Table leg mold

Abstract

The utility model relates to dining table manufacturing technical field and disclose a kind of dining table foot base mould, including upper die group and lower die seat, the top of lower die seat is equipped with U-shaped groove, the upper die group is used to bend into U shape to the plate material being placed in U-shaped groove, the upper die group includes two expansion blocks of left and right symmetry and the transmission block for driving two expansion blocks left and right open, two The expansion block is extruded into shape with lower die seat cooperation to plate material.The dining table foot base mould provided by the utility model drives two expansion blocks dynamic movement by transmission block, the synchronous expansion characteristics of expansion block form adaptive compensation mechanism, automatically corrects interlayer misplacement problem, realizes even lateral pressure by left and right symmetrical expansion, on the one hand, the thickness of composite plate material, U-shaped opening size and curvature radius are adapted, on the other hand, effectively inhibit plate material springback deformation and local stress concentration, improve single-layer plate material forming precision and the overall strength of multilayer composite structure.

Description

Technical Field

[0001] This utility model relates to the field of dining table manufacturing technology, and in particular to a dining table leg mold. Background Technology

[0002] In the field of restaurant furniture manufacturing, the table legs, as a key component of the supporting structure, directly affect the aesthetics and durability of the product through their design and structural strength. Currently, high-end table legs on the market often employ a U-shaped cross-section design, achieved by bending and bonding multiple sheets of wood piece by piece to create a unique streamlined appearance and lightweight structure. However, traditional U-shaped bending molds face the following technical bottlenecks in actual production:

[0003] Traditional molds are mostly fixed structures, which can only press a single sheet material with a specific thickness, curvature, or U-shaped opening size. When product requirements change (such as adjusting the radius of curvature of the U-shape or the number of layers in the composite sheet), the entire mold set needs to be replaced or the modules need to be manually adjusted, resulting in long mold changeover times, high production costs, difficulty in adapting to the trend of small-batch customized production, and poor mold versatility.

[0004] Existing molds are mostly one-piece upper molds, which cannot dynamically adjust the force application point during the pressing process. This leads to uneven bending of the sheet metal, making it prone to springback deformation or localized stress concentration, affecting the finished product's accuracy and structural strength. In addition, when pressing multi-layer sheet metal composites, the lack of an adaptive compensation mechanism easily causes interlayer misalignment, requiring additional adjustments and increasing processing costs.

[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a dining table leg mold, which aims to solve the technical problem that traditional molds cannot be dynamically adjusted to adapt to the bending and composite of sheet materials.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A dining table leg mold includes an upper mold assembly and a lower mold base. The top of the lower mold base is provided with a U-shaped groove. The upper mold assembly is used to press and bend the sheet material placed in the U-shaped groove into a U-shape. The upper mold assembly includes two expansion blocks arranged symmetrically on the left and right and a transmission block for driving the two expansion blocks to open left and right. The two expansion blocks cooperate with the lower mold base to extrude and form the sheet material.

[0009] As a further improvement to the above technical solution, the cross-section of the transmission block is an isosceles triangle and is slidably connected to the two expansion blocks in an inverted manner. Each expansion block is provided with an inner inclined surface that matches the waist surface of the transmission block and an outer arc surface that matches the shape of the U-shaped groove.

[0010] As a further improvement to the above technical solution, the front and rear end faces of the transmission block are provided with a first pivot located at the midpoint, and the front and rear end faces of the expansion block are provided with a second pivot located at the midpoint. The first pivot is located above the two second pivots, and the first pivot is connected to the two second pivots respectively by a connecting rod.

[0011] As a further improvement to the above technical solution, the first pivot passes through the transmission block from front to back, and the second pivot extends from front to back.

[0012] As a further improvement to the above technical solution, the first pivot and the second pivot are provided with limiting nuts to prevent the connecting rod from disengaging.

