An injection molding process for automobile wiring harness production

Abstract

The present invention relates to the field of wire harness processing technology, specifically to an injection molding process for automobile wire harness production, which is completed by an injection molding device for automobile wire harness production. The injection molding device includes a device frame, a wire straightening mechanism for straightening connecting wires is arranged in the middle of the inner side of the device frame, a wire pulling mechanism for pulling the wire harness is arranged on the left side of the inner side of the device frame, and an injection molding mechanism for injection molding is arranged on the device frame. The present invention adopts a moving component to drive a wire straightening roller to move to the left along the connecting wire through the moving frame, so that the wire straightening roller can pull multiple connecting wires of the wire harness straight, and when the moving frame moves to the left, it can also cooperate with the pulling component to move the wire harness to the left, so that the connecting wire remains in a straight state, and then the wire harness is fixed by the wire clamping component, thereby avoiding the bending of the connecting wire in the injection-molded connector during injection molding, thereby ensuring the quality of the wire harness.

Description

Technical Field

[0001] The invention relates to the technical field of wire harness processing, in particular to an injection molding process for producing automobile wire harnesses. Background Art

[0002] Automotive wiring harness injection molding refers to the process of wrapping multiple wires, cables, connectors and other components in the automotive wiring harness with plastic to form an integral component. For environmental protection and economy, the injection molding raw materials usually contain recycled plastic particles.

[0003] At present, when injection molding a connector for a strand of automotive wiring harness with multiple connecting wires, the multiple connecting terminals in a strand of wiring harness are usually manually inserted into the clamping block, and then the clamping block and the wiring harness are placed in an injection molding machine. A mold cover is set at the end of the wiring harness and the outside of the multiple connecting wires of the wiring harness, and then a high-temperature and high-pressure connector injection molding material is injected into the mold, so that the injection molding material is formed into a connector at the end of the wiring harness inside the mold.

[0004] However, when this method is used for injection molding of a wiring harness with multiple connecting terminals, it cannot ensure that the connecting wires of each terminal are straight. As a result, during injection molding, the high-temperature and high-pressure connector material will impact the connecting wires of the connecting terminals, causing the connecting wires of the connecting terminals to bend inside the injection-molded connector, thereby affecting the transmission performance of the connecting wires and further affecting the quality of the wiring harness. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an injection molding process for automobile wiring harness production, comprising the following steps: S1, using a clamping block to fix the positions of multiple connection terminals of the wiring harness, and then placing the clamping block inside the injection molding device.

[0006] S2. Synchronously pull the multiple connecting wires of the wire harness so that the multiple connecting wires of the wire harness are arranged straight.

[0007] S3. Pull the wire harness, and then lock the wire harness so that multiple connecting wires of the wire harness remain straight.

[0008] S4. The mold cover is arranged on the outside of the wire harness, and high-temperature and high-pressure raw materials are injected to complete the injection molding of the wire harness connector.

[0009] Step S2 and step S4 are completed by using an injection molding device for automobile wire harness production. The injection molding device includes a device frame, a wire straightening mechanism for straightening the connecting wires is arranged in the middle of the inner side of the device frame, a wire pulling mechanism for pulling the wire harness is arranged on the left side of the inner side of the device frame, and an injection molding mechanism for injection molding is arranged on the device frame.

[0010] The wire-winding mechanism includes a moving frame which is slidably arranged inside the device frame along the left and right directions, the moving frame is provided with rotating disks which are rotatably arranged at equal intervals along its circumference, a moving plate is connected to the rotating disk in a radial sliding manner along the moving frame, a sliding block is provided on the side of the moving plate close to the center of the moving frame which is slidably arranged along the length direction of the moving plate, a wire-winding roller is rotatably arranged on the side of the moving plate close to the center of the moving frame and on the corresponding side of the sliding block, the wire-winding roller is provided with an anti-falling component which prevents the connecting line from falling off, the moving frame is provided with a rotating component which drives all the rotating disks to rotate, and the device frame is provided with a moving component which drives the moving frame to move.

[0011] The wire pulling mechanism includes a lower closing block fixedly installed on the upper bottom side of the device frame, an upper closing block slidingly arranged on the lower top side of the device frame in the vertical direction, semicircular grooves are provided on the upper part of the lower closing block and the lower part of the upper closing block, a wire clamping assembly is commonly arranged inside the lower closing block and the upper closing block, and a pulling assembly is commonly arranged on the lower closing block and the upper closing block.

[0012] As a preferred technical solution of the present invention, the anti-slip assembly includes anti-slip square rods which are arranged at equal intervals along the circumference of the wire-drawing roller on one side of the movable plate away from the corresponding position, the anti-slip square rods are slidably connected to the wire-drawing roller along the radial direction, a push-pull member is arranged inside the wire-drawing roller along its axial sliding direction, one end of the push-pull member close to the anti-slip square rod is hinged to the corresponding anti-slip square rod on the same wire-drawing roller through a connecting plate, a driving part for driving the push-pull member to move is arranged on the movable plate, and an active spring is arranged between the sliding block and the movable plate.

