A vulcanizing device for rubber sheet processing and control method thereof

Abstract

The present invention relates to the technical field of rubber vulcanization, in particular to a vulcanization device for processing rubber plates and a control method thereof, comprising four fixed rods arranged between an upper plate and a lower plate of a vulcanizer, a movable plate being slidably connected to the surfaces of the four fixed rods, a hydraulic cylinder being fixedly installed on the top of the upper plate, a piston rod end of the hydraulic cylinder being fixedly connected to the top of the movable plate, and further comprising: an upper mold and a lower mold, the upper mold being fixedly installed on the bottom of the movable plate, the lower mold being fixedly installed on the top of the lower plate, an air extraction storage mechanism being arranged on the surface of the upper mold; a blocking mechanism being arranged on the surface of the upper mold and used for blocking all exhaust holes; a control unit controlling the air extraction storage mechanism and the blocking mechanism to operate according to pressure detection information of a pressure detection unit to reduce the generation of bubbles during vulcanization.

Description

Technical Field

[0001] The invention relates to the technical field of rubber vulcanization, and in particular to a vulcanization device for rubber plate processing and a control method thereof. Background Art

[0002] In the rubber industry, the vulcanization process is the most critical link. Vulcanization is the last process in the production of rubber products. In this process, the rubber undergoes a series of chemical changes, which transforms the plastic rubber into an elastic or hard rubber product, thereby obtaining perfect physical and mechanical properties and chemical properties, and becoming a useful polymer material.

[0003] The main function of the vulcanizer is to provide the pressure and temperature required for vulcanization. During vulcanization, the rubber is placed in the mold, and then the mold is closed, and the mold after closing is clamped between the upper heating plate and the lower heating plate, and the mold is heated by the upper heating plate and the lower heating plate, so that the rubber is vulcanized under heating and pressure. The existing vulcanizing device will retain air inside the mold after closing the mold, which is not easy to be discharged. During the vulcanization process, the gas gathers in the rubber and causes bubbles to be generated, affecting the quality of vulcanization. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a vulcanizing device for rubber sheet processing and a control method thereof.

[0005] In a first aspect, the present invention provides a vulcanizing device for processing a rubber plate, comprising four fixed rods arranged between an upper plate and a lower plate of a vulcanizer, a movable plate being slidably connected to the surfaces of the four fixed rods, a hydraulic cylinder being fixedly mounted on the top of the upper plate, and an end of a piston rod of the hydraulic cylinder being fixedly connected to the top of the movable plate, and further comprising:

[0006] An upper mold and a lower mold, wherein the upper mold is fixedly mounted on the bottom of the movable plate, and the lower mold is fixedly mounted on the top of the lower plate, and a plurality of exhaust holes are provided on the surface of the upper mold in a circumferential array;

[0007] An annular cover is sleeved on the surface of the lower mold through an elastic support member, and the inner wall of the annular cover is in sealing contact with the surface of the lower mold;

[0008] A heating system is arranged inside the vulcanizer and is used to increase the temperature of the upper mold and the lower mold;

[0009] An air extraction and storage mechanism is provided on the surface of the upper mold and is used to extract and store air during the vulcanization process;

[0010] A blocking mechanism, disposed on the surface of the upper mold, for blocking all the exhaust holes;

[0011] A pressure detection unit, used to detect the pressure between the upper mold and the lower mold;

[0012] The control unit controls the operation of the vacuum storage mechanism and the blocking mechanism according to the pressure detection information of the pressure detection unit. When working, the upper mold and the lower mold are preheated in advance through the heating system, and the rubber material to be vulcanized is placed at the center of the lower mold. The control unit starts the hydraulic cylinder, and the piston rod of the hydraulic cylinder pushes the movable plate downward. The downward movable plate drives the upper mold downward. When the upper mold contacts the top of the annular cover, the upper mold and the lower mold are closed. As the upper mold continues to move downward, the annular cover will be driven downward and the elastic support will be compressed. The pressure detection unit will detect the pressure between the upper mold and the lower mold according to the compression amount of the elastic support. When the pressure detection unit senses pressure, it will first stop the operation of the hydraulic cylinder through the control unit, and start the vacuum storage mechanism to vacuum the space between the upper mold and the lower mold to reduce the internal The retention of air is conducive to the vulcanization space being in an environment close to vacuum. After the hydraulic cylinder stops operating for a preset time, the control unit stops the operation of the air extraction storage mechanism and re-controls the piston rod of the hydraulic cylinder to continue to drive the movable plate downward, and synchronously links the blocking mechanism to block all the exhaust holes, which is conducive to preventing the rubber generated by the vulcanization process from flowing into the exhaust holes. The elastic support member is arranged to facilitate the upper mold to press the annular cover, thereby pressing the rubber placed on the top of the lower mold waiting for vulcanization, in order to provide the required pressure for vulcanization and ensure that the rubber products achieve the expected performance. During the compression of the elastic support member, the blocking mechanism will be automatically linked to complete the sealing and auxiliary vulcanization first, and cancel the sealing after the vulcanization is completed. At the same time, the air extraction storage mechanism releases the internal stored airflow to assist the upper mold in demolding the vulcanized rubber.

