Extrusion equipment for degradable film production and use method thereof

Abstract

The invention discloses extrusion equipment for degradable film production and a use method thereof, and belongs to the technical field of degradable film production, the equipment comprises an extrusion cylinder, a melting cylinder, an extrusion seat, a fixed roller and a floating roller, an extrusion shaft is rotatably connected in the extrusion cylinder, and an extrusion blade is fixedly connected to the extrusion shaft; the bottom of the melting cylinder is connected with the extrusion cylinder through a feeding pipe, and a spiral heating wire is fixedly connected into a side plate of the melting cylinder. An extrusion cavity is formed in the extrusion seat and is in a three-section type; the degradable film extrusion device has the following beneficial effects that 1, the extrusion barrel is arranged to be conical, and the extrusion cavity is designed to be in a three-section type, so that the compaction degree can be improved, and the situation that pinholes and bubbles appear on a formed degradable film is avoided; and 2, the degradable film is finally formed through the shaping section, and the degradable film is cooled in a cold area at the position of the shaping section, so that the uniform thickness is ensured after the degradable film is formed. And 3, the formed degradable film is pulled out through the fixed roller and the floating roller which rotate oppositely.

Description

Technical Field

[0001] The invention relates to the technical field of degradable film production, and in particular to an extrusion device for producing a degradable film and a use method thereof. Background Art

[0002] Degradable film refers to a film that can undergo chemical structure changes and split and degrade through the action of microorganisms in soil and water or through ultraviolet rays in sunlight in the natural environment, and eventually re-enter the ecological environment in a reduced form. According to the degradation mechanism, it can be classified into photodegradable film, biodegradable film, and photo-controlled dual-degradable film.

[0003] Degradable films are generally formed by extruding molten plastic from a die plate through a screw extruder. The following problems exist: insufficient compaction during extrusion leads to pinholes or bubbles in the formed degradable film; and poor shaping effect of the die plate leads to uneven thickness of the formed degradable film. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an extrusion device for producing a degradable film and a method for using the same. The present invention is achieved through the following technical solutions.

[0005] An extrusion device for producing a degradable film, comprising: An extrusion barrel, wherein the extrusion barrel is horizontally arranged, the right end of the extrusion barrel is open, the center of the extrusion barrel is rotatably connected to an extrusion shaft, the extrusion shaft is fixedly connected to a spiral extrusion blade, the left end of the extrusion barrel is fixedly connected to a machine cover, an extrusion motor is fixedly connected in the machine cover, and the output shaft of the extrusion motor is butted with the left end of the extrusion shaft through a coupling; A melting cylinder, wherein the bottom of the melting cylinder is connected to the upper left of the extrusion cylinder through a feed pipe, a manual valve is fixedly connected to the feed pipe, a feeding pipe is fixedly connected to the top plate of the melting cylinder, and a spiral heating wire is fixedly connected to the side plate of the melting cylinder; An extrusion seat, wherein an extrusion cavity is provided in the extrusion seat, the right side of the extrusion cavity is open, and the left side of the extrusion cavity is butted against the right end of the extrusion cylinder; The fixed roller and the floating roller are located on the right side of the extrusion seat, and the floating roller and the fixed roller are respectively located on the upper and lower sides of the open end of the extrusion cavity.

[0006] Preferably, the extrusion barrel is in a tapered shape with a larger left side and a smaller right side.

[0007] Preferably, a sealing sleeve is provided at the center of the left side plate of the extrusion cylinder, the extrusion shaft is rotatably connected to the left side plate of the extrusion cylinder through the sealing sleeve, the right side of the inner cavity of the extrusion cylinder is fixedly connected to a swivel seat through support rods evenly arranged around the circumference, and the right end of the extrusion shaft is rotatably connected to the swivel seat.

