A pushing-type demoulding mold for precast concrete components

Abstract

The present invention discloses a pushing-type demolding mold for concrete precast members, which includes a bottom mold and side molds provided on the bottom mold. At least one cavity is provided in the side molds, and a push rod for ejecting the members in the cavity is fixedly provided below the cavity. The push rod is provided with an elastic return structure and a limiting structure for returning the push rod to a position where its upper end surface is flush with the upper surface of the bottom mold. The present invention has the advantages of simple structure, low cost, convenient demolding, and being helpful for improving production efficiency, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and particularly relates to a push-type demolding mold for concrete precast components. Background Art

[0002] The existing grouped molds for small precast components have a complex structure and a relatively high mold manufacturing cost. After the components are cured, manual demolding or impact demolding by using the self-weight of the components after flipping is usually adopted. The disassembly and assembly demolding operation is complex, with a large labor input and low efficiency; due to the large friction force between the components and the mold, it is difficult to demold all the components at one time by the flipping method, and it needs to be operated repeatedly for several times, with poor stability, which reduces the demolding efficiency. Moreover, concrete is a brittle material and is prone to cracking and corner dropping under impact external loads, and this demolding method is likely to cause corners and cracks of the concrete components to be missing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a push-type demolding mold for concrete precast components with a simple structure, low cost, convenient demolding, and helpful for improving production efficiency.

[0004] To solve the above technical problem, the present invention adopts the following technical solutions:

[0005] A push-type demolding mold for concrete precast components, including a bottom mold and side molds arranged on the bottom mold. At least one cavity is arranged inside the side molds, and a push rod for demolding the components in the cavity is fixedly arranged below the cavity. The push rod is provided with an elastic return structure and a limit structure for making the push rod return to a position where the upper end surface is flush with the upper surface of the bottom mold.

[0006] As a further improvement of the above technical solution: an installation seat is arranged on the bottom mold, the push rod penetrates through the installation seat, and both the limit structure and the elastic return structure are arranged inside the installation seat. The elastic return structure includes a return spring sleeved on the push rod, one end of the return spring abuts against the installation seat, and the other end abuts against the limit structure.

[0007] As a further improvement of the above technical solution: an installation seat is arranged on the bottom mold, the push rod penetrates through the installation seat, the limit structure is arranged inside the installation seat, and the elastic return structure is arranged outside the installation seat. The elastic return structure includes a return spring sleeved on the push rod and a thrust portion fixedly arranged on the push rod. One end of the return spring abuts against the installation seat, and the other end abuts against the thrust portion.

[0008] As a further improvement of the above technical solution: a seal for sealing the push rod is arranged inside the installation seat or the bottom mold.

[0009] As a further improvement of the above technical solution: The mounting seat includes a base fixedly connected to the bottom mold and an end cover detachably connected to the base.

[0010] As a further improvement of the above technical solution: The limiting structure includes a limiting step, a shaft retaining ring or a plurality of convex parts arranged along the circumferential direction of the ejector rod.

[0011] As a further improvement of the above technical solution: A telescopic sealing gasket is laid on the bottom mold, and the bottom mold, side mold and sealing gasket are connected by fasteners.

[0012] As a further improvement of the above technical solution: The upper surface of the sealing gasket is provided with patterns and / or fonts.

[0013] As a further improvement of the above technical solution: The sealing gasket is a rubber gasket, a silica gel gasket or a polyurethane gasket.

[0014] Compared with the prior art, the advantages of the present invention are as follows: Concrete is a brittle material and is prone to cracking and corner chipping under impact external acting loads. The present invention uses an ejector rod to push for demolding. By setting an appropriate external demolding pressure, a demolding acting load similar to static pressure is realized, enabling the component to be demolded stably and smoothly. Demolding with an impact load is more conducive to ensuring the quality and qualification rate of the component; during the pushing process of the ejector rod, the elastic return structure is compressed. After demolding, the ejector rod returns under the action of the elastic return structure. The limiting structure is used to ensure that the upper end surface of the ejector rod is flush with the upper surface of the bottom mold, which can be directly used for the next production cycle without additional auxiliary parts that need to be installed and removed during the production process, eliminating the input of personnel or equipment for the disassembly and assembly of the auxiliary parts, and is more conducive to realizing automated continuous production.

[0015] Furthermore, for special components with patterns and / or fonts on the surface, corresponding patterns and fonts can be processed on the upper surface of the sealing gasket to meet the requirements. Compared with directly processing patterns and fonts on the bottom mold (the bottom mold and side mold are usually steel molds), the process is simpler and the manufacturing cost is lower. Brief Description of the Drawings

[0016] Figure 1 is a front structural schematic diagram of the push-type demolding mold for concrete precast components of the present invention.

