Pneumatic slitting cutter with wear-resistant cutter and non-woven fabric slitting and winding machine thereof

Abstract

The utility model relates to a pneumatic slitting knife with a wear-resistant cutter and a non-woven fabric slitting and winding machine thereof, the pneumatic slitting knife with the wear-resistant cutter comprises a circular blade and a circular knife holder, a cutting edge on the outer side of the blade abuts against the outer side wall of the knife holder, and non-woven fabric is arranged between the blade and the knife holder to be cut off. An annular groove is formed in the side wall of the tool apron; the width of the groove is 0.4-0.8 mm larger than that of the cutting edge of the blade; the groove is over against the cutting edge of the blade; and the cutting edge of the blade is tangent to the outer side wall of the tool apron or inserted into the groove. Due to the arrangement of the groove, the non-woven fabric can be cut off under the condition that the cutting edge of the blade does not make contact with the tool apron, so that the cutting edge of the blade is prevented from making hard contact with the tool apron, and the cutting edge of the blade can be abraded only when the non-woven fabric is cut.

Description

Technical Field

[0001] The utility model relates to the technical field of slitting and cloth-winding machines, in particular to a pneumatic slitting knife with a wear-resistant cutter and a non-woven fabric slitting and cloth-winding machine thereof. Background Art

[0002] Pneumatic slitting knives are used in non-woven fabric slitting and winding machines due to their high precision, high efficiency, high safety, energy saving and environmental protection, to cut non-woven fabrics into set widths.

[0003] The pneumatic slitting knife generally includes a blade and a knife holder. The blade abuts against the knife holder, and the non-woven fabric is placed between the blade and the knife holder, thereby cutting the non-woven fabric.

[0004] In the above-mentioned traditional structure, the hard contact between the blade and the blade holder easily leads to wear of the blade edge, and the blade needs to be replaced frequently, which is not only costly but also requires downtime during the replacement process, thus seriously affecting production efficiency. Utility Model Content

[0005] In order to solve the technical problems in the background technology, the utility model discloses a pneumatic slitting knife with a wear-resistant cutting knife and a non-woven fabric slitting and winding machine thereof.

[0006] The utility model provides a pneumatic slitting knife with a wear-resistant cutter, comprising a circular blade and a circular knife seat, wherein the outer edge of the blade abuts against the outer wall of the knife seat, a nonwoven is arranged between the blade and the knife seat for cutting, and the side wall of the knife seat is provided with an annular groove;

[0007] The width of the groove is 0.4-0.8mm greater than the width of the blade edge;

[0008] The groove faces the cutting edge of the blade;

[0009] The cutting edge of the blade is tangent to the outer side wall of the blade seat or inserted into the groove.

[0010] The beneficial effects of the above-mentioned setting are: 1. The setting of the groove enables the blade edge to cut the non-woven fabric without contact with the knife seat, thereby avoiding hard contact between the blade edge and the knife seat. The blade edge will only wear when cutting the non-woven fabric. The non-woven fabric is soft, and the wear rate of the blade edge is greatly reduced, thereby extending the service life of the blade, shortening the downtime of the slitting and winding machine, and improving production efficiency; 2. The relative position setting of the blade and the knife seat enables the blade to stably cut the non-woven fabric.

[0011] If the blade edge is inserted too deeply into the groove, the deformation of the non-woven fabric at the groove position will be too large, which will reduce the accuracy of the non-woven fabric width. Based on this, further improvement is that when the blade edge is inserted into the groove, its insertion depth is less than 0.5mm.

[0012] Since the groove width is small, it is difficult to directly form it into one piece. Based on this, further improvements are made: the tool holder includes a base and a limit plate with the same diameter and coaxial arrangement, and a plurality of evenly distributed locking bolts pass through the limit plate and are threadedly connected to the base to achieve the connection and fixation of the base and the limit plate; a boss is provided at the center position of one side of the limit plate; the boss abuts against the base, so that the outer area of ​​the base and the limit plate constitute a groove.

[0013] In order to improve the connection position accuracy between the base and the limiting plate, a further design is: a positioning column is provided at the center of the base; a positioning hole is provided at the center of the limiting plate, and the positioning hole is sleeved with the positioning column.

[0014] Since the slitting and winding machine will vibrate during operation, which may easily cause the locking bolt to loosen, the traditional structure is to add an elastic washer at the connection between the locking bolt and the limit plate; however, the elastic washer has low elasticity and is also prone to plastic deformation. Based on this, further improvements are made: multiple tightening bolts are also threadedly connected to the limit plate; a disc spring is installed on the base; the threaded end of the tightening bolt passes through the limit plate, abuts against the disc spring, and causes the disc spring to deform.

[0015] The disc spring directly rests against the side of the base, which makes installation difficult and the position unstable. Based on this, a further improvement is that a recessed installation groove is provided on the side of the base facing the limit plate; the disc spring is placed in the installation groove.

