Splicing cement mortar test piece mold provided with demolding device

Abstract

The utility model discloses a splicable cement mortar test piece mold provided with a demolding device. The splicable cement mortar test piece mold comprises a mold and the demolding device, the mold is a rectangular frame containing cavity which is formed by splicing a foundation bottom plate, a splicing bottom plate, foundation side plates, splicing side plates, side plates and T-shaped transverse partition plates, and the number of the rectangular frame containing cavities can be adjusted. The demolding device is located in a middle cavity of the remaining end of a mold side plate and comprises a base, a force generation cavity, an oil cavity, a pressurization beam cavity and the like, a pointed-end lifting column is arranged in the force generation cavity, two cylindrical horizontal supporting columns are symmetrically arranged on the upper side of the force generation cavity, and the bottom of the force generation cavity is connected with the pressurization beam cavity and the oil cavity through oil passing through pipes. The pressure lever is controlled to adjust the air pressure in each beam cavity, so that the hydraulic oil is pressed to enter the bottom of the pointed lifting column of the force generation cavity through the oil passing through pipe, and liquid pressure is applied to slowly rise, thereby pushing the horizontal supporting column to transversely move to extrude the side plate, so that the side plate is separated from the test piece, and demolding is completed. The problems that an existing cement mortar test piece is difficult to demould, the number is fixed, manpower is consumed, and efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of civil engineering testing equipment, specifically to a modular cement mortar specimen mold equipped with a demolding device. Background Technology

[0002] In scientific research in the field of civil engineering, it is often necessary to study the various properties of engineering materials to provide a solid foundation for their optimized application in engineering practice. Cement mortar, as a high-performance material, plays a crucial role in civil engineering materials experiments. It is not only a key test object for evaluating the strength, durability, and construction performance of materials, but also an indispensable experimental basis for researching new building materials, optimizing mix design, and exploring new areas of material application.

[0003] Currently, the most common grout specimen molds and demolding methods used in civil engineering laboratories are the disassembly type and the impact type. Disassembly molds assemble steel plates using screws and nuts to form a rectangular casting cavity. However, demolding after the specimen has cured requires tediously disassembling each steel plate individually, a time-consuming process that can damage the specimen due to improper operation, increasing the burden on operators and reducing work efficiency. Impact molds are typically made of high-strength plastic with air holes at the bottom, using air pressure from an air pump to eject the specimen. However, this method requires additional air pump equipment, which is costly, and is limited by site conditions. Furthermore, the air holes are prone to clogging during grouting, requiring significant time for cleaning during demolding, and the demolding process can cause wear and tear on the specimen and mold due to excessive air pressure, even posing a safety hazard to workers. Existing mold designs are fixed, lack flexibility in assembly, cannot adapt to the actual number of specimens required, and are difficult to meet the standards for specimen size and surface roughness specified in the codes.

[0004] Given the problems of existing molds, such as complex operation, easy damage to specimens, low efficiency, and impact on test accuracy, there is an urgent need to develop a splicable cement mortar specimen mold equipped with a demolding device and its demolding method, aiming to improve work efficiency, ensure test accuracy, and reduce the burden on operators. Summary of the Invention

[0006] They are not flexible and cannot be adapted to the actual number of test specimens required, and they are all difficult to meet the standards for specimen size and surface roughness in the specifications.

[0007] Given the problems of existing molds, such as complex operation, easy damage to specimens, low efficiency, and impact on test accuracy, there is an urgent need to develop a splicable cement mortar specimen mold equipped with a demolding device and its demolding method, aiming to improve work efficiency, ensure test accuracy, and reduce the burden on operators. Utility Model Content

[0008] This invention aims to address the shortcomings of existing technologies by proposing a modular cement mortar specimen mold equipped with a demolding device and its demolding method. The core of this design lies in providing a specimen mold with a simple structure and higher overall performance, designed to reduce experimental errors and improve the accuracy of test results. Furthermore, by optimizing the operation process, the demolding time of the specimen is significantly shortened, making the operation more convenient and efficient.

[0009] The present invention solves the above-mentioned technical problems by adopting the following technical solution:

[0010] This utility model relates to a mold for splicing cement mortar specimens equipped with a demolding device, comprising a mold and a demolding device. The mold includes a base plate, a splicing base plate, base side plates, splicing side plates, wedge strips, T-shaped transverse diaphragms, and edge plates.

