Injection mold and injection method for automobile tail lamp cover

Abstract

The application relates to the technical field of injection molds, in particular to an injection mold and an injection method for an automobile tail lamp cover, which comprise a lower mold base and an upper mold base. When the upper mold base is lowered relative to the lower mold base to close the mold, the upper mold core, the lower mold core and the side position can be linked to move along a second direction, so that the upper mold core, the lower mold core and the side position surround a forming chamber for injection molding the automobile tail lamp cover. The surface of the side position facing the forming chamber is provided with a texture part. The side position is provided with a forming pin for injection molding a mounting hole. A first spring is arranged between the forming pin and the side position, and the first spring can drive the forming pin to move upward along a first direction. The upper mold base is provided with a pull hook. When the pull hook is connected with the forming pin, the pull hook can pull the forming pin to move along the first direction and be disconnected. Compared with the prior art, the demolding operation of the forming pin and the side position can be completed by moving the upper mold base by a first distance and a third distance, the mold opening action is less, and therefore the efficiency of the injection mold for producing the automobile tail lamp cover is further improved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold and injection method for an automobile taillight cover. Background Technology

[0002] Automotive parts are the collective term for the various units that make up a car and the parts that serve the car as a whole. The plastic lens cover of a car taillight is an important component of a car taillight. It is usually used to protect the bulb and circuit inside the taillight, and also serves the functions of focusing light and decoration. The plastic lens cover of a car taillight is generally formed by injection molding. After the plastic cools and solidifies in the mold, it forms the plastic lens cover of the taillight.

[0003] Please refer to the following: Figure 1 and Figure 2 The invention is a car taillight cover produced by the inventor. This car taillight cover includes a taillight cover body 300 and a mounting plate 3001 integrally formed on one end of the taillight cover body 300. The side of the taillight cover body 300 facing the mounting plate 3001 needs to be textured 3003 (also known as texturing, etching, or engraving), and mounting holes 3003 are provided on the mounting plate 3001.

[0004] Based on the aforementioned structure of the automotive taillight cover, the inventor's initial production method for automotive taillight covers involved injection molding the taillight cover body and mounting plate using an injection mold with the cooperation of the upper mold base, lower mold base, and side slide. Subsequently, a CNC machining center was used to mill the texture on the side of the taillight cover body and mill the mounting holes on the mounting plate. The drawbacks of this production process are that it involves many processing steps, resulting in low production efficiency. Moreover, the repeated clamping and processing of the automotive taillight cover not only poses the problem of damaging the taillight cover but also results in low precision in the machining of the mounting holes. If the position of the mounting holes does not meet the design requirements, it will affect subsequent assembly operations.

[0005] Based on the shortcomings in the above-mentioned production operations, the inventors later improved the injection mold. Through the cooperation of the upper mold base, lower mold base, side slide 4001 and side insert 4002 of the injection mold, a one-time injection molding is performed to form the taillight cover body, mounting plate, side texture of the taillight cover body and mounting holes of the mounting plate. However, since the taillight cover body and the mounting plate are not on the same surface, it is necessary to control the mold opening movement direction of the side slide and the side insert separately. Hydraulic cylinders need to be configured one by one to drive the movement of the side slide and the side insert. This structure leads to a complex overall structure of the injection mold and high manufacturing cost. Moreover, the mold opening action is numerous, and the production efficiency is still limited.

[0006] Therefore, a new technical solution needs to be researched to address the above problems. Summary of the Invention

[0007] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide an injection mold for automobile taillight covers, effectively solving the technical defects of existing injection molds for injection molding automobile taillight covers, which have complex structures and low production efficiency.

[0008] This invention provides an injection mold for an automobile taillight cover, comprising:

[0009] The lower mold base has a lower mold core at the top, and a lower punch is located at the top of the lower mold core.

[0010] An upper mold base is movably mounted on top of a lower mold base; an upper mold core is located at the bottom of the upper mold base, and an upper die cavity is located at the bottom of the upper mold core; and,

[0011] The side slide is movable and installed on the lower mold base; when the upper mold base moves down relative to the lower mold base to close the mold, it can move in conjunction with the side slide along the second direction, so that the upper mold core, the lower mold core and the side slide form a molding cavity for injection molding of automobile taillight cover.

[0012] The side slide facing the molding chamber has a textured part for etching the taillight cover. The side slide has a molding pin for injection molding mounting holes. A first spring is provided between the molding pin and the side slide. The first spring can drive the molding pin to move upward in a first direction. The upper mold base has a pull hook. When the pull hook is connected to the molding pin, it can pull the molding pin to move in the first direction and disengage.

