Inflation split type concrete pore-forming core mold with square outside and round inside and manufacturing method of split type concrete pore-forming core mold

Abstract

The invention discloses an outside-square and inside-round air-flushing split type concrete pore-forming core mold and a manufacturing method thereof, a first core mold comprises a lower half core mold A and an upper half core mold A, a semicircular structure A is arranged on the lower half core mold A and the upper half core mold A, a transverse convex rib A is arranged on the semicircular structure A, and the lower half core mold A and the upper half core mold A are clamped together to form an outside-square and inside-round hollow sealing structure A; the second core mold comprises a lower half core mold B and an upper half core mold B, a plurality of semicircular structures B are arranged on the lower half core mold B and the upper half core mold B in parallel respectively, transverse convex ribs B are arranged on the semicircular structures B, and the lower half core mold B and the upper half core mold B are clamped together to form a plurality of groups of hollow sealing structures B with square exteriors and round interiors. The structure is novel and ingenious, the transportation cost and raw material consumption are greatly reduced, the compressive strength is improved, and the stability of the concrete structure is improved. The method is applied to green and environment-friendly buildings, fabricated houses, large-bay houses, underground garages, bridges and the like.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to an outer square inner circle aerated split concrete hole-forming core mould and a manufacturing method thereof. Background Art

[0002] With the development of economy and the improvement of living standards, people have higher requirements for green and environmentally friendly buildings, prefabricated houses, bridges, large-span houses, sound insulation, heat insulation, insulation, earthquake resistance, energy saving, economy, etc. The common ordinary reinforced concrete beams and slabs can no longer meet the needs in this regard, so hollow floors came into being. The hole-forming core mold (filler for cast-in-place concrete hollow floors) is an important component of the hollow floor. The volume hollow ratio of the hole-forming core mold cast-in-place hollow floor cannot be greater than 50% and cannot be less than 25%.

[0003] The hole forming core mold in the prior art has the following defects: 1. The porous core molds made of gypsum and foam materials are difficult to meet the requirements of the JG / T352-2017 construction standard in terms of fire resistance and compressive load resistance. The surface of the core mold needs to withstand the pressure of concrete when pouring concrete. The core mold is greatly deformed or even damaged, and it is large in size, inconvenient to transport, and has high transportation costs.

[0004] 2. The price of the hole-forming core mold made of plastic is higher than that of gypsum and foam materials, and the thin plastic has low strength and is easy to deform. In order to ensure the strength of the hole-forming core mold, more plastic is needed to make the wall of the hole-forming core mold thicker, but the excessive weight of the hole-forming core mold has an impact on the structure of the hollow floor. Therefore, the lateral compressive load of the hole-forming core mold often fails to meet the requirements of the JG / T352-2017 building standard; moreover, the hole-forming core molds made of plastic are mostly one-piece molded structural parts, which are large in size and have high transportation costs.

[0005] 3. The existing hole-forming core molds are in the shape of cubes and cuboids, and the surfaces in contact with concrete are all flat, which has the following disadvantages: ① When pouring concrete, due to the poor flow of concrete, the bottom surface of the hole-forming core mold is prone to holes, which affects the stability of the concrete structure. ② When pouring concrete, the upper and lower surfaces of the hole-forming core mold are in surface contact with the concrete, which is a flat plate structure with poor compressive performance. A rectangular hollow hole is formed in the middle of the concrete. Under load and dynamic loads such as earthquakes, the concrete stress in the rectangular hollow hole is relatively concentrated, which affects the safety of the structure.

[0006] 4. The size of the hole-forming core mold is determined according to the hollow size required by the concrete structure design. Different types of hollow floor slabs have hole-forming core molds of different specifications, resulting in a large variety of molds for producing hole-forming core molds and high mold costs. Summary of the invention

[0007] The purpose of the present invention is to solve the above technical problems and to provide a square outer and round inner aerated split concrete hole-forming core mold and a manufacturing method thereof.

