A transection mechanism

Abstract

The utility model discloses a kind of cross-cut mechanisms, including rack, knife groove roller assembly is installed on rack, the variable-diameter cutter assembly that can be adjusted up and down, variable-diameter cutter assembly includes cutter shaft seat, the sliding shaft that is driven by first motor and moves along length direction is installed in cutter shaft seat, the two sides of cutter shaft seat are installed the cutter assembly that can contract or stretch to two sides, cutter assembly is connected with sliding shaft, cutter shaft seat by several arranged shear type stretch components, the rotation radius of cutter assembly is adjusted by shear type stretch component, different length specifications of packaging bag production can be adapted, variable-diameter cutter assembly synchronous lifting, with knife groove roller assembly accurate cooperation, guarantee cutting stable, the inside of cutter assembly is installed locking plate, gripping mechanism that locking plate is clamped is installed on cutter shaft seat, reaction force generated in cutting instant is transferred to locking plate, effectively inhibit the shrinkage deformation of shear type stretch component due to stress, solve the retraction problem of cutter assembly in cutting process.

Description

Technical Field

[0001] This utility model relates to a production line for packaging bags such as cement bags and chemical bags, and in particular a cross-cutting mechanism. Background Technology

[0002] In the production of packaging bags such as cement bags and chemical bags, paper rolls, as the core raw material, need to be processed into shape through multiple key processes such as gluing, cutting, and bag making. Among them, the cutting process directly determines the dimensional accuracy and production efficiency of the packaging bags, and is an important link affecting product quality and production efficiency.

[0003] In existing technologies, the cutting process typically relies on the rotational motion of a cutting tool mechanism. Its working principle is as follows: the cutter rotates with the mechanism, and after each cut, it must rotate one full revolution back to the initial cutting position before the next cut can be performed. The circumference of the cutter's rotation radius directly corresponds to the length of the packaging bag. However, this traditional cutting tool mechanism has significant technical limitations: on the one hand, because the radius of the cutting tool mechanism is fixed, when producing packaging bags of different sizes, the entire cutting tool mechanism needs to be replaced. This not only increases equipment adjustment time and labor costs but also reduces production flexibility and continuity. On the other hand, due to limitations such as the weight of the cutting tool mechanism and its structural stability, the rotational speed of the cutter cannot be significantly increased, resulting in low efficiency—only one cut can be completed per revolution—which restricts the overall production line's capacity improvement. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a transverse cutting mechanism.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A cross-cutting mechanism includes a frame on which an adjustable variable-diameter blade assembly and a grooved roller assembly that cooperates with the variable-diameter blade assembly are mounted. The variable-diameter blade assembly includes a blade shaft seat, in which a sliding shaft driven by a first motor and moving along the length direction is installed. Cutting blade assemblies that can retract or extend to both sides are mounted on both sides of the blade shaft seat. The cutting blade assemblies are connected to the sliding shaft and the blade shaft seat through a plurality of arranged scissor-type extension assemblies. A locking plate is installed on the inner side of the cutting blade assembly, and a clamping mechanism for clamping the locking plate is mounted on the blade shaft seat.

[0007] The scissor extension assembly includes a first fixed rotating arm, a second fixed rotating arm, a first movable rotating arm, and a second movable rotating arm. The ends of the first fixed rotating arm and the second fixed rotating arm are connected by a fixed shaft and mounted on the cutter shaft seat. The other end of the first fixed rotating arm is mounted on the first movable rotating arm via a first hinge shaft. The other end of the second fixed rotating arm is mounted on the second movable rotating arm via a second hinge shaft. The first movable rotating arm and the second movable rotating arm are connected by a movable shaft and mounted on the slide shaft.

[0008] The first and second rotating arms extend outwards to have mounting portions, and the cutter assembly is mounted on the end of the mounting portion.

[0009] The clamping mechanism includes a mounting base fixedly installed on the cutter shaft seat, a pressure block that is pressed against the cutter shaft seat by a spring sheet assembly is installed in the mounting base, and a locking plate is inserted between the cutter shaft seat and the pressure block.

[0010] The clamping mechanism also includes a pull rail component driven by a cylinder. The pull rail component passes between the mounting base and the pressure block. Guide wheels are mounted on both sides of the pressure block. Inclined portions are provided on both sides of the pressure block corresponding to the guide wheels. The guide wheels abut against the inclined portions.

[0011] The top of the pressure block is provided with several limiting holes, and the spring sheet assembly is installed in the limiting holes by positioning screws. The upper outer side of the positioning screw is fixedly connected to the mounting base by a threaded structure.

