Constant-temperature stretching equipment for plastic product processing and use method of constant-temperature stretching equipment

Abstract

The invention discloses constant-temperature stretching equipment for plastic product processing and a using method thereof, and relates to the field of plastic product processing, the constant-temperature stretching equipment comprises a mounting plate, a driving mechanism is mounted on one side of the mounting plate, and a switching mechanism is fixedly connected to one side of the mounting plate. According to the double-station design, the belt assembly is driven through the servo motor, synchronous matched movement of the first station and the second station is achieved, the first station keeps horizontal linear sliding, and the stability of the detection process is ensured; the second station realizes high-precision movement through a guide rod and a guide hole, and cooperates with the first station to complete position staggering and mutual matching, the accuracy and reliability of system operation are further enhanced under the dual action of a guide structure and a slide rail, and the double-station design not only improves the efficiency of film detection and tensile test, but also improves the production efficiency. And the functions of rapid discharging and automatic material changing are achieved, the operation process is greatly optimized, and the system effectively guarantees the consistency in the stretching detection process while guaranteeing the precision and the stability.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic product processing, and particularly to a constant-temperature stretching device for plastic product processing and its usage method. Background Art

[0002] In the process of large-scale plastic film production, even if the same raw materials and production processes are used, the performance of the film may vary due to some minor factors (such as temperature and humidity changes or slight fluctuations in the equipment). Tensile testing can detect each batch of films to ensure the consistency of product performance between different batches.

[0003] For example, in the "constant-temperature stretching device for plastic product processing" with the publication number: CN118583632A, the outer surface of the moving table is fixedly connected to one end of the threaded sleeve away from the motor, and the outer surface of the moving table is slidably connected to the inner wall of the fixed frame. Clamps are symmetrically arranged at the interval between the fixed frame and the moving table. The two groups of clamps are respectively fixedly connected to the bottom of the inner wall of the fixed frame and the bottom of the moving table on the sides away from each other, and the number of each group of clamps is set to be several. The symmetrically arranged clamps can fix the specimen in a vertical state, so that both ends of the specimen are uniformly stressed. When the specimen is stretched and broken, the fracture position is always within a certain range in the middle, which is convenient for observation or measurement.

[0004] However, in the prior art, in the process of plastic film processing, if multiple devices are used for tensile testing in the detection link, although the detection efficiency can be improved to a certain extent, more variables will be introduced in multi-device stretching, making it difficult to ensure that the stretching environmental conditions of each plastic film are the same, so that the multi-device detection is difficult to guarantee the consistency of the detection results. If a single device is used, its detection throughput is very limited, and only a small number of plastic film samples can be detected each time, and the efficiency is low when replacing plastic films and during maintenance. Summary of the Invention

[0005] The purpose of the present invention is to provide a constant-temperature stretching device for plastic product processing and its usage method to solve the problem in the above background art that it is impossible to balance the consistency and efficiency of tensile testing simultaneously.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A constant-temperature stretching device for plastic product processing, including a mounting plate, a driving mechanism is installed on one side of the mounting plate, and a switching mechanism is fixedly connected to one side of the mounting plate; The switching mechanism includes a fixed frame, a central plate is fixedly connected to the inside of the fixed frame, second tracks are arranged on both sides of the central plate, the second tracks are fixedly connected to the inner wall of the fixed frame, two first sliding rails are fixedly connected to one side of the fixed frame, a first sliding block is slidably connected to the surface of the first sliding rail, a first working position is fixedly connected to one end of the first sliding block, a second sliding block is slidably connected to the outer surface of the second track, a moving frame is fixedly connected to one end of the second sliding block, a support rod is slidably connected to the surface of the moving frame, a second working position is fixedly connected to one end of the support rod, a moving rod is fixedly connected to the center of the inside of the second working position, a guiding rod is fixedly connected to one end of the moving rod, a guiding hole is formed on the surface of the central plate, and the guiding rod is slidably connected to the guiding hole. A belt assembly is rotatably connected to the outer wall of the fixed frame, two clamping blocks are engaged with the surface of the belt assembly, one of the clamping blocks is fixedly connected to the first working position, and the other clamping block is fixedly connected to the second working position. Tensile mechanisms are installed on the side walls of both the second working position and the first working position.

