A winding device for fine denier yarn and a winding method thereof

Abstract

The present invention discloses a winding device for fine denier yarn and a winding method thereof, which relates to the technical field of textile machinery, and comprises a frame, a winding mechanism, a mounting frame, a feeding mechanism, an oiling mechanism and a discharging mechanism, wherein the oiling mechanism comprises a mounting plate 1, a material dividing wheel, an oiling assembly and a rotating wheel, and the oiling assembly comprises an oil tank, an oil tanker and a recovery tank, wherein the oil tank is mounted on the upper side of the oil tanker, the recovery tank is arranged on the lower side of the oil tanker, the oil tank is a hollow structure with an opening on the lower side, an oil pipeline is passed through the oil tank, a top block is arranged on the upper side of the oil tanker, a filter screen is arranged in the oil tank, both ends of the filter screen pass through the oil tank, a plurality of micro motors are arranged on the upper side of the oil tank, traction ropes are connected to the drive shaft of the micro motor on both sides of the filter screen, and a guide groove is arranged on the outer side of the oil tank to cooperate with the filter screen cover. The present invention improves the oiling rate and lubrication quality of fine denier yarn.

Description

Technical Field

[0001] The invention relates to the technical field of textile machinery, in particular to a winding device for fine denier yarns and a winding method thereof. Background Art

[0002] The linear density of a fiber is an important quality indicator, which is closely related to the strength, uniformity of thickness, appearance, feel, style, etc. of the fiber; and the bending stiffness of a fiber is proportional to the square of the linear density of the fiber. Therefore, the smaller the linear density of the fiber, that is, the finer the fiber, the softer the textile fabric made of it. Fine denier yarn refers to the yarn with a lower linear density. Usually, the fiber with a single fiber fineness of 1.0 to 0.5 dpf is called fine denier yarn.

[0003] The production process of fine denier yarn mainly includes spinning, bundling and winding. Among them, fine denier yarn winding is an important link in the production process of chemical fibers, which involves fiber molding and post-processing. During the winding process, the tension, speed and arrangement of the fiber bundles need to be precisely controlled to ensure the quality and uniformity of the fibers. In order to reduce the friction between the fibers, reduce surface wear and improve the tensile properties of the fibers, fine denier yarns often need to be lubricated during the winding process.

[0004] Existing oiling devices mostly use nozzles or oil wheels to lubricate each fine-denier wire before it is bundled. However, the number of fine-denier wires in the bundle is not consistent. When the number is small, the oiling area is narrow, wasting oil. When the number is large, uneven oiling may occur. Summary of the invention

[0005] The object of the present invention is to provide a winding device and a winding method for fine denier yarns to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a winding device for fine denier yarn, comprising a frame, a winding mechanism, a mounting frame, a feeding mechanism, an oiling mechanism and a discharging mechanism, wherein the winding mechanism is fixed on the frame, the mounting frame is fixed on one side of the winding mechanism, the feeding mechanism, the oiling mechanism and the discharging mechanism are respectively arranged on the mounting frame, the oiling mechanism comprises a mounting plate one, a material dividing wheel, an oiling assembly and a turn-out wheel, and the material dividing wheel, the oiling assembly and the turn-out wheel are sequentially arranged on the mounting plate one.

[0007] According to the above technical solution, the oiling assembly includes an oil tank, an oil tanker and a recovery tank, wherein the oil tank is mounted on the upper side of the oil tanker, the recovery tank is arranged on the lower side of the oil tanker, the oil tank is a hollow structure with an opening on the lower side, an oil pipeline is passed through the oil tank, a top block is arranged on the upper side of the oil tanker, a filter is arranged inside the oil tank, both ends of the filter pass through the oil tank, a number of micro motors are arranged on the upper side of the oil tank, traction ropes are connected to the driving shafts of the micro motors on both sides of the filter, and guide grooves are arranged on the outer side of the oil tank to cooperate with the filter cover.

