Length-adjustable production line for large-size non-standard rubber mould pressing foaming material

Abstract

The invention relates to a length-adjustable production line for a large-size non-standard rubber mold pressing foaming material. The length-adjustable production line comprises an internal mixing unit, an open mixing unit, an extrusion unit, a vulcanization unit and a control system, according to the rubber mold pressing foaming material production line, the stability problem is fundamentally solved, through the multi-cylinder cooperation matrix, the grouping series oil way, the high-precision valve control and the composite synchronous mechanism, the hidden danger that a hot plate inclines and is unstable in lifting is thoroughly eliminated, and equipment operation is safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of rubber molding foam material production technology, and in particular to a production line for large-size non-standard rubber molding foam material with adjustable length. Background Technology

[0002] Hydraulic flatbed vulcanizing units are commonly used equipment in the production of rubber molding foam materials for vulcanization molding. Existing conventional hydraulic flatbed vulcanizing units (such as those adapted to 1500mm×7200mm sizes) are typically designed for standardized rubber molding foam products and can meet the production needs of products of conventional sizes.

[0003] However, with the increasing market demand for large-size non-standard rubber molding foam materials (such as products exceeding 12000mm in length and 1600mm in width), the aforementioned conventional hydraulic flat vulcanizing units have gradually revealed fundamental technical bottlenecks. Simply scaling up traditional equipment proportionally to adapt to large-size production will trigger a series of chain-reaction technical problems, as follows: 1. Structural stability issues: As the size of the hot plate increases significantly with production demands, it is prone to tilting during lifting operations due to uneven force distribution, which can cause it to scrape against the equipment column. This can result in physical damage to equipment components and directly affect the dimensional accuracy and appearance integrity of the molded foam products. 2. Hydraulic system compatibility issues: If the traditional design of a single or a small number of large-diameter main hydraulic cylinders is used, the pressure in the hydraulic pipeline will be excessively concentrated, which can easily cause pipeline damage or even bursting; if the number of hydraulic cylinders is simply increased, the uneven distribution of the oil circuit length of each hydraulic cylinder will lead to asynchronous pressure transmission, which will eventually cause the hot plate lifting action to become unstable. 3. Temperature uniformity issues: The extra-long and extra-wide hot plate structure prolongs the flow path of steam in its internal pipes and causes uneven resistance distribution, resulting in temperature differences on the hot plate surface that far exceed ±5℃. This leads to inconsistent vulcanization reaction processes in the rubber raw materials, making the products prone to local over-vulcanization or under-vulcanization defects. Such defects further degrade the mechanical properties of the products, such as a sharp drop in tear strength, poor adhesion of the rubber compound, and low overall mechanical properties. Subsequent cutting and processing must avoid the defective areas, significantly reducing material utilization.

[0004] To address the technical challenges in the production of large-size non-standard rubber molding foam materials, this application, based on the non-standard large-scale hydraulic flat vulcanizing machine technology disclosed in utility model patent (ZL2019224811590) and combined with engineering experience in the 500-ton-class new non-standard large-size rubber flat vulcanization molding process, proposes a systematic and differentiated technical solution, and further develops the special unit described in this patent. Summary of the Invention

[0005] This invention provides a production line for large-size non-standard rubber molding foam materials with adjustable length. Through two parallel technical solutions tailored to different extreme widths (8 meters 2700 tons and 12 meters 600 tons), it systematically solves the problems of stability, pressure balance and temperature uniformity brought about by the large-scale equipment, and realizes the stable and efficient production of high-quality foam products with specifications of 1600mm×(11000mm-12000mm)×80mm.

