A roll-less straight-through cutting system for connector terminal continuous strip and a cutting method thereof

Abstract

A no-reel straight-through cutting system for a connector terminal continuous strip and a cutting method thereof; the high-temperature hanging length of the connector terminal continuous strip before and after injection molding treatment is uncontrollable, the straightening treatment is not standardized, and there is no standard treatment method; the material outlet of the material reel, the first material inlet of the front material pulling positioning machine, the first material outlet of the front material pulling positioning machine, the second material inlet of the injection mold, the second material outlet of the injection mold and the third material inlet of the rear material pulling and cutting integrated machine are coaxially communicated to form a straight-through channel; one end of the connector terminal continuous strip is arranged in the material reel, and the other end is sequentially arranged between the front material pulling positioning machine, the injection mold and the rear material pulling and cutting integrated machine; the connector terminal continuous strip is in a straight body pretreatment state in the front material pulling positioning machine, the connector terminal continuous strip is in a plasticized wrapped state in the injection mold, and the connector terminal continuous strip is in a plasticized cut state in the rear material pulling and cutting integrated machine.

Description

Technical Field

[0001] This invention specifically relates to a roll-less straight-through cutting system and method for continuous strip of connector terminals. Background Technology

[0002] The current standard offline winding process involves continuous terminal strip injection molding, followed by winding into a roll by a winding machine after demolding, workshop turnover, secondary unloading, and positioning and cutting by a cutting machine. This process suffers from several technical drawbacks that have not been adequately addressed, primarily:

[0003] First: The problem of stress accumulation and irreversible deformation in high-temperature plastics: Miniature high-speed connectors mostly use LCP high-temperature engineering plastics, with injection molding temperatures as high as 280-350℃. The plastic parts are in a state of thermoplastic softening and unreleased stress. When directly wound by a winding machine, the material strip is subjected to the dual effects of winding tension and radial extrusion force. On the one hand, this causes internal stress cracking, warping deformation, and uneven dimensional shrinkage in the plastic body. Especially for miniature ultra-thin plastic shells, the flatness deviation after winding exceeds 0.05mm, which cannot meet the subsequent assembly tolerance requirements. On the other hand, the terminal strip is an ultra-thin metal material with a thickness of 0.1-1mm. After winding, it is easy for the terminal to bend, the pin to be crooked, and the coplanarity to exceed the standard. The above deformation is plastic deformation, which cannot be corrected in subsequent processes, directly leading to a decrease in product yield.

[0004] Secondly, the problem of accuracy loss and cumulative error in secondary positioning has not been reliably solved. The main issue is that when the roll material is cut for the second time, the material strip needs to be fed, straightened, and positioned again. During the feeding process, the material strip is prone to loosening, shifting, and deviation. The straightening mechanism will exacerbate the relative displacement between the terminals and the plastic parts. At the same time, during the storage of the roll material, the material strip is prone to moisture and dust absorption. When the positioning pin and the positioning hole of the material strip are matched, there will be gap deviation. The single positioning error can reach 0.03-0.08mm. When producing multi-cavity molds, the deviation of the cutting position of each cavity product is superimposed, which cannot guarantee the cutting consistency. It is very easy to have problems such as cutting burrs, material bridges that cannot be cut, terminal damage, or other defects.

[0005] Third: Redundant processes and uncoordinated production control. Due to the cumbersome processes of winding, unwinding, turnover, and secondary feeding, multiple winding and unwinding machines and dedicated turnover racks are required, occupying a large amount of workshop space. During production, frequent machine stops are required to change rolls and connect processes, resulting in an equipment utilization rate of less than 60%. The production cycle is limited by the capacity of the injection molding and cutting machines, making continuous production impossible. Furthermore, scratches, dents, and dust pollution are prone to occur during the turnover of rolls, further increasing the rate of appearance defects. At the same time, the large number of manual interventions makes it easy for errors to pick up the strip and for problems such as stacking materials to occur, making it difficult to ensure production stability and standardization.

[0006] Fourth: Material strip loss and hidden cost increase: Each time the roll is changed or the machine is started for debugging, a large amount of material heads and tails need to be discarded, and the scrap rate of a single debugging is 3%-5%; the wound material strip is prone to knotting and deformation, and manual screening and scrapping are required before cutting, which further increases the material cost; in addition, the purchase, maintenance and energy consumption costs of the winding and unwinding equipment are high, and the labor turnover and debugging costs are high.

[0007] Furthermore, in-mold cutting requires integrating the cutting mechanism inside the injection mold, resulting in a complex mold structure, high processing precision requirements, and mold costs that are 2-3 times higher than ordinary molds. Maintenance is also difficult, as the entire mold needs to be disassembled for repair after the die wears out, leading to long downtime. Additionally, in-mold cutting can only achieve a single cutting mode, unable to flexibly switch between multi-row cutting and single-piece separation cutting, limiting its applicability to a limited range of product types. More importantly, injection and cutting occur simultaneously, and the high-temperature plastic does not cool and solidify before in-mold cutting, easily causing plastic to stick to the die, resulting in burrs on the cut surface. Furthermore, terminals are prone to displacement due to in-mold impact, making it unsuitable for the production of ultra-thin, miniature, and high-precision connectors. Moreover, in-mold cutting cannot achieve real-time removal of cutting waste, which can remain in the mold cavity, causing product damage and mold breakage.

[0008] In addition, the segmented direct feeding process, which involves manual traction and simple conveyor belt transport to the cutting machine after injection molding, eliminates the winding process but fails to solve the core technical problems: the material belt lacks synchronous traction and precise guiding mechanisms during transport, making it prone to stretching, shifting, and stacking; the high-temperature material belt cools slowly naturally, and its own weight causes it to sag and deform during transport, compromising cutting positioning accuracy; furthermore, the limiting structure results in poor material belt dimensional stability, and cutting accuracy and product consistency rely entirely on manual adjustments, which cannot meet the needs of large-volume, high-precision mass production and is only suitable for low-precision, small-batch product processing.

[0009] In summary, the high-temperature suspension length of continuous connector terminal strips before and after injection molding is currently uncontrollable, the straightening process is not standardized, and there is no standardized processing method. Summary of the Invention

[0010] To overcome the shortcomings of the existing technology, a roll-less straight-through cutting system and cutting method for continuous strip of connector terminals are provided to solve the above problems.

[0011] A roll-less straight-through cutting system for continuous strip of connector terminals includes a worktable, a strip roll, a front-pull positioning machine, a rear-pull cutting machine, an injection mechanism, and an injection mold. The worktable is horizontally positioned. The strip roll, front-pull positioning machine, injection mold, and rear-pull cutting machine are sequentially arranged along the length of the worktable. The injection mechanism is positioned above the injection mold, with its outlet facing the injection port of the mold. The strip roll's outlet is coaxially aligned with the first inlet of the front-pull positioning machine, the first outlet of the front-pull positioning machine is coaxially aligned with the second inlet of the injection mold, and the second outlet of the injection mold is coaxially aligned with the third inlet of the rear-pull cutting machine. The tape reel outlet, the first feed inlet of the front feeding and positioning machine, the first discharge outlet of the front feeding and positioning machine, the second feed inlet of the injection mold, the second discharge outlet of the injection mold, and the third feed inlet of the rear feeding and cutting machine are coaxially connected to form a straight channel for the continuous material strip of the connector terminal. One end of the continuous material strip of the connector terminal is set inside the tape reel, and the other end of the continuous material strip of the connector terminal is sequentially passed between the front feeding and positioning machine, the injection mold, and the rear feeding and cutting machine. The continuous material strip of the connector terminal is in a straight pre-treatment state in the front feeding and positioning machine, in a plasticized and wrapped state in the injection mold, and in a plasticized and cut state in the rear feeding and cutting machine.

