Automatic cutting film roll splicing equipment capable of changing rolls without shutdown
By designing a rotating material rack and a film roll guiding structure, combined with vacuum adsorption and adhesive bonding technologies, the problems of flatness and precision during film roll changing were solved, enabling automatic roll changing without stopping the machine and improving production efficiency.
Patent Information
- Application Number
- CN202511546808.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-01-23
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing technologies suffer from problems such as membrane roll wrinkles, uneven splicing, end misalignment, and low production efficiency during membrane roll changing, making it impossible to achieve automatic roll changing without stopping the machine.
The system employs a rotating material rack, a material changing and splicing device, and a retractable membrane roll conveying device. It achieves precise cutting and bonding of the membrane roll through a vacuum adsorption box, a membrane roll cutter, and a glue brush head. The membrane roll guiding structure ensures the flatness and accuracy of the membrane roll and avoids changes in the membrane structure during transmission.
This achieves surface flatness and end precision after film roll splicing, ensuring that the film layer structure remains unchanged during roll changing without stopping the machine, thus improving production efficiency.
Smart Images
Figure CN121376702A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of non-stop film roll changing and splicing, specifically relating to an automatic film roll cutting and splicing device for non-stop film roll changing. Background Technology
[0002] Protective films can be categorized by their application into digital product protective films, automotive protective films, household protective films, food preservation protective films, etc. With the widespread use of mobile phones and other digital products in China, protective films have gradually become a general term for screen protectors. Protective films consist of a base film layer, a functional film layer, and an adhesive film layer. During the production process, the film rolls of each film layer need to be continuously transported and pressed. The film rolls on the take-up roller are continuously transported to the traction device. When the film rolls on the take-up roller are exhausted, a new take-up roller (with film rolls wound on it) needs to be replaced. The old film rolls and the new film rolls are fixed together by adhesive bonding before normal transport.
[0003] Currently, during production, the entire roll-changing process is manually monitored, with the traction end of the new film roll being manually bonded to the film roll in transit. This requires machine downtime to accommodate manual roll changing, which cannot guarantee production efficiency. Existing automated splicing equipment achieves non-stop automatic film roll splicing. This equipment typically uses clamping devices to hold the new take-up roller on the leading edge of the old take-up roller. The new take-up roller has an adhesive layer on its film roll. After the new film roll and the film roll in transit are pressed together by pressing rollers, the film roll in transit is separated from the old film roll by a film roll cutter. However, this equipment has the following technical drawbacks in actual operation: 1. During the transport of the membrane roll, a new membrane roll containing an adhesive layer passes through it, and the two are pressed and spliced together by a pressure roller. Then, the old membrane roll is cut and separated from the membrane roll in the transport. During the pressing process, the membrane roll is very prone to wrinkles, and the surface of the spliced membrane roll is uneven, which in turn affects the quality of the finished protective film in the later processing.
[0004] 2. When splicing new membrane rolls with membrane rolls in transit, end misalignment is very likely to occur, making it impossible to accurately guarantee the splicing accuracy between the new membrane rolls and the membrane rolls in transit. 3. During cutting and splicing, the film roll in transit is subjected to the cutting force at the end and the pressure of the pressure roller. The film roll in transit will also be subjected to a certain tension at the end, which changes the internal structure of the film layer. Therefore, when changing rolls for splicing, the film roll in transit still needs to be stopped for a certain period of time, which will affect production efficiency. Summary of the Invention
[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an automatic film roll cutting and splicing device that allows for non-stop roll changing, ensuring the surface flatness and end splicing accuracy of the spliced film rolls, and truly achieving non-stop roll changing and splicing without changing the internal structure of the film layer.
