A film blowing device for plastic film production and processing

Abstract

The application discloses a film blowing device for plastic film production and processing and belongs to the field of plastic film production.The technical key points of the film blowing device include a base, four first vertical rods which are symmetrically arranged in pairs and are fixedly connected to the top of the base, a square ring plate which is fixedly connected to the top of the four first vertical rods, and a film blowing die head which is fixedly connected to the top of the base and is located in the middle of the first vertical rods.The film protection mechanism provided with the linkage type L-shaped plate and the protection roller can realize the full circumferential protection of the blow molding film, effectively avoids the damage and wrinkles of the film caused by scratching and air flow disturbance, and simultaneously matches the first cooling mechanism with the upper and lower double-layer annular air outlets and the second cooling mechanism with the double-side air outlets to form a multi-stage cooling system, so that the film can be uniformly and quickly cooled and shaped, the appearance and size precision of the film after forming are greatly improved, and the quality of the finished product is ensured.

Description

Technical Field

[0001] This invention relates to the field of plastic film production, specifically a blown film device for plastic film production and processing. Background Technology

[0002] Plastic film, as a commonly used basic material in packaging, building materials, electronics, and other fields, directly affects product quality and production efficiency through the degree of automation and precision in its production and processing. Blown film forming is one of the mainstream processes in plastic film processing, and the corresponding blown film equipment has become a core piece of equipment on film production lines. Currently, blown film equipment on the market generally includes basic components such as a blown film die, cooling structure, flattening mechanism, and winding mechanism. It can complete the basic processes from plastic melt extrusion and blown film forming to film winding, meeting the production needs of conventional films and is widely used in the plastics processing industry.

[0003] However, in practical applications, existing blown film equipment lacks a full-circumferential protective structure after the film is blown into shape, making it prone to damage and wrinkles due to external force scraping and airflow disturbance. Moreover, the cooling structure is mostly single-sided or single-stage air outlet, and uneven cooling can easily lead to thickness deviation and warping of the film after shaping, affecting the quality of the finished product. Secondly, the flattening and tensioning mechanisms of the equipment have poor adjustment flexibility and are difficult to adapt to the production needs of films of different specifications and thicknesses. Some mechanisms adopt rigid transmission and extrusion design, which can easily cause film stretching deformation. At the same time, the process connection between various mechanisms is not good, and the film is prone to deviation and tension imbalance during the film transportation process, thereby reducing the overall production efficiency and finished product qualification rate. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a blown film device for plastic film production and processing, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A blown film production and processing device for plastic film includes a base. Four first uprights, symmetrically arranged in pairs, are fixedly connected to the top of the base. A square ring plate is fixedly connected to the top of the four first uprights. A blown film die head located in the middle of the first uprights is fixedly connected to the top of the base. A blown film machine body located to the right of the blown film die head is fixedly connected to the top of the base. The blown film machine body is connected to the blown film die head. An installation platform located above the blown film die head is fixedly connected to the four first uprights. A clearance channel adapted to the blown film die head is opened in the middle of the installation platform. A film protection mechanism is installed on the top of the installation platform. A first cooling mechanism is provided inside the film protection mechanism. A guide flattening mechanism located above the film protection mechanism is provided on the four first uprights. An elastic extrusion assembly is provided inside the square ring plate. An elastic tensioning mechanism is provided at the left edge of the top of the square ring plate. A second cooling mechanism is connected to the left side of the square ring plate and the installation platform. A winding section located to the left of the blown film die head is also provided on the top of the base.

[0007] Preferably, the protective film mechanism includes a first fixing ring fixedly connected to the top of the installation platform. A plurality of second uprights arranged in a circular array are fixedly connected to the top of the first fixing ring. The top of each second upright is fixedly connected to a second fixing ring. An L-shaped plate is rotatably connected to each second upright. The side of the L-shaped plate with the horizontal plate is arranged radially outward from the first fixing ring, and a first mounting groove is opened on the horizontal plate. A linkage rod is rotatably connected between the first mounting grooves of two adjacent L-shaped plates. A plurality of first C-shaped frames are fixedly connected to the side of the L-shaped plate away from its horizontal plate, which is equidistantly distributed from top to bottom. A protective roller is rotatably connected inside the first C-shaped frame. A driving unit is provided between the second fixing ring and one of the L-shaped plates. The plurality of first C-shaped frames on two adjacent L-shaped plates are staggered vertically.

[0008] Preferably, the drive unit includes a second mounting groove opened on the outside of the second fixed ring, and a first cylinder is rotatably connected inside the second mounting groove via a rotating shaft. An extension plate is integrally formed on the outer side of the top of one of the L-shaped plates, and a connecting block is rotatably connected to the top of the outer end of the extension plate. The output end of the first cylinder is fixedly connected to one side of the connecting block.

