Automatic production equipment and production method of special-shaped varistor

Abstract

The application discloses a kind of automation production equipment of special-shaped pressure-sensitive resistor, including rack and control unit, rack is sequentially provided with suction station, cutting station, forming station and braiding station along material processing flow direction;Rack is provided with and control unit electric connection's feeding conveyor, vacuum suction device, discharging guide device, stepping conveyor, pin cutting device, pin forming device, reciprocating transfer device and tape packaging device;Feeding conveyor corresponds with suction station, for carrying semi-finished product resistor tape and will semi-finished product resistor tape be transported to suction station one by one;Vacuum suction device is provided with vacuum adsorption assembly that can reciprocate along straight line.This application also provides a kind of production method of the automation production equipment of special-shaped pressure-sensitive resistor described above.This automation production equipment of special-shaped pressure-sensitive resistor can make process link continuously, improve automation degree, pin processing precision and braiding packaging quality.

Description

Technical Field

[0001] This invention relates to the field of electronic component manufacturing technology, and in particular to an automated production equipment and method for irregularly shaped varistors. Background Technology

[0002] Irregularly shaped varistors are core components in electronic circuits for overvoltage protection and surge suppression, and are widely used in consumer electronics, new energy, industrial control, and other fields. Typically, semi-finished irregularly shaped varistors with uncut leads are individually adhered at fixed intervals to a paper tape (usually release paper tape or kraft paper tape) with a micro-adhesive layer. The leads of these semi-finished varistors are then cut and bent into shape before being packaged into a carrier plastic shell and sealed by heat sealing. This completes the tape packaging process, suitable for subsequent automated surface mount technology (SMT) processing and long-term storage and transportation. The precision of lead processing and the sealing of the package directly determine the electrical performance and lifespan of the product.

[0003] The current production of irregularly shaped varistors mostly adopts a discrete, single-process operation mode. Each process—material feeding, lead cutting, forming, and packaging—is completed by independent equipment. The semi-finished products are transferred manually between processes, resulting in low production efficiency and making it easy for manual handling to cause lead deformation, product damage from impacts, and difficulty in ensuring consistency within the same batch. In the lead processing stage, existing equipment is mostly adapted to standard through-hole varistors, with poor adaptability to irregularly shaped leads. This leads to large deviations in cutting length, insufficient consistency in bending angles, and defects such as stress concentration at the lead root, cracking, and deformation, resulting in a low product yield.

[0004] In the tape and reel packaging process, existing equipment generally suffers from inaccurate filling and positioning, and unstable sealing quality: product filling often relies on manual alignment, making it difficult to accurately embed the corresponding empty space of the carrier tape and plastic shell, which easily leads to product misalignment, omissions, and incorrect filling; the heat sealing of the hot melt tape and the carrier tape and plastic shell often adopts a fixed planar pressing structure, which results in uneven distribution of pressing force and heat sealing temperature, easily leading to defects such as poor sealing, tape lifting, and heat deformation of the plastic shell, which cannot form a stable and reliable sealing protection, and easily causes the product to become damp and oxidized and the pins to rust during storage and transportation, which greatly reduces the reliability and storage life of the product.

[0005] In summary, existing production equipment for irregularly shaped varistors suffers from defects such as discontinuous process connections, low automation, insufficient pin processing precision, and unstable tape and reel packaging quality. It cannot balance production efficiency and processing quality, and is difficult to meet the needs of high-efficiency, high-quality, large-scale production. Summary of the Invention

[0006] The problem to be solved by the present invention is to provide an automated production equipment and method for irregularly shaped varistors. This automated production equipment for irregularly shaped varistors can make the process continuous, improve the degree of automation, pin processing accuracy and tape packaging quality.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: An automated production equipment for irregularly shaped varistors includes a frame and a control unit, characterized in that: the frame is provided with a material suction station, a cutting station, a forming station and a tape-making station in sequence along the material processing flow direction; the frame is provided with a feeding conveyor, a vacuum suction device, a material unloading guide device, a stepping conveyor, a lead cutting device, a lead forming device, a reciprocating transfer device and a carrier tape packaging device, which are electrically connected to the control unit; The feeding and conveying device corresponds to the suction station and is used to carry the semi-finished resistance strips and convey them one by one to the suction station. The vacuum suction device is equipped with a vacuum adsorption component that can move back and forth in a straight line. The adsorption end of the vacuum adsorption component can move back and forth between the suction station and the top of the unloading guide device to adsorb the semi-finished resistor strip and transfer it to the top of the unloading guide device. The feeding and guiding device corresponds to the feeding end of the stepping conveyor and is equipped with a flip-open strip baffle to receive the semi-finished resistance strip released by the vacuum adsorption component and guide the semi-finished resistance strip into the stepping conveyor. The discharge end of the stepping conveyor corresponds to the cutting station. The semi-finished resistance strip is conveyed to the cutting station through the stepping conveyor, and the products on the semi-finished resistance strip that arrive at the cutting station are paused one by one to wait for cutting. The reciprocating transfer device is installed above the cutting station, forming station and tape-making station. The reciprocating transfer device is equipped with a gripping component that can move horizontally back and forth, used to grip and transfer products between the cutting station, forming station and tape-making station. The pin cutting device corresponds to the cutting station and is equipped with a fixed blade and a moving blade facing each other. The clamping component clamps the last product on the end of the semi-finished resistor strip and cuts the pins of the clamped and positioned product to a fixed length. The lead forming device corresponds to the forming station and is equipped with a positioning clamping component and a forming pushing component. The product with cut leads is taken out from the semi-finished resistor strip and transferred to the forming station by a reciprocating transfer device. The lead forming device then bends and forms the product leads. The carrier tape packaging device corresponds to the taping station. The reciprocating transfer device transfers the formed product to the taping station, and the carrier tape packaging device loads the formed product into the carrier tape shell and completes the heat sealing and material collection operations.

[0008] The aforementioned control units are electrically connected to each device and control the coordinated operation of each device.

[0009] Generally, the specific structure of the above-mentioned feeding and conveying devices is existing technology, so it will not be described in detail here.

[0010] In a preferred embodiment, the vacuum suction device includes the vacuum adsorption assembly and a first cylinder capable of driving the vacuum adsorption assembly to move between the suction station and the material feeding guide device. The vacuum adsorption assembly includes an adsorption mounting base and multiple suction cups. The first cylinder is mounted on the frame, with its piston rod extending upwards towards the material feeding guide device. The adsorption mounting base is mounted on the end of the piston rod of the first cylinder, and each suction cup is mounted on the adsorption mounting base, with the adsorption direction of each suction cup facing downwards. The first cylinder drives the adsorption mounting base and its suction cups to move between the suction station and the material feeding guide device. When the suction cup is in the suction station, it is connected to a vacuum valve and a compressed air source via a pipeline, utilizing the negative pressure created by the compressed air flowing through the vacuum valve to adsorb the semi-finished resistance band. When the suction cup is above the material feeding guide device, it releases the negative pressure, causing the semi-finished resistance band to fall onto the material feeding guide device due to its own gravity.

