A BOPP film pre-treatment device

Abstract

The utility model relates to BOPP film preheating technical field, concretely is a kind of BOPP film preheating treatment device;It includes preheating box, the connecting shaft of setting in preheating box inside, traction mechanism, automatic adjusting mechanism and guide rod;Traction mechanism is set to the outside of preheating box;Automatic adjusting mechanism is set to the inside of preheating box;Guide rod is set on automatic adjusting mechanism.The utility model is through the setting of traction mechanism, pulls guide rod and drives film to move from one end of preheating box to the other end, then starts motor one to make two placement cylinder rotate together, to move the traction of film, it is ensured that the contact time, angle and distance of each part of film and heating block are even, avoid local overheating or underheating, different tracks can be changed simultaneously by traction to change the residence time of film in preheating box, so different thickness film can be controlled to preheating time, so that the applicability of preheating box is stronger.

Description

Technical Field

[0001] This utility model relates to the field of BOPP film preheating technology, and in particular to a BOPP film preheating treatment device. Background Technology

[0002] Biaxially oriented polypropylene (BOPP) film is a type of plastic film made by co-extruding polypropylene granules into sheets, and then stretching them in both longitudinal and transverse directions. BOPP film requires stretching during processing, and preheating is necessary before stretching.

[0003] Chinese Patent No. CN222554006U discloses a BOPP film preheating treatment device, including a worktable, a preheating box, a storage roller, a support shaft, a frame, an auxiliary film threading mechanism, a take-up roller, a rotary drive mechanism, and electric heating plates. The preheating box is fixed to the worktable. A support shaft is rotatably connected to the right side of the preheating box, and the storage roller is detachably mounted on the support shaft. A rotary drive mechanism is mounted on the left side of the preheating box, and the take-up roller is detachably mounted on the rotary drive mechanism. Electric heating plates are installed on both the left and right sides inside the preheating box. A frame is installed on the top of the preheating box, and an auxiliary film threading mechanism is installed on the frame. The auxiliary film threading mechanism includes a crossbar, a sliding sleeve, a substrate, a magnetic strip, and a handle. This invention facilitates the threading of BOPP film through the preheating box; the storage roller and take-up roller are easy to disassemble and replace.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: When using the existing BOPP film preheating treatment device, the operator needs to pull the film from one end to the other for assembly. However, the preheating box itself is relatively narrow and highly enclosed, so the pulling process is difficult and affects work efficiency. At the same time, the distance between the heating tube and the film cannot be adjusted during preheating, resulting in a constant heating temperature of the film, which cannot adapt to films of different thicknesses. Utility Model Content

[0005] The purpose of this invention is to address the problems in the prior art where it is impossible to quickly pull the film from one end to the other and the temperature of the heated film cannot be controlled, and to propose a BOPP film preheating treatment device.

[0006] The technical solution of this utility model is as follows: A BOPP film preheating treatment device, comprising a preheating box, a connecting shaft disposed inside the preheating box, a rotating drum rotatably disposed outside the connecting shaft, and a connecting plate disposed at the bottom of the connecting shaft; and further comprising; The traction mechanism is located on the outside of the preheating box and is used to pass the film through the preheating box and move the film for mobile preheating. An automatic adjustment mechanism is located inside the preheating chamber. It is used to detect the temperature on the film and control the heating device to move closer when the temperature is too low and to move away when the temperature is too high. And a guide rod, which is set on the automatic adjustment mechanism. A clamping plate is provided on the outside of the guide rod. Under the action of the automatic adjustment mechanism, the clamping plate is tightly attached to the guide rod. The film is wrapped around the guide rod and then pressed by the clamping plate, which drives the film to move, thereby moving the film to the other end of the preheating box.

[0007] The traction mechanism includes a traction component and a transmission component; The traction component is located at the end of the preheating box and is used to drive the film to move continuously during the preheating process. The transfer assembly is slidably mounted on the preheating box and is used to move the film from one end to the other for assembly.

