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

Abstract

The invention discloses injection molding equipment for an automobile electronic vacuum pump wire harness and an injection molding method of the injection molding equipment. The injection molding equipment comprises a base, and a lower mold plate is mounted on the upper end face of the base; the upper die mechanism is arranged in the shell, and the upper die mechanism is composed of a lifting plate and an upper die plate; the wire harness guiding mechanism is arranged on the front side of the upper end face of the base, rotating rollers are installed in the lower fixed frame and the upper movable frame, and an elastic supporting mechanism connected with a lifting plate is installed above the upper movable frame; the hole blocking mechanism is arranged behind the wire harness guide mechanism, a displacement mechanism is installed above the hole blocking mechanism and translates front and back along with lifting of the upper movable frame, a clamping mechanism is installed in the displacement mechanism, and an arc-shaped rubber block is clamped and loosened along with front and back translation of the displacement mechanism. The problem that after wrinkles on the surface of an automobile wire harness enter a wire harness injection molding channel, a gap is likely to be generated between the outer wall and a channel cavity is solved.

Description

Technical Field

[0001] The 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] The injection molding equipment for automotive electronic vacuum pump wiring harness is a kind of equipment specially used for producing automotive electronic vacuum pump wiring harness. It combines the characteristics of injection molding process and wiring harness manufacturing, and can efficiently and accurately complete the injection molding and wrapping of wiring harness. The injection molding machine is the core part of the injection molding system, which is responsible for injecting the molten plastic material into the mold. The injection molding machine needs to have 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 to ensure that the wiring harness will not shake during the injection molding process; the outer mold includes the upper mold and the lower mold, which are combined to form an injection molding cavity to wrap the molten plastic material on the wiring harness. Generally, the wiring harness is placed in the inner mold of the injection molding equipment and fixed, and the outer mold is closed to form an injection molding cavity. The injection molding machine injects the molten plastic material into the injection molding cavity through the channel port and wraps it on the wiring harness. The cooling system is started to cool the wiring harness shell after injection molding. The mold is opened and the injection-molded automotive electronic vacuum pump wiring harness is taken out.

[0003] For example, the Chinese authorized patent with announcement number CN115946298A, "Injection molding equipment and processing technology for automotive electronic vacuum pump wiring harness", 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, and the upper mold and the lower mold are combined to form an injection molding cavity. The injection molding cavity is used to wrap the outer periphery of the connection between the wire and the terminal placed therein with an insulating shell, and the upper mold is provided with a channel opening, which is connected to the injection molding cavity. The terminal is fixed by the inner mold, and the connection between the terminal and the wire placed in the injection molding cavity is injection molded.

[0004] Although the above-mentioned prior art realizes the injection molding of automobile wiring harnesses, it is affected by the processing technology of the wiring harnesses themselves, 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 the 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 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 object, the present invention provides the following technical solution: an injection molding device for automotive electronic vacuum pump wiring harness, comprising a base, a shell is welded and fixed to the outer edge of the upper end of the base, a top plate is welded and fixed to the top end of the shell, a lower mold plate is installed on the upper end surface of the base, and the lower mold plate is fixed to the base by bolts; and further comprising:

[0007] An upper mold mechanism is arranged inside the shell, the upper mold mechanism is composed of a lifting plate and an upper mold plate, and the upper mold plate is fixed below the lifting plate by bolts, and screw sliders are installed at the four corners of the upper mold plate, and a screw rod penetrates the inside 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 arranged at the front side of the upper end surface of the base, the wire harness guide mechanism comprises a lower fixed frame, and the bottom of the lower fixed frame is fixed to the base, an upper movable frame is arranged above the lower fixed frame, rollers are installed inside the lower fixed frame and the upper movable frame, an elastic support mechanism connected to the lifting plate is installed above the upper movable frame, and a positioning groove is arranged on the surface of the roller;

[0009] A hole blocking mechanism is arranged at the rear of the wire harness guiding mechanism, a displacement mechanism is installed above the hole blocking mechanism, the displacement mechanism is connected to the wire harness guiding mechanism through a rack mechanism, and is translated forward and backward as the upper movable frame is lifted and lowered, a clamping mechanism is installed inside the displacement mechanism, a wire harness through hole is arranged at the center of the clamping mechanism, and four arc-shaped rubber blocks equidistantly distributed in a ring shape are arranged at the rear end of the clamping mechanism, the arc-shaped rubber blocks are concentric circles, and the arc-shaped rubber blocks are clamped and released as the displacement mechanism is translated forward and backward.