[0008] Preferably, a stirring motor is fixedly connected to the top center of the melting cylinder, the output shaft of the stirring motor is connected to the stirring shaft via a coupling, and scrapers are evenly fixedly connected to the stirring shaft via a connecting rod.

[0009] Preferably, the extrusion chamber is a three-section type, which includes a feed section, a compression section and a forming section from left to right. The longitudinal width of the feed section increases from left to right, the vertical height of the compression section decreases from left to right, and the size of the forming section remains consistent.

[0010] Preferably, the position of the forming section in the extrusion seat is evenly and laterally provided with round-shaped cavities, and two adjacent round-shaped cavities are connected through connecting cavities that are staggered up and down. The upper and lower sides of the forming section are connected with the round-shaped cavity through a heat-conducting cavity. Thermally conductive silica gel and a copper plate are fixed in sequence in the heat-conducting cavity along the direction pointing to the forming section. A water inlet cavity and a reflux cavity are respectively provided on the upper part of the leftmost and rightmost round-shaped cavities. A water tank is fixed on the extrusion seat, and the water tank is used to hold cooling water. A water supply pipe is fixed on the top of the water tank, and a water pump is fixed on the right side of the water tank. The inlet of the water pump is connected to the water tank through a pumping pipe, and the outlet of the water pump is connected to the water inlet cavity through a water supply pipe, and the reflux cavity is connected to the top of the water tank through a reflux pipe.

[0011] Preferably, heat dissipation fins are evenly fixed laterally inside the front and rear side plates of the water tank, and two ends of the heat dissipation fins are respectively located inside and outside the water tank.

[0012] Preferably, the fixed roller is rotatably connected to the right side of the extrusion seat through a first rotating shaft that is symmetrical front and back, and two ends of the first rotating shaft are fixedly connected to a driving gear, and the extrusion seat is fixedly connected to a driving motor, and the output shaft of the driving motor and the first rotating shaft are fixedly connected to a first pulley, and the two first pulleys are linked by a first belt, and a telescopic suspension rod is symmetrically fixed to the right side of the extrusion seat front and back, and the bottom of the telescopic suspension rod is fixedly connected to a suspension seat, and the front and rear ends of the floating roller are fixedly connected to the second rotating shaft, and the second rotating shaft is rotatably connected to the suspension seat, and the front and rear sides of the extrusion seat are rotatably connected to a driven gear, and the driven gear is meshed with the driving gear, and the front and rear sides of the extrusion seat are fixedly connected to a guide rod through a pair of ear plates, and a slide seat is slidably connected to the guide rod, and a spring is sleeved on the guide rod on the right side of the slide seat, and the slide seat is rotatably connected to a second pulley, and the driven gear and the second rotating shaft are fixedly connected to a third pulley, and the two third pulleys and the second pulley are linked by a second belt.

[0013] Preferably, when the slide seat contacts the left ear plate, the spring is in a natural state.

[0014] A method for using an extrusion device for producing a degradable film comprises the following steps: S1, adding plastic particles into a melting barrel and melting them; S2, the molten plastic enters the extrusion seat through the extrusion barrel and is shaped and extruded into a degradable film through the extrusion cavity; S3, the fixed roller and the floating roller pull out the extruded degradable film.

[0015] The beneficial effects of the present invention are as follows: 1. The extrusion barrel is set to be conical, and the extrusion cavity is designed as a three-stage type, which can improve the compaction degree and avoid pinholes and bubbles in the biodegradable film after molding.

[0016] 2. The degradable film is finally formed through the shaping section, and is cooled in the cold zone at the shaping section to ensure that it has a consistent thickness after shaping.

[0017] 3. The formed biodegradable film is pulled out through the counter-rotating fixed roller and floating roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 : A schematic structural diagram of an extrusion device for producing a degradable film according to the present invention; Figure 2 : A schematic structural diagram of the melting tube of the present invention; Figure 3 : A three-dimensional schematic diagram of the extrusion seat of the present invention; Figure 4 : A schematic diagram of driving the fixed roller and the floating roller of the present invention; Figure 5 : A half-section view of the extrusion seat of the present invention; Figure 6 : Figure 1 A partial enlarged view of point A shown; Figure 7 : A longitudinal cross-sectional view of the position of the circular cavity described in the present invention.