[0009] Preferably, the first cooling mechanism includes an annular groove formed at the bottom of the first fixing ring, a first annular air duct fixedly connected in the annular groove, a first air cooler fixedly connected to the top of the mounting platform, a first connecting pipe connecting the output end of the first air cooler to the first annular air duct, a plurality of first air outlet nozzles evenly distributed in the inner ring of the first annular air duct, a second air cooler fixedly connected to the top of the mounting platform, a second annular air duct fixedly connected to the top of the second fixing ring, a second connecting pipe connecting the output end of the second air cooler to the second annular air duct, and a plurality of second air outlet nozzles evenly distributed in the inner ring of the second annular air duct.

[0010] Preferably, the guiding flattening mechanism includes two second C-shaped frames arranged symmetrically from left to right. Both second C-shaped frames are inclined, with their top ends close to each other and their bottom ends far apart. The bottom ends of both second C-shaped frames are hinged between two first uprights on the same side. Several guide rollers are rotatably connected inside the second C-shaped frames. The front and rear edges of the square ring plate are provided with a spacing adjustment mechanism connected to the two second C-shaped frames.

[0011] Preferably, the spacing adjustment mechanism includes a second cylinder fixedly connected to a square ring plate. A drive plate is fixedly connected to the bottom output end of the second cylinder. A first guide rod symmetrically distributed on the left and right sides of the second cylinder is fixedly connected to the top of the drive plate. Both first guide rods are slidably connected to the square ring plate. A first reinforcing plate is fixedly connected to the top of both first guide rods. Sliding rods are fixedly connected to the front and rear sides of the top of the two second C-shaped frames. A matching through groove adapted to the sliding rod is horizontally opened on the drive plate. A limit plate is fixedly connected to the end of the sliding rod away from the second C-shaped frame. The sliding rods on the same side of the two second C-shaped frames are slidably disposed in the matching through groove of the spacing adjustment mechanism on the same side.

[0012] Preferably, the elastic extrusion assembly includes mounting seats fixedly connected to the front and rear sides of the inner wall of the square ring plate. A first guide roller located on the left side is rotatably connected between the two mounting seats. A third mounting groove is provided on the opposite side of each of the two mounting seats. Two parallel crossbars are fixedly connected in the third mounting groove. A third C-shaped frame is slidably connected to the four crossbars. A first spring is sleeved on each crossbar. One end of the first spring is fixedly connected to the third C-shaped frame, and the other end of the first spring is fixedly connected to the inner wall of the third mounting groove. An extrusion roller is rotatably connected in the third C-shaped frame.

[0013] Preferably, the elastic tensioning mechanism includes a third cylinder fixedly connected to the left edge of the square ring plate. A mounting plate is fixedly connected to the top output end of the third cylinder. A second guide rod symmetrically distributed on both sides of the third cylinder is fixedly connected to the bottom of the mounting plate. Both second guide rods are slidably connected to the square ring plate. A second reinforcing plate is fixedly connected to the bottom ends of the two second guide rods. Two telescopic rods symmetrically distributed are fixedly connected to the top of the mounting plate. A V-shaped frame is fixedly connected to the top ends of the two telescopic rods. A second spring sleeved on the outside of the telescopic rods is fixedly connected between the V-shaped frame and the mounting plate. Two tensioning rollers spaced apart on the left and right are rotatably connected inside the V-shaped frame.

[0014] Preferably, the second cooling mechanism includes a cooling square tube, which is fixedly connected to the left side of the square ring plate and the mounting platform. The left and right inner walls of the cooling square tube are jointly fixedly connected to a plurality of U-shaped air ducts that are equidistantly distributed in the vertical direction. The top of the mounting platform is fixedly connected to a third air cooler. The output end of the third air cooler is fixedly connected to a third connecting pipe. The other end of the third connecting pipe extends into the cooling square tube and is connected to a distribution pipe. Each of the U-shaped air ducts is connected to the distribution pipe. The front and rear inner walls of the cooling square tube are jointly rotatably connected to a plurality of sets of second guide rollers that are equidistantly distributed in the vertical direction. Each set of second guide rollers is located between two adjacent U-shaped air ducts. Each set of second guide rollers consists of two second guide rollers that are spaced apart on the left and right sides. A plurality of third air outlet nozzles are provided on the opposite sides of the left and right side pipes of the U-shaped air ducts.

[0015] Preferably, the winding section includes a winding frame fixedly connected to the top of the base, a winding roller rotatably connected inside the winding frame, a winding motor fixedly connected to the front side of the winding frame, and the output end of the winding motor fixedly connected to the roller shaft of the winding roller.

[0016] Compared with the prior art, the present invention provides a blown film device for plastic film production and processing, which has the following beneficial effects:

[0017] 1. This invention, by setting up a protective film mechanism with a linked L-shaped plate and protective roller, can achieve full circumferential protection for the blown film, effectively preventing the film from being damaged or wrinkled due to scratches or airflow disturbances. At the same time, it is combined with a first cooling mechanism with upper and lower double-layer annular air outlets and a second cooling mechanism with air outlets on both sides to form a multi-stage cooling system, which can uniformly and quickly cool and shape the film, greatly improving the appearance and dimensional accuracy of the film after molding and ensuring the quality of the finished product.

