Positioning mechanism of plastic bag slitting machine

Abstract

The utility model discloses a positioning mechanism of plastic bag slitting machine belongs to the field of plastic bag slitting machine, two side frames are connected with movable rod through movable frame, and the upper end of movable rod is connected with a plurality of limit type positioning frame, and the connecting bearing piece is equipped between limit type positioning frame and movable rod, and then realizes the free rotation of limit type positioning frame, and also slides along movable rod and then adjusts the position of limit type positioning frame, makes it adapt to the slitting disc of slitting roller assembly, limit type positioning frame is connected with movable sleeve through fastening bolt. Movable rod and limit frame design allow equipment to be flexible and adapt to different specifications of plastic bags. Through movable rod sliding, limit frame rotation and positioning sleeve adjustment, ensure that plastic bag slitting is stable, avoid the deviation caused by specification difference, improve equipment applicability and flexibility. Limit frame is connected with movable sleeve through fastening bolt, and positioning sleeve is arranged between slitting disc, and the plastic bag slitting strip is pressed tightly, and deviation is prevented, and slitting precision and stability are improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic bag slitting machines, and in particular to a positioning mechanism for a plastic bag slitting machine. Background Technology

[0002] A plastic film slitting machine is a specialized device for cutting rolls of plastic film and other raw materials to a fixed length, adapting to the diverse size requirements of industries such as packaging, printing, and construction. The equipment mainly consists of an unwinding mechanism, a cutting mechanism, a winding mechanism, functional rollers, and tension control, web guiding control, and detection devices. Its working principle is as follows: The raw material is released from the unwinding mechanism and undergoes pre-treatment steps such as flattening, tension detection, energizing, and web guiding before entering the cutting mechanism for fixed-length cutting. After cutting, the finished product is wound up by the winding mechanism.

[0003] During the actual operation of a plastic film slitting machine, due to the thinness and flexibility of the plastic film, it is easily affected by various factors such as tension fluctuations, airflow, and the precision of the cutting blades when being cut by the slitting rollers, leading to offset. This offset not only reduces cutting accuracy but may also cause inconsistent dimensions of the cut plastic film, thus affecting its subsequent use and processing.

[0004] The positioning challenge mainly lies in controlling the position of the plastic film during transport and cutting. Due to the thin and flexible nature of plastic film, it is difficult to maintain a stable position and shape during transport, which poses a significant challenge to the positioning system of the slitting machine. Inaccurate positioning will lead to deviations in the cutting position, thereby affecting cutting quality and efficiency. Utility Model Content

[0005] The main objective of this invention is to provide a positioning mechanism for a plastic bag slitting machine, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A positioning mechanism for a plastic bag slitting machine includes a base, a support, a material cylinder, a transmission assembly, a reducer, a servo motor, side frames, and a slitting roller assembly. The base and the support are respectively installed on the bottom and side wall of the side frames. The slitting roller assembly is connected between the two side frames. The slitting roller assembly is connected to the reducer through the transmission assembly. The servo motor is connected to the reducer. The servo motor and its transmission system enable the slitting roller assembly to perform slitting operations on the plastic bags.

[0008] The two side frames are connected to a movable rod via a movable frame. The upper end of the movable rod is connected to a plurality of limiting positioning frames, and a connecting bearing is provided between the limiting positioning frames and the movable rod, thereby enabling the free rotation of the limiting positioning frames and allowing them to slide along the movable rod to adjust the position of the limiting positioning frames so as to adapt them to the slitting disc of the slitting roller assembly.

[0009] The limiting positioning frame is connected to a movable sleeve by fastening bolts. The free end of the movable sleeve is provided with a positioning sleeve. The positioning sleeve is placed between two adjacent slitting discs of the slitting roller assembly to press down the plastic bag slitting strip and prevent excessive displacement.

[0010] In a further optional embodiment, the side wall of the positioning sleeve is provided with a through hole, and a counterweight sleeve is inserted and connected into the hole of the through hole. The side wall of the counterweight sleeve is provided with a thread and is connected to the positioning sleeve through the thread. The total weight of the positioning sleeve pressing down on the plastic bag cutting strip is changed by the counterweight sleeve, so that it can be adapted to plastic bags of different specifications.

