阅读说明：本技术 一种改善熔体输出均匀性的锦纶纺丝熔融装置 (Improve polyamide fibre spinning melting device of fuse-element output homogeneity ) 是由 丁晨轩 左传胜 梁海斌 刘树福 王翠玲 于 2020-05-27 设计创作，主要内容包括：本发明涉及一种改善熔体输出均匀性的锦纶纺丝熔融装置,解决现有的锦纶纺丝熔体熔融装置后端输出的熔体存在流动时间差异,影响锦纶纺丝产品质量问题。本装置熔融装置本体的前段为圆柱型熔融段,后段为输出段,输出段的内径大于熔融段的内径,输出段的侧面连接有熔体输送管,所述输出段后端封闭,输出段内侧设有圆筒状的过滤环,过滤环上开设有出料孔,过滤环与输出段的内壁之间形成输送夹室,以靠近熔体输送管一侧为近侧,过滤环从近侧到远侧出料孔孔径逐步增大,所述输送夹室从远侧到近侧宽度逐步增大。本发明通过输出段的不对称设计,使得过滤环远侧和近侧的流出熔体进入熔体输送管的时间基本一致,解决锦纶纺丝熔体在熔融装置输出过程的粘度差异。(The invention relates to a nylon spinning melting device for improving the output uniformity of a melt, and solves the problem that the quality of a nylon spinning product is influenced by the flow time difference of the melt output from the rear end of the existing nylon spinning melt melting device. The anterior segment of this device melting device body is cylinder type melting section, and the back end is the output section, and the internal diameter of output section is greater than the internal diameter of melting section, and the side of output section is connected with the fuse-element conveyer pipe, the output section rear end seals, and the output section inboard is equipped with cylindric filtration ring, has seted up the discharge opening on the filtration ring, forms between the inner wall of filtration ring and output section and carries the clamp room to be close to fuse-element conveyer pipe one side for the near side, filter the ring from the near side to the gradual increase of far side discharge opening aperture, carry the clamp room from the far side to near side width gradual increase. According to the invention, through the asymmetric design of the output section, the time for the outflow melt at the far side and the time for the outflow melt at the near side of the filter ring to enter the melt conveying pipe are basically consistent, and the viscosity difference of the nylon spinning melt in the output process of the melting device is solved.)

1. The utility model provides an improve polyamide fibre spinning melting device of fuse-element output homogeneity, includes the melting device body, and the anterior segment of melting device body is cylinder type melting section, is provided with screw rod, its characterized in that in the melting section: the back end of the melting device body behind the screw is an output section, the inner diameter of the output section is larger than that of the melting section, a melt conveying pipe is connected to the side face of the output section, the back end of the output section is closed, a cylindrical filtering ring is arranged on the inner side of the output section, discharging holes communicated with the inner side and the outer side of the filtering ring are formed in the filtering ring, a conveying clamping chamber is formed between the outer side of the filtering ring and the inner wall of the output section, one side close to the melt conveying pipe is a near side, the aperture of the discharging holes of the filtering ring from the near side to the far side is gradually increased, and the width of the conveying clamping chamber.

2. The nylon spinning and melting device for improving the output uniformity of the melt according to claim 1, characterized in that: the rear end of the output section is provided with an end cover for sealing, and the front surface of the end cover extends out of the cylindrical filter ring.

3. A chinlon spinning and melting device for improving the uniformity of melt output according to claim 1 or 2, characterized in that: the inner diameter of the filter ring is consistent with the inner diameter of the melting section and is aligned with the inner diameter of the melting section.

4. A chinlon spinning and melting device for improving the output uniformity of melt according to claim 3, characterized in that: the inner wall of the output section is eccentrically arranged, and the radial distance between the inner wall of the near side of the output section and the axis of the screw is greater than that between the inner wall of the far side of the output section and the axis of the screw.

5. A chinlon spinning and melting device for improving the uniformity of melt output according to claim 1 or 2, characterized in that: the aperture of the far side discharge hole of the filter ring is 1.3-2 times of the aperture of the near side discharge hole.