[0008] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by the present invention is: an outer square inner circle aerated split concrete hole-forming core mold and a manufacturing method, characterized in that: the first core mold includes a lower core mold A and an upper core mold A, the lower core mold A and the upper core mold A are both provided with a semicircular structure A, the semicircular structure A is provided with a plurality of transverse convex ribs A, the semicircular structure A is provided with arc heads A at both ends, the upper core mold A is provided with a valve core A, the lower core mold A and the upper core mold A are both provided with a connecting flange A, the connecting flange A is provided with a convex stopper A and a concave stopper A, the lower core mold A and the upper core mold A are clamped together, and are bonded by environmentally friendly plastic bonding special glue or hot melt bonding to form an outer square inner circle hollow sealing structure A, and compressed air A is provided in the hollow sealing structure A; The second core mold includes a lower core mold B and an upper core mold B, wherein two or more semicircular structures B are respectively arranged in parallel on the lower core mold B and the upper core mold B, wherein the semicircular structure B is provided with a plurality of transverse ribs B, and arc heads B are arranged at both ends of the parallel semicircular structures B, and the two ends of the adjacent semicircular structures B are connected by a through cavity; a valve core B is arranged on the upper core mold B, and a connecting flange B is arranged on the lower core mold B and the upper core mold B, and a convex stopper B and a concave stopper B are arranged on the connecting flange B, and a structural column is arranged in the middle of the lower core mold B and the upper core mold B, and a plurality of cross grooves, cross protrusions and a plurality of convex stoppers C and concave stoppers C are arranged on the structural column; The lower core mold B and the upper core mold B are clamped together, bonded by environmentally friendly plastic bonding glue or hot-melt bonding, to form two or more groups of hollow sealing structures B with square outside and round inside, and compressed air B is provided in the hollow sealing structure B; The first core mold and the second core mold are arranged in parallel in a transverse direction, and the first core mold and the second core mold are respectively provided with a first steel bar protection member in a vertically parallel manner on the front and bottom surfaces; The method for making a hole forming core mold comprises the following steps: Step 1: Prepare the lower core mold A and the lower core mold B by using the vacuum forming process; Step 2: Take half of the lower core mold A and lower core mold B respectively, punch air hole A on the valve core A of the lower core mold A to obtain the upper core mold A, and punch air hole B on the valve core B of the lower core mold B to obtain the upper core mold B; Step 3: Overlap the lower core mold A and the upper core mold A in the same direction, the number of each bundle is 50 to 100, and overlap the lower core mold B and the upper core mold B in the same direction, the number of each bundle is 50 to 100; Step 4: transport the tied hole-forming core mold parts and the first steel bar protection parts to the construction unit; Step 5: Use a glue gun to apply environmentally friendly plastic bonding glue to the concave stopper A of the lower core mold A, and snap-fit ​​and bond the upper core mold A and the lower core mold A together to obtain a first core mold; use a glue gun to apply environmentally friendly plastic bonding glue to the concave stopper B, the concave stopper C and the cross groove of the lower core mold B, and also apply environmentally friendly plastic bonding glue to the pouring guide pipe mouth, snap-fit ​​and bond the upper core mold B and the lower core mold B together to obtain a second core mold; Step 6: Place the first core mold and the second core mold that are bonded together for 24 to 30 hours, and then press compressed air into the first core mold and the second core mold that are bonded together. When the internal air pressure reaches 1 to 5 KPa, the pressurization is completed, and the first core mold and the second core mold are respectively obtained.

[0009] Preferably, the transverse convex rib A and the transverse convex rib B are both configured as a cavity structure, thereby increasing the spatial volume of the semicircular structure.

[0010] Preferably, a plurality of semicircular, U-shaped or rectangular grooves are arranged in parallel on the first steel bar protection member.

