Car knob injection mold

Abstract

This utility model discloses an injection mold for an automotive knob, belonging to the field of injection mold technology. It includes an upper mold and a lower mold, with the upper mold positioned above the lower mold and the two molds matched. A molding groove is formed between the upper and lower molds. An injection nozzle is located at the top of the upper mold and communicates with the molding groove. Two ejector rods are located inside the lower mold, corresponding to the molding groove. Two arc-shaped openings are formed on the lower mold, each containing an air pipe. The tops of both air pipes extend to the upper side of the lower mold, and air nozzle assemblies are fixedly connected to each air pipe. In this design, a drive mechanism controls the two air pipes to rotate within the two arc-shaped openings. The two air pipes are connected to an external air source, and the air nozzle assemblies blow air through them to clean the molding groove on the lower mold. This ensures that the lower molding groove remains clean during demolding after the upper and lower molds are opened, preventing impurities from entering and guaranteeing the quality of the automotive knob injection molding.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to an injection mold for an automotive knob. Background Technology

[0002] As interactive devices on the interior panels of automobiles, rotary knobs are commonly used in various systems such as vehicle entertainment, air conditioning, and navigation, and are responsible for adjusting parameters such as volume, temperature, and fan speed. In today's context of increasingly human-centered and intelligent vehicle design, rotary knobs are required to be easy to operate and identify in order to improve the convenience and safety of the driver in the process of controlling the vehicle.

[0003] Currently, car knobs are usually made of plastic and are generally injection molded. After the car knob is injection molded, the injection mold opens to eject the car knob from the mold groove. However, in most existing injection molds, when the car knob is removed, the mold groove is directly exposed to the air, which makes it easy for impurities to enter the groove and affect the subsequent injection molding of the car knob. Therefore, this utility model proposes an injection mold for car knobs. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide an injection mold for automotive knobs, which aims to solve the problem that when the automotive knob is removed from the injection mold after mold opening, the mold groove is directly exposed to the air, which makes it easy for impurities to enter the groove and affect the subsequent injection molding of the automotive knob.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] An injection mold for an automotive knob includes an upper mold and a lower mold. The upper mold is positioned above the lower mold and the two molds are matched. A molding groove is formed between the upper and lower molds. An injection nozzle is provided at the top of the upper mold and communicates with the molding groove. Two ejector rods are provided inside the lower mold and correspond to the molding groove. Two arc-shaped openings are provided on the lower mold, and air pipes are respectively provided in the two arc-shaped openings. The tops of the two air pipes extend to the upper side of the lower mold. Air nozzle assemblies are fixedly connected to the two air pipes, and the two air nozzle assemblies communicate with the two air pipes and correspond to the molding groove. Two receiving grooves are provided at the bottom of the upper mold and correspond to the two air pipes respectively. A driving mechanism is provided on the lower mold to control the extension and retraction of the two ejector rods and the rotation of the two air pipes.

[0009] In a preferred embodiment of this utility model, the driving mechanism includes a motor, a large driving gear, a small driving gear, two driven small gears, and two driven large gears. The motor is fixedly connected to the bottom end of the lower mold, and the output end of the motor extends movably into the lower mold. The large driving gear and the small driving gear are both fixedly connected to the output end of the motor, and the small driving gear is located above the large driving gear. The two driven small gears are rotatably connected to the bottom wall of the lower mold and mesh with the large driving gear. The two ejector rods are threadedly connected to the two driven small gears respectively. The two driven large gears are rotatably connected to the top wall of the lower mold and mesh with the small driving gears. The two ejector rods extend movably through the two driven large gears respectively.

[0010] As a preferred embodiment of this utility model, the bottom wall of the lower mold is fixedly connected to two anti-rotation rods, and the two ejector rods are slidably connected to the outer surfaces of the two anti-rotation rods respectively.

[0011] As a preferred embodiment of this utility model, a guide rod is fixedly connected to the top of the lower mold, and a guide groove is provided at the bottom of the upper mold, with the guide rod corresponding to the guide groove.

