Plastic packaging bag stretching forming device

Abstract

The utility model relates to the technical field of plastic packaging bag production, in particular to a plastic packaging bag stretching forming device which provides power for the stretching process of a plastic mold through a stretching device, locally provides stable heat for a plastic film through a heating device, and limits and guides the plastic film through a limiting device. The stretched part of the plastic film is rapidly cooled and shaped through the cooling device, meanwhile, the situation that dust adheres to the plastic film is reduced, and the practicability of the device is improved; comprising a stretching device, a heating device, a limiting device and a cooling device, the heating device is installed on the stretching device, the limiting device is installed on the stretching device, and the cooling device is installed on the stretching device.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic packaging bag production, and in particular to a plastic packaging bag stretch forming device. Background Technology

[0002] Stretch forming of plastic packaging bags is a key process in plastic packaging production. It mainly uses mechanical stretching to orient the molecular chains of plastic materials, thereby improving the physical properties and forming effect of the film. In the production process, the plastic film is heated in a specific area, then stretched and shaped, and finally cooled and shaped.

[0003] The prior art Chinese utility model patent with application number CN202323489985.2 relates to a stretching and forming device for packaging film production, including a base plate, a guide assembly, a first structural frame, a rubber roller, a stretching assembly, a first side plate, a shaft, and a fan, etc., which can conveniently adjust the distance between the pressure rod and the shaft, thereby adjusting the stretching force of the packaging film.

[0004] In actual use, the above-mentioned device uses a fan to blow hot air to locally heat the plastic film. However, the method of blowing hot air with a fan makes it difficult to heat the plastic film evenly, resulting in uneven stretching and deformation, which affects the overall texture of the subsequent packaging bag. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a plastic packaging bag stretching and forming device that provides power to the stretching process of the plastic mold through a stretching device, provides stable heat to the plastic film locally through a heating device, limits and guides the plastic film through a limiting device, and rapidly cools and shapes the plastic film after stretching through a cooling device. At the same time, it reduces the adhesion of dust to the plastic film and improves the practicality of the device.

[0006] This utility model discloses a plastic packaging bag stretching and forming device, comprising a stretching device, a heating device, a limiting device, and a cooling device. The heating device, the limiting device, and the cooling device are all mounted on the stretching device. The stretching device provides power for the stretching process of the plastic mold, the heating device provides stable heat to the plastic film locally, the limiting device limits and guides the plastic film, and the cooling device rapidly cools and shapes the stretched portion of the plastic film, while reducing dust adhesion to the plastic film and improving the practicality of the device.

[0007] Preferably, the stretching device includes a frame, a first geared motor, a take-up roller, a discharge roller, a second geared motor, a reversing roller, and a third geared motor. A set of take-up rollers and a set of discharge rollers are mounted on the upper left side of the frame via a bracket. A set of first geared motors and a set of second geared motors are mounted on the upper and lower front sides of the bracket. The output end of the first geared motor is connected to the take-up roller, and the output end of the second geared motor is connected to the discharge roller. A reversing roller is mounted on the upper right side of the frame via a bracket. A third geared motor is mounted on the front side of the right bracket, and the output end of the third geared motor is connected to the reversing roller. Turning on the first, second, and third geared motors transmits power to the take-up roller, discharge roller, and reversing roller, respectively, causing them to rotate. The discharge roller actively releases the plastic film material. The plastic film then passes around the reversing roller and is wound up by the take-up roller. The rotation of the take-up roller provides power for stretching the plastic film, and adjusting the rotation speed of the take-up roller adjusts the stretching effect of the plastic film, improving the practicality of the device.

[0008] Preferably, the device also includes limiting guide rollers. A set of limiting guide rollers is installed on each of the left and right sets of supports on the frame. The two sets of limiting guide rollers are located on the lower left side of the reversing roller and the lower right side of the take-up roller, respectively. The right limiting guide roller limits the angle at which the plastic film enters the reversing roller, preventing the reduction of plastic film on the discharge roller from affecting the angle at which the plastic film enters the reversing roller. The left limiting guide roller adjusts the angle at which the plastic film enters the take-up roller, reducing the change in the angle between the plastic film and the reversing roller in the output direction as the amount of plastic film on the take-up roller increases, thus improving the stability and practicality of the device.