[0017] Figure 2 is a back structural schematic diagram of the push-type demolding mold for concrete precast components of the present invention.

[0018] Figure 3 is a sectional structural schematic diagram of Embodiment 1 of the present invention.

[0019] Figure 4 is a sectional structural schematic diagram during demolding of Embodiment 1 of the present invention.

[0020] Figure 5 It is a schematic cross-sectional structure diagram of the second embodiment of the present invention.

[0021] Figure 6 It is a schematic cross-sectional structure diagram of the third embodiment of the present invention.

[0022] Figure 7 It is a schematic cross-sectional structure diagram when the third embodiment of the present invention is demolded.

[0023] In the figure, each label represents: 1, bottom mold; 2, side mold; 21, cavity; 3, component; 4, ejector pin; 5, elastic return structure; 51, return spring; 52, thrust portion; 6, limiting structure; 7, mounting seat; 71, base; 72, end cover; 8, seal; 9, gasket; 10, fastener. Detailed implementation manners

[0024] The present invention will be further described in detail below in conjunction with the specification drawings and specific embodiments.

[0025] Embodiment 1

[0026] Figures 1 to 4 An embodiment of the push-type mold for concrete precast components of the present invention is shown. The push-type demolding mold for concrete precast components in this embodiment includes a bottom mold 1 and a side mold 2 provided on the bottom mold 1. The bottom mold 1 and the side mold 2 are of an integral structure. Of course, in other embodiments, a split structure may also be adopted and fixedly connected by means such as welding and fasteners 10; multiple cavities 21 are provided inside the side mold 2 to facilitate the production of multiple components at one time. An ejector pin 4 for ejecting the component 3 in the cavity 21 is fixedly provided below the cavity 21. The ejector pin 4 is provided with an elastic return structure 5 and a limiting structure 6 for returning the ejector pin 4 to a position where the upper end surface is flush with the upper surface of the bottom mold 1.

[0027] The ejector pin 4 is used for pushing and demolding. By setting an appropriate external demolding pressure, a demolding load approximately equivalent to a static pressure is realized, enabling the component 3 to be stably and smoothly demolded. Compared with demolding by an impact load, it is more conducive to ensuring the quality and qualification rate of the component 3; during the pushing process of the ejector pin 4, the elastic return structure 5 is compressed. After demolding, the ejector pin 4 returns under the action of the elastic return structure 5. The limiting structure 6 is used to ensure that the upper end surface of the ejector pin 4 is flush with the upper surface of the bottom mold 1, and it can be directly used for the next production cycle without additional auxiliary components that need to be installed and removed during the production process, eliminating the personnel or equipment input for the disassembly and assembly of the auxiliary components, and being more conducive to realizing automated continuous production.

[0028] Further, in this embodiment, an installation seat 7 is provided on the bottom mold 1. The top push rod 4 penetrates through the installation seat 7, and both the limiting structure 6 and the elastic return structure 5 are arranged inside the installation seat 7. The elastic return structure 5 includes a return spring 51 sleeved on the top push rod 4. One end of the return spring 51 abuts against the installation seat 7, and the other end abuts against the limiting structure 6. In this structure, on the one hand, the limiting structure 6 is in limiting cooperation with the installation seat 7 to position the top push rod 4, ensuring that the upper end surface of the top push rod 4 is flush with the upper surface of the bottom mold 1 after returning; on the other hand, it provides a working surface for the return spring 51 to drive the top push rod 4 to return by using the return spring 51. Among them, the limiting structure 6 can be, for example, a limiting step, a shaft retaining ring, or multiple convex parts arranged along the circumferential direction of the top push rod 4, etc., which can all achieve the above two functions. Arranging both the limiting structure 6 and the elastic return structure 5 inside the installation seat 7 is beneficial to reducing the vertical size of the mold and avoiding exposure, providing certain protection for the limiting structure 6 and the elastic return structure 5.

[0029] As a preferred technical solution, in this embodiment, the installation seat 7 is of a T-shaped structure. The end with a smaller diameter penetrates through the bottom mold 1, and the end with a larger diameter is exposed and welded and fixed. A sealing member 8 (such as a common O-ring) for sealing the top push rod 4 is provided inside the installation seat 7. Since the top push rod 4 needs to move up and down, there will be a gap between it and the installation seat 7. Setting the sealing member 8 is beneficial to preventing the leakage of the slurry. Of course, in other embodiments, with the adjustment of the structure of the installation seat 7, the sealing member 8 can also be set on the bottom mold 1.

[0030] As a preferred technical solution, in this embodiment, the installation seat 7 includes a base 71 fixedly connected to the bottom mold 1 and an end cover 72 detachably connected to the base 71. Adopting this structure facilitates disassembling the installation seat 7 to replace the return spring 51, the limiting structure 6, etc.

