An adjustable sizing die

Abstract

This invention discloses an adjustable shaping mold, belonging to the field of shaping mold technology, comprising: a sub-mold, having multiple sets and fixedly mounted on one side of a first mounting base; and a mother mold, having multiple sets and hinged to one side of a second mounting base. The mother mold and the sub-mold can be inserted and fitted together in the horizontal direction to form a circular mold for casting and shaping concrete pre-reserved holes. The sub-mold and the mother mold are connected and limited by a snap-fit ​​component. When the sub-mold moves relative to the mother mold in the horizontal direction, it can drive the mother mold to deflect relative to the second mounting base, allowing the mother mold to detach from the inner wall of the pre-reserved hole. The sub-mold has a smaller outer circular surface curvature, significantly reducing the contact area with the inner wall of the pre-reserved hole. When moving along the axis, it can easily break the adhesive force between the two, making the demolding operation more labor-saving and convenient. As the sub-mold moves along the axis of the pre-reserved hole, the mother mold can simultaneously deflect around the hinge axis towards the center of the mold, achieving gradual and flexible detachment from the inner wall of the pre-reserved hole.

Description

Technical Field

[0001] This invention relates to the field of molding technology, and in particular to an adjustable molding mold. Background Technology

[0002] In the field of building construction, the casting of pre-reserved holes for pipes in floor slabs and walls, as well as the molding of small circular concrete components, is usually carried out using pre-cast molds.

[0003] Traditional pre-drilled hole molds are mostly integral or circumferentially assembled structures. Integral molds are cumbersome to disassemble, and demolding can easily cause damage such as bumps, chipping, and scratches to the concrete hole walls, often requiring secondary repairs. Circumferentially assembled molds usually require hammering the mold body to achieve forced demolding, which is difficult to operate in confined working spaces. Furthermore, the rigid separation of the mold body from the hole wall can easily impact the concrete forming surface, causing defects such as hole wall breakage and chipped corners.

[0004] Therefore, it is necessary to provide an adjustable shaping mold to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable shaping mold to solve the technical problems mentioned in the background art.

[0006] Based on the above ideas, the present invention provides the following technical solution: an adjustable shaping mold, comprising: Sub-molds, having multiple sets, are fixedly mounted on one side of the first mounting base; The master mold is provided in multiple sets and hinged to one side of the second mounting base. The master mold and the sub-mold can be inserted and fitted in the horizontal direction to form a circular mold for casting and shaping of pre-reserved concrete holes. The sub-mold and the mother mold are connected and limited by a snap-fit ​​assembly. When the sub-mold moves horizontally relative to the mother mold, it can cause the mother mold to deflect relative to the second mounting base, so that the mother mold can detach from the inner wall of the reserved hole.

[0007] As a further aspect of the present invention: the outer circular surface curvature of the sub-mold is smaller than the outer circular surface curvature of the mother mold.

[0008] As a further aspect of the present invention: multiple sets of pins are fixedly installed on the second mounting base, the pins pass through the first mounting base and slide with it, and a bushing is fixed at the bottom of the female mold and near the side of the sub-mold, the pins pass through the bushing and rotate with it.

[0009] As a further embodiment of the present invention: both sides of the sub-mold are set as inclined surfaces, and the mother mold has an inclined portion that contacts the inclined surface of the sub-mold and a horizontal portion that fits against the bottom of the sub-mold; The snap-fit ​​assembly is disposed between the horizontal part and the sub-mold. The snap-fit ​​assembly includes multiple sets of T-shaped snap-fit ​​blocks fixed to the bottom of the sub-mold. A snap-fit ​​groove is provided on the side of the horizontal part that fits against the sub-mold, which slides and engages with the snap-fit ​​blocks.

[0010] As a further aspect of the present invention: the horizontal portion is provided with a plurality of clearance grooves communicating with the slot, so that the card block can be moved out of the slot from the clearance groove. The bottom of the slot is provided with an elongated slot, and a protrusion is integrally formed at the bottom of the slot. The protrusion is located at the clearance groove. The bottom of the card block is fixed with a protrusion, which extends into the slot. Both sides of the protrusion and the protrusion are provided as inclined pressing portions.

