Transverse cutting mechanism

Abstract

The transverse cutting mechanism comprises a machine frame, a cutter groove roller assembly and a reducing cutter assembly capable of being adjusted up and down are installed on the machine frame, the reducing cutter assembly comprises a cutter shaft seat, a sliding shaft driven by a first motor to move in the length direction is installed in the cutter shaft seat, and cutter assemblies capable of contracting or stretching towards the two sides are installed on the two sides of the cutter shaft seat. The cutter assembly is connected with the sliding shaft and the cutter shaft seat through a plurality of arranged shear type stretching assemblies, the rotating radius of the cutter assembly is adjusted through the shear type stretching assemblies, the cutter assembly can adapt to production of packaging bags of different length specifications, the variable-diameter cutter assembly ascends and descends synchronously and is accurately matched with the cutter groove roller assembly, stable cutting is guaranteed, and a locking plate is installed on the inner side of the cutter assembly, so that the cutter assembly is convenient to use. The cutter shaft seat is provided with the holding mechanism for clamping the locking plate, counter-acting force generated at the moment of cutting is transferred to the locking plate, contraction deformation of the shear type stretching assembly caused by stress is effectively restrained, and the problem of retraction of the cutter assembly in the cutting process is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to a production line for cement bags, chemical bags and the like packaging bags, in particular to a cross-cut mechanism. BACKGROUND

[0002] In the production process of cement bags, chemical bags and the like packaging bags, paper rolls as core raw materials need to be processed into bags through multiple key processes such as gluing, cutting and bag making, among which the cutting process directly determines the size accuracy and production efficiency of the packaging bags, and is an important link affecting product quality and production benefit. In the prior art, the cutting process usually relies on the rotary motion of a cutter mechanism, and its working principle is that the cutter rotates with the cutter mechanism, and after each cutting, it needs to rotate one circle to return to the initial cutting position, and then the next cutting can be performed. The rotation radius of the cutter directly corresponds to the length of the packaging bag. However, this traditional cutter mechanism has significant technical limitations: on the one hand, since the radius of the cutter mechanism is fixed, when different sizes of packaging bags need to be produced, the cutter mechanism needs to be replaced as a whole, which not only increases the equipment adjustment time and labor cost, but also reduces the flexibility and continuity of production; on the other hand, due to the factors such as the weight and structural stability of the cutter mechanism, the rotation speed of the cutter cannot be greatly improved, resulting in low operation efficiency of one circle rotation only completing one cutting, which restricts the capacity improvement of the whole production line. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the present application provides a cross-cut mechanism.

[0004] The technical scheme adopted by the present application to solve its technical problems is: A cross-cut mechanism, comprising a rack, a variable-diameter cutter assembly adjustably mounted on the rack, and a cutter groove roller assembly cooperatively used with the variable-diameter cutter assembly, the variable-diameter cutter assembly comprising a cutter shaft seat, a sliding shaft driven by a first motor and moving along the length direction being installed in the cutter shaft seat, cutter assemblies capable of being retracted or extended to both sides being mounted on both sides of the cutter shaft seat, the cutter assemblies being connected with the sliding shaft and the cutter shaft seat through a plurality of arranged shear type extension assemblies, a locking plate being mounted on the inner side of the cutter assemblies, and a clamping mechanism being mounted on the cutter shaft seat to clamp the locking plate.

[0005] The shear type extension assembly comprises a first fixed rotary arm, a second fixed rotary arm, a first movable rotary arm and a second movable rotary arm, the end portions of the first fixed rotary arm and the second fixed rotary arm are connected through a fixed shaft and are mounted on the cutter shaft seat, the other end of the first fixed rotary arm is mounted on the first movable rotary arm through a first hinged shaft, the other end of the second fixed rotary arm is mounted on the second movable rotary arm through a second hinged shaft, and the first movable rotary arm and the second movable rotary arm are connected through a movable shaft and are mounted on the sliding shaft.

[0006] The first and second moving rotary arms extend outwardly with mounting portions, and the cutter assembly is mounted at the end of the mounting portions.