[0011] In a preferred embodiment, the feeding and guiding device includes two tilting cylinders, a rotating shaft, and the strip baffle. The rotating shaft is rotatably mounted on the frame, and the fixed edge of the strip baffle is fixedly mounted on the rotating shaft. A rocker arm is fixedly mounted at each end of the rotating shaft. Both tilting cylinders are mounted on the frame, and the piston rods of both tilting cylinders extend toward the feeding end of the stepping conveyor. The ends of the piston rods of the two tilting cylinders are hinged to the free ends of the corresponding rocker arms. The free edge of the strip baffle has an upwardly bent portion.

[0012] Initial receiving state: The piston rod of the flipping cylinder is in the extended state, keeping the strip baffle horizontally facing upwards to receive the falling semi-finished resistor strip; the bent part of the strip baffle bends upwards to limit the semi-finished resistor strip and prevent it from slipping forward.

[0013] Feeding state: The piston rod of the tilting cylinder retracts, pulling the rocker arm to swing, driving the rotating shaft to rotate, causing the strip baffle to tilt downward around the axis, so that the semi-finished resistance strip slides smoothly into the feeding end of the stepping conveyor along the inclined plate surface.

[0014] Reset: After the material is unloaded, the piston rod of the flipping cylinder extends, pushes the rocker arm to swing, drives the rotating shaft to rotate, and causes the strip baffle to flip upward and reset to a horizontal state, waiting to receive the next semi-finished resistor strip.

[0015] In a preferred embodiment, the stepping conveyor includes a wheel frame, two pulleys, an annular belt, a side baffle, a clamping cylinder, a positioning trigger assembly, and a stepper motor capable of driving one of the pulleys to rotate. The wheel frame is movably mounted on the machine frame, the stepper motor is mounted on the wheel frame, the two pulleys are rotatably mounted on the wheel frame, and the annular belt is tensioned on the outside of the two pulleys. The annular belt has a forward section running from back to front and a return section running from front to back, with the forward section of the annular belt serving as the working surface. The side baffle is mounted on the machine frame and is positioned opposite to the forward section of the annular belt, forming a conveying channel between the side baffle and the forward section of the annular belt. The bottom of the conveying channel is provided with a support strip for supporting the semi-finished resistance strip. The clamping cylinder is mounted on the machine frame, with its piston rod extending towards the side baffle, and the end of the piston rod connected to the wheel frame. The positioning trigger assembly is mounted on the front end of the side baffle and corresponds to the cutting station.

[0016] The definitions of "front" and "back" are as follows: In the conveying direction of the semi-finished resistance strip in the conveyor channel, the side where the semi-finished resistance strip arrives first is designated as "back," and the side where it arrives last is designated as "front." After the semi-finished resistance strip falls into the conveyor channel in an upright position, the clamping cylinder pushes the wheel frame closer to the side baffle, causing the working surface of the annular belt to adhere tightly to the side of the semi-finished resistance strip. Then, the stepper motor drives the pulley to rotate, and the annular belt, through friction, propels the semi-finished resistance strip forward along the conveyor channel. When the last product on the end of the semi-finished resistance strip reaches the cutting station, the arrival trigger component sends an arrival signal to the control unit. The control unit then controls the stepper motor to pause conveying, ensuring the product stops precisely at the cutting station. The aforementioned support strip is used to support the bottom of the semi-finished resistance strip, preventing it from sagging.

[0017] In a further optimized scheme, the positioning trigger component is a proximity sensor.

[0018] In a preferred embodiment, the pin cutting device includes a fixed-blade cylinder, a moving-blade cylinder, a fixed-blade holder, a moving-blade holder, a fixed blade, and a moving blade. The fixed-blade cylinder and the moving-blade cylinder are respectively mounted on the frame. The piston rod extension direction of the fixed-blade cylinder is opposite to and on the same straight line as the piston rod extension direction of the moving-blade cylinder. The fixed-blade holder is mounted on the end of the piston rod of the fixed-blade cylinder, and the fixed blade is mounted on the fixed-blade holder. The moving-blade holder is mounted on the end of the piston rod of the moving-blade cylinder, and the moving blade is mounted on the moving-blade holder. The discharge end of the stepping conveyor is located between the fixed blade and the moving blade. The working end face of the fixed blade is a stepped positioning surface that matches the shape of the product pin, and the working end face of the moving blade is a stepped cutting blade that matches the shape of the product pin. During cutting, the fixed blade cylinder first drives the fixed blade to extend, so that the stepped positioning surface of the fixed blade abuts against the inner side of the product's pin, forming a rigid cutting reference; then the moving blade cylinder drives the moving blade to extend, and the stepped cutting edge of the moving blade cuts from the outside of the product's pin, cooperating with the fixed blade to complete the pin length cutting; after cutting is completed, the moving blade first resets, and then the fixed blade resets, waiting for the next product.

[0019] In a preferred embodiment, the reciprocating transfer device includes a transfer seat, a bearing, a central shaft, a transverse guide rail, a slide block, a vertical guide rail, a connecting rod, a transfer motor, and the clamping assembly. The transfer seat is movably mounted on the frame and has an inverted U-shaped guide groove. The bearing is located in the inverted U-shaped guide groove and moves back and forth along it. The central shaft is mounted on the bearing and extends forward and backward. The transverse guide rail is mounted on the transfer seat and is located below the inverted U-shaped guide groove. A movable first slider is provided on the transverse guide rail, a slide block is mounted on the first slider, and a second slider is provided on the slide block. The vertical guide rail is slidably mounted on the second slider and can move up and down along it. The vertical guide rail is connected to the central shaft at its upper end, and the connecting rod is also connected to the central shaft. A transfer motor is mounted on the transfer seat and drives the connecting rod to rotate. The clamping assembly includes a lifting seat and two mechanical claws. The lifting seat is mounted on the second slider, and both mechanical claws are mounted on the lifting seat with their clamping ends facing downwards. The inverted U-shaped guide groove has a first lowest point and a second lowest point at both ends. When the lifting seat is at the first lowest point, the clamping ends of the two mechanical claws correspond to the cutting station and the forming station, respectively. When the lifting seat is at the second lowest point, the clamping ends of the two mechanical claws correspond to the forming station and the tape-making station, respectively.