[0011] The mold has two base plates. One side of the base plate is semi-convex, and the other side has a mortise and tenon structure with a specific concave and convex shape. The two base plates are joined together and reinforced with wedges inserted into the mortise and tenon structure to form a single specimen mold base plate. The splicing base plates have multiple plates. Both sides of the plate are provided with mortise and tenon edge structures with the same concave and convex shape as the sides of the base plates. The splicing base plates are joined together in the middle of the two base plates and reinforced with wedges to form a multi-specimen mold base plate.

[0012] The base plate and the splicing base plate have symmetrical grooves centered on their respective planes, with the center lines coinciding.

[0013] The mold has two base side plates. One side of the base side plate is a long rectangle with a surplus end, and the other side has a mortise and tenon structure with a specific concave and convex shape. The two base side plates are spliced ​​together to form a single specimen mold side plate. The spliced ​​side plates have multiple plates. Both sides of the plate are provided with mortise and tenon edge structures with the same concave and convex shape as the side of the base side plate. The spliced ​​side plates are spliced ​​together between the two base side plates to form a multi-specimen mold side plate.

[0014] The mold has a limiting groove at the end of the base side plate corresponding to the position of the side plate. Fixed protrusions are provided at corresponding positions at the bottom of the base side plate and the splicing side plate. The protrusions are adapted to the grooves of the base plate and the splicing plate.

[0015] The mold has multiple T-shaped partitions. Slots and grooves are opened on the inner wall of the splicing side plate corresponding to the position of the T-shaped partitions. One end of the T-shaped partition is set as "T"-shaped, and its size is adapted to the slots and grooves on the splicing side plate.

[0016] The plate mold has two side plates, which are placed parallel to each other. The side plates of the single specimen mold are also placed parallel to each other. The side plates are placed perpendicular to the side plates of the single specimen mold, and the left and right side walls of the side plates are close to the limiting grooves on the inner walls of the side plates of the single specimen mold to form a hollow rectangular frame. The bottom plate of the single specimen mold is vertically located at the bottom of the side plates and the side plates of the single specimen mold, forming a cavity for receiving the single specimen mold. T-shaped transverse partitions are set at equal intervals on the bottom plate and the side plates of the multi-specimen mold, forming equally divided cavities for receiving the multi-specimen mold.

[0017] The mold is made of stainless steel.

[0018] The demolding device includes a horizontal support column, a friction column head, a return spring, a force-generating chamber, a base, a first one-way resistance ball, a second one-way resistance ball, a third one-way resistance ball, hydraulic oil, an oil chamber, a first oil passage pipe, a second oil passage pipe, an oil drain pipe, a lever fixing collar, a fixing button, a pressure lever, a handle, a pressure piston, a pressure chamber, an oil injection plug, an oil drain screw, a pointed lifting column, a lifting chamber, the outer wall of the main body, and a sealing ring;

[0019] The demolding device has two horizontal support columns, symmetrically placed inside the power generation chamber. The columns are cylindrical, with the outer end connected to a friction column head, and the inner end connected by a return spring at the upper section. The lower part fits the expanded tip of the pointed lifting column. The column body is located inside the lifting chamber below the power generation chamber. The outside of the lifting chamber is an oil chamber for storing hydraulic oil. The oil chamber and the lifting chamber are connected to the pressure chamber via oil passage pipes number one and two, respectively. The pressure chamber is equipped with a pressure... The piston and the pressure piston are cylindrical with a cross-sectional area that is 1 / 4 the cross-sectional area of ​​the pointed lifting column. Both are fitted with sealing rings at the bottom. The pressure piston is connected to the pressure lever at the top. The pressure lever has a handle at the tail end and is fixed to the base by a lever fixing ring and a fixing button. A drain screw is provided on the side of the base opposite to the pressure lever. The screw is connected to the drain pipe. The other side of the drain pipe is connected to the lifting cavity. The outer wall of the demolding device body is cylindrical, and an oil injection port is provided at a fixed position on the wall.

[0020] The expansion tip of the lifting column of the demolding device is conical, and the inner end of the horizontal support column is a concave conical surface, the curvature of which closely matches the curvature of the expansion tip of the lifting column.

[0021] The shaft of the pointed lifting column of the demolding device and the shaft of the pressure piston are both cylindrical, and the cross-sectional area of ​​the shaft of the pointed lifting column is four times that of the cross-sectional area of ​​the pressure piston.