[0013] Preferably, the elastic support member comprises:

[0014] Four connecting plates, each of which is fixedly connected to the surface of the annular cover;

[0015] An annular plate is fixedly connected to the surface of the lower mold at a position close to the bottom, and four gas springs are fixedly connected to the top of the annular plate, and the piston rod ends of the four gas springs are fixedly connected to the bottoms of the four connecting plates respectively;

[0016] The pressure detection unit includes a pressure sensor, which is fixedly embedded in the bottom of one of the connecting plates. The pressure-bearing end of the pressure sensor is fixedly connected to the piston rod end of the adjacent gas spring. The pressure sensor is used to detect the pressure condition of the gas spring.

[0017] Preferably, the heating system comprises two electric heating plates, which are respectively embedded in the bottom of the movable plate and the top of the lower plate, and are used to heat the upper mold and the lower mold.

[0018] Preferably, the air extraction storage mechanism comprises:

[0019] A storage shell, the storage shell is fixedly connected to the surface of the upper mold, an annular sealing plate is arranged on the inner wall of the storage shell, and the inner and outer ring walls of the annular sealing plate are both in sealing contact with the inner wall of the storage shell;

[0020] Two electric cylinders are symmetrically fixedly mounted on the top of the moving plate, and the piston rod ends of the two electric cylinders penetrate the moving plate and are fixedly connected to the top of the annular sealing plate;

[0021] Multiple groups of connecting tubes, the number of connecting tubes arranged is consistent with the number of exhaust holes, and are used to connect each exhaust hole with the interior of the storage shell. Two connecting tubes are arranged as a group, and one end of the two connecting tubes in the same group are fixedly connected to the inner wall of the corresponding exhaust hole, and the other ends of all the connecting tubes are fixedly connected to the bottom of the storage shell.

[0022] Preferably, the blocking mechanism comprises:

[0023] An outer toothed ring is rotatably connected to the surface of the upper mold, and a plurality of guide rails are provided through the top of the outer toothed ring in a circumferential array, the number of the guide rails is the same as the number of the exhaust holes, and the guide rails are connected by a first pulling opening, an arc opening, and a second pulling opening;

[0024] A plurality of sealing tubes are respectively inserted into the interior of the plurality of exhaust holes, the surface of each sealing tube is in sealing contact with the inner wall of the corresponding exhaust hole, a one-way valve is fixedly installed at the tube mouth of each sealing tube close to the interior of the upper mold, a sliding pin is rotatably connected to the surface of each sealing tube, the lower end of each sliding pin is respectively inserted into the interior of the adjacent guide rail, and the end of the sealing tube and the one-way valve close to the interior of the upper mold matches the curvature of the inner wall of the upper mold;

[0025] Two rotating drive components are arranged on the top of the lower plate and are respectively located on both sides of the lower mold. During the process of the upper mold moving downward for vulcanization, the two rotating drive components are linked to drive the outer gear ring to rotate.

[0026] Preferably, the rotary drive component comprises:

[0027] A mounting seat, fixedly connected to the surface of the storage shell, a rotating shaft is rotatably connected to the bottom of the mounting seat, a gear is fixedly connected to the surface of the rotating shaft, and the gear is meshed with the outer gear ring;

[0028] A torsion spring is sleeved on the surface of the rotating shaft, and two ends of the torsion spring are respectively fixedly connected to the bottom of the mounting seat and the top of the gear;

[0029] A driving pin rotatably connected to a surface of the rotating shaft at a position close to the bottom;

[0030] A fixed tube is fixedly connected to the top of the lower plate. A driving rail is provided on the inner wall of the fixed tube. The driving rail is used for inserting the driving pin. The driving rail is composed of an introduction groove, a spiral groove and a vertical groove.

[0031] A control method for a vulcanizing device for processing a rubber sheet, the control method comprising the following steps:

[0032] The pressure detection unit generates a first pressure information value at the moment when the pressure is detected;

[0033] The pressure detection unit sends the first pressure information value to the control unit to control the hydraulic cylinder to stop operating and the air pumping storage mechanism to perform an air pumping operation.

[0034] Preferably, the control process of the control unit includes:

[0035] The control unit receives the first pressure information value and generates first control information and second control information;

[0036] The control unit sends the first control information to the hydraulic cylinder to control the hydraulic cylinder to stop operating, and the stopping time is pre-set by a timer inside the control unit;

[0037] The control unit sends the second control information to the two electric cylinders, and the piston rods of the two electric cylinders drive the annular sealing plate to move upward to extract and store the air inside the mold after mold closing;

[0038] After the control unit detects that the stop time of the hydraulic cylinder reaches a preset time, it generates third control information and sends it to the hydraulic cylinder, restarts the hydraulic cylinder, and provides pressure for the vulcanization process through the piston rod of the hydraulic cylinder.

