A sensor harness bracket injection mold

Abstract

This invention relates to an injection mold for a sensor wiring harness bracket, and proposes an innovative solution to address the poor synchronization of traditional guide post slider core-pulling schemes. The mold includes a front mold, a rear mold, and a core-pulling mechanism. The core-pulling mechanism employs a collinear inclined double core-pulling assembly, which uses a single linear driver to drive a linkage plate and a gear and rack transmission system to achieve precise synchronous reverse movement of the core-pulling action on both sides. Specifically, the core-pulling plates of the first and second core-pulling assemblies are arranged along the same inclined line within the horizontal plane of the moving template, with their axes coinciding with the axis of the mold core side hole. The linkage plate engages with a transmission gear through an active rack segment, driving the driven rack segment to drive the second core-pulling assembly in the opposite direction, ensuring mechanically forced synchronization of the core-pulling action. This invention achieves synchronous core-pulling on both sides through a mechanical linkage structure, improving the synchronization rate and reducing time deviation.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold for a sensor wire harness bracket. Background Technology

[0002] In the field of precision injection molding, for sensor harness brackets with lateral hole features, traditional technology generally adopts a core-pulling solution combining guide pillars and sliders, such as... Figure 9 As shown, this is a schematic diagram of a sensor harness bracket, with side holes on its sidewalls. This type of solution controls the linear movement of the slider by adjusting the tilt angle of the guide post, thus achieving lateral core pulling. However, with increasing product precision requirements and the application of complex structures, this technical approach has revealed the following significant drawbacks: the power transmission between the guide post and the slider relies on sliding friction, which easily leads to increased clearance due to wear after long-term operation; dual-sided core pulling requires independently set guide post and slider mechanisms, lacking a mechanical linkage forced synchronization mechanism. In actual production, due to machining errors and assembly gap differences, the core pulling speed deviation on both sides can reach 15%-20%, resulting in asynchronous core pulling actions on both sides. These defects severely restrict the mass production of high-precision sensor harness brackets. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a sensor harness bracket injection mold.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a sensor wiring harness bracket injection mold, comprising a front mold, a rear mold, and a core-pulling mechanism. The front mold has a fixed template and a cavity formed on the fixed template. The rear mold has a movable template and a core fixed on the movable template. When the core and the cavity are closed, a molding cavity matching the shape of the sensor wiring harness bracket is formed. The core-pulling mechanism comprises: a first core-pulling assembly and a second core-pulling assembly disposed on both sides of the movable template, each core-pulling assembly having a core-pulling element corresponding to a side hole of the wiring harness bracket; a linear actuator fixed on the movable template, the output end of which is rigidly connected to the first core-pulling assembly; and a sliding assembly. A linkage plate, fitted in the guide groove of the moving template, slides parallel to the core-pulling direction of the core-pulling element. One end of the linkage plate is connected to the output end of the linear actuator. An active rack segment is located at the free end of the linkage plate. A transmission gear is pivotally connected to the moving template, which simultaneously meshes with both the active and driven rack segments. The driven rack segment is rigidly connected to the second core-pulling assembly, and its tooth direction is opposite to that of the active rack segment. When the linear actuator drives the first core-pulling assembly to perform the core-pulling action, the linkage plate drives the active rack segment to move, drives the transmission gear to rotate, and drives the driven rack segment to move in the opposite direction, thereby realizing the synchronous reverse core-pulling of the second core-pulling assembly.

[0005] As a preferred embodiment of the present invention, the core-pulling element is configured as a core-pulling plate, and the core-pulling plates of the first core-pulling assembly and the second core-pulling assembly are arranged along the same inclined line in the horizontal plane of the moving template. The core-pulling plate has a forming block corresponding to the side hole of the sensor wire harness bracket, and the contour of the forming block matches the side hole of the sensor wire harness bracket.

[0006] As a preferred embodiment of the present invention, the moving template is provided with a first mounting groove and a second mounting groove extending along the inclined line, and the core-pulling plates of the first core-pulling assembly and the second core-pulling assembly are respectively slidably assembled in the corresponding mounting grooves.

