A plastic workpiece extraction mechanism for an injection mold

Abstract

The utility model relates to injection molding processing technical field provides a kind of plastic workpiece suction mechanism for injection mold, including bottom plate;The one end of bottom plate top is provided with suction platform, and both sides of suction platform bottom are uniformly provided with fixed base, the both ends of fixed base bottom are uniformly provided with suction cup, the bottom of suction platform is provided with adjusting mechanism.The utility model is provided with bottom plate, suction platform, vacuum pump, fixed base, suction cup and adjusting mechanism, adjusting mechanism includes support, first drive motor, bidirectional screw rod, movable sleeve and adjusting frame, first drive motor drives bidirectional screw rod rotation, so that movable sleeve is mutually close or separate along bidirectional screw rod, and then drive adjusting frame and inside fixed base and suction cup carry out the adjustment of interval, different size plastic workpiece can be adapted, and for injection molding piece with inclined plane or camber, suction cup disc surface and plastic workpiece surface can be kept adhering state by adjusting angle, improve negative pressure sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to a plastic workpiece suction mechanism for injection molds. Background Technology

[0002] A plastic workpiece suction device is a device used to remove molded plastic workpieces from an injection mold. Its main function is to contact the surface of the plastic workpiece and form an adhesive force to fix the workpiece in place.

[0003] Currently, the most common suction mechanism is the negative pressure suction cup. It creates negative pressure by extracting air from the suction cup, thereby adsorbing the plastic workpiece. For example, a plastic workpiece suction device for injection molds disclosed in patent number CN218314875U uses an external negative pressure device to firmly pick up the plastic workpiece through the suction cup. Unlike mechanical grippers, it does not "clamp" the workpiece, thus avoiding physical damage such as pinching, scratches, and indentations. However, the position of the suction cup in this type of suction device is generally fixed. Injection molding production often requires switching between workpieces of different sizes and shapes. The fixed position of the suction cup often cannot be fully adapted to the workpiece, affecting the suction effect. Utility Model Content

[0004] The purpose of this invention is to provide a plastic workpiece suction mechanism for injection molds, which solves the problem that existing suction mechanisms are not conducive to adjustment according to the size and shape of the workpiece.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a plastic workpiece suction mechanism for injection molds, including a base plate;

[0006] A suction platform is provided at one end of the top of the base plate, and fixed seats are provided on both sides of the bottom of the suction platform. Suction cups are provided at both ends of the bottom of the fixed seats. An adjustment mechanism is provided at the bottom of the suction platform. The adjustment mechanism includes a bidirectional screw rod that is mounted on the center of the bottom of the suction platform via a bracket. Movable sleeves are fitted at both ends of the bidirectional screw rod, and an adjustment frame is provided at the bottom of each movable sleeve.

[0007] The adjustment mechanism also includes a drive box located on one side of the adjustment frame, and the drive box has a drive gear installed inside via a second drive motor. Each drive gear has a driven gear meshing below it, and one end of each driven gear is connected to a fixed base via a connecting shaft.

[0008] Preferably, a vacuum pump is provided at the center of the top of the suction platform, and the suction end of the vacuum pump is connected to the suction cup through a guide pipe.

[0009] The above structure allows the vacuum pump to stably provide negative pressure to all suction cups, ensuring that multiple suction cups form adsorption force synchronously, and avoiding unstable adsorption or detachment of workpieces due to uneven negative pressure supply.

[0010] Preferably, a first drive motor is fixed at the center of one side of the bracket, and the output end of the first drive motor is connected to a bidirectional lead screw. Guide rods are provided in the brackets at both ends of the bidirectional lead screw, and guide sleeves are provided on the top of the adjustment frame.

[0011] With the above structure, the bidirectional lead screw can be driven to rotate by the first drive motor to adjust the suction cup spacing, and the guide rod and guide sleeve can be used to prevent the adjustment frame from shifting when moving.

[0012] Preferably, a frame is provided on the bottom plate on one side of the suction table, and a connector is provided inside the frame through a pivot, with one side of the connector connected to the suction table.

