Reinforced concrete formwork convenient for quick formwork removal
By introducing drive, hitting and transmission mechanisms into reinforced concrete forms, automated formwork separation and concrete demolding are achieved, solving the problem of manual demolding in the prior art, and improving the demolding efficiency and demolding effect.
Patent Information
- Application Number
- CN202510511361.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-08-12
AI Technical Summary
The existing reinforced concrete formwork removal work mainly relies on manual labor, which leads to large labor and difficult dismantling of molds, and is less practical.
A reinforced concrete formwork including a driving mechanism, a hitting mechanism and a transmission mechanism is designed. By driving the adjustment shaft to rotate, the lower mold and the upper mold are automatically separated, and the extrusion block and transmission gear system are used to achieve automatic mold release and strike separation of concrete, combining reset blocks and springs to enhance the mold release effect.
Automatic mold release of reinforced concrete formwork is achieved, which reduces manual labor, improves mold removal efficiency and effect, enhances mold release force, and facilitates concrete material collection.
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Figure CN120465692A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of reinforced concrete formwork processing, in particular to a reinforced concrete formwork which is convenient for rapid demoulding. Background Art
[0002] In the construction of reinforced concrete structures, formwork is a crucial component. It is mainly used to define the shape, size and surface quality of concrete pouring. The design and construction of the formwork system directly affects the safety, cost and construction efficiency of the structure.
[0003] After searching the Chinese patent with publication number CN218149794U, a reinforced concrete formwork that is convenient for quick demolding is disclosed, which relates to the technical field of concrete formwork, including a mounting base, a side plate fixedly mounted on the top of the mounting base, a hydraulic rod fixedly mounted on one side of the side plate, an output end of the hydraulic rod fixedly connected to a second placement plate, a first mounting plate fixedly mounted on the top of the second placement plate, and a first placement plate fixedly mounted on one side of the first mounting plate. The beneficial effects of the invention are: the worm is driven to rotate by the second motor, and the worm is engaged with the worm gear to drive the rotating rod to rotate, the rotating rod can drive the gear to rotate by rotating, the gear is engaged with the rack to drive the moving box to move, and the movement of the moving box can drive the limit plate to move so that it is stuck in the inside of the limit groove to complete the secondary limit. Conversely, when the concrete is formed, the demolding work can be completed, reducing the labor workload of the staff.
[0004] Based on the above search and combined with the existing technology, we found that:
[0005] The existing formwork removal work is usually done manually, which results in a large workload for the workers, and is difficult to remove the formwork after the reinforced concrete is formed, which has low practicality. Summary of the Invention
[0006] In order to solve the above technical problems, the present invention proposes a reinforced concrete formwork that is easy to quickly remove the formwork, which not only achieves automatic demoulding but also improves the demoulding effect.
[0007] The technical solution for achieving the purpose of the present invention is: a reinforced concrete formwork that is easy to quickly remove the formwork, including a base, a mounting frame fixedly mounted on one side of the top of the base, a lower mold and an upper mold arranged on the mounting frame, the lower mold being located above the upper mold, a driving mechanism being arranged on the mounting frame, and a striking mechanism and a transmission mechanism being also arranged on the mounting frame;
[0008] The striking mechanism includes an air cavity, an extrusion block, a mounting arm, a mounting slot, a mounting rod and an impact head. The air cavity is opened on the side wall of the mounting frame. The extrusion block is a block with an inclined surface. The extrusion block is movably installed inside the air cavity. A first spring is also installed inside the air cavity. The first spring is movably connected to the extrusion block. The extrusion block is movably installed inside the air cavity through the first spring. The mounting arm is laterally fixed on the side wall of the mounting frame. The mounting slot is opened on one end of the mounting arm away from the mounting frame. The mounting rod is a rod with a rectangular structure. The mounting rod is movably installed inside the mounting slot. The mounting rod passes through the bottom wall of the mounting arm. The impact head is a circular structure and is fixedly mounted on the bottom of the mounting rod.