[0006] The present invention adopts the following technical solution: A production line for large-size non-standard rubber molding foam material with adjustable length includes a mixing unit, an open milling unit, an extrusion unit, a vulcanization unit, and a control system. The vulcanizing unit mentioned above includes a support frame, a lifting assembly, a modular hot plate unit, and a synchronous adjustment mechanism; The aforementioned support frame includes a lower base, an upper cover, and columns connecting the two. The columns are segmented splicing structures and can be detached and fixed via flanges. The aforementioned lifting assembly includes a lower cover disposed on the top of the lower base, and a piston mechanism for driving the lower cover to move vertically. The piston mechanism includes a main hydraulic piston cylinder and an auxiliary piston cylinder. The aforementioned modular hot plate unit is an independent modular structure, which is spliced ​​and fixed to the lower cover by quick-locking parts. The hot plate body is provided with steam inlet and steam outlet, and has internal heat conduction pipes. The aforementioned synchronous adjustment mechanism includes a gear shaft fixed to the lower base, a gear mounted on the gear shaft, and a telescopic rack meshing with the gear; The aforementioned control system is electrically connected to the mixing unit, open milling unit, extrusion unit, and vulcanization unit.

[0007] Furthermore, it also includes a length adjustment auxiliary unit, which includes a telescopic guide rail assembly and an adjustable mold fixing device. The telescopic guide rail assembly includes a fixed guide rail and a telescopic guide rail, and the adjustable mold fixing device is installed between the hot plate units.

[0008] Furthermore, the number of the above-mentioned modular hot plate units is 6-10 sets, and the heat conduction pipes of each hot plate are arranged in an S-shape, with two sets of heat conduction pipes symmetrically arranged along the center line.

[0009] Furthermore, the steam inlet is connected to the steam inlet pipeline via a hose, and the steam outlet is connected to the steam exhaust pipeline via a hose, forming a circulating heat conduction system.

[0010] Furthermore, the end of the aforementioned telescopic guide rail assembly is provided with a locking device, which includes an electromagnetic lock and a mechanical locking pin, thus doubly locking and fixing the telescopic guide rail.

[0011] Furthermore, the aforementioned adjustable mold fixing device includes an adjusting screw and an anti-slip buffer layer. The clamping distance can be changed by adjusting the screw to adapt to non-standard molds of different lengths.

[0012] Furthermore, the aforementioned heat-conducting pipes are made of corrosion-resistant alloy material, and the bending radius of the S-shaped pipes is 50-80mm.

[0013] Furthermore, the rack of the aforementioned synchronous adjustment mechanism is fixed to the bottom surface of the lower cover, and moves up and down with the lower cover, driving the gear to mesh and rotate. The gear at the other end of the coaxial axis moves synchronously with the rack, ensuring the balance of the lower cover's lifting and lowering.

[0014] Furthermore, the aforementioned support frame has steps at both ends that mate with modular hot plate units.

[0015] Technical solution for Unit 1 (2700 tons, 8 meters wide): This machine is designed for large tonnage and medium-to-ultra-wide (8 meters) scenarios. Its core features are to counteract the size enlargement effect through "matrix-type multi-main cylinder + auxiliary cylinder collaboration" and "dual symmetrical flow channel".

[0016] Composite piston mechanism and intelligent oil circuit system: Sixteen main hydraulic piston cylinders are evenly distributed in a matrix at the bottom of the lower cover and interconnected through an integrated oil pipeline to achieve a basic and even distribution of pressure.

[0017] Eight auxiliary booster cylinders are provided, located outside the main cylinder matrix. This design inherits and develops the "dual main cylinder + dual auxiliary cylinder" concept from the prototype technology of the 2000-ton and 500-ton non-standard large hydraulic flat vulcanizing machines in the utility model patent ZL201922481159.0 "A Non-standard Large Hydraulic Flat Vulcanizing Machine". The function of the auxiliary cylinders is elevated from mainly assisting to being able to independently withdraw during the high-pressure holding stage, thereby optimizing the stress state of the main cylinder and significantly reducing the initial rising torque caused by the ultra-wide equipment, avoiding the risk of oil pipe rupture.