6. A chinlon spinning and melting device for improving the uniformity of melt output according to claim 1 or 2, characterized in that: the filter ring is provided with a plurality of stages of discharge holes from the near side to the far side, and the aperture of each stage of discharge hole is in an arithmetic series or an geometric series.

7. A chinlon spinning and melting device for improving the uniformity of melt output according to claim 1 or 2, characterized in that: the width of the proximal side of the delivery clip chamber is 1.3-3 times the width of the distal side.

Technical Field

The invention belongs to the field of nylon production equipment, relates to a raw material melting device for nylon production, and particularly relates to a nylon spinning melting device for improving the output uniformity of a melt.

Background

The Nylon fiber is produced by using polyamide as a raw material, is commonly called Nylon (Nylon) and is called polyamide (PA for short) in English name, has excellent dyeing property, light weight, high strength, good wear resistance and good waterproof and windproof performance, and is one of the main yarn raw materials of current civil clothing. However, because the macromolecules of the nylon fiber contain two groups-COOH and-NH 2 which are easy to generate polycondensation and open-chain reaction, the nylon is easy to generate viscosity change in the high-temperature spinning production process, thereby causing the production instability. In order to overcome the instability of production, the design of the industrial production device abandons a pipeline filtering device with large volume and replaces the pipeline filtering device with annular filtering at the rear end of a screw of a melting device. A melting device for melting slice raw materials in chemical fiber production is provided with a horizontal cylindrical melting cavity, a screw is arranged in the melting cavity and used as a conveying component, and a helical blade is arranged on the surface of the screw and used for conveying the raw materials. The screw rod horizontal installation, the melting chamber of screw rod tail end rear side has the filtration ring of annular design, filters the ring outside and is equipped with and presss from both sides the room, filters ring circumference and offers the relief hole, and the spinning fuse-element of molten state is arranged the material and is filtered from inside to outside radial periphery 360 degrees directions, then converges in annular clamp room, delivers to next process through the fuse-element conveyer pipe of pressing from both sides the side connection of room. As the rear end of the nylon melting device discharges materials and filters in the direction of 360 degrees from the inside to the outside along the radial circumference, then eccentrically converging to one side in the interlayer cavity and sending into a melt conveying pipe, in the production process of the nylon fiber, the spinning melt obtained by high-temperature melting has higher flowing viscosity, belongs to a non-Newtonian fluid type, so that the melt close to one side of the melt conveying pipe can more easily enter the melt conveying pipe, the melt away from the melt conveying pipe can less easily enter the melt conveying pipe, thereby causing a melt flow process at this location, the melt at the side facing away from the melt conveying pipe has a longer flow time relative to the melt at the side close to the melt conveying pipe, this differential flow time brings a difference in viscosity from the melt on the side near the melt-conveying pipe for nylon molecules with macromolecules containing two-COOH, -NH 2 groups that are susceptible to condensation and chain-opening reactions. This difference is expressed in the form of abnormality of broken filaments, looped filaments, etc. in the production process of the factory, and since the root cause of occurrence of these production abnormality is caused by a defect in the basic design of the equipment, it is difficult to completely and effectively improve from the conventional production control process.

