A prefabricated laminated slab forming device

Abstract

The application provides a prefabricated laminated slab forming device, and relates to the field of house prefabricated part production. The device comprises a mold table and two pairs of side molds arranged on the mold table. The side molds are provided with a plurality of placing grooves, and the end portions of steel bars are arranged in the placing grooves. A pair of hydraulic cylinders are arranged on the mold table, the push rods of the hydraulic cylinders are provided with support plates, the bottom of each support plate is provided with a plurality of L-shaped supporting plates, the end portions of the steel bars are arranged on the top of the horizontal end of each supporting plate, and the hydraulic cylinders drive the support plates and the supporting plates to reciprocate in the vertical direction. The two pairs of side molds enclose a rectangular mold cavity, a plurality of steel bars are bound in a net shape in the mold cavity, the end portions of the steel bars pass through the placing grooves and extend to the outside of the mold cavity. The application has the characteristics that the disturbance and compaction effect of concrete can be improved during the forming process, and the strength of the laminated slab is improved.

Description

Technical Field

[0001] This application relates to the field of prefabricated housing component production, and in particular to a prefabricated composite slab forming device. Background Technology

[0002] Composite slabs are assembled monolithic floor slabs made by stacking precast slabs and cast-in-place reinforced concrete layers. They feature good integrity, smooth upper and lower surfaces, and ease of finishing, making them suitable for high-rise buildings and large-span buildings with high requirements for overall rigidity. The precast slabs are used as the bottom formwork for the cast-in-place concrete layer, eliminating the need for supporting formwork for the cast-in-place concrete layer.

[0003] When prefabricating composite slabs, the mold needs to be fixed on a platform, then the steel mesh is hoisted into the mold, and concrete is poured into the mold to embed the steel mesh. After the concrete is poured, the mold is usually vibrated to ensure that the concrete is evenly distributed within the mold and to dislodge any air trapped in the concrete, thereby improving the overall strength of the composite slab.

[0004] However, if the mold vibrates too much, it will loosen and cause deviations in the finished product dimensions, or even cause the mold to break. If the mold vibrates too little, it will reduce the vibration effect. Moreover, the presence of the steel mesh truss increases the difficulty for personnel to use tools to stir the concrete from the outside to achieve uniform distribution of the concrete. Summary of the Invention

[0005] In order to improve the problem of poor concrete compaction during the molding process, this application provides a precast composite slab molding device.

[0006] This application provides a precast composite slab forming device, which adopts the following technical solution:

[0007] A precast composite slab forming device includes a mold table and two pairs of side molds disposed on the mold table. The side molds are provided with a plurality of placement grooves, and the ends of the reinforcing bars are inserted into the placement grooves.

[0008] The mold platform is equipped with a pair of hydraulic cylinders, and the push rod of the hydraulic cylinder is equipped with a support plate. The bottom of the support plate is equipped with several L-shaped support plates. The end of the reinforcing bar is located at the top of the horizontal end of the support plate. The hydraulic cylinder pushes the support plate base support plate to move back and forth in the vertical direction.

[0009] By adopting the above technical solution, after the concrete is poured between the two pairs of side molds, a pair of hydraulic cylinders start to operate and push the support plate upward. Since the support plate is located at the bottom of the support plate, the support plate moves upward under the drive of the hydraulic cylinder, and the support plate also moves accordingly. Since the end of the reinforcing bar is located at the top of the horizontal end of the support plate, the support plate lifts the reinforcing bar upward during the upward movement of the support plate. When the reinforcing bar is displaced to the opening of the placement groove (i.e., when the reinforcing bar is about to leave the side mold), the push rod of the hydraulic cylinder retracts downward, so that the support plate, support plate, and reinforcing bar are reset. In this way, during the repeated extension and retraction of the hydraulic cylinder, the reinforcing bar will generate vertical reciprocating motion, thereby creating a disturbance effect on the concrete. Without the use of external tools, it promotes the flow of concrete between the two pairs of side molds, ensuring the uniform distribution of concrete. Moreover, while the reinforcing bar moves up and down, realizing the disturbance and compaction effect on the concrete, the reinforcing bar and the side mold will not collide with each other, thus preventing deformation or damage to the side mold and ensuring that the finished product has high quality.

[0010] Optionally, the two pairs of side molds enclose a rectangular mold cavity, and a number of the reinforcing bars are tied in a mesh inside the mold cavity, with the ends of the reinforcing bars passing through the placement groove and extending to the outside of the mold cavity.

