Office gear injection mold

Abstract

The utility model discloses an office gear injection mold, include: bottom fixed support, lower mould, lower mould installs at the top of bottom fixed support, the beneficial effect of the utility model is: through being equipped with damper and spring in the groove of lower mould bottom, damper bottom end is connected with inner slide needle plate, and the both ends of spring are connected groove and inner slide needle plate respectively, can effectively buffer the impact force of ejector pin in the ejecting process, can avoid the damage of ejector pin and other parts of mould because of violent impact, reduce mould maintenance frequency, prolong the overall service life of mould, through being provided with guide rod, guide cylinder and ensure that the direction is accurate when upper mould and lower mould open and close, and the cooperation of guide structure makes the movement path of each part of mould accurate, reduces the injection defect caused by movement deviation, and the precision and quality of injection product are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an office gear injection mold. Background Technology

[0002] In the office supplies manufacturing industry, office gears are key components for transmission and motion control in many office devices. Their quality and performance directly affect the operational stability and service life of these devices. As office equipment develops towards miniaturization, precision, and efficiency, more stringent requirements are placed on the performance indicators of office gears, such as precision, strength, and wear resistance. Injection molding, as an efficient and precise plastic molding process, has been widely used in office gear manufacturing due to its advantages such as high production efficiency, low cost, and ability to mold complex shapes. However, the ejection and reset mechanisms of existing office gear injection molds are not designed reasonably enough. During the reset process, it is difficult to ensure that each component accurately returns to its initial position, which may interfere with subsequent injection molding work, leading to instability in the injection molding process and further affecting product quality. Utility Model Content

[0003] The purpose of this utility model is to provide an office gear injection mold to solve the problem mentioned in the background art that the ejection and reset mechanism design of the existing office gear injection mold is not reasonable enough. During the reset process, it is difficult to ensure that each component returns to its initial position accurately, which may interfere with subsequent injection work, resulting in instability in the injection process and further affecting product quality.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for office gears, comprising:

[0005] Bottom fixed support;

[0006] The lower mold is installed on top of the bottom fixed support;

[0007] The upper mold is placed above the lower mold, and both the lower mold and the upper mold have injection cavities inside.

[0008] An inner sliding needle plate is slidably disposed inside the bottom fixed support. Multiple ejector pins that cooperate with the injection cavity are installed on the top of the inner sliding needle plate, and the ejector pins are slidably connected to the lower mold.

[0009] Side fixed support plates are symmetrically installed on the outside of the upper mold, and two bottom fixed support strips are symmetrically fixed to the bottom of the side fixed support plates.

[0010] An outer fixing frame is slidably disposed on the outside of the bottom fixing support bar, and the outer fixing frame is installed with the lower mold by bolts;

[0011] A connecting plate is symmetrically arranged on the outer side of the inner sliding needle plate. The connecting plate is slidably connected to the bottom fixed support. A side sliding frame is fixedly connected to the outer side of the connecting plate. The bottom fixed support is slidably connected to the side sliding frame. The inner side of the side sliding frame is slidably connected to the outer side of the bottom fixed support. A bottom pull plate that cooperates with the side sliding frame is fixedly connected to the bottom of the bottom fixed support. A side fixed support block is fixedly connected to the outer side of the bottom fixed support.

[0012] As a preferred embodiment of this utility model: the bottom of the lower mold is symmetrically provided with multiple mounting slots, and a damper is installed inside each of the multiple mounting slots. The bottom end of the damper is connected to the inner sliding needle plate, and a spring is sleeved on the outside of the damper. One end of the spring is connected to the mounting slot, and the other end of the spring is connected to the inner sliding needle plate.

[0013] As a preferred embodiment of this utility model: the inner sliding needle plate is provided with a plurality of limiting rods, the limiting rods are fixedly connected to the lower mold, and the limiting rods are fixedly connected to the bottom fixed support.

[0014] As a preferred embodiment of this utility model, the bottom of the outer fixing frame is symmetrically provided with bottom limiting grooves that cooperate with the side fixing blocks.

[0015] As a preferred embodiment of this utility model: four guide rods are symmetrically arranged inside the lower mold, and four guide cylinders that cooperate with the guide rods are symmetrically fixed inside the upper mold.