[0013] As a further improvement to the above technical solution, a lifting ring is provided on the side of the lower mold base. The beneficial effects of this utility model are as follows: Compared with the prior art, the dining table leg mold provided by this utility model drives the two expansion blocks to move dynamically through a transmission block. The synchronous expansion characteristics of the expansion blocks form an adaptive compensation mechanism, automatically correcting interlayer misalignment problems. Uniform lateral pressure is achieved through symmetrical expansion, which on the one hand adapts to the thickness of the composite sheet, the size of the U-shaped opening, and the radius of curvature; on the other hand, it effectively suppresses sheet springback deformation and local stress concentration, improving the forming accuracy of single-layer sheets and the overall strength of multi-layer composite structures. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing the working relationship between the dining table leg mold and the cold press provided by this utility model. The arrows in the diagram indicate the direction of movement of the corresponding components.

[0015] Figure 2 A perspective view of the dining table leg mold provided by this utility model.

[0016] Figure 3 This is a schematic diagram showing the first pivot and the second pivot passing through the transmission block and the expansion block, respectively.

[0017] Explanation of main component symbols: 1-Upper module, 11-Expansion block, 12-Transmission block, 2-Lower mold base, 21-U-shaped groove, 31-First pivot, 32-Second pivot, 33-Limit nut, 34-Connecting rod, 4-Cold press, 5-Sheet metal. Detailed Implementation

[0018] This utility model provides a dining table leg mold. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0019] Please see Figures 1 to 3This utility model provides a dining table leg mold, including an upper mold assembly 1 and a lower mold base 2. The top of the lower mold base 2 is provided with a U-shaped groove 21. The upper mold assembly 1 is used to press and bend the clamping plate 5 placed in the U-shaped groove 21 into a U-shape. The upper mold assembly 1 includes two expansion blocks 11 arranged symmetrically on the left and right and a transmission block 12 for driving the two expansion blocks 11 to open left and right. The two expansion blocks 11 extrude the clamping plate 5 to form the shape.

[0020] The dining table leg mold works in conjunction with the cold press 4. The lower mold base 2 is fixed on the base of the cold press 4. First, the first piece of sheet metal 5 is placed in the U-shaped groove at the top of the lower mold base 2. The cold press 4 drives the upper mold assembly 1 to move downward. During the downward movement, the transmission block 12 pushes the left and right symmetrical expansion blocks 11 to open outward in the horizontal direction. The two expansion blocks 11 and the inner wall of the U-shaped groove work together to apply downward pressure and progressive lateral pressure to the sheet metal 5, so that the sheet metal 5 conforms to the contour of the U-shaped groove and is bent into shape.

[0021] After the first sheet 5 is formed, the second sheet 5 is directly stacked on top of the formed first sheet 5, and the above pressing process is repeated. The dynamic force application characteristics of the expansion block 11 can adaptively compensate for the thickness changes of the multi-layer sheet 5, ensuring a tight fit between the layers. This process continues until the six sheets 5 are successively bent and composited into a U-shaped whole. Through the precise cooperation between the expansion block 11 and the U-shaped groove, the integrated forming of the multi-layer composite structure is achieved.

[0022] Compared with the current technology, the dining table leg mold provided by this utility model drives the two expansion blocks 11 to move dynamically through the transmission block 12. The synchronous expansion characteristics of the expansion blocks 11 form an adaptive compensation mechanism, which automatically corrects the misalignment problem between layers. The uniform lateral pressure is achieved through left and right symmetrical expansion. On the one hand, it adapts to the thickness of the composite board 5, the size of the U-shaped opening and the radius of curvature. On the other hand, it effectively suppresses the springback deformation and local stress concentration of the board 5, and improves the forming accuracy of the single-layer board 5 and the overall strength of the multi-layer composite structure.

[0023] Specifically, the transmission block 12 has an isosceles triangular cross-section and is slidably connected to the two expansion blocks 11 in an inverted manner. Each expansion block 11 has an inner inclined surface that matches the waist surface of the transmission block 12 and an outer arc surface that matches the shape of the U-shaped groove 21. The inverted isosceles triangular cross-section design of the transmission block 12 allows it to form a stable sliding pair through the sliding contact between its waist surface and the inner inclined surface of the expansion block 11 when moving downwards, efficiently converting vertical pressure into horizontal expansion force and downward pressure force. This geometry ensures that the two expansion blocks 11 move outwards synchronously and symmetrically, avoiding distortion of the sheet 5 due to uneven force application, and further enhancing the interlayer bonding accuracy during multi-layer composite pressing.