[0011] By adopting the above technical solution, the concrete can form a plate-like structure after curing in the rectangular mold cavity. The pre-embedded steel bars after being tied can reliably improve the structural strength of the composite plate. At the same time, the ends of the steel bars extend to the outside of the mold cavity, which facilitates the connection between two adjacent composite plates.

[0012] Optionally, the support plate extends along the length direction of the side mold;

[0013] Several of the aforementioned pallets are spaced apart at the bottom of the support plate and correspond one-to-one with several of the aforementioned placement slots. The vertical ends of the pallets are parallel to the push rods of the hydraulic cylinders, and the horizontal ends of the pallets are parallel to the mold table.

[0014] By adopting the above technical solution, one end of a steel bar is supported on one pallet, and the pushing action of the hydraulic cylinder on the support plate can realize the synchronous lifting of multiple pallets. This ensures that several steel bars in a mesh pattern can move up or down simultaneously under the lifting action of the pallets, avoiding horizontal movement of the steel bars when they are lifted at an incline, which would cause changes in the assembly position of the steel bars in the mold cavity. In other words, under the pushing action of a pair of hydraulic cylinders, multiple pallets can simultaneously lift or lower the ends of several steel bars, forming a reliable disturbance and compaction effect on the concrete in the mold cavity, ensuring that the concrete is evenly distributed in the mold cavity, and thus ensuring that the composite slab formed after the concrete has cured has sufficient mechanical strength.

[0015] Optionally, a pair of support plates are arranged in parallel, and the pair of support plates are connected by at least one connecting strip. The bottom of the connecting strip has at least two limiting units, and the limiting unit includes a pair of limiting plates. The pair of limiting plates are located on both sides of the connecting strip and clamp the truss outside the steel bar.

[0016] By adopting the above technical solution, connecting the two support plates with connecting strips improves the stability of the support plates during displacement under the push of the hydraulic cylinder, ensuring that the support plates can reliably drive the support plate to lift the reinforcing bars. After several reinforcing bars are tied into a reinforcing mesh, a truss is tied to the outside of the reinforcing mesh, with the truss exposed on the outside of the concrete. In this way, connecting bars are tied to multiple trusses of multiple composite slabs, achieving reliable connection of multiple composite slabs while facilitating the overall casting of the composite slab. A pair of limiting plates clamp the truss, realizing the horizontal limiting effect of the truss, ensuring that the truss can only move vertically back and forth with several reinforcing bars, avoiding horizontal movement of the reinforcing bars. This ensures that after the up and down movement of the reinforcing bars disturbs and compacts the concrete, the reinforcing bars can still stay in the set position, thereby ensuring that the overall strength of the composite slab is improved under the pre-embedding and interference of the reinforcing bars.

[0017] Optionally, the inner wall of the placement groove is fitted to the outer wall of the reinforcing bar, and the end of the reinforcing bar passes through the placement groove and fits against the top of the horizontal end of the tray.

[0018] By adopting the above technical solution, after the width of the placement groove is reasonably set, the outer wall of the reinforcing bar fits against the inner wall of the placement groove, thus achieving the function of limiting the reinforcing bar. At the same time, multiple support plates under a pair of support plates lift the reinforcing bar simultaneously, ensuring that the reinforcing bar only undergoes vertical reciprocating motion and does not produce horizontal movement. In this way, after the reinforcing bar moves vertically to disturb and compact the concrete, it can be quickly and accurately reset.

[0019] Optionally, the length of the limiting plate is greater than the moving height of the reinforcing bar.

[0020] By adopting the above technical solution, it is ensured that the limiting plate has sufficient length to limit the truss, thus ensuring the reliable limiting function.

[0021] Optionally, the placement groove is opened in a vertical direction, and the side mold is also provided with a plurality of sliding grooves that correspond one-to-one with the placement groove. The sliding grooves are opened in a horizontal direction and communicate with the placement groove.

[0022] By adopting the above technical solution, when the hydraulic cylinder pushes the support plate and pallet upward, and the reinforcing bar synchronously moves to the position where the placement groove and the chute intersect, the hydraulic cylinder stops. At this time, by manually pushing and pulling the truss in the horizontal direction, the end of the reinforcing bar can be moved into the chute. At this time, the reinforcing bar can produce horizontal displacement, thereby significantly improving the disturbance and compaction effect on the concrete. After the reciprocating pushing and pulling of the reinforcing bar is completed, the hydraulic cylinder retracts slightly, so that the top of the pallet is lower than the bottom of the chute. When the reinforcing bar is pushed and pulled again, due to the height difference between the bottom of the chute and the bottom of the pallet, the reinforcing bar can automatically fall into the placement groove after moving into it, realizing the resetting of the reinforcing bar. In this way, the setting of the chute realizes the three-dimensional movement of the reinforcing bar, maximizing the disturbance and compaction effect of the reinforcing bar on the concrete. Furthermore, a hydraulic mechanism can be set on the formwork to push the connecting bar or truss, which can improve the pushing efficiency and reduce the labor intensity of personnel.