[0016] As a preferred embodiment of this utility model: an injection tube is installed on the top of the upper mold, a top fixing frame is installed on the top of the upper mold, and side grooves are symmetrically opened on the outer side of the bottom fixing support.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: By installing a damper and a spring in the mounting groove at the bottom of the lower mold, with the bottom end of the damper connected to the inner sliding pin plate and both ends of the spring connected to the mounting groove and the inner sliding pin plate respectively, the impact force of the ejector pin during the ejection process can be effectively buffered, preventing damage to the ejector pin and other parts of the mold due to violent collisions, reducing the frequency of mold maintenance, and extending the overall service life of the mold; by setting guide rods and guide cylinders, the opening and closing direction of the upper and lower molds is ensured to be accurate, and the coordinated action of the guide structure makes the movement path of each part of the mold precise, reducing the impact of movement deviation. This significantly improves the precision and quality of injection molded products by eliminating injection molding defects caused by poor quality control. The system incorporates a bottom fixed support, side fixed blocks, an outer fixed frame, a bottom limiting groove, and a bottom pull plate. The bottom fixed support drives the bottom pull plate upwards, which in turn pushes the side sliding frame, connecting plate, and inner sliding pin plate upwards, facilitating the ejection of each ejector pin. When the bottom fixed support, side fixed blocks, and bottom pull plate move downwards, the side fixed blocks press against the top of the side sliding frame, ensuring that the side sliding frame, connecting plate, inner sliding pin plate, and each ejector pin are reset, thus preventing any impact on the injection molding process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the ejector pin structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the outer fixing frame of this utility model;

[0021] Figure 4 This is a schematic diagram of the lower mold structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the connecting plate and side sliding frame structure of this utility model.

[0023] In the diagram: 1. Bottom fixed support; 2. Lower mold; 3. Upper mold; 4. Top fixed frame; 5. Injection tube; 6. Side fixed support plate; 7. Bottom fixed support strip; 8. Outer fixed frame; 9. Side sliding frame; 10. Side fixed support block; 11. Bottom limiting groove; 12. Bottom pull plate; 13. Side groove; 14. Inner sliding pin plate; 15. Limiting rod; 16. Ejector pin; 17. Damper; 18. Spring; 19. Guide rod; 20. Guide cylinder; 21. Connecting plate; 22. Mounting groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 5 This utility model provides a technical solution: an injection mold for office gears, comprising: a bottom fixed support 1; a lower mold 2 installed on the top of the bottom fixed support 1 by bolts; an upper mold 3 placed above the lower mold 2, both the lower mold 2 and the upper mold 3 having injection cavities inside; an inner sliding pin plate 14 slidably disposed on the inner side of the bottom fixed support 1, the top of the inner sliding pin plate 14 being equipped with multiple ejector pins 16 that cooperate with the injection cavities, the ejector pins 16 being slidably connected to the lower mold 2; and a side fixed support plate 6 symmetrically installed on the outer side of the upper mold 3 by bolts, the bottom of the side fixed support plate 6 being symmetrically fixed with two... Bottom fixed support 7; outer fixed frame 8 is slidably set on the outside of bottom fixed support 7, and the outer fixed frame 8 is installed with the lower mold 2 by bolts; connecting plate 21 is symmetrically fixed on the outside of inner sliding needle plate 14, connecting plate 21 is slidably connected to bottom fixed support 1, side sliding frame 9 is fixed on the outside of connecting plate 21, bottom fixed support 7 is slidably connected to side sliding frame 9, the inside of side sliding frame 9 is slidably connected to the outside of bottom fixed support 1, bottom fixed support 7 is fixedly connected to bottom pull plate 12 that cooperates with side sliding frame 9, and side fixed support block 10 is fixedly connected to the outside of bottom fixed support 7.

