KR102505451B1 - Non-woven fabric manufacturing equipment - Google Patents

Abstract

One embodiment of the present invention provides a nonwoven fabric manufacturing apparatus which comprises: a hopper having a scraper that disperses lumps of an input fiber raw material; a fixed-quantity supply unit spraying air on the fiber raw material discharged from the hopper to disperse the same at a lower density and discharging a raw material layer accumulated on a lower side in a fixed amount; a sheet forming unit including a dividing unit that divides the raw material layer discharged from the fixed-quantity supply unit into two paths to form two sheet layers and a laminating unit that brings the two sheet layers discharged from the dividing unit into vertical contact to form a laminated sheet; a stacking unit including a slit unit that discharges the laminated sheet discharged from the sheet forming unit downward and a slit driving unit that reciprocates the slit unit horizontally, cuts the laminated sheet, and stacks the cut laminated sheet on a conveyor to form a stacked sheet; a thermo-compression unit performing thermo-compression the stacked sheet transported by the conveyor to form a nonwoven fabric; and a take-up roller taking up the nonwoven fabric discharged from the thermo-compression unit. According to an embodiment of the present invention, it is possible to provide the nonwoven fabric manufacturing apparatus which produces the nonwoven fabric of constant quality by uniformly forming the nonwoven fabric according to the input fiber raw material and types.

Description

Non-woven fabric manufacturing equipment {Non-woven fabric manufacturing equipment}

The present invention relates to a nonwoven fabric manufacturing apparatus, and more particularly, to a nonwoven fabric manufacturing apparatus for manufacturing a nonwoven fabric in which several types of fiber raw materials are uniformly mixed.

In general, nonwoven fabric refers to a member having a fabric shape in which fibers are bonded to each other by chemical action, mechanical action, or appropriate moisture and heat treatment without spinning, weaving, or knitting. The non-woven fabric may be manufactured by manufacturing a web in a thin sheet state of a fiber aggregate using short fibers or filaments as raw materials and imparting shape stability by a method of bonding the fibers themselves.

Any raw material for making nonwoven fabric can be used as long as it is fibrous, and natural fibers, synthetic fibers, regenerated fibers, and inorganic fibers such as glass or carbon fibers are used. In terms of fiber, almost all fibers such as short fibers with a length of several mm to 100 mm or long fibers with an infinite length can be used.

The manufacturing process of nonwoven fabric is largely classified into three steps. First, a web forming process may be performed to make a web by distributing and stacking fibers on a conveyor in a uniform thickness as much as possible. Second, a web bonding process may be performed in which the formed web entangles or adheres the fiber assembly so that the web has form stability by giving the web appropriate strength so that the fibers are not separated. Third, after passing through the dyeing or processing process necessary for the final use, a post-processing process in which the nonwoven fabric is completed can be performed.

Regarding the classification of nonwoven fabrics, they are generally divided into dry and wet methods depending on whether the web is formed in a dry state or a wet state. In the dry method, fibers are formed into a web state in the air, and in the wet method, fibers are dispersed in a liquid to obtain a web. Therefore, the web forming method is classified according to the matrix that disperses the fibers, that is, air and liquid. The most used dry-laid non-woven fabric is an adhesive non-woven fabric. This is to stabilize the bonding of the fibers on the web using an adhesive.

However, according to the conventional non-woven fabric manufacturing method, there is a problem in that uniform mixing is not sufficiently achieved when several types of fibers of the non-woven fabric are mixed. Due to this, when the nonwoven fabric is applied as a support, a problem may occur due to non-uniform resistance to external force depending on the position.

A technical problem to be achieved by the present invention is to provide a nonwoven fabric manufacturing apparatus that uniformly forms a nonwoven fabric according to the input fiber raw material and type to produce a nonwoven fabric having a constant quality.

