A sunroof mechanical assembly drive slider injection mold and its injection molding process

Abstract

This application discloses an injection mold for a sunroof mechanical assembly drive slider and its injection molding process, relating to the field of molds. It includes a front mold and a rear mold. The front mold includes a front template and a front mold core, and the rear mold includes a rear template and a rear mold core. When the mold is closed, a cavity is formed between the front and rear mold cores. The cavity includes an injection area and a void area. The rear mold core is provided with a sealing spring and a mounting groove for installing the sealing spring. The mounting groove communicates with the void area of ​​the cavity. The sealing spring is rotatably connected to the groove wall of the mounting groove via a rotating shaft. The front mold core is provided with a scraper to force the sealing spring to press against the iron part located in the cavity. By setting the sealing spring, this application can reduce the seepage of molten plastic in the injection area of ​​the cavity into the void area, thereby helping to reduce flash after injection molding.

Description

Technical Field

[0001] This application relates to the field of molds, and in particular to an injection mold for a sunroof mechanical assembly drive slider and its injection molding process. Background Technology

[0002] In addition to producing individual plastic parts, injection molds can also serve as a technical means of connecting different parts. Injection molds connect different parts to form a combined structure through injection molding.

[0003] The mechanical assembly drive slider of the car sunroof includes a steel wire rope and an iron part that serves as the slider. The connection between the steel wire rope and the iron part is made by injection molding. Thus, during the operation of the sunroof, the motor can rotate and wind up the steel wire rope, which drives the slider, thereby moving the sunroof glass.

[0004] Injection molds are used to produce pre-molded metal parts by connecting the steel wire rope and iron components of the sunroof mechanical assembly drive slider. Because the iron components used to connect the glass in the sunroof mechanical assembly drive slider are not completely covered, a certain amount of empty space needs to be created when the iron components are placed in the mold cavity. During injection molding, molten plastic cannot easily enter this empty space, and the corresponding empty area of ​​the iron components remains exposed after molding. However, in actual production, due to factors such as dimensional errors and positioning errors of the iron components, it is difficult to ensure a complete fit between the mold and the iron component surface after the mold closes. This inevitably allows molten plastic to seep into the empty areas within the mold cavity, causing flash to easily form on the pre-molded metal parts, affecting product quality. Summary of the Invention

[0005] In order to reduce the formation of flash in injection molded products containing pre-wrapped iron parts, this application provides an injection mold for a sunroof mechanical assembly drive slider and its injection molding process.

[0006] The technical solution provided in this application for a sunroof mechanical assembly drive slider injection mold and its injection molding process is as follows:

[0007] A sunroof mechanical assembly drive slider injection mold includes a front mold and a rear mold. The front mold includes a front template and a front mold core, and the rear mold includes a rear template and a rear mold core. When the mold is closed, a cavity is formed between the front mold core and the rear mold core. The cavity includes an injection area and a void area. The rear mold core is provided with a sealing spring block and a mounting groove for installing the sealing spring block. The mounting groove communicates with the void area of ​​the cavity. The sealing spring block is rotatably connected to the groove wall of the mounting groove via a rotating shaft. The front mold core is provided with a scraper for forcing the sealing spring block to press against an iron part located in the cavity.

[0008] By adopting the above technical solution, when the mold is used for injection molding, a cavity is formed between the front mold core and the rear mold core. The iron part is located in the cavity, and the surface of the iron part abuts against the inner wall of the cavity, thus separating the injection area and the empty area in the cavity. At the same time, the shovel presses against the sealing spring, forcing the sealing spring to press against the surface of the iron part. During the injection molding process, when the molten plastic material in the injection area of ​​the cavity seeps from the gap between the inner wall of the cavity and the surface of the iron part into the empty area of ​​the cavity, the sealing spring can hinder the seepage of the molten plastic material because it presses against the surface of the iron part, thereby reducing the formation of flash after the pre-wrapped iron part is injection molded.

[0009] Optionally, the rear mold is provided with a positioning block, the positioning block is a long strip structure, the length direction of the positioning block is perpendicular to the mold opening direction, and the positioning block is provided with a positioning groove for positioning the steel wire rope along its entire length; the positioning block is provided with two limiting posts, the two limiting posts are respectively located on both sides of the positioning groove.