[0012] The grooving roller assembly includes a rotating shaft driven by a second motor, with gears installed at both ends of the rotating shaft. Lifting brackets are installed on both sides of the variable diameter cutter assembly, and racks that mesh with the gears are installed on the lifting brackets.

[0013] A non-powered cutting roller is installed on the rotating shaft.

[0014] The lifting support is connected to the frame via a slide rail.

[0015] The beneficial effects of this utility model are as follows: This utility model has an adjustable variable diameter blade assembly and a grooved roller assembly used in conjunction with the variable diameter blade assembly installed on the frame. The variable diameter blade assembly includes a blade shaft seat, in which a sliding shaft driven by a first motor and moving along the length direction is installed. Cutting blade assemblies that can retract or extend to both sides are installed on both sides of the blade shaft seat. The cutting blade assembly is connected to the sliding shaft and the blade shaft seat through several arranged scissor-type extension assemblies. The rotation radius of the cutting blade assembly is adjusted by the scissor-type extension assemblies, which can adapt to the production of packaging bags of different lengths. The variable diameter blade assembly rises and falls synchronously and is precisely matched with the grooved roller assembly to ensure stable cutting. A locking plate is installed on the inner side of the cutting blade assembly, and a clamping mechanism is installed on the blade shaft seat to clamp the locking plate. The reaction force generated at the moment of cutting is transferred to the locking plate, effectively suppressing the shrinkage deformation of the scissor-type extension assembly caused by the force, and solving the problem of the cutting blade assembly retraction during the cutting process. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a structural diagram of the present invention;

[0018] Figure 2 This is a structural diagram of the variable diameter cutter assembly and the cutter groove roller assembly;

[0019] Figure 3 This is a structural diagram of the variable diameter cutter assembly;

[0020] Figure 4 This is an exploded view of the variable diameter cutter assembly;

[0021] Figure 5 This is a structural diagram of the scissor-type extension assembly;

[0022] Figure 6 This is a structural diagram of the clamping mechanism;

[0023] Figure 7 This is a partially exploded view of the clamping mechanism;

[0024] Figure 8 This is a partial sectional view of the clamping mechanism;

[0025] Figure 9 This is a structural diagram of the compression block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0027] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0028] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0029] Reference Figure 1-9 A cross-cutting mechanism includes a frame 1, on which an adjustable variable-diameter blade assembly 2 and a grooved roller assembly 3 are mounted. The variable-diameter blade assembly 2 includes a blade shaft seat 4, within which a sliding shaft 6 driven by a first motor 5 and movable along its length is installed. Cutting blade assemblies 7, which can retract or extend laterally, are mounted on both sides of the blade shaft seat 4. The cutting blade assemblies 7 are connected to the sliding shaft 6 and the blade shaft seat 4 via a plurality of arranged scissor-type extension assemblies 8, which adjust the cutting speed. The rotation radius of the blade assembly 7 can adapt to the production of packaging bags of different lengths. The variable diameter blade assembly 2 rises and falls synchronously and is precisely matched with the blade groove roller assembly 3 to ensure stable cutting. A locking plate 9 is installed on the inner side of the blade assembly 7, and a clamping mechanism 10 is installed on the blade shaft seat 4 to clamp the locking plate 9. At the moment of cutting, the reaction force generated by the paper on the blade assembly 7 is transferred to the locking plate 9, which effectively suppresses the shrinkage deformation of the scissor extension assembly 8 caused by the force and solves the problem of the blade assembly 7 retracting during the cutting process.

[0030] The scissor-type extension assembly 8 includes a first fixed rotating arm 11, a second fixed rotating arm 12, a first movable rotating arm 13, and a second movable rotating arm 14. The ends of the first fixed rotating arm 11 and the second fixed rotating arm 12 are connected by a fixed shaft 15 and mounted on the cutter shaft seat 4. The other end of the first fixed rotating arm 11 is mounted on the first movable rotating arm 13 via a first hinge shaft, and the other end of the second fixed rotating arm 12 is mounted on the second movable rotating arm 14 via a second hinge shaft. The first movable rotating arm 13 and the second movable rotating arm 14 are connected by a movable shaft 16 and mounted on the sliding shaft 6. The sliding shaft 6 is amplified by lever principle, realizing a wide range of radius adjustment for the cutter assembly 7. It also has strong structural rigidity and excellent load-bearing capacity.

[0031] The first rotating arm 13 and the second rotating arm 14 extend outward to have mounting portions 17, and the cutter assembly 7 is mounted on the end of the mounting portion 17.

