Anti-floating positioning device for high-strength thin-wall core mold

Abstract

The utility model relates to the technical field of core mold positioning devices, and discloses a high-strength thin-wall core mold anti-floating positioning device which comprises a positioning hollow column and a positioning sliding column, the positioning sliding column is inserted into an inner cavity of the positioning hollow column, a slotting plate is assembled at the top of the positioning hollow column, a positioning pin shaft is inserted outside the positioning sliding column, and the positioning pin shaft is connected with the slotting plate. Vertical grooves are formed in the two sides of an inner cavity of the positioning hollow column, annular grooves are formed in the bottoms of the vertical grooves, positioning locking grooves are formed in the front and back sides of the upper end of each annular groove, guide blocks are slidably connected to inner cavities of the positioning locking grooves, and the guide blocks are welded to the outer portion of the positioning sliding column. According to the anti-floating positioning device for the high-strength thin-wall core mold, accidental rotation possibly occurring in the using process is effectively restrained, the lasting stability of the mold in the mold closing state is improved, the positioning function of the whole device is achieved through a pure mechanical self-locking structure, and the reliable anti-floating performance can be maintained without depending on an external power source.

Description

Technical Field

[0001] This utility model relates to the technical field of core mold positioning devices, specifically a high-strength thin-walled core mold anti-buoyancy positioning device. Background Technology

[0002] In the field of building component molding technology, precise positioning and anti-buoyancy control of the core mold during the production of precast concrete components are always key aspects to ensure product quality. Existing positioning devices typically use a multi-component, modular structure with threaded fastening or hydraulic drive to fix the core mold. Operators need to repeatedly adjust the position of each component and apply significant force to complete the positioning. This is especially true in the production of thin-walled components, where traditional solutions have even stricter requirements for operating space and assembly precision.

[0003] Existing technologies mostly employ a combination of linear sliding guide mechanisms and independent locking components. During axial locking, the lack of a radial constraint mechanism makes the mandrel prone to longitudinal displacement or lateral swaying due to casting vibrations. While some devices incorporate rotary locking structures, specialized tools are required for angle alignment, and no secondary safety mechanism is provided. Over time, mechanical wear can lead to loosening of the positioning system. More significantly, most positioning systems require a continuous supply of compressed air or electricity to maintain the locking state, posing a safety risk due to power supply interruptions under complex operating conditions. Furthermore, external power sources increase equipment maintenance costs and complicate on-site wiring. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a high-strength thin-walled core mold anti-buoyancy positioning device to solve the technical problem mentioned above where the lack of a radial constraint mechanism during axial clamping leads to the core mold being prone to longitudinal displacement or lateral swaying due to casting vibration.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-strength thin-walled core mold anti-buoyancy positioning device, comprising: a positioning hollow column and a positioning sliding column, wherein the positioning sliding column is inserted into the inner cavity of the positioning hollow column, a slotted plate is fitted on the top of the positioning hollow column, and a positioning pin is inserted into the outside of the positioning sliding column.

[0006] The inner cavity of the positioning hollow column has vertical grooves on both sides, and an annular groove at the bottom of the vertical groove. The upper end of the annular groove has positioning locking grooves on both sides. The inner cavity of the positioning locking groove is slidably connected to a guide block, which is welded to the outside of the positioning column. The inner cavity of the positioning hollow column is slidably connected to a sliding disc, and a return spring is connected between the sliding disc and the positioning hollow column.

[0007] Preferably, the top of the sliding disc is equipped with a rubber pad, and the top of the rubber pad has anti-slip texture. The rubber pad is made of silicone rubber, and the anti-slip texture on the surface is distributed in a diamond grid pattern with a grid depth of 0.5mm, which can effectively increase the friction coefficient with the contact surface of the core mold and prevent lateral displacement caused by concrete flow.

[0008] Preferably, a second flange and a first flange are respectively provided at the top of the positioning slide column and the bottom of the positioning hollow column. The second flange and the first flange are connected to the positioning slide column and the positioning hollow column respectively via a connecting rod. A seated bearing is connected between the positioning slide column and the second flange. The first flange is equipped with 8 sets of M12 high-strength bolt connection holes, and the second flange is provided with a 360° rotation scale mark, which, together with the seated bearing, enables a ±5° fine adjustment function. The seated bearing has a built-in PTFE composite bushing with a friction coefficient as low as 0.05, ensuring smooth rotation adjustment.

[0009] Preferably, the slotted plate has uniformly formed grooves on its inner side, and the grooves are adapted to the positioning pin. The grooves are designed with an isosceles trapezoidal cross section, with a groove opening width of 8mm and a groove bottom width of 12mm. They form a wedge fit with the tapered end of the positioning pin, and the single-sided fit clearance is controlled within the range of 0.1 to 0.2mm to achieve precise locking of axial displacement.

