Water gap shearing device for automobile injection molded part

Abstract

The utility model provides a water gap shearing device for an automobile injection molded part, which comprises a horizontally arranged rack and a placing seat arranged below the rack and used for bearing the injection molded part, a lifting device is arranged on the rack, a cutting mechanism is arranged at one end, close to the placing seat, of the lifting device, and the lifting device can drive the cutting mechanism to move up and down; a fixing device for fixing an injection molding part is arranged on the placing seat and comprises an adjusting mechanism and a clamping mechanism; the adjusting mechanism comprises a pair of moving blocks, the moving blocks are movably arranged and can move on the top face of the containing base in a linear track mode, the moving blocks can be locked to the designated positions of the linear track through locking mechanisms, telescopic rods are installed above the moving blocks, and a second rotating base is installed at the ends, away from the moving blocks, of the telescopic rods. The clamping mechanism comprises a clamping jaw arranged on a second rotating seat, the clamping jaw can rotate through the second rotating seat, and the clamping face of the clamping jaw is perpendicular to the rotating axis of the clamping jaw and coplanar with the rotating axis of the clamping jaw. The second rotating seat is further provided with an angle fixing mechanism for locking the angle of the clamping jaw.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water gap shearing, especially an automobile injection molding part's water gap shearing device. BACKGROUND

[0002] There are many plastic parts formed by injection molding in the automobile parts. In the injection molding process of these plastic automobile parts, water gap will inevitably be formed on the parts, which not only affects the use performance of the parts but also has a great negative impact on the appearance of the automobile. Therefore, the water gap of the automobile injection molding part usually needs to be sheared off by a water gap shearing machine. The cutting knife part of the existing water gap shearing machine is mostly a plate-shaped blade or a scissors-shaped blade. Therefore, for the water gap on some injection molding parts with spherical structure (such as the fillet of the injection molding part treated by rounding, such as the car lamp cover), an edge will still be formed at the root of the water gap after shearing by the existing water gap shearing machine, which is not coordinated with the spherical structure of the injection molding part itself, and the surface smoothness of the sheared injection molding part is not enough.

[0003] To overcome the above-mentioned shortcomings, the prior art provides a water gap shearing machine for automobile injection molding parts with spherical surface which can effectively shear the water gap of the spherical structure part, as proposed in the Chinese patent with application number CN201921179038.4, which comprises a rack, an injection molding part placing seat, a cutting knife part and a cutting knife part driving mechanism. The cutting knife part driving mechanism is fixed to the upper part of the rack, and the cutting knife part driving mechanism comprises a first air cylinder fixed to the rack and a cutting knife part fixing seat connected to the end of the push rod of the first air cylinder, and the push-out direction of the push rod of the first air cylinder is parallel to the horizontal plane. The cutting knife part comprises an arc-shaped blade body and a cutting knife part connecting part, the bending direction of the blade body is consistent with the shape of the spherical surface of the injection molding part to be cut, and the cutting knife part connecting part is detachably connected with the cutting knife part fixing seat. The water gap shearing machine of the utility model can quickly shear the water gap of the injection molding part with spherical structure, and the surface of the sheared injection molding part is smooth, and the water gap part is well coordinated with the body of the injection molding part.

[0004] However, the existing technology similar to the above-mentioned patent has the following problems: the clamping mechanism cannot adjust and only clamps the bottom of the injection molding part, cannot adapt to injection molding parts of different specifications and shapes, and the cutting knife cuts in one direction when cutting the water gap, which easily causes the injection molding part to deform unevenly when cutting, which undoubtedly affects the cutting effect of the water gap of the injection molding part.

[0005] Therefore, there is a need for a water gap shearing device for automobile injection molding parts to solve the above-mentioned technical problems. UTILITY MODEL CONTENTS

[0006] To address the problems of existing clamping mechanisms that cannot be adjusted to only clamp the bottom of the injection molded part, making them unsuitable for products of different specifications, and the fact that the cutter cuts the sprue in a unidirectional manner, easily causing uneven stress and deformation in the injection molded part, this utility model proposes a sprue shearing device for automotive injection molded parts, the technical solution of which is as follows.