[0011] Preferably, the first steel bar protection member is bonded to the first core mold and the second core mold by using environmentally friendly plastic bonding special glue or hot-melt bonding.

[0012] Preferably, a casting guide tube is provided on the second core mold.

[0013] Preferably, the corners of the first core mold and the second core mold are both provided with arcs.

[0014] Preferably, the first core mold, the second core mold and the first steel bar protection member are made of transparent plastic or plastic, and the wall thickness of the first core mold and the second core mold is 0.4~1.5mm.

[0015] Preferably, the outer surfaces of the first core mold and the second core mold are provided with a plurality of reinforcing ribs to increase the overall strength of the core mold.

[0016] Preferably, a cross-shaped support assembly is respectively provided inside the cavities of the first core mold and the second core mold to improve the compressive strength of the core mold.

[0017] Preferably, the support assembly includes a transverse support member and a longitudinal support member, and the middle parts of the lower core mold A, the upper core mold A and the lower core mold B, and the upper core mold B are respectively evenly distributed with a plurality of inwardly protruding protrusions, and the two ends of the longitudinal support member are respectively arranged on two opposite protrusions; the inner sides of the edges of the lower core mold A, the upper core mold A and the lower core mold B, and the upper core mold B are respectively provided with a plurality of groups of relative arc grooves, and the two ends of the transverse support member are respectively arranged in the arc grooves.

[0018] Compared with the traditional structure, the invention has the following beneficial effects: 1. The first core mold and the second core mold adopt a semicircular assembly structure, which is convenient for transportation and the loading capacity is increased by more than ten times. They are assembled into a hollow sealing structure with a square outside and a circle inside, which has uniform force and large bearing capacity.

[0019] 2. The first core mold and the second core mold are provided with transverse convex ribs, which increase the spatial volume of the semicircular structure, increase the compressive strength, and increase the bonding force between the concrete and the core mold; a number of reinforcing ribs are arranged on the outer surfaces of the first core mold and the second core mold to increase the overall strength of the core mold, and a cross-shaped support assembly is arranged inside the cavity to further improve the compressive strength of the core mold.

[0020] 3. The steel bar protection part is provided with grooves, so that the steel bar in the groove is 20~25mm away from the top and bottom surfaces of the core mold, ensuring that there is concrete around the steel bar to avoid steel bar corrosion; the steel bar protection part also has the function of assembly connection, and can be combined and bonded at will according to size requirements, reducing the variety of molds and reducing the mold manufacturing cost.

[0021] 4. Compressed air is injected into the first core mold and the second core mold to further improve the thermal insulation performance, heat insulation performance, sound insulation performance and compressive strength.

[0022] 5. The transparent plastic or plastic used in the present invention has flame retardant properties that reach standard grade B2 and meet the requirements of JG / T352-2017 building standards.

[0023] 6. The hole-forming core mold of the present invention has the highest compressive bearing capacity under the same wall thickness conditions; under the same compressive load, the hole-forming core mold of the present invention requires the smallest wall thickness, generally saving 65% to 75% of plastic compared to the rectangular core mold, greatly reducing the amount of raw materials used.

[0024] 7. The unique structure of the core mold of the present invention makes the concrete at the bottom of the core mold smoother during cast-in-place concrete, ensuring that the concrete at the bottom of the core mold is denser, thereby improving the stability of the concrete structure.

[0025] 8. The present invention forms a dense-ribbed arched cavity structure after the concrete is cavity-formed. Under the action of loads and dynamic loads such as earthquakes, the arched structure can better disperse stress along the components to avoid stress concentration, thereby increasing the stability of the structure.