[0006] The objective of this invention is achieved through the following technical solution: an automatic film roll cutting and splicing device that allows for non-stop roll changing, comprising a rotating material rack, a material changing and splicing device, and a retractable film roll conveying device; the rotating material rack has a conveying station, a waiting station located at the upper edge of the conveying station, and a feeding station located at the lower edge of the conveying station. The material changing and splicing device includes a film roll guide structure set next to the workstation and rotating with the rotating material rack, and an adsorption cutting structure set between the film roll guide structure and the retractable film roll conveying device. The adsorption cutting structure includes a vacuum adsorption box, a film roll cutter set near the vacuum adsorption box, and a glue brush head set on the vacuum adsorption box. The film rolls on the rotating rack at the transfer station are transported to the retractable film roll transfer device via the corresponding film roll guide structure. When the film roll at the transfer station needs to be replaced, the film roll guide structure at the transfer station guides the film roll to the end face of the vacuum adsorption box. At this time, the film roll cutter cuts the film roll at the transfer station. The end of the film roll at the transfer station is vacuum adsorbed and fixed to the lower side of the end face of the vacuum adsorption box. The film roll guide structure at the transfer station resets, and the glue brush applies an adhesive layer to the end face of the film roll. The film roll guide structure at the waiting station guides the corresponding film roll to the end face of the vacuum adsorption box. The end of the film roll at the waiting station is vacuum adsorbed and fixed to the upper side of the end face of the vacuum adsorption box. The film roll guide structure at the waiting station presses the end of the film roll at the waiting station onto the end of the film roll at the transfer station. Under the pressing action of the film roll guide structure, the two film rolls are spliced together. At this time, the film roll guide structure at the waiting station resets and rotates together with the rotating rack at the waiting station to the transfer station.
[0007] A further improvement of the present invention is that the film roll guiding structure includes a connecting frame arranged near the work station and two opening and closing plates hinged on the connecting frame and arranged facing each other. The two opening and closing plates are opened and closed by a connecting rod two-drive group, and the facing ends of the opening and closing plates have rollers. When the two rollers open under the action of the second drive group of the connecting rod, the two rollers are in contact with the end face of the vacuum adsorption box; when the two rollers close under the action of the second drive group of the connecting rod, the two rollers are in contact with each other and move away from the vacuum adsorption box.
[0008] A further improvement of the present invention is that: the second linkage drive group includes two three-position connectors hinged to the connecting frame. The first end of the three-position connector is movably hinged to the connecting frame. The second end of the three-position connector is movably hinged to the end of the opening and closing plate away from the roller body via a first linkage. The third end of the three-position connector is movably hinged to a second linkage. An electric push rod is connected to the connecting frame near the second linkage. A movable member is movably hinged to the connecting frame near the driving end of the electric push rod. The middle part of the movable member is movably hinged to the connecting frame. One end of the movable member is movably hinged to the end of a second linkage. The other end of the movable member is movably hinged to the end of another second linkage. The driving end of the electric push rod is movably hinged to one end of the movable member. When the electric push rod is raised, the two connecting rods move, thereby driving the two opening and closing plates to open, causing the rollers on the two opening and closing plates to move towards the vacuum adsorption box; when the electric push rod is retracted, the two connecting rods move, thereby driving the two opening and closing plates to close, causing the rollers on the two opening and closing plates to move away from the vacuum adsorption box.
[0009] A further improvement of the present invention is that: the end of the opening and closing plate located on the upper side of the film roll guide structure away from the roller body has a steering roller, and the film roll on the transfer station passes through the steering roller and the roller body on the station in sequence to the retractable transfer device for transfer; the film roll on the waiting station passes through the steering roller and the roller body on the station and is wound and fixed on the roller body on the lower side.
[0010] A further improvement of the present invention is that the roller body and the corresponding opening and closing plate are connected by a buffer connection group. When the roller body is driven by the second drive group of the connecting rod to contact the end face of the vacuum adsorption box, the roller body slides on the end face of the vacuum adsorption box under the buffering effect of the buffer connection group.
[0011] A further improvement of the present invention is that: the buffer connection group includes fixed seats disposed on both sides of the opening and closing plate and sliding columns disposed on the fixed seats, the roller body is placed between the two fixed seats, the end of the roller body has a sliding sleeve sleeved on the sliding column, a plurality of buffer springs are provided between the sliding sleeve and the fixed seats, the extension direction of the buffer springs is consistent with the buffer movement direction of the roller body, and a rotating roller sleeve is sleeved on the roller body.
[0012] A further improvement of the present invention is that: the end face of the vacuum adsorption box has multiple air holes, the end face of the vacuum adsorption box is divided into an upper adsorption zone and a lower adsorption zone, the vacuum adsorption box has an upper vacuum pump communicating with the upper adsorption zone, and the vacuum adsorption box has a lower vacuum pump communicating with the lower adsorption zone.
[0013] A further improvement of the present invention is that the membrane roll cutter and the glue brush head are both located on one side of the end face of the vacuum adsorption box, and reciprocate along the radial and axial directions of the end face of the vacuum adsorption box.
