Blow molding process for protective films

Abstract

The present invention discloses a blow molding process for protective film, including a support base and a blow molding head mounted on the support base, a traction frame is arranged above the support base, two oppositely arranged fixed plates are installed on the traction frame, a second electric cylinder is installed on the outer surface of one of the fixed plates opposite to the other fixed plate, the movable end of the second electric cylinder passes through the corresponding fixed plate and is connected to the second mounting plate located on the inner side of the fixed plate; the other end of the long strip extends away from the outer side of the other second mounting plate, a mounting rod is connected to one end of the mounting shaft connected to the first worm gear, a second worm gear is installed on the movable end of the drive motor, a circular ring is slidably mounted on the fixed rod, and a support rod is also provided. The present invention can improve the limiting accuracy of the transmission belt on the film tube, avoid the friction between the transmission belt and the film tube, and protect the film tube from damage.

Description

Technical Field

[0001] The invention relates to the technical field of new materials, in particular to a blow molding process for protective films. Background Art

[0002] The production of film generally adopts blow molding by flat extrusion and blowing method. In this molding process, the raw materials are first melted and plasticized in the extruder, and then the molten raw materials are extruded through the head of the blow molding machine to form a thin-walled tube. Then, compressed air is sprayed through the mandrel of the head to inflate the thin-walled tube to form a film tube. The film tube is then cooled by air. The cooled film tube is clamped flat by a herringbone plate to form a fitted film. Finally, the film is pulled to the wind-up roller by a traction roller for winding to form a film product.

[0003] During the forming process of the film tube, it is formed from a thin-walled tube to a film tube and finally pulled by a traction roller. During the whole process, the upper part of the film tube is subjected to the upward traction force of the traction roller. As the film tube moves, in order to prevent the position of the film tube from shifting, baffles are usually provided on both sides of the film tube or retaining rings are sleeved on the surface of the film tube to increase the stability of the film tube during displacement. In the prior art, the baffles or retaining rings are in static contact with the film tube, which increases the friction when the surface of the baffles or retaining rings contacts the surface of the film tube, and is easy to cause damage to the surface of the film tube. Summary of the invention

[0004] The purpose of the present invention is to provide a blow molding process for a protective film, which can improve the limiting accuracy of a transmission belt on a film tube, avoid friction between the transmission belt and the film tube, and protect the film tube from damage.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a blow molding process for a protective film, based on a processing device, the processing device includes a support base and a blow molding head installed on the support base, a traction frame is arranged above the support base, two oppositely arranged fixed plates are installed on the traction frame, a second electric cylinder is installed on the outer surface of one of the fixed plates opposite to the other fixed plate, and the movable end of the second electric cylinder passes through the corresponding fixed plate and is connected to the second mounting plate located on the inner side of the fixed plate;

[0006] The second mounting plate is provided with two long strips disposed face to face on the surface opposite to the fixed plate, two mounting shafts are rotatably connected between the two long strips, the two mounting shafts disposed in parallel and spaced apart are connected by a transmission belt, a first worm gear is connected to one of the two mounting shafts, and a driving mechanism is drivingly connected to the first worm gear;

[0007] A long strip block is installed on the second mounting plate, one end of the long strip block is connected to the second mounting plate, the other end of the long strip block extends away from the outer side of the other second mounting plate, the long strip block is provided with a long strip hole arranged along the moving direction of the movable end of the second electric cylinder, the lower end of a fixed block is installed on the top of the fixed plate, and the upper end of the fixed block can be movably embedded in the long strip hole;

[0008] A mounting rod is connected to one end of the mounting shaft connected to the first worm gear, a pipe fitting is movably sleeved on one end of the mounting rod away from the mounting shaft, a plurality of screw holes are provided on the outer surface of the mounting rod, a stud for threaded connection with the screw hole is penetrated and installed at one end of the pipe fitting close to the mounting shaft, and the first worm gear is fixedly sleeved on one end of the pipe fitting away from the mounting shaft;

[0009] The driving mechanism comprises a support plate arranged below the two first worm gears and a driving motor installed on the upper surface of the support plate, a second worm gear is installed on the movable end of the driving motor, a first mounting plate is respectively arranged on both sides of the driving motor, a worm is rotatably connected between the two first mounting plates, the middle part of the worm is meshed with the second worm gear, and the threads at both ends of the worm are in opposite rotation directions and are respectively meshed with the two first worm gears;