[0020] The reference numerals are as follows: 1-extrusion barrel, 11-extrusion shaft, 12-extrusion blade, 13-machine cover, 14-extrusion motor, 15-sealing sleeve, 16-support rod, 17-rotating seat, 2-melting barrel, 21-feeding pipe, 22-manual valve, 23-feeding pipe, 24-heating wire, 25-stirring motor, 26-stirring shaft, 27-connecting rod, 28-scraper, 3-extrusion seat, 31-extrusion cavity, 3101-feeding section, 3102-compression section, 3103-forming section, 41-fixed roller, 42-floating roller, 43-first rotating shaft, 44-driving gear, 45-driving motor, 46-first Pulley, 47-first belt, 48-telescopic suspension rod, 49-suspension seat, 410-second rotating shaft, 411-driven gear, 412-guide rod, 413-sliding seat, 414-spring, 415-second pulley, 416-third pulley, 417-second belt, 418-ear plate, 51-circular cavity, 52-connecting cavity, 53-thermal conductive silica gel, 54-copper plate, 55-water inlet cavity, 56-reflux cavity, 57-water tank, 58-water supply pipe, 59-water pump, 510-water suction pipe, 511-water supply pipe, 512-reflux pipe, 513-heat dissipation fins, 514-thermal conduction cavity. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1-7 As shown, an extrusion device for producing a degradable film comprises: An extrusion barrel 1 is horizontally arranged, the right end of the extrusion barrel 1 is open, the center of the extrusion barrel 1 is rotatably connected to an extrusion shaft 11, a spiral extrusion blade 12 is fixedly connected to the extrusion shaft 11, the left end of the extrusion barrel 1 is fixedly connected to a cover 13, an extrusion motor 14 is fixedly connected inside the cover 13, and the output shaft of the extrusion motor 14 is butt-jointed with the left end of the extrusion shaft 11 through a coupling; A melting cylinder 2, the bottom of which is connected to the upper left of the extrusion cylinder 1 through a feed pipe 21, a manual valve 22 is fixedly connected to the feed pipe 21, a feeding pipe 23 is fixedly connected to the top plate of the melting cylinder 2, and a spiral heating wire 24 is fixedly connected to the side plate of the melting cylinder 2; An extrusion seat 3, wherein an extrusion cavity 31 is provided in the extrusion seat 3, the right side of the extrusion cavity 31 is open, and the left side of the extrusion cavity 31 is butted against the right end of the extrusion cylinder 1; The fixed roller 41 and the floating roller 42 are located on the right side of the extrusion seat 3 , and the floating roller 42 and the fixed roller 41 are located on the upper and lower sides of the open end of the extrusion cavity 31 respectively.

[0023] Furthermore, the extrusion cylinder 1 is in a tapered shape with a larger left side and a smaller right side.

[0024] Furthermore, a sealing sleeve 15 is provided at the center of the left side plate of the extrusion cylinder 1, and the extrusion shaft 11 is rotatably connected to the left side plate of the extrusion cylinder 1 through the sealing sleeve 15. The right side of the inner cavity of the extrusion cylinder 1 is fixedly connected with a swivel seat 17 through support rods 16 evenly arranged around the circumference, and the right end of the extrusion shaft 11 is rotatably connected to the swivel seat 17.

[0025] Furthermore, a stirring motor 25 is fixedly connected to the top center of the melting cylinder 2 , and the output shaft of the stirring motor 25 is connected to a stirring shaft 26 via a coupling, and a scraper 28 is evenly fixedly connected to the stirring shaft 26 via a connecting rod 27 .

