Slitting system

Abstract

The embodiment of the invention provides a slitting system which is used for slitting continuous sheet-shaped products and forming independent products, the slitting system comprises a front conveying assembly, a slitting assembly and an adsorption transfer assembly which are sequentially arranged, the slitting assembly comprises a slitting roller and a bottom roller, the adsorption transfer assembly comprises an adsorption transfer wheel provided with an adsorption cylinder, and the adsorption cylinder is arranged on the front conveying assembly. The adsorption barrel and the bottom roller are arranged at intervals to form a gap area, the size of the gap area is smaller than or equal to the thickness of a sheet-shaped product, and the product is effectively prevented from tilting in the slitting process through the negative pressure adsorption effect of the adsorption barrel and the clamping effect of the adsorption barrel and the bottom roller. And the slit product is subjected to reverse bending action and extrusion arrangement of a gap area, so that a flat state is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to a slitting system. BACKGROUND

[0002] In the field of household paper, it is necessary to slit continuous sheet products into independent products, such as when preparing sanitary napkins, paper diapers, breast pads, nursing pads, it is necessary to slit continuous cores into independent cores, or slit continuous products into independent products.

[0003] The existing slitting device is generally shown in document CN212471711U, which is provided with conveying devices on both sides of the slitting device for respectively feeding the slitting assembly and conveying the slitted individual products in the downstream direction, but it is found in practice that these conventional slitting devices are prone to edge lifting, more specifically, due to the vertical downward force of the cutter, the slitted products are prone to edge lifting under their own stress, therefore, the anti-edge lifting slitting device is specifically proposed in document CN214569611U, which is provided with an air comb, and the air comb blows air through the air nozzle to exert a longitudinal spreading effect to reduce the edge lifting phenomenon.

[0004] However, this method is generally only suitable for relatively thin products, and its effect is not obvious for relatively thick products with a large width, such as nursing pads and cores, adult paper diapers and cores, at the same time, for cores covered with toilet paper, the airflow effect during the slitting process is prone to cause the covering layer to spread, therefore, a slitting device capable of preventing edge lifting for thicker products is needed. SUMMARY

[0005] Therefore, the present application provides a slitting system to solve the above technical problems.

[0006] A slitting system, comprising a front conveying assembly, a slitting assembly, and an adsorption and transfer assembly, characterized in that: The front conveying assembly is used to convey sheet products to the slitting assembly; The slitting assembly comprises a slitting roller and a bottom roller, and is used for slitting sheet products; The adsorption and transfer assembly is arranged downstream of the slitting assembly and comprises an adsorption and transfer wheel, the adsorption and transfer wheel comprises an adsorption cylinder arranged in a spaced manner with the bottom roller and forming a gap area, and the adsorption cylinder comprises an adsorption surface in a negative pressure state; The gap area is less than or equal to the thickness of the sheet product, and when the sheet product passes through the gap area, the slitting roller slits the sheet product, and the adsorption surface adsorbs and holds the sheet product.

[0007] The adsorption cylinder comprises a cylinder wall and a containing space formed by the cylinder wall, the cylinder wall comprises a plurality of through holes penetrating through the cylinder wall, an adsorption assembly is arranged in the containing space, the adsorption assembly comprises an adsorption port facing the cylinder wall, the adsorption surface is an outer surface of the cylinder wall corresponding to the adsorption port, the adsorption assembly comprises a pair of side walls and a first partition plate and a second partition plate connected with the pair of side walls, the pair of side walls and the first partition plate and the second partition plate form an adsorption cavity, and the adsorption cavity is in a negative pressure state.

[0008] The front conveying assembly comprises a front conveying surface, a base surface is defined to be tangent to the bottom roller and parallel to the front conveying surface, and the adsorption surface is separated from the base surface.

[0009] The outer surface of the cylinder wall comprises a transfer surface between the adsorption surface and the base surface, and the width of the transfer surface is greater than or equal to 2 cm.

[0010] The first partition plate comprises a first inner surface, the first inner surface is parallel to the base surface, and the first inner surface is located between the gap area and the base surface.