[0013] As a preferred technical solution of the present invention, the driving part includes an active plate which slides along the thickness direction of the movable plate on the side away from the wire drawing roller, and a follower block is provided on the side of the active plate close to the center of the movable frame to slide along the length direction of the active plate, and the follower block and the side of the active plate close to the center of the movable frame are respectively rotatably connected with the push-pull members at corresponding positions, a raised column is provided on the right side of the active plate away from the center of the movable frame, a right-angled triangle plate is fixedly installed on the side of the rotating disk away from the center of the movable frame, and a return spring is provided between the push-pull member and the wire drawing roller.

[0014] As a preferred technical solution of the present invention, the rotating assembly includes a driving column rotatably arranged on the left side of the rotating disk away from the center of the moving frame, and all the driving columns are fixedly connected with a steel wire rope, and the steel wire rope is a closed-loop structure. A moving frame is provided on the upper middle side of the moving frame to slide along the front and rear directions through a No. 1 electric push rod, and a pulling block is provided inside the moving frame to slide along the left and right directions. The pulling block is fixedly connected to the steel wire rope, and a limiting portion is provided on the moving frame.

[0015] As a preferred technical solution of the present invention, the limiting portion includes limiting grooves arranged at equal intervals along the circumference of the movable frame, the limiting grooves correspond one-to-one to the positions of the rotating disk, and a limiting block is fixedly installed on the right side of the cylindrical surface of the rotating disk, and the limiting block slides inside the limiting groove.

[0016] As a preferred technical solution of the present invention, the moving assembly includes a threaded rod rotatably arranged on the upper bottom side of the device frame, the threaded rod is threadedly connected to the moving frame, an actuator motor is fixedly installed on the left side of the device frame, the output shaft of the actuator motor is fixedly connected to the threaded rod, and a coil spring is arranged between the moving plate and the rotating disk to push the moving plate away from the center of the moving frame.

[0017] As a preferred technical solution of the present invention, the wire clamping assembly includes clamping blocks respectively slidably arranged inside the lower closing block and the upper closing block along the vertical direction, the clamping blocks inside the lower closing block and the upper closing block are arranged symmetrically with each other, active springs are arranged between the lower closing block, the upper closing block and the clamping blocks at corresponding positions, an extrusion piece is slidably arranged on the side of the two clamping blocks away from each other, an inclined surface is arranged on the side of the extrusion piece away from the clamping block, a compression spring is arranged between the extrusion piece and the clamping block, a No. 1 hydraulic rod is fixedly installed on the upper part of the device frame, and the telescopic section of the No. 1 hydraulic rod is fixedly connected to the upper closing block.

[0018] As a preferred technical solution of the present invention, the pulling assembly includes pulling plates respectively arranged on the left side of the lower closing block and the upper closing block for sliding left and right through guide tubes, and rotating parts are rotatably arranged on the sides of the two pulling plates close to each other, the left side of the rotating part is semi-elliptical and the right side is semi-circular, a No. 2 hydraulic rod is fixedly installed on the inner side of the rotating part, a resetting part for resetting the rotating part is arranged on the upper pulling plate, abutment springs are arranged between the lower closing block, the upper closing block and the guide tubes at corresponding positions, a push rod is arranged inside the guide tube for sliding along the left and right directions, and a push spring is arranged between the push rod and the guide tube.

[0019] As a preferred technical solution of the present invention, the reset part includes an abutment plate slidably arranged in the vertical direction on the left side of the upper pulling plate, a No. 2 electric push rod is fixedly installed on the upper part of the upper pulling plate, and the telescopic section of the No. 2 electric push rod is fixedly connected to the abutment plate.

[0020] As a preferred technical solution of the present invention, the injection molding mechanism includes a clamping plate arranged on the right side of the device frame by plugging, a rectangular groove for inserting the clamping plate is opened on the right side of the device frame, a feed pipe is fixedly installed on the right side of the clamping plate, molds are symmetrically arranged on the device frame front and back, the molds are slidably connected to the device frame along the front and back directions through guide columns, and a No. 3 hydraulic rod is fixedly installed on the device frame front and back symmetrically, and the telescopic section of the No. 3 hydraulic rod is fixedly connected to the mold at the corresponding position.

[0021] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0022] 1. The present invention adopts a moving component to drive the wire drawing roller to move to the left along the connecting line through the moving frame, so that the wire drawing roller can pull the multiple connecting lines of the wire harness straight, and when the moving frame moves to the left, it can also cooperate with the pulling component to move the wire harness to the left, so that the connecting line remains in a straight state, and then the wire harness is fixed by the wire clamping component, thereby avoiding the connecting line from bending in the injection-molded connector during injection molding, thereby ensuring the quality of the wire harness.

[0023] 2. The present invention adopts an anti-slip assembly to stably enable the wire-slip roller to smooth the connecting wire, prevent the connecting wire from falling off the wire-slip roller, and ensure that the wire-slip roller smoothes the connecting wire successfully at one time, thereby ensuring the smoothing effect of the wire-slip roller on the connecting wire.

[0024] 3. The present invention uses a rotating component and an anti-detachment component to automatically detach the wire drawing roller from the connecting line when the moving frame moves to a position where the wire harness does not need to be injected, thereby preventing the wire harness from hindering the moving frame from driving the wire drawing roller to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a process flow chart of the present invention.

