A potting tape device and method for electronic transformers

Abstract

This application relates to the field of tape wrapping for transformers, specifically disclosing a tape wrapping device and method for electronic transformers. The device includes a body; a support base mounted on the body for fixing a workpiece; multiple cutters for cutting the tape at the bend at the top of the workpiece; a moving mechanism for driving the cutters to move; and a retraction mechanism for attaching excess tape to the top of the workpiece. This application features a method where the moving mechanism drives the cutters to cut the bend in the excess portion of the tape, and then the retraction mechanism retracts and presses down the excess portion of the tape in batches, thereby attaching the excess tape to the top of the workpiece. This results in fewer air pockets and folds after application, and higher application efficiency.

Description

Technical Field

[0001] This application relates to the field of transformer tape wrapping, and in particular to a tape wrapping device and method for electronic transformers. Background Technology

[0002] Electronic transformers generally refer to transformers that operate at medium and high frequencies and are used in electronic circuits. They are typically small in size and lightweight. The windings or the entire transformer are often partially or entirely wrapped with thin strips such as polyester tape or polyimide tape to achieve insulation, fixation, and appearance protection.

[0003] A transformer tape wrapping device typically includes: a tape supply mechanism, a tension control mechanism, a tape feeding mechanism, a workpiece fixing and wrapping mechanism, and a cutting and sealing mechanism. The workpiece fixing and wrapping mechanism usually comes in several types, such as a single-station wrapping mechanism. In this mechanism, the workpiece is placed on a support base, and a lifting mechanism above the workpiece is driven to press it down, thus fixing it in place. Then, a tape feeding mechanism on the side wall of the workpiece applies tape to one side. The support base then rotates, adhering tape to the perimeter of the workpiece. Finally, the lifting mechanism is raised to remove the workpiece.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: For some square transformers, when the tape is used to cover the transformer's perimeter wall, the width of the tape is greater than the height of the transformer's perimeter wall, meaning that the tape has a certain amount of redundancy at the top of the transformer. After the transformer's perimeter wall is completely covered with tape, the redundant tape on the transformer still needs to be manually pressed, which affects processing efficiency. Furthermore, manual pressing can easily cause air pockets, affecting processing quality. Summary of the Invention

[0005] To address the issue of excess tape being difficult to adhere to the ends of a transformer, this application provides a tape wrapping device and method for electronic transformers.

[0006] The present application provides a tape-coating device and method for electronic transformers, which adopts the following technical solution: An electronic transformer tape wrapping device, comprising: Organism; A support base is mounted on the machine body and is used to fix the workpiece. A cutter, wherein multiple cutters are provided, for cutting the tape located at the top corner of the workpiece; A moving mechanism is used to drive the cutter to move; The return mechanism is used to move the excess tape on the top of the workpiece so that it is stuck to the top of the workpiece.

[0007] Optionally, the moving mechanism includes a cylinder fixedly connected to the machine body in a vertical direction, an inner support clamp rotatably connected to the output end of the cylinder, and a mounting block fixedly connected to the clamping block of the inner support clamp, wherein the cutter is disposed on the mounting block.

[0008] Optionally, the retraction mechanism includes an extension box that slides on the cutter, a spiral spring disposed between adjacent extension boxes, and a control element for controlling the movement of the extension boxes.

[0009] Optionally, the control element is a push-pull electromagnet fixed to the cutter, the output end of the push-pull electromagnet is fixed to the extension box, and the output direction of the push-pull electromagnet points to the central axis of the workpiece.

[0010] Optionally, the spiral spring is inclined, with its height increasing as it gets closer to the center of the workpiece.

[0011] Optionally, the cutter is divided into a narrow section and a wide section from low to high, the extension box is located in the wide section, the cutter is close to the workpiece center axis on the side, the narrow section is flush with the wide section; the cutter is away from the workpiece center axis on the side, the wide section protrudes from the narrow section.

