Rolling extrusion cutting mechanism for packaging machine

Abstract

The utility model relates to the technical field of packaging equipment, in particular to a rolling extrusion cutting mechanism for a packaging machine, which comprises a mounting seat, two groups of parallel guide plates arranged on one side of the mounting seat, a cutter pillow shaft and a hob shaft which roll relatively arranged between the two groups of guide plates, a pillow block arranged on one radial side of the cutter pillow shaft, and a cutter arranged on one radial side of the hob shaft. And one end of the cutter pillow shaft and one end of the hob shaft are respectively connected with a rotary driving device. The pillow block and the cutter which roll relatively are adopted, the sliding cutting action is replaced with the clamping action which rolls relatively, the structure is more compact, and the cutting force is easy to adjust.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and in particular to a rolling extrusion cutting mechanism for packaging machines. Background Technology

[0002] After the packaging bags are filled and sealed in the packaging machine, they need to be cut. Existing technology generally uses an independent cutter in the cutter groove for cutting. Chinese patent application CN206544644U discloses a packaging bag cutting device, including a cutter seat and a cutting component. The cutting component is slidably arranged in the cutter seat. Although it has two bag openings in the same equipment, which can improve production efficiency to a certain extent and reduce the problem of excessive temperature caused by continuous operation of the cutter, and prevent packaging bag strands from sticking to the cutter, the cutting pressure of this solution is difficult to adjust, making it difficult to guarantee the reliability of the cutting effect after long-term operation, and the blade life is still relatively low. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a rolling extrusion cutting mechanism for packaging machines, which addresses the above-mentioned technical deficiencies. It adopts a relatively rolling pillow block and a cutter, and replaces the sliding cutting action with a relatively rolling clamping action. The structure is more compact, the cutting force is easy to adjust, and the problem of low service life of existing sliding blades is solved.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a rolling extrusion cutting mechanism for a packaging machine, including a mounting base, two sets of parallel guide plates on one side of the mounting base, a relatively rolling blade pillow shaft and a roller shaft between the two sets of guide plates, a pillow block on the radial side of the blade pillow shaft, a cutter on the radial side of the roller shaft, and a rotary drive device connected to one end of the blade pillow shaft and the roller shaft respectively.

[0005] To further optimize this technical solution, the working surface of the pillow block is prominently located on the outside of the cutter pillow shaft body, and the cutting edge of the cutter is located on the outside of the hob shaft body. Elastic cotton is provided on the front side of the pillow block and the cutter in the rotation direction. When the cutter pillow shaft and the hob shaft roll relative to each other, the two sets of elastic cotton are arranged in relative rolling contact.

[0006] To further optimize this technical solution, the elastic cotton is fixed in the outer circumferential surface of the arc plate, and a clamping sleeve is provided at one axial end of the arc plate. The two sets of elastic cotton are respectively sleeved on the outside of the cutter pillow shaft and the hob shaft through the clamping sleeve. The maximum outer diameter of the elastic cotton in the cutter pillow shaft is greater than the maximum outer diameter of the pillow block in the cutter pillow shaft, and the maximum outer diameter of the elastic cotton in the hob shaft is greater than the maximum outer diameter of the cutter in the hob shaft.

[0007] To further optimize this technical solution, the rotary drive device includes two meshing gears, which are coaxially mounted on the same end of the cutter head shaft and the hob shaft, and a rotary motor is connected to the end of one of the gears.

[0008] To further optimize this technical solution, bearing housings are provided at both ends of the axial direction of the tool rest shaft and the hob shaft. The bearing housings at both ends are slidably connected in the guide plates on the corresponding sides. Tightening bolts are threadedly connected to the outer sides of both ends of the two sets of guide plates. The screw ends of the tightening bolts are abutted against one side of the bearing housing on the corresponding side in the sliding direction.

[0009] To further optimize this technical solution, a pressure strip is provided on the side of the guide plate away from the mounting seat. The corresponding tightening bolt on the same side is threadedly connected to the middle of the pressure strip at the corresponding position. A clamping spring is provided on the side of the pressure strip away from the guide plate. A clamping bolt passes through the clamping spring. The clamping bolt is threadedly connected to the guide plate. The clamping spring is located between the nut of the clamping bolt and the pressure strip. The pressure strip is slidably connected along the threaded part of the clamping bolt.

