An adhesive non-stop unwind machine

Abstract

The present invention discloses a non-stop unwind machine for self-adhesive labels, which comprises a double-station unwind device, a first material receiving device and a second material receiving device connected in sequence. The second material receiving device includes a frame and a pressure roller and a bottom roller arranged up and down on the frame. A lifting mechanism is connected to the pressure roller. A composite tape roll is arranged on the pressure roller. When the composite tape roll is unwound, it includes multiple single-sided tapes arranged continuously and at intervals. A double-sided silicone release paper is lapped on the silicone oil surfaces of two adjacent single-sided tapes. When the composite tape roll is wound up, the adhesive surface of the single-sided tape faces outward. The second material receiving device is used for adhesively fixing the plain paper surface at the end of the front roll of single silicone release paper and the plain paper surface at the head of the rear roll of single silicone release paper through the single-sided tape. It is ensured that when the single silicone release paper enters the oven for drying after being coated with glue, the material receiving part is not prone to tape breakage under the traction force in the oven, realizing non-stop continuous production, improving production efficiency and reducing production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of self - adhesive, and in particular to a self - adhesive non - stop unwind machine. Background Art

[0002] The self - adhesive is composed of a surface layer, an adhesive layer, and a base material. The main process of manufacturing self - adhesive materials is to coat glue on the base material with a coater to form a backing paper. After the backing paper is dried, it is laminated with the fabric layer to form a finished product. In the Chinese patent with the publication number CN216945487U, a double - station non - stop rewinder is disclosed, which includes a frame and a bracket. A turntable is provided on the frame, and a first power device is used to drive the turntable to rotate to realize station alternation. The bracket is hinged with a swing arm, and a second power device is also provided on the bracket to drive the swing arm to swing for cutting and receiving materials. Moreover, the bracket can be arranged close to or away from the frame. By moving the bracket, the swing arm is driven to approach or move away from the turntable. Thus, for a large - diameter coil material, the swing arm can move away from the turntable so that during the process of the swing arm swinging for receiving and cutting materials, it will not interfere with the coil material; for a small - diameter coil material, the swing arm can approach the turntable so that the swing of the swing arm can touch the coil material and perform receiving and cutting. This double - station non - stop rewinder can realize the non - stop feeding of the base material and improve production efficiency.

[0003] In production, the base material generally uses single - silicon release paper (one side is a plain paper surface, and the other side is a silicone oil surface, also called a release surface or a low - adhesion surface). Two rolls of single - silicon release paper are joined by a double - sided tape. The double - sided tape is a tape with a glue surface on both sides of a base material (such as cotton paper). The single - sided tape is a tape with a glue surface on one side and a silicone oil surface on the other side of a base material (such as cotton paper). Since the double - sided tape contacts the silicone oil surface of the rear roll of single - silicon release paper during material joining, the silicone oil surface can stick to the double - sided tape, but the adhesion between them is not high and they are easy to separate. When the single - silicon release paper is coated with an adhesive layer and enters the oven for drying, due to the increase in temperature, the glue and foam of the double - sided tape will become soft, and the bonding strength will decrease, resulting in a further decrease in the adhesion between the double - sided tape and the silicone oil surface of the rear roll of single - silicon release paper. When the joined part of the single - silicon release paper is under the traction force in the oven, the tape is likely to break, and it is necessary to stop the machine for maintenance, remove a large section of waste material in the oven and re - join the roll. Only after the fault is eliminated can production resume, resulting in material waste, reduced production efficiency, and increased production costs. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the above - mentioned prior art, and provides a self - adhesive non - stop unwind machine to solve the problem that the tape is likely to break easily after two rolls of single - silicon release paper are joined and enter the oven for drying.