[0011] As a further aspect of the present invention: a sleeve is fixed at the center of both the first mounting base and the second mounting base, and a rotating shaft is provided between the two sets of sleeves. The sleeve fixed to the second mounting base is threadedly connected to the rotating shaft, and the sleeve fixed to the first mounting base is circumferentially rotated and axially locked with the rotating shaft.

[0012] As a further aspect of the present invention: two retaining rings are fixedly sleeved on the pin shaft, and the retaining rings are located at both ends of the bushing.

[0013] As a further aspect of the present invention: the sub-mold passes through the second mounting base and slides with it. During the process of the sub-mold and the mother mold moving relative to each other along the axis of the reserved hole, the sub-mold is always in a state of sliding engagement with the second mounting base, and the pin is always in a state of sliding engagement with the first mounting base.

[0014] Compared with the prior art, the beneficial effects of this invention are: During demolding, the mother mold and the child mold can be relatively separated along the mold axis. Because the outer circular surface of the child mold has a smaller curvature, the contact area with the inner wall of the pre-drilled hole is significantly reduced, easily breaking the adhesive force between them when moving along the axis, making demolding easier and more convenient. Furthermore, as the child mold moves along the axis of the pre-drilled hole, the mother mold can simultaneously deflect around the hinge axis towards the mold center, achieving gradual and flexible separation from the inner wall of the pre-drilled hole. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the sub-mold moving horizontally relative to the parent mold according to the present invention; Figure 3 This is a schematic diagram of the threaded engagement between the rotating shaft and the sleeve of the present invention; Figure 4 This is a schematic diagram of the connection structure between the sub-mold and the mother mold of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the master mold of the present invention; Figure 6 This is a cross-sectional view of the master mold of the present invention; Figure 7 This is a schematic diagram of the card block structure of the present invention; Figure 8 This is the present invention. Figure 4 A magnified structural diagram at point A; Figure 9 This is the present invention. Figure 5 A magnified structural diagram at point B.

[0017] In the figure: 1. First mounting base; 2. Second mounting base; 3. Sleeve; 4. Female mold; 401. Bushing; 402. Inclined part; 403. Horizontal part; 4031. Clearance groove; 4032. Groove; 4033. Slot; 5. Sub-mold; 501. Inclined surface; 502. Block; 6. Pin; 7. Rotating shaft; 8. Protrusion; 9. Bud; 901. Extrusion part; 10. Retaining ring. Detailed Implementation

[0018] An adjustable shaping mold is mainly suitable for the pouring of pre-reserved holes for pipes in floor slabs and walls in building construction. It is also suitable for the shaping and pouring of small- to medium-diameter circular concrete components such as small circular / ring-shaped equipment foundations and small municipal well rings. Figures 1-9 As shown, the mold includes a sub-mold 5 and a mother mold 4 with an arc-shaped structure. The two can be spliced ​​together to form a complete circular structure, which can accurately realize the casting and molding of circular reserved holes on wall panels and floor panels.

[0019] In one embodiment, the sub-mold 5 and the mother mold 4 can be spliced ​​along the circumferential direction and fixed in shape by bolts or other connectors. After the concrete is poured, the mother mold 4 and the sub-mold 5 can be disassembled in sequence to complete the demolding. However, in actual construction, if the curvature of the sub-mold 5 or the mother mold 4 is reduced to decrease its adhesion to the inner wall of the reserved hole, it will lead to an increase in the number of mold bodies, significantly increasing the on-site assembly and disassembly procedures and reducing construction efficiency. Based on this, this solution is optimized to a structure in which the sub-mold 5 and the mother mold 4 are spliced ​​along the axial direction, combined with... Figures 1-3 As shown, the sub-mold 5 is fixedly installed on the circular first mounting base 1, and the female mold 4 is correspondingly installed on the circular second mounting base 2.

[0020] Furthermore, the curvature of the outer surface of the sub-mold 5 is smaller than that of the outer surface of the mother mold 4. The sub-mold 5 is fixedly connected to the first mounting base 1, and the mother mold 4 is hinged to the second mounting base 2. The sub-mold 5 and the mother mold 4 are connected by a snap-fit ​​assembly. This structure can form a stable rigid support on both sides of the mother mold 4, effectively improving the overall structural strength and stability of the mold. It can effectively resist the lateral pressure during the concrete pouring process, avoid problems such as mold displacement and deformation, and ensure the forming accuracy of the reserved holes.