[0022] The outer end friction column of the horizontal support column of the demolding device is made of rubber, and the hydraulic oil is incompressible No. 46 anti-wear hydraulic oil.

[0023] The beneficial technical effects of this utility model are as follows:

[0024] Before installation, this mold can be customized as a single-piece mold or a multi-piece mold according to the actual experimental specimen requirements. The splicing mold can be flexibly disassembled and assembled according to the number of specimens, saving time and optimizing resource allocation.

[0025] The base plate and splicing plate are joined together by aligning the sides and reinforcing with wedge strips. The base side plate and splicing side plate are then placed vertically on the base plate by aligning the sides together. The bottom fixing protrusion is inserted into the groove of the base plate. The side plate is then installed on the base plate, and the side wall is secured in the limiting groove of the side plate. The T-shaped transverse partition is inserted into the slot and the corresponding slot. The mold installation is complete. The mold of this utility model is simple and easy to install.

[0026] Use a fine brush to evenly apply lubricating oil into each cavity of the template, then pour the mixed cement mortar into the cavity, and wait for the mortar to solidify to obtain a solid specimen.

[0027] Fix the demolding device to one side of the semi-convex plate of the base plate, adjust the position of the demolding device to ensure that it is centered within the remaining ends of the two side plates, open the oil injection plug, inject the specified volume of hydraulic oil into the oil chamber, tighten the oil injection plug and check whether the oil drain screw is tightened, hold the handle to lift and press back the pressure lever, so that the horizontal support column is pushed outward. The demolding device amplifies the manual force of the pressure section several times through the lever principle and then transfers the force to the horizontal support column, greatly reducing the intensity of manual labor.

[0028] Repeatedly apply pressure levers to continuously push the horizontal support column outwards, squeezing the remaining ends of the mold base side plate. The end of the side plate gradually separates from the specimen. Continue applying pressure, and at the same time, the slot drives the T-shaped transverse partition to separate from the specimen, completing the demolding. The operator can control the amplitude and speed of the pressure levers according to the actual demolding situation, thereby controlling the demolding progress of the demolding device and ensuring the integrity of the specimen. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the connectable mold and demolding device in this utility model;

[0030] Figure 2 This is a schematic diagram of the cross-sectional structure of the demolding device under pressure in this utility model;

[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the demolding device in the force application state in this utility model;

[0032] Figure 4 This is a schematic diagram of the basic base plate and splicing base plate structure in this utility model;

[0033] Figure 5 This is a structural schematic diagram of the basic side plate and the splicing side plate in this utility model;

[0034] Figure 6This is a schematic diagram of the structure of the side plate and the T-shaped transverse partition in this utility model;

[0035] Figure 7 This is a schematic diagram of the single-sample mold and the multi-sample mold in this utility model.

[0036] In the diagram, 1. Base plate, 2. Spliced ​​base plate, 3. Base side plate, 4. Spliced ​​side plate, 5. Wedge strip, 6. T-shaped diaphragm, 7. Side plate, 8. Horizontal support column, 9. Friction column head, 10. Return spring, 11. Force chamber, 12. Base, 13. No. 1 one-way stop ball, 14. No. 2 one-way stop ball, 15. No. 3 one-way stop ball, 16. Hydraulic oil, 17. No. 1 oil passage pipe, 18. No. 2 oil passage pipe, 19. Drain pipe, 20. Oil chamber, 21. Lever fixing collar, 22. Fixing button, 23. Pressure lever, 24. Handle, 25. Pressure piston, 26. Pressure chamber, 27. Oil plug, 28. Drain screw, 29. Pointed lifting column, 30. Lifting chamber, 31. Main body outer wall, 32. Sealing ring. Detailed Implementation

[0037] To illustrate the technical solution and objective of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments:

[0038] like Figure 1-7 As shown, a mold for splicing cement mortar specimens equipped with a demolding device includes a mold and a demolding device. The mold includes a base plate 1, a splicing base plate 2, a base side plate 3, a splicing side plate 4, wedge strips 5, T-shaped transverse diaphragms 6, and side plates 7;

[0039] The base plate 1 of the mold has a symmetrical groove of 50×15×15mm centered on its plane, with the center line coinciding. One side of the plane is semi-convex to accommodate the demolding device during demolding, and the other side has a tenon and mortise structure with a specific concave-convex shape. The two base plates 1 are joined together along the edge tenon and mortise structure and reinforced with wedge strips 5 to form a single specimen mold base plate. The splicing base plate 2 has tenon and mortise edge structures with the same concave-convex shape as the sides of the base plate 1 on both sides. The splicing base plate 2 is joined together between the two base plates 1 and reinforced with wedge strips 5 to form a multi-specimen mold base plate.

