Slitting knife assembly and slitting equipment

Abstract

The slitting knife assembly comprises a cutting knife structure, a cutting part is arranged in the cutting knife structure and used for cutting a film material, buffer structures are formed on the two sides of the width direction of a film corresponding to the cutting part, and each buffer structure is provided with an acting part which inclines and deforms towards the rotating axis. According to the slitting knife assembly, the buffering acting surface matched with the thin film is formed on the cutting part, the stretching effect of the cutting knife on the thin film can be reduced during shearing, and then the slitting effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polymer film cooling equipment, in particular to a slitting knife assembly and slitting equipment. Background Art

[0002] Composite conductive film is a polymer material with metal plated on the surface. It can be used in the field of secondary batteries as a current collector, or in the field of optoelectronics as a (flexible) conductive film. For example, aluminum film is generally obtained by evaporation, and copper film is obtained by sputtering and water electroplating.

[0003] After the film is unloaded from the machine, it needs to be cut. Currently, the commonly used cutting equipment for the above-mentioned film, such as CN219946368U, adopts a single cutter with a cutting groove for cutting; there are also scissor-type cutting structures, such as the relevant cutting structure in CN117245723A.

[0004] The above structure will cause tearing and stretching of the film during cutting, especially when the cutter is worn. Thus, the end of the film formed by slitting is prone to curling or wavy edges after winding, affecting the quality of the finished product. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide a slitting knife assembly, in which a buffering surface is formed on the cutting part to cooperate with the film, which can reduce the stretching effect of the cutter on the film during shearing, thereby improving the slitting effect.

[0006] Another object of the utility model is to provide a slitting device based on the above components.

[0007] The technical solution of the utility model is as follows:

[0008] A slitting knife assembly, comprising:

[0009] The cutter structure includes a cutting portion, which provides a cutting effect on the film material; a buffer structure is formed on both sides of the film width direction corresponding to the cutting portion, and the buffer structure has an action portion that is tilted and deformed toward the rotation axis.

[0010] Based on the above technical solution, a buffer structure is provided to provide support for the film while providing deformation space toward the cutting part, and to provide a certain tension force to the film on both sides of the cutting part, thereby improving the flatness of the cutting part.

[0011] Furthermore, the action portion includes an action surface which forms a certain angle with the horizontal plane, and the action surface forms a continuous guiding effect on the width direction of the membrane material.

[0012] Further, the cutter structure includes a double cutter structure.

[0013] Further, the cutter structure comprises a first cutter and a second cutter, and the axial projections of the first cutter and the second cutter partially overlap.

[0014] Furthermore, the distance between the blades of the first cutter and the second cutter does not exceed 5 mm.

[0015] Furthermore, the buffer structure includes a first support portion arranged on the outer periphery of the first cutter, the first support portion is inclined inwardly toward the central axis direction and is arranged on the outer side of the first blade portion relative to the cutting portion width direction, serving as an action portion.

[0016] Furthermore, the inward inclination angle of the first support portion relative to the horizontal plane of the film material is not greater than the inclination angle of the blade portion.

[0017] Furthermore, a coaxially rotatable support pad is arranged corresponding to the first cutter, the support pad forms a cutting groove corresponding to the cutting portion, and the first cutter is arranged in the cutting groove.

[0018] Furthermore, a second supporting portion is correspondingly provided on the other side of the cutting portion.

[0019] Furthermore, a horizontal distance between the second supporting portion and the second cutting knife does not exceed 10 mm.

[0020] Furthermore, the action surface of the first supporting portion and / or the second supporting portion is an inclined plane, and / or an arcuate surface with an arc-shaped transition; and / or is stepped.

[0021] Furthermore, a chip removal groove is provided radially inwardly of the cutting edge of the first cutter.

[0022] Furthermore, the second cutter and the first cutter are provided with a yielding portion corresponding to the cutting portion.

[0023] Furthermore, the yielding portion is an action surface arranged on the side of the second cutting knife corresponding to the width direction of the film material, and the angle between the yielding portion and the film surface is less than 90°.

[0024] Further, the cutter structure includes a single cutter structure.

[0025] Furthermore, a rotating support pad is provided corresponding to the cutter, a cutting groove is provided on the support pad, and the buffer structure includes a first support portion and a second support portion provided at the top end of the cutting groove as an action portion.

[0026] Furthermore, the buffer structure also includes a heating component.

[0027] A slitting device comprises the above-mentioned cutter assembly.

[0028] The beneficial effects of the utility model are as follows: through the synergistic effect of the buffer structure and the cutter structure, the cutter will exert pressure on the membrane material when cutting, and the setting of the support part in the buffer structure can make the membrane material at the end realize tension while adapting to the extrusion force of the cutter. Compared with the horizontal action surface in the prior art, the cutting end of the membrane material can provide a larger deformation space, and at the same time, form tension in the width direction of the cutting part of the membrane material, so that the membrane surface is smoother during cutting, and the cutting part is not easy to be torn due to extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 A schematic diagram of a slitting knife assembly of a double-slitting knife structure proposed in the present invention;

[0031] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0032] Figure 3 for Figure 1 A schematic diagram of the side view structure of the first cutting knife;

[0033] Figure 4 It is a structural schematic diagram of an improved solution in a cutter assembly;

[0034] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0035] Figure 6 It is a schematic diagram of a slitting knife assembly of a single set of cutting knives;

[0036] Figure 7 for Figure 6 A partial enlarged view of point C in the middle.