[0021] Furthermore, during demolding, when separating the sub-mold 5 from the mother mold 4 along the mold axis, the mother mold 4 can rotate around the hinge axis to achieve flexible separation from the inner wall of the pre-drilled hole. Compared to the traditional rigid demolding method along the diameter or axis, the mother mold 4 gradually separates from the inner wall of the pre-drilled hole by rotating. This minimizes the impact and scratches on the inner wall of the pre-drilled hole during demolding, ensuring the flatness and integrity of the concrete forming surface without the need for secondary repairs. It also prevents the mold body from bending or deforming due to rigid stress, effectively protecting the mold structure and extending the service life of the mold.

[0022] In summary, this mold allows for the relative separation of the mother mold 4 and the child mold 5 along the mold axis during demolding. Because the outer surface curvature of the child mold 5 is smaller, the contact area with the inner wall of the pre-drilled hole is significantly reduced. Moving along the axis easily breaks the adhesive force between the two, making demolding easier and more convenient. Furthermore, as the child mold 5 moves along the axis of the pre-drilled hole, the mother mold 4 can simultaneously rotate around the hinge axis towards the mold center, achieving a gradual and flexible separation from the inner wall of the pre-drilled hole. This avoids the scraping and impact on the concrete forming surface caused by rigid demolding, ensuring the flatness and integrity of the inner wall of the pre-drilled hole. It also prevents deformation of the mold due to uneven stress, effectively protecting the mold structure, extending the mold's service life, and significantly improving the efficiency of on-site demolding operations.

[0023] In actual use, the sub-mold 5 is detachably connected to the first mounting base 1 via bolts, allowing for flexible adjustment of the number of sub-molds 5 to accommodate the casting requirements of pre-drilled holes of different lengths. Specifically, when the length of the pre-drilled hole is long, the number of sub-molds 5 can be increased, correspondingly increasing the number of mother molds 4. This reduces the curvature of the outer surface of a single mother mold 4, further reducing the contact area between the mother mold 4 and the inner wall of the pre-drilled hole during demolding, resulting in easier and smoother demolding later. Conversely, the number of sub-molds 5 can be reduced accordingly.

[0024] Multiple sets of pins 6 are fixedly mounted on the second mounting base 2. The pins 6 are evenly distributed in a circular array, passing through the first mounting base 1 and slidingly engaging with it. A bushing 401 is fixedly mounted on the bottom of the female mold 4 near the sub-mold 5, and the pins 6 pass through the bushing 401 and rotate with it. Figure 8As shown, two retaining rings 10 are fixedly sleeved on the pin 6, and the retaining rings 10 are respectively located at both ends of the bushing 401. Through this limiting structure, the female mold 4 can rotate stably along the axis of the pin 6. The sub-mold 5 passes through the second mounting seat 2 and slides with it. During the relative movement of the sub-mold 5 and the female mold 4 along the axis of the reserved hole, the sub-mold 5 always maintains a sliding engagement with the second mounting seat 2, and the pin 6 also always maintains a sliding engagement with the first mounting seat 1, which can effectively improve the structural stability of the sub-mold 5 and the female mold 4.

[0025] Combination Figures 3-9 As shown, to avoid structural interference between the mother mold 4 and the daughter mold 5 during the rotation of the mother mold 4 around the pin 6, this solution optimizes the structure of the daughter mold 5: The projection of the sub-mold 5 on the first mounting base 1 is an inverted trapezoidal structure, with inclined surfaces 501 on both sides; correspondingly, the mother mold 4 is equipped with an inclined part 402 that fits against the inclined surface 501 of the sub-mold 5, and a horizontal part 403 that fits against the bottom of the sub-mold 5. The snap-fit ​​component is disposed between the horizontal part 403 and the sub-mold 5 to achieve snap-fit ​​engagement between the two.

[0026] Specifically, the snap-fit ​​assembly includes multiple sets of T-shaped snap-fit ​​blocks 502 fixed to the bottom of the sub-mold 5. The horizontal portion 403 of the mother mold 4 has a snap-fit ​​groove 4033 on its mating side with the sub-mold 5, matching the snap-fit ​​blocks 502. The groove 4033 has a T-shaped cross-section, extending to both ends of the sub-mold 5. When the snap-fit ​​blocks 502 slide into the grooves 4033, they effectively limit the side of the mother mold 4 away from the pin 6, allowing the mother mold 4 and the sub-mold 5 to form a stable, rigid connection. This significantly improves the structural stability of the mold during casting, effectively resists the lateral pressure of concrete, prevents displacement or shifting of the mother mold 4 during casting, and ensures the accuracy of the pre-drilled holes.