[0009] In some embodiments, the transmission mechanism includes an air groove, a first movable cavity, a transmission rack, a limiting groove, a second movable cavity and a transmission gear. The first movable cavity is opened inside the mounting arm, and the air groove is opened inside the mounting frame. The air groove makes the air cavity and the interior of the first movable cavity communicate with each other. The limiting groove is opened on the side wall of the mounting rod, and the second movable cavity is opened inside the mounting arm. There are two transmission racks in total, and the two transmission racks are movably installed in the first movable cavity and the second movable cavity respectively, and one end of the transmission rack inside the second movable cavity is located inside the limiting groove, and the side wall surface of the transmission rack inside the limiting groove is an inclined surface, and the transmission gear is movably installed in the interior of the mounting arm corresponding to the interior of the two transmission racks, and the transmission gear is engaged with the two transmission racks for transmission.
[0010] In some embodiments, the driving mechanism includes an adjustment slot, a mounting block, an adjustment shaft and a driving motor. The adjustment slot is opened on the side wall of the mounting frame. There are two mounting blocks in total. Both mounting blocks are movably mounted inside the adjustment slot, and the two mounting blocks are fixedly connected to the lower mold and the upper mold respectively. The driving motor is fixedly mounted on the top of the mounting frame, and the output end of the driving motor is fixedly connected to the adjustment shaft.
[0011] In some embodiments, the adjustment shaft is a cylindrical structure with two opposite threads. The adjustment shaft is movably installed inside the adjustment groove, and the adjustment shaft passes through the upper and lower walls of the two mounting blocks and is threadedly connected to the two mounting blocks.
[0012] In some embodiments, a reset block is provided inside the mounting groove, and the reset block is fixedly connected to the mounting rod. A second spring is also provided inside the mounting groove, and the second spring is connected to the reset block.
[0013] In some embodiments, a partition is provided inside the lower mold, an opening is provided at the bottom of the lower mold, and a movable mechanism is provided inside the base and the mounting frame.
[0014] In some embodiments, the movable mechanism includes a movable seat, a movable groove, a transmission shaft and a transmission bevel gear. The movable seat is fixedly mounted on the bottom of the partition, the movable seat is located inside the opening, the movable groove is opened on the top wall of the base, the bottom of the movable seat is located inside the movable groove, the transmission shaft is a cylindrical structure with threads, the transmission shaft is movably mounted inside the movable groove, there are two transmission bevel gears, and the two transmission bevel gears are respectively fixedly mounted on the bottom of the transmission shaft and the adjustment shaft.
[0015] In some embodiments, the transmission shaft passes through the side wall of the movable seat and is threadedly connected to the movable seat, and the two transmission bevel teeth are engaged with each other.
[0016] In some embodiments, the bottom of the base is provided with moving wheels.
[0017] Compared with the prior art, the present invention has the following significant advantages:
[0018] First, the present invention is provided with a driving mechanism, the driving motor is started, the driving motor drives the adjusting shaft to rotate, the adjusting shaft is threadedly connected to the mounting block, and the two mounting blocks can respectively drive the lower mold and the upper mold to move up and down, thereby separating the lower mold and the upper mold, achieving the effect of automatic demoulding;
[0019] Secondly, the present invention is provided with a striking mechanism and a transmission mechanism. When the driving motor is started to separate the lower mold and the upper mold, the upper mold moves upward to squeeze the extrusion block, and the extrusion block then moves inside the air cavity, thereby squeezing the air inside the air cavity, so that the air inside the air cavity can move to the inside of the first moving cavity through the air groove. At this time, the transmission rack inside the first moving cavity will move inside the first moving cavity under the squeezing of the air, and the transmission rack and the transmission gear are meshed for transmission. At this time, the transmission rack inside the second moving cavity will also be driven to move by the transmission gear, so that the transmission rack leaves the inside of the limit groove. When the mounting rod loses the limit of the transmission rack, the mounting rod and the impact head will move downward, thereby striking the top of the upper mold, so that the concrete inside the upper mold can be better separated from the upper mold, thereby facilitating demoulding.