[0014] A further improvement of the present invention is that the retractable transmission device consists of multiple transmission rollers arranged alternately in front and behind, and the multiple transmission rollers on one side reciprocate toward the multiple transmission rollers on the other side.
[0015] A further improvement of the present invention is that a weight sensor is provided at the position of the film roll on the rotating material rack.
[0016] Compared with the prior art, the present invention has the following advantages: 1. In this invention, the material changing and splicing device is set between the rotating material rack and the retractable film roll conveying device. During the film roll changing and splicing, the film roll on the conveying station is cut by the film roll cutter and then adsorbed into the lower adsorption area by the vacuum adsorption box under the guidance of the film roll guiding structure. The end face is then coated with glue by the glue brush head. The film roll on the waiting station is adsorbed into the upper adsorption area by the vacuum adsorption box under the guidance of the corresponding film roll guiding structure and is bonded to the end face of the film roll in the conveying station. The two film rolls are spliced and bonded by the rotation of the rollers after the opening in the film roll guiding structure. In this application, the film roll is spread out and approaches the vacuum adsorption box smoothly after the opening of the two rollers on the corresponding film roll guiding structure and finally bonded to the vacuum adsorption box, ensuring the flatness of the two film rolls during the splicing process. 2. In this invention, the film roll is positioned on the roller body of the corresponding film roll guide structure. The positional accuracy of the film roll on the roller body can be controlled in advance. Under the opening and closing of the film roll guide structure and the adsorption force of the vacuum adsorption box, the accuracy deviation of the two film rolls at the end face of the vacuum adsorption box is controlled, thereby ensuring the end splicing accuracy. 3. During transmission, the retractable film roll transmission device reciprocates from multiple transmission rollers on one side to multiple transmission rollers on the other side. This avoids affecting the internal structure of the film layer due to the vacuum adsorption and cutting force of the material changing and splicing device during normal transmission. While ensuring that the internal structure of the film layer is not changed, roll changing and splicing can be truly achieved without stopping the machine. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of an automatic film roll cutting and splicing device that allows for non-stop roll changing according to the present invention.
[0018] Figures 2 to 7 This is a schematic diagram illustrating the steps of an automatic film roll cutting and splicing device that allows for non-stop roll changing in this invention.
[0019] Figure 8 This is a schematic diagram of the linkage drive assembly in this invention.
[0020] Figure 9 This is a schematic diagram of the vacuum adsorption box in this invention.
[0021] Figure 10 This is a schematic diagram of the buffer connection group in this invention.
[0022] Numbering on the map: 1-Rotating material rack, 2-Material changing and splicing device, 3-Retractable film roll conveying device, 4-Transfer station, 5-Waiting station, 6-Feeding station, 7-Film roll; 21-Membrane roll guiding structure; 22-Adsorption and cutting structure; 221-Vacuum adsorption box; 222-Membrane roll cutter; 223-Glue brush head; 224-Air hole; 225-Upper adsorption area; 226-Lower adsorption area; 211-Connecting frame; 212-Opening and closing plate; 213-Roller body; 214-Connecting rod two drive group; 215-Steering roller; 216-Buffer connecting group; 2141-Three-position connector; 2142-Connecting rod two; 2143-Electric push rod; 2144-Moving part; 2145-Connecting rod one; 2161-Fixed base; 2162-Sliding column; 2163-Sliding sleeve; 2164-Buffer spring; 2165-Rotating roller sleeve; 31-Transfer roller. Detailed Implementation
[0023] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.
[0024] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship, such as those based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the structure or unit referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.
[0025] In this invention, unless otherwise explicitly specified and limited, terms such as “connection,” “provided with,” and “have” should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can be described as a mechanical connection, a direct connection, or a connection through an intermediate medium. Those skilled in the art can understand the basic meaning of the above terms in this invention according to the specific circumstances.