[0008] The traction assembly includes a mounting frame, a motor, a shaft, and a placement cylinder; The fixed frame is located at the end of the preheating box, the motor is located at the top of the fixed frame, the rotating shaft is located at the output end of the motor, the outer side of the rotating shaft is provided with a placement cylinder, the top of the motor is provided with a rotating shaft, the top of the rotating shaft is provided with a synchronous pulley, the outer side of the synchronous pulley is provided with a synchronous belt, the end of the synchronous belt away from the synchronous pulley is provided with a synchronous pulley, and the shaft of the synchronous pulley is also provided with a rotating shaft.

[0009] The transfer assembly includes a top plate, guide rails, connecting frame, and connecting block; The top plate is located on the top of the preheating box, the guide rail is located on the top plate, the connecting frame is located on the top of the top plate, the connecting block is located at the end of the preheating box, a sliding block is slidably installed on the inner side of the connecting block, a pull rod is installed on the top of the sliding block, an mounting plate is installed on the side of the sliding block, a power rod is slidably installed on the mounting plate, and a spring is installed on the outer side of the power rod.

[0010] The automatic adjustment mechanism includes a motor, a threaded rod, a sensor, and a heating assembly; Motor 2 is located on the outside of the preheating box, the threaded rod is located at the output end of Motor 2, and the sensor is located on the inside of the preheating box; The heating component is located inside the preheating chamber and is used to heat the film inside the preheating chamber. It is also adjustable in distance by the drive of motor 2 and the threaded rod.

[0011] The heating assembly includes a threaded rod, a rotating rod, a sliding block, and a slide rail; The threaded block is threaded on the outside of the threaded rod, the rotating rod is rotatably located at the bottom of the threaded block, the sliding block 2 is rotatably located at the end of the rotating rod away from the threaded block, the slide rail is slidably located on the outside of the sliding block 2, the end of the slide rail is connected to the inside of the preheating box, the top of the sliding block 2 is provided with a vertical plate, the side of the vertical plate is provided with a fixing block, and the fixing block is provided with a heating tube.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: 1. By setting up a traction mechanism, the guide rod is pulled to move the film from one end of the preheating box to the other end. Then, the motor is started to make the two placement cylinders rotate together, thereby pulling the film. This ensures that the contact time, angle and distance between each part of the film and the heating block are uniform, avoiding local overheating or underheating. The film maintains continuous contact with the heating block during the movement. Compared with static preheating, the heat transfer efficiency is improved. At the same time, the dwell time of the film in the preheating box can be changed by pulling different tracks. This allows for control of the preheating time for films of different thicknesses, making the preheating box more applicable. In addition, the film is pulled very quickly, which can quickly complete the film installation and improve work efficiency. 2. Through the automatic adjustment mechanism, the sensor detects the temperature of the film and then controls the second motor to drive the heating tube to move. The movement of the heating tube changes the distance to the film. Compared with directly adjusting the power of the heating tube, this can correct temperature deviation more "gently" and accurately, avoid overshoot or undershoot, and stabilize the film temperature within a very narrow range of the set value. At the same time, the movement of a heating tube that is already at a high temperature is instantaneous, which allows the system to quickly respond to the acceleration, deceleration or stop of the production line and maintain a constant temperature. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the traction mechanism. Figure 3 for Figure 2 Enlarged diagram of A in the middle; Figure 4 This is a schematic diagram of the automatic adjustment mechanism; Figure 5 This is a partial structural diagram of the automatic adjustment mechanism; Reference numerals: 1. Preheating box; 201. Top plate; 202. Guide rail; 203. Connecting frame; 204. Fixing frame; 205. Motor 1; 206. Rotating shaft 1; 207. Placement cylinder; 208. Guide rod; 209. Rotating shaft 2; 210. Synchronous pulley 1; 211. Synchronous belt; 212. Synchronous pulley 2; 213. Connecting block; 214. Sliding block 1; 215. Pull rod; 216. Mounting plate; 217. Power rod; 218. Spring; 219. Clamping plate; 4. Connecting shaft; 5. Rotating cylinder; 6. Connecting plate; 301. Motor 2; 302. Threaded rod; 303. Threaded block; 304. Rotating rod; 305. Sliding block 2; 306. Slide rail; 307. Vertical plate; 308. Heating tube; 309. Fixing block; 310. Sensor. Detailed Implementation

