Gas-assisted flexible graded demolding mechanism for light guide strip of car lamp
Through the servo motor driving the dislocation movement of the tooth plate and the telescopic mechanism, combined with the air pressure, the problem of the difficult demolding of the side wall of the light guide strip is solved, and a more efficient demolding process is achieved, which improves production efficiency and safety.
Patent Information
- Application Number
- CN202421096301.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing light guide bar gas-assisted flexible grading demolding mechanism of the existing car lights is difficult to quickly release the mold, especially the demolding efficiency of the side wall is low, which affects the production efficiency.
A mold release mechanism including lower mold, main mold core and secondary mold core is designed. The tooth plate and telescopic mechanism are driven by the servo motor. The dislocation movement of the main mold core and secondary mold core is achieved in conjunction with the air pressure to realize the light guide of the light. The side wall of the strip is demolded to improve the demolding efficiency.
It effectively improves the demolding efficiency of the side walls of the light guide strip, reduces the force demand during the demolding process, improves production efficiency, and ensures the safety of the light guide strip during the demolding process.
Smart Images
Figure CN222290876U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of processing light guide strips for vehicle lamps, in particular to a gas-assisted flexible graded demoulding mechanism for light guide strips for vehicle lamps. Background Art
[0002] The light guide strip of a car headlight is a light-guiding structure made of a high-refractive index material. It is used to guide light from a light source to the location that needs to be illuminated. The light guide strip of a car headlight can be installed in the car headlight to form a bright outline, which has a decorative effect. The light guide strip of a car headlight is usually made using a gas-assisted injection molding process.
[0003] The specific process of gas-assisted molding is to aim at the inside of the molten material through the air nozzle and blow nitrogen into the mold during the process of injecting the molten material into the mold, so as to form a cavity inside the headlight light guide strip, so that the molten material can better fit the inner wall of the mold cavity and form a headlight light guide strip. In the demolding process, the headlight light guide strip in the cavity is pushed out with the help of air pressure thrust to achieve demolding. After searching, the demolding method of the patent named "LED headlight light guide strip gas-assisted flexible graded demolding mechanism" with the publication number of CN106827420B in China is disclosed. In the elastic pushing structure and gas-assisted Under the sequential action of the flexible ejection structure, the teeth of the light guide bar have been disengaged from the movable mold assembly. Therefore, the ejection structure only needs to use a small force to act on the assembly position of the light guide bar to realize the light guide bar being ejected from the mold. However, the structure of the gas-assisted graded demolding mechanism of the car light guide bar is mainly for demolding the light guide teeth at the bottom of the car light guide bar. Compared with the contact area between the light guide teeth and the mold, the contact area between the side wall of the car light guide bar and the inner wall of the mold cavity is larger. The above-mentioned demolding structure is difficult to demold the side wall of the car light guide bar, which is not conducive to rapid demolding. Utility Model Content
[0004] Based on this, it is necessary to provide a gas-assisted flexible graded demolding mechanism for the light guide strip of a vehicle headlight in order to address the problem that the demolding mechanism has difficulty in demolding the side wall of the light guide strip of a vehicle headlight during the existing demolding process.
[0005] A gas-assisted flexible graded demolding mechanism for a headlight light guide strip comprises a lower mold, a template is arranged on the top of the lower mold, a main mold core that can be raised or lowered is arranged inside the template, a secondary mold core that can be raised or lowered is arranged inside the main mold core, a cavity for the headlight light guide strip is formed between the main mold core and the secondary mold core, a tooth plate is arranged on the side wall of the main mold core, a slide rail is arranged on one side of the tooth plate, a transmission gear is arranged on the slide rail, a telescopic mechanism is arranged on the bottom of the secondary mold core, a fixed block is fixed on the top of the lower mold, a push rod is arranged on the top of the fixed block, an exhaust hole is opened on the outer wall of the top end of the push rod, an air intake pipe is arranged on one side of the bottom end of the push rod, and the air intake pipe extends to the outside of the template.
[0006] In one embodiment, the top of the template is provided with an injection port at one end of the main mold core, and an exhaust port at the other end of the main mold core.