[0010] By adopting the above technical solution, when injection molding products of pre-wrapped iron parts for the drive slider of the sunroof mechanical assembly, the iron parts are placed inside the mold, and the part of the wire rope near the iron parts extends into the cavity of the mold. The main part of the wire rope extends out of the outside of the mold. The wire rope located outside the mold is positioned by the positioning groove. Two limiting posts can keep the wire rope in the positioning groove, so that the part of the wire rope located inside the mold and the part of the wire rope located outside the mold extend and transition in a straight path, reducing the deformation caused by the part of the wire rope located outside the mold pulling the part of the wire rope located inside the mold.

[0011] Optionally, the positioning block is provided with a clamping member, and the positioning block has a mounting hole for installing the clamping member. The two ends of the mounting hole are through-holes. The side of the positioning block away from the positioning groove is provided with a connecting plate for covering the mounting hole. The mounting hole communicates with the positioning groove. The clamping member includes two opposing clamping blocks. The two clamping blocks are arranged side by side along a direction perpendicular to the length direction of the positioning block. The side of the clamping block near the connecting plate is provided with a stepped protrusion. The end of the mounting hole near the connecting plate is provided with a relief groove for avoiding the stepped protrusion. The clamping block extends partially beyond the mounting hole. An arc-shaped groove is provided at the portion of the clamping block located outside the mounting hole. A clamping area for accommodating the wire rope is formed between two arc-shaped grooves. The clamping area is connected to the positioning groove. The clamping block protrudes outwards on the side closest to the opposite clamping block, with the arc-shaped groove located on the protruding portion of the clamping block. The distance between the two clamping blocks first increases and then decreases in the direction away from the connecting plate. A clamping opening is formed between the two clamping blocks for the wire rope to enter the clamping area. An elastic element connects the two clamping blocks, forcing the two clamping blocks against the inner wall of the mounting hole.

[0012] By adopting the above technical solution, the wire rope driving the slider of the sunroof mechanical assembly can enter the clamping area through the clamping jaws of the clamping member. During the process of the wire rope entering the clamping groove, the wire rope forces the clamping jaws of the clamping member to open, allowing the wire rope to enter the clamping area. Simultaneously, the wire rope forces the two clamping blocks to swing, gradually reducing the distance between the two clamping blocks near the connecting plate, thus causing the elastic element to compress and deform. After the wire rope enters the clamping area, the elastic force of the elastic element forces the two clamping blocks to swing back to their original position. The two clamping blocks together clamp the wire rope, keeping its position stable on the outside of the mold and close to the mold. When it is necessary to remove the wire rope from the clamping area, by dragging the wire rope, it presses against the edge of the two arc-shaped grooves near the clamping jaws, forcing the clamping jaws to open and allowing the wire rope to disengage from the clamping area. The process of the wire rope entering and leaving the clamping area is convenient and quick.

[0013] Optionally, the sealing spring is provided with a ball screw, which is threadedly connected to the sealing spring. One end of the ball screw has a steel ball, and the steel ball of the ball screw abuts against the side wall of the mounting groove. The ball screw is used to force the sealing spring away from the iron part and form a gap between the sealing spring and the iron part.

[0014] By adopting the above technical solution, the ball screw forces a gap between the sealing spring and the iron part, making it easier to put the iron part away.

[0015] Optionally, the sealing spring is threadedly connected to a limiting screw, the limiting screw is coaxially arranged with the ball screw, the minor diameter of the limiting screw is greater than or equal to the major diameter of the ball screw, and the thread direction of the limiting screw is opposite to that of the ball screw.

[0016] By adopting the above technical solution, when the ball screw presses against the groove wall of the mounting slot, the ball screw has a spiral tendency to penetrate deeper into the sealant spring block along the axial direction. By setting a limiting screw, the limiting screw prevents the ball screw from penetrating deeper into the sealant spring block. Furthermore, since the thread direction of the limiting screw is opposite to that of the ball screw, when the ball screw rotates spirally towards the limiting screw, the frictional force generated between the ball screw and the limiting screw simultaneously drives the limiting screw to move closer to the ball screw, thus effectively preventing the ball screw from penetrating deeper into the sealant spring block. In addition, the minor diameter of the limiting screw is larger than the major diameter of the ball screw, allowing the ball screw to enter the threaded hole where the limiting screw is located, facilitating adjustment of the axial position of the ball screw.

