Injection molding equipment and injection molding method for automobile electronic vacuum pump wiring harness

Abstract

The present invention discloses an injection molding device for an automotive electronic vacuum pump wiring harness and an injection molding method thereof, comprising a base, wherein a lower mold plate is installed on the upper end surface of the base; further comprising: an upper mold mechanism, which is arranged inside the shell, and the upper mold mechanism is composed of a lifting plate and an upper mold plate; a wiring harness guiding mechanism, which is arranged at the front side of the upper end surface of the base, the lower fixed frame and the upper movable frame are both installed with rollers, and an elastic supporting mechanism connected to the lifting plate is installed above the upper movable frame; a hole blocking mechanism, which is arranged behind the wiring harness guiding mechanism, and a displacement mechanism is installed above the hole blocking mechanism, which is translated back and forth as the upper movable frame is raised and lowered, and a clamping mechanism is installed inside the displacement mechanism, and the arc-shaped rubber block is clamped and released as the displacement mechanism is translated back and forth, thereby solving the problem that wrinkles on the surface of the automotive wiring harness are prone to generate gaps between the outer wall and the channel cavity after entering the wiring harness injection molding channel.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness injection molding devices, in particular to an injection molding device for an automotive electronic vacuum pump wire harness and an injection molding method thereof. Background Art

[0002] Injection molding equipment for automotive electronic vacuum pump wiring harnesses is a device specifically designed for producing automotive electronic vacuum pump wiring harnesses. It combines the characteristics of injection molding technology and wiring harness manufacturing to efficiently and accurately complete the injection molding and wrapping of wiring harnesses. The injection molding machine is the core component of the injection molding system, responsible for injecting molten plastic material into the mold. The injection molding machine requires high-precision injection control to ensure the uniformity and stability of the plastic during the injection molding process. The inner mold is used to fix the wiring harness and ensure that the wiring harness does not shake during the injection molding process. The outer mold consists of an upper mold and a lower mold, which together form the injection cavity, wrapping the molten plastic material around the wiring harness. Generally, the wiring harness is placed in the inner mold of the injection molding machine and fixed. The outer mold is closed to form the injection cavity. The injection molding machine injects the molten plastic material into the injection cavity through the channel port, wrapping it around the wiring harness. The cooling system is activated to cool the injection-molded wiring harness shell. The mold is opened and the completed automotive electronic vacuum pump wiring harness is removed.

[0003] For example, the Chinese patent application CN115946298A, "Injection Molding Equipment and Processing Technology for Automotive Electronic Vacuum Pump Wiring Harnesses," includes an inner mold and an outer mold. The outer mold includes an upper mold and a lower mold. One side of the inner mold is connected to the upper mold, and the other side of the inner mold is connected to the lower mold. The inner mold is used to fix the wiring harness. The upper mold is connected to the lower mold. The upper and lower molds together form an injection molding cavity. The injection molding cavity is used to wrap the outer periphery of the connection between the wires placed therein and the terminal blocks with an insulating shell. The upper mold is provided with a passage opening that is connected to the injection molding cavity. The terminal blocks are fixed by the inner mold, and then the connection between the terminal blocks and the wires placed in the injection molding cavity is injection molded.

[0004] Although the above-mentioned existing technology realizes the injection molding of automobile wiring harnesses, it is affected by the processing technology of the wiring harness itself, and wrinkles or protrusions are easily present on the surface. Then, in the process of entering the wiring harness injection molding channel, a gap is easily generated between its outer wall and the channel cavity, resulting in the problem of material overflow during the injection molding process, affecting the processing quality of the plastic at the end of the wiring harness. Therefore, it does not meet the existing needs. In this regard, we propose an injection molding device and an injection molding method for an automotive electronic vacuum pump wiring harness. Summary of the Invention

[0005] The purpose of the present invention is to provide an injection molding device and an injection molding method for an automotive electronic vacuum pump wiring harness, so as to solve the problem proposed in the above background technology that wrinkles on the surface of the automotive wiring harness are prone to cause gaps between the outer wall and the channel cavity after entering the wiring harness injection molding channel.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an injection molding device for an automotive electronic vacuum pump wiring harness, comprising a base, a housing welded to the outer edge of the upper end of the base, a top plate welded to the top end of the housing, a lower template mounted on the upper end surface of the base, and the lower template and the base fixed by bolts; and further comprising:

[0007] An upper mold mechanism is arranged inside the housing, and the upper mold mechanism consists of a lifting plate and an upper mold plate, and the upper mold plate is fixed to the bottom of the lifting plate by bolts, and screw sliders are installed at the four corners of the upper mold plate, and a screw rod is passed through the interior of the screw slider, and the upper and lower ends of the screw rod are rotatably connected to the base and the top plate respectively;

[0008] A wire harness guide mechanism is provided on the front side of the upper end surface of the base, the wire harness guide mechanism includes a lower fixed frame, and the bottom of the lower fixed frame is fixed to the base, an upper movable frame is provided above the lower fixed frame, and rollers are installed inside the lower fixed frame and the upper movable frame, and an elastic support mechanism connected to the lifting plate is installed above the upper movable frame, and a positioning groove is provided on the surface of the roller;

[0009] A hole-blocking mechanism is provided at the rear of the wire harness guide mechanism. A displacement mechanism is installed above the hole-blocking mechanism. The displacement mechanism is connected to the wire harness guide mechanism through a rack mechanism and translates back and forth as the upper movable frame is raised and lowered. A clamping mechanism is installed inside the displacement mechanism. A wire harness through hole is provided at the center of the clamping mechanism. Four arc-shaped rubber blocks are equidistantly distributed in a circular shape at the rear end of the clamping mechanism. The arc-shaped rubber blocks are concentric circles. The arc-shaped rubber blocks are clamped and released as the displacement mechanism translates back and forth.

