Lap joint forming die for air-drop water bag TPU (Thermoplastic Polyurethane) composite cloth with different thicknesses
By setting an overlap height adjustment component on the mold, the problem of seamless overlap of TPU composite fabrics of different thicknesses was solved, realizing a flexible and efficient production process, reducing production costs and enhancing the connection strength of airdrop water bladders.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG TONGYI AEROSPACE SCI & TECH CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-28
AI Technical Summary
The existing airdrop water bladder overlapping molding mold requires mold replacement according to different thicknesses of TPU composite fabric, resulting in high production costs and inconvenient operation, as well as the weakness of gaps at the overlapping points.
Design a mold with an overlap height adjustment component. The mold achieves seamless and flat overlap of TPU composite fabrics of different thicknesses through the adjustment block and rotating rod. The overlap height of the side enclosure and the cover body can be adjusted by the threaded engagement and limiting structure of the adjustment block and the rotating rod to ensure a seamless connection.
Seamless and flat overlapping of TPU composite fabrics of different thicknesses has been achieved, which improves the flexibility and convenience of use, reduces production costs, and enhances the structural strength of the connection of the airdrop water bladder.
Smart Images
Figure CN224170528U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of airdrop water bladders, specifically relating to a mold for overlapping and forming TPU composite fabrics for airdrop water bladders of different thicknesses. Background Technology
[0002] Airdropped water bladders play a crucial role in providing rapid water supply during wartime operations or in response to sudden disasters. Compared to traditional water bladders, airdropped water bladders need to withstand strong impacts; otherwise, they will rupture, rendering the water supply impossible. Furthermore, in cold regions, airdropped water bladders must be protected from freezing or other disruptions to normal drinking water supply during transport and storage.
[0003] During the manufacturing process of airdrop water bladders, the base material needs to be cut into two capping pieces (round) and one side-enclosing piece (rectangular), as shown in the reference. Figure 6 The side enclosure 2 needs to be wrapped around the lower positioning plate 4 of the mold. The two ends of the side enclosure 2 overlap each other, and the upper end of the side enclosure 2 protrudes from the upper end face of the lower positioning plate 4. The protruding upper end of the side enclosure 2 is bent and flattened to the upper end face of the lower positioning plate 4 in the direction of direction 1. The cap 1 is attached to the upper end face of the side enclosure 2 in the direction of direction 2. At this time, an overlapping ring seam is formed between the outer end face of the cap 1 and the upper end face of the side enclosure 2. The upper pressure plate 6 is pressed on the upper end face of the cap 1 to clamp and fix it to the ring seam. The mold is placed in a high-frequency welding machine. Under the action of the high-frequency electromagnetic field of the high-frequency welding machine, the molecules inside the materials that are in close contact with each other collide violently to generate high-temperature fusion, thereby realizing the welding of the overlapping ring seam.
[0004] However, existing overlapping molding molds have the following technical defects: Due to the certain thickness of the TPU substrate of the side enclosure, the upper end of the side enclosure 2 is bent and flattened on the lower positioning plate 4, and there is a certain seam at the splice where it contacts and clamps the capping body 1. The splice and the capping body 1 also have gaps during the high-temperature melting process. This is the weak point of the air-dropped water bladder. It is necessary to seal the splice by welding a sealing strip through hot air forming process. Currently, to solve this technical problem, a recess is usually ground downwards on the outer end of the lower positioning plate according to the thickness of the TPU substrate, so that the overlapping part is placed in the recess. At this time, the flatness of the contact between the horizontally bent side enclosure 2 and the capping body 1 is guaranteed (no gap in the overlapping ring seam). However, for the overlapping of TPU composite fabrics of air-dropped water bladders with different thicknesses, molds with recesses of different heights are required, which results in high production costs and inconvenient operation. Utility Model Content
[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a mold for overlapping TPU composite fabrics of different thicknesses for airdrop water bladders. Without the need for repeated mold replacements, it can achieve seamless and flat overlapping of TPU composite fabrics of different thicknesses, improve the flexibility and convenience of use, and reduce production costs.