[0008] According to the above technical solution, the filter is made of a material with good elasticity and is used to filter the lubricating oil in the oil tank, and the filter mesh is covered on the top block.

[0009] According to the above technical solution, a grid frame is fixed in the recovery tank, a sponge block is arranged on the grid frame, and a hole is opened at the bottom of the recovery tank.

[0010] According to the above technical solution, a plurality of fine grooves are provided on the dividing wheel to help separate the fine denier filaments so as to facilitate subsequent complete oiling.

[0011] According to the above technical solution, the feeding mechanism includes a screw drive module, a set of positioning wheels and a test box, wherein the screw drive module is used to adjust the winding position of the fine denier yarn, the positioning wheel is used to adjust the feeding position of the fine denier yarn, and the test box is arranged at the outlet of the positioning wheel to detect the bundling area of ​​the fine denier yarn and assist in separating the fine denier yarn.

[0012] According to the above technical solution, a group of rotating plates are arranged in the test box, the rotating plates are penetrated by a rotating shaft, the end of the rotating shaft is connected to a motor, a baffle is hinged on the lower side of the rotating plate, a perforated plate is arranged on the lower side of the baffle, and an air pump is connected to the outside of the test box.

[0013] According to the above technical solution, a group of limit plates are arranged on the upper side of the rotating plate, and the limit plates are connected to a screw driving module for adjusting the distance between the two limit plates.

[0014] According to the above technical solution, the discharging mechanism includes several wheel groups, which are used to collect the lubricated fine denier filaments and transfer them to the winding mechanism.

[0015] The specific usage is as follows:

[0016] Step 1: Feeding, the fine denier filaments are bundled into the feeding mechanism, and the fine denier filaments are bundled;

[0017] Step 2: Oiling, the fine denier yarn bundle is coated with lubricating oil through the oiling mechanism;

[0018] Step 3: Reeling: the fine denier filaments are bundled and integrated in the discharging mechanism, and finally reeled and stored by the reeling mechanism.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention is provided with an oiling component, in which the filter can filter the lubricating oil, the oil wheel and the sponge block can fully lubricate the fine denier filaments passing through, and the excess oil can be recovered, thereby ensuring the oiling rate while saving oil consumption; the sediment accumulated on the mesh surface can be scraped off by the pulling action of the micro motor on the filter, thereby ensuring the speed of lubricating oil filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a partial schematic diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of the oiling mechanism of the present invention;

[0024] Figure 4 is a schematic diagram of an oiling assembly of the present invention;

[0025] Figure 5 is a cross-sectional view of an oiling assembly of the present invention;

[0026] Figure 6 The present invention Figure 5 A magnified schematic diagram of area A;

[0027] Figure 7 is a schematic diagram of a test box of the present invention;

[0028] Figure 8 It is a schematic diagram of the internal structure of the test box of the present invention;

[0029] Fig. 9 is a schematic diagram of Embodiment 2 of the present invention;

[0030] In the figure: 1. frame; 2. winding mechanism; 3. mounting frame; 41. mounting plate 1; 42. material distribution wheel; 43. oiling assembly; 431. oil tank; 432. oil tanker; 4321. top block; 433. recovery tank; 4331. grid frame; 4332. sponge block; 434. oil pipeline; 435. filter screen; 436. micro motor; 437. traction rope; 438. guide groove; 439. oil outlet; 44. rotating wheel; 51. screw drive module; 52. positioning wheel; 53. test box; 54. rotating plate; 541. rotating shaft; 542. motor 1; 543. baffle; 55. orifice plate; 56. limit plate; 57. screw drive module; 6. wheel group; 61. oil outlet 1; 62. oil tank; 63. oil outlet 2. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figure 1-8 The present invention provides a technical solution: a winding device for fine denier yarn, comprising a frame 1, a winding mechanism 2, a mounting frame 3, a feeding mechanism, an oiling mechanism and a discharging mechanism, wherein the winding mechanism 2 is fixed on the frame 1, the mounting frame 3 is fixed on one side of the winding mechanism 2, the feeding mechanism, the oiling mechanism and the discharging mechanism are respectively arranged on the mounting frame 3, the oiling mechanism comprises a mounting plate 41, a material dividing wheel 42, an oiling assembly 43 and a turning wheel 44, and the material dividing wheel 42, the oiling assembly 43 and the turning wheel 44 are sequentially arranged on the mounting plate 41;

