An apparatus and method for producing a degradable film

Abstract

The application provides a production equipment and method of degradable film, which comprises a plasticizing unit, a forming unit arranged at the discharging end of the plasticizing unit, and a winding unit arranged at the discharging end of the forming unit. The forming unit comprises an outer scraping assembly arranged at the outside of the formed film, a flattening assembly arranged at the side of the winding unit and used for flattening the formed film into a sheet shape, and a folding assembly arranged at the inside of the film and used for supporting and flattening the cylindrical film. The cylindrical film is gradually supported from the inside to be close to a sheet shape, so that the flattening can be directly performed from the position of linear feeding each time during the subsequent flattening work, and the misalignment of the film during winding caused by the uneven wind speed during the film blowing process is effectively overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of degradable film production, in particular to a production equipment and method of degradable film. BACKGROUND

[0002] A large number of film products used in daily life and industry are usually a kind of waste that pollutes the environment after use. With the continuous enhancement of people's environmental protection consciousness, the blow molding film process with degradability gradually popularizes.

[0003] Chinese patent CN 115157632 A discloses a degradable plastic film blow molding device, which comprises a support plate, a bottom plate is fixedly arranged on the top of the support plate, a control system, a heating assembly, a blower and an extrusion assembly are fixedly arranged on the top of the bottom plate, a filling port is fixedly arranged on the top of the heating assembly, a circular support frame is sleeved with the outer edge of the filling port, a support column is fixedly arranged on the top of the support plate, a refrigeration fan is fixedly arranged on the opposite side of the support column, a first cooling outlet is fixedly arranged on the inner wall of the support column, and a third roller group is fixedly arranged on the bottom of the support column.

[0004] However, the technical scheme and the prior art have the following defects:

[0005] 1. The direct extrusion method is used when the formed cylindrical film is processed into a sheet-shaped film, which causes wrinkles on the surface of the film during the extrusion process, and the wrinkles are irreversible and difficult to repair after winding.

[0006] 2. The film is not centered during the processing of the cylindrical film into a sheet-shaped film, which causes the film to be misaligned during winding due to the uneven wind speed of the wind wheel in each direction, resulting in wrinkles on the edges of the film and affecting the later use. SUMMARY

[0007] The present application aims to overcome the shortcomings of the prior art and provides a production equipment for degradable film. By flattening the outside of the film when it is blow molded into a cylindrical shape, the cylindrical film is effectively prevented from having inconsistent surface curvature due to uneven blow molding wind speed, and the uniformity of the cylindrical film thickness is improved. During the processing of the cylindrical film into a sheet-shaped film, the film is gradually raised to a sheet-like shape from the inside by the folding assembly, which effectively prevents the film from being misaligned during winding due to uneven blow molding wind speed. The sheet-like film is flattened before each winding, which effectively prevents wrinkles from occurring during the winding process.

[0008] To achieve the above object, the present application provides the following technical solutions.

[0009] A production equipment of degradable film, comprising:

[0010] A plasticizing unit;

[0011] A forming unit, which is arranged at the discharging end of the plasticizing unit;

[0012] A winding unit, which is arranged at the discharging end of the forming unit;

[0013] The forming unit comprises:

[0014] An outer flattening assembly, which is arranged at the outside of the formed film;

[0015] A flattening assembly, which is arranged at the side of the winding unit and is used for flattening the formed film into a sheet shape; and

[0016] A folding assembly, which is arranged at the inside of the film and is used for supporting the cylindrical film;

[0017] After the film is extruded by the plasticizing unit, it enters the forming unit in the shape of a cylinder under the blowing action of the wind wheel. The outer flattening assembly flattens the continuously fed film into a cylindrical shape by rotating around the outside of the cylindrical film. The flattened cylindrical film is supported into a flat shape by the folding assembly, and then is flattened by the flattening assembly and is wound at the winding unit.

[0018] As an improvement, the outer flattening assembly comprises:

[0019] A sleeve plate;

[0020] A first driven gear, which is rotatably connected inside the sleeve plate;

[0021] A gear ring, which is engaged at the side of the first driven gear and is located inside the sleeve plate;

[0022] The upper and lower ends of the gear ring are connected with scrapers;

[0023] The inside of the scraper is rotatably connected with a flattening wheel, which is in contact with the outer surface of the cylindrical film.