[0014] Example 1; as Figures 1-3 As shown, the BOPP film preheating treatment device proposed in this utility model includes a preheating box 1, a connecting shaft 4 disposed inside the preheating box 1, a rotating drum 5 rotatably disposed outside the connecting shaft 4, a connecting plate 6 disposed at the bottom of the connecting shaft 4, a traction mechanism, an automatic adjustment mechanism, and a guide rod 208. The traction mechanism is located on the outside of the preheating box 1 and is used to pass the film through the preheating box 1 and move the film to perform mobile preheating; An automatic adjustment mechanism is located inside the preheating box 1 to detect the temperature on the film and control the heating device to move closer when the temperature is too low and to move away when the temperature is too high. The guide rod 208 is mounted on the automatic adjustment mechanism. A clamping plate 219 is provided on the outer side of the guide rod 208. Under the action of the automatic adjustment mechanism, the clamping plate 219 is tightly attached to the guide rod 208. The film is wrapped around the guide rod 208 and then pressed by the clamping plate 219, which drives the film to move, thereby moving the film to the other end of the preheating box 1.

[0015] The traction mechanism includes a traction component and a transfer component. The traction component is located at the end of the preheating chamber 1 and is used to continuously move the film during preheating. The transfer component is slidably mounted on the preheating chamber 1 and is used to move the film from one end to the other for assembly. The traction component includes a fixed frame 204, a motor 205, a rotating shaft 206, and a placement cylinder 207. The fixed frame 204 is located at the end of the preheating chamber 1, the motor 205 is located on top of the fixed frame 204, the rotating shaft 206 is located at the output end of the motor 205, the placement cylinder 207 is located on the outer side of the rotating shaft 206, the rotating shaft 209 is located on top of the motor 205, the synchronous pulley 210 is located on top of the rotating shaft 209, the synchronous belt 211 is located on the outer side of the synchronous pulley 210, and the end of the synchronous belt 211 away from the synchronous pulley 210 is... There is a second synchronous pulley 212, and a first rotating shaft 206 is also set at the axis of the second synchronous pulley 212. After the first motor 205 starts, it drives the placement cylinder 207 to rotate through the first rotating shaft 206. At the same time, the first motor 205 drives the second rotating shaft 209 to rotate coaxially. The second rotating shaft 209 drives the first synchronous pulley 210 to rotate. The first synchronous pulley 210 drives the second synchronous pulley 212 to rotate through the synchronous belt 211. The second synchronous pulley 212 drives the other placement cylinder 207 to rotate through another first rotating shaft 206, so that the two placement cylinders 207 rotate in the same direction, thereby traction and conveying the film. The transfer assembly includes a top plate 201, guide rails 202, a connecting frame 203, and a connecting block 213. The top plate 201 is positioned on the top of the preheating chamber 1. Two guide rails 202 are mounted on the top plate 201: one is a linear guide rail 202, and the other is a corrugated guide rail 202. The linear guide rail 202 has a shorter path within the preheating chamber 1, while the corrugated guide rail 202 has a longer path. Changing the synchronous guide rail 202 alters the residence time of the film within the preheating chamber 1. The connecting frame 203 is positioned on top of the top plate 201 and connects the spacer block forming the guide rail 202 on the top plate 201 to the top plate 201. The connecting block 213 is positioned at the end of the preheating chamber 1, and its inner side slides... A sliding block 214 is provided, and a pull rod 215 is provided on the top of the sliding block 214. The bottom of the sliding block 214 is connected to the top of the guide rod 208. A mounting plate 216 is provided on the side of the sliding block 214. A power rod 217 is slidably provided on the mounting plate 216. A spring 218 is provided on the outside of the power rod 217. The spring 218 is located between the mounting plate 216 and the clamping plate 219. After the film is wrapped around the guide rod 208 and fixed, the guide rod 208 is pulled to move along different guide rails 202. When moving on the wavy guide rail 202, the film will pass through two rotating cylinders 5 in sequence. Finally, the guide rod 208 is pulled to the other end of the preheating box 1, so that the film on it is installed on the placement cylinder 207 at the other end.