[0018] 2. The guiding flattening mechanism of the present invention is equipped with an adjustable structure that can flexibly adjust the spacing. The elastic extrusion component and the elastic tensioning mechanism respectively achieve elastic extrusion and adaptive adjustment of tension through springs. Each mechanism can adapt to the production needs of plastic films of different specifications and thicknesses. The entire process adopts flexible contact treatment to avoid stretching and deformation of the film. At the same time, the process of each mechanism is smoothly connected, so that the film remains flat during the conveying, flattening and winding process, effectively improving the overall production efficiency and finished product qualification rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of the drive unit in this invention;

[0022] Figure 4 This is a schematic diagram of the protective roller in this invention;

[0023] Figure 5 This is a schematic diagram of the bottom structure of the first fixing ring in this invention;

[0024] Figure 6 This is a schematic diagram of the structure of the first cooling mechanism in this invention;

[0025] Figure 7 This is a schematic diagram of the structure of the second zigzag frame in this invention;

[0026] Figure 8 In this invention Figure 7 A magnified structural diagram at point A;

[0027] Figure 9 This is a schematic diagram of the elastic extrusion assembly in this invention;

[0028] Figure 10 In this invention Figure 7 A magnified structural diagram at point B;

[0029] Figure 11 This is a schematic diagram of the U-shaped duct structure in this invention.

[0030] The numbers on the map are:

[0031] 1. Base; 101. First upright; 102. Square ring plate; 103. Blown film die head; 104. Main body of blown film machine; 105. Mounting platform;

[0032] 2. Protective film mechanism; 201. First fixing ring; 202. Second upright; 203. Second fixing ring; 204. L-shaped plate; 205. First mounting groove; 206. Linkage rod; 207. First C-shaped frame; 208. Protective roller; 209. Drive unit; 2091. Second mounting groove; 2092. First cylinder; 2093. Connecting block; 2094. Extension plate;

[0033] 3. First cooling mechanism; 301. Annular groove; 302. First annular air duct; 303. First air cooler; 304. First connecting pipe; 305. First air outlet nozzle; 306. Second air cooler; 307. Second annular air duct; 308. Second connecting pipe; 309. Second air outlet nozzle;

[0034] 4. Flattening guide mechanism; 401. Second C-shaped frame; 402. Guide roller; 403. Spacing adjustment mechanism; 4031. Second cylinder; 4032. Drive plate; 4033. First guide rod; 4034. First reinforcing plate; 4035. Sliding rod; 4036. Fitting slot; 4037. Limiting plate;

[0035] 5. Elastic extrusion assembly; 501. Mounting base; 502. First guide roller; 503. Third mounting groove; 504. Crossbar; 505. Third C-shaped frame; 506. First spring; 507. Extrusion roller;

[0036] 6. Elastic tensioning mechanism; 601. Third cylinder; 602. Mounting plate; 603. Second guide rod; 604. Second reinforcing plate; 605. Telescopic rod; 606. V-shaped frame; 607. Second spring; 608. Tensioning roller;

[0037] 7. Second cooling mechanism; 701. Cooling square tube; 702. U-shaped air duct; 703. Third air cooler; 704. Third connecting pipe; 705. Diverter pipe; 706. Third air outlet nozzle; 707. Second guide roller;

[0038] 8. Rewinding section; 801. Rewinding frame; 802. Rewinding roller; 803. Rewinding motor. Detailed Implementation

[0039] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art.

[0040] Example 1

[0041] Please refer to Figures 1 to 11As shown, a blown film production and processing device for plastic film includes a base 1. Four first uprights 101, symmetrically arranged in pairs, are fixedly connected to the top of the base 1. A square ring plate 102 is fixedly connected to the top of the four first uprights 101. A blown film die 103 located in the middle of the first uprights 101 is fixedly connected to the top of the base 1. A blown film machine body 104 located to the right of the blown film die 103 is fixedly connected to the top of the base 1. The blown film machine body 104 is connected to the blown film die 103. An installation platform 105 located above the blown film die 103 is fixedly connected to the four first uprights 101. The mounting platform 105 has a clearance channel in the middle that is compatible with the blown film die head 103. A film protection mechanism 2 is installed on the top of the mounting platform 105. A first cooling mechanism 3 is installed inside the film protection mechanism 2. A guide flattening mechanism 4 is installed on the four first uprights 101 above the film protection mechanism 2. An elastic extrusion assembly 5 is installed inside the square ring plate 102. An elastic tensioning mechanism 6 is installed on the left edge of the top of the square ring plate 102. The square ring plate 102 and the left side of the mounting platform 105 are connected to a second cooling mechanism 7. A winding part 8 is also installed on the top of the base 1 on the left side of the blown film die head 103.

[0042] Those skilled in the art will understand that the blown film machine body 104 conveys molten plastic to the blown film die head 103 to complete the blown film forming. The formed film passes through the film protection mechanism 2 and the first cooling mechanism 3 on the mounting platform 105 in sequence, and then through the guide flattening mechanism 4, the elastic extrusion component 5 in the square ring plate 102, the elastic tensioning mechanism 6, and the second cooling mechanism 7. Finally, it is wound up by the winding section 8. The various mechanisms are arranged and connected in sequence along the film conveying direction to build a complete processing system from blown film forming to winding up. This realizes the integrated continuous production of plastic film, effectively simplifies the production process, improves the overall continuity of film processing, and lays a structural foundation for the subsequent fine processing of each mechanism.