[0010] Preferably, the elastic support mechanism includes an extension plate, the rear end of the extension plate is plugged and fixed to the lifting plate, and support mechanisms are fixedly installed on both sides of the interior of the extension plate. A downward-extending telescopic plate is slidably installed in the inner cavity of the support mechanism, and the bottom of the telescopic plate is fixed to the upper movable frame by screws, and a support spring is fixedly installed between the inner cavity of the support mechanism and the upper end of the telescopic plate.

[0011] Preferably, the rack mechanism includes a first rack plate, the first rack plate is arranged on both sides of the upper movable frame, and the upper end of the first rack plate is plugged and fixed to the upper movable frame, one end of the rotating roller shaft inside the lower fixed frame extends to the outside of the upper movable frame, and one end of the rotating roller shaft inside the lower fixed frame is fixedly installed with a first driven gear, and the first driven gear is meshed and connected with the first rack plate, and a groove for the first rack plate to extend downward is reserved on the base.

[0012] Preferably, the rack mechanism also includes a second rack plate, the second rack plate is arranged at the rear end of the first rack plate, and the second rack plate is integrally formed with the first rack plate, a second driven gear is provided on one side of the blocking mechanism, and the second driven gear is meshed with the second rack plate, a stud is rotatably installed in the slide groove in the middle of the blocking mechanism, a sliding block is rotatably installed on the outside of the stud, the upper end of the sliding block is fixed to the bottom of the displacement mechanism, and the sliding block is slidably limited in the slide groove inside the blocking mechanism, the external thread of the stud is threadedly connected to the internal screw hole of the sliding block, one end of the second driven gear shaft is fixedly provided with a connecting shaft, the connecting shaft extends to the interior of the blocking mechanism, and the connecting shaft is connected to the blocking mechanism through a bearing, and the end of the connecting shaft located inside the blocking mechanism is connected to the front end of the stud through a bevel gear transmission.

[0013] Preferably, the clamping mechanism includes a threaded disk, and the threaded disk is rotatably connected to the displacement mechanism through a bearing, the rear end of the threaded disk is provided with four annularly distributed limiting movable blocks, and the limiting thread on the front end face of the limiting movable block is engaged with the plane thread on the contact end face of the threaded disk, and the rear wall of the clamping mechanism is provided with four annularly distributed guide grooves, the limiting movable block passes through the guide groove and is fixed to the arc-shaped rubber block, and the limiting movable block and the guide groove are slidably limited.

[0014] Preferably, a third rack plate is fixedly provided on both sides of the upper end surface of the hole blocking mechanism, a transmission rod is rotatably installed at the lower part inside the displacement mechanism, transmission gears are fixedly installed at both ends of the transmission rod, and the transmission gears are meshed with the third rack plate, a worm is installed below the corresponding threaded disk of the transmission rod, and the worm and the transmission rod are plugged and limited, a worm wheel is fixedly installed on the outer ring of the threaded disk, and the external thread of the worm wheel is adapted to the worm wheel.

[0015] Preferably, the lower template and the upper template both include an injection cavity, and the injection cavity is arranged inside the lower template, a wiring harness channel is provided at the front end of the injection cavity, a plugging hole is provided at the front end of the wiring harness channel, and the center of the cylinder formed by the arc-shaped rubber block and the center of the plugging hole on the lower template are maintained on the same straight line, so that the outlet end of the wiring harness channel is closed, and an extrusion mechanism is fixedly installed at the center position of the upper end face of the upper mold mechanism, and the discharge port of the extrusion mechanism is connected to the injection cavity of the upper template.

[0016] Preferably, a transmission device is installed on both sides of the upper end surface of the top plate, and the transmission device includes a dual-axis synchronous servo motor arranged at the internal middle position, and the output shafts of the dual-axis synchronous servo motor are connected to the upper end shaft of the screw rod through bevel gears.

[0017] Preferably, doors are installed on both sides of the front end of the shell, and the doors are connected to the shell through hinges.

[0018] The injection molding method of the injection molding equipment of the automotive electronic vacuum pump wiring harness comprises the following steps:

[0019] Step 1: In the initial state, the upper mold mechanism is in a high position, and the wire harness guide mechanism is in an open structure. The staff places the automobile vacuum pump wire harness in the positioning groove of the lower roller and inserts one end of it into the wire harness through hole of the displacement mechanism;

[0020] Step 2: Driven by the transmission device, the four screw rods rotate synchronously, and the upper template moves toward the lower template under the friction of the threads of the sliders at the four corners of the lifting plate. During the downward movement, the roller inside the upper movable frame preferentially approaches the roller of the lower fixed frame below, and the upper and lower positioning grooves contact and wrap the wire harness. As the extension plate continues to descend, the first rack plate is driven to descend, meshing with the first driven gear, driving the roller inside the lower fixed frame to rotate. Then, during the downward movement of the lifting plate, the wire harness extends toward the inside of the template forming cavity;

[0021] Step 3: During the extension process, the second rack plate at the rear end of the first rack plate meshes with the second driven gear on the side of the hole blocking mechanism, driving the connecting shaft to rotate. The two bevel gears drive the stud to rotate, and the sliding block drives the displacement mechanism to move toward the template.