[0012] As a preferred embodiment of this utility model, a water circulation nozzle assembly is fixedly connected to one side of the upper mold, and a water circulation passage is opened inside the upper mold, with the water circulation nozzle assembly and the water circulation passage communicating with each other.

[0013] 3. Beneficial effects

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) In this scheme, the upper mold and the lower mold are closed to perform injection molding of the car knob. After the car knob is injection molded, the upper mold and the lower mold are opened. The drive mechanism controls the extension of two ejector rods to eject the car knob from the mold. At the same time, the drive mechanism controls two air pipes to rotate in two arc-shaped openings respectively. The two air pipes are connected to an external air source and blow air to clean the molding groove on the lower mold through two air nozzle groups. This ensures that the molding groove at the bottom remains clean during the demolding process after the upper mold and the lower mold are opened, preventing impurities from entering and ensuring the effect of the injection molding of the car knob. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a structural diagram of the upper mold in this utility model;

[0019] Figure 4 This is a structural diagram of the lower mold in this utility model;

[0020] Figure 5 This is a structural diagram of the drive mechanism in this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Upper mold; 2. Lower mold; 3. Molding groove; 4. Injection nozzle; 5. Ejector rod; 6. Arc-shaped opening; 7. Air pipe; 8. Air nozzle assembly; 9. Receiving groove; 10. Drive mechanism; 101. Motor; 102. Driving large gear; 103. Driving small gear; 104. Driven small gear; 105. Driven large gear; 11. Anti-rotation rod; 12. Guide rod; 13. Guide groove; 14. Water circulation nozzle assembly; 15. Water circulation passage. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] Please see Figure 1-5An injection mold for an automotive knob includes an upper mold 1 and a lower mold 2. The upper mold 1 is located on the upper side of the lower mold 2 and the upper mold 1 and lower mold 2 are matched. A molding groove 3 is provided between the upper mold 1 and the lower mold 2. An injection nozzle 4 is provided at the top of the upper mold 1 and is connected to the molding groove 3. Two ejector rods 5 are provided in the lower mold 2 and are corresponding to the molding groove 3. Two arc-shaped openings 6 are provided on the lower mold 2. Air pipes 7 are provided in the two arc-shaped openings 6 respectively, and the tops of the two air pipes 7 extend to the upper side of the lower mold 2. Air nozzle assemblies 8 are fixedly connected to the two air pipes 7 and are connected to the two air pipes 7 respectively and are corresponding to the molding groove 3. Two receiving grooves 9 are provided at the bottom of the upper mold 1 and are corresponding to the two air pipes 7 respectively. A drive mechanism 10 is provided on the lower mold 2. The drive mechanism 10 is used to control the extension and retraction of the two ejector rods 5 and the rotation of the two air pipes 7.

[0028] In this embodiment, both the upper mold 1 and the lower mold 2 are mounted on an injection molding machine. When the car knob is injection molded, the upper mold 1 and the lower mold 2 close together to form a complete molding groove 3 inside. The injection molding machine injects the plastic fluid into the molding groove 3 through the injection nozzle 4. After the plastic fluid cools, it is formed in the molding groove 3, completing the injection molding process of the car knob. After the car knob is formed, the upper mold 1 and the lower mold 2 open. The drive mechanism 10 controls the two ejector rods 5 to extend and lift the car knob to demold. At the same time, the two air pipes 7 are connected to an external air source. The two air pipes 7 drive the two air nozzle groups 8 to rotate in the two arc-shaped openings 6 respectively. The two air nozzle groups 8 blow air to clean the molding groove 3 on the lower mold 2, so that the molding groove 3 remains clean during the injection molding of the car knob. When the upper mold 1 and the lower mold 2 are closed to inject the car knob, the two receiving grooves 9 at the bottom of the upper mold 1 correspond to the two air pipes 7 respectively, which can prevent the two air pipes 7 from obstructing the closing of the upper mold 1 and the lower mold 2.