[0007] A sprue shearing device for automotive injection molded parts includes a horizontally arranged frame and a placement seat located below the frame for supporting the injection molded parts. A lifting device is provided on the frame, and a cutting mechanism is provided at one end of the lifting device near the placement seat. The lifting device can drive the cutting mechanism to move up and down.

[0008] The placement seat is equipped with a fixing device for fixing the injection molded part. The fixing device includes an adjustment mechanism and a clamping mechanism. The adjustment mechanism includes a pair of moving blocks, which are movably disposed on the top surface of the placement seat and can move along a linear trajectory on the top surface of the placement seat. The moving blocks can be locked at a specified position on the linear trajectory by a locking mechanism. A telescopic rod is installed above the moving blocks, and a second rotating seat is installed at the end of the telescopic rod away from the moving blocks. The end face of the second rotating seat is perpendicular to the placement seat. The clamping mechanism includes a gripper disposed on the second rotating seat. The gripper rotates on the end face of the second rotating seat, and the axis of rotation is perpendicular to the end face of the second rotating seat. The second rotating seat is also provided with an angle fixing mechanism to lock the angle of the gripper.

[0009] Furthermore, a sliding guide rail is provided on the top surface of the placement seat, the sliding guide rail is located on the center line of the top surface of the placement seat, the moving block is located on the sliding guide rail and can move along the track direction of the sliding guide rail, the locking mechanism includes a plurality of fixed threaded holes perpendicular to the top surface of the placement seat and equidistantly opened on both sides of the sliding guide rail along the sliding guide rail direction, and locking holes are opened on both sides of the moving block that can be coaxially aligned with the fixed threaded holes, and after alignment, bolts can be coaxially screwed into the fixed threaded holes and the locking holes for locking.

[0010] Furthermore, the top surface of the movable block is parallel to the top surface of the placement seat, and the telescopic rod includes a fixed sleeve rod vertically installed on the top surface of the movable block and a telescopic sub-rod movably coaxially inserted in the fixed sleeve rod. A fixing mechanism capable of fixing the telescopic sub-rod at a specified height and an anti-detachment mechanism preventing the telescopic sub-rod from falling off are provided between the fixed sleeve rod and the telescopic sub-rod.

[0011] Furthermore, the fixing mechanism includes a plurality of fixing through holes equidistantly opened on the fixing sleeve rod along its own axis, the axis of the fixing through holes being perpendicular to the axis of the fixing sleeve rod, and a plurality of mating through holes equidistantly opened on the telescopic sub-rod along its own axis, wherein fixing pins are inserted coaxially into the mating through holes and fixing through holes to achieve positioning of the telescopic sub-rod within the fixing sleeve rod.

[0012] Furthermore, the anti-detachment mechanism includes a detachable fixing cover disposed on the top of the fixing sleeve rod, the telescopic sub-rod passing through the fixing cover and disposed in the fixing sleeve rod, and the telescopic sub-rod located in the fixing sleeve rod has a limiting protrusion on its body, the fixing cover and the limiting protrusion cooperating to limit the telescopic sub-rod.

[0013] Furthermore, a second rotating seat is installed on the top of the telescopic sub-rod. The second rotating seat is a disc-shaped structure. A rotating disk is coaxially rotatably mounted on one end face of the second rotating seat. A gripper is installed on the side of the rotating disk away from the second rotating seat, and the gripper is rotated by the rotating disk.

[0014] Furthermore, the angle fixing mechanism includes a first positioning hole on the rotating disk, the axis of which is parallel to the axis of the rotating disk. It also includes a plurality of second positioning holes on the second rotating seat, the plurality of second positioning holes being distributed at equal angles along the circumference of the second rotating seat and the axis of which is parallel to the axis of the first positioning hole. After the first positioning hole is aligned with any of the second positioning holes by rotating the rotating disk, the bolt is simultaneously screwed into the first positioning hole and the second positioning hole to position the rotating disk.

[0015] Furthermore, the gripper is a cylinder-driven double-jaw structure, with the cylinder connected to the back of the gripper. The opening and closing of the gripper is controlled by the extension and retraction of the cylinder, and the direction of movement of the double jaws is parallel to the end face of the second rotating seat.