[0024] As an improvement, the flattening assembly comprises:

[0025] A support plate;

[0026] An inclined plate, which is arranged at the upper part of the support plate and is located at the film outlet;

[0027] A scraping mechanism is connected to the upper end of the support plate and located at the side of the inclined plate;

[0028] A herringbone is rotatably connected to the lower part of the support plate and located at the inlet of the film; and

[0029] A second driving mechanism is connected to the front end of the support plate.

[0030] As an improvement, a first accommodating cavity is arranged on the right side of the scraping mechanism;

[0031] A second accommodating cavity is arranged on the left side of the scraping mechanism;

[0032] A reciprocating screw rod is rotatably connected in the first accommodating cavity;

[0033] Reciprocating rails are arranged on both sides of the reciprocating screw rod;

[0034] An eccentric rail is arranged in the middle of the reciprocating screw rod.

[0035] As an improvement, the second accommodating cavity is through between the first accommodating cavity;

[0036] A reciprocating swing block is slidingly inserted in the second accommodating cavity;

[0037] Sliding rails corresponding to the reciprocating rails are arranged on both sides of the reciprocating swing block;

[0038] A reciprocating swing rod is slidingly inserted in the sliding rails;

[0039] A scraping plate is connected to the side of the reciprocating swing rod;

[0040] A push rod is connected to the side of the reciprocating swing block corresponding to the eccentric rail.

[0041] As an improvement, a plurality of guide rollers are rotatably connected in the herringbone;

[0042] Adjusting rollers mounted on the lower part of the support plate are rotatably connected on the upper side of the herringbone;

[0043] One end of the adjusting rollers is connected to an adjusting gear;

[0044] A first adjusting half gear is engaged on the upper end of the adjusting gear;

[0045] The first adjusting half gear is connected to a second adjusting half gear through a third belt;

[0046] The gear distribution directions of the first adjusting half gear and the second adjusting half gear are opposite.

[0047] As an improvement, the folding assembly comprises:

[0048] Helical gear shaft;

[0049] Third rotating wheel, which is connected to the lower end of the helical gear shaft;

[0050] Gas outlet pipe, which is connected to the upper end of the plasticizing unit and located inside the film;

[0051] The guide block is fixedly inserted inside the gas outlet pipe;

[0052] The lifting rod is slidingly inserted inside the guide block;

[0053] The lifting rod is in the shape of "L" and its bottom is located below the third rotating wheel;

[0054] The third rotating wheel is connected with a protruding part at its lower end.

[0055] As an improvement, the upper end of the gas outlet pipe is connected with a mounting rack;

[0056] The upper end of the mounting rack is connected with two inclined rails on both sides;

[0057] The lifting rod is slidingly connected with the mounting rack;

[0058] The outer side of the lifting rod is sleeved with a second return spring at the upper end of the mounting rack;

[0059] The outer side of the lifting rod is sleeved with a limiting plate at the upper end of the second return spring.

[0060] As an improvement, the upper end of the mounting rack is connected with a terminal guide wheel on both sides;

[0061] The upper end of the lifting rod is connected with a lifting rack;

[0062] The lifting rack is telescopic and internally inserted with a thrust spring;

[0063] The side of the lifting rack is connected with a lifting block matched with the inclined rail;

[0064] The opposite side of the lifting block and the inclined rail is provided with an inclined surface;

[0065] The side of the lifting block is connected with an expansion guide wheel.

[0066] Another object of the present application is to provide a production equipment for degradable film and a method for producing degradable film to overcome the shortcomings of the prior art.

[0067] Step one: plasticizing extrusion process, the raw material enters the feeding hopper and is extruded into the discharge cavity through the extrusion cavity;

[0068] Step two: film blowing forming process, the film is blown out of the cylinder and continuously fed upward under the action of the wind wheel after being discharged from the discharge cavity;

[0069] Step three: film external flattening process, the external scraping assembly rotates along the outside of the cylindrical film to flatten the outside of the fed film;

[0070] Step four: film internal flattening process, the folding assembly reciprocatingly moves inside the cylindrical film to flatten the cylindrical film;

[0071] Step five: film external flattening process, the flattening assembly reciprocatingly moves to flatten the film after flattening;

[0072] Step six: traction winding process, the winding unit rotates to wind the flattened film.