[0011] In a further optional embodiment, a sliding groove is provided at the upper end of the side frame, and a movable bearing assembly is limited and connected in the sliding groove. The movable bearing assembly is connected to one of the slitting rollers. A sealing strip is provided at the opening of the sliding groove, and an adjusting component is connected to the sealing strip. The adjusting component is connected to the movable bearing assembly through a T-key and a T-hole.

[0012] In a further optional embodiment, the adjusting component comprises an adjusting bolt, an anti-slip washer, and a T-key. The T-key is located at the bottom of the adjusting bolt, and the anti-slip washer is fitted onto the bolt head of the adjusting bolt. The movable bearing assembly includes a limiting bearing housing, a bearing, and a T-hole. The bearing is installed in the limiting bearing housing, and the T-hole is located at the top of the limiting bearing housing and is adapted to the T-key. The adjusting bolt is threadedly connected to the sealing strip on the side frame.

[0013] In a further alternative, the movable frame is constrained to the side frame by a pivot and a sleeve, the movable rod is connected to the movable frame by a pivot, and the bearing seat of the connecting bearing component is connected to the limiting positioning frame by bolts. The fastening bolt is inserted into the free end of the limiting positioning frame and threadedly connected to it.

[0014] In a further alternative, the cross-section of the movable sleeve and the positioning sleeve is designed in the shape of an eyeglass frame, the surface of the positioning sleeve is smooth, and the movable sleeve is connected to the fastening bolt by a thread.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The design of the movable rod and the limiting positioning frame allows the equipment to flexibly adapt to plastic bags of different sizes. Through the sliding of the movable rod on the side frame, the free rotation of the limiting positioning frame, and the flexible adjustment of the positioning sleeve in the movable sleeve, the equipment can ensure that the plastic bags remain stable during the cutting process and will not shift excessively due to different sizes, thereby improving the applicability and flexibility of the equipment.

[0017] The limiting positioning frame is connected to the movable sleeve via fastening bolts. The positioning sleeve is placed between the slitting discs of the slitting roller assembly, pressing down on the plastic bag slitting strips and effectively preventing the plastic bags from shifting during the slitting process. This design not only improves slitting accuracy but also ensures the stability of the slitting effect.

[0018] The counterweight sleeve design allows users to adjust the clamping force according to the size of the plastic bags, further improving the adaptability and slitting accuracy of the equipment. By changing the position of the counterweight sleeve on the positioning sleeve, users can easily adjust the total weight pressing down on the plastic bag slitting strip, ensuring optimal slitting results for plastic bags of different sizes.

[0019] The adjustable design of the movable bearing assembly allows users to easily adjust the position of the slitting roller assembly to accommodate different sizes of plastic bags. This design not only improves the flexibility of the equipment but also reduces the difficulty of operation, enabling users to complete slitting tasks more easily. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a diagram showing the overall structure of the present invention;

[0022] Figure 3 This is a side view of the overall structure of this utility model;

[0023] Figure 4 The diagram shows the slitting roller assembly, movable rod, and limiting positioning frame of this utility model.

[0024] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0025] In the diagram: 1. Base; 2. Support; 3. Material cylinder; 4. Transmission assembly; 5. Reducer; 6. Servo motor; 7. Side frame; 8. Adjusting component; 9. Movable bearing assembly; 10. Slitting roller assembly; 11. Movable frame; 12. Movable rod; 13. Limiting positioning frame; 14. Connecting bearing component; 15. Fastening bolt; 16. Movable sleeve; 17. Positioning sleeve; 18. Perforation; 19. Counterweight sleeve. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figure 1 - Figure 5 As shown, a positioning mechanism for a plastic bag slitting machine includes a base 1, a support 2, a material cylinder 3, a transmission assembly 4, a reducer 5, a servo motor 6, side frames 7, and a slitting roller assembly 10. The base 1 and support 2 are respectively installed on the bottom and side wall of the side frames 7 to ensure the stability and reliability of the equipment. The slitting roller assembly 10 is connected between the two side frames 7 and is connected to the reducer 5 via the transmission assembly 4, thereby realizing the slitting operation of the plastic bags. The servo motor 6 is connected to the reducer 5, and through the servo motor 6 and its transmission system, the movement of the slitting roller assembly 10 can be precisely controlled, thereby achieving precise slitting of the plastic bags.