[0026] It should be noted that in this embodiment, the lower mold 2 is bolted to the top of the bottom fixed support 1, and the upper mold 3 is placed above the lower mold 2. At this time, the injection cavities inside the upper mold 3 and the lower mold 2 form a complete injection space. The injection pipe 5 installed on the top of the upper mold 3 is connected to an external molten plastic raw material supply device. The raw material supply is controlled by an external controller, and the molten plastic raw material is accurately injected into the injection cavities of the upper mold 3 and the lower mold 2, preparing for the injection molding process and waiting for the subsequent mold closing operation command. The external drive device drives the upper mold 3 to move downward to close with the lower mold 2. During this process, the four guide rods 19 symmetrically arranged inside the lower mold 2 cooperate with the four guide cylinders 20 symmetrically fixed inside the upper mold 3 to ensure that the upper mold 3 is oriented accurately during the mold closing process. To avoid misalignment and collisions, and to ensure the precise movement path of each component of the mold, laying the foundation for high-quality injection molding, the molten plastic material cools and solidifies in the injection cavity, gradually forming the shape of the working gear. During this period, the inner sliding pin plate 14 is in its initial position, and the multiple ejector pins 16 mounted on its top are slidably connected to the lower mold 2, but do not act on the plastic material in the injection cavity. The multiple limiting rods 15 slidably set inside the inner sliding pin plate 14 are fixedly connected to the lower mold 2 and the bottom fixed support 1, providing precise guidance for the inner sliding pin plate 14, ensuring that it can only move within the limited track during subsequent ejection and reset operations. After the working gear cools and solidifies in the injection cavity, an ejection operation is required. The two bottom fixed supports symmetrically fixed to the bottom of the side fixed support plate 6... Under the action of the relevant driving device, the support bar 7 moves upward, driving the bottom pull plate 12 to move upward. The bottom pull plate 12 generates an upward pushing force on the side sliding frame 9, the connecting plate 21, and the inner sliding pin plate 14, causing the inner sliding pin plate 14 to slide upward along the limit rod 15, thereby driving the ejector pin 16 to move upward and eject the molded office gear from the injection cavity. During this process, the bottom end of the damper 17 is connected to the inner sliding pin plate 14, and the two ends of the spring 18 are respectively connected to the mounting groove 22 and the inner sliding pin plate 14. When the ejector pin 16 ejects the injection molded part, the damper and the spring can absorb and disperse the impact force generated by the ejector pin 16, converting it into elastic potential energy, and preventing the ejector pin 16 from colliding violently with the mold and the injection molded office gear. After the ejection operation is completed, the bottom... The fixed support 7, side fixed support block 10, and bottom pull plate 12 move downward under the action of the driving device. The side fixed support block 10 presses the top of the side sliding frame 9, causing the side sliding frame 9, connecting plate 21, inner sliding pin plate 14, and each ejector pin 16 to move downward along the limit rod 15 to complete the reset operation. This ensures accurate reset and avoids affecting subsequent injection molding operations. Afterward, the mold can be closed and injected again, repeating the injection molding production of office gears. During the ejection process, although the ejector pin 16 needs to contact the injection-molded office gear and eject it, the damper 17 and spring 18 installed in the mounting groove 22 at the bottom of the lower mold 2 play a crucial buffering role. When the ejector pin 16 ejects the office gear upward, a certain impact force is generated.The damper and spring absorb and disperse this impact force, converting it into elastic potential energy. This prevents the ejector pin 16 from colliding violently with the office gear, thus protecting the molded office gear from damage.

[0027] In one embodiment, such as Figures 1 to 5 As shown, the bottom of the lower mold 2 is symmetrically provided with multiple mounting slots 22. Each mounting slot 22 is equipped with a damper 17. The bottom end of the damper 17 is connected to the inner sliding needle plate 14. A spring 18 is sleeved on the outside of the damper 17. One end of the spring 18 is connected to the mounting slot 22, and the other end of the spring 18 is connected to the inner sliding needle plate 14.

[0028] It should be noted that, in this embodiment, during the process of ejecting the injection molded part by the ejector pin 16, the damper and spring can absorb and disperse the impact force generated by the ejector pin 16, convert it into elastic potential energy, avoid violent collision between the ejector pin 16 and the mold and the injection molded office gear part, protect the molded office gear part from damage, extend the service life of the ejector pin 16, and reduce production costs.

[0029] In one embodiment, such as Figures 1 to 5 As shown, the inner sliding needle plate 14 has multiple limiting rods 15 slidably arranged inside. The limiting rods 15 are fixedly connected to the lower mold 2 and the bottom fixed support 1.

[0030] It should be noted that in this embodiment, when the inner sliding needle plate 14 slides up and down to drive the ejector pin 16 to perform ejection and reset operations, the limiting rod 15 can provide precise guidance for the inner sliding needle plate 14, restricting it to move only within a limited track.

[0031] In one embodiment, such as Figures 1 to 5 As shown, the bottom of the outer fixing frame 8 is symmetrically provided with bottom limiting grooves 11 that cooperate with the side fixing blocks 10.