[0012] As a preferred embodiment: the front-pull positioning machine includes a front main support frame, a front support base, a front side support seat, a front main guide rail, a front connecting frame, a front slide rail, a front first drive component, a front second drive component, a front control block, a front slider, and two front positioning pins. The front main support frame is horizontally mounted on the worktable. The front support base, the front slide rail, and the front side support seat are arranged side by side on the front main support frame. The front main guide rail is mounted on the front support base. The top surface of the front main guide rail is machined with a front placement groove. The two ends of the front placement groove are a first inlet and a first outlet, respectively. A continuous strip of connector terminals is mounted on the front placement groove. The bottom of the front connecting frame is connected to... It has a front slider and two front positioning pins. The front placement groove is machined with front insertion holes that correspond one-to-one with the front positioning pins. The front insertion holes are elongated holes. The front slider slides with the front slide rail. The front support base is provided with a front limiting groove that mates with the front connecting frame. The front first drive unit is connected to the front connecting frame. The front first drive unit drives the front connecting frame to make a reciprocating sliding motion along the length of the front slide rail. The front second drive unit is connected to the front connecting frame through the front control block. The two front positioning pins on the front connecting frame make a reciprocating lifting motion by inserting into the front insertion hole to position the continuous strip of the connector terminal or disengaging from the front insertion hole to release the continuous strip of the connector terminal.

[0013] As a preferred embodiment: the front connecting frame includes a horizontal front connecting frame, a connecting block, and a vertical front connecting frame. The horizontal front connecting frame is connected to the connecting block, and the bottom of the horizontal front connecting frame is connected to the front slider. The bottom of the vertical front connecting frame is provided with two front positioning pins arranged side by side. The vertical front connecting frame includes a connecting post and a U-shaped frame. The two ends of the connecting post are fixedly connected to the U-shaped frame as a whole. The connecting post passes through the connecting block and slides back and forth along the height direction of the connecting block. The connecting block is machined with an elongated hole that matches the connecting post. The front control block includes a rectangular block and a limiting post. The rectangular block is machined with an inclined hole along its thickness direction. One end of the limiting post passes through the inclined hole, and the other end of the limiting post passes through the elongated hole and connects to the connecting post. When the front control block slides horizontally back and forth along the length direction of the connecting block under the drive of the front second driving member, the connecting post makes a vertical lifting and lowering movement under the cooperation of the front control block and the front second driving member. The two front positioning pins make a vertical lifting and lowering movement synchronously under the drive of the connecting post.

[0014] As a preferred embodiment: the injection mold includes a lower module, an upper module, a positioning pin plate, a front guide pressure plate, a rear guide pressure plate, and a lifting and positioning control assembly. The lower module has a front guide pressure plate and a rear guide pressure plate at its two ends, respectively. The connector terminal continuous strip is disposed between the front guide pressure plate, the lower module, and the rear guide pressure plate. The upper module is positioned above the lower module, and an injection cavity is formed between the upper and lower modules. The upper module is connected to the lower module via the lifting and positioning control assembly. A positioning pin plate is disposed on the bottom surface of the upper module. The positioning pin plate includes a plate body and two rows of front positioning pins. The bottom surface of the plate body... Two rows of front positioning pins are arranged side by side along the length of the continuous strip of connector terminals. The positioning pin plate makes a reciprocating motion of lowering to position the continuous strip of connector terminals or raising to release the continuous strip of connector terminals under the drive of the lifting and positioning component. When the injection mold is in the mold closed state, the upper module is close to the lower module, and the positioning pin plate is in the state of lowering to position the continuous strip of connector terminals under the drive of the lifting and positioning component. When the injection mold is in the mold open state, the upper module and the lower module are in the separated state, and the positioning pin plate is in the state of raising to release the continuous strip of connector terminals under the drive of the lifting and positioning component.

[0015] As a preferred embodiment: the structure of the front guide pressure seat is the same as that of the rear guide pressure seat. The front guide pressure seat includes a base and two upper clamping blocks. One side of the base is fixedly connected to the lower module. The top surface of the base is flush with the top surface of the lower module. The base has a groove that is connected to the injection cavity. The two upper clamping blocks are vertically arranged side by side on the base. Each upper clamping block has a notch at its bottom. The bottom of each upper clamping block engages with the base. A positioning gap for the continuous material strip of the connector terminal is formed between each notch and the base. A top operating gap for the continuous material strip of the connector terminal is formed between the two upper clamping blocks.

[0016] As a preferred option, the injection mechanism is an injection mechanism with a telescopic injection cylinder, and the telescopic injection cylinder of the injection mechanism is connected to the injection cavity.

[0017] As a preferred embodiment: the rear-pull material cutting integrated machine includes a rear-pull material positioning machine and a cutting machine. The rear-pull material positioning machine includes a rear main support frame, a rear support base, a rear side support seat, a rear main guide rail, a rear connecting frame, a rear slide rail, a rear first drive component, a rear second drive component, a rear control block, a rear slider, and two rear positioning pins. The rear main support frame is horizontally set on the worktable. The rear support base, rear slide rail, and rear side support seat are arranged side by side on the rear main support frame. The rear main guide rail is provided on the rear support base. The top surface of the rear main guide rail is machined with a rear placement groove. The end of the rear placement groove facing the injection mold is the third feed port. The connector terminal continuous strip is set on the rear placement groove. The bottom of the connecting frame is connected to a rear slider and two rear positioning pins. The rear placement groove is machined with rear insertion holes that correspond one-to-one with the rear positioning pins. The rear insertion holes are elongated holes. The rear slider slides in cooperation with the rear slide rail. The rear support base is provided with a rear limiting groove that cooperates with the rear connecting frame. The rear first drive unit is connected to the rear connecting frame. The rear first drive unit drives the rear connecting frame to make a reciprocating sliding motion along the length of the rear slide rail. The rear second drive unit is connected to the rear connecting frame through the rear control block. The two rear positioning pins on the rear connecting frame make a reciprocating lifting motion by inserting into the rear insertion hole to position the continuous material strip of the connector terminal or disengaging from the rear insertion hole to release the continuous material strip of the connector terminal under the drive of the rear second drive unit and the rear control block.

[0018] The cutting machine is mounted on the rear main support frame, near the other end of the rear placement slot. The cutting machine includes a drive cylinder, a vertical support frame, a guide strip, a cutter, and two strip-shaped support pieces. The vertical support frame is vertically mounted on the rear main support frame. The guide strip is located at the bottom of the rear main support frame. Two strip-shaped support pieces are arranged side-by-side along the length of the top surface of the guide strip. A cutting groove is formed between the two strip-shaped support pieces and the top surface of the guide strip. The cutting groove is connected to the rear limiting slot. The bottom of the front placement slot, the bottom of the rear limiting slot, and the bottom of the cutting groove are on the same horizontal plane. The continuous strip of connector terminals is placed between the front placement slot, the rear limiting slot, and the cutting groove. The drive cylinder is located at the top of the vertical support frame. The cutter is located inside the vertical support frame. The upper end of the cutter is connected to the telescopic end of the drive cylinder, and the lower end of the cutter is located above the cutting groove. Driven by the drive cylinder, the cutter performs a reciprocating lifting motion, either falling to cut the continuous strip of connector terminals or rising to reset.

[0019] A method for cutting continuous strip of connector terminals without a roll is provided. This method utilizes the aforementioned system for cutting continuous strip of connector terminals without a roll. The system is debugged to ensure that the strip's outlet, the first inlet of the front-pull positioning machine, the first outlet of the front-pull positioning machine, the second inlet of the injection mold, the second outlet of the injection mold, and the third inlet of the rear-pull cutting machine are coaxially connected to form a straight channel. The method ensures that the horizontal deviation of the straight channel is ≤0.02mm / m, and the height difference between the lower mold outlet surface of the injection molding machine and the feed guide groove of the traction mechanism is ≤0.5mm. The continuous strip of connector terminals is then released from the strip into the straight channel, ensuring that the suspended conveying stroke of the strip at high temperatures is shortened as required.

[0020] Start the no-roll material straight-through cutting system and ensure that the material roll, front pull positioning machine, rear pull cutting machine, injection mechanism and injection mold are connected to the same PLC control system. The cycle linkage coefficient ratio between the material roll, front pull positioning machine, rear pull cutting machine, injection mechanism and injection mold is 1:1:1:1:1, thereby realizing the synchronous processing of the entire process of mold opening, traction feeding and cutting in the no-roll material straight-through cutting system.

[0021] As a preferred solution: In the no-roll material straight-through cutting system, the entire process of mold opening, traction feeding, and cutting is processed synchronously. After the continuous strip of connector terminals is pulled out from the roll, it enters the front placement slot of the front pulling and positioning machine. The front connecting frame, front slide rail, front first drive, front second drive, front control block, and front slider cooperate with each other to complete the process of moving the two front positioning pins forward and lowering to position the continuous strip of connector terminals. The feeding step is 14 to 18 positioning hole pitches on the continuous strip of connector terminals, and the step accuracy is ±0.01mm. This forms a process in which the two front positioning pins continuously step towards the roll, driving the continuous strip of connector terminals to move towards the injection mold.