[0043] Example 2

[0044] Furthermore, the protective film mechanism 2 includes a first fixing ring 201 fixedly connected to the top of the mounting platform 105. A plurality of second uprights 202 arranged in a circular array are fixedly connected to the top of the first fixing ring 201. A second fixing ring 203 is fixedly connected to the top of each second upright 202. An L-shaped plate 204 is rotatably connected to each second upright 202. The side of the L-shaped plate 204 with the horizontal plate faces radially outward from the first fixing ring 201, and a first mounting groove 205 is provided on the horizontal plate. A linkage rod 206 is rotatably connected between the first mounting slots 205 of two adjacent L-shaped plates 204. Several first chamfered frames 207 are fixedly connected to the side of the L-shaped plate 204 away from its horizontal plate, which are distributed at equal intervals from top to bottom. A protective roller 208 is rotatably connected inside the first chamfered frame 207. A drive unit 209 is provided between the second fixing ring 203 and one of the L-shaped plates 204. Several first chamfered frames 207 on two adjacent L-shaped plates 204 are staggered vertically.

[0045] Those skilled in the art will understand that the protective film mechanism 2 achieves the annular array fixation of the second upright 202 through the first fixed ring 201 and the second fixed ring 203. The driving unit 209 drives one of the L-shaped plates 204 to rotate around the second upright 202. Adjacent L-shaped plates 204 achieve synchronous rotation through the linkage rod 206, thereby driving the first cubital frame 207 and the protective roller 208 on each L-shaped plate 204 to adjust their positions synchronously. The first cubital frame 207 on adjacent L-shaped plates 204 are staggered vertically, so that the protective roller 208 forms a full-circumferential flexible protection for the film blown out by the blown film die head 103. This linkage adjustment design can adapt to films with different blown diameters. The rolling contact of the protective roller 208 can avoid hard friction with the film, effectively preventing damage and wrinkles caused by external forces and airflow disturbances during the film forming process, and ensuring the integrity of the film in the early stage of forming.

[0046] Example 3

[0047] Furthermore, the drive unit 209 includes a second mounting groove 2091 opened on the outside of the second fixing ring 203. The interior of the second mounting groove 2091 is rotatably connected to the first cylinder 2092 via a rotating shaft. An extension plate 2094 is integrally formed on the outer side of the top of one of the L-shaped plates 204. A connecting block 2093 is rotatably connected to the top of the outer end of the extension plate 2094. The output end of the first cylinder 2092 is fixedly connected to one side of the connecting block 2093.

[0048] Those skilled in the art will understand that the first cylinder 2092 of the drive unit 209 is rotatably connected to the second mounting groove 2091 of the second fixed ring 203 via a rotating shaft. When the output end of the first cylinder 2092 extends or retracts, the L-shaped plate 204, which is integrally formed with the extension plate 2094, is driven to rotate around the second upright 202 via the connecting block 2093. The linear extension and retraction of the cylinder is converted into the circumferential swing of the L-shaped plate 204, thereby realizing the automated adjustment of the protective film mechanism 2. Compared with manual adjustment, the adjustment efficiency and accuracy are greatly improved. Moreover, the rotating connection design of the rotating shaft and the connecting block 2093 can adapt to the angle changes between the extension and retraction of the cylinder and the rotation of the L-shaped plate 204, avoiding jamming and uneven force during transmission, and ensuring the smooth operation of the protective film mechanism 2.

[0049] Example 4

[0050] Furthermore, the first cooling mechanism 3 includes an annular groove 301 formed at the bottom of the first fixing ring 201, a first annular air duct 302 fixedly connected in the annular groove 301, a first air cooler 303 fixedly connected to the top of the mounting platform 105, a first connecting pipe 304 connecting the output end of the first air cooler 303 to the first annular air duct 302, a plurality of first air outlet nozzles 305 evenly distributed in the inner ring of the first annular air duct 302, a second air cooler 306 fixedly connected to the top of the mounting platform 105, a second annular air duct 307 fixedly connected to the top of the second fixing ring 203, a second connecting pipe 308 connecting the output end of the second air cooler 306 to the second annular air duct 307, a plurality of second air outlet nozzles 309 evenly distributed in the inner ring of the second annular air duct 307.

[0051] Those skilled in the art will understand that the cold air generated by the first air cooler 303 is transported to the first annular air duct 302 via the first connecting pipe 304 and blown onto the film through the first air outlet nozzle 305 on its inner side. The cold air generated by the second air cooler 306 is transported to the second annular air duct 307 via the second connecting pipe 308 and blown onto the film through the second air outlet nozzle 309. The first annular air duct 302 and the second annular air duct 307 are arranged in a double-layer annular pattern, with the nozzles on their inner sides evenly distributed. This allows for uniform airflow to the film from both the top and bottom directions, achieving rapid and uniform cooling and shaping of the film. This avoids problems such as thickness deviation, warping, and uneven shrinkage after film shaping caused by unilateral cooling and localized airflow, effectively improving the forming quality and dimensional accuracy of the film.

