阅读说明：本技术 熔喷布生产线用纤维收集器 (Fiber collector for melt-blown fabric production line ) 是由 林泽舜 梅丽莎 陈悦 梅矩魏 于 2020-07-24 设计创作，主要内容包括：本发明提供了一种熔喷布生产线用纤维收集器。熔喷布生产线用纤维收集器,包括网格输送带装置,网格输送带装置内部设有敞口的抽风箱,抽风箱通过管路与抽风机连接；纤维收集器侧部对应设有卷绕装置；抽风箱内设有均风组件。本发明通过在纤维收集器的抽风箱中设置特定构造的均风组件,测试表明,使得生产过程中,抽风箱上方的空气流速均一,网格输送带装置不同区域接收到的纤维量一致,从而生产的熔喷布产品厚度均一,质量较好。(The invention provides a fiber collector for a melt-blown fabric production line. The fiber collector for the melt-blown fabric production line comprises a grid conveyor belt device, wherein an open air pumping box is arranged in the grid conveyor belt device and is connected with an exhaust fan through a pipeline; the side part of the fiber collector is correspondingly provided with a winding device; an air equalizing component is arranged in the air pumping box. According to the invention, the air equalizing component with a specific structure is arranged in the air draft box of the fiber collector, and tests show that in the production process, the air flow rate above the air draft box is uniform, the fiber quantities received by different areas of the grid conveyor belt device are consistent, so that the produced melt-blown fabric product has uniform thickness and good quality.)

1. The fiber collector for the melt-blown fabric production line comprises a grid conveyor belt device (701), wherein an open air suction box (702) is arranged in the grid conveyor belt device (701), and the air suction box (702) is connected with an exhaust fan (703) through a pipeline; the method is characterized in that: an air equalizing component is arranged in the air pumping box (702), and comprises an upper air guide grid (704) and a lower air guide grid (705) arranged below the upper air guide grid (704); the upper air guide grid (704) comprises a pair of upper air guide grid mounting plates (7041) for fixing the upper air guide grid (704) in the air pumping box (702), and a group of trapezoidal grid bars (7042) uniformly arranged between the two upper air guide grid mounting plates (7041); the lower air guide grid (705) comprises a pair of lower air guide grid mounting plates (7051) for fixing the lower air guide grid (705) in the air pumping box (702), and a group of inverted trapezoidal grid bars (7052) uniformly arranged between the two lower air guide grid mounting plates (7051); the trapezoid grid bars (7042) and the inverted trapezoid grid bars (7052) are arranged in a staggered mode.

2. The fiber collector for a meltblown manufacturing line according to claim 1, further comprising: the lower end position of the trapezoid grid bar (7042) is lower than the upper end position of the inverted trapezoid grid bar (7052); the distance D1 between the lower end of the trapezoid grid bar (7042) and the bottom of the inverted trapezoid grid bar (7052) is 80-120% of the distance D2 between two adjacent inverted trapezoid grid bars (7052).

3. The fiber collector for a meltblown manufacturing line according to claim 2, further comprising: two adjacent inverted trapezoidal grid bars (7052) are spaced apart by a distance D2 of 1-3 cm.

4. The fiber collector for a meltblown manufacturing line according to claim 1, 2 or 3, characterized in that: the upper air guide grid mounting plate (7041), the lower air guide grid mounting plate (7051) and the air pumping box (702) are fixedly connected through threads.

Technical Field

The invention relates to a melt-blown fabric production technology, in particular to a fiber collector for a melt-blown fabric production line.

Background

The melt-blown fabric is also called melt-blown non-woven fabric, and is woven by adopting a melt-blown non-woven process. The melt-blown non-woven process is to utilize high-speed hot air to draw polymer melt fine flow extruded from spinneret orifices so as to form superfine fibers, spray the superfine fibers on a collecting device, and form non-woven fabric by means of self-adhesion.