[0007] Preferably, a servo motor is installed at the bottom end of the fixed frame, the output end of the servo motor is fixedly connected to the input end of the belt assembly, a first sliding rod is fixedly connected to the bottom end of the fixed frame, a third sliding block is slidably connected to the surface of the first sliding rod, the third sliding block is fixedly connected to the second working position, and limiters are fixedly connected to both sides of the bottom end of the fixed frame.

[0008] Preferably, the tensile mechanism includes a first fixing plate and a second fixing plate, two second sliding rods are fixedly connected to the bottom end of the first fixing plate, a lifting plate is slidably connected to the outer surface of the second sliding rods, and two locking members are installed on the opposite sides of the lifting plate and the second fixing plate, and the locking members are used for positioning the plastic film.

[0009] Preferably, a connecting rod is fixedly connected to the center of the top of the lifting plate, the top end of the connecting rod penetrates through the first fixing plate, and a return-shaped frame is fixedly connected to the top end of the connecting rod.

[0010] Preferably, the locking member includes a support frame, two rotating rods are rotatably connected to the inside of the support frame, positioning plates are fixedly connected to the outer surfaces of the two rotating rods, and a limiting rod is fixedly connected to the center of the bottom of the inner cavity of the support frame.

[0011] Preferably, a threaded rod is threadedly connected to the bottom end of one of the positioning plates, and a third fixing plate is fixedly connected to the inner wall of the bottom end of the other positioning plate.

[0012] Preferably, clamping grooves are formed on the inner sides of the two positioning plates, and a spring is installed between the two positioning plates, and both ends of the spring are clamped inside the clamping grooves.

[0013] Preferably, the driving mechanism includes a movable frame. The top side wall and the bottom of the movable frame are both fixedly connected with cylinders. The cylinders are fixedly connected with the side wall of the mounting plate. One side of the cylinder is provided with a telescopic sleeve. The two ends of the telescopic sleeve are respectively fixedly connected with the mounting plate and the movable frame.

[0014] Preferably, a hydraulic cylinder is installed on the top of the movable frame. The bottom end of the hydraulic cylinder penetrates through the movable frame, and the bottom end of the hydraulic cylinder is fixedly connected with a hook. The hook is engaged with the looped frame. A heater is installed on the side wall of the movable frame.

[0015] A method for using a constant-temperature stretching device for plastic product processing includes the following steps: Step 1, positioning and fixing the film. Place the film between the lifting plate and the second fixing plate and fix it through four locking members. When the threaded rod is rotated, the positioning plate will move relatively, and through the third fixing plate, it will push another positioning plate. Under the action of the rotating rod, the two positioning plates start to close, clamp the top end of the film, and at the same time compress the spring to ensure that the positioning plate does not break away. When the threaded rod is rotated in the reverse direction, with the elastic action of the spring, the two positioning plates will quickly separate and be restricted by the limiting rod; Step 2, starting the stretching operation. The looped frame drives the lifting plate to slide along the surface of the second sliding rod through the connecting rod, thereby starting to stretch the plastic film. The sliding of the lifting plate is completed through the movement of the looped frame; Step 3, stable control during the stretching process. The cylinder controls the movement of the movable frame to ensure the stability of the lifting plate. The rod inside the telescopic sleeve slides when the movable frame moves. When the movable frame approaches the plastic film, the hook at the bottom end of the hydraulic cylinder catches the looped frame and drives it to move for stretching the film. The heater provides hot air, and through the temperature sensor, the temperature during the stretching process is ensured to be consistent; Step 4, station switching. The servo motor drives the belt assembly to rotate, driving the two blocks to move in opposite directions, so that the first station and the second station approach. The first station maintains horizontal movement, and the second station drives the moving rod to move together. The guide rod slides through the guide hole of the central plate to ensure that the second station approaches the first station in a staggered manner; Step 5, stopping and precise positioning. When the first station collides with the limiter, the servo motor stops running. The movement of the first station is controlled by the sliding of the first slider and the third slider on the slide rail, and the movement of the second station is a linear movement controlled by the sliding of the second slider on the guide rail.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In the present invention, the dual-station design drives the belt assembly through a servo motor to achieve synchronous cooperative movement of the first station and the second station. The first station maintains horizontal linear sliding to ensure the stability of the detection process; the second station achieves high-precision movement through guide rods and guide holes, and at the same time cooperates with the first station to complete position staggering and mutual cooperation. The dual effects of the guiding structure and the slide rail further enhance the accuracy and reliability of the system operation. The dual-station design not only improves the efficiency of film detection and tensile testing, but also realizes the functions of rapid blanking and automatic material change, greatly optimizing the operation process. While ensuring accuracy and stability, this system effectively guarantees the consistency during the tensile detection process.