[0026] 6. The core mold adopts the blister process, the product thickness is uniform, the production efficiency is high, the lower core mold and the upper core mold are produced by the same mold, the blister mold cost is 95% lower than the blow molding mold, the wall thickness of the produced core mold is only: 0.4~1.5mm, but the front and side compressive loads are greater than 1 kilonewton, which meets the requirements of JG / T352-2017 building standards, greatly reducing the amount of plastic used and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the front view of the first core mold in Example 1 of the present invention; Figure 2 This is a schematic diagram of a left side view of the first core mold of Example 1 of the present invention; Figure 3 for Figure 1 Middle AA section view; Figure 4 A three-dimensional diagram of the lower core mold A of Example 1 of the present invention; Figure 5 for Figure 1 Enlarged view of point E in the middle; Figure 6 This is a schematic diagram of the front view of the second core mold in Example 1 of the present invention; Figure 7 This is a schematic diagram of a left side view of the second core mold of Example 1 of the present invention; Figure 8 for Figure 6 Middle BB section view; Fig. 9 This is a schematic top view of the second core mold of Example 1 of the present invention; Fig.10 This is a three-dimensional diagram of the upper core mold B of Example 1 of the present invention; Fig.11 for Fig.10 Enlarged view of point F in the middle; Fig.12 It is a three-dimensional diagram of the first steel bar protection member in the present invention; Fig.13 This is one of the assembly diagrams of the present invention; Fig.14 This is a schematic diagram of the first core mold structure of Example 2 of the present invention; Fig.15 This is a schematic diagram of the structure of the first core mold after removing the upper core mold in Example 2 of the present invention; Fig.16 This is a schematic structural diagram of the lower core mold A of Example 2 of the present invention; Fig.17 This is a schematic diagram of the second core mold structure of Example 2 of the present invention; Fig.18 This is a schematic diagram of the structure of the second core mold after removing the upper core mold of Example 2 of the present invention; In the figure: 1. First core mold, 1-1. Lower core mold A, 1-1a. Semicircular structure A, 1-1b. Transverse rib A, 1-1c. Connecting flange A, 1-1d. Arc head A, 1-1e. Convex stopper A, 1-1f. Concave stopper A, 1-1g. Protrusion, 1-1h. Arc groove, 1-1i. Reinforcement rib, 1-2. Upper core mold A, 1-3. Valve core A, 1-3a. Valve core body A, 1-3b. Hose, 1-3. Inlet hole A, 2. Second core mold, 2-1. Lower core mold B, 2-2. Upper core mold B, 2-2a. Semicircular structure B, 2-2b. Transverse rib B, 2-2c. Connecting flange B , 2-2d. Casting guide tube, 2-2e. Through cavity, 2-2f. Arc head B, 2-2g. Structural column, 2-2h. Male stop B, 2-2i. Female stop B, 2-2j. Cross groove, 2-2k. Male stop C, 2-2m. Cross protrusion, 2-2n. Female stop C, 2-3. Valve core B, 2-3a. Valve core B, 3. First steel bar protection member, 3-1. Groove, 4. Support assembly, 4-1. Transverse support member, 4-2. Longitudinal support member. DETAILED DESCRIPTION

[0028] The present invention will be further described below.

