Anti-adhesion die penetrating threader

Abstract

The utility model provides a kind of anti-adhesion threading device, including fixed plate, guide pipe, fixed plate central place is equipped with bearing, and the inner ring of bearing is set in the one end of guide pipe, and the end that stretches out bearing is equipped with line collecting disc, and central through-hole and several yarn passing through hole are opened on line collecting disc;The inside of guide pipe has threading passage, and threading passage is constituted by first conical passage, first circular passage, second conical passage and second circular passage that are sequentially communicated, and the diameter of second circular passage is less than the diameter of first circular passage, and at least 2 air holes that are communicated with threading passage are opened on guide pipe.The device is arranged in front of the inlet of extruder head, and guide pipe is inserted into the inside of extrusion die in the head, and it is stretched out a certain distance from the head of extruder, so that during the process of outer sheath extrusion molding, empty pipe and its outside winding aramid yarn / polyester yarn all pass through the inside of guide pipe, to avoid the adhesion of inner tube and outer sheath and the phenomenon of outer sheath sticking yarn.

Description

Technical Field

[0001] This utility model belongs to the technical field of optical cable production, specifically relating to a threading device for preventing sticking. Background Technology

[0002] In the optical cable industry, hollow tube optical cables and sheathed optical cables account for a large proportion and are compatible with various splitters. Their structure, from the inside out, consists of an inner hollow tube, aramid / polyester yarn, and an outer sheath. The aramid / polyester yarn is wound around the inner hollow tube and does not adhere to either the inner hollow tube or the outer sheath. However, during the manufacturing process of hollow tube and sheathed optical cables, the following situations may occur: 1. Because the inner hollow tube and outer sheath are made of the same material or have the same physical properties, their softening temperatures are the same, which can cause adhesion between the inner and outer tubes; 2. Due to the plasticity of the outer sheath, yarn adhesion may occur. Therefore, an anti-adhesion threading device is designed. Summary of the Invention

[0003] This utility model provides a threading device to prevent sticking, which can solve the problems of sticking between inner and outer tubes and sticking yarn to the outer sheath.

[0004] The technical solution adopted in this utility model is as follows: A non-sticking thread-passing device includes a fixed plate and a guide tube. A bearing is centrally located on the fixed plate. One end of the guide tube is positioned within the inner ring of the bearing, allowing it to rotate with the inner ring. A yarn-passing disc extends from the bearing at this end of the guide tube. A central through-hole is formed in the center of the yarn-passing disc, and several yarn-passing holes are evenly distributed around the central through-hole. The guide tube has a thread-passing channel aligned with the central through-hole. This channel consists of a first conical channel, a first circular channel, a second conical channel, and a second circular channel connected sequentially. The diameter of the second circular channel is smaller than that of the first circular channel. At least two vent holes communicating with the thread-passing channel are provided on the guide tube, located on the corresponding sidewalls of the first circular channel or the second conical channel.

[0005] Preferably, the guide tube has a threaded connection on the outer side of one end extending from the bearing, and the cable tray has a connecting tube body with internal threads at one end near the guide tube. The cable tray is detachably mounted at the end of the guide tube through the connecting tube body, and a gasket is provided between the cable tray and the bearing.

[0006] Preferably, the guide tube includes a fixed part, a first conical transition part, a first circular guide part, a second conical transition part, and a second circular guide part connected in sequence. The fixed part is disposed in the inner ring of the bearing and extends out of the bearing. The outer diameter of the second circular guide part is smaller than the outer diameter of the first circular guide part. The first conical channel is located inside the fixed part, the first circular channel is located inside the first conical transition part and the first circular guide part, the second conical channel is located inside the second conical transition part, and the second circular channel is located inside the second circular guide part.

[0007] Preferably, the device also includes an adjustment mechanism that controls the up-and-down movement of the fixed plate. The adjustment mechanism includes a base plate, a portal frame disposed on the base plate, and a screw. The inner opposite sides of the portal frame are provided with slide rails. The two sides of the fixed plate are disposed in the slide rails and can slide up and down. The screw is movably disposed on the top of the fixed plate and passes upward through the top of the portal frame to connect to a handle. The screw is threadedly connected to the top of the portal frame.