[0013] The beneficial effect of the injection mold for the car taillight cover provided by the present invention is that after the upper mold base and the lower mold base are closed to complete the injection molding of the car taillight cover; the upper mold base moves upward relative to the lower mold base by a first distance, and the linkage pull hook pulls the molding insert upward and causes the pull hook to disengage from the molding insert; at the same time as the pull hook disengages from the molding insert, the first spring drives the molding insert to move upward along the first direction by a second distance to complete demolding; the upper mold base continues to move upward relative to the lower mold base by a third distance, and the linkage side slide moves along the second direction, so that the side slide and the upper mold core are demolded from the car taillight cover;

[0014] Compared with existing technologies, this method involves setting a side slide that can move in a second direction on the lower mold base, and setting a molding insert that can move in a first direction on the side slide; by setting a hook on the upper mold base, after the upper mold base moves up a first distance, the molding insert can be pulled along the first direction and disengaged by the hook, providing pre-tension to the molding insert and enhancing the tension of the first spring, so that the first spring can reliably and effectively pull the molding insert from the mounting hole position for demolding. Finally, by moving the upper mold base up a second distance, the side slide moves along the second direction to complete the demolding of the side slide and the upper mold core from the car taillight cover. This mold opening action does not require separate hydraulic cylinders for the side slide and the molding insert, which simplifies the overall structure of the injection mold and reduces the manufacturing cost of the injection mold; moreover, the demolding operation of the molding insert and the side slide can be completed by moving the upper mold base up a first distance and a third distance, with fewer mold opening actions, thereby further improving the efficiency of injection mold production of car taillight covers.

[0015] As a preferred embodiment, the side slide is movably located on the left side of the lower mold core, the side slide is provided with a first inclined hole, and the bottom of the upper mold base is provided with a first inclined rod that is inserted into the first inclined hole;

[0016] When the upper mold base moves down relative to the lower mold base, the first inclined rod can move to the right along the second direction in conjunction with the side slide; when the upper mold base moves up relative to the lower mold base, the first inclined rod can move to the left along the second direction in conjunction with the side slide.

[0017] As a preferred embodiment, the first oblique hole is an elongated through hole, and the first length is defined in the left-right direction of the first oblique hole; the diameter of the first oblique rod is defined as the first diameter, and the first length is greater than the first diameter;

[0018] When the upper mold base closes relative to the lower mold base, the first inclined rod abuts against the right side of the first inclined hole; when the upper mold base moves up a first distance relative to the lower mold base, the first inclined rod does not contact the first inclined hole; when the upper mold base moves up a second distance relative to the lower mold base, the first inclined rod abuts against the left side of the first inclined hole and moves to the left in conjunction with the side slide.

[0019] As a preferred embodiment, the molded insert includes an insert body and an insert moving base, wherein the insert body is detachably mounted on the bottom of the insert moving base;

[0020] The side slide is provided with a pin moving groove and a seat moving groove. One end of the pin moving groove extends downward through the outer surface of the side slide in a first direction, and one end of the seat moving groove extends upward through the outer surface of the side slide in a first direction. The pin moving groove and the seat moving groove are interconnected. The pin body can be movably installed in the pin moving groove, and the pin moving seat can be movably installed in the seat moving groove.

[0021] As a preferred embodiment, the top of the pin moving base is provided with a first flat surface, the right side of the first flat surface is provided with a first inclined surface, and the bottom of the first inclined surface is provided with a first groove;

[0022] The hook includes a hook body, a clearance notch located at the bottom left side of the hook body, and a first protrusion located at the bottom of the clearance notch and extending to the left.

[0023] When the upper mold base moves down, the first plane can abut against the top of the clearance notch, the first protrusion is inserted into the first groove, and the forming pin moves down along the first direction through the action of the pull hook, so that the pin body protrudes outward from the right surface of the side slide from the pin moving groove.

[0024] As a preferred embodiment, the left side of the seat moving groove is provided with an installation notch, which extends upward through the outer surface of the side moving part in the first direction, and the installation notch is detachably provided with a limiting plate;

[0025] The left side of the needle-mounting seat is provided with a limiting groove, the bottom of the limiting groove is the first limiting plane, and the top of the limiting groove extends upward through the outer surface of the needle-mounting seat in the first direction;

[0026] When the upper mold base is closed relative to the lower mold base, the distance between the limiting plate and the first limiting plane is set to form the first width; when the upper mold base is opened relative to the lower mold base, the first spring acts to move the forming insert upward along the first direction by a second distance, so that the limiting plate abuts against the first limiting plane.

[0027] As a preferred embodiment, a first mounting hole is provided at the center of the bottom of the needle moving base, and the needle body is located at the bottom of the needle moving base and on both sides of the first mounting hole;

[0028] One end of the first spring abuts against the bottom of the first mounting hole, and the other end abuts against the bottom of the seat moving groove; or, one end of the first spring is connected to the bottom of the first mounting hole, and the other end is connected to the bottom of the seat moving groove.