[0009] Preferably, the heating device includes a heating hood, a top heating plate, and electric heating rods. The heating hood is installed on the right support of the frame, covering the right side of the reversing roller body and extending to the left at the top. The top heating plate is installed on the top surface of the heating hood, and multiple sets of electric heating rods are evenly installed on the inner arc surface of the heating hood. By turning on the multiple sets of electric heating rods and the top heating plate, and adjusting the power of the multiple sets of electric heating rods and the top heating plate, the plastic film entering the inner area of ​​the heating hood is evenly heated, thereby softening the plastic film. The heating hood reduces heat loss and improves the practicality of the device.

[0010] Preferably, the limiting device includes a bidirectional lead screw, a limiting guide rod, a transverse block, a monitoring plate, and a vibration switch. The bidirectional lead screw and the limiting guide rod are horizontally mounted on the lower part of the right-side bracket on the frame. One end of the bidirectional lead screw is connected to a set of drive motors. Two sets of transverse blocks are symmetrically mounted on the front and rear of the bidirectional lead screw by nuts. The limiting guide rod passes through the upper part of the transverse block. A monitoring plate is connected to the upper surface of the transverse block, extending upward to the upper side of the heating cover. A vibration switch is installed on the right side of the monitoring plate. The drive motor drives the bidirectional lead screw to rotate, thereby causing the two sets of transverse blocks to move towards or away from each other, thus adjusting the distance between the two sets of monitoring plates. This allows the device to adapt to plastic films of different widths. The monitoring plate detects the position of the plastic film. When the plastic film shifts, it contacts the side of the monitoring plate, causing the monitoring plate to vibrate. The vibration switch monitors the vibration amplitude on the monitoring plate. When continuous vibration occurs, the device is controlled to stop operating, improving the protection and practicality of the device.

[0011] Preferably, the cooling device includes cooling baffles, strip-shaped air outlets, air distribution chambers, fans, and filters. Two sets of cooling baffles are installed between the left and right sets of supports on the frame. During the movement of the plastic film from the deflecting roller to the take-up roller, it is positioned between and parallel to the two sets of cooling baffles. Each of the left parts of the two sets of cooling baffles has a strip-shaped air outlet. An air distribution chamber is installed on the front face of the support, and a fan is installed on the front face of the air distribution chamber. A filter is installed on the input end of the fan, and the output end of the fan is connected to the interior of the air distribution chamber. The air distribution chamber is connected to the two sets of strip-shaped air outlets. When the fan is turned on, the outside air is pressurized and sent into the interior of the air distribution chamber. The air is then sent from the interior of the air distribution chamber to the two sets of top heating plates and sprayed out, which quickly dissipates heat and cools the plastic film, thereby stabilizing the plastic film structure. The two sets of cooling baffles reduce the impact of dust in the external environment on the plastic film, and the filter filters the dust in the outside air, improving the practicality of the device.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the stretching device provides power for the stretching process of the plastic mold, the heating device provides stable heat to the local area of ​​the plastic film, the limiting device limits and guides the plastic film, and the cooling device quickly cools and shapes the plastic film after the stretching is completed. At the same time, it reduces the situation of dust adhering to the plastic film, thus improving the practicality of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0014] Figure 2 This is a first cross-sectional structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the second cross-sectional structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the third cross-sectional structure of this utility model;

[0017] Figure 5 This is a partially enlarged structural schematic diagram of the present invention;

[0018] The following components are labeled in the attached diagram: 1. Frame; 2. First geared motor; 3. Take-up roller; 4. Discharge roller; 5. Second geared motor; 6. Reversing roller; 7. Third geared motor; 8. Limiting guide roller; 9. Heating cover; 10. Top heating plate; 11. Electric heating rod; 12. Bidirectional lead screw; 13. Limiting guide rod; 14. Transverse block; 15. Monitoring plate; 16. Vibration switch; 17. Cooling baffle; 18. Strip-shaped air outlet; 19. Air distribution chamber; 20. Fan; 21. Filter screen. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0020] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the heating device is installed on the tensioning device, the limiting device is installed on the tensioning device, and the cooling device is installed on the tensioning device.

