A quick mold changing mechanism for an injection molding machine

Abstract

The present invention discloses a quick mold changing mechanism for an injection molding machine, which relates to the technical field of plastic products and aims to solve the technical problem of low mold changing efficiency of plastic fork molds. In the present invention, when the circular moving mechanism drives the fork gap processing mechanism to move along the slide groove of the moving part, the end of the fork gap processing mechanism away from the circular moving mechanism is limited by the wavy inner wall of the wave groove, forcing the processing end to generate S-shaped shaking during the movement. This shaking is converted into high-frequency reciprocating motion through a mechanical structure, which can accurately penetrate into the serrated gaps and grooves of the plastic fork mold and efficiently hook out stubborn residual material chips. Compared with traditional manual cleaning or single-direction scraping methods, this structure utilizes the annular layout of the ring frame and the limiting characteristics of the wave groove to achieve synchronous coupling of the cleaning action and the movement of the mechanism, avoiding additional cleaning processes and time consumption, improving the efficiency of mold residue cleaning, and thus shortening the overall mold change cycle to meet the production needs of rapid mold change.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic products, and more particularly to a quick mold changing mechanism for an injection molding machine. Background Art

[0002] Injection molding technology, due to its high efficiency and precision, is widely used in the production of various plastic products, with plastic forks being a typical application. However, existing mold change technology for fork injection molding machines faces numerous challenges that need to be addressed, severely restricting production efficiency and product quality.

[0003] Currently, fork injection molding machines on the market are prone to residual material chips during mold changes, a problem that has become a key factor affecting mold change efficiency. Due to the thin-walled, tooth-shaped structure of plastic forks, the mold cavity is complex, especially in areas such as the gaps between the teeth and the logo groove, making residual material chips extremely difficult to clean. The additional cleaning step exacerbates the already time-consuming mold change process due to mold disassembly and positioning, significantly extending the overall mold change time and severely reducing the production efficiency and utilization rate of the equipment.

[0004] Traditional cleaning methods typically rely on meticulous manual cleaning, and stubborn carbon deposits require additional steps like ultrasonic cleaning. This process is tedious and time-consuming, often taking hours or even longer to clean a single mold. In summary, existing mold-changing methods for fork injection molding machines suffer from inefficiency, cumbersome operation, and difficult cleaning, making them unable to meet the demands of modern injection molding production for efficiency, flexibility, and stability. To address this, we propose a rapid mold-changing mechanism for injection molding machines. Summary of the Invention

[0005] The purpose of the present invention is to provide a quick mold changing mechanism for an injection molding machine to solve the technical problem of low mold changing efficiency of plastic fork molds.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a quick mold change mechanism for an injection molding machine, comprising an injection molding machine body, a bracket symmetrically provided on the injection molding machine body, the bracket being located between an upper mold and a lower mold of the injection molding machine body, a lifting mechanism provided on the bracket, a mounting frame provided on an output end of the lifting mechanism, a ring frame provided on the mounting frame, a ring shifting mechanism provided on the ring frame, and a fork gap processing mechanism provided on a movable end of the ring shifting mechanism;

[0007] The ring frame includes a mounting portion and a moving portion, the ring-moving mechanism is provided on the mounting portion, the moving end of the ring-moving mechanism is provided on the moving portion, the moving portion is provided with annular sliding grooves at equal intervals, the fork gap processing mechanism is slidably provided on the sliding grooves, the inner wall of the sliding grooves is symmetrically provided with wave grooves, and the fork gap processing mechanism is slidably inserted into the wave groove at one end away from the ring-moving mechanism;

[0008] When the circular moving mechanism drives the fork gap processing mechanism to move, the processing end of the fork gap processing mechanism is limited by the wavy groove, causing the processing end to vibrate in an S shape, thereby hooking out the stubborn residue in the plastic fork injection mold, saving processing time, and realizing rapid mold change. In the present invention, when the circular moving mechanism drives the fork gap processing mechanism to move along the sliding groove of the moving part, the end of the fork gap processing mechanism away from the circular moving mechanism is limited by the wavy inner wall of the wavy groove, forcing the processing end to generate an S-shaped vibration during the movement. This vibration is converted into high-frequency reciprocating motion through a mechanical structure, which can accurately penetrate into the serrated gaps and grooves of the plastic fork mold and efficiently hook out stubborn residual material scraps. Compared with traditional manual cleaning or single-direction scraping methods, this structure utilizes the annular layout of the ring frame and the limiting characteristics of the wavy groove to achieve synchronous coupling of the cleaning action and the movement of the mechanism, avoiding additional cleaning processes and time consumption, improving the efficiency of mold residue cleaning, and thereby shortening the overall mold change cycle to meet the production needs of rapid mold change.