[0026] Furthermore, the extrusion chamber 31 is a three-section type, which includes a feed section 3101, a compression section 3102 and a shaping section 3103 from left to right. The longitudinal width of the feed section 3101 increases from left to right, the vertical height of the compression section 3102 decreases from left to right, and the size of the shaping section 3103 remains consistent.

[0027] Furthermore, roundabout cavities 51 are evenly and laterally opened at positions corresponding to the shaping sections 3103 in the extrusion seat 3, and two adjacent roundabout cavities 51 are connected via connecting cavities 52 that are staggered up and down. The upper and lower sides of the shaping section 3103 are connected to the roundabout cavities 51 via a heat conduction cavity 514, and heat-conducting silica gel 53 and copper plates 54 are fixedly connected in sequence in the heat conduction cavity 514 along the direction pointing to the shaping section 3103. A water inlet cavity 55 and a reflux cavity 56 are respectively opened at the upper parts of the leftmost and rightmost roundabout cavities 51. A water tank 57 is fixedly connected to the extrusion seat 3, and the water tank 57 is used to hold cooling water. A water supply pipe 58 is fixedly connected to the top of the water tank 57, and a water pump 59 is fixedly connected to the right side of the water tank 57. The inlet of the water pump 59 is connected to the water tank 57 via a pumping pipe 510, and the outlet of the water pump 59 is connected to the water inlet cavity 55 via a water supply pipe 511, and the reflux cavity 56 is connected to the top of the water tank 57 via a reflux pipe 512.

[0028] Furthermore, heat dissipation fins 513 are evenly fixed in the front and rear side plates of the water tank 57 in a transverse direction, and two ends of the heat dissipation fins 513 are respectively located inside and outside the water tank 57 .

[0029] Furthermore, the fixed roller 41 is rotatably connected to the right side of the extrusion seat 3 through a first rotating shaft 43 that is symmetrical in front and back, and driving gears 44 are fixedly connected to both ends of the first rotating shaft 43. A driving motor 45 is fixedly connected to the extrusion seat 3, and a first pulley 46 is fixedly connected to the output shaft of the driving motor 45 and the first rotating shaft 43. The two first pulleys 46 are linked by a first belt 47. A telescopic suspension rod 48 is symmetrically fixedly connected to the right side of the extrusion seat 3, and a suspension seat 49 is fixedly connected to the bottom of the telescopic suspension rod 48. The front and rear ends of the floating roller 42 are fixedly connected to a second rotating shaft 410, and the second rotating shaft 410 is rotatably connected to the suspension seat 49. In the seat 49, the front and rear sides of the extrusion seat 3 are rotatably connected with a driven gear 411, the driven gear 411 is meshed with the driving gear 44, the front and rear sides of the extrusion seat 3 are fixedly connected with a guide rod 412 through a pair of ear plates 418, the guide rod 412 is slidably connected with a slide 413, a spring 414 is sleeved on the guide rod 412 on the right side of the slide 413, the slide 413 is rotatably connected with a second pulley 415, the driven gear 411 and the second rotating shaft 410 are fixedly connected with a third pulley 416, and the two third pulleys 416 and the second pulley 415 are linked by a second belt 417.

[0030] Furthermore, when the slide seat 413 contacts the left ear plate 418, the spring 414 is in a natural state.

[0031] A method for using an extrusion device for producing a degradable film comprises the following steps: S1, adding plastic particles into the melting barrel 2 and melting them.

[0032] like Figure 1-Figure 2 As shown, plastic particles are added to the melting cylinder 2 through the feeding tube 23, and the heating wire 24 and the stirring motor 25 are started. The heating wire 24 heats and melts the plastic particles, and the stirring motor 25 drives the stirring shaft 26 and the scraper 28 to rotate to stir the plastic particles, so that the heating is more uniform and the melting speed is increased. The scraper 28 can scrape off the plastic adhered to the side wall of the melting cylinder 2 to avoid the phenomenon of wall hanging.

