Concrete precast element push-off stripping mold

Abstract

The application discloses a concrete prefabricated component pushing type demolding mold, which comprises a bottom mold and a side mold arranged above the bottom mold, a frame dividing box for dividing the side mold into multiple mold cavities is arranged in the side mold, and a pushing rod for pushing the frame dividing box is arranged on the bottom mold. The application has the advantages of simple structure, low cost, convenient demolding and reduced component cracking.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a push-type demolding mold for precast concrete components. Background Technology

[0002] Existing molds for small precast components have complex structures and high manufacturing costs. After curing, demolding is usually done manually or by flipping the components and using their own weight for impact demolding. Demolding requires a lot of manpower, is inefficient, and labor-intensive. Due to the high friction between the components and the mold, flipping demolding makes it difficult to remove all components at once, requiring repeated operations, resulting in poor stability and reduced demolding efficiency. Furthermore, this demolding method is prone to causing chipped corners and cracks in concrete components. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a push-type demolding mold for precast concrete components that is simple in structure, low in cost, easy to demold, and can reduce component cracking.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A push-type demolding mold for precast concrete components includes a bottom mold and a side mold disposed above the bottom mold. The side mold is provided with a dividing frame for dividing the side mold into multiple cavities, and the bottom mold is provided with a push rod for pushing the dividing frame.

[0006] As a further improvement to the above technical solution: the push rod is equipped with an elastic return structure and a limiting structure for returning the push rod to a position where the upper end face is flush with the upper surface of the bottom mold.

[0007] As a further improvement to the above technical solution: the bottom mold is provided with a mounting seat, the push rod passes through the mounting seat, the limiting structure and the elastic return structure are both provided in the mounting seat, the elastic return structure includes a return spring sleeved on the push rod, one end of the return spring abuts against the mounting seat, and the other end abuts against the limiting structure.

[0008] As a further improvement to the above technical solution: the bottom mold is provided with a mounting seat, the push rod passes through the mounting seat, the limiting structure is provided inside the mounting seat, and the elastic return structure is provided outside the mounting seat. The elastic return structure includes a return spring sleeved on the push rod and a thrust stop fixed on the push rod. One end of the return spring abuts against the mounting seat, and the other end abuts against the thrust stop.

[0009] As a further improvement to the above technical solution: the mounting base or the bottom mold is provided with a sealing element for sealing the push rod.

[0010] As a further improvement to the above technical solution: the mounting base includes a base fixedly connected to the bottom mold and an end cap detachably connected to the base.

[0011] As a further improvement to the above technical solution: the limiting structure includes a limiting step, a shaft retaining ring, or multiple protrusions arranged along the circumference of the push rod.

[0012] As a further improvement to the above technical solution: a retractable sealing gasket is laid on the bottom mold, and the bottom mold, side mold and sealing gasket are connected by fasteners.

[0013] As a further improvement to the above technical solution: the upper surface of the sealing gasket is provided with patterns and / or fonts.

[0014] As a further improvement to the above technical solution: the sealing gasket is a rubber gasket, a silicone gasket, or a polyurethane gasket.

[0015] Compared with the prior art, the advantages of the present invention are as follows: The push-type demolding mold for precast concrete components disclosed in the present invention has a simple structure and does not contain complex or high-precision parts. During demolding, the push rod acts directly on the dividing frame, and the dividing frame effectively bears the demolding pressure, avoiding the risk of component cracking caused by the demolding pressure acting directly on the component; it can reduce the number of surfaces on which the component needs to be set with a demolding slope, which would lead to an increase in the amount of concrete used in the component, thereby reducing concrete waste; it also eliminates the need to set a push rod for each component, reducing the number of push rod structures and significantly reducing mold costs; at the same time, since the push rod needs to penetrate the bottom mold, there is a risk of failure such as grout leakage. Reducing the number of push rods means that the probability of failure such as grout leakage can be reduced.

