Automobile rearview mirror shell mold

Abstract

The embodiment of the invention discloses an automobile rearview mirror shell mold which comprises a fixed mold assembly and a movable mold assembly, and the movable mold assembly comprises a movable mold core, a fixed mold core and a movable mold core, the first sliding block is mounted on the movable mold core in a sliding manner; the second sliding block and the third sliding block are installed on the movable mold core in a sliding mode, the third sliding block is installed on the second sliding block in an inclined mode, the second sliding block is used for forming a hinged outline, the third sliding block is used for forming a buckle and the inner side of the arc-shaped part, and the third sliding block is matched with a fixed mold core on the fixed mold assembly in an inserting and penetrating mode to form the buckle. The combination of the first sliding block and the second sliding block is used for forming a through hole, during mold opening, the first sliding block performs lateral core pulling in advance, then the second sliding block is separated from the arc-shaped part, and then the third sliding block drives the second sliding block to perform synchronous lateral core pulling. According to the automobile rearview mirror shell mold, forming and core pulling of a complex structure of a rearview mirror shell are accurately completed through linkage cooperation of multiple stages of sliding blocks, and the demolding efficiency and reliability in the injection molding process are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and more specifically, to an automotive rearview mirror housing mold. Background Art

[0002] In the design of modern automotive rearview mirrors, the structure of the rearview mirror housing has become increasingly complex to meet the requirements of aesthetics, aerodynamic performance, and functional integration. As shown in Figure 1-2 the rearview mirror housing shown, it has a contour structure recessed on the outer surface of the plastic part for hinging with the body connection ear, thereby supporting the folding function of the rearview mirror. One end of the rearview mirror near the connection ear is provided with a through hole. In addition, the housing is provided with side holes and snap fasteners for positioning and assembling between components. The arc portion warps upward from one side of the hinged contour towards the mirror surface, which not only enhances the overall rigidity but also has a rainwater diversion function. Although this structural design improves the service performance and user experience, it also poses great challenges to the design and manufacturing of injection molds. For example, the presence of the arc portion and the reverse buckle is likely to form a lateral or reverse demolding structure, increasing the complexity of the core-pulling mechanism and the slider mechanism. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art to a certain extent. For this purpose, an embodiment of the present invention provides an automotive rearview mirror housing mold, which precisely completes the molding and core-pulling of the complex structure of the rearview mirror housing through the linkage cooperation of multiple sliders, effectively improving the demolding efficiency and reliability during the injection molding process.

[0004] The technical solution adopted by the present invention is as follows: An automotive rearview mirror housing mold is provided, including a fixed mold assembly and a moving mold assembly. The moving mold assembly includes: A moving mold core; A first slider slidably mounted on the moving mold core; A second slider and a third slider slidably mounted on the moving mold core. The third slider is obliquely mounted on the second slider. The second slider is used for molding the hinged contour, and the third slider is used for molding the inner side of the snap fastener and the arc portion. The third slider is inserted and penetrated with the fixed mold core on the fixed mold assembly to form the snap fastener. The combination of the first slider and the second slider is used for molding the through hole. When the mold is opened, the first slider performs pre-lateral core-pulling first, then the second slider disengages from the arc portion, and then the third slider drives the second slider to perform synchronous lateral core-pulling.

[0005] After adopting the above structure, the process challenges brought by the complex structure of the rearview mirror housing, especially the existence of undercuts and multi-directional demolding requirements, can be effectively overcome, and the reliability and demolding efficiency of the mold during the injection molding process can be significantly improved. The mold structure introduces a multi-level slider mechanism, especially the linkage between the second slider and the third slider, to accurately complete the molding and core pulling actions of key areas such as the buckle, arc portion and hinged contour. Specifically, the first slider first completes the lateral core pulling operation at the beginning of mold opening, releases the necessary space conditions, and creates a path for the movement of the second slider; then, the second slider gradually drives the third slider installed on it to realize downward demolding during the core pulling process, so that the third slider is separated from the arc portion first, avoiding mold jamming due to structural interference. After the second slider slides to the predetermined position, the third slider forms a synchronous linkage with it to realize the complete core pulling of the inner side of the buckle, thereby completing the lateral demolding of the arc portion and the buckle part at the same time. This linkage design not only realizes the step-by-step core pulling control of the complex structure, but also effectively avoids the interference risk caused by the structural undercut of the mold through the oblique movement path of the third slider. In addition, the insertion and cooperation between the third slider and the fixed mold core further ensures the precise molding of the buckle and improves the dimensional stability and appearance quality of the overall product.