[0027] The horizontal part 403 is also provided with multiple sets of clearance grooves 4031 that are connected to the slot 4033. The clearance grooves 4031 correspond one-to-one with the block 502, and the size of the clearance groove 4031 is larger than the size of the block 502. When demolding, the block 502 can slide along the slot 4033 to the clearance groove 4031 and move out of the slot 4033 smoothly, releasing the rotation limit on the female mold 4, allowing the female mold 4 to freely deflect around the pin 6, and achieving flexible separation from the inner wall of the reserved hole.

[0028] from Figures 8-9 As can be seen, the bottom of the card slot 4033 has an elongated slot 4032, combined with Figures 6-7As shown, a protrusion 8 is integrally formed at the bottom of the slot 4032 and at the corresponding position of the clearance slot 4031. A protrusion 9 fixed at the bottom of the locking block 502 extends into the slot 4032, and both sides of the protrusion 9 and the protrusion 8 are provided with inclined extrusion portions 901. This extrusion structure design allows the locking block 502 to slide towards the clearance slot 4031, and through the mutual pushing of the extrusion portions 901, it provides an active thrust guide for the rotation of the female mold 4, thereby causing the female mold 4 to separate from the inner wall of the reserved hole.

[0029] During actual construction, the first mounting base 1 and the second mounting base 2 are inserted through the pre-reserved openings in the formwork on both sides of the wall, and rigidly connected and fixed to the main building structure such as the floor slab steel reinforcement cage and the main wall reinforcement. This forms a reliable overall positioning, effectively resisting the lateral pressure during concrete pouring, preventing the mold from shifting, shaking, or misaligning, and ensuring the precise position and regular roundness of the pre-reserved holes. After the concrete has fully set, the fixing constraint of the first mounting base 1 is released, allowing it to move along the axis of the pre-reserved hole. Because the outer circular surface of the sub-mold 5 has a smaller curvature and a smaller contact area with the wall of the pre-reserved hole, the resistance during axial movement is lower and the separation is smoother. As the first mounting base 1 drives the sub-mold 5 to move along the axis, the locking block 502 at the bottom of the sub-mold 5 will slide synchronously along the locking groove 4033 of the mother mold 4 to the relief groove 4031. During this process, the protrusion 9 at the bottom of the locking block 502 and the protrusion 8 in the groove 4032 push and squeeze each other through the inclined extrusion parts 901 on both sides, providing an active rotational thrust for the mother mold 4, causing the mother mold 4 to naturally deflect around the pin 6 towards the center of the mold, realizing the gradual and flexible separation from the inner wall of the reserved hole. After the protrusion 9 is successfully discharged from the relief groove 4031, the limiting constraint of the locking block 502 and the locking groove 4033 is completely released, and the adhesion between the sub-mold 5 and the mother mold 4 and the inner wall of the reserved hole is also destroyed simultaneously, so that the mold as a whole can be easily moved out of the reserved hole.

[0030] Compared to traditional fixed molds, this mold adopts a modular splicing structure and a composite demolding method combining axial movement and rotational deflection, making the overall operation more labor-saving and convenient. The sub-mold 5 adopts a small arc shape, which can reduce the demolding resistance with the inner wall of the concrete; the mother mold 4 achieves flexible demolding through hinged deflection, with uniform force distribution. This not only avoids bending and deformation of the mold body due to uneven force distribution, maintaining the mold's accuracy and structural strength, but also maximizes the protection of the inner wall of the reserved hole, preventing defects such as chipped corners and scratches, resulting in a smooth and complete molding surface.

[0031] Combination Figures 1-4As shown, a sleeve 3 is fixed at the center of both the first mounting base 1 and the second mounting base 2. A rotating shaft 7 is provided between the two sets of sleeves 3. It should be noted that the sleeve 3 fixed to the second mounting base 2 is threadedly connected to the rotating shaft 7, while the sleeve 3 fixed to the first mounting base 1 is circumferentially rotated and axially locked with the rotating shaft 7. Specifically, the connection between the two can be achieved by a tapered roller bearing, or by fixing a retaining ring on the rotating shaft 7. An annular groove that mates with the retaining ring is provided on the inner wall of the sleeve 3. With this structure, during the demolding process, the operator only needs to disconnect the first mounting base 1 from the external steel reinforcement frame and rotate the rotating shaft 7. During the rotation of the rotating shaft 7, the first mounting base 1 can be moved axially by the force of the thread engagement. This structure reduces the operating space requirement, making it easier for the operator to operate and also saving more effort.