[0016] Example 2; as Figures 4-5As shown, this utility model proposes a BOPP film preheating treatment device. Compared with Embodiment 1, this embodiment details the structure of the automatic adjustment mechanism. The automatic adjustment mechanism includes a second motor 301, a threaded rod 302, a sensor 310, and a heating assembly. The second motor 301 is located on the outside of the preheating chamber 1, the threaded rod 302 is located at the output end of the second motor 301, and the sensor 310 is located on the inside of the preheating chamber 1. The sensor 310 is used to detect the temperature on the film and control the opening and closing of the second motor 301. The heating assembly is located on the inside of the preheating chamber 1 and is used to heat the film inside the preheating chamber 1 and adjust the distance under the drive of the second motor 301 and the threaded rod 302. The heating assembly includes a threaded rod 302, a rotating rod 304, a second sliding block 305, and a slide rail 306. The threaded block 303 is threaded onto the outside of the threaded rod 302. The rotating rod 304 is rotatably mounted on the bottom of the threaded block 303. The second sliding block 305 is rotatably mounted on the end of the rotating rod 304 away from the threaded block 303. Two rotating rods 304 are symmetrically arranged about the threaded block 303. The slide rail 306 is slidably mounted on the outside of the second sliding block 305. The end of the slide rail 306 is connected to the inside of the preheating box 1. The top of the second sliding block 305 is provided with… A vertical plate 307 has a fixing block 309 on its side, and a heating tube 308 is mounted on the fixing block 309. After the motor 301 starts, it drives the threaded rod 302 to rotate. The threaded rod 302 drives the threaded block 303 to move on the threaded rod 302. When the threaded block 303 moves, it drives the rotating rod 304 to rotate. The rotating rod 304 drives the sliding block 305 to slide on the slide rail 306, thereby driving the vertical plate 307 to move. The vertical plate 307 drives the heating tube 308 to move, thereby changing the distance to the film and thus controlling the heating temperature.

[0017] In summary, when using this utility model, the film is installed on the placement cylinder 207 at one end. Then, the power rod 217 is pulled to wrap the end around the guide rod 208 several times. The power rod 217 is then released, allowing the clamping plate 219 to fix the film under the action of the spring 218. The pull rod 215 is then pulled, causing the guide rod 208 to move along different guide rails 202. As it moves along the wavy guide rail 202, the film passes through two rotating cylinders 5 in sequence. Finally, the guide rod 208 is pulled to the other end of the preheating box 1, thus installing the film onto the placement cylinder 207 at the other end. After installation, the heating tube 308 is started to heat the preheating box 1. Then, the motor 205 is started. The motor 205 drives the placement cylinder 207 containing the film to rotate via the rotating shaft 206. Simultaneously, the motor 205 drives the rotating shaft 209 to rotate coaxially. 9 drives synchronous pulley 210 to rotate. Synchronous pulley 210 drives synchronous pulley 212 to rotate via synchronous belt 211. Synchronous pulley 212 drives another placement cylinder 207 to rotate via another rotating shaft 206, so that the two placement cylinders 207 rotate in the same direction, thereby traction and conveying the film. During the conveying process, sensor 310 detects the temperature on the film. When the temperature on the film is not within the suitable temperature range, motor 201 is started. Motor 201 drives threaded rod 302 to rotate. Threaded rod 302 drives threaded block 303 to move on threaded rod 302. When threaded block 303 moves, it drives rotating rod 304 to rotate. Rotating rod 304 drives sliding block 205 to slide on slide rail 306, thereby driving vertical plate 307 to move. Vertical plate 307 drives heating tube 308 to move, thereby changing the distance to the film and thus controlling the heating temperature.