[0007] In one of the embodiments, a telescopic column is disposed at the bottom end of the tooth plate, a spring is sleeved on the outside of the telescopic column, and the bottom end of the telescopic column is fixed to the top of the lower mold.
[0008] In one of the embodiments, a servo motor is provided on a side of the side wall of the slide rail opposite to the transmission tooth, and an output shaft of the servo motor is fixedly connected to the transmission tooth.
[0009] In one of the embodiments, a mounting groove is provided at the bottom of the secondary mold core, and both the main mold core and the secondary mold core can move in the mounting groove. A guide column is also fixed to the top of the lower mold, and the extending end of the guide column extends into the mounting groove and is fixedly connected to the bottom of the secondary mold core.
[0010] In one of the embodiments, a sealing strip is fixed to the top edge of the lower mold.
[0011] When the utility model is in use, the main mold core and the auxiliary mold core are arranged, and both the main mold core and the auxiliary mold core can be lifted and lowered. The main mold core and the auxiliary mold core descend by different distances, and the inner wall of the main mold core and the top surface of the auxiliary mold core are misaligned. During the descending movement of the main mold core and the auxiliary mold core, the side wall of the headlight light guide strip tends to be misaligned with the side wall of the main mold core, which is conducive to separating the headlight light guide strip from the main mold core, improving the demoulding efficiency of the headlight light guide strip, and thus helping to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional diagram of the present utility model.
[0013] Figure 2 It is an exploded view of the utility model.
[0014] Figure 3 It is a three-dimensional diagram of the top rod of the utility model.
[0015] Figure 4 It is a cross-sectional view of the template of the utility model.
[0016] Figure 5 It is a structural schematic diagram of the main mold core and the auxiliary mold core of the utility model.
[0017] Figure 6 It is a three-dimensional diagram of the driving mechanism of the utility model.
[0018] Figure 7 It is a top view of the driving mechanism of the utility model.
[0019] Figure 8 It is a top view of the template of the utility model.
[0020] In the figure: 1. slide rail; 2. servo motor; 3. transmission gear; 31. tooth plate; 4. spring; 5. telescopic column; 6. telescopic mechanism; 7. mounting slot; 8. guide column; 9. fixing block; 10. air inlet pipe; 11. slot body; 12. plug column; 13. exhaust hole; 14. ejector rod; 15. main mold core; 16. auxiliary mold core; 17. upper mold; 18. template; 19. lower mold; 20. base; 21. injection head; 22. positioning pin; 23. sealing strip; 24. injection port; 25. exhaust port. DETAILED DESCRIPTION
[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0022] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0023] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0024] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0025] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0026] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0027] The technical solution provided by the embodiments of the present application is described below in conjunction with the accompanying drawings.
[0028] like Figure 1 and Figure 8As shown, the present application provides a gas-assisted flexible graded demoulding mechanism for a headlight light guide strip, comprising a lower mold 19, a template 18 is arranged on the top of the lower mold 19, a main mold core 15 that can be lifted and lowered is arranged inside the template 18, a sub-mold core 16 that can be lifted and lowered is arranged inside the main mold core 15, a cavity of the headlight light guide strip is formed between the main mold core 15 and the sub-mold core 16, a tooth plate 31 is arranged on the side wall of the main mold core 15, and a slide rail 1 is arranged on one side of the tooth plate 31, a transmission tooth 3 is arranged on the slide rail 1, a servo motor 2 is arranged on the side wall of the slide rail 1 relative to the transmission tooth 3, and the servo motor 2 The output shaft is fixedly connected to the transmission gear 3, a telescopic mechanism 6 is arranged at the bottom of the auxiliary mold core 16, a groove body 11 is provided at the top of the lower mold 19, a fixed block 9 is fixed in the groove body 11, a push rod 14 is arranged on the top of the fixed block 9, an exhaust hole 13 is arranged on the top outer wall of the push rod 14, an air inlet pipe 10 is arranged on one side of the bottom end of the push rod 14, the air inlet pipe 10 extends to the outside of the template 18, the push rod 14 is a hollow structure, and air passes through the push rod 14 and is discharged from the exhaust hole 13; the slide rail 1, the servo motor 2, the transmission gear 3, the tooth plate 31, the spring 4 and the telescopic column 5 constitute a driving mechanism.