The existing melt-blown fabric production line generally comprises an extruder, a melt filter, a metering pump and a melt-blowing die head which are connected in sequence, wherein during operation, a screw extruder heats and melts granules, then the granules are conveyed to the melt filter, the granules are conveyed to the metering pump after being filtered, and a raw material melt is conveyed to the melt-blowing die head by the metering pump and sprayed to a fiber collector. The melt-blowing die head is connected with an air compressor through a pipeline by an air heater, and when the melt-blowing die head works, the melt extruded by the melt-blowing die head is drawn by the heated high-pressure air flow to form fibers. The melt-blown die head and the fiber collector are arranged oppositely, the fiber collector comprises a grid conveyor belt device, an open air-extracting box is arranged in the grid conveyor belt device corresponding to the melt-blown die head, the air-extracting box is connected with an exhaust fan through a pipeline, and when the fiber-blowing device works, the air flow generated by the exhaust fan replenishes the fibers onto the grid conveyor belt and cools and solidifies the fibers; the side part of the fiber collector is provided with a winding device, and the produced melt-blown fabric is collected by a winding roller; some still are furnished with and stay static and cut apart the function, before getting into the roll-up roller and collecting, stay static and cut apart convenient follow-up use to the melt-blown fabric.

The uniformity of the melt-blown fabric is an important index for measuring the quality of the melt-blown fabric, and actual production shows that when the melt-blown fabric is produced by using the existing production equipment, because the air flow rates of different areas above an air suction box of a fiber collector are not uniform, the fiber receiving amounts of different parts of a grid conveyor belt device of a fiber receiver are different, more fibers are often received in the middle, and less fibers are received at two sides, so that the produced melt-blown fabric is thick in the middle, thin at two sides and poor in product consistency.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a fiber collector for a melt-blown fabric production line. When the fiber collector for the melt-blown fabric production line works, the air flow velocity above the air extracting box is uniform, so that the fiber quantity collected at each position of the grid conveyer belt is uniform, the thickness consistency of the produced melt-blown fabric is good, and the gram weight of each part is basically consistent.

The technical scheme of the invention is as follows: the fiber collector for the melt-blown fabric production line comprises a grid conveyor belt device, an open air pumping box is arranged in the grid conveyor belt device, and the air pumping box is connected with an exhaust fan through a pipeline; an air equalizing assembly is arranged in the air pumping box and comprises an upper air guide grid and a lower air guide grid arranged below the upper air guide grid; the upper air guide grids comprise a pair of upper air guide grid mounting plates for fixing the upper air guide grids in the air extraction box and a group of trapezoidal grid bars uniformly arranged between the two upper air guide grid mounting plates; the lower air guide grids comprise a pair of lower air guide grid mounting plates for fixing the lower air guide grids in the air extraction box and a group of inverted trapezoidal grid bars uniformly arranged between the two lower air guide grid mounting plates; the trapezoidal grid strips and the inverted trapezoidal grid strips are arranged in a staggered mode.

Compared with the prior art, the air equalizing component with a specific structure is arranged in the air draft box of the fiber collector, and tests show that in the production process, the air flow rate above the air draft box is uniform, the fiber quantities received by different areas of the grid conveyor belt device are consistent, so that the produced melt-blown fabric product is uniform in thickness, the gram weights of all the parts are basically consistent, and the quality is good.

In the fiber collector for the melt-blown fabric production line, the lower end of the trapezoid grid bars is lower than the upper end of the inverted trapezoid grid bars; the distance D1 between the lower end of each trapezoid grid bar and the bottom of each inverted trapezoid grid bar is 80% -120% of the distance D2 between every two adjacent inverted trapezoid grid bars. Further, the distance D2 between two adjacent inverted trapezoidal grid bars is 1-3 cm.

Preferably, in the fiber collector for a meltblown fabric production line, the upper air guide grid mounting plate and the lower air guide grid mounting plate may be fixedly coupled to the air suction box by screws. The threaded connection reliability is high, and is detachable, and the cleaning of the upper air guide grid and the lower air guide grid is convenient.