[0033] S2, the molten plastic enters the extrusion seat 3 through the extrusion barrel 1, and is shaped and extruded into a degradable film through the extrusion cavity 31.

[0034] like Figure 1-Figure 2 As shown, after the plastic is melted, the manual valve 22 is opened, and the molten plastic enters the extrusion barrel 1 through the feed pipe 21. When the extrusion motor 14 is working, it drives the extrusion shaft 11 and the extrusion blades 12 to rotate, thereby transporting the plastic from left to right. The extrusion barrel 1 is a cone with a larger left side and a smaller right side, so that the space for accommodating the plastic is continuously reduced, thereby improving the compaction degree of the plastic.

[0035] The molten plastic enters the extrusion cavity 31, first enters the compression section 3102 in the feeding section 3101, is continuously compressed by the compression section 3102, and then is extruded from the shaping section 3103, so that the formed film has the required thickness.

[0036] like Figure 1 as well as Figure 5-Figure 7 As shown, the water pump 59 pumps water to make it flow in the circular cavity 51, and the water returns to the water tank 57 through the reflux pipe 512. The setting of the heat dissipation fins 513 can dissipate the heat of the cooling water. In the shaping section 3103, the heat of the degradable film is transferred to the circular cavity 51 through the copper plate 54 and the thermal conductive silica gel 53, and the heat is taken away by the flowing water, thereby continuously cooling the degradable film.

[0037] S3, the fixed roller 41 and the floating roller 42 pull out the extruded degradable film.

[0038] The shaped and cooled degradable film is discharged from the right end of the extrusion chamber 31. Figure 3-Figure 4 As shown, under the action of the spring 414, the second belt 417 is tensioned and the floating roller 42 has downward pressure.

[0039] The driving motor 45 drives the first rotating shaft 43 and the fixed roller 41 to rotate through the first pulley 46 and the first belt 47, and the driving gear 44 rotates with the first rotating shaft 43, and then the driven gear 411 rotates, so that under the action of the second pulley 415, the third pulley 416 and the second belt 417, the floating roller 42 rotates, and the floating roller 42 and the fixed roller 41 rotate in opposite directions. The direction of the driving motor 45 is set so that the fixed roller 41 rotates clockwise, and the floating roller 42 rotates counterclockwise, so that the formed biodegradable film is pulled out.

[0040] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An extrusion device for producing a degradable film, characterized in that: include: An extrusion barrel, wherein the extrusion barrel is horizontally arranged, the right end of the extrusion barrel is open, the center of the extrusion barrel is rotatably connected to an extrusion shaft, the extrusion shaft is fixedly connected to a spiral extrusion blade, the left end of the extrusion barrel is fixedly connected to a machine cover, an extrusion motor is fixedly connected in the machine cover, and the output shaft of the extrusion motor is butted with the left end of the extrusion shaft through a coupling; A melting cylinder, wherein the bottom of the melting cylinder is connected to the upper left of the extrusion cylinder through a feed pipe, a manual valve is fixedly connected to the feed pipe, a feeding pipe is fixedly connected to the top plate of the melting cylinder, and a spiral heating wire is fixedly connected to the side plate of the melting cylinder; An extrusion seat, wherein an extrusion cavity is provided in the extrusion seat, the right side of the extrusion cavity is open, and the left side of the extrusion cavity is butted against the right end of the extrusion cylinder; The fixed roller and the floating roller are located on the right side of the extrusion seat, and the floating roller and the fixed roller are respectively located on the upper and lower sides of the open end of the extrusion cavity.

2. An extrusion device for producing a degradable film according to claim 1, characterized in that: The extrusion barrel is in a tapered shape with a larger left side and a smaller right side.