[0073] The beneficial effects of the present application are:

[0074] (1) The first driven gear is driven to rotate by the bevel gear shaft, and the scraper is driven to rotate along the outer surface of the cylindrical film under the action of the scraping wheel by the gear ring, so that the curvature of each position of the cylindrical film remains consistent, thereby overcoming the situation that the surface curvature of the cylindrical film is inconsistent due to uneven blowing film wind speed, and improving the uniformity of the cylindrical film thickness.

[0075] (2) The cylindrical film is gradually raised from the inside to approach a sheet shape, so that it can be directly flattened from the position that is fed linearly each time during subsequent flattening, effectively overcoming the misalignment phenomenon of the film during winding due to uneven blowing film wind speed.

[0076] (3) The second adjusting half gear drives the herringbone frame to gradually extrude the cylindrical film inward to approach a sheet film state under the action of the adjusting roller through the adjusting gear, and cooperates with the expansion guide wheel to synchronously extrude outward inside the film, further avoiding the situation that wrinkles appear when the cylindrical film is processed into a sheet film, and improving the processing accuracy of the sheet film.

[0077] (4) The eccentric rail large arc surface drives the push rod to push the reciprocating swing block to compress the first return spring and move along the second accommodating cavity, the reciprocating swing block drives the flattening plate to move to contact the surface of the sheet film through the reciprocating swing rod, and at the same time, the reciprocating lead screw drives the reciprocating swing rod to move along the slide rail through the first belt, the reciprocating swing rod drives the flattening plate to flatten the film surface from inside to outside along the film surface, thereby achieving good flattening effect and effectively preventing wrinkles during winding.

[0078] (5) the second drive mechanism of the application can realize the film external smoothing process, film internal flattening process and film external leveling process, and has good synchronization and can realize the effect of automatically processing the film from a cylindrical shape to a wrinkle-free flat shape in cooperation with the continuity of the film feeding.

[0079] In summary, the application has the advantages of preventing wrinkles in the blowing process, more uniform film thickness, etc. BRIEF DESCRIPTION OF DRAWINGS

[0080] Figure 1 It is a schematic diagram of the overall structure of the application;

[0081] Figure 2 It is an enlarged view of A in the application; Figure 1

[0082] Figure 3 It is a schematic diagram of the winding unit structure of the application;

[0083] Figure 4 It is a schematic diagram of the internal structure of the outer scraping and flattening assembly of the application;

[0084] Figure 5 It is a schematic diagram of the flattening assembly structure of the application;

[0085] Figure 6 It is a scraping plate motion state diagram of the application;

[0086] Figure 7 It is a schematic diagram of the internal structure of the scraping and flattening mechanism of the application;

[0087] Figure 8 It is a schematic diagram of the structure of the air outlet pipe inside the film of the application;

[0088] Figure 9 It is a schematic diagram of the film blowing process structure of the application;

[0089] Figure 10 It is a folding assembly motion state diagram of the application;

[0090] Figure 11 It is a cooperation relationship diagram of the flattening assembly and the folding assembly of the application;

[0091] Figure 12 It is a schematic diagram of the structure of the protruding part of the application;

[0092] Figure 12 It is a schematic diagram of the structure of the protruding part of the application;

[0093] Figure 13 It is a cooperation relationship diagram of the eccentric rail and the reciprocating swing lever of the application;

[0094] Figure 14 It is a process flow diagram of the application. ​

[0095] 1, plasticizing unit; 101, extrusion cavity; 102, feeding hopper; 103, first driving mechanism; 104, discharging cavity; 105, protective cover;

[0096] 2, forming unit; 21, outer scraping assembly; 211, sleeve plate; 212, first driven gear; 213, gear ring; 214, scraper; 215, scraping wheel; 22, flattening assembly; 221, support plate; 222, inclined plate; 223, flattening mechanism; 2231, first accommodating cavity; 2232, second accommodating cavity; 2233, reciprocating screw; 22331, reciprocating rail; 22332, eccentric rail; 22333, first rotating wheel; 223331, first belt; 22334, second rotating wheel; 223341, second belt; 2234, reciprocating swing block; 22341, sliding rail; 22342, push rod; 22343, reciprocating swing rod; 22344, flattening plate; 22345, limiting rod; 22346, first return spring; 224, A-frame; 2241, guide roller; 2242, adjusting roller; 22421, adjusting gear; 22422, first adjusting half gear; 22423, second adjusting half gear; 22424, third belt; 225, second driving mechanism; 2251, first bevel gear; 23, folding assembly; 231, bevel gear shaft; 2311, second bevel gear; 232, third rotating wheel; 2321, protruding portion; 233, air outlet pipe; 2331, guide block; 2332, lifting rod; 23321, second return spring; 23322, limiting plate; 2333, mounting frame; 23331, inclined rail; 23332, terminal guide wheel; 2334, lifting frame; 23341, lifting block; 233411, inclined surface; 23342, expansion guide wheel; 23343, thrust spring;