[0011] The outer diameter of the bottom roller is greater than the outer diameter of the slitting roller.

[0012] The width of the gap area is adjustable.

[0013] The adsorption and transfer assembly further comprises a displacement assembly for adjusting the position of the adsorption and transfer wheel, the displacement assembly comprises a support and an actuator for driving the support to move in a first direction, and the first direction is inclined to the base surface.

[0014] The first direction and the base surface have an included angle of 15°-35°.

[0015] A rear conveying assembly is further arranged downstream of the adsorption and transfer assembly, the rear conveying assembly comprises a rear conveying surface, the rear conveying surface is parallel to the first direction, and the second partition plate comprises a second inner surface, and the second inner surface is perpendicular to the rear conveying surface.

[0016] Beneficial effects: the embodiment of the application provides a slitting system for slitting a continuous sheet product and forming independent products, the slitting system comprises a front conveying assembly, a slitting assembly and an adsorption and transfer assembly arranged in sequence, the slitting assembly comprises a slitting roller and a bottom roller, the adsorption and transfer assembly comprises an adsorption and transfer wheel provided with an adsorption cylinder, the adsorption cylinder is arranged at intervals with the bottom roller to form a gap area, the size of the gap area is less than or equal to the thickness of the sheet product, and the product is effectively inhibited from being warped in the slitting process through the negative pressure adsorption effect of the adsorption cylinder and the clamping effect of the adsorption cylinder and the bottom roller; the product is arranged flat after slitting through the reverse bending effect and the extrusion of the gap area. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A schematic diagram of the slitting system of the present embodiment; Figure 2 A simplified schematic diagram of the slitting system of the present embodiment; Figure 1 A schematic diagram of the displacement assembly in the slitting system of the present embodiment; Figure 3 Figure 1 A schematic diagram of the displacement assembly in the slitting system of the present embodiment; Figure 4 A schematic diagram of the adsorption transfer wheel in the slitting system of the present embodiment; Figure 2 A schematic diagram of the displacement assembly in the slitting system of the present embodiment; Figure 5 Figure 2 A schematic diagram of the displacement assembly in the slitting system of the present embodiment; Figure 6 A schematic diagram of the displacement assembly in the slitting system of the present embodiment; Element illustration: Front conveying assembly 10; front conveying surface 11; slitting assembly 20; slitting roller 21; bottom roller 22; central axis 220; gap area 221; base surface 23; adsorption transfer assembly 30; adsorption transfer wheel 31; adsorption cylinder 311; adsorption surface 3111; upper area 3111a; transfer surface 3112; adsorption assembly 312; adsorption cavity 3120; first partition 3121; first inner surface 3121a; second partition 3122; second inner surface 3122a; adsorption port 3123; displacement assembly 32; support 321; actuating device 322; first direction 323; rear conveying assembly 40; rear conveying surface 41; first sheet product 51; first head end 511; first tail end 512; second sheet product 52; second head end 521. DETAILED DESCRIPTION

[0018] Please refer to Figures 1-6 , the present embodiment provides a slitting system for slitting continuous sheet products to form independent sheet products, which can be absorbent cores, sanitary napkins, paper diapers, nursing pads, breast pads, and cotton wipes, etc., without limitation.

[0019] The slitting system comprises a front conveying assembly 10, a slitting assembly 20, and an adsorption transfer assembly 30.

[0020] The front conveying assembly 10 is used to receive and convey sheet products from an upstream process. In the present embodiment, the front conveying assembly 10 is a clamping conveying device, which allows the sheet products to be conveyed in a clamped state during conveying, so that the sheet products can enter the slitting assembly 20 stably, and at the same time, the sheet products can be kept stable during slitting.

[0021] ​​The slitting assembly 20 is arranged downstream of the front conveying assembly 10, and includes a slitting roller 21 and a bottom roller 22, which are used for slitting the sheet product to form independent sheet products from the continuous sheet product. The slitting roller 21 includes a plurality of cutter devices, and the bottom roller 22 is configured to rotate about a central axis 220.