[0010] A bottom plate is provided below the support plate, the bottom plate is located outside the support base and is mounted on the traction frame, a first electric cylinder is mounted on the upper surface of the bottom plate, the movable end of the first electric cylinder is connected to the lower surface of the support plate, and is used to drive the support plate to move up and down;

[0011] A fixing rod is installed on the upper surface of the bottom plate and on both sides of the support plate, and a circular ring is slidably mounted on the fixing rod. The outer end surface of the circular ring is connected to the support plate, and a first baffle is arranged on the upper end of the fixing rod;

[0012] It also has a support rod, the lower end of which is connected to the bottom plate, the upper end of which extends upward to the top of the support plate, the upper end of which is provided with a mounting block, the top of which is provided with a travel switch, the trigger end of which contacts the top of the support plate and is electrically connected to the PLC controller through a wire;

[0013] The processing method comprises the following steps:

[0014] Step 1: Control the active end of the first electric cylinder to retract through the PLC controller, drive the support plate to move downward, and make the worm move downward and separate from the first worm gear;

[0015] Step 2, controlling the two second electric cylinders to extend forward through the PLC controller, so that the two transmission belts are in contact with the blow-molded film tube;

[0016] Step 3, remove the stud from the screw hole, and adjust the distance between the pipe fitting and the mounting rod so that the first worm gear can mesh with the worm of the driving mechanism;

[0017] Step 4: Insert the stud into the screw hole to securely connect the pipe fitting to the mounting rod;

[0018] Step 5: Control the active end of the first electric cylinder to extend through the PLC controller, drive the support plate to move upward, and make the worm move downward to mesh with the first worm gear;

[0019] Step 6: Control the driving motor through the PLC controller to drive the second worm gear to rotate. The second worm gear drives the two first worm gears to rotate through the worm gear meshing with it. The two first worm gears drive the transmission belt through the mounting shaft to rotate in the same direction and speed as the film tube.

[0020] The further improved scheme in the above technical scheme is as follows:

[0021] 1. In the above solution, the PLC controller is electrically connected to the second electric cylinder through a wire.

[0022] 2. In the above solution, the PLC controller is installed on the traction frame.

[0023] 3. In the above solution, both ends of the mounting shaft are connected to the two long strips via a second bearing.

[0024] 4. In the above solution, the second bearing is installed through the long plate, and the installation shaft is tightly inserted into the inner ring of the second bearing.

[0025] 5. In the above solution, a second baffle is installed on the side surface of one end of the fixing block extending from the elongated hole, and the bottom surface of the second baffle is in sliding contact with the top surface of the elongated block.

[0026] 6. In the above scheme, the five screw holes are arranged at equal intervals.

[0027] 7. In the above solution, both ends of the worm are connected to the first mounting plate through a first bearing respectively.

[0028] 8. In the above solution, the first electric cylinder is connected to the PLC controller via a wire.

[0029] 9. In the above solution, the first baffle is a circular baffle.

[0030] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0031] 1. The present invention is used in the blow molding process of the protective film, which realizes stable and low-friction limiting of the film tube during the traction process, which can not only avoid the quality of the finished product in the subsequent steps due to the deviation of the film tube during the traction process, but also greatly reduce the wear of the film tube, and further improve the product quality; further, it can also adjust the relative position between the transmission belt and the film tube according to the size of the film tube, so as to adapt to film tubes of different sizes and improve the efficiency of production and processing.

[0032] 2. The present invention is used in a blow molding process for a protective film, wherein a long strip block is installed on the second mounting plate, one end of the long strip block is connected to the second mounting plate, and the other end of the long strip block extends to the outside away from the other second mounting plate. The long strip block is provided with a long strip hole arranged along the movement direction of the movable end of the second electric cylinder, and the lower end of a fixed block is installed on the top of the fixed plate, and the upper end of the fixed block can be movably embedded in the long strip hole. Through the coordinated arrangement of the long strip block and the fixed block, the straightness and stability of the second mounting plate during the movement are improved, and the limiting accuracy of the transmission belt on the film tube is further improved, so as to avoid the friction between the transmission belt and the film tube and protect the film tube from damage.

