CN115570777A - Degradable nano antibacterial PE film blow molding device and working method thereof - Google Patents

Abstract

The invention discloses a blow molding device for a degradable nano antibacterial PE film and a working method thereof, wherein the blow molding device comprises an extrusion box and a film blowing box, the film blowing box is arranged on one side of the extrusion box, and a conveying pipe is fixedly arranged between the extrusion box and the film blowing box; the cooling air ring, its setting is in the top of blowing the membrane case, the top fixed mounting of cooling air ring has a section of thick bamboo of stabilizing, the upper end fixed mounting in the section of thick bamboo outside has cooling ring case, the upper end fixed mounting in the cooling ring case outside has circulation ring case, one side fixed mounting of circulation ring case has the cold air duct, one side fixed mounting of the outside lower extreme of cooling ring case has the outlet duct. It has realized the ability of stabilizing the diameter that cools off and restrict the bubble pipe to solved current device and carried out the blow molding in-process at the PE membrane, can not stabilize the diameter that cools off and restrict the bubble pipe to the bubble pipe, be unfavorable for the problem of the stability of PE membrane production thickness.

Description

Degradable nano antibacterial PE film blow molding device and working method thereof

Technical Field

The invention relates to the technical field of blow molding devices, in particular to a degradable nano antibacterial PE film blow molding device and a working method thereof.

Background

The PE film is a macromolecular organic compound with the simplest structure, is widely used, has continuously changed performance along with the gradual enhancement of the environmental protection meaning of people, has degradable antibacterial capacity by changing the raw material components, and is usually produced by blow molding by a blow molding device when the PE film is produced;

for example, patent No. CN217258369U (a film blow molding apparatus): the film blowing device comprises a working box, a material extruding device fixedly arranged on one side of the working box and a film blowing device fixedly arranged in the working box, wherein one end of the material extruding device is communicated with the film blowing device, and a cleaning mechanism is arranged at the top of the working box;

although the surface of the film is convenient to clean in the prior art, when the film is extruded into a bubble tube, the outer side is lack of a cooling structure, the film cannot be fully cooled, and the diameter of the bubble tube cannot be limited when the film is extruded and blown into the bubble tube, so that the bubble tube cannot be stably cooled and the diameter of the bubble tube cannot be limited in the blow molding process of the PE film, and the stability of the production thickness of the PE film is not facilitated; therefore, the market urgently needs to develop a degradable nano-antibacterial PE film blow molding device and a working method thereof to help people solve the existing problems.

Disclosure of Invention

The invention aims to provide a blow molding device for a degradable nano antibacterial PE film and a working method thereof, and aims to solve the problems that the existing device provided in the background art cannot stably cool a bubble tube and limit the diameter of the bubble tube in the process of blow molding the PE film, and is not beneficial to the stability of the production thickness of the PE film.

In order to achieve the purpose, the invention provides the following technical scheme: a blow molding device of a degradable nano antibacterial PE film, which comprises an extrusion box,

the film blowing box is arranged on one side of the extrusion box, and a conveying pipe is fixedly arranged between the extrusion box and the film blowing box;

the cooling air ring is arranged above the film blowing box, a stabilizing cylinder is fixedly mounted above the cooling air ring, a cooling ring box is fixedly mounted at the upper end of the outer side of the stabilizing cylinder, a circulating ring box is fixedly mounted at the upper end of the outer side of the cooling ring box, a cold air pipe is fixedly mounted at one side of the circulating ring box, and an air outlet pipe is fixedly mounted at one side of the lower end of the outer side of the cooling ring box.

Preferably, the lower extreme of a stabilizing cylinder lateral surface is provided with the exhaust hole, and the exhaust hole is provided with a plurality of, the exhaust hole is from outer to interior slope downward setting, the upper end fixed mounting of a stabilizing cylinder lateral surface has the temperature guide plate.

Preferably, the inside fixed mounting of conveyer pipe has the filter block, the inside of filter block is provided with pressure boost groove and flow hole respectively, and pressure boost groove and flow hole intercommunication, the one end of flow hole is provided with the filter, and the filter passes through screw fixed connection with the filter block, the outside fixed mounting of conveyer pipe has the dismouting board.