[0026] An automatic film roll cutting and splicing device that allows for non-stop roll changing, referring to... Figure 1 It includes a rotating material rack 1, a material changing and splicing device 2, and a retractable film roll conveying device 3; the rotating material rack 1 has a conveying station 4, a waiting station 5 located at the upper edge of the conveying station 4, and a feeding station 6 located at the lower edge of the conveying station 4. The material changing and splicing device 2 includes a film roll guide structure 21 that is set next to the workstation and rotates with the rotating material rack 1, and an adsorption cutting structure 22 that is set between the film roll guide structure 21 and the retractable film roll conveying device 3. The adsorption cutting structure 22 includes a vacuum adsorption box 221, a film roll cutter 222 that is set close to the vacuum adsorption box 221, and a glue brush head 223 that is set on the vacuum adsorption box 221. The film roll 7 on the rotating material rack 1 at the transfer station 4 is transferred to the retractable film roll transfer device 3 via the corresponding film roll guide structure 21. When the film roll 7 on the transfer station 4 needs to be replaced, the film roll guide structure 21 on the transfer station 4 guides the film roll 7 to the end face of the vacuum adsorption box 221. At this time, the film roll cutter 222 cuts the film roll 7 on the transfer station 4. The end of the film roll 7 on the transfer station 4 is fixed by vacuum adsorption to the lower side of the end face of the vacuum adsorption box 221. The film roll guide structure 21 on the transfer station 4 is reset, and the glue brush head 223 applies a glue layer to the end face of the film roll 7 and places it on the end face of the vacuum adsorption box 221. The membrane roll guide structure 21 on the waiting station 5 guides the corresponding membrane roll 7 to the end face of the vacuum adsorption box 221. The end of the membrane roll 7 on the waiting station 5 is fixed to the upper side of the end face of the vacuum adsorption box 221 by vacuum adsorption. The membrane roll guide structure 21 on the waiting station 5 presses the end of the membrane roll 7 on the station onto the end of the membrane roll 7 on the transfer station 4. Under the pressing action of the membrane roll guide structure 21, the two membrane rolls 7 are spliced together. At this time, the membrane roll guide structure 21 on the waiting station 5 is reset and rotates together with the rotating material rack 1 on the waiting station 5 to the transfer station 4.
[0027] The specific structure of the film roll guide structure 21 is as follows: The film roll guide structure 21 includes a connecting frame 211 set near the work station and two opening and closing plates 212 hinged on the connecting frame 211 and facing each other. The two opening and closing plates 212 are opened and closed by a connecting rod drive group 214. The facing ends of the opening and closing plates 212 have rollers 213. When the two rollers 213 are opened by the second drive group 214 of the connecting rod, the two rollers 213 are in contact with the end face of the vacuum adsorption box 221; when the two rollers 213 are closed by the second drive group 214 of the connecting rod, the two rollers 213 are in contact with each other and move away from the vacuum adsorption box 221.
[0028] In this invention, the material changing and splicing device 2 is set between the rotating material rack 1 and the retractable film roll conveying device 3. During the film roll splicing, the film roll 7 on the conveying station 4 is cut by the film roll cutter 222 and then adsorbed into the lower adsorption area 226 by the vacuum adsorption box 221 under the guidance of the film roll guide structure 21. The end face is then coated with glue by the glue brush head 223. The film roll 7 on the waiting station 5 is adsorbed into the upper adsorption area 225 by the vacuum adsorption box 221 under the guidance of the corresponding film roll guide structure 21, and is attached to the end face of the film roll 7 in the conveying process. The two film rolls 213 are spliced and attached by the rotation of the roller 213 after opening in the film roll guide structure 21. In this application, the film roll 7 is spread out and close to the vacuum adsorption box 221 after the opening of the two rollers 213 on the corresponding film roll guide structure 21, and finally attached to the vacuum adsorption box 221, ensuring the flatness of the two film rolls 7 during the splicing process.
[0029] In this invention, the film roll 7 is positioned on the roller 213 corresponding to the film roll guide structure 21. The positional accuracy of the film roll 7 on the roller 213 can be controlled in advance. Under the opening and closing of the film roll guide structure 21 and the adsorption force of the vacuum adsorption box 221, the accuracy deviation of the end face position of the two film rolls 7 in the vacuum adsorption box 221 can be controlled, thereby ensuring the end splicing accuracy.
