Internal angle formwork structure with supporting inner formwork and construction method

Abstract

The invention discloses a internal angle formwork structure with a supporting inner formwork and a construction method, and relates to the technical field of building molds. The structure comprises a first side formwork, a second side formwork, a plastic steel formwork, and a supporting inner formwork. The first side formwork and the second side formwork are arranged at a certain angle to each other, and the plastic steel formwork is commonly connected to one end adjacent to the first side formwork and the second side formwork. The supporting inner formwork is supported on the inner side of the plastic steel formwork, and the plastic steel formwork is shaped into a internal angle formwork structure in the form of support. The supporting inner formwork is fixedly connected to the first side formwork and the second side formwork by bolts respectively; the first side formwork, the second side formwork and the plastic steel formwork constitute an integral structure, and the plastic steel formwork is shaped into various forms of internal angle structures by supporting inner forms of different forms; during the casting process, the rigidity of the supporting inner formwork meets the strength requirements of the mold, and when disassembling, the supporting inner formwork is removed, and the flexible plastic steel formwork constitutes a structure that is convenient for disassembly.

Description

Technical Field

[0001] The invention relates to the technical field of building moulds, and in particular to a negative angle mould structure provided with a supporting inner mould and a construction method. Background Art

[0002] In the existing house structure construction process, it is a recognized problem that the formwork at the internal corner is difficult to remove. Since the formwork is tightly connected to the walls on both sides of the internal corner edge, the holding force of the concrete is too large. If the formwork is removed with force during dismantling, it is easy to cause damage to the poured wall and the internal corner.

[0003] In order to solve the above technical problems, the common practice is to split the template at the inner corner into several parts, such as the utility model with application number CN201920236584.0, which discloses an easily removable inner corner template. The utility model splits the template at the inner corner into two L-shaped inner corner templates and a first connecting template. This method of disassembling the template piece by piece can avoid damage to the inner corner and the wall, but it also reduces the overall strength of the mold, and increases the disassembly and assembly of the mold by many steps.

[0004] In summary, how to make the formwork at the internal corner easy to disassemble, how to protect the wall and the internal corner to the greatest extent during the disassembly process, and how to simplify the disassembly of the mold are technical issues that need to be solved. Summary of the invention

[0005] The present invention proposes a internal corner template structure with a supporting inner mold and a construction method, the purpose of which is to solve the technical problems existing in the prior art: how to make the template at the internal corner easy to disassemble, how to protect the wall and the internal corner to the greatest extent during the disassembly process, and how to simplify the disassembly of the mold as much as possible.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A internal angle formwork structure provided with a supporting inner mold comprises a first side formwork, a second side formwork, a plastic steel formwork, and a supporting inner mold. The first side formwork and the second side formwork are arranged at a certain angle to each other, and the plastic steel formwork is commonly connected to one end adjacent to the first side formwork and the second side formwork. The supporting inner mold is supported on the inner side of the plastic steel formwork, and the plastic steel formwork is shaped into a internal angle formwork structure in the form of support. The supporting inner mold is fixedly connected to the first side formwork and the second side formwork by bolts respectively; the first side formwork, the second side formwork and the plastic steel formwork constitute an integral structure, and the plastic steel formwork is shaped into various forms of internal angle structures by the supporting inner molds of different forms; during the casting process, the rigidity of the supporting inner mold meets the strength requirements of the mold, and when disassembling, the supporting inner mold is removed, and the flexible plastic steel formwork constitutes a structure that is easy to disassemble.

[0008] Preferably, the plastic steel formwork is made of low-carbon steel material, the thickness of the first side formwork and the second side formwork is greater than the thickness of the plastic steel formwork, and the outer surfaces of the first side formwork, the second side formwork and the plastic steel formwork together constitute the mold cavity surface at the structural inner corner.

[0009] Preferably, a shaping ridge is provided at the midline of the inner surface of the internal angle template structure, the outer end of the shaping ridge is welded to the inner surface of the plastic steel template, and a guide column is welded to the inner end along the direction of the shaping ridge, and a conical structure is provided on the top of the guide column; the supporting inner mold comprises an inner mold body for extruding the internal angle template structure and connecting plates arranged at both ends of the inner mold body, the connecting plates are fixedly connected to the first side template and the second side template by bolts respectively, and a guide groove is longitudinally provided at one end of the inner mold body facing the guide column of the internal angle template structure, and the guide groove is used in conjunction with the guide column and the shaping ridge.