Preferably, an air inlet pipe is fixedly mounted below the film blowing box, a feeding cavity is arranged in the film blowing box and is communicated with the conveying pipe, and an air outlet is arranged in the film blowing box along the upper part of the feeding cavity and is communicated with the feeding cavity.

Preferably, the inside of the film blowing box is provided with a plurality of groups of air blowing holes, the air blowing holes are obliquely arranged, and the air blowing holes are communicated with the air inlet pipe.

Preferably, a fixing rod is fixedly installed in the middle of the upper portion of the film blowing box, a refrigerator is fixedly installed above the fixing rod, and a distribution box is fixedly installed above the refrigerator.

Preferably, the top fixed mounting who extrudes the case has the feeder hopper, the inside of extruding the case is provided with the heating ring chamber respectively and extrudes the chamber, and the heating ring chamber sets up in the outside of extruding the chamber, the inside in heating ring chamber is provided with the heater.

Preferably, the inside in extrusion chamber is provided with the hob, and the hob rotates with the extrusion case to be connected, one side fixed mounting of extrusion case has the motor, the below fixed mounting of extrusion case has the mounting bracket.

Preferably, a herringbone plate is arranged above the stabilizing cylinder, an installation frame is arranged above the herringbone plate, a traction roller is rotatably installed inside the installation frame along the upper side of the herringbone plate, a winding frame is fixedly installed on one side of the installation frame, and supporting legs are fixedly installed below the winding frame.

A working method of a blow molding device for degradable nano antibacterial PE films comprises the following steps:

step 1: mixing and adding the degradable nano antibacterial PE film production raw materials into an extrusion box, conveying the raw materials, and melting and mixing;

step 2: then the melting material is extruded into a conveying pipe, and when the melting material flows through a filter block, the melting material is pressurized and filtered, and impurities and coke materials in the melting material are removed;

and 3, step 3: then the melt is extruded into a film blowing box and is extruded into a bubble tube through an air outlet, and the air inlet pipe conveys compressed air to apply upward moving acting force on the bubble tube and blow the bubble tube to expand;

and 4, step 4: meanwhile, the cooling air ring is started to blow air upwards, the extruded bubble tube is assisted to move upwards, the bubble tube is cooled preliminarily from the outer side, the air pressure above the bubble tube is reduced due to the air flow, the bubble tube can be rapidly expanded, and the diameter of the bubble tube is stabilized under the action of the stabilizing cylinder;

and 5: then, cold air is conveyed to the cooling ring box and moves from top to bottom, and the bubble tube is fully cooled from the outer side, so that the thickness of the bubble tube is shaped;

step 6: and then flattening the bubble tube through a herringbone plate, placing the bubble tube between two traction rollers, and winding the PE film through a winding roller on a winding frame.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the arrangement of the stabilizing cylinder, the cooling air ring is arranged below the stabilizing cylinder, air is blown upwards through the cooling air ring, the extruded foam tube can be assisted to move upwards, the foam tube is initially cooled from the outer side, and under the action of the stabilizing cylinder, the air flow blown above the cooling air ring can reduce the air pressure above the foam tube, so that the foam tube can be rapidly expanded, the foam tube can be stably and uniformly expanded due to the influence of the upward blowing of the annular shape of the cooling air ring, the uniformity of the PE film thickness is improved, the diameter of the foam tube can be limited under the action of the stabilizing cylinder, the phenomenon that the diameter of the foam tube is too large due to the influence of excessive internal or external air flow on the foam tube is prevented, the uniformity of the PE film production thickness is facilitated, meanwhile, the cooling ring box is arranged above the outer side of the stabilizing cylinder, the cooling air moves downwards from the top of the cooling ring box, the foam tube can be sufficiently cooled from the outer side, the foam tube is shaped, the stability of the PE film production thickness is facilitated, the production quality of the PE film is improved, and the practicability of the blow molding device is improved.

