Flexible part welding tool and high-frequency machine

Abstract

The utility model discloses a flexible part welding tool and a high-frequency machine, and relates to the technical field of soft material welding tools. The flexible part welding tool comprises a pressurizing part and a mold. The mold is arranged below the pressurizing piece; the flexible part comprises a first flexible part and a second flexible part, the first flexible part is fixed in the mold, and the second flexible part abuts against the first flexible part through the mold; during welding, the pressurizing piece abuts against the die, and a gap is formed between the bottom end of the pressurizing piece and the die. A copper plate plane in the prior art is replaced with the pressurizing piece of the strip-shaped structure, during welding, the first flexible piece folded redundantly is placed outside from the gap between the mold and the pressurizing piece, and pressurizing of the pressurizing piece is prevented from being affected.

Description

Technical Field

[0001] This application relates to the technical field of welding fixtures for soft materials, specifically to a flexible component welding fixture and a high-frequency welding machine. Background Technology

[0002] With the development of industrial technology, the demand for containers for various special purposes is increasing, especially in applications requiring high flexibility, high safety, lightweight, and space adaptability. Traditional rigid containers are not flexible enough in some applications and cannot meet the requirements. Therefore, flexible containers made of flexible materials are becoming increasingly popular. Thermoplastic polyurethane elastomer (TPU), as a high-performance material, has shown great potential in manufacturing such containers due to its excellent mechanical properties, wear resistance, oil resistance, and good processing performance. However, although TPU materials provide ideal physical properties for flexible containers, its welding process still faces challenges.

[0003] In the traditional TPU flexible container welding process, a high-frequency machine is usually used in conjunction with a mold with a specific shaped end face contour for welding. The specific steps are to place material A along the end face contour of the mold and position it on material B by the mold. In the existing technology, a copper plate is used to press the mold.

[0004] Because the copper plate is larger than the mold, there is no gap between the copper plate and the mold to connect to the outside when the copper plate is pressed into the mold. When the vertical height of material A is relatively large, material A is completely folded between the copper plate and the mold. The presence of material A causes uneven contact between the copper plate and the mold, resulting in uneven pressure distribution. The position of the copper plate needs to be adjusted multiple times to apply pressure, making it difficult to complete the processing in one go. Utility Model Content

[0005] To address at least one of the problems mentioned in the background art, this application provides a flexible welding fixture and a high-frequency welding machine. By using a strip-shaped pressure member instead of the copper plate plane in the prior art, during welding, the redundant folded material A is placed outside from the gap between the mold and the pressure member, thus avoiding affecting the pressure of the pressure member.

[0006] The specific technical solutions provided in this application are as follows:

[0007] In the first aspect, a flexible component welding fixture is provided, comprising: a pressure component and a mold;

[0008] The mold is positioned below the pressure component;

[0009] The flexible component includes a first flexible component and a second flexible component. The first flexible component is fixed inside the mold, and the second flexible component abuts against the first flexible component through the mold. During welding, the pressure component abuts against the mold, and a gap is formed between the bottom end of the pressure component and the mold.

[0010] In a further embodiment, the first flexible element is partially or entirely fixed inside the mold.

[0011] In a further embodiment, when the first flexible member is partially fixed inside the mold, the first flexible member abuts against the inner wall of the mold, the bottom end of the first flexible member is turned outward to wrap around the outer wall of the mold, and the top end of the first flexible member extends outward along the gap to the outside of the mold.

[0012] In a further embodiment, the mold includes:

[0013] The vertically elevating section has one end connected to the top surface of the mold and the other end extending close to the pressure member; during welding, the other end of the vertically elevating section abuts against the pressure member.

[0014] In a further embodiment, when the first flexible member is completely fixed inside the mold, the bottom of the first flexible member extends radially outward to form a first thickened portion.

[0015] In a further embodiment, the bottom surface of the mold extends radially outward to form a second thickened portion corresponding to the first thickened portion; the bottom surface of the mold is provided with an annular groove.

[0016] In a further embodiment, the pressure member includes a strip structure; during welding, the strip structure abuts against the top of the mold or the top of the vertically elevating portion.

[0017] In a further embodiment, the strip structure includes a first member with a groove, and at least two of the strip structures are snap-fitted together via the first member to form a pressure member.