[0021] First, the first reduction motor 2, the second reduction motor 5, and the third reduction motor 7 are turned on to transmit power to the take-up roller 3, the discharge roller 4, and the deflection roller 6, respectively, causing them to rotate. The discharge roller 4 actively releases the plastic film material. After the plastic film passes around the deflection roller 6, it is wound up by the take-up roller 3. The rotation of the take-up roller 3 provides power for stretching the plastic film, and the rotation speed of the take-up roller 3 is adjusted to regulate the stretching effect of the plastic film. Then, multiple sets of electric heating rods 11 and top heating plates 10 are turned on, and the power of the multiple sets of electric heating rods 11 and top heating plates 10 is adjusted to uniformly heat the plastic mold entering the inner area of ​​the heating cover 9, thereby softening the plastic film. Then, the fan 20 is turned on to pressurize the external air and send it into the air distribution chamber 19. The air is then distributed from the air distribution chamber 19 to the two sets of top heating plates 10 and sprayed out to quickly dissipate heat and cool the plastic film, thereby stabilizing the plastic film structure.

[0022] The stretching device includes a frame 1, a first geared motor 2, a take-up roller 3, a discharge roller 4, a second geared motor 5, a reversing roller 6, and a third geared motor 7. A set of take-up rollers 3 and discharge rollers 4 are respectively installed on the upper left side of the upper end face of the frame 1 through a bracket. A set of first geared motors 2 and second geared motors 5 are respectively installed on the upper and lower front end face of the bracket. The output end of the first geared motor 2 is connected to the take-up roller 3, and the output end of the second geared motor 5 is connected to the discharge roller 4. A reversing roller 6 is installed on the upper right side of the frame 1 through a bracket. A third geared motor 7 is installed on the front end face of the right bracket. The output end of the third geared motor 7 is connected to the reversing roller 6.

[0023] It also includes a limiting guide roller 8. A set of limiting guide rollers 8 is installed on the left and right sets of brackets on the frame 1 respectively. The two sets of limiting guide rollers 8 are located on the lower left side of the reversing roller 6 and the lower right side of the winding roller 3 respectively.

[0024] The heating device includes a heating cover 9, a top heating plate 10, and electric heating rods 11. The heating cover 9 is installed on the right support of the frame 1. The heating cover 9 covers the right side of the main body of the reversing roller 6 and extends to the left at the top. The top heating plate 10 is installed on the top surface of the heating cover 9. Multiple sets of electric heating rods 11 are evenly installed on the inner arc surface of the heating cover 9.

[0025] The limiting device includes a bidirectional lead screw 12, a limiting light rod 13, a transverse block 14, a monitoring plate 15, and a vibration switch 16. The bidirectional lead screw 12 and the limiting light rod 13 are horizontally installed on the lower part of the right support on the frame 1. One end of the bidirectional lead screw 12 is connected to a set of drive motors. Two sets of transverse blocks 14 are symmetrically installed at the front and rear of the bidirectional lead screw 12 by nuts. The limiting light rod 13 passes through the upper part of the transverse block 14. The monitoring plate 15 is connected to the upper end face of the transverse block 14. The monitoring plate 15 extends upward to the upper side of the heating cover 9. The vibration switch 16 is installed on the right side face of the monitoring plate 15.

[0026] The cooling device includes a cooling baffle 17, a strip-shaped air outlet 18, an air distribution chamber 19, a fan 20, and a filter screen 21. Two sets of cooling baffles 17 are installed between the left and right sets of brackets on the frame 1. During the process of the plastic film moving from the deflecting roller 6 to the winding roller 3, it is located between the two sets of cooling baffles 17 and parallel to the two sets of cooling baffles 17. A set of strip-shaped air outlets 18 is provided on the left side of each of the two sets of cooling baffles 17. An air distribution chamber 19 is installed on the front end face of the bracket. A fan 20 is installed on the front end face of the air distribution chamber 19. A filter screen 21 is provided on the input end of the fan 20. The output end of the fan 20 is connected to the inside of the air distribution chamber 19. The air distribution chamber 19 is connected to the two sets of strip-shaped air outlets 18.

[0027] The stretching device provides power for the stretching process of the plastic mold, the heating device provides stable heat to the local area of ​​the plastic film, the limiting device limits and guides the plastic film, and the cooling device quickly cools and shapes the plastic film after the stretching is completed. At the same time, it reduces the amount of dust adhering to the plastic film, thus improving the practicality of the device.