[0097] 3, winding unit; 301, rack; 302, winding roller; 303, transition roller. DETAILED DESCRIPTION

[0098] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0099] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0100] Embodiment one

[0101] As Figure 1 shown, the present embodiment provides a production equipment of degradable film, comprising:

[0102] a plasticizing unit 1;

[0103] a forming unit 2 provided at the discharge end of the plasticizing unit 1;

[0104] a winding unit 3 provided at the discharge end of the forming unit 2;

[0105] The forming unit 2 comprises:

[0106] an outer flattening assembly 21 provided at the outside of the formed film;

[0107] a flattening assembly 22 for flattening the formed film, the flattening assembly 22 being provided at the side of the winding unit 3; and

[0108] a folding assembly 23 for supporting and flattening the cylindrical film, the folding assembly 23 being provided at the inside of the film;

[0109] After the film is plasticized and extruded by the plasticizing unit 1, it enters the forming unit 2 in the shape of a cylinder under the blowing action of the wind wheel. The outer flattening assembly 21 flattens the continuously fed film outside the cylinder-shaped film in a rotating manner around the outside of the cylinder-shaped film, and the flattened cylinder-shaped film is supported by the folding assembly 23 to be flat, and then passes through the flattening assembly 22 to be flattened and is wound at the winding unit 3.

[0110] It needs to be supplemented that the plasticizing unit 1 comprises:

[0111] an extrusion cavity 101;

[0112] a feeding hopper 102, which is connected to the upper end of the extrusion cavity 101;

[0113] a first driving mechanism 103, which is connected to the initial end of the extrusion cavity 101;

[0114] a discharging cavity 104, which is connected to the extrusion end of the extrusion cavity 101;

[0115] Preferably, the upper end of the discharging cavity 104 is provided with a protective cover 105;

[0116] The winding unit 3 comprises:

[0117] a frame 301;

[0118] a winding roller 302, which is rotatably connected inside the frame 301;

[0119] a transition roller 303, which is connected to the upper end of the frame 301 and is used for the transition of the formed film.

[0120] As an improvement, as shown in Figure 4 The outer scraping assembly 21 comprises:

[0121] a sleeve plate 211;

[0122] a first driven gear 212, which is rotatably connected inside the sleeve plate 211;

[0123] a gear ring 213, which is engaged on the side of the first driven gear 212 and is located inside the sleeve plate 211;

[0124] The upper and lower ends of the gear ring 213 are both connected with scraping plates 214;

[0125] The inside of the scraping plate 214 is rotatably connected with a scraping wheel 215, which is in contact with the outer surface of the cylindrical film;

[0126] The first driven gear 212 is fixedly sleeved outside the helical gear shaft 231.

[0127] As an improvement, as shown in Figures 2-3 The flattening assembly 22 comprises:

[0128] a support plate 221;

[0129] an inclined plate 222, which is provided on the upper part of the support plate 221 and is located at the film outlet.

[0130] A leveling mechanism 223 is connected to the upper end of the support plate 221 and located on the side of the inclined plate 222.

[0131] A-frame 224, rotatably connected to the lower part of the support plate 221 and located at the inlet of the membrane; and

[0132] The second drive mechanism 225 is connected to the front end of the support plate 221.

