A double vacuum flat press

Abstract

The present application relates to the technical field of flat vulcanizing machine, provide a kind of doublet vacuum flat vulcanizing machine, including two interval settings first vulcanizing machine and second vulcanizing machine, and setting between the stripping unit and control cabinet.Stripping unit includes base frame, drive part, vibrating device and pusher device.Drive part is installed on base frame, and its power output end is respectively connected with vibrating device and pusher device transmission.Drive part and second vulcanizing machine all include lower mould body, stripper plate, stripper plate is compatible with the shape of lower mould body cavity bottom, and in the mould state with lower mould body jointly constitutes mould cavity bottom surface.Pusher device includes transmission mechanism and pusher plate.Transmission mechanism drives pusher plate to reciprocate up and down while vibrating device movement makes lower mould body vibrate, first vulcanizing machine and second vulcanizing machine are also provided with limiting assembly, limiting assembly is used to limit the horizontal displacement of lower mould body when vibrating device works.The present application carries out stripping operation after vulcanization quickly, improves production efficiency.

Description

Technical Field

[0001] This invention relates to the field of flat vulcanizing machine technology, and in particular to a double-vacuum flat vulcanizing machine. Background Technology

[0002] Flat vulcanizing machines are core equipment for the vulcanization and molding of polymer materials such as rubber and silicone. Among them, double-unit vacuum flat vulcanizing machines are widely used in mass production scenarios because they can achieve continuous operation and improve production efficiency. Most existing double-unit vacuum flat vulcanizing machines adopt two independent vulcanization units set up in parallel. The two units lack a coordinated unloading and feeding structure, and the unloading of finished products mostly rely on manual labor.

[0003] In actual production, rubber products such as sealing strips and gaskets often adhere tightly to the mold cavity surface after vulcanization. Due to the combined effects of product shrinkage and vacuum adsorption, demolding resistance is relatively high. Traditional demolding methods often use ejector pins for direct ejection, but the product shrinks in volume after vulcanization and cooling, generating radial clamping force on the mold core or mold cavity wall. In addition, during vulcanization, gas between the product and the mold cavity is expelled, forming local vacuum or negative pressure areas, further increasing the difficulty of demolding.

[0004] Especially for long or thin-walled products, the ejection method using a push rod can easily cause uneven stress, leading to product deformation or localized damage. A more common practice is to manually pry or peel the material using tools such as thin blades. This method is very prone to problems such as blank misalignment, incomplete stripping, and scratches on the finished product, affecting the quality of the product molding. Summary of the Invention

[0005] In view of this, the present invention aims to propose a double-vacuum flat vulcanizing machine, which can meet the high-efficiency production requirements of the double-vacuum flat vulcanizing machine, automatically and quickly perform the unloading operation of the vulcanized products, and improve production efficiency.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A double-unit vacuum flat vulcanizing machine includes two vulcanizing machines, a first vulcanizing machine and a second vulcanizing machine, spaced apart, and a desizing unit and a control cabinet disposed between the two. The desizing unit includes a base frame, a drive unit, a vibration device and a pushing device. The drive unit is mounted on the base frame, and its power output end is respectively connected to the vibration device and the pushing device. Both the first vulcanizing machine and the second vulcanizing machine include a lower mold body. The lower mold body is provided with a release plate that can move up and down. The release plate is adapted to the shape of the bottom of the mold cavity of the lower mold body and together with the lower mold body to form the bottom surface of the mold cavity in the mold-closed state. The jacking device includes a transmission mechanism connected to the power output end of the drive unit, and a jacking plate disposed at the lower end of the demolding plate. The transmission mechanism is used to drive the push plate to move up and down reciprocally, while the vibration device moves to make the lower mold body vibrate. The first vulcanizing machine and the second vulcanizing machine are also provided with limiting components, which are used to limit the horizontal displacement of the lower mold body when the vibration device is working.

[0007] Furthermore, the two drive units are mounted on the base frame, and the two sets of vibration devices and the pushing device are respectively located below the lower mold body of the first vulcanizing machine and the second vulcanizing machine.

