Yarn stretching and shaping device

Abstract

The utility model relates to a yarn stretching and shaping device, which belongs to the technical field of yarn processing equipment and comprises a shaping furnace body, a through hole, a wire conduit and a heating coil, one end of the shaping furnace body far away from the wire conduit is provided with at least one heating roller group, and each heating roller group is provided with three heating rollers. The bottoms of the two heating rollers on the lower portion are flush with the axis of the wire conduit, an inner hole is formed in the middle of each heating roller, the heating rollers are rotationally installed on the shaping furnace body, and a heating pipe is arranged in the inner hole of each heating roller. The yarn guide tube is arranged in the sizing furnace body, the heating coil is wound outside the yarn guide tube, primary heating sizing can be completed in the yarn guide tube, no less than one group of heating rollers are additionally arranged in the sizing furnace body, yarns are wound around the rollers, secondary heating sizing is performed on the yarns through the heating rollers, the heat sizing effect is better, and the production efficiency is improved. The heat setting efficiency is improved, and the dry heat shrinkage rate of the yarn is reduced.

Description

Technical Field

[0001] The utility model relates to a yarn stretching and shaping device, belonging to the technical field of yarn processing equipment. Background Art

[0002] The production of polytetrafluoroethylene fiber goes through multiple steps, such as raw material mixing, raw material maturation, embryo pressing, film pressing and degreasing, sintering and stretching, slitting and twisting, stretching and shaping, and finished product winding. At present, polytetrafluoroethylene fiber is stretched and shaped by a drawing furnace. The furnace body is equipped with an electric heating tube, which heats the air. Then the polytetrafluoroethylene fiber yarn passes straight through the furnace body for heating and shaping. However, the required heating time is long. If the polytetrafluoroethylene fiber is to be well shaped, the heating time of the fiber in the furnace needs to be extended. Slowing down the speed will reduce production efficiency if the production equipment remains unchanged, and replacing a longer furnace body will increase production costs. Utility Model Content

[0003] The utility model provides a yarn stretching and shaping device to solve the problems in the above-mentioned background technology.

[0004] The utility model relates to a yarn stretching and shaping device, comprising a shaping furnace body, wherein both left and right sides of the shaping furnace body are provided with perforations, a horizontal wire tube coaxial with the perforations is provided in the shaping furnace body, a heating coil is wound around the outside of the wire tube, and at least one group of heating roller groups is provided at one end of the shaping furnace body away from the wire tube, each group of heating roller groups is provided with three heating rollers, the bottoms of the two lower heating rollers are flush with the axis of the wire tube, the upper heating roller is located in the middle and upper position of the two lower heating rollers, an inner hole is provided in the middle of each heating roller, the heating roller is rotatably mounted on the shaping furnace body, and a heating tube is provided in the inner hole of each heating roller.

[0005] As a preferred embodiment, semicircular fixing sleeves are provided at both ends of the wire tube, connecting flanges are provided on the outer sides of both ends of the fixing sleeves, fastening bolts are provided on the connecting flanges, and a support rod is fixed to the bottom of the lower fixing sleeve, and the bottom of the support rod is fixed to the shaped furnace body, so that the wire tube can be easily installed and fixed.

[0006] As a preferred embodiment, openings are provided at both ends of the shaping furnace body, and left and right sealing plates are respectively provided on the outer sides of the openings on both sides to close them, and perforations are provided on the left and right sealing plates. A wire threading tube coaxial with the left perforation is provided on the outer side of the left perforation, and a bearing is fixed on the outer side of the wire threading tube. The bearing is installed in the mounting groove on the outer side of the perforation through a pressure cover. When the polytetrafluoroethylene fiber enters the shaping furnace body, it is transmitted from the wire threading tube. The wire threading tube is a rotating structure, which can prevent the polytetrafluoroethylene fiber from frequently contacting one position of the wire threading tube and causing wear of the wire threading tube.

