Polyester pre-oriented yarn (POY) filament superfine stretching device

Abstract

The utility model designs a cooling blowing device which is stable and mild in airflow and is matched with the stretching of filaments aiming at the primary cooling between the existing spinneret plate and the stretching of the guide roller, commonly used crosswind cooling, and the situation that the fine denier filaments are easy to blow off due to the large surface area of the fine denier filaments. The utility model provides a polyester pre-oriented yarn (POY) filament superfine stretching device, which comprises a plate body, a plurality of annular cooling devices, a plurality of guide rollers and a plurality of stretching rollers, wherein cooling airflow of the annular cooling device is provided by an external fan; a molten silk thread extruded by the spinneret plate penetrates through the ring type cooling device, is guided into a stretching structure consisting of a plurality of stretching rollers by one guide roller, and is guided out of the device by the other guide roller; the annular cooling device at least comprises an air inlet structure arranged on the periphery, and the air inlet structure serves as a support at the same time and is detachably connected with the plate body.

Description

Technical Field

[0001] This utility model relates to the field of spinning production, specifically to a POY filament ultrafine stretching device. Background Technology

[0002] POY (Partially Oriented Yarn): This type of yarn is formed when the fibers are only partially oriented during the drafting process. When producing fine denier yarns, conventional side-blowing cooling methods often fail to ensure consistent cooling between the inner and outer layers, leading to yarn breakage and disrupting production. Before filament stretching, a preliminary cooling process is necessary to stabilize the temperature for easier stretching. This requires a cooling system with stable and gentle airflow. The pre-cooled melt then enters the guide rollers before stretching. Summary of the Invention

[0003] This invention addresses the issue of existing methods for initial cooling between the spinneret and the guide rollers during the stretching process. While side-air cooling is commonly used, it can easily cause breakage of fine denier filaments due to their large surface area. Therefore, a cooling airflow device with stable and gentle airflow is designed and adapted for filament stretching. This invention provides a POY filament ultra-fine stretching device, comprising: a plate vertically positioned below the spinneret, and several annular cooling devices, guide rollers, and stretching rollers arranged on the plate.

[0004] The cooling airflow for the annular cooling device is provided by an external fan;

[0005] The molten filaments extruded from the spinneret pass through the annular cooling device, are guided by a guide roller into the stretching structure composed of several stretching rollers, and are then exited from the device via another guide roller.

[0006] The annular cooling device includes at least one air intake structure located on the outer periphery, which also serves as a support and is detachably connected to the plate.

[0007] The fan forces airflow into the annular cooling device through a duct. As the airflow passes through the intake structure, it slows down and carries away some heat due to expansion, allowing the room temperature fan to provide airflow below room temperature. The airflow is then blown annularly onto the molten filaments in the inner ring of the annular cooling device for initial filament shaping.

[0008] As a preferred embodiment, the annular cooling device includes: an outer cylinder with a removable and sealable annular top cover, and an inner cylinder concentrically fitted inside;

[0009] The inner cylinder wall is provided with an array of through holes;

[0010] A spacer structure is provided between the air intake structure and the inner cylinder;

[0011] The partition structure is set in an arc shape between the inner cylinder and the inner cylinder. The unfolded plane of the partition structure is triangular, and the apex of the partition structure is detachably connected to the air intake structure.

[0012] The spacer structure can further slow down the airflow and prevent the airflow pressure blowing out of the inner cylinder from being too high.

[0013] When setting up the inner cylinder and the partition structure, an annular sealing ring is first installed on the bottom surface of the outer cylinder, and then the inner cylinder is fitted on top. This not only reduces vibration but also further seals the surface. The top cover of the outer cylinder contains two sealing rings, one inner and one outer. The inner ring corresponds to the inner cylinder, and the outer ring corresponds to the outer cylinder.

[0014] The outer cylinder is 230mm long, and the diameter difference between the inner and outer cylinders is 20mm.