[0133] Furthermore, such as Figures 6-7 As shown, the scraping mechanism 223 has a first receiving cavity 2231 located on the right side inside;

[0134] The scraping mechanism 223 has a second receiving cavity 2232 located on the left side inside;

[0135] The first receiving cavity 2231 is rotatably connected to a reciprocating lead screw 2233;

[0136] Both sides of the reciprocating screw 2233 are provided with reciprocating rails 22331;

[0137] The reciprocating lead screw 2233 is provided with an eccentric rail 22332 in the middle of its outer side;

[0138] A first rotating wheel 22333 is sleeved on the outside of the reciprocating screw 2233 and located outside the scraping mechanism 223;

[0139] A second rotating wheel 22334 is connected to one end of the reciprocating lead screw 2233 and located outside the scraping mechanism 223;

[0140] The second rotating wheel 22334 is connected to the shaft of the second adjusting half gear 22423 via the second belt 223341;

[0141] The first rotating wheel 22333 is connected to the outside of the drive shaft of the second drive mechanism 225 via a first belt 223331;

[0142] The second drive mechanism 225 has a first helical gear 2251 connected to the end of its drive shaft;

[0143] The lower part of the first helical gear 2251 is engaged with the second helical gear 2311.

[0144] The first drive mechanism 103 and the second drive mechanism 225 are preferably drive motors.

[0145] Furthermore, the second receiving cavity 2232 is in communication with the first receiving cavity 2231;

[0146] The second accommodating cavity 2232 is internally slidably connected with a reciprocating swing block 2234;

[0147] Both sides of the reciprocating swing block 2234 are internally provided with slide rails 22341 corresponding to reciprocating rails 22331;

[0148] The slide rails 22341 are internally slidably connected with reciprocating swing rods 22343;

[0149] The reciprocating swing rods 22343 are laterally connected with smearing plates 22344;

[0150] The reciprocating swing block 2234 is laterally connected with push rods 22342 at positions corresponding to the eccentric rails 22332;

[0151] One end of the reciprocating swing block 2234 relative to the push rod 22342 is connected with a limiting rod 22345;

[0152] The limiting rod 22345 is slidably connected with the smearing mechanism 223 and externally sleeved with a first reset spring 22346.

[0153] As shown in Figure 6 The A-frame 224 is internally rotatably connected with multiple sets of guide rollers 2241;

[0154] The A-frame 224 is internally rotatably connected with adjustment rollers 2242 installed at the lower part of the support plate 221;

[0155] One end of the adjustment rollers 2242 is externally connected with adjustment gears 22421;

[0156] The adjustment gears 22421 are meshed with first adjustment half gears 22422 at the upper end;

[0157] The first adjustment half gears 22422 are connected with second adjustment half gears 22423 through a third belt 22424;

[0158] The gear distribution directions of the first adjustment half gears 22422 and the second adjustment half gears 22423 are opposite.

[0159] As an improvement, as shown in Figures 8-9 The folding assembly 23 comprises:

[0160] A helical gear shaft 231;

[0161] A third rotating wheel 232 connected at the lower end of the helical gear shaft 231;

[0162] An air outlet pipe 233 connected at the upper end of the plasticizing unit 1 and located inside the film;

[0163] A guide block 2331 is fixedly inserted into the air outlet pipe 233;

[0164] A lifting rod 2332 is slidably inserted into the guide block 2331;

[0165] The lifting rod 2332 is L-shaped and its bottom is located below the third rotating wheel 232;

[0166] The lower end of the third rotating wheel 232 is connected to a protrusion 2321.

[0167] Furthermore, such as Figures 9-12 As shown, the upper end of the air outlet pipe 233 is connected to a mounting bracket 2333;

[0168] Inclined rails 23331 are connected to both sides of the upper end of the mounting bracket 2333;

[0169] The lifting rod 2332 is slidably connected to the mounting bracket 2333;

[0170] A second return spring 23321 is sleeved on the outer side of the lifting rod 2332 and located at the upper end of the mounting bracket 2333;

[0171] A limiting plate 23322 is sleeved on the outer side of the lifting rod 2332, which is located on the upper end of the second reset spring 23321.

[0172] Furthermore, such as Figure 10 As shown, the mounting bracket 2333 has termination guide wheels 23332 connected to the upper sides of both sides;

[0173] The upper end of the lifting rod 2332 is connected to the lifting frame 2334;

[0174] The lifting frame 2334 is telescopic and has a thrust spring 23343 inserted inside;

[0175] The lifting frame 2334 is connected to a lifting block 23341 that cooperates with the inclined rail 23331 on its side;

[0176] The lifting block 23341 and the inclined rail 23331 are respectively set as the inclined surface 233411;

[0177] The lifting block 23341 is connected to an expansion guide wheel 23342 on its side.

