Combined core mold for hollow floor system
By designing a detachable core mold shell and groove structure on the hollow floor slab core mold, combined with the design of perforations and through slots, the floating and disturbance problems of the core mold during the pouring process are solved, achieving higher construction stability and quality.
Patent Information
- Application Number
- CN202520539319.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-26
AI Technical Summary
During the construction of existing hollow core slabs, the core mold is prone to floating or disturbance due to the influence of the vibrator, resulting in poor construction quality.
The design employs two detachably connected core mold shells with transverse and longitudinal grooves on the shell surfaces. Combined with the design of perforations and through slots, the core mold position is fixed by rib beam reinforcement, and the contact area between the concrete and the core mold is increased to improve stability.
This effectively reduces the floating and disturbance of the core mold during the pouring process, improving the construction quality and stability of the hollow floor slab.
Smart Images
Figure CN223937648U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hollow floor slab construction technology, and in particular to a composite core mold for hollow floor slabs. Background Technology
[0002] With the rapid development of the construction industry, modern buildings have placed higher demands on floor height, self-weight, large spaces, flexible partitions, and earthquake resistance. Cast-in-place hollow core slabs, a new technology, integrate a novel and effective structural concept into architecture, breaking away from all traditional structural models and making its mechanical properties more rational. In recent years, hollow core slab designs have gained worldwide popularity due to their superior architectural functions and excellent structural performance, and are being applied in all large-span, high-load, and large-space public buildings, residential buildings, and floor slab structures.
[0003] In existing technology, the cast-in-place hollow floor slab mainly consists of the following five parts: the lower reinforcement of the floor slab, the middle rib beam, the middle hollow core mold, the upper reinforcement of the floor slab, and the cast-in-place concrete. The construction steps of the hollow floor slab are as follows: first, the floor slab formwork is erected, then the lower reinforcement mesh of the floor slab is laid; next, the middle rib beam reinforcement is tied; the hollow core mold is laid between the rib beam reinforcement; the upper reinforcement of the floor slab is laid; and finally, the concrete is poured.
[0004] Most existing hollow floor slabs are lightweight. During construction, when pouring concrete and using vibrators to remove air from the concrete, the hollow core mold tends to float upwards and move left and right, resulting in poor quality of the hollow floor slabs produced. There is room for improvement. Utility Model Content
[0005] In order to improve the stability of the core mold and reduce the occurrence of upward floating and left-right disturbance of the core mold during the concrete pouring process, this application provides a hollow floor slab combined core mold.
[0006] The composite core mold for hollow floor slabs provided in this application adopts the following technical solution:
[0007] A hollow floor slab composite core mold mainly includes two detachably connected core mold shells. The two core mold shells are arranged in the same proportion. The surface of each core mold shell is provided with a transverse groove and a longitudinal groove.
[0008] The outer side of the core mold shell near the bottom is integrally formed with a connecting edge, and the connecting edge is provided with a number of first insertion holes for the rod of the bolt to pass through.
[0009] The core mold shell has a drain hole in the middle for concrete to flow out. The drain hole is set inward along the direction close to the connecting edge, and the drain hole is located at the intersection of the transverse groove and the longitudinal groove.
[0010] By adopting the above technical solution, in the actual construction of hollow floor slabs, two core mold shells can be connected to form a complete composite core mold. Through the horizontal and vertical grooves on the core mold shell, operators can embed the reinforcing steel ribs used to fix the core mold into these grooves. This embeds the reinforcing steel ribs into the grooves, restricting the position of the core mold. During concrete pouring, this reduces the lateral movement of the composite core mold due to the influence of the vibrator. The through-channels allow concrete to flow to the bottom of the core mold during pouring, increasing the contact area between the concrete and the core mold. Furthermore, because the perforations are recessed towards the connecting edge, the concrete within the perforation groove exerts downward pressure on the inner wall of the perforation, improving the stability of the core mold in the concrete and reducing upward floating during pouring.
[0011] Preferably, a connecting protrusion is integrally formed on the inner wall of each of the leak holes near the bottom, and the connecting protrusion has several second insertion holes for the rod of a bolt to pass through.
[0012] By adopting the above technical solution and setting the connecting convex ring, the middle position of the combined core mold can be fixed, reducing the occurrence of displacement and misalignment of the two core mold shells during concrete pouring.