[0029] Specifically, the drive mechanism 10 includes a motor 101, a large driving gear 102, a small driving gear 103, two driven small gears 104, and two driven large gears 105. The motor 101 is fixedly connected to the bottom end of the lower mold 2, and the output end of the motor 101 extends movably into the lower mold 2. The large driving gear 102 and the small driving gear 103 are both fixedly connected to the output end of the motor 101, and the small driving gear 103 is located above the large driving gear 102. The two driven small gears 104 are rotatably connected to the bottom wall of the lower mold 2 and mesh with the large driving gear 102. The two ejector rods 5 are threadedly connected to the two driven small gears 104, and the two driven large gears 105 are rotatably connected to the top wall of the lower mold 2 and mesh with the small driving gear 103. The two ejector rods 5 extend movably through the two driven large gears 105.

[0030] In this embodiment, when the car knob is demolded, the motor 101 controls the rotation of the driving large gear 102 and the driving small gear 103. The driving large gear 102 drives the two driven small gears 104 to rotate, and the driving small gears 103 drive the two driven large gears 105 to rotate. During the rotation of the two driven small gears 104, the two ejector rods 5 extend upward through the two driven large gears 105 respectively. The two ejector rods 95 enter the molding groove 3 and eject the molded car knob from the mold. At the same time, the two driven large gears 105 drive the two air pipes 7 respectively... The two arc-shaped openings 6 rotate, and the two air pipes 7 blow air through the two air nozzle groups 8 to clean the molding groove 3, keeping the molding groove 3 clean. The diameter of the driving large gear 102 is larger than the diameter of the driving small gear 103, and the diameter of the two driven large gears 105 is larger than the diameter of the two driven small gears 104. Therefore, the two ejector rods 5 will quickly eject the car knob from the mold, while the two air pipes 7 move slowly to clean the molding groove 3. After the two ejector rods 5 eject the car knob, they continue to extend, and the two air pipes 7 continue to move to clean the molding groove 3.

[0031] Specifically, the bottom wall of the lower mold 2 is fixedly connected to two anti-rotation rods 11, and the two ejector rods 5 are slidably connected to the outer surfaces of the two anti-rotation rods 11 respectively.

[0032] In this embodiment, the two anti-rotation rods 11 are used to assist the extension and retraction of the two ejector rods 5, so that the movement of the two ejector rods 5 remains stable.

[0033] Specifically, a guide rod 12 is fixedly connected to the top of the lower mold 2, and a guide groove 13 is opened at the bottom of the upper mold 1, with the guide rod 12 corresponding to the guide groove 13.

[0034] In this embodiment, when the upper mold 1 and the lower mold 2 are closing and opening, the guide rod 12 will enter the guide groove 13 to ensure the accuracy and stability of the closing and opening of the upper mold 1 and the lower mold 2.

[0035] Specifically, a water circulation nozzle assembly 14 is fixedly connected to one side of the upper mold 1, and a water circulation passage 15 is opened inside the upper mold 1, with the water circulation nozzle assembly 14 and the water circulation passage 15 communicating with each other.

[0036] In this embodiment, the water circulation passage 15 is located inside the upper mold 1 and communicates with the water circulation nozzle assembly 14. The water circulation nozzle assembly 14 uses the water circulation passage 15 to make the cooling water form a circulation in the upper mold 1, thereby achieving rapid cooling of the automotive knob injection molding and improving work efficiency.