[0009] Preferably, the fork gap processing mechanism includes a slider, a spring and a processing block, one end of the slider is connected to the moving end of the circular movement mechanism, the other end of the slider is slidably arranged on the slide groove, the spring is connected to the slider, and the processing block is connected to the end of the spring away from the slider.

[0010] Preferably, a sliding ball is symmetrically rotatably provided on the processing block, and the sliding ball is slidably arranged in the wave groove at one end away from the processing block.

[0011] Preferably, the processing block includes a shaking part, a processing part, a transverse groove, a sliding shaft and a steel wire, the shaking part is connected to the end of the spring away from the slider, the processing part is connected to the end of the shaking part away from the spring, the transverse groove is linearly and evenly spaced apart at the end of the processing part away from the shaking part, the sliding shaft is movably inserted in the transverse groove, and the steel wire is connected to the end of the sliding shaft away from the transverse groove.

[0012] Preferably, the steel wire includes a straight end and a bent end, the straight end is connected to the sliding shaft, the bent end is connected to one end of the straight end away from the sliding shaft, and the bent end is triangular in shape.

[0013] Preferably, the movable portion is provided with a plurality of groups of expansion grooves at one end away from the mounting portion, and each group of the expansion grooves is symmetrically provided at both ends of the slide groove. The processing block is also movably connected to the expansion grooves, and the expansion grooves are bent at one end close to the outer wall of the ring frame.

[0014] Preferably, the processing block further includes a telescopic rod and a limiting ball rod, the telescopic rod is connected to one end of the sliding shaft away from the transverse groove, one end of the limiting ball rod is rotatably connected to the telescopic rod, and the other end of the limiting ball rod is rotatably connected to the expansion groove.

[0015] Preferably, when the circular movement mechanism drives the fork gap processing mechanism to move, the processing block causes the sliding shaft and the steel wire to shake due to the limitation of the sliding ball and the wave groove, and the sliding shaft is slidingly limited in the expansion groove by the telescopic rod and the limiting ball rod. Therefore, when the processing block drives the sliding shaft to move to the bending end of the expansion groove, the limiting ball rod pulls the telescopic rod to drive the sliding shaft and the steel wire to move on the transverse groove, which is suitable for cleaning the forked end of the plastic fork mold.

[0016] Preferably, the circular movement mechanism includes a motor, an output shaft, an outer gear ring, a gear and a gear plate. The motor is fixed in the mounting part, the output shaft is connected to the output end of the motor, the outer gear ring is rotatably arranged on the mounting part and connected to the output shaft, the gear is rotatably arranged on the mounting part in a ring shape with equal intervals, and the gear plate is fixedly connected to the slider.

[0017] Preferably, the outer wall of the outer gear ring is meshedly connected to the gear, and the gear is also meshedly connected to the gear plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, when the circular moving mechanism drives the fork gap processing mechanism to move along the sliding groove of the moving part, the end of the fork gap processing mechanism away from the circular moving mechanism is limited by the wavy inner wall of the wave groove, forcing the processing end to generate S-shaped shaking during the movement. This shaking is converted into high-frequency reciprocating motion through the mechanical structure, which can accurately penetrate into the tooth-shaped gaps and grooves of the plastic fork mold and efficiently hook out stubborn residual material scraps. Compared with traditional manual cleaning or single-direction scraping methods, this structure utilizes the annular layout of the ring frame and the limiting characteristics of the wave groove to achieve synchronous coupling of the cleaning action and the movement of the mechanism, avoiding additional cleaning steps and time consumption, improving the efficiency of cleaning mold residues, and thus shortening the overall mold change cycle to meet the production needs of rapid mold change.

