A packaging machine and film roll automatic change mechanism

By designing a packaging machine and an automatic film roll changing mechanism, the automatic changing of film rolls is achieved by using gripping components and a stretching mechanism, which solves the problem of complex manual changing in the existing technology and improves the operating efficiency of the packaging machine.

CN224511627UActive Publication Date: 2026-07-17CHAINT CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHAINT CORP
Filing Date
2025-08-11
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing ring-type stretch film packaging machines cannot automatically change film rolls, requiring manual operation, which makes the replacement process complicated and unsuitable for high-speed operations.

Method used

A packaging machine and an automatic film roll changing mechanism were designed, including a gripping component, a lifting frame, a stretching mechanism, and an automatic film feeding mechanism. The automatic changing of the film roll is achieved through the cooperation of the top core shaft and the rotating block of the gripping component. The design of the stretching mechanism and the film winding box ensures that the film roll is wound and unfolded synchronously during the changing process.

Benefits of technology

It enables automatic film roll changing, simplifies the operation process, improves the operating efficiency of the packaging machine, and adapts to the needs of high-frequency operations.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224511627U_ABST
Patent Text Reader

Abstract

The utility model relates to packing machine technical field, specifically disclose a kind of packing machine and film roll automatic replacement mechanism, comprising: rack, the rack is slidably connected with lifting frame, the bottom of the rack is equipped with lifting mechanism for making lifting frame lift;Lifting frame is installed with ring body, the ring body is slidably connected with film placing rack, film placing rack is also equipped with stretching mechanism;Grabbing component, the grabbing component is installed on film placing rack;Film roll loading and unloading component, the film roll loading and unloading component includes upper film piece, lower film piece and film clamping rod;The utility model is through the different position of grabbing component in top core shaft and rotating block, cooperate the setting of upper film piece and lower film piece, when guide rod and top block contact, and make push rod shrink and move up, film roll shaft core falls off to storage rod, complete film stripping;When grabbing component is pressed in film roll shaft core and moves to the inside of fixed cylinder, rotating block will open, and film roll is placed on the load of rotating block, complete automatic film replacement.
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Claims

1. A packaging machine and film roll automatic change mechanism, characterized by, include: A frame (1) is slidably connected to a lifting frame (2), and a lifting mechanism (3) for raising and lowering the lifting frame (2) is installed at the bottom of the frame (1). The lifting frame (2) is equipped with a ring (13), and a film-laying frame (12) is slidably connected to the ring (13). The film-laying frame (12) is also equipped with a tensioning mechanism (8). The lifting frame (2) is also equipped with a film clamping mechanism (10); A gripping component (5) is mounted on a film-laying frame (12). The gripping component (5) includes a plug rod (51), a top core shaft (52), a snap-fit ​​mechanism (54), and a first return spring (53). The membrane roll loading and unloading component (6) includes an upper membrane component (61), a lower membrane component (62), and a membrane clamping rod (63); The plug rod (51) has a first movable hole (511), a spring hole (513) and a limiting hole (512) with gradually increasing diameter from top to bottom, and the first reset spring (53) is installed in the spring hole (513); The top core shaft (52) includes, from top to bottom, a movable rod (521), a limiting block (522) and a push rod (523), and the movable rod (521) is inserted into the first return spring (53) and the first movable hole (511), and the limiting block (522) is inserted into the limiting hole (512). The snap-fit ​​mechanism (54) includes a snap-fit ​​block (547) installed at the bottom of the plug rod (51). The snap-fit ​​block (547) has a second movable hole (541) for the push rod (523) to move through. The diameter of the second movable hole (541) is smaller than the outer diameter of the limiting block (522). The bottom of the snap-fit ​​block (547) is provided with a mounting groove (542) communicating with the second movable hole (541). Rotating blocks (543) are rotatably connected to the inner walls on both sides of the mounting groove (542). Fitting grooves (546) adapted to the rotating blocks (543) are provided at both ends of the mounting groove (542). The two rotating blocks (543) are connected by a tension spring (545). An expansion hole (544) adapted to the two rotating blocks (543) and the tension spring (545) is formed between them. The push rod (523) is inserted into the expansion hole (544), and the rotating block (543) is in a horizontal state under the interaction of the push rod (523) and the tension spring (545). At this time, the rotating block (543) protrudes from the edge of the snap-fit ​​block (547) to form a bearing part (5431). The rotating block (543) is circular on the top side near the push rod (523).

2. The packaging machine and automatic film roll changing mechanism according to claim 1, characterized in that: The upper film component (61) includes a fixed cylinder (611) and a movable cylinder (612). The diameter of the movable cylinder (612) is smaller than the inner diameter of the film roll core, and the movable cylinder (612) is movably inserted into the fixed cylinder (611). A second return spring is installed between the bottom of the movable cylinder (612) and the bottom of the inner wall of the fixed cylinder (611). A bearing ring (613) is fixedly connected to the top of the fixed cylinder (611). The bearing ring (613) and the surface of the movable cylinder (612) form a rotating cavity (614) for the rotation of the rotating block (543). The lower film component (62) includes a storage rod (621), and a top block (622) is fixedly connected to the top of the storage rod (621).