[0017] Optionally, the sealing spring block is provided with a first threaded hole adapted to the ball screw, and the bottom wall of the first threaded hole is provided with a through hole for an internal hex wrench to pass through, the diameter of the through hole being smaller than the major diameter of the first threaded hole.

[0018] By adopting the above technical solution, a stepped surface is formed between the bottom of the first threaded hole and the inner wall of the through hole. The end of the ball screw away from the steel ball abuts against the bottom of the first threaded hole, keeping the axial position of the ball screw stable. By providing a through hole, an Allen wrench used to install the ball screw can be inserted into the first threaded hole through the through hole, allowing the Allen wrench to move and remove the ball screw.

[0019] Optionally, the sealing spring block has an arc surface on the side near the bottom of the mounting groove, and the center line of curvature of the arc surface coincides with the axis of the rotating shaft. The arc surface is used to support the bottom of the mounting groove.

[0020] By adopting the above technical solution, the sealing spring block abuts against the bottom of the mounting groove through its arc surface, so that the bottom of the mounting groove supports the sealing spring block. This causes part of the pressure exerted by the shovel on the sealing spring block to be applied to the bottom of the mounting groove, thereby reducing the pressure on the rotating shaft, thus reducing wear during the rotation of the shaft, and consequently reducing the increase in the rotational clearance of the shaft.

[0021] Optionally, the bottom of the mounting groove is provided with a support pad, which is located between the sealing spring block and the bottom wall of the mounting groove. The support pad abuts against the arc surface of the sealing spring block and the bottom wall of the mounting groove, respectively. The dimension of the support pad perpendicular to the axis of the rotating shaft is smaller than the dimension of the bottom of the mounting groove perpendicular to the axis of the rotating shaft.

[0022] By adopting the above technical solution, the arc surface of the sealing spring is supported on the bottom of the mounting groove by the support pad. When the sealing spring rotates and presses against the iron part under the pressure of the shovel, the arc surface of the sealing spring forms rolling friction with the support pad. Under the action of rolling friction, the support pad moves along the bottom wall of the mounting groove. The sliding friction between the support pad and the bottom of the mounting groove replaces the friction between the arc surface and the bottom of the mounting groove. The contact area between the support pad and the bottom of the mounting groove is large and the pressure is small, which helps to reduce the friction when the sealing spring rotates.

[0023] Optionally, the support pad includes a metal gasket and a polytetrafluoroethylene (PTFE) gasket stacked together. The metal gasket abuts against the sealing spring block, and the PTFE gasket abuts against the bottom wall of the mounting groove. The metal gasket has a protrusion on the side near the PTFE gasket, and the PTFE gasket has a positioning hole for avoiding the protrusion. The height of the protrusion is less than or equal to the thickness of the PTFE gasket.

[0024] By adopting the above technical solution, the metal gasket and PTFE gasket of the support pad jointly support the sealing spring block. The PTFE gasket contacts the bottom of the mounting groove. When the support pad rotates under the action of the sealing spring block, the PTFE gasket slides relative to the bottom of the mounting groove. The PTFE material has self-lubricating properties, which helps reduce the resistance to the rotation of the sealing spring block. The protrusion of the metal gasket mates with the positioning hole of the PTFE gasket, positioning the metal gasket and the PTFE gasket relative to each other. When the PTFE gasket is deformed under pressure until its thickness is equal to the outward protrusion height of the protrusion, the protrusion provides auxiliary support to the PTFE, reducing the possibility of damage from excessive pressure.