[0022] After the material roll and the front puller positioning machine work together to complete the feeding, the two front positioning pins disengage from the positioning holes on the continuous material strip of the connector terminals. The material roll and the front puller positioning machine are then ready for the next feeding cycle. The feeding speed is matched with the injection cycle, which is 20~25s, corresponding to a step feeding time of 0.5~1.0s. The feeding acceleration is ≤50mm / s², thus ensuring that the continuous material strip of the connector terminals is in a taut and stretched state, and is uniformly and stably conveyed horizontally and linearly to the injection mold at the predetermined feeding speed.

[0023] The continuous strip of connector terminals enters the mold. The upper module performs coarse positioning on the continuous strip of connector terminals. The upper module then uses positioning pins to precisely fix the continuous strip of connector terminals between the front guide pressure seat, the lower module, and the rear guide pressure seat. After that, the upper module continues to fall to close the mold. The injection mechanism injects the continuous strip of connector terminals into the injection cavity. The injection temperature range of the telescopic injection cylinder of the injection mechanism is 290~330℃, the mold temperature range is 100~130℃, the injection pressure range is 80~120MPa, the holding pressure range is 30~50MPa, and the cooling time range is 3~8s. The mold can be opened when the surface temperature of the continuous strip of connector terminals in the injection cavity drops to 180~220℃.

[0024] The continuous strip of connector terminals after injection molding is moved out of the injection mold by the cooperation of the front and rear material pulling positioning machines and then enters the rear limit groove of the material pulling and cutting integrated machine for positioning and alignment. After being moved out, it is cut by the cutting machine. The cutting force of 50~200N is configured according to the thickness range of 0.1~1mm of the continuous strip of connector terminals, so as to ensure that the continuous strip of connector terminals is cut under the appropriate impact force.

[0025] While the continuous strip of single-segment connector terminals after cutting is being collected, the strip reel, front pull positioning machine, rear pull cutting integrated machine, injection molding mechanism and injection mold work together to enter the next injection molding cutting cycle.

[0026] The beneficial effects of this invention are as follows:

[0027] The non-coiled straight-through cutting system of this invention achieves a multi-position coaxial straight-through processing method by cooperating with the worktable, material roll winding, front pulling positioning machine, rear pulling cutting integrated machine, injection molding mechanism and injection mold. This forms a standardized straight-through structure for the continuous process of connector terminal continuous material strip from feeding, positioning, injection molding, pressing, cutting and discharge, eliminating intermediate winding and rewinding operations, avoiding high-temperature suspension, and forming a standardized straight-through process for injection molding, demolding, continuous tape feeding and line cutting. It ensures straight-line transportation of high-temperature material strip without deformation, warping and damage. It can complete online precise positioning according to predetermined requirements and precise high-speed cutting at predetermined speed, which helps to reduce and standardize configuration costs and standardize the processing procedures of micro high-speed connectors.

[0028] The roll-less straight-through cutting method of this invention is a standardized cutting method implemented solely through a roll-less straight-through cutting system. It achieves synchronized processing of the entire process—mold opening, traction feeding, and cutting—according to predetermined requirements. This roll-less straight-through cutting method is suitable for injection molding scenarios involving miniature high-speed connectors, LCP high-temperature plastics, and continuous terminal strip inserts. It is particularly well-suited for achieving integrated roll-through operations of injection molding demolding, linear traction, and online cutting, eliminating intermediate winding, rewinding, and turnover steps, and meeting the predetermined precision requirements of standardized roll-through operations. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the main structure of the roll-free straight-through cutting system of the present invention;

[0030] Figure 2 This is a three-dimensional structural diagram of the roll-free straight-through cutting system of the present invention;

[0031] Figure 3 This is a side view of the non-roll material straight-through cutting system of the present invention;

[0032] Figure 4 This is a schematic diagram of the first three-dimensional structure of the front-pull material positioning machine;

[0033] Figure 5 This is a schematic diagram of the second three-dimensional structure of the front-pull material positioning machine; only a portion of the structure, the rear main support frame, is shown in the diagram.

[0034] Figure 6 A three-dimensional structural diagram showing the relative positional relationship between the front second drive component, the front control block, the front positioning pin, the front insertion hole, and the front limiting groove;

[0035] Figure 7 This is a schematic diagram of the third three-dimensional structure of the front-pull material positioning machine, with the front main support frame removed from the diagram;

[0036] Figure 8 This is a schematic diagram of the fourth three-dimensional structure of the front-pull material positioning machine, with the front main support frame removed from the diagram;

[0037] Figure 9 This is a diagram showing the operational status of the front-pull material positioning machine;

[0038] Figure 10 This is a diagram showing the usage status of an injection mold;

[0039] Figure 11 A three-dimensional structural diagram of the injection molding mechanism and injection mold on the worktable;

[0040] Figure 12 A three-dimensional structural diagram showing the connection between the injection molding mechanism and the injection mold;

[0041] Figure 13This is a three-dimensional structural diagram of the front guide pressure seat.

[0042] Figure 14 This is a schematic diagram of the three-dimensional structure of an injection mold;

[0043] Figure 15 This is a schematic diagram of the main structure of the back-pulling material cutting machine on the worktable.

[0044] Figure 16 This is a three-dimensional structural diagram of the back-pulling material cutting machine on the workbench;

[0045] Figure 17 This is a schematic diagram of the first three-dimensional structure of the rear-pull material cutting integrated machine;

[0046] Figure 18 This is a schematic diagram of the second three-dimensional structure of the back-pulling material cutting integrated machine.

[0047] In the diagram: 1-Workbench; 2-Material roll; 3-Front material pulling and positioning machine; 3-1-Front main support frame; 3-2-Front support base; 3-3-Front side support seat; 3-4-Front main directional track bar; 3-5-Front connecting frame; 3-5-1-Horizontal front connecting frame; 3-5-2-Connecting block; 3-5-3-Vertical front connecting frame; 3-5-3-1-Connecting column; 3-5-3-2-U-shaped frame; 3-6-Front slide rail; 3-7-Front first driving component; 3-8-Front second driving component; 3-9-Front control block; 3-9-1-Rectangular block; 3-9-2-Limiting column; 3-9-3-Inclined hole; 3-10-Front slider; 3-11-Front positioning pin; 3-12-Front insertion hole; 3-13-Front limiting groove; 3-14-Front placement groove;

[0048] 4- Rear-pulling material cutting integrated machine; 4-1- Rear-pulling material positioning machine; 4-1-1- Rear main support frame; 4-1-2- Rear support base; 4-1-3- Rear side support seat; 4-1-4- Rear main guide rail strip; 4-1-5- Rear connecting frame; 4-1-6- Rear slide rail; 4-1-7- Rear first drive component; 4-1-8- Rear second drive component; 4-1-9- Rear control block; 4-1-10- Rear slider; 4-1-11- Rear positioning pin; 4-1-12- Rear insertion hole; 4-1-13- Rear limiting groove; 4-1-14- Rear placement groove; 4-2- Cutting machine; 4-2-1- Drive cylinder; 4-2-2- Vertical support frame; 4-2-3- Guide strip; 4-2-4- Cutting knife; 4-2-5- Strip-shaped support piece;

[0049] 5-Injection molding mechanism; 6-Injection mold; 6-1-Lower module; 6-2-Upper module; 6-3-Positioning pin plate; 6-3-1-Plate body; 6-3-2-Front positioning pin; 6-4-Front guide pressure seat; 6-4-1-Base; 6-4-2-Upper clamping block; 6-4-3 Groove; 6-4-4-Notch; 6-4-5-Top operating gap; 6-4-6-Positioning gap; 6-5-Rear guide pressure seat; 7-Collection hopper; 20-Connector terminal continuous strip. Detailed Implementation