[0010] Preferably, the guide block is slidably connected to the inner cavity of the vertical groove, the annular groove and the positioning locking groove, and the exterior of the guide block is polished. The sliding surface of the guide block is coated with molybdenum disulfide solid lubricant, which reduces the frictional resistance when the annular groove turns to meet the requirements of single-person manual adjustment.

[0011] Preferably, the bottom of the positioning hollow column is open, and a bottom cover is threadedly connected to the bottom of the positioning hollow column. The bottom cover is connected to the return spring, and the bottom cover uses an M20×1.5 fine thread connection. It has a built-in wave spring washer, which can realize three-level adjustment of the return spring preload. The open design facilitates the cleaning of internal concrete residue, and the entire structure does not need to be disassembled for maintenance.

[0012] Compared with the prior art, this utility model provides a high-strength thin-walled core mold anti-buoyancy positioning device, which has the following beneficial effects:

[0013] This high-strength, thin-walled core mold anti-buoyancy positioning device features a nested design of a hollow positioning column and a positioning slide column, combined with a guide structure of vertical and annular grooves. This allows the positioning slide column to quickly enter the locking state through rotation during insertion, simplifying the complex operation process of traditional positioning devices. The sliding engagement mechanism between the guide block and the positioning locking groove, combined with the continuous lifting force provided by the spring-driven sliding disc, ensures stable engagement of the positioning slide column in both axial and radial dimensions, avoiding the risk of positioning failure due to vibration or external forces. The secondary locking structure formed by the slotted plate and the positioning pin further enhances the angle fixation effect, effectively suppressing accidental rotation that may occur during use and improving the long-term stability of the mold in the closed state. The entire device achieves its positioning function through a purely mechanical self-locking structure, maintaining reliable anti-buoyancy performance without relying on an external power source. Attached Figure Description

[0014] Figure 1 This is a front view of the present utility model;

[0015] Figure 2 This is a front sectional view of the present invention;

[0016] Figure 3 This is a sectional view of the left side of this utility model.

[0017] In the figure: 1. Hollow positioning column; 11. First flange; 12. Slotted plate; 13. Return spring; 14. Sliding plate; 2. Positioning slide column; 21. Second flange; 22. Positioning pin; 3. Vertical groove; 31. Annular groove; 32. Guide block; 33. Positioning locking groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model provides a technical solution, please refer to Figure 1 , Figure 2 and Figure 3 A high-strength thin-walled core mold anti-buoyancy positioning device includes: a positioning hollow column 1 and a positioning sliding column 2. The positioning sliding column 2 is inserted into the inner cavity of the positioning hollow column 1. A slotted plate 12 is mounted on the top of the positioning hollow column 1. A positioning pin 22 is inserted into the outside of the positioning sliding column 2.

[0020] The positioning hollow column 1 is made of high-strength aluminum alloy through extrusion molding process, and its wall thickness is controlled within the range of 2-3mm to ensure structural strength while achieving lightweight design. The surface of the positioning sliding column 2 is treated with hard anodizing to form a wear-resistant protective layer, which can effectively resist the impact and wear during concrete pouring.

[0021] Vertical grooves 3 are provided on both sides of the inner cavity of the positioning hollow column 1. An annular groove 31 is provided at the bottom of the vertical groove 3. Positioning locking grooves 33 are provided on both sides of the upper end of the annular groove 31. A guide block 32 is slidably connected to the inner cavity of the positioning locking groove 33. The guide block 32 is welded to the outside of the positioning sliding column 2. A sliding disk 14 is slidably connected to the inner cavity of the positioning hollow column 1. A return spring 13 is connected between the sliding disk 14 and the positioning hollow column 1.

[0022] The vertical groove 3 and the annular groove 31 form an L-shaped motion trajectory. When the guide block 32 rotates into the positioning locking groove 33, it achieves dual axial and circumferential locking through mechanical limiting. The return spring 13 adopts a wave spring group design, which provides 150~200N preload while maintaining adjustable compression stroke to ensure adaptive support under different working conditions.

[0023] The top of the sliding plate 14 is equipped with a rubber pad with anti-slip texture. The rubber pad is made of silicone rubber and the anti-slip texture on the surface is distributed in a diamond grid pattern with a grid depth of 0.5mm. This can effectively increase the friction coefficient with the contact surface of the core mold and prevent lateral displacement caused by concrete flow.