3. An extrusion device for producing a degradable film according to claim 1, characterized in that: A sealing sleeve is provided at the center of the left side plate of the extrusion cylinder, and the extrusion shaft is rotatably connected to the left side plate of the extrusion cylinder through the sealing sleeve. A swivel seat is fixedly connected to the right side of the inner cavity of the extrusion cylinder through support rods evenly arranged around the circumference, and the right end of the extrusion shaft is rotatably connected to the swivel seat.

4. An extrusion device for producing a degradable film according to claim 1, characterized in that: A stirring motor is fixedly connected to the top center of the melting cylinder, and the output shaft of the stirring motor is connected to the stirring shaft through a coupling, and scrapers are evenly fixedly connected to the stirring shaft through a connecting rod.

5. The extrusion equipment for producing a degradable film according to claim 1, characterized in that: The extrusion chamber is a three-section type, which includes a feed section, a compression section and a shaping section from left to right. The longitudinal width of the feed section increases from left to right, the vertical height of the compression section decreases from left to right, and the size of the shaping section remains consistent.

6. An extrusion device for producing a degradable film according to claim 5, characterized in that: The positions of the extrusion seat corresponding to the shaping sections are uniformly provided with circular cavities in the transverse direction, and two adjacent circular cavities are connected by connecting cavities staggered up and down. The upper and lower sides of the shaping section are connected with the circular cavities through the heat conduction cavity. Thermal conductive silica gel and copper plates are fixedly connected in sequence in the heat conduction cavity along the direction pointing to the shaping section. The upper parts of the leftmost and rightmost circular cavities are respectively provided with a water inlet cavity and a reflux cavity. A water tank is fixedly connected to the extrusion seat, and the water tank is used to hold cooling water. A water supply pipe is fixedly connected to the top of the water tank, and a water pump is fixedly connected to the right side of the water tank. The inlet of the water pump is connected to the water tank through a pumping pipe, and the outlet of the water pump is connected to the water inlet cavity through a water supply pipe, and the reflux cavity is connected to the top of the water tank through a reflux pipe.

7. An extrusion device for producing a degradable film according to claim 6, characterized in that: The front and rear side plates of the water tank are evenly and laterally fixed with heat dissipation fins, and the two ends of the heat dissipation fins are respectively located inside and outside the water tank.

8. The extrusion equipment for producing a degradable film according to claim 1, characterized in that: The fixed roller is rotatably connected to the right side of the extrusion seat through a first rotating shaft that is symmetrical front and back, and two ends of the first rotating shaft are fixedly connected to a driving gear. The extrusion seat is fixedly connected to a driving motor, and the output shaft of the driving motor and the first rotating shaft are fixedly connected to a first pulley. The two first pulleys are linked by a first belt. A telescopic boom is symmetrically fixed to the right side of the extrusion seat front and back, and the bottom of the telescopic boom is fixedly connected to a hanging seat. The front and rear ends of the floating roller are fixedly connected to a second rotating shaft, and the second rotating shaft is rotatably connected to the hanging seat. The front and rear sides of the extrusion seat are rotatably connected to a driven gear, and the driven gear is meshed with the driving gear. The front and rear sides of the extrusion seat are fixedly connected to guide rods through a pair of ear plates, and a slide seat is slidably connected to the guide rod. A spring is sleeved on the guide rod on the right side of the slide seat, and the slide seat is rotatably connected to a second pulley, and the driven gear and the second rotating shaft are fixedly connected to a third pulley, and the two third pulleys and the second pulley are linked by a second belt.

9. An extrusion device for producing a degradable film according to claim 8, characterized in that: When the slide seat contacts the left ear plate, the spring is in a natural state.

10. A method for using an extrusion device for producing a degradable film, which is implemented based on the extrusion device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, adding plastic particles into a melting barrel and melting them; S2, the molten plastic enters the extrusion seat through the extrusion barrel and is shaped and extruded into a degradable film through the extrusion cavity; S3, the fixed roller and the floating roller pull out the extruded degradable film.

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