[0006] According to one embodiment of the present invention, the first slider is provided with a core rod, and the second slider is provided with a socket, and the core rod and the socket are inserted and matched; the core rod and the socket are used together to form a through hole on the rearview mirror housing plastic part when the cavity is closed, thereby ensuring the stability of the through hole size and the integrity of the molding. However, since the core rod forms a physical interference with the lateral movement path of the second slider after being inserted into the socket, a specific core pulling sequence must be followed in sequence during the mold opening process. In the specific operation, the first slider must first be pulled out to the side to disengage the core rod from the socket and release the restriction on the second slider; thereafter, the second slider can complete its lateral core pulling action without interference. Through the above-mentioned sequential control, the smoothness of the mold core pulling process and the coordinated work between the mold structures are effectively guaranteed, thereby improving the operability of injection molding and the safety of mold use.

[0007] According to one embodiment of the present invention, a limit block is provided on the movable mold core, and a limit groove is vertically provided on the third slider at a position corresponding to the limit block. In the mold closing state, one end of the limit block is embedded and engaged in the limit groove, thereby limiting the initial position of the third slider; and in the mold opening process, as the mold is separated, the limit block gradually disengages from the limit groove, so that the third slider is released to realize subsequent actions. There is a vertical sliding fit relationship between the limit groove and the limit block, which is used to guide the third slider to produce controlled vertical movement during the core pulling process. In addition, there is an oblique sliding fit between the third slider and the second slider, that is, the two together constitute a group of oblique wedge structures. When the second slider moves along its lateral core pulling direction during the mold opening process, due to the existence of the oblique wedge structure, its lateral displacement will be converted into a vertical driving force on the third slider, thereby prompting the third slider to slide downward, and then disengage from the undercut structure located on the inner side of the arc portion of the plastic part. Through this structural design, the vertical demoulding action of the complex undercut part is cleverly linked with the lateral core pulling action of the second slider, which simplifies the mold structure and improves the demoulding efficiency.

[0008] According to one embodiment of the present invention, one of the second slider and the third slider is provided with a dovetail groove obliquely, and the other is provided with a dovetail block that slides with the dovetail groove; the dovetail structure has good self-positioning and anti-deviating capabilities, and can effectively avoid structural dislocation or jamming caused by the lateral force generated during the opening and closing of the mold while ensuring the sliding stability of the oblique wedge structure. Through the setting of this structure, the second slider can stably drive the third slider to achieve controlled movement along the set oblique trajectory during the lateral core pulling process, ensuring that the third slider can smoothly detach from the undercut structure on the inner side of the arc portion in the vertical direction.

[0009] According to one embodiment of the present invention, a first step is provided on the side of the limit groove close to the cavity, and a second step is provided on the side away from the cavity, and the second step is higher than the first step; the purpose of this structural design is that during the mold opening process, after the third slider completes the vertical demolding action of the arc-shaped undercut structure, the limit block gradually withdraws from the limit groove as the mold separation process progresses, and forms a misaligned state with the first step.

[0010] Since the limit block has completely left the limit groove, when the second slider continues to drive the third slider to move outward, that is, when the core is pulled synchronously in the core pulling direction, the third slider moves laterally relative to the limit block. At this time, the misalignment design between the limit block and the first step ensures that the limit block will not interfere with the third slider, effectively avoiding problems such as jamming, collision or damage during demoulding.

[0011] On the other hand, since the second step is higher than the first step, it plays a dual role of guiding and limiting during the mold closing (clamping) process. Specifically, when the mold is clamped, the side surface of the second step first contacts the limit block, providing vertical positioning guidance for the limit block and enabling it to be smoothly inserted into the limit groove, thereby accurately locking the initial position of the third slider. This structure not only improves the limit accuracy and the consistency of mold closing, but also integrates the functions of demolding anti-interference and mold closing guidance through a reasonable design of the step height difference.