[0033] 3. The present invention is used in the blow molding process of protective film. A mounting rod is connected to one end of the mounting shaft connected to the first worm gear. A pipe fitting can be movably mounted on the end of the mounting rod away from the mounting shaft. A plurality of screw holes are provided on the outer surface of the mounting rod. A stud for threaded connection with the screw hole is penetrated and installed at the end of the pipe fitting close to the mounting shaft. The first worm gear is fixedly mounted on the end of the pipe fitting away from the mounting shaft, which is convenient for quickly adjusting the distance between the mounting shaft and the worm gear, thereby ensuring the progress and stability of the installation of the first worm gear, thereby improving the stability and consistency of the effect on the film tube.

[0034] 4. The present invention is used for the blow molding process of protective film, and a base plate is arranged under the support plate, the base plate is located outside the support base and is installed on the traction frame, a first electric cylinder is installed on the upper surface of the base plate, the movable end of the first electric cylinder is connected to the lower surface of the support plate, and is used to drive the support plate to move up and down, so that the worm can be separated from the first worm wheel, so as to facilitate the adjustment of the position of the transmission belt in the horizontal direction to achieve more accurate positioning of the film tube; further, a fixing rod is installed on the upper surface of the base plate and located on both sides of the support plate, a circular ring member is slidably mounted on the fixing rod, and the outer end surface of the circular ring member is connected to the support plate, and the deviation of the support plate in the horizontal direction is further avoided by the cooperation of the circular ring member and the fixing rod, so as to improve the accuracy and stability of the movement of the support plate in the vertical direction; and a first baffle is arranged on the upper end of the fixing rod, which can prevent the circular ring member from detaching from the fixing rod, so as to further improve the stability of the support plate during the sliding process on the fixing rod.

[0035] 5. The present invention is used in the blow molding process of the protective film, and a travel switch is installed on the top of the mounting block. The trigger end of the travel switch contacts the top of the support plate and is electrically connected to the PLC controller through a wire. When the worm and the worm wheel are in contact, the trigger end of the travel switch contacts the top of the support plate, and the travel switch transmits a signal to the PLC controller, and the PLC controller controls the first electric cylinder to stop working, thereby facilitating the operation of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Attached Figure 1 The structure of the processing device of the present invention is shown in FIG. Figure 1 ;

[0037] Attached Figure 2 A partial schematic diagram of the processing device of the present invention Figure 1 ;

[0038] Attached Figure 3 A partial schematic diagram of the processing device of the present invention Figure 2 ;

[0039] Attached Figure 4 It is a schematic diagram of the structure of the travel switch, support rod and mounting block of the processing device of the present invention.

[0040] In the above drawings: 1, long strip; 2, mounting rod; 3, first worm gear; 4, first bearing; 5, worm; 6, first baffle; 7, first mounting plate; 8, circular ring; 9, fixing rod; 10, bottom plate; 11, driving motor; 12, first electric cylinder; 13, support rod; 14, mounting block; 15, support plate; 16, PLC controller; 17, second electric cylinder; 18, long strip; 19, fixing plate; 20, traction frame; 21, support base; 22, blow molding head; 23, fixing block; 24, second mounting plate; 25, transmission belt; 26, second baffle; 27, long strip hole; 28, travel switch; 29, mounting shaft; 30, screw hole; 31, pipe fitting; 32, stud; 33, second bearing; 34, second worm gear. DETAILED DESCRIPTION

[0041] In the description of this patent, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0042] Embodiment 1: A blow molding process for a protective film, based on a processing device, the processing device includes a support base 21 and a blow molding head 22 mounted on the support base 21, a traction frame 20 is arranged above the support base 21, two oppositely arranged fixed plates 19 are installed on the traction frame 20, a second electric cylinder 17 is installed on the outer surface of one of the fixed plates 19 opposite to the other fixed plate 19, and the movable end of the second electric cylinder 17 passes through the corresponding fixed plate 19 and is connected to the second mounting plate 24 located on the inner side of the fixed plate 19;