[0012] Optionally, the side wall of the support base is provided with an air nozzle connected to an air source, and the air nozzle is vertically upward.

[0013] A method for wrapping an electronic transformer with adhesive tape includes the following steps: S1. Fix the workpiece by placing it on the support base and driving the cutter to press down on the top of the workpiece through the moving mechanism. S2. Apply tape: The machine attaches the end of the tape to the side wall of the workpiece, and then the support rotates. S3, Tape Break: The machine body breaks the tape, and the moving mechanism controls all cutters to move synchronously away from the workpiece's central axis to cut off the redundant portion of the tape. S4. Apply adhesive to the top of the workpiece and control the return mechanism to return the excess tape cut off at the top of the workpiece to the top of the workpiece.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. After the workpiece is wrapped with tape, the bending points of the excess tape are cut off. Therefore, when the excess tape is pasted to the top of the workpiece, the tape is less likely to produce air bubbles or curling due to the bending points. Moreover, the entire wrapping process is more efficient than the machine plus manual processing method. 2. After the workpiece is placed on the support, the cylinder pushes the inner support fixture to descend, so that the cutter abuts against the top of the silicon steel sheet of the transformer. At this time, the workpiece is fixed by the cutter and the support. When the machine body drives the workpiece to rotate, the cutter also rotates to improve the stability of the workpiece when it is coated with glue. 3. When it is necessary to cut off the redundant part of the tape, the inner support fixture controls all the mounting blocks to move away from the workpiece axis, so that the cutter cuts the corresponding part of the tape. When the cutter needs to be reset, it is only necessary to control the inner support fixture to drive all the mounting blocks to move closer to the workpiece axis. The structure is simple and the tape cutting efficiency is high. 4. After the cutter cuts off the bends of the redundant tape, a push-pull electromagnet controls the spiral springs corresponding to one pair of redundant tape sections to move closer to the workpiece axis. Due to the spring force, during the movement of the cutter and extension box, the spiral springs unwind or rewind to maintain tension, thus smoothly pushing the tape to fold and adhere to the top of the workpiece. Once the redundant sections of one pair of tapes are adhered, the spiral springs corresponding to the redundant sections of the other pair move closer to the workpiece axis to complete the adhesion of the redundant sections of the other pair of tapes. The structure is simple and the operation is straightforward. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 This is a structural diagram used by this application group to demonstrate the support base, cutter, retraction mechanism, workpiece, and air nozzle.

[0016] Reference numerals: 1. Machine body; 12. Support base; 2. Cutting blade; 3. Moving mechanism; 31. Cylinder; 32. Inner support clamp; 33. Mounting block; 4. Retraction mechanism; 41. Extension box; 42. Vortex spring; 43. Control component; 5. Air nozzle; 6. Workpiece. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0018] Example 1 This application discloses a tape-coating device for electronic transformers. (Refer to...) Figures 1-3 The tape wrapping device for electronic transformers includes a body 1; a support base 12, which is mounted on the body 1 for fixing a workpiece 6; multiple cutters 2 for cutting the tape at the top corner of the workpiece 6. In this application, there are four cutters 2 to accommodate the most common square transformers. Specifically, when wrapping tape on the workpiece 6, the cutters 2 are positioned directly above the bend of the excess tape, i.e., above the edge of the workpiece 6; a moving mechanism 3 for driving the cutters 2 to move; and a retraction mechanism 4 for repositioning the excess tape at the top of the workpiece 6 onto the top of the workpiece 6.

[0019] Workpiece 6 is placed on support base 12, and then tape is applied to the periphery of workpiece 6. After the tape is applied, the moving mechanism 3 controls all cutters 2 to move away from the central axis of workpiece 6. At this time, the bends of the redundant tape are cut off by the cutters 2. Then, the return mechanism 4 returns the redundant tape to the top of workpiece 6, so that the redundant tape is pasted on the top of workpiece 6. Finally, the moving mechanism 3 drives the cutters 2 to reset, thus completing the tape application for one workpiece 6. In this process, since the bends of the redundant tape are cut off, when the redundant tape is pasted to the top of workpiece 6 later, the tape is less likely to have air pockets or curling edges due to the bends. Moreover, the entire tape application process is more efficient than the machine-plus-manual processing method.