[0034] like Figures 3 to 6 As shown, the oiling assembly 43 includes an oil tank 431, an oil tanker 432 and a recovery tank 433, wherein the oil tank 431 is mounted on the upper side of the oil tanker 432, the recovery tank 433 is arranged on the lower side of the oil tanker 432, the oil tank 431 is a hollow structure with an opening on the lower side, an oil pipeline 434 is passed through the oil tank 431, a top block 4321 is arranged on the upper side of the oil tanker 432, a filter screen 435 is arranged in the oil tank 431, both ends of the filter screen 435 pass through the oil tank 431, a plurality of micro motors 436 are arranged on the upper side of the oil tank 431, traction ropes 437 are connected to the driving shafts of the micro motors 436 on both sides of the filter screen 435, and guide grooves 438 are arranged on the outer side of the oil tank 431 to cooperate with the filter screen 435 cover.

[0035] Supplementary explanations based on the above structure are as follows: the filter 435 is made of a material with good elasticity and is used to filter the lubricating oil in the oil tank 431. The mesh of the filter 435 is covered on the top block 4321. When the micro motor 436 is turned on, it will control the traction rope 437 to stretch the two sides of the filter 435 to help accelerate the oil filtration and remove the sediment attached to the surface of the filter 435; the top block 4321 is preferably provided with rounded corners on both sides to avoid scratching the filter 435; the oil tank 431 is provided with oil outlet holes 439 above both sides of the filter 435 for regularly extracting the sediment accumulated on the surface of the filter 435; the lower side of the oil tank 431 is set to match the curvature of the oil tanker 432 and is separated by a certain distance.

[0036] A grid frame 4331 is fixed in the recovery tank 433 , a sponge block 4332 is arranged on the grid frame 4331 , and a hole is opened at the bottom of the recovery tank 433 .

[0037] In one embodiment, the oil tank 431 is externally connected to an oil input device and an oil storage tank, and the bottom opening of the recovery tank 433 is connected to the oil storage tank. Preferably, the oil storage tank is built with, for example, an electric heating system for adjusting the temperature of the lubricating oil, thereby ensuring good fluidity and uniformity of the lubricating oil. After the lubricating oil is transported to the oil tank 431, it is filtered through the filter screen 435 and flows to the surface of the oil tanker 432, then flows to the lower side, and finally drips into the recovery tank 433. Between the oil tanker 432 and the recovery tank 433 is a fine denier yarn passing area. Preferably, one side of the recovery tank 433 is provided with There is a driving module that can adjust the distance between the oil wheel 432 and the recovery tank 433. The fine denier yarn will be coated with lubricating oil when passing through the lower side of the oil wheel 432. At the same time, the sponge block 4332 will brush the lubricating oil on the lower side of the fine denier yarn. The sponge block 4332 will receive the oil dripping from the oil wheel 432. In the case of oil overflow, the excess oil squeezed out by the sponge block 4332 will flow to the bottom of the recovery tank 433 through the grid frame 4331 and be transported back to the oil storage tank for recovery, forming a lubricating oil use cycle, and the excess oil is recovered under the premise of ensuring that the fine denier yarn is fully oiled.

[0038] Furthermore, the dividing wheel 42 is provided with a plurality of fine grooves for helping to separate the fine denier filaments so as to facilitate subsequent complete oiling.

[0039] The feeding mechanism includes a screw drive module 51, a set of alignment wheels 52 and a test box 53, wherein the screw drive module 51 is used to adjust the winding position of the fine denier yarn, the alignment wheel 52 is used to adjust the feeding position of the fine denier yarn, and the test box 53 is arranged at the outlet of the alignment wheel 52 to detect the fine denier yarn bundling area and assist in separating the fine denier yarn.