[0050] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0051] Specific implementation method one: Combining Figures 1 to 18This embodiment describes a continuous strip cutting system for connector terminals that uses a non-coil, straight-through cutting method. The system includes a worktable 1, a strip roll 2, a front-pull positioning machine 3, a rear-pull cutting machine 4, an injection molding mechanism 5, and an injection mold 6. The worktable 1 is horizontally positioned and serves to support the overall structure of the system. The strip roll 2, the front-pull positioning machine 3, the injection mold 6, and the rear-pull cutting machine 4 are sequentially arranged on the worktable 1 along its length. The strip roll 2 is an existing strip roll structure, and its working principle is the same as that of existing strip rolls. The injection molding mechanism 5 is located above the injection mold 6. The injection molding mechanism 5 is an existing injection molding mechanism, and its working principle is the same as that of existing injection molding mechanisms. The outlet of the injection mechanism 5 faces the injection port of the injection mold 6. The outlet of the material roll 2 is coaxially arranged with the first inlet of the front feeding and positioning machine 3. The first outlet of the front feeding and positioning machine 3 is coaxially arranged with the second inlet of the injection mold 6. The second outlet of the injection mold 6 is coaxially arranged with the third inlet of the rear feeding and cutting machine 4. The outlet of the material roll 2, the first inlet of the front feeding and positioning machine 3, the first outlet of the front feeding and positioning machine 3, the second inlet of the injection mold 6, the second outlet of the injection mold 6, and the third inlet of the rear feeding and cutting machine 4 are all coaxially arranged. The material inlet is coaxially connected to form a straight channel for the continuous material strip 20 of the connector terminal; one end of the continuous material strip 20 of the connector terminal is set in the material roll 2, and the other end of the continuous material strip 20 of the connector terminal is sequentially passed between the front material pulling positioning machine 3, the injection mold 6 and the rear material pulling and cutting integrated machine 4. The continuous material strip 20 of the connector terminal is in a straight pre-treatment state in the front material pulling positioning machine 3, the continuous material strip 20 of the connector terminal is in a plasticized and wrapped state in the injection mold 6, and the continuous material strip 20 of the connector terminal is in a plasticized and cut state in the rear material pulling and cutting integrated machine 4.

[0052] The injection molding mechanism 5 in this embodiment is an existing injection molding mechanism, specifically an injection molding mechanism with a telescopic injection cylinder. The telescopic injection cylinder of the injection molding mechanism 5 is connected to the injection cavity.

[0053] In this embodiment, the workbench 1 is equipped with a collection hopper 7, which is a conical hopper structure and is located near the third discharge port of the back-pulling and cutting integrated machine 4.

[0054] This invention relates to a processing system specifically designed for high-speed connectors and other related structures in the automated manufacturing technology of electronic connectors, specifically targeting the post-processing of cutting and processing after injection molding of continuous terminal strip inserts.

[0055] Specific Implementation Method Two: This implementation method is a further limitation of Specific Implementation Method One. In this implementation method, the front-pull material positioning machine 3 includes a front main support frame 3-1, a front support base 3-2, a front side support seat 3-3, a front main guide rail 3-4, a front connecting frame 3-5, a front slide rail 3-6, a front first drive component 3-7, a front second drive component 3-8, a front control block 3-9, a front slider 3-10, and two front positioning pins 3-11. The front main support frame 3-1 is horizontally arranged on the workbench 1. The front support base 3-2, the front slide rail 3-6, and the front side support seat 3-3 are arranged side by side on the front main support frame 3-1. The front main guide rail 3-4 is arranged on the front support base 3-2. The top surface of the front main guide rail 3-4 is machined with a front placement groove 3-14. The two ends of the front placement groove 3-14 are the first inlet and the first outlet, respectively. The connector terminal continuous strip 20 is arranged on the front placement groove 3-14. The front connecting frame 3-5... The bottom of component 5 is connected to a front slider 3-10 and two front positioning pins 3-11. The front placement groove 3-14 has corresponding front insertion holes 3-12 on each of the front positioning pins 3-11. The front insertion holes 3-12 are elongated holes. The front slider 3-10 slides with the front slide rail 3-6. The front support base 3-3 has a front limiting groove 3-13 that mates with the front connecting frame 3-5. The front first driving component 3-7 is connected to the front connecting frame 3-5. The front connecting frame 3-5 is driven to reciprocate along the length of the front slide rail 3-6. The front second drive member 3-8 is connected to the front connecting frame 3-5 through the front control block 3-9. The two front positioning pins 3-11 on the front connecting frame 3-5 are driven by the front second drive member 3-8 and the front control block 3-9 to reciprocate up and down to insert into the front insertion hole 3-12 to position the continuous material strip 20 of the connector terminal or to disengage from the front insertion hole 3-12 to release the continuous material strip 20 of the connector terminal.

[0056] In this embodiment, the first front drive component 3-7 and the second front drive component 3-8 are both existing electric telescopic cylinders. Their working principle is the same as that of existing electric telescopic cylinders. The specific configuration specifications can be selected according to the specific requirements.

[0057] In this embodiment, the front positioning pin 3-11 can specifically be a pin body or a positioning pin.

[0058] Specific Implementation Method 3: This implementation method is a further limitation of Specific Implementation Method 1 or 2. In this implementation method, the front connecting frame 3-5 includes a horizontal front connecting frame 3-5-1, a connecting block 3-5-2, and a vertical front connecting frame 3-5-3. The horizontal front connecting frame 3-5-1 is connected to the connecting block 3-5-2. The bottom of the horizontal front connecting frame 3-5-1 is connected to the front slider 3-10. The bottom of the vertical front connecting frame 3-5-3 has two front positioning pins 3-11 arranged side by side. The vertical front connecting frame 3-5-3 includes a connecting post 3-5-3-1 and a U-shaped frame 3-5-3-2. The two ends of the connecting post 3-5-3-1 are fixedly connected to the U-shaped frame 3-5-3-2 as a whole. The connecting post 3-5-3-1 passes through the connecting block 3-5-2 and reciprocates along the height direction of the connecting block 3-5-2. The sliding block 3-5-2 has an elongated hole that mates with the connecting post 3-5-3-1. The front control block 3-9 includes a rectangular block 3-9-1 and a limiting post 3-9-2. The rectangular block 3-9-1 is a slider structure. The rectangular block 3-9-1 has an inclined hole 3-9-3 along its thickness direction. One end of the limiting post 3-9-2 passes through the inclined hole 3-9-3, and the other end of the limiting post 3-9-2 passes through the elongated hole and connects with the connecting post 3-5-3-1. When the front control block 3-9 slides horizontally along the length of the connecting block 3-5-2 under the drive of the front second drive member 3-8, the connecting post 3-5-3-1 moves vertically up and down under the cooperation of the front control block 3-9 and the front second drive member 3-8. The two front positioning pins 3-11 move vertically up and down synchronously under the drive of the connecting post 3-5-3-1.

[0059] Specific Implementation Method Four: This implementation method is a further limitation of Specific Implementation Methods One, Two, or Three. In this implementation method, the injection mold 6 includes a lower module 6-1, an upper module 6-2, a positioning pin plate 6-3, a front guide pressure seat 6-4, a rear guide pressure seat 6-5, and a lifting and positioning control assembly. The lower module 6-1 has a front guide pressure seat 6-4 and a rear guide pressure seat 6-5 respectively at both ends. The connector terminal continuous strip 20 is disposed between the front guide pressure seat 6-4, the lower module 6-1, and the rear guide pressure seat 6-5. The upper module 6-2 is disposed above the lower module 6-1, and an injection cavity is formed between the upper module 6-2 and the lower module 6-1. The upper module 6-2 is connected to the lower module 6-1 through the lifting and positioning control assembly. A positioning pin plate 6-3 is disposed on the bottom surface of the upper module 6-2. 3 includes a plate body 6-3-1 and two rows of front positioning pins 6-3-2. Two rows of front positioning pins 6-3-2 are arranged side by side on the bottom surface of the plate body 6-3-1 along the length direction of the connector terminal continuous strip 20. The positioning pin plate 6-3, driven by the lifting and positioning component, makes a reciprocating motion of lowering to position the connector terminal continuous strip 20 or raising to release the connector terminal continuous strip 20. When the injection mold 6 is in the mold closed state, the upper module 6-2 is close to the lower module 6-1, and the positioning pin plate 6-3 is in the state of lowering to position the connector terminal continuous strip 20 under the drive of the lifting and positioning component. When the injection mold 6 is in the mold open state, the upper module 6-2 and the lower module 6-1 are in the separated state, and the positioning pin plate 6-3 is in the state of raising to release the connector terminal continuous strip 20 under the drive of the lifting and positioning component.