[0029] Embodiment 1: refer to the attached Figure 1-13 , an outer square inner circle aerated split concrete hole-forming core mold and a manufacturing method, characterized in that: the first core mold 1 includes a lower core mold A1-1 and an upper core mold A1-2, the lower core mold A1-1 and the upper core mold A1-2 are both provided with a semicircular structure A1-1a, the semicircular structure A1-1a is provided with a plurality of transverse convex ribs A1-1b, the semicircular structure A1-1a is provided with arc heads A1-1d at both ends, the upper core mold A1-2 is provided with a valve core A1-3, the lower core mold A1-1 and the upper core mold A1-2 are both provided with a connecting flange A1-1c, the connecting flange A1-1c is provided with a convex stopper A1-1e and a concave stopper A1-1f The lower core mold A1-1 and the upper core mold A1-2 are clamped together and bonded by environmentally friendly plastic bonding glue or hot-melt bonding to form a hollow sealing structure A with an outer square and an inner circle, and compressed air A is provided in the hollow sealing structure A; The second core mold 2 includes a lower core mold B2-1 and an upper core mold B2-2, wherein two or more semicircular structures B2-2a are respectively arranged in parallel on the lower core mold B2-1 and the upper core mold B2-2, and the semicircular structure B2-2a is provided with a plurality of transverse convex ribs B2-2b, and arc heads B2-2f are arranged at both ends of the parallel semicircular structures B2-2a, and the two ends of adjacent semicircular structures B2-2a are connected by a through cavity 2-2e; a valve core B2-3 is arranged on the upper core mold B2-2, and connecting flanges B2-2c are arranged on the lower core mold B2-1 and the upper core mold B2-2, and the connecting flanges B2-2c are provided with convex stoppers B2-2h and concave stoppers B2-2i. The lower core mold B2-1 and the upper core mold B2-2 are both provided with a structural column 2-2g in the middle, and the structural column 2-2g is provided with a plurality of cross grooves 2-2j, a cross protrusion 2-2m and a plurality of convex stoppers C2-2k and concave stoppers C2-2n; the lower core mold B2-1 and the upper core mold B2-2 are snapped together, and are bonded by environmentally friendly plastic bonding special glue or hot-melt bonding to form two or more groups of hollow sealing structures B with outer square and inner circle, and compressed air B is provided in the hollow sealing structure B; The first core mold 1 and the second core mold 2 are arranged in parallel in a transverse direction, and the first core mold 1 and the second core mold 2 are respectively provided with a first steel bar protection member 3 in parallel in a vertical direction on the front and bottom surfaces thereof; The method for making a hole forming core mold comprises the following steps: Step 1: Prepare the lower core mold A1-1 and the lower core mold B2-1 by using the vacuum forming process; Step 2: Take half of the lower core mold A1-1 and the lower core mold B2-1, punch the air hole A1-3c on the valve core A1-3 of the lower core mold A1-1 to obtain the upper core mold A1-2, and punch the air hole B on the valve core B2-3 of the lower core mold B2-1 to obtain the upper core mold B2-2; Step 3: overlap the lower core mold A1-1 and the upper core mold A1-2 in the same direction, and the number of each bundle is 50 to 100; overlap the lower core mold B2-1 and the upper core mold B2-2 in the same direction, and the number of each bundle is 50 to 100; Step 4: transport the tied hole-forming core mold parts and the first steel bar protection part 3 to the construction unit; Step 5: Use a glue gun to apply environmentally friendly plastic bonding glue to the concave stop A1-1f of the lower core mold A1-1, and snap-fit ​​and bond the upper core mold A1-2 and the lower core mold A1-1 together to obtain a first core mold; use a glue gun to apply environmentally friendly plastic bonding glue to the concave stop B2-2i, the concave stop C2-2n and the cross groove 2-2j of the lower core mold B2-1, and also apply environmentally friendly plastic bonding glue to the mouth of the casting guide tube 2-2d, snap-fit ​​and bond the upper core mold B2-2 and the lower core mold B2-1 together to obtain a second core mold; Step 6: Place the first core mold and the second core mold that are bonded together for 24 to 30 hours, and then press compressed air into the first core mold and the second core mold that are bonded together. When the internal air pressure reaches 1 to 5 KPa, the pressurization is completed, and the first core mold 1 and the second core mold 2 are respectively obtained.

[0030] In the preferred embodiment, the transverse convex rib A1-1b and the transverse convex rib B2-2b are both configured as cavity structures, thereby increasing the spatial volume of the semicircular structure.

[0031] In this preferred embodiment, a plurality of semicircular, U-shaped or rectangular grooves are arranged in parallel on the first steel bar protection member 3 .

[0032] In this preferred embodiment, the first steel bar protection member 3 is bonded to the first core mold 1 and the second core mold 2 by using environmentally friendly plastic bonding special glue or hot-melt bonding.