[0030] Based on this embodiment, refer to Figure 8 The second linkage drive assembly 214 includes two three-position connectors 2141 hinged to the connecting frame 211. The first end of the three-position connector 2141 is movably hinged to the connecting frame 211. The second end of the three-position connector 2141 is movably hinged to the end of the opening and closing plate 212 away from the roller body 213 via a first linkage 2145. The third end of the three-position connector 2141 is movably hinged to a second linkage 2142. An electric push rod 2143 is connected to the connecting frame 211 near the second linkage 2142. A movable member 2144 is movably hinged to the connecting frame 211 near the driving end of the electric push rod 2143. The middle part of the movable member 2144 is movably hinged to the connecting frame 211. One end of the movable member 2144 is movably hinged to the end of a second linkage 2142. The other end of the movable member 2144 is movably hinged to the end of another second linkage 2142. The driving end of the electric push rod 2143 is movably hinged to one end of the movable member 2144. When the electric push rod 2143 is raised, the two connecting rods 2142 move, thereby driving the two opening and closing plates 212 to open, causing the rollers 213 on the two opening and closing plates 212 to move towards the vacuum adsorption box 221; when the electric push rod 2143 is retracted, the two connecting rods 2142 move, thereby driving the two opening and closing plates 212 to close, causing the rollers 213 on the two opening and closing plates 212 to move away from the vacuum adsorption box 221.
[0031] In this application, the membrane roll guide structure 21 in the closed state during the transmission process plays the role of supporting the transmission of the membrane roll, while the membrane roll guide structure 21 gradually opens during the roll changing and splicing process, stretching and opening the two membrane rolls 7 so that they are flatly attached to the end face of the vacuum adsorption box 221.
[0032] Based on this embodiment, the opening and closing plate 212 on the upper side of the film roll guide structure 21 has a steering roller 215 at the end away from the roller body 213. The film roll 7 on the transfer station 4 passes through the steering roller 215 and the roller body 213 on the station in sequence to the retractable transfer device 3 for transfer. The film roll 7 on the waiting station 5 passes through the steering roller 215 and the roller body 213 on the station and is wound and fixed on the roller body 213 on the lower side.
[0033] The function of the steering roller 215 on the opening and closing plate 212 is to provide steering support for the film roll 7, ensure the smooth transition of the film roll 7, and avoid wear on the film roll 7.
[0034] Based on this embodiment, the roller 213 and the corresponding opening and closing plate 212 are connected by a buffer connection group 216. When the roller 213 is driven by the connecting rod second drive group 214 to contact the end face of the vacuum adsorption box 221, the roller 213 slides on the end face of the vacuum adsorption box 221 under the buffering effect of the buffer connection group 216.
[0035] In this application, the two opening and closing plates 212 of the film roll guide structure 21 are opened, guiding the film roll 7 on the roller body 213 to move towards the end face of the vacuum adsorption box 221. When the end faces of the two film rolls 7 adsorbed on the vacuum adsorption box 221 are attached, the opening and closing plates 212 continue to open. At this time, the roller body 213 at the end of the opening and closing plate 212 is attached to the end face of the vacuum adsorption box 221 and slides along its end face, thereby pressing the end faces of the two film rolls 7 after adhesive bonding. The roller body 213 is set on the opening and closing plate 212 through the buffer connection group 216 to ensure that the roller body 213 contacts the end face of the vacuum adsorption box 221 and slides on its end face as the opening and closing plate 212 is continuously opened, thereby realizing the pressing of the adhesive position of the two film rolls 7.
[0036] Based on this embodiment, refer to Figure 10 The buffer connection group 216 includes fixed seats 2161 disposed on both sides of the opening and closing plate 212 and sliding columns 2162 disposed on the fixed seats 2161. The roller body 213 is placed between the two fixed seats 2161. The end of the roller body 213 has a sliding sleeve 2163 sleeved on the sliding column 2162. There are multiple buffer springs 2164 between the sliding sleeve 2163 and the fixed seats 2161. The extension direction of the buffer springs 2164 is consistent with the buffer movement direction of the roller body 213. A rotating roller sleeve 2165 is sleeved on the roller body 213.
[0037] Based on this embodiment, refer to Figure 9 The end face of the vacuum adsorption box 221 has multiple air holes 224. The end face of the vacuum adsorption box 221 is divided into an upper adsorption zone 225 and a lower adsorption zone 226. The vacuum adsorption box 221 has an upper vacuum pump that communicates with the upper adsorption zone 225 and a lower vacuum pump that communicates with the lower adsorption zone 226.
[0038] Based on this embodiment, the membrane roll cutter 222 and the glue brush head 223 are both located on one side of the end face of the vacuum adsorption box 221, and reciprocate along the radial and axial directions of the end face of the vacuum adsorption box 221. The membrane roll cutter 222 and the glue brush head 223 are both conventional structures for cutting and gluing in the art, and can move along the radial direction of the membrane roll 7 to complete the cutting and gluing of the membrane roll.