[0040] like Figure 7-8As shown, a set of rotating plates 54 are arranged in the test box 53, and a rotating shaft 541 is passed through the rotating plate 54, and a motor 542 is connected to the end of the rotating shaft 541. A baffle 543 is hinged on the lower side of the rotating plate 54, and a perforated plate 55 is arranged on the lower side of the baffle 543. The test box 53 is externally connected to an air pump.

[0041] In actual operation, the motor 542 is used to drive the rotating plate 54 to deflect relative to each other. The baffle 543 maintains a naturally drooping state under the influence of its own mass. When the rotating plate 54 rotates, the distance between the two baffles 543 will be indirectly reduced. The upper side of the rotating plate 54 is the gas input side, and the lower side of the baffle 543 is the fine denier yarn passing area. The baffle 543 is used to adjust the airflow passing area. The orifice plate 55 is an orifice plate flowmeter, which calculates the flow rate by measuring the pressure difference generated when the fluid flows through the orifice plate 55; the width of the fine denier yarn bundle is calculated by the airflow method, and combined with the number of fine denier yarn bundles, it is determined whether there are multiple fine denier yarns superimposed locally. Furthermore, the airflow method is a technology used to measure the fineness of fibers. Its basic principle is to measure the fineness of fibers by using the change in resistance of air flowing through the fiber plug. By introducing an air flow with a certain pressure difference into the test box 53, the air flow rate is inversely proportional to the square of the surface area of ​​the fine denier yarn, so as to indirectly measure the fineness of the fine denier yarn. In this case, the width of the fine denier yarn bundle is measured by the air flow rate, combined with the number of input fine denier yarns, and compared with the width of the fine denier yarn bundle when it moves side by side normally, to determine whether there are multiple fine denier yarns superimposed at the same longitudinal position.

[0042] In one embodiment, in order to assist in separating the stacked fine denier filaments, a group of limit plates 56 are provided on the upper side of the rotating plate 54, and the limit plates 56 are connected to a screw drive module 57 for adjusting the distance between the two limit plates 56, thereby further reducing the area of ​​airflow input and helping to disperse the stacked fine denier filaments.

[0043] The discharging mechanism includes a plurality of wheel groups 6 for collecting the lubricated fine denier filaments and transferring them to the winding mechanism 2 .

[0044] The specific implementation methods are as follows:

[0045] Step 1: Feeding, the fine denier filaments are bundled into the feeding mechanism, and the fine denier filaments are bundled;

[0046] Step 2: Oiling, the fine denier yarn bundle is coated with lubricating oil through the oiling mechanism;

[0047] Step 3: Reeling: the fine denier filaments are bundled and integrated in the discharging mechanism, and finally reeled and stored by the reeling mechanism 2.

[0048] Specifically, in step 2, the lubrication process is as follows: oil with suitable temperature and good fluidity is input into the oil tank 431, the oil is intercepted and slowly filtered by the filter 435, and the internal sediment is accumulated on the filter 435. Before lubrication, it is necessary to ensure that the surface of the oil tanker 432 is covered with lubricating oil and the sponge block 4332 is soaked with lubricating oil. The recovery of excess oil by the recovery tank 433 is judged, that is, the oil output device connected to the recovery tank 433 will feedback whether there is oil in the recovery tank 433 that can be extracted and the extraction amount. The oil output device always maintains the extraction state. When there is excess oil in the recovery tank 433, it can be considered that the surface of the oil tanker 432 is covered with lubricating oil, the sponge block 4332 is soaked with lubricating oil, and the lubrication is ready;