[0020] 2. The triangular tip structure of the bent end of the steel wire in the present invention can be accurately inserted into complex areas such as the serrated gaps and LOGO grooves of the plastic fork mold, and its sharp edge can effectively hook stubborn residual material scraps; and the stable triangular configuration can maintain rigidity during the shaking process, avoiding the attenuation of the hooking force due to deformation. Through the combined effect of high-frequency shaking and precise hooking, the residual material scraps that are difficult to remove in traditional cleaning can be efficiently peeled off.

[0021] 3. The present invention converts the circular motion of the circular movement mechanism into lateral adaptive adjustment of the steel wire through the linkage limitation of the expansion groove and the limiting ball rod, so that the triangular bending end can actively "follow" the contour changes of the forked end, and residual material chips of different depths and widths can be removed without manual adjustment. This solves the problem of blind spots in cleaning caused by the complex structure of the forked end in traditional cleaning, further shortens the targeted cleaning time before mold change, and improves the overall mold change efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of one side of the present invention.

[0023] Figure 2 It is a schematic diagram of the overall structure of the other side of the present invention.

[0024] Figure 3 It is a schematic diagram of the disassembled structure of the upper mold, lower mold and ring frame of the injection molding machine of the present invention.

[0025] Figure 4 It is a schematic structural diagram of the plastic fork mold of the present invention.

[0026] Figure 5 It is a structural schematic diagram of the mounting frame, ring frame and fork gap processing mechanism of the present invention.

[0027] Figure 6 It is a side structural schematic diagram of the ring frame of the present invention.

[0028] Figure 7 It is a schematic diagram of the disassembled structure of the mounting part and the moving part of the present invention.

[0029] Figure 8 It is a side structural schematic diagram of the ring frame and ring shift mechanism of the present invention.

[0030] Figure 9 It is a schematic structural diagram of the moving part cross section, the circular movement mechanism and the fork gap processing mechanism of the present invention.

[0031] Figure 10 It is a cross-section diagram of the moving part and the fork gap processing mechanism structure of the present invention.

[0032] Figure 11 It is a schematic diagram of the structure of the slide groove, wave groove, slider, spring and processing block of the present invention.

[0033] Figure 12 Schematic diagram of the processing block structure of the present invention.

[0034] Description of the numbers in the figure:

[0035] 1. Injection molding machine body; 2. Bracket; 3. Lifting mechanism; 4. Mounting frame; 5. Ring frame; 6. Ring shifting mechanism; 7. Fork gap processing mechanism;

[0036] 501, mounting portion; 502, moving portion; 503, slide groove; 504, wave groove; 505, expansion groove;

[0037] 601, motor; 602, output shaft; 603, outer gear ring; 604, gear; 605, gear plate;

[0038] 701, slider; 702, spring; 703, processing block; 704, sliding ball;

[0039] 7031. Shaking part; 7032. Processing part; 7033. Transverse groove; 7034. Sliding shaft; 7035. Steel wire; 7036. Straight end; 7037. Bending end; 7038. Telescopic rod; 7039. Limiting ball rod. DETAILED DESCRIPTION

[0040] like Figures 1 to 12 As shown, the present invention relates to a quick mold change mechanism for an injection molding machine, comprising an injection molding machine body 1, a bracket 2 symmetrically provided on the injection molding machine body 1, the bracket 2 being located between the upper mold and the lower mold of the injection molding machine body 1, a lifting mechanism 3 being provided on the bracket 2, a mounting frame 4 being provided at the output end of the lifting mechanism 3, a ring frame 5 being provided on the mounting frame 4, a ring shifting mechanism 6 being provided on the ring shifting mechanism 6, and a fork gap processing mechanism 7 being provided at the moving end of the ring shifting mechanism 6;

[0041] The ring frame 5 includes a mounting portion 501 and a moving portion 502. The circular moving mechanism 6 is provided on the mounting portion 501. The moving end of the circular moving mechanism 6 is provided on the moving portion 502. The moving portion 502 is provided with annular chute 503 at equal intervals. The fork gap processing mechanism 7 is slidably provided on the chute 503. The inner wall of the chute 503 is symmetrically provided with a wave groove 504. The end of the fork gap processing mechanism 7 away from the circular moving mechanism 6 is slidably inserted into the wave groove 504.