[0026] Figure 2 It is a schematic diagram of the overall structure of the injection molding device provided in an embodiment of the present invention.

[0027] Figure 3 It is a cross-sectional view of a device frame and an injection molding mechanism in an injection molding device provided in an embodiment of the present invention.

[0028] Figure 4 It is a schematic structural diagram of the wire-winding mechanism in the injection molding device provided in an embodiment of the present invention after removing the moving components.

[0029] Figure 5 It is a schematic structural diagram of a rotating disk, a moving plate, a sliding block, a wire drawing roller and an anti-slip assembly in an injection molding device provided in an embodiment of the present invention.

[0030] Figure 6 It is a cross-sectional view of a wire drawing roller, an anti-slip square rod, a push-pull member and a connecting plate in an injection molding device provided in an embodiment of the present invention.

[0031] Figure 7 It is a partial structural schematic diagram of a moving frame, a rotating disk and a rotating assembly in an injection molding device provided in an embodiment of the present invention.

[0032] Figure 8 It is a cross-sectional view of the wire pulling mechanism in the injection molding device provided by an embodiment of the present invention after removing the No. 1 hydraulic rod.

[0033] Fig. 9It is a cross-sectional view of a pulling assembly in an injection molding device provided in an embodiment of the present invention.

[0034] In the figure: 1. device frame; 2. wire drawing mechanism; 3. wire pulling mechanism; 4. injection molding mechanism; 21. moving frame; 22. rotating disk; 23. moving plate; 24. sliding block; 25. wire drawing roller; 26. anti-slip assembly; 27. rotating assembly; 28. moving assembly; 31. lower closing block; 32. upper closing block; 33. wire clamping assembly; 34. pulling assembly; 41. clamping plate; 42. feeding pipe; 43. mold; 44. No. 3 hydraulic rod; 261. anti-slip square rod; 262. push-pull member; 263. connecting plate; 264. driving part; 271. driving column; 272. wire rope ; 273, No. 1 electric push rod; 274, moving frame; 275, pulling block; 276, limiting part; 281, threaded rod; 282, executive motor; 331, clamping block; 332, No. 1 hydraulic rod; 333, extrusion piece; 341, pulling plate; 342, rotating piece; 343, No. 2 hydraulic rod; 344, reset part; 345, pushing rod; 346, guide tube; 2641, active plate; 2642, follower block; 2643, right-angle triangle plate; 2761, limiting groove; 2762, limiting block; 3441, abutment plate; 3442, No. 2 electric push rod. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] See also Figure 1 , an injection molding process for automobile wiring harness production, comprising the following steps:

[0037] S1. Use a clamping block to fix the positions of multiple connection terminals of the wiring harness, and then place the clamping block inside the injection molding device.

[0038] S2. Synchronously pull the multiple connecting wires of the wire harness so that the multiple connecting wires of the wire harness are arranged straight.

[0039] S3. Pull the wire harness, and then lock the wire harness so that multiple connecting wires of the wire harness remain straight.

[0040] S4, the mold 43 is placed on the outside of the wire harness, and high-temperature and high-pressure raw materials are injected to complete the injection molding of the wire harness connector.

[0041] Among them, step S2 and step S4 are completed by using an injection molding device for automobile wiring harness production, see Figure 2 , Figure 3 , Figure 4 and Figure 8 The injection molding device includes a device frame 1, a wire straightening mechanism 2 for straightening the connecting wire is arranged in the middle of the inner side of the device frame 1, a wire pulling mechanism 3 for pulling the wire harness is arranged on the left side of the inner side of the device frame 1, and an injection molding mechanism 4 for injection molding is arranged on the device frame 1.

[0042] When the automobile wiring harness needs to be injection molded, firstly, the multiple connecting wires of the wiring harness are placed inside the device frame 1 through the injection molding mechanism 4, and then the multiple connecting wires of the wiring harness are straightened from right to left through the wire straightening mechanism 2, and then the wire pulling mechanism 3 pulls the wiring harness to the left side, so that the wiring harness drives the connecting wires to be tightened, and then the wire pulling mechanism 3 fixes the position of the wiring harness, and then the injection molding mechanism 4 is used again to inject the connector on the outside of the connecting wire of the wiring harness.

[0043] See also Figure 2 and Figure 3 The injection molding mechanism 4 includes a clamping plate 41 which is arranged on the right side of the device frame 1 by plugging. A rectangular groove for inserting the clamping plate 41 is opened on the right side of the device frame 1. The rectangular groove is not shown in the figure. A feed pipe 42 is fixedly installed on the right side of the clamping plate 41. The device frame 1 is symmetrically provided with molds 43 in the front and back directions. The molds 43 are slidably connected to the device frame 1 along the front and back directions through guide columns. A No. 3 hydraulic rod 44 is fixedly installed on the device frame 1 in the front and back directions. The telescopic section of the No. 3 hydraulic rod 44 is fixedly connected to the mold 43 at the corresponding position.