[0039] Preferably, the control method further comprises:

[0040] The pressure detection unit detects that the pressure reaches a preset pressure threshold and maintains it for a certain period of time before generating a second pressure information value. The maintenance time is preset by a timer inside the control unit.

[0041] The pressure detection unit sends the second pressure information to the control unit to control the operation of the hydraulic cylinder and the air extraction storage mechanism to perform the jet operation.

[0042] Preferably, the control process of the control unit also includes:

[0043] The control unit receives the second pressure information value and generates third control information and fourth control information;

[0044] The control unit first sends the third control information to the hydraulic cylinder, and then sends the fourth control information to the two electric cylinders. The piston rod of the hydraulic cylinder drives the upper mold to move upward with the help of the movable plate to realize the demolding operation. During the demolding process, the air stored in the vacuum storage mechanism is released through the exhaust hole to assist in demolding.

[0045] Compared with the prior art, the present invention has the following beneficial effects: when the upper mold contacts the top of the annular cover, the upper mold and the lower mold are closed, and as the upper mold continues to move downward, the annular cover will be driven downward and the elastic support will be compressed. The pressure detection unit will detect the pressure between the upper mold and the lower mold according to the compression amount of the elastic support. When the pressure detection unit senses the pressure, the control unit will first stop the operation of the hydraulic cylinder, and start the vacuum storage mechanism to vacuum the space between the upper mold and the lower mold, so as to reduce the retention of internal air, which is conducive to the vulcanization space being in an environment close to vacuum. After the hydraulic cylinder stops operating for a preset time, the control unit stops the operation of the vacuum storage mechanism and re-controls the piston rod of the hydraulic cylinder to continue to drive the moving plate downward, and synchronously links the blocking mechanism to block all the exhaust holes, which is conducive to avoiding the situation where the rubber generated by the vulcanization process flows into the exhaust hole. The elastic support is arranged to facilitate the upper mold to press the annular cover, thereby pressing the rubber waiting for vulcanization placed above the lower mold, and achieving the pressure required for vulcanization to ensure that the rubber product achieves the expected performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0047] Figure 2 Partial cross-section of the present invention Figure 1 ;

[0048] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0049] Figure 4 It is a partial cross-sectional view of the upper mold of the present invention;

[0050] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0051] Figure 6 This is a schematic diagram of the structure of the meshing of the outer gear ring and the gear of the present invention;

[0052] Figure 7 The fixed pipe structure of the present invention is shown in FIG. Figure 1 ;

[0053] Figure 8 The fixed pipe structure of the present invention is shown in FIG. Figure 2 ;

[0054] Fig. 9 The figure is a flow chart of the control method steps of the present invention.

[0055] In the figure: 1, vulcanizer; 2, upper plate; 3, lower plate; 4, moving plate; 5, hydraulic cylinder; 6, upper mold; 7, lower mold; 8, exhaust hole; 9, annular cover; 10, connecting plate; 11, gas spring; 12, storage shell; 13, annular sealing plate; 14, electric cylinder; 15, connecting pipe; 16, outer gear ring; 17, guide rail; 1701, first pulling port; 1702, arc port; 1703, second pulling port; 18, sealing tube; 19, one-way valve; 20, sliding pin; 21, rotating shaft; 22, gear; 23, torsion spring; 24, driving pin; 25, fixed tube; 26, driving rail; 2601, introduction groove; 2602, spiral groove; 2603, vertical groove; 27, annular plate. DETAILED DESCRIPTION

[0056] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0057] like Figures 1 to 8 The vulcanizing device for processing a rubber sheet shown in the figure comprises four fixed rods arranged between an upper plate 2 and a lower plate 3 of a vulcanizer 1, a movable plate 4 is slidably connected to the surfaces of the four fixed rods, a hydraulic cylinder 5 is fixedly installed on the top of the upper plate 2, and the end of the piston rod of the hydraulic cylinder 5 is fixedly connected to the top of the movable plate 4, and further comprises:

[0058] An upper mold 6 and a lower mold 7, wherein the upper mold 6 is fixedly mounted on the bottom of the movable plate 4, and the lower mold 7 is fixedly mounted on the top of the lower plate 3, and a plurality of exhaust holes 8 are provided on the surface of the upper mold 6 in a circumferential array;

[0059] The annular cover 9 is sleeved on the surface of the lower mold 7 through an elastic support member, and the inner wall of the annular cover 9 is in sealing contact with the surface of the lower mold 7;

[0060] A heating system, arranged inside the vulcanizer 1, for heating the upper mold 6 and the lower mold 7;

[0061] An air extraction and storage mechanism is provided on the surface of the upper mold 6 and is used to extract and store air during the vulcanization process;

[0062] A blocking mechanism is provided on the surface of the upper mold 6 and is used to block all the exhaust holes 8;

[0063] A pressure detection unit, used to detect the pressure between the upper mold 6 and the lower mold 7;