[0005] The technical solution adopted by the present invention to solve its technical problems: A non-stop unwind machine for self-adhesive labels, comprising a double-station unwind device, a first material receiving device and a second material receiving device connected in sequence. The double-station unwind device is used to continuously output single-sided silicone release paper of two consecutive rolls. The first material receiving device is used to bond and connect the plain paper surface at the end of the previous roll of single-sided silicone release paper and the silicone oil surface at the beginning of the next roll of single-sided silicone release paper through a double-sided tape to form a material receiving point, and cut off the remaining material of the previous roll of single-sided silicone release paper. The second material receiving device includes a frame and a pressure roller and a bottom roller arranged up and down on the frame. A lifting mechanism is connected to the pressure roller. A composite tape roll is provided on the pressure roller. When the composite tape roll is unwound, it includes a plurality of single-sided tapes arranged continuously at intervals. A double-sided silicone release paper is lapped on the silicone oil surfaces of two adjacent single-sided tapes. When the composite tape roll is wound up, the adhesive surface of the single-sided tape faces outward. The second material receiving device is used to bond and fix the plain paper surface at the end of the previous roll of single-sided silicone release paper and the plain paper surface at the beginning of the next roll of single-sided silicone release paper through a single-sided tape.

[0006] For further improvement, the lifting mechanism is connected to a control system. The control system includes a detection sensor arranged in front of the pressure roller. The detection sensor is used to detect the material receiving point between two consecutive rolls of single-sided silicone release paper. When the material receiving point passes through the detection sensor, the control system can control the lifting mechanism to lift and lower the pressure roller, so that the pressure roller presses down and then lifts after rolling over the material receiving point.

[0007] For further improvement, the lifting mechanism includes a swing frame and a lifting cylinder. One end of the swing frame is rotatably connected to the frame, and the other end of the swing frame rotatably mounts the pressure roller. The two ends of the lifting cylinder are respectively hinged to the swing frame and the frame.

[0008] For further improvement, a clutch brake is provided on the pressure roller for rotational deceleration, stopping or maintaining a stopped state.

[0009] For further improvement, the pressure roller is connected to a gear transmission mechanism, and the gear transmission mechanism is connected to a servo motor.

[0010] For further improvement, a one-way rotation mechanism is provided between the pressure roller and the gear transmission mechanism.

[0011] For further improvement, the one-way rotation mechanism is a one-way bearing.

[0012] The beneficial effects of the present invention are as follows: The present invention is provided with a second material receiving device, which includes a bottom roller, a liftable pressure roller, and a composite tape roll. Compared with the prior art, when the material receiving points of two rolls of single-sided silicone release paper after the first material receiving by the double-sided tape pass between the bottom roller and the pressure roller, the pressure roller drives the composite tape roll to press down and lift after rolling over the material receiving point. During this process, the plain paper surface at the end of the front roll of single-sided silicone release paper is adhesively fixed to the plain paper surface at the beginning of the rear roll of single-sided silicone release paper through a single-sided tape. The double-sided silicone release paper can improve the fault tolerance rate of this process, reduce the positioning accuracy requirements of the pressure roller, avoid the adhesive surface of other single-sided tapes on the circumferential surface of the composite tape roll from adhering to the material receiving point in advance and causing damage, and ensure that each single-sided tape can be smoothly peeled off and attached to the material receiving point. The second material receiving device further improves the firmness of the connection between the two rolls of single-sided silicone release paper through secondary material receiving, ensuring that when the single-sided silicone release paper enters the oven for drying after coating, the material receiving part is not easily broken under the traction force in the oven, realizing continuous production without stopping, improving production efficiency, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the unwinder;

[0014] Figure 2 is a schematic diagram of the working principle of the first material receiving device;

[0015] Figure 3 is a schematic diagram of the structure when the composite tape roll is unwound;

[0016] Figure 4 is a schematic diagram of the working principle of the second material receiving device;

[0017] Figure 5 is a process flow chart of the self-adhesive;

[0018] Figure 6 is a schematic top view structure of the second material receiving device;

[0019] Description of the reference numerals: 1, frame; 2, pressure roller; 3, bottom roller; 4, swing frame; 5, lifting cylinder; 6, gear transmission mechanism; 7, servo motor; 8, one-way bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