[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, the support mechanism is fixedly installed on both sides of the interior of the extension plate, a telescopic plate extending downward 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 a first driven gear is fixedly installed on one end of the rotating roller shaft inside the lower fixed frame, 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 arranged on one side of the blocking mechanism, and the second driven gear is meshingly connected 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 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 with the slide groove inside the blocking mechanism, the external thread of the stud is connected to the internal screw hole of the sliding block by a thread, a connecting shaft is fixedly provided at one end of the second driven gear 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 via a bearing, the rear end of the threaded disk is provided with four annularly distributed limit movable blocks, and the limit thread on the front end face of the limit movable block is meshed 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 limit movable block passes through the guide groove and is fixed to the arc-shaped rubber block, and the limit 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 meshingly connected with the third rack plate, a worm is installed below the threaded disk corresponding to 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.

[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 circle 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 surface 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 double-axis synchronous servo motor arranged at an internal middle position, and the output shafts of the double-axis synchronous servo motor are connected to the upper end shaft of the screw rod through bevel gears.

[0017] Preferably, both sides of the front end of the shell are equipped with doors, and the doors are connected to the shell by 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 at a high position, and the harness guide mechanism is in an open structure. The staff places the automotive vacuum pump harness in the positioning groove of the lower roller and inserts one end of it into the harness through hole of the displacement mechanism;

[0020] Step 2: Driven by the transmission device, the four screw rods are rotated synchronously, and the upper template is driven to move 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 is preferentially close to 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 molding 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, and driving the stud to rotate under the transmission of the two bevel gears, and cooperating with the sliding block to drive 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 meshed 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, and the limiting thread on the rear end surface of the limiting movable block is meshed with the plane thread on the contact end surface of the threaded disk. The rotation of the plane thread drives the limiting movable block to move along the direction of the guide groove, so that 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 block the entrance of the wiring harness channel;

[0023] Step 5. Finally, the upper mold plate and the lower mold plate are molded together, 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 automotive 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 screws are rotated synchronously, and the rotational motion is converted 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 rollers inside the upper movable frame preferentially contact the rollers of the lower fixed frame, and 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 is continuously increased, 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 moving frame, the first rack plate will also be driven down, and the first rack plate will be meshed with the first driven gear, driving the roller inside the lower fixed frame to rotate, so that during the downward movement of the lifting plate, the wire harness can be 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 molding, 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 guiding 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 thread 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 surface of the blocking mechanism, thereby driving the transmission rod to rotate. Two worms are respectively arranged 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, and the rotation of the worm drives the worm wheel to rotate, and then the worm wheel drives the threaded disk to rotate. Since the limiting thread on the rear end face of the limiting movable block is meshed with the plane thread on the contact end face of the threaded disk, the rotation of the plane thread drives the limiting movable block to move along the direction of the guide groove, so that multiple arc-shaped rubber blocks are synchronously moved 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 block the entrance of the wiring harness channel, so as to avoid the wrinkles on the surface of the automobile wiring harness. After entering the wiring harness injection 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, the structure cooperates synchronously 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 stereogram 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 schematic diagram of the side structure of the extrusion mechanism and the hole blocking mechanism of the present invention;