2. According to the invention, through the arrangement of the conveying pipe, the filter block is arranged in the conveying pipe, the pressurizing groove and the flowing hole are respectively arranged in the filter block, when the molten material extruded by the extrusion box flows into the pressurizing groove, the internal pressure of the pressurizing groove is gradually increased under the action of gradually reducing the diameter of the pressurizing groove, so that the molten material is pressurized, then the pressurized molten material passes through the filter plate under the action of the filter plate, impurities and coke in the molten material are retained and removed, and the blow molding production quality of the PE film is improved.

Drawings

FIG. 1 is a front view of a blow molding device for degradable nano-antibacterial PE film according to the present invention;

FIG. 2 is a cross-sectional view of a stabilization cartridge of the present invention;

FIG. 3 is a cross-sectional view of an extrusion box of the present invention;

FIG. 4 is a cross-sectional view of a transfer tube and blown film box of the present invention;

FIG. 5 is a top view of the film blowing tank of the present invention.

In the figure: 1. an extrusion box; 2. a delivery pipe; 3. blowing a film box; 4. cooling the air ring; 5. a stabilizing cylinder; 6. cooling the ring box; 7. a flow-through loop box; 8. a cold air pipe; 9. a herringbone plate; 10. a mounting frame; 11. a traction roller; 12. a winding frame; 13. supporting legs; 14. an electric motor; 15. a feed hopper; 16. a mounting frame; 17. an air inlet pipe; 18. an exhaust hole; 19. an air outlet pipe; 20. a heat conducting plate; 21. a fixing rod; 22. a refrigerator; 23. a distribution box; 24. heating the ring cavity; 25. a heater; 26. an extrusion chamber; 27. a screw rod; 28. a filter block; 29. a pressurizing tank; 30. a flow aperture; 31. a filter plate; 32. disassembling the plate; 33. a gas blowing hole; 34. an air outlet; 35. a feed cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, an embodiment of the present invention is shown: a blow molding device for a degradable nano antibacterial PE film comprises an extrusion box 1 and a film blowing box 3, wherein the film blowing box 3 is arranged on one side of the extrusion box 1, and a conveying pipe 2 is fixedly arranged between the extrusion box 1 and the film blowing box 3, so that molten materials of raw materials for producing the degradable nano antibacterial PE film can be conveyed conveniently; cooling wind ring 4, it sets up the top at blown film case 3, the inside of cooling wind ring 4 is provided with the air exhauster, and the air outlet of cooling wind ring 4 sets up to the annular and is in the inside of stabilizing a section of thick bamboo 5, the top fixed mounting of cooling wind ring 4 has a stabilizing section of thick bamboo 5, the upper end fixed mounting outside stabilizing a section of thick bamboo 5 has cooling ring case 6, the upper end fixed mounting outside cooling ring case 6 has circulation ring case 7, the annular is provided with a plurality of air vent on the go-between face of circulation ring case 7 and cooling ring case 6, be convenient for the air conditioning in circulation ring case 7 evenly flows in cooling ring case 6, one side fixed mounting of circulation ring case 7 has air-conditioning pipe 8, air-conditioning pipe 8 external air conditioning supply equipment, one side fixed mounting of the outside lower extreme of cooling ring case 6 has outlet duct 19, thereby carry air conditioning through air-conditioning pipe 8, make air conditioning can from the top-down flow in cooling ring case 6, and then can carry out gradual cooling to the bubble pipe top-down, the homogeneity of bubble pipe cooling has been improved, be favorable to the blow molding production quality of PE membrane.

Referring to fig. 2, the lower end of the outer side surface of the stabilizing cylinder 5 is provided with a plurality of exhaust holes 18, the exhaust holes 18 are inclined downward from outside to inside, so that the exhaust holes 18 are inclined, the cooling air ring 4 can blow air out conveniently, the upper end of the outer side surface of the stabilizing cylinder 5 is fixedly provided with a temperature guide plate 20, the temperature guide plate 20 is a ring plate and is made of die-cast aluminum alloy, and the temperature guide plate has good temperature guide capability and is beneficial to cooling the bubble tube.