[0017] 2. In the present invention, the stretching operation system ensures uniform stretching of the film through precise positioning and a stable movement mechanism. Four locking parts and the positioning plate driven by the threaded rod ensure the stable positioning of the film between the lifting plate and the fixing plate, and maintain stability through compression springs during the closing process. The card slots and limit rods effectively prevent the spring from dislocating or the positioning plate from opening excessively, ensuring the reliability and convenience of the operation. The smooth movement of the lifting plate and the clamping cooperation of the positioning plate achieve uniform stress on the film, avoiding tearing or deformation. This design improves the efficiency, stability and accuracy of the stretching operation, provides efficient guarantee for film processing, and optimizes the production process.

[0018] 3. In the present invention, the plastic film stretching operation system drives the movable frame through a cylinder and controls the precise movement of the loop-shaped frame through a hydraulic cylinder to ensure uniform and stable stress on the film. The movable frame moves smoothly under the guidance of the telescopic sleeve, avoiding tilting or jittering, and ensuring the accuracy and safety of the operation. The hydraulic cylinder adjusts the movement range and stretching force of the loop-shaped frame to meet the requirements of different film specifications. The combination of the heater and the temperature sensor ensures the uniformity of the film surface temperature, avoiding quality problems caused by temperature fluctuations. The efficient and stable motion control and intelligent temperature monitoring of this system greatly improve the reliability of the stretching process and the product quality, meeting the high standards required in production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of a constant-temperature stretching device for plastic product processing according to the present invention; Figure 2 is the structural schematic diagram of a switching mechanism of a constant-temperature stretching device for plastic product processing according to the present invention; Figure 3 is the side view structural schematic diagram of a switching mechanism of a constant-temperature stretching device for plastic product processing according to the present invention; Figure 4 is the disassembled structural schematic diagram of a switching mechanism of a constant-temperature stretching device for plastic product processing according to the present invention; Figure 5Schematic structural diagram of a driving mechanism of a constant-temperature stretching device for plastic product processing according to the present invention; Figure 6 Schematic structural diagram of a stretching mechanism of a constant-temperature stretching device for plastic product processing according to the present invention; Figure 7 Schematic structural diagram of a locking member of a constant-temperature stretching device for plastic product processing according to the present invention.