[0042] When the circular movement mechanism 6 drives the fork gap processing mechanism 7 to move, the processing end of the fork gap processing mechanism 7 is limited by the wave groove 504, so that the processing end shakes in an S shape, hooking out the stubborn residue in the plastic fork injection mold, saving processing time and realizing rapid mold change.

[0043] In the present invention, when the circular movement mechanism 6 drives the fork gap processing mechanism 7 to move along the slide groove 503 of the moving part 502, the end of the fork gap processing mechanism 7 away from the circular movement mechanism 6 is limited by the wavy inner wall of the wave groove 504, forcing the processing end to generate S-shaped vibration during the movement. This vibration is converted into high-frequency reciprocating motion through the mechanical structure, which can accurately penetrate into the tooth-shaped gaps and grooves of the plastic fork mold and efficiently hook out stubborn residual material chips. Compared with traditional manual cleaning or single-direction scraping methods, this structure utilizes the annular layout of the ring frame 5 and the limiting characteristics of the wave groove 504 to achieve synchronous coupling of the cleaning action and the movement of the mechanism, avoiding additional cleaning processes and time consumption, improving the efficiency of mold residue cleaning, and thus shortening the overall mold change cycle to meet the production needs of rapid mold change.

[0044] In an embodiment of the present invention, the fork gap processing mechanism 7 includes a slider 701, a spring 702 and a processing block 703. One end of the slider 701 is connected to the moving end of the circular movement mechanism 6, and the other end of the slider 701 is slidably arranged on the slide groove 503. The spring 702 is connected to the slider 701, and the processing block 703 is connected to the end of the spring 702 away from the slider 701.

[0045] In the embodiment of the present invention, a sliding ball 704 is symmetrically rotatably provided on the processing block 703 , and the sliding ball 704 is slidably disposed in the wave groove 504 at one end away from the processing block 703 .

[0046] In the present invention, when the circular movement mechanism 6 drives the slider 701 along the slide groove 503, the spring 702 drives the processing block 703 to move synchronously, and the sliding ball 704 on the processing block 703 always contacts the inner wall of the wave groove 504. Because the wave groove 504 has an S-shaped undulating structure, the sliding ball 704 forces the processing block 703 to vibrate regularly as it rolls within the groove: when the sliding ball 704 rolls along the convex section of the wave groove 504, the processing block 703 deflects toward the mold; when it rolls along the concave section, it returns to its original position away from the mold, thus forming a high-frequency reciprocating S-shaped vibration trajectory.

[0047] In an embodiment of the present invention, the processing block 703 includes a shaking part 7031, a processing part 7032, a transverse groove 7033, a sliding shaft 7034 and a steel wire 7035. The shaking part 7031 is connected to the end of the spring 702 away from the slider 701, the processing part 7032 is connected to the end of the shaking part 7031 away from the spring 702, the transverse groove 7033 is linearly and evenly spaced at the end of the processing part 7032 away from the shaking part 7031, the sliding shaft 7034 is movably inserted in the transverse groove 7033, and the steel wire 7035 is connected to the end of the sliding shaft 7034 away from the transverse groove 7033.

[0048] In the present invention, when the circular movement mechanism 6 drives the slider 701 along the slide groove 503, the spring 702 drives the processing block 703 to move synchronously, and the rolling of the sliding ball 704 within the wave groove 504 forces the processing block 703 to produce S-shaped vibrations. At this time, the vibration unit 7031 couples the elastic vibration of the spring 702 with the trajectory vibration of the sliding ball 704, and transmits this to the sliding shaft 7034 within the transverse groove 7033 through the processing unit 7032, causing the steel wire 7035 to produce high-frequency reciprocating vibrations. When the steel wire 7035 is inserted into the gap, the high-frequency vibration can loosen stubborn residues.

[0049] In an embodiment of the present invention, the steel wire 7035 includes a straight end 7036 and a bent end 7037. The straight end 7036 is connected to the sliding shaft 7034, and the bent end 7037 is connected to the end of the straight end 7036 away from the sliding shaft 7034. The bent end 7037 is triangular in shape.