[0020] The transfer motor is started, and the rotation of the connecting rod drives the central shaft to move along the inverted U-shaped guide groove. The two ends of the inverted U-shaped guide groove are the lowest points, and the middle is the high section. When the central shaft moves to the two lowest points, the vertical guide rail moves downward and the mechanical claw descends to pick up / place the product. When the central shaft moves to the middle high position, the vertical guide rail moves upward and the mechanical claw lifts up to detach from the product. In conjunction with the horizontal sliding of the slide, the transfer between workstations is completed, realizing the automated, efficient and precise transfer of products between the cutting station, forming station and tape-making station.

[0021] In a further preferred embodiment, the positioning and clamping assembly includes a positioning guide rail, two positioning sliders, two positioning clamps, and two positioning cylinders. The positioning guide rail is mounted on the frame. Both positioning sliders are slidably mounted on the positioning guide rail and can move along it. The two positioning clamps are respectively mounted on their respective positioning sliders, and each positioning clamp has a positioning groove on its inner edge for positioning product pins. Both positioning cylinders are mounted on the frame, and their piston rods extend in opposite directions and are on the same straight line. The ends of the piston rods of the two positioning cylinders respectively engage with their respective positioning sliders. The molding and pushing assembly includes a molding guide rail, two molding sliders, two molding blocks, and two molding cylinders. The molding guide rail is mounted on the frame and perpendicular to the positioning guide rail. Both molding sliders are slidably mounted on the molding guide rail and can move along it. The two molding blocks are respectively mounted on their respective molding sliders and are located below and outside the two positioning clamps. Both molding cylinders are mounted on the frame, with their piston rods extending in opposite directions and aligned on the same straight line. The ends of the piston rods of the two molding cylinders are respectively connected to their respective molding sliders. The inner edges of both positioning clamps are provided with positioning grooves for positioning product pins. These positioning grooves are grooved according to the spacing of the product pins and are used to support and position the product pins.

[0022] Two positioning cylinders drive two opposing positioning sliders, which hold the product's pins at specific positions, thus limiting their movement. Two forming cylinders then drive two opposing forming sliders. The forming blocks are positioned lower than the positioning clamps, creating a vertical gap between them. This gap allows the forming blocks to push against the product pins clamped by the clamps at specific positions, completing the bending and forming process. After bending, the two positioning cylinders drive the two positioning sliders to move in opposite directions, separating them and allowing the product to be removed.

[0023] In a preferred embodiment, the carrier tape packaging device includes an upper tape unwinding mechanism, a plastic shell unwinding mechanism, a heat sealing mechanism, and a carrier tape winding mechanism. The plastic shell unwinding mechanism, heat sealing mechanism, and carrier tape winding mechanism are sequentially arranged on the frame along the product processing flow direction, with the upper tape unwinding mechanism positioned above the plastic shell unwinding mechanism. A roll of hot-melt upper tape is mounted on the upper tape unwinding mechanism, and a roll of carrier tape with a plastic shell is mounted on the plastic shell unwinding mechanism. The free ends of the hot-melt upper tape and the carrier tape with the plastic shell are connected to the carrier tape winding mechanism. A reciprocating transfer device drops the formed product into the corresponding empty space in the carrier tape with the plastic shell. The heat sealing mechanism heats and melts the hot-melt upper tape and the carrier tape with the plastic shell, bonding them together. After natural cooling and solidification, a tight seal is formed. The sealed carrier tape is then wound and collected by the carrier tape winding mechanism, completing the product packaging process.

[0024] In a further preferred embodiment, the heat-sealing mechanism includes two sealing cylinders, two heating seats, and two heating heads. Both sealing cylinders are mounted on the frame, with their piston rods pointing downwards. The two heating seats are respectively mounted on the ends of the piston rods of their respective sealing cylinders, and the two heating heads are respectively mounted on their respective heating seats, positioned directly above the sealing edges on both sides of the carrier tape. During sealing, the piston rods of both sealing cylinders extend downwards simultaneously, causing the two heating heads to press down onto the sealing edges on both sides of the carrier tape, pressing the hot-melt upper tape onto the surface of the carrier tape's plastic shell. The heat from the heating heads melts the adhesive layer of the hot-melt upper tape, fusing it with the top surface of the carrier tape's plastic shell. After a short pressure holding period, the piston rods of the sealing cylinders retract upwards, the heating heads rise and detach from the carrier tape, and the carrier tape is conveyed to the next station. The welded area naturally cools and solidifies to form a seal.

[0025] The aforementioned unwinding mechanism, plastic shell unwinding mechanism, and carrier tape winding mechanism are all existing technologies, and therefore will not be described in detail here.

[0026] This invention also provides a production method for an automated production equipment for the above-mentioned irregular-shaped varistors, characterized by comprising the following steps: (1) Feeding and conveying: The semi-finished resistance strips with the product attached are neatly stacked on the feeding and conveying device. The semi-finished resistance strips are conveyed one by one to the suction station through the feeding and conveying device, so that the semi-finished resistance strips correspond to the material picking position of the vacuum adsorption component. (2) Vacuum adsorption transfer feeding: The vacuum adsorption component moves to the suction station, adsorbs a single semi-finished resistor strip, and transports the semi-finished resistor strip to the top of the feeding guide device by moving, and breaks the vacuum to release the semi-finished resistor strip so that it falls naturally. (3) Feeding and guiding: The strip baffle of the feeding and guiding device receives the falling semi-finished resistance strip, and then rotates around the shaft to open, smoothly guiding the semi-finished resistance strip into the stepping conveyor, which then drives the semi-finished resistance strip to the cutting station. (4) The cutting station pauses the conveying and waits for cutting: When the semi-finished resistor strip is conveyed to the cutting station, the stepping conveyor pauses the conveying of each product on the semi-finished resistor strip and waits for cutting. (5) Pin length cutting: The clamping component of the reciprocating transfer device moves to the top of the cutting station and clamps the last product on the end of the semi-finished resistor strip. First, the fixed blade is driven to extend and abut against the positioning side of the product pin, and then the moving blade is driven to extend quickly and cooperate with the fixed blade to complete the pin length cutting. After the cutting is completed, the moving blade and the fixed blade are reset in sequence. (6) Pressure-holding pin forming: The product with the pins cut is taken out from the semi-finished resistor strip and transferred to the forming station by the reciprocating transfer device. First, the positioning clamping component is driven to clamp the product and press against the pin bending reference surface. Then, the forming pushing component is driven to extend and push the pin end to bend to the preset angle. After bending into place, the preset pressure holding time is maintained. Then the forming pushing component and the positioning clamping component are reset in sequence. (7) Tape and reel packaging and receiving: The formed product is transferred to the tape and reel station by the reciprocating transfer device, the component is clamped and the product is released, and the product is loaded into the empty space of the carrier tape plastic shell; the hot melt tape is hot-pressed and sealed on the surface of the carrier tape plastic shell by the carrier tape packaging device, and the packaged carrier tape is wound up and stored.