[0007] As a preferred embodiment of the present invention, each mounting slot is provided with a detachable receiving plate, and the receiving plate is provided with guide bosses on both sides. The core-pulling plate is restricted within the sliding path of the receiving plate by a pressure plate, and a guide gap is formed between the pressure plate and the core-pulling plate.

[0008] As a preferred embodiment of the present invention, the receiving plate of the first core-pulling assembly is provided with a connecting block at its end, the output end of the linear driver is connected to the outside of the connecting block, one end of the linkage plate is fixed to the inside of the connecting block, the core-pulling plate of the first core-pulling assembly is connected to the connecting block by fasteners, and the linkage plate and the core-pulling plate are staggered in the vertical direction.

[0009] As a preferred embodiment of the present invention, the moving template is provided with an inclined slide groove corresponding to the position of the linear driver, and the output end of the linear driver passes through the inclined slide groove and is connected to the linkage plate.

[0010] As a preferred embodiment of the present invention, the receiving plate of the second core-pulling assembly is provided with a positioning hole, a U-shaped bearing is fixed in the positioning hole, a rotating shaft is provided in the U-shaped notch of the bearing, the two ends of the rotating shaft are rotatably mounted on the bearing via bearings, the transmission gear is fixed on the rotating shaft, the linkage plate extends into the U-shaped notch of the bearing, and the driving rack segment and the driven rack segment are respectively located on the upper and lower sides of the transmission gear.

[0011] As a preferred embodiment of the present invention, the front mold further includes a pad plate stacked on top of the fixed template. The pad plate and the fixed template are fixedly connected and have grooves on their respective end faces that are in contact with each other. The two grooves enclose a closed cavity with a rectangular cross-section. A pusher assembly is provided in the closed cavity. The pusher assembly includes a movable plate and a mounting plate. Guide pillars are fixedly connected to the four corners of the mounting plate. The mold closing end face of the fixed template is provided with guide holes for clearance fit with the guide pillars. A plurality of ejector pins penetrating the fixed template are provided on the mounting plate, and the ejector pins are parallel to the normal direction of the mold cavity forming surface. The movable plate is located above the mounting plate, and a plurality of mounting holes are arrayed on its end face facing away from the mounting plate. A compression spring is provided in each mounting hole, and the two ends of the compression spring are fixed to the movable plate and the top of the closed cavity, respectively.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] By employing a mechanical linkage design that drives the linkage plate and gear rack transmission system with a single linear actuator, the reverse synchronous movement of the double-sided core-pulling components is forced, eliminating the motion deviation caused by traditional independent drives. The core-pulling plate, arranged collinearly and inclined, along with mounting grooves extending along the inclined line, reconstructs the core-pulling path in the horizontal plane. Compared to traditional guide pillar and slider solutions, the lateral projected area of ​​the mold is reduced, making it suitable for forming deep and long side holes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the rear mold structure in this invention;

[0015] Figure 2 This is a schematic diagram of the front mold structure in this invention;

[0016] Figure 3 This is a schematic diagram of the core-pulling mechanism in this invention;

[0017] Figure 4 This is a schematic diagram of the bottom structure of the core-pulling mechanism in this invention;

[0018] Figure 5 This is a partial structural schematic diagram of the second core-pulling assembly in this invention;

[0019] Figure 6 This is a schematic diagram of the mold closing end face structure of the front mold in this invention;

[0020] Figure 7 This is a schematic diagram of the structure of the AA of the present invention;

[0021] Figure 8 This is a schematic diagram of the core-pulling element in this invention;

[0022] Figure 9 This is a schematic diagram of the sensor harness support structure in the background technology.