[0033] In this preferred embodiment, a casting guide tube 2 - 2d is provided on the second core mold 2 .

[0034] In this preferred embodiment, the corners of the first core mold 1 and the second core mold 2 are both provided with arcs.

[0035] In this preferred embodiment, the first core mold 1, the second core mold 2 and the first steel bar protection member 3 are made of transparent plastic or plastic, and the wall thickness of the first core mold 1 and the second core mold 2 is 0.4~1.5mm.

[0036] Embodiment 2: As described in Embodiment 1, the outer square inner circle aerated split concrete hole forming core mold and the manufacturing method thereof, a plurality of reinforcing ribs 1-1i are arranged on the outer surface of the first core mold 1 and the second core mold 2 to increase the overall strength of the core mold, such as Figure 14-18 As shown, a cross-shaped support assembly 4 is respectively arranged inside the cavity of the first core mold 1 and the second core mold 2, so as to further improve the compressive strength of the product.

[0037] The support assembly 4 includes a transverse support member 4-1 and a longitudinal support member 4-2. The middle parts of the lower core mold A1-1, the upper core mold A1-2 and the lower core mold B2-1 and the upper core mold B2-2 are evenly distributed with a plurality of inwardly protruding protrusions 1-1g, and the two ends of the longitudinal support member 4-2 are respectively sleeved on two opposite protrusions 1-1g; the lower core mold A1-1, the upper core mold A1-2 and the lower core mold B2-1, the upper core mold B2-2 are respectively uniformly provided with a plurality of inwardly protruding protrusions 1-1g. Several groups of relative arc grooves 1-1h are respectively arranged on the inner side of the edge of the half core mold B2-2, and the two ends of the transverse support member 4-1 are respectively arranged in the arc grooves 1-1h. After the lower half core mold A1-1 and the upper half core mold A1-2, the arc grooves 1-1h of the lower half core mold B2-1 and the upper half core mold B2-2 are engaged, wrapping the ends of the transverse support member 4-1, and the structural column 2-2g is provided with a notch corresponding to the transverse support member 4-1.

[0038] According to the inspection by the Hunan Provincial Building Materials Quality Supervision and Inspection Authorized Station, when the compressive load was loaded to 1.0kN, there were no through cracks or damage on the top, side walls and bottom of the product. The Φ30mm inserted vibration rod vibrated close to the surface for 1 minute without any through cracks or damage, which meets the requirements of national standards. According to the inspection by Zhejiang Huace Yuanjian Testing Co., Ltd., the product's combustion performance level reaches GB8624 B1 (C-s2, d0).

[0039] Embodiment 3: According to the structural design requirements, a second steel bar protection piece may or may not be pasted on the front and bottom surfaces of the first core mold 1 of Embodiment 1 or Embodiment 2, and is applied to hollow floor slabs of environmentally friendly buildings.

[0040] Embodiment 4: According to the structural design requirements, a third steel bar protection piece may or may not be pasted on the front and bottom surfaces of the second core mold 2 of embodiment 1 or embodiment 2, and is applied to hollow floor slabs of environmentally friendly buildings.

[0041] Embodiment 5: According to the structural design requirements, a fourth steel bar protection member is attached to the front and bottom surfaces of the second core molds 2 of multiple embodiments 1 or 2 for assembly, and is applied to hollow floor slabs or bridges of environmentally friendly buildings.

[0042] Embodiment 6: According to the structural design requirements, the fifth steel bar protection member is attached to the front and bottom surfaces of the first core molds 1 of multiple embodiments 1 or 2 for assembly and applied to hollow floor slabs of environmentally friendly buildings.

[0043] Embodiment 7: According to the structural design requirements, the sixth steel bar protection member is pasted on the front and bottom surfaces of multiple first core molds 1 of Embodiment 1 or Embodiment 2 and multiple second core molds 2 of Embodiment 1 or Embodiment 2 for assembly and application in hollow floor slabs of environmentally friendly buildings.