[0043] The second mounting plate 24 is provided with two long strips 1 disposed face to face on the surface opposite to the fixed plate 19, two mounting shafts 29 are rotatably connected between the two long strips 1, and the two mounting shafts 29 disposed in parallel with each other are connected by a transmission belt 25, one of the two mounting shafts 29 is connected to a first worm gear 3, and a driving mechanism is drivingly connected to the first worm gear 3;

[0044] The PLC controller 16 controls the second electric cylinder 17 to extend and retract, pushing the second mounting plate 24 to move in the horizontal direction, and the second mounting plate 24 pushes the two long plates 1 to move synchronously, and the two long plates 1 push the two mounting shafts 29 to move synchronously, thereby facilitating the two mounting shafts 29 to push the transmission belt 25 to move synchronously in the horizontal position, making it convenient for the side of the transmission belt 25 to contact the side of the film tube, and the second electric cylinder 17 can adjust the distance between the two transmission belts 25 according to the size of the film tube, which is convenient for operation;

[0045] A strip block 18 is mounted on the second mounting plate 24, one end of the strip block 18 is connected to the second mounting plate 24, the other end of the strip block 18 extends away from the outer side of the other second mounting plate 24, the strip block 18 is provided with a strip hole 27 arranged along the moving direction of the movable end of the second electric cylinder 17, the lower end of a fixed block 23 is mounted on the top of the fixed plate 19, and the upper end of the fixed block 23 can be movably embedded in the strip hole 27;

[0046] When the PLC controller 16 controls the second electric cylinder 17 to work, the second electric cylinder 17 pushes the second mounting plate 24 to move in the horizontal direction, and the second mounting plate 24 pulls the long block 18 to move synchronously, and the long block 18 slides on the surfaces of the fixed block 23 and the second baffle 26, thereby improving the stability of the second mounting plate 24 during the sliding process in the horizontal position;

[0047] A mounting rod 2 is connected to one end of the mounting shaft 29 connected to the first worm gear 3, and a pipe fitting 31 is movably sleeved on the end of the mounting rod 2 away from the mounting shaft 29. A plurality of screw holes 30 are provided on the outer surface of the mounting rod 2. A stud 32 for threaded connection with the screw hole 30 is installed through the end of the pipe fitting 31 close to the mounting shaft 29. The first worm gear 3 is fixedly sleeved on the end of the pipe fitting 31 away from the mounting shaft 29.

[0048] In the process of adjusting the distance between the installation shaft 29 and the worm 5, the stud 32 is first taken out from the screw hole 30, and the length between the pipe fitting 31 and the installation rod 2 is adjusted so that one end of the first worm gear 3 is meshed with the worm of the driving mechanism, and then the stud 32 is re-inserted into the pipe fitting 31 and one end of the stud 32 is threadedly installed in the screw hole 30, so that the pipe fitting 31 and the installation rod 2 are connected, thereby improving the stability of the position of the first worm gear 3;

[0049] The driving mechanism comprises a support plate 15 disposed below the two first worm gears 3 and a driving motor 11 mounted on the upper surface of the support plate 15, a second worm gear 34 is mounted on the movable end of the driving motor 11, a first mounting plate 7 is disposed on both sides of the driving motor 11, a worm 5 is rotatably connected between the two first mounting plates 7, the middle portion of the worm 5 is meshed with the second worm gear 34, and the threads at both ends of the worm 5 are in opposite rotation directions and are meshed with the two first worm gears 3 respectively;

[0050] In order to facilitate driving the two transmission belts 25 to rotate in the same direction as the film tube, during operation, the driving motor 11 is first connected to the external power supply through a wire, and the driving motor 11 is controlled by the PLC controller 16 to work after being powered on. The driving motor 11 drives the second worm gear 34 to rotate synchronously, and the second worm gear 34 drives the worm 5 to rotate. The worm 5 with different rotation directions at both ends drives the two first worm gears 3 to rotate synchronously, and the two first worm gears 3 drive the two installation shafts 29 to rotate synchronously. There is friction between the two installation shafts 29 and the two transmission belts 25, so that the installation shafts 29 drive the transmission belts 25 to rotate synchronously. Since the two transmission belts 25 rotate in the same direction as the film tube, the rotation of the driving motor 11 is controlled by the PLC controller 16 to control the rotation speed of the transmission belt 25 to be the same as the speed of the film tube movement, thereby reducing the friction between the transmission belt 25 and the film tube.