[0027] Compared with the prior art, the present invention has the following advantages: (1) This invention integrates the entire process of feeding, pin cutting, bending and forming, and tape packaging into one device. The control unit manages the coordinated operation of each device, completely replacing the traditional multi-device separate operation mode. It eliminates the manual transfer link between processes, effectively avoids pin deformation and body collision damage caused by manual operation, and ensures the consistency of product appearance and performance. Each station is arranged in an orderly manner along the product flow direction, the process is connected without interruption, the production rhythm is compact and controllable, the unit capacity is significantly improved, and the labor cost is greatly reduced.

[0028] (2) The pin cutting of the present invention adopts a step-by-step design of fixed blade positioning reference and moving blade cutting, which forms a rigid cutting support for irregular pins, fundamentally avoiding the problems of pin skew and large length deviation caused by single blade cutting, and greatly improving the consistency of cutting length; the pin forming adopts a step-by-step architecture of positioning clamping fixed reference and forming pushing to perform bending, first accurately fixing the pin position and then performing bending, which can accurately control the bending angle and forming position, effectively avoiding defects such as stress concentration, cracking and deformation at the root of the pin, significantly improving the forming accuracy and consistency of products in the same batch, and greatly reducing the defect rate.

[0029] (3) The reciprocating transfer device of the present invention can realize the precise transfer of products between the cutting, forming and tape-making stations, and accurately embed the formed products into the corresponding empty space of the carrier plastic shell, effectively avoiding the problems of product offset, missing or incorrect installation.

[0030] (4) The present invention uses a vacuum adsorption component to pick up materials, without rigid clamping or vibration alignment throughout the process, thus avoiding pin deformation and body wear from the source and ensuring the integrity of the semi-finished material. The feeding guide device uses a flip-type strip baffle to receive and guide the semi-finished resistor strip to slide smoothly into the conveying channel, avoiding product damage and jamming caused by falling impact. The entire transfer structure operates smoothly, with a low equipment failure rate and strong long-term operational stability.

[0031] (5) The workstations of the present invention are arranged linearly along the product flow direction, and the overall structure is compact, effectively saving equipment space. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the middle pin cutting device; Figure 3 yes Figure 1 Schematic diagram of the middle pin forming device; Figure 4 yes Figure 1 Schematic diagram of the reciprocating transfer device; Figure 5 This is a schematic diagram of the carrier tape packaging device in an embodiment of the present invention. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-5 As shown, the automated production equipment for irregularly shaped varistors in this embodiment includes a frame 1 and a control unit. The frame 1 is provided with a material suction station 11, a cutting station 12, a forming station 13 and a tape-making station 14 in sequence along the material processing flow direction. The frame 1 is provided with a feeding conveyor 2, a vacuum suction device 3, a material unloading guide device 4, a stepping conveyor 5, a lead cutting device 6, a lead forming device 7, a reciprocating transfer device 8 and a carrier tape packaging device 9, which are electrically connected to the control unit. The feeding and conveying device 2 corresponds to the suction station 11 and is used to carry the semi-finished resistance strips and convey the semi-finished resistance strips one by one to the suction station 11. The vacuum suction device 3 is equipped with a vacuum adsorption component 31 that can move back and forth in a straight line. The adsorption end of the vacuum adsorption component 31 can move back and forth between the suction station 11 and the material feeding guide device 4 to adsorb the semi-finished resistor strip and transport it to the top of the material feeding guide device 4. The feeding and guiding device 4 corresponds to the feeding end of the stepping conveyor 5 and is equipped with a flip-open strip baffle 41, which is used to receive the semi-finished resistance strip released by the vacuum adsorption component 31 and guide the semi-finished resistance strip into the stepping conveyor 5. The discharge end of the stepping conveyor 5 corresponds to the cutting station 12. The stepping conveyor 5 conveys the semi-finished resistance strip to the cutting station 12, and pauses the conveying of each product on the semi-finished resistance strip that arrives at the cutting station 12, waiting for cutting. The reciprocating transfer device 8 is positioned above the cutting station 12, the forming station 13 and the tape-making station 14. The reciprocating transfer device 8 is equipped with a gripping component 81 that can move horizontally back and forth, used to grip and transfer products between the cutting station 12, the forming station 13 and the tape-making station 14. The pin cutting device 6 corresponds to the cutting station 12 and is equipped with a fixed blade 65 and a moving blade 66 arranged opposite to each other. The clamping component 81 clamps the last product on the end of the semi-finished resistor strip and performs fixed-length cutting on the pins of the clamped and positioned product. The lead forming device 7 corresponds to the forming station 13 and is equipped with a positioning clamping component 71 and a forming pushing component 72. The product after the lead cutting is completed is taken out from the semi-finished resistor strip and transferred to the forming station 13 by the reciprocating transfer device 8. The lead forming device 7 bends and forms the product lead. The carrier tape packaging device 9 corresponds to the tape feeding station 14. The reciprocating transfer device 8 transfers the formed product to the tape feeding station 14. The carrier tape packaging device 9 then loads the formed product into the carrier tape plastic shell and completes the heat sealing and material collection operations.

[0035] The aforementioned control units are electrically connected to each device and control the coordinated operation of each device.

[0036] Generally, the specific structure of the above-mentioned feeding and conveying device 2 is existing technology, so it will not be described in detail here.

[0037] The vacuum suction device 3 includes the vacuum adsorption assembly 31 and a first cylinder 32 capable of driving the vacuum adsorption assembly 31 to move between the suction station 11 and the material feeding guide device 4. The vacuum adsorption assembly 31 includes an adsorption mounting base 311 and multiple suction cups 312. The first cylinder 32 is mounted on the frame 1, with its piston rod extending upwards towards the material feeding guide device 4. The adsorption mounting base 311 is mounted on the end of the piston rod of the first cylinder 32, and each suction cup 312 is mounted on the adsorption mounting base 311, with the adsorption direction of each suction cup 312 facing downwards. The first cylinder 32 drives the adsorption mounting base 311 and the suction cups 312 on it to move between the suction station 11 and the material feeding guide device 4. When the suction cup 312 is in the suction station 11, the suction cup 312 is connected to a vacuum valve and a compressed air source through a pipeline, and the negative pressure formed by the compressed air flowing through the vacuum valve is used to adsorb the semi-finished resistance band. When the suction cup 312 is above the feeding guide device 4, the suction cup 312 releases negative pressure, causing the semi-finished resistor strip to fall onto the feeding guide device 4 due to its own gravity.