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

[0032] Figure 6 It is a 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, shell; 3, top plate; 4, box door; 5, hinge; 6, transmission device; 7, extrusion mechanism; 8, upper mold mechanism; 9, lower mold plate; 10, screw rod; 11, wire harness guide mechanism; 12, lifting plate; 13, upper mold 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 rubber block; 29. ​​Blocking hole; 30. Wire harness channel; 31. Injection cavity; 32. Third rack plate; 33. Wire harness through hole; 34. Sliding block; 35. Stud; 36. Threaded disk; 37. Limiting movable block; 38. Worm wheel; 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 described clearly and completely 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: an injection molding device for automotive electronic vacuum pump wiring harness, comprising a base 1, a shell 2 is welded and fixed to the outer edge of the upper end of the base 1, a top plate 3 is welded and fixed to the top of the shell 2, a lower template 9 is installed 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 is composed of a lifting plate 12 and an upper mold plate 13. The upper mold plate 13 is fixed below the lifting plate 12 by bolts. Screw sliders are installed at the four corners of the upper mold plate 13. A screw rod 10 runs through the inside of the screw slider. 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 at the front side of the upper end surface of the base 1, and 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, and 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, and an elastic support mechanism connected to the lifting plate 12 is installed above the upper movable frame 15, and a positioning groove 17 is arranged on the surface of the roller 16;

[0039] The hole blocking mechanism 21 is arranged at the rear of the wire harness guiding mechanism 11. A displacement mechanism 26 is installed above the hole blocking mechanism 21. The displacement mechanism 26 is connected to the wire harness guiding mechanism 11 through a rack mechanism, and is translated forward and backward 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 arranged at the center of the clamping mechanism 27. Four arc-shaped rubber blocks 28 are equidistantly distributed in a ring shape at the rear end of the clamping mechanism 27. The arc-shaped rubber blocks 28 are concentric circles. The arc-shaped rubber blocks 28 are clamped and released as the displacement mechanism 26 is translated forward and backward.

[0040] The wire harness guiding mechanism 11 can not only realize the automatic conveying of the wire harness, but also ensure the stability of the wire harness during the conveying process, and at the same time ensure that the end of the wire harness is in contact with the top of the injection cavity, ensuring the consistency of the end length after injection molding, 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. 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, resulting in the problem of material overflow during the injection molding process, and the structure is synchronized with the wire harness guiding mechanism 11 and the upper mold mechanism 8, 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 with the lifting plate 12, and support mechanisms 24 are fixedly installed on both sides of the interior of the extension plate 23. A downwardly 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 contacts the wiring harness first, and 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 4The 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 with the upper movable frame 15, one end of the shaft of the rotating roller 16 inside the lower fixed frame 14 extends to the outside of the upper movable frame 15, and a first driven gear 18 is fixedly installed on one end of the shaft of the rotating roller 16 inside the lower fixed frame 14, 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 accordingly. Since the first rack plate 19 and the first driven gear 1 8 meshes, so the first driven gear 18 will rotate with the descent of the first rack plate 19, and the rotation of the first driven gear 18 will drive the roller 16 inside the lower fixed frame 14 to rotate, so that the wire harness between the upper and lower rollers 16 can be smoothly transported to the inside of the template molding cavity. A groove extending downward from the first rack plate 19 is reserved on the base 1. This groove provides enough space for the descent of the first rack plate 19 and ensures the smooth transmission process. The rack mechanism realizes the synchronous transmission between the upper movable frame 15 and the roller 16 inside the lower fixed frame 14 through the meshing 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 transportation process.

