Sensor wire harness support injection mold

Abstract

The invention relates to a sensor wire harness support injection mold, and provides an innovative solution aiming at the poor synchronism of a traditional guide column sliding block core pulling scheme. The mold comprises a front mold body, a rear mold body and a core-pulling mechanism, the core-pulling mechanism adopts double core-pulling assemblies which are arranged in a collinear and inclined mode, a linkage plate and a gear and rack transmission system are driven through a single linear driver, and precise synchronous reverse movement of double-side core pulling is achieved. Specifically, 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 movable mold plate, and the axes of the core-pulling plates coincide with the axis of a mold core side hole; the linkage plate is meshed with the transmission gear through the driving rack section, the driven rack section is driven to reversely drive the second core pulling assembly, mechanical forced synchronization of the core pulling action is ensured, double-side synchronous core pulling is achieved through the mechanical linkage structure, the synchronization rate is increased, and the time deviation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and particularly to an injection mold for a sensor wire harness bracket. Background Art

[0002] In the field of precision injection molds, for a sensor wire harness bracket with lateral hole features, the traditional technology generally adopts a core-pulling scheme combining a guide pillar and a slider. As shown in Figure 9 This is a schematic diagram of a sensor wire harness bracket. The side wall of the sensor wire harness bracket is provided with side holes. This type of scheme controls the linear movement of the slider through the inclination angle of the guide pillar to achieve lateral core-pulling. However, with the improvement of product precision requirements and the application of complex structures, the following significant defects have emerged in this technical route: The power is transmitted between the guide pillar and the slider relying on sliding friction. After long-term operation, the fit clearance is likely to increase due to wear; for double-sided core-pulling, the guide pillar-slider mechanism needs to be set independently, lacking a mechanical linkage forced synchronization mechanism. In actual production, due to machining errors and assembly clearance differences, the core-pulling speed deviation between the two sides can reach 15%-20%, resulting in asynchronous core-pulling actions on both sides. The above defects seriously restrict the mass production of high-precision sensor wire harness brackets. Summary of the Invention

[0003] The purpose of the present invention is to overcome the disadvantages and deficiencies existing in the prior art, and to provide an injection mold for a sensor wire harness bracket.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An injection mold for a sensor wire harness bracket, including a front mold, a rear mold and a core-pulling mechanism. The front mold has a fixed template and a cavity opened 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 wire harness bracket is formed. The core-pulling mechanism includes: a first core-pulling component and a second core-pulling component arranged on both sides of the movable template. Each core-pulling component is respectively provided with a core-pulling element corresponding to the side hole of the wire harness bracket; a linear drive fixed on the movable template, the output end of which is rigidly connected to the first core-pulling component; a linkage plate slidably assembled in the guide groove of the movable template, the sliding direction of which is 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 drive; an active rack segment arranged at the free end of the linkage plate; a transmission gear pivotally connected to the movable template, which simultaneously meshes with the active rack segment and a driven rack segment; the driven rack segment is rigidly connected to the second core-pulling component, and its tooth direction is set opposite to that of the active rack segment; when the linear drive drives the first core-pulling component to perform a core-pulling action, the active rack segment is driven to move through the linkage plate, driving the transmission gear to rotate and driving the driven rack segment to move in the opposite direction, so as to realize the synchronous reverse core-pulling of the second core-pulling component.

[0005] As a preferred technical solution of the present invention, the core-pulling element is configured as a core-pulling plate. 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 technical solution of the present invention, the moving template is provided with a first installation groove and a second installation groove extending along the inclined line. The core-pulling plates of the first core-pulling assembly and the second core-pulling assembly are respectively slidably assembled in the corresponding installation grooves.

[0007] As a preferred technical solution of the present invention, a detachable receiving plate is provided in each installation groove. Guide bosses are provided on both sides of the receiving plate. The core-pulling plate is restricted within the sliding path of the receiving plate by a pressing plate, and a guiding gap is formed between the pressing plate and the core-pulling plate.

[0008] As a preferred technical solution of the present invention, a connecting block is provided at the end of the receiving plate of the first core-pulling assembly. The output end of the linear drive is connected to the outside of the connecting block. One end of the linkage plate is fixedly connected to the inside of the connecting block. The core-pulling plate of the first core-pulling assembly is connected to the connecting block by a fastener, and the linkage plate and the core-pulling plate are arranged in a vertical dislocation.

[0009] As a preferred technical solution of the present invention, an inclined sliding groove corresponding to the position of the linear drive is provided on the moving template. The output end of the linear drive passes through the inclined sliding groove and is connected to the linkage plate.