[0008] Preferably, the system also includes a longitudinally arranged rectangular platform with at least two T-shaped slides along the front-to-back direction. The base plate of the adjustment mechanism is mounted on the top of the rectangle by T-bolts and nuts. Loosening the nuts allows the base plate to be moved to adjust its front-to-back position, while tightening the nuts locks the base plate to fix it to the top surface of the rectangular platform.

[0009] Preferably, the slide also includes a horizontally arranged dovetail groove slide, the top of which has a horizontally movable sliding platform, and the rectangular platform is fixed on the sliding platform.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This device is arranged in front of the extruder head inlet, and the guide tube extends into the extrusion mold inside the extruder head and extends a certain distance out of the extruder head, so that during the extrusion molding process of the outer sheath, the empty tube and the aramid yarn / polyester yarn wrapped around it both pass through the inside of the guide tube, avoiding the phenomenon of the inner tube sticking to the outer sheath and the outer sheath sticking to the yarn; at the same time, through the arrangement of the adjustment mechanism, the rectangular platform and the dovetail groove slide, the fixed plate can be adjusted up and down, back and forth and horizontally to ensure that the center line of the guide tube coincides with the center line of the extrusion mold. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of a preferred embodiment of the present invention.

[0013] Figure 3 for Figure 2 The left view.

[0014] In the diagram: 1. Fixing plate; 2. Bearing; 3. Guide tube; 4. Cable tray; 5. Vent hole; 6. Cable passage; 7. Adjustment mechanism; 8. Rectangular platform; 9. Dovetail groove slide; 10. Shim; 11. T-bolt; 12. Nut; 31. Fixing part; 311. Threaded connection part; 312. Smooth adapter part; 32. First conical transition part; 33. First circular guide part; 34. Second conical transition part; 35. Second... Circular guide section; 41. Central through hole; 42. Yarn through hole; 43. Connecting tube; 61. First conical channel; 62. First circular channel; 63. Second conical channel; 64. Second circular channel; 71. Base plate; 72. Door frame; 73. Screw; 74. Slide rail; 81. T-shaped slide rail; 91. Sliding table; 92. Base; 93. Bearing seat; 94. Screw; 95. Manual turntable; 96. Locking bolt. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides an anti-adhesion threading device, including a fixing plate 1 and a guide tube 3. A bearing 2 is disposed in the center of the fixing plate 1. One end of the guide tube 3 is disposed in the inner ring of the bearing 2, so that the guide tube can rotate with the inner ring of the bearing. A yarn feeding plate 4 is disposed at the end of the guide tube extending out of the bearing. A central through hole 41 is opened in the center of the yarn feeding plate 4. A plurality of yarn passing holes 42 are evenly opened around the central through hole on the yarn feeding plate 4. The guide tube 3 has a yarn passing channel 6 located on the same center line as the central through hole 41. The yarn passing channel 6 is composed of a first conical channel 61, a first circular channel 62, a second conical channel 63 and a second circular channel 64 connected in sequence. The diameter of the second circular channel 64 is smaller than the diameter of the first circular channel 62, so that the diameter of the yarn passing holes gradually decreases. At least two vent holes 5 are opened on the guide tube 3 and connected to the yarn passing channel. The vent holes 5 are opened on the corresponding side wall of the first circular channel 62 or the second conical channel 63. The interconnected first conical and first circular channels feature relatively large inner diameters, facilitating the entry of the hollow tube and aramid / polyester yarn onto the yarn feeding plate and ensuring the aramid / polyester yarn is evenly wound around the outside of the hollow tube. The inner diameters of the second conical and second circular channels gradually decrease, ensuring that the hollow tube and the aramid / polyester yarn wound around it are centered when exiting the yarn feeding channel. Vent holes ensure that the air pressure inside the guide tube is consistent with the air pressure outside, preventing vacuum formation inside the guide tube and thus deformation of the guide tube or even the hollow tube.

[0017] Given that the guide channel has a gradually decreasing inner diameter design, in order to adapt to the extrusion mold inside the die head and increase the strength of the guide tube, the guide tube 3 includes a fixed part 31, a first conical transition part 32, a first circular guide part 33, a second conical transition part 34, and a second circular guide part 35 connected in sequence. The fixed part 31 is located in the inner ring of the bearing and extends out of the bearing. The outer diameter of the second circular guide part 35 is smaller than the outer diameter of the first circular guide part 33, that is, the outer diameter of the guide tube is also gradually decreasing. The first conical channel 61 is located inside the fixed part 31, the first circular channel 62 is located inside the first conical transition part 32 and the first circular guide part 33, the second conical channel 63 is located inside the second conical transition part 34, and the second circular channel 64 is located inside the second circular guide part 35.