[0038] The feeding and guiding device 4 includes two tilting cylinders 42, a rotating shaft 43, and the strip baffle 41. The rotating shaft 43 is rotatably mounted on the frame 1. The fixed edge of the strip baffle 41 is fixedly mounted on the rotating shaft 43. A rocker arm 44 is fixedly mounted at each end of the rotating shaft 43. Both tilting cylinders 42 are mounted on the frame 1. The piston rods of both tilting cylinders 42 extend toward the feeding end of the stepping conveyor 5. The ends of the piston rods of the two tilting cylinders 42 are hinged to the free ends of the corresponding rocker arms 44. The free edge of the strip baffle 41 is provided with an upwardly bent portion 411.

[0039] Initial receiving state: The piston rod of the flipping cylinder 42 is in the extended state, so that the strip baffle 41 is kept horizontally facing upward and is used to receive the falling semi-finished resistor strip; the bent part 411 of the strip baffle 41 bends upward, which can limit the semi-finished resistor strip and prevent the semi-finished resistor strip from slipping forward.

[0040] Feeding state: The piston rod of the tilting cylinder 42 retracts, pulling the rocker arm 44 to swing, driving the rotating shaft 43 to rotate, causing the strip baffle 41 to tilt downward around the axis, so that the semi-finished resistance strip slides smoothly into the feeding end of the stepping conveyor 5 along the inclined plate surface.

[0041] Reset: After the material is unloaded, the piston rod of the flipping cylinder 42 extends, pushes the rocker arm 44 to swing, drives the rotating shaft 43 to rotate, and makes the strip baffle 41 flip upward and reset to a horizontal state, waiting to receive the next semi-finished resistor strip.

[0042] The stepping conveyor 5 includes a wheel frame 51, two pulleys 52, an annular belt 53, a side baffle 54, a clamping cylinder 55, a positioning trigger assembly 56, and a stepper motor (not shown) capable of driving one of the pulleys 52 to rotate. The wheel frame 51 is movably mounted on the frame 1, the stepper motor is mounted on the wheel frame 51, the two pulleys 52 are rotatably mounted on the wheel frame 51, and the annular belt 53 is tensioned on the outside of the two pulleys 52. The annular belt 53 has a forward section 531 that runs from back to front and a return section 532 that runs from front to back. 531 is the working surface; the side baffle 54 is installed on the frame 1, and the side baffle 54 is arranged opposite to the forward section 531 of the annular belt 53, forming a conveying channel 541 between the side baffle 54 and the forward section 531 of the annular belt 53; the bottom of the conveying channel 541 is provided with a support strip 542 for supporting the semi-finished resistor strip; the clamping cylinder 55 is installed on the frame 1, and the piston rod of the clamping cylinder 55 extends toward the position of the side baffle 54, and the end of the piston rod of the clamping cylinder 55 is connected to the wheel frame 51; the position triggering component 56 is installed on the front end of the side baffle 54 and corresponds to the cutting station 12.

[0043] The definitions of "before" and "after" are as follows: In the conveying direction of the semi-finished resistance strip in the conveying channel 541, the side where the semi-finished resistance strip arrives first is designated as "after," and the side where it arrives last is designated as "before." After the semi-finished resistance strip falls into the conveying channel 541 in an upright position, the clamping cylinder 55 pushes the wheel frame 51 closer to the side baffle 54, causing the working surface of the annular belt 53 to adhere tightly to the side of the semi-finished resistance strip. Then, the stepper motor drives the pulley 52 to rotate, and the annular belt 53, through friction, propels the semi-finished resistance strip forward along the conveying channel 541. When the last product on the end of the semi-finished resistance strip reaches the cutting station 12, the arrival trigger component 56 sends an arrival signal to the control unit. The control unit then controls the stepper motor to pause conveying, ensuring the product stops precisely at the cutting station 12. The aforementioned support strip 542 is used to support the bottom of the semi-finished resistance strip, preventing it from sagging. The arrival trigger component 56 is a proximity sensor.

[0044] The pin cutting device 6 includes a fixed blade cylinder 61, a moving blade cylinder 62, a fixed blade holder 63, a moving blade holder 64, a fixed blade 65, and a moving blade 66. The fixed blade cylinder 61 and the moving blade cylinder 62 are respectively mounted on the frame 1. The piston rod extension direction of the fixed blade cylinder 61 is opposite to the piston rod extension direction of the moving blade cylinder 62 and is on the same straight line. The fixed blade holder 63 is mounted on the end of the piston rod of the fixed blade cylinder 61. The fixed blade 65 is mounted on the fixed blade holder 63. The moving blade holder 64 is mounted on the end of the piston rod of the moving blade cylinder 62. The moving blade 66 is mounted on the moving blade holder 64. The discharge end of the stepping conveyor 5 is located between the fixed blade 65 and the moving blade 66. The working end face of the fixed blade 65 is a stepped positioning surface 651 that matches the shape of the product pin. The working end face of the moving blade 66 is a stepped cutting blade 661 that matches the shape of the product pin. During cutting, the fixed blade cylinder 61 first drives the fixed blade 65 to extend, so that the stepped positioning surface 651 of the fixed blade 65 abuts against the inner side of the product's pin, forming a rigid cutting reference; then the moving blade cylinder 62 drives the moving blade 66 to extend, and the stepped cutting blade 661 of the moving blade 66 cuts from the outside of the product's pin, cooperating with the fixed blade 65 to complete the pin fixed length cutting; after the cutting is completed, the moving blade 66 first resets, and then the fixed blade 65 resets, waiting for the next product.

[0045] The reciprocating transfer device 8 includes a transfer seat 82, a bearing 83, a central shaft 84, a transverse guide rail 85, a slide block 86, a vertical guide rail 87, a connecting rod 88, a transfer motor 89, and the clamping assembly 81. The transfer seat 82 is movably mounted on the frame 1. The transfer seat 82 is provided with an inverted U-shaped guide groove 821. The bearing 83 is located in the inverted U-shaped guide groove 821 and moves back and forth along the inverted U-shaped guide groove 821. The central shaft 84 is set on the bearing 83 and extends back and forth. The transverse guide rail 85 is mounted on the transfer seat 82 and is located below the inverted U-shaped guide groove 821. The transverse guide rail 85 is provided with a movable first slider 851. The slide block 86 is mounted on the first slider 851. The slide block 86 is provided with a second slider 861. The vertical guide rail 87 is slidably mounted on the second slider 861 and can move up and down along the second slider 861. The upper end of 87 is connected to the central shaft 84, and the connecting rod 88 is connected to the central shaft 84. The transfer motor 89 is installed on the transfer seat 82 and drives the connecting rod 88 to rotate. The clamping assembly 81 includes a lifting seat 811 and two mechanical claws 812. The lifting seat 811 is installed on the second slider 862, and the two mechanical claws 812 are both installed on the lifting seat 811, with the clamping ends of the two mechanical claws 812 facing downwards. The two ends of the inverted U-shaped guide groove 821 have a first lowest point 8211 and a second lowest point 8212. When the lifting seat 811 is at the first lowest point 8211, the clamping ends of the two mechanical claws 812 correspond to the cutting station 12 and the forming station 13, respectively. When the lifting seat 811 is at the second lowest point 8212, the clamping ends of the two mechanical claws 812 correspond to the forming station 13 and the tape-making station 14, respectively.