[0015] To facilitate the installation and fixation of the partition structure, the apex and base corners of the triangle of the partition structure are chamfered to remove the acute angles. An L-shaped hook extends integrally from the top edge of the air intake structure to fix the apex corner of the partition structure. A groove is set at the bottom of the outer cylinder to fix the bottom edge of the partition structure.

[0016] Preferably, the intake structure is a right trapezoid when viewed from the side, wherein the long side is connected to the outer cylinder of the annular cooling device, and the vertical surface where the short side is located is connected to the airflow supply pipe;

[0017] The right-angled side and the bottom edge of the outer cylinder are in the same plane;

[0018] A locking structure is provided on the side, which allows the air intake structure to be detachably connected to the plate, and in turn, the ring-shaped cooling device to be detachably connected to the plate.

[0019] The arc angle of the spacer structure is 120°.

[0020] Preferably, the stretching rods include at least four rods: stretching rod one, stretching rod two, stretching rod three, and stretching rod four.

[0021] Among them, stretching rod one and stretching rod four are on the same horizontal plane, stretching rod two and stretching rod three are on the same horizontal plane, and the horizontal height of stretching rod one is lower than that of stretching rod two.

[0022] The threads of stretching rollers one and two are vertically upward.

[0023] The advantages of this invention are: modular structure, which facilitates large-scale production; stable, low-pressure airflow, reducing the possibility of breakage of molten wires during shaping; and ease of cleaning, maintenance, and disassembly. Attached Figure Description

[0024] Figure 1 This is the assembly wiring diagram from Example 1;

[0025] Figure 2 This is a cross-sectional view of the annular cooling device in Example 1;

[0026] In the diagram: 1. Spinneret box, 2. Plate, 3. Ring-type cooling device, 4. Front guide roller, 5. Tension roller, 6. Rear guide roller, 31. Outer cylinder, 32. Inner cylinder, 33. Air intake structure, 34. Spacing structure. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Example

[0028] like Figure 1 and Figure 2 As shown, the POY filament ultrafine stretching device includes: a plate 2, which is vertically arranged below the spinneret (the spinneret is arranged on the bottom plate of the spinneret box 1), and several ring-shaped cooling devices, guide rollers, and stretching rollers are arranged on the plate.

[0029] The cooling airflow for the annular cooling device 3 is provided by an external fan;

[0030] The molten filaments extruded from the spinneret pass through the annular cooling device, are guided by a guide roller into the stretching structure composed of several stretching rollers, and are then exited from the device via another guide roller.

[0031] The annular cooling device includes at least one air intake structure 33 located on the outer periphery, which also serves as a support and is detachably connected to the plate.

[0032] The fan forces airflow into the annular cooling device through a duct. As the airflow passes through the intake structure, it slows down and carries away some heat due to expansion, allowing the room temperature fan to provide airflow below room temperature. The airflow is then blown annularly onto the molten filaments in the inner ring of the annular cooling device for initial filament shaping.

[0033] The ring-type cooling device includes: an outer cylinder 31 with a removable and sealable annular top cover and an inner cylinder concentrically fitted inside;

[0034] The inner cylinder 32 has through holes arranged in an array on its cylinder wall;

[0035] An interlayer structure 34 is provided between the air intake structure and the inner cylinder;

[0036] The partition structure is set in an arc shape between the inner cylinder and the inner cylinder. The unfolded plane of the partition structure is triangular, and the apex of the partition structure is detachably connected to the air intake structure.

[0037] The spacer structure can further slow down the airflow and prevent the airflow pressure blowing out of the inner cylinder from being too high.

[0038] When setting up the inner cylinder and the partition structure, an annular sealing ring is first installed on the bottom surface of the outer cylinder, and then the inner cylinder is fitted on top. This not only reduces vibration but also further seals the surface. The top cover of the outer cylinder contains two sealing rings, one inner and one outer. The inner ring corresponds to the inner cylinder, and the outer ring corresponds to the outer cylinder.