[0018] The intelligent control system provides power to the aforementioned 24 hydraulic cylinders. Its inlet and return oil lines adopt an independent branch design (16 main cylinder oil lines + 8 auxiliary cylinder oil lines), and a high-precision hydraulic pressure regulating valve is connected in series on each inlet oil line. This system realizes the digital and refined upgrade of the "hydraulic pressure regulating valve fine adjustment" technology in the prototype technology of the 2000-ton and 500-ton non-standard large hydraulic flat vulcanizing machines in the utility model patent ZL201922481159.0 "A Non-standard Large Hydraulic Flat Vulcanizing Machine". It can perform millisecond-level dynamic compensation for the pressure of a large number of hydraulic cylinders, ensuring the absolutely stable lifting and lowering of the 8-meter-wide hot plate.

[0019] Multi-layer hot plate and symmetrical flow guiding system: Ten sets of hot plates are set up with a layer spacing of 350mm, forming a 9-layer vulcanization space.

[0020] Each hot plate integrates two sets of perfectly symmetrical S-shaped flow guide pipes along the center line. This design is directly derived from the "another S-shaped pipe symmetrically arranged along the third center line" scheme in the prototype technical embodiment 1 of the 2000-ton and 500-ton non-standard large hydraulic flat vulcanizing machine in utility model patent ZL201922481159.0 "A Non-standard Large Hydraulic Flat Vulcanizing Machine", and has been established as the standard design. Steam flows in from one side inlet, fully traverses the rear half of the hot plate through the S-shaped pipe, then turns back through the intermediate connecting pipe, traverses the front half of the hot plate through another symmetrical S-shaped pipe, and flows out from the outlet, ensuring that the temperature conduction error over an 8-meter width is ≤±2.5℃.

[0021] Synchronous transmission mechanism: Four sets of gear and rack synchronization mechanisms are arranged at the four corners of the bottom of the hot plate. The racks are fixed to the lower cover, and the gears are fixed to the base. This mechanism is a standardized and enhanced application of the "synchronous rack mechanism" in the prototype technology of the 2000-ton and 500-ton non-standard large hydraulic flat vulcanizing machines in the utility model patent ZL201922481159.0 "A Non-standard Large Hydraulic Flat Vulcanizing Machine". Through four-point mechanical synchronization, the horizontality of the hot plate is rigidly constrained, and tilting is completely eliminated.

[0022] Technical solution for Unit 2 (600 tons, 12 meters wide): This machine is designed for extreme width (12 meters) and relatively moderate tonnage scenarios. Its core is to meet the challenges of ultra-wide width by using "grouped series hydraulic cylinders + full-area symmetrical flow channel + composite synchronous guidance".

[0023] Linked piston mechanism and closed-loop control system: The design employs 12 main drive piston cylinders, innovatively divided into three groups (4 cylinders per group), arranged along a 12-meter length. The cylinders within each group are connected via a series oil pipeline. This design cleverly utilizes the "symmetrical and even distribution of oil pipeline length" concept from the prototype technology embodiment 2 of the 2000-ton and 500-ton non-standard large hydraulic flat vulcanizing machines in utility model patent ZL201922481159.0, "A Non-standard Large Hydraulic Flat Vulcanizing Machine," to balance oil pressure transmission. Furthermore, it upgrades the "reducing the diameter of the main piston cylinder" solution to "multiple small cylinders grouped in series," fundamentally solving the problem of lag and inconsistency in pressure transmission over ultra-long oil pipelines.

[0024] Six auxiliary balance cylinders are arranged between the main cylinder group. Its control logic incorporates the intelligent control concept of "lowering the single-sided independent hydraulic piston cylinder after reaching the set pressure value to facilitate mold opening" from the prototype technology of the 2000-ton and 500-ton non-standard large hydraulic flat vulcanizing machines in the utility model patent ZL201922481159.0 "A Non-standard Large Hydraulic Flat Vulcanizing Machine", and integrates it into the closed-loop system.