[0007] As a preferred embodiment, a conductor roller 1 is provided on the outside of the wire threading tube, and the conductor roller 1 is installed on the left sealing plate. A conductor roller 2 is provided on the outside of the right perforation, and the conductor roller 2 is installed on the right sealing plate.

[0008] As a preferred embodiment, a wire wheel is provided at the right end of the wire tube, and a support seat is rotatably installed on the wire wheel. A mounting hole is provided on the support seat, and an adjusting screw is provided in the mounting hole. The bottom of the adjusting screw is fixed to the shaping furnace body, and locking nuts are provided on the upper and lower adjusting screws of the support seat. The wire wheel can guide the yarn passing through the limited wire tube to prevent the yarn from deviating in the front and rear directions.

[0009] As a preferred embodiment, a mounting sleeve is provided on the forming furnace body corresponding to the rear side of each heating roller. The heating roller is rotatably mounted on a support platform inside the mounting sleeve through bearing 2. A bearing cover is provided on the rear side of bearing 2 to press it. The rear end of the heating tube is fixed on the rear side wall of the bearing cover to facilitate the installation and disassembly of the heating roller.

[0010] As a preferred embodiment, a protective cover with the installation sleeve wrapped therein is provided on the rear side wall of the forming furnace body corresponding to each group of heating roller groups. The protective cover can better protect the components on the rear side of the heating rollers. Insulation layers are fixed on the inner walls of the protective cover, the forming furnace body, the left sealing plate and the right sealing plate for better insulation.

[0011] As a preferred embodiment, a maintenance port is provided on the front side of the shaped furnace body, and a detachable maintenance plate is provided on the outside of the maintenance port to close the maintenance port, so as to facilitate the first lead-in and subsequent maintenance.

[0012] The utility model has the following beneficial effects:

[0013] By arranging a wire tube in the shaping furnace body, with a heating coil wound around the outside of the wire tube, the initial heating and shaping can be completed in the wire tube, and at least one set of heating rollers is added in the shaping furnace body. The yarn passes around the rollers, and the yarn is heated and shaped for the second time by the heating rollers. The heat setting effect is better, the heat setting efficiency is improved, and the dry heat shrinkage rate of the yarn is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the internal main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the external main structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the side structure of the heating roller;

[0017] In the figure: 1. shaping furnace body; 2. insulation layer; 3. heating coil; 4. wire tube; 5. fixing jacket; 6. wire wheel; 7. adjusting screw; 8. heating roller; 9. right sealing plate; 10. heating tube; 11. wire roller 2; 12. punching; 13. wire threading tube; 14. wire roller 1; 15. left sealing plate; 16. mounting sleeve; 17. maintenance plate; 18. protective cover; 19. bearing cover; 20. bearing 2. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with embodiments.

[0019] Embodiment 1, as Figure 1-Figure 3 As shown, the utility model is a yarn stretching and shaping device, including a shaping furnace body 1, with perforations 12 on both sides of the shaping furnace body 1, a horizontal wire tube 4 coaxial with the perforation 12 is provided in the shaping furnace body 1, and a heating coil 3 is wound around the outside of the wire tube 4. The shaping furnace body 1 is provided with at least one set of heating roller groups at one end away from the wire tube 4, and each set of heating roller groups is provided with three heating rollers 8, the bottoms of the two lower heating rollers 8 are flush with the axis of the wire tube 4, and the upper heating roller 8 is located in the middle and upper position of the two lower heating rollers 8, and each heating roller 8 is provided with an inner hole in the middle, and the heating roller 8 is rotatably mounted on the shaping furnace body 1, and a heating tube 10 is provided in the inner hole of each heating roller 8. The heating roller 8 is made of stainless steel or chrome-plated steel with a mirror-polished surface.