[0020] In the figure: 1. mounting plate; 2. switching mechanism; 21. fixing frame; 211. first slide rail; 212. limiter; 22. second track; 23. center plate; 231. guiding hole; 24. first working station; 241. first slider; 25. second working station; 251. moving frame; 252. second slider; 253. support rod; 26. moving rod; 261. guiding rod; 27. third slider; 271. first slide bar; 28. belt assembly; 281. servo motor; 29. clamping block; 3. stretching mechanism; 31. first fixing plate; 32. lifting plate; 33. second slide bar; 34. loop-shaped frame; 35. connecting rod; 36. second fixing plate; 4. driving mechanism; 41. telescopic sleeve; 42. cylinder; 43. movable frame; 44. heater; 45. hydraulic cylinder; 46. hook; 5. locking member; 51. support frame; 52. positioning plate; 53. rotating rod; 54. clamping groove; 55. spring; 56. limiting rod; 57. threaded rod; 58. third fixing plate. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Example 1: Refer to Figure 1 - Figure 4 As shown in the figure: A constant-temperature stretching device for plastic product processing includes a mounting plate 1, a driving mechanism 4 is installed on one side of the mounting plate 1, and a switching mechanism 2 is fixedly connected to one side of the mounting plate 1; The switching mechanism 2 includes a fixed frame 21. In the center of the inner side of the fixed frame 21, a center plate 23 is fixedly connected. On both sides of the center plate 23, second tracks 22 are provided, and the second tracks 22 are fixedly connected to the inner wall of the fixed frame 21. On one side of the fixed frame 21, two first sliding rails 211 are fixedly connected. On the surface of the first sliding rails 211, a first slider 241 is slidably connected. One end of the first slider 241 is fixedly connected to a first working position 24. On the outer surface of the second track 22, a second slider 252 is slidably connected. One end of the second slider 252 is fixedly connected to a moving frame 251. On the surface of the moving frame 251, a support rod 253 is slidably connected. One end of the support rod 253 is fixedly connected to a second working position 25. In the center of the inner side of the second working position 25, a moving rod 26 is fixedly connected. One end of the moving rod 26 is fixedly connected to a guide rod 261. On the surface of the center plate 23, a guide hole 231 is formed, and the guide hole 231 is slidably connected to the guide rod 261. On the outer wall of the fixed frame 21, a belt assembly 28 is rotatably connected. On the surface of the belt assembly 28, two clamping blocks 29 are engaged. One of the clamping blocks 29 is fixedly connected to the first working position 24, and the other clamping block 29 is fixedly connected to the second working position 25. On the side walls of the second working position 25 and the first working position 24, a stretching mechanism 3 is installed.

[0023] At the bottom end of the fixed frame 21, a servo motor 281 is installed. The output end of the servo motor 281 is fixedly connected to the input end of the belt assembly 28. At the bottom end of the fixed frame 21, a first sliding rod 271 is fixedly connected. On the surface of the first sliding rod 271, a third slider 27 is slidably connected. The third slider 27 is fixedly connected to the second working position 25. On both sides of the bottom end of the fixed frame 21, limiters 212 are fixedly connected.

[0024] In this embodiment, the rotation of the belt assembly 28 is driven by the servo motor 281. When the belt assembly 28 is started, the two clamping blocks 29 located on both sides of the belt surface are driven to move. Since the two clamping blocks 29 are respectively installed on both sides of the belt assembly 28 and move in opposite directions, during the movement, the two clamping blocks 29 can cooperate with each other to gradually bring the first working position 24 and the second working position 25 closer, thereby forming a collaborative working mechanism.

[0025] During this process, the first working position 24 maintains a horizontal linear movement to ensure the stability of the detection process. At the same time, the movement of the second working position 25 not only pushes itself but also performs synchronous movement through the connected moving rod 26. During this process, the guide rod 261 at the bottom end of the moving rod 26 will be inserted into the guide hole 231 of the center plate 23 and slide smoothly along the trajectory of the guide hole 231. The guiding structure of the center plate 23 plays a key role in restricting the movement path and ensuring the movement accuracy, making the entire movement process smoother and without deviation.

[0026] In addition, when the moving frame 251 moves at the second station 25, it also maintains horizontal sliding. At this time, relative sliding occurs between the support rod 253 and the moving frame 251, thereby controlling the second station 25 to achieve staggered positions when approaching the first station 24, enabling the two stations to cooperate with each other. Under the dual guiding effects of the guiding hole 231 and the guiding rod 261, the central plate 23 can accurately move to the specified position, ensuring the accuracy and repeatability of subsequent operations.