[0060] Specific Implementation Method Five: This implementation method is a further limitation of Specific Implementation Methods One, Two, Three, or Four. In this implementation method, the structure of the front guide pressure seat 6-4 is consistent with the structure of the rear guide pressure seat 6-5. The front guide pressure seat 6-4 includes a base 6-4-1 and two upper clamping blocks 6-4-2. One side of the base 6-4-1 is fixedly connected to the lower module 6-1. The top surface of the base 6-4-1 is flush with the top surface of the lower module 6-1. A groove 6-4-3 is machined on the base 6-4-1. -4-3 is connected to the injection cavity. Two upper clamping blocks 6-4-2 are vertically arranged side by side on the base 6-4-1. Each upper clamping block 6-4-2 has a notch 6-4-4 machined at the bottom. The bottom of each upper clamping block 6-4-2 is engaged with the base 6-4-1. A positioning gap 6-4-6 for the mating connector terminal continuous strip 20 is formed between each notch 6-4-4 and the base 6-4-1. A top operating gap 6-4-5 for the mating connector terminal continuous strip 20 is formed between the two upper clamping blocks 6-4-2.

[0061] Specific Implementation Method Six: This implementation method is a further limitation of Specific Implementation Methods One, Two, Three, Four, or Five. In this implementation method, the rear-pull material cutting integrated machine 4 includes a rear-pull material positioning machine 4-1 and a cutting machine 4-2. The rear-pull material positioning machine 4-1 includes a rear main support frame 4-1-1, a rear support base 4-1-2, a rear side support seat 4-1-3, a rear main guide rail 4-1-4, a rear connecting frame 4-1-5, a rear slide rail 4-1-6, a rear first drive component 4-1-7, a rear second drive component 4-1-8, a rear control block 4-1-9, and a rear slider 4-1-1. 0 and two rear positioning pins 4-1-11, the rear main support frame 4-1-1 is horizontally set on the worktable 1, the rear support base 4-1-2, the rear slide rail 4-1-6 and the rear side support seat 4-1-3 are arranged side by side on the rear main support frame 4-1-1, the rear support base 4-1-2 is provided with a rear main guide rail strip 4-1-4, the top surface of the rear main guide rail strip 4-1-4 is machined with a rear placement groove 4-1-14, the end of the rear placement groove 4-1-14 facing the injection mold 6 is the third feed port, the connector terminal continuous strip 20 is set in the rear placement On the groove 4-1-14, the bottom of the rear connecting frame 4-1-5 is connected to the rear slider 4-1-10 and two rear positioning pins 4-1-11. The rear placement groove 4-1-14 is machined with rear insertion holes 4-1-12 that correspond one-to-one with the rear positioning pins 4-1-11. The rear insertion holes 4-1-12 are elongated holes. The rear slider 4-1-10 slides with the rear slide rail 4-1-6. The rear support base 4-1-3 is provided with a rear limiting groove 4-1-13 that mates with the rear connecting frame 4-1-5. The rear first driving member 4-1-7 is connected to the rear connecting frame 4-1-5. The first driving component 4-1-7 drives the rear connecting frame 4-1-5 to reciprocate along the length of the rear slide rail 4-1-6. The second driving component 4-1-8 is connected to the rear connecting frame 4-1-5 through the rear control block 4-1-9. The two rear positioning pins 4-1-11 on the rear connecting frame 4-1-5 reciprocate up and down under the drive of the second driving component 4-1-8 and the rear control block 4-1-9 to insert into the rear insertion hole 4-1-12 to position the connector terminal continuous strip 20 or to disengage from the rear insertion hole 4-1-12 to release the connector terminal continuous strip 20.

[0062] The cutting machine 4-2 is mounted on the rear main support frame 4-1-1, and is located near the other end of the rear placement slot 4-1-14. The cutting machine 4-2 includes a drive cylinder 4-2-1, a vertical support frame 4-2-2, a guide bar 4-2-3, a cutter 4-2-4, and two strip-shaped support pieces 4-2-5. The vertical support frame 4-2-2 is vertically mounted on the rear main support frame 4-1-1. The guide bar 4-2-3 is located at the bottom of the rear main support frame 4-1-1. Two strip-shaped support pieces 4-2-5 are arranged side-by-side along the length of the top surface of the guide bar 4-2-3. A cutting groove is formed between the two strip-shaped support pieces 4-2-5 and the top surface of the guide bar 4-2-3. The cutting groove intersects with the rear limiting slot 4-1-1. The 13-connector configuration includes the bottoms of the front placement groove 3-14, the rear limiting groove 4-1-13, and the cutting groove on the same horizontal plane. The continuous connector terminal strip 20 is positioned between the front placement groove 3-14, the rear limiting groove 4-1-13, and the cutting groove. The drive cylinder 4-2-1 is positioned at the top of the vertical support frame 4-2-2, and the cutter 4-2-4 is positioned inside the vertical support frame 4-2-2. The upper end of the cutter 4-2-4 is connected to the telescopic end of the drive cylinder 4-2-1, and the lower end of the cutter 4-2-4 is positioned above the cutting groove. Under the drive of the drive cylinder 4-2-1, the cutter 4-2-4 performs a reciprocating lifting motion, either falling to cut the continuous connector terminal strip 20 or rising to reset. In this embodiment, the structure of the rear material pulling positioning machine 4-1 is consistent with that of the front material pulling positioning machine 3.

[0063] Specific implementation method seven: Combining Figures 1 to 18 This embodiment describes a non-coil direct-through cutting method for continuous strip material for connector terminals. This method is implemented using a non-coil direct-through cutting system. The non-coil direct-through cutting method enables a standardized process of injection molding, demolding, continuous conveying, and line cutting, forming a continuous straight-through flow. Specifically, the non-coil direct-through cutting system is first debugged to ensure that the outlet of the strip 2, the first inlet of the front puller positioning machine 3, the first outlet of the front puller positioning machine 3, the second inlet of the injection mold 6, the second outlet of the injection mold 6, and the third inlet of the rear puller cutting machine 4 are coaxially connected to form a coaxially arranged direct-through channel. The horizontal deviation of the direct-through channel is ensured to be ≤0.02mm / m, and the height difference between the lower mold outlet surface of the injection molding machine and the feed guide groove of the traction mechanism is ≤0.5mm. The continuous strip material 20 for connector terminals is then released from the strip 2 into the direct-through channel, ensuring that the suspended conveying stroke of the strip 2 under high temperature conditions is shortened as required.

[0064] Restart the rollless straight-through cutting system, ensuring that the roll 2, front pull positioning machine 3, rear pull cutting integrated machine 4, injection molding mechanism 5, and injection mold 6 are connected to the same PLC control system. The cycle time linkage coefficient ratio between the roll 2, front pull positioning machine 3, rear pull cutting integrated machine 4, injection molding mechanism 5, and injection mold 6 is 1:1:1:1:1, thereby achieving synchronous processing of the entire process of mold opening, traction feeding, and cutting actions in the rollless straight-through cutting system. The PLC control system is an existing control system, and the program it uses is an existing control program, which is specifically arranged on the workbench 1.

[0065] Specific Implementation Method Eight: This implementation method is a further limitation of Specific Implementation Method Seven. In this implementation method, the entire process of mold opening, traction feeding, and cutting in the non-coil direct-through cutting system is processed synchronously. After the continuous strip of connector terminals 20 is pulled out from the coil 2, it enters the front placement slot 3-14 of the front pulling and positioning machine 3. The front connecting frame 3-5, the front slide rail 3-6, the front first drive component 3-7, the front second drive component 3-8, the front control block 3-9, and the front slider 3-10 cooperate with each other to complete the process of the two front positioning pins 3-11 moving forward and falling to position the continuous strip of connector terminals 20. The feeding step is 14 to 18 positioning hole pitches on the continuous strip of connector terminals 20, and the step accuracy is ±0.01mm. This forms a process in which the two front positioning pins 3-11 continuously step towards the coil 2, driving the continuous strip of connector terminals 20 towards the injection mold 6.

[0066] After the material roll 2 and the front pull positioning machine 3 cooperate to complete the feeding, the two front positioning pins 3-11 disengage from the positioning holes on the connector terminal continuous material strip 20. The material roll 2 and the front pull positioning machine 3 are ready for the next cycle of material pulling. The pulling speed is matched with the injection cycle, which is 20~25s. The corresponding step pulling time is 0.5~1.0s, and the feeding acceleration is ≤50mm / s². This ensures that the connector terminal continuous material strip 20 is in a taut and stretched state, and is uniformly and stably conveyed horizontally and linearly to the injection mold 6 at the predetermined pulling speed.