[0043] See also Figure 4 , Figure 5 and Figure 7The rack mechanism also includes a second rack plate 20, which 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. A second driven gear 22 is arranged on one side of the blocking hole mechanism 21, and the second driven gear 22 is meshed and connected with the second rack plate 20. A stud 35 is rotatably installed in the slide groove in the middle of the blocking hole 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 hole mechanism 21. The external thread of the stud 35 is threadedly connected with the internal screw hole of the sliding block 34. A connecting shaft 42 is fixedly provided at one end of the shaft of the second driven gear 22, and the connecting shaft 42 extends to the inside of the blocking hole mechanism 21, and the connecting shaft 42 is connected to the blocking hole mechanism 21 through a bearing. One end of the connecting shaft 42 located inside the blocking hole mechanism 21 is connected to the front end of the stud 35 through a bevel gear transmission. When the upper When the template 13 descends under the drive of the screw rod 10, the first rack plate 19 descends accordingly and meshes 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 meshes 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 automated process of wire harness guiding, hole blocking and injection molding, reduces manual intervention, improves production efficiency and product quality stability, and can achieve precise movement and positioning of the displacement mechanism 26 and the hole blocking mechanism 21 through precise control of the rack mechanism and gear transmission, 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 blocks 37 are meshed with the plane threads on the contact end surface of the threaded disk 36. Four annularly distributed guide grooves 43 are provided on the rear wall of the clamping mechanism 27. 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 are slidably limited with the guide grooves 43. When the displacement mechanism 26 moves toward the template direction under the drive of the rack mechanism, the transmission gear 41 on the transmission rod 39 is meshed 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, and the rotation of the threaded disk 36 makes The planar 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 planar 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 accurately controlled, thereby ensuring the accuracy and consistency of the clamping of the wiring harness. 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 has a soft material that can avoid damage to the surface of the wiring harness during the clamping process, thereby protecting the integrity and performance of the wiring harness.

[0045] See also Figure 3 and Figure 6A third rack plate 32 is fixedly arranged on both sides of the upper end surface of the hole blocking mechanism 21, a transmission rod 39 is rotatably installed at the lower part of the displacement mechanism 26, and transmission gears 41 are fixedly installed at both ends of the transmission rod 39, and the transmission gear 41 is meshed and 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 is plugged and limited with the transmission rod 39, a worm wheel 38 is fixedly installed on the outer ring of the threaded disk 36, and the outer 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 surface will move accordingly, and the transmission gears 41 at both ends of the transmission rod 39 will mesh 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 keep synchronous rotation, and the rotation of the worm 40 further drives the worm wheel 38 meshing with it to rotate. Since the worm wheel 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 mesh 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. 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 3, the lower mold plate 9 and the upper mold plate 13 both include an injection molding cavity 31, and the injection molding cavity 31 is arranged inside the lower mold plate 9, the front end of the injection molding cavity 31 is provided with a harness channel 30, the front end of the 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 mold plate 9, and the outlet end of the harness channel 30 is closed after closing, and the 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 molding cavity 31 of the upper mold plate 13. When the lower mold plate 9 and the upper mold plate 13 are molded, the injection molding cavity 31 inside them will form a closed injection molding space. This injection molding space is used to accommodate hot-melt plastic to realize the injection molding of the harness, and the front end of the injection molding cavity 31 is provided with a harness channel 30, which is used to guide the harness into the injection molding cavity 31. The design of the harness channel 30 ensures the position stability and accuracy of the harness during the injection molding process. The front end of the harness channel 30 is provided with a plugging hole 29, which plays a key role in the injection molding process. When the arc-shaped rubber block 28 moves toward the harness surface and clamps under the drive of the clamping mechanism 27, they will form a cylinder that matches the plugging hole 29, thereby closing the outlet end of the 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 setting the injection molding cavity 31 and the harness channel 30, the position stability and accuracy of the 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 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 it into the wire harness through hole 33 of the displacement mechanism 26;

[0049] Step 2: Driven by 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, 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 meshes with the second driven gear 22 on the side of the hole blocking mechanism 21, driving the connecting shaft 42 to rotate, and driving the stud 35 to rotate under the transmission of the two bevel gears, and cooperating with the sliding block 34 to drive 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 mesh 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 wheel 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 meshes 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;