[0027] When the first station 24 moves and collides with the stopper 212, the servo motor 281 will immediately stop running to avoid overshoot or position deviation. At the same time, in order to ensure that the first station 24 always remains stable during movement, the first slider 241 at its bottom slides smoothly along the surface of the first slide rail 211. The third slider 27 also moves synchronously on the surface of the first slide rod 271, further strengthening the stability of the first station 24 and effectively preventing tilting or deviation during operation.

[0028] Similarly, during the movement of the second station 25, through the cooperation of the second slider 252 and the second track 22, high-precision linear movement can be achieved. This design ensures that the second station 25 does not tilt during movement, providing guarantee for the accuracy of subsequent operations.

[0029] The dual-station design makes full use of the cooperation between the first station 24 and the second station 25. It not only facilitates the rapid blanking of the film that has been detected during the detection process, but also enables the timely replacement of a new film for subsequent detection operations. Through this efficient system, the efficiency of film detection and tensile testing has been greatly improved, and the consistency during the tensile detection process has also been ensured.

[0030] Embodiment 2: Figure 6 and Figure 7 As shown, the stretching mechanism 3 includes a first fixing plate 31 and a second fixing plate 36. Two second slide rods 33 are fixedly connected to the bottom end of the first fixing plate 31. A lifting plate 32 is slidably connected to the outer surface of the second slide rods 33. Two locking members 5 are installed on the opposite sides of the lifting plate 32 and the second fixing plate 36, and the locking members 5 are used for positioning the plastic film. A connecting rod 35 is fixedly connected to the center of the top of the lifting plate 32. The top end of the connecting rod 35 penetrates through the first fixing plate 31, and the top end of the connecting rod 35 is fixedly connected to a loop-shaped frame 34. The locking member 5 includes a support frame 51. Two rotating rods 53 are rotatably connected to the inner side of the support frame 51. Positioning plates 52 are fixedly connected to the outer surfaces of the two rotating rods 53. A limiting rod 56 is fixedly connected to the center of the bottom of the inner cavity of the support frame 51. A threaded rod 57 is threadedly connected to the bottom end of one of the positioning plates 52, and a third fixing plate 58 is fixedly connected to the inner wall of the bottom end of the other positioning plate 52. Card slots 54 are formed in the inner sides of the two positioning plates 52, and a spring 55 is installed between the two positioning plates 52. Both ends of the spring 55 are stuck inside the card slots 54.

[0031] In this embodiment, during the stretching operation, the film is stably placed between the lifting plate 32 and the second fixing plate 36, and four locking members 5 are used for precise positioning. By turning the threaded rod 57, the two positioning plates 52 will gradually move relative to each other. During this process, the rotation of the threaded rod 57 drives the third fixing plate 58 to push one of the positioning plates 52, and at the same time, the other positioning plate 52 also starts to move under the influence of the reaction force, so as to realize the rotational movement of the two positioning plates 52 centered on the rotating rod 53.

[0032] In the positioning action, the two positioning plates 52 start to close, and their tops clamp and position the film to ensure the stability and accuracy of the film during the stretching process. During the closing process, the movement of the positioning plate 52 will squeeze the spring 55, making it in a compressed state. At the same time, the design of the card slot 54 effectively clamps the spring 55 to prevent the spring 55 from being displaced due to force, ensuring the stability and reliability of the entire clamping and positioning process.

[0033] When the film needs to be replaced, by turning the threaded rod 57 in the reverse direction, the elastic force of the spring 55 will quickly push the two positioning plates 52 apart. During this process, the limit rod 56 plays a key constraining role, restricting the dispersion range of the two positioning plates 52 and preventing the positioning plates 52 from opening too much. Such a design facilitates the subsequent rapid placement of a new plastic film, significantly improving the positioning efficiency and operation convenience.

[0034] In the actual stretching operation, the return-shaped frame 34 drives the connecting rod 35 to move together through its driving force, and pushes the lifting plate 32 to slide smoothly along the surface of the second sliding rod 33. The guiding function of the second sliding rod 33 ensures that the lifting plate 32 always maintains a stable linear motion during the stretching process, avoiding interference with the film stretching caused by position deviation or vibration.

