Double-knife roll cutting and winding device and control method thereof

Abstract

A double-knife winding and cutting device and a control method thereof, comprising a rotary disc, a pressure roller mechanism, a main cutting mechanism, an auxiliary cutting mechanism, a limiting mechanism for adjusting the angle of the auxiliary cutting mechanism, and a winding core; the winding core is installed on the rotary disc; the pressure roller mechanism comprises a pressure roller swing arm and a pressure roller pivotally connected to one end of the pressure roller swing arm and capable of cooperating with the winding core; the main cutting mechanism comprises a mounting plate, a pressure rubber roller pivotally connected to one end of the mounting plate, a pressure rubber cylinder for driving the mounting plate, a cutting cylinder installed on the mounting plate, and a main cutting knife connected with the cutting cylinder; the auxiliary cutting mechanism comprises an auxiliary cutting knife arranged at one end of the pressure roller swing arm. The auxiliary cutting mechanism of the present application is used to contact the material film with the main cutting mechanism during cutting, forming double-knife cutting, and providing a stable and reliable cutting knife device for multi-layer super-thick materials or high-stretchability materials.

Description

Technical Field

[0001] This invention relates to the field of film winding, and in particular to a double-blade winding and cutting device and its control method. Background Technology

[0002] The existing film material winding and cutting method involves pressing the tensioned film material onto the surface of a core roll with adhesive tape using a pressure roller. A swing-arm cutter then cuts the film material into two sections along the direction of travel between the film and the roller (between the pressure roller and the already wound roll). The latter section is then bonded to the winding core with adhesive tape, while the former section is wound up from the old material, thus completing the winding and cutting switch. The existing cutting device has several drawbacks: the material is suspended for a long distance during the winding and cutting process, and when the cutter contacts the film, there is often a cutting misalignment, affecting the cutting effect. This is especially true for thick, multi-layered composite materials, where severe stretching at the cut results in uneven cuts, large local deformation, and uneven new material loading, affecting the quality of the roll bottom. High-elasticity thin materials also exhibit uneven cuts, potentially leading to incomplete cuts or tearing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a double-blade winding and cutting device and its control method, thereby solving the technical problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a double-blade winding and cutting device, comprising a rotary table, a pressure roller mechanism, a main cutting mechanism, an auxiliary cutting mechanism, a limiting mechanism for adjusting the angle of the auxiliary cutting mechanism, and a core; the core is mounted on the rotary table; the pressure roller mechanism includes a pressure roller swing arm and a pressure roller pivotally connected to one end of the pressure roller swing arm and capable of cooperating with the core; the main cutting mechanism includes a mounting plate, a material pressing roller pivotally connected to one end of the mounting plate, a material pressing cylinder for driving the mounting plate, a cutting cylinder mounted on the mounting plate, and a main cutting blade connected to the cutting cylinder; the auxiliary cutting mechanism includes an auxiliary cutting blade disposed at one end of the pressure roller swing arm. The function of the auxiliary cutting mechanism of the present invention is to bring the material film into contact with the main cutting mechanism during cutting, forming a double-blade cut, providing a stable and reliable cutting device for multi-layer ultra-thick materials or high-tensile materials.

[0005] As an improvement, the pressure roller swing arm is rotatably mounted on a turntable, and the auxiliary cutter is fixed to the front end of the pressure roller swing arm by an auxiliary cutter holder.

[0006] As an improvement, the main cutting blade is pivotally connected to the front end of the mounting plate via a main blade holder, and the telescopic rod of the cutting cylinder is connected to the main blade holder.

[0007] As an improvement, the limiting mechanism includes a rotating shaft and a limiting body with multiple different height surfaces connected to the rotating shaft, the limiting body being located below the pressure roller swing arm.

[0008] As an improvement, a blower tube is provided on one side of the cutting position.

[0009] The present invention provides a roll-changing and cutting control method, comprising the following steps:

[0010] (1) When changing rolls, the pressure roller presses the film onto the core under the action of the pressure cylinder;

[0011] (2) Start the main cutting mechanism. The cutting cylinder drives the main cutting blade to approach the auxiliary cutting blade. The film material comes into contact with the auxiliary cutting blade along with the main cutting blade to form a double-blade cutting and complete the film material cutting.

[0012] (3) The rear section of the film material is wrapped around the take-up core, and the front section is taken up by the roll material to complete the roll change.

[0013] As an improvement, the position and angle of the auxiliary cutting mechanism are adjusted by a limiting mechanism according to the different specifications of the core.