[0022] The adsorption transfer assembly 30 is arranged downstream of the slitting assembly 20, and includes an adsorption transfer wheel 31, which includes an adsorption cylinder 311. The adsorption cylinder 311 includes a cylinder wall and an accommodation space formed by the cylinder wall. The cylinder wall includes a plurality of through holes, and an adsorption assembly 312 is arranged in the accommodation space. The adsorption assembly 312 includes an adsorption port 3123 facing the cylinder wall, so as to form a negative pressure at the cylinder wall. In this embodiment, the adsorption assembly 312 includes a pair of side walls and a first partition plate 3121 and a second partition plate 3122 connected to the pair of side walls. The pair of side walls, the first partition plate 3121 and the second partition plate 3122 form an adsorption cavity 3120. The adsorption cavity 3120 is configured to be connected to a negative pressure device, so as to be in a negative pressure state, and form a negative pressure at the cylinder wall through the adsorption port 3123. It can be understood that the cylinder wall includes an adsorption surface 3111 corresponding to the adsorption port 3123, and the adsorption surface 3111 is in a negative pressure state under the action of the adsorption port 3123. When the sheet product is attached to the adsorption surface 3111, the sheet product can be stably maintained in the attached state under the action of the negative pressure. It can be understood that the adsorption surface 3111 is part of the outer surface of the cylinder wall, and the adsorption surface 3111 is a region of the outer surface of the cylinder wall corresponding to the adsorption port 3123. It can be understood that the other regions of the outer surface of the cylinder wall should not be subjected to the negative pressure action.

[0023] It can be understood that the adsorption port 3123 is arc-shaped, so that the adsorption port 3123 can form a uniform negative pressure at the adsorption surface 3111.

[0024] It can be understood that the adsorption cylinder 311 is configured to rotate about its rotation axis, and the adsorption assembly 312 is maintained at a predetermined position, so as to continuously form a negative pressure at the adsorption surface 3111 corresponding to the adsorption port 3123.

[0025] The adsorption cylinder 311 is arranged in a spaced manner with the bottom roller 22 and forms a gap region 221, which is less than or equal to the thickness of the sheet product. When the sheet product passes through the gap region 221, the slitting roller 21 performs slitting on the sheet product, and the adsorption surface 3111 adsorbs and maintains the sheet product in the attached state.

[0026] The adsorption cylinder 311 is arranged apart from the bottom roller 22 and forms a gap area 221, the size of the gap area 221 is less than or equal to the thickness of the sheet product. When the sheet product passes through the gap area 221, the slitting roller 21 slits the sheet product, and at the same time, the adsorption surface 3111 of the adsorption cylinder 311 adsorbs and holds the sheet product.

[0027] Specifically, the sheet product is conveyed by the front conveying assembly 10 to the slitting assembly 20 and is slit by the slitting assembly 20 to form a first sheet product 51 and a second sheet product 52. In this process, the first head end 511 of the first sheet product 51 is adsorbed and moved with the adsorption cylinder 311 and attached to the adsorption surface 3111 after contacting the adsorption cylinder 311, and at the same time, enters the gap area 221 and is clamped by the adsorption cylinder 311 and the bottom roller 22. Subsequently, the slitting roller 21 applies a cutting force from top to bottom to form a first tail end 512 of the first sheet product 51 and a second head end 521 of the second sheet product 52.

[0028] It can be seen that through the adsorption of the adsorption cylinder 311 and the clamping of the adsorption cylinder 311 and the bottom roller 22, the main body of the sheet product is effectively constrained during the slitting process, thereby inhibiting the lifting phenomenon caused by the cutting force, ensuring smooth and accurate slitting action, avoiding product deformation or misplacement, in addition, after slitting, the second head end 521 of the second sheet product 52 moves with the adsorption cylinder 311 and experiences a bending action in the opposite lifting direction; at the same time, when passing through the gap area 221, it is pressed and arranged by the adsorption cylinder 311 and the bottom roller 22, further eliminating residual lifting, making the sheet product as a whole form a flat state, improving the appearance and quality consistency of the product, that is, during the slitting process, the adsorption cylinder 311 and the bottom roller 22 can effectively limit the position of the sheet product to prevent the sheet product from lifting, and at the same time, the gap area 221 of the adsorption cylinder 311 and the bottom roller 22 forms an arrangement effect to arrange the sheet product and thus ensures the flatness of the product. In actual tests, compared with the slitting device shown in CN212471711U, the product lifting phenomenon is reduced by more than 60%.