[0022] Step 4: During the movement of the displacement mechanism, the transmission gears on both sides of the transmission rod are engaged with the third rack plates on both sides of the upper end surface of the hole blocking mechanism, driving the transmission rod to rotate, and the worm on the outside of the transmission rod cooperates with the worm wheel on the outer wall of the threaded disk to drive the threaded disk to rotate. The limiting thread on the rear end surface of the limiting movable block is engaged with the flat thread on the contact end surface of the threaded disk. The rotation of the flat thread drives the limiting movable block to move along the direction of the guide groove, so that the multiple arc-shaped rubber blocks move synchronously toward the surface of the wiring harness until the surface of the wiring harness is clamped and fixed. Subsequently, the column formed by the clamped arc-shaped rubber block enters the blocking hole to seal the entrance of the wiring harness channel;

[0023] Step 5. Finally, the upper and lower molds are closed, and hot melt plastic can be injected into the injection cavity through the extrusion mechanism to realize the injection molding of the wire harness.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention is provided with a harness guide mechanism, which can cooperate with the upper mold mechanism to realize the automatic entry of the harness. When the upper mold mechanism is in a high position, the harness guide mechanism is in an open structure. The staff can place the automobile vacuum pump harness in the positioning groove of the lower roller and insert one end of it into the harness through-hole of the displacement mechanism. Driven by the transmission device, the four lead screws rotate synchronously and convert the rotational motion into linear motion under the friction with the threads of the sliders at the four corners of the lifting plate, thereby driving the upper template to move toward the lower template. During the downward movement, the roller inside the upper movable frame preferentially contacts the roller of the lower fixed frame. The upper and lower positioning grooves fix the harness to avoid deviation. As the extension plate continues to descend, the pressure exerted by the upper roller on the harness continues to increase, thereby ensuring that a high friction force is maintained between the two. At the same time, the upper movable frame During the downward movement of the movable frame, the first rack plate will also be driven to descend. Under the meshing of the first rack plate and the first driven gear, the roller inside the lower fixed frame is driven to rotate, so that during the downward movement of the lifting plate, the wire harness is extended toward the inside of the template molding cavity until the end of the wire harness contacts the top of the injection cavity. At this time, the upper template and the lower template complete the mold closing, and hot melt plastic can be injected into the injection cavity through the extrusion mechanism to realize the injection molding of the wire harness. The wire harness guiding mechanism can not only realize the automatic transportation of the wire harness, but also ensure the stability of the wire harness during the transportation process, and at the same time ensure that the end of the wire harness contacts the top of the injection cavity, ensuring the consistency of the head length after injection, thereby improving the injection molding quality of the wire harness. On the other hand, it also improves the safety of the injection molding work. The staff does not need to directly contact the upper and lower templates, reducing the possibility of processing accidents.

[0026] 2. The present invention is provided with a blocking mechanism, which cooperates with the blocking hole formed after the lower template and the upper template are molded together. At the same time, the blocking mechanism can cooperate with the wire harness guide mechanism. The wire harness will pass through the wire harness through-hole during pre-arrangement. As the upper movable frame descends, the second rack plate at the rear end of the first rack plate will mesh with the second driven gear on the side of the blocking mechanism, thereby driving the connecting shaft to rotate, and the stud is driven to rotate under the transmission of the two bevel gears. The external thread of the stud forms friction with the internal screw hole of the sliding block, and cooperates with the guiding effect of the sliding groove of the blocking mechanism on the sliding block, thereby driving the displacement mechanism to move toward the template through the sliding block. During the movement of the displacement mechanism, the transmission gears on both sides of the transmission rod will mesh with the third rack plates on both sides of the upper end face of the blocking mechanism, thereby driving the transmission rod to rotate. Two worms are respectively provided at the two ends of the outside of the transmission rod, and the worm and the worm wheel on the outer ring of the threaded disk are The contact surface between them forms a spiral friction transmission surface, which drives the worm wheel to rotate through the rotation of the worm, and then drives the threaded disk to rotate through the worm wheel. Since the limiting thread on the rear end face of the limiting movable block is engaged with the flat thread on the contact end face of the threaded disk, the rotation of the flat thread drives the limiting movable block to move along the direction of the guide groove, thereby realizing the synchronous movement of multiple arc-shaped rubber blocks toward the surface of the wiring harness until the surface of the wiring harness is clamped and fixed. Subsequently, the column formed by the clamped arc-shaped rubber block will enter the plugging hole to seal the entrance of the wiring harness channel, thereby avoiding the wrinkles on the surface of the automobile wiring harness. After entering the wiring harness injection molding channel, a gap is generated between its outer wall and the channel cavity, resulting in the problem of material overflow during the injection molding process. Moreover, this structure cooperates with the wiring harness guide mechanism and the upper mold mechanism, and the transmission structure is reasonably designed to ensure the stability of the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an overall three-dimensional diagram of the present invention;

[0028] Figure 2 A three-dimensional diagram of the internal structure of the housing of the present invention;

[0029] Figure 3 It is a three-dimensional diagram of the extrusion mechanism and the hole blocking mechanism of the present invention;

[0030] Figure 4 It is a side structural diagram of the extrusion mechanism and the hole blocking mechanism of the present invention;

[0031] Figure 5 It is a rear view of the squeezing mechanism and the hole blocking mechanism of the present invention;

[0032] Figure 6 Schematic diagram of the transmission structure of the displacement mechanism of the present invention;

[0033] Figure 7 It is a schematic diagram of the transmission structure of the hole blocking mechanism of the present invention.