[0032] The clamping mechanism 10 includes a mounting base 18 fixedly installed on the cutter shaft seat 4. A pressure block 20 is installed in the mounting base 18 and pressed against the cutter shaft seat 4 by a spring sheet assembly 19. The locking plate 9 is inserted between the cutter shaft seat 4 and the pressure block 20. After the rotation radius of the cutter assembly 7 is adjusted, the elastic force of the spring sheet assembly 19 passes through the pressure block 20 to press the locking plate 9 onto the cutter shaft seat 4, thereby achieving the effect of locking the cutter assembly 7.

[0033] Furthermore, the clamping mechanism 10 also includes a pull rail component 21 driven by a cylinder. The pull rail component 21 passes between the mounting base 18 and the pressure block 20. Guide wheels 22 are mounted on both sides of the pull rail component 21 and the pressure block 20. The pressure block 20 has inclined surfaces 23 on both sides corresponding to the guide wheels 22. The guide wheels 22 abut against the inclined surfaces 23. When the cylinder drives the pull rail component 21 to pull back (pull towards the cylinder), the guide wheels 22 move synchronously. Through cooperation with the inclined surfaces 23, the pressure block 20 is raised, and the locking plate 9 is unlocked. At this time, the rotation radius of the cutter assembly 7 can be adjusted. When the cylinder drives the pull rail component 21 to extend (push away from the cylinder), the guide wheels 22 move synchronously. Since the inclined surfaces 23 are no longer limited by the guide wheels 22, the pressure block 20 is pressed down by the spring sheet group 19, thereby pressing the locking plate 9.

[0034] Furthermore, the top of the pressure block 20 is provided with several limiting holes 24. The spring sheet assembly 19 is installed in the limiting holes 24 by positioning screws 25. The upper outer side of the positioning screw 25 is fixedly connected to the mounting base 18 by a threaded structure. When the spring sheet assembly 19 is installed, it will be limited by the screw head of the positioning screw 25 and the bottom of the limiting hole 24. That is, the elastic force of the spring sheet assembly 19 acts on the screw head of the positioning screw 25 and the bottom of the limiting hole 24.

[0035] Installation process of the clamping mechanism 10:

[0036] First, screw the positioning screw 25 into the mounting base 18, ensuring the top of the positioning screw 25 is higher than the top of the mounting base 18, and the bottom surface of the screw head of the positioning screw 25 is flush with the inner top of the mounting base 18 (or there is enough space to accommodate the spring assembly 19). Then, place the pressure block 20 inside the pull rail 21 and install the guide wheel 22. At this time, the pressure block 20 is restricted by the guide wheel 22 and can only slide against the pull rail 21, but cannot detach. Then install the pull rail 21... On the cutter shaft seat 4, the spring piece assembly 19 is placed into the limiting hole 24, and the mounting base 18 is fixed on the cutter shaft seat 4. At the same time, the positioning screw 25 passes through the spring piece assembly 19. At this time, since the screw head of the positioning screw 25 and the limiting hole 24 have enough space to accommodate the spring piece assembly 19, the spring piece assembly 19 does not generate elastic force. After the mounting base 18 is installed, the positioning screw 25 is screwed in. At this time, the screw head of the positioning screw 25 and the limiting hole 24 compress the spring piece assembly 19 to generate elastic force.

[0037] Furthermore, the degree to which the positioning screw 25 is screwed in needs to be sufficient to compress the spring assembly 19 and generate enough elastic force to press the locking plate 9 tightly.

[0038] The grooved roller assembly 3 includes a rotating shaft 27 driven by a second motor 26. Gears 28 are installed at both ends of the rotating shaft 27. Lifting brackets 29 are installed on both sides of the variable diameter blade assembly 2. The lifting brackets 29 are equipped with racks 30 that mesh with the gears 28. When the first motor 5 is driven, the second motor 26 starts synchronously. For example, when the first motor 5 is driven, the rotation radius of the cutter assembly 7 is increased by 5 cm through the sliding shaft 6 and the scissor extension assembly 8. When the second motor 26 starts, the lifting brackets 29, i.e., the entire variable diameter blade assembly 2, are raised by 5 cm through the gears 28 and the racks 30, thereby achieving a precise match between the cutter assembly 7 and the grooved roller assembly 3 and ensuring stable cutting.