[0064] The control unit controls the operation of the vacuum storage mechanism and the blocking mechanism according to the pressure detection information of the pressure detection unit; the control unit can specifically adopt a controller, which can control the device in an external manner or be installed on the side wall of the vulcanizer 1. When working, the upper mold 6 and the lower mold 7 are preheated in advance by the heating system, and the rubber material to be vulcanized is placed at the center of the lower mold 7. The control unit starts the hydraulic cylinder 5, and the piston rod of the hydraulic cylinder 5 will push the movable plate 4 downward, and the downward movable plate 4 will drive the upper mold 6 to move downward. When the upper mold 6 contacts the top of the annular cover 9, the upper mold 6 and the lower mold 7 are closed. As the upper mold 6 continues to move downward, the annular cover 9 will be driven downward and the elastic support will be compressed. The pressure detection unit will detect the pressure between the upper mold 6 and the lower mold 7 according to the compression amount of the elastic support. When the pressure detection unit senses pressure, it will first stop the operation of the hydraulic cylinder 5 through the control unit, and start the vacuum storage mechanism to close the upper mold 6 and the lower mold 7. The space between the upper and lower molds is evacuated to reduce the retention of internal air, which is conducive to the vulcanization space being in an environment close to a vacuum. After the hydraulic cylinder 5 stops operating for a preset time, the control unit stops the operation of the vacuum storage mechanism and re-controls the piston rod of the hydraulic cylinder 5 to continue to drive the movable plate 4 downward, and synchronously links the blocking mechanism to block all the exhaust holes 8, which is conducive to preventing the rubber generated by the vulcanization process from flowing into the exhaust holes 8. The elastic support member is provided to facilitate the upper mold 6 to press the annular cover 9, thereby pressing the rubber placed on the lower mold 7 waiting for vulcanization, in order to provide the required pressure for vulcanization and ensure that the rubber products achieve the expected performance. During the compression of the elastic support member, the blocking mechanism will automatically be linked to complete the blocking to assist vulcanization first, and cancel the blocking after vulcanization is completed. During the demoulding process, the vacuum storage mechanism releases the internal stored airflow to assist the upper mold 6 in demoulding the vulcanized rubber. The heating system provided is convenient for providing heat for vulcanization.

[0065] As an embodiment of the present invention, the elastic support member includes:

[0066] Four connecting plates 10, all of which are fixedly connected to the surface of the annular cover 9;

[0067] The annular plate 27 is fixedly connected to the surface of the lower mold 7 at a position close to the bottom. Four gas springs 11 are fixedly connected to the top of the annular plate 27. The piston rod ends of the four gas springs 11 are fixedly connected to the bottoms of the four connecting plates 10 respectively.

[0068] The pressure detection unit includes a pressure sensor, which is fixedly embedded in the bottom of one of the connecting plates 10. The pressure-bearing end of the pressure sensor is fixedly connected to the piston rod end of the adjacent gas spring 11. The pressure sensor is used to detect the pressure condition of the gas spring 11. When working, the annular plate 27 is arranged to facilitate the installation of the gas spring 11. Through the arranged gas spring 11, it is convenient for the upper mold 6 to close the mold with the lower mold 7 with the help of the annular cover 9, and then push the annular cover 9 downward to compress the gas spring 11, thereby providing pressure for the rubber during the vulcanization process. The arranged pressure sensor is conducive to detecting the pressure in the vulcanization process through the compression amount of the gas spring 11.

[0069] As an embodiment of the present invention, the heating system includes two electric heating plates, which are respectively embedded in the bottom of the movable plate 4 and the top of the lower plate 3, and are used to heat the upper mold 6 and the lower mold 7; the embedding position of the two electric heating plates is located at the installation position of the upper mold 6 and the lower mold 7, so the upper mold 6 and the lower mold 7 can be heated by the two electric heating plates after the mold is closed, so as to facilitate the heating operation of the rubber during the vulcanization process. In order to provide temperature for rubber vulcanization, the specific temperature will be set in advance according to the rubber material.

[0070] As an embodiment of the present invention, the air extraction storage mechanism includes:

[0071] A storage shell 12, the storage shell 12 is fixedly connected to the surface of the upper mold 6, an annular sealing plate 13 is provided on the inner wall of the storage shell 12, and the inner and outer ring walls of the annular sealing plate 13 are both in sealing contact with the inner wall of the storage shell 12;

[0072] Two electric cylinders 14 are symmetrically fixedly mounted on the top of the moving plate 4. The piston rod ends of the two electric cylinders 14 penetrate the moving plate 4 and are fixedly connected to the top of the annular sealing plate 13.