[0029] As a preferred option, the upper mold base is equipped with a glue injection port and a runner plate;

[0030] The runner plate is equipped with a runner channel. One end of the runner channel is connected to the injection port, and the other end is equipped with a nozzle, which is connected to the molding chamber.

[0031] As a preferred embodiment, it also includes an ejector plate, which is movable up and down and mounted on the lower mold base;

[0032] The upper surface of the ejector plate is provided with multiple ejector pins, all of which extend upward through the lower mold base and the lower mold core toward the molding cavity.

[0033] When the ejector plate moves upward, it can drive multiple ejector pins to extend from the upper surface of the lower mold core to eject the car taillight cover from the lower mold core; when the ejector plate moves downward, it can drive multiple ejector pins to retract from the upper surface of the lower mold core.

[0034] This invention also provides an injection molding method for an automobile taillight cover, and an injection mold for the automobile taillight cover. The injection molding method includes:

[0035] S1. Provide an injection mold for the taillight cover of an automobile, install the injection mold for the taillight cover in the injection molding machine, and drive the upper mold base and ejector plate to move through the ejection mechanism of the injection molding machine.

[0036] S2. The ejection mechanism drives the upper mold base to move down relative to the lower mold base to close the mold, and moves the side slide in conjunction with the upper mold core and the lower mold core to form a molding cavity, and the pull hook connects the molding insert hook.

[0037] S3. The injection molding machine injects the hot melt slurry into the injection port, and the hot melt slurry is injected into the molding chamber through the distribution channel and nozzle.

[0038] S4. The injection molding machine holds the hot melt slurry in the injection mold under pressure and cools it for 30-180 seconds.

[0039] S5. The ejection mechanism drives the upper mold base to move up a first distance, and the hook moves the forming insert along the first direction and disengages; after the hook disengages from the forming insert, the first spring drives the forming insert to move up a second distance along the first direction, so that the forming insert is demolded from the mounting hole of the car taillight cover.

[0040] S6. The ejection mechanism drives the upper mold base to move up a third distance, and the side slide moves away from the lower mold core along the second direction, so that the upper mold core and the side slide are demolded from the car taillight cover.

[0041] S7. The ejector mechanism drives the ejector plate to move up, and uses the ejector pins to push the car taillight cover from the lower mold core upward and unload it.

[0042] S8, repeat S2-S7 for continuous injection molding of automotive taillight covers.

[0043] The beneficial effects of the injection molding method for automotive taillight covers provided by the present invention are as follows: Compared with the prior art, firstly, the installation method and moving direction of the side slide and molding insert are optimized, so that the molding insert and side slide can be demolded sequentially during the upward movement of the upper mold base. It does not require hydraulic cylinders to separately control the movement of the side slide and molding insert and simplifies the mold opening action, which is conducive to improving the production efficiency of injection molds.

[0044] Secondly, the upper mold base can be moved at different strokes to control the demolding of the molding insert and then the side slide demolding. This structure allows the injection molding mounting holes of the car taillight cover to be textured at the same time, without the need for subsequent milling of the mounting holes and texture milling. This simplifies the processing technology of the car taillight cover and ensures that the positional accuracy of the mounting holes meets the design requirements. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 It is a car taillight cover that is injection molded using an injection mold in the existing technology;

[0047] Figure 2 This is a working diagram of the existing technology used for texturing automotive taillight covers and injection molding mounting holes;

[0048] Figure 3 This is a three-dimensional structural schematic diagram of the injection mold for the automobile taillight cover provided in the embodiments of this application;

[0049] Figure 4 yes Figure 3 A three-dimensional structural diagram of the lower mold base of the injection mold for the automotive taillight cover is shown.

[0050] Figure 5 yes Figure 3 A three-dimensional structural diagram of the upper mold base of the injection mold for the car taillight cover is shown.

[0051] Figure 6 yes Figure 3 A cross-sectional view at point AA of the injection mold for the car taillight cover shown.

[0052] Figure 7 yes Figure 6 A magnified view of part A of the injection mold for the car taillight cover shown;

[0053] Figure 8 yes Figure 3 A cross-sectional view of the injection mold for the car taillight cover shown at point BB;

[0054] Figure 9 yes Figure 8 A magnified view of part B of the injection mold for the car taillight cover shown;

[0055] Figure 10 yes Figure 3 The diagram shows a three-dimensional structure of the injection mold for the automotive taillight cover, including the side slide, molding insert, and pull hook.

[0056] Figure 11 yes Figure 10 The diagram shows another angle of the three-dimensional structure of the injection mold for the automotive taillight cover, including the side profile, molding insert, and pull hook.

[0057] Figure 12 yes Figure 10 The diagram shows an exploded three-dimensional structure of the injection mold for the automotive taillight cover, including the side slide, molding insert, and pull hook.