[0023] Optionally, the bottom of the connecting strip is provided with a groove, and the top of the support plate is provided with a slide bar. The groove covers the top of the slide bar, and relative sliding can occur between the groove and the slide bar.

[0024] By adopting the above technical solution, the groove and the slide bar can be used to limit and guide the connecting bar, ensuring that the connecting bar can reliably slide on the support plate when the connecting bar is pushed to move the steel bar horizontally, and that the connecting bar will not fall off the support plate during the movement. Furthermore, the combination of the groove and the slide bar can also improve the smoothness of the sliding of the connecting bar on the support plate, ensuring that several steel bars can be moved horizontally by pushing the connecting bar or the truss, thereby improving the disturbance effect on the concrete.

[0025] Optionally, the bottom of the chute is higher than the height of the concrete in the mold cavity, and the inner height of the chute is greater than the outer diameter of the reinforcing bar;

[0026] The top of the placement groove is connected to the top of the side mold, and the sliding groove is located on the side wall of the side mold and has a distance between it and the top of the side mold.

[0027] By adopting the above technical solution, the top of the placement groove is connected to the top of the side formwork, and the reinforcing bars can be placed in the placement groove by horizontal insertion or vertical placement, which reduces the difficulty of placing the reinforcing bars and effectively improves the binding efficiency of the reinforcing bars in the mold cavity. The chute is not connected to the top of the side formwork, which can prevent the reinforcing bars from tending to move towards the top of the side formwork during the horizontal pushing and pulling process. That is to say, the chute and the placement groove can be in a cross shape or an inverted T shape, thereby ensuring that the reinforcing bars can switch between horizontal and vertical movement modes and will not detach from the side formwork.

[0028] Optionally, two adjacent side molds are locked together by bolts, and the side molds are fixed to the mold table by magnetic boxes, with the magnetic boxes and the mold table being magnetically attracted to each other.

[0029] By adopting the above technical solution, the mold platform is made of steel, and the magnetic box contains magnets that can attract each other to the mold platform. One end of the magnetic box presses onto the side mold, and the other end of the magnetic box contacts the mold platform. In this way, the magnetic attraction between the mold platform and the magnetic box achieves the clamping of the side mold. At the same time, two adjacent side molds are locked together by bolts. This enables the rapid assembly and fixation of two pairs of side molds on the mold platform. Furthermore, when demolding after the concrete has cured, the side molds can be quickly removed, improving the efficiency of side mold assembly and disassembly and the forming efficiency of the composite plate.

[0030] In summary, this application has the following beneficial effects:

[0031] 1. A pair of side molds are provided with interconnected placement grooves and sliding grooves. The ends of several steel bars tied in the mold cavity and arranged in a mesh are inserted into the placement grooves. Then, by the pushing and placing action of the support plate and pallet by the hydraulic cylinder and the pushing and pulling action of the truss or connecting strip, the reciprocating motion of the steel bars in the horizontal or vertical direction and the switching between the two motion modes are realized. Thus, without the use of external tools, the concrete in the mold cavity can be disturbed and compacted, thereby improving the overall strength of the composite slab after molding.

[0032] 2. By setting multiple limiting units at the bottom of the connecting strip, when the reinforcing bar only needs to reciprocate in the vertical direction, it can restrict the horizontal movement of the reinforcing bar in conjunction with the placement groove, thereby improving the stability of the reinforcing bar during movement; when the reinforcing bar only needs to move in the horizontal direction, the mutual interference between the limiting unit and the truss can realize the linkage between the connecting strip and the truss, effectively improving the disturbance and compaction effect on the concrete. Attached Figure Description

[0033] Figure 1 This is a schematic perspective view of this application;

[0034] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0035] Figure 3 This is a reference diagram showing the assembly state of the side mold;

[0036] Figure 4 yes Figure 1 Reference diagram of the action state;

[0037] Figure 5 yes Figure 4 Enlarged structural diagram at point B;