[0028] Two side frames 7 are connected to movable rods 12 via movable frames 11. Multiple limiting positioning frames 13 are connected to the upper ends of the movable rods 12. A connecting bearing 14 is provided between the limiting positioning frames 13 and the movable rods 12, allowing the limiting positioning frames 13 to rotate freely and slide along the movable rods 12, thereby adjusting their position to fit the slitting disc of the slitting roller assembly 10. This design can flexibly adapt to different sizes of plastic bags, improving the applicability and flexibility of the equipment.

[0029] The limiting positioning frame 13 is connected to a movable sleeve 16 via fastening bolts 15. The free end of the movable sleeve 16 is provided with a positioning sleeve 17. The positioning sleeve 17 is placed between two adjacent slitting discs of the slitting roller assembly 10, pressing down the plastic bag slitting strip to prevent excessive displacement. This design can ensure the stability of the plastic bag during the slitting process and improve the slitting accuracy.

[0030] The positioning sleeve 17 has a through hole 18 on its side wall, into which a counterweight sleeve 19 is inserted and connected. The side wall of the counterweight sleeve 19 is threaded and connected to the positioning sleeve 17 via the thread. By adjusting the total weight of the positioning sleeve 17 pressing down on the plastic bag slitting strip, the counterweight sleeve 19 can be adapted to different sizes of plastic bags. This design allows for adjustment of the clamping force according to different sizes of plastic bags, ensuring the slitting effect.

[0031] The upper end of the side frame 7 has a sliding groove, within which a movable bearing assembly 9 is connected and positioned. The movable bearing assembly 9 is connected to one of the slitting rollers. A sealing strip is provided at the opening of the sliding groove, and an adjusting component 8 is connected to the sealing strip. The adjusting component 8 is connected to the movable bearing assembly 9 via a T-key and a T-hole. The adjusting component 8 consists of an adjusting bolt, an anti-slip washer, and a T-key. The T-key is located at the bottom of the adjusting bolt, and the anti-slip washer is fitted onto the bolt head. The movable bearing assembly 9 includes a limiting bearing seat, a bearing, and a T-hole. The bearing is installed in the limiting bearing seat, and the T-hole is located at the top of the limiting bearing seat and is adapted to the T-key. The adjusting bolt is threadedly connected to the sealing strip on the side frame 7. This design allows for easy adjustment of the position of the movable bearing assembly 9, thereby adjusting the position of the slitting roller assembly 10 to accommodate different sizes of plastic bags.

[0032] The movable frame 11 is secured to the side frame 7 by a pivot and a clamp. The movable rod 12 is connected to the movable frame 11 by a pivot. The bearing seat of the connecting bearing 14 is connected to the limiting positioning frame 13 by bolts. The fastening bolt 15 is inserted into the free end of the limiting positioning frame 13 and threadedly connected to it. This design ensures a stable connection between the movable rod 12 and the limiting positioning frame 13, improving the reliability of the equipment.

[0033] The movable sleeve 16 and the positioning sleeve 17 have a cross-section designed like an eyeglass frame. The positioning sleeve 17 has a smooth surface. The movable sleeve 16 is connected to the fastening bolt 15 by threads. This design ensures the stability and flexibility of the positioning sleeve 17 within the movable sleeve 16, improving cutting accuracy.

[0034] The plastic bag is placed in the material cylinder 3, and the servo motor 6 is started. The servo motor 6 drives the transmission component 4 through the reducer 5, which in turn drives the slitting roller assembly 10 to start rotating. The plastic bag enters the slitting area of ​​the slitting roller assembly 10 under the guidance of the material cylinder 3. At this time, the limiting positioning frame 13 slides and rotates appropriately on the side frame 7 through the movable rod 12, ensuring that the positioning sleeve 17 on the limiting positioning frame 13 can be accurately placed between two adjacent slitting discs of the slitting roller assembly 10, pressing down the plastic bag slitting strip and preventing it from shifting excessively during the slitting process. At the same time, by adjusting the position of the counterweight sleeve 19 on the positioning sleeve 17, the total weight pressing down on the plastic bag slitting strip can be changed to accommodate plastic bags of different sizes.