[0024] A second flange 21 and a first flange 11 are respectively provided on the top of the positioning slide column 2 and the bottom of the positioning hollow column 1. The second flange 21 and the first flange 11 are connected to the positioning slide column 2 and the positioning hollow column 1 respectively via a connecting rod. A seated bearing connects the positioning slide column 2 and the second flange 21. The first flange 11 is equipped with 8 sets of M12 high-strength bolt connection holes. The second flange 21 has a 360° rotation scale mark, which, together with the seated bearing, enables ±5° fine adjustment. The seated bearing has a built-in PTFE composite bushing with a friction coefficient as low as 0.05, ensuring smooth rotation adjustment.

[0025] The slotted plate 12 has uniformly spaced slots on its inner side, which are adapted to the positioning pin 22. The slots are designed with an isosceles trapezoidal cross section, with a slot opening width of 8mm and a slot bottom width of 12mm. They form a wedge fit with the tapered end of the positioning pin 22. The single-sided fit clearance is controlled within the range of 0.1 to 0.2mm to achieve precise locking of axial displacement.

[0026] The guide block 32 is slidably connected to the inner cavity of the vertical groove 3, the annular groove 31 and the positioning locking groove 33. The exterior of the guide block 32 is polished and the sliding surface of the guide block 32 is coated with molybdenum disulfide solid lubricant. When the annular groove 31 turns, the frictional resistance is reduced to meet the requirements of single-person manual adjustment.

[0027] The bottom of the positioning hollow column 1 is open, and a bottom cover is threadedly connected to the bottom of the positioning hollow column 1. The bottom cover is connected to the return spring 13. The bottom cover uses an M20×1.5 fine thread connection and has a built-in wave spring washer, which can realize three-level adjustment of the preload of the return spring 13. The open design makes it easy to clean the internal concrete residue, and the whole structure does not need to be disassembled for maintenance.

[0028] This solution first connects the positioning hollow column 1 and the positioning sliding column 2 to the upper and lower molds respectively via the second flange 21 and the positioning pin 22. In use, the positioning sliding column 2 is inserted into the inner cavity of the positioning hollow column 1, and the positioning sliding column 2 is driven to rotate in the inner cavity of the positioning hollow column 1. Then, the guide block 32 is driven to rotate inside the annular groove 31 until it rotates into the inner cavity of the positioning locking groove 33. It rises due to the resistance of the sliding plate 14 and the return spring 13 and is locked inside the positioning locking groove 33. The angle of the positioning sliding column 2 is locked by the cooperation of the positioning pin 22 and the slotted plate 12, and the thin-walled core mold anti-buoyancy positioning operation is completed through secondary reinforcement.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength, thin-walled core mold anti-buoyancy positioning device, comprising: A positioning hollow column (1) and a positioning sliding column (2), wherein the positioning sliding column (2) is inserted into the inner cavity of the positioning hollow column (1), characterized in that: a slotted plate (12) is fitted on the top of the positioning hollow column (1), and a positioning pin (22) is inserted on the outside of the positioning sliding column (2). The inner cavity of the positioning hollow column (1) is provided with vertical grooves (3) on both sides. The bottom of the vertical groove (3) is provided with an annular groove (31). The upper end of the annular groove (31) is provided with positioning locking grooves (33) on both sides. The inner cavity of the positioning locking groove (33) is slidably connected with a guide block (32). The guide block (32) is welded to the outside of the positioning sliding column (2). The inner cavity of the positioning hollow column (1) is slidably connected with a sliding disk (14). A return spring (13) is connected between the sliding disk (14) and the positioning hollow column (1).

2. The high-strength thin-walled core mold anti-buoyancy positioning device according to claim 1, characterized in that: The top of the sliding disk (14) is fitted with a rubber pad, and the top of the rubber pad has anti-slip texture.

3. The high-strength thin-walled core mold anti-buoyancy positioning device according to claim 1, characterized in that: The top of the positioning slide column (2) and the bottom of the positioning hollow column (1) are respectively provided with a second flange (21) and a first flange (11). The second flange (21) and the first flange (11) are respectively connected to the positioning slide column (2) and the positioning hollow column (1) through a bearing. A seated bearing is connected between the positioning slide column (2) and the second flange (21).

4. The high-strength thin-walled core mold anti-buoyancy positioning device according to claim 1, characterized in that: The slotted plate (12) has uniformly provided slots on its inner side, and the slots are adapted to the positioning pin (22).

5. The high-strength thin-walled core mold anti-buoyancy positioning device according to claim 1, characterized in that: The guide block (32) is slidably connected to the inner cavity of the vertical groove (3), the annular groove (31) and the positioning locking groove (33), and the exterior of the guide block (32) is polished.

6. The high-strength thin-walled core mold anti-buoyancy positioning device according to claim 1, characterized in that: The bottom of the positioning hollow column (1) is designed to be open, and the bottom of the positioning hollow column (1) is threadedly connected to a bottom cover, which is connected to a return spring (13).

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