[0013] The above structure provides stable support for the rotating shaft by means of the frame, and the rotating shaft is connected to the suction table by the connector, ensuring that the suction table can rotate stably around the rotating shaft, providing a reliable structural foundation for workpiece flipping.

[0014] Preferably, one end of the rotating shaft extends to the outside of the frame, and a transmission gear is provided at one end of the rotating shaft, with a rack meshing below the transmission gear.

[0015] With the above structure, the linear motion of the rack can be converted into the rotational motion of the shaft through the meshing transmission gears, thereby driving the suction table to rotate.

[0016] Preferably, a cylinder is provided on the base plate at one end of the frame, and a movable plate is provided at the output end of the cylinder through a telescopic column, the movable plate being connected to one side of the rack.

[0017] With the above structure, a stable linear driving force can be provided by the cylinder, which is transmitted to the rack through the movable plate, ensuring that the rack can slide at a uniform speed and stably, providing continuous and controllable power for the tilting of the suction table.

[0018] Preferably, a guide groove is provided on the base plate below the rack, and the bottom end of the rack is slidably connected to the guide groove by a guide block.

[0019] With the above structure, the sliding direction of the rack can be restricted by the embedded cooperation of the guide groove and the guide block, so as to avoid the rack from deviating or getting stuck when sliding, and to ensure stable meshing between the rack and the transmission gear.

[0020] The advantages of the plastic workpiece suction mechanism for injection molds provided by this utility model are as follows:

[0021] The system comprises a base plate, a suction platform, a vacuum pump, a fixed base, suction cups, and an adjustment mechanism. The suction platform is positioned above the injection mold, and the suction cups contact the surface of the plastic workpiece. The suction end of the vacuum pump is connected to the suction cups via air guide pipes. By generating negative pressure inside the suction cups, the plastic workpieces are sucked up. The adjustment mechanism includes a bracket, a first drive motor, a bidirectional lead screw, a movable sleeve, and an adjustment frame. The first drive motor drives the bidirectional lead screw to rotate, causing the movable sleeves to move closer or further apart along the lead screw. This, in turn, adjusts the spacing between the adjustment frame, the internal fixed base, and the suction cups, adapting to plastic workpieces of different sizes and ensuring that the suction cups are always aligned with the effective adsorption area of ​​the plastic workpiece. The adjustment mechanism also includes a drive box located on one side of the adjustment frame. A second drive motor inside the drive box drives the drive gear to rotate via a roller, causing the driven gear to rotate. One end of each driven gear is connected to the fixed base via a connecting shaft, thus driving the fixed base and suction cups to adjust the adsorption angle. For injection molded parts with inclined or curved surfaces, the angle can be adjusted to keep the suction cup surface in contact with the surface of the plastic workpiece, improving the negative pressure sealing effect.

[0022] Equipped with a cylinder, rack, connector, transmission gear, and rotating shaft, the suction table picks up the plastic workpiece. The cylinder drives the rack to move linearly, and the transmission gear meshes with the rack, thus converting it into rotational motion. When the transmission gear rotates, it drives the rotating shaft to rotate, which in turn drives the suction table to rotate around the shaft. The plastic workpiece can be flipped 180° directly after being picked up. After being flipped, the plastic workpiece is in a fixed position with its bottom facing up, making it easy for workers to check whether there are any defects on the bottom of the injection-molded plastic workpiece. By checking the bottom quality in time, defective products are prevented from flowing into subsequent processes. Attached Figure Description

[0023] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional bottom view of the adjustment mechanism of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the adjustment frame of this utility model;

[0026] Figure 4 This is a schematic diagram of the flip-up suction table structure of this utility model;

[0027] Figure 5 This is a three-dimensional rear view structural schematic diagram of the present invention.