[0044] See also Figure 2 , Figure 4 and Figure 5 The wire-winding mechanism 2 includes a moving frame 21 which is slidably arranged inside the device frame 1 along the left and right directions. The center position of the moving frame 21 is a main structure. Ear plates are arranged on the upper and lower sides of the main structure of the moving frame 21. The moving frame 21 is slidably connected to the device frame 1 through the ear plates on the upper and lower sides. The left and right sides of the main structure of the moving frame 21 form circular plate structures, and the middle part of the main structure of the moving frame 21 forms a rectangular plate structure. A rectangular hole running through the center of the main structure of the moving frame 21 is provided.

[0045] A rotating disk 22 is rotatably arranged at equal intervals along the circumference of the circular plate on the rectangular plate of the movable frame 21, a movable plate 23 is slidably connected to the rotating disk 22 along the radial direction of the circular plate of the movable frame 21, a sliding block 24 is slidably arranged along the length direction of the movable plate 23 on the side of the movable plate 23 close to the center of the movable frame 21, a wire drawing roller 25 is rotatably arranged on the side of the movable plate 23 close to the center of the movable frame 21 and the corresponding side of the sliding block 24, an active spring is arranged between the sliding block 24 and the movable plate 23, and a coil spring is arranged between the movable plate 23 and the rotating disk 22 to push the movable plate 23 away from the center of the movable frame 21.

[0046] In the initial state, the movable frame 21 is located on the left side of the device frame 1, and the right side surface of the device frame 1 is located at the position where the bonding clamping plate 41 is installed. The telescopic section of the No. 3 hydraulic rod 44 is in a retracted state, so that the No. 3 hydraulic rod 44 drives the mold 43 to be in a state of being away from each other. The rotating disk 22 drives the wire drawing roller 25 through the movable plate 23, so that the axis of the wire drawing roller 25 is parallel to the left side surface of the movable frame 21 in the initial state. The coil spring pushes the movable plate 23 through its own elastic force, so that the movable plate 23 drives the wire drawing roller 25 to be in a position away from the middle of the movable frame 21.

[0047] When the wiring harness needs to be injection molded, the operator first passes the connection terminals of the multiple connecting wires of the wiring harness through the interior of the movable frame 21 and inserts them into the interior of the clamping plate 41. Then the operator inserts the clamping plate 41 into the plug-in position on the right side of the device frame 1, so that the clamping plate 41 is fixedly connected to the device frame 1, and at this time, the left side of the clamping plate 41 is abutted against the right side of the movable frame 21.

[0048] See also Figure 2 and Figure 8 The wire pulling mechanism 3 includes a lower closing block 31 fixedly mounted on the upper bottom side of the device frame 1, an upper closing block 32 is slidably arranged along the vertical direction on the lower top side of the device frame 1, and semicircular grooves are provided on the upper part of the lower closing block 31 and the lower part of the upper closing block 32, and a wire clamping assembly 33 is commonly arranged inside the lower closing block 31 and the upper closing block 32.

[0049] It should be noted that a lower engaging block 31 is fixedly mounted on the upper side of the bottom of the device frame 1 via a rectangular supporting plate.

[0050] Continue reading Figure 2 and Figure 8The wire clamping assembly 33 includes clamping blocks 331 respectively slidably arranged in the lower closing block 31 and the upper closing block 32 along the vertical direction, the clamping blocks 331 in the lower closing block 31 and the upper closing block 32 are arranged symmetrically with each other, and active springs are arranged between the lower closing block 31, the upper closing block 32 and the clamping blocks 331 at corresponding positions, and an extrusion piece 333 is slidably arranged on the side where the two clamping blocks 331 are away from each other, and an inclined surface is arranged on the side where the extrusion piece 333 is away from the clamping block 331, and a compression spring is arranged between the extrusion piece 333 and the clamping block 331, and the elastic force of the compression spring is greater than that of the active spring, and a No. 1 hydraulic rod 332 is fixedly installed on the upper part of the device frame 1, and the telescopic section of the No. 1 hydraulic rod 332 is fixedly connected to the upper closing block 32.

[0051] In the initial state, the telescopic section of the No. 1 hydraulic rod 332 is in a retracted state, so that the telescopic section of the No. 1 hydraulic rod 332 drives the upper closing block 32 to be located at an upper position where it does not contact the lower closing block 31. At the same time, the two active springs push the clamping blocks 331 at the corresponding positions to move away from each other through their own elastic force. When the clamping plate 41 is fixed on the device frame 1, the operator places the wiring harness inside the semicircular groove of the lower closing block 31.

[0052] Then, the telescopic section of the No. 1 hydraulic rod 332 is extended to drive the upper block 32 to move downward to form a combination with the lower block 31, so that the semicircular grooves on the upper block 32 and the lower block 31 are combined into a circular through groove, so that the wiring harness is limited inside the circular through groove formed by the upper block 32 and the lower block 31.