[0039] Based on this embodiment, the retractable transmission device 3 is composed of multiple transmission rollers 31 arranged alternately in front and behind, and the multiple transmission rollers 31 on one side move back and forth towards the multiple transmission rollers 31 on the other side.
[0040] In this application, during transmission, the retractable film roll transmission device 3 has multiple transmission rollers 31 positioned on one side moving back and forth towards multiple transmission rollers 31 positioned on the other side. This avoids the impact on the internal structure of the film layer caused by the vacuum adsorption of the material changing and splicing device and the cutting force during normal transmission. While ensuring that the internal structure of the film layer is not changed, roll changing and splicing can be truly achieved without stopping the machine.
[0041] Based on this embodiment, a weight sensor is provided at the position of the film roll 7 on the rotating material rack 1.
[0042] Reference Figures 1 to 7 The roll changing steps of the automatic film roll cutting and splicing equipment that allows for non-stop roll changing according to this application include: S1. Under normal transmission conditions, the film roll 7 on the transmission station 4 is transmitted to the position of the retractable film roll transmission device 3 via the roller 213 on the film roll guide structure 21. S2. The weight sensor on the transfer station 4 monitors the weight value. When the weight value reaches the predetermined value set by the system, the electric push rod 2143 of the film roll guide structure 21 on the transfer station 4 is lifted, causing the rollers 213 on the two opening and closing plates 212 to move towards the vacuum adsorption box 221. The lower vacuum pump of the lower adsorption area 226 is started, so that the film roll on the transfer station 4 is adhered and adsorbed to the end face of the lower adsorption area 226 of the vacuum adsorption box 221 under the guidance of the film roll guide structure 21. The film roll cutter 222 cuts the film roll 7 on the transfer station 4, and the glue brush head 223 applies a glue layer to the end of the cut film roll 7. The film roll guide structure 21 on the transfer station 4 is reset. S3. The electric push rod 2143 of the film roll guide structure 21 on the waiting station 5 is lifted, causing the rollers 213 on the two opening and closing plates 212 to move towards the vacuum adsorption box 221. The upper vacuum pump of the upper adsorption area 225 is started, so that the film roll 7 on the waiting station 5 is adhered to the end face of the upper adsorption area 225 of the vacuum adsorption box 221 under the guidance of the film roll guide structure 21. The ends of the two film rolls 7 overlap and adhere. The electric push rod 2143 of the film roll guide structure 21 on this station continues to lift. The roller 216 slides on the end face of the vacuum adsorption box 221 under the buffering effect of the buffer connection group 216, realizing the pressing of the connection between the ends of the two film rolls 7. When the two film rolls 7 are pressed and spliced, the transmission roller 31 on one side of the retractable film roll transmission device 3 moves to the transmission roller 31 on the other side to avoid the film roll 7 being stretched by vacuum adsorption and cutting force during the transmission process, thus preventing the internal structure of the film layer from being affected. S4. The electric push rod 2143 of the film roll guide structure 21 on the waiting station 5 retracts and resets, the upper vacuum pump and the lower vacuum pump are turned off, and the spliced film roll 7 is reset to the film roll guide structure 21 on the waiting station 5. At this time, the rotating material rack 1 rotates, so that the film roll 7 on the waiting station 5 and the film roll guide structure 21 rotate towards the direction of the transfer station 4. The retractable film roll transfer device 3 is reset, and the single non-stop film roll change is completed.
[0043] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. An automatic film roll cutting and splicing device that allows for non-stop roll changing, characterized in that: It includes a rotating material rack, a material changing and splicing device, and a retractable film roll conveying device; the rotating material rack has a conveying station, a waiting station located at the upper edge of the conveying station, and a feeding station located at the lower edge of the conveying station. The material changing and splicing device includes a film roll guide structure set on the side of the workstation and rotating with the rotating material rack, and an adsorption and cutting structure set between the film roll guide structure and the retractable film roll conveying device. The adsorption and cutting structure includes a vacuum adsorption box, a film roll cutter set near the vacuum adsorption box, and a glue brush head set on the vacuum adsorption box. The film rolls on the rotating rack at the transfer station are transported to the retractable film roll transfer device via the corresponding film roll guide structure. When the film roll at the transfer station needs to be replaced, the film roll guide structure at the transfer station guides the film roll to the end face of the vacuum adsorption box. At this time, the film roll cutter cuts the film roll at the transfer station, and the end of the film roll at the transfer station is vacuum adsorbed and fixed to the lower side of the end face of the vacuum adsorption box. The film roll guide structure at the transfer station resets, and the glue brush applies an adhesive layer to the end face of the film roll. The film roll guide structure at the waiting station guides the corresponding film roll to the end face of the vacuum adsorption box. The end of the film roll at the waiting station is vacuum adsorbed and fixed to the upper side of the end face of the vacuum adsorption box. The film roll guide structure at the waiting station presses the end of the film roll at the waiting station onto the end of the film roll at the transfer station, and the two film rolls are spliced under the pressing action of the film roll guide structure. At this time, the film roll guide structure at the waiting station resets and rotates together with the rotating rack at the waiting station to the transfer station.
2. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 1, characterized in that: The film roll guiding structure includes a connecting frame located near the work station and two opening and closing plates hinged on the connecting frame and facing each other. The two opening and closing plates are opened and closed by a connecting rod two-drive group, and the facing ends of the opening and closing plates have rollers. When the two rollers open under the action of the second drive group of the connecting rod, the two rollers are in contact with the end face of the vacuum adsorption box; when the two rollers close under the action of the second drive group of the connecting rod, the two rollers are in contact with each other and move away from the vacuum adsorption box.
3. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 2, characterized in that: The second linkage drive assembly includes two three-position connectors hinged to the connecting frame. The first end of the three-position connector is movably hinged to the connecting frame, and the second end of the three-position connector is movably hinged to the end of the opening and closing plate away from the roller body via a first linkage. The third end of the three-position connector is movably hinged to a second linkage. An electric push rod is connected to the connecting frame near the second linkage. A movable member is movably hinged to the connecting frame near the driving end of the electric push rod. The middle of the movable member is movably hinged to the connecting frame. One end of the movable member is movably hinged to the end of a second linkage, and the other end of the movable member is movably hinged to the end of another second linkage. The driving end of the electric push rod is movably hinged to one end of the movable member. When the electric push rod is raised, the two connecting rods move, thereby driving the two opening and closing plates to open, causing the rollers on the two opening and closing plates to move towards the vacuum adsorption box; when the electric push rod is retracted, the two connecting rods move, thereby driving the two opening and closing plates to close, causing the rollers on the two opening and closing plates to move away from the vacuum adsorption box.
4. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 3, characterized in that: The film roll guide structure has a steering roller at the end of the opening and closing plate located on the upper side, away from the roller body. The film roll on the transfer station passes through the steering roller and the roller body on the station in sequence to the retractable transfer device for transfer. The film roll on the waiting station passes through the steering roller and the roller body on the station and is wound and fixed on the roller body located on the lower side.
5. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 3, characterized in that: The roller body and the corresponding opening and closing plate are connected by a buffer connection group. When the roller body is driven by the second drive group of the connecting rod to contact the end face of the vacuum adsorption box, the roller body slides on the end face of the vacuum adsorption box under the buffering effect of the buffer connection group.
6. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 5, characterized in that: The buffer connection assembly includes fixed seats on both sides of the opening and closing plate and sliding columns on the fixed seats. The roller is placed between the two fixed seats. The end of the roller has a sliding sleeve sleeved on the sliding column. There are multiple buffer springs between the sliding sleeve and the fixed seats. The extension direction of the buffer springs is consistent with the buffer movement direction of the roller. A rotating roller sleeve is sleeved on the roller.
7. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 6, characterized in that: The vacuum adsorption box has multiple air holes on its end face. The end face of the vacuum adsorption box is divided into an upper adsorption zone and a lower adsorption zone. The vacuum adsorption box has an upper vacuum pump that communicates with the upper adsorption zone and a lower vacuum pump that communicates with the lower adsorption zone.
8. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 7, characterized in that: The membrane roll cutter and the adhesive brush head are both located on one side of the end face of the vacuum adsorption box, and reciprocate along the radial and axial directions of the end face of the vacuum adsorption box.
9. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 8, characterized in that: The retractable transmission device consists of multiple transmission rollers arranged in a staggered manner, with multiple transmission rollers on one side moving back and forth towards multiple transmission rollers on the other side.
10. The automatic film roll cutting and splicing equipment for non-stop roll changing according to claim 9, characterized in that: A weight sensor is installed at the position of the film roll on the rotating material rack.