[0025] The injection molding process for any of the above-mentioned sunroof mechanical assembly drive slider injection molds includes the following steps:

[0026] S1: Open the mold to separate the front mold from the rear mold;

[0027] S2: Position the steel wire rope and iron parts of the sunroof mechanical assembly drive slider in the rear mold core;

[0028] S3: Start the injection molding process after closing the mold;

[0029] S4: After injection molding is completed, reopen the mold and remove the sunroof mechanical assembly drive slider.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. The iron part is located inside the cavity, and its surface abuts against the inner wall of the cavity, separating the injection area and the empty area within the cavity. The forklift forces the sealing spring block to press firmly against the surface of the iron part. When the molten plastic material in the injection area of ​​the cavity seeps from the gap between the inner wall of the cavity and the surface of the iron part into the empty area of ​​the cavity, the sealing spring block can hinder the seepage of the molten plastic material, thereby reducing the formation of flash after the pre-wrapped iron part is injection molded.

[0032] 2. The ball screw forces a gap between the sealing spring and the metal part, making it easier to put the metal part away.

[0033] 3. By setting a limiting screw, the limiting screw prevents the ball screw from penetrating deeper into the sealing spring. Since the thread direction of the limiting screw is opposite to that of the ball screw, the friction generated between the ball screw and the limiting screw simultaneously drives the limiting screw to move closer to the ball screw, thereby effectively preventing the ball screw from penetrating deeper into the sealing spring. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the mold structure of Example 1.

[0035] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0036] Figure 3 This is a structural schematic diagram of the mold from another perspective of Example 1.

[0037] Figure 4 This is a schematic diagram of the structure of the rear mold core in Example 1.

[0038] Figure 5 It is the rear mold core edge of Example 1 Figure 4 Cross-sectional view along the BB direction.

[0039] Figure 6 This is an exploded view of Embodiment 1, illustrating the connection method between the positioning block and the clamping block.

[0040] Figure 7 This is a cross-sectional view of Embodiment 2 used to illustrate the connection relationship between the sealing module and the mounting slot.

[0041] Figure 8 yes Figure 7 A magnified view of the central area.

[0042] Figure 9 This is a cross-sectional view of Example 3 used to illustrate the connection relationship between the sealing module and the mounting slot.

[0043] Figure 10 This is a structural diagram of a product with pre-coated iron parts injection molded.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Front mold; 11. Front template; 12. Front mold core; 2. Rear mold; 21. Rear template; 22. Rear mold core; 24. Mounting slot; 3. Sealing spring; 31. Rotating shaft; 32. Ball screw; 33. First threaded hole; 34. Arc surface; 35. Limit screw; 36. Through hole; 37. Buffer strip; 38. Receiving groove; 4. Scraper; 41. Angled guide surface; 5. Positioning pin; 6. Positioning block; 61. Positioning groove; 62. Limiting pin; 63. Mounting hole; 64. Connecting plate; 65. Clearance groove; 7. Clamping component; 71. Clamping block; 72. Stepped protrusion; 73. Arc groove; 74. Clamping area; 75. Elastic component; 76. Clamping opening; 8. Support pad; 81. Metal gasket; 811. Protrusion; 82. PTFE gasket; 821. Positioning hole; 9. Cavity; 91. Injection area; 92. Empty area; 10. Iron part; 20. Steel wire rope; 30. Plastic connection part. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0047] Example 1

[0048] This application discloses an injection mold for a sunroof mechanical assembly drive slider. (Refer to...) Figure 1 and Figure 2 The sunroof mechanical assembly drives the slider injection mold, which includes a front mold 1 and a rear mold 2. The front mold 1 includes a front template 11 and a front mold core 12, and the rear mold 2 includes a rear template 21 and a rear mold core 22. When the mold is closed, a cavity 9 is formed between the front mold core 12 and the rear mold core 22. The cavity 9 includes an injection area 91 and an empty area 92.

[0049] When the mold pre-wraps the iron part 10 and the steel wire rope 20 of the sunroof mechanical assembly drive slider, the iron part 10 is placed in the cavity 9 of the mold, and the end of the steel wire rope 20 near the iron part 10 extends into the injection area 91 of the cavity 9. The surface of the iron part 10 abuts against a part of the inner wall of the cavity 9, separating the injection area 91 from the empty area 92. When the mold works, the plastic filling the injection area 91 of the cavity 9 connects the iron part 10 and the steel wire rope 20. The solidified plastic forms the plastic connection part 30.