[0039] A non-powered cutting roller 31 is mounted on the rotating shaft 27. The cutting roller 31 is connected to the rotating shaft 27 via a bearing, allowing the rotating shaft 27 to rotate while the cutting roller 31 remains stationary (although the cutting roller 31 may still rotate when no external force is applied). At the moment of cutting, the paper is still in motion. When the cutter assembly 7 cuts the paper, it presses the paper against the cutting roller 31, causing the cutting roller 31 to rotate synchronously through friction. This reduces the pulling on the material and protects the material surface from damage. In the production process, the paper is constantly moving. At the moment of each cut, the speed of the cutting roller 31 is increased to be close to or the same as the speed of the paper. After the cut is completed, only the paper remains on the surface of the cutting roller 31. The friction between the paper and the cutting roller 31 will maintain the rotation speed of the cutting roller 31 to a certain extent, so as to prevent the rotation speed of the cutting roller 31 from dropping too quickly. When the next cut is performed, the paper may be damaged due to the large speed difference between the cutting assembly 7 and the cutting roller 31.

[0040] The lifting bracket 29 is connected to the frame 1 via the slide rail 32, which makes the lifting movement of the lifting bracket 29 more stable and smooth, reduces frictional resistance, and improves the operating accuracy and service life of the mechanism.

[0041] In this application, the drive mechanism that drives the variable diameter blade assembly 2 to rotate to achieve the cutting action and the corresponding transmission connection mechanism are existing technologies. They are adjusted according to different equipment and will not be described in detail.

[0042] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0044] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cross-cut mechanism comprising a frame (1), characterized in that The frame (1) is equipped with an adjustable variable diameter cutter assembly (2) and a cutter groove roller assembly (3) that works in conjunction with the variable diameter cutter assembly (2). The variable diameter cutter assembly (2) includes a cutter shaft seat (4). A sliding shaft (6) driven by a first motor (5) and moving along the length direction is installed inside the cutter shaft seat (4). Cutter assemblies (7) that can retract or extend to both sides are installed on both sides of the cutter shaft seat (4). The cutter assembly (7) is connected to the sliding shaft (6) and the cutter shaft seat (4) through a plurality of arranged scissor extension assemblies (8). A locking plate (9) is installed on the inner side of the cutter assembly (7). A clamping mechanism (10) that clamps the locking plate (9) is installed on the cutter shaft seat (4).

2. The transection mechanism of claim 1, wherein The scissor extension assembly (8) includes a first fixed rotating arm (11), a second fixed rotating arm (12), a first movable rotating arm (13), and a second movable rotating arm (14). The ends of the first fixed rotating arm (11) and the second fixed rotating arm (12) are connected by a fixed shaft (15) and mounted on the cutter shaft seat (4). The other end of the first fixed rotating arm (11) is mounted on the first movable rotating arm (13) via a first hinge shaft. The other end of the second fixed rotating arm (12) is mounted on the second movable rotating arm (14) via a second hinge shaft. The first movable rotating arm (13) and the second movable rotating arm (14) are connected by a movable shaft (16) and mounted on the sliding shaft (6).

3. The transection mechanism of claim 2, wherein The first rotating arm (13) and the second rotating arm (14) have mounting portions (17) extending outward, and the cutter assembly (7) is mounted on the end of the mounting portion (17).

4. The transection mechanism of claim 1, wherein The clamping mechanism (10) includes a mounting base (18) fixedly installed on the cutter shaft seat (4). A pressure block (20) is installed in the mounting base (18) and pressed against the cutter shaft seat (4) by a spring sheet group (19). The locking plate (9) is inserted between the cutter shaft seat (4) and the pressure block (20).

5. The transection mechanism of claim 4, wherein The clamping mechanism (10) also includes a pull rail component (21) driven by a cylinder. The pull rail component (21) passes between the mounting base (18) and the pressure block (20). The pull rail component (21) is equipped with guide wheels (22) on both sides of the pressure block (20). The pressure block (20) has inclined surfaces (23) on both sides corresponding to the guide wheels (22). The guide wheels (22) abut against the inclined surfaces (23).

6. The transection mechanism of claim 4, wherein The top of the pressure block (20) is provided with several limiting holes (24), and the spring sheet group (19) is installed in the limiting holes (24) by positioning screws (25). The upper outer side of the positioning screws (25) is fixedly connected to the mounting base (18) by a threaded structure.

7. The transection mechanism of claim 1, wherein The grooving roller assembly (3) includes a rotating shaft (27) driven by a second motor (26), gears (28) are installed at both ends of the rotating shaft (27), and lifting brackets (29) are installed on both sides of the variable diameter blade assembly (2), and racks (30) that mesh with the gears (28) are installed on the lifting brackets (29).

8. The transection mechanism of claim 7, wherein The rotation shaft (27) is provided with a non-powered knife groove roller (31) penetratingly.

9. The transection mechanism of claim 7, wherein The lifting support (29) is connected with the rack (1) through a sliding rail (32).

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