[0020] During operation, the polytetrafluoroethylene fiber yarn enters from the perforation 12 at the left end, then passes into the wire tube 4, and then passes out from the right end of the wire tube 4, then the polytetrafluoroethylene fiber yarn passes around the heating roller 8 of the heating roller group, and then passes out from the perforation 12 at the right end. During stretching and shaping, the polytetrafluoroethylene fiber yarn entering the shaping furnace body 1 is first heated and shaped in the wire tube 4, and then the polytetrafluoroethylene fiber yarn moves to the heating roller 8 of the heating roller group for secondary shaping, so that the heat setting effect is better, the heat setting efficiency is improved, and the dry heat shrinkage rate of the yarn is reduced.

[0021] Embodiment 2, on the basis of embodiment 1, semicircular fixing jackets 5 are provided at both ends of the wire tube 4, connecting flanges are provided on the outer sides of both ends of the fixing jacket 5, and fastening bolts are provided on the connecting flanges, and a support rod is fixed to the bottom of the lower fixing jacket 5, and the bottom of the support rod is fixed to the shaping furnace body 1. A heat insulation layer is provided on the inner wall of the fixing jacket 5. When installing the wire tube 4, the two ends of the wire tube 4 can be fixed by the upper and lower two semicircular fixing jackets 5.

[0022] The left and right ends of the shaping furnace body 1 are provided with openings, and the outer sides of the openings on both sides are respectively provided with a left sealing plate 15 and a right sealing plate 9 to close them. The perforations 12 are arranged on the left sealing plate 15 and the right sealing plate 9. The outer side of the left perforation 12 is provided with a threading tube 13 coaxial therewith, and a bearing 1 is fixed to the outer side of the threading tube 13, and the bearing 1 is installed in the installation groove outside the perforation 12 through a gland. The heating tube 10 and the heating coil 3 are both electric air heating tubes. The heating coil 3 is heated by multiple sections independently controlled in the axial direction, and temperature sensors are arranged in the wire tube 4 and the heating roller 8 for convenient temperature control. The polytetrafluoroethylene fiber yarn is first inserted into the threading tube 13 before entering the perforation 12 at the left end.

[0023] A conductor roller 14 is provided on the outside of the threading tube 13 , and the conductor roller 14 is installed on the left sealing plate 15 . A conductor roller 2 11 is provided on the outside of the right perforation 12 , and the conductor roller 2 11 is installed on the right sealing plate 9 .

[0024] A guide wheel 6 is provided at the right end of the guide tube 4. The guide wheel 6 is rotatably mounted on a support seat. A mounting hole is provided on the support seat. An adjusting screw 7 is provided in the mounting hole. The bottom of the adjusting screw 7 is fixed to the shaping furnace body 1. Locking nuts are provided on the upper and lower adjusting screws 7 of the support seat. The outer wall of the guide wheel 6 is provided with an arc guide groove. The guide wheel 6 is made of ceramic material. Before working, the height position of the guide wheel 6 can be adjusted by adjusting the height position of the locking nut on the adjusting screw 7.

[0025] A mounting sleeve 16 is provided on the corresponding shaping furnace body 1 at the rear side of each heating roller 8. The heating roller 8 is rotatably mounted on the support platform in the mounting sleeve 16 through a bearing 20. A bearing cover 19 is provided at the rear side of the bearing 20 to press it. The rear end of the heating tube 10 is fixed on the rear side wall of the bearing cover 19. The bearing 20 is a high temperature resistant bearing, and the inner ring of the bearing 20 is interference fit with the rear end outer wall of the heating roller 8. The heating roller 8 can be easily installed and removed by removing the bearing cover 19 and then taking out the heating roller 8.

[0026] A protective cover 18 enclosing the mounting sleeve 16 is provided on the rear side wall of the shaping furnace body 1 corresponding to each set of heating roller groups, and an insulating layer 2 is fixed on the inner side walls of the protective cover 18, the shaping furnace body 1, the left sealing plate 15 and the right sealing plate 9.