[0012] According to an embodiment of the present invention, one of the second slider and the third slider is provided with a long groove, and the other is provided with a protrusion. The protrusion is inserted into the long groove and is slidably and limit-fitted therewith; during the actual mold opening process, as the second slider performs a side core-pulling action, the protrusion in the long groove starts to slide relatively. When it slides to the end of the long groove, the protrusion part will be restricted by the stroke, thereby restricting the relative displacement range between the second slider and the third slider and preventing risks such as structural interference or dislocation caused by excessive sliding. This limit structure not only improves the controllability and accuracy of the mold movement, but also enhances the stability of the overall assembly.

[0013] According to an embodiment of the present invention, one of the second slider and the third slider is provided with a positioning groove, and the other is provided with a positioning block. When the second slider moves away from the cavity relative to the third slider to a predetermined distance, the positioning block snaps into the positioning groove, enabling the third slider to move synchronously with the second slider. During the mold opening process, when the second slider moves away from the cavity relative to the third slider to a set predetermined position, the positioning block accurately snaps into the positioning groove, forming a firm fitting relationship. This enables the third slider to be stably driven by the second slider to complete the subsequent synchronous side core-pulling action after disengaging from the undercut structure. Through the engagement of the positioning block and the positioning groove, not only are unstable factors such as jitter, deviation, or delayed response of the third slider during the linkage process prevented, but also the accuracy and coordination efficiency of the overall core-pulling mechanism are improved.

[0014] According to an embodiment of the present invention, it further includes an inclined lifter, and the inclined lifter is in contact and cooperation with the second slider.

[0015] According to an embodiment of the present invention, the second slider is provided with a first inclined surface with an inverted multi-step shape, and the lifter is provided with a second inclined surface with a multi-step shape. The first inclined surface and the second inclined surface are in contact and cooperate with each other. Due to the design of the second inclined surface and the third inclined surface, the mold opening sequence between the lifter and the second slider is effectively restricted. Specifically, during the mold opening process, the second slider first needs to complete its core-pulling action to create enough space for the downward movement of the third slider and the upward movement of the lifter. After the second slider and the third slider complete the core-pulling, the lifter can smoothly eject the plastic part to complete the complete demolding of the mold. Through this sequential control design, interference or jamming problems caused by insufficient space during mold opening and closing are effectively avoided.

[0016] According to an embodiment of the present invention, a spring is provided between the second slider and the third slider, and the spring has an elastic tendency to move the second slider away from the third slider.

[0017] According to an embodiment of the present invention, the mold can use either recycled waste plastics or conventional plastics. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a perspective view of the plastic part in the embodiment of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the plastic part in the embodiment of the present invention.

[0021] Figure 3 It is a perspective view of the moving mold assembly in the embodiment of the present invention.

[0022] Figure 4 It is a structural schematic diagram of a part of the moving mold assembly in the embodiment of the present invention.

[0023] Figure 5 It is a structural schematic diagram of the first step when a part of the moving mold assembly is opened in the embodiment of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the first step when the moving mold core and the second slider are opened in the embodiment of the present invention.

[0025] Figure 7 It is a structural schematic diagram of the second step when the second slider and the third slider are opened in the embodiment of the present invention.

[0026] Figure 8 This is an exploded view of the second slider and the third slider in the embodiment of the present invention.

[0027] Figure 9 This is a three-dimensional view of the third slider and the limiting block in the embodiment of the present invention.

[0028] Figure 10 This is a structural schematic diagram of the third slider in the embodiment of the present invention.

[0029] Figure 11 This is a structural schematic diagram of the second slider and the plastic part in the embodiment of the present invention.

[0030] Figure 12 This is a structural schematic diagram of the third step when the second slider and the plastic part are demolded in the embodiment of the present invention.

[0031] Figure 13 This is a structural schematic diagram of the fourth step when the second slider and the plastic part are demolded in the embodiment of the present invention.