[0029] Further, the front conveying assembly 10 comprises a front conveying surface 11, defining a base surface 23 tangent to the bottom roller 22, and parallel to the front conveying surface 11, and the suction surface 3111 is separated from the base surface 23, and more specifically, the outer surface of the cylinder wall comprises a transition surface 3112 between the suction surface 3111 and the base surface 23, and it can be understood that the transition surface 3112 is not subjected to the negative pressure of the suction port 3123, so that the first sheet product 51 passing through the slitting assembly 20 is not immediately sucked by the suction surface 3111, preventing the first sheet product 51 from being sucked by the suction surface 3111 on the side of the surface of the bottom roller 22, thereby causing the first sheet product 51 to form a blockage between the suction cylinder 311 and the slitting assembly 20 or causing the first sheet product 51 to wrinkle.

[0030] Further, the transition surface 3112 has a width greater than or equal to 2 cm.

[0031] Further, the first partition 3121 comprises a first inner surface 3121a, which is parallel to the base surface 23, and the first inner surface 3121a is located between the gap region 221 and the base surface 23, so that the suction surface 3111 has an upper region 3111a on the upper side of the gap region 221, and due to the negative pressure of the suction cavity 3120, part of the airflow flows downward through the upper region 3111a, i.e., through the upper region 3111a, so that at least part of the airflow flows from the upper side to the lower side of the first sheet product 51, thereby causing the first sheet product 51 to bend downward when passing through the slitting assembly 20 under the action of the airflow, thereby enabling the first sheet product 51 to smoothly enter the suction surface 3111 and the gap region 221, forming a bending action in the opposite direction of the curling.

[0032] Further, the outer diameter of the bottom roller 22 is greater than the outer diameter of the slitting roller 21, and the outer diameter of the slitting roller 21 refers to the distance between the blade of the cutter and the rotation axis of the slitting roller 21 when the cutter is arranged on the slitting roller 21, and by setting the outer diameter of the bottom roller 22 to be greater than the outer diameter of the slitting roller 21, on the one hand, the suction cylinder 311 can more easily form the gap region 221 with the bottom roller 22, avoiding interference with the slitting roller 21, and on the other hand, the outer diameter of the slitting roller 21 is relatively lower, so that the airflow formed on the upper side of the bottom roller 22 can more easily flow to the upper region 3111a, pressing the first sheet product 51 to bend.

[0033] Further, the adsorption and transfer assembly 30 further comprises a displacement assembly 32 configured to adjust the position of the adsorption and transfer wheel 31, the displacement assembly 32 comprises a support 321 and an actuator 322 configured to drive the support 321 to move, wherein the adsorption and transfer wheel 31 is arranged on the support 321, and the actuator 322 is configured to drive the support 321 to move along a first direction 323, so as to adjust the position of the adsorption and transfer wheel 31, and more specifically, by adjusting the position of the adsorption and transfer wheel 31 to adjust the width of the gap area 221, so as to on one hand adapt to the sheet product with different thickness, and on the other hand adjust the pressure of the sheet product by the adsorption cylinder 311 during the slitting process of the sheet product by the slitting roller 21, so as to ensure the flatness of the sheet product.

[0034] Further, the first direction 323 is inclined to the base surface 23, that is, the displacement assembly 32 adjusts the position of the adsorption and transfer wheel 31 along a direction inclined to the base surface 23, and by being arranged in an inclined manner, the width of the transfer surface 3112 and the size of the upper area 3111a can be further adjusted, so as to match the sheet product with different thickness.

[0035] Further, the first direction 323 and the base surface 23 have an included angle of 15°-35°.

[0036] Further, downstream of the adsorption and transfer assembly 30, a rear conveying assembly 40 is further arranged, the rear conveying assembly 40 comprises a rear conveying surface 41, the rear conveying surface 41 is arranged adjacent to the outer surface of the cylinder wall, and is used to receive the sheet product which is slitted by the slitting assembly 20 and arranged by the adsorption and transfer assembly 30.