[0006] The purpose of this utility model is achieved through the following technical solution: a TPU composite fabric overlap molding mold of different thicknesses for airdrop water bladders, used to clamp and position the cover body and side enclosure body of the airdrop water bladder, including a base and a ring-shaped lower positioning plate placed on the base, a support rod between the lower positioning plate and the base, an upper pressure plate directly above the lower positioning plate, and an overlap height adjustment component at the outer end of the lower positioning plate.
[0007] The overlap height adjustment assembly includes a notch on the lower positioning plate. The bottom of the notch has a base plate that is flush with the lower end face of the lower positioning plate. A rotating rod runs through the base plate from bottom to top. An adjusting block is threaded to the upper end of the rotating rod. The adjusting block is embedded in the notch and floats up and down in the notch as the rotating rod rotates.
[0008] A further improvement of this utility model is that: the center of the base plate has a bearing seat for the rotating rod to pass through, and the bearing seat contains a bearing that contacts the rotating rod;
[0009] The outer surface of the rotating rod, which is located on the upper side of the base plate, is a threaded surface. A boss is provided at the center of the lower end face of the adjusting block, and the boss has a threaded hole that mates with the upper thread of the rotating rod.
[0010] A further improvement of this utility model is that: the left and right ends of the adjusting block have limiting ribs, and the inner wall of the notch has a limiting groove that matches the limiting ribs.
[0011] A further improvement of this utility model is that the front end face of the adjusting block is flush with the outer end face of the lower positioning plate.
[0012] A further improvement of this utility model is that the upper edge of the notch has a rounded transition surface.
[0013] A further improvement of this utility model is that the lower end of the rotating rod has a rotating handle.
[0014] A further improvement of this utility model is that: there are multiple telescopic connecting columns between the upper pressure plate and the base, and the telescopic connecting columns extend and retract to drive the upper pressure plate to rise and fall.
[0015] A further improvement of this utility model is that the outer end face of the lower positioning plate near the notch has scale lines.
[0016] This utility model has the following advantages compared with the prior art:
[0017] This invention features an overlap height adjustment component on the edge of the lower positioning plate, which eliminates the need for repeated mold replacements and enables seamless and flat overlap of TPU composite fabrics of different thicknesses. This ensures that there are no gaps at the connection point formed by the overlap of the end of the side enclosure and the end of the cover, thus guaranteeing the structural strength of the airdrop water bladder connection, improving the flexibility and convenience of use, and reducing production costs. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of a TPU composite fabric overlap molding mold for airdrop water bladders of different thicknesses in this utility model.
[0019] Figure 2 for Figure 1 A partial structural diagram.
[0020] Figure 3 for Figure 2 A schematic diagram of the structure of the overlap height adjustment component.
[0021] Figure 4 for Figure 3 A schematic diagram of the upper side of the overlap height adjustment component.
[0022] Figure 5 for Figure 3 A cross-sectional view of the overlap height adjustment component.
[0023] Figure 6 This is a schematic diagram showing the overlap between the cover and the side enclosure in this utility model.
[0024] Numbering on the map:
[0025] 1-Cap body, 2-Side enclosure body, 3-Base, 4-Lower positioning plate, 5-Support rod, 6-Upper pressure plate, 7-Overlap height adjustment component, 8-Telescopic connecting column, 9-Scale line;
[0026] 71-Notch, 72-Base plate, 73-Rotating rod, 74-Adjusting block, 75-Bearing seat, 76-Rotating handle, 77-Threaded surface, 78-Boss, 79-Threaded hole, 710-Limiting rib, 711-Limiting groove, 712-Circular transition surface. Detailed Implementation
[0027] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.
[0028] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship, such as those based on the orientation or positional relationship shown in the drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the structure or unit referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0029] In this utility model, unless otherwise explicitly specified and limited, terms such as “connection,” “provided with,” and “have” should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can be described as a mechanical connection, a direct connection, or a connection through an intermediate medium. Those skilled in the art can understand the basic meaning of the above terms in this utility model according to the specific circumstances.