[0058] Figure 13 yes Figure 12 The diagram shows an exploded three-dimensional view of the side profile, molding insert, and pull hook of the injection mold for the automotive taillight cover.

[0059] Figure 14 yes Figure 10 The side profile, molding insert, and pull hook of the injection mold for the car taillight cover are shown in a cross-sectional view at the CC section.

[0060] Figure 15 yes Figure 14 The diagram shows the side position of the injection mold for the automotive taillight cover, the molding insert, and the state of the hook being disengaged from the molding insert.

[0061] Figure 16 yes Figure 10 The side profile, molding insert, and pull hook of the injection mold for the car taillight cover are shown in the DD section view.

[0062] Figure 17 yes Figure 3 The taillight cover shown is a car taillight cover produced by injection molding using an injection mold.

[0063] The following are the labeling elements in the figure:

[0064] 100. Injection mold for automotive taillight cover; 1001. Molding chamber; 10. Lower mold base; 11. Lower mold core; 111. Lower punch; 12. Ejector plate; 121. Ejector pin; 20. Upper mold base; 21. Upper mold core; 211. Upper die; 22. Hook; 221. Hook body; 222. Clearance notch; 223. First protruding hook; 23. First inclined bar; 24. Injection port; 25. Runner plate; 26. Sprue; 27. Ejector block; 271. First abutment inclined surface; 30. Side slide; 31. Textured part; 32. First inclined hole; 33. Insert pin moving groove; 331. Mounting notch; 332. Limiting plate; 34. Seat moving groove; 40. Molded insert; 41. Insert body; 42. Insert moving seat; 421. First plane; 422. First inclined plane; 423. First groove; 424. Limiting groove; 4241. First limiting plane; 425. First mounting hole; 50. First spring; x1. First direction; y1. Second direction; L1. First length; D1. First diameter; W1. First width; 200. Automotive taillight cover; 2001. Mounting plate; 2002. Mounting hole; 2003. Texture; 300. Taillight cover body; 3001. Mounting plate; 3002. Mounting hole; 3003. Texture; 4001. Side position; 4002. Side insert. Detailed Implementation

[0065] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0066] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0067] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0069] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0070] Please refer to the following: Figures 3 to 17 The injection mold 100 for the automotive taillight cover provided in this application embodiment will now be described. The injection mold 100 for the automotive taillight cover includes a lower mold base 10, an upper mold base 20, and a side slide 30.

[0071] The lower mold base 10 is provided with a lower mold core 11 at the top, and a lower punch 111 is provided at the top of the lower mold core 11; the upper mold base 20 is movably installed on the top of the lower mold base 10; the upper mold base 20 is provided with an upper mold core 21 at the bottom, and an upper die 211 is provided at the bottom of the upper mold core 21; the side slide 30 is movably installed on the lower mold base 10. When the upper mold base 20 moves down relative to the lower mold base 10 to close the mold, it can move the side slide 30 in conjunction with the second direction y1, so that the upper mold core 21, the lower mold core 11 and the side slide 30 form a molding chamber 1001 for injection molding of automobile taillight cover. The side slide 30 has a textured part 31 on the surface facing the molding chamber 1001 for texturing the taillight cover. The side slide 30 has a molding insert 40 for injection molding mounting holes 2002. A first spring 50 is provided between the molding insert 40 and the side slide 30. The first spring 50 can drive the molding insert 40 to move upward along the first direction x1. The upper mold base 20 has a pull hook 22. When the pull hook 22 is hooked to the molding insert 40, it can pull the molding insert 40 to move along the first direction x1 and disengage.

[0072] Specifically, compared with the prior art, by providing a side slide 30 that can move in the second direction in the lower mold base 10, and providing a forming insert 40 that can move in the first direction in the side slide 30; by providing a pull hook 22 in the upper mold base 20, after the upper mold base 20 moves upward by a first distance, the forming insert 40 can be pulled along the first direction and disengaged by the pull hook 22, providing a pre-tension force for the forming insert 40 and enhancing the tension of the first spring 50, so that the first spring 50 can reliably and effectively pull the forming insert 40 out of the mounting hole 2002 position. Finally, By moving the upper mold base 20 upward by a second distance, the side slide 30 moves along the second direction to complete the demolding of the side slide 30 and the upper mold core 21 from the car taillight cover. This mold opening action does not require separate hydraulic cylinders for the side slide 30 and the molding insert 40, which simplifies the overall structure of the injection mold and reduces the manufacturing cost of the injection mold. Moreover, the demolding operation of the molding insert 40 and the side slide 30 can be completed by moving the upper mold base 20 upward by a first distance and a third distance. The mold opening action is less, which further improves the efficiency of injection mold production of car taillight covers.