[0035] When the position of the slitting roller assembly 10 needs to be adjusted to accommodate plastic bags of different sizes, the position of the movable bearing assembly 9 can be adjusted via the adjusting member 8. First, loosen the adjusting bolt on the seal to allow the movable bearing assembly 9 to move freely within the sliding groove. Then, push or pull the movable bearing assembly 9 using the adjusting bolt as needed until it reaches the appropriate position. Finally, tighten the adjusting bolt to ensure the movable bearing assembly 9 is stably fixed in the new position. Simultaneously, the slitting effect of the plastic bags can be further fine-tuned by adjusting the position and rotation angle of the limiting positioning frame 13 on the movable rod 12, and the position of the counterweight sleeve 19 on the positioning sleeve 17, ensuring slitting accuracy and stability.

[0036] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0037] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A positioning mechanism for a plastic bag slitting machine, comprising a base (1), a bracket (2), a material cylinder (3), a transmission assembly (4), a reducer (5), a servo motor (6), a side frame (7), and a slitting roller assembly (10), wherein the base (1) and the bracket (2) are respectively installed on the bottom and side wall of the side frame (7), the slitting roller assembly (10) is connected between the two side frames (7), the slitting roller assembly (10) is connected to the reducer (5) through the transmission assembly (4), and the servo motor (6) is connected to the reducer (5), wherein the slitting roller assembly (10) performs slitting operation on the plastic bag through the servo motor (6) and its transmission system, characterized in that: The two side frames (7) are connected to a movable rod (12) via a movable frame (11). The upper end of the movable rod (12) is connected to a plurality of limiting positioning frames (13), and a connecting bearing (14) is provided between the limiting positioning frame (13) and the movable rod (12), thereby enabling the limiting positioning frame (13) to rotate freely and slide along the movable rod (12) to adjust the position of the limiting positioning frame (13) so that it can be adapted to the slitting disc of the slitting roller assembly (10). The limiting positioning frame (13) is connected to a movable sleeve (16) by fastening bolts (15). The free end of the movable sleeve (16) is provided with a positioning sleeve (17). The positioning sleeve (17) is placed between two adjacent slitting discs of the slitting roller assembly (10) to press down the plastic bag slitting strip and prevent excessive displacement.

2. The positioning mechanism of a plastic bag slitting machine according to claim 1, characterized in that: The positioning sleeve (17) has a through hole (18) on its side wall. A counterweight sleeve (19) is inserted into the hole (18). The side wall of the counterweight sleeve (19) is threaded and connected to the positioning sleeve (17) through the thread. The counterweight sleeve (19) changes the total weight of the plastic bag cutting strip pressed by the positioning sleeve (17) so that it can be adapted to different sizes of plastic bags.

3. The positioning mechanism of a plastic bag slitting machine according to claim 2, characterized in that: The upper end of the side frame (7) is provided with a sliding groove, and a movable bearing assembly (9) is connected in the sliding groove. The movable bearing assembly (9) is connected to one of the slitting rollers. The groove opening of the sliding groove is provided with a sealing strip, and an adjusting component (8) is connected to the sealing strip. The adjusting component (8) is connected to the movable bearing assembly (9) through a T-key and a T-hole.

4. The positioning mechanism of a plastic bag slitting machine according to claim 3, characterized in that: The adjusting component (8) consists of an adjusting bolt, an anti-slip washer, and a T-key. The T-key is located at the bottom of the adjusting bolt, and the anti-slip washer is fitted onto the bolt head of the adjusting bolt. The movable bearing assembly (9) includes a limiting bearing seat, a bearing, and a T-hole. The bearing is installed in the limiting bearing seat, and the T-hole is located at the top of the limiting bearing seat and is adapted to the T-key. The adjusting bolt is threadedly connected to the sealing strip on the side frame (7).

5. The positioning mechanism of a plastic bag slitting machine according to claim 4, characterized in that: The movable frame (11) is restricted to the side frame (7) by a rotating shaft and a sleeve. The movable rod (12) is connected to the movable frame (11) by a rotating shaft. The bearing seat of the connecting bearing component (14) is connected to the limiting positioning frame (13) by bolts. The fastening bolt (15) is inserted into the free end of the limiting positioning frame (13) and threadedly connected to it.

6. The positioning mechanism of a plastic bag slitting machine according to claim 5, characterized in that: The cross-section of the movable sleeve (16) and the positioning sleeve (17) is designed like an eyeglass frame. The surface of the positioning sleeve (17) is smooth. The movable sleeve (16) is connected to the fastening bolt (15) by a thread.

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