Back ridge and back ridge manufacturing method

Abstract

The invention discloses a back ridge and a back ridge manufacturing method, and relates to the technical field of civil construction tools. The back ridge is composed of a ridge body and an isolation cap which is made of a hydrophobic concrete polymer material and is in the shape of a shell, and the upper surface of the isolation cap is an embedding surface embedded with a template. The method mainly comprises the following steps: extruding a ridge blank, processing a ridge body, carrying out injection molding or extrusion molding on the isolation cap, and assembling and fixing the ridge blank and the ridge body. The method has the advantages of quick back ridge cleaning and short construction turnover time.

Description

Technical Field

[0001] The invention relates to an auxiliary tool used in the construction process of a civil engineering project, in particular to a back rib supporting a template for pouring construction of a concrete building and a method for manufacturing the back rib. Background Art

[0002] The invention patent named "Formwork, Back-beam and Formwork Assembly" and the announcement number CN102733594B discloses a formwork for concrete building pouring construction and a back rib supporting the formwork, also called a back rib. The assembly formed by the formwork and the back rib has a significant feature: the length and width of the formwork are both integer multiples of a specific modulus, and a plurality of ribs with rectangular cross sections are arranged on the back, all ribs have exactly the same cross section, and the distance between the center lines of every two ribs is an integer multiple of the modulus; the back rib has a fitting surface, and the fitting surface is provided with longitudinal grooves and transverse grooves that are parallel to each other and have rectangular cross sections for matching with the ribs on the formwork, the distance between the center lines of two adjacent transverse grooves is an integer multiple of the modulus, and the distance between the center lines of the two longitudinal grooves is the modulus. The above characteristics enable the main back rib to be supported on the butt joint of two formworks, and can also be supported between the two ends of the formwork as a secondary back rib, and also has the advantage of supporting the formwork longitudinally or transversely, and when supporting, the ribs on the formwork are fitted with the longitudinal grooves or transverse grooves on the back rib fitting surface.

[0003] Generally speaking, the front side of the formwork is in direct contact with the concrete slurry, while the back ribs supported on the back side of the formwork, such as the back ribs in the prior art invention patent CN102733594B, are theoretically not in contact with the concrete slurry. No attention has been paid to the problems caused by the back ribs contacting the concrete. However, it is found in actual construction that when the back ribs are used to support the butt joints of the formwork, since the butt joints cannot be completely sealed, the concrete slurry with better flowability will seep from the butt joints to the mating surface of the back ribs. Even when the back ribs are used to support between the two ends of the formwork, concrete slurry will inevitably drip onto the mating surface of the back ribs at the construction site. This results in the concrete solidified on the mating surface requiring a lot of manpower and material resources to be removed, and also prolongs the recycling cycle of the back ribs, affecting the construction progress.

[0004] The above-mentioned problems generated in the implementation process of the prior art back rib need to be overcome and its structure needs to be improved. Summary of the invention

[0005] The main purpose of the present invention is to provide a back rib that improves the back rib in the invention patent CN102733594B;

[0006] Another object of the present invention is to provide a method for manufacturing a back rib.

[0007] In order to achieve the above-mentioned main purpose, the back rib provided by the present invention includes an engaging surface, the engaging surface has a plurality of transverse grooves and at least one longitudinal groove for cooperating with the template ribs, the transverse grooves and the longitudinal grooves have exactly the same rectangular cross-section; the back rib includes a rib body and an isolation cap buckled on the rib body; the isolation cap is a thin-walled multi-cavity shell made of a concrete-phobic polymer material, the engaging surface is the outer surface of the isolation cap, the inner surface of the isolation cap is composed of four side surfaces of a plurality of cavities, a top surface connecting the four side surfaces and a connecting surface of the bottom of the adjacent cavity; the rib body has a supporting surface in contact with the connecting surface in the area buckled by the isolation cap, and a supporting body is also provided in the area extending upward from the supporting surface to the top surface and located in the cavity.