[0020] Reference Figure 1 and Figure 2 The moving mechanism 3 includes a cylinder 31 fixed vertically to the machine body 1, an inner support clamp 32 rotatably connected to the output end of the cylinder 31, and a mounting block 33 fixed to the clamping block of the inner support clamp 32. The cutter 2 is threadedly connected to the mounting block 33 to facilitate the replacement of the corresponding model cutter 2 when changing the workpiece 6. The inner support clamp 32 can be mechanical or pneumatic. This application uses a pneumatic inner support clamp 32. Its principle is to use air pressure as a power source to push the wedge block inside the inner support clamp 32, thereby driving all the clamping blocks of the inner support clamp 32 to move synchronously. Its stroke corresponds to the slope of the wedge block. If the output end of the inner support clamp 32 needs to rotate, it can be connected to the air source through a rotary joint to ensure the smooth rotation of the output end of the inner support clamp 32. This is prior art. Since a strong clamping force is not required in this application, the slope of the wedge block can be set to be relatively gentle to increase the stroke of the mounting block 33.

[0021] After the workpiece 6 is placed on the support base 12, the cylinder 31 pushes the inner support clamp 32 down, causing the cutter 2 to abut against the top of the silicon steel sheet of the transformer. At this time, the workpiece 6 is fixed by the cutter 2 and the support base 12. When the machine body 1 drives the workpiece 6 to rotate, the cutter 2 also rotates to improve the stability of the workpiece 6 when it is being coated with tape. When it is necessary to cut off the excess tape, the inner support clamp 32 controls all the mounting blocks 33 to move away from the axis of the workpiece 6, so that the cutter 2 cuts the corresponding part of the tape. When the cutter 2 needs to be reset, it is only necessary to control the inner support clamp 32 to drive all the mounting blocks 33 to move closer to the axis of the workpiece 6. The structure is simple and the tape cutting efficiency is high.

[0022] Reference Figure 2 and Figure 3The return mechanism 4 includes an extension box 41 that slides on the cutter 2, a spiral spring 42 disposed between adjacent extension boxes 41, and a control element 43 for controlling the movement of the extension boxes 41. One end of the spiral spring 42 is fixed to one of the extension boxes 41, and the other end is wound inside the other extension box 41. The spiral spring 42 is inclined with its height increasing as it gets closer to the center of the workpiece 6. The spiral spring 42 and the surface of the cutter 2 can also be coated with a fluoropolymer anti-stick coating to prevent the tape from sticking firmly to the spiral spring 42 due to accidental situations. The spiral spring 42 can also be replaced by other thin strips or fine threads, but additional elastic elements are required to ensure the tension of the thin strip or fine thread, and the height of the fine thread is also difficult to perfectly match the position of the redundant part of the tape. The control component 43 is a miniature push-pull electromagnet, a miniature telescopic rod, or a combination of a small permanent magnet and a small electromagnet, which are fixed to the cutter 2. In this application, the control component 43 adopts a stable push-pull electromagnet. The output end of the push-pull electromagnet is fixed to the extension box 41. The output direction of the push-pull electromagnet points to the central axis of the workpiece 6. The circuit of the push-pull electromagnet can be tied together and connected to an external signal source through a conductive slip ring.