[0052] Example 5

[0053] Furthermore, the guiding flattening mechanism 4 includes two second C-shaped frames 401 arranged symmetrically on the left and right. Both second C-shaped frames 401 are inclined. The top ends of the two second C-shaped frames 401 are close to each other, and the bottom ends are far apart from each other. The bottom ends of the two second C-shaped frames 401 are hinged between two first uprights 101 on the same side. Several guide rollers 402 are rotatably connected inside the second C-shaped frames 401. The front and rear edges of the square ring plate 102 are provided with a spacing adjustment mechanism 403 connected to the two second C-shaped frames 401.

[0054] As will be understood by those skilled in the art, the two second C-shaped frames 401 are arranged symmetrically and at an incline, with their bottom ends hinged to the first upright 101. Several guide rollers 402 inside guide and convey the film that has been protected and pre-cooled. At the same time, the spacing adjustment mechanism 403 on the square ring plate 102 can adjust the spacing between the top ends of the two second C-shaped frames 401. The inclined second C-shaped frames 401 gradually flatten the film during the guiding process, avoiding sudden flattening that would cause the film to stretch and deform. The rolling contact of the guide rollers 402 reduces the friction with the film, preventing scratches on the film surface. The spacing adjustment design can adapt to the flattening processing of films with different thicknesses and widths, improving the adaptability and flexibility of the device.

[0055] Example 6

[0056] Furthermore, the spacing adjustment mechanism 403 includes a second cylinder 4031 fixedly connected to the square ring plate 102. A drive plate 4032 is fixedly connected to the bottom output end of the second cylinder 4031. A first guide rod 4033 symmetrically distributed on the left and right sides of the second cylinder 4031 is fixedly connected to the top of the drive plate 4032. Both first guide rods 4033 are slidably connected to the square ring plate 102. A first reinforcing plate 4034 is fixedly connected to the top of both first guide rods 4033. Sliding rods 4035 are fixedly connected to the front and rear sides of the top of the two second C-shaped frames 401. A mating groove 4036 adapted to the sliding rod 4035 is horizontally opened on the drive plate 4032. A limit plate 4037 is fixedly connected to the end of the sliding rod 4035 away from the second C-shaped frame 401. The sliding rods 4035 on the same side of the two second C-shaped frames 401 are slidably disposed in the mating groove 4036 of the spacing adjustment mechanism 403 on the same side.

[0057] As will be understood by those skilled in the art, the extension and retraction of the second cylinder 4031 can drive the drive plate 4032 to move up and down. The first guide rod 4033 plays a guiding and limiting role in the movement of the drive plate 4032. The first reinforcing plate 4034 improves the connection stability of the first guide rod 4033. When the drive plate 4032 moves up and down, its cooperating slot 4036 drives the sliding rod 4035 on the second crescent frame 401 to slide, thereby pulling the two second crescent frames 401 to swing around the hinge point to realize the adjustment of the top spacing. The limiting plate 4037 can prevent the sliding rod 4035 from falling out of the cooperating slot 4036. This structure realizes the precise adjustment of the flattening spacing through the automatic drive of the cylinder, replacing the traditional manual adjustment method, improving the adjustment efficiency. Moreover, the guiding design of the first guide rod 4033 ensures the smooth movement of the drive plate 4032, avoids the deviation during the spacing adjustment process, and ensures the uniformity of film flattening.

[0058] Example 7

[0059] Furthermore, the elastic extrusion assembly 5 includes mounting seats 501 fixedly connected to the front and rear sides of the inner wall of the square ring plate 102. A first guide roller 502 located on the left side is rotatably connected between the two mounting seats 501. A third mounting groove 503 is provided on the opposite side of the two mounting seats 501. Two parallel crossbars 504 are fixedly connected in the third mounting groove 503. A third slidable frame 505 is slidably connected to the four crossbars 504. A first spring 506 is sleeved on each crossbar 504. One end of the first spring 506 is fixedly connected to the third slidable frame 505, and the other end of the first spring 506 is fixedly connected to the inner wall of the third mounting groove 503. An extrusion roller 507 is rotatably connected in the third slidable frame 505.

[0060] Those skilled in the art will understand that the two mounting seats 501 enable the fixed rotation of the first guide roller 502, the crossbar 504 in the third mounting groove 503 provides sliding support for the third convex frame 505, and the elastic force of the first spring 506 pushes the third convex frame 505 to move towards the first guide roller 502, so that the extrusion roller 507 in the third convex frame 505 cooperates with the first guide roller 502 to elastically extrude the film. During the film conveying process, the extrusion roller 507 can automatically adjust the distance between itself and the first guide roller 502 according to the thickness of the film to achieve adaptive elastic extrusion, avoid rigid extrusion that causes the film to stretch and break, and further flatten the film to a preset thickness, improve the flatness of the film, and prepare for subsequent winding.