[0032] Combination Figure 3 As shown, the side of the female mold 4 away from the horizontal part 403 is in contact with the inclined surface 501 of the sub-mold 5, and the outer circular surface of the sub-mold 5 and the outer circular surface of the female mold 4 are on the same circumference, which is conducive to forming a regular reserved hole.

[0033] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this application.

Claims

1. An adjustable sizing die, characterized by, include: Sub-mold (5) is provided in multiple sets and fixed to one side of the first mounting base (1); The mother mold (4) is provided with multiple sets and hinged to one side of the second mounting base (2). The mother mold (4) and the sub-mold (5) can be inserted and fitted in the horizontal direction to form a circular mold for casting and molding of concrete reserved holes. The sub-mold (5) and the mother mold (4) are connected and limited by a snap-fit ​​assembly. When the sub-mold (5) moves relative to the mother mold (4) in the horizontal direction, it can drive the mother mold (4) to deflect relative to the second mounting base (2), so that the mother mold (4) can detach from the inner wall of the reserved hole.

2. An adjustable sizing die according to claim 1, wherein: The outer circular surface curvature of the sub-mold (5) is smaller than that of the outer circular surface curvature of the mother mold (4).

3. An adjustable sizing die according to claim 1, wherein: Multiple sets of pins (6) are fixedly installed on the second mounting base (2). The pins (6) pass through the first mounting base (1) and slide with it. A bushing (401) is fixed at the bottom of the female mold (4) and near the side of the sub-mold (5). The pins (6) pass through the bushing (401) and rotate with it.

4. An adjustable sizing die according to claim 3, wherein: Both sides of the sub-mold (5) are provided with inclined surfaces (501), and the mother mold (4) has an inclined part (402) that contacts the inclined surface (501) of the sub-mold (5) and a horizontal part (403) that fits against the bottom of the sub-mold (5). The snap-fit ​​assembly is disposed between the horizontal part (403) and the sub-mold (5). The snap-fit ​​assembly includes multiple sets of T-shaped snap-fit ​​blocks (502) fixed to the bottom of the sub-mold (5). A snap-fit ​​groove (4033) that slides with the snap-fit ​​block (502) is provided on the side of the horizontal part (403) that fits with the sub-mold (5).

5. An adjustable sizing die according to claim 4, wherein: The horizontal part (403) is provided with multiple sets of clearance grooves (4031) that communicate with the slot (4033), so that the block (502) can move out of the slot (4033) from the clearance groove (4031). The bottom of the slot (4033) is provided with an elongated slot (4032), and the bottom of the slot (4032) is integrally formed with a protrusion (8). The protrusion (8) is located at the clearance groove (4031). The bottom of the block (502) is fixed with a protrusion (9). The protrusion (9) extends into the slot (4032), and both sides of the protrusion (9) and the protrusion (8) are provided with inclined pressing parts (901).

6. An adjustable sizing die according to claim 1, wherein: A sleeve (3) is fixed at the center of both the first mounting base (1) and the second mounting base (2). A rotating shaft (7) is provided between the two sets of sleeves (3). The sleeve (3) fixed to the second mounting base (2) and the rotating shaft (7) are threaded together. The sleeve (3) fixed to the first mounting base (1) and the rotating shaft (7) rotate circumferentially and lock in axially.

7. An adjustable sizing die according to claim 3 wherein: Two retaining rings (10) are fixedly sleeved on the pin (6), and the retaining rings (10) are located at both ends of the bushing (401).

8. An adjustable sizing die according to claim 3, wherein: The sub-mold (5) passes through the second mounting base (2) and slides into it. During the process of the sub-mold (5) and the mother mold (4) moving relative to each other along the axis of the reserved hole, the sub-mold (5) is always in a state of sliding engagement with the second mounting base (2), and the pin (6) is always in a state of sliding engagement with the first mounting base (1).

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