[0010] As a preferred technical solution of the present invention, a positioning hole is provided on the receiving plate of the second core-pulling assembly. A U-shaped shaft seat is fixed in the positioning hole. A rotating shaft is provided in the U-shaped notch of the shaft seat. Both ends of the rotating shaft are rotatably installed on the shaft seat through bearings. The transmission gear is fixed on the rotating shaft. The linkage plate extends into the U-shaped notch of the shaft seat, and the active rack section and the driven rack section are respectively located on the upper and lower sides of the transmission gear.

[0011] As a preferred technical solution of the present invention, the front mold further includes a backing plate stacked with the fixed template. The backing plate and the fixed template are fixedly connected and a groove is provided on the end face of the side where they are mutually attached. And the two grooves enclose a closed cavity with a rectangular cross-section. A material pushing assembly is provided in the closed cavity. The material pushing assembly includes a movable plate and a mounting plate. Guide posts are fixedly connected to the four corners of the mounting plate. Guide holes with clearance fit with the guide posts are provided on the mold closing end face of the fixed template. 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 cavity forming surface. The movable plate is arranged above the mounting plate. A plurality of mounting holes are arrayed on the end face of the side facing away from the mounting plate. Compression springs are provided in each mounting hole. Both ends of the compression spring are respectively fixed to the movable plate and the top of the closed cavity.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The mechanical linkage design of the linkage plate driven by a single linear drive and the gear rack transmission system forces the reverse synchronous movement of the core pulling components on both sides to eliminate the movement deviation caused by the traditional independent drive. The core pulling plate arranged in a colinear tilt and the mounting groove extending along the tilt line are used to reconstruct the core pulling path in the horizontal plane. Compared with the traditional guide column slider solution, the lateral projection area of ​​the mold is reduced, which is suitable for the forming requirements of deep and long side holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the rear mold in the present invention; Figure 2 It is a structural schematic diagram of the front mold in the present invention; Figure 3 It is a structural schematic diagram of the core pulling mechanism in the present invention; Figure 4 It is a schematic diagram of the bottom structure of the core pulling mechanism in the present invention; Figure 5 It is a partial structural schematic diagram of the second core pulling assembly in the present invention; Figure 6 It is a schematic diagram of the mold end surface structure of the front mold in the present invention; Figure 7 It is a schematic diagram of the structure of AA of the present invention; Figure 8 It is a structural schematic diagram of the core pulling element in the present invention; Figure 9 It is a structural schematic diagram of a sensor harness bracket in the background technology.

[0014] 1. Front mold; 2. Rear mold; 3. Fixed mold plate; 4. Mold cavity; 5. Moving mold plate; 6. Mold core; 7. First core pulling assembly; 8. Second core pulling assembly; 9. Linear drive; 10. Core pulling element; 11. Linkage plate; 12. Active rack segment; 13. Transmission gear; 14. Driven rack segment; 15. Core pulling plate; 16. Forming block; 17. First mounting groove; 18. Second mounting groove; 19. Adapter plate; 20. Guide boss; 21. Press plate; 22. Connecting block; 23. Inclined slide groove; 24. Positioning hole; 25. Shaft seat; 26. Rotating shaft; 27. Pad; 28. Groove; 29. ​​Closed cavity; 30. Pushing assembly; 31. Movable plate; 32. Mounting plate; 33. Guide column; 34. Guide hole; 35. Ejector pin; 36. Mounting hole; 37. Compression spring; 38. Sensor harness bracket. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0016] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0017] As Figures 1-9 shown, an injection mold for a sensor wire harness bracket includes a front mold 1, a rear mold 2 and a core-pulling mechanism. The front mold 1 has a fixed mold plate 3 and a mold cavity 4 opened on the fixed mold plate 3. The rear mold 2 has a movable mold plate 5 and a mold core 6 fixed on the movable mold plate 5. When the mold core 6 and the mold cavity 4 are closed, a molding cavity matching the outer shape of the sensor wire harness bracket 38 is formed. The core-pulling mechanism includes: a first core-pulling assembly 7 and a second core-pulling assembly 8 arranged on both sides of the movable mold plate 5, and each core-pulling assembly is respectively provided with a core-pulling element 10 corresponding to the side hole of the wire harness bracket; a linear driver 9 (such as a cylinder, an electric cylinder, a hydraulic cylinder, etc.) fixed on the movable mold plate 5, and its output end is rigidly connected to the first core-pulling assembly 7; a linkage plate 11 slidably assembled in the guide groove of the movable mold plate 5, and its sliding direction is parallel to the core-pulling direction of the core-pulling element 10. One end of the linkage plate 11 is connected to the output end of the linear driver 9; a driving rack segment 12 provided at the free end of the linkage plate 11; a transmission gear 13 pivotally connected to the movable mold plate 5, and the transmission gear 13 meshes with the driving rack segment 12 and the driven rack segment 14 at the same time; 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 driving rack segment 12; when the linear driver 9 drives the first core-pulling assembly 7 to perform the core-pulling action, the driving rack segment 12 is driven to move through the linkage plate 11, the transmission gear 13 is driven to rotate and the driven rack segment 14 is driven to move in the opposite direction, so as to realize the synchronous reverse core-pulling of the second core-pulling assembly 8. In this embodiment, the ejecting mechanism of the movable mold plate 5 and the other necessary mold plates of the injection mold are all prior arts and are relatively mature on the market, so they are not specifically described in this application. The core of the present invention lies in the bilateral core-pulling mechanism, and the other unmentioned pouring, cooling and water circuit systems are all existing designs.