[0016] Furthermore, for special components with patterns and / or lettering on the surface, the requirements can be met by processing the corresponding patterns and lettering on the upper surface of the sealing gasket. Compared with processing the patterns and lettering directly on the bottom mold (the bottom mold and side mold are usually steel molds), the process is simpler and the manufacturing cost is lower. Attached Figure Description

[0017] Figure 1 This is a top view schematic diagram of the top-push type demolding mold for precast concrete components of the present invention.

[0018] Figure 2 This is a schematic diagram of the method of using the push-type demolding mold for precast concrete components according to the present invention.

[0019] Figure 3 This is a cross-sectional structural diagram of Embodiment 1 of the present invention.

[0020] Figure 4 This is a cross-sectional structural diagram of the demolding process in Embodiment 1 of the present invention.

[0021] Figure 5 This is a cross-sectional structural diagram of Embodiment 2 of the present invention.

[0022] Figure 6 This is a cross-sectional structural diagram of Embodiment 3 of the present invention.

[0023] Figure 7 This is a cross-sectional structural diagram of the demolding process in Embodiment 3 of the present invention.

[0024] The labels in the diagram represent: 1. Bottom mold; 2. Side mold; 21. Cavity; 3. Dividing frame; 4. Push rod; 5. Elastic return structure; 51. Return spring; 52. Thrust stop; 6. Limiting structure; 7. Mounting seat; 71. Base; 72. End cap; 8. Seal; 9. Sealing gasket; 10. Fastener. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] Figures 1 to 4 This invention illustrates an embodiment of a push-type demolding mold for precast concrete components. The mold includes a bottom mold 1 and a side mold 2 positioned above the bottom mold 1. The bottom mold 1 and the side mold 2 are an integral structure; however, in other embodiments, a separate structure can be used, fixedly connected by welding, fasteners 10, etc. The side mold 2 is provided with a dividing frame 3 for dividing the side mold 2 into multiple cavities 21. The dividing frame 3 is a cross-shaped frame, dividing the side mold 2 into four cavities 21. The bottom mold 1 is provided with a push rod 4 for pushing the dividing frame 3.

[0028] This push-type demolding mold for precast concrete components has a simple structure and does not contain complex or high-precision parts. During demolding, the push rod 4 acts directly on the dividing frame 3, which effectively bears the demolding pressure, avoiding the risk of cracking caused by the demolding pressure acting directly on the component. When the push rod 4 pushes out the dividing frame 3, the component can be demolded smoothly, thus greatly reducing the demolding difficulty. This reduces the number of surfaces that need to be set with demolding slope, which would increase the amount of concrete used in the component, thereby reducing concrete waste. It also eliminates the need for a push rod 4 for each component, reducing the number of push rods and significantly lowering the mold cost. At the same time, since the push rod 4 needs to penetrate the bottom mold 1, there is a risk of failure such as grout leakage. Reducing the number of push rods 4 means that the probability of failure such as grout leakage can be reduced. In use, first position the partition frame 3 inside the side mold 2, then pour concrete, cure it, etc. After the component is formed, push rod 4 pushes the partition frame 3 upward. During the process of partition frame 3 rising, the component rises with it until the component separates from the mold and push rod 4 stops rising. Finally, the component is separated from the partition frame 3, and demolding is completed.

[0029] Furthermore, in this embodiment, the push rod 4 is equipped with an elastic return structure 5 and a limiting structure 6 for returning the push rod 4 to a position where its upper end face is flush with the upper surface of the bottom mold 1. During the push-out process, the push rod 4 compresses the elastic return structure 5. After demolding, the push rod 4 returns to its original position under the action of the elastic return structure 5. The limiting structure 6 ensures that the upper end face of the push rod 4 remains flush with the upper surface of the bottom mold 1, allowing it to be directly used in the next production cycle. There are no other auxiliary parts that need to be installed and removed during the production process, eliminating the need for personnel or equipment investment in the disassembly and assembly of auxiliary parts, which is more conducive to achieving automated continuous production.