[0007] The holding mechanism comprises a mounting seat fixedly mounted on the cutter shaft seat, a pressing block is mounted in the mounting seat and is pressed towards the cutter shaft seat by a spring set, and the locking plate is inserted between the cutter shaft seat and the pressing block.

[0008] The holding mechanism further comprises a pull rail driven by a gas cylinder, the pull rail passes through between the mounting seat and the pressing block, guide wheels are mounted on both sides of the pull rail, inclined surfaces are arranged on both sides of the pressing block corresponding to the guide wheels, and the guide wheels abut against the inclined surfaces.

[0009] A plurality of limiting holes are arranged on the top of the pressing block, the spring set is mounted in the limiting holes through positioning screws, and the upper end of the positioning screw is fixedly connected with the mounting seat through a threaded structure.

[0010] The cutter groove roller assembly comprises a rotating shaft driven by a second motor, gears are mounted on both sides of the rotating shaft, lifting supports are mounted on both sides of the variable-diameter cutter assembly, and racks meshing with the gears are mounted on the lifting supports.

[0011] A non-powered cutter groove roller is arranged on the rotating shaft.

[0012] The lifting supports are connected with the rack through sliding rails.

[0013] The beneficial effects of the present application are as follows: the variable-diameter cutter assembly and the cutter groove roller assembly cooperating with the variable-diameter cutter assembly are mounted on the rack, the variable-diameter cutter assembly comprises a cutter shaft seat, a sliding shaft moving along the length direction is mounted in the cutter shaft seat and is driven by a first motor, cutter assemblies that can be retracted or extended to both sides are mounted on both sides of the cutter shaft seat, the cutter assemblies are connected with the sliding shaft and the cutter shaft seat through a plurality of arranged shear type extension assemblies, the rotation radius of the cutter assemblies is adjusted through the shear type extension assemblies, different length specifications of the packaging bag production can be adapted, the variable-diameter cutter assembly is synchronously lifted, and is accurately matched with the cutter groove roller assembly, so that the cutting stability is ensured, the locking plate is mounted on the inner side of the cutter assembly, the holding mechanism clamping the locking plate is mounted on the cutter shaft seat, the reaction force generated in the cutting moment is transferred to the locking plate, the contraction deformation of the shear type extension assembly caused by the force is effectively inhibited, and the retraction problem of the cutter assembly in the cutting process is solved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described below in combination with the drawings and examples.

[0015] Figure 1 is a structural diagram of the present application; Figure 2 is a structure diagram of the variable-diameter cutter assembly and the cutter groove roller assembly; Figure 3 is a structure diagram of the variable-diameter cutter assembly; Figure 4 is an exploded view of the variable-diameter cutter assembly; Figure 5 is a structure diagram of the scissor stretching assembly; Figure 6 is a structure diagram of the holding mechanism; Figure 7 is a partial exploded view of the holding mechanism; Figure 8 is a partial sectional view of the holding mechanism; Figure 9 is a structure diagram of the pressing block. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application is further described in detail below in combination with specific embodiments and with reference to the drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0017] It is understood that the above description is only exemplary and is not intended to limit the scope of the present application.

[0018] Some embodiments of the present application are described below in combination with the drawings.

[0019] With reference to Figures 1-9 , a cross-cutting mechanism includes a rack 1, a variable-diameter cutter assembly 2 mounted on the rack 1 and adjustable up and down, and a cutter groove roller assembly 3 used in cooperation with the variable-diameter cutter assembly 2. The variable-diameter cutter assembly 2 includes a cutter shaft seat 4, a sliding shaft 6 inside the cutter shaft seat 4 driven to move along the length direction by a first motor 5, and a cutting knife assembly 7 mounted on both sides of the cutter shaft seat 4 and retractable or extendable to both sides. The cutting knife assembly 7 is connected with the sliding shaft 6 and the cutter shaft seat 4 through a plurality of arranged scissor stretching assemblies 8, the rotation radius of the cutting knife assembly 7 is adjusted through the scissor stretching assemblies 8, and different length specifications of packaging bag production can be adapted. The variable-diameter cutter assembly 2 is synchronously lifted and lowered, precisely matches the cutter groove roller assembly 3, ensures stable cutting, and the inside of the cutting knife assembly 7 is mounted with a locking plate 9. The cutter shaft seat 4 is mounted with a holding mechanism 10 clamping the locking plate 9. At the moment of cutting, the reaction force of paper on the cutting knife assembly 7 is transferred to the locking plate 9, effectively inhibiting the contraction deformation of the scissor stretching assemblies 8 due to force, and solving the problem of retraction of the cutting knife assembly 7 in the cutting process.