[0016] Furthermore, the lifting device includes a lifting cylinder fixed on the frame. The lifting cylinder includes a fixed part fixed on the frame and a vertically moving telescopic part. The telescopic part is fixedly connected to the cutting mechanism to realize the up and down movement of the cutting mechanism.

[0017] Furthermore, the cutting mechanism includes a pair of hydraulic cylinders connected by a connecting block. A mounting plate is provided on the side of the hydraulic cylinders away from the connecting block. Cutting blades are symmetrically fixed on the lower parts of both sides of the mounting plate. The pair of hydraulic cylinders drive their respective cutting blades to reciprocate in the horizontal direction to shear the sprue.

[0018] This utility model has the following advantages: it supports multi-directional clamping of injection molded parts of different sizes and shapes through sliding guide rails, telescopic rod height adjustment, and multi-angle locking of rotating disk, avoiding the limitation of only clamping the bottom; it adopts bidirectional synchronous cutting blades (hydraulic cylinder drives the blades to move in opposite directions), which improves the problem of uneven force during unidirectional cutting and reduces the deformation of injection molded parts; the height, angle and cutting stroke of the clamps are adjustable, and combined with the anti-detachment mechanism and the locking design of the fixing pin, it improves the stability of equipment operation and the reliability of workpiece fixation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the top surface of the placement base of this utility model;

[0021] Figure 3 This is a schematic diagram of the movable block, telescopic rod, and angle fixing mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the lifting device and cutting mechanism of this utility model.

[0023] In the above figures: 1. Frame; 2. Placement seat; 3. Lifting cylinder; 4. Fixing part; 5. Telescopic part; 6. Hydraulic cylinder; 7. Connecting block; 8. Mounting plate; 9. Cutting blade; 10. Moving block; 11. Sliding guide rail; 12. Fixing threaded hole; 13. Locking hole; 14. Fixing sleeve rod; 15. Telescopic rod; 16. Fixing through hole; 17. Matching through hole; 18. Limiting protrusion; 19. Fixing pin; 20. Fixing cover; 21. Second rotating seat; 22. Rotary disk; 23. Gripper; 24. First positioning hole; 25. Second positioning hole; 26. Injection molded part; 27. Sprue. Detailed Implementation

[0024] The present invention will now be described with reference to the accompanying drawings:

[0025] like Figure 1 , Figure 4 As shown, a sprue shearing device for automotive injection molded parts includes a horizontally arranged frame 1 and a placement seat 2 located below the frame 1 for supporting the injection molded part 26. A lifting device is provided on the frame 1, and a cutting mechanism is provided at one end of the lifting device near the placement seat 2. The lifting device can drive the cutting mechanism to move up and down.

[0026] like Figure 1 , Figure 3 , Figure 4 As shown, the placement seat 2 is provided with a fixing device for fixing the injection molded part 26. The fixing device includes an adjustment mechanism and a clamping mechanism. The adjustment mechanism includes a pair of moving blocks 10, which are movably disposed on the top surface of the placement seat 2 and can move along a linear trajectory on the top surface of the placement seat 2. The moving blocks 10 can be locked at a specified position on the linear trajectory by a locking mechanism. A telescopic rod is installed above the moving blocks 10, and a second rotating seat 21 is installed at the end of the telescopic rod away from the moving blocks 10. The end face of the second rotating seat 21 is perpendicular to the placement seat. The clamping mechanism includes a jaw 23 disposed on the second rotating seat 21. The jaw 23 rotates on the end face of the second rotating seat 21, and the axis of rotation is perpendicular to the end face of the second rotating seat 21. The second rotating seat 21 is also provided with an angle fixing mechanism to lock the angle of the jaw 23.