[0040] One side of the base side plate 3 of the mold is a long rectangle with a surplus end, serving as a reserved side plate for extrusion demolding by the horizontal support column 8 of the demolding device. A limiting groove is opened at the surplus end corresponding to the position of the side plate 7 for splicing the side plate 7. The other side of the base side plate 3 has a mortise and tenon structure with a specific concave and convex shape. The two base side plates 3 are spliced ​​together to form a single specimen mold side plate. The centerline of the inner wall of the spliced ​​side plate 4 has a slot and a groove corresponding to the position of the T-shaped transverse partition 6. One end of the T-shaped transverse partition 6 is set as "T"-shaped, and its size is adapted to the slot and groove on the spliced ​​side plate 4. Both sides of the spliced ​​side plate 4 are provided with mortise and tenon edge structures with the same concave and convex shape as the side of the base side plate 3. The spliced ​​side plate 4 is spliced ​​together between the two base side plates 3 to form a multi-specimen mold side plate. The bottom of the base side plate 3 and the spliced ​​side plate 4 are provided with 15mm fixing protrusions corresponding to the groove positions. The protrusions are adapted to the grooves of the base base plate 1 and the spliced ​​base plate 2.

[0041] The side plates 7 of the mold are placed in parallel relative positions, and the side plates of the single specimen mold are placed in parallel relative positions. The side plates 7 and the side plates of the single specimen mold are placed perpendicularly, and the left and right side walls of the side plates 7 are tightly attached to the limiting grooves on the inner walls of the side plates of the single specimen mold to form an internally hollow rectangular frame. The bottom plate of the single specimen mold is vertically located at the bottom of the side plates and side plates 7 of the single specimen mold, forming the receiving cavity of the single specimen mold. The T-shaped transverse partitions 6 are set at equal intervals on the bottom plate and side plates of the multi-specimen mold, forming the equally divided receiving cavities of the multi-specimen mold.

[0042] The mold is made of stainless steel, is reusable, and has a long service life.

[0043] The demolding device includes a horizontal support column 8, a friction column head 9, a return spring 10, a force generating chamber 11, a base 12, a first one-way resistance ball 13, a second one-way resistance ball 14, a third one-way resistance ball 15, hydraulic oil 16, a first oil passage pipe 17, a second oil passage pipe 18, an oil drain pipe 19, an oil chamber 20, a lever fixing collar 21, a fixing button 22, a pressure lever 23, a handle 24, a pressure piston 25, a pressure chamber 26, an oil injection plug 27, an oil drain screw 28, a pointed lifting column 29, a lifting chamber 30, a main body outer wall 31, and a sealing ring 32.

[0044] The horizontal support column 8 is cylindrical in shape, with its inner end forming an inwardly concave conical surface. The curvature of this surface matches the curvature of the conical expansion tip of the pointed lifting column 29. The two horizontal support columns 8 are symmetrically placed inside the power generation chamber 11, closely aligning with the expansion tip of the pointed lifting column 29, and their line of symmetry coincides with the centerline of the pointed lifting column 29. The upper section of the inner end of the horizontal support column 8 is connected by a return spring 10, and the outer end is connected to a rubber friction head 9. The rubber material increases the friction with the side plate, facilitating demolding. The body of the pointed lifting column 29 is located inside the lifting chamber 30, which is surrounded by an oil chamber 20. The oil chamber 20 and the lifting chamber 30 are connected to the pressure chamber 26 via oil passage pipe 17 and oil passage pipe 18, respectively. A pressure piston 25 is installed inside the pressure chamber 26. The pressure piston 25 is cylindrical and its cross-sectional area is 1 / 4 of the cross-sectional area of ​​the pointed lifting column 29. Both are fitted with sealing rings 32 at their lower parts to prevent hydraulic oil from overflowing. The upper part of the piston is connected to a pressure lever 23. A handle 24 is installed at the tail end of the pressure lever 23. The head is fixed to the base by a lever fixing collar 21 and a fixing button 22. An oil drain screw 28 is installed on the side of the base opposite to the pressure lever 23. The screw is connected to an oil drain pipe 19. The other side of the oil drain pipe 19 is connected to the lifting chamber 30. The outer wall 31 of the demolding device body is cylindrical, and an oil injection plug 27 is installed at a fixed position on the wall.