[0018] Through the mechanical linkage design of driving the linkage plate 11 and the gear-rack transmission system by a single linear driver 9, the reverse synchronous movement of the bilateral core-pulling assemblies is forcibly realized, eliminating the movement deviation caused by traditional independent driving. Under the same driving stroke, the effective core-pulling stroke is increased by 40% (when θ = 45°), breaking through the stroke limit of the traditional core-pulling by the guide post 33.

[0019] 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 holes of the sensor wire harness bracket 38, and the contour of the forming block 16 matches the side holes of the sensor wire harness bracket 38. By using the core-pulling plates 15 arranged in a collinear inclined manner and the installation grooves extending along the inclined line, the core-pulling path is reconstructed in the horizontal plane. Compared with the traditional guide pillar 33 slider solution, the lateral projection area of the mold is reduced, meeting the forming requirements of deep and long side holes.

[0020] The moving template 5 is provided with a first installation groove 17 and a second installation 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 installation grooves.

[0021] A detachable receiving plate 19 is provided in each installation groove. Guide bosses 20 are provided on both sides of the receiving plate 19. The core-pulling plate 15 is restricted within the sliding path of the receiving plate 19 by a pressure plate 21, and a guiding gap is formed between the pressure plate 21 and the core-pulling plate 15.

[0022] An adapter block 22 is provided at the end of the receiving plate 19 of the first core-pulling assembly 7. The output end of the linear actuator 9 is connected to the outside of the adapter block 22. One end of the linkage plate 11 is fixedly connected to the inside of the adapter block 22. The core-pulling plate 15 of the first core-pulling assembly 7 is connected to the adapter block 22 by fasteners, and the linkage plate 11 and the core-pulling plate 15 are arranged in a vertical offset manner.

[0023] The moving template 5 is provided with an inclined sliding groove 23 corresponding to the position of the linear actuator 9. The output end of the linear actuator 9 passes through the inclined sliding groove 23 and is connected to the linkage plate 11.

[0024] A positioning hole 24 is provided on the receiving plate 19 of the second core-pulling assembly 8. A U-shaped shaft seat 25 is fixed in the positioning hole 24. A rotating shaft 26 is provided in the U-shaped notch of the shaft seat 25. Both ends of the rotating shaft 26 are rotatably installed on the shaft 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 shaft seat 25, and the active rack segment 12 and the driven rack segment 14 are respectively located on the upper and lower sides of the transmission gear 13.

[0025] The front mold 1 further includes a backing plate 27 stacked with the fixed mold plate 3. The backing plate 27 and the fixed mold plate 3 are fixedly connected, and a groove 28 is formed on one end face where they are in contact with each other. The two grooves 28 enclose a closed cavity 29 with a rectangular cross-section. A pushing component 30 is arranged in the closed cavity 29. The pushing component 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. Guide holes 34 with clearance fit for the guide posts 33 are arranged on the mold closing end face of the fixed mold plate 3. A number of ejector pins 35 passing through the fixed mold plate 3 are arranged on the mounting plate 32, and the ejector pins 35 are parallel to the normal direction of the forming surface of the cavity 4. The movable plate 31 is arranged above the mounting plate 32. A number of mounting holes 36 are arranged in an array on the end face of the movable plate 31 facing away from the mounting plate 32. Compression springs 37 are arranged in each mounting hole 36. The two ends of the compression spring 37 are respectively fixed to the movable plate 31 and the top of the closed cavity 29. The guide posts 33 of the pushing component 30 of the front mold 1 are guided and the compression springs 37 are reset; through the uniformly distributed pre-tightening force of the compression springs 37, the synchronous ejection of the ejector pin array is realized, avoiding the deformation of the thin-walled parts during ejection. When the fixed mold plate 3 and the movable mold plate 5 are closed, the compression springs 37 are in a compressed state. When the mold is split, the ejector pins 35 eject the product, avoiding the product from sticking to the front mold 1.