[0038] In the diagram: 1. Mold table; 2. Side mold; 21. Placement groove; 22. Slide groove; 23. Bolt; 24. Magnetic box; 3. Hydraulic cylinder; 4. Support plate; 40. Slide bar; 5. Support plate; 6. Mold cavity; 7. Connecting bar; 71. Limiting plate; 72. Groove; 8. Reinforcing bar; 9. Truss. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0040] Figure 1 This is a schematic perspective view of this application. Figure 2 yes Figure 1 A magnified structural diagram at point A. See also Figure 1 and Figure 2 A prefabricated composite slab forming device includes a steel mold base 1 and two pairs of side molds 2 disposed on the mold base 1. The two pairs of side molds 2 are adjacent to each other by bolts 23 and form a rectangular mold cavity 6. The side molds 2 are L-shaped. One side of the side molds 2 is attached to the mold base 1. Several magnetic boxes 24 are magnetically attracted to the mold base 1. One end of the magnetic box 24 is attracted to the mold base 1. The other end of the magnetic box 24 covers the top of the side mold 2 that is attached to the mold base 1. The other side of the side mold 2 is perpendicular to the mold base 1.

[0041] Figure 3 This is a reference diagram showing the assembly state of the side mold. See also... Figure 3 and combined Figure 1 On the other side of the side mold 2, there are several placement grooves 21 and sliding grooves 22 that correspond one-to-one with and are interconnected with the placement grooves 21. The sliding grooves 22 and the placement grooves 21 can form a cross shape or an inverted T shape. The placement grooves 21 are formed by opening downward from the top of the side mold 2 and extending vertically. The sliding grooves 22 are connected to the placement grooves 21 and extend horizontally. The placement grooves 21 are connected to the top of the side mold 2 and are open. The sliding grooves 22 are far away from the top of the side mold 2 and are closed. Several reinforcing bars 8 are placed inside the mold cavity 6 and tied into a mesh (i.e., several reinforcing bars 8 are arranged and tied together with steel wire to form a reinforcing bar mesh). The two ends of the reinforcing bars 8 are respectively placed on a pair of opposite side molds 2, and the ends of the reinforcing bars 8 pass through the side wall of the side mold 2 through the placement groove 21 and extend to the outside of the mold cavity 6. That is to say, when the ends of several reinforcing bars 8 are all placed on the placement groove 21, the reinforcing bar mesh is suspended in the mold cavity 6, and several trusses 9 are tied to the outside of the reinforcing bar mesh. Then concrete is poured into the mold cavity 6, and the reinforcing bar mesh will be wrapped by the concrete to achieve the pre-embedding of the reinforcing bar mesh. The trusses 9 and the ends of the reinforcing bars 8 are located on the outside of the concrete and form a precast composite slab. In actual installation, two adjacent precast composite slabs are connected to each other by exposed reinforcing bars 8, and several trusses 9 on two adjacent precast composite slabs are tied together by connecting bars, and then the whole is poured.

[0042] A pair of hydraulic cylinders 3 are also provided on the top of the mold platform 1. The pair of hydraulic cylinders 3 are respectively located on the outside of a pair of oppositely arranged side molds 2. The top of the push rod of the hydraulic cylinder 3 is provided with a support plate 4 (the push rod of the hydraulic cylinder 3 is located at the bottom center of the support plate 4, and pneumatic rods can be set on both sides of the bottom of the support plate 4 to improve the stability of the support plate 4). The support plate 4 is arranged parallel to the corresponding side mold 2. Several L-shaped support plates 5 are spaced apart at the bottom of the support plate 4. The support plates 5 correspond one-to-one with the ends of the reinforcing bars 8. The vertical ends of the support plates 5 are parallel to and separate from the push rods of the hydraulic cylinders 3, and the horizontal ends of the support plates 5 are perpendicular to the push rods of the hydraulic cylinders 3. The top of the horizontal end of the support plate 5 is attached to the part of the steel bar 8. The outer diameter of the steel bar 8 is the same as the width of the placement groove 21, so that the outer wall of the steel bar 8 is attached to the inner wall of the placement groove 21. During the process of the hydraulic cylinder 3 pushing the support plate 4 upward, the support plate 4 will drive the support plate 5 to move upward. During this process, the steel bar 8 will move in the placement groove 21, thereby realizing the vertical movement of the steel bar mesh in the mold cavity 6. When the end of the steel bar 8 is raised to the connection between the placement groove 21 and the slide 22 (at this time, the top of the support plate 5 and the bottom of the slide 22 are flush), pushing the steel bar 8 again can realize the horizontal movement of the steel bar 8 in the slide 22.