[0008] It can be seen from the above scheme that, based on the prior art, the present invention has made the following improvements to the structure of the back rib, forming a mating surface on the outer surface of a thin-walled shell made of a concrete-phobic polymer material, so that the concrete slurry that leaks or inappropriately penetrates into the back rib is blocked by the isolation cap and will only reach the mating surface but not the rib body. After the concrete is solidified on the mating surface, it can be easily removed. Usually, after being removed from the construction site, the concrete solidified on the mating surface can be removed by tapping it a few times, and it can be quickly put into use in the next cycle, saving time and effort.

[0009] A further solution is that there is at least one support body in one cavity, and when there is only one support body in one cavity, the outer contour of the support body matches the cavity. The advantage of the solution of one support body in one cavity is that the corrugated body has the best supporting effect on the isolation cap, that is, the isolation cap located on the corrugated body is completely supported. On the premise that the strength of the corrugated body meets the design requirements, the main advantage of arranging multiple support bodies in one cavity is that the material of the corrugated body and / or isolation cap can be relatively saved.

[0010] Another further solution is that all the supporting bodies in the area are tubular bodies or solid bodies with openings at both ends, or a combination of tubular bodies and solid bodies. The advantages of this solution are that the tubular body saves materials relatively, and the solid body has relatively high strength, that is, the fixation of the template end is more secure, and when the isolation cap and the corrugated body are fixed by screws, the solid body is thicker as the foundation of the screws.

[0011] A further solution is that the isolation cap is fixedly connected to the corrugated body by screws. The advantage of this solution is that the isolation cap is easy to disassemble and assemble when it needs to be replaced.

[0012] To achieve another object of the present invention, the back rib manufacturing method provided by the present invention comprises the following steps:

[0013] The corrugated body forming step is to cast the corrugated body, or to extrude the corrugated blank and then process the corrugated body;

[0014] The isolation cap forming step is to form the isolation cap by injection molding or compression molding.

[0015] A further solution is to include

[0016] Assembling step: After the isolation cap forming step, the isolation cap is buckled onto the corrugated body.

[0017] A further solution is to use the supporting surface and the supporting body of the corrugated body as a part of the injection mold during the injection molding process.

[0018] A further solution is to also include

[0019] Assembling step: After the isolation cap forming step, the isolation cap is buckled onto the corrugated body.

[0020] A further solution is to further include a fixing step: after the assembling step, the isolation cap is fixed to the corrugated body from the outside with screws.

[0021] Another further solution is to also include

[0022] Assembling step: the isolation cap is buckled onto the corrugated body at a low temperature under a high temperature state, and the isolation cap and the corrugated body are fixedly connected to each other by thermal expansion and contraction assembly.

[0023] A further solution is that the back rib is made of aluminum alloy, and after the rib blank is extruded, the rib blank is milled or laser cut to form the support body. The advantage of this solution is that the manufacturing cost of the back rib is much lower than the casting cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural exploded view of a back edge embodiment of the present invention;

[0025] Figure 2 It is a three-dimensional diagram of a back edge embodiment of the present invention;

[0026] Figure 3 yes Figure 2 A longitudinal section view of the middle back rib along any one of the two longitudinal ribs located in the middle;

[0027] Figure 4 yes Figure 3 A partial enlarged view in FIG.

[0028] Figure 5 yes Figure 3 A partial enlarged view of B in FIG.

[0029] Figure 6 yes Figure 2 A cross-sectional view of the middle back rib at the longitudinal rib;

[0030] Figure 7 It is a three-dimensional picture of the blank obtained after extrusion molding;

[0031] Figure 8 yes Figure 7 Cross-sectional view of

[0032] Fig. 9 It is a three-dimensional picture of the fluted body after the fluted blank is cut to form transverse grooves;

[0033] Fig.10 It is a front view of the isolation cap of the present invention;

[0034] Fig.11 yes Fig.10 Middle C-C section view;

[0035] Fig.12 yes Fig.10 Middle D-D section view;

[0036] Fig.13 It is a structural schematic diagram of another back edge embodiment of the present invention;

[0037] Fig.14 It is a structural schematic diagram of another back rib embodiment of the present invention.