[0037] Further, the rear conveying surface 41 comprises a receiving area adjacent to the cylinder wall, the receiving area is arranged corresponding to the second partition 3122, when the sheet product attached to the adsorption surface 3111 rotates to the receiving area, the sheet product is caused to fall off from the outer surface of the cylinder wall and transfer to the receiving area due to the loss of adsorption, and is conveyed to the downstream direction by the rear conveying assembly 40.

[0038] It can be understood that the rear conveying assembly 40 is provided with a negative pressure cavity, so that the receiving area is in a negative pressure state, so that the sheet product can easily fall off from the outer surface of the cylinder wall and transfer to the receiving area.

[0039] Further, the rear conveying surface 41 is inclined to the base surface 23 and parallel to the first direction 323, so that the distance between the rear conveying surface 41 and the adsorption and transfer wheel 31 remains unchanged during the movement of the adsorption and transfer wheel 31.

[0040] Further, the second partition 3122 includes a second inner surface 3122a which is perpendicular to the rear conveying surface 41 to further guide the air flow and ensure smooth transfer of the product.

[0041] The above description is merely an embodiment of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. A slitting system, comprising a front conveying assembly, a slitting assembly, and an adsorption-transfer assembly, characterized in that: The front conveyor assembly is used to feed sheet-like products to the slitting assembly; The slitting assembly, including a slitting roller and a bottom roller, is used for slitting sheet products. An adsorption transfer assembly is located downstream of the slitting assembly and includes an adsorption transfer wheel. The adsorption transfer wheel includes an adsorption cylinder that is spaced apart from the bottom roller and forms a gap area. The adsorption cylinder includes an adsorption surface under negative pressure. The gap area is less than or equal to the thickness of the sheet product, and when the sheet product passes through the gap area, the slitting roller slits the sheet product, while the adsorption surface adsorbs and keeps the sheet product attached.

2. The slitting system as described in claim 1, characterized in that, The adsorption cylinder includes a cylinder wall and a receiving space formed by the cylinder wall. The cylinder wall includes several through holes penetrating the cylinder wall. An adsorption assembly is disposed in the receiving space. The adsorption assembly includes an adsorption port facing the cylinder wall. The adsorption surface is the outer surface of the cylinder wall corresponding to the adsorption port. The adsorption assembly includes a pair of sidewalls and a first partition and a second partition connecting the pair of sidewalls. The pair of sidewalls, the first partition, and the second partition form an adsorption cavity. The adsorption cavity is under negative pressure.

3. The slitting system as described in claim 2, characterized in that, The aforementioned front conveying assembly includes a front conveying surface. A base surface is defined that is tangent to the bottom roller and parallel to the front conveying surface. In this case, the adsorption surface is separated from the base surface.

4. The slitting system as described in claim 3, characterized in that, The outer surface of the cylinder wall includes a transfer surface between the adsorption surface and the base surface, and the width of the transfer surface is greater than or equal to 2 cm.

5. The slitting system as described in claim 4, characterized in that, The first partition includes a first inner surface, which is parallel to the base surface and is located between the gap area and the base surface.

6. The slitting system as described in claim 5, characterized in that, The outer diameter of the bottom roller is larger than the outer diameter of the slitting roller.

7. The slitting system as described in claim 5, characterized in that, The width of the gap area is adjustable.

8. The slitting system as described in claim 7, characterized in that, The adsorption transfer assembly further includes a displacement assembly for adjusting the position of the adsorption transfer wheel. The displacement assembly includes a support and an actuating device for driving the support to move along a first direction, which is inclined to the base surface.

9. The slitting system as described in claim 8, characterized in that, The first direction has an angle of 15°-35° with the base plane.

10. The slitting system as described in claim 8, characterized in that, A downstream conveying assembly is provided in the adsorption and transfer assembly. The downstream conveying assembly includes a downstream conveying surface that is parallel to the first direction, and the second partition includes a second inner surface that is perpendicular to the downstream conveying surface.

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