[0025] The closed-loop control system not only provides power, but also has built-in pressure and displacement sensors to monitor and adjust the pressure and hot plate displacement of each group of cylinders in real time, so as to achieve adaptive and precise control.

[0026] Wide-range heating plate and global temperature equalization system: Eight sets of hot plates are set up with a layer spacing of 380mm.

[0027] The hot plate employs four sets of S-shaped flow guide pipes, symmetrically arranged along both horizontal and vertical double center lines. This represents a dimensional upgrade of the symmetrical design concept of the 2000-ton and 500-ton non-standard large-scale hydraulic flat vulcanizing machines in the utility model patent ZL201922481159.0 "A Non-standard Large-scale Hydraulic Flat Vulcanizing Machine". It forms a full-area gridded flow channel covering an area of ​​12 meters × 1.6 meters, allowing steam to be injected from multiple inlets and flow evenly within the symmetrical network, ensuring that the temperature uniformity error in any corner is ≤ ±3℃.

[0028] Synchronization guidance mechanism: It innovatively combines six sets of rack and pinion drive units and two sets of linear guide rail units. The rack and pinion provide synchronous driving force, while the linear guide rails act as rigid physical guides, providing lateral restraint. This composite design of "drive + rigid restraint" is the ultimate solution for the slight swaying moment that may be generated during the ascent of the 12-meter ultra-wide platform, ensuring absolute straightness and smoothness during the lifting process.

[0029] As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: 1. The rubber molding foam material production line of the present invention has successfully achieved ultra-large size production. Two machines can stably produce foam products with a size of 1600mm×(11000mm-12000mm)×80mm, which more than doubles the effective production size and breaks through the industry bottleneck.

[0030] 2. The rubber molding foam material production line of the present invention fundamentally solves the stability problem: through multi-cylinder collaborative matrix, grouped series oil circuit, high-precision valve control and composite synchronization mechanism, the hidden dangers of hot plate tilting and unstable lifting are completely eliminated, and the equipment operates safely and reliably.

[0031] 3. The rubber molding foam material production line of the present invention is based on the principle of symmetrical flow channel development with double symmetry and four-sided symmetry flow channel design, which enables the temperature difference of ultra-large area hot plate to be controlled within ±3℃, laying the foundation for uniform vulcanization of products.

[0032] 4. The uniform temperature and stable pressure of the rubber molding foam material production line of the present invention result in consistent vulcanization degree inside the product, good fusion at the joints, and significantly improved softness and overall tear strength, thereby improving the utilization rate of raw material punching.

[0033] 5. This invention not only provides two specific devices, but also demonstrates a design methodology for addressing different "non-standard large-scale" requirements (focusing on tonnage or width), which has high industry promotion value. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the rubber molding foam material production line of the present invention.

[0035] Figure 2 This is a schematic diagram of the main structure of the No. 1 vulcanizing machine of the present invention.

[0036] Figure 3 This is a side view of the No. 1 vulcanizing machine of the present invention.

[0037] Figure 4 This is a schematic diagram of the oil circuit of the No. 1 vulcanizing machine of the present invention.

[0038] Figure 5 This is a schematic diagram of the steam guiding structure of the hot plate of the No. 1 vulcanizing machine of the present invention.

[0039] Figure 6 This is a schematic diagram of the main structure of the No. 2 vulcanizing machine of the present invention.

[0040] Figure 7 This is a side view of the No. 2 vulcanizing machine of the present invention.

[0041] Figure 8 This is a schematic diagram of the oil circuit of the No. 2 vulcanizing machine of the present invention.

[0042] Figure 9 This is a schematic diagram of the steam guide structure of the hot plate of the No. 2 vulcanizing machine of the present invention.