[0067] The continuous strip of connector terminals 20 enters the mold. The upper module 6-2 performs rough positioning of the continuous strip of connector terminals 20. The upper module 6-2 uses the positioning pin plate 6-3 to precisely fix the continuous strip of connector terminals 20 between the front guide pressure seat 6-4, the lower module 6-1 and the rear guide pressure seat 6-5. Then the upper module 6-2 continues to fall to close the mold. The injection mechanism 5 injects the continuous strip of connector terminals 20 into the injection cavity. The injection temperature of the telescopic injection cylinder of the injection mechanism 5 is in the range of 290~330℃, the mold temperature is in the range of 100~130℃, the injection pressure is in the range of 80~120MPa, the holding pressure is in the range of 30~50MPa, and the cooling time is in the range of 3~8s. When the surface temperature of the continuous strip of connector terminals 20 in the injection cavity drops to 180~220℃, the mold can be opened.

[0068] The continuous strip of connector terminals 20 after injection molding is moved out of the injection mold 6 by the cooperation of the front pulling and positioning machine 3 and the rear pulling and positioning machine 4-1. After entering the rear limiting groove 4-1-13 in the integrated pulling and cutting machine 4 for positioning and correction, it is moved out and then cut by the rear cutting machine 4-2. The cutting force of 50~200N is configured according to the thickness range of 0.1~1mm of the continuous strip of connector terminals 20, so as to ensure that the continuous strip of connector terminals 20 is cut under the appropriate impact force.

[0069] While the cut single-segment connector terminal continuous strip 20 is being collected, the strip roll 2, the front pull positioning machine 3, the rear pull cutting integrated machine 4, the injection molding mechanism 5, and the injection mold 6 work together to enter the next injection molding cutting cycle process.

[0070] In practical use, the specific arrangement and positioning parameters of this invention can be as follows:

[0071] Part 1: The front placement slot 3-14 of the front guide rail strip 3-4, the outlet of the injection mechanism 5, the front guide pressure seat 6-4 of the injection mold 6, the rear guide pressure seat 6-5, the rear placement slot 4-1-14, and the cutting slot of the shearing machine 4-2 are arranged coaxially on the same horizontal straight line, with an overall horizontal deviation ≤0.02mm / m. The height difference between the material outlet surface of the lower module 6-1 and the third feed inlet of the rear material pulling and shearing integrated machine 4 is ≤0.5mm. The height difference between the cutting slot of the rear material pulling and shearing integrated machine 4 and the third feed inlet of the rear material pulling and shearing integrated machine 4 is ≤0.1mm. The positional configuration error between the rear positioning pin 4-1-11 and its corresponding rear insertion hole 4-1-12 is ≤0.01mm. The positional configuration error between the front positioning pin 3-11 and its corresponding front insertion hole 3-12 is ≤0.01mm. This completely avoids the situation of the continuous strip 20 of the connector terminal having a height difference, ensuring a precise and straight processing path.

[0072] Regarding the spacing parameter configuration, the straight-line distance from the outlet of the injection molding mechanism 5 to the third feed port of the back-pulling and shearing integrated machine 4 is ≤50mm, which shortens the suspended conveying stroke of the continuous material strip 20 of the connector terminal under high temperature conditions.

[0073] Part Two: Synchronous Parameter Calibration. The feeding cylinder of the material roll 2, the first front drive component 3-7 and the second front drive component 3-8 of the front pulling and positioning machine 3, the drive cylinder 4-2-1, and the injection mold 6 are all connected to the same PLC control system. The cycle linkage coefficient is set to 1:1:1:1 to realize the synchronous and coordinated processing of the entire process of mold opening, traction feeding, and cutting.

[0074] The continuous strip 20 of connector terminals is pulled out from the strip reel 2 and enters the front pull positioning machine 3. Inside the front pull positioning machine 3, the front positioning pin 3-11 passes through the positioning hole on the continuous strip 20 of connector terminals for positioning and drives the continuous strip 20 of connector terminals to move. The front first drive unit 3-7 and the front second drive unit 3 of the front pull positioning machine 3 work together to drive the front positioning pin 3-11 to insert into the continuous strip 20 of connector terminals to form a standardized stepping posture for feeding. The feeding step distance is equal to the pitch of 16 terminal strip positioning holes, and the step distance accuracy is set to ±0.01mm. After feeding is completed, the positioning pin disengages from the positioning hole of the material strip, and the feeding cylinder and positioning cylinder return to their original positions, ready for the next cycle of material pulling. The material pulling speed is matched with the injection cycle, which is 20~25s, corresponding to a stepping material pulling time of 0.5~1.0s. The feeding acceleration is ≤50mm / s² to prevent the material strip from stretching. During the material pulling process, the guide blocks on both sides of the material strip are automatically limited, with a gap of 0.05~0.1mm on each side to prevent the material strip from moving laterally. The material pulling speed is uniform and stable, without sudden stops or starts, ensuring that the material strip is conveyed horizontally and in a straight line throughout the entire process, without sagging, warping, or bending.

[0075] Part Three: Injection Molding Process Parameters, specifically the LCP plastic parameters:

[0076] The continuous connector terminal strip 20 is fed into the lower module 6-1 by the front guide pressure seat 6-4 on the side of the injection mold 6 via the front pull positioning machine 3. The front guide pressure seat 6-4 limits and coarsely positions the continuous connector terminal strip 20. The upper module 6-2 has a positioning pin plate 6-3 on its cavity surface. The positioning pin plate 6-3 is composed of pins with multiple rows of protrusions, which are used to pass through the positioning holes on the continuous connector terminal strip 20 and cooperate with the positioning holes on the cavity surface of the upper module 6-2 to connect the connector terminal strip 20. The connector terminal continuous strip 20 is clamped between the lower module 6-1 and the upper module 6-2, and the strip is precisely positioned. The injection mold 6 closes for injection molding. The injection material is LCP plastic. The injection barrel temperature of the injection molding mechanism 5 is 290~330℃, the mold temperature is 100~130℃, the injection pressure is 80~120MPa, the holding pressure is 30~50MPa, the cooling time is 3~8s, and the surface temperature of the product is reduced to 180~220℃ before mold opening to avoid excessive softening after demolding.

[0077] Part Four: Cutting Parameters Specifically: After the continuous connector terminal strip 20 is completed, it is fed into the rear pull material cutting machine 4 via the front pull positioning machine 3 connected to the rear pull material cutting machine 4. The pulling motion process in the rear pull material cutting machine 4 is consistent with the motion mode of the front pull positioning machine 3 before injection molding. The rear first drive component 4-1-7 and the rear second drive component 4-1-8 cooperate to drive the rear positioning pin 4-1-11 to position the positioning hole in the continuous connector terminal strip 20, and then the connector terminal strip... The continuous strip 20 moves synchronously with the stepping posture of the subsequent pull-out positioning machine 4-1, driving the cylinder 4-2-1 to move, which in turn drives the cutter 4-2-4 in the shearing machine 4-2 to fall synchronously for cutting. The cutting force of the cutter 4-2-4 is set according to the thickness range of 0.1~1mm of the continuous strip 20 for connector terminals, and the corresponding cutting force setting range is 50~200N, thus forming a standard cutting method adapted to the continuous strip 20 for connector terminals, avoiding excessive impact force that could cause deformation of the continuous strip 20 for connector terminals.

[0078] After cutting, the cut strip falls into the collection hopper 7, and each drive component resets to begin the next cycle of processing, thus achieving a continuous reciprocating processing process.