[0024] Furthermore, the transmission block 12 has a first pivot 31 located at the midpoint on its front and rear end faces, and the expansion block 11 has a second pivot 32 located at the midpoint on its front and rear end faces. The first pivot 31 is located above the two second pivots 32, and the first pivot 31 is connected to the two second pivots 32 by connecting rods 34. When the transmission block 12 moves downward, the connecting rods 34 are pulled and rotate around the second pivots 32, pushing the expansion block 11 to expand horizontally along the direction of the U-shaped groove 21. Since the connecting rods 34 and the pivots are both located at the midpoint of the component, and the left and right structures are symmetrical, the expansion blocks 11 on both sides always maintain parallel and synchronous movement, ensuring uniform pressure on the sheet 5. When pressing multiple layers of sheet 5 together, for each layer of sheet 5 stacked, the transmission block 12 reduces its downward movement, and the connecting rods 34 drive the expansion blocks 11 to continue to expand outward by changing the rotation angle. During this process, the rotatable nature of the hinge point allows the expansion block 11 to adaptively adjust the horizontal displacement, precisely match the thickness of the newly added sheet 5, continuously bend the sheet 5 and tightly fit it with the previous layer, until the U-shaped composite molding of the six-layer sheet 5 is completed.

[0025] Preferably, the first pivot 31 passes through the transmission block 12 from front to back, and the second pivot 32 passes through the expansion block from front to back. This through-pivot design provides a more stable rotation fulcrum, significantly increasing the stress-bearing cross-section of the transmission block 12 and the expansion block 11. Compared to a non-through structure, it effectively disperses the tensile and compressive forces transmitted by the connecting rod 34, reducing stress concentration at the pivot hole edge. Especially under high-frequency pressing conditions, it significantly improves the bonding strength between the pivot and the substrate, reduces the risk of breakage or wear, and extends the service life of the core components of the mold.

[0026] The first pivot 31 and the second pivot 32 are equipped with limiting nuts 33 to prevent the connecting rod 34 from disengaging. The limiting nuts 33, through axial limiting, firmly confine the connecting rod 34 to the first pivot 31 and the second pivot 32, preventing the connecting rod 34 from loosening due to high-frequency vibration, impact, or component wear during the pressing process. Especially under high-load conditions of continuous pressing of multi-layer sheet metal 5, this ensures the integrity of the transmission system and prevents mold failure or safety accidents caused by the connecting rod 34 disengaging.

[0027] To facilitate handling, the lower mold base 2 is provided with lifting rings on its side to provide lifting support points.

[0028] Of course, in order to facilitate the lifting of the upper module 1, force-bearing ears can be provided on the front and rear end faces of the transmission block 12.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A dining table leg mold, used in conjunction with a cold press, characterized in that, It includes an upper mold assembly and a lower mold base. The top of the lower mold base is provided with a U-shaped groove. The upper mold assembly is used to press and bend the sheet material placed in the U-shaped groove into a U-shape. The upper mold assembly includes two expansion blocks arranged symmetrically on the left and right and a transmission block for driving the two expansion blocks to open left and right. The two expansion blocks cooperate with the lower mold base to extrude and form the sheet material.

2. The dining table leg mold according to claim 1, characterized in that, The cross-section of the transmission block is an isosceles triangle and is slidably connected to the two expansion blocks in an inverted manner. Each expansion block is provided with an inner inclined surface that matches the waist surface of the transmission block and an outer arc surface that matches the shape of the U-shaped groove.

3. The dining table leg mold according to claim 2, characterized in that, The transmission block has a first pivot located at the midpoint on its front and rear end faces, and the expansion block has a second pivot located at the midpoint on its front and rear end faces. The first pivot is located above the two second pivots, and the first pivot is connected to the two second pivots by connecting rods.

4. The dining table leg mold according to claim 3, characterized in that, The first pivot passes through the transmission block from front to back, and the second pivot extends from front to back.

5. The dining table leg mold according to claim 4, characterized in that, The first and second pivots are provided with limiting nuts that prevent the connecting rod from disengaging.

6. The dining table leg mold according to claim 1, characterized in that, The lower mold base is provided with a lifting ring on its side.

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