[0043] The components include: 1. Hydraulic press frame; 2. Upper cover; 3. Steam inlet; 4. Hot plate; 5. Steam outlet; 6. Lower cover; 7. Main hydraulic piston cylinder; 8. Lower base; 9. Auxiliary piston cylinder; 10. Steam exhaust pipeline assembly; 11. Steam inlet pipeline assembly; 12. Steam pressure gauge; 13. Oil pressure regulating valve; 14. Main piston cylinder return oil pipeline; 15. Main piston cylinder inlet oil pipeline; 16. Auxiliary piston cylinder inlet oil pipeline; 17. Auxiliary piston cylinder return oil pipeline; 18. Main pump high and low pressure oil inlet switching integration; 19. Main piston cylinder pipeline high pressure pump; 20. Oil station; 21. Auxiliary piston pump; 22. Main piston cylinder pipeline low pressure pump; 30. Steam inlet pipeline assembly; 31. Column; 38. Synchronous gear mechanism; 39. Main hydraulic piston cylinder; 40. Auxiliary hydraulic piston cylinder; 41. Main piston cylinder oil pressure regulating valve; 50. Main piston cylinder pipeline low pressure pump. Detailed Implementation

[0044] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0045] Reference Figures 1-9 A production line for large-size non-standard rubber molding foam material with adjustable length, including a mixing unit, an open milling unit, an extrusion unit, a vulcanization unit, and a control system; The vulcanizing unit mentioned above includes a support frame, a lifting assembly, a modular hot plate unit, and a synchronous adjustment mechanism; The aforementioned support frame includes a lower base 8, an upper cover 2, and a column 31 connecting the two. The column 31 is a segmented splicing structure and can be detached and fixed by a flange. The aforementioned lifting assembly includes a lower cover 6 disposed on the top of the lower base 8, and a piston mechanism for driving the lower cover 6 to move vertically. The piston mechanism includes a main hydraulic piston cylinder 7 and an auxiliary piston cylinder 9. The aforementioned modular hot plate unit is an independent modular structure, which is spliced ​​and fixed to the lower cover 6 by quick locking parts. The hot plate 4 is provided with a steam inlet and a steam outlet, and has internal heat conduction pipes. The aforementioned synchronous adjustment mechanism includes a gear shaft fixed to the lower base 8, a gear mounted on the gear shaft, and a telescopic rack meshing with the gear. The aforementioned control system is electrically connected to the mixing unit, open milling unit, extrusion unit, and vulcanization unit.

[0046] It also includes a length adjustment auxiliary unit, which includes a telescopic guide rail assembly and an adjustable mold fixing device. The telescopic guide rail assembly includes a fixed guide rail and a telescopic guide rail, and the adjustable mold fixing device is installed between the hot plate units.

[0047] The number of the above-mentioned modular hot plate units is 6-10 sets, preferably 6 sets. The heat conduction pipes of each hot plate body 4 are arranged in an S-shape, and two sets of heat conduction pipes are symmetrically arranged along the center line.

[0048] The steam inlet is connected to the steam inlet pipeline assembly 11 via a hose, and the steam outlet is connected to the steam exhaust pipeline assembly 10 via a hose, forming a circulating heat conduction system.

[0049] The ends of the aforementioned telescopic guide rail assembly are provided with locking devices, which include an electromagnetic lock and a mechanical locking pin, thus doubly locking and fixing the telescopic guide rail.

[0050] The aforementioned adjustable mold fixing device includes an adjusting screw and an anti-slip buffer layer. The clamping distance can be changed by adjusting the screw to adapt to non-standard molds of different lengths.

[0051] The aforementioned heat-conducting pipes are made of corrosion-resistant alloy material, and the bending radius of the S-shaped pipes is 50-80mm.

[0052] The rack of the aforementioned synchronous adjustment mechanism is fixed to the bottom surface of the lower cover 6. It moves up and down with the lower cover 6 and drives the gear to mesh and rotate. The gear at the other end of the coaxial axis moves synchronously with the rack to ensure the balance of the lower cover 6 in raising and lowering.