[0020] The scissor type stretching assembly 8 comprises a first fixed rotary arm 11, a second fixed rotary arm 12, a first movable rotary arm 13 and a second movable rotary arm 14, the ends of the first fixed rotary arm 11 and the second fixed rotary arm 12 are connected by a fixed shaft 15 and are installed on the cutter shaft seat 4, the other end of the first fixed rotary arm 11 is installed on the first movable rotary arm 13 by a first hinged shaft, the other end of the second fixed rotary arm 12 is installed on the second movable rotary arm 14 by a second hinged shaft, the first movable rotary arm 13 and the second movable rotary arm 14 are connected by a movable shaft 16 and are installed on the sliding shaft 6, the movement stroke of the sliding shaft 6 is enlarged by the lever principle, the large range radius adjustment of the cutter assembly 7 is realized, and the structure is rigid and has excellent carrying capacity.

[0021] The first movable rotary arm 13 and the second movable rotary arm 14 extend outwardly and have a mounting portion 17, and the cutter assembly 7 is installed at the end of the mounting portion 17.

[0022] The clamping mechanism 10 comprises a mounting seat 18 fixedly installed on the cutter shaft seat 4, a pressing block 20 is installed in the mounting seat 18 and is pressed towards the cutter shaft seat 4 by a spring group 19, and the locking plate 9 is inserted between the cutter shaft seat 4 and the pressing block 20, when the rotary radius adjustment of the cutter assembly 7 is completed, the locking plate 9 is pressed tightly on the cutter shaft seat 4 by the elastic force of the spring group 19 through the pressing block 20, so that the locking effect of the cutter assembly 7 is realized.

[0023] Further, the clamping mechanism 10 further comprises a pull rail 21 driven by a gas cylinder, the pull rail 21 passes through between the mounting seat 18 and the pressing block 20, guide wheels 22 are installed on both sides of the pressing block 20, inclined surface portions 23 are arranged on both sides of the pressing block 20 corresponding to the guide wheels 22, the guide wheels 22 abut against the inclined surface portions 23, when the gas cylinder drives the pull rail 21 to be pulled back (pulls in the direction of the gas cylinder), the guide wheels 22 move synchronously, through cooperation with the inclined surface portions 23, the pressing block 20 is lifted, the locking plate 9 is unlocked, at this time, the rotary radius of the cutter assembly 7 can be adjusted, when the gas cylinder drives the pull rail 21 to be stretched (pushes in the direction away from the gas cylinder), the guide wheels 22 move synchronously, the inclined surface portions 23 are not limited by the guide wheels 22, the pressing block 20 is pressed down by the spring group 19, so that the locking plate 9 is pressed tightly.

[0024] Further, the top of the pressing block 20 is provided with a plurality of limiting holes 24, the elastic sheet group 19 is installed in the limiting hole 24 through the positioning screw 25, the upper end of the positioning screw 25 is fixedly connected with the mounting seat 18 through the threaded structure, and when the installation of the elastic sheet group 19 is completed, the elastic sheet group 19 is 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 elastic sheet group 19 is applied to the screw head of the positioning screw 25 and the bottom of the limiting hole 24.