The technical problem to be achieved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

In order to achieve the above technical problem, one embodiment of the present invention is a nonwoven fabric manufacturing apparatus, a hopper having a scraper for dispersing the mass of the input fiber raw material; a fixed-quantity supply unit for spraying air to the fiber raw material discharged from the hopper to disperse it at a lower density and discharging the raw material layer accumulated on the lower side in a fixed quantity; A division unit for dividing the raw material layer discharged from the quantitative supply unit into two paths to form two sheet layers, and a lamination unit for forming a laminated sheet by bringing the two sheet layers discharged from the division unit into vertical contact. a sheet forming unit comprising; A slit unit for discharging the laminated sheet discharged from the sheet forming unit downward, and a slit driver for horizontally reciprocating the slit unit and cutting the laminated sheet to laminate the cut laminated sheet on a conveyor to form a laminated sheet. a stacking unit to; a thermal compression unit for thermally compressing the laminated sheet transported by the conveyor to form a nonwoven fabric; It provides a non-woven fabric manufacturing apparatus comprising a; and a winding roller for winding the non-woven fabric discharged from the thermal compression unit.

In an embodiment of the present invention, the quantitative supply unit may include a chamber unit into which the fiber raw material from the hopper is introduced; an air nozzle for injecting air into the chamber; A light emitting unit installed on one side of the chamber unit to irradiate light to the fiber raw material floating in the inner space of the chamber unit by the air, and a light receiving unit installed on the other side of the chamber unit to receive the light emitted from the light emitting unit. an optical sensor for detecting a degree of dispersion of the fiber raw material floating in the chamber including; and a discharge unit configured to discharge the raw material layer when the dispersion degree reaches a set value according to the signal detected by the optical sensor.

In an embodiment of the present invention, the air injection of the air nozzle of the quantitative supply unit and the temperature of the thermocompression bonding unit are adjusted according to the type and mixing ratio of the fiber raw material injected into the hopper, and from the signal from the optical sensor It may further include a control unit that determines the degree of dispersion and adjusts the air injection of the air nozzle.

In an embodiment of the present invention, the discharge unit has an outlet for discharging the raw material layer at a constant thickness, and the control unit transfers the raw material layer discharged from the outlet of the discharge unit at a set speed by a conveyor to obtain a controlled density and control It can be controlled so that the raw material layer is supplied in quantity at the set thickness and speed.

According to an embodiment of the present invention, it is possible to provide a nonwoven fabric manufacturing apparatus that uniformly forms a nonwoven fabric according to the input fiber raw material and type to manufacture a nonwoven fabric having a constant quality.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the configuration of the invention described in the claims.

1 and 2 are views showing a nonwoven fabric manufacturing apparatus of the present invention.
3 and 4 are views showing a hopper.
5 to 7 are diagrams showing a fixed quantity supply unit.
8 and 9 are views showing the sheet forming unit.
10 and 11 are views illustrating a stacking unit.
12 and 13 are views showing a thermocompression bonding unit.
14 is a diagram showing a control unit.

Since the present invention may have various changes and various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, it should be understood that this is not intended to limit the present invention to the specific disclosed form, and includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals have been used for like elements throughout the description of each figure.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

1 and 2 are views showing a nonwoven fabric manufacturing apparatus 100 of the present invention. 3 and 4 are views showing the hopper 110.

The non-woven fabric manufacturing apparatus 100 of this embodiment is a device for manufacturing a non-woven fabric by receiving several types of fiber raw materials. The non-woven fabric manufacturing apparatus 100 may manufacture a non-woven fabric by dry forming a layer (web) of fiber raw materials and then laminating and compressing them. The nonwoven fabric manufacturing apparatus 100 includes a hopper 110, a quantitative supply unit 120, a sheet forming unit 130, a laminating unit 140, a thermocompression bonding unit 150, a winding roller 160, a conveyor 170, and A controller 180 may be included.

Various fibrous fiber raw materials may be put into the hopper 110 according to the use of the nonwoven fabric. Any raw material for making the nonwoven fabric can be used as long as it is fibrous, and natural fibers, synthetic fibers, regenerated fibers, and inorganic fibers such as glass or carbon fibers may be used. In terms of fiber, almost all fibers such as short fibers with a length of several mm to 100 mm or long fibers with an infinite length can be used. Non-woven fabrics can be used, for example, as filters or supports. Depending on these uses, the type and blending ratio of fibers are determined, and these fibers can be put into the hopper 110 with the type and blending ratio. The hopper 110 may include a roller-type scraper 111 as shown in FIG. 4 . Since brush-shaped protrusions are formed on the surface of the scraper 111, uniformity can be improved by scraping and dispersing the input fiber raw material. That is, the agglomerated fiber raw material may be unwound and become like cotton.

Hereinafter, each configuration will be described in detail.