[0018] In a further embodiment, the pressure component, the mold, and the vertical heightening part are all made of conductive materials.

[0019] Secondly, a high-frequency welding machine is provided, including the aforementioned flexible component welding fixture.

[0020] The embodiments of this application have the following beneficial effects:

[0021] This application replaces the copper plate plane in the prior art by setting a gap between the bottom of the pressure component and the inside of the mold to communicate with the outside during welding. During welding, the redundant folded material A extends from the gap between the mold and the pressure component and is placed to the outside, avoiding affecting the pressure of the pressure component, ensuring uniform contact and pressure between the pressure component and the mold, and completing the welding with one pressurization. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a pressure member according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the mold and the vertically heightening part according to an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the welding structure in one embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the structure of the mold and connector in one embodiment of this application.

[0027] Figures 1 to 4 The reference numerals in the attached drawings are as follows: 1. Pressure component; 2. Mold; 3. Vertical heightening part; 4. Joint; 5. Annular groove; 6. First thickened part; 7. Second thickened part. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Because traditional rigid containers are not flexible enough in certain applications and cannot meet the requirements, flexible components made of flexible materials are becoming increasingly popular. Flexible materials include: thermoplastic polyurethane elastomer (TPU), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), thermoplastic elastomer (TPE), styrene-butadiene-styrene block copolymer (SBS) and styrene-isoprene-styrene block copolymer (SIS), polyurethane (PU), thermoplastic vulcanizate (TPV), etc. Products made from flexible materials include, but are not limited to: fuel tanks, water tanks, blood bags, etc. This embodiment uses the fabrication of a flexible fuel tank for use in the drone industry using TPU as a raw material to illustrate this application in detail.

[0031] A flexible fuel tank is a main component of a fuel system made of flexible materials. Unlike traditional rigid fuel tanks made of metal or plastic, flexible fuel tanks achieve lightweighting, high safety, and space adaptability in drones and aircraft through the flexibility of the material. In the drone field, TPU is commonly used as the raw material for flexible fuel tanks due to its excellent comprehensive properties, including high strength, high toughness, wear resistance, oil resistance, and good machinability. Traditional TPU flexible fuel tank manufacturing typically involves welding using a high-frequency welding machine in conjunction with a mold of a specific end face contour.

[0032] When manufacturing the cylindrical flexible fuel tank, both the first flexible component (material A) and the second flexible component (material B) are made of TPU. The first flexible component forms the wall of the flexible fuel tank (cylindrical with a certain height), and the second flexible component forms the bottom of the flexible fuel tank (planar in shape). Before welding, the first flexible component is placed inside the mold along the end face contour, and the first flexible component is positioned on the second flexible component by the mold. The shape of the mold is selected based on the shape of the bottom of the finished flexible fuel tank.

[0033] Example 1

[0034] In this embodiment, a flexible component welding fixture is provided, comprising: a pressure member 1 and a mold 2. The pressure member 1 is located above the mold 2. The flexible component includes a first flexible component and a second flexible component. The first flexible component is fixed inside the mold 2, and the second flexible component abuts against the first flexible component through the mold 2. During welding, the pressure member 1 abuts against the mold 2, and a gap is formed between the bottom end of the pressure member 1 and the mold 2.

[0035] In the above solution, a gap is formed between the bottom end of the pressure component 1 and the inside of the mold 2 during welding, replacing the copper plate plane in the prior art. During welding, the redundant folded material A extends from the gap between the mold 2 and the pressure component 1 and is placed outside, avoiding affecting the pressure of the pressure component 1, ensuring uniform contact and pressure between the pressure component 1 and the mold 2, and completing the welding with one pressurization.

[0036] Furthermore, the first flexible component is partially or entirely fixed inside the mold 2.

[0037] Furthermore, when the first flexible part is fixed inside the mold 2, the first flexible part abuts against the inner wall of the mold 2, the bottom end of the first flexible part is turned outward to wrap around the outer wall of the mold 2, and the top end of the first flexible part extends outward along the gap to the outside of the mold 2.

[0038] In the above scheme, taking the fabrication of a cylindrical flexible oil tank as an example, the first flexible component is set in a cylindrical shape and placed vertically inside the mold 2. The mold 2 can be a ring structure, such as an elliptical ring structure or a polygonal ring structure. The mold 2 has a hollow part that runs through its top and bottom ends, that is, the mold 2 is hollow inside and has openings at the top and bottom ends.