[0061] Example 8

[0062] Furthermore, the elastic tensioning mechanism 6 includes a third cylinder 601 fixedly connected to the left edge of the square ring plate 102. The top output end of the third cylinder 601 is fixedly connected to a mounting plate 602. The bottom of the mounting plate 602 is fixedly connected to second guide rods 603 symmetrically distributed on the front and rear sides of the third cylinder 601. Both second guide rods 603 are slidably connected to the square ring plate 102. The bottom ends of the two second guide rods 603 are fixedly connected to a second reinforcing plate 604. The top of the mounting plate 602 is fixedly connected to two symmetrically distributed telescopic rods 605. The top ends of the two telescopic rods 605 are fixedly connected to a V-shaped frame 606. A second spring 607 sleeved on the outside of the telescopic rods 605 is fixedly connected between the V-shaped frame 606 and the mounting plate 602. Two tensioning rollers 608 are rotatably connected inside the V-shaped frame 606, spaced apart on the left and right.

[0063] Those skilled in the art will understand that the extension and retraction of the third cylinder 601 can drive the mounting plate 602 to move up and down, the second guide rod 603 guides the movement of the mounting plate 602, the second reinforcing plate 604 improves the connection strength of the second guide rod 603, the telescopic rod 605 on the mounting plate 602 provides support for the V-shaped frame 606, and the elastic force of the second spring 607 ensures that the two tension rollers 608 inside the V-shaped frame 606 always form elastic pressure against the film. The third cylinder 601 can adjust the overall height of the tension rollers 608 to match the film conveying height, and the elastic design of the second spring 607 can automatically adjust according to the tension changes during film conveying, effectively avoiding the film from stretching and deforming due to excessive tension or wrinkling and shifting due to insufficient tension, thus ensuring the stability of the film tension during conveying.

[0064] Example 9

[0065] Furthermore, the second cooling mechanism 7 includes a cooling square tube 701, which is fixedly connected to the square ring plate 102 and the left side of the mounting platform 105. Several U-shaped air ducts 702, evenly spaced vertically, are fixedly connected to the left and right inner walls of the cooling square tube 701. A third air cooler 703 is fixedly connected to the top of the mounting platform 105. A third connecting pipe 704 is fixedly connected to the output end of the third air cooler 703, and the other end of the third connecting pipe 704 extends to the cooling square tube 701. The cooling square tube 701 is connected to a split pipe 705. Each U-shaped air duct 702 is connected to the split pipe 705. The front and rear inner walls of the cooling square tube 701 are rotatably connected to several sets of second guide rollers 707 that are equidistantly distributed in the vertical direction. Each set of second guide rollers 707 is located between two adjacent U-shaped air ducts 702. Each set of second guide rollers 707 consists of two second guide rollers 707 that are spaced apart on the left and right. Several third air outlet nozzles 706 are provided on the opposite sides of the two side pipes on the left and right sides of the U-shaped air duct 702.

[0066] Those skilled in the art will understand that the cold air generated by the third air cooler 703 is transported to the distribution pipe 705 via the third connecting pipe 704 and evenly distributed to each U-shaped air duct 702. Then, the air is blown to both sides of the film passing through the cooling square tube 701 through the third air outlet nozzles 706 on both sides of the U-shaped air duct 702. Several sets of second guide rollers 707 guide the film, so that the film is transported smoothly in the cooling square tube 701. This structure realizes secondary double-sided cooling of the film, further improving the cooling and shaping effect, and preventing the film from shrinking and deforming during the subsequent winding process due to insufficient cooling. In addition, the U-shaped air ducts 702 and the second guide rollers 707 are alternately arranged to make the film cooling more uniform and effectively ensure the final forming quality of the film.

[0067] Example 10

[0068] Furthermore, the winding section 8 includes a winding frame 801 fixedly connected to the top of the base 1, a winding roller 802 rotatably connected inside the winding frame 801, a winding motor 803 fixedly connected to the front side of the winding frame 801, and the output end of the winding motor 803 fixedly connected to the roller shaft of the winding roller 802.

[0069] As will be understood by those skilled in the art, the winding frame 801 provides rotational support for the winding roller 802. After the winding motor 803 starts, it drives the roller shaft of the winding roller 802 to rotate, so that the film, which has undergone multiple processing and shaping, is wound on the winding roller 802 to achieve automatic winding. The motor-driven method ensures the uniformity of the winding speed and avoids film stretching and wrinkling caused by uneven speed during the winding process. It realizes the automated winding of film processing, replaces the traditional manual winding, and greatly improves the winding efficiency. At the same time, the rotational connection design of the winding roller 802 ensures the smoothness of the winding process and facilitates the disassembly and replacement of the film roll after winding.