[0073] Multiple groups of connecting tubes 15, the number of connecting tubes 15 is consistent with the number of exhaust holes 8, and are used to connect each exhaust hole 8 with the inside of the storage shell 12. Two connecting tubes 15 are set as one group, and one end of the two connecting tubes 15 in the same group is fixedly connected to the inner wall of the corresponding exhaust hole 8, and the other ends of all connecting tubes 15 are fixedly connected to the bottom of the storage shell 12; when working, the lower mold 7 moves down and contacts the top of the annular cover 9 and continues to move down. At the moment, the top of the annular cover 9 is pressed. After the pressure detection unit detects the pressure value of the gas spring 11, it will The control unit first controls the hydraulic cylinder 5 to stop pushing the movable plate 4 toward each other, and then controls the two electric cylinders 14 to operate. The piston rods of the two electric cylinders 14 will pull the annular sealing plate 13 upward. The upward annular sealing plate 13 is facilitated by the connecting pipe 15 to absorb the air inside the mold after mold closing into the storage shell 12, ensuring that the gas is discharged before the vulcanization press, reducing the generation of bubbles during the vulcanization process, and absorbing and storing the air after the vulcanization is completed. Then, it is released into the exhaust hole 8 through the connecting pipe 15, and then enters the upper mold 6, which is conducive to assisting the demolding of the vulcanized rubber.

[0074] As an embodiment of the present invention, the blocking mechanism includes:

[0075] The outer gear ring 16 is rotatably connected to the surface of the upper mold 6. The top of the outer gear ring 16 is provided with a plurality of guide rails 17 in a circumferential array. The number of the guide rails 17 is the same as the number of the exhaust holes 8. The guide rails 17 are connected by a first pulling opening 1701, an arc opening 1702 and a second pulling opening 1703.

[0076] A plurality of sealing tubes 18 are respectively inserted into the interior of the plurality of exhaust holes 8, the surface of each sealing tube 18 is in sealing contact with the inner wall of the corresponding exhaust hole 8, a one-way valve 19 is fixedly installed at the pipe opening of each sealing tube 18 close to the interior of the upper mold 6, a sliding pin 20 is rotatably connected to the surface of each sealing tube 18, the lower end of each sliding pin 20 is respectively inserted into the interior of the adjacent guide rail 17, and the end of the sealing tube 18 and the one-way valve 19 close to the interior of the upper mold 6 matches the curvature of the inner wall of the upper mold 6;

[0077] Two rotating drive components are arranged on the top of the lower plate 3, respectively located on both sides of the lower mold 7. During the process of the upper mold 6 moving downward for vulcanization, the two rotating drive components are linked to drive the outer gear ring 16 to rotate; during operation, the air inside the mold is discharged when the mold is closed through the connecting pipe 15 connected to the exhaust hole 8, but the flowing rubber during vulcanization can easily penetrate into the exhaust hole 8, thereby causing the exhaust hole 8 to be blocked, which not only affects the circulation of air flow, but also affects the shape of the rubber after vulcanization. The technical solution can solve the above problems. The specific implementation method is as follows: the piston rod of the hydraulic cylinder 5 will push the moving plate 4 to move downward, thereby driving the upper mold 6 to move downward, and the lower mold 7 moves downward to contact the annular cover 9 to realize the closing of the upper mold 6 and the lower mold 7. When the pressure detection unit senses the pressure value, the vacuum storage mechanism is used to store the pressure after the mold is closed. The air inside the mold is pumped to complete the discharge of air before vulcanization, reducing the retention of air during the vulcanization process. As the lower mold 7 continues to move downward to pressurize the annular cover 9, the linked rotating drive component drives the outer toothed ring 16 to rotate. The rotating outer toothed ring 16 first drives the sliding pin 20 to drive the sealing tube 18 to move into the exhaust hole 8 through the inner wall of the first pulling port 1701, thereby sealing the exhaust hole 8, which is beneficial to avoid the flow of rubber penetrating into the exhaust hole 8 in the middle of vulcanization, causing the exhaust hole 8 to be blocked. Since the end of the sealing tube 18 and the one-way valve 19 close to the inside of the upper mold 6 matches the curvature of the inner wall of the upper mold 6, the sealing tube 18 and the one-way valve 19 used to block the exhaust hole 8 will not affect the shape of the rubber vulcanization and will not cause the generation of burrs.

[0078] The arc-shaped opening 1702 is provided, when the outer gear ring 16 drives the arc-shaped opening 1702 to pass through the surface of the sliding pin 20, it is beneficial to maintain the sealing tube 18 blocking the exhaust hole 7. With the continuous rotation of the outer gear ring 16, in the later stage of vulcanization, the second pulling opening 1703 prompts the sliding pin 20 to drive the sealing tube 18 to move and reset along the exhaust hole 8, and cancels the blocking of the sealing tube 18 to the end of the connecting tube 15, so as to prepare for demoulding and jetting;

[0079] The rubber material itself may contain dissolved gas, such as nitrogen or air, which may be released during the vulcanization heating process. The one-way valve 19 is provided to facilitate the discharge of the released gas during the vulcanization process.