[0046] The transfer motor 89 is started, and the rotation of the connecting rod 88 drives the central shaft 84 to move along the inverted U-shaped guide groove 821. The two ends of the inverted U-shaped guide groove 821 are the lowest points and the middle is the high section. When the central shaft 84 moves to the two lowest points, the vertical guide rail 87 moves downward and the mechanical claw 812 descends to pick up / place the product. When the central shaft 84 moves to the middle high position, the vertical guide rail 87 moves upward and the mechanical claw 812 lifts up to detach from the product. In conjunction with the horizontal sliding of the slide block 86, the transfer between workstations is completed, realizing the automated, efficient and precise transfer of the product between the cutting workstation 12, the forming workstation 13 and the tape feeding workstation 14.

[0047] The positioning and clamping assembly 71 includes a positioning guide rail 711, two positioning sliders 712, two positioning clamps 713, and two positioning cylinders 714. The positioning guide rail 711 is mounted on the frame 1. The two positioning sliders 712 are slidably mounted on the positioning guide rail 711 and can move along the positioning guide rail 711. The two positioning clamps 713 are respectively mounted on the corresponding positioning sliders 712. The inner edges of the two positioning clamps 713 are provided with positioning grooves 7131 that can position the product pins. The two positioning cylinders 714 are both mounted on the frame 1. The piston rods of the two positioning cylinders 714 extend in opposite directions and are on the same straight line. The ends of the piston rods of the two positioning cylinders 714 are respectively connected to the corresponding positioning sliders 712. The molding and extrusion assembly 72 includes a molding guide rail 721, two molding sliders 722, two molding blocks 723, and two molding cylinders (not shown in the figure). The molding guide rail 721 is mounted on the frame 1 and perpendicular to the positioning guide rail 711. Both molding sliders 722 are slidably mounted on the molding guide rail 721 and can move along the molding guide rail 721. The two molding blocks 723 are respectively mounted on the corresponding molding sliders 722, and the two molding blocks 723 are located below and outside the two positioning clamps 713. Both molding cylinders are mounted on the frame 1, and the piston rods of the two molding cylinders extend in opposite directions and are on the same straight line. The ends of the piston rods of the two molding cylinders are respectively connected to the corresponding molding sliders 722. The inner edges of the two positioning clamps 713 are provided with positioning grooves 7131 for positioning product pins. The positioning grooves 7131 are grooved according to the spacing of the product pins and are used to support and position the product pins.

[0048] Two positioning cylinders 714 drive two opposing positioning sliders 712, which can hold the product pins at a specific position, thus limiting the pin placement. Two forming cylinders then drive two opposing forming sliders 722. The two forming blocks 723 are positioned lower than the two positioning clamps 713, creating a vertical gap between them. This gap allows the forming blocks 723 to push against the product pins clamped by the clamps 713 at a specific position, completing the bending and forming of the product pins. After bending and forming, the two positioning cylinders 714 drive the two positioning sliders 712 to move and separate, allowing the product to be removed.

[0049] The carrier tape packaging device 9 includes an upper tape unwinding mechanism 91, a plastic shell unwinding mechanism 92, a heat sealing mechanism 93, and a carrier tape winding mechanism 94. The plastic shell unwinding mechanism 92, the heat sealing mechanism 93, and the carrier tape winding mechanism 94 are sequentially arranged on the frame 1 along the product processing flow direction, with the upper tape unwinding mechanism 91 positioned above the plastic shell unwinding mechanism 92. A roll of hot-melt upper tape is installed on the upper tape unwinding mechanism 91, and a roll of carrier tape with a plastic shell is installed on the plastic shell unwinding mechanism 92. The free ends of the hot-melt upper tape and the carrier tape with the plastic shell are connected to the carrier tape winding mechanism 94. The reciprocating transfer device 8 drops the formed product into the corresponding empty space in the carrier tape with the plastic shell. The heat sealing mechanism 93 heats and melts the hot-melt upper tape and the carrier tape with the plastic shell, and after natural cooling and solidification, a tight seal is formed. The sealed carrier tape is then wound and collected by the carrier tape winding mechanism 94, completing the product packaging process.

[0050] The heat sealing mechanism 93 includes two sealing cylinders 931, two heating seats 932, and two heating heads 933. The two sealing cylinders 931 are mounted on the frame 1, with the piston rods of the two sealing cylinders 931 facing downwards. The two heating seats 932 are respectively mounted on the piston rod ends of the corresponding sealing cylinders 931, and the two heating heads 933 are respectively mounted on the corresponding heating seats 932, with the two heating heads 933 corresponding to the two sides of the sealing edge of the carrier tape directly above. During sealing, the piston rods of the two sealing cylinders 931 extend downwards simultaneously, causing the two heating heads 933 to press down onto the sealing edges on both sides of the carrier tape, pressing the hot melt upper tape onto the surface of the carrier tape's plastic shell. The heat from the heating heads 933 melts the adhesive layer of the hot melt upper tape, fusing it with the top surface of the carrier tape's plastic shell. After a short period of pressure holding, the piston rods of the sealing cylinders 931 retract upwards, the heating heads 933 rise and detach from the carrier tape, and the carrier tape is stepped and conveyed to the next station. The welded joint naturally cools and solidifies to form a seal.

[0051] The above-mentioned unwinding mechanism 91, plastic shell unwinding mechanism 92, and carrier tape winding mechanism 94 are all existing technologies, so they will not be described in detail here.