[0051] A bottom plate 10 is disposed below the support plate 15. The bottom plate 10 is located outside the support base 21 and is mounted on the traction frame 20. A first electric cylinder 12 is mounted on the upper surface of the bottom plate 10. The movable end of the first electric cylinder 12 is connected to the lower surface of the support plate 15 to drive the support plate 15 to move up and down.

[0052] During the adjustment process of the two transmission belts 25 being in the horizontal position, the first electric cylinder 12 is first controlled by the PLC controller 16 to be powered on, and the movable end of the first electric cylinder 12 is contracted, driving the support plate 15 to move downward. During the downward movement of the worm 5, the worm 5 is separated from the first worm wheel 3, which facilitates the movement of the transmission belt 25 in the horizontal position and improves the convenience of operation.

[0053] A fixing rod 9 is installed on the upper surface of the bottom plate 10 and on both sides of the support plate 15. A circular ring 8 is slidably mounted on the fixing rod 9. The outer end surface of the circular ring 8 is connected to the support plate 15. A first baffle 6 is provided at the upper end of the fixing rod 9.

[0054] It also has a support rod 13, the lower end of the support rod 13 is connected to the bottom plate 10, the upper end of the support rod 13 extends upward to the top of the support plate 15, the upper end of the support rod 13 is provided with a mounting block 14, the top of the mounting block 14 is installed with a travel switch 28, the trigger end of the travel switch 28 is in contact with the top of the support plate 15 and is electrically connected to the PLC controller 16 through a wire;

[0055] The trigger end of the travel switch 28 contacts the top of the support plate 15, and the travel switch 28 transmits a signal to the PLC controller 16, and the PLC controller 16 controls the first electric cylinder 12 to stop working, thereby facilitating the operation of the staff;

[0056] The processing method comprises the following steps:

[0057] Step 1: Control the active end of the first electric cylinder 12 to retract through the PLC controller 16, so as to drive the support plate 15 to move downward, so that the worm 5 moves downward and separates from the first worm gear 3;

[0058] Step 2, the two second electric cylinders 17 are controlled by the PLC controller 16 to extend forward, so that the two transmission belts 25 are in contact with the blow-molded film tube;

[0059] Step 3, remove the stud 32 from the screw hole 30, and adjust the distance between the pipe 31 and the mounting rod 2 so that the first worm gear 3 can mesh with the worm 5 of the driving mechanism;

[0060] Step 4: insert the stud 32 into the screw hole 30 to fix the pipe 31 to the mounting rod 2;

[0061] Step 5: Control the active end of the first electric cylinder 12 to extend through the PLC controller 16, driving the support plate 15 to move upward, so that the worm 5 moves downward and meshes with the first worm gear 3;

[0062] Step 6, control the driving motor 11 through the PLC controller 16 to drive the second worm gear 34 to rotate, the second worm gear 34 drives the two first worm gears 3 to rotate through the worm 5 meshing therewith, and the two first worm gears 3 drive the transmission belt 25 through the mounting shaft 29 to rotate in the same direction and speed as the film tube.

[0063] The PLC controller 16 is electrically connected to the second electric cylinder 17 through a wire; the PLC controller 16 is installed on the traction frame 20;

[0064] Both ends of the installation shaft 29 are connected to the two long boards 1 via a second bearing 33 ; the second bearing 33 is installed through the long boards 1 , and the installation shaft 29 is tightly inserted into the inner ring of the second bearing 33 .