[0034] In the figure: 1. base; 2. housing; 3. top plate; 4. door; 5. hinge; 6. transmission device; 7. extrusion mechanism; 8. upper die mechanism; 9. lower die plate; 10. screw rod; 11. wire harness guide mechanism; 12. lifting plate; 13. upper die plate; 14. lower fixed frame; 15. upper movable frame; 16. roller; 17. positioning groove; 18. first driven gear; 19. first rack plate; 20. second rack plate; 21. plugging mechanism; 22. second driven gear Gear; 23. Extension plate; 24. Support mechanism; 25. Telescopic plate; 26. Displacement mechanism; 27. Clamping mechanism; 28. Arc-shaped rubber block; 29. ​​Plug hole; 30. Wire harness channel; 31. Injection molding cavity; 32. Third rack plate; 33. Wire harness through hole; 34. Sliding block; 35. Stud; 36. Threaded disk; 37. Limiting movable block; 38. Worm gear; 39. Transmission rod; 40. Worm; 41. Transmission gear; 42. Connecting shaft; 43. Guide groove. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] See also Figure 1-7 The present invention provides an embodiment of an injection molding device for an automotive electronic vacuum pump wiring harness, comprising a base 1, a housing 2 welded to the outer edge of the upper end of the base 1, a top plate 3 welded to the top end of the housing 2, a lower template 9 mounted on the upper end surface of the base 1, and the lower template 9 is fixed to the base 1 by bolts; and further comprising:

[0037] The upper mold mechanism 8 is arranged inside the housing 2. The upper mold mechanism 8 consists of a lifting plate 12 and an upper mold plate 13. The upper mold plate 13 is fixed to the bottom of the lifting plate 12 by bolts. Screw sliders are installed at the four corners of the upper mold plate 13. The interior of the screw slider is penetrated by a screw rod 10. The upper and lower ends of the screw rod 10 are rotatably connected to the base 1 and the top plate 3 respectively.

[0038] The wire harness guide mechanism 11 is arranged on the front side of the upper end surface of the base 1. The wire harness guide mechanism 11 includes a lower fixed frame 14, and the bottom of the lower fixed frame 14 is fixed to the base 1. An upper movable frame 15 is arranged above the lower fixed frame 14. Rollers 16 are installed inside the lower fixed frame 14 and the upper movable frame 15. An elastic support mechanism connected to the lifting plate 12 is installed above the upper movable frame 15. A positioning groove 17 is provided on the surface of the roller 16;

[0039] The hole blocking mechanism 21 is arranged behind the wire harness guide mechanism 11. A displacement mechanism 26 is installed above the hole blocking mechanism 21. The displacement mechanism 26 is connected to the wire harness guide mechanism 11 through a rack mechanism, and moves back and forth as the upper movable frame 15 is raised and lowered. A clamping mechanism 27 is installed inside the displacement mechanism 26. A wire harness through hole 33 is provided at the center of the clamping mechanism 27. The rear end of the clamping mechanism 27 is provided with four arc-shaped rubber blocks 28 distributed in a circular shape and at equal distances. The arc-shaped rubber blocks 28 are concentric circles, and the arc-shaped rubber blocks 28 are clamped and released as the displacement mechanism 26 moves back and forth.

[0040] The wire harness guiding mechanism 11 can not only realize the automatic transportation of the wire harness, but also ensure the stability of the wire harness during the transportation process. At the same time, it can ensure that the end of the wire harness is in contact with the top of the injection cavity, ensuring the consistency of the head length after injection, and improving the injection quality of the wire harness. On the other hand, it also improves the safety of the injection molding work. The staff does not need to directly contact the upper and lower templates, reducing the possibility of processing accidents. The plugging mechanism 21 can prevent the wrinkles on the surface of the automobile wire harness from entering the wire harness injection channel. After the gap is generated between its outer wall and the channel cavity, it causes the problem of material overflow during the injection molding process. Moreover, this structure cooperates with the wire harness guiding mechanism 11 and the upper mold mechanism 8 synchronously, and the transmission structure is reasonably designed to ensure the stability of the operation process.

[0041] See also Figure 2 The elastic support mechanism includes an extension plate 23, the rear end of the extension plate 23 is plugged and fixed to the lifting plate 12, and support mechanisms 24 are fixedly installed on both sides of the interior of the extension plate 23. A downward-extending telescopic plate 25 is slidably installed in the inner cavity of the support mechanism 24, and the bottom of the telescopic plate 25 is fixed to the upper movable frame 15 by screws. A support spring is fixedly installed between the inner cavity of the support mechanism 24 and the upper end of the telescopic plate 25. When the lifting plate 12 drives the extension plate 23 to descend, the internal roller 16 of the upper movable frame 15 will contact the wiring harness first. At the same time, the telescopic plate 25 will be subjected to downward pressure, thereby compressing the support spring, ensuring that the lifting plate 12 continues to descend while the internal roller 16 of the upper movable frame 15 improves the fixing effect of the wiring harness.