[0008] Furthermore, the first vulcanizing machine includes a first hydraulic cylinder for driving the lower mold body to move up and down, and a first support column connected to the power output end of the first hydraulic cylinder. The limiting component includes a U-shaped tube connected above the first support column, and two U-shaped tubes are arranged opposite each other on both sides of the lower mold body along the length direction of the mold body; The U-shaped tube is also equipped with a second hydraulic cylinder, the power output end of which is connected to a limit shaft, and the two limit shafts are arranged opposite to each other on both sides of the lower mold body along the width direction.

[0009] Furthermore, the transmission mechanism includes a first rotating shaft disposed on the base frame, a double pulley pivotally connected to the first rotating shaft, a first transmission wheel connected to one end of the first rotating shaft, and a first adjustment component connected to the first transmission wheel; A first pulley is provided between the double pulley and the drive unit; A connecting frame is slidably connected to the base frame, and the connecting frame has a first extension shaft at both ends. The base frame has a receiving groove to accommodate the sliding of the first extension shaft. The push plate is located above the connecting frame near the lower mold body. When the first rotating shaft rotates, the first adjusting component drives the connecting frame to reciprocate in the height direction relative to the base frame.

[0010] Furthermore, the base frame is also provided with a second pivotally connected shaft, on which a second transmission wheel is sleeved, and the second transmission wheel is connected to the first transmission wheel by a belt drive. The second rotating shaft has a second adjustment component and a third adjustment component respectively arranged opposite to each other on both sides. The connecting frame has a second extension shaft corresponding to the second adjustment component and a third extension shaft corresponding to the third adjustment component. The second and third adjustment components have the same structure as the first adjustment component.

[0011] Furthermore, the first adjustment component includes a rectangular block fixedly connected to the first transmission wheel, a turntable slidably connected along the length of the rectangular block, the turntable having a recessed annular groove formed thereon, and the rectangular block having a locking member for limiting the sliding of the turntable, the locking position of the locking member limiting the eccentric distance of the turntable relative to the first transmission wheel. The connecting frame is also provided with a guide plate, and the guide plate is provided with a protruding post. The post is located in the annular groove. When the first transmission wheel rotates, the post drives the connecting frame to move up and down with the rotation of the turntable.

[0012] Furthermore, a dovetail groove is formed on the rectangular block, extending along its length, and an insert block is formed on the turntable to fit the dovetail groove, the insert block being inserted into the dovetail groove. The locking component is a screw fixedly connected to the rectangular block. The screw is screwed to the insert block. When the screw is rotated, the insert block moves relative to the length of the rectangular block to adjust the eccentric distance between the turntable and the first transmission wheel.

[0013] Furthermore, the base frame includes several columns disposed on the outside of the connecting frame, the receiving groove is formed on the columns, two first extension shafts are respectively disposed at the tail end of the connecting frame, and the second extension shaft and the third extension shaft are disposed opposite to each other in the middle of the connecting frame.

[0014] Furthermore, the vibration device includes a third rotating shaft, a vibrating disk, and a support roller; The third rotating shaft is pivotally connected to the base frame, and a third transmission wheel is provided at one end. The third transmission wheel is connected to the double pulley of the drive unit via a belt. The two vibratory discs are respectively sleeved and fixed at both ends of the third rotating shaft, and the support rollers are respectively fixed between the two vibratory discs. The outer edge of each vibratory disc is alternately formed with an outwardly protruding convex arc segment and an inwardly concave arc segment along the circumferential direction. The support roller is located below the lower mold body. When the drive unit drives the third rotating shaft to rotate, the support roller rotates with the vibrating plate and contacts and separates from the bottom of the lower mold body in sequence, thereby causing the lower mold body to vibrate up and down.