[0020] Thirdly, the present invention can prevent the mounting rod from falling out of the mounting groove by providing the reset block and the second spring, and at the same time can increase the impact force of the mounting rod and the impact head, thereby further improving the demoulding effect;
[0021] Fourthly, the present invention sets a movable mechanism. When the lower mold and the upper mold are separated, the rotation of the adjusting shaft will drive the transmission shaft to rotate through the transmission bevel gear. The transmission shaft is threadedly connected to the movable seat. The movable seat will drive the partition to move. The partition moves to one side inside the lower mold, which will drive the concrete formed on the partition to move out from between the lower mold and the upper mold, thereby facilitating the removal of the concrete. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The present invention will be further explained below in conjunction with the accompanying drawings and examples:
[0023] Figure 1 is a cross-sectional view of the internal structure provided in one embodiment of the present invention;
[0024] Figure 2 It is a schematic diagram of the overall structure provided in one embodiment of the present invention;
[0025] Figure 3 The present invention provides in one embodiment Figure 1 Enlarged view of point A in the middle;
[0026] Figure 4 The present invention provides in one embodiment Figure 1 Enlarged view of point B in the middle;
[0027] Figure 5 is a schematic diagram of the opening position provided in one embodiment of the present invention;
[0028] Figure 6 It is a schematic diagram of the structure of the movable mechanism provided in one embodiment of the present invention.
[0029] Description of reference numerals:
[0030] 1. Base; 2. Mounting frame; 3. Lower mold; 4. Upper mold; 5. Adjustment slot; 6. Mounting block; 7. Adjustment shaft; 8. Drive motor; 9. Air cavity; 10. Extrusion block; 11. First spring; 12. Mounting arm; 13. Air groove; 14. First movable cavity; 15. Transmission rack; 16. Mounting slot; 17. Mounting rod; 18. Impact head; 19. Limiting slot; 20. Second movable cavity; 21. Transmission gear; 22. Reset block; 23. Second spring; 24. Partition; 25. Opening; 26. Movable seat; 27. Moving slot; 28. Transmission shaft; 29. Transmission bevel gear; 30. Moving wheel. DETAILED DESCRIPTION
[0031] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0032] The present invention provides a reinforced concrete formwork that is easy to quickly remove through improvement. The technical solution of the present invention is:
[0033] like Figure 1As shown, a reinforced concrete formwork that is convenient for rapid demolding includes a base 1, the base 1 is a rectangular structure, a mounting frame 2 is fixedly mounted on one side of the top of the base 1, the mounting frame 2 is a rectangular structure, a lower mold 3 and an upper mold 4 are arranged on the mounting frame 2, the lower mold 3 and the upper mold 4 are both hollow rectangular structures, the lower mold 3 is located above the upper mold 4, a driving mechanism is provided on the mounting frame 2, and a striking mechanism and a transmission mechanism are also provided on the mounting frame 2;
[0034] like Figures 1 to 3 As shown, the driving mechanism includes an adjusting slot 5, a mounting block 6, an adjusting shaft 7 and a driving motor 8. The adjusting slot 5 is a slot with a rectangular structure. The adjusting slot 5 is provided on the side wall of the mounting frame 2. The mounting block 6 is a block with a rectangular structure. There are two mounting blocks 6. The two mounting blocks 6 are movably installed in the adjusting slot 5, and the two mounting blocks 6 are fixedly connected to the lower mold 3 and the upper mold 4 respectively. The adjusting shaft 7 is a cylindrical structure with two opposite threads. The adjusting shaft 7 is movably installed in the adjusting slot 5, and the adjusting shaft 7 passes through the upper and lower walls of the two mounting blocks 6 and is threadedly connected to the two mounting blocks 6. The driving motor 8 is fixedly installed on the top of the mounting frame 2. The output end of the driving motor 8 is fixedly connected to the adjusting shaft 7. When the driving motor 8 is started, the driving motor 8 drives the adjusting shaft 7 to rotate. The adjusting shaft 7 is threadedly connected to the mounting block 6, so that the two mounting blocks 6 can respectively drive the lower mold 3 and the upper mold 4 to move up and down, thereby separating the lower mold 3 and the upper mold 4, thereby achieving the effect of automatic demoulding.