[0010] Preferably, the first side template and the second side template are arranged perpendicular to each other, and the internal angle template structure is a right-angle internal angle template.

[0011] Preferably, the connection between the first side template, the second side template and the plastic steel template constitutes a limiting slide groove structure, the outer side of the end of the inner mold body cooperates with the limiting slide groove structure, the connecting plate extends in a direction that fits the inner surface of the first side template or the second side template, and a plurality of first bolt holes are evenly distributed on the connecting plate. The first side template, the second side template are provided with threaded blind holes at positions opposite to the first bolt holes, and the connecting plate is fixedly connected to the first side template or the second side template by a first bolt that passes through the first bolt hole and is screwed to the threaded blind hole.

[0012] Preferably, a plurality of telescopic adjustment mechanisms are connected between the inner surfaces of the first side template and the second side template, and the telescopic adjustment mechanisms include a sleeve, a first screw, and a second screw. Both ends of the inner surface of the sleeve are provided with internal threads with opposite rotation directions, and are respectively screwed to the ends of the first screw and the second screw. The other ends of the first screw and the second screw are respectively hinged to the inner surfaces of the first side template and the second side template. The two ends of the telescopic adjustment mechanism are at the same distance from the position of the forming edge. The telescopic adjustment mechanism is perpendicular to the forming edge. By rotating the sleeve, the first screw and the second screw move simultaneously in a direction close to or away from the sleeve.

[0013] Preferably, the first side formwork and the second side formwork are provided with an inclined surface at one end away from the shaping edge, and the inclined surface is inclined toward the side away from the structural wall and the shaping edge.

[0014] Preferably, a limiting block is welded to the inner surface of the first side mold plate or the second side mold plate where the outer end of the connecting plate is located, and a striking block is provided on the end surface of the supporting inner mold away from the shaping edge.

[0015] A construction method for a internal angle formwork comprises the following steps:

[0016] (1) Select a supporting inner mold of a suitable shape according to construction requirements, and insert it into the inner side of the plastic steel template, so that the plastic steel template is formed into a negative angle template structure of a required shape, and the supporting inner mold is fixedly connected to the first side template and the second side template by a first bolt;

[0017] (2) The first side template and the second side template are respectively fixedly connected to other adjacent templates in the mold system to be constructed by second bolts, so that the upper and lower ends of the plastic steel template are sealed with the edges of the other steel templates;

[0018] (3) After the mold system including the inner corner formwork structure with supporting inner mold is built, pouring construction is carried out;

[0019] (4) After the concrete is set, the mold system is removed. During this process, the first bolt is removed, and the supporting inner mold is taken out by knocking the knocking block. Then, the second bolt is removed to separate the first side mold and the second side mold from the other molds. Then, the sleeves of each group of telescopic adjustment mechanisms are rotated so that the first side mold and the second side mold are synchronously flipped inward under the pull of the telescopic adjustment mechanism. During this process, the first side mold and the second side mold are separated from the surface of the concrete structure wall, and the two ends of the plastic steel mold are synchronously separated from the surface of the structure wall until the inner corner mold structure is completely separated from the inner corner of the structure wall.

[0020] The beneficial effects of the internal angle formwork structure and construction method provided with a supporting inner formwork of the present invention are as follows:

[0021] 1. The first side template, the second side template and the plastic steel template of the present invention constitute an integral structure, thereby overcoming the limitation of the prior art (i.e. splitting the internal angle template into small pieces to solve the problem of difficult disassembly); due to the plastic characteristics of the plastic steel template itself, the plastic steel template can be shaped into various forms of internal angle structures by supporting inner molds of different forms (to the extent that the plastic steel template is not damaged), thereby improving the convenience of mold use.

[0022] 2. The present invention quickly shapes the right-angle internal corner formwork structure through the support inner mold. During the pouring process, the support inner mold meets the strength requirements of the mold. When disassembling, the support inner mold is removed, and the flexible structure of the plastic steel formwork is convenient for disassembly (it is easy to tear off from the surface of the structural wall, and the demolding force will not be offset by the rigidity of its own right-angle structure).