[0037] In the figure: 1-shaft body; 2-support pad; 3-first cutter; 31-first support part; 32-first blade part; 33-chip groove; 4-transition part; 41-second support part; 5-second cutter; 51-second blade part; 52-yield part; 6-heating component.

[0038] The thick line on the surface of the support pad in the figure represents the film material, and the axial direction of the shaft corresponds to the width direction of the film. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0040] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0041] Reference Figure 1-3 , a slitting knife assembly, a scissor-type cutting structure configured as a double-slitting knife structure, comprising:

[0042] The cutter structure includes a cutting part that provides cutting action on the film material; a buffer structure is formed on both sides of the film width direction corresponding to the cutting part, and the buffer structure has an action part that deforms toward the rotation axis. The action part provides support for the film while providing deformation space toward the cutting part, and can provide a certain tension force to the film on both sides of the cutting part to improve the flatness of the cutting part.

[0043] The cutter structure is configured as a scissor-type cutting structure with double cutters, which includes a first cutter 3 and a second cutter 5. The first cutter 3 and the second cutter 5 form an axial projection portion that overlaps, that is, the first edge portion 32 of the first cutter 3 and the second edge portion 51 of the second cutter 5 are alternately and staggered during cutting to form a cutting portion, and the two cutter edges have an appropriate horizontal spacing, which does not exceed 5 mm, preferably does not exceed 2 mm.

[0044] Among them, the first cutter 3 is installed on the shaft body 1. In this embodiment, a key connection structure for connecting the cutter is set on the shaft body 1. Of course, the conventional disc-type cutter installation structure in the prior art can also be used, without specific limitation. The shaft body is connected and driven by an external driving structure; the second cutter 5 can also be set as a rotating disc-type cutter structure, or set as a fixed blade-type cutter structure, that is, the blade of the second cutter is fixed and does not rotate. When cutting, just adjust the position of the cutter seat;

[0045] A (rubber) support pad 2 is installed on the shaft body 1 corresponding to the first cutter 3. The first cutter 3 is coaxially arranged with the support pad 2. A cutting groove is formed at the cutting portion corresponding to the support pad 2. The first cutter 3 is arranged in the cutting groove, and the height of the support pad 2 is slightly higher than the outer peripheral edge of the first cutter 3 to avoid scratching the film during rotation. The setting of the support pad 2 also plays a role in supporting the transmission of the film, making the film at the cutting position smoother (drum-type cutter structure); the width D of the cutting groove is set according to the adaptability of the cutter thickness, such as setting it to 5-15mm. In this embodiment, only one cutting groove is shown. According to actual conditions, multiple groups of cutting grooves can be axially arranged on the support pad 2, or multiple (slidably adjustable) matching second cutters 5 can be cooperatively arranged, which should also be covered within the protection scope of this application; when the second cutter is slidably adjustable, its fixed cutter seat can be slidably connected to the corresponding cutter shaft for adjustment, which belongs to the existing conventional technology and its specific structure is not repeated.

[0046] like Figure 2 and Figure 3 The buffer structure includes a first support portion 31 arranged at the outer periphery of the first cutter 3. The first support portion 31 is inclined radially inward and arranged on the outer side (relative to the width direction of the cutting portion) of the first blade portion 32. As an action portion, the inward inclination angle of the first support portion 31 is not greater than the blade inclination angle (back angle), and is preferably smaller than the blade inclination angle; the first support portion 31 has a high degree of finish and can match the speed of the film cutting vehicle to reduce wear;

[0047] Of course, a second support portion 41 may be further provided on the other side of the cutting portion. The second support portion 41 and the second cutter 5 have a horizontal spacing d, which may be a negative value (combined with the adaptive adjustment of the cutter blade), that is, the second support portion 41 is close to the second blade 51, and the spacing should not be too large. The horizontal spacing d is preferably not more than 10 mm. The action surface of the first support portion 31 and / or the second support portion 41 of the action portion may be an inclined plane as shown in the figure, or an arc-shaped transition arc surface; at the same time, since the film and the action portion have similar speeds and remain relatively stationary, they may also be set in a stepped shape, with an arc-shaped transition at the step if necessary. In addition, the first cutter 3 is provided with a chip groove 33 radially inwardly corresponding to the blade portion thereof.

[0048] Through the synergistic effect of the buffer structure and the cutter structure, the cutter will exert pressure on the membrane material during cutting, and the setting of the support part in the buffer structure can make the membrane material at the end realize tension while adapting to the extrusion force of the cutter. Compared with the horizontal action surface in the prior art, the cutting end of the membrane material can provide a larger deformation space, and at the same time, form tension in the width direction of the cutting part of the membrane material, so that the membrane surface is smoother during cutting, and the cutting part is not easily torn due to extrusion.