[0080] As an embodiment of the present invention, the rotary drive component includes:

[0081] A mounting seat is fixedly connected to the surface of the storage shell 12, a rotating shaft 21 is rotatably connected to the bottom of the mounting seat, a gear 22 is fixedly connected to the surface of the rotating shaft 21, and the gear 22 is meshed with the outer gear ring 16;

[0082] The torsion spring 23 is sleeved on the surface of the rotating shaft 21, and the two ends of the torsion spring 23 are respectively fixedly connected to the bottom of the mounting seat and the top of the gear 22;

[0083] A driving pin 24 is rotatably connected to a surface of the rotating shaft 21 at a position close to the bottom;

[0084] The fixed tube 25 is fixedly connected to the top of the lower plate 3. A driving rail 26 is provided on the inner wall of the fixed tube 25. The driving rail 26 is used for inserting the driving pin 24. The driving rail 26 is connected by an introduction groove 2601, a spiral groove 2602 and a vertical groove 2603. During operation, at the initial stage of vulcanization preparation, the upper mold 6 contacts the top of the annular cover 9, and the mold closing operation is realized between the upper mold 6 and the lower mold 7. The end of the driving pin 24 will be inserted into the introduction groove 2601 as the rotating shaft 21 moves downward. At this time, after the inside of the mold after mold closing is evacuated with the help of the vacuum storage mechanism, it is beneficial to actively discharge the air inside the mold after mold closing, and reduce the generation of bubbles during later vulcanization. As the upper mold 6 continues to move downward, the end of the driving pin 24 slides along the inside of the spiral groove 2602, thereby driving the rotating shaft 21 connected to the gear 22 to rotate, and driving the torsion spring 23 to twist. During the rotation of the gear 22, the outer gear ring 16 will be synchronously driven to rotate. The rubber inside the mold after mold closing is vulcanized by rotating to seal the exhaust hole 8. In the early stage of vulcanization, when the rubber inside has not completely melted and flowed, all the exhaust holes 8 are automatically sealed to prevent the rubber flowing in the middle stage of vulcanization from entering the exhaust hole 8. In the late stage of vulcanization, the vulcanized rubber gradually solidifies due to pressure and does not flow into the exhaust hole 8. The sealing tube 18 that originally temporarily seals the exhaust hole 8 is moved and reset, and the blocking of the end of the connecting tube 15 by the surface of the sealing tube 18 is cancelled. It is convenient to move the upper mold 6 upward to demould the vulcanized rubber after vulcanization. The air stored in the inflatable storage mechanism is sprayed into the upper mold 6 from the exhaust hole 8. With the impact force of the sprayed air, the demoulding between the vulcanized rubber and the upper mold 6 is automatically assisted to prevent the vulcanized rubber from sticking to the inner wall of the upper mold 6 as the upper mold 6 moves upward, thereby affecting the demoulding of the rubber.

[0085] The vertical groove 2603 is provided to provide space for the driving pin 24 to move up when the driving pin 24 moves up with the rotating shaft 21, which is conducive to the smooth upward movement of the driving pin 24 and the rotating shaft 21. After the driving pin 24 moves to the outside of the vertical groove 2603, the upper mold 6 is separated from the annular cover 9, and the twisted torsion spring 23 will rotate and reset, thereby driving the rotating shaft 21 connected to the driving pin 24 to rotate and reset, waiting for the next vulcanization operation.

[0086] like Fig. 9 A control method for a vulcanizing device for rubber sheet processing is shown, the control method comprising the following steps:

[0087] The pressure detection unit generates a first pressure information value at the moment when the pressure is detected;

[0088] The pressure detection unit sends the first pressure information value to the control unit to control the hydraulic cylinder 5 to stop operating and the air pumping storage mechanism to perform an air pumping operation.

[0089] As an embodiment of the present invention, the control process of the control unit includes:

[0090] The control unit receives the first pressure information value and generates first control information and second control information;

[0091] The control unit sends the first control information to the hydraulic cylinder 5 to control the hydraulic cylinder 5 to stop operating, and the stopping time is preset by the timer inside the control unit;

[0092] The control unit sends the second control information to the two electric cylinders 14, and the piston rods of the two electric cylinders 14 drive the annular sealing plate 13 to move upward to extract and store the air inside the mold after mold closing;

[0093] After the control unit detects that the stop time of the hydraulic cylinder 5 reaches a preset time, it generates third control information and sends it to the hydraulic cylinder 5, restarts the hydraulic cylinder 5, and provides pressure for the vulcanization process through the piston rod of the hydraulic cylinder 5.

[0094] As an embodiment of the present invention, the control method further includes:

[0095] The pressure detection unit detects that the pressure reaches a preset pressure threshold and maintains it for a certain period of time before generating a second pressure information value. The maintenance time is preset by a timer inside the control unit.

[0096] The pressure detection unit sends the second pressure information to the control unit to control the operation of the hydraulic cylinder 5 and the air extraction storage mechanism to perform the jetting operation.

[0097] As an implementation mode of the present invention, the control process of the control unit further includes:

[0098] The control unit receives the second pressure information value and generates third control information and fourth control information;

[0099] The control unit first sends the third control information to the hydraulic cylinder 5, and then sends the fourth control information to the two electric cylinders 14. The piston rod of the hydraulic cylinder 5 drives the upper mold 6 to move upward with the help of the movable plate 4 to realize the demolding operation, and during the demolding process, the air stored in the vacuum storage mechanism is released through the exhaust hole 8 to assist in demolding.