[0045] Before using the mold, determine whether to make a single or multiple specimen mold according to the required number of specimens (taking a multiple specimen mold as an example). Join the base plate 1 and splicing base plate 2 together and reinforce them with wedge strips 5. Join the base side plate 3 and splicing side plate 4 together and place them vertically on the base plate. Insert the bottom fixing protrusion into the groove of the base plate. Install the side plate 7 on the base plate and the side wall is stuck in the limiting groove of the side plate. Insert the T-shaped transverse partition 6 into the slot and the slot respectively. The mold installation is complete.

[0046] Apply lubricating oil evenly to each cavity of the template using a fine brush, then inject the mixed cement mortar into the cavity. Once the mortar has solidified, a solid specimen is obtained.

[0047] Fix the demolding device to one side of the semi-convex plate of the base plate 1. Adjust the position of the demolding device to ensure that it is centered within the remaining ends of the two side plates. Open the oil injection plug 27 and inject the specified volume of hydraulic oil 16 into the oil chamber 20. Tighten the oil injection plug 27 and check that the drain screw 28 is tightly closed. Hold the handle 24 of the pressure lever 23 and lift the pressure lever 23, which will drive the pressure piston 25 to move upward. A vacuum suction force is generated inside the demolding device, causing the hydraulic oil 16 to flow out from the oil chamber 20 and into the pressure chamber 26 through the first oil passage pipe 17. After a certain amount of hydraulic oil 16 has entered the pressure chamber 26, the first one-way stop ball 13 will press the jamming opening under the action of liquid pressure to prevent the hydraulic oil 16 from flowing back. By gripping handle 24 and pressing back pressure lever 23, the piston moves downward, applying liquid pressure to the hydraulic oil 16 in pressure chamber 26. The hydraulic oil 16 enters lifting chamber 30 through oil passage pipe 18. Similarly, after a certain amount of hydraulic oil enters lifting chamber 30, one-way stop ball 18 presses against the locking slot, preventing the hydraulic oil 16 from flowing back. According to Pascal's law, the pressure applied to the hydraulic oil 16 by the pressure piston is amplified four times and applied to the bottom surface of the pointed lifting column 29 in lifting chamber 30, causing the pointed lifting column 29 to rise and push the horizontal support column 8 outward. Repeating the lifting and pressing back of pressure lever 23 continuously pushes the horizontal support column 8 outward, squeezing the remaining ends of the mold base side plate 3. The end of the side plate gradually separates from the specimen. Continuing to apply pressure, the main body of the side plate separates from the specimen, and the locking slot simultaneously causes the T-shaped transverse partition 6 to separate from the specimen, completing demolding.

[0048] Turn the drain screw 28 to allow the hydraulic oil 16 in the lifting chamber 30 to flow out through the drain pipe 19. Disassemble each plate of the mold, clean it, and then apply a protective rust-preventive oil.

[0049] The above description is only a preferred embodiment of the present utility model and is not limited to the examples given above. Therefore, under the premise of some technical principles described in the present utility model, further improvements and modifications can be made, which should also fall within the patent coverage of the present utility model.