[0023] 3. When removing the formwork, the present invention rotates the sleeve, and the first screw and the second screw move to one side of the sleeve at the same time, thereby tearing the first side template and the second side template at the same time, and then the first side template and the second side template are further driven to tear the two ends of the plastic steel template. Due to the principle of leverage, the process of tearing off the plastic steel template is quick and labor-saving. At the same time, since the two ends of the telescopic adjustment mechanism are at the same distance from the shaping edge, the tearing off of the two ends of the plastic steel template is synchronous, that is, the two ends of the plastic steel template fall off from the surface of the structural wall synchronously.

[0024] In summary, the present invention facilitates the disassembly of the internal corner formwork. During the disassembly process, the plastic steel formwork gradually separates from the surface of the structural wall, so the wall surface and the internal corner can be protected from damage to the greatest extent. The present invention does not need to divide the formwork into several small pieces, thereby ensuring the strength of the mold and also making the disassembly and assembly of the mold easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 : A schematic diagram of the structure of the present invention;

[0026] Figure 2 : Schematic diagram of the present invention when building a mold.

[0027] Figure 3 : Schematic diagram of the demoulding process of the present invention;

[0028] Figure 4 : A three-dimensional structural diagram of the plastic steel template of the present invention when constituting a right-angle internal angle template structure;

[0029] Figure 5 , a structural diagram of the supporting inner mold according to an embodiment of the present invention;

[0030] 1. First side formwork; 2. Second side formwork; 3. Other formworks; 4. Plastic steel formwork; 5. Support inner formwork; 5-1. Connecting plate; 5-2. Inner formwork body; 5-3. Guide groove; 6. Sleeve; 7. First screw; 8. Second screw; 9. First bolt; 10. Limit block; 11. Shaping edge; 12. Guide column; 12-1. Conical structure; 13. Inclined surface; 14. Boss; 15. Connecting block; 16. Second bolt; 17. Structural wall; 18. Striking block; 19. First bolt hole. DETAILED DESCRIPTION

[0031] The following describes in detail the implementation mode of the present invention in a step-by-step manner. The description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0033] Embodiment 1:

[0034] A negative angle template structure provided with a supporting inner mold, such as Figure 1-5 As shown, it includes a first side formwork 1, a second side formwork 2, a plastic steel formwork 4, and a supporting inner formwork 5. The first side formwork 1 and the second side formwork 2 are arranged at a certain angle to each other, and the plastic steel formwork 4 is commonly connected at one end adjacent to the first side formwork 1 and the second side formwork 2. The supporting inner formwork 5 is supported on the inner side of the plastic steel formwork 4, and the plastic steel formwork 4 is shaped into a negative angle formwork structure in the form of support. The supporting inner formwork 5 is fixedly connected to the first side formwork 1 and the second side formwork 2 by bolts respectively.

[0035] In this embodiment, the first side template, the second side template and the plastic steel template constitute an integral structure, thereby overcoming the limitations of the prior art (i.e., splitting the internal angle template into small pieces to solve the problem of difficult disassembly); due to the plastic characteristics of the plastic steel template itself, the plastic steel template can be shaped into various forms of internal angle structures by supporting inner molds of different forms (to the extent that the plastic steel template is not damaged), thereby improving the convenience of mold use.

[0036] Embodiment 2:

[0037] Based on Example 1, this example further discloses:

[0038] like Figure 1-5 As shown, the plastic steel formwork 4 is made of low-carbon steel material, the thickness of the first side formwork 1 and the second side formwork 2 is greater than the thickness of the plastic steel formwork 4, and the outer surfaces of the first side formwork 1, the second side formwork 2 and the plastic steel formwork 4 together constitute the mold cavity surface at the structural inner corner.

[0039] A shaping ridge 11 is provided at the midline of the inner surface of the internal angle template structure, the outer end of the shaping ridge 11 is welded to the inner surface of the plastic steel template 4, and a guide column 12 is welded to the inner end along the direction of the shaping ridge 11, and a conical structure 12-1 is provided at the top of the guide column 12; the supporting inner mold includes an inner mold body 5-2 for extruding the internal angle template structure and connecting plates 5-1 arranged at both ends of the inner mold body 5-2, and the connecting plates are fixedly connected to the first side template 1 and the second side template 2 by bolts respectively, and a guide groove 5-3 is longitudinally provided at one end of the inner mold body 5-2 facing the guide column, and the guide groove 5-3 is used in conjunction with the guide column 12 and the shaping ridge 11. The function of the shaping rib 11 is to assist the plastic steel template 4 in shaping into a right-angle internal angle template structure or other forms of internal angle template structure (and it cannot be understood that the plastic steel template automatically becomes a right-angle internal angle template structure or other forms of internal angle template structure after the shaping rib is set), and the function of the guide column is to quickly shape the plastic steel template when the supporting inner mold is inserted along the guide column. The tapered structure plays a role in guiding the guide column to connect with the supporting inner mold.