3. A packaging machine and film roll automatic change mechanism according to claim 1, characterized in that: When the rotating block (543) is horizontal, the bottom of the side that contacts the push rod (523) is provided as a pushing part (5432).

4. The packaging machine and film roll automatic changing mechanism according to claim 1, characterized in that: The bottom of the push rod (523) is fixedly connected to a guide rod (524). The cross-section of the guide rod (524) is smaller than that of the push rod (523), and a guide slope is provided between the guide rod (524) and the push rod (523).

5. The packaging machine and automatic film roll changing mechanism according to claim 1, characterized in that: The insertion rod (51) has an installation ring groove (514) at one end near the film placement frame (12). A pressure block (515) and a compression spring (516) are installed in the installation ring groove (514) and are movably sleeved on the insertion rod (51). The compression spring (516) is installed between the top of the installation ring groove (514) and the top of the pressure block (515). The length of the distance a (517) between the bottom of the mounting ring groove (514) and the bearing portion (5431) of the edge of the protruding snap block (547) is less than the length of the film roll, and the length of the movement of the pressure block (515) in the mounting ring groove (514) plus the distance a (517) is greater than the height of the film roll.

6. A packaging machine and film roll automatic change mechanism according to claim 2, characterized in that: It also includes an automatic film feeding mechanism (7), which includes a base (71), a movable base (73) slidably connected to the base (71), and a feeding platform (72) rotatably connected to the movable base (73) via a rotating shaft or a slewing bearing. The film roll loading and unloading components (6) are in several groups and are evenly installed around the edge of the feeding platform (72). The movable base (73) is driven by a linear cylinder (74), and the feeding platform (72) is driven by a motor.

7. A packaging machine and film roll automatic change mechanism according to claim 6, characterized in that: The stretching mechanism (8) includes, in sequence, a guide roller (81), a stretching roller (82), a drive roller (83), and a tension roller (84); The drive roller (83) and the stretching roller (82) are connected by gear sets (85) of different sizes. The film feeding frame (12) is also equipped with a drive motor (86). The output shaft of the drive motor (86) is connected to the drive roller (83) through a sprocket and a chain.

8. The packaging machine and automatic film roll changing mechanism according to claim 7, characterized in that: The feeding platform (72) also includes a film wrapping box (14) installed on the feeding platform (72). The film wrapping box (14) is equipped with a liftable film wrapping frame (141). The film wrapping frame (141) is provided with several film wrapping plates (142). The bottom of the film wrapping frame (141) is connected to the bottom of the inner wall of the film wrapping box (14) through a controllable telescopic member (143).

9. A packaging machine and film roll automatic change mechanism according to claim 7, characterized in that: The clamping film mechanism (10) is installed inside the lifting frame (2) via a linear sliding mechanism (11); The clamping film mechanism (10) includes a mounting frame (101), and a film arm (102) is rotatably connected to the center of the mounting frame (101) via a rotating shaft. The film arm (102) is equipped with a film-breaking heating wire (106), a constant temperature film plate (107), and a film-pressing cylinder (108). The mounting bracket (101) is also rotatably connected to a film clamping arm (103) and a film blocking arm (104). After the film clamping arm (103), the film blocking arm (104) and the film welding arm (102) are rotated to a vertical state, the film clamping arm (103) and the film blocking arm (104) are respectively welded to the adjacent two sides of the film welding arm (102), and one side of the film blocking arm (104) is set facing the constant temperature film welding plate (107). The mounting bracket (101) is also equipped with three swing cylinders (105), and the three swing cylinders (105) are respectively configured to correspond one-to-one with the clamping arm (103), the blocking arm (104) and the welding arm (102).

10. A packaging machine and film roll automatic change mechanism according to claim 7, characterized in that: It also includes a horizontal conveyor (4) for carrying materials and several corner protection devices (9), the horizontal conveyor (4) being installed inside the frame (1); The corner protector placement device (9) includes a corner protector frame (96) and a placement mechanism, wherein a right-angle corner protector (97) is installed and inserted on the corner protector frame (96); The corner protector placement device (9) includes a rotating base (91), on which a sliding rail is mounted. A robotic arm is slidably connected to the sliding rail via a slider. The robotic arm is driven by a drive cylinder (95) mounted on the sliding rail. The robotic arm includes a right-angle frame (93) and negative pressure suction cups (94) mounted on both sides of the right-angle frame (93). The negative pressure suction cups (94) are connected to a negative pressure system. The corner bracket (96) has an opening on one side facing the first slide rail (92) mechanism.