[0042] See also Figure 2 、 Figure 3 and Figure 4, the rack mechanism includes a first rack plate 19, the first rack plate 19 is arranged on both sides of the upper movable frame 15, and the upper end of the first rack plate 19 is plugged and fixed with the upper movable frame 15, one end of the shaft of the internal roller 16 of the lower fixed frame 14 extends to the outside of the upper movable frame 15, and one end of the shaft of the internal roller 16 of the lower fixed frame 14 is fixedly installed with a first driven gear 18, and the first driven gear 18 is meshed and connected with the first rack plate 19, and a groove extending downward from the first rack plate 19 is reserved on the base 1. When the lifting plate 12 drives the upper movable frame 15 to descend, the first rack plate 19 also descends. Since the first rack plate 19 is connected to the first driven gear 1 8 meshes, so the first driven gear 18 rotates as the first rack plate 19 descends. The rotation of the first driven gear 18 drives the roller 16 inside the lower fixed frame 14 to rotate. In this way, the wire harness between the upper and lower rollers 16 can be smoothly conveyed into the mold forming cavity. The base 1 has a groove reserved for the first rack plate 19 to extend downward. This groove provides sufficient space for the first rack plate 19 to descend and ensures smooth transmission. The rack mechanism achieves synchronous transmission between the upper movable frame 15 and the roller 16 inside the lower fixed frame 14 through the engagement of the first rack plate 19 and the first driven gear 18. This synchronous transmission ensures the stability and accuracy of the wire harness during the conveying process.

[0043] See also Figure 4 、 Figure 5 and Figure 7The rack mechanism also includes a second rack plate 20, the second rack plate 20 is arranged at the rear end of the first rack plate 19, and the second rack plate 20 is integrally formed with the first rack plate 19, and a second driven gear 22 is provided on one side of the blocking mechanism 21, and the second driven gear 22 is meshed with the second rack plate 20, and a stud 35 is rotatably installed in the slide groove in the middle of the blocking mechanism 21, and a sliding block 34 is installed on the outside of the stud 35, the upper end of the sliding block 34 is fixed to the bottom of the displacement mechanism 26, and the sliding block 34 is slidably limited with the slide groove inside the blocking mechanism 21, and the external thread of the stud 35 is threadedly connected to the internal screw hole of the sliding block 34, and one end of the shaft of the second driven gear 22 is fixedly provided with a connecting shaft 42, which extends to the interior of the blocking mechanism 21, and the connecting shaft 42 is connected to the blocking mechanism 21 through a bearing, and one end of the connecting shaft 42 is located inside the blocking mechanism 21 and is connected to the front end of the stud 35 through a bevel gear transmission. When the template 13 descends under the drive of the screw rod 10, the first rack plate 19 descends accordingly and engages with the first driven gear 18, driving the roller 16 inside the lower fixed frame 14 to rotate, thereby realizing the preliminary guiding and positioning of the wire harness. At the same time, the second rack plate 20 at the rear end of the first rack plate 19 also begins to descend and engages with the second driven gear 22, driving the connecting shaft 42 to rotate. The rotation of the connecting shaft 42 is transmitted to the stud 35 through the bevel gear. The rotation of the stud 35 drives the sliding block 34 to slide in the slide groove inside the hole blocking mechanism 21 through a threaded connection, thereby driving the displacement mechanism 26 to move toward the template. This design realizes the automation process of wire harness guiding, hole blocking and injection molding, reduces manual intervention, and improves production efficiency and product quality stability. Through the precise control of the rack mechanism and gear transmission, the precise movement and positioning of the displacement mechanism 26 and the hole blocking mechanism 21 can be achieved, thereby ensuring the stability and consistency of the wire harness during the injection molding process.

[0044] See also Figure 3 、 Figure 5 and Figure 6The clamping mechanism 27 includes a threaded disk 36, and the threaded disk 36 is rotatably connected to the displacement mechanism 26 through a bearing. The rear end of the threaded disk 36 is provided with four annularly distributed limiting movable blocks 37, and the limiting threads on the front end surface of the limiting movable block 37 engage with the flat threads on the contact end surface of the threaded disk 36. The rear wall of the clamping mechanism 27 is provided with four annularly distributed guide grooves 43. The limiting movable block 37 passes through the guide grooves 43 and is fixed to the arc-shaped rubber block 28, and the limiting movable block 37 slides and limits with the guide grooves 43. When the displacement mechanism 26 moves toward the template under the drive of the rack mechanism, the transmission gear 41 on the transmission rod 39 engages with the third rack plate 32 at the upper end of the hole blocking mechanism 21, driving the transmission rod 39 to rotate, and the worm 40 outside the transmission rod 39 cooperates with the worm wheel 38 on the outer wall of the threaded disk 36, and drives the threaded disk 36 to rotate through the transmission mode of the worm gear. The rotation of the threaded disk 36 makes The flat thread on its contact end face moves relative to the limiting thread on the front end face of the limiting movable block 37. Since the two are in a meshing relationship, the rotation of the flat thread will drive the limiting movable block 37 to move along the direction of the guide groove 43. The movement of the limiting movable block 37 drives the arc-shaped rubber block 28 fixed thereto to move synchronously toward the surface of the wiring harness until the surface of the wiring harness is clamped and fixed. Through the threaded engagement between the threaded disk 36 and the limiting movable block 37, the moving distance of the arc-shaped rubber block 28 is precisely controlled, thereby ensuring the accuracy and consistency of the wiring harness clamping. Since the arc-shaped rubber block 28 has a certain elasticity and deformability, it can adapt to wiring harnesses of different diameters and shapes, thereby improving the adaptability and versatility of the equipment. As a clamping element, the arc-shaped rubber block 28 is made of a soft material that can avoid damage to the wiring harness surface during the clamping process, thereby protecting the integrity and performance of the wiring harness.