[0023] Two pairs of redundant tape sections on opposite sides are considered a pair. Since there are four sides in the square transformer, there are two pairs. After the cutter 2 cuts the bends of the redundant tape sections, the springs 42 corresponding to one pair of redundant tape sections are moved closer to the axis of the workpiece 6 by a push-pull electromagnet. Due to the elasticity of the springs 42, during the movement of the cutter 2 and the extension box 41, the springs 42 unwind or rewind to keep themselves taut, thus smoothly pushing the tape to fold and adhere to the top of the workpiece 6. After one pair of redundant tape sections is adhered, the springs 42 corresponding to the other pair of redundant tape sections move closer to the axis of the workpiece 6. The movement can be driven directly by the inner support clamp 32 driving the cutter 2, or by the corresponding push-pull electromagnet. If the inner support clamp 32 is used, the springs 42 that have already pushed the tape need to be retracted first. However, the overall structure and operation are simple.

[0024] Reference Figure 3 The cutter 2 is divided into a narrow section and a wide section, arranged from low to high. The extension box 41 is located in the wide section. On the side of the cutter 2 closest to the central axis of the workpiece 6, the narrow section is flush with the wide section; on the side of the cutter 2 furthest from the central axis of the workpiece 6, the wide section protrudes beyond the narrow section. The narrow section facilitates the clearance of the transformer's wiring harness; that is, when the cutter 2 abuts against the silicon steel sheet of the transformer, part of the transformer's wiring harness will protrude beyond the silicon steel sheet, while the height of the narrow section is higher than the height of the wiring harness to avoid conflict between the cutter 2 and the workpiece 6. The wide section, due to its wider installation area, facilitates the installation of the extension box 41 and the control component 43, while also avoiding insufficient rigidity due to the small overall size of the cutter 2.

[0025] Reference Figure 3The support base 12 has an air nozzle 5 connected to an air source on its side wall. The air nozzle 5 is vertically upward, and the air supply channels of the air nozzle 5 are all located inside the support base 12, and are ultimately connected to an external air source via a rotary joint. After the redundant part of the tape is cut, in order to prevent the cut redundant part of the tape from folding away from the workpiece 6, which would easily cause the folded redundant part of the tape to collide with the spiral spring 42, the air nozzle 5 blows air upward to keep the redundant part of the tape in a relatively vertical state.

[0026] The implementation principle of the tape wrapping device and method for electronic transformers in this application embodiment is as follows: the workpiece 6 is placed on the support base 12, the cylinder 31 pushes the inner support clamp 32 down, so that the cutter 2 abuts against the top of the silicon steel sheet of the transformer. At this time, the workpiece 6 is fixed by the cutter 2 and the support base 12. When the machine body 1 drives the workpiece 6 to rotate, the cutter 2 also rotates to improve the stability of the workpiece 6 when it is wrapped with tape.

[0027] Then, tape is wrapped around the periphery of workpiece 6. After the tape is wrapped around the periphery of workpiece 6, the inner support clamp 32 controls all mounting blocks 33 to move away from the axis of workpiece 6, so that the cutter 2 cuts the corresponding part of the tape. When the cutter 2 needs to be reset, it is only necessary to control the inner support clamp 32 to drive all mounting blocks 33 to move closer to the axis of workpiece 6.

[0028] Finally, a push-pull electromagnet controls the movement of one pair of coil springs 42 corresponding to the redundant sections of the tape towards the axis of the workpiece 6. Due to the elasticity of the coil springs 42, during the movement of the cutter 2 and the extension box 41, the coil springs 42 unwind or rewind accordingly to keep themselves taut, thus smoothly pushing the tape to fold and adhere to the top of the workpiece 6. After one pair of redundant sections of the tape is adhered, the other pair of coil springs 42 corresponding to the redundant sections of the tape moves towards the axis of the workpiece 6. Throughout the process, since the bends of the redundant sections of the tape are cut off, when the redundant sections of the tape are subsequently adhered to the top of the workpiece 6, the tape is less prone to bulging or curling due to the bends. Furthermore, the entire tape coating process is more efficient than a combination of machine and manual processing.