Disclosure of Invention

The invention aims to solve the problems that the melt output from the rear end of the existing nylon spinning melt melting device has flow time difference, so that the melt viscosity difference is caused, and the abnormal conditions such as broken filaments, looped filaments and the like are reflected in the production process, so that the quality of a nylon spinning product is influenced.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an improve polyamide fibre spinning melting device of fuse-element output homogeneity, includes the melting device body, and the anterior segment of melting device body is cylinder type melting section, is provided with screw rod, its characterized in that in the melting section: the back end of the melting device body behind the screw is an output section, the inner diameter of the output section is larger than that of the melting section, a melt conveying pipe is connected to the side face of the output section, the back end of the output section is closed, a cylindrical filtering ring is arranged on the inner side of the output section, discharging holes communicated with the inner side and the outer side of the filtering ring are formed in the filtering ring, a conveying clamping chamber is formed between the outer side of the filtering ring and the inner wall of the output section, one side close to the melt conveying pipe is a near side, the aperture of the discharging holes of the filtering ring from the near side to the far side is gradually increased, and the width of the conveying clamping chamber. The scheme fully explores the characteristic of poor non-Newtonian fluid fluidity, increases the outflow of the melt away from one side of the melt conveying pipe, reduces the outflow of the melt close to one side of the melt conveying pipe and reduces the width of the conveying clamping chamber away from one side of the melt conveying pipe through asymmetric design, so as to improve the flow rate of the melt. According to different specifications of the screw, different sizes of the conveying interlayer, and the distance difference between the side close to the melt conveying pipe and the side far away from the melt conveying pipe, the aperture gradient of the discharge hole and the width gradient of the output clamping chamber are designed, so that the outflow volume and the flow rate ratio of the melt on the near side and the far side of the filter ring are controlled, the time for the outflow melt on the far side and the near side of the filter ring to enter the melt conveying pipe is basically consistent, the viscosity difference caused by the flow time difference between the near side and the far side in the output process of the nylon spinning melt at the tail end of a melting device is solved, the incidence rate of broken filaments, broken filaments and looped filaments in factory production is greatly reduced, the quality uniformity of products is improved, the consumption is reduced, and after practical use proves that the defective product rate of broken filaments, looped filaments and.

Preferably, the rear end of the output section is provided with an end cover for closing, and the front surface of the end cover extends out of the cylindrical filter ring. The end cover can be regularly opened and cleaned, and large-particle agglomerated materials which are limited and filtered by the aperture of the discharge hole are removed.

Preferably, the filter ring has an inner diameter that is coincident with and aligned with the inner diameter of the melt section. The filter ring is aligned with the axis of the melting section and keeps smooth output, so that the flowing dead angle of the axial conveying of raw materials is avoided.

Preferably, the inner wall of the output section is eccentrically arranged, and the radial distance between the inner wall of the output section near side and the axis of the screw is larger than that between the inner wall of the output section far side and the axis of the screw. The eccentric arrangement of the outlet section by the inner wall is reflected in a change in the width of the conveying nip.

Preferably, the aperture of the discharge hole at the far side of the filter ring is 1.3-2 times that of the discharge hole at the near side.

Preferably, the filter ring is provided with a plurality of stages of discharge holes from the near side to the far side, and the aperture of each stage of discharge hole is in an arithmetic progression or an geometric progression.

Preferably, the width of the proximal side of the delivery clip chamber is 1.3-3 times the width of the distal side.

According to the invention, through the asymmetric design of the two sides of the output section of the melting device, the outflow of the melt far away from one side of the melt conveying pipe is increased, the outflow of the melt near one side of the melt conveying pipe is reduced, the width of the conveying clamping chamber far away from one side of the melt conveying pipe is reduced to accelerate the flow rate of the melt, so that the time for the outflow melt at the far side and near side of the filter ring to enter the melt conveying pipe is basically consistent, the viscosity difference generated in the output process of the melting device of the polyamide spinning melt is solved, the incidence of broken filaments, broken filaments and looped filaments in factory production is greatly reduced, and the quality uniformity of products.

Drawings

FIG. 1 is a schematic diagram of one configuration of the present invention.

Fig. 2 is a schematic view showing the developed result of the filtering ring of fig. 1 according to the present invention.

In the figure: 1. the melting device comprises a melting device body, 2, a melting section, 3, a screw rod, 4, an output section, 5, an end cover, 6, a filter ring, 7, a first-level discharge hole, 8, a second-level discharge hole, 9, a third-level discharge hole, 10, a fourth-level discharge hole, 11, a conveying clamping chamber and 12 a melt conveying pipe.

Detailed Description

The invention is further illustrated by the following specific examples in conjunction with the accompanying drawings.