[0045] See also Figure 3 and Figure 6, a third rack plate 32 is fixedly provided on both sides of the upper end surface of the blocking mechanism 21, a transmission rod 39 is rotatably installed at the lower part of the displacement mechanism 26, and a transmission gear 41 is fixedly installed at both ends of the transmission rod 39, and the transmission gear 41 is meshed with the third rack plate 32, a worm 40 is installed below the transmission rod 39 corresponding to the threaded disk 36, and the worm 40 and the transmission rod 39 are plugged and limited, a worm wheel 38 is fixedly installed on the outer ring of the threaded disk 36, and the external thread of the worm wheel 38 is adapted to the worm 40, when the blocking When the hole mechanism 21 moves with the synchronous movement of the wire harness guide mechanism 11 and the upper mold mechanism 8, the third rack plate 32 on its upper end face will move accordingly, and the transmission gears 41 at both ends of the transmission rod 39 will engage with the third rack plate 32. Therefore, when the third rack plate 32 moves, it will drive the transmission rod 39 to rotate, and the rotation of the transmission rod 39 will drive the worm 40 to rotate. Because the worm 40 and the transmission rod 39 are plug-in limited, the two maintain synchronous rotation, and the rotation of the worm 40 further drives the worm wheel 38 engaged with it to rotate. Since the worm gear 38 is fixedly mounted on the outer ring of the threaded disk 36, the threaded disk 36 will also rotate accordingly. The rotation of the threaded disk 36 will cause the flat thread on its rear end face to engage with the limiting thread on the front end face of the limiting movable block 37. Driven by the thread, the limiting movable block 37 will move along the direction of the guide groove 43, thereby driving the arc-shaped rubber block 28 fixed thereto to move synchronously. This structure realizes the synchronous movement of the hole blocking mechanism 21, the wiring harness guide mechanism 11, and the upper mold mechanism 8 through the cooperation of multiple gears and transmission rods, ensuring the coordination and stability of each component during the movement process. The worm and worm gear transmission has a large transmission ratio and self-locking property, and can accurately control the rotation angle and speed of the threaded disk 36, thereby realizing precise control of the clamping force of the arc-shaped rubber block 28.

[0046] See also Figure 3The lower template 9 and the upper template 13 both include an injection cavity 31, and the injection cavity 31 is arranged inside the lower template 9. The front end of the injection cavity 31 is provided with a wire harness channel 30, and the front end of the wire harness channel 30 is provided with a plugging hole 29, and the center of the circle of the cylinder formed by the arc-shaped rubber block 28 is kept on the same straight line as the center of the plugging hole 29 on the lower template 9, and the outlet end of the wire harness channel 30 is closed after closing. The extrusion mechanism 7 is fixedly installed at the center position of the upper end face of the upper mold mechanism 8, and the discharge port of the extrusion mechanism 7 is connected to the injection cavity 31 of the upper template 13. When the lower template 9 and the upper template 13 are closed, the injection cavity 31 inside them will form a closed injection space. This injection space is used to accommodate hot-melt plastic to realize the injection molding of the wire harness. The front end of the injection cavity 31 is provided with a wire harness channel 30, which is used to guide the wire harness into the injection cavity 31. The design of the wiring harness channel 30 ensures the positional stability and accuracy of the wiring harness during the injection molding process. A plugging hole 29 is provided at the front end of the wiring harness channel 30, which plays a key role in the injection molding process. When the arc-shaped rubber block 28 moves toward the surface of the wiring harness and clamps under the drive of the clamping mechanism 27, they form a cylinder that matches the plugging hole 29, thereby closing the outlet end of the wiring harness channel 30. The center of the arc-shaped rubber block 28 and the center of the plugging hole 29 remain on the same straight line, which ensures that the clamped rubber block can be accurately inserted into the plugging hole to achieve effective sealing. By providing the injection molding cavity 31 and the wiring harness channel 30, the positional stability and accuracy of the wiring harness during the injection molding process can be ensured, thereby improving the injection molding quality. The use of the plugging hole 29 and the arc-shaped rubber block 28 can effectively prevent material overflow during the injection molding process, further improving the injection molding quality.

[0047] The injection molding method of the injection molding equipment of the automotive electronic vacuum pump wiring harness comprises the following steps:

[0048] Step 1: Initial state: The upper mold mechanism 8 is in a high position, and the harness guide mechanism 11 is in an open structure. The staff places the automotive vacuum pump harness in the positioning groove 17 of the lower roller 16 and inserts one end of the harness into the harness through hole 33 of the displacement mechanism 26;

[0049] Step 2: Under the drive of the transmission device 6, the four screw rods 10 rotate synchronously, and the upper template 13 is driven to move toward the lower template 9 under the friction of the threads of the sliders at the four corners of the lifting plate. During the downward movement, the roller 16 inside the upper movable frame 15 preferentially approaches the roller 16 of the lower fixed frame 14 below, and the upper and lower positioning grooves 17 contact and wrap the wire harness. As the extension plate 23 continues to descend, the first rack plate 19 is driven to descend, meshing with the first driven gear 18, and driving the roller 16 inside the lower fixed frame 14 to rotate. Then, during the downward movement of the lifting plate 12, the wire harness extends toward the inside of the template molding cavity;

[0050] Step 3: During the extension process, the second rack plate 20 at the rear end of the first rack plate 19 engages with the second driven gear 22 on the side of the hole blocking mechanism 21, driving the connecting shaft 42 to rotate. The two bevel gears drive the stud 35 to rotate, and the sliding block 34 drives the displacement mechanism 26 to move toward the template.