[0038] The following is a detailed description in conjunction with the embodiments of the present invention and the accompanying drawings. DETAILED DESCRIPTION

[0039] Back edge embodiment

[0040] See also Figure 1 and Figure 2 The back rib 10 of the present invention comprises a rib body 1 and an isolation cap 2 buckled on the rib body 1. Considering that the back rib 10 is roughly in the shape of an elongated body and the injection molding cost of the isolation cap 2 in this example, in order to relatively reduce the mold cost, the isolation cap 2 in this example has three sections, that is, three isolation caps 2 are connected in sequence in the length direction. The isolation cap 2 is made of PP plastic and has a thin-walled multi-cavity shell structure. After being buckled with the rib body 1, the outer surface of the thin-walled multi-cavity shell is the mating surface of the back rib, and the mating surface has a plurality of transverse grooves 21 and longitudinal grooves 22. All the transverse grooves 21 and all the longitudinal grooves 22 have exactly the same rectangular cross-section. It should be emphasized that there are three longitudinal grooves 22 in this example, each of which can be used to cooperate with the template ribs, that is, when the back rib is used as the main back rib in this example, the two longitudinal grooves 22 on both sides cooperate with the template ribs, and when it is used as the auxiliary back rib, only the middle longitudinal groove 22 cooperates with the template ribs. Obviously, if the back rib is not used as the auxiliary back rib, the middle longitudinal groove 22 can be wide or narrow, or cancelled.

[0041] See also Figure 1The corrugated body 1 is provided with a plurality of support bodies in the area where the isolation cap 2 is buckled. In the length direction, the two middle ones are tubular support bodies 12 with openings at both ends, and the two sides are solid support bodies 11. Both the support bodies 11 and the support bodies 12 extend upward from the support surface 13.

[0042] See also Figure 2 , the isolation cap 2 is fastened to the outside of the support body 11 by the fastening screws 3, and each isolation cap 2 is fixedly connected to the corrugated body 1. Obviously, when there is sufficient bonding force between the isolation cap 2 and the corrugated body 1, the screws 3 are not necessarily used. In addition, the number of screws 3 used and the specific fastening positions can be determined according to factors such as the length of the isolation cap 2 and the shell thickness of the thin-walled shell, so that the back corrugation 10 can be fixed without the isolation cap 2 being inappropriately separated from the corrugated body 1 during transportation and construction.

[0043] See also Figure 3 , Figure 4 and Figure 5 The thin-walled multi-cavity shell-shaped isolation cap 2 is made of a concrete-repellent polymer material, and its inner surface is composed of four side surfaces 23 of each cavity, a top surface 24 connecting the four side surfaces, and a connecting surface 25 at the bottom of adjacent cavities.

[0044] Replay Figure 1 The area where the corrugated body 1 is buckled by the isolation cap has a support surface 13 that is in contact with the connection surface 25. The entire support surface 13 on the corrugated body 1 is the bottom surface that is located at the top of the corrugated body 1 and presents a vertical and horizontal groove. The support body 11 and the support body 12 both extend upward from the support surface 13 to the top surface 24 of the isolation cap 2 cavity. Therefore, the connection surface 25 of the isolation cap 2 is supported by the support surface 13, and the top surface 24 of the isolation cap 2 is supported by the top surfaces of the support bodies 11 and 12. In this example, the top surfaces 24 of all cavities are fully supported one-to-one by the support bodies.

[0045] See also Figure 6 The outer surface of the isolation cap 2 is Figure 6 The upper surface shown is the fitting surface, the inner surface of the isolation cap 2 is composed of the four side surfaces 23 of each cavity, the top surface 24 and the connecting surface 25 of the lower part of the adjacent cavity, the supporting surface 13 of the corrugated body 1 is in contact with the connecting surface 25, and the supporting bodies 11 and 12 extend upward from the supporting surface 13 to the top surface 24 and are located in the cavity. In this example, since the solid supporting bodies 11 are located on both sides, the screws 3 can fix the isolation cap 2 and the corrugated body 1 more securely.