[0050] Reference Figure 1 and Figure 3 The rear mold core 22 is provided with a positioning post 5 for positioning the iron part 10, a sealing spring block 3, and a mounting groove 24 for mounting the sealing spring block 3. The mounting groove 24 is connected to the empty area 92 of the cavity 9. The sealing spring block 3 is provided with a spring return component. The sealing spring block 3 is rotatably connected to the groove wall of the mounting groove 24 through a rotating shaft 31. The front mold core 12 is provided with a scraper 4. The scraper 4 is provided with an inclined guide surface 41 on the side near the rear mold core 22. When the mold is closed, the scraper 4 abuts against the sealing spring block 3 through the inclined guide surface 41, so as to force the sealing spring block 3 to rotate slightly around the rotating shaft 31 and then press against the iron part 10 located in the lower mold core. When the mold is opened, the scraper 4 separates from the sealing spring block 3. The spring return component forces the sealing spring block 3 to rotate away from the iron part 10 and form a gap between it and the iron part 10 to facilitate the removal and placement of the iron part 10.

[0051] Reference Figure 4 and Figure 5 In this embodiment, the spring-loaded component is specifically a ball screw 32. In another embodiment, the spring-loaded component can also be a spring, a rubber component, or other elastic parts. The sealing spring block 3 is provided with a first threaded hole 33 that is adapted to the ball screw 32. The ball screw 32 is threadedly connected to the first threaded hole 33. One end of the ball screw 32 has a steel ball. The steel ball part of the ball screw 32 is located outside the first threaded hole 33. The steel ball of the ball screw 32 abuts against the side wall of the mounting groove 24.

[0052] Reference Figure 1The rear mold 2 is provided with a positioning block 6, which is a long rectangular block structure. The length direction of the positioning block 6 is perpendicular to the mold opening direction. The positioning block 6 is provided with a positioning groove 61 for positioning the wire rope 20 along its entire length. The positioning block 6 is provided with two limiting posts 62, which are located on both sides of the positioning groove 61. The two limiting posts 62 can keep the wire rope 20 in the positioning groove 61. Under the positioning action of the positioning groove 61, the part of the wire rope 20 located on the outside of the mold and the part located on the inside of the mold extend straight and transition, which helps to reduce the deformation of the part of the wire rope 20 located on the outside of the mold caused by the part of the wire rope 20 located on the inside of the mold.

[0053] Reference Figure 1 and Figure 6 The positioning block 6 is provided with a clamping member 7. The positioning block 6 is provided with a mounting hole 63 for installing the clamping member 7. The mounting hole 63 is a square hole, and both ends of the mounting hole 63 are through. The mounting hole 63 is connected to the positioning groove 61. A connecting plate 64 is detachably connected to the side of the positioning block 6 away from the positioning groove 61 by bolts. A groove-shaped space is formed between the surface of the connecting plate 64 near the positioning block 6 and the inner wall of the mounting hole 63.

[0054] The clamping member 7 includes two opposing clamping blocks 71, which are arranged side by side along a direction perpendicular to the length of the positioning block 6. Each clamping block 71 has a stepped protrusion 72 on the side near the connecting plate 64. The mounting hole 63 has a clearance groove 65 at the end near the connecting plate 64 to avoid the stepped protrusion 72. A portion of the clamping block 71 extends outside the mounting hole 63, and an arc-shaped groove 73 is provided at the portion of the clamping block 71 located outside the mounting hole 63. A clamping area 74 for accommodating the wire rope 20 is formed between the two arc-shaped grooves 73. The curvature center lines of the two arc-shaped grooves 73 coincide. 74 is connected to the positioning groove 61. The clamping block 71 is protruding outward on one side near the opposite clamping block 71. The arc-shaped groove 73 is located on the protruding part of the clamping block 71. The distance between the two clamping blocks 71 first increases and then decreases in the direction away from the connecting plate 64. A clamping opening 76 is formed between the two clamping blocks 71 to allow the wire rope 20 to enter the clamping area 74. The minimum width of the clamping opening 76 is smaller than the inner diameter of the clamping area 74. An elastic element 75 is connected between the two clamping blocks 71. The elastic element 75 is specifically a compression spring. The elastic element 75 is used to force the two clamping blocks 71 to press against the inner wall of the mounting hole 63.