[0025] The installation process of the holding mechanism 10: First, the positioning screw 25 is screwed into the mounting seat 18, and the top of the positioning screw 25 is higher than the top of the mounting seat 18, the bottom surface of the screw head of the positioning screw 25 is flush with the inner top of the mounting seat 18 (or there is enough space to accommodate the elastic sheet group 19), then the pressing block 20 is placed in the pull rail 21, and the guide wheel 22 is installed, at this time, the pressing block 20 is limited by the guide wheel 22 and can only slide with the pull rail 21, but cannot be separated, then the pull rail 21 is installed on the cutter shaft seat 4, the elastic sheet group 19 is placed in the limiting hole 24, the mounting seat 18 is fixed on the cutter shaft seat 4, and the positioning screw 25 is arranged in the elastic sheet group 19, at this time, since the screw head of the positioning screw 25 and the limiting hole 24 have enough space to accommodate the elastic sheet group 19, the elastic sheet group 19 does not generate elastic force, when the mounting seat 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 elastic sheet group 19 to generate elastic force.

[0026] Further, the degree of screwing of the positioning screw 25 needs to meet the condition that the elastic sheet group 19 is compressed to generate elastic force enough to compress the locking plate 9.

[0027] The cutter groove roller assembly 3 comprises a rotating shaft 27 driven by a second motor 26, gear wheels 28 are installed on both sides of the rotating shaft 27, lifting supports 29 are installed on both sides of the variable-diameter cutter assembly 2, and the lifting supports 29 are provided with racks 30 in meshing transmission with the gear wheels 28, when the first motor 5 is driven, the second motor 26 is synchronously started, for example, when the first motor 5 is driven, the rotating radius of the cutter assembly 7 is increased by 5 cm through the sliding shaft 6 and the scissor stretching assembly 8, the second motor 26 is started, the lifting supports 29 are driven through the gear wheels 28 and the racks 30, that is, the whole variable-diameter cutter assembly 2 is lifted by 5 cm, so that the cutter assembly 7 and the cutter groove roller assembly 3 are accurately matched, and the cutting stability is ensured.

[0028] The rotating shaft 27 is provided with a non-powered knife groove roller 31, the knife groove roller 31 is connected with the rotating shaft 27 through a bearing, the rotating shaft 27 is realized, and the knife groove roller 31 can not rotate (when no external force is applied, the knife groove roller 31 can still rotate), in the instant of cutting, the paper is still in the process of movement, when the cutter assembly 7 cuts the paper, the paper is pressed to the knife groove roller 31, so that the knife groove roller 31 is synchronously rotated through friction, the pulling of the material is reduced, the surface of the material is protected from being damaged, and actually, because the paper is continuously operated in the production process, the speed of the knife groove roller 31 is pulled up to be close to or the same as the operation of the paper in the instant of cutting, after the cutting is completed, only the paper is drawn on the surface of the knife groove roller 31, the rotation speed of the knife groove roller 31 is still maintained to a certain extent through the friction between the paper and the knife groove roller 31, so that the rotation speed of the knife groove roller 31 is prevented from being too fast, and when the next cutting is performed, because the speed difference between the cutter assembly 7 and the knife groove roller 31 is too large, the paper can be damaged.

[0029] The lifting support 29 is connected with the rack 1 through a sliding rail 32, so that the lifting movement of the lifting support 29 is more stable and smooth, friction resistance is reduced, and the operation precision and service life of the mechanism are improved.

[0030] In the application, a driving mechanism for driving the variable-diameter cutter assembly 2 to rotate to realize the cutting action and a corresponding transmission connection mechanism belong to the prior art, and are adjusted according to different equipment, and are not described herein.

[0031] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, detachable connection or integral connection; "connecting" can be direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] It should be noted that when an element is referred to as "assembled", "mounted", "fixed" or "provided" to another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or a middle element can exist at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0033] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in an appropriate manner.

[0034] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A cross-cutting 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 cross-cutting mechanism according to claim 1, characterized in that... 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 cross-cutting mechanism according to claim 2, characterized in that... 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 cross-cutting mechanism according to claim 1, characterized in that... 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 cross-cutting mechanism according to claim 4, characterized in that... 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 cross-cutting mechanism according to claim 4, characterized in that... 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 cross-cutting mechanism according to claim 1, characterized in that... 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 cross-cutting mechanism according to claim 7, characterized in that... The rotating shaft (27) is fitted with a non-powered cutting groove roller (31).

9. The cross-cutting mechanism according to claim 7, characterized in that... The lifting support (29) is connected to the frame (1) via a slide rail (32).

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