[0029] Example 2 This application discloses a method for wrapping tape for electronic transformers. Referring to the figure, the method for wrapping tape for electronic transformers includes the following steps: S1. Fix the workpiece 6 and place it on the support base 12. Drive the cutter 2 to press down on the top of the workpiece 6 through the moving mechanism 3. S2. Wrapping tape: The machine body 1 attaches the end of the tape to the side wall of the workpiece 6. The cylinder 31 drives the cutter 2 to move down and press against the workpiece 6. Then the support base 12 rotates, and the workpiece 6 also rotates synchronously to drive the tape roll to unwind and wrap the tape around the perimeter of the workpiece 6. S3, tape breakage: the machine body 1 disconnects the tape, and the moving mechanism 3 controls all cutters 2 to move synchronously away from the central axis of the workpiece 6 to cut off the redundant part of the tape. S4. Apply adhesive to the top of workpiece 6. Control the return mechanism 4 to return the excess tape cut off from the top of workpiece 6 to the top of workpiece 6. Meanwhile, cylinder 31 drives the cutter 2 to move upward as a whole, so as to remove workpiece 6 placed on support base 12.

[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tape-coating device for electronic transformers, characterized in that, include: Body (1); Support base (12), which is disposed on the machine body (1) and is used to fix the workpiece (6); Cutter (2), wherein multiple cutters (2) are provided for cutting the tape located at the top corner of the workpiece (6); The moving mechanism (3) is used to drive the cutter (2) to move; The return mechanism (4) is used to move the redundant tape on the top of the workpiece (6) to stick on the top of the workpiece (6).

2. The tape-coating device for an electronic transformer according to claim 1, characterized in that: The moving mechanism (3) includes a cylinder (31) fixedly connected to the body (1) in the vertical direction, an inner support clamp (32) rotatably connected to the output end of the cylinder (31), and a mounting block (33) fixedly connected to the clamping block of the inner support clamp (32). The cutter (2) is disposed on the mounting block (33).

3. The tape-coating device for an electronic transformer according to claim 2, characterized in that: The return mechanism (4) includes an extension box (41) that slides on the cutter (2), a spiral spring (42) disposed between adjacent extension boxes (41), and a control element (43) for controlling the movement of the extension boxes (41).

4. The tape-coating device for an electronic transformer according to claim 3, characterized in that: The control component (43) is a push-pull electromagnet fixed to the cutter (2). The output end of the push-pull electromagnet is fixed to the extension box (41), and the output direction of the push-pull electromagnet points to the central axis of the workpiece (6).

5. The tape-coating device for an electronic transformer according to claim 3, characterized in that: The spiral spring (42) is inclined so that its height increases as it gets closer to the center of the workpiece (6).

6. The tape-coating device for an electronic transformer according to claim 3, characterized in that: The cutter (2) is divided into a narrow section and a wide section from low to high. The extension box (41) is located in the wide section. The cutter (2) is close to the central axis of the workpiece (6). The narrow section is flush with the wide section. The cutter (2) is away from the central axis of the workpiece (6). The wide section protrudes from the narrow section.

7. The tape-coating device for an electronic transformer according to claim 1, characterized in that: The side wall of the support base (12) is provided with an air nozzle (5) connected to an air source, and the air nozzle (5) is vertically upward.

8. A method for wrapping tape for an electronic transformer, based on the tape wrapping device for an electronic transformer according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Fix the workpiece (6), place the workpiece (6) on the support base (12), and drive the cutter (2) to press down on the top of the workpiece (6) through the moving mechanism (3); S2, wrap tape, the machine body (1) attaches the end of the tape to the side wall of the workpiece (6), and then the support seat (12) rotates; S3, tape breakage, the machine body (1) breaks the tape, the moving mechanism (3) controls all cutters (2) to move synchronously away from the center axis of the workpiece (6) to cut off the redundant part of the tape; S4. Press the adhesive on the top of the workpiece (6) and control the pullback mechanism (4) to pull back the redundant tape cut off at the top of the workpiece (6) and stick it on the top of the workpiece (6).

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