Drawings

FIG. 1 is a schematic diagram of a particular application of a meltblown manufacturing line using a fiber collector of the present invention to construct a manufacturing line;

fig. 2 is a schematic structural view of an upper air guiding grille according to the present invention;

FIG. 3 is a front view of the upper air deflection grill of the present invention;

fig. 4 is a sectional view of the upper air guide grill in fig. 3 taken along the direction a;

fig. 5 is a sectional view of the upper air guide grill in fig. 3 in the direction B;

fig. 6 is a schematic structural view of a lower air guiding grille according to the present invention;

FIG. 7 is a front view of the lower air grid of the present invention;

fig. 8 is a cross-sectional view of the lower air guide grill of fig. 7 in the direction of C;

fig. 9 is a cross-sectional view of the lower air guide grill of fig. 7 taken along direction D;

fig. 10 is a schematic structural diagram of the air equalizing assembly (i.e., an assembly structural diagram of the upper air guiding grille and the lower air guiding grille) in the present invention;

FIG. 11 is a front view of the air equalizing assembly of the present invention;

FIG. 12 is a cross-sectional view of the wind equalizing assembly of FIG. 11 taken along the line E.

The labels in the figures are: 1-an extruder; 2-a melt filter; 3-a metering pump; 4-a melt-blown die; 5-an air heater; 6-air compressor; 7-a fiber collector, 701-a grid conveyor belt device, 702-an air extraction box, 703-an exhaust fan, 704-an upper air guide grid, 7041-an upper air guide grid mounting plate, 7042-a trapezoidal grid strip, 705-a lower air guide grid, 7051-a lower air guide grid mounting plate and 7052-an inverted trapezoidal grid strip; 8-electrostatic electret device, 801-electret rod; 9-winding device, 901-divider; 10-a static mixer; 11-a pressure sensor; 12-a stationary gantry; 13-moving the gantry.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

The fiber collector for the melt-blown fabric production line of the present invention is used as a component of the melt-blown fabric production line. Fig. 1 shows an application example of a meltblown production line constructed using a fiber collector for a meltblown production line of the present invention, the meltblown production line in this case comprising an extruder 1, a melt filter 2, a metering pump 3 and a meltblowing die 4 connected in this order; the melt-blowing die head 4 is connected with an air compressor 6 through a pipeline by an air heater 5; a fiber collector 7 below the meltblowing die 4; referring to fig. 1-12, the fiber collector 7 includes a mesh conveyor belt device 701, an open air-drawing box 702 is provided inside the mesh conveyor belt device 701, and the air-drawing box 702 is connected with an exhaust fan 703 through a pipeline; the side part of the fiber collector 7 is correspondingly provided with a winding device 9; an air equalizing assembly is arranged in the air pumping box 702 and comprises an upper air guide grid 704 and a lower air guide grid 705 arranged below the upper air guide grid 704; the upper air guide grid 704 comprises a pair of upper air guide grid mounting plates 7041 for fixing the upper air guide grid 704 in the air pumping box 702 and a group of trapezoidal grid strips 7042 uniformly arranged between the two upper air guide grid mounting plates 7041; the lower air guide grid 705 comprises a pair of lower air guide grid mounting plates 7051 for fixing the lower air guide grid 705 in the air pumping box 702 and a group of inverted trapezoidal grid strips 7052 uniformly arranged between the two lower air guide grid mounting plates 7051; the trapezoidal grid strips 7042 and the inverted trapezoidal grid strips 7052 are arranged in a staggered manner.

In the application case of fig. 1, a static mixer 10 is arranged between the melt filter 2 and the metering pump 3. The melt filter 2 is a continuous screen-changing filter capable of changing screens without stopping. The outlet of the metering pump 3 is provided with a pressure sensor 11 electrically connected with the PLC, and the extruder 1 and the metering pump 3 are driven by a variable frequency motor controlled by the PLC. The air compressor 6, the grid conveyer belt device 701 and the winding roller of the winding device 9 are also driven by a variable frequency motor controlled by the PLC. An electrostatic electret device 8 is arranged between the fiber collector 7 and the winding device 9, and the winding device 9 has a dividing function. During production, the meltblown fabric formed on the fiber collector 7 is first electrostatically charged by the electret rod 801 of the electrostatic electret device 8, then is cut by the cutting sheet 901 of the winding device 9, and then is collected by the winding roller 902.