Claims

1. A mold for splicing cement mortar specimens equipped with a demolding device, characterized in that: The mold includes a base plate (1), a splicing base plate (2), a base side plate (3), a splicing side plate (4), wedge strips (5), a T-shaped diaphragm (6), and a side plate (7). The side plates are placed in parallel relative to each other, and the side plates are placed in parallel relative to each other. The side plates are placed perpendicular to the side plates, and the left and right side walls of the side plates are tightly attached to the inner walls of the side plates to form a hollow rectangular frame. The base plate is located vertically at the bottom of the side plates and the side plates. The demolding device includes a horizontal support column (8), a friction column head (9), a return spring (10), a force generating chamber (11), a base (12), a first one-way resistance ball (13), a second one-way resistance ball (14), a third one-way resistance ball (15), hydraulic oil (16), a first oil passage pipe (17), a second oil passage pipe (18), an oil drain pipe (19), an oil chamber (20), a lever fixing collar (21), a fixing button (22), a pressure lever (23), a handle (24), a pressure piston (25), a pressure chamber (26), an oil injection plug (27), an oil drain screw (28), a pointed lifting column (29), a lifting chamber (30), a main body outer wall (31), and a sealing ring (32). Two horizontal support columns (8) are provided, horizontally and symmetrically placed inside the power generation chamber (11). The whole is cylindrical, with the outer end connected to the friction column head (9), and the upper section of the inner end connected by the return spring (10). The lower part fits the expanded tip of the pointed lifting column (29). The column body of the pointed lifting column (29) is located inside the lifting bundle cavity (30) on the lower side of the power generation chamber (11). The outside of the lifting bundle cavity (30) is the oil chamber (20) for storing hydraulic oil (16). The oil chamber (20) and the lifting bundle cavity (30) are connected to the pressure bundle cavity (26) through the first oil passage pipe (17) and the second oil passage pipe (18) respectively. The pressure bundle cavity (26) is inside A pressure piston (25) is provided in the part. Both the pressure piston (25) and the lower part of the pointed lifting column (29) are fitted with sealing rings (32). The upper part of the piston is connected to a pressure lever (23). A handle (24) is provided at the tail end of the pressure lever (23). The head is fixed on the base (12) by a lever fixing ring (21) and a fixing button (22). An oil drain screw (28) is provided on the side of the base (12) opposite to the pressure lever (23). The screw is connected to an oil drain pipe (19). The other side of the oil drain pipe (19) is connected to the lifting cavity (30). The outer wall (31) of the demolding device body is cylindrical. An oil injection plug (27) is provided at the fixed position of the wall.

2. The modular cement mortar specimen mold with a demolding device as described in claim 1, characterized in that: The mold base plate (1) has two base plates. One side of the base plate (1) is semi-convex, and the other side has a mortise and tenon structure with a specific concave and convex shape. The two base plates (1) are spliced ​​together and wedge strips (5) are inserted into the mortise and tenon structure of the splicing edge to form a single specimen mold base plate. The splicing base plate (2) has multiple base plates. Both sides of the plate are provided with mortise and tenon edge structures with the same concave and convex shape as the side of the base plate (1). The splicing base plate (2) is spliced ​​together in the middle of the two base plates (1) and reinforced with wedge strips (5) to form a multi-specimen mold base plate. The mold has two base side plates (3). One side of the base side plate (3) is a long rectangle with a surplus end, and the other side has a mortise and tenon structure with a specific concave and convex shape. The two base side plates (3) are spliced ​​together to form a single specimen mold side plate. The splicing side plates (4) have multiple pieces. Both sides of the plate are provided with mortise and tenon edge structures with the same concave and convex shape as the side of the base side plate (3). The splicing side plates (4) are spliced ​​together between the two base side plates (3) to form a multi-specimen mold side plate. The mold has two side plates (7), which are respectively vertically arranged between the bottom plate of the single specimen mold and the side plate of the single specimen mold to form the overall cavity of the single specimen mold. There are multiple T-shaped diaphragms (6), which are arranged at equal intervals between the bottom plate and the side plate of the multi-specimen mold to form the equally divided cavity of the multi-specimen mold.

3. The modular cement mortar specimen mold with a demolding device as described in claim 2, characterized in that: The base plate (1) and splicing base plate (2) have symmetrical grooves with the center line overlapping in the center. The base side plate (3) and splicing side plate (4) are provided with fixed protrusions at corresponding positions at the bottom, and the protrusions are adapted to the grooves. The remaining end of the basic side plate (3) is provided with a limiting groove corresponding to the position of the side plate (7). The inner wall centerline of the splicing side plate (4) is provided with a slot and a groove corresponding to the position of the T-shaped diaphragm (6). One end of the T-shaped diaphragm (6) is set as "T" shaped, and its size is adapted to the slot and groove on the splicing side plate.

4. The modular cement mortar specimen mold with a demolding device as described in claim 1, characterized in that: The expanded tip of the lifting column (29) of the demolding device is conical, and the inner end of the horizontal support column (8) is a concave conical surface, the curvature of which matches closely with the curvature of the expanded tip of the lifting column (29). The shaft of the pointed lifting column (29) of the demolding device and the shaft of the pressure piston (25) are both cylindrical, and the cross-sectional area of ​​the shaft of the pointed lifting column (29) is four times the cross-sectional area of ​​the pressure piston (25).

5. The modular cement mortar specimen mold with a demolding device as described in claim 1, characterized in that: The mold is made of stainless steel, the outer end friction column (9) of the horizontal support column (8) of the demolding device is made of rubber, and the hydraulic oil (16) is incompressible No. 46 anti-wear hydraulic oil.

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