Referring to fig. 4, a filter block 28 is fixedly mounted inside the conveying pipe 2, a pressurizing groove 29 and a flow hole 30 are respectively formed inside the filter block 28, the diameter of the pressurizing groove 29 gradually decreases from left to right, the pressurizing groove 29 is communicated with the flow hole 30, and a filter plate 31 is arranged at one end of the flow hole 30, so that a molten material of a raw material for producing the degradable nano antibacterial PE film can be pressurized through the pressurizing groove 29, impurities and coke in the molten material are retained and removed under the action of the filter plate 31, the blow molding production quality of the PE film is improved, the filter plate 31 is fixedly connected with the filter block 28 through screws, a dismounting plate 32 is fixedly mounted outside the conveying pipe 2, and the dismounting and cleaning of the edge area filter plate 31 are improved in practicability through the arrangement of the dismounting plate 32.

Referring to fig. 2, 4 and 5, an air inlet pipe 17 is fixedly installed below the film blowing box 3, the air inlet pipe 17 is externally connected with an air compression device and is convenient for conveying compressed air into the air inlet pipe 17, a feeding cavity 35 is arranged inside the film blowing box 3, the feeding cavity 35 is communicated with the conveying pipe 2, an air outlet 34 is arranged inside the film blowing box 3 along the upper portion of the feeding cavity 35, the air outlet 34 is annular and is convenient for blowing molten material into a tube shape, the air outlet 34 is communicated with the feeding cavity 35, air blowing holes 33 are arranged inside the film blowing box 3, a plurality of groups of air blowing holes 33 are arranged, the air blowing holes 33 are obliquely arranged and are communicated with the air inlet pipe 17, a fixing rod 21 is fixedly installed in the middle of the upper portion of the film blowing box 3, a refrigerator 22 is fixedly installed above the fixing rod 21, and a distribution box 23 is fixedly installed above the refrigerator 22, so that cold air is cooled by the refrigerator 22 and then is emitted by the distribution box 23, and can be cooled from the inside and outside of the bubble tube, and the uniformity of cooling inside the bubble tube is improved.

Please refer to fig. 1 and fig. 3, a feeding hopper 15 is fixedly installed above the extrusion box 1, which facilitates the addition of the degradable nano-antibacterial PE film raw material, the inside of the extrusion box 1 is respectively provided with a heating ring cavity 24 and an extrusion cavity 26, and the heating ring cavity 24 is arranged outside the extrusion cavity 26, a heater 25 is arranged inside the heating ring cavity 24, the heater 25 is an electric heater, which can heat the PE film raw material, so that the PE film raw material is melted and mixed, which facilitates the blow molding production of the PE film, a screw rod 27 is arranged inside the extrusion cavity 26, and the screw rod 27 is rotatably connected with the extrusion box 1, a motor 14 is fixedly installed at one side of the extrusion box 1, the output end of the motor 14 is fixedly connected with the screw rod 27, thereby the screw rod 27 can be driven to rotate to convey the raw material by starting the motor 14, a feeding hopper 16 is fixedly installed below the extrusion box 1, and the stability of the extrusion box mounting rack is increased.

Referring to fig. 1, a herringbone plate 9 is arranged above a stabilizing cylinder 5, an installation frame 10 is arranged above the herringbone plate 9, two traction rollers 11 are rotatably installed inside the installation frame 10 along the upper side of the herringbone plate 9, and a driving motor of one traction roller 11 is arranged on the installation frame 10, so that a flattened bubble tube can be conveyed to move, a winding frame 12 is fixedly installed on one side of the installation frame 10, supporting legs 13 are fixedly installed below the winding frame 12, a winding roller is arranged inside the winding frame 12, and the driving motor of the winding roller is arranged on the front end face of the winding frame 12, so that the blow-molded degradable nano antibacterial PE film can be wound conveniently.

A working method of a blow molding device for a degradable nano antibacterial PE film comprises the following steps:

step 1: mixing and adding the degradable nano antibacterial PE film production raw materials into an extrusion box 1, conveying the raw materials, and melting and mixing;

and 2, step: then the melting material is extruded into the conveying pipe 2, and when the melting material flows through the filtering block 28, the melting material is pressurized and filtered, so that impurities and coke materials in the melting material are removed;

and 3, step 3: then the melt is extruded into the film blowing box 3 and is extruded into a bubble tube through an air outlet 34, and the air inlet pipe 17 conveys compressed air to apply upward acting force on the bubble tube and blow the bubble tube to expand;