[0046] See also Figure 1 , combined with Figure 3 and Figure 6In this example, only one support body is provided in a cavity of the isolation cap 2. Therefore, the solid support body 11 is completely consistent with its corresponding cavity, while the tubular support body 12 is not completely consistent with the corresponding side surface 21 of the cavity due to the existence of the opening, but the outer contour of the tubular support body 12 is consistent with the cavity in which it is located.

[0047] Back rib manufacturing method embodiment

[0048] The manufacturing method of the back corrugation is as follows: firstly, the corrugation body 1 and the isolation cap 2 are formed, and then the two are assembled.

[0049] Corrugated body forming steps: see Figure 7 and Figure 8 In the extrusion molding machine, the aluminum alloy corrugated blank is extruded and cut into lengths according to the construction requirements. Two longitudinal hollow ribs 12A and two longitudinal solid ribs 11A are extruded on the supporting surface of the corrugated blank. Figure 7 The hollow ribs 12A and the solid ribs 11A on the blank are cut transversely to obtain the corrugated body 1 of this example. Fig. 9 It can be understood that in this example, the longitudinal and transverse grooves formed between the support bodies 12 and 11 on the support surface 13 also have exactly the same cross-sectional shape, but the width of the grooves should be smaller than the corresponding longitudinal grooves 22 and transverse grooves 21 on the isolation cap 2 by 2 times the thickness of the isolation cap 2 shell.

[0050] Isolation cap molding steps: see Fig.10 , Fig.11 and Fig.12 , an isolation cap 2 made of PP material is injection molded in an injection mold consisting of an upper and lower mold, Fig.10 It is the main view of the isolation cap 2 and also the main view of the fitting surface. There are multiple transverse grooves 21 and three longitudinal grooves 22 on the fitting surface. All transverse grooves 21 are used to cooperate with the ribs on the back of the template. When used as the main back rib supporting template, only the longitudinal grooves 22 on two sides are used to cooperate with the ribs on the back of the template. When used as the secondary back rib supporting template, only the middle longitudinal groove 22 is used to cooperate with the ribs on the back of the template.

[0051] Assembly steps: Put the three tops Fig.10 The isolation caps 2 shown are buckled one after another. Fig. 9 On a corrugated body 1 shown.

[0052] Fixing steps: Use screws 3 to fix the isolation cap 2 from the outside of the solid rib 11. Four screws 3 are used for each isolation cap 2. After the fixation is completed, the back rib 10 of this example is formed. Figure 2 Show.

[0053] Other embodiments of the back rib manufacturing method

[0054] In the corrugated body forming step, the processing of cutting out the support body can also be completed by other processing means such as laser cutting. The corrugated body can also be cast, which has the advantage of omitting the processing step of cutting and forming the support body.

[0055] In the isolation cap molding step, the corrugated body 1 can be molded first, and the isolation cap 2 can be injected using the corrugated body 1 as the upper mold. As long as there are hollow ribs 12 on the supporting surface of the corrugated body 1, the molten plastic will inevitably flow into the cavity of the hollow ribs 12. After the lower mold is demolded, the corrugated body 1 as the upper mold is naturally fixed to the isolation cap 2 and cannot be separated. Therefore, in such an isolation cap molding method, the assembly step and the fixing step can be omitted.

[0056] In the molding step of the isolation cap, a compression molding technology can also be used, using a flat plate material made of a concrete-repellent polymer material, which is heated and softened and then placed between an upper and lower mold for extrusion or stamping.

[0057] In the assembly step, the isolation cap 2 can be put on the corrugated body 1 at a low temperature when it is at a high temperature after molding. After cooling to room temperature, a back corrugation 10 with sufficient bonding force between the isolation cap 2 and the corrugated body 1 can also be obtained.

[0058] Other embodiments of back ribs

[0059] See also Figure 6 The corrugated body 1 is an extension body with a cross section of approximately "Π" shape. Obviously, it can also be an extension body with a cross section of a rectangular frame or other cross-sectional shape frame; according to the prior art CN102733594B, it can be known that the longitudinal grooves 22 used to cooperate with the template are longitudinal grooves 22 located on both sides. Therefore, the two hollow support bodies 12 can be combined into a wider support body 12, or narrowed outward to be two narrower solid support bodies 11, so as to balance the reasonable configuration between material saving and longitudinal bending strength, and the shape of the isolation cap 2 thereon can be adaptively modified. Obviously, the changes in these implementations can also achieve the design purpose of the back corrugated body 10 of the present invention.

