 and the upper mold of the vulcanizing machine are used to provide power for secondary shaping. At the same time, it can also reduce the load on the reduction motor 4 and reduce energy consumption.

[0047] When the geared motor 4 needs to be braked, the hydraulic oil blocking device will block the hydraulic line 20 between the pneumatic-hydraulic cylinder 18 and the pneumatic-hydraulic converter 19. At this time, even if the geared motor 4 brake fails, the incompressibility of the hydraulic oil in the piston chamber 182 of the pneumatic-hydraulic cylinder 18 will prevent the cylinder rod of the pneumatic-hydraulic cylinder 18 from falling, thereby preventing the opening and closing seat 6 and the upper mold of the vulcanizing machine from falling.

[0048] In addition, the opening and closing seat 6 and the wall panel 2 in the above two embodiments are provided with a lifting guide structure. Specifically, the opening and closing seat 6 is provided with a guide fixing seat 11 near the four wall panels 2. The guide fixing seat 11 is provided with a slider 12. Each wall panel 2 is provided with a guide rail 13. The opening and closing seat 6 can be guided to rise and fall along the guide rail 13 by the slider 12. Alternatively, a structure of guide rod and guide sleeve can be set to ensure that the opening and closing seat 6 rises and falls stably.

[0049] This utility model also provides a vulcanizing machine, including the above-mentioned mold opening and closing device, wherein the bottom of the opening and closing seat 6 of the mold opening and closing device is connected to the upper mold of the vulcanizing machine.

[0050] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. An electrically powered opening and closing die apparatus, characterised in that, Includes a base (1), on both sides of the base (1) are provided two wall plates (2), and the upper and lower ends of the two wall plates (2) on the same side are respectively provided with an upper connecting plate (3) and a lower connecting plate (7). A rotating screw (5) is rotatably connected between the upper connecting plate (3) and the lower connecting plate (7). A reduction motor (4) is installed on the upper connecting plate (3), and the reduction motor (4) is connected to the upper end of the rotating screw (5). It also includes an opening and closing seat (6), which is connected to the upper mold of the vulcanizing machine. A screw nut (8) is fixed on the opening and closing seat (6), and the screw nut (8) is screwed to the rotating screw (5). The geared motor (4) is equipped with a brake, and the geared motor (4) is also connected to a sensor, which can determine whether the brake has failed. The opening and closing seat (6) is also connected to an anti-fall device. When the sensor receives a signal of brake failure, the anti-fall device can limit the fall of the opening and closing seat (6).

2. A power driven mould opening and closing device according to claim 1 wherein, The upper end of the lead screw nut (8) is equipped with a nut cover, which is connected to the opening and closing seat (6).

3. The power driven open-close mold apparatus according to claim 1, wherein A lifting guide structure is provided between the opening and closing seat (6) and the wall panel (2).

4. The electrically driven mold opening and closing device according to claim 3, characterized in that, The opening and closing seat (6) is provided with a guide fixing seat (11) near the four wall panels (2). The guide fixing seat (11) is provided with a slider (12). Each wall panel (2) is provided with a guide rail (13). The opening and closing seat (6) can be guided up and down along the guide rail (13) by the slider (12).

5. The electrically driven mold opening and closing device according to claim 1, characterized in that, The fall protection device includes a fall protection trapezoidal screw (9), and the two ends of the fall protection trapezoidal screw (9) are rotatably connected to the upper connecting plate (3) and the lower connecting plate (7) respectively. The opening and closing seat (6) is fixed with a fall-prevention trapezoidal screw nut (10), and the fall-prevention trapezoidal screw nut (10) is screwed to the fall-prevention trapezoidal screw (9); The lower end of the rotating lead screw (5) is connected to an electromagnetic clutch (14), and the driven part of the electromagnetic clutch (14) is connected to a driving gear (15). The lower end of the anti-fall trapezoidal lead screw (9) is connected to a driven gear (17), and the driven gear (17) meshes with the driving gear (15) through a median (16). It also includes a controller, and the sensor and electromagnetic clutch (14) are both connected to the controller.

6. The electrically driven mold opening and closing device according to claim 5, characterized in that, The anti-fall trapezoidal screw nut (10) is covered with a nut cover (101), which is fixed on the opening and closing seat (6). There is an anti-rotation structure between the anti-fall trapezoidal screw nut (10) and the nut cover (101) that can only move relative to each other axially. The anti-fall trapezoidal screw nut (10) has an elastic element (103) at at least one end. One end of the elastic element (103) abuts against the end face of the anti-fall trapezoidal screw nut (10), and the other end of the elastic element (103) abuts against the end face of the opening and closing seat (6). And / or, the nut cover (101) is far away from the boss at one end of the closing seat (6).

7. The electrically driven mold opening and closing device according to claim 6, characterized in that, The anti-rotation structure includes a guide groove (104) provided on the inner wall of the nut cover (101) or the outer wall of the anti-fall trapezoidal screw nut (10), and a guide block (105) or guide pin provided on the inner wall of the nut cover (101) or the outer wall of the anti-fall trapezoidal screw nut (10), wherein the guide block (105) or guide pin can slide and guide with the guide groove (104).

8. The electrically driven mold opening and closing device according to claim 1, characterized in that, The fall protection device includes a pneumatic-hydraulic cylinder (18), which is installed on the wall plate (2) or base (1) below the opening and closing seat (6), and the cylinder rod of the pneumatic-hydraulic cylinder (18) is connected to the opening and closing seat (6). The gas-liquid cylinder (18) is connected to the gas-liquid converter (19), and a hydraulic blocking device (21) is provided on the hydraulic pipeline (20) between the gas-liquid cylinder (18) and the gas-liquid converter (19). It also includes a controller, and the hydraulic blocking device (21) and the sensor are both connected to the controller.

9. The electrically driven mold opening and closing device according to claim 8, characterized in that, The medium in the cylinder rod chamber (181) of the gas-liquid cylinder (18) is nitrogen, and the medium in the piston chamber (182) of the gas-liquid cylinder (18) is hydraulic oil. The piston chamber (182) is connected to one end of the hydraulic pipeline (20). The gas-liquid converter (19) has nitrogen gas in its pneumatic chamber (192) and hydraulic oil in its hydraulic chamber (191). The hydraulic chamber (191) is connected to the other end of the hydraulic pipeline (20).

10. A vulcanizing machine, characterized in that, Includes an electrically driven mold opening and closing device as described in any one of claims 1 to 9, wherein the bottom of the opening and closing seat (6) of the electrically driven mold opening and closing device is connected to the upper mold of the vulcanizing machine.

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