Needle drawing mechanism of injection mold

Abstract

The utility model discloses an injection mold needle drawing mechanism, which comprises a mold base and a support frame, the mold base is fixed on the top of the support frame through two symmetrically arranged vertical plates, the top of the support frame is fixedly connected with a plurality of strip-shaped frames, two sides of the plurality of strip-shaped frames are provided with sliding ports, the sliding ports are internally and fixedly connected with sliding rods, and the sliding rods are fixedly connected with the support frame. A traction plate is slidably connected between the two sliding rods in a sleeving mode, the top end of the traction plate is fixedly connected with a mounting rod, the mounting rod penetrates through the mold base and is fixedly connected with an insert pin, the sliding rods are sleeved with first springs, and the two ends of the first springs are fixedly connected with the traction plate and the inner wall of the sliding opening correspondingly; a motor is fixedly connected to the outer wall of one side of the supporting frame, the insert pin body can be conveniently pulled out through a mechanical linkage structure of a single motor, multiple sets of driving pieces do not need to be arranged, the manufacturing cost is reduced, and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold-related products, specifically a needle extraction mechanism for injection molds. Background Technology

[0002] Currently, when processing injection-molded handles on the market, the screw hole positions are processed by using a sliding seat to injection mold the handle, and then extending the insert pin into the screw hole position of the product. Sometimes, it is necessary to set two or more screw holes, so two or more sets of insert pins are used.

[0003] Currently, when removing multiple sets of insert pins, two or more sets of hydraulic cylinders are needed to sequentially pull the insert pins out of the screw holes, which is inconvenient to operate, and the use of multiple sets of hydraulic cylinders also increases the manufacturing cost of the device. Utility Model Content

[0004] The purpose of this invention is to provide a needle extraction mechanism for injection molds to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a needle-pulling mechanism for injection molds, comprising a mold base and a support frame. The mold base is fixed to the top of the support frame by two symmetrically arranged upright plates. Multiple strip frames are fixedly connected to the top of the support frame. Each strip frame has a sliding opening on both sides. A sliding rod is fixedly connected within each sliding opening. A traction plate is slidably sleeved between two sliding rods. An installation rod is fixedly connected to the top of the traction plate. The installation rod passes through the mold base and is fixedly connected to a pin. A first spring is sleeved on the sliding rod, and both ends of the first spring are respectively connected to the traction plate. The plate and the inner wall of the sliding groove are fixedly connected. A motor is fixedly connected to one outer wall of the support frame. The output shaft of the motor passes through the support frame and is fixedly connected to a threaded rod. The threaded rod is rotatably connected to the inner wall of the support frame. The threads on both sides of the center point of the horizontal axial section of the threaded rod are arranged in opposite directions. Both ends of the threaded rod are threaded with a pressure plate. A movable plate is provided below the threaded rod. Two wedge plates are fixedly connected to the bottom of the movable plate. A push plate corresponding to the position of the strip frame is fixedly connected to the top of the movable plate. The push plate is slidably inserted into the strip frame.

[0006] Preferably, the bottom of the support frame is provided with a limiting groove, and the bottom end of the pressure plate is slidably inserted into the limiting groove.

[0007] Preferably, the top of the pressure plate is provided with an arc-shaped structure.

[0008] Preferably, a second spring is fixedly connected between each of the four top corners of the movable plate and the inner wall of the support frame.

[0009] Preferably, the motor is a servo motor.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This injection mold needle extraction mechanism, by controlling the starter motor, drives the threaded rod to rotate. At this time, the two pressure plates threaded onto the threaded rod move relative to each other, moving from the wide side to the narrow side of the wedge plate. Simultaneously, the moving plate falls, causing the push plate to move within the strip frame. At the same time, the first spring on the slide rod, which is in a compressed state, pushes the traction plate up and down on the slide rod under its own rebound force. Then, the traction plate pulls the mounting rod, thereby extracting the insert from the screw hole of the product inside the mold base. This utility model can conveniently extract the insert body through the mechanical linkage structure of a single motor, without the need for multiple sets of drive components, reducing manufacturing costs and improving the practicality of the device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a needle extraction mechanism for an injection mold according to the present invention;

[0013] Figure 2 This is an enlarged view of point A of the injection mold needle extraction mechanism of this utility model.

[0014] In the diagram: 1. Mold base; 2. Support frame; 3. Vertical plate; 4. Strip frame; 5. Slide rod; 6. Traction plate; 7. Mounting rod; 8. Insert pin; 9. First spring; 10. Motor; 11. Threaded rod; 12. Pressure plate; 13. Moving plate; 14. Wedge plate; 15. Push plate; 16. Second spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "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.