[0015] Compared with the prior art, the present invention has the following advantages: The double-unit vacuum flat vulcanizing machine of this invention, by setting a corresponding stripping unit between the two flat vulcanizing machines and using a vibration device to vibrate the lower mold body at a uniform speed, can effectively solve the problem of product adhesion caused by negative pressure adsorption and reduce demolding resistance. At the same time, the push device uses a pusher device to repeatedly eject the finished product as a whole, avoiding deformation caused by pulling the not-yet-fully-solidified finished product during a single ejection, which can lead to scratches, incomplete stripping, and other problems. It is particularly suitable for the stripping needs of long strips and thin-walled rubber products, and can meet the high-efficiency production requirements of the double-unit vacuum flat vulcanizing machine. It automatically and quickly performs stripping operations of vulcanized products, maintaining high production efficiency and significantly improving product molding quality. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a front view schematic diagram of the double-vacuum flat vulcanizing machine according to an embodiment of the present invention; Figure 2 This is a first-view perspective perspective of the double-vacuum flat vulcanizing machine described in an embodiment of the present invention; Figure 3 This is a second perspective perspective view of the double-vacuum flat vulcanizing machine described in an embodiment of the present invention; Figure 4 This is a three-dimensional schematic diagram of the first vulcanizing machine according to an embodiment of the present invention; Figure 5 This is a first-view perspective perspective of a portion of the unloading unit described in an embodiment of the present invention; Figure 6 This is a second-view perspective perspective of a partial unloading unit described in an embodiment of the present invention; Figure 7 This is a schematic diagram showing the connection between the first adjusting component, the first rotating shaft, and the double pulley according to an embodiment of the present invention; Figure 8 This is a three-dimensional schematic diagram of the first adjustment component according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. First vulcanizing machine; 2. Second vulcanizing machine; 3. Descrambling unit; 4. Control cabinet; 5. Lower mold body; 6. Limiting components; 32. Base frame; 33. Drive unit; 34. Vibration device; 35. Pushing device; Template removal; U-shaped tube; 62. Second hydraulic cylinder; 63. Limiting shaft; Columns; 332. Third rotating shaft; 333. Vibratory plate; 334. Support roller; 335. Third transmission wheel; 342. First rotating shaft; 343. Double pulley; 344. First transmission wheel; 345. First adjusting assembly; 346. First pulley; 347. Second transmission wheel; 348. Locking element; 349. Third adjusting assembly; 350. Push plate; 351. Connecting frame; 352. First extension shaft; 353. Second extension shaft; 354. Third extension shaft; 355. Guide plate; 356. Protruding column; 357. Rectangular block; 358. Turntable; Convex arc segment; 3322, concave arc segment. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] This embodiment relates to a double-stage vacuum flat vulcanizing machine, which, as a whole, is as follows: Figures 1 to 3 As shown, the system includes two vulcanizing machines, a first vulcanizing machine 1 and a second vulcanizing machine 2, spaced apart, and a desizing unit 3 and a control cabinet 4 disposed between them. The desizing unit 3 includes a base frame 31, a drive unit 32, a vibration device 33, and a pushing device 34. The drive unit 32 is mounted on the base frame 31, and its power output end is connected to the vibration device 33 and the pushing device 34 respectively.

[0023] Both the first vulcanizing machine 1 and the second vulcanizing machine 2 include a lower mold body 5. The lower mold body 5 is equipped with a vertically movable ejector plate 51. The ejector plate 51 is adapted to the shape of the bottom of the mold cavity of the lower mold body 5 and, in the closed state, forms the bottom surface of the mold cavity together with the lower mold body 5. The pusher device 34 includes a transmission mechanism connected to the power output end of the drive unit 32, and a pusher plate 350 located at the lower end of the ejector plate 51. The transmission mechanism drives the pusher plate 350 to move up and down reciprocally while the vibration device 33 moves to vibrate the lower mold body 5. The first vulcanizing machine 1 and the second vulcanizing machine 2 are also equipped with a limiting component 6, which limits the horizontal displacement of the lower mold body 5 when the vibration device 33 is working.

[0024] Based on the above design concept, the double-vacuum flat vulcanizing machine of this embodiment, by setting a corresponding stripping unit 3 between the two flat vulcanizing machines and using a vibration device 33 to vibrate the lower mold body 5 at a uniform speed, can effectively solve the problem of product adhesion caused by negative pressure adsorption and reduce demolding resistance. At the same time, the pusher device 34 is used to repeatedly eject the finished product as a whole, avoiding deformation caused by pulling the not-yet-fully-solidified finished product during a single ejection, which would cause scratches on the finished product and incomplete stripping. It is especially suitable for the stripping needs of long strips and thin-walled rubber products, and can meet the high-efficiency production needs of the double-vacuum flat vulcanizing machine. It automatically and quickly performs stripping operations of vulcanized products, maintaining high production efficiency and significantly improving product molding quality.