[0073] It should be noted that the injection mold 100 for the taillight cover can integrally injection mold the taillight cover 200 including the mounting plate 2001 through the lower punch 111, the upper die 211 and the side slide 30, and the textured part 31 of the side slide 30 is used to texture the side of the taillight cover facing the mounting plate 2001 2003, and the mounting hole 2002 is injection molded at the position of the mounting plate 2001 through the molding insert 40.

[0074] In some embodiments, the side slide 30 is movably disposed on the left side of the lower mold core 11. The side slide 30 is provided with a first inclined hole 32, and the bottom of the upper mold base 20 is provided with a first inclined rod 23 that inserts into the first inclined hole 32. When the upper mold base 20 moves down relative to the lower mold base 10, the first inclined rod 23 can move the side slide 30 to the right along the second direction y1. When the upper mold base 20 moves up relative to the lower mold base 10, the first inclined rod 23 can move the side slide 30 to the left along the second direction y1.

[0075] Specifically, the first oblique hole 32 is an elongated through hole, and its left-right direction is defined as the first length L1; the diameter of the first oblique rod 23 is defined as the first diameter D1, and the first length L1 is greater than the first diameter D1; when the upper mold base 20 is closed relative to the lower mold base 10, the first oblique rod 23 abuts against the right side of the first oblique hole 32; when the upper mold base 20 moves upward relative to the lower mold base 10 by a first distance, the first oblique rod 23 does not contact the first oblique hole 32; when the upper mold base 20 moves upward relative to the lower mold base 10 by a second distance, the first oblique rod 23 abuts against the left side of the first oblique hole 32 and moves the side slide 30 to the left in conjunction with it. By setting the length of the first oblique hole 32 to be greater than the diameter of the first oblique rod 23, it is possible to achieve the movement of the forming insert 40 in conjunction with the first upward movement of the upper mold base 20, and the movement of the side slide 30 in conjunction with the second upward movement of the upper mold base 20, thereby solving the technical defect in the traditional technology that the forming insert 40 and the side slide 30 need to be driven by hydraulic cylinders one by one.

[0076] More specifically, the molded insert 40 includes an insert body 41 and an insert moving seat 42. The insert body 41 is detachably installed at the bottom of the insert moving seat 42. The side slide 30 is provided with an insert moving groove 33 and a seat moving groove 34. One end of the insert moving groove 33 penetrates the outer surface of the side slide 30 downward along the first direction x1, and one end of the seat moving groove 34 penetrates the outer surface of the side slide 30 upward along the first direction x1. The insert moving groove 33 and the seat moving groove 34 are interconnected. The insert body 41 is movably installed in the insert moving groove 33, and the insert moving seat 42 is movably installed in the seat moving groove 34.

[0077] Preferably, the top of the insert pin moving seat 42 is provided with a first plane 421, the right side of the first plane 421 is provided with a first inclined surface 422, and the bottom of the first inclined surface 422 is provided with a first groove 423; the hook 22 includes a hook body 221, an avoidance notch 222 provided at the bottom left side of the hook body 221, and a first protrusion 223 provided at the bottom of the avoidance notch 222 and extending to the left; when the upper mold seat 20 moves down, the first plane 421 can abut against the top of the avoidance notch 222, the first protrusion 223 is inserted into the first groove 423, and the insert pin 40 is formed to move down along the first direction x1 by the action of the hook 22, so that the insert pin body 41 protrudes outward from the insert pin moving groove 33 onto the right surface of the side position 30.

[0078] Specifically, by setting a structure in which the clearance notch 222 abuts against the first plane 421, the upper mold base 20 and the lower mold base 10 can effectively stop the forming insert 40 after mold closing, and the insert body 41 can reliably extend out of the outer surface of the side slide 30 and into the molding cavity 1001 for injection molding mounting hole. Furthermore, the first inclined surface 422 facilitates the smooth engagement of the first hook 223 with the first groove 423 during the mold closing process of the upper mold base 20 and the lower mold base 10. Moreover, by controlling the upper mold base 20 to move upward by a first distance, the forming insert 40 can be pulled upward along the first direction x1, providing a pre-tension force to the forming insert 40, thereby increasing the elastic force of the first spring 50. This allows the first spring 50 to more reliably drive the insert body 41 to move from the first direction x1, allowing the forming insert 40 as a whole to move a second distance along the first direction x1, so that the insert body 41 and the mounting hole of the car taillight can be demolded.

[0079] In other embodiments, the left side of the seat moving groove 34 is provided with an installation notch 331, which extends upward along the first direction x1 through the outer surface of the side slide 30. The installation notch 331 is detachably provided with a limiting plate 332. The left side of the insert moving seat is provided with a limiting groove 424, the bottom of which is a first limiting plane 4241, and the top of which extends upward along the first direction x1 through the outer surface of the insert moving seat. When the upper mold base 20 is closed relative to the lower mold base 10, the distance between the limiting plate 332 and the first limiting plane 4241 is set to form a first width W1. When the upper mold base 20 is opened relative to the lower mold base 10, the first spring 50 acts to form the insert 40 to move upward along the first direction x1 by a second distance, so that the limiting plate 332 abuts against the first limiting plane 4241.