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

[0021] As shown in the Figure 1 accompanying drawings, in this embodiment, a self-adhesive non-stop unwinder includes a double-station unwinding device, a first material receiving device, and a second material receiving device connected in sequence. The double-station unwinding device is used for continuously outputting two rolls of single-sided silicone release paper, front and rear. As shown in the Figure 2As shown, the first material receiving device is used to bond and connect the plain paper surface at the end of the previous roll of single-sided silicone release paper and the silicone oil surface at the beginning of the next roll of single-sided silicone release paper through a double-sided tape to form a material receiving point, and cut off the surplus material of the previous roll of single-sided silicone release paper. The second material receiving device includes a frame 1, a pressure roller 2 and a bottom roller 3 arranged up and down on the frame 1. The pressure roller 2 and the bottom roller 3 can rotate. A lifting mechanism is connected to the pressure roller 2, and the lifting mechanism is used to drive the pressure roller 2 to move up and down above the bottom roller 3. A composite tape roll is fixedly provided on the pressure roller 2. As attached Figure 3 As shown, when the composite tape roll is unrolled, it includes multiple single-sided tapes arranged continuously and at intervals. The interval between adjacent single-sided tapes is determined according to actual needs, and the recommended range is 1-30 mm; a double-sided silicone release paper is overlapped on the silicone oil surfaces of adjacent single-sided tapes. The double-sided silicone release paper is a paper with silicone oil surfaces / releases surfaces on both sides. When the composite tape roll is rolled up, the adhesive surface of the single-sided tape faces outward and has a certain adhesion to the double-sided silicone release paper, so that it can be wound into a composite tape roll with the single-sided tape and the double-sided silicone release paper one by one on the paper tube / pressure roller 2. As attached Figure 4 As shown, the second material receiving device is used to bond and fix the plain paper surface at the end of the previous roll of single-sided silicone release paper and the plain paper surface at the beginning of the next roll of single-sided silicone release paper through a single-sided tape. Dozens of single-sided tapes can be wound on the composite tape roll, which is sufficient to meet the requirements of one-day self-adhesive production.

[0022] Working principle: The structural principles of the double-station unwinding device and the first material receiving device are well-known technologies in the art (for details, refer to the double-station non-stop unwinding and rewinding machine with the publication number CN216945487U, etc., and some are cited). The double-station unwinding device has a double-station unwinding mechanism for unwinding. When a large-diameter coil needs to be loaded, the operator loads the large-diameter coil on the left double-station unwinding mechanism, and drives the rocker arm to swing downward through the motor rotating shaft, so that the coil roller on the rocker arm presses the new and old coils. The adhesive (i.e., double-sided tape) on the new coil contacts and adheres to the old coil. Then, the first material receiving device drives the cutting assembly to swing through the cylinder to cut the old coil. Then, the turntable rotates counterclockwise under the action of the motor to complete the loading, primary material receiving, and cutting operations.

[0023] When the feeding point of two rolls of single-sided silicon release paper after one-time feeding through double-sided tape is pulled between the bottom roller 3 and the pressure roller 2, the lifting mechanism drives the pressure roller 2 to drive the composite tape roll to press down, lift it up within a certain time after rolling over the feeding point. During this process, the plain paper surface at the end of the front roll of single-sided silicon release paper is adhesively fixed to the plain paper surface at the head of the rear roll of single-sided silicon release paper through single-sided tape. The double-sided silicon release paper has the functions of isolation, guidance, and reducing peeling resistance, which can improve the error tolerance rate of this process and reduce the requirement for the circumferential positioning accuracy of the pressure roller 2. For example, when the pressure roller 2 presses down, if the double-sided silicon release paper comes into contact with the single-sided silicon release paper one step earlier, it can prevent the adhesive surface of other single-sided tapes on the circumferential surface of the composite tape roll from adhering to the feeding point in advance and causing damage. Under the action of friction, the double-sided silicon release paper can drive the composite tape roll to rotate and bring down the single-sided tape, guiding the following single-sided tape to the feeding point, ensuring that the single-sided tapes can be smoothly peeled off and attached to the feeding point one by one. The double-sided silicon release paper is a consumable material, and it will automatically fall to the ground or be collected by other winding devices after use, avoiding affecting the feeding. The second feeding device can further improve the firmness of the connection between the two rolls of single-sided silicon release paper through secondary feeding, ensuring that when the single-sided silicon release paper with glue enters the oven for drying, the feeding point is not prone to tape breakage under the action of traction force in the oven, realizing continuous production without stopping, improving production efficiency, and reducing production costs.

[0024] As shown in the Figure 5 appendix, the uses of this unwinder will be described below in combination with the self-adhesive process. This process includes the following technological steps:

[0025] Step 1: Loading. The double-station unwinding device sequentially unwinds at least two rolls of single-sided silicon release paper for subsequent gluing.