[0055] The wire rope 20 driving the slider of the sunroof mechanical assembly can enter the clamping area 74 through the clamping opening 76 of the clamping member 7, so that the clamping area 74 clamps the wire rope 20, keeping the position of the wire rope 20 stable on the outside of the mold and close to the mold. When it is necessary to remove the wire rope 20 from the clamping area 74, by dragging the wire rope 20, the wire rope 20 presses against the edge of the two arc-shaped grooves 73 near the clamping opening 76, thereby forcing the clamping opening 76 to open, allowing the wire rope 20 to be released from the clamping area 74.

[0056] The implementation principle of the injection mold for the drive slider of the sunroof mechanical assembly in this application embodiment is as follows: When the mold is used to injection mold the iron part 10 of the drive slider of the sunroof mechanical assembly, the iron part 10 is located in the cavity 9, the steel wire rope 20 extends into the inner side of the mold, and the surface of the iron part 10 abuts against the inner wall of the cavity 9, so that the injection area 91 and the empty area 92 in the cavity 9 are separated from each other. The sealing spring block 3 presses against the surface of the iron part 10 to prevent the molten plastic material from seeping from the injection area 91 of the cavity 9 into the empty area 92. After the injection molding is completed, the molten plastic solidifies, so that the steel wire rope 20 and the iron part 10 are connected. Under the action of the sealing spring block 3, the plastic connecting the iron part 10 and the steel wire rope 20 is not prone to forming flash defects.

[0057] This embodiment also discloses an injection molding process for a sunroof mechanical assembly drive slider injection mold, including the following steps:

[0058] S1: Open the mold to separate the front mold from the rear mold;

[0059] S2: Position the steel wire rope and iron parts of the sunroof mechanical assembly drive slider in the rear mold core;

[0060] S3: Start the injection molding process after closing the mold;

[0061] S4: After injection molding is completed, reopen the mold and remove the sunroof mechanical assembly drive slider.

[0062] Example 2

[0063] Reference Figure 7 and Figure 8The difference between this embodiment and Embodiment 1 is that: the sealing spring block 3 of the sunroof mechanical assembly drive slider injection mold has an arc surface 34 on the side near the bottom of the mounting groove 24, and the center line of curvature of the arc surface 34 coincides with the axis of the rotating shaft 31; a support pad 8 is provided at the bottom of the mounting groove 24, and the support pad 8 is located between the sealing spring block 3 and the bottom wall of the mounting groove 24. The support pad 8 abuts against the arc surface 34 of the sealing spring block 3 and the bottom wall of the mounting groove 24, so that the support pad 8 acts as an auxiliary support seat for the sealing spring block 3. The dimension of the support pad 8 perpendicular to the axial direction of the rotating shaft 31 is smaller than the dimension of the bottom of the mounting groove 24 perpendicular to the axial direction of the rotating shaft 31. When the forklift 4 forces the sealing spring block 3 to rotate and press against the iron part 10, the arc surface 34 of the sealing spring block 3 rotates around the rotating shaft 31, and the arc surface 34 drives the support pad 8 to slide along the bottom of the mounting groove 24 through friction.

[0064] Reference Figure 8 The support pad 8 includes a metal pad 81 and a polytetrafluoroethylene (PTFE) pad 82 stacked together. The metal pad 81 abuts against the sealing spring block 3, and the PTFE pad 82 abuts against the bottom wall of the mounting groove 24. The frictional damping of the PTFE pad 82 when in contact with the bottom of the mounting groove 24 is small, which helps to reduce the resistance when the sealing spring block 3 rotates. The metal pad 81 has a protrusion 811 on the side near the PTFE pad 82, and the PTFE pad 82 has a positioning hole 821 for avoiding the protrusion 811. The height of the protrusion 811 is less than or equal to the thickness of the PTFE pad 82. The avoidance protrusion 811 cooperates with the positioning hole 821 to keep the relative position between the PTFE pad 82 and the metal pad 81 stable.