[0080] It should be noted that the first width between the limiting plate 332 and the first limiting plane 4241 can be changed by replacing the limiting plate 332 with one of different thicknesses, so as to adapt to the specific stroke of the forming insert 40 moving upward along the first direction x1 by a second distance.

[0081] Specifically, a first mounting hole 425 is provided at the center of the bottom of the needle moving seat, and the needle body 41 is provided at the bottom of the needle moving seat and located on both sides of the first mounting hole 425; one end of the first spring 50 abuts against the bottom of the first mounting hole 425, and the other end abuts against the bottom of the seat moving groove 34; or, one end of the first spring 50 is connected to the bottom of the first mounting hole 425, and the other end is connected to the bottom of the seat moving groove 34.

[0082] In other embodiments, the upper mold base 20 is provided with an injection port 24 and a runner plate 25; the runner plate 25 is provided with a runner channel, one end of which is connected to the injection port 24, and the other end is provided with a nozzle 26, which is connected to the molding chamber 1001. Preferably, the injection mold 100 for the car taillight cover is a double-cavity injection mold. Through the design of the runner plate 25, hot melt slurry can be injected into two molding chambers 1001 using one injection port 24, so as to realize the injection molding of two car taillight covers 200 in one mold closing.

[0083] Specifically, it also includes an ejector plate 12, which is movable up and down and mounted on the lower mold base 10. The upper surface of the ejector plate 12 is provided with a plurality of ejector pins 121, which extend upward through the lower mold base 10 and the lower mold core 11 toward the molding cavity 1001. When the ejector plate 12 moves upward, it can drive the plurality of ejector pins 121 to extend out from the upper surface of the lower mold core 11 to eject the car taillight cover from the lower mold core 11. When the ejector plate 12 moves downward, it can drive the plurality of ejector pins 121 to retract from the upper surface of the lower mold core 11.

[0084] More specifically, the upper mold base 20 is provided with a stop block 27, and the bottom of the side of the stop block 27 facing the upper mold core 21 is provided with a first abutting inclined surface 271. When the upper mold base 20 is closed relative to the lower mold base 10, the first inclined rod 23 can abut against the first abutting inclined surface 271. At the same time, the left side of the side slide 30 can abut against the surface of the stop block 271, thereby performing mold locking operation on the side slide. This ensures that the side slide will not move when hot melt is injected into the molding cavity and during subsequent pressure holding, thereby further improving the injection molding yield of the automotive taillight cover.

[0085] In other embodiments, an injection molding method for an automotive taillight cover is also provided, using an injection mold 100 for the automotive taillight cover, the injection molding method comprising:

[0086] S1. Provide an injection mold 100 for a car taillight cover, install the injection mold 100 for the car taillight cover in an injection molding machine, and drive the upper mold base 20 and the ejector plate 12 to move through the ejection mechanism of the injection molding machine.

[0087] S2. The ejection mechanism drives the upper mold base 20 to move down relative to the lower mold base 10 to close the mold, and moves the side slide 30 together with the upper mold core 21 and the lower mold core 11 to form the molding cavity 1001, and the pull hook 22 hooks the molding insert 40.

[0088] S3. The injection molding machine injects hot melt paste into the injection port 24, and the hot melt paste is injected into the molding chamber 1001 through the diversion channel and nozzle 26.

[0089] S4. The injection molding machine holds the hot melt slurry in the injection mold under pressure and cools it for 30-180 seconds.

[0090] S5. The ejection mechanism drives the upper mold base 20 to move up a first distance, and the pull hook 22 moves the forming insert 40 up along the first direction x1 and disengages; after the pull hook 22 disengages from the forming insert 40, the first spring 50 drives the forming insert 40 to move up a second distance along the first direction x1, so that the forming insert 40 completes demolding from the mounting hole of the car taillight cover.

[0091] S6. The ejection mechanism drives the upper mold base 20 to move up a third distance, and the side slide 30 moves away from the lower mold core 11 along the second direction y1, so that the upper mold core 21 and the side slide 30 are demolded from the car taillight cover.

[0092] S7. The ejector mechanism drives the ejector plate 12 to move upward, and uses the ejector pin 121 to push the car taillight cover upward from the lower mold core 11 and unload it.

[0093] S8, repeat S2-S7 for continuous injection molding of automotive taillight covers.