Claims

1. A roll-less straight-through cutting system for continuous strip of connector terminals, characterized in that: The system includes a workbench (1), a material roll (2), a front-pull positioning machine (3), a rear-pull cutting machine (4), an injection molding mechanism (5), and an injection mold (6). The workbench (1) is horizontally arranged. The material roll (2), the front-pull positioning machine (3), the injection mold (6), and the rear-pull cutting machine (4) are arranged sequentially on the workbench (1) along its length. The injection molding mechanism (5) is located above the injection mold (6). The outlet of the injection molding mechanism (5) faces the injection port of the injection mold (6). The outlet of the material roll (2) is coaxially arranged with the first inlet of the front-pull positioning machine (3). The first outlet of the front-pull positioning machine (3) is coaxially arranged with the second inlet of the injection mold (6). The second outlet of the injection mold (6) is coaxially arranged with the third inlet of the rear-pull cutting machine (4). The first feed port of the front feeding positioning machine (3), the first discharge port of the front feeding positioning machine (3), the second feed port of the injection mold (6), the second discharge port of the injection mold (6), and the third feed port of the rear feeding and cutting machine (4) are coaxially connected to form a straight channel for the continuous material strip (20) of the connector terminal; one end of the continuous material strip (20) of the connector terminal is set in the material roll (2), and the other end of the continuous material strip (20) of the connector terminal is sequentially passed between the front feeding positioning machine (3), the injection mold (6), and the rear feeding and cutting machine (4). The continuous material strip (20) of the connector terminal is in a straight pre-processing state in the front feeding positioning machine (3), the continuous material strip (20) of the connector terminal is in a plasticized and wrapped state in the injection mold (6), and the continuous material strip (20) of the connector terminal is in a plasticized and cut state in the rear feeding and cutting machine (4).

2. The roll-less straight-through cutting system for continuous strip of connector terminals according to claim 1, characterized in that: The front material positioning machine (3) includes a front main support frame (3-1), a front support base (3-2), a front side support seat (3-3), a front main guide rail (3-4), a front connecting frame (3-5), a front slide rail (3-6), a front first drive component (3-7), a front second drive component (3-8), a front control block (3-9), a front slider (3-10), and two front positioning pins (3-11). The front main support frame (3-1) is horizontally set on the workbench (1), and the front support base (3-2), the front slide rail (3-3), the front control block (3-9), the front slider (3-10), and two front positioning pins (3-11) are also included. The rail (3-6) and the front support base (3-3) are arranged side by side on the front main support frame (3-1). The front main guide rail strip (3-4) is provided on the front support base (3-2). The top surface of the front main guide rail strip (3-4) is machined with a front placement groove (3-14). The two ends of the front placement groove (3-14) are the first inlet and the first outlet, respectively. The connector terminal continuous strip (20) is set on the front placement groove (3-14). The bottom of the front connecting frame (3-5) is connected to the front slider (3-10). The front mounting slot (3-14) has two front positioning pins (3-11), and front insertion holes (3-12) are machined on the front mounting slot (3-14) to correspond one-to-one with the front positioning pins (3-11). The front insertion holes (3-12) are elongated holes. The front slider (3-10) slides with the front slide rail (3-6). The front support base (3-3) is provided with a front limiting groove (3-13) that mates with the front connecting frame (3-5). The front first drive member (3-7) is connected to the front connecting frame (3-5). The front first drive member (3-7) drives the front connecting frame (3-5) to move. 3-5) The front slide rail (3-6) makes a reciprocating sliding motion along its length. The front second drive unit (3-8) is connected to the front connecting frame (3-5) through the front control block (3-9). The two front positioning pins (3-11) on the front connecting frame (3-5) make a reciprocating lifting motion under the drive of the front second drive unit (3-8) and the front control block (3-9) to insert into the front insertion hole (3-12) to position the continuous strip of connector terminal (20) or to disengage from the front insertion hole (3-12) to release the continuous strip of connector terminal (20).

3. The roll-less straight-through cutting system for continuous strip of connector terminals according to claim 2, characterized in that: The front connecting frame (3-5) includes a horizontal front connecting frame (3-5-1), a connecting block (3-5-2), and a vertical front connecting frame (3-5-3). The horizontal front connecting frame (3-5-1) is connected to the connecting block (3-5-2). The bottom of the horizontal front connecting frame (3-5-1) is connected to the front slider (3-10). The bottom of the vertical front connecting frame (3-5-3) is provided with two front positioning pins (3-11) arranged side by side. The front connecting frame (3-5-3) includes a connecting post (3-5-3-1) and a U-shaped frame (3-5-3-2). The two ends of the connecting post (3-5-3-1) are fixedly connected to the U-shaped frame (3-5-3-2) as a single unit. The connecting post (3-5-3-1) passes through the connecting block (3-5-2), and the connecting post (3-5-3-1) slides back and forth along the height direction of the connecting block (3-5-2). -2) The front control block (3-9) has a long hole machined on it to mate with the connecting post (3-5-3-1). The front control block (3-9) includes a rectangular block (3-9-1) and a limiting post (3-9-2). The rectangular block (3-9-1) has an inclined hole (3-9-3) machined along its thickness direction. One end of the limiting post (3-9-2) passes through the inclined hole (3-9-3), and the other end of the limiting post (3-9-2) passes through the long hole to mate with the connecting post (3-5-3-1). 1) When the current control block (3-9) slides horizontally along the length of the connecting block (3-5-2) under the drive of the front second drive member (3-8), the connecting column (3-5-3-1) moves vertically up and down under the cooperation of the front control block (3-9) and the front second drive member (3-8), and the two front positioning pins (3-11) move vertically up and down synchronously under the drive of the connecting column (3-5-3-1).

4. The roll-less straight-through cutting system for continuous strip of connector terminals according to claim 1, characterized in that: The injection mold (6) includes a lower module (6-1), an upper module (6-2), a positioning pin plate (6-3), a front guide pressure plate (6-4), a rear guide pressure plate (6-5), and a lifting control assembly. The lower module (6-1) has a front guide pressure plate (6-4) and a rear guide pressure plate (6-5) at its two ends respectively. The connector terminal continuous strip (20) is disposed between the front guide pressure plate (6-4), the lower module (6-1), and the rear guide pressure plate (6-5). The upper module (6-2) is disposed above the lower module (6-1). An injection cavity is formed between the upper module (6-2) and the lower module (6-1). The upper module (6-2) is connected to the lower module (6-1) via the lifting control assembly. A positioning pin plate (6-3) is disposed on the bottom surface of the upper module (6-2). The positioning pin plate (6-3) includes a plate body (6-3-1) and two... Two rows of front positioning pins (6-3-2) are arranged side by side on the bottom surface of the plate body (6-3-1) along the length direction of the connector terminal continuous strip (20). The positioning pin plate (6-3) moves back and forth under the drive of the lifting and positioning component, either lowering to position the connector terminal continuous strip (20) or raising to release the connector terminal continuous strip (20). When the injection mold (6) is in the mold closed state, the upper module (6-2) is close to the lower module (6-1), and the positioning pin plate (6-3) is in the state of lowering to position the connector terminal continuous strip (20) under the drive of the lifting and positioning component. When the injection mold (6) is in the mold open state, the upper module (6-2) and the lower module (6-1) are in the state of separation, and the positioning pin plate (6-3) is in the state of raising to release the connector terminal continuous strip (20) under the drive of the lifting and positioning component.

5. The roll-less straight-through cutting system for continuous strip of connector terminals according to claim 4, characterized in that: The structure of the front guide pressure platen (6-4) is the same as that of the rear guide pressure platen (6-5). The front guide pressure platen (6-4) includes a base (6-4-1) and two upper clamping blocks (6-4-2). One side of the base (6-4-1) is fixedly connected to the lower module (6-1). The top surface of the base (6-4-1) is flush with the top surface of the lower module (6-1). A groove (6-4-3) is machined on the base (6-4-1), and the groove (6-4-3) communicates with the injection cavity. The two upper clamping blocks (6-4-2) are connected to the injection cavity. -2) Vertically arranged side by side on the base (6-4-1), each upper locking block (6-4-2) has a notch (6-4-4) machined at the bottom, the bottom of each upper locking block (6-4-2) is engaged with the base (6-4-1), a positioning gap (6-4-6) is formed between each notch (6-4-4) and the base (6-4-1) for the mating connector terminal continuous strip (20), and a top operating gap (6-4-5) is formed between two upper locking blocks (6-4-2) for the mating connector terminal continuous strip (20).

6. The roll-less straight-through cutting system for continuous strip of connector terminals according to claim 4, characterized in that: The injection mechanism (5) is an injection mechanism with a telescopic injection cylinder, and the telescopic injection cylinder of the injection mechanism (5) is connected to the injection cavity.