[0013] Preferably, the four side walls of the core mold housing are respectively provided with four trapezoidal grooves in the middle part, and the inner wall of each trapezoidal groove is inclined inward along the direction close to the connecting edge;
[0014] Four through slots are provided through the connecting edge, and the four through slots are respectively located at the bottom of the four trapezoidal slots.
[0015] By adopting the above technical solution, after the concrete is poured, it fills the four trapezoidal grooves, which further increases the contact area between the concrete and the core mold. At the same time, the concrete filling the four trapezoidal grooves can exert downward pressure on the inner walls of the four trapezoidal grooves, which can further improve the stability of the combined core mold in the vertical direction. The through-groove design facilitates the flow of concrete to the bottom of the core mold through the trapezoidal grooves and through-groove, reducing the occurrence of incomplete filling of concrete during the pouring process.
[0016] Preferably, the core mold housing is divided into four sub-modules by the transverse groove and the longitudinal groove, and the middle part of each of the four sub-modules is provided with a filling groove.
[0017] By adopting the above technical solution and setting four filling grooves, the contact area between the concrete and the core mold can be further increased. At the same time, the concrete filled in the filling grooves can exert downward pressure on the core mold shell, which can further improve the stability of the combined core mold in the vertical direction.
[0018] Preferably, each of the four corners of the core mold housing is provided with a vertical connecting groove, and each of the four sub-modules is provided with a horizontal connecting groove. The two ends of the horizontal connecting groove are respectively connected to the drain hole and the vertical connecting groove.
[0019] By adopting the above technical solution, the setting of connecting horizontal and vertical grooves facilitates the filling of concrete along the leakage hole, connecting vertical groove, and connecting horizontal groove into the filling groove, connecting vertical groove, and connecting horizontal groove on the core mold shell below, reducing the occurrence of incomplete concrete filling.
[0020] Preferably, notches are provided at each of the four corners of the connecting edge.
[0021] By adopting the above technical solution, the notches at the four corners of the connecting edge facilitate the flow of fluid concrete to the lower part of the composite core mold during the concrete pouring process.
[0022] Preferably, the core mold housing is arranged in an inward-receding shape along the direction away from the connecting edge.
[0023] By adopting the above technical solution, and by setting the core mold housing in an inward-receding manner away from the connecting edge, it is convenient for operators to stack the core mold housing during transportation.
[0024] In summary, the hollow floor slab composite core mold of this application has at least one of the following beneficial technical effects:
[0025] 1. By setting transverse and longitudinal grooves on the core mold shell, operators can embed the ribs used to fix the core mold into the transverse and longitudinal grooves. This allows the ribs to be partially embedded in the grooves, thus restricting the position of the core mold. During concrete pouring, this reduces the lateral movement of the composite core mold caused by the vibrator. Furthermore, the through-slots allow concrete to flow to the bottom of the core mold during pouring, increasing the contact area between the concrete and the core mold. Additionally, the inward-curving design of the perforations near the connecting edges creates downward pressure on the inner wall of the perforations, improving the stability of the core mold in the concrete and reducing upward floating during pouring.
[0026] 2. After concrete pouring, the concrete fills the four trapezoidal grooves, further increasing the contact area between the concrete and the core mold. Simultaneously, the concrete filling the four trapezoidal grooves exerts downward pressure on the first, second, and third inner walls of the grooves, further enhancing the vertical stability of the composite core mold. The through-grooves facilitate the flow of concrete to the bottom of the core mold, reducing the likelihood of incomplete filling during the pouring process. Attached Figure Description
[0027] Figure 1 This is a schematic diagram illustrating the overall structure of the combined core mold in an embodiment of this application.
[0028] Figure 2 This is a schematic diagram illustrating the overall structure of a single core mold housing according to an embodiment of this application.
[0029] Figure 3 This is a schematic diagram illustrating the internal cross-section of the core mold in an embodiment of this application.
[0030] Figure 4 yes Figure 3 A magnified schematic diagram of the structure at point A in the middle.
[0031] Explanation of reference numerals in the attached drawings: 1. Core mold housing; 11. Transverse groove; 12. Longitudinal groove; 13. Leakage hole; 14. Connecting protrusion ring; 141. Second insertion hole; 15. Sub-module; 16. Filler groove; 17. Connecting vertical groove; 18. Connecting horizontal groove; 19. Trapezoidal groove; 2. Connecting edge; 21. First insertion hole; 22. Through groove; 23. Notch. Detailed Implementation
[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0033] Example
[0034] This application discloses a composite core mold for hollow floor slabs. (Refer to...) Figures 1-4 It mainly includes two detachably connected core mold shells 1. The two core mold shells 1 are set in the same proportion, and both core mold shells 1 are integrally cast by mold using fireproof material.