[0094] Specifically, in S5, the ejection mechanism drives the upper mold base 20 to move upward by a first distance. The hook 22, in conjunction with the forming insert 40, moves upward along the first direction x1 and then disengages. This enables the upper mold base 20 to move upward by a first distance, pulling the forming insert 40 upward along the first direction x1, providing pre-tension to the forming insert 40. This achieves a dual-drive method, combining mechanical drive of the forming insert 40 and elastic drive of the forming insert 40 by the first spring 50, which improves the demolding reliability of the forming insert 40. Simultaneously, the hook 22, in conjunction with the forming insert 40, moves upward along the first direction x1 and then disengages, facilitating the control of the first spring 50 to drive the forming insert 40 upward by a second distance along the first direction x1. At this point, it is unaffected by the upward movement of the upper mold base 20, and the upper mold base 20 and the forming insert 40 are disengaged, thus facilitating the subsequent movement of the upper mold base 20 in conjunction with the side slide 30.

[0095] Preferably, when the upper mold base 20 moves up a first distance of 4mm, the first protrusion 223 of the pull hook 22 disengages from the first groove 423. When the upper mold base 20 continues to move up from the first distance to 8mm, the first spring 50 drives the forming insert 40 to move up 4mm along the first direction x1, so that the limiting plate 332 abuts against the first limiting plane 4241 of the limiting groove 424, completing the demolding of the insert body 41 from the mounting hole and its retraction into the insert moving groove 33. After the upper mold base 20 moves up from the first distance to 8mm, it continues to move up 8mm, which is the third distance of the upper mold base 20. At this time, the upper mold base 20 can move to the left along the second direction y2 through the linkage of the first inclined rod 23 with the side slide 30, completing the demolding operation of the side slide 30 and the car taillight cover.

[0096] The above are merely preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present invention.

Claims

1. An injection mold for an automobile taillight cover, comprising: The lower mold base (10) has a lower mold core (11) on the top, and a lower punch (111) is provided on the top of the lower mold core (11). An upper mold base (20) is movably mounted on top of a lower mold base (10); an upper mold core (21) is provided at the bottom of the upper mold base (20), and an upper die cavity (211) is provided at the bottom of the upper mold core (21); and, The side slide (30) is movably installed on the lower mold base (10); when the upper mold base (20) moves down relative to the lower mold base (10) to close the mold, it can move the side slide (30) in conjunction with the second direction (y1) so that the upper mold core (21), the lower mold core (11) and the side slide (30) form a molding cavity for injection molding of automobile taillight cover; Its features are, The side slide (30) facing the molding chamber has a textured part (31) for texturing the taillight cover. The side slide (30) has a molding insert (40) for injection molding mounting holes. A first spring (50) is provided between the molding insert (40) and the side slide. The first spring (50) can drive the molding insert (40) to move upward along the first direction (x1). The upper mold base (20) has a hook (22). When the hook (22) is hooked to the molding insert (40), it can pull the molding insert (40) to move along the first direction (x1) and disengage. The side slide (30) is movably located on the left side of the lower mold core (11). The side slide (30) is provided with a first inclined hole (32). The bottom of the upper mold base (20) is provided with a first inclined rod (23) that inserts into the first inclined hole (32). When the upper mold base (20) moves down relative to the lower mold base (10), the first inclined rod (23) can move the side slide (30) to the right along the second direction (y1). When the upper mold base (20) moves up relative to the lower mold base (10), the first inclined rod (23) can move the side slide (30) to the left along the second direction (y1). The first inclined hole (32) is a long through hole. The first length (L1) is defined as the left and right direction of the first inclined hole (32). The diameter of the first inclined rod (23) is defined as the first diameter (D1). The first length (L1) is greater than the first diameter (D1). When the upper mold base (20) closes relative to the lower mold base (10), the first inclined rod (23) abuts against the right side of the first inclined hole (32). When the upper mold base (20) moves up a first distance relative to the lower mold base (10), the first inclined rod (23) does not contact the first inclined hole (32). When the upper mold base (20) moves up a second distance relative to the lower mold base (10), the first inclined rod (23) abuts against the left side of the first inclined hole (32) and moves to the left in conjunction with the side slide (30).

2. The injection mold for the automobile taillight cover according to claim 1, characterized in that, The molded pin (40) includes a pin body (41) and a pin moving seat (42), wherein the pin body (41) is detachably installed at the bottom of the pin moving seat (42); The side slide (30) is provided with a pin moving groove (33) and a seat moving groove (34). One end of the pin moving groove (33) extends downward along the first direction (x1) through the outer surface of the side slide (30), and one end of the seat moving groove (34) extends upward along the first direction (x1) through the outer surface of the side slide (30). The pin moving groove (33) and the seat moving groove (34) are interconnected. The pin body (41) is movably installed in the pin moving groove (33), and the pin moving seat (42) is movably installed in the seat moving groove (34).