[0049] Of course, the cutter structure can also be directly set up as a suspended cutting structure (not shown in the figure). In this case, the film to be cut directly passes horizontally through the first cutter 3 and the second cutter 5, and of course, it is necessary to cooperate with other tension rollers to maintain appropriate tension. In this case, the action part of the buffer structure includes the first support part 31 above the first cutter.

[0050] Reference Figure 4-5 , the difference is that the second cutter 5 and the first cutter 3 are provided with a yielding portion 52 at the corresponding cutting portion, so as to cooperate with the first supporting portion to form a gentler film-moving angle of the film material, and also reduce the extrusion and tearing effect of the cutting portion to a certain extent; the yielding portion 52 is an action surface arranged on the side of the second cutter 5 (corresponding to the width direction of the film material), and the angle between it and the film surface is less than 90°. The setting of the yielding portion 52 is also conducive to chip removal.

[0051] In addition, considering that the knife appropriately increases the temperature of the film material to appropriately soften the base film and reduce the polymer base film being more susceptible to tearing and unevenness at low temperatures, a heating component 6 is set in the buffer structure to locally heat the film material at the cutting site.

[0052] At this time, the heating component 6 is configured as an electric heating coil, which is arranged in a groove on the (inner) end face of the first cutter 3, and a wiring harness groove is reserved. The wiring harness can extend from the cavity opened in the middle of the shaft body 1 and be connected through a conductive slip ring.

[0053] Reference Figure 6-7 The main difference is that a single set of cutters is used. At this time, the cutter is basically set in the middle of the cutting groove of the support pad and overlaps with the horizontal projection of the support pad; the two ends of the cutting groove form a first support part and a second support part as the action part.

[0054] At this time, the cutter may also be provided with a chip removal groove (not shown in the figure) on the radial inner side of the cutting portion thereof.

[0055] For the calibration of relevant cutting dimensions, it can be calculated by combining the length of the action part and the overall tilt angle. In actual use, since the overall size of the action part is small and the tilt angle is not large (can be set to no more than 15°), it can be approximately considered that the actual sizes of the two are similar.

[0056] The cutter assembly in the present application can be applied to related slitting equipment, and the width adjustment mechanism and driving mechanism of other related rollers and cutters are the same as the prior art and will not be described in detail.

[0057] In the present application, other structures and connection relationships not described in detail are all prior art, such as the relevant structure of the cooling roller body, whose structure and principle are well-known technologies and will not be repeated here.

[0058] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A slitting knife assembly, comprising a slitting knife structure, wherein a cutting portion is provided in the slitting knife structure to provide a cutting action on a film material, characterized in that: A buffer structure is formed on both sides of the film width direction corresponding to the cutting portion, and the buffer structure has an action part that is deformed obliquely toward the rotation axis.

2. The slitting knife assembly according to claim 1, characterized in that: The action portion comprises an action surface which forms a certain angle with the horizontal plane, and the action surface forms a continuous guiding effect on the width direction of the membrane material.

3. The slitting knife assembly according to claim 2, characterized in that: The cutter structure includes a double cutter structure or a single cutter structure.

4. The slitting knife assembly according to claim 3, characterized in that: The cutter structure includes a first cutter and a second cutter, and the axial projections of the first cutter and the second cutter overlap; the buffer structure includes a first support portion arranged on the outer periphery of the first cutter, the first support portion is inclined inwardly toward the central axis direction and is arranged on the outer side of the first blade relative to the cutting portion width direction, serving as an action portion.

5. The slitting knife assembly according to claim 4, characterized in that: A support pad is arranged corresponding to the first cutter and rotates coaxially. The support pad forms a cutting groove corresponding to the cutting part, and the first cutter is arranged in the cutting groove.

6. The slitting knife assembly according to claim 5, characterized in that: Correspondingly, a second supporting portion is arranged on the other side of the cutting portion, and the second supporting portion is close to the second cutting edge portion.

7. The slitting knife assembly according to claim 6, characterized in that: The second cutter and the first cutter have corresponding cutting parts with a yielding part, which together with the first supporting part form an effective part for film support; the yielding part is an effective surface arranged on the side of the second cutter corresponding to the film material width direction, and the angle between it and the film surface is less than 90°.

8. The slitting knife assembly according to claim 3, characterized in that: A rotating support pad is provided corresponding to the single cutter, the single cutter and the horizontal projection part of the support pad overlap, a cutting groove is provided on the support pad, and the buffer structure includes a first support part and a second support part provided at the top end of the cutting groove as an action part.

9. The slitting knife assembly according to any one of claims 3 to 8, characterized in that: The action surface between the action portion and the film material is a plane, and / or an arc-shaped surface with an arc transition; and / or a stepped surface; and / or, the cutter is provided with a chip removal groove radially inwardly of the cutting edge thereof; And / or, a heating component is provided in the buffer structure.

10. A slitting device, characterized in that: The invention comprises the slitting knife assembly as claimed in claim 9.

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