[0050] The triangular tip structure of the bent end 7037 of the steel wire 7035 in the present invention can be accurately inserted into complex areas such as the serrated gaps and LOGO grooves of the plastic fork mold, and its sharp edge can effectively hook stubborn residual material chips; and the stable configuration of the triangle can maintain rigidity during the shaking process, avoiding the attenuation of the hooking force due to deformation. Through the combined effect of high-frequency shaking and precise hooking, the residual material chips that are difficult to remove in traditional cleaning can be efficiently peeled off.

[0051] As another embodiment of the present invention, a plurality of groups of expansion grooves 505 are provided at one end of the movable portion 502 away from the mounting portion 501. Each group of expansion grooves 505 are symmetrically provided at both ends of the slide groove 503. The processing block 703 is also movably connected to the expansion groove 505. The expansion groove 505 is bent at one end close to the outer wall of the ring frame 5.

[0052] As another embodiment of the present invention, the processing block 703 also includes a telescopic rod 7038 and a limiting ball rod 7039. The telescopic rod 7038 is connected to one end of the sliding shaft 7034 away from the transverse groove 7033. One end of the limiting ball rod 7039 is rotatably connected to the telescopic rod 7038, and the other end of the limiting ball rod 7039 is rotatably connected to the expansion groove 505.

[0053] As another embodiment of the present invention, when the circular movement mechanism 6 drives the fork gap processing mechanism 7 to move, the processing block 703 causes the sliding shaft 7034 and the steel wire 7035 to shake due to the limitation of the sliding ball 704 and the wave groove 504, and the sliding shaft 7034 is slidingly limited in the expansion groove 505 through the telescopic rod 7038 and the limiting ball rod 7039. Therefore, when the processing block 703 drives the sliding shaft 7034 to move to the bending end of the expansion groove 505, the limiting ball rod 7039 pulls the telescopic rod 7038 to drive the sliding shaft 7034 and the steel wire 7035 to move on the transverse groove 7033, which is suitable for cleaning the forked end of the plastic fork mold.

[0054] In the present invention, when the circular movement mechanism 6 drives the fork gap processing mechanism 7 to move along the slide groove 503, the sliding ball 704 on the processing block 703 rolls within the wave groove 504, causing the sliding shaft 7034 and the steel wire 7035 to generate high-frequency vibration. At the same time, the sliding shaft 7034 is connected to the limiting ball rod 7039 via the telescopic rod 7038, and the other end of the limiting ball rod 7039 slides within the distance expansion groove 505.

[0055] When the processing block 703 moves to the bent end of the expansion slot 505, the bent shape of the expansion slot 505 forces the limiting ball rod 7039 to rotate, pulling the slide shaft 7034 laterally within the transverse slot 7033 through the telescopic rod 7038. The bent structure of the expansion slot 505 acts as a trajectory guide, so that the displacement of the slide shaft 7034 matches the geometric features of the mold bifurcated end;

[0056] The telescopic rod 7038 can adjust its length adaptively to cushion the impact force when the limiting ball rod 7039 rotates, thus avoiding hard pulling;

[0057] The transverse groove 7033 provides a movable space for the sliding shaft 7034, so that the bent end 7037 of the steel wire 7035 can expand or contract laterally to accurately fit the gap width of the forked end of the plastic fork mold.

[0058] The present invention converts the circular motion of the circular movement mechanism 6 into lateral adaptive adjustment of the steel wire 7035 through the linkage limitation of the expansion groove 505 and the limiting ball rod 7039, so that the triangular bending end 7037 can actively "follow" the contour changes of the forked end, and can remove residual material chips of different depths and widths without manual adjustment, thereby solving the problem of blind spots in cleaning caused by the complex structure of the forked end in traditional cleaning, further shortening the targeted cleaning time before mold change, and improving the overall mold change efficiency.

[0059] As another embodiment of the present invention, the circular movement mechanism 6 includes a motor 601, an output shaft 602, an outer gear ring 603, a gear 604 and a gear plate 605. The motor 601 is fixed in the mounting portion 501, the output shaft 602 is connected to the output end of the motor 601, the outer gear ring 603 is rotatably arranged on the mounting portion 501 and connected to the output shaft 602, the gear 604 is rotatably arranged on the mounting portion 501 in a ring shape with equal intervals, and the gear plate 605 is fixedly connected to the slider 701.