[0016] Since the position of the disc spring in the installation groove is still unstable and prone to radial movement, a further improvement is made based on this: a mounting rod is further provided in the installation groove; and the disc spring is sleeved on the mounting rod.

[0017] When the tightening bolt tightens the disc spring, it is easy to abut against the mounting rod, making the disc spring ineffective. Based on this, further improvements are: the threaded end of the tightening bolt is provided with a coaxially arranged avoidance groove; the avoidance groove covers the mounting rod; the part of the tightening bolt located outside the avoidance groove abuts against the disc spring.

[0018] The utility model also discloses a non-woven fabric slitting and winding machine, which includes a pneumatic slitting knife with a wear-resistant cutting knife. With such an arrangement, the non-woven fabric slitting and winding machine can operate stably for a longer period of time and has a higher production efficiency.

[0019] The beneficial effects of the present invention are: 1. The setting of the groove enables the cutting edge of the blade to cut the non-woven fabric without contacting the knife seat, thereby avoiding hard contact between the cutting edge of the blade and the knife seat. The cutting edge of the blade will only wear when cutting the non-woven fabric. The non-woven fabric is relatively soft, and the wear rate of the cutting edge of the blade is greatly reduced, thereby extending the service life of the blade, shortening the downtime of the slitting and winding machine, and improving production efficiency; 2. The relative position setting of the blade and the knife seat enables the blade to cut the non-woven fabric stably; 3. The width setting of the groove makes the deformation of the non-woven fabric at the groove position small, which will not affect the accuracy of the width of the non-woven fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 It is a top view of the utility model;

[0023] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 It is a structural diagram of the knife holder;

[0025] Figure 5 This is the main view of the knife holder;

[0026] Figure 6 yes Figure 5 Cross-sectional view of CC;

[0027] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0028] Figure 8 yes Figure 5 Cross-sectional view of the middle DD;

[0029] In the figure: 1. Blade; 2. Blade holder; 3. Groove; 4. Base; 5. Limit plate; 6. Locking bolt; 7. Boss; 8. Positioning column; 9. Positioning hole; 10. Tightening bolt; 11. Disc spring; 12. Mounting slot; 13. Mounting rod; 14. Avoidance slot. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0031] Example 1:

[0032] like Figure 1 and Figure 2 As shown, the utility model discloses a pneumatic slitting knife with a wear-resistant cutter, comprising a circular blade 1 and a circular knife seat 2, wherein the axis of the blade 1 is parallel to the axis of the knife seat 2. The outer edge of the blade 1 abuts against the outer wall of the knife seat 2, and a nonwoven is arranged between the blade 1 and the knife seat 2 for cutting.

[0033] The side wall of the blade seat 2 is provided with an annular groove 3 ; the width of the groove 3 is 0.4-0.8 mm greater than the width of the cutting edge of the blade 1 , and the groove 3 faces the cutting edge of the blade 1 .

[0034] Since the groove 3 has a small width, it is difficult to directly form it into one piece. Therefore, the following design is made: Figure 4-8 As shown, the tool holder 2 includes a base 4 and a stop plate 5 of identical diameter and coaxial arrangement. Multiple evenly spaced locking bolts 6 pass through the stop plate 5 and are threadedly connected to the base 4, securing the two. A boss 7 is provided at the center of one side of the stop plate 5; the boss 7 abuts the base 4, forming a groove 3 between the outer areas of the base 4 and the stop plate 5.

[0035] A positioning post 8 is provided at the center of the base 4; a positioning hole 9 is provided at the center of the limiting plate 5, thereby achieving installation and limiting of the limiting plate 5, thereby improving the positioning accuracy of the limiting plate 5. The end of the positioning post 8 is provided with an outer chamfer for the positioning hole 9 to be inserted into the positioning post 8 for guidance.

[0036] Since the slitting and winding machine generates vibrations during operation, which can easily cause the locking bolt 6 to loosen, the traditional structure is to add an elastic washer at the connection between the locking bolt 6 and the limit plate 5. However, the elastic washer has low elasticity and is also prone to plastic deformation. Therefore, a recessed mounting groove 12 is provided on the side of the base 4 facing the limit plate 5, and a coaxially arranged mounting rod 13 is provided in the mounting groove 12. The disc spring 11 is placed in the mounting groove 12 and is sleeved with the mounting rod 13, which not only realizes the installation and limitation of the disc spring 11, but also makes it difficult for the disc spring 11 to fall out of the mounting groove 12. The threaded end of the tightening bolt 10 passes through the limit plate 5, abuts against the disc spring 11, and causes the disc spring 11 to deform. Since the disc spring 11 has high elasticity and is not prone to plastic deformation, the structure of the knife holder 2 is more stable, and the structure of the groove 3 is also more stable.