[0053] Then the operator places the connecting wires of the wire harness between the two wire drawing rollers 25 at the corresponding positions respectively, and the active spring pushes the sliding block 24 to move toward the center of the movable frame 21 through its own elastic force, so that the sliding block 24 drives the wire drawing roller 25 thereon to push the connecting wire against the wire drawing roller 25 of the movable plate 23, so that the two wire drawing rollers 25 clamp the connecting wire to a limited position, making the two wire drawing rollers 25 clamp the connecting wire more stably, and the spiral spring drives the wire drawing roller 25 on the movable plate 23 to pull the connecting wire in the direction away from the center of the movable frame 21.

[0054] See also Figure 4 , Figure 5 and Figure 6 The wire-spooling mechanism 2 also includes an anti-slip assembly 26 arranged on the wire-spooling roller 25. The anti-slip assembly 26 includes anti-slip square rods 261 arranged at equal intervals along the circumference of the wire-spooling roller 25 on one side of the movable plate 23 away from the corresponding position. The anti-slip square rods 261 are slidably connected to the wire-spooling roller 25 along the radial direction. A push-pull member 262 is provided inside the wire-spooling roller 25 along its axial sliding direction. One end of the push-pull member 262 close to the anti-slip square rod 261 is hinged to the corresponding anti-slip square rod 261 on the same wire-spooling roller 25 through a connecting plate 263. A return spring is provided between the push-pull member 262 and the wire-spooling roller 25.

[0055] In the initial state, the return spring pushes the push-pull member 262 to move away from the movable plate 23 through its own elastic force, so that the push-pull member 262 pushes the corresponding anti-slip square rod 261 on the same wire-winding roller 25 through the connecting plate 263 to extend to the outside of the cylindrical surface of the wire-winding roller 25. When the connecting line is clamped between the two wire-winding rollers 25, the anti-slip square rod 261 blocks the side of the wire-winding roller 25 away from the movable plate 23, thereby preventing the connecting line from slipping off the wire-winding roller 25.

[0056] See also Figure 2 and Figure 4 The wire-winding mechanism 2 also includes a moving component 28 arranged on the device frame 1. The moving component 28 includes a threaded rod 281 rotatably arranged on the upper bottom side of the device frame 1. The threaded rod 281 is threadedly connected to the moving frame 21. An actuator motor 282 is fixedly installed on the left side of the device frame 1. The output shaft of the actuator motor 282 is fixedly connected to the threaded rod 281.

[0057] It should be noted that the left end of the threaded rod 281 rotates on the rectangular support plate of the device frame 1 , and similarly, the execution motor 282 is fixedly installed on the left side of the rectangular support plate of the device frame 1 .

[0058] When the connecting line is clamped between the two wire drawing rollers 25, the execution motor 282 is started to drive the threaded rod 281 to rotate, and the threaded rod 281 drives the movable frame 21 to move to the left, and the movable frame 21 drives the wire drawing roller 25 to move to the left synchronously through the movable plate 23. At the same time, since the left side of the connecting line is gathered inside the wire harness, when the wire drawing roller 25 moves to the left along the connecting line, the connecting line pulls the movable plate 23 toward the center of the movable frame 21 through the wire drawing roller 25, and the movable plate 23 compresses the coil spring, so that the elastic force of the coil spring drives the wire drawing roller 25 to continuously tighten the connecting line in the direction away from the center of the movable frame 21, so that the wire drawing roller 25 straightens the connecting line.

[0059] See also Figure 2 , Figure 8 and Fig. 9 The wire pulling mechanism 3 also includes a pulling assembly 34 jointly arranged on the lower closing block 31 and the upper closing block 32. The pulling assembly 34 includes a pulling plate 341 respectively slidably arranged on the left side of the lower closing block 31 and the upper closing block 32 through a guide tube 346. A rotating member 342 is rotatably arranged on the side where the two pulling plates 341 are close to each other. The left side of the rotating member 342 is semi-elliptical and the right side is semicircular. A No. 2 hydraulic rod 343 is fixedly installed on the inner side of the rotating member 342. Abutment springs are arranged between the lower closing block 31, the upper closing block 32 and the guide tube 346 at the corresponding position. A push rod 345 is slidably arranged inside the guide tube 346 along the left and right directions, and a push spring is arranged between the push rod 345 and the guide tube 346.

[0060] It should be noted that the support plate used to push the push rod 345 is fixedly mounted inside the moving frame 21, and the elastic force of the abutting spring is smaller than the elastic force of the pushing spring.

[0061] In the initial state, the guide tube 346 is pushed against the right side of the spring, so that the guide tube 346 drives the pulling plate 341 at the corresponding position to be located close to the lower block 31 and the upper block 32, and the two pulling plates 341 are arranged vertically up and down. When the lower block 31 and the upper block 32 are combined together, the lower block 31 and the upper block 32 drive the two pulling plates 341 to be combined together through the guide tube 346 thereon, so that the pulling plate 341 drives the rotating member 342 to be combined together synchronously, so that the two rotating members 342 form a structure with an elliptical left side and a circular right side.