[0060] As another embodiment of the present invention, the outer wall of the outer gear ring 603 is meshedly connected to the gear 604 , and the gear 604 is further meshedly connected to the gear plate 605 .

[0061] In the present invention, when the motor 601 is started, the output shaft 602 drives the outer gear ring 603 to rotate about the axis of the mounting portion 501. The outer wall of the outer gear ring 603 meshes with the annularly arranged gears 604, transmitting the rotational motion to each gear 604. Because the gears 604 simultaneously mesh with the toothed plate 605 fixed to the slider 701, the rotation of the gear 604 pushes the toothed plate 605 to move linearly along the direction of the slide 503, thereby driving the slider 701 and the entire fork gap processing mechanism 7 to translate along the circumferential direction of the ring frame 5.

[0062] Compared with traditional belt drive or cylinder drive, this structure utilizes the high precision and constant transmission ratio characteristics of gear transmission to accurately couple the power output of the circular movement mechanism 6 with the motion trajectory of the fork gap processing mechanism 7, ensuring the efficiency and reliability of residue cleaning during rapid mold change from the power source level.

[0063] Working Principle: This embodiment provides a quick mold-changing mechanism for an injection molding machine. During operation, the lifting mechanism 3 first adjusts the height of the mounting frame 4 to position the ring frame 5 within the toothed gap area of ​​the plastic fork mold. The motor 601 of the circular movement mechanism 6 then drives the output shaft 602 to rotate the outer gear ring 603. The meshing transmission between the gear 604 and the tooth plate 605 propels the slider 701 to perform a circular translation along the slide groove 503 of the moving portion 502.

[0064] During this process, slider 701 drives processing block 703 to move synchronously via spring 702. Sliding ball 704 on processing block 703, restrained by the S-shaped inner wall of wave groove 504, forces processing block 703 to produce a high-frequency S-shaped vibration. This vibration is transmitted to processing unit 7032 via vibration unit 7031, causing slide shaft 7034 to drive steel wire 7035 to perform a high-frequency reciprocating motion. The triangular tip of its bent end 7037 precisely inserts into the mold gap, removing stubborn residue.

[0065] When slider 701 drives processing block 703 to the bent end of expansion slot 505, limiting ball rod 7039 pulls telescopic rod 7038, causing slide shaft 7034 to shift laterally within transverse slot 7033. This in turn drives steel wire 7035 to adaptively adjust its position, precisely fitting the contours of the fork mold's bifurcated end and completing the cleaning of complex areas. This entire process is an integrated operation, requiring no manual intervention, significantly reducing mold cleaning time and enabling rapid mold changes.

[0066] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A quick mold change mechanism for an injection molding machine, characterized in that: The invention comprises an injection molding machine body (1), wherein a bracket (2) is symmetrically provided on the injection molding machine body (1), wherein the bracket (2) is located between the upper mold and the lower mold of the injection molding machine body (1), wherein a lifting mechanism (3) is provided on the bracket (2), wherein an output end of the lifting mechanism (3) is provided with a mounting frame (4), wherein a ring frame (5) is provided on the mounting frame (4), wherein a circular movement mechanism (6) is provided on the circular movement mechanism (6), and wherein a fork gap processing mechanism (7) is provided at a moving end of the circular movement mechanism (6); The ring frame (5) includes a mounting portion (501) and a moving portion (502), the ring moving mechanism (6) is arranged on the mounting portion (501), the moving end of the ring moving mechanism (6) is arranged on the moving portion (502), the moving portion (502) is provided with a ring-shaped sliding groove (503) at equal intervals, the fork gap processing mechanism (7) is slidably arranged on the sliding groove (503), the inner wall of the sliding groove (503) is symmetrically provided with a wave groove (504), and the fork gap processing mechanism (7) is slidably inserted into the wave groove (504) at one end away from the ring moving mechanism (6); When the circular movement mechanism (6) drives the fork gap processing mechanism (7) to move, the processing end of the fork gap processing mechanism (7) is limited by the wave groove (504), so that the processing end shakes in an S shape, and the stubborn residue in the plastic fork injection mold is hooked out, thereby saving processing time and realizing rapid mold change; The fork gap processing mechanism (7) includes a slider (701), a spring (702) and a processing block (703), one end of the slider (701) is connected to the moving end of the circular movement mechanism (6), the other end of the slider (701) is slidably arranged on the slide groove (503), the spring (702) is connected to the slider (701), and the processing block (703) is connected to the end of the spring (702) away from the slider (701).