[0070] The working principle and usage process of this device are as follows: The blown film machine body 104 is started, which conveys molten plastic to the blown film die head 103 on the base 1 to complete the blown film forming. The formed film passes upward through the clearance channel of the mounting platform 105. At this time, the drive unit 209 of the protective film mechanism 2 drives the L-shaped plate 204 to rotate around the second upright 202, and drives each protective roller 208 to form full circumferential protection for the film through the linkage rod 206. Simultaneously, the first cooling fan 303 and the second cooling fan 306 of the first cooling mechanism 3 respectively perform double-layer full circumferential preliminary cooling of the film through the nozzles of the first annular air duct 302 and the second annular air duct 307. After protection and preliminary cooling, the film continues to be conveyed upward and enters the guide flattening mechanism 4. The spacing adjustment mechanism 403 adjusts the spacing of the two second C-shaped frames 401 according to the film thickness. The film is progressively guided and flattened by the internal guide roller 402. After flattening, the film enters the square ring plate 102 and is further flattened by the elastic extrusion assembly 5. The first guide roller 502 and the extrusion roller 507 are elastically extruded by the elastic extrusion assembly 5. Then, the film passes through the elastic tensioning mechanism 6. The third cylinder 601 adjusts the height of the tensioning roller 608, and the second spring 607 drives the tensioning roller 608 to achieve elastic tension on the film, ensuring stable conveying tension. The tensioned film enters the cooling square tube 701 of the second cooling mechanism 7 and is cooled and shaped by the double-sided air blowing of the U-shaped air duct 702. The second guide roller 707 ensures smooth film conveying. Finally, the film, which has been shaped by multiple processes, is rotated by the winding motor 803 of the winding section 8, which drives the winding roller 802 to achieve automated and uniform winding, completing the entire plastic film blowing process.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A blown film production and processing device for plastic film, comprising a base (1), characterized in that, The base (1) is fixedly connected to four first uprights (101) symmetrically distributed in pairs. The top of the four first uprights (101) is fixedly connected to a square ring plate (102). The base (1) is fixedly connected to a blown film die head (103) located in the middle of the first uprights (101). The base (1) is fixedly connected to a blown film machine body (104) located to the right of the blown film die head (103). The blown film machine body (104) is connected to the blown film die head (103). The four first uprights (101) are fixedly connected to an installation platform (105) located above the blown film die head (103). The middle of the installation platform (105) is provided with a connection to the blown film die head. The die head (103) has a clearance channel that is compatible with it. The top of the mounting platform (105) is equipped with a protective film mechanism (2). The protective film mechanism (2) is equipped with a first cooling mechanism (3). The four first uprights (101) are equipped with a guide flattening mechanism (4) located above the protective film mechanism (2). The inside of the square ring plate (102) is equipped with an elastic extrusion assembly (5). The left edge of the top of the square ring plate (102) is equipped with an elastic tensioning mechanism (6). The square ring plate (102) and the left side of the mounting platform (105) are connected together with a second cooling mechanism (7). The top of the base (1) is also equipped with a winding part (8) located on the left side of the blown film die head (103). The protective film mechanism (2) includes a first fixing ring (201) fixedly connected to the top of the mounting platform (105). A plurality of second uprights (202) arranged in a circular array are fixedly connected to the top of the first fixing ring (201). A second fixing ring (203) is fixedly connected to the top of each second upright (202). An L-shaped plate (204) is rotatably connected to each second upright (202). The side of the L-shaped plate (204) with a horizontal plate faces radially outward from the first fixing ring (201), and a first mounting groove (205) is provided on the horizontal plate. Adjacent... A linkage rod (206) is rotatably connected between the first mounting slots (205) of the two L-shaped plates (204). A number of first cubit frames (207) are fixedly connected to the side of the L-shaped plate (204) away from its horizontal plate, which are distributed at equal intervals from top to bottom. A protective roller (208) is rotatably connected inside the first cubit frame (207). A driving unit (209) is provided between the second fixing ring (203) and one of the L-shaped plates (204). A number of first cubit frames (207) on two adjacent L-shaped plates (204) are staggered up and down in the vertical direction.

2. The blown film device for plastic film production and processing according to claim 1, characterized in that, The drive unit (209) includes a second mounting groove (2091) opened on the outside of the second fixing ring (203). The interior of the second mounting groove (2091) is rotatably connected to a first cylinder (2092) via a rotating shaft. An extension plate (2094) is integrally formed on the outer side of the top of one of the L-shaped plates (204). A connecting block (2093) is rotatably connected to the top of the outer end of the extension plate (2094). The output end of the first cylinder (2092) is fixedly connected to one side of the connecting block (2093).

3. The blown film device for plastic film production and processing according to claim 1, characterized in that, The first cooling mechanism (3) includes an annular groove (301) at the bottom of the first fixing ring (201), a first annular air duct (302) is fixedly connected in the annular groove (301), a first air cooler (303) is fixedly connected to the top of the mounting platform (105), a first connecting pipe (304) is connected between the output end of the first air cooler (303) and the first annular air duct (302), a plurality of first air outlet nozzles (305) are evenly distributed in the inner ring of the first annular air duct (302), a second air cooler (306) is also fixedly connected to the top of the mounting platform (105), a second annular air duct (307) is fixedly connected to the top of the second fixing ring (203), a second connecting pipe (308) is connected between the output end of the second air cooler (306) and the second annular air duct (307), a plurality of second air outlet nozzles (309) are evenly distributed in the inner ring of the second annular air duct (307).