[0025] Based on the above overall introduction, as an example structure, such as Figures 1 to 3 As shown, the double-vacuum flat vulcanizing machine of this embodiment is mainly used for vulcanizing and molding rubber products such as sealing strips and gaskets, and is especially suitable for long strip-shaped and thin-walled rubber products. The basic components of the vulcanizing machine include two vulcanizing machines 1 and 2 arranged at intervals, a stripping unit 3 and a control cabinet 4 arranged between the two, and various power sources that provide power to each component. The various power sources are respectively installed at each execution component to provide power support for the operation of the equipment.

[0026] like Figures 1 to 2 As shown, the equipment has a linear layout. The front of each vulcanizing machine is near the operator, and this station is a shared station for loading the billet and unloading the finished product. The unloading unit 3 is fixedly installed directly below this station, corresponding to the mold position of the loading station, ensuring that the unloading unit 3 can quickly complete the unloading operation after the vulcanized mold moves to this station. The middle vulcanizing station is located behind the loading station and is aligned in a straight line with the loading station. The first vulcanizing machine 1 and the second vulcanizing machine 2 are arranged in parallel at the vulcanizing station, and the distance between them is adapted to the width of the loading station, which can realize the smooth movement of the mold between the vulcanizing station and the loading station.

[0027] In addition, both the first vulcanizing machine 1 and the second vulcanizing machine 2 include a lower mold body 5, an upper mold body, a vacuum system, and a heating system, used to complete the heating, vacuuming, and vulcanization molding of the blank. The control cabinet 4 is equipped with a PLC controller, which is electrically connected to each power source, vacuum system, and heating system, used to control the operation of the entire equipment, automating the transfer, vulcanization, and desizing operations, replacing manual operation, and further improving production efficiency and product quality.

[0028] Specifically, the upper mold body is connected to the equipment frame via a tilting bracket and is equipped with a tilting cylinder and an upper mold lifting cylinder. The two cylinders work together to adjust the height and tilting angle of the upper mold body. The upper mold lifting cylinder is vertically mounted above the tilting bracket, and its power output end is connected to the top of the upper mold body. The height of the upper mold body can be adjusted by extending and retracting the cylinder to meet the mold closing requirements of blanks of different thicknesses.

[0029] The lower mold body 5 is installed on the transfer base. A lower mold lifting cylinder is provided on the base of the vulcanizing machine. The lower mold lifting cylinder is vertically installed between the transfer base and the lower mold body 5. The height of the lower mold body 5 can be adjusted by extending and retracting the cylinder. It works in coordination with the height adjustment of the upper mold body to ensure the alignment accuracy of the mold cavity. At the same time, it can adapt to the vulcanization requirements of blanks of different thicknesses and avoid deformation caused by uneven stress on the blanks.

[0030] In this embodiment, the lower mold body 5 is provided with a vertically movable ejector plate 51. The lower mold cavity in this embodiment is annular, and the ejector plate 51 is adapted to the shape of the bottom of the mold cavity of the lower mold body 5. It is an annular plate structure embedded in the lower mold body 5 so that it can form the bottom surface of the mold cavity together with the lower mold body 5 when the mold is closed, without affecting the vulcanization molding accuracy of the blank. Correspondingly, the push plate 350 is formed into an upwardly convex annular shape. When pushing, the ejector plate 51 can drive the finished product at the bottom of the entire mold cavity to be ejected synchronously.

[0031] As a preferred embodiment, such as Figures 1 to 3 As shown, two drive units 32 are mounted on the base frame 31, and two sets of vibration devices 33 and pushing devices 34 are respectively located below the lower mold body 5 of the first vulcanizing machine 1 and the second vulcanizing machine 2. This enables independent material removal and shaking control of the two vulcanizing units, and the material removal and shaking sequence of each unit can be flexibly adjusted according to the operating status of the two vulcanizing units, making it suitable for the production of products of multiple specifications and batches.