[0030] A mold for overlapping and molding TPU composite fabrics of different thicknesses for airdrop water bladders, as shown in the reference. Figure 1 and Figure 2 The cap 1 and the side enclosure 2 used to clamp and position the air-dropped water bladder include a base 3 and a ring-shaped lower positioning plate 4 placed on the base 3. There is a support rod 5 between the lower positioning plate 4 and the base 3. There is an upper pressure plate 6 directly above the lower positioning plate 4. There is an overlap height adjustment component 7 at the outer end of the lower positioning plate 4.
[0031] Reference Figures 3 to 5 The overlap height adjustment assembly 7 includes a notch 71 provided on the lower positioning plate 4. The bottom of the notch 71 has a base plate 72 that is flush with the lower end face of the lower positioning plate 4. A rotating rod 73 extends from bottom to top through the base plate 72. An adjusting block 74 is threaded to the upper end of the rotating rod 73. The adjusting block 74 is embedded in the notch 71 and floats up and down in the notch 71 as the rotating rod 73 rotates.
[0032] This utility model provides an overlap height adjustment component 7 on the edge of the lower positioning plate 4, which can achieve seamless and flat overlap of TPU composite fabrics of different thicknesses without repeated mold replacement. This ensures that there are no gaps at the connection position formed by the overlap of the end of the side enclosure 2 and the end of the cover 1, thus ensuring the structural strength of the airdrop water bladder connection, improving the flexibility and convenience of use, and reducing production costs.
[0033] It should be noted that the distance between the adjusting block 74 and the upper surface of the lower positioning plate 4 is the thickness of the side enclosure 2. The height of the adjusting block 74 is finely adjusted in advance according to the thickness of the side enclosure 2 each time, so that the slope step formed by the overlapping of the ends of the side enclosure 2 is placed in the notch 71. This ensures the horizontality of the part of the side enclosure 2 that is bent on the upper surface of the lower positioning plate 4 after being enclosed and overlaps with the outer edge of the cover body 1. Then, the upper pressure plate 6 presses down with gravity to make the overlapping ring seam flat and seamless.
[0034] Based on this embodiment, the center of the base plate 72 has a bearing seat 75 through which the rotating rod 73 passes, and the bearing seat 75 contains a bearing that contacts the rotating rod 73;
[0035] The outer surface of the rotating rod 73, which is located on the upper side of the base plate 72, is a threaded surface 77. The center of the lower end face of the adjusting block 74 is provided with a boss 78, and the boss 78 has a threaded hole 79 that is threaded to the upper end of the rotating rod 73.
[0036] The rotating rod 73 is limited within the bearing seat 75 of the base plate 72, and its position in the vertical direction is restricted. When the rotating rod 73 rotates, the upper side of the rotating rod 73 is threaded into the boss 78. After the boss 78 is rotated by the rotating rod 73, its height in the vertical direction is slightly adjusted.
[0037] Based on this embodiment, the left and right ends of the adjusting block 74 have limiting ribs 710, and the inner wall of the notch 71 has a limiting groove 711 that cooperates with the limiting ribs 710.
[0038] Among them, the limiting ribs 710 on both sides of the adjusting block 74 cooperate with the limiting grooves 711 on the inner wall of the notch 71 to provide a certain circumferential limit for the adjusting block 74, that is, the adjusting block 74 can only float up and down within the notch 71, ensuring the levelness of the adjusting block 74 and further ensuring the seamless overlap.
[0039] Based on this embodiment, the front end face of the adjusting block 74 is flush with the outer end face of the lower positioning plate 4. The side enclosure 2 surrounds the outer edge of the lower positioning plate 4, and the two ends of the side enclosure 2 overlap each other near the overlap height adjustment component 7. The front end face of the adjusting block 74 is flush with the outer end face of the lower positioning plate 4, ensuring the roundness of the side enclosure 2 and further ensuring the aesthetics of the connection with the cover 1.
[0040] Based on this embodiment, the upper edge of the notch 71 has a rounded transition surface 712. The upper end of the side enclosure 2 is positioned at the upper outer edge of the lower positioning plate 4. The overlap of the side enclosure 2 is inside the notch 71. The rounded transition surface 712 plays a certain guiding role for the end of the side enclosure 2 when it passes through the notch 71, avoiding sharp corners from causing wear on the inner wall of the side enclosure 2.