[0049] After continuous filtration, the sediment intercepted on the surface of the filter 435 will gradually increase, reducing the filtering speed of the lubricating oil. At this time, it can be cleaned regularly. In order to prevent the sediment from sticking to the surface of the filter 435 and being difficult to detach, the micro motor 436 on one side of the filter 435 rotates to start winding up the filter 435, while the micro motor 436 on the other side rotates to unwind the filter 435. One side of the filter 435 moves out of the oil tank 431, and the surface sediment is scraped off by the inner wall of the oil tank 431. The surface can be cleaned by pulling the filter 435 back and forth, and then the oil position with the most sediment content is extracted and cleaned through the oil outlet 439;

[0050] Furthermore, if during the lubrication process, the oil output device reports that no excess oil is produced within a plurality of unit times or the amount of oil extracted is always within a relatively low range, it can be considered that the amount of lubricating oil is insufficient and the lubricating oil is filtered too slowly. At this time, the micro motors 436 on both sides of the filter 435 simultaneously rotate and pull the filter 435. With their own good shrinkage properties, the filter holes of the filter 435 are enlarged with the help of the top block 4321, thereby increasing the input amount of oil and thereby speeding up the filtration speed.

[0051] Example 2

[0052] like Fig. 9 As shown, in order to avoid the lubricating oil from peeling off the fine denier filaments after lubrication during the subsequent integration and movement, the wheel set 6 is structurally improved on the basis of Example 1, and an oil replenishing module is added. The wheel set 6 includes a test wheel and an oil replenishing wheel, wherein the surface of the test wheel is paved with a friction test module for detecting the friction generated when the fine denier filaments are bundled and passed, evaluating the lubrication degree of the fine denier filaments, and judging whether lubricating oil needs to be replenished. The upper side of the oil replenishing wheel is grooved and connected to the oil storage tank. The upper side of the oil replenishing wheel is provided with an oil outlet 1 61 around the wheel body, and the lower side of the oil replenishing wheel is provided with an oil groove 62. The oil groove 62 is connected to an oil outlet 2 63, and the oil outlet 2 63 is connected to the oil storage tank.

[0053] In actual operation, the test wheel and the oil replenishing wheel are staggered. In principle, they are installed in the order of the test wheel first and the oil replenishing wheel later. The oil storage tank will deliver a certain amount of lubricating oil to the oil replenishing wheel based on the judgment result of the friction test module, replenish lubrication for the fine denier filaments passing through, and then recover the excess oil.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A winding device for fine denier yarns, comprising a frame (1), a winding mechanism (2), a mounting frame (3), a feeding mechanism, an oiling mechanism and a discharging mechanism, characterized in that: The winding mechanism (2) is fixed on the frame (1), the mounting frame (3) is fixed on one side of the winding mechanism (2), the feeding mechanism, the oiling mechanism and the discharging mechanism are respectively arranged on the mounting frame (3), the oiling mechanism comprises a mounting plate (41), a material dividing wheel (42), an oiling assembly (43) and a turning wheel (44), and the material dividing wheel (42), the oiling assembly (43) and the turning wheel (44) are arranged on the mounting plate (41) in sequence; The oiling assembly (43) comprises an oil tank (431), an oil tanker (432) and a recovery tank (433), wherein the oil tank (431) is mounted on the upper side of the oil tanker (432), the recovery tank (433) is arranged on the lower side of the oil tanker (432), the oil tank (431) is a hollow structure with an opening on the lower side, an oil pipeline (434) is passed through the oil tank (431), a top block (4321) is arranged on the upper side of the oil tanker (432), a filter screen (435) is arranged inside the oil tank (431), both ends of the filter screen (435) pass through the oil tank (431), a plurality of micro motors (436) are arranged on the upper side of the oil tank (431), traction ropes (437) are connected to the drive shafts of the micro motors (436) on both sides of the filter screen (435), and a guide groove (438) is arranged on the outer side of the oil tank (431) to cooperate with the filter screen (435) cover; The feeding mechanism comprises a screw drive module (51), a set of positioning wheels (52) and a test box (53), wherein the screw drive module (51) is used to adjust the winding position of the fine denier yarn, the positioning wheels (52) are used to adjust the feeding position of the fine denier yarn, and the test box (53) is arranged at the outlet of the positioning wheels (52) and is used to detect the fine denier yarn bundling area and assist in separating the fine denier yarns; A group of rotating plates (54) are arranged in the test box (53), a rotating shaft (541) is passed through the rotating plate (54), an end of the rotating shaft (541) is connected to a motor 1 (542), a baffle (543) is hingedly connected to the lower side of the rotating plate (54), a perforated plate (55) is arranged on the lower side of the baffle (543), and an air pump is externally connected to the test box (53).