[0053] The aforementioned support frame has steps at both ends to accommodate modular hot plate units.

[0054] Reference Figures 2-5 Technical solution for vulcanizing machine No. 1 (2700 tons, 8 meters wide): This machine is designed for large tonnage and medium-to-ultra-wide (8 meters) scenarios. Its core features are to counteract the size enlargement effect through "matrix-type multi-main cylinder + auxiliary cylinder collaboration" and "dual symmetrical flow channel".

[0055] Composite piston mechanism and intelligent oil circuit system: Sixteen main hydraulic piston cylinders 7 are evenly distributed in a matrix at the bottom of the lower cover 6 and interconnected through an integrated oil pipeline to achieve a basic and even distribution of pressure.

[0056] Eight auxiliary booster cylinders are installed outside the main cylinder matrix. The function of the auxiliary cylinders is elevated from primarily assisting to the point where they can be independently deactivated during the high-pressure holding phase. This optimizes the stress state of the main cylinders and significantly reduces the initial rise torque caused by the equipment's extra-wide width, thus avoiding the risk of oil pipe rupture.

[0057] The intelligent control system provides power to the aforementioned 24 hydraulic cylinders. Its inlet and return oil lines adopt an independent branch design (16 main cylinder oil lines + 8 auxiliary cylinder oil lines), and a high-precision oil pressure regulating valve is connected in series on each inlet oil line. This system realizes the digital and refined upgrade of the "oil pressure regulating valve fine-tuning" technology in the prototype technology of non-standard large hydraulic flat vulcanizing machine. It can perform millisecond-level dynamic compensation for the pressure of a large number of hydraulic cylinders, ensuring the absolutely stable lifting and lowering of the 8-meter-wide hot plate.

[0058] Multi-layer hot plate and symmetrical flow guiding system: Ten sets of hot plates are set up with a layer spacing of 350mm, forming a 9-layer vulcanization space.

[0059] Each set of hot plates integrates two sets of perfectly symmetrical S-shaped flow guide pipes along the center line. Steam flows in from one inlet, fully traverses the rear half of the hot plate through the S-shaped pipes, then turns back through the middle connecting pipe, traverses the front half through another symmetrical S-shaped pipe, and flows out from the outlet, ensuring that the temperature conduction error over an 8-meter width is ≤±2.5℃.

[0060] Synchronous transmission mechanism: Four sets of gear and rack synchronization mechanisms are arranged at the four corners of the bottom of the hot plate. The racks are fixed to the lower cover 6, and the gears are fixed to the base. This mechanism is a standardized and enhanced application of the "synchronous rack and rack mechanism" in the prototype technology of non-standard large hydraulic flat vulcanizing machine. Through four-point mechanical synchronization, the horizontality of the hot plate is rigidly constrained, and tilting is completely eliminated.

[0061] The vulcanizing machine includes a lower base 8, a lower cover 6 mounted on the lower base 8, an upper cover 2, a column 31 connecting the lower cover 6 and the upper cover 2, a piston mechanism located at the bottom of the lower cover 6, which can drive the lower cover to move vertically up and down; hot plate bodies 4, of which there are groups of hot plate bodies 4, the internal pipes of the hot plate bodies 4 are arranged in an S-shape, and another internal pipe with the same S-shape arrangement is symmetrically arranged along the third center line, that is, the hot plate bodies 4 have a group of S-shaped pipes; the steam inlet and steam outlet are located at the two ends of the S-shape respectively, and the groups of hot plate bodies 4 are stacked on the lower cover 6, forming a total of 6 layers of hot plate space (the number of layers in the attached drawings is different), the mold is placed in the hot plate space, the first layer is always in close contact with the lower cover 6, and the seventh layer is in close contact with the upper cover 2. The hot plate 4 has a steam inlet and a steam outlet. The steam outlet is connected to the steam inlet pipe assembly 11 installed on the side of the column 31 via a metal hose (not shown in the figure). When steam is introduced into the steam inlet pipe assembly 11, the steam passes through the metal hose and the internal pipes of the hot plate 4, and is then conducted through the entire hot plate, so that the hot plate 4 is heated evenly and the temperature is stabilized within the set range. The steam and water vapor will reach the steam exhaust pipe assembly 10 through the steam outlet, and then be discharged into the corresponding recycling water tank to form a cycle.