[0178] It should be noted that, when using it, such as Figure 11As shown, the raw materials are put into the feeding hopper 102, and the materials enter the extrusion cavity 101 and are plasticized and extruded into the discharge cavity 104 by the first driving mechanism 103 and the screw in the extrusion cavity 101, and the discharge cavity 104 extrudes the plasticized materials into a cylindrical film by the die head arranged inside, and the wind blown by the wind wheel is discharged along the air outlet pipe 233 in the cylindrical film;

[0179] As shown in Figure 1 , Figures 4-5 , Figures 8-9 When the film is continuously extruded from the discharge cavity 104 and continuously extends upward under the action of the wind blown by the wind wheel, the second driving mechanism 225 is started, the second driving mechanism 225 drives the second bevel gear 2311 to rotate through the first bevel gear 2251, the second bevel gear 2311 drives the first driven gear 212 to rotate through the bevel gear shaft 231, and the scraper 214 rotates along the outer surface of the cylindrical film under the action of the flattening wheel 215 through the gear ring 213, so that the curvature of the cylindrical film at each position is consistent, thereby overcoming the situation that the surface curvature of the cylindrical film is inconsistent due to the uneven blowing speed of the film blowing wind, and improving the uniformity of the thickness of the cylindrical film.

[0180] As shown in Figure 1 , Figures 8-12 After ensuring that the curvature of the cylindrical film is consistent, the cylindrical film continues to feed upward and passes outside the mounting frame 2333, the bevel gear shaft 231 drives the third rotating wheel 232 to rotate while driving the first driven gear 212 to rotate, the third rotating wheel 232 drives the lifting rod 2332 to move downward along the guide block 2331 through the protruding part 2321, the lifting rod 2332 drives the lifting block 23341 to move obliquely downward along the inclined rail 23331 through the lifting frame 2334 under the action of the inclined surface 233411, so that the lifting block 23341 drives the expansion guide wheel 23342 to move obliquely downward and gradually expand the cylindrical film into an approximately sheet-shaped film, in this process, the thrust spring 23343 is gradually compressed, and under the action of the film continuously pulling upward, the film is expanded into a sheet-shaped film at the terminal guide wheel 23332, thereby achieving the gradual expansion of the cylindrical film into a sheet-shaped film from the inside, so that the film can be directly flattened from the position of each linear feeding during the subsequent flattening work, effectively overcoming the misalignment of the film during winding due to the uneven blowing speed during film blowing.

[0181] When the lifting block 23341 moves to the bottom of the inclined rail 23331, the bottom of the lifting rod 2332 is separated from the bottom of the protruding part 2321, and the lifting rod 2332 moves upward and drives the lifting frame 2334 to reset under the action of the second return spring 23321.

[0182] As Figures 1-2 、 Figures 5-6 shown, while the tubular film is gradually extruded into a sheet-like film, the second driving mechanism 225 drives the first rotating wheel 22333 to rotate through the first belt 223331, the first rotating wheel 22333 drives the second rotating wheel 22334 to rotate through the reciprocating screw rod 2233, the second rotating wheel 22334 drives the second adjusting half gear 22423 to rotate through the second belt 223341, the second adjusting half gear 22423 drives the A-frame 224 to gradually extrude the tubular film into a sheet-like film under the action of the adjusting roller 2242 through the adjusting gear 22421, and the A-frame 224 is matched with the expanding guide wheel 23342 to synchronously expand the tubular film outward, further avoiding the situation that the tubular film is wrinkled when it is processed into a sheet-like film, and improving the processing accuracy of the sheet-like film;

[0183] Wherein, when the teeth at the lower part of the second adjusting half gear 22423 are just disengaged from the adjusting gear 22421, the included angle of the A-frame 224 is the smallest at this time, and then the second adjusting half gear 22423 is disengaged from the adjusting gear 22421, at the same time, the second adjusting half gear 22423 drives the first adjusting half gear 22422 to rotate through the third belt 22424, the first adjusting half gear 22422 drives the adjusting gear 22421 to rotate reversely, so that the included angle of the A-frame 224 gradually increases, and the tubular film is processed into a sheet-like film through such reciprocating and the expanding guide wheel 23342;