[0065] Reference Figure 7 The sealing spring block 3 is threadedly connected to a limiting screw 35. The limiting screw 35 is coaxially arranged with the ball screw 32. The minor diameter of the limiting screw 35 is greater than or equal to the major diameter of the ball screw 32, and the thread direction of the limiting screw 35 is opposite to that of the ball screw 32. By setting the limiting screw 35, the limiting screw 35 prevents the ball screw 32 from penetrating deep into the sealing spring block 3. Furthermore, because the thread direction of the limiting screw 35 is opposite to that of the ball screw 32, when the ball screw 32 rotates helically towards the limiting screw 35, the friction generated between the ball screw 32 and the limiting screw 35 simultaneously drives the limiting screw 35 to move towards the ball screw 32, thereby effectively preventing the ball screw from penetrating deep into the sealing spring block 3.

[0066] Example 3

[0067] Reference Figure 9The difference between this embodiment and Embodiment 1 is that the sealing spring block 3 in the injection mold of the sunroof mechanical assembly drive slider in this embodiment does not have a limiting screw 35. The first threaded hole 33 in this embodiment is a blind hole, and the bottom wall of the first threaded hole 33 has a through hole 36 for inserting an Allen wrench. The diameter of the through hole 36 is smaller than the minor diameter of the first threaded hole 33. When installing the ball screw, the Allen wrench is passed through the through hole 36 and the first threaded hole 33 in sequence, and then the ball screw is screwed into the first threaded hole 33 until the ball screw abuts the bottom of the first threaded hole 33.

[0068] In this embodiment, the sealing spring block 3 is provided with a buffer strip 37. The sealing spring block 3 abuts against the iron part 10 located in the cavity 9 through the buffer strip 37. The buffer strip 37 is formed by winding a metal film. The length direction of the buffer strip 37 is parallel to the extension direction of the mold joint between the front mold 1 and the rear mold 2. The sealing spring block 3 is provided with a receiving groove 38 for accommodating the buffer strip 37. The width of the receiving groove 38 gradually decreases along the direction away from the groove opening. Part of the buffer strip 37 is exposed outside the receiving groove 38.

[0069] The sealing spring 3 abuts against the iron part 10 via the buffer strip 37. The buffer strip 37 is formed by winding a metal film, which gives the buffer strip 37 greater flexibility and allows it to fit as closely as possible to the surface of the iron part 10. This helps to increase the sealing performance of the contact area between the sealing spring 3 and the iron part 10, thereby minimizing the leakage of molten plastic. The buffer strip 37 is formed by winding a metal film, which makes it more heat-resistant. When the buffer strip 37 is heated in the mold, it is less likely to deform or be damaged.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sunroof mechanical assembly drive slider injection mold, comprising a front mold (1) and a rear mold (2), wherein the front mold (1) comprises a front template (11) and a front mold core (12), and the rear mold (2) comprises a rear template (21) and a rear mold core (22), wherein when the mold is closed, a cavity (9) is formed between the front mold core (12) and the rear mold core (22), the cavity (9) comprising an injection area (91) and an empty area (92), characterized in that: The rear mold core (22) is provided with a sealing spring block (3), and the rear mold core (22) is provided with a mounting groove (24) for installing the sealing spring block (3). The mounting groove (24) is connected to the empty area (92) of the cavity (9). The sealing spring block (3) is rotatably connected to the groove wall of the mounting groove (24) through a rotating shaft (31). The front mold core (12) is provided with a scraper (4). The scraper (4) is used to force the sealing spring block (3) to press against the iron part (10) located in the cavity (9). The rear mold (2) is provided with a positioning block (6), which is a long strip structure. The length direction of the positioning block (6) is perpendicular to the mold opening direction. The positioning block (6) is provided with a positioning groove (61) for positioning the steel wire rope (20) along its entire length. The positioning block (6) is provided with two limiting posts (62), which are located on both sides of the positioning groove (61).