and 4, step 4: meanwhile, the cooling air ring 4 is started to blow air upwards to assist the extruded bubble tube to move upwards and preliminarily cool the bubble tube from the outer side, and the air flow can cause the upper air pressure to be reduced, so that the bubble tube can be rapidly expanded, and the diameter of the bubble tube is stabilized under the action of the stabilizing cylinder 5;

and 5: then, cold air is conveyed to the cooling ring box 6, moves from top to bottom, and fully cools the bubble tube from the outer side, so that the thickness of the bubble tube is shaped;

step 6: then the bubble tube is flattened by a lambdoidal plate 9 and is placed between two traction rollers 11, and then the PE film is wound by a winding roller on a winding frame 12.

The working principle is as follows: when in use, degradable nano antibacterial PE film production raw materials are mixed and poured into the feed hopper 15, the motor 14 is started to drive the screw rod 27 to rotate, the raw materials are conveyed rightwards, the heater 25 is started simultaneously to melt and mix the conveyed raw materials, then the melt is extruded into the conveying pipe 2, when the melt flows through the filter block 28, along with the gradual reduction of the diameter of the pressurization tank 29, the internal pressure of the melt is gradually increased, then the pressurized melt is filtered under the action of the filter plate 31, impurities and coke in the melt are blocked and removed, the blow molding production quality of the PE film is improved, then the melt is extruded into the feed cavity 35 of the film blowing box 3 and is extruded into a bubble pipe through the blowing port 34, at the moment, a gas compression device externally connected with the air inlet pipe 17 is started to convey compressed air, the compressed air is sprayed out through the plurality of inclined blowing ports 33, and upward moving acting force is applied to the bubble pipe, blowing the bubble tube to expand, starting the cooling air ring 4 to blow upwards at the same time, assisting the extruded bubble tube to move upwards, primarily cooling the bubble tube from the outer side, reducing the upper air pressure due to the air flow blown above the cooling air ring 4, rapidly expanding the bubble tube, and being affected by the annular upward blowing of the cooling air ring, so that the bubble tube can be stably and uniformly expanded, improving the uniformity of the PE film thickness, then limiting the diameter of the bubble tube under the action of the stabilizing cylinder 5, preventing the bubble tube from being too large in diameter due to the excessive influence of the internal or external air flow, being beneficial to the uniformity of the PE film production thickness, then conveying cold air into the circulation ring box 7 through the cold air tube 8, then allowing the cold air to flow into the top of the cooling ring box 6 to move downwards, and fully cooling the bubble tube from the outer side through the temperature guiding function of the temperature guide plate 20, the thickness of the bubble tube is shaped, the stability of the production thickness of the PE film is facilitated, the production quality of the PE film is improved, then the bubble tube is flattened through the herringbone plate 9 and is placed between the two traction rollers 11, the bubble tube is conveyed under the rotation of the traction rollers 11, and then the PE film is wound through the winding rollers on the winding frame 12.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. The utility model provides an antibiotic PE membrane blow molding device of degradable nanometer, includes extrusion case (1), its characterized in that:

the film blowing box (3) is arranged on one side of the extrusion box (1), and a conveying pipe (2) is fixedly arranged between the extrusion box (1) and the film blowing box (3);

cooling wind ring (4), its top that sets up in blown film case (3), the top fixed mounting of cooling wind ring (4) has a section of thick bamboo of stabilizing (5), the upper end fixed mounting in a section of thick bamboo of stabilizing (5) outside has cooling ring case (6), the upper end fixed mounting in a cooling ring case (6) outside has circulation ring case (7), one side fixed mounting of circulation ring case (7) has cold air duct (8), one side fixed mounting of the outside lower extreme of cooling ring case (6) has outlet duct (19).

2. The blow molding device of degradable nano antibacterial PE film according to claim 1, characterized in that: the lower extreme of stabilizing a section of thick bamboo (5) lateral surface is provided with exhaust hole (18), and exhaust hole (18) are provided with a plurality of, exhaust hole (18) from outer to interior slope sets up downwards, the upper end fixed mounting of stabilizing a section of thick bamboo (5) lateral surface has temperature guide plate (20).