[0035] The surface of the core mold shell 1 is provided with transverse grooves 11 and longitudinal grooves 12; the outer side of the core mold shell 1 near the bottom is integrally formed with a connecting edge 2, and the connecting edge 2 is provided with a number of first insertion holes 21 for the rods of bolts to pass through; the middle part of the core mold shell 1 is provided with a drain hole 13 for concrete to flow out, the drain hole 13 is set inward along the direction close to the connecting edge 2, and the drain hole 13 is located at the intersection of the transverse grooves 11 and the longitudinal grooves 12.
[0036] In the actual construction of hollow core slabs, two core mold shells 1 can be connected to form a complete composite core mold. Through the transverse grooves 11 and longitudinal grooves 12 on the core mold shell 1, operators can embed the reinforcing steel bars for fixing the core mold into the transverse grooves 11 and longitudinal grooves 12. This allows the reinforcing steel bars to be partially embedded in the transverse grooves 11 and longitudinal grooves 12, thus restricting the position of the core mold. During concrete pouring, this reduces the lateral disturbance of the composite core mold caused by the vibrator. The through groove 22 allows concrete to flow to the bottom of the core mold during pouring, increasing the contact area between the concrete and the core mold. Furthermore, since the drain hole 13 is recessed along the direction close to the connecting edge 2, the concrete in the groove of the drain hole 13 exerts downward pressure on the inner wall of the drain hole 13, improving the stability of the core mold in the concrete and reducing the upward floating of the core mold during pouring.
[0037] It should be noted that in this embodiment, there are four first insertion holes 21, and the four first insertion holes 21 are located at the four corners of the connecting edge 2. When assembling the combined core mold through the two core mold housings 1, the operator can fit the connecting edge 2 of the two core mold housings 1 together and complete the connection between the two core mold housings 1 by bolts and nuts.
[0038] Reference Figure 3 and Figure 4 The inner wall of the vent 13 near the bottom is integrally formed with a connecting protrusion 14, and the connecting protrusion 14 has several second insertion holes 141 for the rod of the bolt to pass through.
[0039] By setting the connecting convex ring 14, the middle position of the combined core mold can be fixed, reducing the occurrence of displacement or misalignment of the two core mold shells 1 during concrete pouring.
[0040] Reference Figure 2 The core mold housing 1 has four trapezoidal grooves 19 in the middle of its four side walls. The three inner walls of the trapezoidal grooves 19 are inclined inward along the direction close to the connecting edge 2. Four through grooves 22 are opened through the connecting edge 2. The four through grooves 22 are located at the bottom of the four trapezoidal grooves 19 respectively.
[0041] After the concrete is poured, it fills the four trapezoidal grooves 19, further increasing the contact area between the concrete and the core mold. Simultaneously, the concrete filling the four trapezoidal grooves 19 exerts downward pressure on the first, second, and third inner walls of the grooves, further enhancing the stability of the composite core mold in the vertical direction. The through-groove 22 facilitates the flow of concrete through the trapezoidal grooves 19 and through-groove 22 to the bottom of the core mold, reducing the occurrence of incomplete filling during the pouring process.
[0042] Reference Figure 2 The core mold housing 1 is divided into four sub-modules 15 by transverse grooves 11 and longitudinal grooves 12, and the middle part of each of the four sub-modules 15 is provided with a filling groove 16.
[0043] By setting four filling grooves 16, the contact area between the concrete and the core mold can be further increased. At the same time, the concrete filled in the filling grooves 16 can exert downward pressure on the core mold shell 1, which can further improve the stability of the combined core mold in the vertical direction.
[0044] Reference Figure 2 Each of the four corners of the core mold housing 1 is provided with a connecting vertical groove 17, and each of the four sub-modules 15 is provided with a connecting horizontal groove 18. The two ends of the connecting horizontal groove 18 are connected to the drain hole 13 and the connecting vertical groove 17, respectively.