[0023] Reference numerals: 1. Front mold; 2. Rear mold; 3. Fixed template; 4. Mold cavity; 5. Moving template; 6. Mold core; 7. First core-pulling assembly; 8. Second core-pulling assembly; 9. Linear actuator; 10. Core-pulling element; 11. Linkage plate; 12. Driving rack segment; 13. Transmission gear; 14. Driven rack segment; 15. Core-pulling plate; 16. Molding block; 17. First mounting groove; 18. Second mounting groove; 19. Receiving plate; 20. Guide boss; 21. Pressure plate; 22. Connecting block; 23. Inclined slide; 24. Positioning hole; 25. Shaft seat; 26. Rotating shaft; 27. Pad plate; 28. Groove; 29. ​​Enclosed cavity; 30. Pushing assembly; 31. Movable plate; 32. Mounting plate; 33. Guide post; 34. Guide hole; 35. Ejector pin; 36. Mounting hole; 37. Compression spring; 38. Sensor harness bracket. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] like Figure 1-9The injection mold for a sensor harness bracket shown includes a front mold 1, a rear mold 2, and a core-pulling mechanism. The front mold 1 has a fixed template 3 and a cavity 4 opened on the fixed template 3. The rear mold 2 has a movable template 5 and a core 6 fixed on the movable template 5. When the core 6 and the cavity 4 are closed, a molding cavity matching the shape of the sensor harness bracket 38 is formed. The core-pulling mechanism includes: a first core-pulling assembly 7 and a second core-pulling assembly 8 disposed on both sides of the movable template 5. Each core-pulling assembly is provided with a core-pulling element 10 corresponding to the side hole of the harness bracket; a linear actuator 9 (cylinder, electric cylinder, hydraulic cylinder, etc.) fixed on the movable template 5, the output end of which is rigidly connected to the first core-pulling assembly 7; and a linkage plate 11 slidably assembled in the guide groove of the movable template 5, the sliding direction of which is parallel to the core-pulling direction of the core-pulling element 10, one end of which is connected to the output end of the linear actuator 9. The active rack segment 12 is located at the free end of the linkage plate 11; the transmission gear 13 is pivotally connected to the moving template 5, and the transmission gear 13 simultaneously meshes with the active rack segment 12 and the driven rack segment 14; the driven rack segment 14 is rigidly connected to the second core-pulling assembly 8, and its tooth direction is set opposite to that of the active rack segment 12; when the linear actuator 9 drives the first core-pulling assembly 7 to perform the core-pulling action, the active rack segment 12 is moved through the linkage plate 11, which drives the transmission gear 13 to rotate and drives the driven rack segment 14 to move in the opposite direction, thereby realizing the synchronous reverse core-pulling of the second core-pulling assembly 8. In this embodiment, the ejection mechanism of the moving template 5 and the other necessary templates of the injection mold are all existing technologies and are relatively mature in the market, so this application will not describe them in detail. The core of this invention lies in the double-sided core-pulling mechanism, and the other unmentioned casting, cooling and water system are all existing designs.

[0027] By using the mechanical linkage design of the single linear driver 9 to drive the linkage plate 11 and the gear and rack transmission system, the reverse synchronous movement of the double-sided core-pulling components is forced to be realized, eliminating the motion deviation caused by traditional independent drive. Under the same drive stroke, the effective core-pulling stroke is increased by 40% (when θ=45°), breaking through the stroke limitation of traditional guide post 33 core-pulling.

[0028] The core-pulling element 10 is configured as a core-pulling plate 15. The core-pulling plates 15 of the first core-pulling assembly 7 and the second core-pulling assembly 8 are arranged along the same inclined line in the horizontal plane of the moving template 5. The core-pulling plate 15 has a forming block 16 corresponding to the side hole of the sensor wiring harness bracket 38. The contour of the forming block 16 matches the side hole of the sensor wiring harness bracket 38. By using the collinear inclined arrangement of the core-pulling plates 15 and the mounting groove extending along the inclined line, the core-pulling path is reconstructed in the horizontal plane. Compared with the traditional guide post 33 slider solution, the lateral projection area of ​​the mold is reduced, which is suitable for the forming requirements of deep and long side holes.

[0029] The moving template 5 is provided with a first mounting groove 17 and a second mounting groove 18 extending along the inclined line, and the core-pulling plates 15 of the first core-pulling assembly 7 and the second core-pulling assembly 8 are respectively slidably assembled in the corresponding mounting grooves.