[0028] The following are the annotations in the figure: 1. Base plate; 2. Suction table; 3. Vacuum pump; 4. Suction cup; 5. Adjustment mechanism; 501. Support; 502. First drive motor; 503. Two-way lead screw; 504. Movable sleeve; 505. Adjustment frame; 506. Drive box; 507. Second drive motor; 508. Drive gear; 509. Driven gear; 6. Cylinder; 7. Frame; 8. Rotating shaft; 9. Transmission gear; 10. Rack; 11. Guide groove; 12. Fixed seat; 13. Movable plate; 14. Connecting part. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-5 The present invention provides a plastic workpiece suction mechanism for injection molds, including a base plate 1;

[0031] Please see Figure 1 A suction platform 2 is provided at one end of the top of the base plate 1, and a fixed seat 12 is provided on both sides of the bottom of the suction platform 2. A suction cup 4 is provided at both ends of the bottom of the fixed seat 12. A vacuum pump 3 is provided at the center of the top of the suction platform 2, and the suction end of the vacuum pump 3 is connected to the suction cup 4 through the air guide pipe.

[0032] The suction platform 2 is located above the injection mold. After the injection mold is opened, the ejection mechanism inside the injection mold ejects the plastic workpiece. The suction cup 4 contacts the surface of the plastic workpiece. Then, the vacuum pump 3 at the top center of the suction platform 2 is started. Its suction end draws air from inside the suction cup 4 through the air guide pipe to form a negative pressure. The negative pressure makes the suction cup 4 tightly adsorb the plastic workpiece.

[0033] Please see Figures 1-3The bottom of the suction table 2 is provided with an adjustment mechanism 5, and the adjustment mechanism 5 includes a bidirectional lead screw 503 set at the center of the bottom of the suction table 2 via a bracket 501. Both ends of the bidirectional lead screw 503 are fitted with movable sleeves 504, and the bottom of each movable sleeve 504 is provided with an adjustment frame 505. The adjustment mechanism 5 also includes a drive box 506 set on one side of the adjustment frame 505, and the drive box 506 is provided with a drive gear 508 through a second drive motor 507. The drive gear 508 is meshed with a driven gear 509 below it, and one end of each driven gear 509 is connected to the fixed seat 12 through a connecting shaft. A first drive motor 502 is fixed at the center of one side of the bracket 501, and the output end of the first drive motor 502 is connected to the bidirectional lead screw 503. Guide rods are provided in the brackets 501 at both ends of the bidirectional lead screw 503, and guide sleeves are provided on the top of the adjustment frame 505.

[0034] The position of the suction cup 4 can be adjusted according to the actual size of the plastic workpiece. When adjusting, the first drive motor 502 in the adjustment mechanism 5 is started, and its output end drives the bidirectional lead screw 503 to rotate. When the bidirectional lead screw 503 rotates, the movable sleeves 504 at both ends move closer or further apart along the bidirectional lead screw 503, and synchronously drive the adjustment frame 505 below to move. The bottom of the adjustment frame 505 is connected to the fixed base 12, which drives the suction cup 4 at the bottom of the fixed base 12 to adjust the spacing until the suction cup 4 is aligned with the effective adsorption area of ​​the plastic workpiece. The position of the suction cup 4 can be automatically adjusted according to the size of the plastic workpiece.

[0035] At the same time, by starting the second drive motor 507 in the drive box 506 on one side of the adjustment frame 505, the drive motor 507 drives the drive gear 508 to rotate through the roller. The drive gear 508 meshes with the driven gear 509 below, driving the driven gear 509 to rotate synchronously. One end of the driven gear 509 is connected to the fixed seat 12 through the connecting shaft, which ultimately drives the fixed seat 12 and the suction cup 4 at the bottom to rotate, so that the surface of the suction cup 4 is in contact with the surface of the plastic workpiece, improving the negative pressure sealing effect.

[0036] Please see Figure 1 , Figure 4 and Figure 5 A frame 7 is provided on the bottom plate 1 on one side of the suction table 2, and a connector 14 is provided inside the frame 7 through a rotating shaft 8. One side of the connector 14 is connected to the suction table 2. One end of the rotating shaft 8 extends to the outside of the frame 7, and a transmission gear 9 is provided at one end of the rotating shaft 8. A rack 10 meshes with the lower part of the transmission gear 9. A cylinder 6 is provided on the bottom plate 1 at one end of the frame 7, and a movable plate 13 is provided at the output end of the cylinder 6 through a telescopic column. The movable plate 13 is connected to one side of the rack 10. A guide groove 11 is provided on the bottom plate 1 below the rack 10. The bottom end of the rack 10 is slidably connected to the guide groove 11 through a guide block.