[0040] In this embodiment, the right-angle internal corner formwork structure is quickly shaped by the supporting inner formwork. During the pouring process, the supporting inner formwork meets the strength requirements of the mold. When disassembling, the supporting inner formwork is removed, and the flexible structure of the plastic steel formwork is convenient for disassembly (it is easy to tear off from the surface of the structural wall without the rigidity of its own right-angle structure offsetting the demolding force).

[0041] Embodiment 3:

[0042] Based on Example 2, this example further discloses:

[0043] like Figure 1-5 As shown, the first side template 1 and the second side template 2 are arranged perpendicular to each other, and the internal angle template structure is a right-angle internal angle template.

[0044] like Figure 1-5 As shown, the connection between the first side template 1, the second side template 2 and the plastic steel template 4 constitutes a limiting slide groove structure (not marked in the figure), the outer side of the end of the inner mold body 5-2 cooperates with the limiting slide groove structure, and the connecting plate extends in the direction of fitting the inner surface of the first side template or the second side template. A plurality of first bolt holes 19 are evenly distributed on the connecting plate 5-1, and the first side template 1, the second side template 2 are provided with threaded blind holes (not drawn in the figure) at positions opposite to the first bolt holes 19. The connecting plate 5-1 is fixedly connected to the first side template 1 or the second side template 2 by a first bolt 9 that passes through the first bolt hole 19 and is screwed to the threaded blind hole.

[0045] like Figure 1-5As shown, a limiting block 10 is welded on the inner surface of the first side mold plate 1 or the second side mold plate 2 where the outer end of the connecting plate 5-1 is located, and a striking block 18 is provided on the end surface of the supporting inner mold 5 away from the shaping edge.

[0046] In this embodiment, the limiting slide groove plays a role of limiting and guiding, and also plays a role of supporting the inner mold, so that the inner mold can shape the plastic steel template, and the limiting block further limits the position of the inner mold to ensure stability during the pouring process. The knocking block is used to disassemble or install the inner mold, and the inner mold can be inserted into place or removed by knocking the knocking block.

[0047] Embodiment 4:

[0048] Based on Example 3, this example further discloses:

[0049] like Figure 1-5 As shown, a plurality of telescopic adjustment mechanisms are connected between the inner surfaces of the first side template 1 and the second side template 2. The telescopic adjustment mechanisms include a sleeve 6, a first screw rod 7, and a second screw rod 8. Both ends of the inner surface of the sleeve 6 are provided with internal threads with opposite rotation directions, and are respectively screwed to the ends of the first screw rod 7 and the second screw rod 8. The other ends of the first screw rod 7 and the second screw rod 8 are respectively hinged to the inner surfaces of the first side template 1 and the second side template 2. The two ends of the telescopic adjustment mechanism are at the same distance from the position of the shaping edge. The telescopic adjustment mechanism is perpendicular to the shaping edge. By rotating the sleeve 6, the first screw rod 7 and the second screw rod 8 move simultaneously in the direction of approaching or moving away from the sleeve 6.

[0050] like Figure 1-3 As shown, the first side formwork 1 and the second side formwork 2 are provided with an inclined surface 13 at one end away from the shaping edge, and the inclined surface is inclined toward the side away from the structural wall 17 and the shaping edge.

[0051] In this embodiment, when removing the mold, by rotating the sleeve, the first screw and the second screw move to one side of the sleeve at the same time, and then tear the first side template and the second side template at the same time, and then the first side template and the second side template are further driven to tear the two ends of the plastic steel template. Due to the principle of leverage, the process of tearing off the plastic steel template is quick and labor-saving. At the same time, since the two ends of the telescopic adjustment mechanism are at the same distance from the shaping edge, the tearing off of the two ends of the plastic steel template is synchronous, that is, the two ends of the plastic steel template fall off from the surface of the structural wall synchronously.