[0014] As an improvement, an air blower is provided on one side of the cutting position, and the surface of the core is wrapped with tape with the adhesive side facing outward. The rear section of the film is blown by the air blower and bonded to the winding core by the tape.

[0015] As an improvement, the limiting mechanism includes a rotating shaft and a limiting body with multiple surfaces of different heights connected to the rotating shaft. The limiting body is located below the pressure roller swing arm. By rotating the limiting body, the surfaces of the limiting body at different heights come into contact with the pressure roller swing arm, changing the position and angle of the auxiliary cutting blade.

[0016] As an improvement, the pressure roller does not contact the core during film cutting. The film is only in contact with the pressure roller after it is wound around the core and reaches a certain diameter.

[0017] The beneficial effects of this invention compared to the prior art are:

[0018] 1. An auxiliary cutting blade is designed on the auxiliary cutting mechanism to form a double-blade cutting with the main cutting blade. During the cutting process, the auxiliary cutting blade is fixed, and the main cutting blade makes the film come into contact with it by rapidly swinging, so that it forms a smaller effective cutting space with the double blades. This minimizes the range of tension change of the film from contact with the cutting blade to breakage during the cutting process, making it easier to break.

[0019] 2. By using an auxiliary cutter, the winding and cutting process forms a cutter fulcrum, shortening the suspended length of the material film, instantly increasing the deformation rate of the cutting surface, optimizing the cutting effect, and at the same time reducing the tension transmission range caused by the cutting impact, weakening the influence of winding and cutting tension, and providing a stable and reliable cutter device for multi-layer ultra-thick materials and high tensile materials.

[0020] 3. Reduces the possibility of open or misaligned layers during multi-layer winding and cutting, improving the reliability and success rate of solvent-free composite winding and cutting switching. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the limiting mechanism. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] like Figure 1 As shown, a double-blade winding and cutting device includes a rotary table 1, a pressure roller mechanism 3, a main cutting mechanism 4, an auxiliary cutting mechanism, a limiting mechanism 5 for adjusting the angle of the auxiliary cutting mechanism, and a core 2. In this embodiment, the rotary table 1 is provided with two opposing cores 2, one of which is a working core 2 and the other is a spare core 2. When the working core 2 is wound up, during the roll change, the film material 6 head is cut and wound onto the spare core 2. The pressure roller mechanism 3 includes a pressure roller swing arm 31 and a pressure roller 32 pivotally connected to the front end of the pressure roller swing arm 31 and capable of cooperating with the core 2. The auxiliary cutting mechanism includes an auxiliary cutter 34 disposed at one end of the pressure roller swing arm 31. The auxiliary cutter 34 is fixed to the front end of the pressure roller swing arm 31 by an auxiliary cutter holder 33. The auxiliary cutter holder 33 includes a first L-shaped plate and a second L-shaped plate. The first L-shaped plate can avoid the pressure roller, and the second L-shaped plate allows the auxiliary cutter 34 to be installed at a certain angle. The rear end of the roller swing arm 31 is rotatably connected to the turntable 1. Depending on the different cores 2, the position and angle of the auxiliary cutter 34 can be adjusted by rotating the pressure roller swing arm 31. The pressure roller is located above the core 2. Depending on the different diameter cores 2, the pressure roller 32 and the two roller surfaces of the core 2 can be kept at a certain distance by adjusting the limiting mechanism 5. When the film material 6 is wound around the core 2 and the roll diameter reaches a certain value, the roll surface contacts the pressure roller 32. As the roll diameter increases, it drives the pressure roller swing arm 31 to swing upward. The main cutting mechanism 4 includes a mounting plate 42, a pressure roller 44 pivotally connected to the front end of the mounting plate 42, a pressure cylinder 41 driving the mounting plate 42, a cutting cylinder 43 mounted on the mounting plate 42, and a main cutting blade 46 connected to the cutting cylinder 43. The pressure roller 44 is located on the right side of the core 2, and the pressure roller 44 presses the film material 6 onto the surface of the core 2 under the action of the pressure cylinder 41. The main cutting blade 46 is pivotally connected to the front end of the mounting plate 42 via a main blade holder 45. The main cutting blade 46 swings away from or towards the auxiliary cutting blade 34 via the main blade holder 45. The telescopic rod of the cutting cylinder 43 is connected to the main blade holder 45, and the cutting cylinder 43 drives the main cutting blade 46 to swing via the main blade holder 45. The main cutting blade 46 and the auxiliary cutting blade 34 are arranged opposite each other, forming a double-blade design. Figure 2As shown, the limiting mechanism 5 includes a bracket 53 fixed on the turntable 1, a rotating shaft 52 pivotally connected to the bracket 53, and a limiting body 51 with multiple different height surfaces connected to the rotating shaft 52. In this embodiment, the limiting body 51 is rectangular and has four different height surfaces, which can adjust the four different position angles of the auxiliary cutter 34. Alternatively, a cam structure with stepless adjustment can be used. The limiting body is located below the pressure roller swing arm 31, and at the moment of cutting, the limiting body contacts the pressure roller swing arm 31. A blower pipe 5 is provided on one side of the cutting position. The surface of the core 2 is wrapped with tape, with the adhesive side facing outward. The rear section of the film material 6 is blown by the blower pipe 5 and adhered by the tape, causing the broken material head to move actively and quickly towards the new core 2, avoiding the formation of a reverse folding phenomenon on the surface of the roll, improving the bottom feeding effect, and reducing the formation of waste.