[0026] The above shows and describes 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 by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A sensor 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 mold plate (3) and a mold cavity (4) provided on the fixed mold plate (3), and the rear mold (2) has a movable mold plate (5) and a mold core (6) fixed on the movable mold plate (5), and when the mold core (6) and the mold cavity (4) are molded together, a molding cavity matching the shape of the sensor harness bracket (38) is formed, characterized in that: The core pulling mechanism comprises: a first core pulling assembly (7) and a second core pulling assembly (8) arranged on both sides of the movable plate (5), each core pulling assembly is provided with a core pulling element (10) corresponding to the side hole of the harness bracket; a linear drive (9) fixed on the movable plate (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 movable plate (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) is connected to the output end of the linear drive (9); an active rack segment (11) arranged at the free end of the linkage plate (11) 2); a transmission gear (13) pivotally connected to the movable template (5), the transmission gear (13) simultaneously meshing 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 the active rack segment (12); when the linear drive (9) drives the first core pulling assembly (7) to perform the core pulling action, the active rack segment (12) is driven to move through the linkage plate (11), driving the transmission gear (13) to rotate and drive 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).

2. The sensor harness bracket injection mold according to claim 1, characterized in that: The core pulling element (10) is configured as a core pulling plate (15), and 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 movable template (5), and the core pulling plate (15) has a forming block (16) corresponding to the side hole of the sensor harness bracket (38), and the contour of the forming block (16) matches the side hole of the sensor harness bracket (38).

3. The sensor harness bracket injection mold according to claim 2, characterized in that: The movable plate (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.

4. The sensor harness bracket injection mold according to claim 3, characterized in that: A detachable receiving plate (19) is provided in each installation groove, and guide bosses (20) are provided on both sides of the receiving plate (19). The core-pulling plate (15) is restricted within the sliding path of the receiving plate (19) by a pressing plate (21), and a guiding gap is formed between the pressing plate (21) and the core-pulling plate (15).

5. The sensor harness bracket injection mold according to claim 4, characterized in that: A connecting block (22) is provided at the end of the receiving plate (19) of the first core pulling assembly (7); the output end of the linear drive (9) is connected to the outside of the connecting block (22); one end of the linkage plate (11) is fixedly connected 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) via a fastener, and the linkage plate (11) and the core pulling plate (15) are arranged in a staggered manner in the vertical direction.

6. The sensor harness bracket injection mold according to claim 1, characterized in that: The movable plate (5) is provided with an inclined slide groove (23) corresponding to the position of the linear drive (9), and the output end of the linear drive (9) passes through the inclined slide groove (23) and is connected to the linkage plate (11).

7. The sensor harness bracket injection mold according to claim 4, characterized in that: A positioning hole (24) is provided on the receiving plate (19) of the second core pulling assembly (8), a U-shaped shaft seat (25) is fixed in the positioning hole (24), a rotating shaft (26) is provided in the U-shaped notch of the shaft seat (25), both ends of the rotating shaft (26) are rotatably mounted on the shaft 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 shaft seat (25), and the active rack segment (12) and the driven rack segment (14) are respectively located on the upper and lower sides of the transmission gear (13).

8. The sensor harness bracket injection mold according to claim 1, characterized in that: The front mold (1) also includes a backing plate (27) stacked with the fixed mold plate (3), the backing plate (27) and the fixed mold plate (3) are fixedly connected and abutted against each other, one end surface of which is provided with a groove (28), and the two grooves (28) enclose a closed cavity (29) with a rectangular cross section, and a pusher assembly (30) is provided in the closed cavity (29), and the pusher assembly (30) includes a movable plate (31) and a mounting plate (32), and the four corners of the mounting plate (32) are fixedly connected with guide pillars (33), and the mold end of the fixed mold plate (3) is provided with a guide pillar (33). A guide hole (34) with a clearance fit of a guide column (33) is arranged on the surface, a plurality of ejector pins (35) penetrating the fixed template (3) are arranged on the mounting plate (32), and the ejector pins (35) are parallel to the normal direction of the molding surface of the mold cavity (4), and the movable plate (31) is arranged above the mounting plate (32), and a plurality of mounting holes (36) are distributed in an array on the end surface of the movable plate (31) facing away from the mounting plate (32), and a compression spring (37) is arranged in each mounting hole (36), and the two ends of the compression spring (37) are respectively fixed to the movable plate (31) and the top of the closed cavity (29).

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