[0184] As Figure 3 、 Figures 5-7 、 Figure 13As shown, the approaching sheet-like film continues to be pulled upwards by the winding roller 302 and passes the side of the smoothing plate 22344, at this time, the reciprocating screw rod 2233 not only drives the second rotating wheel 22334 to rotate, but also drives the push rod 22342 to push the reciprocating swing block 2234 to compress the first reset spring 22346 and move along the second containing cavity 2232 through the large-arc surface of the eccentric rail 22332, the reciprocating swing block 2234 drives the smoothing plate 22344 to move to contact the surface of the approaching sheet-like film through the reciprocating swing rod 22343, at the same time, the reciprocating screw rod 2233 drives the reciprocating swing rod 22343 to move along the slide rail 22341 through the first belt 223331, the reciprocating swing rod 22343 drives the smoothing plate 22344 to smooth the surface of the film from inside to outside along the film surface, until the small-arc surface of the eccentric rail 22332 reaches the second adjusting half gear 22423, the reciprocating swing block 2234 resets under the action of the first reset spring 22346 and at this time the smoothing plate 22344 is separated from the film surface, the reciprocating swing rod 22343 reversely moves along the slide rail 22341 under the action of the reciprocating rail 22331, so that the smoothing plate 22344 returns to the middle position of the film side again and performs the next smoothing work, after smoothing, the film is completely formed into a sheet under the tension of the transition roller 303 and is wound at the winding roller 302, so that the approaching sheet-like film is flattened before each time of flattening, the flattening effect is good and effectively prevents wrinkles from being generated during winding.

[0185] Embodiment two

[0186] As Figure 13 shown, the same or corresponding parts as in embodiment one are denoted by the same reference numerals, and for the sake of brevity, only the differences from embodiment one will be described below. The difference between this embodiment two and embodiment one is that:

[0187] A production device for degradable film is used for the method for producing degradable film, comprising the following steps:

[0188] Step one: plastic extrusion process, after the raw material enters the feeding hopper 102, it is extruded to the discharge cavity 104 through the extrusion cavity 101;

[0189] Step two: film blowing forming process, after the film in the discharge cavity 104 is discharged, it is blown out of the cylinder and continuously fed upwards under the action of the wind wheel;

[0190] Step three: film external smoothing process, the external scraping and smoothing assembly 21 rotates along the external part of the cylindrical film to smooth the external part of the film in the feeding state;

[0191] Step four: film internal flattening process, the folding assembly 23 located in the internal part of the cylindrical film makes up-down reciprocating motion to perform flattening treatment work on the cylindrical film;

[0192] Step five: film external flattening process, the flat assembly 22 reciprocating movement of the film after the flattening process to explore the work;

[0193] Step six: traction winding process, the winding unit 3 rotation of the film after the flattening process to explore the winding work.

[0194] It should be noted that the present application only through the driving action of the second drive mechanism 225 can realize the film external smoothing process, film internal flattening process, film external flattening process, good synchronization, and can cooperate with the continuity of the film feeding effect of automatic film from the cylindrical processing into the effect of no wrinkle flat.

[0195] The above only for the preferred embodiments of the present application, and not to limit the present application, any modification, equivalent replacement and improvement within the spirit and principles of the present application, etc., should be included in the scope of protection of the present application.