[0037] The threaded end of the jacking bolt 10 is provided with a coaxially arranged escape groove 14; the escape groove 14 covers the mounting rod 13; the portion of the jacking bolt 10 outside the escape groove 14 abuts against the disc spring 11. This arrangement prevents the threaded end of the jacking bolt 10 from directly abutting against the mounting rod 13, rendering the disc spring 11 ineffective.

[0038] The cutting edge of blade 1 is tangential to the outer wall of blade holder 2 or inserted into groove 3, allowing the cutting edge of blade 1 and blade holder 2 to cut the non-woven fabric without contact, thus avoiding hard contact between the cutting edge of blade 1 and blade holder 2. The cutting edge of blade 1 only wears when cutting the non-woven fabric. Non-woven fabric is relatively soft, so the wear rate of the cutting edge of blade 1 is greatly reduced, thereby extending the service life of blade 1, shortening the downtime of the slitting and winding machine, and improving production efficiency. In addition, the relative positioning of blade 1 and blade holder 2 enables blade 1 to stably cut the non-woven fabric.

[0039] like Figure 3 As shown, when the cutting edge of the blade 1 is inserted into the groove 3, its insertion depth is less than 0.5 mm. This arrangement is used to prevent the cutting edge of the blade 1 from being inserted too deeply into the groove 3, resulting in excessive deformation of the non-woven fabric at the groove 3 position, thereby reducing the accuracy of the non-woven fabric width.

[0040] Example 2:

[0041] The utility model also discloses a non-woven fabric slitting and winding machine, which includes a pneumatic slitting knife with a wear-resistant cutting knife. With such an arrangement, the non-woven fabric slitting and winding machine can operate stably for a longer period of time and has a higher production efficiency.

[0042] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A pneumatic slitting knife with a wear-resistant cutter, comprising a circular blade (1) and a circular knife seat (2), wherein the outer edge of the blade (1) abuts against the outer wall of the knife seat (2), and a nonwoven is arranged between the blade (1) and the knife seat (2) for cutting, characterized in that: The side wall of the knife seat (2) is provided with an annular groove (3); The width of the groove (3) is 0.4-0.8 mm greater than the width of the cutting edge of the blade (1); The groove (3) faces the cutting edge of the blade (1); The cutting edge of the blade (1) is tangent to the outer side wall of the blade seat (2) or inserted into the groove (3).

2. The pneumatic slitting knife with a wear-resistant cutter according to claim 1, characterized in that: When the cutting edge of the blade (1) is inserted into the groove (3), the insertion depth is less than 0.5 mm.

3. The pneumatic slitting knife with a wear-resistant cutter according to claim 1, characterized in that: The knife seat (2) comprises a base (4) and a limiting plate (5) with the same diameter and coaxial arrangement, and a plurality of evenly distributed locking bolts (6) pass through the limiting plate (5) and are threadedly connected to the base (4), thereby achieving a connection and fixation between the base (4) and the limiting plate (5); A boss (7) is provided at the center of one side of the limiting plate (5); The boss (7) abuts against the base (4), so that the outer area of ​​the base (4) and the limiting plate (5) form a groove (3).

4. The pneumatic slitting knife with a wear-resistant cutter according to claim 3, characterized in that: A positioning column (8) is provided at the center of the base (4); A positioning hole (9) is provided at the center of the limiting plate (5), and the positioning hole (9) is sleeved with the positioning column (8) in a tight fit manner.

5. The pneumatic slitting knife with a wear-resistant cutter according to claim 4, characterized in that: The limiting plate (5) is also threadedly connected with a plurality of tightening bolts (10); A disc spring (11) is installed on the base (4); The threaded end of the tightening bolt (10) passes through the limiting plate (5), abuts against the disc spring (11), and causes the disc spring (11) to deform.

6. The pneumatic slitting knife with a wear-resistant cutter according to claim 5, characterized in that: A recessed mounting groove (12) is provided on one side of the base (4) facing the limiting plate (5); The disc spring (11) is placed in the mounting groove (12).

7. The pneumatic slitting knife with a wear-resistant cutter according to claim 6, characterized in that: A mounting rod (13) is also provided in the mounting groove (12); The disc spring (11) is sleeved on the mounting rod (13).

8. The pneumatic slitting knife with a wear-resistant cutter according to claim 7, characterized in that: The threaded end of the tightening bolt (10) is provided with a coaxially arranged avoidance groove (14); The avoidance groove (14) covers the mounting rod (13); The portion of the tightening bolt (10) located outside the avoidance groove (14) abuts against the disc spring (11).

9. A non-woven fabric slitting and winding machine, characterized in that: The pneumatic slitting knife with a wear-resistant cutter comprises the pneumatic slitting knife according to any one of claims 1 to 8.

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