[0010] Compared with the prior art, this utility model has the following advantages: 1. It adopts a relatively rolling pillow block and cutter, and replaces the sliding cutting action with a relatively rolling clamping action, making the structure more compact and easier to adjust the cutting force; 2. The packaging bag to be cut is inserted between the knife pillow shaft and the roller shaft from top to bottom. When the horizontal seal of the packaging bag falls into the intersection of the cutting path and the pillow block's rotation path, the rotary motor drives the knife pillow shaft and the roller shaft to rotate, and the packaging bag is cut by the mutual squeezing of the cutter and the pillow block; 3. Before being cut, the packaging bag comes into contact with the elastic cotton on both sides and is squeezed and straightened, avoiding shaking or tilting of the packaging bag before cutting, thus ensuring accurate packaging cuts; 4. By setting two sets of opposing tightening bolts, the center distance between the knife pillow shaft and the roller shaft can be adjusted, which can better adjust the cutting force between the pillow block and the cutter, effectively improving the service life of the cutter. Attached Figure Description

[0011] Figure 1 A schematic diagram of the overall mechanism of a rolling extrusion and cutting mechanism for a packaging machine;

[0012] Figure 2 This is a top view of a rolling extrusion cutting mechanism for a packaging machine;

[0013] Figure 3 An axial view of the cutting position in a rolling extrusion cutting mechanism for a packaging machine;

[0014] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0015] Figure 5 This is a schematic diagram of the hob shaft.

[0016] Figure 6 This is an exploded schematic diagram of the tool rest shaft.

[0017] In the diagram: 1. Mounting base; 11. Guide plate; 2. Cutter pillow shaft; 20. Pillar groove; 21. Pillar block; 3. Hob shaft; 30. Cutter groove; 31. Cutter; 4. Bearing box; 5. Pressure strip; 51. Tightening bolt; 52. Compression spring; 53. Compression bolt; 6. Gear; 7. Rotary motor; 8. Elastic cotton; 80. Arc plate; 81. Clamping sleeve. Detailed Implementation

[0018] 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 the accompanying drawings and specific embodiments. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0019] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" used in this application to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Combination Figures 1 to 3 As shown, a rolling extrusion cutting mechanism for a packaging machine includes a plate-shaped mounting base 1. Two sets of parallel guide plates 11 are provided on one side of the end of the mounting base 1. A blade pillow shaft 2 and a roller shaft 3 are provided between the two sets of guide plates 11 and roll relative to each other. Bearing boxes 4 are provided at both ends of the blade pillow shaft 2 and the roller shaft 3. The bearing boxes 4 at both ends are slidably connected in the guide plates 11 on the corresponding sides. Tightening bolts 51 are threadedly connected to the outer sides of both ends of the two sets of guide plates 11. The screw ends of the tightening bolts 51 abut against one side of the bearing box 4 on the corresponding side in the sliding direction.

[0021] A pressure strip 5 is provided on the side of the guide plate 11 away from the mounting base 1. The corresponding tightening bolt 51 on the same side is threadedly connected to the middle of the pressure strip 5 at the corresponding position. A compression spring 52 is provided on the side of the pressure strip 5 away from the guide plate 11. A compression bolt 53 passes through the compression spring 52. The compression bolt 53 is threadedly connected to the guide plate 11. The compression spring 52 is located between the nut of the compression bolt 53 and the pressure strip 5. The pressure strip 5 is slidably connected along the threaded portion of the compression bolt 53.

[0022] One end of the cutter head shaft 2 and the hob shaft 3 are respectively connected to a rotary drive device. The rotary drive device includes two meshing gears 6, which are coaxially arranged at the same end of the cutter head shaft 2 and the hob shaft 3, and one end of the gear 6 is connected to a rotary motor 7 via a coupling.

[0023] Combination Figures 3 to 6 As shown, the blade rest shaft 2 has a rest groove 20 on one radial side, and a rest block 21 is detachably provided in the rest groove 20. The working surface of the rest block 21 is protruding and located on the radial outer side of the blade rest shaft 2 body. The hobbing shaft 3 has a blade groove 30 on one radial side, and a cutter 31 is detachably provided in the blade groove 30. The cutting edge of the cutter 31 is located on the radial outer side of the hobbing shaft 3 body. Elastic cotton 8 is provided on the front side of the rest block 21 and the cutter 31 in the rotation direction. The cross-section of the elastic cotton 8 is fan-shaped. The maximum outer diameter of the elastic cotton 8 in the blade rest shaft 2 is greater than the maximum outer diameter of the rest block 21 in the blade rest shaft 2, and the maximum outer diameter of the elastic cotton 8 in the hobbing shaft 3 is greater than the maximum outer diameter of the cutter 31 in the hobbing shaft 3. The elastic cotton 8 is fixed in the outer peripheral surface of the arc plate 80. A clamp sleeve 81 is provided at one axial end of the arc plate 80. The two sets of elastic cotton 8 are respectively sleeved on the outer side of the blade rest shaft 2 and the hobbing shaft 3 through the clamp sleeve 81. When the blade pillow shaft 2 and the roller shaft 3 roll relative to each other, the two sets of elastic cotton 8 are arranged in relative rolling contact.