[0030] Furthermore, in this embodiment, the bottom mold 1 is provided with a mounting base 7, the push rod 4 passes through the mounting base 7, and both the limiting structure 6 and the elastic return structure 5 are located within the mounting base 7. The elastic return structure 5 includes a return spring 51 sleeved on the push rod 4, with one end of the return spring 51 abutting against the mounting base 7 and the other end abutting against the limiting structure 6. In this structure, the limiting structure 6, on the one hand, cooperates with the mounting base 7 to position the push rod 4, ensuring that the upper end surface of the push rod 4 is flush with the upper surface of the bottom mold 1 after returning to its original position; on the other hand, it provides an action surface for the return spring 51, using the return spring 51 to drive the push rod 4 to return to its original position. The limiting structure 6 can be, for example, a limiting step, a shaft retaining ring, or multiple protrusions arranged along the circumference of the push rod 4, all of which can achieve the above two functions. Having both the limiting structure 6 and the elastic return structure 5 located within the mounting base 7 helps reduce the vertical dimensions of the mold while avoiding exposure, providing a certain degree of protection for the limiting structure 6 and the elastic return structure 5.

[0031] As a preferred technical solution, in this embodiment, the mounting base 7 has a T-shaped structure, with the smaller diameter end penetrating through the bottom mold 1 and the larger diameter end exposed and welded in place. The mounting base 7 is equipped with a sealing element 8 (e.g., a common O-ring) for sealing the push rod 4. Since the push rod 4 needs to move up and down, there will be a gap between it and the mounting base 7; providing the sealing element 8 helps prevent slurry leakage. Of course, in other embodiments, with adjustments to the structure of the mounting base 7, the sealing element 8 can also be provided on the bottom mold 1.

[0032] As a preferred technical solution, in this embodiment, the mounting base 7 includes a base 71 fixedly connected to the bottom mold 1 and an end cap 72 detachably connected to the base 71. This structure facilitates the disassembly of the mounting base 7 for replacement of the return spring 51, the limiting structure 6, etc.

[0033] Example 2

[0034] Figure 5 This paper illustrates another embodiment of the precast concrete component push-type demolding mold of the present invention. This embodiment is basically the same as the first embodiment, except that in this embodiment, the bottom mold 1 is provided with a mounting base 7, the push rod 4 passes through the mounting base 7, the limiting structure 6 is located inside the mounting base 7, and the elastic return structure 5 is located outside the mounting base 7. The elastic return structure 5 includes a return spring 51 sleeved on the push rod 4 and a thrust stop 52 fixed on the push rod 4. One end of the return spring 51 abuts against the mounting base 7, and the other end abuts against the thrust stop 52. This embodiment has a slightly increased vertical dimension compared to the first embodiment, and a thrust stop 52 needs to be provided on the push rod 4. The structure of the thrust stop 52 can be the same as the limiting structure 6.

[0035] Example 3

[0036] Figures 6 to 7 This paper illustrates another embodiment of the precast concrete component push-type demolding mold of the present invention. This embodiment is essentially the same as Embodiments 1 and 2, except that in this embodiment, a retractable sealing gasket 9 is laid on the bottom mold 1. The bottom mold 1, the side mold 2, and the sealing gasket 9 are connected by fasteners 10 (meaning that the bottom mold 1 and the side mold 2 are no longer a single-piece structure). Since the bottom mold 1 and the side mold 2 are not a single-piece structure, the sealing gasket 9 helps to seal the gap between the bottom mold 1 and the side mold 2, preventing grout leakage. It also eliminates the need for a sealing element 8, and the push rod 4 will not leave any marks on the component during demolding. Using a retractable sealing gasket 9, the sealing gasket 9 can deform when the push rod 4 pushes the component for demolding, facilitating demolding.