[0043] Figure 4 yes Figure 1 Action state reference diagram, Figure 5 yes Figure 4 A magnified structural diagram at point B. (See also...) Figure 4 and Figure 5 After the concrete is poured into the mold cavity 6, the hydraulic cylinder 3 is activated, realizing the reciprocating motion of the support plate 4 and the pallet 5 in the vertical direction, and driving the steel bar 8 to disturb the concrete in the vertical direction. When the steel bar 8 is displaced to the junction of the slide 22 and the placement groove 21, the steel bar 8 or the truss 9 is pushed and pulled horizontally by manual labor or other hydraulic equipment, which can realize the horizontal disturbance of the steel bar 8 in the front-back or left-right direction in the concrete. In this way, after the concrete is poured into the mold cavity 6, through the cooperation of the hydraulic cylinder 3 and manual labor or other hydraulic equipment, several steel bars can slide in the placement groove 21 and the slide 22 and can switch between the placement groove 21 and the slide 22, thereby realizing the irregular vertical or horizontal movement of the steel bar mesh in the mold cavity 6. The movement of the steel bar mesh will create disturbance and compaction of the concrete in the mold cavity 6, ensuring that the concrete can be evenly distributed in the mold cavity 6 and tightly wrap the steel bar mesh, thereby improving the structural strength of the precast composite slab after molding.

[0044] Furthermore, the bottom of the chute 22 is higher than the height of the concrete inside the mold cavity 6, which can prevent concrete from overflowing from the chute 22 to the outside of the mold cavity 6 to the greatest extent, thus preventing excessive concrete loss or concrete from covering the side of the side mold 2 that contacts the mold platform 1, making it difficult to dismantle the side mold 2. The inner height of the chute 22 is greater than the outer diameter of the reinforcing bar 8, leaving room for vertical movement of the reinforcing bar 8 when it moves horizontally in the chute 22, avoiding excessive contact between the chute 22 and the reinforcing bar 8, and improving the smoothness of the horizontal movement of the reinforcing bar 8.

[0045] When using the steel mesh 8 to disturb and compact the concrete, on the one hand, the steel bars 8 located in the placement groove 21 or chute 22 will limit and guide the steel mesh 8, thereby effectively preventing the steel bars 8 from shifting to the outside of the side formwork 2 or causing a large impact on the side formwork 2 during movement. This ensures the fixation of the side formwork 2 on the formwork platform 1, and also ensures that the structure and dimensions of the mold cavity 6 can maintain the preset state. On the other hand, the steel mesh 8 formed by several steel bars 8 is used to disturb and compact the concrete in the mold cavity 6 without the need for external tools. This avoids interference between external tools and the steel mesh 8 or truss 9, thereby effectively improving the disturbance and compaction effect of the concrete. This ensures that the concrete can be evenly distributed in the mold cavity 6 and that the air introduced during the pouring process is expelled, thus improving the compaction effect of the concrete and the operation efficiency.

[0046] After the concrete is disturbed and compacted by the steel mesh 8, the hydraulic cylinder 3 retracts slightly, so that the top of the horizontal end of the support plate 5 is slightly lower than the bottom of the chute 22. Then the steel mesh 8 is pushed and pulled horizontally. When the steel mesh 8 moves to the junction of the chute 22 and the placement groove 21, the steel mesh 8 will automatically fall into the placement groove 21 and contact the top of the horizontal end of the support plate 5 again. The method of the support plate 5 descending first and the steel mesh 8 moving later eliminates the need to align the steel mesh 8 with the placement groove 21, which can realize the rapid reset of the steel mesh 8 and ensure that the steel mesh 8 is in the mold cavity 6 and in the middle of the concrete, thereby improving the pre-embedding effect of the steel mesh 8 in the concrete.

[0047] See Figure 1 and Figure 3At least one connecting strip 7 is provided between a pair of support plates 4. The connecting strip 7 is perpendicular to the support plate 4. Two grooves 72 are provided at the bottom of the connecting strip 7, and a slide bar 40 is provided at the top of the support plate 4. The two grooves 72 of one connecting strip 7 are respectively fitted onto the outside of the slide bar 40 at the top of the two support plates 4, so that the connecting strip 7 can slide smoothly on the support plate 4. When there are many connecting strips 7, adjacent connecting strips 7 are spaced apart and can be connected by connecting rods. At least two limiting units are provided at the bottom of the connecting strip 7. The limiting unit includes a pair of limiting plates 71. The truss 9 outside the steel bar 8 is locked between the pair of limiting plates 71. The truss 9 can move vertically under the clamping of the pair of limiting plates 71. The length of the limiting plate 71 is greater than the height that the truss 9 can rise.