[0044] In specific implementation, the present invention uses the scientific principle of balanced pressure distribution on the outer wall of the inner cavity of a cylinder according to the characteristics of the arch structure load being evenly distributed along the components, having a large spanning capacity, having good stability and bearing capacity, and being widely applicable to materials, and assembles the first core mold and the second core mold into a hole-forming core mold with a semicircular structure and an outer square inner circle. After the concrete of the present invention is formed into a cavity, a dense-ribbed arch cavity structure is formed, which greatly enhances the structural strength of the building and improves the stability compared with the rectangular cavity formed by the original hole-forming core mold. It can resist external pressure and deformation, which makes the arch structure show better resistance in natural disasters such as earthquakes and storms.

[0045] The above embodiments of the present invention are merely examples to clearly illustrate the present invention, but are not intended to limit the protection scope of the present invention. All equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. An outer square inner circle aerated split concrete hole-forming core mold and a manufacturing method, characterized by: The first core mold (1) comprises a lower core mold A (1-1) and an upper core mold A (1-2), wherein the lower core mold A (1-1) and the upper core mold A (1-2) are both provided with a semicircular structure A (1-1a), wherein the semicircular structure A (1-1a) is provided with a plurality of transverse convex ribs A (1-1b), wherein both ends of the semicircular structure A (1-1a) are provided with arc heads A (1-1d), wherein the upper core mold A (1-2) is provided with a valve core A (1-3), wherein the lower core mold A (1-1) and the upper core mold A (1-2) are both provided with a connecting flange A (1-1c), wherein the connecting flange A (1-1c) is provided with a convex stopper A (1-1e), a concave stopper A (1-1f), and a concave stopper A (1-1f). ), the lower core mold A (1-1) and the upper core mold A (1-2) are clamped together and bonded by environmentally friendly plastic bonding glue or hot-melt bonding to form a hollow sealing structure A with a square outside and a round inside, and compressed air A is provided in the hollow sealing structure A; The second core mold (2) comprises a lower core mold B (2-1) and an upper core mold B (2-2), wherein two or more semicircular structures B (2-2a) are respectively arranged in parallel on the lower core mold B (2-1) and the upper core mold B (2-2), wherein the semicircular structure B (2-2a) is provided with a plurality of transverse convex ribs B (2-2b), and arc heads B (2-2f) are arranged at both ends of the parallel semicircular structures B (2-2a), and the two ends of adjacent semicircular structures B (2-2a) are connected by a through cavity (2-2e); a valve core B (2-3) is arranged on the upper core mold B (2-2), and connecting flanges B (2-2c) are both arranged on the lower core mold B (2-1) and the upper core mold B (2-2), and the connecting flanges B (2-2c) are provided with convex stoppers B (2-2h), concave stoppers B (2-2i) and concave stoppers B (2-2i) respectively. ), the lower core mold B (2-1) and the upper core mold B (2-2) are both provided with a structural column (2-2g) in the middle, and the structural column (2-2g) is provided with a plurality of cross grooves (2-2j), a cross protrusion (2-2m) and a plurality of convex stoppers C (2-2k) and concave stoppers C (2-2n); the lower core mold B (2-1) and the upper core mold B (2-2) are snapped together, and are bonded by environmentally friendly plastic bonding special glue or hot-melt bonding to form two or more groups of hollow sealing structures B with outer square and inner circle, and compressed air B is provided in the hollow sealing structure B; The first core mold (1) and the second core mold (2) are arranged in parallel in a transverse manner, and first steel bar protection members (3) are respectively arranged vertically and in parallel on the front and bottom surfaces of the first core mold (1) and the second core mold (2); The method for making a hole forming core mold comprises the following steps: Step 1: using a vacuum forming process to prepare a lower core mold A (1-1) and a lower core mold B (2-1); Step 2: Take half of the lower core mold A (1-1) and the lower core mold B (2-1), punch an air hole A (1-3c) on the valve core A (1-3) of the lower core mold A (1-1) to obtain an upper core mold A (1-2), and punch an air hole B on the valve core B (2-3) of the lower core mold B (2-1) to obtain an upper core mold B (2-2); Step 3: overlap the lower core mold A (1-1) and the upper core mold A (1-2) in the same direction, with the number of each bundle being 50 to 100; overlap the lower core mold B (2-1) and the upper core mold B (2-2) in the same direction, with the number of each bundle being 50 to 100; Step 4: transport the tied hole-forming core mold parts and the first steel bar protection part (3) to the construction unit; Step 5: Use a glue gun to apply environmentally friendly plastic bonding glue to the concave stopper A (1-1f) of the lower core mold A (1-1), and snap-fit ​​and bond the upper core mold A (1-2) and the lower core mold A (1-1) together to obtain a first core mold; use a glue gun to apply environmentally friendly plastic bonding glue to the concave stopper B (2-2i), the concave stopper C (2-2n) and the cross groove (2-2j) of the lower core mold B (2-1), and also apply environmentally friendly plastic bonding glue to the mouth of the casting guide tube (2-2d), snap-fit ​​and bond the upper core mold B (2-2) and the lower core mold B (2-1) together to obtain a second core mold; Step 6: Place the first core mold and the second core mold that have been bonded together for 24 to 30 hours, and then pressurize the first core mold and the second core mold that have been bonded together with compressed air. When the internal air pressure reaches 1 to 5 KPa, the pressurization is completed, and the first core mold (1) and the second core mold (2) are respectively obtained.

2. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 1 are characterized by: The transverse convex rib A (1-1b) and the transverse convex rib B (2-2b) are both configured as a cavity structure, thereby increasing the spatial volume of the semicircular structure.

3. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 1 are characterized by: The first steel bar protection member (3) is provided with a plurality of semicircular, U-shaped or rectangular grooves in parallel.

4. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 1 or 3, characterized in that: The first steel bar protection member (3) is bonded to the first core mold (1) and the second core mold (2) by using environmentally friendly plastic bonding special glue or hot-melt bonding.

5. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 1 are characterized by: The second core mold (2) is provided with a casting guide tube (2-2d).

6. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 1, characterized in that: The corners of the first core mold (1) and the second core mold (2) are both provided with circular arcs.

7. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 1, characterized in that: The first core mold (1), the second core mold (2) and the first steel bar protection piece (3) are made of transparent plastic or plastic, and the wall thickness of the first core mold (1) and the second core mold (2) is 0.4-1.5 mm.

8. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 1, characterized in that: The outer surfaces of the first core mold (1) and the second core mold (2) are provided with a plurality of reinforcing ribs (1-1i) to increase the overall strength of the core molds.

9. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 1, characterized in that: A cross-shaped support assembly (4) is respectively arranged inside the cavities of the first core mold (1) and the second core mold (2) to improve the compressive strength of the core molds.

10. The outer square inner circle aerated split concrete hole forming core mold and its manufacturing method according to claim 9, characterized in that: The support assembly (4) comprises a transverse support member (4-1) and a longitudinal support member (4-2); a plurality of inwardly protruding protrusions (1-1g) are evenly distributed in the middle of the lower core mold A (1-1), the upper core mold A (1-2) and the lower core mold B (2-1), and the upper core mold B (2-2); and the two ends of the longitudinal support member (4-2) are respectively arranged on two opposite protrusions (1-1g); and the inner sides of the edges of the lower core mold A (1-1), the upper core mold A (1-2) and the lower core mold B (2-1), and the upper core mold B (2-2) are respectively arranged with a plurality of groups of opposite arc grooves (1-1h); and the two ends of the transverse support member (4-1) are respectively arranged in the arc grooves (1-1h).

Images