[0035] like Figures 1 to 4 As shown, the striking mechanism includes an air cavity 9, an extrusion block 10, a mounting arm 12, a mounting slot 16, a mounting rod 17 and an impact head 18. The air cavity 9 is a rectangular slot, which is opened on the side wall of the mounting frame 2. The extrusion block 10 is a block with an inclined surface, which is movably installed in the interior of the air cavity 9. A first spring 11 is also installed in the interior of the air cavity 9, which is movably connected to the extrusion block 10. The extrusion block 10 is movably installed in the interior of the air cavity 9 through the first spring 11. The mounting arm 12 is a rectangular structure, which is laterally fixedly mounted on the side wall of the mounting frame 2. The mounting slot 16 is a rectangular slot, which is opened on the end of the mounting arm 12 away from the mounting frame 2. The mounting rod 17 is a rectangular rod, which is movably installed in the interior of the mounting slot 16. The mounting rod 17 passes through the bottom wall of the mounting arm 12. The impact head 18 is a circular structure, which is fixedly mounted on the bottom of the mounting rod 17.
[0036] The transmission mechanism includes an air groove 13, a first moving cavity 14, a transmission rack 15, a limiting groove 19, a second moving cavity 20 and a transmission gear 21. The first moving cavity 14 is a rectangular groove. The first moving cavity 14 is opened inside the mounting arm 12. The air groove 13 is an "L"-shaped groove. The air groove 13 is opened inside the mounting frame 2. The air groove 13 makes the air cavity 9 and the first moving cavity 14 connected. The limiting groove 19 is a rectangular groove. The limiting groove 19 is opened on the side wall of the mounting rod 17. The second moving cavity 20 is a rectangular groove. The cavity 20 is a rectangular groove. The second movable cavity 20 is opened inside the mounting arm 12. There are two transmission racks 15. The two transmission racks 15 are movably mounted inside the first movable cavity 14 and the second movable cavity 20, and one end of the transmission rack 15 inside the second movable cavity 20 is located inside the limiting groove 19. The side wall of the transmission rack 15 inside the limiting groove 19 is an inclined surface. The transmission gear 21 is movably mounted inside the mounting arm 12 and corresponds to the inside of the two transmission racks 15. The transmission gear 21 and The two transmission racks 15 are engaged for transmission. Through the setting of the striking mechanism and the transmission mechanism, when the driving motor 8 is started to separate the lower mold 3 and the upper mold 4, the upper mold 4 moves upward to squeeze the extrusion block 10, and the extrusion block 10 then moves inside the air cavity 9, thereby squeezing the air inside the air cavity 9, so that the air inside the air cavity 9 can move to the inside of the first moving cavity 14 through the air groove 13. At this time, the transmission rack 15 inside the first moving cavity 14 will move inside the first moving cavity 14 under the squeezing of the air, and the transmission rack 15 is engaged with the transmission gear 21 for transmission. At this time, the transmission rack 15 inside the second moving cavity 20 will also be driven by the transmission gear 21 to move, so that the transmission rack 15 leaves the inside of the limit groove 19. When the mounting rod 17 loses the limit of the transmission rack 15, the mounting rod 17 and the impact head 18 will move downward, thereby striking the top of the upper mold 4, so that the concrete inside the upper mold 4 can be better separated from the upper mold 4, thereby facilitating demoulding.
[0037] A reset block 22 is provided inside the mounting groove 16. The reset block 22 is a rectangular block. The reset block 22 is fixedly connected to the mounting rod 17. A second spring 23 is also provided inside the mounting groove 16. The second spring 23 is connected to the reset block 22. The arrangement of the reset block 22 and the second spring 23 can prevent the mounting rod 17 from falling off from the inside of the mounting groove 16. At the same time, the impact force of the mounting rod 17 and the impact head 18 can be increased, thereby further improving the demolding effect.