[0031] Embodiment Two

[0032] Figure 5 Another embodiment of the push-type mold for concrete precast components of the present invention is shown. The push-type mold for concrete precast components in this embodiment is basically the same as that in Embodiment One, except that in this embodiment, an installation seat 7 is provided on the bottom mold 1. The top push rod 4 penetrates through the installation seat 7. The limiting structure 6 is arranged inside the installation seat 7, and the elastic return structure 5 is arranged outside the installation seat 7. The elastic return structure 5 includes a return spring 51 sleeved on the top push rod 4 and a thrust portion 52 fixed on the top push rod 4. One end of the return spring 51 abuts against the installation seat 7, and the other end abuts against the thrust portion 52. The vertical size of this embodiment is increased compared to Embodiment One, and at the same time, a thrust portion 52 needs to be provided on the top push rod 4. The structure of the thrust portion 52 can be the same as that of the limiting structure 6.

[0033] Embodiment Three

[0034] Figures 6 to 7 Another embodiment of the jacking die for precast concrete members of the present invention is shown. The jacking die for precast concrete members in this embodiment is basically the same as those in the first and second embodiments. The difference is that in this embodiment, a telescopic gasket 9 is laid on the bottom die 1, and the bottom die 1, side die 2 and gasket 9 are connected by fasteners 10 (which also means that the bottom die 1 and side die 2 are no longer an integral structure). Since the bottom die 1 and side die 2 are not an integral structure, setting the gasket 9 helps to seal the gap between the bottom die 1 and side die 2, avoiding slurry leakage. At the same time, there is no need to set the seal 8, and no mark will be left on the member 3 when the ejector rod 4 jacks for demolding. With the telescopic gasket 9, when the ejector rod 4 jacks for demolding, the gasket 9 can deform, facilitating demolding.

[0035] As a preferred technical solution, the upper surface of the gasket 9 is provided with patterns and / or fonts (specifically as Figure 6 shown, its upper surface is an uneven structure). For special members 3 with patterns and / or fonts on the surface, corresponding patterns and fonts can be processed on the upper surface of the gasket 9 to meet the requirements. Compared with directly processing patterns and fonts on the bottom die 1 (the bottom die 1 and side die 2 are usually steel dies), the process is simpler and the manufacturing cost is lower.

[0036] As a preferred technical solution, the gasket 9 can be, for example, a rubber gasket, a silica gel gasket or a polyurethane gasket, which is easy to be deformed under pressure, has good sealing performance, and is wear-resistant and has a long service life.

[0037] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A push-type demoulding mold for precast concrete components, characterized by: The invention comprises a bottom mold (1) and a side mold (2), wherein at least one cavity (21) is provided in the side mold (2), a push rod (4) for removing a component (3) in the cavity (21) is fixedly provided below the cavity (21), the push rod (4) is provided with an elastic return structure (5) and a limit structure (6) for returning the push rod (4) to a position where the upper end face is flush with the upper surface of the bottom mold (1), a retractable sealing gasket (9) is laid on the bottom mold (1), the side mold (2) is provided on the sealing gasket (9), the bottom mold (1), the side mold (2) and the sealing gasket (9) are connected by a fastener (10), the push rod (4) is located below the sealing gasket (9), and the sealing gasket (9) can be deformed when the push rod (4) pushes the component (3) out of the mold.

2. The push-type demoulding mold for precast concrete components according to claim 1, 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) and the elastic return structure (5) are both provided in the mounting seat (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 seat (7), and the other end abuts against the limiting structure (6).

3. The push-type demoulding mold for precast concrete components according to claim 1, 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 in 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 portion (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 portion (52).

4. The push-type demoulding mold for precast concrete components according to claim 2 or 3, characterized in that: A sealing member (8) for sealing the push rod (4) is provided in the mounting seat (7) or the bottom mold (1).

5. The push-type demoulding mold for precast concrete components according to claim 2 or 3, characterized in that: The mounting seat (7) comprises a base (71) fixedly connected to the bottom mold (1) and an end cover (72) detachably connected to the base (71).

6. The push-type demoulding mold for precast concrete components according to claim 2 or 3, characterized in that: The limiting structure (6) comprises a limiting step, a shaft retaining ring, or a plurality of protrusions arranged along the circumferential direction of the push rod (4).

7. The push-type demoulding mold for precast concrete components according to any one of claims 1 to 3, characterized in that: The upper surface of the sealing gasket (9) is provided with patterns and / or fonts.

8. The push-type demoulding mold for precast concrete components according to any one of claims 1 to 3, characterized in that: The sealing pad (9) is a rubber pad, a silicone pad or a polyurethane pad.

Images