[0029] Specifically, an injection head 21 is installed on one side of the injection port 24. The injection head 21 has two injection channels, one injection channel injects raw materials, and the other injection channel injects air. Through the gas-assisted molding technology, a hollow cavity is formed inside the molded headlight light guide strip. A stainless steel base 20 is fixed at the bottom of the lower mold 19. When in use, the base 20 is fixed on the injection molding machine, and the lower mold 19 is pushed to move by the driving mechanism of the injection molding machine. An upper mold 17 is also provided on one side of the lower mold 19. The bottom of the upper mold 17 is provided with a groove that is the same as the cavity between the main mold core 15 and the auxiliary mold core 16. After the upper mold 17 and the lower mold 19 are fitted together, the raw material is injected into the cavity and the groove at the bottom of the upper mold 17 to form a light guide strip for the car lamp; plug posts 12 are provided at the four corners of the top of the lower mold 19, and a plug hole corresponding to the plug post 12 is provided at the bottom of the template 18. Positioning pins 22 are fixed at the four corners of the bottom of the upper mold 17, and a pin hole corresponding to the positioning pin 22 is also provided at the top of the template 18. During the fitting process of the upper mold 17 and the lower mold 19, the positioning pin 22 is inserted into the pin hole, thereby stabilizing the upper mold 17 and the lower mold 19 to ensure that there is no relative displacement between the upper mold 17 and the lower mold 19;
[0030] Air is injected between the uncooled light guide strips for the headlights, and the air blows the solid light guide strips for the headlights into a hollow structure. Under the action of air pressure, the outer wall of the light guide strip for the headlights fits tightly against the main mold core 15 and the auxiliary mold core 16, as well as the inner wall of the groove, thereby forming the required light guide strip for the headlights. The light guide strip for the headlights made by gas-assisted molding has a smoother appearance without any dents or potholes. The gas-assisted molding technology is a prior art and will not be described in detail here. When the main mold core 15 moves downward, it is a primary demolding structure. When the auxiliary mold core 16 moves downward and cooperates with the ejector pin 14 to push the light guide strip for the headlights upward, it is a secondary demolding structure. Gas is transported through the ejector pin 14, and the light guide strip for the headlights is pushed upward by air pressure, which is a three-stage demolding structure. The third-stage demolding structure is a flexible demolding structure and does not damage the light guide strip for the headlights.
[0031] Furthermore, an injection port 24 is provided at one end of the main mold core 15 at the top of the template 18 , and an exhaust port 25 is provided at the other end of the main mold core 15 . Specifically, the gas injected into the light guide strip of the headlight is eventually discharged from the exhaust port 25 .
[0032] Furthermore, a telescopic column 5 is provided at the bottom end of the tooth plate 31, and a spring 4 is provided on the outside of the telescopic column 5. The bottom end of the telescopic column 5 is fixed to the top of the lower mold 19. Specifically, the telescopic column 5 and the telescopic column 5 form a reset mechanism. After demolding is completed, the main mold core 15 moves upward, and the reset mechanism has an upward pushing effect, which is conducive to the upward reset of the main mold core 15.
[0033] Furthermore, a mounting groove 7 is provided at the bottom of the auxiliary mold core 16, and both the main mold core 15 and the auxiliary mold core 16 can move in the mounting groove 7. A guide column 8 is also fixed to the top of the lower mold 19, and the extending end of the guide column 8 extends into the mounting groove 7 and is fixedly connected to the bottom of the auxiliary mold core 16. Specifically, the slide rail 1, the servo motor 2, the transmission gear 3, the spring 4 and the telescopic column 5 are all located in the mounting groove 7.
[0034] Furthermore, a sealing strip 23 is fixed to the top edge of the lower mold 19. Specifically, during the injection molding process of the headlight light guide strip, the upper mold 17 and the lower mold 19 are close to each other, and the sealing strip 23 is located between the upper mold 17 and the lower mold 19. The upper mold 17 and the lower mold 19 press the sealing strip 23 tightly, thereby ensuring good sealing between the upper mold 17 and the lower mold 19, and preventing air leakage. This is beneficial to maintaining pressure between the upper mold 17 and the lower mold 19, and is beneficial to the injection molding of the headlight light guide strip.