[0052] Embodiment 5:

[0053] Based on Example 4, this example further discloses:

[0054] A construction method for a negative angle formwork, such as Figure 1-5As shown, the following steps are included:

[0055] (1) Select a supporting inner mold of a suitable shape according to construction requirements, and insert it into the inner side of the plastic steel template, so that the plastic steel template is formed into a negative angle template structure of a required shape, and the supporting inner mold is fixedly connected to the first side template and the second side template by a first bolt;

[0056] (2) The first side formwork and the second side formwork are respectively fixedly connected to other adjacent formworks in the mold system to be constructed by second bolts, so that the upper and lower ends of the plastic steel formwork and the edges of the other steel formworks are sealed, such as by pasting a sealing strip or setting a rubber pad at the contact part;

[0057] (3) After the mold system including the inner corner formwork structure with supporting inner mold is built, pouring construction is carried out;

[0058] (4) After the concrete is set, the mold system is removed. During this process, the first bolt is removed, and the supporting inner mold is taken out by knocking the knocking block. Then, the second bolt is removed to separate the first side mold and the second side mold from the other molds. Then, the sleeves of each group of telescopic adjustment mechanisms are rotated so that the first side mold and the second side mold are synchronously flipped inward under the pull of the telescopic adjustment mechanism. During this process, the first side mold and the second side mold are separated from the surface of the concrete structure wall, and the two ends of the plastic steel mold are synchronously separated from the surface of the structure wall until the inner corner mold structure is completely separated from the inner corner of the structure wall.

[0059] The use principle of the present invention:

[0060] The attached drawings of the present invention only illustrate a type of internal corner formwork structure and construction method with a supporting inner mold suitable for right-angled internal corners. In actual use, the plastic steel formwork can also be shaped by changing the shape of the supporting inner mold to form various forms of internal corner formwork structures. For example, vase piers in modern building structures are often provided with internal corner structures with inner chamfers. By using the supporting inner mold designed by the present invention and adapted to the inner chamfer, the plastic steel formwork can be provided with the internal corner structure with the inner chamfer, thereby enabling the internal chamfer structure of the vase pier with a beautiful appearance to be cast and formed.

[0061] In use, the present invention needs to be integrated into the existing template system. Taking the casting of the vase pier as an example, the first side template and the second side template can be connected to the other templates 3 of the vase pier respectively through the second bolt 16. As for the connection method, it is a common technology and will not be described in detail. It should be noted that before connecting other templates, the supporting inner mold needs to be inserted into the specified position, that is, the bottom port of the guide groove on the supporting inner mold is aligned with the conical structure 12-1 at the top of the guide column 12 and the top of the shaping edge, and then the supporting inner mold is gradually inserted, and the plastic steel template is shaped into a predetermined structure through the limiting of the limiting slide groove, and then the first bolt is connected.

[0062] After casting, Figure 1 , 2 As shown, the second bolt 16 is removed, the supporting inner mold is taken out by hammering the striking block 18, and then the telescopic adjustment mechanisms are rotated in sequence to make the first side mold and the second side mold tilt up at the same time, and drive the two ends of the plastic steel mold to tilt up at the same time, and finally remove the plastic steel mold from the structural wall. Due to the existence of the shaping edge, the two ends of the plastic steel mold are folded synchronously along the shaping edge, avoiding irregular changes, which is conducive to continued use next time.