[0100] The working principle of the present invention is as follows: the upper mold 6 and the lower mold 7 are preheated in advance by the heating system, the rubber material to be vulcanized is placed at the center of the lower mold 7, the control unit starts the hydraulic cylinder 5, the piston rod of the hydraulic cylinder 5 will push the movable plate 4 downward, and the downward movable plate 4 will drive the upper mold 6 to move downward, and when the upper mold 6 contacts the top of the annular cover 9, the upper mold 6 and the lower mold 7 are molded together, as the upper mold 6 continues to move downward, it will drive the annular cover 9 to move downward and compress the elastic support member, the pressure detection unit will detect the pressure between the upper mold 6 and the lower mold 7 according to the compression amount of the elastic support member, when the pressure detection unit senses the pressure, it will first stop the operation of the hydraulic cylinder 5 through the control unit, and start the vacuum storage mechanism to vacuum the space between the upper mold 6 and the lower mold 7, so as to reduce the retention of internal air, which is beneficial to the vulcanization space. In an environment close to a vacuum, after the hydraulic cylinder 5 stops operating for a preset time, the control unit stops the operation of the vacuum storage mechanism and re-controls the piston rod of the hydraulic cylinder 5 to continue to drive the movable plate 4 downward, and synchronously links the blocking mechanism to block all the exhaust holes 8, which is beneficial to prevent the rubber generated by the vulcanization process from flowing into the exhaust holes 8. The elastic support member is provided to facilitate the upper mold 6 to press the annular cover 9, thereby pressing the rubber placed on the lower mold 7 waiting for vulcanization, in order to provide the required pressure for vulcanization and ensure that the rubber products achieve the expected performance. During the compression of the elastic support member, the blocking mechanism will automatically be linked to complete the sealing and auxiliary vulcanization first, and cancel the sealing after the vulcanization is completed. During the demolding process, the vacuum storage mechanism releases the internally stored airflow to assist the upper mold 6 in demolding the vulcanized rubber.

[0101] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A vulcanizing device for processing rubber sheets, comprising four fixed rods arranged between an upper plate (2) and a lower plate (3) of a vulcanizer (1), a movable plate (4) being slidably connected to the surfaces of the four fixed rods, a hydraulic cylinder (5) being fixedly mounted on the top of the upper plate (2), the piston rod end of the hydraulic cylinder (5) being fixedly connected to the top of the movable plate (4), characterized in that: Also includes: an upper mold (6) and a lower mold (7), wherein the upper mold (6) is fixedly mounted on the bottom of the movable plate (4), and the lower mold (7) is fixedly mounted on the top of the lower plate (3), and a plurality of exhaust holes (8) are provided on the surface of the upper mold (6) in a circumferential array; An annular cover (9) is sleeved on the surface of the lower mold (7) via an elastic support member, and the inner wall of the annular cover (9) is in sealing contact with the surface of the lower mold (7); A heating system, arranged inside the vulcanizer (1), for heating the upper mold (6) and the lower mold (7); An air extraction and storage mechanism, arranged on the surface of the upper mold (6) and used for extracting and storing air during the vulcanization process; A blocking mechanism, arranged on the surface of the upper mold (6) and used for blocking all the exhaust holes (8); A pressure detection unit, used to detect the pressure between the upper mold (6) and the lower mold (7); The control unit controls the air extraction storage mechanism and the blocking mechanism to operate according to the pressure detection information of the pressure detection unit; The air extraction storage mechanism comprises: A storage shell (12), the storage shell (12) being fixedly connected to a surface of the upper mold (6); The blocking mechanism comprises: An outer toothed ring (16) is rotatably connected to the surface of the upper mold (6), and a plurality of guide rails (17) are provided through the top of the outer toothed ring (16) in a circular array, wherein the number of the guide rails (17) is the same as the number of the exhaust holes (8), and the guide rails (17) are connected to form a first pulling opening (1701), an arc opening (1702) and a second pulling opening (1703); A plurality of sealing tubes (18) are respectively inserted into the interior of the plurality of exhaust holes (8), the surface of each sealing tube (18) is in sealing contact with the inner wall of the corresponding exhaust hole (8), a one-way valve (19) is fixedly installed at the tube mouth of each sealing tube (18) close to the interior of the upper mold (6), a sliding pin (20) is rotatably connected to the surface of each sealing tube (18), the lower end of each sliding pin (20) is respectively inserted into the interior of the adjacent guide rail (17), and the end of the sealing tube (18) and the one-way valve (19) close to the interior of the upper mold (6) matches the curvature of the inner wall of the upper mold (6); Two rotating drive components are arranged on the top of the lower plate (3) and are respectively located on both sides of the lower mold (7). When the upper mold (6) moves downward for vulcanization, the two rotating drive components are linked to drive the outer gear ring (16) to rotate; The rotary drive component comprises: A mounting seat, fixedly connected to the surface of the storage shell (12), a rotating shaft (21) being rotatably connected to the bottom of the mounting seat, a gear (22) being fixedly connected to the surface of the rotating shaft (21), and the gear (22) and the outer gear ring (16) being meshed with each other; A torsion spring (23) is sleeved on the surface of the rotating shaft (21), and two ends of the torsion spring (23) are respectively fixedly connected to the bottom of the mounting seat and the top of the gear (22); A driving pin (24) rotatably connected to a surface of the rotating shaft (21) at a position close to the bottom; A fixed tube (25) is fixedly connected to the top of the lower plate (3); a driving rail (26) is provided on the inner wall of the fixed tube (25); the driving rail (26) is used for inserting the driving pin (24); the driving rail (26) is composed of an introduction groove (2601), a spiral groove (2602) and a vertical groove (2603) connected to each other.