[0035] In addition, the precise movement of the lifting plate 32 and the reliable clamping of the positioning plate 52 are combined to ensure that the film is evenly stressed during the stretching process, avoiding the phenomenon of film tearing or deformation. This system design realizes the high efficiency and reliability of the stretching operation, and at the same time improves the control accuracy of the film stretching process, providing an important guarantee for the film processing in actual production.

[0036] Example 3: According to Figure 5As shown in the figure, the driving mechanism 4 includes a movable frame 43. Cylinders 42 are fixedly connected to both the top side wall and the bottom of the movable frame 43. The cylinders 42 are fixedly connected to the side wall of the mounting plate 1. A telescopic sleeve 41 is installed on one side of the cylinder 42. The two ends of the telescopic sleeve 41 are respectively fixedly connected to the mounting plate 1 and the movable frame 43. A hydraulic cylinder 45 is installed on the top of the movable frame 43. The bottom end of the hydraulic cylinder 45 penetrates through the movable frame 43, and a hook 46 is fixedly connected to the bottom end of the hydraulic cylinder 45. The hook 46 is engaged with the U-shaped frame 34. A heater 44 is installed on the side wall of the movable frame 43.

[0037] In this embodiment, during the stretching operation of the plastic film, the movement of the movable frame 43 is controlled by the drive of the cylinder 42. Driven by the cylinder 42, the movable frame 43 can move smoothly to complete the positioning and stretching tasks. During this process, the rod inside the telescopic sleeve 41 provides guiding support during sliding, ensuring that the movable frame 43 always maintains stability during movement, avoiding tilting or shaking, thereby ensuring the accuracy and safety of the operation. When the movable frame 43 approaches the plastic film, the hydraulic cylinder 45 starts to operate, and the hook 46 at its bottom end accurately snaps into the inside of the U-shaped frame 34. Through the lifting action of the hydraulic cylinder 45, the hook 46 can firmly connect and drive the U-shaped frame 34 to move along the set track, thereby applying a uniform stretching force to the plastic film.

[0038] During the stretching operation, both the movement range and the stretching force of the U-shaped frame 34 can be accurately adjusted by the control of the hydraulic cylinder 45 to meet the stretching requirements of plastic films of different specifications. To ensure the stretching effect of the plastic film, the heater 44 evenly blows hot air on the surface of the film, so that the film reaches the required heating temperature during the stretching process. At the same time, the temperature sensor inside the movable frame 43 continuously monitors the surface temperature of the film and transmits the data to the control system. Through temperature monitoring, it can be ensured that the temperature is consistent during each stretching process, avoiding uneven stress or quality problems of the film caused by temperature fluctuations. In addition, during the stretching process, the stretching time is short, and the temperature of the film during stretching will not change significantly, thus ensuring the temperature consistency during the stretching process.