Claims

1. A negative angle template structure provided with a supporting inner mold, characterized by: It comprises a first side formwork, a second side formwork, a plastic steel formwork, and a supporting inner formwork, wherein the first side formwork and the second side formwork are arranged at a certain angle to each other, and the plastic steel formwork is commonly connected to one end adjacent to the first side formwork and the second side formwork; the supporting inner formwork is supported on the inner side of the plastic steel formwork, and the plastic steel formwork is shaped into a negative angle formwork structure in the form of support, and the supporting inner formwork is fixedly connected to the first side formwork and the second side formwork by bolts respectively; the first side formwork, the second side formwork and the plastic steel formwork constitute an integral structure, and the plastic steel formwork is shaped into various negative angle structures by the supporting inner formworks of different forms; during the casting process, the rigidity of the supporting inner formwork meets the strength requirements of the mold, and when disassembling, the supporting inner formwork is removed, and the flexible plastic steel formwork constitutes a structure that is convenient for disassembly; The plastic steel template is made of low-carbon steel material, the thickness of the first side template and the second side template is greater than the thickness of the plastic steel template, and the outer surfaces of the first side template, the second side template and the plastic steel template together constitute the mold cavity surface at the internal angle of the structure; A shaping ridge is provided at the midline of the inner surface of the internal angle template structure, the outer end of the shaping ridge is welded to the inner surface of the plastic steel template, and a guide column is welded to the inner end along the direction of the shaping ridge, and a conical structure is provided at the top of the guide column; the supporting inner mold comprises an inner mold body for extruding the internal angle template structure and connecting plates provided at both ends of the inner mold body, the connecting plates are fixedly connected to the first side template and the second side template by bolts respectively, and a guide groove is provided in the longitudinal direction at one end of the inner mold body facing the guide column direction of the internal angle template structure, and the guide groove is used in conjunction with the guide column and the shaping ridge; The first side template and the second side template are arranged perpendicular to each other, and the internal angle template structure is a right-angle internal angle template; A limiting block is welded on the inner surface of the first side mold plate or the second side mold plate where the outer end of the connecting plate is located, and a knocking block is arranged on the end surface of the supporting inner mold away from the shaping edge.

2. A negative angle formwork structure with a supporting inner formwork as claimed in claim 1, characterized in that: The connection between the first side template, the second side template and the plastic steel template constitutes a limiting slide groove structure, the outer side of the end of the inner mold body cooperates with the limiting slide groove structure, the connecting plate extends in the direction of fitting to the inner surface of the first side template or the second side template, and a plurality of first bolt holes are evenly distributed on the connecting plate. The first side template, the second side template are provided with threaded blind holes at positions opposite to the first bolt holes, and the connecting plate is fixedly connected to the first side template or the second side template by a first bolt that passes through the first bolt hole and is screwed to the threaded blind hole.

3. A negative angle formwork structure with a supporting inner formwork as claimed in claim 2, characterized in that: A plurality of telescopic adjustment mechanisms are connected between the inner surfaces of the first side template and the second side template, and the telescopic adjustment mechanisms include a sleeve, a first screw and a second screw. Both ends of the inner surface of the sleeve are provided with internal threads with opposite rotation directions, and are respectively screwed to the ends of the first screw and the second screw. The other ends of the first screw and the second screw are respectively hinged to the inner surfaces of the first side template and the second side template. The distances between the two ends of the telescopic adjustment mechanism and the positions of the shaping edges are the same, and the telescopic adjustment mechanism and the shaping edges are perpendicular to each other. By rotating the sleeve, the first screw and the second screw move simultaneously in a direction close to or away from the sleeve.

4. A negative angle formwork structure with a supporting inner formwork as claimed in claim 3, characterized in that: The first side template and the second side template are provided with an inclined surface at one end away from the shaping edge, and the inclined surface is inclined toward the side away from the structural wall and the shaping edge.

5. A construction method for a recessed corner formwork, characterized by: The method of using a negative angle template structure provided with a supporting inner mold as claimed in claim 4 comprises the following steps: (1) Select a supporting inner mold of a suitable shape according to construction requirements, and insert it into the inner side of the plastic steel template, so that the plastic steel template is formed into a negative angle template structure of a required shape, and the supporting inner mold is fixedly connected to the first side template and the second side template by a first bolt; (2) The first side template and the second side template are respectively fixedly connected to other adjacent templates in the mold system to be constructed by second bolts, so that the upper and lower ends of the plastic steel template are sealed with the edges of the other steel templates; (3) After the mold system including the inner corner formwork structure with supporting inner mold is built, pouring construction is carried out; (4) After the concrete is set, the mold system is removed. During this process, the first bolt is removed, and the supporting inner mold is taken out by knocking the knocking block. Then, the second bolt is removed to separate the first side mold and the second side mold from the other molds. Then, the sleeves of each group of telescopic adjustment mechanisms are rotated so that the first side mold and the second side mold are synchronously flipped inward under the pull of the telescopic adjustment mechanism. During this process, the first side mold and the second side mold are separated from the surface of the concrete structure wall, and the two ends of the plastic steel mold are synchronously separated from the surface of the structure wall until the inner corner mold structure is completely separated from the inner corner of the structure wall.

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