[0062] Then, the telescopic section of the No. 2 hydraulic rod 343 is extended to press against the outside of the wiring harness, so that the combined rotating part 342 is fixedly connected to the wiring harness through the No. 2 hydraulic rod 343. When the movable frame 21 moves to the left to the required injection molding position of the wiring harness, the movable frame 21 pushes the pushing rod 345 to the left through the support plate thereon, and the pushing rod 345 pushes the guide tube 346 to the left through the pushing spring, so that the guide tube 346 drives the rotating part 342 to move to the left through the pulling plate 341, and the rotating part 342 pulls the wiring harness to the left through the No. 2 hydraulic rod 343, so that the wiring harness drives the connecting wire thereon to be straightened.

[0063] In actual operation, multiple connecting wires on a wiring harness may be entangled and rotated. When the connecting wires are straightened separately by the wire straightening roller 25, the connecting wires will drive the wiring harness to rotate. The wiring harness drives the two combined rotating parts 342 to rotate inside the two combined pulling plates 341 through the No. 2 hydraulic rod 343, so that the multiple connecting wires are arranged independently to avoid entanglement.

[0064] When the movable plate 23 moves to the left to the position where the wiring harness is required to be injected, the movable plate 23 moves to the outer side of the combined lower block 31 and upper block 32, so that the movable plate 23 contacts the inclined surface of the extrusion piece 333, so that the movable plate 23 pushes the extrusion piece 333 toward the middle thereof, and then the extrusion piece 333 drives the clamping block 331 to clamp on the outer side of the wiring harness through the compression spring, thereby fixing the wiring harness with the lower block 31 and the upper block 32 to prevent the wiring harness from retracting and rotating, and then retracting the telescopic section of the No. 2 hydraulic rod 343 so that the No. 2 hydraulic rod 343 no longer clamps the wiring harness, thereby avoiding excessive pulling of the wiring harness by the pulling plate 341.

[0065] See also Figure 4 , Figure 5 and Figure 6The anti-slip assembly 26 also includes a driving part 264 arranged on the movable plate 23, and the driving part 264 includes an active plate 2641 that slides along the thickness direction of the movable plate 23 on the side away from the wire drawing roller 25, and a follower block 2642 is provided on the side of the active plate 2641 close to the center of the movable frame 21 to slide along the length direction of the active plate 2641. The follower block 2642 and the side of the active plate 2641 close to the center of the movable frame 21 are respectively rotatably connected with the push-pull members 262 at corresponding positions, a protruding column is provided on the right side of the active plate 2641 away from the center of the movable frame 21, and a right-angled triangle plate 2643 is fixedly installed on the side of the rotating disk 22 away from the center of the movable frame 21.

[0066] When the movable plate 23 pushes the clamping block 331 to clamp the wire harness, the movable plate 23 drives the wire drawing roller 25 to move to the position where the connecting line is close to the wire harness injection molding, so that the connecting line drives the movable plate 23 to move to the position close to the wire harness by pulling the wire drawing roller 25, and the movable plate 23 drives the active plate 2641 to move synchronously, so that the active plate 2641 drives the raised column thereon to move to the inclined surface of the right-angled triangle plate 2643, so that the right-angled triangle plate 2643 pushes the active plate 2641 in the direction away from the movable plate 23, and the active plate 2641 drives the follower block 2642 to move synchronously.

[0067] The active plate 2641 and the follower block 2642 drive the push-pull member 262 thereon to move synchronously in a direction away from the movable plate 23, so that the push-pull member 262 drives the corresponding anti-slip square rod 261 on the same wire-winding roller 25 to shrink to the inside of the wire-winding roller 25 through the connecting plate 263, so that the anti-slip square rod 261 no longer blocks the connecting line.

[0068] See also Figure 4 , Figure 5 and Figure 7 The wire-winding mechanism 2 also includes a rotating component 27 arranged on the mobile frame 21. The rotating component 27 includes a driving column 271 rotatably arranged on the left side of the rotating disk 22 away from the center of the mobile frame 21. A steel wire rope 272 is fixedly connected to all the driving columns 271. The steel wire rope 272 is in a closed-loop structure. A moving frame 274 is provided on the upper middle side of the mobile frame 21 to slide along the front and rear directions through a No. 1 electric push rod 273. A pulling block 275 is provided inside the moving frame 274 to slide along the left and right directions. The pulling block 275 is fixedly connected to the steel wire rope 272. A limiting portion 276 is provided on the mobile frame 21.

[0069] See also Figure 5 and Figure 7 The limiting portion 276 includes limiting grooves 2761 that are evenly spaced along the circumference of the movable frame 21. The limiting grooves 2761 correspond to the positions of the rotating disk 22 one by one. A limiting block 2762 is fixedly installed on the right side of the cylindrical surface of the rotating disk 22, and the limiting block 2762 slides inside the limiting groove 2761.

[0070] When the anti-slip square rod 261 is retracted to the inside of the wire-drawing roller 25, the telescopic section of the No. 1 electric push rod 273 is retracted, so that the No. 1 electric push rod 273 drives the pulling block 275 to move forward through the moving frame 274, and the pulling block 275 drives the wire rope 272 to rotate synchronously, so that the wire rope 272 drives all the rotating disks 22 to rotate through the driving column 271. When the rotating disk 22 drives the limit block 2762 thereon to rotate from one end of the limit groove 2761 to the other end, the rotating disk 22 drives the wire-drawing roller 25 to rotate 90 degrees through the moving plate 23, thereby causing the wire-drawing roller 25 to disengage from the connecting line.