[0039] Embodiment 4: A method for using a constant-temperature stretching device for plastic product processing, including the following steps: 1) Position and fix the film. Place the film between the lifting plate 32 and the second fixing plate 36 and fix it with four locking members 5. When the threaded rod 57 is turned, the positioning plate 52 will move relatively, and through the third fixing plate 58, it will push another positioning plate 52. The two positioning plates 52 start to close under the action of the rotating rod 53, clamping the top end of the film, while compressing the spring 55 to ensure that the positioning plate 52 does not break away. When the threaded rod 57 is turned in the reverse direction, with the elastic action of the spring 55, the two positioning plates 52 will quickly separate and be restricted by the limiting rod 56; 2) Start of the stretching operation. The wire rack 34 drives the lifting plate 32 to slide along the surface of the second slide bar 33 through the connecting rod 35, thereby starting to stretch the plastic film. The sliding of the lifting plate 32 is completed through the movement of the wire rack 34; 3) Stable control during the stretching process. The cylinder 42 controls the movement of the movable frame 43 to ensure the stability of the lifting plate 32. The rod inside the telescopic sleeve 41 slides when the movable frame 43 moves. When the movable frame 43 approaches the plastic film, the hook 46 at the bottom end of the hydraulic cylinder 45 catches the wire rack 34 and drives its movement to stretch the film. The heater 44 provides hot air and ensures a consistent temperature during the stretching process through the temperature sensor; 4) Station switching. The servo motor 281 drives the belt assembly 28 to rotate, driving the two blocks 29 to move in opposite directions, thereby bringing the first station 24 and the second station 25 closer. The first station 24 moves horizontally, and the second station 25 drives the moving rod 26 to move together. The guide rod 261 slides through the guide hole 231 of the center plate 23 to ensure that the second station 25 approaches the first station 24 in an interleaved manner; 5) Stop and precise positioning. When the first station 24 collides with the stopper 212, the servo motor 281 stops running. The movement of the first station 24 is controlled by the sliding of the first slider 241 and the third slider 27 on the slide rail, and the movement of the second station 25 is a linear motion controlled by the sliding of the second slider 252 on the guide rail.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A constant-temperature stretching device for plastic product processing, including a mounting plate (1), and a driving mechanism (4) is installed on one side of the mounting plate (1), characterized in that: One side of the mounting plate (1) is fixedly connected with a switching mechanism (2). The switching mechanism (2) includes a fixing frame (21). In the center of the inner side of the fixing frame (21), a center plate (23) is fixedly connected. On both sides of the center plate (23), second tracks (22) are arranged. The second tracks (22) are fixedly connected with the inner wall of the fixing frame (21). On one side of the fixing frame (21), two first slide rails (211) are fixedly connected. The surface of the first slide rail (211) is slidably connected with a first slider (241). One end of the first slider (241) is fixedly connected with a first working position (24). The outer surface of the second track (22) is slidably connected with a second slider (252). One end of the second slider (252) is fixedly connected with a moving frame (251). The surface of the moving frame (251) is slidably connected with a support rod (253). One end of the support rod (253) is fixedly connected with a second working position (25). In the center of the inner side of the second working position (25), a moving rod (26) is fixedly connected. One end of the moving rod (26) is fixedly connected with a guide rod (261). A guide hole (231) is formed on the surface of the center plate (23). The guide hole (231) is slidably connected with the guide rod (261). A belt assembly (28) is rotatably connected to the outer wall of the fixing frame (21). Two blocks (29) are engaged with the surface of the belt assembly (28). One of the blocks (29) is fixedly connected with the first working position (24), and the other block (29) is fixedly connected with the second working position (25). Tensioning mechanisms (3) are installed on the side walls of the second working position (25) and the first working position (24).

2. The thermostatic stretching device for plastic product processing according to claim 1, characterized in that: A servo motor (281) is installed at the bottom end of the fixing frame (21). The output end of the servo motor (281) is fixedly connected with the input end of the belt assembly (28). A first slide rod (271) is fixedly connected to the bottom end of the fixing frame (21). The surface of the first slide rod (271) is slidably connected with a third slider (27). The third slider (27) is fixedly connected with the second working position (25). Limiters (212) are fixedly connected to both sides of the bottom end of the fixing frame (21).

3. The constant-temperature stretching device for plastic product processing according to claim 1, wherein: The tensioning mechanism (3) includes a first fixing plate (31) and a second fixing plate (36). Two second slide rods (33) are fixedly connected to the bottom end of the first fixing plate (31). The outer surface of the second slide rod (33) is slidably connected with a lifting plate (32). Two locking members (5) are installed on the opposite sides of the lifting plate (32) and the second fixing plate (36). The locking members (5) are used for positioning the plastic film.

4. An isothermal stretching device for plastic product processing according to claim 3, characterized in that: A connecting rod (35) is fixedly connected to the center of the top of the lifting plate (32). The top end of the connecting rod (35) penetrates through the first fixing plate (31). The top end of the connecting rod (35) is fixedly connected with a return frame (34).