[0027] A maintenance opening is provided on the front side of the shaping furnace body 1 , and a detachable maintenance plate 17 is provided on the outer side of the maintenance opening to close the maintenance opening.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0029] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

Claims

1. A yarn stretching and shaping device, comprising a shaping furnace body (1), wherein both left and right sides of the shaping furnace body (1) are provided with perforations (12), characterized in that: A horizontal wire tube (4) coaxial with the perforation (12) is arranged in the shaping furnace body (1), and a heating coil (3) is wound around the outside of the wire tube (4). At least one set of heating roller groups is arranged at one end of the shaping furnace body (1) away from the wire tube (4), and each set of heating roller groups is provided with three heating rollers (8). The bottoms of the two lower heating rollers (8) are flush with the axis of the wire tube (4), and the upper heating roller (8) is located in the middle and above the two lower heating rollers (8). An inner hole is arranged in the middle of each heating roller (8), and the heating rollers (8) are rotatably mounted on the shaping furnace body (1). A heating tube (10) is arranged in the inner hole of each heating roller (8).

2. A yarn stretching and shaping device according to claim 1, characterized in that: Semicircular fixing sleeves (5) are provided at both ends of the wire tube (4), connecting flanges are provided on the outer sides of both ends of the fixing sleeve (5), and fastening bolts are provided on the connecting flanges. A support rod is fixed to the bottom of the fixing sleeve (5) below, and the bottom of the support rod is fixed to the shaping furnace body (1).

3. A yarn stretching and shaping device according to claim 1, characterized in that: The shaping furnace body (1) is provided with openings at both left and right ends, and the outer sides of the openings on both sides are respectively provided with a left sealing plate (15) and a right sealing plate (9) for closing the openings. The through holes (12) are provided on the left sealing plate (15) and the right sealing plate (9). The outer side of the left through hole (12) is provided with a threading tube (13) coaxial therewith, and the outer side of the threading tube (13) is fixed with a bearing 1, and the bearing 1 is installed in a mounting groove on the outer side of the through hole (12) through a pressure cover.

4. A yarn stretching and shaping device according to claim 3, characterized in that: A first conductor roller (14) is provided on the outer side of the threading tube (13), and the first conductor roller (14) is mounted on the left sealing plate (15). A second conductor roller (11) is provided on the outer side of the right perforation (12), and the second conductor roller (11) is mounted on the right sealing plate (9).

5. The yarn stretching and shaping device according to claim 1, characterized in that: A guide wheel (6) is provided at the right end of the guide tube (4), and a support seat is rotatably mounted on the guide wheel (6). The support seat is provided with a mounting hole, and an adjusting screw (7) is provided in the mounting hole. The bottom of the adjusting screw (7) is fixed to the shaping furnace body (1), and locking nuts are provided on the upper and lower adjusting screws (7) of the support seat.

6. A yarn stretching and shaping device according to claim 3, characterized in that: A mounting sleeve (16) is provided on the shaping furnace body (1) corresponding to the rear side of each heating roller (8). The heating roller (8) is rotatably mounted on a support platform in the mounting sleeve (16) via a second bearing (20). A bearing cover (19) is provided on the rear side of the second bearing (20) to press against the second bearing (20). The rear end of the heating tube (10) is fixed to the rear side wall of the bearing cover (19).

7. A yarn stretching and shaping device according to claim 6, characterized in that: A protective cover (18) is provided on the rear side wall of the shaping furnace body (1) corresponding to each set of heated roller groups, and the protective cover (18), the shaping furnace body (1), the left sealing plate (15) and the right sealing plate (9) are all fixed with a heat-insulating layer (2) on the inner side walls.

8. The yarn stretching and shaping device according to claim 1, characterized in that: A maintenance opening is provided on the front side of the shaping furnace body (1), and a detachable maintenance plate (17) is provided on the outer side of the maintenance opening to seal the maintenance opening.

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