2. A winding device for fine denier yarn according to claim 1, characterized in that: The filter screen (435) is made of a material with good elasticity and is used to filter the lubricating oil in the oil tank (431); the mesh surface of the filter screen (435) covers the top block (4321); The micro motor (436) is turned on to control the traction rope (437) to stretch both sides of the filter screen (435) to help accelerate oil filtration and remove sediment attached to the surface of the filter screen (435).

3. A winding device for fine denier yarn according to claim 2, characterized in that: A grid frame (4331) is fixed in the recovery tank (433), a sponge block (4332) is arranged on the grid frame (4331), and a hole is opened at the bottom of the recovery tank (433).

4. A winding device for fine denier yarn according to claim 3, characterized in that: The discharging mechanism comprises a plurality of wheel groups (6) for collecting the lubricated fine-denier filaments and rotating them to the winding mechanism (2).

5. A winding method for a winding device for fine denier yarns, applicable to the winding device for fine denier yarns according to claim 4, characterized in that: The specific winding method is as follows: Step 1: Feeding, the fine denier filaments are bundled into the feeding mechanism, and the fine denier filaments are bundled; Step 2: Oiling, the fine denier yarn bundle is coated with lubricating oil through the oiling mechanism; Step 3: Reeling: the fine denier filaments are bundled and integrated in the discharging mechanism, and finally reeled and stored by the reeling mechanism (2).

6. A winding method for a fine denier winding device according to claim 5, characterized in that: Oil with a suitable temperature and good fluidity is input into the oil tank (431). The oil is intercepted by the filter (435) and slowly filtered, and the internal sediment is accumulated on the filter (435). Before lubrication, it is necessary to ensure that the surface of the oil tanker (432) is covered with lubricating oil and the sponge block (4332) is soaked with lubricating oil. The recovery of excess oil in the recovery tank (433) is judged, that is, the oil output device connected to the recovery tank (433) will feedback whether there is oil in the recovery tank (433) that can be extracted and the amount of oil extracted. The oil output device always maintains the extraction state. When there is excess oil in the recovery tank (433), it can be considered that the surface of the oil tanker (432) is covered with lubricating oil, the sponge block (4332) is soaked with lubricating oil, and lubrication is ready.

7. A winding method for a fine denier winding device according to claim 6, characterized in that: After continuous filtration, the amount of sediment intercepted on the surface of the filter (435) will gradually increase, reducing the filtering speed of the lubricating oil. At this time, it can be removed regularly. In order to prevent the sediment from adhering to the surface of the filter (435) and being difficult to detach, the micro motor (436) on one side of the filter (435) rotates to start rewinding the filter (435), while the micro motor (436) on the other side rotates to unwind the filter (435). One side of the filter (435) moves out of the oil tank (431), and the surface sediment is scraped off by the inner wall of the oil tank (431). The surface can be cleaned by pulling the filter (435) back and forth, and then the oil position with the most sediment content is extracted and cleaned through the oil outlet (439).

8. A winding method for a fine denier winding device according to claim 7, characterized in that: If during the lubrication process, the oil output device reports that there is no excess oil output for multiple unit times or the amount of oil extracted is always within a low range, it can be considered that the amount of lubricating oil is insufficient and the lubricating oil is filtered too slowly. At this time, the micro motors (436) on both sides of the filter (435) rotate and pull the filter (435) at the same time. With their own good shrinkage, the filter holes of the filter (435) are expanded with the help of the top block (4321), thereby increasing the input amount of oil and accelerating the filtering speed.

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