2. The quick mold change mechanism of an injection molding machine according to claim 1, characterized in that: A sliding ball (704) is also symmetrically rotated on the processing block (703), and the sliding ball (704) is slidably arranged in the wave groove (504) at one end away from the processing block (703).

3. The quick mold change mechanism of an injection molding machine according to claim 2, characterized in that: The processing block (703) includes a shaking part (7031), a processing part (7032), a transverse groove (7033), a sliding shaft (7034) and a steel wire (7035), wherein the shaking part (7031) is connected to the end of the spring (702) away from the slider (701), the processing part (7032) is connected to the end of the shaking part (7031) away from the spring (702), the transverse groove (7033) is linearly arranged at equal intervals at the end of the processing part (7032) away from the shaking part (7031), the sliding shaft (7034) is movably inserted in the transverse groove (7033), and the steel wire (7035) is connected to the end of the sliding shaft (7034) away from the transverse groove (7033).

4. A quick mold change mechanism for an injection molding machine according to claim 3, characterized in that: The steel wire (7035) includes a straight end (7036) and a bent end (7037), wherein the straight end (7036) is connected to the sliding shaft (7034), and the bent end (7037) is connected to the end of the straight end (7036) away from the sliding shaft (7034), and the bent end (7037) is triangular in shape.

5. The quick mold change mechanism of an injection molding machine according to claim 4, characterized in that: The movable portion (502) is provided with a plurality of groups of expansion grooves (505) at one end away from the mounting portion (501), and each group of the expansion grooves (505) is symmetrically provided at both ends of the slide groove (503). The processing block (703) is also movably connected to the expansion grooves (505), and the expansion grooves (505) are bent at one end close to the outer wall of the ring frame (5).

6. The quick mold change mechanism of an injection molding machine according to claim 5, characterized in that: The processing block (703) further includes a telescopic rod (7038) and a limiting ball rod (7039), wherein the telescopic rod (7038) is connected to one end of the sliding shaft (7034) away from the transverse displacement slot (7033), one end of the limiting ball rod (7039) is rotatably connected to the telescopic rod (7038), and the other end of the limiting ball rod (7039) is rotatably connected to the distance expansion slot (505).

7. The quick mold change mechanism of an injection molding machine according to claim 6, characterized in that: When the circular movement mechanism (6) drives the fork gap processing mechanism (7) to move, the processing block (703) causes the sliding shaft (7034) and the steel wire (7035) to vibrate due to the limitation of the sliding ball (704) and the wave groove (504), and the sliding shaft (7034) is slidably limited in the expansion groove (505) through the telescopic rod (7038) and the limiting ball rod (7039). Therefore, when the processing block (703) drives the sliding shaft (7034) to move to the bending end of the expansion groove (505), the limiting ball rod (7039) pulls the telescopic rod (7038) to drive the sliding shaft (7034) and the steel wire (7035) to move on the transverse movement groove (7033), so as to clean the bifurcated end of the plastic fork mold.

8. The quick mold change mechanism of an injection molding machine according to claim 1, characterized in that: The circular shift mechanism (6) comprises a motor (601), an output shaft (602), an outer gear ring (603), a gear (604) and a tooth plate (605); the motor (601) is fixedly arranged in the mounting portion (501); the output shaft (602) is connected to the output end of the motor (601); the outer gear ring (603) is rotatably arranged on the mounting portion (501) and connected to the output shaft (602); the gear (604) is rotatably arranged on the mounting portion (501) at equal intervals in a ring shape; and the tooth plate (605) is fixedly connected to the slider (701).

9. The quick mold change mechanism of an injection molding machine according to claim 8, characterized in that: The outer wall of the outer gear ring (603) is meshedly connected to the gear (604), and the gear (604) is also meshedly connected to the gear plate (605).

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