[0052] This invention also provides a production method for an automated production equipment for the above-mentioned irregular-shaped varistors, comprising the following steps: (1) Feeding and conveying: The semi-finished resistance strips with the product attached are neatly stacked on the feeding and conveying device 2. The semi-finished resistance strips are conveyed one by one to the suction station 11 through the feeding and conveying device 2, so that the semi-finished resistance strips correspond to the material picking position of the vacuum adsorption component 31. (2) Vacuum adsorption transfer feeding: The vacuum adsorption component 31 moves to the suction station 11, adsorbs a single semi-finished resistor strip, and transports the semi-finished resistor strip to the top of the feeding guide device 4 by moving, and breaks the vacuum to release the semi-finished resistor strip so that it falls naturally. (3) Feeding and guiding: The strip baffle 41 of the feeding and guiding device 4 receives the falling semi-finished resistance strip, and then rotates around the shaft to open, smoothly guiding the semi-finished resistance strip into the stepping conveyor 5, which in turn drives the semi-finished resistance strip to the cutting station 12. (4) Cutting station 12 pauses conveying and waits for cutting: When the semi-finished resistor strip is conveyed to the cutting station 12, the stepping conveyor 5 pauses the conveying of each product on the semi-finished resistor strip and waits for cutting. (5) Pin length cutting: The clamping component 81 of the reciprocating transfer device 8 moves to the cutting station 12. The clamping component 81 clamps the last product on the end of the semi-finished resistor strip. First, the fixed blade 65 is driven to extend and abut against the positioning side of the product pin. Then, the moving blade 66 is driven to extend quickly and cooperate with the fixed blade 65 to complete the pin length cutting. After the cutting is completed, the moving blade 66 and the fixed blade 65 are reset in sequence. (6) Pressure-holding pin forming: The product with the pins cut is taken out from the semi-finished resistor strip and transferred to the forming station 13 by the reciprocating transfer device 8. First, the positioning clamping component 71 is driven to clamp the product and press against the pin bending reference surface; then the forming pushing component 72 is driven to extend and push the pin end to bend to the preset angle; after bending to the position, the preset pressure holding time is maintained, and then the forming pushing component 72 and the positioning clamping component 71 are reset in sequence. (7) Tape and tape packaging and receiving: The formed product is transferred to the tape and tape station 14 by the reciprocating transfer device 8, the component 81 is clamped to release the product, and the product is loaded into the empty space of the carrier tape plastic shell; the hot melt tape is hot-pressed and sealed on the surface of the carrier tape plastic shell by the carrier tape packaging device 9, and the packaged carrier tape is wound up and stored.

[0053] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this invention are included within the scope of protection of this invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this invention or exceed the scope defined in these claims, all of which should fall within the scope of protection of this invention.

Claims

1. An automated production equipment for irregularly shaped varistors, comprising a frame and a control unit, characterized in that: The frame is provided with a material suction station, a cutting station, a forming station and a tape-making station in sequence along the material processing flow direction; the frame is provided with a feeding conveyor, a vacuum suction device, a material unloading guide device, a stepping conveyor, a lead cutting device, a lead forming device, a reciprocating transfer device and a carrier tape packaging device that are electrically connected to the control unit. The feeding and conveying device corresponds to the suction station and is used to carry the semi-finished resistance strips and convey them one by one to the suction station. The vacuum suction device is equipped with a vacuum adsorption component that can move back and forth in a straight line. The adsorption end of the vacuum adsorption component can move back and forth between the suction station and the top of the unloading guide device to adsorb the semi-finished resistor strip and transfer it to the top of the unloading guide device. The feeding and guiding device corresponds to the feeding end of the stepping conveyor and is equipped with a flip-open strip baffle to receive the semi-finished resistance strip released by the vacuum adsorption component and guide the semi-finished resistance strip into the stepping conveyor. The discharge end of the stepping conveyor corresponds to the cutting station. The semi-finished resistance strip is conveyed to the cutting station through the stepping conveyor, and the products on the semi-finished resistance strip that arrive at the cutting station are paused one by one to wait for cutting. The reciprocating transfer device is installed above the cutting station, forming station and tape-making station. The reciprocating transfer device is equipped with a gripping component that can move horizontally back and forth, used to grip and transfer products between the cutting station, forming station and tape-making station. The pin cutting device corresponds to the cutting station and is equipped with a fixed blade and a moving blade facing each other. The clamping component clamps the last product on the end of the semi-finished resistor strip and cuts the pins of the clamped and positioned product to a fixed length. The lead forming device corresponds to the forming station and is equipped with a positioning clamping component and a forming pushing component. The product with cut leads is taken out from the semi-finished resistor strip and transferred to the forming station by a reciprocating transfer device. The lead forming device then bends and forms the product leads. The carrier tape packaging device corresponds to the taping station. The reciprocating transfer device transfers the formed product to the taping station, and the carrier tape packaging device loads the formed product into the carrier tape shell and completes the heat sealing and material collection operations.

2. The automated production equipment for irregularly shaped varistors as described in claim 1, characterized in that: The vacuum suction device includes the vacuum adsorption component and a first cylinder capable of driving the vacuum adsorption component to move between the suction station and the material feeding guide device. The vacuum adsorption component includes an adsorption mounting base and multiple suction cups. The first cylinder is mounted on the frame, with the piston rod of the first cylinder extending upward toward the material feeding guide device. The adsorption mounting base is mounted on the end of the piston rod of the first cylinder, and each suction cup is mounted on the adsorption mounting base, with the adsorption direction of each suction cup facing downward.

3. The automated production equipment for irregularly shaped varistors as described in claim 1, characterized in that: The feeding and guiding device includes two tilting cylinders, a rotating shaft, and the strip baffle. The rotating shaft is rotatably mounted on the frame. The fixed edge of the strip baffle is fixedly mounted on the rotating shaft. A rocker arm is fixedly mounted at each end of the rotating shaft. Both tilting cylinders are mounted on the frame. The piston rods of both tilting cylinders extend toward the feeding end of the stepping conveyor. The ends of the piston rods of the two tilting cylinders are hinged to the free ends of the corresponding rocker arms. The free edge of the strip baffle has an upwardly bent portion.

4. The automated production equipment for irregularly shaped varistors as described in claim 1, characterized in that: The stepping conveyor includes a wheel frame, two pulleys, an annular belt, a side baffle, a clamping cylinder, a positioning trigger assembly, and a stepper motor capable of driving one of the pulleys to rotate. The wheel frame is movably mounted on the machine frame, the stepper motor is mounted on the wheel frame, and the two pulleys are rotatably mounted on the wheel frame. The annular belt is tensioned on the outside of the two pulleys. The annular belt has a forward section running from back to front and a return section running from front to back. The forward section of the annular belt is the working surface. The side baffle is mounted on the machine frame and is positioned opposite to the forward section of the annular belt, forming a conveying channel between the side baffle and the forward section of the annular belt. The bottom of the conveying channel is provided with a support strip for supporting the semi-finished resistance strip. The clamping cylinder is mounted on the machine frame, and the piston rod of the clamping cylinder extends towards the position of the side baffle. The end of the piston rod of the clamping cylinder is connected to the wheel frame. The positioning trigger assembly is mounted on the front end of the side baffle and corresponds to the cutting station.