[0045] By connecting the horizontal groove 18 and the vertical groove 17, it is easy for concrete to fill the filling groove 16, the vertical groove 17 and the horizontal groove 18 on the core mold shell 1 located below, along the leakage hole 13, the vertical groove 17 and the horizontal groove 18, thereby reducing the occurrence of incomplete concrete filling.
[0046] Reference Figure 2 Notches 23 are provided at each of the four corners of the connecting edge 2. Through the notches 23 at the four corners of the connecting edge 2, the fluid concrete can flow to the lower part of the composite core mold during the concrete pouring process.
[0047] Reference Figure 1 The core mold housing 1 is set inward in the direction away from the connecting edge 2. By setting the core mold housing 1 inward in the direction away from the connecting edge 2, it is easy for operators to stack the core mold housing 1 during transportation.
[0048] The implementation principle of the hollow floor slab composite core mold in this application embodiment is as follows: By setting the transverse groove 11 and longitudinal groove 12 on the core mold shell 1, the operator can embed the rib steel bars used to fix the core mold into the transverse groove 11 and longitudinal groove 12, so that the rib steel bars are partially embedded in the transverse groove 11 and longitudinal groove 12. The rib steel bars themselves restrict the position of the core mold, reducing the lateral disturbance of the composite core mold due to the influence of the vibrator during concrete pouring. Through the setting of the through groove 22, during concrete pouring, the concrete can flow to the bottom of the core mold through the through groove 22, increasing the contact between the concrete and the core mold. The contact area between the core mold and the concrete is increased. Because the perforation 13 is recessed along the direction close to the connecting edge 2, the concrete within the perforation 13 exerts downward pressure on the inner wall of the perforation 13, improving the stability of the core mold within the concrete and reducing upward floating during pouring. After pouring, the concrete fills the four trapezoidal grooves 19, further increasing the contact area between the concrete and the core mold. Simultaneously, the concrete filling the four trapezoidal grooves 19 exerts downward pressure on the first, second, and third inner walls of the four grooves, further enhancing the stability of the combined core mold in the vertical direction. The through-groove 22 facilitates the flow of concrete through the trapezoidal grooves 19 and through-groove 22 to the bottom of the core mold, reducing the occurrence of incomplete filling during pouring.
[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 composite core mold for hollow floor slabs, characterized in that, It includes two detachably connected core mold housings (1), the two core mold housings (1) are arranged in the same proportion, and the surface of each core mold housing (1) is provided with a transverse groove (11) and a longitudinal groove (12); The outer side of the core mold housing (1) near the bottom is integrally formed with a connecting edge (2), and the connecting edge (2) is provided with a number of first insertion holes (21) for the rod of the bolt to pass through. The core mold shell (1) is provided with a drain hole (13) for concrete to flow out in the middle. The drain hole (13) is arranged in an inward shape along the direction close to the connecting edge (2), and the drain hole (13) is located at the intersection of the transverse groove (11) and the longitudinal groove (12).
2. The hollow floor slab composite core mold according to claim 1, characterized in that, Each of the leak holes (13) has an integrally formed connecting protrusion ring (14) on its inner wall near the bottom. The connecting protrusion ring (14) has several second insertion holes (141) for the rod of the bolt to pass through.
3. A hollow floor slab composite core mold according to claim 2, characterized in that, The core mold housing (1) has four trapezoidal grooves (19) respectively provided in the middle of the four side walls, and the inner walls of the trapezoidal grooves (19) are all inclined inward along the direction close to the connecting edge (2); Four through slots (22) are provided on the connecting edge (2), and the four through slots (22) are respectively located at the bottom of the four trapezoidal slots (19).
4. A hollow floor slab composite core mold according to claim 3, characterized in that, The core mold housing (1) is divided into four sub-modules (15) by the transverse groove (11) and the longitudinal groove (12), and the middle part of the four sub-modules (15) is respectively provided with a filling groove (16).
5. A hollow floor slab composite core mold according to claim 4, characterized in that, The core mold housing (1) is provided with connecting vertical grooves (17) at each of its four corners, and the four sub-modules (15) are provided with connecting horizontal grooves (18). The two ends of the connecting horizontal grooves (18) are respectively connected to the leakage hole (13) and the connecting vertical grooves (17).
6. A hollow floor slab composite core mold according to claim 5, characterized in that, Notches (23) are provided at the four corners of the connecting edge (2).
7. A hollow floor slab composite core mold according to claim 6, characterized in that, The core mold housing (1) is set inward in a direction away from the connecting edge (2).