[0071] Then, the movable frame 21 continues to move to the left, so that the movable frame 21 compresses the compression spring through the extrusion piece 333. At the same time, the movable frame 21 drives the wire drawing roller 25 to move to the left side of the required injection molding position of the wire harness to avoid the movable frame 21 and the mold 43 from being blocked. Then, the telescopic section of the No. 3 hydraulic rod 44 is extended to drive the molds 43 on both sides to be combined together, and then the injection molding raw materials are introduced into the feeding pipe 42, so that the injection molding raw materials flow through the feeding pipe 42 to the inside of the combined mold 43, thereby completing the injection molding.

[0072] See also Fig. 9 The pulling assembly 34 also includes a reset portion 344 arranged on the upper pulling plate 341, and the reset portion 344 includes a supporting plate 3441 slidably arranged on the left side of the upper pulling plate 341 along the vertical direction. A No. 2 electric push rod 3442 is fixedly installed on the upper part of the upper pulling plate 341, and the telescopic section of the No. 2 electric push rod 3442 is fixedly connected to the supporting plate 3441.

[0073] It should be noted that a support plate for allowing the abutment plate 3441 to slide up and down is fixedly installed on the upper portion of the upper pulling plate 341 .

[0074] After the injection molding is completed, the telescopic section of the No. 2 electric push rod 3442 is retracted to drive the abutment plate 3441 to move downward, so that the lower side surface of the abutment plate 3441 abuts against the elliptical outer surface of the combined rotating part 342, so that the rotating part 342 rotates to the initial position, and then the mold 43, the movable frame 21 and the upper closing block 32 are reset.

[0075] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection molding process for automobile wiring harness production, characterized in that: The following steps are involved: S1. Using a clamping block to fix the positions of multiple connection terminals of the wiring harness, and then placing the clamping block inside the injection molding device; S2. Synchronously smoothing the multiple connecting wires of the wiring harness so that the multiple connecting wires of the wiring harness are arranged straight; S3, pulling the wire harness, and then locking the wire harness so that multiple connecting wires of the wire harness remain straight; S4, placing the mold (43) on the outside of the wire harness, injecting high-temperature and high-pressure raw materials, and completing the injection molding of the wire harness connector; Step S2 and step S4 are completed by using an injection molding device for automobile wire harness production, the injection molding device comprising a device frame (1), a wire straightening mechanism (2) for straightening the connecting wire is arranged in the middle of the inner side of the device frame (1), a wire pulling mechanism (3) for pulling the wire harness is arranged on the left side of the inner side of the device frame (1), and an injection molding mechanism (4) for injection molding is arranged on the device frame (1); The wire drawing mechanism (2) comprises a moving frame (21) which is slidably arranged inside the device frame (1) along the left-right direction, a rotating disk (22) is rotatably arranged on the moving frame (21) at equal intervals along its circumference, a moving plate (23) is slidably connected to the rotating disk (22) along the radial direction of the moving frame (21), a sliding block (24) is slidably arranged on the side of the moving plate (23) close to the center of the moving frame (21) along the length direction of the moving plate (23), a wire drawing roller (25) is rotatably arranged on the side of the moving plate (23) close to the center of the moving frame (21) and the same side of the sliding block (24), the wire drawing roller (25) is provided with an anti-dropping component (26) for preventing the connection line from falling off, the moving frame (21) is provided with a rotating component (27) for driving all the rotating disks (22) to rotate, and the device frame (1) is provided with a moving component (28) for driving the moving frame (21) to move; The wire pulling mechanism (3) comprises a lower closing block (31) fixedly mounted on the upper bottom side of the device frame (1); an upper closing block (32) is slidably arranged in the vertical direction on the lower top side of the device frame (1); a semicircular groove is provided on the upper part of the lower closing block (31) and the lower part of the upper closing block (32); a wire clamping assembly (33) is commonly arranged inside the lower closing block (31) and the upper closing block (32); and a pulling assembly (34) is commonly arranged on the lower closing block (31) and the upper closing block (32).

2. The injection molding process for producing automotive wiring harnesses according to claim 1, characterized in that: The anti-slip assembly (26) comprises anti-slip square rods (261) which are arranged at equal intervals along the circumference of the wire-slipping roller (25) and on a side of the movable plate (23) away from the corresponding position. The anti-slip square rods (261) are slidably connected to the wire-slipping roller (25) along the radial direction. A push-pull member (262) is arranged inside the wire-slipping roller (25) along its axial sliding direction. One end of the push-pull member (262) close to the anti-slip square rod (261) is hinged to the corresponding anti-slip square rod (261) on the same wire-slipping roller (25) through a connecting plate (263). A driving part (264) for driving the push-pull member (262) to move is arranged on the movable plate (23). An active spring is arranged between the sliding block (24) and the movable plate (23).