[0028] like Figures 1 to 5 As shown, this utility model discloses a plastic packaging bag stretching and forming device. During operation, the first reduction motor 2, the second reduction motor 5, and the third reduction motor 7 are activated to transmit power to the winding roller 3, the discharge roller 4, and the reversing roller 6, respectively, causing them to rotate. The discharge roller 4 actively releases the plastic film material. The plastic film then passes around the reversing roller 6 and is wound up by the winding roller 3. The rotation of the winding roller 3 provides power for stretching the plastic film, and the rotation speed of the winding roller 3 is adjusted to regulate the stretching effect. Next, multiple sets of electric heating rods 11 and the top heating plate 10 are activated, and their power is adjusted to uniformly heat the plastic mold entering the heating hood 9, thereby softening the plastic film. Then, the fan 20 is activated to pressurize external air and send it into the air distribution chamber 19. The air is then partially distributed from the air distribution chamber 19 to the two sets of top heating plates 10 for rapid heat dissipation and cooling of the plastic film, thus stabilizing the plastic film structure.

[0029] The blower 20, first geared motor 2, second geared motor 5, third geared motor 7 and vibration switch 16 of the plastic packaging bag stretching and forming device of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A plastic packaging bag stretching and forming device; characterized in that, It includes a stretching device, a heating device, a limiting device, and a cooling device. The heating device is installed on the stretching device, the limiting device is installed on the stretching device, and the cooling device is installed on the stretching device.

2. The plastic packaging bag stretching and forming device as described in claim 1, characterized in that, The stretching device includes a frame (1), a first geared motor (2), a take-up roller (3), a discharge roller (4), a second geared motor (5), a reversing roller (6), and a third geared motor (7). A set of take-up rollers (3) and discharge rollers (4) are installed on the upper left side of the frame (1) through a bracket. A set of first geared motors (2) and second geared motors (5) are installed on the upper and lower front sides of the bracket. The output end of the first geared motor (2) is connected to the take-up roller (3), and the output end of the second geared motor (5) is connected to the discharge roller (4). A reversing roller (6) is installed on the upper right side of the frame (1) through a bracket. A third geared motor (7) is installed on the front side of the right bracket. The output end of the third geared motor (7) is connected to the reversing roller (6).

3. The plastic packaging bag stretching and forming device as described in claim 2, characterized in that, It also includes a limiting guide roller (8). A set of limiting guide rollers (8) is installed on the left and right sets of brackets on the frame (1). The two sets of limiting guide rollers (8) are located on the lower left side of the reversing roller (6) and the lower right side of the winding roller (3).

4. The plastic packaging bag stretching and forming device as described in claim 3, characterized in that, The heating device includes a heating cover (9), a top heating plate (10), and electric heating rods (11). The heating cover (9) is installed on the right support of the frame (1). The heating cover (9) covers the right side of the main body of the reversing roller (6) and extends to the left at the top. The top heating plate (10) is installed on the top surface of the heating cover (9). Multiple sets of electric heating rods (11) are evenly installed on the inner arc surface of the heating cover (9).

5. The plastic packaging bag stretching and forming device as described in claim 4, characterized in that, The limiting device includes a bidirectional lead screw (12), a limiting light rod (13), a transverse block (14), a monitoring plate (15), and a vibration switch (16). The bidirectional lead screw (12) and the limiting light rod (13) are horizontally installed on the lower part of the right support on the frame (1). One end of the bidirectional lead screw (12) is connected to a set of drive motors. Two sets of transverse blocks (14) are symmetrically installed in front and behind the bidirectional lead screw (12) by nuts. The limiting light rod (13) passes through the upper part of the transverse block (14). The monitoring plate (15) is connected to the upper end face of the transverse block (14). The monitoring plate (15) extends upward to the upper side of the heating cover (9). The vibration switch (16) is installed on the right side face of the monitoring plate (15).

6. The plastic packaging bag stretching and forming device as described in claim 5, characterized in that, The cooling device includes a cooling baffle (17), a strip air outlet (18), an air distribution chamber (19), a fan (20), and a filter screen (21). Two sets of cooling baffles (17) are installed between the left and right sets of brackets on the frame (1). The plastic film is located between the two sets of cooling baffles (17) and parallel to the two sets of cooling baffles (17) during the process of moving from the reversing roller (6) to the winding roller (3). A set of strip air outlets (18) is provided on the left side of each of the two sets of cooling baffles (17). An air distribution chamber (19) is installed on the front end face of the bracket. A fan (20) is installed on the front end face of the air distribution chamber (19). A filter screen (21) is provided on the input end of the fan (20). The output end of the fan (20) is connected to the inside of the air distribution chamber (19). The air distribution chamber (19) is connected to the two sets of strip air outlets (18).

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