[0051] Step 4: During the movement of the displacement mechanism, the transmission gears 41 on both sides of the transmission rod 39 engage with the third rack plates 32 on both sides of the upper end surface of the hole blocking mechanism 21, driving the transmission rod 39 to rotate, and the worm on the outside of the transmission rod 39 cooperates with the worm gear on the outer wall of the threaded disk 36 to drive the threaded disk 36 to rotate, and the limiting thread on the rear end surface of the limiting movable block 37 engages with the flat thread on the contact end surface of the threaded disk 36. The rotation of the flat thread drives the limiting movable block 37 to move along the direction of the guide groove 43, so that the multiple arc-shaped rubber blocks 28 move synchronously toward the surface of the wiring harness until the surface of the wiring harness is clamped and fixed. Subsequently, the column formed by the clamped arc-shaped rubber block 28 enters the blocking hole 29 to block the entrance of the wiring harness channel 30;

[0052] Step 5: Finally, the upper mold plate 13 and the lower mold plate 9 are closed, and hot melt plastic can be injected into the injection cavity 31 through the extrusion mechanism 7 to achieve the injection molding of the wire harness.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An injection molding device for an automotive electronic vacuum pump wiring harness, comprising a base (1), a housing (2) welded and fixed to the outer edge of the upper end of the base (1), a top plate (3) welded and fixed to the top end of the housing (2), a lower template (9) mounted on the upper end surface of the base (1), and the lower template (9) and the base (1) are fixed by bolts; Its characteristics are: Also includes: An upper mold mechanism (8) is arranged inside the housing (2), and the upper mold mechanism (8) is composed of a lifting plate (12) and an upper mold plate (13), and the upper mold plate (13) is fixed to the bottom of the lifting plate (12) by bolts, and screw sliders are installed at the four corners of the upper mold plate (13), and a screw rod (10) passes through the interior of the screw slider, and the upper and lower ends of the screw rod (10) are rotatably connected to the base (1) and the top plate (3) respectively; A wire harness guide mechanism (11) is arranged on the front side of the upper end surface of the base (1), the wire harness guide mechanism (11) includes a lower fixed frame (14), and the bottom of the lower fixed frame (14) is fixed to the base (1), an upper movable frame (15) is arranged above the lower fixed frame (14), and rollers (16) are installed inside the lower fixed frame (14) and the upper movable frame (15), an elastic support mechanism connected to the lifting plate (12) is installed above the upper movable frame (15), and a positioning groove (17) is provided on the surface of the roller (16); A hole blocking mechanism (21) is arranged at the rear of the wire harness guide mechanism (11), a displacement mechanism (26) is installed above the hole blocking mechanism (21), the displacement mechanism (26) is connected to the wire harness guide mechanism (11) through a rack mechanism, and moves forward and backward with the lifting and lowering of the upper movable frame (15), a clamping mechanism (27) is installed inside the displacement mechanism (26), a wire harness through hole (33) is provided at the center of the clamping mechanism (27), and four arc-shaped rubber blocks (28) are distributed in an annular shape at equal intervals at the rear end of the clamping mechanism (27), the arc-shaped rubber blocks (28) are concentric circles, and the arc-shaped rubber blocks (28) move forward and backward with the lifting and lowering of the displacement mechanism (26). The lower mold plate (9) and the upper mold plate (13) are both clamped and loosened. The lower mold plate (9) and the upper mold plate (13) both include an injection cavity (31), and the injection cavity (31) is arranged inside the lower mold plate (9). A wiring harness channel (30) is provided at the front end of the injection cavity (31). A plugging hole (29) is provided at the front end of the wiring harness channel (30), and the center of the cylinder formed by the arc-shaped rubber block (28) and the center of the plugging hole (29) on the lower mold plate (9) are kept on the same straight line. After closing, the outlet end of the wiring harness channel (30) is sealed. An extrusion mechanism (7) is fixedly installed at the center position of the upper end surface of the upper mold mechanism (8), and the discharge port of the extrusion mechanism (7) is connected to the injection cavity (31) of the upper mold plate (13).

2. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 1, characterized in that: The elastic support mechanism includes an extension plate (23), the rear end of the extension plate (23) is plugged and fixed to the lifting plate (12), and support mechanisms (24) are fixedly installed on both sides of the interior of the extension plate (23), a telescopic plate (25) extending downward is slidably installed in the inner cavity of the support mechanism (24), and the bottom of the telescopic plate (25) is fixed to the upper movable frame (15) by screws, and a support spring is fixedly installed between the inner cavity of the support mechanism (24) and the upper end of the telescopic plate (25).

3. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 2, characterized in that: The rack mechanism includes a first rack plate (19), which is arranged on both sides of the upper movable frame (15), and the upper end of the first rack plate (19) is plugged and fixed to the upper movable frame (15), one end of the shaft of the internal roller (16) of the lower fixed frame (14) extends to the outside of the upper movable frame (15), and one end of the shaft of the internal roller (16) of the lower fixed frame (14) is fixedly installed with a first driven gear (18), and the first driven gear (18) is meshed and connected with the first rack plate (19), and a groove for the first rack plate (19) to extend downward is reserved on the base (1).

4. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 3, characterized in that: The rack mechanism further comprises a second rack plate (20), the second rack plate (20) being arranged at the rear end of the first rack plate (19), and the second rack plate (20) and the first rack plate (19) being integrally formed, a second driven gear (22) being arranged on one side of the hole blocking mechanism (21), and the second driven gear (22) being meshed and connected with the second rack plate (20), a stud (35) being rotatably installed in the middle slide groove of the hole blocking mechanism (21), a sliding block (34) being installed on the outside of the stud (35), and the upper end of the sliding block (34) being in contact with the displacement mechanism The bottom of the structure (26) is fixed, and the sliding block (34) and the internal sliding groove of the hole blocking mechanism (21) are slidably limited, the external thread of the stud (35) is connected to the internal screw hole of the sliding block (34) through a thread, and one end of the shaft of the second driven gear (22) is fixedly provided with a connecting shaft (42), the connecting shaft (42) extends to the inside of the hole blocking mechanism (21), and the connecting shaft (42) is connected to the hole blocking mechanism (21) through a bearing, and the end of the connecting shaft (42) located inside the hole blocking mechanism (21) is connected to the front end of the stud (35) through a bevel gear transmission.

5. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 4, characterized in that: The clamping mechanism (27) includes a threaded disk (36), and the threaded disk (36) is rotatably connected to the displacement mechanism (26) through a bearing. The rear end of the threaded disk (36) is provided with four annularly distributed limiting movable blocks (37), and the limiting threads on the front end faces of the limiting movable blocks (37) are engaged with the plane threads on the contact end face of the threaded disk (36). The rear wall of the clamping mechanism (27) is provided with four annularly distributed guide grooves (43), and the limiting movable blocks (37) pass through the guide grooves (43) and are fixed to the arc-shaped rubber blocks (28), and the limiting movable blocks (37) and the guide grooves (43) are slidably limited.

6. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 5, characterized in that: A third rack plate (32) is fixedly provided on both sides of the upper end surface of the hole blocking mechanism (21); a transmission rod (39) is rotatably installed below the interior of the displacement mechanism (26); transmission gears (41) are fixedly installed at both ends of the transmission rod (39), and the transmission gear (41) is meshedly connected with the third rack plate (32); a worm (40) is installed below the transmission rod (39) corresponding to the threaded disk (36), and the worm (40) and the transmission rod (39) are plugged and limited; a worm wheel (38) is fixedly installed on the outer ring of the threaded disk (36), and the external thread of the worm wheel (38) is adapted to the worm wheel (40).

7. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 6, characterized in that: Transmission devices (6) are installed on both sides of the upper end surface of the top plate (3), and the transmission device (6) includes a dual-axis synchronous servo motor arranged at an internal middle position, and the output shafts of the dual-axis synchronous servo motor are both connected to the upper end shaft of the screw rod (10) through bevel gears.

8. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 7, characterized in that: Doors (4) are installed on both sides of the front end of the shell (2), and the door (4) is connected to the shell (2) via a hinge (5).

9. An injection molding method for an automotive electronic vacuum pump wiring harness according to claim 8, characterized in that: The steps include: Step 1: In the initial state, the upper mold mechanism (8) is located at a high position, the wire harness guide mechanism (11) is in an open structure, and the staff places the automobile vacuum pump wire harness in the positioning groove (17) of the lower roller (16), and inserts one end of the wire harness into the wire harness through hole (33) of the displacement mechanism (26); Step 2: Under the drive of the transmission device (6), the four screw rods (10) are rotated synchronously, and the upper template (13) is driven to move toward the lower template (9) under the friction of the threads of the sliders at the four corners of the lifting plate. During the downward movement, the roller (16) inside the upper movable frame (15) is preferentially close to the roller (16) of the lower fixed frame (14) below, and the upper and lower positioning grooves (17) contact and wrap the wire harness. As the extension plate (23) continues to descend, the first rack plate (19) is driven to descend, meshing with the first driven gear (18), driving the roller (16) inside the lower fixed frame (14) to rotate, so that during the downward movement of the lifting plate (12), the wire harness extends toward the inside of the template molding cavity; Step 3: During the extension process, the second rack plate (20) at the rear end of the first rack plate (19) engages with the second driven gear (22) on the side of the hole blocking mechanism (21), driving the connecting shaft (42) to rotate, and the stud (35) is driven to rotate under the transmission of the two bevel gears, and the sliding block (34) drives the displacement mechanism (26) to move toward the template; Step 4: During the movement of the displacement mechanism, the transmission gears (41) on both sides of the transmission rod (39) engage with the third rack plates (32) on both sides of the upper end surface of the blocking mechanism (21), driving the transmission rod (39) to rotate, and the worm on the outside of the transmission rod (39) cooperates with the worm gear on the outer wall of the threaded disk (36), driving the threaded disk (36) to rotate, and the limiting thread on the rear end surface of the limiting movable block (37) engages with the plane thread on the contact end surface of the threaded disk (36). The rotation of the plane thread drives the limiting movable block (37) to move along the direction of the guide groove (43), so that the multiple arc-shaped rubber blocks (28) move synchronously toward the surface of the wiring harness until the surface of the wiring harness is clamped and fixed. Subsequently, the column formed by the clamped arc-shaped rubber block (28) enters the blocking hole (29) to block the entrance of the wiring harness channel (30); Step 5: Finally, the upper mold plate (13) and the lower mold plate (9) are closed, and hot melt plastic can be injected into the injection cavity (31) through the extrusion mechanism (7) to achieve the injection molding of the wire harness.

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