4. The blown film device for plastic film production and processing according to claim 1, characterized in that, The guiding flattening mechanism (4) includes two second C-shaped frames (401) arranged symmetrically on the left and right. Both second C-shaped frames (401) are inclined. The top ends of the two second C-shaped frames (401) are close to each other, and the bottom ends are far apart from each other. The bottom ends of the two second C-shaped frames (401) are hinged between two first uprights (101) on the same side. Several guide rollers (402) are rotatably connected inside the second C-shaped frame (401). The front and rear edges of the square ring plate (102) are provided with a spacing adjustment mechanism (403) connected to the two second C-shaped frames (401).

5. The blown film device for plastic film production and processing according to claim 4, characterized in that, The spacing adjustment mechanism (403) includes a second cylinder (4031) fixedly connected to a square ring plate (102). A drive plate (4032) is fixedly connected to the bottom output end of the second cylinder (4031). A first guide rod (4033) symmetrically distributed on the left and right sides of the second cylinder (4031) is fixedly connected to the top of the drive plate (4032). Both first guide rods (4033) are slidably connected to the square ring plate (102). A first reinforcing plate is fixedly connected to the top of both first guide rods (4033). 4034), sliding rods (4035) are fixedly connected to the front and rear sides of the top of the two second C-shaped frames (401). The drive plate (4032) is horizontally provided with a matching through groove (4036) that is adapted to the sliding rod (4035). A limiting plate (4037) is fixedly connected to one end of the sliding rod (4035) away from the second C-shaped frame (401). The sliding rods (4035) on the same side of the two second C-shaped frames (401) are slidably arranged in the matching through groove (4036) of the same side spacing adjustment mechanism (403).

6. The blown film device for plastic film production and processing according to claim 1, characterized in that, The elastic extrusion assembly (5) includes mounting seats (501) fixedly connected to the front and rear sides of the inner wall of the square ring plate (102). A first guide roller (502) located on the left side is rotatably connected between the two mounting seats (501). A third mounting groove (503) is opened on the opposite side of the two mounting seats (501). Two parallel crossbars (504) are fixedly connected in the third mounting groove (503). A third zigzag frame (505) is slidably connected on the four crossbars (504). A first spring (506) is sleeved on each crossbar (504). One end of the first spring (506) is fixedly connected to the third zigzag frame (505), and the other end of the first spring (506) is fixedly connected to the inner wall of the third mounting groove (503). An extrusion roller (507) is rotatably connected in the third zigzag frame (505).

7. The blown film device for plastic film production and processing according to claim 1, characterized in that, The elastic tensioning mechanism (6) includes a third cylinder (601) fixedly connected to the left edge of the square ring plate (102). The top output end of the third cylinder (601) is fixedly connected to a mounting plate (602). The bottom of the mounting plate (602) is fixedly connected to second guide rods (603) symmetrically distributed on the front and rear sides of the third cylinder (601). Both second guide rods (603) are slidably connected to the square ring plate (102). The bottom ends of the two second guide rods (603) are fixedly connected to a second reinforcing plate (604). The top of the mounting plate (602) is fixedly connected to two telescopic rods (605) symmetrically distributed. The top ends of the two telescopic rods (605) are fixedly connected to a V-shaped frame (606). The V-shaped frame (606) and the mounting plate (602) are fixedly connected to a second spring (607) sleeved on the outside of the telescopic rods (605). Two tensioning rollers (608) are rotatably connected inside the V-shaped frame (606) and spaced apart on the left and right.

8. The blown film device for plastic film production and processing according to claim 1, characterized in that, The second cooling mechanism (7) includes a cooling square tube (701), which is fixedly connected to the left side of the square ring plate (102) and the mounting platform (105). Several U-shaped air ducts (702) are fixedly connected to the left and right inner walls of the cooling square tube (701) at equal intervals along the vertical direction. A third air cooler (703) is fixedly connected to the top of the mounting platform (105). A third connecting pipe (704) is fixedly connected to the output end of the third air cooler (703). The other end of the third connecting pipe (704) extends to the cooling square tube (701). 01) A diversion pipe (705) is connected inside and outside. Each of the U-shaped air ducts (702) is connected to the diversion pipe (705). The front and rear inner walls of the cooling square tube (701) are rotatably connected to several sets of second guide rollers (707) that are equidistantly distributed in the vertical direction. Each set of second guide rollers (707) is located between two adjacent U-shaped air ducts (702). Each set of second guide rollers (707) is composed of two second guide rollers (707) that are spaced apart on the left and right. Several third air outlet nozzles (706) are provided on the opposite sides of the two side pipes on the left and right sides of the U-shaped air duct (702).

9. The blown film device for plastic film production and processing according to claim 1, characterized in that, The winding section (8) includes a winding frame (801) fixedly connected to the top of the base (1), a winding roller (802) rotatably connected inside the winding frame (801), a winding motor (803) fixedly connected to the front side of the winding frame (801), and the output end of the winding motor (803) fixedly connected to the roller shaft of the winding roller (802).

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