[0041] Based on this embodiment, the lower end of the rotating rod 73 has a rotating handle 76, which makes it easy for the operator to hold and rotate.
[0042] Based on this embodiment, there are multiple telescopic connecting columns 8 between the upper pressure plate 6 and the base 3. The telescopic connecting columns 8 extend and retract, driving the upper pressure plate 6 to rise and fall.
[0043] It should be noted that the upper end of the telescopic connecting column 8 is in contact with the upper pressure plate 8. When the upper pressure plate 6 needs to be pressed on the lower positioning plate 4, the telescopic connecting column 8 retracts downward. The upper pressure plate 8 presses the cover body 1 and the side enclosure body 2 on the upper end face of the upper pressure plate 6 according to its own weight. After the side enclosure body 2 and the cover body 1 are welded together, the telescopic connecting column 8 is lifted upward. At the same time, the upper pressure plate 6 is manually removed, and the side enclosure body 2 and the cover body 1 can be disassembled after welding.
[0044] Based on this embodiment, the outer end face of the lower positioning disk 4 near the notch 71 has a scale line 9. Since the thickness difference of the side enclosure 2 of different thicknesses is small, the height adjustment range of the overlap height adjustment component 7 is small. In order to ensure the adjustment accuracy, the outer end face of the lower positioning disk 4 is provided with a scale line 9, and the height of the adjustment block 74 is finely adjusted in advance according to the size of the scale line.
[0045] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A mold for overlapping and molding TPU composite fabrics of different thicknesses for airdrop water bladders, used to clamp and position the cap and side enclosure of the airdrop water bladder, characterized in that: It includes a base and a ring-shaped lower positioning plate placed on the base. A support rod is provided between the lower positioning plate and the base. An upper pressure plate is provided directly above the lower positioning plate. An overlap height adjustment component is provided at the outer end of the lower positioning plate. The overlap height adjustment assembly includes a notch on the lower positioning plate. The bottom of the notch has a base plate that is flush with the lower end face of the lower positioning plate. A rotating rod runs through the base plate from bottom to top. An adjusting block is threaded to the upper end of the rotating rod. The adjusting block is embedded in the notch and floats up and down in the notch as the rotating rod rotates.
2. The mold for overlapping and forming TPU composite fabrics of different thicknesses for airdrop water bladders according to claim 1, characterized in that: The base plate has a bearing seat at its center for a rotating rod to pass through, and the bearing seat contains a bearing that contacts the rotating rod. The outer surface of the rotating rod, which is located on the upper side of the base plate, is a threaded surface. A boss is provided at the center of the lower end face of the adjusting block, and the boss has a threaded hole that is threaded to engage with the upper end of the rotating rod.
3. The mold for overlapping and forming TPU composite fabrics of different thicknesses for airdrop water bladders according to claim 2, characterized in that: The adjusting block has limiting ribs on both sides, and the inner wall of the notch has a limiting groove that matches the limiting ribs.
4. The mold for overlapping and forming TPU composite fabrics of different thicknesses for airdrop water bladders according to claim 3, characterized in that: The front end face of the adjustment block is flush with the outer end face of the lower positioning plate.
5. The mold for overlapping and forming TPU composite fabrics of different thicknesses for airdrop water bladders according to claim 4, characterized in that: The upper edge of the notch has a rounded transition surface.
6. The mold for overlapping and forming TPU composite fabrics of different thicknesses for airdrop water bladders according to claim 5, characterized in that: The lower end of the rotating rod has a rotating handle.
7. The mold for overlapping and forming TPU composite fabrics of different thicknesses for airdrop water bladders according to claim 5, characterized in that: The upper pressure plate and the base are connected by multiple telescopic connecting columns, which extend and retract to drive the upper pressure plate to move up and down.
8. The mold for overlapping and forming TPU composite fabrics of different thicknesses for airdrop water bladders according to claim 7, characterized in that: The lower positioning disk has scale lines on its outer end face near the notch.