[0035] The working principle of the utility model is:
[0036] When in use, the injection agent presses the raw material into the injection head 21, and the raw material is injected into the cavity and the groove at the bottom of the upper mold 17 through the injection port 24, and then the headlight light guide strip is formed. During the demolding process, the servo motor 2 is started, and the output shaft of the servo motor 2 rotates clockwise and drives the transmission gear 3 to rotate, and the transmission gear 3 drives the tooth plate 31, and the tooth plate 31 moves downward, thereby driving the main mold core 15, and the main mold core 15 and the auxiliary mold core 16 are relatively displaced, and the outer wall of the headlight light guide strip is separated from the inner wall of the main mold core 15, and then the demolding is started again. The telescopic mechanism 6 is moved, and the telescopic mechanism 6 pulls the secondary mold core 16 to move downward. During this process, the push rod 14 pushes the bottom of the headlight light guide strip upward, and a space is formed between the headlight light guide strip and the secondary mold core 16. The exhaust hole 13 on the outer wall of the top end of the push rod 14 is just located in the space. Gas is filled into the air inlet pipe 10 through an external air pump, and the gas eventually enters the space. The air pressure in the space increases, thereby pushing the headlight light guide strip upward. During this process, the headlight light guide strip is pushed out by the air pressure without being damaged, and demolding is safer.
[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0038] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A gas-assisted flexible graded demoulding mechanism for a vehicle lamp light guide strip, comprising a lower mold (19), characterized in that: The top of the lower mold (19) is provided with a mold plate (18), the interior of the mold plate (18) is provided with a main mold core (15) that can be raised and lowered, the interior of the main mold core (15) is provided with a secondary mold core (16) that can be raised and lowered, a cavity of the light guide strip of the vehicle lamp is formed between the main mold core (15) and the secondary mold core (16), a tooth plate (31) is provided on the side wall of the main mold core (15), and a slide rail (1) is provided on one side of the tooth plate (31), the slide rail (1) is provided with a transmission gear (3), the bottom of the auxiliary mold core (16) is provided with a telescopic mechanism (6), the top of the lower mold (19) is fixed with a fixed block (9), the top of the fixed block (9) is provided with a push rod (14), the top outer wall of the push rod (14) is provided with an exhaust hole (13), and the bottom side of the push rod (14) is provided with an air inlet pipe (10), and the air inlet pipe (10) extends to the outside of the template (18).
2. The gas-assisted flexible graded demoulding mechanism for a vehicle lamp light guide strip according to claim 1, characterized in that: The top of the template (18) is provided with an injection port (24) at one end of the main mold core (15), and an exhaust port (25) is provided at the other end of the main mold core (15).
3. The gas-assisted flexible graded demoulding mechanism for a vehicle lamp light guide strip according to claim 1, characterized in that: A telescopic column (5) is provided at the bottom end of the tooth plate (31), a spring (4) is sleeved on the outside of the telescopic column (5), and the bottom end of the telescopic column (5) is fixed to the top of the lower mold (19).
4. The gas-assisted flexible graded demoulding mechanism for a vehicle lamp light guide strip according to claim 1, characterized in that: A servo motor (2) is provided on a side of the side wall of the slide rail (1) opposite to the transmission tooth (3), and an output shaft of the servo motor (2) is fixedly connected to the transmission tooth (3).
5. The gas-assisted flexible graded demoulding mechanism for a vehicle lamp light guide strip according to claim 1, characterized in that: The bottom of the secondary mold core (16) is provided with a mounting groove (7), and the main mold core (15) and the secondary mold core (16) can both move in the mounting groove (7). A guide column (8) is also fixed on the top of the lower mold (19), and the extended end of the guide column (8) extends into the mounting groove (7) and is fixedly connected to the bottom of the secondary mold core (16).
6. The gas-assisted flexible graded demoulding mechanism for a vehicle lamp light guide strip according to claim 1, characterized in that: A sealing strip (23) is fixed to the top edge of the lower mold (19).