[0065] Embodiment 2: A blow molding process for a protective film, based on a processing device, the processing device includes a support base 21 and a blow molding head 22 mounted on the support base 21, a traction frame 20 is arranged above the support base 21, two oppositely arranged fixed plates 19 are installed on the traction frame 20, a second electric cylinder 17 is installed on the outer surface of one of the fixed plates 19 opposite to the other fixed plate 19, and the movable end of the second electric cylinder 17 passes through the corresponding fixed plate 19 and is connected to the second mounting plate 24 located on the inner side of the fixed plate 19;

[0066] The second mounting plate 24 is provided with two long strips 1 disposed face to face on the surface opposite to the fixed plate 19, two mounting shafts 29 are rotatably connected between the two long strips 1, and the two mounting shafts 29 disposed in parallel with each other are connected by a transmission belt 25, one of the two mounting shafts 29 is connected to a first worm gear 3, and a driving mechanism is drivingly connected to the first worm gear 3;

[0067] A strip block 18 is mounted on the second mounting plate 24, one end of the strip block 18 is connected to the second mounting plate 24, the other end of the strip block 18 extends away from the outer side of the other second mounting plate 24, the strip block 18 is provided with a strip hole 27 arranged along the moving direction of the movable end of the second electric cylinder 17, the lower end of a fixed block 23 is mounted on the top of the fixed plate 19, and the upper end of the fixed block 23 can be movably embedded in the strip hole 27;

[0068] A mounting rod 2 is connected to one end of the mounting shaft 29 connected to the first worm gear 3, and a pipe fitting 31 is movably sleeved on the end of the mounting rod 2 away from the mounting shaft 29. A plurality of screw holes 30 are provided on the outer surface of the mounting rod 2. A stud 32 for threaded connection with the screw hole 30 is installed through the end of the pipe fitting 31 close to the mounting shaft 29. The first worm gear 3 is fixedly sleeved on the end of the pipe fitting 31 away from the mounting shaft 29.

[0069] The driving mechanism comprises a support plate 15 disposed below the two first worm gears 3 and a driving motor 11 mounted on the upper surface of the support plate 15, a second worm gear 34 is mounted on the movable end of the driving motor 11, a first mounting plate 7 is disposed on both sides of the driving motor 11, a worm 5 is rotatably connected between the two first mounting plates 7, the middle portion of the worm 5 is meshed with the second worm gear 34, and the threads at both ends of the worm 5 are in opposite rotation directions and are meshed with the two first worm gears 3 respectively;

[0070] A bottom plate 10 is disposed below the support plate 15. The bottom plate 10 is located outside the support base 21 and is mounted on the traction frame 20. A first electric cylinder 12 is mounted on the upper surface of the bottom plate 10. The movable end of the first electric cylinder 12 is connected to the lower surface of the support plate 15 to drive the support plate 15 to move up and down.

[0071] A fixing rod 9 is installed on the upper surface of the bottom plate 10 and on both sides of the support plate 15. A circular ring 8 is slidably mounted on the fixing rod 9. The outer end surface of the circular ring 8 is connected to the support plate 15. A first baffle 6 is provided at the upper end of the fixing rod 9.

[0072] It also has a support rod 13, the lower end of the support rod 13 is connected to the bottom plate 10, the upper end of the support rod 13 extends upward to the top of the support plate 15, the upper end of the support rod 13 is provided with a mounting block 14, the top of the mounting block 14 is installed with a travel switch 28, the trigger end of the travel switch 28 is in contact with the top of the support plate 15 and is electrically connected to the PLC controller 16 through a wire;

[0073] The processing method comprises the following steps:

[0074] Step 1: Control the active end of the first electric cylinder 12 to retract through the PLC controller 16, so as to drive the support plate 15 to move downward, so that the worm 5 moves downward and separates from the first worm gear 3;

[0075] Step 2, the two second electric cylinders 17 are controlled by the PLC controller 16 to extend forward, so that the two transmission belts 25 are in contact with the blow-molded film tube;

[0076] Step 3, remove the stud 32 from the screw hole 30, and adjust the distance between the pipe 31 and the mounting rod 2 so that the first worm gear 3 can mesh with the worm 5 of the driving mechanism;

[0077] Step 4: insert the stud 32 into the screw hole 30 to fix the pipe 31 to the mounting rod 2;

[0078] Step 5: Control the active end of the first electric cylinder 12 to extend through the PLC controller 16, driving the support plate 15 to move upward, so that the worm 5 moves downward and meshes with the first worm gear 3;

[0079] Step 6, control the driving motor 11 through the PLC controller 16 to drive the second worm gear 34 to rotate, the second worm gear 34 drives the two first worm gears 3 to rotate through the worm 5 meshing therewith, and the two first worm gears 3 drive the transmission belt 25 through the mounting shaft 29 to rotate in the same direction and speed as the film tube.