[0032] It should be noted that in this embodiment, displacement of the bottom fixed support 7 and the bottom pull plate 12 can be effectively prevented, thereby enhancing the stability and reliability of the overall mold structure.

[0033] In one embodiment, such as Figures 1 to 5 As shown, four guide rods 19 are symmetrically arranged inside the lower mold 2, and four guide cylinders 20 that cooperate with the guide rods 19 are symmetrically fixed inside the upper mold 3.

[0034] It should be noted that in this embodiment, the guide structure can ensure that the upper mold 3 is accurately aligned with the lower mold 2 after the mold is closed, avoiding misalignment and collision between the upper mold 3 and the lower mold 2, reducing injection molding defects such as flash and burrs caused by inaccurate mold opening and closing, and improving the product qualification rate.

[0035] In one embodiment, such as Figures 1 to 5 As shown, an injection tube 5 is installed on the top of the upper mold 3, and a top fixing bracket 4 is installed on the top of the upper mold 3 by bolts. Side grooves 13 are symmetrically opened on the outer side of the bottom fixing support 1.

[0036] It should be noted that, in this embodiment, an injection tube 5 is installed on the top of the upper mold 3, which facilitates the accurate injection of molten plastic raw material into the injection cavities of the upper mold 3 and the lower mold 2, ensuring the stability and continuity of the injection molding process.

[0037] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first," "second," "third," and "fourth" 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," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold for office gears, characterized in that, include: Bottom fixed support (1); The lower mold (2) is installed on the top of the bottom fixed support (1); The upper mold (3) is placed above the lower mold (2), and both the lower mold (2) and the upper mold (3) have injection cavities inside. An inner sliding needle plate (14) is slidably disposed on the inner side of the bottom fixed support (1). A plurality of ejector pins (16) that cooperate with the injection cavity are installed on the top of the inner sliding needle plate (14). The ejector pins (16) are slidably connected to the lower mold (2). Side fixed support plate (6) is symmetrically installed on the outside of the upper mold (3), and two bottom fixed support strips (7) are symmetrically fixed to the bottom of the side fixed support plate (6); The outer fixing frame (8) is slidably disposed on the outside of the bottom fixing support (7), and the outer fixing frame (8) is installed with the lower mold (2) by bolts; A connecting plate (21) is symmetrically arranged on the outside of the inner sliding needle plate (14). The connecting plate (21) is slidably connected to the bottom fixed support (1). A side sliding frame (9) is fixedly connected to the outside of the connecting plate (21). The bottom fixed support (7) is slidably connected to the side sliding frame (9). The inner side of the side sliding frame (9) is slidably connected to the outer side of the bottom fixed support (1). A bottom pull plate (12) that cooperates with the side sliding frame (9) is fixedly connected to the bottom of the bottom fixed support (7). A side fixed support block (10) is fixedly connected to the outer side of the bottom fixed support (7).

2. The office gear injection mold according to claim 1, characterized in that: The bottom of the lower mold (2) is symmetrically provided with multiple mounting slots (22), and each of the mounting slots (22) is equipped with a damper (17). The bottom end of the damper (17) is connected to the inner sliding needle plate (14), and a spring (18) is sleeved on the outside of the damper (17). One end of the spring (18) is connected to the mounting slot (22), and the other end of the spring (18) is connected to the inner sliding needle plate (14).

3. The office gear injection mold according to claim 1, characterized in that: The inner sliding needle plate (14) is provided with multiple limiting rods (15) which are fixedly connected to the lower mold (2) and the bottom fixed support (1).

4. The office gear injection mold according to claim 1, characterized in that: The bottom of the outer fixing frame (8) is symmetrically provided with bottom limiting grooves (11) that cooperate with the side fixing blocks (10).

5. The office gear injection mold according to claim 1, characterized in that: The lower mold (2) is symmetrically provided with four guide rods (19) inside, and the upper mold (3) is symmetrically fixed with four guide cylinders (20) that cooperate with the guide rods (19).

6. The office gear injection mold according to claim 1, characterized in that: The top of the upper mold (3) is equipped with an injection tube (5), the top of the upper mold (3) is equipped with a top fixing bracket (4), and the outer side of the bottom fixing support (1) is symmetrically provided with side grooves (13).

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