[0062] It also includes a control system, which is connected to the piston mechanism and provides power to the piston mechanism; the piston mechanism includes a main piston rod and an auxiliary cylinder; the control system is connected to the main piston rod through an oil inlet line to provide power to the main piston rod, and at the same time the control system is connected to the main piston rod through a return oil line; the control system is connected to the auxiliary cylinder through an oil inlet line; the control system is connected to the first auxiliary cylinder through a third return oil line, and the control system is also connected to the second auxiliary cylinder through a fourth return oil line.

[0063] When the control system provides power to the main piston rod and auxiliary cylinder, the main piston rod and auxiliary cylinder push the lower cover 6 and hot plate 4 to rise. The six layers of hot plate 4 are stacked and rise one after another without any gap between the layers. The top layer of hot plate 4 is integrated with the upper cover 2. When stacked to the top, the seventh layer is zero, and the sixth layer is zero, and each layer is zero until the gap between the hot plate 4 and the upper cover 2 is zero. If the hot plate 4 tilts during the rise, it will scrape the hydraulic press column 31. This can be finely adjusted by the hydraulic pressure regulating valve 13 (the hydraulic pressure regulating valve 13 is installed on the first return oil line and is usually calibrated during equipment installation and commissioning). When the hydraulic pressure reaches the set value of 2 MPa, the pressure is continuously supplied until it reaches 16.8 MPa through existing technology. The auxiliary piston cylinder 9 pump reverses and descends to the lower stroke position through the fourth return oil line, and the vulcanization timer begins. When the timer expires, the internal pressure generated by the vulcanization of the rubber material inside the mold is activated. At the same time, the main piston cylinder is rapidly depressurized through the first return oil line. In the hydraulic oil rapid flow control system, the hot plate falls rapidly, the mold opens, and the foam body with relatively complete vulcanization and initial foam size is taken out from the mold.

[0064] Reference Figures 6-9 Technical solution for vulcanizing machine No. 2 (600 tons, 12 meters wide): This machine is designed for extreme width (12 meters) and relatively moderate tonnage scenarios. Its core is to meet the challenges of ultra-wide width by using "grouped series hydraulic cylinders + full-area symmetrical flow channel + composite synchronous guidance".

[0065] Linked piston mechanism and closed-loop control system: The design employs 12 main drive piston cylinders, innovatively divided into three groups (4 cylinders per group), arranged along a 12-meter length. The cylinders within each group are connected via a series oil circuit. This design cleverly utilizes the concept of "symmetrically distributing the oil circuit length" from Example 2 of the non-standard large-scale hydraulic flat vulcanizing machine prototype to balance oil pressure transmission. Furthermore, it upgrades the "reducing the diameter of the main piston cylinder" solution to "multiple small cylinders grouped in series," fundamentally solving the problem of lag and inconsistency in pressure transmission over ultra-long oil circuits.

[0066] The closed-loop control system not only provides power, but also has built-in pressure and displacement sensors to monitor and adjust the pressure and hot plate displacement of each group of cylinders in real time, so as to achieve adaptive and precise control.

[0067] Wide-range heating plate and global temperature equalization system: Set up 8 sets of hot plate bodies 4, with a layer spacing of 380mm.

[0068] The hot plate has four sets of S-shaped flow guide pipes inside, and is symmetrically arranged with horizontal and vertical double center lines to form a full-area grid flow channel covering an area of ​​12 meters × 1.6 meters. Steam can be injected from multiple inlets and flows evenly in the symmetrical network to ensure that the temperature uniformity error in any corner is ≤ ±3℃.