3. The blow molding device of degradable nano antibacterial PE film according to claim 1, characterized in that: the inside fixed mounting of conveyer pipe (2) has filter block (28), the inside of filter block (28) is provided with pressure boost groove (29) and flow hole (30) respectively, and pressure boost groove (29) and flow hole (30) intercommunication, the one end of flow hole (30) is provided with filter (31), and filter (31) and filter block (28) pass through screw fixed connection, the outside fixed mounting of conveyer pipe (2) has dismouting board (32).

4. The blow molding device of degradable nano antibacterial PE film according to claim 1, characterized in that: an air inlet pipe (17) is fixedly mounted below the film blowing box (3), a feeding cavity (35) is formed in the film blowing box (3), the feeding cavity (35) is communicated with the conveying pipe (2), an air outlet (34) is formed in the film blowing box (3) along the upper portion of the feeding cavity (35), and the air outlet (34) is communicated with the feeding cavity (35).

5. The blow molding device of degradable nano antibacterial PE film according to claim 4, characterized in that: the film blowing box (3) is internally provided with a plurality of groups of air blowing holes (33), the air blowing holes (33) are obliquely arranged, and the air blowing holes (33) are communicated with the air inlet pipe (17).

6. The blow molding device of degradable nano antibacterial PE film according to claim 5, characterized in that: the middle of the upper portion of the film blowing box (3) is fixedly provided with a fixing rod (21), the upper portion of the fixing rod (21) is fixedly provided with a refrigerator (22), and the upper portion of the refrigerator (22) is fixedly provided with a distribution box (23).

7. The blow molding device of degradable nano antibacterial PE film according to claim 1, characterized in that: the top fixed mounting who extrudes case (1) has feeder hopper (15), the inside of extruding case (1) is provided with heating ring chamber (24) respectively and extrudes chamber (26), and heating ring chamber (24) set up in the outside of extruding chamber (26), the inside of heating ring chamber (24) is provided with heater (25).

8. The blow molding device of degradable nano antibacterial PE film according to claim 7, characterized in that: extrude the inside in chamber (26) and be provided with hob (27), and hob (27) with extrude case (1) and rotate and be connected, one side fixed mounting who extrudes case (1) has motor (14), the below fixed mounting who extrudes case (1) has mounting bracket (16).

9. The blow molding device of degradable nano antibacterial PE film according to claim 1, characterized in that: a herringbone plate (9) is arranged above the stabilizing barrel (5), an installation frame (10) is arranged above the herringbone plate (9), a traction roller (11) is rotatably installed inside the installation frame (10) along the upper side of the herringbone plate (9), a winding frame (12) is fixedly installed on one side of the installation frame (10), and supporting legs (13) are fixedly installed below the winding frame (12).

10. An operating method of a blow molding device for a degradable nano antibacterial PE film is realized based on any one of claims 1 to 9, and is characterized by comprising the following steps:

step 1: mixing and adding the degradable nano antibacterial PE film production raw materials into an extrusion box (1), conveying the raw materials, and melting and mixing;

step 2: then the melting material is extruded into a conveying pipe (2), and when the melting material flows through a filtering block (28), the melting material is pressurized and filtered to remove impurities and coke materials in the melting material;

and step 3: then the melt is extruded into a film blowing box (3) and is extruded into a bubble tube through an air outlet (34), and the air inlet pipe (17) conveys compressed air to apply upward moving force on the bubble tube and blow the bubble tube to expand;

and 4, step 4: meanwhile, the cooling air ring (4) is started to blow air upwards to assist the extruded bubble tube to move upwards and preliminarily cool the bubble tube from the outer side, and the air flow can cause the air pressure above to be reduced, so that the bubble tube can be rapidly expanded, and the diameter of the bubble tube is stabilized under the action of the stabilizing cylinder (5);

and 5: then, cold air is conveyed to the cooling ring box (6), moves from top to bottom, and fully cools the bubble tube from the outer side, so that the thickness of the bubble tube is shaped;

and 6: then the bubble tube is flattened by a herringbone plate (9) and is placed between two traction rollers (11), and then the PE film is wound by a winding roller on a winding frame (12).

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