[0026] Step 2: First-time feeding. When the front roll of single-sided silicon release paper is about to run out, the double-station unwinding device rotates for a roll change operation. The first feeding device adhesively connects and strings together the plain paper surface at the end of the front roll of single-sided silicon release paper and the silicone oil surface at the head of the rear roll of single-sided silicon release paper through double-sided tape, and cuts off the remaining material of the front roll of single-sided silicon release paper.

[0027] Step 2: Second-time feeding. After the roll change, the second feeding device adhesively fixes the plain paper surface at the end of the front roll of single-sided silicon release paper to the plain paper surface at the head of the rear roll of single-sided silicon release paper through single-sided tape.

[0028] Step 3: Gluing. The gluing device coats a glue layer on the silicone oil surface of the single-sided silicon release paper.

[0029] Step 4: Drying. The single-sided silicon release paper with the glue layer is sent into the oven for drying treatment.

[0030] Step 5: Laminating. The laminating machine covers the fabric paper on the glue layer of the dried single-sided silicon release paper to form self-adhesive.

[0031] Step Six: Material collection. Use a material collection device to wind the finished self-adhesive products. Before winding, a die-cutting device, a water return device, etc. can also be added. The die-cutting device can die-cut the fabric paper, cut out the required shape, and peel off the excess fabric around it. The water return device uses a water wheel to moisten and replenish water to the self-adhesive to avoid wrinkles caused by paper drying.

[0032] In fact, single-sided silicon-coated fabric paper is also selected for the fabric paper. Therefore, this unwinder can also be used for non-stop feeding, improving the reliability of feeding and avoiding the phenomenon of belt breakage due to traction.

[0033] The lifting mechanism is connected to a control system. The control system includes a detection sensor arranged in front of the pressure roller 2. The detection sensor is used to detect the feeding point between two consecutive rolls of single-sided silicon release paper. When the feeding point passes through the detection sensor, the detection sensor feeds back the signal that the feeding point has passed to the control unit (single-chip microcomputer or PLC controller) of the control system. The control unit can delay the control of the lifting mechanism to make the pressure roller 2 lift and lower, so that the pressure roller 2 can just roll over the feeding point and then lift, ensuring the stable pasting length of the single-sided adhesive tape with the two rolls of single-sided silicon release paper. After combining with the technology of the detection sensor, the automatic control of the lifting mechanism can be realized, improving the accuracy and stability of the second feeding device.

[0034] The lifting mechanism includes a swing frame 4 and a lifting cylinder 5. One end of the swing frame 4 is rotatably connected to the frame 1, and the other end of the swing frame 4 rotatably mounts the pressure roller 2. Both ends of the lifting cylinder 5 are hinged to the swing frame 4 and the frame 1 respectively. The lifting cylinder 5 is controlled to expand and contract by a cylinder control valve. The cylinder control valve is connected to the air source and the lifting mechanism, and the cylinder control valve is electrically connected to the control unit of the control system. When the control unit receives a signal, the control unit controls the lifting cylinder 5 to extend through the cylinder control valve, driving the swing frame 4 to rotate and drive the pressure roller 2 to press down on the bottom roller 3. The pressure roller 2 rolls to make the single-sided adhesive tape adhere to the feeding point for secondary feeding. After calculating the time and finishing pasting, the control unit controls the lifting cylinder 5 to shorten through the cylinder control valve, driving the swing frame 4 to rotate and drive the pressure roller 2 to lift. Due to the isolation of the double-sided silicon release paper and the reserved interval between adjacent single-sided adhesive tapes, it can be ensured that the next single-sided adhesive tape will not be pasted.

[0035] A clutch brake for rotational deceleration, stopping, or maintaining a stopped state is provided on the pressure roller 2. The clutch brake can quickly apply the brake to stop the pressure roller 2 when the pressure roller 2 is lifted, ensuring the accurate circumferential position of the next single-sided adhesive tape and guaranteeing the completion of the next secondary feeding. After the clutch brake is released, the circumferential position of the next single-sided adhesive tape can also be adjusted by manually rotating the pressure roller 2 to ensure no mistakes.