[0052] Step 5: Finally, the upper mold plate 13 and the lower mold plate 9 are molded together, 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 invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered 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) being welded and fixed to the outer edge of the upper end of the base (1), a top plate (3) being welded and fixed to the top end of the housing (2), a lower mold plate (9) being installed on the upper end surface of the base (1), and the lower mold plate (9) being fixed to the base (1) by bolts; Features: Also includes: An upper mold mechanism (8) is arranged inside the housing (2), 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 below 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 guiding mechanism (11) is arranged on the front side of the upper end surface of the base (1), the wire harness guiding mechanism (11) comprises a lower fixed frame (14), 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), a roller (16) is installed inside the lower fixed frame (14) and the upper movable frame (15), an elastic supporting mechanism connected to the lifting plate (12) is installed above the upper movable frame (15), and a positioning groove (17) is arranged on the surface of the roller (16); A hole blocking mechanism (21) is arranged at the rear of the wire harness guiding mechanism (11), a displacement mechanism (26) is installed above the hole blocking mechanism (21), the displacement mechanism (26) is connected to the wire harness guiding mechanism (11) through a rack mechanism, and moves forward and backward along 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 arranged at the center of the clamping mechanism (27), and four arc-shaped rubber blocks (28) are arranged at equal distances in a ring shape 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) are clamped and released along with the forward and backward translation of the displacement mechanism (26).

2. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 1, characterized in that: The elastic support mechanism comprises an extension plate (23), the rear end of the extension plate (23) is plugged and fixed to the lifting plate (12), 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 comprises a first rack plate (19), the first rack plate (19) being arranged on both sides of the upper movable frame (15), and the upper end of the first rack plate (19) being 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) extending to the outside of the upper movable frame (15), and a first driven gear (18) being fixedly installed on one end of the shaft of the internal roller (16) of the lower fixed frame (14), and the first driven gear (18) being meshingly 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 meshingly connected with the second rack plate (20), a stud (35) being rotatably installed in a slide groove in the middle of the hole blocking mechanism (21), a sliding block (34) being installed outside the stud (35), and the upper end of the sliding block (34) being connected to the displacement mechanism The bottom of the hole blocking mechanism (26) is fixed, and the sliding block (34) is slidably limited with the internal sliding groove of the hole blocking mechanism (21), the external thread of the stud (35) is connected to the internal threaded 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 one 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) comprises a threaded disc (36), and the threaded disc (36) is rotatably connected to the displacement mechanism (26) via a bearing. The rear end of the threaded disc (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 meshed with the plane threads on the contact end faces of the threaded disc (36). The rear wall of the clamping mechanism (27) is provided with four annularly distributed guide grooves (43), 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 arranged on both sides of the upper end surface of the hole blocking mechanism (21); a transmission rod (39) is rotatably installed at the lower part 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 meshingly 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 matched with the worm wheel (40).

7. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 6, characterized in that: The lower mold plate (9) and the upper mold plate (13) both include an injection molding cavity (31), and the injection molding cavity (31) is arranged inside the lower mold plate (9). A wiring harness channel (30) is arranged at the front end of the injection molding cavity (31), and a plugging hole (29) is arranged at the front end of the wiring harness channel (30). The center of the circle 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, so that the outlet end of the wiring harness channel (30) is sealed after closing. 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 molding cavity (31) of the upper mold plate (13).

8. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 7, 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 double-axis synchronous servo motor arranged at an internal middle position, and the output shafts of the double-axis synchronous servo motor are both connected to the upper end shaft of the screw rod (10) through bevel gears.

9. The injection molding equipment for automotive electronic vacuum pump wiring harness according to claim 1, characterized in that: Box doors (4) are installed on both sides of the front end of the shell (2), and the box doors (4) are connected to the shell (2) via hinges (5).

10. An injection molding method for an injection molding device for an automotive electronic vacuum pump wiring harness according to claim 9, 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: Driven by 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) preferentially approaches the roller (16) of the lower fixed frame (14), 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) meshes with the second driven gear (22) on the side of the hole blocking mechanism (21), driving the connecting shaft (42) to rotate, and driving the stud (35) to rotate under the transmission of the two bevel gears, and cooperating with the sliding block (34) to drive 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) mesh 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 wheel 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) meshes 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 molded together, and hot melt plastic can be injected into the injection cavity (31) through the extrusion mechanism (7) to achieve injection molding of the wire harness.

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