[0032] Figure 14 This is a structural schematic diagram of the second slider and the angled lifter in the embodiment of the present invention.

[0033] Figure 15 This is a three-dimensional view of the angled lifter in the embodiment of the present invention.

[0034] Figure 16 This is a partial structural schematic diagram of the mold in the embodiment of the present invention.

[0035] Description of the reference numerals in the figure: 10. Plastic part; 20. Moving die assembly; 30. Angled guide pin; 11. Hinged profile; 12. Side hole; 13. Snap; 14. Arc portion; 15. Through hole; 21. Moving template; 22. Moving die core; 23. Top plate; 24. First slider; 25. Second slider; 26. Core pulling oil cylinder; 27. Third slider; 28. Limiting block; 29. Fixed block; 210. Angled lifter; 211. Spring; 212. Core rod; 251. Dovetail block; 252. Long groove; 253. Positioning groove; 254. First side inclined surface; 255. Insertion hole; 271. Dovetail groove; 272. Protrusion; 273. Positioning block; 274. Limiting groove; 275. First step; 276. Second step; 277. Forming portion; 2101. Second side inclined surface. Detailed implementation manner

[0036] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention. Embodiment 1

[0037] As Figure 1-2 shown, for the plastic part 10 of the rearview mirror housing, a contour structure for articulating with the body connection ear is recessed on the outer surface of the plastic part 10 to support the folding function of the rearview mirror. A through hole 15 is provided at one end of the rearview mirror close to the connection ear. In addition, side holes 12 and a buckle 13 are provided on the housing to achieve positioning and assembly between components. An arc portion 14 is upturned from one side of the articulation contour 11 towards the mirror surface to form an undercut.

[0038] As Figures 3-15 shown, in this embodiment, an automotive rearview mirror housing mold is disclosed, which includes a fixed mold assembly and a moving mold assembly 20. The moving mold assembly 20 includes: A moving mold core 22; A first slider 24, which is slidably mounted on the moving mold core 22; A second slider 25 and a third slider 27, which are slidably mounted on the moving mold core 22. The third slider 27 is obliquely mounted on the second slider 25. The second slider 25 is used to form the articulation contour 11. The third slider 27 is used to form the inner sides of the buckle 13 and the arc portion 14. The third slider 27 is inserted and cooperated with the fixed mold core on the fixed mold assembly to form the buckle 13. The combination of the first slider 24 and the second slider 25 is used to form the through hole 15. When the mold is opened, the first slider 24 is first laterally core-pulled, then the second slider 25 disengages from the arc portion 14, and then the third slider 27 drives the second slider 25 to perform synchronous lateral core-pulling.

[0039] Furthermore, in combination with Figure 3As shown in the figure, the moving die assembly 20 adopted in this embodiment includes a moving die plate 21, a moving die core 22, a top plate 23, a first slider 24 and a second slider 25, etc. These components form a moving die system with a compact structure and clear functions. Among them, the first slider 24 is slidably installed along the long side direction of the moving die plate 21 and is mainly used to realize the demolding operation of the lateral structure of the plastic part 10; while the second slider 25 is arranged in the short side direction of the moving die plate 21 and mainly undertakes the forming function of the hinged contour 11 area of the plastic part 10. The third slider 27 is obliquely arranged on the second slider 25 and forms a wedge structure with it, which is used to assist in realizing the smooth demolding of the undercut areas such as the arc part 14. Specifically, the upper end of the third slider 27 is provided with a surface for forming the inner side wall of the arc part 14, and its structural design is aimed at the undercut feature formed by the arc part 14 warping upwards from the hinged contour 11 towards the mirror surface direction. During the mold opening process, it is necessary to first drive the third slider 27 to obliquely disengage from the arc part 14 to avoid structural interference, and then the core pulling operation of the second slider 25 can be carried out to realize the step-by-step demolding strategy. In the closed state of the mold closing, the inner ends of the second slider 25 and the third slider 27 form an integrated cooperation structure and jointly abut against the surface area of the fixed die core in the fixed die assembly to ensure the integral forming accuracy of the inner side contour of the plastic part 10.