[0037] After the suction cup 4 picks up the plastic workpiece, the cylinder 6 at one end of the frame 7 on the base plate 1 is activated. Its output end pushes the movable plate 13 to move linearly through the telescopic column. The movable plate 13 is connected to one side of the rack 10, which drives the rack 10 to slide along the guide groove 11 on the base plate 1. The rack 10 meshes with the transmission gear 9 on the outside of the frame 7. The linear motion of the rack 10 is converted into the rotational motion of the transmission gear 9. The transmission gear 9 is fixedly connected to one end of the rotating shaft 8, which drives the rotating shaft 8 to rotate around the inside of the frame 7. This causes the suction table 2 to rotate 180° around the rotating shaft 8, so that the bottom of the plastic workpiece is facing upwards. This makes it easier for workers to check the bottom of the plastic workpiece after it has been flipped over, and to confirm whether there are defects such as bubbles, missing material, or shrinkage marks. By checking the bottom quality in time, defective products are prevented from flowing into subsequent processes.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plastic workpiece suction mechanism for injection molds, comprising a base plate (1); Its features are: The bottom plate (1) is provided with a suction platform (2) at one end of the top, and a fixed seat (12) is provided on both sides of the bottom of the suction platform (2). A suction cup (4) is provided at both ends of the bottom of the fixed seat (12). An adjustment mechanism (5) is provided at the bottom of the suction platform (2). The adjustment mechanism (5) includes a bidirectional screw (503) provided at the center of the bottom of the suction platform (2) via a bracket (501). A movable sleeve (504) is provided at both ends of the bidirectional screw (503), and an adjustment frame (505) is provided at the bottom end of the movable sleeve (504). The adjustment mechanism (5) also includes a drive box (506) located on one side of the adjustment frame (505), and the drive box (506) is equipped with a drive gear (508) through a second drive motor (507). Each drive gear (508) is meshed with a driven gear (509) below it, and one end of each driven gear (509) is connected to the fixed seat (12) through a connecting shaft.

2. The plastic workpiece suction mechanism for injection molds according to claim 1, characterized in that: A vacuum pump (3) is installed at the center of the top of the suction platform (2), and the suction end of the vacuum pump (3) is connected to the suction cup (4) through the air guide pipe.

3. The plastic workpiece suction mechanism for injection molds according to claim 1, characterized in that: A first drive motor (502) is fixed at the center of one side of the bracket (501), and the output end of the first drive motor (502) is connected to the bidirectional lead screw (503). Guide rods are provided in the brackets (501) at both ends of the bidirectional lead screw (503), and guide sleeves are provided on the top of the adjusting frame (505).

4. The plastic workpiece suction mechanism for injection molds according to claim 1, characterized in that: A frame (7) is provided on the bottom plate (1) on one side of the suction table (2), and a connector (14) is provided inside the frame (7) through a rotating shaft (8). One side of the connector (14) is connected to the suction table (2).

5. A plastic workpiece suction mechanism for injection molds according to claim 4, characterized in that: One end of the rotating shaft (8) extends to the outside of the frame (7), and a transmission gear (9) is provided at one end of the rotating shaft (8), with a rack (10) meshing below the transmission gear (9).

6. A plastic workpiece suction mechanism for injection molds according to claim 5, characterized in that: A cylinder (6) is provided on the bottom plate (1) at one end of the frame (7), and a movable plate (13) is provided at the output end of the cylinder (6) through a telescopic column. The movable plate (13) is connected to one side of the rack (10).

7. A plastic workpiece suction mechanism for injection molds according to claim 6, characterized in that: A guide groove (11) is provided on the base plate (1) below the rack (10), and the bottom end of the rack (10) is slidably connected to the guide groove (11) by a guide block.

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