[0039] The sidewall of the first flexible component abuts against the interior of mold 2. The bottom of the first flexible component is turned outward and wraps around the edge contour of the outer wall of mold 2 (the wrapping height is up to the same as the height of mold 2). The first flexible component wrapping mold 2 is then placed on the second flexible component. During welding, the pressure component 1 applies downward pressure and contacts mold 2. The top of the first flexible component extends outward along the gap of mold 2. Using the welding principle of a high-frequency welding machine, the first flexible component is welded onto the second flexible component.

[0040] More specifically, the mold 2 includes a vertically extending portion 3. One end of the vertically extending portion 3 is connected to the top surface of the mold 2 and the other end extends close to the pressure member 1; during welding, the other end of the vertically extending portion 3 abuts against the pressure member 1.

[0041] like Figure 2 As shown, Figure 2 (a) is a top view of mold 2 and vertical extension part 3. Figure 2 (b) is a side view of the mold 2 and the vertical extension section 3. The vertical extension section 3 can be configured as a vertical rod, etc., and can be installed on the top surface of the mold 2 by means of welding or other connection methods. The number and arrangement of the vertical extension sections 3 are not strictly limited and are set according to actual needs.

[0042] In the above scheme, during welding, the top of the vertically raised part 3 contacts the pressure member 1. Due to the setting of the vertically raised part 3, during welding, the pressure member 1 only needs to contact the raised part, without contacting the top surface of the mold 2. This increases the clearance space between the top surface of the mold 2 and the pressure member 1, further reducing the impact of the folded first flexible part on welding, achieving one-time welding, improving welding efficiency, and ensuring uniform and aesthetically pleasing welds.

[0043] When there are two or more vertical raising sections 3, the top height of all vertical raising sections 3 is the same, ensuring that the pressure surface is in uniform contact with the vertical raising section 3 and that the pressure is uniform.

[0044] Furthermore, when the first flexible component is completely fixed inside the mold 2, the bottom of the first flexible component extends radially outward to form a first thickened portion 6.

[0045] In welding scenarios where the first flexible component is completely fixed inside the mold 2, the first flexible component can be a connector 4 (flange), an oil nozzle, etc. Taking connector 4 as an example, the bottom of connector 4 is set to extend radially outward to form a first thickened part 6. In other words, the root of connector 4 is thickened and reinforced and rounded to prevent stress concentration at the root due to thermal expansion and contraction after injection molding.

[0046] More specifically, the bottom surface of mold 2 extends radially outward to form a second thickened portion 7 corresponding to the first thickened portion 6; the bottom surface of mold 2 is provided with an annular groove 5. Mold 2 needs to be welded to joint 4, and the bottom of mold 2 conforms to the shape of joint 4, that is, the bottom of mold 2 is provided with a second thickened portion 7 corresponding to the first thickened portion 6.

[0047] In the above scheme, such as Figure 4 As shown, Figure 4 (a) is a schematic diagram of the structure of mold 2. Figure 4 (b) is a schematic diagram of the nozzle or connector 4. When welding the nozzle or connector 4 of the flexible fuel tank, the mold 2 is adapted to the shape of the nozzle or connector 4. The nozzle or connector 4 is fitted inside the mold 2, and then the mold 2 is placed on the second flexible component. The pressure component 1 contacts the mold 2 for welding. The bottom end of the mold 2 is thickened and reinforced (i.e., a second thickened part 7 is provided) and rounded at the corners. The bottom surface of the mold 2 has at least one annular groove 5 structure to ensure the overall welding strength and sealing of the weld, preventing oil leakage from the flexible fuel tank due to weak welding at the connector 4 location.

[0048] Furthermore, the pressure component 1 includes a strip-shaped structure; during welding, the strip-shaped structure abuts against the top of the mold 2 or the top of the vertically raised part 3.