[0032] like Figure 4As shown, the first vulcanizing machine 1 includes a first hydraulic cylinder for driving the lower mold body 5 to move up and down, and a first support column connected to the power output end of the first hydraulic cylinder. The limiting assembly 6 includes a U-shaped tube 61 connected above the first support column, with two U-shaped tubes 61 arranged opposite to each other on both sides of the lower mold body 5 along its length. A second hydraulic cylinder 62 is also provided on the U-shaped tube 61, with the power output end of the second hydraulic cylinder 62 connected to a limiting shaft 63. The two limiting shafts 63 are arranged opposite to each other on both sides of the lower mold body 5 along its width, forming an all-round limiting fixation, which can effectively limit the horizontal displacement of the lower mold body 5 during vibration.

[0033] Preferably, such as Figures 5 to 7 As shown, the transmission mechanism includes a first rotating shaft 341 mounted on a base frame 31, a double pulley 342 pivotally connected to the first rotating shaft 341, a first transmission wheel 343 connected to one end of the first rotating shaft 341, and a first adjusting assembly 344 connected to the first transmission wheel 343. A first pulley 345 is provided between the double pulley 342 and the drive unit 32. A connecting frame 351 is slidably connected to the base frame 31, with first extension shafts 352 at both ends of the connecting frame 351. The base frame 31 has receiving grooves to accommodate the sliding of the first extension shafts 352. A push plate 350 is positioned above the end of the connecting frame 351 near the lower mold body 5. When the first rotating shaft 341 rotates, the first adjusting assembly 344 drives the connecting frame 351 to reciprocate in the height direction relative to the base frame 31.

[0034] In this embodiment, the drive unit 32 is a servo motor. The drive unit 32 drives the double pulley 342 to rotate, which in turn drives the first rotating shaft 341 to rotate. The first transmission wheel 343 and the first adjustment component 344 realize the up-and-down reciprocating movement of the connecting frame 351 and the push plate 350, which can achieve slow and stable pushing.

[0035] Furthermore, for smoother unloading, the base frame 31 is also equipped with a pivotally connected second rotating shaft 346. A second transmission wheel 347 is fitted onto the second rotating shaft 346, and the second transmission wheel 347 is connected to the first transmission wheel 343 via a belt drive. A second adjusting component and a third adjusting component 349 are respectively provided on both sides of the second rotating shaft 346. The connecting frame 351 is equipped with a second extension shaft 353 corresponding to the second adjusting component, and a third extension shaft 354 corresponding to the third adjusting component 349. The structures of the second and third adjusting components 349 are the same as those of the first adjusting component 344. This arrangement ensures that both ends and the middle of the connecting frame 351 receive uniform driving force, preventing tilting or jamming during the vertical movement of the connecting frame 351.

[0036] As a preferred embodiment, such as Figures 5 to 7As shown, the first adjustment assembly 344 includes a rectangular block 357 fixedly connected to the first transmission wheel 343, and a turntable 358 slidably connected along the length of the rectangular block 357. The turntable 358 has a recessed annular groove. The rectangular block 357 is provided with a locking member 348 for limiting the sliding of the turntable 358. The locking position of the locking member 348 limits the eccentric distance of the turntable 358 relative to the first transmission wheel 343. The connecting frame 351 is also provided with a guide plate 355. The guide plate 355 has a protruding post 356, which is located in the annular groove. When the first transmission wheel 343 rotates, the post 356 drives the connecting frame 351 to move up and down as the turntable 358 rotates.

[0037] Furthermore, such as Figures 7 to 8 As shown, a dovetail groove is formed on the rectangular block 357, extending along its length. A matching insert is formed on the turntable 358, and the insert is inserted into the dovetail groove. The locking element 348 is a screw fixedly connected to the rectangular block 357, and the screw is threaded to the insert. When the screw is rotated, the insert moves relative to the length of the rectangular block 357, thereby adjusting the eccentricity between the turntable 358 and the first transmission wheel 343. The locking element 348 uses a screw structure and is threaded to the insert. The position of the insert can be adjusted by rotating the screw, thereby adjusting the eccentricity between the turntable 358 and the first transmission wheel 343. This eliminates the need to disassemble parts, reducing operational difficulty and improving adjustment efficiency.

[0038] In addition, such as Figures 5 to 6 As shown, the base frame 31 includes several columns 311 located on the outside of the connecting frame 351, a receiving groove is formed on the column 311, two first extension shafts 352 are respectively located at the tail end of the connecting frame 351, and the second extension shaft 353 and the third extension shaft 354 are arranged opposite to each other in the middle of the connecting frame 351.