[0038] like Figure 1 、 Figure 5 as well as Figure 6As shown, in one embodiment, a partition 24 is provided inside the lower mold 3, and the partition 24 is a rectangular plate. An opening 25 is provided at the bottom of the lower mold 3, and the opening 25 is a rectangular groove. A movable mechanism is provided inside the base 1 and the mounting frame 2, and the movable mechanism includes a movable seat 26, a movable groove 27, a transmission shaft 28 and a transmission bevel gear 29. The movable seat 26 is a rectangular structure. The movable seat 26 is fixedly installed at the bottom of the partition 24. The movable seat 26 is located inside the opening 25. The movable groove 27 is a rectangular groove. The movable groove 27 is provided on the top wall of the base 1. The bottom of the movable seat 26 is located inside the movable groove 27. The transmission shaft 28 is a cylindrical structure with threads. The transmission shaft 28 is movably installed Installed inside the movable groove 27, the transmission shaft 28 passes through the side wall of the movable seat 26 and is threadedly connected to the movable seat 26. There are two transmission bevel gears 29, which are fixedly mounted on the transmission shaft 28 and the bottom of the adjusting shaft 7 respectively, and the two transmission bevel gears 29 are engaged with each other, so that when the lower mold 3 and the upper mold 4 are separated, the rotation of the adjusting shaft 7 will drive the transmission shaft 28 to rotate through the transmission bevel gears 29, and the transmission shaft 28 is threadedly connected to the movable seat 26, and the movable seat 26 will drive the partition 24 to move. The partition 24 moves to one side inside the lower mold 3, which will drive the concrete formed on the partition 24 to move out from between the lower mold 3 and the upper mold 4, thereby facilitating the removal of the concrete.
[0039] As shown in the base 1 or the mounting frame 2, the bottom of the base 1 is provided with moving wheels 30, which facilitate the movement of the device.
[0040] The specific working methods are:
[0041] By providing a driving mechanism, starting the driving motor 8, the driving motor 8 drives the adjusting shaft 7 to rotate, and the adjusting shaft 7 is threadedly connected to the mounting block 6, so that the two mounting blocks 6 can respectively drive the lower mold 3 and the upper mold 4 to move up and down, thereby separating the lower mold 3 and the upper mold 4, achieving the effect of automatic demoulding;
[0042] At the same time, through the setting of the striking mechanism and the transmission mechanism, when the driving motor 8 is started to separate the lower mold 3 and the upper mold 4, the upper mold 4 moves upward and will squeeze the extrusion block 10, and the extrusion block 10 then moves inside the air cavity 9, thereby squeezing the air inside the air cavity 9, so that the air inside the air cavity 9 can move to the inside of the first moving cavity 14 through the air groove 13. At this time, the transmission rack 15 inside the first moving cavity 14 will move inside the first moving cavity 14 under the squeezing of the air, and the transmission rack 15 is meshed with the transmission gear 21 for transmission. At this time, the transmission rack 15 inside the second moving cavity 20 will also be driven by the transmission gear 21 to move, so that the transmission rack 15 leaves the inside of the limit groove 19. When the mounting rod 17 loses the limit of the transmission rack 15, the mounting rod 17 and the impact head 18 will move downward, thereby hitting the top of the upper mold 4, so that the concrete inside the upper mold 4 can be better separated from the upper mold 4, thereby facilitating demoulding.
[0043] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacements of the above technical features. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.
Claims
1. A reinforced concrete formwork that is easy to quickly remove, comprising a base (1), a mounting frame (2) fixedly mounted on one side of the top of the base (1), a lower mold (3) and an upper mold (4) being arranged on the mounting frame (2), characterized in that: The lower mold (3) is located above the upper mold (4), and a driving mechanism is provided on the mounting frame (2). The mounting frame (2) is also provided with a striking mechanism and a transmission mechanism; The striking mechanism includes an air cavity (9), an extrusion block (10), a mounting arm (12), a mounting groove (16), a mounting rod (17) and an impact head (18). The air cavity (9) is opened on the side wall of the mounting frame (2). The extrusion block (10) is a block with an inclined surface. The extrusion block (10) is movably mounted inside the air cavity (9). A first spring (11) is also installed inside the air cavity (9). The first spring (11) is movably connected to the extrusion block (10). The extrusion block (10) is moved by the first spring (11). ) is movably mounted inside the air cavity (9), the mounting arm (12) is fixedly mounted laterally on the side wall of the mounting frame (2), the mounting groove (16) is opened on the end of the mounting arm (12) away from the mounting frame (2), the mounting rod (17) is a rod with a rectangular structure, the mounting rod (17) is movably mounted inside the mounting groove (16), the mounting rod (17) passes through the bottom wall of the mounting arm (12), and the impact head (18) is a circular structure. The impact head (18) is fixedly mounted on the bottom of the mounting rod (17).