Claims

1. An apparatus for producing a degradable film, characterized by comprising: a film production device; a film stretching device; a film cooling device; a film winding device; and a film cutting device. include: Plasticizing unit; A molding unit is located at the discharge end of the plasticizing unit; A winding unit is located at the discharge end of the forming unit; The molding unit includes: An external leveling assembly is disposed on the outside of the formed film; A flattening assembly for flattening a formed film into a sheet shape; the flattening assembly is disposed on the side of the winding unit; and A folding assembly, used to flatten a cylindrical film, is disposed inside the film; After being plasticized and extruded by the plasticizing unit, the film enters the forming unit in a cylindrical shape under the blowing action of the impeller. The external flattening component smooths the continuously feeding film into a cylindrical shape by rotating around the outside of the cylindrical film. The cylindrical film, after being smoothed, is supported into a flat shape by the folding component, and then flattened by the flattening component and wound up at the winding unit. The flattening assembly includes: Support plate; An inclined plate is disposed on the upper part of the support plate and located at the film outlet; A leveling mechanism is connected to the upper end of the support plate and located on the side of the inclined plate; A-frame, rotatably connected to the lower part of the support plate and located at the inlet of the membrane; and A second drive mechanism is connected to the front end of the support plate; The scraping mechanism has a first receiving cavity on the right side inside; The scraping mechanism has a second receiving cavity on the left side inside; The first receiving cavity is rotatably connected to a reciprocating lead screw; Both sides of the reciprocating screw are equipped with reciprocating rails; The reciprocating screw is provided with an eccentric rail in the middle of its outer side; The second receiving cavity is in communication with the first receiving cavity; A reciprocating swing block is slidably inserted into the second receiving cavity; The reciprocating swing block has slide rails on both sides inside that correspond to the reciprocating rail; A reciprocating swing rod is slidably inserted inside the slide rail; A trowel plate is connected to the side of the reciprocating swing arm; A push rod is connected to the side of the reciprocating swing block at the position corresponding to the eccentric rail; The folding component includes: Helical gear shaft; The third rotating wheel is connected to the lower end of the helical gear shaft; An exhaust pipe is connected to the upper end of the plasticizing unit and located inside the film; A guide block is fixedly inserted inside the air outlet pipe; A lifting rod is slidably inserted inside the guide block; The lifting rod is L-shaped and its bottom is located below the third rotating wheel; The lower end of the third rotating wheel is connected to a protrusion; The upper end of the air outlet pipe is connected to a mounting bracket; Inclined rails are connected to both sides of the upper end of the mounting bracket; The lifting rod is slidably connected to the mounting frame; A second return spring is fitted on the outer side of the lifting rod and at the upper end of the mounting frame; A limiting plate is sleeved on the outside of the lifting rod, located at the upper end of the second reset spring; The mounting bracket has termination guide wheels connected to the upper sides of both sides; The upper end of the lifting rod is connected to a lifting frame; The lifting frame is telescopic and has a thrust spring inserted inside; The side of the lifting frame is connected to a lifting block that cooperates with the inclined rail; The area opposite the lifting block and the inclined rail is set as an inclined surface; The lifting block is connected to an expansion guide wheel on its side; The bevel gear shaft drives the first driven gear and the third rotating wheel, the third rotating wheel drives the lifting rod to move downward along the guide block through the protruding part, the lifting rod drives the lifting block to move downward along the inclined rail under the action of the inclined surface through the lifting frame, so that the lifting block drives the expansion guide wheel to move downward to gradually expand the cylindrical film into a sheet film.

2. The degradable film production equipment according to claim 1, characterized in that, The outer scraping assembly comprises: a cover plate; a first driven gear rotatably connected inside the cover plate; a gear ring engaged on the side of the first driven gear and located inside the cover plate; the upper and lower ends of the gear ring are connected with scraping plates; the scraping plates are rotatably connected with scraping wheels in contact with the outer surface of the cylindrical film.

3. The degradable film production equipment according to claim 2, characterized in that, a plurality of guide rollers are rotatably connected inside the A-frame; an adjusting roller is rotatably connected to the upper part of the A-frame and mounted on the lower part of the support plate; one end of the outer part of the two adjusting rollers is connected with an adjusting gear; the upper end of the adjusting gear is engaged with a first adjusting half gear; the first adjusting half gear is connected with a second adjusting half gear through a third belt; the gear distribution directions of the first adjusting half gear and the second adjusting half gear are opposite.

4. The method for producing a degradable film using the production apparatus for a degradable film according to claim 3, characterized by, The steps include: Step 1: Plastic extrusion process, the raw materials enter the feeding hopper and are extruded into the discharge cavity through the extrusion cavity; Step 2: Film blowing forming process, the film in the discharge cavity is blown out in a cylindrical shape and continuously fed upward under the action of the wind wheel after being discharged; Step 3: Film outer flattening process, the outer scraping assembly rotates along the outer part of the cylindrical film to flatten the outer part of the film in the feeding state; Step 4: Film internal flattening process, the folding assembly reciprocating inside the cylindrical film performs flattening treatment on the cylindrical film; Step 5: Film outer flattening process, the flattening assembly reciprocates to flatten the film after flattening treatment; Step 6: Traction and winding process, the winding unit rotates to wind the flattened film.

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