[0040] Furthermore, the combination of the second slider 25 and the third slider 27 is used to form the side hole 12 on the plastic part 10, and the side hole 12 is located at the bottom of the hinged contour 11. The inner end of the third slider 27 is provided with a forming part 277, and the forming part 277 abuts against the fixed die core to form the buckle 13 on the plastic part 10. That is, the forming part 277 is used to form the inner surface of the buckle 13, and the protrusion 272 on the parting surface of the fixed die core is used to form the inner hole of the buckle 13.

[0041] Further, in this embodiment, the first slider 24 is provided with an inclined guide hole, which is matched with the inclined guide post 30 fixed on the fixed template. During the opening and closing of the mold, the inclined guide post 30 is in oblique meshing with the inclined guide hole, thereby driving the first slider 24 to complete the lateral core-pulling action. In addition, a core-pulling oil cylinder 26 is arranged on the side of the second slider 25, and a stable power source is provided through the oil cylinder driving mode to perform the core-pulling action. To achieve precise motion control of the third slider 27, a limiting block 28 is arranged on the moving mold core 22, and a limiting groove 274 is vertically arranged on the third slider 27 at a position corresponding to the limiting block 28. In the mold clamping state, one end of the limiting block 28 is embedded and clamped inside the limiting groove 274, thereby defining the initial position of the third slider 27. The limiting block 28 is firmly installed by bolts, and the free end structure thereof includes a horizontal part and a vertical part extending downward from the horizontal end. The height of the horizontal section of the limiting block 28 is higher than the upper edge of the second slider 25 to avoid interference during the movement of the second slider 25; its vertical section is inserted into the limiting groove 274 arranged on the surface of the third slider 27, and the limiting groove 274 is arranged in the vertical direction, thereby guiding and restricting the movement path of the third slider 27 in three-dimensional space, ensuring the stable linkage of the inclined wedge mechanism and the realization of the expected demolding sequence.

[0042] Still further, in the ejection mechanism of this embodiment, the lower end of the top plate 23 is connected to the lower end of the inclined ejector 210, and the upper end of the inclined ejector 210 is embedded in the parting surface part of the moving mold core 22. To achieve the coordinated movement between the inclined ejector 210 and the second slider 25, the second slider 25 is provided with an inverted multi-step first side inclined surface 254, and the inclined ejector 210 is correspondingly provided with a multi-step second side inclined surface 2101, and a surface-to-surface contact type matching relationship is formed between the two. During the mold opening process, the core-pulling action of the second slider 25 must be completed first to reserve sufficient space for the downward movement of the third slider 27 and the upward movement of the inclined ejector 210; after the second slider 25 and the third are pulled out to the position, the inclined ejector 210 can continue its upward movement path, thereby smoothly ejecting the plastic part 10 from the mold and completing the demolding stage in the entire injection molding cycle.

[0043] Specifically, in combination with Figure 16In the structure shown, in this embodiment, a core rod 212 for molding is provided on the first slider 24, and the second slider 25 is provided with a jack 255 that is inserted and cooperates with the core rod 212. The core rod 212 is provided to precisely mold the inner surface of the through-hole 15 of the plastic part 10, while the second slider 25 is responsible for molding the inner structure of the housing area where the through-hole 15 is located, and the first slider 24 is used to form the outer surface of this housing area. Since the core rod 212 is inserted into the jack 255 of the second slider 25 to form a wrapped relationship when the mold is closed, during the mold opening and demolding stage, the first slider 24 must be driven to withdraw laterally first to release the fitting relationship between the core rod 212 and the jack 255, providing the necessary space for the subsequent movement of the second slider 25. If the first slider 24 is not withdrawn first and the second slider 25 is forced to move, it will cause interference or damage to the core rod 212 under force, not only reducing the service life of the mold, but also seriously affecting the structural integrity and molding accuracy of the plastic part 10. This structural arrangement effectively ensures the safety of the demolding action and the stability of the molding quality through a clear core-pulling sequence design.