[0018] Please see Figure 1-2 This utility model provides an embodiment of a needle-pulling mechanism for injection molds, comprising a mold base 1 and a support frame 2. The mold base 1 is fixed to the top of the support frame 2 by two symmetrically arranged vertical plates 3. Multiple strip frames 4 are fixedly connected to the top of the support frame 2. Each of the multiple strip frames 4 has a sliding opening on both sides. A sliding rod 5 is fixedly connected inside the sliding opening. A traction plate 6 is slidably sleeved between two sliding rods 5. An installation rod 7 is fixedly connected to the top of the traction plate 6. The installation rod 7 passes through the mold base 1 and is fixedly connected to a pin 8. A first spring 9 is sleeved on the sliding rod 5. The two ends of the first spring 9 are fixedly connected to the traction plate 6 and the inner wall of the sliding opening, respectively. A motor 10 is fixedly connected to the outer wall of one side of the support frame 2. The output shaft of the motor 10 passes through the support frame 2 and is fixedly connected to a threaded rod 11. The threaded rod 11 is rotatably connected to the inner wall of the support frame 2. The center points of the horizontal axial section of the threaded rod 11 are... The threads on the sides are arranged in opposite directions. Both ends of the threaded rod 11 are threaded with pressure plates 12. A movable plate 13 is provided below the threaded rod 11. Two wedge plates 14 are fixedly connected to the bottom of the movable plate 13. A push plate 15 corresponding to the position of the strip frame 4 is fixedly connected to the top of the movable plate 13. The push plate 15 is slidably inserted into the strip frame 4. Specifically, the motor 10 can drive the threaded rod 11 to rotate. At this time, the two pressure plates 12 threaded on the threaded rod 11 move relative to each other, thus moving from the wide side to the narrow side of the wedge plate 14. At this time, the movable plate 13 falls down, causing the push plate 15 to move within the strip frame 4. At the same time, the first spring 9 on the slide rod 5, which is in a compressed state, pushes the traction plate 6 up and down on the slide rod 5 under its own rebound force. At this time, the traction plate 6 will pull the mounting rod 7, thereby pulling the insert pin 8 out of the screw hole of the product inside the mold base 1.

[0019] In this embodiment, the bottom of the support frame 2 is provided with a limiting groove, and the bottom end of the pressure plate 12 is slidably inserted into the limiting groove to provide sliding support for the bottom end of the pressure plate 12; the top end of the pressure plate 12 is provided with an arc-shaped structure to reduce the resistance during pressure; the top four corners of the moving plate 13 are all fixedly connected to the inner wall of the support frame 2 with second springs 16 to accelerate the rebound efficiency of the moving plate 13; the motor 10 is a servo motor.

[0020] Working principle: The starting motor 10 can drive the threaded rod 11 to rotate. At this time, the two pressure plates 12 threaded onto the threaded rod 11 move relative to each other, moving from the wide side to the narrow side of the wedge plate 14. At this time, the moving plate 13 falls down, driving the push plate 15 to move within the strip frame 4. Simultaneously, the first spring 9 on the slide rod 5, which is in a compressed state, pushes the traction plate 6 up and down on the slide rod 5 under its own rebound force. At this time, the traction plate 6 will pull the mounting rod 7, thereby pulling the insert pin 8 out of the screw hole of the product inside the mold base 1.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A needle-pulling mechanism for injection molds, comprising a mold base (1) and a support frame (2), characterized in that: The mold base (1) is fixed to the top of the support frame (2) by two symmetrically arranged upright plates (3). Multiple strip frames (4) are fixedly connected to the top of the support frame (2). Each of the multiple strip frames (4) has a sliding opening on both sides. A sliding rod (5) is fixedly connected inside the sliding opening. A traction plate (6) is slidably sleeved between two sliding rods (5). An installation rod (7) is fixedly connected to the top of the traction plate (6). The installation rod (7) passes through the mold base (1) and is fixedly connected to a pin (8). A first spring (9) is sleeved on the sliding rod (5). The two ends of the first spring (9) are fixedly connected to the traction plate (6) and the inner wall of the sliding opening, respectively. A fixed connection is made to the outer wall of one side of the support frame (2). There is a motor (10), the output shaft of the motor (10) passes through the support frame (2) and is fixedly connected to a threaded rod (11). The threaded rod (11) is rotatably connected to the inner wall of the support frame (2). The threads on both sides of the center point of the horizontal axis section of the threaded rod (11) are set in opposite directions. Both ends of the threaded rod (11) are threaded with a pressure plate (12). A movable plate (13) is provided below the threaded rod (11). Two wedge plates (14) are fixedly connected to the bottom of the movable plate (13). A push plate (15) corresponding to the position of the strip frame (4) is fixedly connected to the top of the movable plate (13). The push plate (15) is slidably inserted into the strip frame (4).

2. The injection mold needle extraction mechanism according to claim 1, characterized in that: The bottom of the support frame (2) is provided with a limiting groove, and the bottom end of the pressure plate (12) is slidably inserted into the limiting groove.

3. The injection mold needle extraction mechanism according to claim 1, characterized in that: The top of the pressure plate (12) is arranged in an arc shape.

4. The injection mold needle extraction mechanism according to claim 1, characterized in that: The top four corners of the movable plate (13) are all fixedly connected to the inner wall of the support frame (2) with second springs (16).

5. The injection mold needle extraction mechanism according to claim 1, characterized in that: The motor (10) is a servo motor.

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