[0037] Working principle: During the injection molding of the car knob, the upper mold 1 and lower mold 2 close to form a complete molding groove 3 inside. The injection molding machine injects molten plastic into the molding groove 3 through the injection nozzle 4. After the molten plastic cools, it is molded in the molding groove 3, completing the injection molding process of the car knob. After the car knob is molded, the upper mold 1 and lower mold 2 open. The motor 101 controls the rotation of the driving large gear 102 and the driving small gear 103. The driving large gear 102 drives the two driven small gears 104 to rotate, and the driving small gears 103 drive the two driven large gears 105 to rotate. During the rotation of the two driven small gears 104, the two driven large gears 105 rotate. Each ejector rod 5 extends upward through two driven gears 105, and the two 95s enter the molding groove 3 to eject the molded car knob and demold it. At the same time, the two driven gears 105 drive the two air pipes 7 to rotate in the two arc-shaped openings 6 respectively. The two air pipes 7 blow air to clean the molding groove 3 on the lower mold 2 through the two air nozzle groups 8, so that the molding groove 3 remains clean during the injection molding of the car knob. When the car knob is injected again, the motor 101 rotates in the opposite direction, so that the two ejector rods 5 and the two air pipes 7 are reset. The two air pipes 7 correspond to the two receiving grooves 9, and the upper mold 1 and the lower mold 2 close to carry out the subsequent injection molding of the car knob.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. An injection mold for an automotive knob, comprising an upper mold (1) and a lower mold (2), characterized in that: The upper mold (1) is located on the upper side of the lower mold (2), and the upper mold (1) and the lower mold (2) are matched. A molding groove (3) is provided between the upper mold (1) and the lower mold (2). An injection nozzle (4) is provided at the top of the upper mold (1), and the injection nozzle (4) is connected to the molding groove (3). Two ejector rods (5) are provided in the lower mold (2), and the two ejector rods (5) are corresponding to the molding groove (3). Two arc-shaped openings (6) are provided on the lower mold (2), and air pipes (7) are provided in the two arc-shaped openings (6). The top ends of the two air pipes (7) extend to the upper side of the lower mold (2). Air nozzle groups (8) are fixedly connected to the two air pipes (7). The two air nozzle groups (8) are respectively connected to the two air pipes (7) and correspond to the forming groove (3). The bottom end of the upper mold (1) is provided with two receiving grooves (9). The two receiving grooves (9) correspond to the two air pipes (7) respectively. The lower mold (2) is provided with a driving mechanism (10). The driving mechanism (10) is used to control the extension and retraction of the two ejector rods (5) and the rotation of the two air pipes (7).

2. The automotive knob injection mold according to claim 1, characterized in that: The drive mechanism (10) includes a motor (101), a large driving gear (102), a small driving gear (103), two driven small gears (104), and two driven large gears (105). The motor (101) is fixedly connected to the bottom end of the lower mold (2), and the output end of the motor (101) extends movably into the lower mold (2). The large driving gear (102) and the small driving gear (103) are both fixedly connected to the output end of the motor (101), and the small driving gear (104) extends movably into the lower mold (2). 103) Located on the upper side of the driving large gear (102), the two driven small gears (104) are rotatably connected to the bottom wall of the lower mold (2) and mesh with the driving large gear (102), and the two ejector rods (5) are threadedly connected to the two driven small gears (104), and the two driven large gears (105) are rotatably connected to the top wall of the lower mold (2) and mesh with the driving small gear (103), and the two ejector rods (5) move through the two driven large gears (105).

3. The automotive knob injection mold according to claim 2, characterized in that: The bottom wall of the lower mold (2) is fixedly connected to two anti-rotation rods (11), and the two ejector rods (5) are slidably connected to the outer surfaces of the two anti-rotation rods (11).

4. The automotive knob injection mold according to claim 3, characterized in that: The top of the lower mold (2) is fixedly connected to a guide rod (12), and the bottom of the upper mold (1) is provided with a guide groove (13), and the guide rod (12) corresponds to the guide groove (13).

5. The automotive knob injection mold according to claim 4, characterized in that: A water circulation nozzle assembly (14) is fixedly connected to one side of the upper mold (1), and a water circulation passage (15) is opened inside the upper mold (1), and the water circulation nozzle assembly (14) and the water circulation passage (15) are connected.

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