[0030] Each mounting slot is provided with a detachable receiving plate 19. The receiving plate 19 has guide bosses 20 on both sides. The core-pulling plate 15 is restricted within the sliding path of the receiving plate 19 by the pressure plate 21, and a guide gap is formed between the pressure plate 21 and the core-pulling plate 15.

[0031] The receiving plate 19 of the first core-pulling assembly 7 is provided with a connecting block 22 at its end. The output end of the linear driver 9 is connected to the outside of the connecting block 22. One end of the linkage plate 11 is fixed to the inside of the connecting block 22. The core-pulling plate 15 of the first core-pulling assembly 7 is connected to the connecting block 22 by fasteners, and the linkage plate 11 and the core-pulling plate 15 are arranged in a staggered manner in the vertical direction.

[0032] The moving template 5 is provided with an inclined slide groove 23 corresponding to the position of the linear driver 9. The output end of the linear driver 9 passes through the inclined slide groove 23 and is connected to the linkage plate 11.

[0033] The receiving plate 19 of the second core-pulling assembly 8 is provided with a positioning hole 24. A U-shaped bearing seat 25 is fixed in the positioning hole 24. A rotating shaft 26 is provided in the U-shaped notch of the bearing seat 25. The two ends of the rotating shaft 26 are rotatably mounted on the bearing seat 25 through bearings. The transmission gear 13 is fixed on the rotating shaft 26. The linkage plate 11 extends into the U-shaped notch of the bearing seat 25, and the driving rack section 12 and the driven rack section 14 are located on the upper and lower sides of the transmission gear 13, respectively.