5. The thermostatic stretching device for plastic product processing according to claim 3, characterized in that: The locking member (5) includes a support frame (51). Two rotating rods (53) are rotatably connected to the inner side of the support frame (51). Positioning plates (52) are fixedly connected to the outer surfaces of the two rotating rods (53). A limiting rod (56) is fixedly connected to the center of the bottom of the inner cavity of the support frame (51).

6. The thermostatic stretching device for plastic product processing according to claim 5, characterized in that: A threaded rod (57) is threadedly connected to the bottom end of one of the positioning plates (52). A third fixing plate (58) is fixedly connected to the inner bottom wall of the other positioning plate (52).

7. An isothermal stretching device for plastic product processing according to claim 6, characterized in that: Card slots (54) are formed in the inner sides of the two positioning plates (52). A spring (55) is installed between the two positioning plates (52). Both ends of the spring (55) are stuck inside the card slots (54).

8. The thermostatic stretching device for plastic product processing according to claim 1, wherein: The driving mechanism (4) includes a movable frame (43). Cylinders (42) are fixedly connected to the top side wall and the bottom side wall of the movable frame (43). The cylinders (42) are fixedly connected to the side wall of the mounting plate (1). A telescopic sleeve (41) is installed on one side of the cylinder (42). The two ends of the telescopic sleeve (41) are respectively fixedly connected to the mounting plate (1) and the movable frame (43).

9. The thermostatic stretching device for plastic product processing according to claim 8, wherein: A hydraulic cylinder (45) is installed on the top of the movable frame (43). The bottom end of the hydraulic cylinder (45) penetrates through the movable frame (43). The bottom end of the hydraulic cylinder (45) is fixedly connected to a hook (46). The hook (46) is engaged with the loop-shaped frame (34). A heater (44) is installed on the side wall of the movable frame (43).

10. A method for using a constant-temperature stretching device for plastic product processing, characterized in that, When using a constant-temperature stretching device for plastic product processing described in any one of the above claims 1-9, it includes the following steps: S1. Position and fix the film. Place the film between the lifting plate (32) and the second fixing plate (36), and fix it with four locking members (5). When the threaded rod (57) is turned, the positioning plates (52) will move relatively, and push the other positioning plate (52) through the third fixing plate (58). The two positioning plates (52) start to close under the action of the rotating rods (53), clamp the top end of the film, and compress the spring (55) at the same time to ensure that the positioning plates (52) will not disengage. When the threaded rod (57) is turned in the reverse direction, with the elastic action of the spring (55), the two positioning plates (52) will quickly separate and be restricted by the limiting rod (56); S2. Start the stretching operation. The loop-shaped frame (34) drives the lifting plate (32) to slide along the surface of the second sliding rod (33) through the connecting rod (35), so as to start stretching the plastic film. The sliding of the lifting plate (32) is completed by the movement of the loop-shaped frame (34); S3. Stable control during the stretching process. The cylinder (42) controls the movement of the movable frame (43) to ensure the stability of the lifting plate (32). The rod inside the telescopic sleeve (41) slides when the movable frame (43) moves. When the movable frame (43) approaches the plastic film, the hook (46) at the bottom end of the hydraulic cylinder (45) catches the loop-shaped frame (34) and drives it to move for stretching the film. The heater (44) provides hot air, and the temperature sensor ensures that the temperature is consistent during the stretching process; S4. Station switching: The servo motor (281) drives the belt assembly (28) to rotate, driving the two clamping blocks (29) to move in opposite directions, so that the first station (24) and the second station (25) approach. The first station (24) moves horizontally, and the second station (25) drives the moving rod (26) to move together. The guiding rod (261) slides through the guiding hole (231) of the central plate (23) to ensure that the second station (25) approaches the first station (24) staggeredly. S5. Stopping and precise positioning: When the first station (24) collides with the stopper (212), the servo motor (281) stops running. The movement of the first station (24) is controlled by the sliding of the first slider (241) and the third slider (27) on the slide rail, and the movement of the second station (25) is a linear motion controlled by the sliding of the second slider (252) on the guide rail.

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