[0044] Specifically, as shown in Figures 8-10 In this embodiment, one of the second slider 25 and the third slider 27 is obliquely provided with a dovetail groove 271, and the other is provided with a dovetail block 251 that slidably cooperates with the dovetail groove 271. A first step 275 is provided on one side of the limit groove 274 close to the cavity, and a second step 276 is provided on the side far from the cavity, and the second step 276 is higher than the first step 275. One of the second slider 25 and the third slider 27 is provided with a long groove 252, and the other is provided with a protrusion 272, and the protrusion 272 is inserted into the long groove 252 and is slidably and limitedly cooperated with it. One of the second slider 25 and the third slider 27 is provided with a positioning groove 253, and the other is provided with a positioning block 273. When the second slider 25 moves a predetermined distance away from the third slider 27 in the direction away from the cavity, the positioning block 273 snaps into the positioning groove 253, enabling the third slider 27 to move synchronously with the second slider 25.

[0045] Further, as shown in the figure, in this embodiment, a third step is formed on the surface of the third slider 27. The step structure specifically includes a notch formed on the outside of the third slider 27, and a sinking groove is further arranged in the notch to form a step structure with distinct levels, wherein the bottom of the notch serves as the second step 276, and the sinking groove located at a deeper position serves as the third step. At the same time, an oblique dovetail groove 271 and a matching dovetail block 251 are arranged between the second slider 25 and the third slider 27, and the two cooperate to form an oblique wedge structure with self-locking and guiding functions through oblique sliding. When the mold opening process begins, the limit block 28 is inserted into the limit groove 274 on the third slider 27 to limit the lateral movement of the third slider 27. At this time, the core-pulling cylinder 26 drives the second slider 25 to pull the core outward. Due to the effect of the oblique wedge structure, the lateral movement of the second slider 25 is converted into the vertical downward movement of the third slider 27, so that the third slider 27 gradually detaches from the undercut structure on the inner side of the arc portion 14. As the second slider 25 moves further, the protrusion 272 thereon slides in the long groove 252 to the end of the stroke. At the same time, the positioning block 273 is inserted into the positioning groove 253 on the third slider 27, realizing the synchronous linkage of the two. At this time, the limit block 28 also disengages from the limit groove 274, releasing the restriction on the outward movement of the third slider 27. The second slider 25 can continue to drive the third slider 27 to complete the synchronous core pulling action along the set direction, and finally make the two slide out of the plastic part 10 together to achieve complete demolding. In addition, a spring 211 is also arranged between the second slider 25 and the third slider 27. The spring 211 is in a pre-stressed state and has an elastic tendency to urge the second slider 25 to move away from the third slider 27, thereby providing additional driving force for the second slider 25 in the initial core pulling stage, further improving the demolding efficiency and reliability.

[0046] Furthermore, a fixing block 29 is fixedly mounted on the upper part of the second slider 25, and the fixing block 29 is connected to the third slider 27 via a connecting rod (not marked in the figure). The third slider 27 and the connecting rod are slidably matched, so that the third slider 27 can move towards or away from each other relative to the fixing block 29. The spring 211 is sleeved on the connecting rod, and one end of the spring 211 is tightly against the third slider 27, and the other end is tightly against the fixing block 29.

[0047] Furthermore, the mold can use either recycled waste plastic or conventional plastic.

[0048] The mold opening operation is carried out in the following steps: Step 1: The moving mold assembly 20 and the fixed mold assembly start the mold opening operation in a direction away from each other. During this process, the angled guide pillar 30 provided on the fixed mold plate is in an angled fit with the angled guide groove on the first slider 24, driving the first slider 24 to perform side core pulling preferentially. As the first slider 24 moves, the core rod 212 provided thereon disengages from the insertion hole 255 on the second slider 25 and exits the through hole 15 on the plastic part 10, not only releasing the structural interference of the core rod 212 on the lateral movement of the second slider 25 but also providing necessary movement space for the subsequent actions of each slider.