3. The injection molding process for producing automotive wiring harnesses according to claim 2, characterized in that: The driving part (264) comprises an active plate (2641) which slides along the thickness direction of the movable plate (23) on the side away from the wire drawing roller (25); a follower block (2642) is provided on the side of the active plate (2641) close to the center of the movable frame (21) and slides along the length direction of the active plate (2641); the follower block (2642) and the side of the active plate (2641) close to the center of the movable frame (21) are respectively rotatably connected to the push-pull member (262) at the corresponding position; a protruding column is provided on the right side of the active plate (2641) away from the center of the movable frame (21); a right-angled triangle plate (2643) is fixedly installed on the side of the rotating disk (22) away from the center of the movable frame (21); and a return spring is provided between the push-pull member (262) and the wire drawing roller (25).

4. The injection molding process for producing automotive wiring harnesses according to claim 1, characterized in that: The rotating assembly (27) comprises a driving column (271) rotatably arranged on the left side of the rotating disk (22) away from the center of the moving frame (21); a steel wire rope (272) is fixedly connected to all the driving columns (271); the steel wire rope (272) is in a closed loop structure; a moving frame (274) is slidably arranged in the front-rear direction on the upper side of the middle part of the moving frame (21) through a No. 1 electric push rod (273); a pulling block (275) is slidably arranged in the left-right direction inside the moving frame (274); the pulling block (275) is fixedly connected to the steel wire rope (272); and a limiting portion (276) is arranged on the moving frame (21).

5. The injection molding process for producing automotive wiring harnesses according to claim 4, characterized in that: The limiting portion (276) comprises limiting grooves (2761) which are arranged at equal intervals along the circumference of the movable frame (21); the limiting grooves (2761) correspond to the positions of the rotating disk (22) one by one; a limiting block (2762) is fixedly installed on the right side of the cylindrical surface of the rotating disk (22); and the limiting block (2762) slides inside the limiting groove (2761).

6. The injection molding process for producing automotive wiring harnesses according to claim 1, characterized in that: The moving assembly (28) comprises a threaded rod (281) rotatably arranged on the upper side of the bottom of the device frame (1), the threaded rod (281) being threadedly connected to the moving frame (21), an actuator motor (282) being fixedly installed on the left side of the device frame (1), an output shaft of the actuator motor (282) being fixedly connected to the threaded rod (281), and a spiral spring for pushing the moving plate (23) in a direction away from the center of the moving frame (21) being arranged between the moving plate (23) and the rotating disk (22).

7. The injection molding process for producing automotive wiring harnesses according to claim 1, characterized in that: The wire clamping assembly (33) comprises clamping blocks (331) which are respectively slidably arranged inside the lower closing block (31) and the upper closing block (32) along the vertical direction. The clamping blocks (331) inside the lower closing block (31) and the upper closing block (32) are arranged symmetrically with each other. Active springs are arranged between the lower closing block (31), the upper closing block (32) and the clamping blocks (331) at corresponding positions. An extrusion piece (333) is slidably arranged on the side of the two clamping blocks (331) away from each other. An inclined surface is arranged on the side of the extrusion piece (333) away from the clamping block (331). A compression spring is arranged between the extrusion piece (333) and the clamping block (331). A No. 1 hydraulic rod (332) is fixedly installed on the upper part of the device frame (1). The telescopic section of the No. 1 hydraulic rod (332) is fixedly connected to the upper closing block (32).

8. The injection molding process for producing automotive wiring harnesses according to claim 1, characterized in that: The pulling assembly (34) comprises a pulling plate (341) which is respectively slidably arranged on the left side of the lower closing block (31) and the upper closing block (32) through a guide tube (346). A rotating member (342) is rotatably arranged on the side close to each other of the two pulling plates (341). The left side of the rotating member (342) is semi-elliptical and the right side is semi-circular. A second hydraulic rod (343) is fixedly installed on the inner side of the rotating member (342). A reset portion (344) for resetting the rotating member (342) is arranged on the upper pulling plate (341). Abutment springs are arranged between the lower closing block (31), the upper closing block (32) and the guide tube (346) at the corresponding position. A push rod (345) is slidably arranged inside the guide tube (346) along the left and right directions. A push spring is arranged between the push rod (345) and the guide tube (346).

9. The injection molding process for producing automotive wiring harnesses according to claim 8, characterized in that: The reset portion (344) comprises a supporting plate (3441) slidably arranged in the vertical direction on the left side of the upper pulling plate (341); a second electric push rod (3442) is fixedly installed on the upper part of the upper pulling plate (341); and a telescopic section of the second electric push rod (3442) is fixedly connected to the supporting plate (3441).

10. The injection molding process for producing automotive wiring harnesses according to claim 1, characterized in that: The injection molding mechanism (4) comprises a clamping plate (41) arranged on the right side of the device frame (1) in a plug-in manner, a rectangular groove for inserting the clamping plate (41) is opened on the right side of the device frame (1), a feed pipe (42) is fixedly installed on the right side of the clamping plate (41), a mold (43) is symmetrically arranged on the device frame (1) in the front and rear directions, the mold (43) is slidably connected to the device frame (1) along the front and rear directions through a guide column, and a third hydraulic rod (44) is fixedly installed on the device frame (1) in the front and rear directions, and the telescopic section of the third hydraulic rod (44) is fixedly connected to the mold (43) at the corresponding position.

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