[0024] When using, combine Figures 1 to 6 As shown, the packaging bag to be cut is inserted between the cutter shaft 2 and the roller shaft 3 from top to bottom. When the horizontal seal of the packaging bag falls into the intersection of the rotation path of the cutter 31 and the rotation path of the pillow block 21, the rotary motor 7 is controlled to drive the cutter shaft 2 and the roller shaft 3 to rotate. The packaging bag is cut by the mutual squeezing of the cutter 31 and the pillow block 21. When the cutter 31 and the pillow block 21 rotate synchronously, they maintain a certain pressure, which can just cut the packaging bag.

[0025] Before being cut, the packaging bag comes into contact with the elastic cotton 8 on both sides and is squeezed and straightened to prevent the packaging bag from shaking or tilting before cutting, ensuring accurate packaging cuts. By setting two sets of opposing tightening bolts 51, the center distance between the blade support shaft 2 and the roller shaft 3 can be adjusted, which can better adjust the cutting force between the support block 21 and the cutter 31, effectively improving the service life of the cutter 31.

[0026] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A rolling extrusion cutting mechanism for a packaging machine, comprising a mounting base (1), wherein two sets of parallel guide plates (11) are provided on one side of the mounting base (1), characterized in that: Between the two sets of guide plates (11) are a relatively rolling blade pillow shaft (2) and a hob shaft (3). A pillow block (21) is provided on one radial side of the blade pillow shaft (2), and a cutter (31) is provided on one radial side of the hob shaft (3). A rotary drive device is connected to one end of the blade pillow shaft (2) and the hob shaft (3).

2. The rolling extrusion cutting mechanism for a packaging machine according to claim 1, characterized in that: The working surface of the pillow block (21) is protruding and located on the outside of the body of the knife pillow shaft (2). The cutting edge of the cutter (31) is located on the outside of the body of the hob shaft (3). Elastic cotton (8) is provided on the front side of the pillow block (21) and the cutter (31) in the rotation direction. When the knife pillow shaft (2) and the hob shaft (3) roll relative to each other, the two sets of elastic cotton (8) are arranged in relative rolling contact.

3. The rolling extrusion cutting mechanism for a packaging machine according to claim 2, characterized in that: The elastic cotton (8) is fixed in the outer peripheral surface of the arc plate (80). The arc plate (80) has a clamp sleeve (81) at one axial end. The two sets of elastic cotton (8) are respectively sleeved on the outside of the blade pillow shaft (2) and the hobbing shaft (3) through the clamp sleeve (81). The maximum outer diameter of the elastic cotton (8) in the blade pillow shaft (2) is greater than the maximum outer diameter of the pillow block (21) in the blade pillow shaft (2). The maximum outer diameter of the elastic cotton (8) in the hobbing shaft (3) is greater than the maximum outer diameter of the cutter (31) in the hobbing shaft (3).

4. The rolling extrusion cutting mechanism for a packaging machine according to claim 1, characterized in that: The rotary drive device includes two meshing gears (6), which are coaxially arranged at the same end of the cutter head shaft (2) and the hobbing shaft (3), and a rotary motor (7) is connected to the end of one of the gears (6).

5. The rolling extrusion cutting mechanism for a packaging machine according to claim 4, characterized in that: The blade pillow shaft (2) and the hobbing shaft (3) are respectively provided with bearing boxes (4) at both ends of the axial direction. The bearing boxes (4) at both ends are slidably connected in the guide plates (11) on the corresponding sides. The outer sides of the two sets of guide plates (11) are respectively threaded with tightening bolts (51). The screw end of the tightening bolt (51) is abutted against one side of the bearing box (4) on the corresponding side in the sliding direction.

6. The rolling extrusion cutting mechanism for a packaging machine according to claim 5, characterized in that: The guide plate (11) has a pressure strip (5) on the side away from the mounting base (1). The corresponding tightening bolt (51) on the same side is threadedly connected to the middle of the pressure strip (5) at the corresponding position. The pressure strip (5) has a compression spring (52) on the side away from the guide plate (11). A compression bolt (53) passes through the compression spring (52). The compression bolt (53) is threadedly connected to the guide plate (11). The compression spring (52) is located between the nut of the compression bolt (53) and the pressure strip (5). The pressure strip (5) is slidably connected along the threaded portion of the compression bolt (53).

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