[0039] As a preferred embodiment, such as Figures 5 to 6 As shown, the vibration device 33 includes a third rotating shaft 331, a vibrating disc 332, and a support roller 333. The third rotating shaft 331 is pivotally connected to the base frame 31, and a third transmission wheel 334 is provided at one end. The third transmission wheel 334 is connected to the double pulley 342 of the drive unit 32 via a belt. Two vibrating discs 332 are respectively sleeved and fixed at both ends of the third rotating shaft 331, and the support roller 333 is respectively fixed between the two vibrating discs 332. The outer edge of each vibrating disc 332 alternately forms an outwardly protruding convex arc segment 3321 and an inwardly concave arc segment 3322 along the circumferential direction. The support roller 333 is located below the lower mold body 5. When the drive unit 32 drives the third rotating shaft 331 to rotate, the support roller 333 rotates with the vibrating disc 332 and sequentially contacts and separates from the bottom of the lower mold body 5, thereby causing the lower mold body 5 to vibrate up and down.

[0040] like Figures 5 to 6As shown, the convex arc segment 3321 and concave arc segment 3322 on the outer edge of the vibratory feeder 332 are alternately arranged. The vibration amplitude and frequency can be flexibly adjusted by adjusting the rotation speed of the drive unit 32 to adapt to the material shaking and unloading needs of rubber sealing strips of different materials and hardnesses, and gaskets of different thicknesses. For products with high demolding resistance, the vibration amplitude can be appropriately increased to completely break the negative pressure adsorption and shrinkage clamping force. For thin-walled and easily deformable products, the vibration amplitude can be reduced to avoid damage to the finished product, while ensuring that the air inside the blank is completely discharged, thus improving the vulcanization quality.

[0041] The working process of the double-vacuum flat vulcanizing machine in this embodiment is as follows: S1, the control cabinet 4 controls the upper mold body to flip and the upper and lower mold bodies 5 to rise and fall, adjusting the lower mold body 5 to the preset feeding height of the front feeding station; the operator puts the blank to be vulcanized into the mold cavity of the lower mold body 5 at the front feeding station, ensuring that the blank is placed neatly and no foreign matter is mixed in, and that the release mold 51 fits against the bottom of the blank, especially for long strip blanks, to ensure that the blank and the mold cavity are accurately aligned to avoid misalignment after vulcanization, thus completing the material preparation before starting the machine.

[0042] S2, after the material loading is completed, the control cabinet 4 controls the tilting cylinder to reset, driving the upper mold body to tilt to a horizontal position. Simultaneously, it controls the extension and retraction of the upper mold lifting cylinder to adjust the upper mold body to the preset mold closing height. Then, the limit component 6 releases its initial limit, the transfer cylinder starts, and the lower mold body 5 and the upper mold body move backward along a straight track, smoothly transferring from the front loading station to the corresponding vulcanizing unit in the middle vulcanizing station. After the mold body is in place, the control cabinet 4 controls the second cylinder 62 to start, driving the limit shaft 63 to extend. The limit shaft 63 at the rear end abuts against the side of the lower mold body 5, limiting the horizontal displacement of the lower mold body 5 and preventing mold cavity displacement during vulcanization. At the same time, the mold body alignment accuracy is checked; after confirmation that it is correct, the mold closing vulcanization stage begins.

[0043] S3: The pressure cylinder is activated, applying a preset pressure from above to firmly press the upper mold body onto the lower mold body 5, ensuring mold sealing and preventing vacuum leakage. After mold closing and pressurization are in place, the system automatically activates the vacuum system to vacuum the mold cavity. After vacuuming, the heating system continues to operate, heating the blank at the preset temperature while simultaneously starting the vulcanization timer. During vulcanization, the control system monitors the platen temperature, vacuum level, and mold closing pressure in real time, automatically adjusting and correcting any parameter deviations.

[0044] S4. After the preset vulcanization time is reached, vulcanization is complete, and the system automatically stops heating, maintaining a vacuum state for 1-2 minutes. Then, the vacuum is slowly released, and the pressure cylinder is depressurized. After depressurization, the mold is opened, and the mold body is transferred to the front-end loading station for unloading.