[0080] A second baffle plate 26 is installed on the side surface of one end of the fixing block 23 extending from the elongated hole 27, and the bottom surface of the second baffle plate 26 is in sliding contact with the top surface of the elongated block 18;

[0081] The five screw holes 30 are arranged at equal intervals; both ends of the worm 5 are connected to the first mounting plate 7 through a first bearing 4 respectively;

[0082] The first electric cylinder 12 is connected to the PLC controller 16 via a wire; the first baffle 6 is a circular baffle.

[0083] When the above-mentioned blow molding process for the protective film is adopted, it realizes stable and low-friction limiting of the film tube during the traction process, which can not only avoid the quality of the finished product in the subsequent steps being affected by the deviation of the film tube during the traction process, but also greatly reduce the wear of the film tube, further improving the product quality; further, it can also adjust the relative position between the transmission belt and the film tube according to the size of the film tube, so as to be suitable for film tubes of different sizes and improve the efficiency of production and processing;

[0084] In addition, the cooperation between the long strip block and the fixed block improves the straightness and stability of the second mounting plate during movement, further improves the limiting accuracy of the transmission belt on the film tube, avoids friction between the transmission belt and the film tube, and protects the film tube from damage;

[0085] It is also convenient to quickly adjust the distance between the installation shaft and the worm, ensuring the progress and stability of the installation of the first worm gear, thereby improving the stability and consistency of the effect on the film tube;

[0086] In addition, it can separate the worm from the first worm wheel, making it easier to adjust the position of the transmission belt in the horizontal direction to achieve more accurate positioning of the film tube;

[0087] Furthermore, by cooperating with the circular ring and the fixing rod, the deviation of the support plate in the horizontal direction is further avoided, and the precision and stability of the movement of the support plate in the vertical direction are improved; the circular ring can also be prevented from detaching from the fixing rod, and the stability of the support plate in the process of sliding on the fixing rod is further improved;

[0088] In addition, when the worm and the worm wheel are in contact, the trigger end of the travel switch is in contact with the top of the support plate, and the travel switch transmits a signal to the PLC controller, and the PLC controller controls the first electric cylinder to stop working, thereby facilitating the operation of the staff.