In the application case of fig. 1, the meltblown production line further comprises a fixed frame 12 and a mobile frame 13 with casters at the bottom; the extruder 1, the melt filter 2, the metering pump 3, the melt-blowing die head 4, the air heater 5 and the air compressor 6 are integrally arranged on the fixed frame 12; the fiber collector 7, the electrostatic electret device 8 and the winding device 9 are integrally arranged on the movable rack 13; the fixed frame 12 and the movable frame 13 are connected by a lock (the lock may be a latch lock, a lock catch, etc.). When the tool to lock adopted the hasp, be equipped with the sub-part and the female portion of hasp respectively on fixed frame 12 and the removal frame 13, during the field erection, only need will remove frame 13 and push to suitable position, let the hasp closure can, compare the parts installation of prior art, can practice thrift man-hour.

Specific example 1: in this embodiment, the lower end of the trapezoidal grid 7042 is lower than the upper end of the inverted trapezoidal grid 7052; the distance D1 between the lower end of the trapezoid grid bar 7042 and the bottom of the inverted trapezoid grid bar 7052 is equal to the distance D2 between two adjacent inverted trapezoid grid bars 7052. Two adjacent inverted trapezoidal grid bars 7052 are spaced apart by a distance D2 of 1.5 cm. The upper air guide grid mounting plate 7041 and the lower air guide grid mounting plate 7051 are fixedly connected with the air pumping box 702 through threads.

Specific example 2: unlike the embodiment 1, in this embodiment, the distance D1 between the lower end of the trapezoidal grid bar 7042 and the bottom of the inverted trapezoidal grid bar 7052 is 80% of the distance D2 between two adjacent inverted trapezoidal grid bars 7052.

Specific example 3: unlike the embodiment 1, in this embodiment, the distance D1 between the lower end of the trapezoidal grid bar 7042 and the bottom of the inverted trapezoidal grid bar 7052 is 120% of the distance D2 between two adjacent inverted trapezoidal grid bars 7052.

Specific example 4: unlike embodiment 1, the distance D2 between two adjacent inverted trapezoidal grid bars 7052 is 1 cm.

Specific example 5: unlike embodiment 1, in this embodiment, two adjacent inverted trapezoidal grid bars 7052 are separated by a distance D2 of 3 cm.

Comparative example: unlike the above examples, in this comparative example, no air equalizing member was provided inside the fiber collector 7.

The meltblown manufacturing line constructed using the fiber collector of each of the embodiments 1 to 5 and the comparative example was tested, and the grammage of each portion after the division by the dividing piece 901 was compared to determine whether the amount of fibers received by the fiber collector 7 was uniform. In the above embodiments and comparative examples, the produced meltblown sheet 901 is cut into 6 portions with a width of 20cm (the collection length of the winding drum 902 is 200m in the test), and the portions are sequentially marked as No. I, No. II, No. III, No. IV, No. V, and No. VI, and the gram weight test results are as follows:

as can be seen from the above table, the meltblown webs produced by the lines constructed with the meltblown web line fiber collector of the specific examples 1-5 are uniform and substantially uniform from part to part. Comparative example since no air equalizing component is provided, the fiber collector 7 receives less fibers at both sides and more fibers at the middle, and the maximum grammage deviation reaches 1.6 in the test. That is, the air equalizing assembly is arranged in the air extracting box 702, so that the air flow velocity above the fiber collector 7 is uniform, and the uniformity of the fibers received by the fiber collector 7 is good.

The invention leads the fiber quantity received by the grid conveyer belt device 701 of the fiber collector 7 to be uniform by arranging the air equalizing component with a specific structure in the air extracting box 702.

The above general description of the invention and the description of the specific embodiments thereof, as referred to in this application, should not be construed as limiting the technical solutions of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the protection scope of the present application according to the disclosure of the present application without departing from the structural elements of the present invention.