2. The injection mold for the drive slider of a sunroof mechanical assembly according to claim 1, characterized in that: The positioning block (6) is provided with a clamping member (7). The positioning block (6) is provided with a mounting hole (63) for mounting the clamping member (7). The two ends of the mounting hole (63) are through. The side of the positioning block (6) away from the positioning groove (61) is provided with a connecting plate (64) for shielding the mounting hole (63). The mounting hole (63) is connected to the positioning groove (61). The clamping member (7) includes two opposing clamping blocks (71). The two clamping blocks (71) are arranged side by side along a direction perpendicular to the length direction of the positioning block (6). The side of the clamping block (71) near the connecting plate (64) is provided with a stepped protrusion (72). The end of the mounting hole (63) near the connecting plate (64) is provided with a relief groove (65) for avoiding the stepped protrusion (72). The clamping block (71) extends out of the mounting hole (64). Outside the hole (63), the clamping block (71) is provided with an arc-shaped groove (73) at the part outside the mounting hole (63). A clamping area (74) for accommodating the wire rope (20) is formed between the two arc-shaped grooves (73). The clamping area (74) is connected to the positioning groove (61). The clamping block (71) is convex on the side close to the opposite clamping block (71). The arc-shaped groove (73) is located on the convex part of the clamping block (71). The distance between the two clamping blocks (71) first increases and then decreases in the direction away from the connecting plate (64). A clamping opening (76) for the wire rope (20) to enter the clamping area (74) is formed between the two clamping blocks (71). An elastic element (75) is connected between the two clamping blocks (71). The elastic element (75) is used to force the two clamping blocks (71) to press against the inner wall of the mounting hole (63).

3. The injection mold for the drive slider of a sunroof mechanical assembly according to claim 1, characterized in that: The sealing spring block (3) is provided with a ball screw (32), which is threadedly connected to the sealing spring block (3). One end of the ball screw (32) has a steel ball, and the steel ball of the ball screw (32) abuts against the side wall of the mounting groove (24). The ball screw (32) is used to force the sealing spring block (3) away from the iron part (10) and form a gap between it and the iron part (10).

4. The injection mold for the drive slider of a sunroof mechanical assembly according to claim 3, characterized in that: The sealing spring block (3) is threadedly connected to a limiting screw (35). The limiting screw (35) is coaxially arranged with the ball screw (32). The minor diameter of the limiting screw (35) is greater than or equal to the major diameter of the ball screw (32). The thread direction of the limiting screw (35) is opposite to that of the ball screw (32).

5. The injection mold for the drive slider of a sunroof mechanical assembly according to claim 3, characterized in that: The sealing spring block (3) is provided with a first threaded hole (33) that is adapted to the ball screw (32). The bottom wall of the first threaded hole (33) is provided with a through hole (36) for inserting an internal hex wrench. The diameter of the through hole (36) is smaller than the major diameter of the first threaded hole (33).

6. The injection mold for the drive slider of a sunroof mechanical assembly according to claim 3, characterized in that: The sealing block (3) has an arc surface (34) on one side near the bottom of the mounting groove (24). The curvature center line of the arc surface (34) coincides with the axis of the rotating shaft (31). The arc surface (34) is used to support the bottom of the mounting groove (24).

7. The injection mold for a sunroof mechanical assembly drive slider according to claim 6, characterized in that: The bottom of the mounting groove (24) is provided with a support pad (8). The support pad (8) is located between the sealing spring block (3) and the bottom wall of the mounting groove (24). The support pad (8) abuts against the arc surface (34) of the sealing spring block (3) and the bottom wall of the mounting groove (24). The dimension of the support pad (8) perpendicular to the axis of the rotating shaft (31) is smaller than the dimension of the bottom of the mounting groove (24) perpendicular to the axis of the rotating shaft (31).

8. The injection mold for the drive slider of a sunroof mechanical assembly according to claim 7, characterized in that: The support pad (8) includes a metal pad (81) and a polytetrafluoroethylene (PTFE) pad (82) stacked together. The metal pad (81) abuts against the sealing elastic block (3), and the PTFE pad (82) abuts against the bottom wall of the mounting groove (24). The metal pad (81) has a protrusion (811) on the side near the PTFE pad (82), and the PTFE pad (82) has a positioning hole (821) for avoiding the protrusion (811). The height of the protrusion (811) is less than or equal to the thickness of the PTFE pad (82).

9. The injection molding process of the injection mold for the drive slider of a sunroof mechanical assembly as described in any one of claims 1-8, characterized in that: Includes the following steps: S1: Open the mold to separate the front mold from the rear mold; S2: Position the steel wire rope and iron parts of the sunroof mechanical assembly drive slider in the rear mold core; S3: Start the injection molding process after closing the mold; S4: After injection molding is completed, reopen the mold and remove the sunroof mechanical assembly drive slider.

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