[0027] like Figure 1 , Figure 2 , Figure 3As shown, preferably, a sliding guide rail 11 is provided on the top surface of the placement base 2. The sliding guide rail 11 is located on the center line of the top surface of the placement base 2. The moving block 10 is disposed on the sliding guide rail 11 and can move along the track direction of the sliding guide rail 11. The locking mechanism includes a plurality of fixed threaded holes 12 equidistantly opened on both sides of the sliding guide rail 11 along the direction of the sliding guide rail 11, perpendicular to the top surface of the placement base 2. Locking holes 13 are opened on both sides of the moving block 10, which can be coaxially aligned with the fixed threaded holes 12. After alignment, bolts can be screwed coaxially into the fixed threaded holes 12 and the locking holes 13 for locking. By limiting the movement trajectory by the sliding guide rail 11, it is ensured that the pair of clamping mechanisms can be adjusted symmetrically to adapt to injection molded parts 26 of different sizes. After adjusting the position of the moving block 10, it is fixed to prevent displacement during clamping and improve clamping stability.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the top surface of the movable block 10 is parallel to the top surface of the placement seat 2. The telescopic rod includes a fixed sleeve rod 14 vertically installed on the top surface of the movable block 10 and a telescopic sub-rod 15 movably and coaxially inserted in the fixed sleeve rod 14. A fixing mechanism capable of fixing the telescopic sub-rod 15 at a specified height and an anti-detachment mechanism preventing the telescopic sub-rod 15 from falling off are provided between the fixed sleeve rod 14 and the telescopic sub-rod 15.

[0029] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the fixing mechanism includes a plurality of fixing through holes 16 equidistantly opened along its own axis on the fixing sleeve 14, the axis of the fixing through holes 16 being perpendicular to the axis of the fixing sleeve 14; and a plurality of mating through holes 17 equidistantly opened along its own axis on the telescopic sub-rod 15. The mating through holes 17 and the fixing through holes 16 are coaxially inserted with fixing pins 19 to achieve positioning of the telescopic sub-rod 15 within the fixing sleeve 14. By adjusting the height of the telescopic sub-rod 15, it can adapt to different heights of the sprue 27.

[0030] like Figure 3 As shown, preferably, the anti-detachment mechanism includes a detachable fixed cover 20 disposed on the top of the fixed sleeve rod 14, the telescopic sub-rod 15 passing through the fixed cover 20 and disposed in the fixed sleeve rod 14, and the telescopic sub-rod 15 is provided with a limiting protrusion 18 on the rod body located in the fixed sleeve rod 14. The fixed cover 20 and the limiting protrusion 18 cooperate to limit the telescopic sub-rod 15, ensuring the stability of the telescopic sub-rod 15 and the safety of preventing it from falling off after height adjustment.

[0031] like Figure 1 , Figure 3As shown, preferably, a second rotating seat 21 is mounted on the top of the telescopic rod 15. The second rotating seat 21 has a disc-shaped structure, and a rotating disk 22 is coaxially rotatably mounted on one end face of the second rotating seat 21. A gripper 23 is mounted on the side of the rotating disk 22 away from the second rotating seat 21, and the gripper 23 is rotated by the rotating disk 22. The gripper 23 is rotated at multiple angles by the rotating disk 22 to adapt to the irregular surface of the injection molded part 26.

[0032] like Figure 3 As shown, preferably, the angle fixing mechanism includes a first positioning hole 24 on the rotating disk 22, the axis of which is parallel to the axis of the rotating disk 22. It also includes a plurality of second positioning holes 25 on the second rotating seat 21. These second positioning holes 25 are evenly distributed circumferentially around the second rotating seat 21, and their axes are parallel to the axis of the first positioning hole 24. By rotating the rotating disk 22 to align the first positioning hole 24 with any of the second positioning holes 25, bolts are simultaneously screwed into both the first and second positioning holes 24 to position the rotating disk 22. This achieves precise locking of the gripper 23's rotation angle, preventing uneven force on the workpiece due to angular deviation during clamping.

[0033] like Figure 3 As shown, preferably, the gripper 23 is a cylinder-driven double-claw structure, with the cylinder connected to the back of the gripper 23. The opening and closing of the gripper 23 is controlled by the extension and retraction of the cylinder, and the direction of movement of the double claws is parallel to the end face of the second rotating seat 21.

[0034] like Figure 1 , Figure 4 As shown, preferably, the lifting device includes a lifting cylinder 3 fixed on the frame 1. The lifting cylinder 3 includes a fixed part 4 fixed on the frame 1 and a vertically moving telescopic part 5. The telescopic part 5 is fixedly connected to the cutting mechanism to realize the up and down movement of the cutting mechanism.