[0069] Synchronization guidance mechanism: It innovatively combines six sets of rack and pinion drive units and two sets of linear guide rail units. The rack and pinion provide synchronous driving force, while the linear guide rails act as rigid physical guides, providing lateral restraint. This composite design of "drive + rigid restraint" is the ultimate solution for the slight swaying moment that may be generated during the ascent of the 12-meter ultra-wide platform, ensuring absolute straightness and smoothness during the lifting process.

[0070] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A production line for large-size non-standard rubber molding foam material with adjustable length, characterized in that: The application relates to a rubber mixing and vulcanizing system which comprises a mixing unit, an opening unit, an extruding unit, a vulcanizing unit and a control system. The vulcanizing unit comprises a supporting frame, a lifting assembly, a modular hot plate unit and a synchronous adjusting mechanism. The supporting frame comprises a lower base, an upper cover and a stand connecting the lower base and the upper cover, the stand is a segmented splicing structure and can be detachably fixed through flanges. The lifting assembly comprises a lower cover arranged on the top of the lower base and a piston mechanism driving the vertical movement of the lower cover, the piston mechanism comprises a main hydraulic piston cylinder and an auxiliary piston cylinder. The modular hot plate unit is an independent modular structure and is spliced and fixed on the lower cover through quick locking pieces, the hot plate plate body is provided with steam inlets and steam outlets and is internally provided with heat conduction pipelines. The synchronous adjusting mechanism comprises a gear shaft fixed on the lower base, a gear mounted on the gear shaft and an extensible rack meshing with the gear. The control system is electrically connected with the mixing unit, the opening unit, the extruding unit and the vulcanizing unit.

2. The large-size non-standard rubber mold foamed material length-adjustable production line according to claim 1, characterized in that: The length adjusting auxiliary unit comprises a telescopic guide rail assembly and an adjustable mold fixing device, the telescopic guide rail assembly comprises fixed guide rails and telescopic guide rails, and the adjustable mold fixing device is mounted between the hot plate units.

3. The large-size non-standard rubber mold-foamed material length-adjustable production line according to claim 1, characterized in that: The number of the modular hot plate units is 6-10, the heat conduction pipelines of each hot plate plate body are arranged in an S shape and are symmetrically arranged along the center line.

4. The large-size non-standard rubber mold-foamed material length-adjustable production line according to claim 1, characterized in that: The steam inlets are connected with steam inlet pipelines through hoses, the steam outlets are connected with steam outlet pipelines through hoses, and a circulating heat conduction system is formed.

5. The large-size non-standard rubber mold-foamed material length-adjustable production line according to claim 1, characterized in that: The end of the telescopic guide rail assembly is provided with a locking device, the locking device comprises an electromagnetic lock and a mechanical locking pin, and the telescopic guide rail is double-locked and fixed.

6. The large-size non-standard rubber mold-foamed material length-adjustable production line according to claim 2, characterized in that: The adjustable mold fixing device comprises an adjusting screw and an antiskid buffer layer, the clamping spacing is changed through the adjusting screw, and non-standard molds with different lengths are adapted.

7. The large-size non-standard rubber mold-foamed material length-adjustable production line according to claim 1, characterized in that: The heat conduction pipelines are made of corrosion-resistant alloy materials, and the bending radius of the S-shaped pipelines is 50-80 mm.

8. The large-size non-standard rubber mold-foamed material length-adjustable production line according to claim 1, characterized in that: The rack of the synchronous adjusting mechanism is fixed on the bottom surface of the lower cover, moves up and down with the lower cover and drives the gear to mesh and rotate, the gear coaxial with the other end moves synchronously with the rack, and the balance of the lower cover is guaranteed.

9. The large-size non-standard rubber mold-foamed material length-adjustable production line according to claim 3, characterized in that: The two ends of the supporting frame are provided with steps matched with the modular hot plate units.

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