[0089] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A blow molding process for a protective film, based on a processing device, the processing device comprising a support base (21) and a blow molding head (22) mounted on the support base (21), characterized in that: A traction frame (20) is arranged above the support base (21), and two fixed plates (19) arranged opposite to each other are mounted on the traction frame (20); a second electric cylinder (17) is mounted on the outer surface of one of the fixed plates (19) opposite to the other fixed plate (19), and a movable end of the second electric cylinder (17) passes through the corresponding fixed plate (19) and is connected to a second mounting plate (24) located on the inner side of the fixed plate (19); The second mounting plate (24) is provided with two long strips (1) arranged face to face on a surface opposite to the fixed plate (19); two mounting shafts (29) are rotatably connected between the two long strips (1); the two mounting shafts (29) are spaced apart and arranged in parallel and connected via a transmission belt (25); a first worm gear (3) is connected to one of the two mounting shafts (29); and a driving mechanism is drivingly connected to the first worm gear (3); A long strip block (18) is mounted on the second mounting plate (24), one end of the long strip block (18) is connected to the second mounting plate (24), the other end of the long strip block (18) extends away from the outer side of the other second mounting plate (24), the long strip block (18) is provided with a long strip hole (27) arranged along the movement direction of the movable end of the second electric cylinder (17), the lower end of a fixed block (23) is mounted on the top of the fixed plate (19), and the upper end of the fixed block (23) can be movably embedded in the long strip hole (27); A mounting rod (2) is connected to one end of the mounting shaft (29) connected to the first worm gear (3); a pipe fitting (31) is movably mounted on an end of the mounting rod (2) away from the mounting shaft (29); a plurality of screw holes (30) are provided on an outer surface of the mounting rod (2); a stud (32) for threaded connection with the screw hole (30) is penetrated and installed at one end of the pipe fitting (31) close to the mounting shaft (29); and the first worm gear (3) is fixedly mounted on an end of the pipe fitting (31) away from the mounting shaft (29); The driving mechanism comprises a support plate (15) arranged below the two first worm gears (3) and a driving motor (11) mounted on the upper surface of the support plate (15); a second worm gear (34) is mounted on the movable end of the driving motor (11); a first mounting plate (7) is respectively arranged on both sides of the driving motor (11); a worm (5) is rotatably connected between the two first mounting plates (7); a middle portion of the worm (5) is meshedly connected to the second worm gear (34); and two ends of the worm (5) have threads with opposite rotation directions and are respectively meshedly connected to the two first worm gears (3); A bottom plate (10) is provided below the support plate (15), the bottom plate (10) is located outside the support base (21) and is mounted on the traction frame (20), a first electric cylinder (12) is mounted on the upper surface of the bottom plate (10), the movable end of the first electric cylinder (12) is connected to the lower surface of the support plate (15), and is used to drive the support plate (15) to move up and down; A fixing rod (9) is installed on the upper surface of the bottom plate (10) and on both sides of the support plate (15), a circular ring member (8) is slidably mounted on the fixing rod (9), the outer end surface of the circular ring member (8) is connected to the support plate (15), and a first baffle (6) is provided at the upper end of the fixing rod (9); It also comprises a support rod (13), the lower end of the support rod (13) being connected to the bottom plate (10), the upper end of the support rod (13) extending upward to above the support plate (15), the upper end of the support rod (13) being provided with a mounting block (14), the top of the mounting block (14) being provided with a travel switch (28), the trigger end of the travel switch (28) being in contact with the top of the support plate (15) and being electrically connected to the PLC controller (16) via a wire; The processing method comprises the following steps: Step 1: Control the active end of the first electric cylinder (12) to retract through the PLC controller (16), thereby driving the support plate (15) to move downward, so that the worm (5) moves downward and separates from the first worm wheel (3); Step 2: Control the two second electric cylinders (17) to extend forward through the PLC controller (16), so that the two transmission belts (25) are in contact with the blow-molded film tube; Step 3, remove the stud (32) from the screw hole (30), and adjust the distance between the pipe (31) and the mounting rod (2) so that the first worm gear (3) can mesh with the worm (5) of the driving mechanism; Step 4: insert the stud (32) into the screw hole (30) to securely connect the pipe fitting (31) to the mounting rod (2); Step 5: Control the active end of the first electric cylinder (12) to extend through the PLC controller (16), thereby driving the support plate (15) to move upward, so that the worm (5) moves downward and meshes with the first worm wheel (3); Step 6: Control the driving motor (11) through the PLC controller (16) to drive the second worm gear (34) to rotate; the second worm gear (34) drives the two first worm gears (3) to rotate through the worm (5) meshing therewith; the two first worm gears (3) drive the transmission belt (25) through the mounting shaft (29) to rotate in the same direction and at the same speed as the film tube.

2. The blow molding process for protective film according to claim 1, characterized in that: The PLC controller (16) is electrically connected to the second electric cylinder (17) via a wire.

3. The blow molding process for protective film according to claim 2, characterized in that: The PLC controller (16) is installed on the traction frame (20).

4. The blow molding process for protective film according to claim 1, characterized in that: Both ends of the installation shaft (29) are connected to the two long strips (1) via a second bearing (33).

5. The blow molding process for protective film according to claim 4, characterized in that: The second bearing (33) is installed through the long plate (1), and the installation shaft (29) is tightly inserted into the inner ring of the second bearing (33).

6. The blow molding process for protective film according to claim 1, characterized in that: A second baffle (26) is mounted on the side surface of one end of the fixed block (23) extending from the elongated hole (27), and the bottom surface of the second baffle (26) is in sliding contact with the top surface of the elongated block (18).

7. The blow molding process for protective film according to claim 1, characterized in that: The five screw holes (30) are arranged at equal intervals.

8. The blow molding process for protective film according to claim 1, characterized in that: Both ends of the worm (5) are connected to a first mounting plate (7) via a first bearing (4) respectively.

9. The blow molding process for protective film according to claim 1, characterized in that: The first electric cylinder (12) is connected to a PLC controller (16) via a wire.

10. The blow molding process for protective film according to claim 1, characterized in that: The first baffle (6) is a circular baffle.

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