[0018] In use, the device is positioned in front of the extruder head inlet. The guide tube extends into the extrusion mold inside the extrusion head, with its centerline coinciding with the centerline of the extrusion mold, and extends outward a certain distance through the extruder head. Specifically, the first circular guide section, the second conical transition section, and a portion of the second circular guide section of the guide tube are located inside the extruder head. The empty tube passes through the central through-hole of the cable tray, and several aramid / polyester yarns pass through the surrounding yarn through-holes and are evenly wound around the empty tube. Then, the yarns are led out along with the empty tube through the yarn passage of the guide tube. It is known that the outer sheath is extruded through the extrusion mold. During this process, the empty tube and the aramid / polyester yarns wound around its outer side are both inside the guide tube, so there is no adhesion between the inner and outer tubes or yarn adhesion.

[0019] The guide tube is made of 304 or 316 stainless steel, which is resistant to high temperature and does not deform. Although it has good thermal conductivity, the empty tube passes through at a relatively fast speed, and the time it stays in the machine head is not enough for the empty tube to melt and deform.

[0020] In this embodiment, the cable tray and the guide tube are coupled as follows: the guide tube 3 has a threaded connection portion 311 on its outer side extending out of the bearing 2; the cable tray 4 has a connecting tube body 43 with internal threads on its outer side near the guide tube 3; the cable tray 4 is detachably mounted on the end of the guide tube via the connecting tube body 43; and a gasket 10 is provided between the cable tray 4 and the bearing 2. Specifically, the threaded connection portion 311 is located at the guide tube fixing portion 31; a smooth fitting portion 312 with an interference fit to the inner ring of the bearing is also provided on the outer side of the guide fixing portion 31. The outer diameter of the smooth fitting portion 312 is smaller than the outer diameter of the fixing portion 31, ensuring quick positioning when the guide tube is inserted into the inner ring of the bearing; the outer diameter of the threaded connection portion 311 is smaller than the outer diameter of the smooth fitting portion 312, facilitating the exit of the guide tube from the inner ring of the bearing at that end.

[0021] In a more recent embodiment, the device further includes an adjustment mechanism 7 capable of controlling the vertical movement of the fixed plate 1. The adjustment mechanism 7 includes a base plate 71, a portal frame 72 mounted on the base plate 71, and a screw 73. A slide rail 74 is provided on the inner opposite sides of the portal frame 71. The two sides of the fixed plate 1 are positioned within the slide rail 74 and can slide vertically. The screw 73 is movably mounted on the top of the fixed plate 1, allowing free circumferential rotation, and passes upward through the top of the portal frame 72 to connect to a handle. The screw 73 is threadedly connected to the top of the portal frame. Rotating the handle moves the screw up and down, causing the fixed plate to move upward or downward.

[0022] Furthermore, it also includes a longitudinally arranged rectangular platform 8, which has at least two T-shaped slides 81 along its front-to-back direction. The base plate 71 of the adjustment mechanism is mounted on the top of the rectangular platform 9 by T-bolts 11 and nuts 12. Loosening the nuts allows the base plate to be moved to adjust its front-to-back position, while tightening the nuts locks the base plate in place on the top surface of the rectangular platform. The front-to-back position of the adjustment mechanism can be adjusted via the rectangular platform, thereby adjusting the front-to-back position of the fixing plate and the guide tube.

[0023] In addition, it includes a horizontally arranged dovetail slide 9, the top of which has a horizontally movable sliding platform 91, and the rectangular platform 9 is fixed on the sliding platform 91. The left and right positions of the rectangular platform can be adjusted by the dovetail slide, thereby adjusting the left and right positions of the fixing plate and the guide tube, so as to facilitate the insertion of the guide tube into the extruder head mold.