[0060] In addition, the corrugated body 1 can also be processed from wooden materials, or cast from aluminum alloy materials; the isolation cap can also be made of other concrete-repellent polymer materials, such as PE, PTFE, which can also achieve the purpose of the present invention.

[0061] See also Fig.13 , Fig.132 is a three-dimensional structural diagram of another back rib 10 according to the present invention, wherein a spacer cap 2 is omitted, and the back rib 10 is used exclusively as a secondary back rib. Different from the aforementioned back rib 10 embodiment, only a tubular support body 12 is provided in the buckled area of ​​the rib body 1, but no solid support body 11, two support bodies 12 are provided in each cavity of the spacer cap 2, and only one longitudinal groove 22 for cooperating with the template rib is provided on the fitting surface.

[0062] See also Fig.14 , Fig.14 2 is a three-dimensional structural diagram of another back rib 10 according to the present invention, wherein a spacer cap 2 is omitted, and the back rib 10 is used exclusively as a main back rib. Different from the aforementioned back rib embodiment, only a solid support body 11 is provided in the area where the rib body 1 is buckled, but no tubular support body 12 is provided, the spacer cap 2 has two cavities of different sizes, the small cavity has two support bodies 11, and the large cavity has six support bodies 11, and two longitudinal grooves 22 for matching with the template ribs are provided on the fitting surface.

Claims

1. A back rib, comprising a fitting surface, the fitting surface having a plurality of transverse grooves and at least one longitudinal groove for cooperating with the template ribs, the transverse grooves and the longitudinal grooves having exactly the same rectangular cross-section; Features: The back corrugation includes a corrugation body and an isolation cap buckled on the corrugation body; The isolation cap is a thin-walled multi-cavity shell made of concrete-repellent polymer material, the fitting surface is the outer surface of the isolation cap, and the inner surface of the isolation cap is composed of four side surfaces of multiple cavities, a top surface connecting the four side surfaces and a connecting surface of the bottom of the adjacent cavity; The corrugated body has a supporting surface in contact with the connecting surface in the area fastened by the isolation cap, and a supporting body extending upward from the supporting surface to the top surface and located in the cavity is also provided in the area.

2. The back rib according to claim 1, characterized in that: There is at least one support body in one cavity. When there is only one support body in one cavity, the outer contour of the support body matches the cavity.

3. The back rib according to claim 1, characterized in that: The support body in the region is a tubular support body with openings at both ends, or a solid support body, or a combination of a tubular support body and a solid support body.

4. The back rib according to claim 1, characterized in that: The isolation cap is fixedly connected to the corrugated body by screws.

5. The method for manufacturing the back fringes of any one of claims 1 to 4, characterized in that: The following steps are included The corrugated body forming step is to cast the corrugated body, or to extrude the corrugated blank and then process the corrugated body; Isolation cap molding step: molding the isolation cap by injection molding or compression molding.

6. The back rib manufacturing method according to claim 5, characterized in that: Also includes During the injection molding process, the supporting surface and the supporting body of the corrugated body are used as a part of the injection mold.

7. The back rib manufacturing method according to claim 5, characterized in that: Also includes Assembling step: After the isolation cap forming step, the isolation cap is buckled onto the corrugated body.

8. The back rib manufacturing method according to claim 7, characterized in that: Also includes Fixing step: After the assembling step, the isolation cap is fixed to the corrugated body from the outside with screws.

9. The back rib manufacturing method according to claim 5, characterized in that: Also includes Assembling step: the isolation cap is buckled onto the corrugated body at a low temperature under a high temperature state, and the isolation cap and the corrugated body are fixedly connected to each other by thermal expansion and contraction assembly.

10. The back rib manufacturing method according to any one of claims 5 to 9, characterized in that: The back corrugation is made of aluminum alloy. After the corrugated blank is formed by extrusion, the corrugated blank is milled or laser cut to form the support body.

Images