5. The automated production equipment for irregularly shaped varistors as described in claim 1, characterized in that: The pin cutting device includes a fixed-blade cylinder, a moving-blade cylinder, a fixed-blade holder, a moving-blade holder, a fixed blade, and a moving blade. The fixed-blade cylinder and the moving-blade cylinder are respectively mounted on the frame. The piston rod of the fixed-blade cylinder extends in a direction opposite to the piston rod of the moving-blade cylinder and is on the same straight line. The fixed-blade holder is mounted on the end of the piston rod of the fixed-blade cylinder, and the fixed blade is mounted on the fixed-blade holder. The moving-blade holder is mounted on the end of the piston rod of the moving-blade cylinder, and the moving blade is mounted on the moving-blade holder. The discharge end of the stepping conveyor is located between the fixed blade and the moving blade. The working end face of the fixed blade is a stepped positioning surface that matches the shape of the product pin, and the working end face of the moving blade is a stepped cutting blade that matches the shape of the product pin.

6. The automated production equipment for irregularly shaped varistors as described in claim 1, characterized in that: The reciprocating transfer device includes a transfer seat, a bearing, a central shaft, a transverse guide rail, a slide block, a vertical guide rail, a connecting rod, a transfer motor, and the clamping assembly. The transfer seat is movably mounted on the frame and has an inverted U-shaped guide groove. The bearing is located in the inverted U-shaped guide groove and moves back and forth along it. The central shaft is mounted on the bearing and extends forward and backward. The transverse guide rail is mounted on the transfer seat and is located below the inverted U-shaped guide groove. A movable first slider is provided on the transverse guide rail, a slide block is mounted on the first slider, and a second slider is provided on the slide block. The vertical guide rail is slidably mounted on the second slider and can move up and down along it. The upper end of the vertical guide rail is connected to the central shaft, and the connecting rod is also connected to the central shaft. The transfer motor is mounted on the transfer seat and drives the connecting rod to rotate. The clamping assembly includes a lifting seat and two mechanical claws. The lifting seat is mounted on the second slider, and both mechanical claws are mounted on the lifting seat with their clamping ends facing downwards. The two ends of the inverted U-shaped guide groove have a first lowest point and a second lowest point. When the lifting seat is at the first lowest point, the clamping ends of the two mechanical claws correspond to the cutting station and the forming station, respectively. When the lifting seat is at the second lowest point, the clamping ends of the two mechanical claws correspond to the forming station and the tape-making station, respectively.

7. The automated production equipment for irregularly shaped varistors as described in claim 6, characterized in that: The positioning and clamping assembly includes a positioning guide rail, two positioning sliders, two positioning clamps, and two positioning cylinders. The positioning guide rail is mounted on the frame. Both positioning sliders are slidably mounted on the positioning guide rail and can move along it. The two positioning clamps are respectively mounted on the corresponding positioning sliders, and each of the two positioning clamps has a positioning groove on its inner edge for positioning product pins. Both positioning cylinders are mounted on the frame, with their piston rods extending in opposite directions and aligned on the same straight line. The ends of the piston rods of the two positioning cylinders are respectively connected to the corresponding positioning sliders. The forming and pushing assembly includes a forming guide rail, two forming sliders, two forming blocks, and two forming cylinders. The forming guide rail is mounted on the frame and perpendicular to the positioning guide rail. Both forming sliders are slidably mounted on the forming guide rail and can move along it. The two forming blocks are respectively mounted on the corresponding forming sliders and are located below and outside the two positioning clamps. Both forming cylinders are mounted on the frame, with their piston rods extending in opposite directions and aligned on the same straight line. The ends of the piston rods of the two forming cylinders are respectively connected to the corresponding forming sliders.

8. The automated production equipment for irregularly shaped varistors as described in claim 1, characterized in that: The carrier tape packaging device includes an upper tape unwinding mechanism, a plastic shell unwinding mechanism, a heat sealing mechanism, and a carrier tape winding mechanism. The plastic shell unwinding mechanism, the heat sealing mechanism, and the carrier tape winding mechanism are arranged sequentially on the frame along the product processing flow direction, with the upper tape unwinding mechanism located above the plastic shell unwinding mechanism.

9. The automated production equipment for irregularly shaped varistors as described in claim 8, characterized in that: The heat sealing mechanism includes two sealing cylinders, two heating seats, and two heating heads. The two sealing cylinders are mounted on the frame with their piston rods facing downwards. The two heating seats are respectively mounted on the piston rod ends of the corresponding sealing cylinders. The two heating heads are respectively mounted on the corresponding heating seats, and the two heating heads are respectively positioned directly above the sealing edges on both sides of the carrier tape.

10. A method for producing the irregularly shaped varistor using an automated production equipment according to any one of claims 1-9, characterized in that... Includes the following steps: (1) Feeding and conveying: The semi-finished resistance strips with the product attached are neatly stacked on the feeding and conveying device. The semi-finished resistance strips are conveyed one by one to the suction station through the feeding and conveying device, so that the semi-finished resistance strips correspond to the material picking position of the vacuum adsorption component. (2) Vacuum adsorption transfer feeding: The vacuum adsorption component moves to the suction station, adsorbs a single semi-finished resistor strip, and transports the semi-finished resistor strip to the top of the feeding guide device by moving, and breaks the vacuum to release the semi-finished resistor strip so that it falls naturally. (3) Feeding and guiding: The strip baffle of the feeding and guiding device receives the falling semi-finished resistance strip, and then rotates around the shaft to open, smoothly guiding the semi-finished resistance strip into the stepping conveyor, which then drives the semi-finished resistance strip to the cutting station. (4) The cutting station pauses the conveying and waits for cutting: When the semi-finished resistor strip is conveyed to the cutting station, the stepping conveyor pauses the conveying of each product on the semi-finished resistor strip and waits for cutting. (5) Pin length cutting: The clamping component of the reciprocating transfer device moves to the top of the cutting station and clamps the last product on the end of the semi-finished resistor strip. First, the fixed blade is driven to extend and abut against the positioning side of the product pin, and then the moving blade is driven to extend quickly and cooperate with the fixed blade to complete the pin length cutting. After the cutting is completed, the moving blade and the fixed blade are reset in sequence. (6) Pressure-holding pin forming: The product with the pins cut is taken out from the semi-finished resistor strip and transferred to the forming station by the reciprocating transfer device. First, the positioning clamping component is driven to clamp the product and press against the pin bending reference surface. Then, the forming pushing component is driven to extend and push the pin end to bend to the preset angle. After bending into place, the preset pressure holding time is maintained. Then the forming pushing component and the positioning clamping component are reset in sequence. (7) Tape and reel packaging and receiving: The formed product is transferred to the tape and reel station by the reciprocating transfer device, the component is clamped and the product is released, and the product is loaded into the empty space of the carrier tape plastic shell; the hot melt tape is hot-pressed and sealed on the surface of the carrier tape plastic shell by the carrier tape packaging device, and the packaged carrier tape is wound up and stored.

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