[0045] S5, the control cabinet 4 controls the second hydraulic cylinder 62 to drive the limit shaft 63 to retract, releasing the limit on the lower mold body 5; subsequently, the transfer cylinder is activated, driving the lower mold body 5 and the upper mold body to move forward together along a straight track, smoothly transferring them from the middle vulcanization station back to the front loading station. After being transferred into place, the second hydraulic cylinder 62 is activated again, driving the limit shaft 63 to extend and fix the lower mold body 5, preventing deviation during demolding. After the mold body is fixed, the tilting cylinder is activated, driving the upper mold body to tilt, and simultaneously activating the drive unit 32, which drives the first pulley 345 and the double pulley 342 to rotate via a belt, thereby driving the first rotating shaft 341, the first transmission wheel 343 and the second transmission wheel 347 to rotate synchronously, and simultaneously driving the vibration device 33 to activate, generating gentle vibration, breaking the residual negative pressure adsorption between the finished product and the mold cavity, relieving shrinkage clamping force, and reducing demolding resistance.

[0046] When the first transmission wheel 343 rotates, it drives the turntable 358 of the first adjustment component 344 to rotate. The annular groove of the turntable 358 drives the protrusion 356 of the guide plate 355 to move up and down, which in turn drives the connecting frame 351 to move up and down along the receiving groove of the column 311. The connecting frame 351 drives the push plate 350 to move upward. The push plate 350 pushes the demolding plate 51 of the lower mold body 5, and smoothly ejects the vulcanized product from the mold cavity. The push stroke is adjusted by the eccentric distance of the turntable 358 of the first adjustment component 344.

[0047] S6. After the finished product is ejected, the clamping mechanism moves to the top of the mold cavity at the front loading station, smoothly clamps the finished product, and sends it to the finished product collection station to complete the unloading operation. At the same time, the drive unit 32 drives the push plate 350 and the connecting frame 351 back to the initial position, the vibration device 33 stops vibrating, the upper mold body flips and resets, and the lower mold body 5 is adjusted to the preset loading height to prepare for the next round of loading.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-stage vacuum flat vulcanizing machine, characterized in that: It includes a first vulcanizing machine (1) and a second vulcanizing machine (2) set at two intervals, and a desizing unit (3) and a control cabinet (4) set between the two. The unloading unit (3) includes a base frame (31), a drive unit (32), a vibration device (33), and a pushing device (34). The drive unit (32) is mounted on the base frame (31), and its power output end is connected to the vibration device (33) and the jacking device (34) respectively. Both the first vulcanizing machine (1) and the second vulcanizing machine (2) include a lower mold body (5). The lower mold body (5) is provided with a demolding template (51) that can move up and down. The demolding template (51) is adapted to the shape of the bottom of the mold cavity of the lower mold body (5) and together with the lower mold body (5) in the mold-closed state, forms the bottom surface of the mold cavity. The jacking device (34) includes a transmission mechanism connected to the power output end of the drive unit (32) and a jacking plate (350) located at the lower end of the demolding plate (51). The transmission mechanism is used to drive the push plate (350) to move up and down while the vibration device (33) moves to make the lower mold body (5) vibrate. The first vulcanizing machine (1) and the second vulcanizing machine (2) are also provided with a limiting component (6). The limiting component (6) is used to limit the horizontal displacement of the lower mold body (5) when the vibration device (33) is working.

2. The double-vacuum flat vulcanizing machine according to claim 1, characterized in that: Two drive units (32) are mounted on the base frame (31), and two sets of vibration devices (33) and push devices (34) are respectively mounted below the lower mold body (5) of the first vulcanizing machine (1) and the second vulcanizing machine (2).

3. The double-stage vacuum flat vulcanizing machine according to claim 2, characterized in that: The first vulcanizing machine (1) includes a first oil cylinder for driving the lower mold body (5) to move up and down, and a first support column connected to the power output end of the first oil cylinder; The limiting component (6) includes a U-shaped tube (61) connected above the first support column, and two U-shaped tubes (61) are arranged opposite to each other on both sides of the lower mold body (5) along the length direction; The U-shaped tube (61) is also provided with a second oil cylinder (62), and the power output end of the second oil cylinder (62) is connected to a limit shaft (63). The two limit shafts (63) are arranged opposite to each other on both sides of the lower mold body (5) along the width direction.