3. The injection mold for the automobile taillight cover according to claim 2, characterized in that, The pin moving base (42) has a first plane (421) on the top, a first inclined surface (422) on the right side of the first plane (421), and a first groove (423) at the bottom of the first inclined surface (422). The hook (22) includes a hook body (221), a clearance notch (222) located at the bottom left side of the hook body (221), and a first protruding hook (223) located at the bottom of the clearance notch (222) and extending to the left. When the upper mold base (20) moves down, the first plane (421) can abut against the top of the clearance notch (222), the first protrusion (223) is inserted into the first groove (423), and the forming pin (40) moves down along the first direction (x1) through the action of the pull hook (22), so that the pin body (41) protrudes outward from the right surface of the side position (30) from the pin moving groove (33).

4. The injection mold for the automobile taillight cover according to claim 3, characterized in that, The seat moving groove (34) is provided with an installation notch (331) on the left side. The installation notch (331) extends upward along the first direction (x1) through the outer surface of the side moving position (30). The installation notch (331) is provided with a detachable limiting plate (332). The left side of the needle moving seat is provided with a limiting groove (424), the bottom of the limiting groove (424) is the first limiting plane (4241), and the top of the limiting groove (424) extends upward through the outer surface of the needle moving seat along the first direction (x1); When the upper mold base (20) closes relative to the lower mold base (10), the distance between the limiting plate (332) and the first limiting plane (4241) is set to form the first width (W1); when the upper mold base (20) opens relative to the lower mold base (10), the first spring (50) acts to move the forming insert (40) upward along the first direction (x1) by a second distance, so that the limiting plate (332) abuts against the first limiting plane (4241).

5. The injection mold for the automobile taillight cover according to claim 3 or 4, characterized in that, The bottom center of the needle moving base is provided with a first mounting hole (425), and the needle body (41) is located at the bottom of the needle moving base and on both sides of the first mounting hole (425); One end of the first spring (50) abuts against the bottom of the first mounting hole (425), and the other end abuts against the bottom of the seat moving groove (34); or, one end of the first spring (50) is connected to the bottom of the first mounting hole (425), and the other end is connected to the bottom of the seat moving groove (34).

6. The injection mold for the automobile taillight cover according to claim 5, characterized in that, The upper mold base (20) is provided with a glue injection port (24) and a runner plate (25); The manifold plate (25) is provided with a manifold channel. One end of the manifold channel is connected to the injection port (24), and the other end is provided with a nozzle (26). The nozzle (26) is connected to the molding chamber.

7. The injection mold for the automobile taillight cover according to claim 6, characterized in that, It also includes an ejector plate (12), which can be moved up and down and installed on the lower mold base (10). The upper surface of the ejector plate (12) is provided with multiple ejector pins (121), and the multiple ejector pins (121) extend upward through the lower mold base (10) and the lower mold core (11) toward the molding cavity; When the ejector plate (12) moves upward, it can drive multiple ejector pins (121) to extend from the upper surface of the lower mold core (11) to eject the car taillight cover from the lower mold core (11); when the ejector plate (12) moves downward, it can drive multiple ejector pins (121) to retract from the upper surface of the lower mold core (11).

8. A method for injection molding a car taillight cover, applied to the injection mold (100) of the car taillight cover according to any one of claims 1-7, characterized in that, Injection molding methods include: S1. Provide an injection mold (100) for a car taillight cover, install the injection mold (100) for the car taillight cover in an injection molding machine, and drive the upper mold base (20) and the ejector plate (12) to move through the ejection mechanism of the injection molding machine. S2. The ejection mechanism drives the upper mold base (20) to move down relative to the lower mold base (10) to close the mold, and moves the side slide (30) together with the upper mold core (21) and the lower mold core (11) to form a molding cavity, and the hook (22) hooks the molding insert (40). S3. The injection molding machine injects the hot melt paste into the injection port (24), and the hot melt paste is injected into the molding chamber through the distribution channel and nozzle (26); S4. The injection molding machine holds the hot melt slurry in the injection mold under pressure and cools it for 30-180 seconds. S5. The ejection mechanism drives the upper mold base (20) to move up a first distance, and the hook (22) moves the forming insert (40) up along the first direction (x1) and disengages; after the hook (22) disengages from the forming insert (40), the first spring (50) drives the forming insert (40) to move up a second distance along the first direction (x1), so that the forming insert (40) and the mounting hole of the car taillight cover are demolded; S6. The ejection mechanism drives the upper mold base (20) to move up a third distance, and the side slide (30) moves away from the lower mold core (11) along the second direction (y1), so that the upper mold core (21) and the side slide (30) are demolded from the car taillight cover. S7. The ejector mechanism drives the ejector plate (12) to move upward, and uses the ejector pin (121) to eject the car taillight cover from the lower mold core (11) upward and unload it; S8, repeat S2-S7 for continuous injection molding of automotive taillight covers.

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