[0034] The front mold 1 also includes a pad 27 stacked on top of the fixed mold plate 3. The pad 27 and the fixed mold plate 3 are fixedly connected and fit together. A groove 28 is opened on one end face of the two grooves 28, and the two grooves 28 enclose a closed cavity 29 with a rectangular cross-section. A pusher assembly 30 is provided in the closed cavity 29. The pusher assembly 30 includes a movable plate 31 and a mounting plate 32. Guide pillars 33 are fixedly connected to the four corners of the mounting plate 32. The mold closing end face of the fixed mold plate 3 is provided with guide holes 34 for clearance fit of the guide pillars 33. A plurality of ejector pins 35 penetrating the fixed mold plate 3 are provided on the mounting plate 32, and the ejector pins 35 are parallel to the normal direction of the forming surface of the mold cavity 4. The movable plate 31 is positioned above the mounting plate 32. Several mounting holes 36 are arranged in an array on the side of the movable plate 32 facing away from the mounting plate 32. A compression spring 37 is installed in each mounting hole 36. The two ends of the compression spring 37 are fixed to the top of the movable plate 31 and the closed cavity 29, respectively. The guide post 33 of the front mold 1 pusher assembly 30 guides and resets the compression spring 37. Through the uniform preload of the compression spring 37, the synchronous ejection of the ejector pin array 35 is achieved, avoiding deformation of the thin-walled part during ejection. When the fixed mold plate 3 and the movable mold plate 5 are closed, the compression spring 37 is in a compressed state. During mold separation, the ejector pin 35 ejects the product, preventing the product from sticking to the front mold 1.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sensor wiring harness bracket injection mold, comprising a front mold (1), a rear mold (2), and a core-pulling mechanism, wherein the front mold (1) has a fixed template (3) and a cavity (4) formed on the fixed template (3), and the rear mold (2) has a movable template (5) and a core (6) fixed on the movable template (5), wherein when the core (6) and the cavity (4) are closed, a molding cavity matching the shape of a sensor wiring harness bracket (38) is formed, characterized in that: The core-pulling mechanism includes: a first core-pulling assembly (7) and a second core-pulling assembly (8) disposed on both sides of the moving template (5), each core-pulling assembly having a core-pulling element (10) corresponding to the side hole of the wire harness bracket; a linear driver (9) fixed on the moving template (5), the output end of which is rigidly connected to the first core-pulling assembly (7); a linkage plate (11) slidably assembled in the guide groove of the moving template (5), the sliding direction of which is parallel to the core-pulling direction of the core-pulling element (10), one end of the linkage plate (11) being connected to the output end of the linear driver (9); and an active rack segment (1) disposed at the free end of the linkage plate (11). 2) A transmission gear (13) pivotally connected to the moving template (5) simultaneously meshes with the active rack segment (12) and the driven rack segment (14); the driven rack segment (14) is rigidly connected to the second core-pulling assembly (8), and its tooth direction is opposite to that of the active rack segment (12); when the linear actuator (9) drives the first core-pulling assembly (7) to perform the core-pulling action, the active rack segment (12) is moved through the linkage plate (11), which drives the transmission gear (13) to rotate and drives the driven rack segment (14) to move in the opposite direction, thereby realizing the synchronous reverse core-pulling of the second core-pulling assembly (8); The core-pulling element (10) is configured as a core-pulling plate (15). The core-pulling plates (15) of the first core-pulling assembly (7) and the second core-pulling assembly (8) are arranged along the same inclined line in the horizontal plane of the moving template (5). The core-pulling plate (15) has a forming block (16) corresponding to the side hole of the sensor wire harness bracket (38). The contour of the forming block (16) matches the side hole of the sensor wire harness bracket (38). The moving template (5) is provided with a first mounting groove (17) and a second mounting groove (18) extending along the inclined line. The core-pulling plates (15) of the first core-pulling assembly (7) and the second core-pulling assembly (8) are respectively slidably assembled in the corresponding mounting grooves. Each mounting slot is provided with a detachable receiving plate (19), and the receiving plate (19) is provided with guide bosses (20) on both sides. The core-pulling plate (15) is restricted in the sliding path of the receiving plate (19) by the pressure plate (21), and a guide gap is formed between the pressure plate (21) and the core-pulling plate (15). The moving template (5) is provided with an inclined slide groove (23) corresponding to the position of the linear driver (9), and the output end of the linear driver (9) passes through the inclined slide groove (23) and is connected to the linkage plate (11); The first core-pulling assembly (7) has a connecting block (22) at the end of the receiving plate (19). The output end of the linear driver (9) is connected to the outside of the connecting block (22). One end of the linkage plate (11) is fixed to the inside of the connecting block (22). The core-pulling plate (15) of the first core-pulling assembly (7) is connected to the connecting block (22) by fasteners. The linkage plate (11) and the core-pulling plate (15) are staggered in the vertical direction. The receiving plate (19) of the second core-pulling assembly (8) is provided with a positioning hole (24). A U-shaped bearing seat (25) is fixed in the positioning hole (24). A rotating shaft (26) is provided in the U-shaped notch of the bearing seat (25). The two ends of the rotating shaft (26) are rotatably mounted on the bearing seat (25) through bearings. The transmission gear (13) is fixed on the rotating shaft (26). The linkage plate (11) extends into the U-shaped notch of the bearing seat (25), and the driving rack section (12) and the driven rack section (14) are located on the upper and lower sides of the transmission gear (13), respectively.

2. The injection mold for the sensor harness bracket according to claim 1, characterized in that: The front mold (1) also includes a pad (27) stacked with the fixed mold plate (3). The pad (27) and the fixed mold plate (3) are fixedly connected and fit together. A groove (28) is provided on one end face of the two grooves (28), and the two grooves (28) enclose a closed cavity (29) with a rectangular cross-section. A pusher assembly (30) is provided in the closed cavity (29). The pusher assembly (30) includes a movable plate (31) and a mounting plate (32). Guide posts (33) are fixedly connected to the four corners of the mounting plate (32). The mold closing end of the fixed mold plate (3) The surface is provided with guide holes (34) for guide pillars (33) with clearance fit. The mounting plate (32) is provided with a number of ejector pins (35) that penetrate the fixed template (3) and the ejector pins (35) are parallel to the normal direction of the forming surface of the mold cavity (4). The movable plate (31) is located above the mounting plate (32), and a number of mounting holes (36) are arranged in an array on the end face of the side facing away from the mounting plate (32). A compression spring (37) is provided in each mounting hole (36), and the two ends of the compression spring (37) are fixed to the top of the movable plate (31) and the closed cavity (29) respectively.

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