[0018] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A BOPP film preheating treatment apparatus, comprising a preheating box (1), a connecting shaft (4) disposed inside the preheating box (1), a rotating drum (5) rotatably disposed outside the connecting shaft (4), and a connecting plate (6) disposed at the bottom of the connecting shaft (4); characterized in that, Also includes; The traction mechanism is located on the outside of the preheating box (1) and is used to pass the film through the preheating box (1) and move the film to perform mobile preheating. An automatic adjustment mechanism is located inside the preheating box (1) to detect the temperature on the film and control the heating device to move closer when the temperature is too low and to move away when the temperature is too high. And guide rod (208), guide rod (208) is set on automatic adjustment mechanism, and clamping plate (219) is provided on the outside of guide rod (208). Under the action of automatic adjustment mechanism, clamping plate (219) is tightly attached to guide rod (208), the film is wrapped around guide rod (208) and then the film is pressed by clamping plate (219) and driven to move, thereby driving the film to move to the other end of preheating box (1).

2. The BOPP film preheating treatment apparatus according to claim 1, characterized in that, The traction mechanism includes a traction component and a transmission component; The traction assembly is located at the end of the preheating box (1) and is used to drive the film to move continuously during the preheating process. The transfer assembly is slidably mounted on the preheating box (1) for moving the film from one end to the other for assembly.

3. The BOPP film preheating treatment apparatus according to claim 2, characterized in that, The traction assembly includes a mounting frame (204), a motor (205), a rotating shaft (206), and a placement cylinder (207). A fixed frame (204) is set at the end of the preheating box (1), a motor (205) is set at the top of the fixed frame (204), a rotating shaft (206) is set at the output end of the motor (205), a placement cylinder (207) is set on the outside of the rotating shaft (206), a rotating shaft (209) is set on the top of the motor (205), a synchronous pulley (210) is set on the top of the rotating shaft (209), a synchronous belt (211) is set on the outside of the synchronous pulley (210), a synchronous pulley (212) is set on the end of the synchronous belt (211) away from the synchronous pulley (210), and a rotating shaft (206) is also set at the center of the synchronous pulley (212).

4. The BOPP film preheating treatment apparatus according to claim 2, characterized in that, The transmission assembly includes a top plate (201), a guide rail (202), a connecting frame (203), and a connecting block (213); The top plate (201) is set on the top of the preheating box (1), the guide rail (202) is set on the top plate (201), the connecting frame (203) is set on the top of the top plate (201), the connecting block (213) is set at the end of the preheating box (1), the inner side of the connecting block (213) is slidably provided with a sliding block (214), the top of the sliding block (214) is provided with a pull rod (215), the side of the sliding block is provided with an installation plate (216), the installation plate (216) is slidably provided with a power rod (217), and the outer side of the power rod (217) is provided with a spring (218).

5. The BOPP film preheating treatment apparatus according to claim 1, characterized in that, The automatic adjustment mechanism includes a second motor (301), a threaded rod (302), a sensor (310), and a heating assembly; Motor 2 (301) is located on the outside of the preheating box (1), threaded rod (302) is located at the output end of motor 2 (301), and sensor (310) is located on the inside of the preheating box (1); The heating component is located inside the preheating box (1) and is used to heat the film inside the preheating box (1) and adjust the distance under the drive of the motor (301) and the threaded rod (302).

6. The BOPP film preheating treatment apparatus according to claim 5, characterized in that, The heating assembly includes a threaded rod (302), a rotating rod (304), a sliding block (305), and a slide rail (306); The threaded block (303) is threaded on the outside of the threaded rod (302), the rotating rod (304) is rotatably disposed at the bottom of the threaded block (303), the sliding block two (305) is rotatably disposed at the end of the rotating rod (304) away from the threaded block (303), the slide rail (306) is slidably disposed on the outside of the sliding block two (305), the end of the slide rail (306) is connected to the inside of the preheating box (1), the top of the sliding block two (305) is provided with a vertical plate (307), the side of the vertical plate (307) is provided with a fixing block (309), and the fixing block (309) is provided with a heating tube (308).

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