[0049] Step 2: The core pulling oil cylinder 26 is activated, driving the second slider 25 to move outward in a predetermined direction. During its movement, the inverted multi-step first side inclined surface 254 provided on the second slider 25 gradually separates from the second side inclined surface 2101 on the angled ejector 210, releasing the space for the subsequent ejection of the angled ejector 210. At the same time, under the restraint of the limit block 28 on the moving mold core 22, the third slider 27 remains in a horizontal position unchanged. Since there is a dovetail structure with an angled sliding fit between the second slider 25 and the third slider 27, the horizontal movement of the second slider 25 is converted into a vertically downward movement of the third slider 27, so that the third slider 27 gradually disengages from the interference area of the undercut inside the arc portion 14. Meanwhile, the limit groove 274 on the third slider 27 also gradually disengages from the insertion position of the limit block 28.

[0050] Step 3: When the limit groove 274 is completely disengaged from the limit block 28 and no longer restricted by it, the third slider 27 is in a freely movable state. As the second slider 25 continues to be driven outward by the core pulling oil cylinder 26, the protrusion 272 provided thereon slides to the end in the long groove 252 of the third slider 27, and the positioning block 273 is in positioning engagement with the positioning groove 253, forming a reliable linkage mechanism. At this time, the second slider 25 drives the third slider 27 to move outward synchronously until the third slider 27 completely moves out of the plastic part 10, realizing the complete demolding of the undercut part.

[0051] Step 4: After the second slider 25 and the third slider 27 complete the core pulling action, the top plate 23 starts to drive the angled ejector 210 provided thereon to eject upward, smoothly pushing the plastic part 10 out of the mold and completing the mold opening and demolding process of the entire mold.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. 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 circumstances.

[0055] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation on the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An automotive rearview mirror housing mold, comprising a fixed mold assembly and a movable mold assembly, characterized in that, The moving die assembly includes: A moving die core; A first slider, which is slidably mounted on the moving die core; A second slider and a third slider, which are slidably mounted on the moving die core. The third slider is obliquely mounted on the second slider. The second slider is used for forming the articulated contour, and the third slider is used for forming the inside of the buckle and the arc portion. The third slider is inserted and penetrated with the fixed die core on the fixed die assembly to form the buckle. The combination of the first slider and the second slider is used for forming the through hole. When the mold is opened, the first slider is pre-laterally core-pulled, then the second slider disengages from the arc portion, and then the third slider drives the second slider to perform synchronous lateral core-pulling.

2. The automotive rearview mirror housing mold according to claim 1, characterized in that: The first slider is provided with a core rod, and the second slider is provided with a jack, and the core rod and the jack are inserted and penetrated with each other.

3. The automotive rearview mirror housing mold according to claim 1, characterized in that: The moving die core is provided with a limit block, and the third slider is vertically provided with a limit groove corresponding to the position of the limit block. When the mold is closed, one end of the limit block is clamped into the limit groove, and after the mold is opened, the limit block disengages from the limit groove.

4. The automotive rearview mirror housing mold according to claim 1, wherein: One of the second slider and the third slider is obliquely provided with a dovetail groove, and the other is provided with a dovetail block that slidably cooperates with the dovetail groove.

5. The automotive rearview mirror housing mold according to claim 3, characterized in that: A first step is provided on one side of the limit groove close to the cavity, and a second step is provided on the side far from the cavity, and the second step is higher than the first step.

6. The automotive rearview mirror housing mold according to claim 1, characterized in that: One of the second slider and the third slider is provided with a long groove, and the other is provided with a protrusion, and the protrusion is inserted into the long groove and is slidably and limitably cooperated with it.

7. The automotive rearview mirror housing mold according to claim 1, characterized in that: One of the second slider and the third slider is provided with a positioning groove, and the other is provided with a positioning block. When the second slider moves away from the cavity relative to the third slider to a predetermined distance, the positioning block is clamped into the positioning groove, so that the third slider can move synchronously with the second slider.

8. The automotive rearview mirror housing mold according to claim 1, wherein: It further includes a lifter, and the lifter is in contact and cooperation with the second slider.

9. The automotive rearview mirror housing mold according to claim 8, characterized in that: The second slider is provided with an inverted multi-step first side slope, and the lifter is provided with a multi-step second side slope, and the first side slope and the second side slope are in contact and cooperation.

10. The automotive rearview mirror housing mold according to claim 1, wherein: A spring is provided between the second slider and the third slider, and the spring has an elastic tendency to move the second slider away from the third slider.

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