2. The reinforced concrete formwork that is easy to quickly remove according to claim 1, characterized in that: The transmission mechanism includes an air groove (13), a first movable cavity (14), a transmission rack (15), a limiting groove (19), a second movable cavity (20) and a transmission gear (21). The first movable cavity (14) is opened inside the mounting arm (12), the air groove (13) is opened inside the mounting frame (2), the air groove (13) makes the air cavity (9) and the first movable cavity (14) communicate with each other, the limiting groove (19) is opened on the side wall of the mounting rod (17), the second movable cavity (20) is opened inside the mounting arm (12), and the transmission gear (21) is provided. There are two movable racks (15). The two transmission racks (15) are movably mounted inside the first movable cavity (14) and the second movable cavity (20), respectively. One end of the transmission rack (15) inside the second movable cavity (20) is located inside the limiting groove (19). The wall surface of one side of the transmission rack (15) inside the limiting groove (19) is an inclined surface. The transmission gear (21) is movably mounted inside the mounting arm (12) corresponding to the inside of the two transmission racks (15). The transmission gear (21) is meshed with the two transmission racks (15) for transmission.
3. The reinforced concrete formwork that is easy to quickly remove according to claim 1, characterized in that: The driving mechanism comprises an adjusting groove (5), a mounting block (6), an adjusting shaft (7) and a driving motor (8); the adjusting groove (5) is provided on the side wall of the mounting frame (2); there are two mounting blocks (6); both mounting blocks (6) are movably mounted inside the adjusting groove (5); and the two mounting blocks (6) are fixedly connected to the lower mold (3) and the upper mold (4) respectively; the driving motor (8) is fixedly mounted on the top of the mounting frame (2); and the output end of the driving motor (8) is fixedly connected to the adjusting shaft (7).
4. The reinforced concrete formwork that is easy to quickly remove according to claim 3, characterized in that: The adjusting shaft (7) is a cylindrical structure with two opposite threads. The adjusting shaft (7) is movably mounted inside the adjusting groove (5). The adjusting shaft (7) passes through the upper and lower walls of the two mounting blocks (6) and is threadedly connected to the two mounting blocks (6).
5. The reinforced concrete formwork that is easy to quickly remove according to claim 1, characterized in that: A reset block (22) is provided inside the installation groove (16), and the reset block (22) is fixedly connected to the installation rod (17). A second spring (23) is also provided inside the installation groove (16), and the second spring (23) is connected to the reset block (22).
6. The reinforced concrete formwork that is easy to quickly remove according to claim 1, characterized in that: A partition (24) is provided inside the lower mold (3), an opening (25) is provided at the bottom of the lower mold (3), and movable mechanisms are provided inside the base (1) and the mounting frame (2).
7. The reinforced concrete formwork that is easy to quickly remove according to claim 6, characterized in that: The movable mechanism comprises a movable seat (26), a movable groove (27), a transmission shaft (28) and a transmission bevel gear (29). The movable seat (26) is fixedly mounted on the bottom of the partition (24). The movable seat (26) is located inside the opening (25). The movable groove (27) is opened on the top wall of the base (1). The bottom of the movable seat (26) is located inside the movable groove (27). The transmission shaft (28) is a cylindrical structure with a thread. The transmission shaft (28) is movably mounted inside the movable groove (27). There are two transmission bevel gears (29). The two transmission bevel gears (29) are fixedly mounted on the bottom of the transmission shaft (28) and the bottom of the adjustment shaft (7) respectively.
8. The reinforced concrete formwork that is easy to quickly remove according to claim 7, characterized in that: The transmission shaft (28) passes through the side wall of the movable seat (26) and is threadedly connected to the movable seat (26), and the two transmission bevel teeth (29) are meshed with each other.
9. The reinforced concrete formwork that is easy to quickly remove according to claim 1, characterized in that: The bottom of the base (1) is provided with moving wheels (30).
Citation Information
Patent Citations
Reinforced concrete formwork convenient for quick formwork removal
CN218149794U