[0037] As a preferred technical solution, the upper surface of the sealing gasket 9 is provided with patterns and / or lettering (specifically, as shown in the image). Figure 6As shown, its upper surface has an uneven structure. For special components with patterns and / or lettering on the surface, the corresponding patterns and lettering can be machined on the upper surface of the sealing gasket 9 to meet the requirements. Compared with directly machining the patterns and lettering on the bottom mold 1 (the bottom mold 1 and the side mold 2 are usually steel molds), the process is simpler and the manufacturing cost is lower.

[0038] As a preferred technical solution, the sealing gasket 9 can be, for example, a rubber gasket, a silicone gasket, or a polyurethane gasket, which is easily deformed under pressure, has good sealing performance, and is wear-resistant and has a long service life.

[0039] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A push-type demolding mold for precast concrete components, comprising a bottom mold (1) and a side mold (2) disposed above the bottom mold (1), characterized in that: The side mold (2) is provided with a dividing frame (3) for dividing the side mold (2) into multiple cavities (21). The bottom mold (1) is provided with a push rod (4) for pushing the dividing frame (3). After the component is formed, the push rod (4) pushes the dividing frame (3) upward. During the process of the dividing frame (3) rising, the component rises with it until the component is separated from the side mold (2) and the push rod (4) stops rising. Finally, the component is separated from the dividing frame (3) and demolding is completed. The bottom mold (1) is provided with a retractable sealing gasket (9). The bottom mold (1), the side mold (2) and the sealing gasket (9) are connected by fasteners (10). When the push rod (4) pushes the demolding, the sealing gasket (9) can deform.

2. The push-type demolding mold for precast concrete components according to claim 1, characterized in that: The push rod (4) is equipped with an elastic return structure (5) and a limiting structure (6) for returning the push rod (4) to the upper end face flush with the upper surface of the bottom mold (1).

3. The push-type demolding mold for precast concrete components according to claim 2, characterized in that: The bottom mold (1) is provided with a mounting base (7), the push rod (4) passes through the mounting base (7), the limiting structure (6) and the elastic return structure (5) are both provided in the mounting base (7), the elastic return structure (5) includes a return spring (51) sleeved on the push rod (4), one end of the return spring (51) abuts against the mounting base (7), and the other end abuts against the limiting structure (6).

4. The push-type demolding mold for precast concrete components according to claim 2, characterized in that: The bottom mold (1) is provided with a mounting seat (7), the push rod (4) passes through the mounting seat (7), the limiting structure (6) is provided inside the mounting seat (7), and the elastic return structure (5) is provided outside the mounting seat (7). The elastic return structure (5) includes a return spring (51) sleeved on the push rod (4) and a thrust stop part (52) fixed on the push rod (4). One end of the return spring (51) abuts against the mounting seat (7), and the other end abuts against the thrust stop part (52).

5. The push-type demolding mold for precast concrete components according to claim 3 or 4, characterized in that: The mounting base (7) or the bottom mold (1) is provided with a sealing element (8) for sealing the push rod (4).

6. The push-type demolding mold for precast concrete components according to claim 3 or 4, characterized in that: The mounting base (7) includes a base (71) fixedly connected to the bottom mold (1) and an end cap (72) detachably connected to the base (71).

7. The push-type demolding mold for precast concrete components according to claim 3 or 4, characterized in that: The limiting structure (6) includes a limiting step, a shaft retaining ring, or multiple protrusions arranged along the circumference of the push rod (4).

8. The push-type demolding mold for precast concrete components according to any one of claims 1 to 4, characterized in that: The upper surface of the sealing gasket (9) is provided with patterns and / or lettering.

9. The push-type demolding mold for precast concrete components according to any one of claims 1 to 4, characterized in that: The sealing gasket (9) is a rubber gasket, a silicone gasket, or a polyurethane gasket.

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