[0035] like Figure 1 , Figure 4 As shown, preferably, the cutting mechanism includes a pair of hydraulic cylinders 6 connected by a connecting block 7. A mounting plate 8 is provided on the side of each hydraulic cylinder 6 away from the connecting block 7. Cutting blades 9 are symmetrically fixed to the lower parts of both sides of the mounting plate 8. The pair of hydraulic cylinders 6 drive their respective cutting blades 9 to reciprocate in opposite directions in the horizontal direction to shear the sprue 27. This shearing method, with the pair of blades moving in opposite directions, balances the lateral force during cutting, reducing deformation of the injection molded part 26 caused by unilateral force.

[0036] It should also be noted that the hydraulic cylinder 6, air cylinder and other components used in this utility model are all driven by air source and oil source not shown in the figure.

[0037] The following section details the operational steps and functional logic of this mechanism in conjunction with the technical solution:

[0038] First, place the workpiece. Using a robotic arm or manually, place the injection molded part 26 onto the placement seat 2, ensuring the sprue 27 is close to the cutting mechanism. Based on the workpiece size, move a pair of moving blocks 10 along the sliding guide rail 11 and lock them in the desired position with bolts. Then, adjust the height and angle of the gripper 23: pull out the fixing pin 19, adjust the height of the telescopic rod 15, and then reinsert the fixing pin 19 to lock it. Loosen the bolts on the rotating disk 22, rotate the gripper 23 to the required angle, making the clamping surface fit against the workpiece surface. Align the rotating disk 22 with the positioning holes of the second rotating seat 21 and tighten with bolts. For products of the same specification, only one adjustment is needed. After adjustment, the subsequent injection molded part 26 only needs to be placed in the designated position, and the cylinder should be activated to drive the gripper 23 to close, firmly clamping the injection molded part 26. The cutting mechanism is then driven down to the height of the sprue 27 by the lifting cylinder 3. The hydraulic cylinder 6 is activated, driving the two cutting blades 9 to move towards each other, simultaneously applying shearing force to cut off the sprue 27.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sprue shearing device for automotive injection molded parts, characterized in that: It includes a horizontally arranged frame (1) and a placement seat (2) located below the frame (1) for supporting injection molded parts (26). The frame (1) is equipped with a lifting device, and a cutting mechanism is provided at one end of the lifting device near the placement seat (2). The lifting device can drive the cutting mechanism to move up and down. The placement seat (2) is provided with a fixing device for fixing the injection molded part (26). The fixing device includes an adjustment mechanism and a clamping mechanism. The adjustment mechanism includes a pair of moving blocks (10). The pair of moving blocks (10) are movably disposed on the top surface of the placement seat (2) and can move along a linear trajectory on the top surface of the placement seat (2). The moving blocks (10) can be locked at a specified position on the linear trajectory by a locking mechanism. A telescopic rod is installed above the moving blocks (10). A second rotating seat (21) is installed at the end of the telescopic rod away from the moving blocks (10). The end face of the second rotating seat (21) is perpendicular to the placement seat. The clamping mechanism includes a jaw (23) disposed on the second rotating seat (21). The jaw (23) rotates on the end face of the second rotating seat (21), and the axis of rotation is perpendicular to the end face of the second rotating seat (21). The second rotating seat (21) is also provided with an angle fixing mechanism to lock the angle of the jaw (23).

2. The sprue shearing device for automotive injection molded parts according to claim 1, characterized in that: A sliding guide rail (11) is provided on the top surface of the placement seat (2). The sliding guide rail (11) is located on the center line of the top surface of the placement seat (2). The moving block (10) is located on the sliding guide rail (11) and can move along the track direction of the sliding guide rail (11). The locking mechanism includes a plurality of fixed threaded holes (12) perpendicular to the top surface of the placement seat (2) and equidistantly opened on both sides of the sliding guide rail (11) along the direction of the sliding guide rail (11). Locking holes (13) that can be coaxially aligned with the fixed threaded holes (12) are opened on both sides of the moving block (10). After alignment, bolts can be coaxially screwed into the fixed threaded holes (12) and the locking holes (13) for locking.