[0024] In this embodiment, the dovetail groove slide is a prior art product, also known as a dovetail groove support plate linear slide or a linear single-axis slide. The structure differs slightly, and only one structure is described briefly. It consists of a base 92 and a sliding table 91. A dovetail guide rail is provided on the top of the base 92, and a rectangular groove is formed on the top surface of the dovetail guide rail. Bearing seats 93 with bearings are provided on the outer side of one end of the base 92 and within the rectangular groove. A screw 94 passes through the two bearing seats 93 at both ends, and has a manual turntable 95 at its outer end. The sliding table 91 is fitted onto the base 92 in conjunction with the dovetail guide rail. A nut is fixed to the bottom of the sliding table 91, and the nut is threaded onto the screw. A locking bolt 96 is also provided on one side of the sliding table 91. The position of the sliding table is adjusted by controlling the rotation of the screw via the manual turntable. After the position is determined, the sliding table is locked in place by the locking bolt on one side.

Claims

1. A thread-passing device for preventing adhesion, characterized in that: The device includes a fixing plate (1) and a guide tube (3). A bearing (2) is provided in the center of the fixing plate (1). One end of the guide tube (3) is located in the inner ring of the bearing (2), so that the guide tube can rotate with the inner ring of the bearing. A yarn feeding disc (4) is provided at the end of the guide tube extending out of the bearing. A central through hole (41) is provided in the center of the yarn feeding disc (4). Several yarn passing through holes (42) are evenly provided around the central through hole (41) on the yarn feeding disc (4). The inside of the guide tube (3) is in the same position as the central through hole (41). The centerline passage (6) is composed of a first conical channel (61), a first circular channel (62), a second conical channel (63) and a second circular channel (64) connected in sequence, and the diameter of the second circular channel (64) is smaller than the diameter of the first circular channel (62). The guide tube (3) is provided with at least two vent holes (5) connected to the passage (6), and the vent holes (5) are opened on the corresponding side wall of the first circular channel (62) or the second conical channel (63).

2. The anti-adhesion threading device according to claim 1, characterized in that: The guide tube (3) has a threaded connection part (311) on the outer side of one end extending out of the bearing. The cable tray (4) has a connecting tube body (43) with internal threads at one end near the guide tube (3). The cable tray (4) is detachably installed at the end of the guide tube through the connecting tube body (43). A gasket (10) is provided between the cable tray (4) and the bearing (2).

3. The anti-adhesion threading device according to claim 1, characterized in that: The guide tube (3) includes a fixed part (31), a first conical transition part (32), a first circular guide part (33), a second conical transition part (34), and a second circular guide part (35) connected in sequence. The fixed part (31) is disposed in the inner ring of the bearing and extends out of the bearing. The outer diameter of the second circular guide part (35) is smaller than the outer diameter of the first circular guide part (33). The first conical channel (61) is located inside the fixed part (31). The first circular channel (62) is located inside the first conical transition part (32) and the first circular guide part (33). The second conical channel (63) is located inside the second conical transition part (34). The second circular channel (64) is located inside the second circular guide part (35).

4. The anti-adhesion threading device according to claim 1, characterized in that: It also includes an adjustment mechanism (7) that can control the up and down movement of the fixed plate (1). The adjustment mechanism (7) includes a base plate (71), a gate frame (72) set on the base plate (71), and a screw (73). The inner opposite sides of the gate frame (72) are provided with slide rails (74). The two sides of the fixed plate (1) are set in the slide rails (74) and can slide up and down. The screw (73) is movably set on the top of the fixed plate (1) and passes through the top of the gate frame (72) to connect to a handle. The screw (73) is threadedly connected to the top of the gate frame (72).

5. The anti-adhesion threading device according to claim 4, characterized in that: It also includes a rectangular platform (8) arranged longitudinally, the rectangular platform (8) having at least two T-shaped slides (81) along the front and back direction, the base plate (71) of the adjustment mechanism is set on the top of the rectangular platform (8) by T-bolts (11) and nuts (12), loosening the nuts can move the base plate to adjust its front and back position, and tightening the nuts can lock the base plate to fix it on the top surface of the rectangular platform.

6. The anti-adhesion threading device according to claim 5, characterized in that: It also includes a horizontally arranged dovetail groove slide (9), the top of which has a horizontally movable sliding table (91), and the rectangular table (8) is fixed on the sliding table (91).

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