7. The roll-less straight-through cutting system for continuous strip of connector terminals according to claim 2, 3, 4, 5 or 6, characterized in that: The rear-pull material cutting integrated machine (4) includes a rear-pull material positioning machine (4-1) and a cutting machine (4-2). The rear-pull material positioning machine (4-1) includes a rear main support frame (4-1-1), a rear support base (4-1-2), a rear side support seat (4-1-3), a rear main guide rail (4-1-4), a rear connecting frame (4-1-5), a rear slide rail (4-1-6), a rear first drive component (4-1-7), a rear second drive component (4-1-8), a rear control block (4-1-9), a rear slider (4-1-14), and two rear positioning pins (4-1-11). The rear main support frame (4-1-1) is water The rear support base (4-1-2), rear slide rail (4-1-6), and rear side support (4-1-3) are arranged side by side on the rear main support frame (4-1-1). The rear support base (4-1-2) is provided with a rear main guide rail (4-1-4). The top surface of the rear main guide rail (4-1-4) is machined with a rear placement groove (4-1-14). The end of the rear placement groove (4-1-14) facing the injection mold (6) is the third feed port. The connector terminal continuous strip (20) is arranged on the rear placement groove (4-1-14). The rear connecting frame (4-1-5) The bottom is connected to a rear slider (4-1-14) and two rear positioning pins (4-1-11). The rear placement groove (4-1-14) has rear insertion holes (4-1-12) that correspond one-to-one with the rear positioning pins (4-1-11). The rear insertion holes (4-1-12) are elongated holes. The rear slider (4-1-14) slides with the rear slide rail (4-1-6). The rear support base (4-1-3) has a rear limiting groove (4-1-13) that mates with the rear connecting frame (4-1-5). The rear first driving component (4-1-7) is connected to the rear connecting frame (4-1-5). 1-7) Drive the rear connecting frame (4-1-5) to make a reciprocating sliding motion along the length direction of the rear slide rail (4-1-6). The rear second drive unit (4-1-8) is connected to the rear connecting frame (4-1-5) through the rear control block (4-1-9). The two rear positioning pins (4-1-11) on the rear connecting frame (4-1-5) make a reciprocating lifting motion under the drive of the rear second drive unit (4-1-8) and the rear control block (4-1-9) to insert into the rear insertion hole (4-1-12) to position the connector terminal continuous strip (20) or to disengage from the rear insertion hole (4-1-12) to release the connector terminal continuous strip (20). The cutting machine (4-2) is mounted on the rear main support frame (4-1-1). The cutting machine (4-2) is located near the other end of the rear placement slot (4-1-14). The cutting machine (4-2) includes a drive cylinder (4-2-1), a vertical support frame (4-2-2), a guide bar (4-2-3), a cutter (4-2-4), and two strip-shaped support pieces (4-2-5). The vertical support frame (4-2-2) is vertically mounted on the rear main support frame (4-1-1). The guide bar (4-2-3) is located at the bottom of the rear main support frame (4-1-1). Two strip-shaped support pieces (4-2-5) are arranged side by side along the length of the top surface of the guide bar (4-2-3). A cutting groove is formed between the two strip-shaped support pieces (4-2-5) and the top surface of the guide bar (4-2-3). The cutting groove and the rear limiting slot (4-1-14) are connected. -1-13) are connected and arranged in a manner such that the bottom of the front placement groove (3-14), the bottom of the rear limiting groove (4-1-13), and the bottom of the cutting groove are on the same horizontal plane. The continuous strip of connector terminals (20) is arranged between the front placement groove (3-14), the rear limiting groove (4-1-13), and the cutting groove. The driving cylinder (4-2-1) is arranged on the top of the vertical support frame (4-2-2). The cutter (4-2-4) is arranged inside the vertical support frame (4-2-2). The upper end of the cutter (4-2-4) is connected to the telescopic end of the driving cylinder (4-2-1). The lower end of the cutter (4-2-4) is arranged above the cutting groove. The cutter (4-2-4) makes a reciprocating lifting motion of falling to cut the continuous strip of connector terminals (20) or rising to reset under the drive of the driving cylinder (4-2-1).

8. A method for non-coil straight-through cutting of continuous strip for connector terminals, implemented using the non-coil straight-through cutting system for continuous strip for connector terminals as described in any one of claims 1 to 7, characterized in that: Debug the non-rolled material straight-through cutting system to ensure that the material roll (2) outlet, the first feed port of the front pull material positioning machine (3), the first discharge port of the front pull material positioning machine (3), the second feed port of the injection mold (6), the second discharge port of the injection mold (6) and the third feed port of the rear pull material cutting machine (4) are coaxially connected to form a straight-through channel arranged in a coaxial manner. Ensure that the horizontal deviation of the straight-through channel is ≤0.02mm / m, and the height difference between the lower mold discharge surface of the injection molding machine and the feed guide groove of the traction mechanism is ≤0.5mm. Release the continuous material strip (20) of the connector terminal from the material roll (2) into the straight-through channel to ensure that the suspended conveying stroke of the material roll (2) in the high temperature state is shortened as required. Start the no-roll material straight-through cutting system and ensure that the material roll (2), front pull material positioning machine (3), rear pull material cutting integrated machine (4), injection molding mechanism (5) and injection mold (6) are connected to the same PLC control system. The cycle linkage coefficient ratio between the material roll (2), front pull material positioning machine (3), rear pull material cutting integrated machine (4), injection molding mechanism (5) and injection mold (6) is 1:1:1:1:1, thereby realizing the synchronous processing of the entire process of mold opening, traction feeding and cutting action in the no-roll material straight-through cutting system.

9. The method for non-coil straight-through cutting of continuous strip for connector terminals according to claim 8, characterized in that: In the no-roll material straight-through cutting system, the entire process of mold opening, traction feeding and cutting is synchronized. After the connector terminal continuous strip (20) is pulled out from the material roll (2), it enters the front placement slot (3-14) of the front material pulling positioning machine (3). The front connecting frame (3-5), the front slide rail (3-6), the front first drive (3-7), the front second drive (3-8), the front control block (3-9) and the front slider (3-10) cooperate with each other to complete the process of the two front positioning pins (3-11) moving forward and falling to position the connector terminal continuous strip (20). The feeding step is 14~18 positioning hole pitches on the connector terminal continuous strip (20), and the step accuracy is ±0.01mm. This forms the process of the two front positioning pins (3-11) continuously stepping towards the material roll (2) to drive the connector terminal continuous strip (20) towards the injection mold (6). After the material roll (2) and the front pull positioning machine (3) work together to complete the feeding, the two front positioning pins (3-11) disengage from the positioning holes on the connector terminal continuous material strip (20). The material roll (2) and the front pull positioning machine (3) are ready to pull the material in the next cycle. The pulling speed matches the injection cycle. The injection cycle is 20~25s, corresponding to a step pulling time of 0.5~1.0s. The feeding acceleration is ≤50mm / s², thereby ensuring that the connector terminal continuous material strip (20) is in a taut and stretched state and is conveyed to the injection mold (6) at a uniform and stable horizontal straight speed at the predetermined pulling speed. The connector terminal continuous strip (20) enters the mold. The upper module (6-2) performs rough positioning of the connector terminal continuous strip (20). The upper module (6-2) uses the positioning pin plate (6-3) to precisely fix the connector terminal continuous strip (20) between the front guide pressure seat (6-4), the lower module (6-1), and the rear guide pressure seat (6-5). Then, the upper module (6-2) continues to fall to close the mold. The injection molding mechanism (5) clamps the connector terminal continuous strip. Injection is performed in the injection cavity with (20). The injection temperature of the telescopic injection cylinder of the injection mechanism (5) is 290~330℃, the mold temperature is 100~130℃, the injection pressure is 80~120MPa, the holding pressure is 30~50MPa, and the cooling time is 3~8s. The mold can be opened when the surface temperature of the continuous strip (20) of the connector terminal in the injection cavity drops to 180~220℃. The continuous strip of connector terminals (20) after injection molding is moved out of the injection mold (6) by the cooperation of the front pulling positioning machine (3) and the rear pulling positioning machine (4-1). After being positioned and corrected in the rear limiting groove (4-1-13) of the pulling and cutting integrated machine (4), it is moved out of the rear cutting machine (4-2) for cutting. The cutting force of 50~200N is configured according to the thickness range of 0.1~1mm of the continuous strip of connector terminals (20) to ensure that the continuous strip of connector terminals (20) is cut under the appropriate impact force. While the cut single-segment connector terminal continuous strip (20) is collected, the strip roll (2), the front pull positioning machine (3), the rear pull cutting machine (4), the injection molding mechanism (5) and the injection mold (6) work together to enter the next injection molding cutting cycle process.

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