3. The sprue shearing device for automotive injection molded parts according to claim 2, characterized in that: The top surface of the movable block (10) is parallel to the top surface of the placement seat (2). The telescopic rod includes a fixed sleeve rod (14) vertically installed on the top surface of the movable block (10) and a telescopic sub-rod (15) movably coaxially inserted in the fixed sleeve rod (14). A fixing mechanism capable of fixing the telescopic sub-rod (15) at a specified height and an anti-detachment mechanism preventing the telescopic sub-rod (15) from falling off are provided between the fixed sleeve rod (14) and the telescopic sub-rod (15).

4. The sprue shearing device for automotive injection molded parts according to claim 3, characterized in that: The fixing mechanism includes a plurality of fixing through holes (16) equidistantly opened on the fixing sleeve (14) along its own axis, the axis of the fixing through holes (16) being perpendicular to the axis of the fixing sleeve (14), and a plurality of mating through holes (17) equidistantly opened on the telescopic sub-rod (15) along its own axis. The mating through holes (17) and the fixing through holes (16) are coaxially inserted with fixing pins (19) to realize the positioning of the telescopic sub-rod (15) within the fixing sleeve (14).

5. The sprue shearing device for automotive injection molded parts according to claim 3, characterized in that: The anti-detachment mechanism includes a detachable fixed cover (20) set on the top of the fixed sleeve rod (14). The telescopic sub-rod (15) passes through the fixed cover (20) and is set in the fixed sleeve rod (14). The telescopic sub-rod (15) is provided with a limiting protrusion (18) on the rod body located in the fixed sleeve rod (14). The fixed cover (20) and the limiting protrusion (18) cooperate to limit the telescopic sub-rod (15).

6. The sprue shearing device for automotive injection molded parts according to claim 3, characterized in that: The top of the telescopic sub-rod (15) is equipped with a second rotating seat (21), which is a disc-shaped structure. A rotating disk (22) is coaxially rotatably arranged on one side end face of the second rotating seat (21). A gripper (23) is installed on the side of the rotating disk (22) away from the second rotating seat (21). The gripper (23) is rotated by the rotating disk (22).

7. The sprue shearing device for automotive injection molded parts according to claim 6, characterized in that: The angle fixing mechanism includes a first positioning hole (24) on the rotating disk (22), the axis of the first positioning hole (24) being parallel to the axis of the rotating disk (22), and a plurality of second positioning holes (25) on the second rotating seat (21). The plurality of second positioning holes (25) are distributed at equal angles along the circumference of the second rotating seat (21) and their axes are parallel to the axis of the first positioning hole (24). After the first positioning hole (24) is aligned with any of the second positioning holes (25) by rotating the rotating disk (22), the bolt is simultaneously screwed into the first positioning hole (24) and the second positioning hole (25) to position the rotating disk (22).

8. The sprue shearing device for automotive injection molded parts according to claim 6, characterized in that: The gripper (23) is a cylinder-driven double-claw structure. The cylinder is connected to the back of the gripper (23). The opening and closing of the gripper (23) is controlled by the extension and retraction of the cylinder. The direction of movement of the double claws is parallel to the end face of the second rotating seat (21).

9. The sprue shearing device for automotive injection molded parts according to claim 1, characterized in that: The lifting device includes a lifting cylinder (3) fixed on the frame (1). The lifting cylinder (3) includes a fixed part (4) fixed on the frame (1) and a vertically moving telescopic part (5). The telescopic part (5) is fixedly connected to the cutting mechanism to realize the up and down movement of the cutting mechanism.

10. The sprue shearing device for automotive injection molded parts according to claim 1, characterized in that: The cutting mechanism includes a pair of hydraulic cylinders (6) connected by a connecting block (7). A mounting plate (8) is provided on the side of the hydraulic cylinders (6) away from the connecting block (7). Cutting blades (9) are symmetrically fixed on the lower parts of both sides of the mounting plate (8). The pair of hydraulic cylinders (6) drive their respective cutting blades (9) to reciprocate in the horizontal direction to shear the sprue (27).

Images