2. A vulcanizing device for rubber sheet processing according to claim 1, characterized in that: The elastic support member comprises: Four connecting plates (10), each of the four connecting plates (10) being fixedly connected to the surface of the annular cover (9); An annular plate (27) is fixedly connected to the surface of the lower mold (7) at a position close to the bottom, and four gas springs (11) are fixedly connected to the top of the annular plate (27), and the piston rod ends of the four gas springs (11) are respectively fixedly connected to the bottoms of the four connecting plates (10).

3. A vulcanizing device for rubber sheet processing according to claim 2, characterized in that: The pressure detection unit comprises a pressure sensor, which is fixedly embedded in the bottom of one of the connecting plates (10), and the pressure-bearing end of the pressure sensor is fixedly connected to the piston rod end of the adjacent gas spring (11), and the pressure sensor is used to detect the pressure condition of the gas spring (11).

4. A vulcanizing device for rubber sheet processing according to claim 1, characterized in that: The air extraction storage mechanism also includes: An annular sealing plate (13) is provided on the inner wall of the storage shell (12), and the inner and outer ring walls of the annular sealing plate (13) are both in sealing contact with the inner wall of the storage shell (12); Two electric cylinders (14) are symmetrically fixedly mounted on the top of the moving plate (4), and the piston rod ends of the two electric cylinders (14) penetrate the moving plate (4) and are fixedly connected to the top of the annular sealing plate (13); A plurality of groups of connecting tubes (15), wherein the number of groups of the connecting tubes (15) is consistent with the number of exhaust holes (8), and are used to connect each exhaust hole (8) with the interior of the storage shell (12); two connecting tubes (15) are arranged as a group, one end of the two connecting tubes (15) in the same group are fixedly connected to the inner wall of the corresponding exhaust hole (8), and the other ends of all the connecting tubes (15) are fixedly connected to the bottom of the storage shell (12).

5. A control method for a vulcanizing device for processing a rubber sheet, which is adopted in the vulcanizing device for processing a rubber sheet as claimed in claim 4, characterized in that: The control method comprises the following steps: The pressure detection unit generates a first pressure information value at the moment when the pressure is detected; The pressure detection unit sends the first pressure information value to the control unit to control the hydraulic cylinder (5) to stop operating and the air pumping storage mechanism to perform an air pumping operation.

6. The control method of a vulcanizing device for rubber sheet processing according to claim 5, characterized in that: The control process of the control unit includes: The control unit receives the first pressure information value and generates first control information and second control information; The control unit sends the first control information to the hydraulic cylinder (5) to control the hydraulic cylinder (5) to stop operating, and the time of stopping operation is preset by a timer inside the control unit; The control unit sends the second control information to the two electric cylinders (14), and the piston rods of the two electric cylinders (14) drive the annular sealing plate (13) to move upward, thereby extracting and storing the air inside the mold after the mold is closed; After the control unit detects that the stop time of the hydraulic cylinder (5) reaches a preset time, it generates third control information and sends it to the hydraulic cylinder (5), restarts the hydraulic cylinder (5), and provides pressure for the vulcanization process through the piston rod of the hydraulic cylinder (5).

7. The control method of a vulcanizing device for rubber sheet processing according to claim 5, characterized in that: The control method also includes: The pressure detection unit detects that the pressure reaches a preset pressure threshold and maintains it for a certain period of time before generating a second pressure information value. The maintenance time is preset by a timer inside the control unit. The pressure detection unit sends the second pressure information to the control unit to control the operation of the hydraulic cylinder (5) and the air extraction storage mechanism to perform an air injection operation.

8. The control method of a vulcanizing device for rubber sheet processing according to claim 7, characterized in that: The control process of the control unit also includes: The control unit receives the second pressure information value and generates third control information and fourth control information; The control unit first sends the third control information to the hydraulic cylinder (5), and then sends the fourth control information to the two electric cylinders (14), so that the piston rod of the hydraulic cylinder (5) drives the upper mold (6) to move upward with the help of the movable plate (4) to realize the demoulding operation, and during the demoulding process, the air stored in the air extraction storage mechanism is released through the exhaust hole (8) to assist the demoulding.

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