[0036] Another embodiment is that the pressure roller 2 is connected to a gear transmission mechanism 6, and the gear transmission mechanism 6 is connected to a servo motor 7. The servo motor 7 generally has a built-in braking function. After the pressure roller 2 moves downward, the servo motor 7 can drive the pressure roller 2 to rotate actively, and cooperate with the conveying speed of the paper tape, so that the single-sided tape can be more smoothly attached to the receiving point, and it is not easy to cause the failure of secondary material receiving due to slipping or other situations. After the pressure roller 2 moves downward, the servo motor 7 can be immediately braked, and then the servo motor 7 automatically rotates to adjust the pressure roller 2 to move the next single-sided tape to the optimal position. Further optimized setting, a one-way rotation mechanism is provided between the pressure roller 2 and the gear transmission mechanism 6, which can ensure that the pressure roller 2 can only rotate in one direction (clockwise) for adjustment. At this time, the servo motor 7 can not be selected to work when the pressure roller 2 rotates. The one-way rotation mechanism is a one-way bearing 8. The one-way bearing 8 can ensure that the pressure roller 2 will not reverse due to the weight and shaking of the tape roll, causing the next single-sided tape to rotate counterclockwise, and the one-way bearing 8 can increase a certain damping force, so that after the pressure roller lifts the composite tape roll, it will only rotate clockwise for a small distance and then stop.

[0037] Although the present invention has been illustrated and described by reference to the preferred embodiments, those skilled in the art should understand that various changes in form and details may be made within the scope of the claims.

Claims

1. An adhesive label non-stop unwinding machine, comprising a double-station unwinding device, a first material receiving device, and a second material receiving device that are connected in sequence. The double-station unwinding device is used to continuously output single-sided silicone release paper of two consecutive rolls. The first material receiving device is used to bond and connect the plain paper surface at the end of the previous roll of single-sided silicone release paper and the silicone oil surface at the beginning of the next roll of single-sided silicone release paper through a double-sided tape to form a material receiving point, and cut off the surplus material of the previous roll of single-sided silicone release paper. It is characterized in that: The second material receiving device includes a frame (1), a pressure roller (2) and a bottom roller (3) arranged up and down on the frame (1). A lifting mechanism is connected to the pressure roller (2). A composite tape roll is provided on the pressure roller (2). When the composite tape roll is unfolded, it includes multiple continuous and spaced single-sided tapes. A double-sided silicone release paper is overlapped on the silicone oil surfaces of two adjacent single-sided tapes. When the composite tape roll is wound up, the adhesive surface of the single-sided tape faces outward. The second material receiving device is used to bond and fix the plain paper surface at the end of the previous roll of single-sided silicone release paper and the plain paper surface at the beginning of the next roll of single-sided silicone release paper through a single-sided tape.

2. The adhesive label non-stop unwinding machine according to claim 1, It is characterized in that: The lifting mechanism is connected to a control system. The control system includes a detection sensor arranged in front of the pressure roller (2). The detection sensor is used to detect the material receiving point between two consecutive rolls of single-sided silicone release paper. When the material receiving point passes through the detection sensor, the control system can control the lifting mechanism to lift and lower the pressure roller (2), so that the pressure roller (2) presses down and then lifts after rolling over the material receiving point.

3. The adhesive label non-stop unwinding machine according to claim 1, It is characterized in that: The lifting mechanism includes a swing frame (4) and a lifting cylinder (5). One end of the swing frame (4) is rotatably connected to the frame (1), and the other end of the swing frame (4) rotatably mounts the pressure roller (2). Both ends of the lifting cylinder (5) are hinged to the swing frame (4) and the frame (1) respectively.

4. The adhesive label non-stop unwinding machine according to claim 1, It is characterized in that: A clutch brake is provided on the pressure roller (2) for rotational deceleration, stopping or maintaining a stopped state.

5. The adhesive label non-stop unwinding machine according to claim 1, It is characterized in that: The pressure roller (2) is connected to a gear transmission mechanism (6), and the gear transmission mechanism (6) is connected to a servo motor (7).

6. The adhesive label non-stop unwinding machine according to claim 5, It is characterized in that: A one-way rotation mechanism is provided between the pressure roller (2) and the gear transmission mechanism (6).

7. The adhesive label non-stop unwinding machine according to claim 6, It is characterized in that: The one-way rotation mechanism is a one-way bearing (8).

Images