[0048] See Figure 5 When the reinforcing bar 8 moves to the junction of the placement groove 21 and the slide 22, pushing the truss 9 will turn the reinforcing bar 8 from the placement groove 21 to the slide 22. Furthermore, under the limiting action of the limiting unit, when the reinforcing bar 8 is aligned with the slide 22, pushing the connecting bar 7 will cause the truss 9, which is clamped by the limiting plate 71 of the limiting unit, to move synchronously with the connecting bar 7 after the connecting bar 7 has a horizontal displacement. The connecting bar 7 and the support plate 4 can slide more smoothly with the cooperation of the groove 72 and the slide 40. In other words, when it is necessary to push the reinforcing bar 8 mesh to produce horizontal displacement, the connecting bar 7 at the top should be pushed first. This can avoid collisions between manpower or other hydraulic equipment and the side mold 2 when pushing the truss 9, and also improve the convenience of operation. This allows for more precise control of the range and speed of the horizontal movement of the reinforcing bar 8.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A precast composite slab forming device, characterized in that, It includes a mold platform (1) and two pairs of side molds (2) provided on the mold platform (1). The side molds (2) are provided with a plurality of placement grooves (21), and the ends of the reinforcing bars (8) are inserted into the placement grooves (21). The mold table (1) is provided with a pair of hydraulic cylinders (3), the push rod of the hydraulic cylinder (3) is provided with a support plate (4), the bottom of the support plate (4) is provided with several L-shaped support plates (5), the end of the steel bar (8) is located at the top of the horizontal end of the support plate (5), and the hydraulic cylinder (3) pushes the support plate (4) and the support plate (5) to move back and forth in the vertical direction; The support plate (4) extends along the length direction of the side mold (2); Several of the trays (5) are spaced apart at the bottom of the support plate (4) and correspond one-to-one with several of the placement slots (21). The vertical end of the tray (5) is parallel to the push rod of the hydraulic cylinder (3), and the horizontal end of the tray (5) is parallel to the mold table (1). A pair of support plates (4) are arranged in parallel, and the pair of support plates (4) are connected by at least one connecting strip (7). At least two limiting units are provided at the bottom of the connecting strip (7). The limiting unit includes a pair of limiting plates (71). The pair of limiting plates (71) are located on both sides of the connecting strip (7) and clamp the truss (9) outside the steel bar (8). The placement groove (21) is opened in the vertical direction, and the side mold (2) is also provided with a plurality of sliding grooves (22) corresponding one-to-one with the placement groove (21). The sliding grooves (22) are opened in the horizontal direction and communicate with the placement groove (21). The bottom of the connecting strip (7) is provided with a groove (72), and the top of the support plate (4) is provided with a slide (40). The groove (72) covers the top of the slide (40), and relative sliding can occur between the groove (72) and the slide (40). Two pairs of side molds (2) enclose a rectangular mold cavity (6), and several steel bars (8) are tied in a mesh inside the mold cavity (6). The ends of the steel bars (8) pass through the placement groove (21) and extend to the outside of the mold cavity (6).

2. The precast composite slab forming device according to claim 1, characterized in that, The inner wall of the placement groove (21) is in contact with the outer wall of the reinforcing bar (8), and the end of the reinforcing bar (8) passes through the placement groove (21) and is in contact with the top of the horizontal end of the tray (5).

3. The precast composite slab forming device according to claim 1, characterized in that, The length of the limiting plate (71) is greater than the moving height of the reinforcing bar (8).

4. The precast composite slab forming device according to claim 3, characterized in that, The bottom of the chute (22) is higher than the height of the concrete in the mold cavity (6), and the inner height of the chute (22) is greater than the outer diameter of the reinforcing bar (8); The top of the placement groove (21) is connected to the top of the side mold (2), and the slide groove (22) is located on the side wall of the side mold (2) and there is a distance between it and the top of the side mold (2).

5. A precast composite slab forming device according to any one of claims 1-4, characterized in that, The two adjacent side molds (2) are locked together by bolts (23), the side molds (2) are fixed to the mold platform (1) by magnetic boxes (24), and the magnetic boxes (24) are magnetically attracted to the mold platform (1).

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