[0025] The present invention provides a roll-changing and cutting method, comprising the following steps:

[0026] (1) When changing rolls, the pressing roller 44 presses the film material 6 onto the core 2 under the action of the pressing cylinder 41;

[0027] (2) Start the main cutting mechanism 4, and the cutting cylinder 43 drives the main cutting blade 46 to approach the auxiliary cutting blade 34. The film material 6 comes into contact with the auxiliary cutting blade 34 along with the main cutting blade 46, forming a double-blade cutting, and completing the cutting of the film material 6.

[0028] (3) After the cutting is completed, the rear section of the film material 6 is pressed onto the core 2 by the pressure roller 44 of the main cutting mechanism and bound by adhesive tape. The front section of the film material 6 is wound up by the roll material to complete the roll change.

Claims

1. A double-blade winding and cutting device, characterized in that: The system includes a rotary table, a pressure roller mechanism, a main cutting mechanism, an auxiliary cutting mechanism, a limiting mechanism for adjusting the angle of the auxiliary cutting mechanism, and a core. The core is mounted on the rotary table. The pressure roller mechanism includes a pressure roller swing arm and a pressure roller pivotally connected to one end of the pressure roller swing arm and capable of cooperating with the core. The main cutting mechanism includes a mounting plate, a pressure roller pivotally connected to one end of the mounting plate, a pressure cylinder driving the mounting plate, a cutting cylinder mounted on the mounting plate, and a main cutting blade connected to the cutting cylinder. The auxiliary cutting mechanism includes an auxiliary cutting blade disposed at one end of the pressure roller swing arm. The pressure roller swing arm is rotatably mounted on the rotary table, and the auxiliary cutting blade is fixed to the front end of the pressure roller swing arm via an auxiliary blade holder. The main cutting blade is pivotally connected to the front end of the mounting plate via a main blade holder, and the telescopic rod of the cutting cylinder is connected to the main blade holder. The limiting mechanism includes a rotating shaft and a limiting body with multiple different height surfaces connected to the rotating shaft, the limiting body being disposed below the pressure roller swing arm. A blower is provided on one side of the cutting position.

2. A control method for the double-blade winding and cutting device as described in claim 1, characterized in that, Includes the following steps: (1) When changing rolls, the pressure roller presses the film onto the core under the action of the pressure cylinder; (2) The cutting cylinder drives the main cutting blade to move, and the film material moves with the main cutting blade and contacts the auxiliary cutting blade to form auxiliary support and double blade cutting, thus completing the film material cutting; (3) The rear section of the film material is wrapped around the take-up core, and the front section is taken up by the roll material to complete the roll change.

3. The control method for a double-blade winding and cutting device according to claim 2, characterized in that: The position and angle of the auxiliary cutting mechanism are adjusted by a limiting mechanism according to the different specifications of the core.

4. The control method for a double-blade winding and cutting device according to claim 2, characterized in that: A blower is provided on one side of the cutting position. The surface of the core is wrapped with tape with the adhesive side facing outwards. The rear section of the film is blown by the blower and adhered to the winding core by the tape.

5. The control method for a double-blade winding and cutting device according to claim 3, characterized in that: The limiting mechanism includes a rotating shaft and a limiting body with multiple surfaces of different heights connected to the rotating shaft. The limiting body is located below the pressure roller swing arm. By rotating the limiting body, the surfaces of the limiting body at different heights come into contact with the pressure roller swing arm, changing the position and angle of the auxiliary cutting blade.

6. The control method for a double-blade winding and cutting device according to claim 2, characterized in that: During the film cutting process, the pressure roller does not contact the core. Once the film is wound around the core and reaches a certain roll diameter, the roll comes into contact with the pressure roller.

Images