[0049] In the above solution, by setting the pressure component 1 as a strip structure instead of the copper plate plane in the prior art, the redundant folded first flexible component is placed outside the gap between the mold 2 and the pressure component 1 during welding, thus avoiding affecting the pressure of the pressure component 1. Moreover, since the pressure component 1 is set as a strip, the number of contact points with the mold 2 is reduced. As long as the contact position between the pressure component 1 and the mold 2 is not affected by the first flexible component, the contact between the pressure component 1 and the mold 2 can be ensured to be uniform, and welding can be completed in one pressurization.

[0050] Furthermore, the strip structure includes a first member with a groove, and at least two strip structures are connected by the first member to form a pressure member 1.

[0051] The number of the first component is determined based on actual needs. For example... Figure 1As shown, the number of first components is set to two. The two first components are combined through grooves to form a pressure component 1. The two components have a certain angle, such as an angle range of [30°, 150°]. Preferably, the angle is set to 90°, and the two first components are combined through grooves to form a cross shape. Using a cross-shaped pressure component 1 instead of a traditional copper plate plane can not only apply uniform pressure to the mold 2, but also provide a clearance position for the first flexible component, saving space and improving operability. Moreover, the cross-shaped pressure component 1 can be adapted to molds 2 of various shapes, reducing the problems of low efficiency and uneven welding caused by repeated disassembly and leveling of the pressure component 1 due to different shapes of molds 2.

[0052] like Figure 3 As shown, Figure 3 (a) is a top view of the pressure member 1 contacting the vertically raised part 3. Figure 3 (b) is a side view of the pressure member 1 in contact with the vertically raised part 3. The pressure member 1 is arranged in a cross shape, which makes the pressure surface evenly distributed and applies uniform pressure to the vertically raised part 3. At the same time, it provides more clearance space for the first flexible member and improves the operability of welding.

[0053] Furthermore, the pressure component 1, the mold 2, and the vertical heightening part 3 are all made of conductive materials.

[0054] Example 2

[0055] This embodiment provides a high-frequency welding machine, including a flexible component welding fixture as described in Embodiment 1. A pressure component 1 is installed in the fixture of the high-frequency welding machine, and the welding process utilizes the principle of the high-frequency welding machine.

[0056] Although preferred embodiments have been described in this application, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of this application.

[0057] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A flexible component welding fixture, characterized in that, include: Pressure component (1) and mold (2); The mold (2) is located below the pressure member (1); The flexible component includes a first flexible component and a second flexible component. The first flexible component is fixed inside the mold (2), and the second flexible component abuts against the first flexible component through the mold (2). During welding, the pressure component (1) abuts against the mold (2), and a gap is formed between the bottom end of the pressure component (1) and the mold (2).

2. A flexible member welding fixture as defined in claim 1, wherein The first flexible component is partially or entirely fixed inside the mold (2).

3. A flexible member welding fixture as defined in claim 2, wherein When the first flexible part is fixed inside the mold (2), the first flexible part abuts against the inner wall of the mold (2), the bottom end of the first flexible part is turned outward to wrap around the outer wall of the mold (2), and the top end of the first flexible part extends outward along the gap to the outside of the mold (2).

4. The flexible member welding tool according to claim 1 or 3, wherein The mold (2) includes: The vertically elevating part (3) has one end connected to the top surface of the mold (2) and the other end extending close to the pressure member (1); during welding, the other end of the vertically elevating part (3) abuts against the pressure member (1).

5. A flexible member welding fixture as defined in claim 2, wherein When the first flexible member is completely fixed inside the mold (2), the bottom of the first flexible member extends radially outward to form a first thickened part (6).

6. The flexible component welding fixture as described in claim 5, characterized in that, The bottom surface of the mold (2) extends radially outward to form a second thickened part (7) corresponding to the first thickened part (6); the bottom surface of the mold (2) is provided with an annular groove (5).

7. A flexible member welding fixture as defined in claim 4 wherein, The pressure component (1) includes a strip structure; during welding, the strip structure abuts against the top of the mold (2) or the top of the vertical raising part (3).

8. A flexible member welding fixture as defined in claim 7, wherein The strip structure includes a first member with a groove, and at least two of the strip structures are snap-fitted together through the first member to form a pressure member (1).

9. A flexible member welding fixture as defined in claim 5, wherein The pressurizing component (1), the mold (2), and the vertical heightening part (3) are all made of conductive materials.

10. A high frequency machine characterized by, Including a flexible component welding fixture as described in any one of claims 1 to 9.

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