4. The double-vacuum flat vulcanizing machine according to claim 3, characterized in that: The transmission mechanism includes a first rotating shaft (341) disposed on the base frame (31), a double pulley (342) pivotally connected to the first rotating shaft (341), a first transmission wheel (343) connected to one end of the first rotating shaft (341), and a first adjusting component (344) connected to the first transmission wheel (343). A first pulley (345) is provided between the double pulley (342) and the drive unit (32). A connecting frame (351) is slidably connected to the base frame (31). The connecting frame (351) has a first extension shaft (352) at both ends. The base frame (31) has a receiving groove for accommodating the sliding of the first extension shaft (352). The push plate (350) is located above the connecting frame (351) near the lower mold body (5). When the first rotating shaft (341) rotates, the first adjusting component (344) drives the connecting frame (351) to reciprocate in the height direction relative to the base frame (31).

5. The double-stage vacuum flat vulcanizing machine according to claim 4, characterized in that: The base frame (31) is also provided with a second pivot shaft (346) that is pivotally connected. A second transmission wheel (347) is sleeved on the second pivot shaft (346). The second transmission wheel (347) is connected to the first transmission wheel (343) by a belt drive. The second rotating shaft (346) has a second adjustment component and a third adjustment component (349) respectively on both sides. The connecting frame (351) has a second extension shaft (353) corresponding to the second adjustment component and a third extension shaft (354) corresponding to the third adjustment component (349). The second adjustment component and the third adjustment component (349) have the same structure as the first adjustment component (344).

6. The double-vacuum flat vulcanizing machine according to claim 5, characterized in that: The first adjustment component (344) includes a rectangular block (357) fixedly connected to the first transmission wheel (343), and a turntable (358) slidably connected along the length of the rectangular block (357). The turntable (358) has a recessed annular groove formed on it. The rectangular block (357) is provided with a locking member (348) for limiting the sliding of the turntable (358). The locking position of the locking member (348) limits the eccentric distance of the turntable (358) relative to the first transmission wheel (343). The connecting frame (351) is also provided with a guide plate (355), and the guide plate (355) is provided with a protruding post (356). The post (356) is located in the annular groove. When the first transmission wheel (343) rotates, the post (356) drives the connecting frame (351) to move up and down with the rotation of the turntable (358).

7. The double-stage vacuum flat vulcanizing machine according to claim 6, characterized in that: The rectangular block (357) has a dovetail groove extending along its length, and the turntable (358) has an insert block adapted to the dovetail groove, the insert block being inserted into the dovetail groove. The locking member (348) is a screw fixedly connected to the rectangular block (357). The screw is screwed to the insert block. When the screw is rotated, the insert block moves relative to the length direction of the rectangular block (357) to adjust the eccentric distance between the turntable (358) and the first transmission wheel (343).

8. The double-stage vacuum flat vulcanizing machine according to claim 7, characterized in that: The base frame (31) includes several columns (311) disposed on the outside of the connecting frame (351), the receiving groove is formed on the columns (311), two first extension shafts (352) are respectively disposed at the tail end of the connecting frame (351), and the second extension shaft (353) and the third extension shaft (354) are disposed opposite to each other in the middle of the connecting frame (351).

9. The double-stage vacuum flat vulcanizing machine according to claim 8, characterized in that: The vibration device (33) includes a third rotating shaft (331), a vibrating plate (332), and a support roller (333). The third rotating shaft (331) is pivotally connected to the base frame (31), and a third transmission wheel (334) is provided at one end. The third transmission wheel (334) is connected to the double pulley (342) of the drive unit (32) via a belt. The two vibratory discs (332) are respectively sleeved and fixed at both ends of the third rotating shaft (331), and the support rollers (333) are respectively fixed between the two vibratory discs (332). The outer edge of each vibratory disc (332) is alternately formed with an outwardly protruding convex arc segment (3321) and an inwardly concave arc segment (3322) along the circumferential direction. The support roller (333) is located below the lower mold body (5). When the drive unit (32) drives the third rotating shaft (331) to rotate, the support roller (333) rotates with the vibrating plate (332) and contacts and separates from the bottom of the lower mold body (5) in sequence, thereby causing the lower mold body (5) to vibrate up and down.

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