[0039] The outer cylinder is 230mm long, and the diameter difference between the inner and outer cylinders is 20mm.

[0040] To facilitate the installation and fixation of the partition structure, the apex and base corners of the triangle of the partition structure are chamfered to remove the acute angles. An L-shaped hook extends integrally from the top edge of the air intake structure to fix the apex corner of the partition structure. A groove is set at the bottom of the outer cylinder to fix the bottom edge of the partition structure.

[0041] The intake structure is a right-angled trapezoid when viewed from the side, with the long side connected to the outer cylinder of the annular cooling device and the vertical surface where the short side is located connected to the airflow supply pipe.

[0042] The right-angled side and the bottom edge of the outer cylinder are in the same plane;

[0043] A locking structure is provided on the side, which allows the air intake structure to be detachably connected to the plate, and in turn, the ring-shaped cooling device to be detachably connected to the plate.

[0044] The arc angle of the spacer structure is 120°.

[0045] The stretching rod 5 includes four rods: stretching rod one, stretching rod two, stretching rod three, and stretching rod four.

[0046] Among them, stretching rod one and stretching rod four are on the same horizontal plane, stretching rod two and stretching rod three are on the same horizontal plane, and the horizontal height of stretching rod one is lower than that of stretching rod two.

[0047] The threads of stretching rollers one and two are vertically upward.

[0048] In this embodiment, four sets of spinneret holes are used as an example, for which four annular cooling devices are constructed. For ease of guidance, there are four guide rollers 4 on the front side, each corresponding to the output axis of an annular cooling device. The yarn is guided into the stretching roller assembly through the front guide rollers and stretched sequentially. After the stretching roller assembly, there is a rear guide roller 6.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A POY filament ultrafine stretching device, characterized in that, Includes: a plate, vertically arranged below the spinneret, with several annular cooling devices, guide rollers, and stretching rollers on the plate; The cooling airflow for the annular cooling device is provided by an external fan; The molten filaments extruded from the spinneret pass through the annular cooling device, are guided by a guide roller into the stretching structure composed of several stretching rollers, and are then exited from the device via another guide roller. The annular cooling device includes at least one air intake structure located on the outer periphery, which also serves as a support and is detachably connected to the plate.

2. The POY filament ultrafine stretching device according to claim 1, characterized in that, The ring-type cooling device includes: an outer cylinder with a removable and sealable annular top cover, and an inner cylinder concentrically fitted inside; The inner cylinder wall is provided with an array of through holes; A spacer structure is provided between the air intake structure and the inner cylinder; The partition structure is set in an arc shape between the inner cylinder and the inner cylinder. The unfolded plane of the partition structure is triangular, and the apex of the partition structure is detachably connected to the air intake structure.

3. The POY filament ultrafine stretching device according to claim 2, characterized in that, The intake structure is a right-angled trapezoid when viewed from the side, with the long side connected to the outer cylinder of the annular cooling device and the vertical surface where the short side is located connected to the airflow supply pipe. The right-angled side and the bottom edge of the outer cylinder are in the same plane; A locking structure is provided on the side, which allows the air intake structure to be detachably connected to the plate, and in turn, the ring-shaped cooling device to be detachably connected to the plate.

4. The POY filament ultrafine stretching device according to claim 2, characterized in that, The arc angle of the spacer structure is 120°.

5. The POY filament ultrafine stretching device according to claim 1, characterized in that, The stretching rods include at least four rods: stretching rod one, stretching rod two, stretching rod three, and stretching rod four. Among them, stretching rod one and stretching rod four are on the same horizontal plane, stretching rod two and stretching rod three are on the same horizontal plane, and the horizontal height of stretching rod one is lower than that of stretching rod two. The threads of stretching rollers one and two are vertically upward.

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