5 to 7 are diagrams showing the fixed quantity supply unit 120.

The fiber raw material discharged from the hopper 110 may be introduced into the quantitative supply unit 120 . The quantitative supply unit 120 may spray and disperse air to the fiber raw material discharged from the hopper 110 . Accordingly, the fiber raw material can be dispersed at a lower density and the uniformity can be further increased.

The quantitative supply unit 120 includes a chamber unit 121 into which fiber raw materials are introduced from the hopper 110, an air nozzle 122 for spraying air into the chamber unit 121, an optical sensor 123, and a discharge unit 124. ) may be included.

The air nozzle 122 may inject high-pressure air from the lower side to the upper side of the chamber unit 121 or from the upper side to the lower side. Therefore, as the fiber raw material 3 introduced into the chamber unit 121 is further dispersed, various types of fiber raw materials are further mixed and the agglomerated parts are loosened, resulting in more uniform dispersion.

The optical sensor 123 can detect the degree of dispersion of the fiber raw material dispersed by the air nozzle 122 . For example, the photosensor 123 may include a light emitting unit 1231 and a light receiving unit 1233 . The light emitting unit 1231 is installed on one side of the inside of the chamber unit 121 to irradiate light to the fiber raw material floating in the inner space of the chamber unit 121 by air. The light receiving unit 1233 may be installed on the other side of the chamber unit 121 facing the light emitting unit 1231 to receive light emitted from the light emitting unit 1231 . The amount and distribution of light received by the light receiver 1233 may vary according to the degree to which light from the light emitting unit 1231 is dispersed by air and absorbed or scattered by the floating fiber raw material. If the degree of dispersion of the fiber raw material is small, the fiber raw material is not sufficiently dispersed finely and uniformly. In this case, there may be many areas where the light emitted from the light emitting unit 1231 passes without being hindered by the fiber raw material in the space. Therefore, the amount of light received by the light receiving unit 1233 increases, and unevenness may be large depending on the position of the light receiving unit 1233 . Conversely, when the fiber raw material is finely dispersed by air and tightly covers the space, the light from the light emitting unit 1231 is relatively uniformly blocked, absorbed, and scattered, and the amount of light received by the light receiving unit 1233 is reduced and the amount of light is reduced. Dispersion may be more uniform.

The controller 180 may receive this difference in light quantity from the optical sensor 123 . The control unit 180 may determine the dispersion degree and uniformity of the fiber raw material suspended by air in the chamber unit 121 according to a set or input program. That is, the optical sensor 123 can detect the density of the raw fiber material floating in the chamber 121 . The controller 180 may control the discharge unit 124 to discharge the raw material layer accumulated on the floor when the density of the fiber raw material detected by the optical sensor 123 reaches a reference value. When the reference value is not reached, the control unit 180 may control air to be continuously sprayed. In addition, the amount and material (type) of the fiber raw material are input in advance, and the appropriate air pressure and injection amount can be controlled by the controller 180.

The fiber raw material uniformly dispersed by the quantitative supply unit 120 may be accumulated on the upper surface of the discharge unit 124 at the bottom. The sunken raw material layer can be formed to a certain thickness and discharged at a set speed by the conveyor 170. Thus, a layer of raw material can be discharged with a controlled density, controlled thickness and set speed. That is, the raw material layer can be discharged in a fixed amount.

8 and 9 are views showing the sheet forming unit 130 .

The raw material layer transported by the conveyor 170 may flow into the sheet forming unit 130 . The sheet forming unit 130 divides the raw material layer discharged from the quantitative supply unit 120 into two paths to form two sheet layers, and the two sheets discharged from the dividing unit 131. It may include a laminated portion 132 for forming a laminated sheet by contacting the layers vertically. The raw material layers may not yet be compressed or strongly entangled with each other. As shown in FIG. 9 , the raw material layer may be branched along two paths of the dividing unit 131 and discharged as two sheet layers. In each branching path, it is primarily pressed by a roller having irregularities formed on its surface, and then the two sheet layers are overlapped up and down again by the laminating unit 132 to form a laminating sheet 31. Accordingly, the laminate sheet can maintain the sheet shape to some extent while the fibers are entangled with each other to a certain extent.

10 and 11 are views showing the stacking unit 140 .

The stacking unit 140 may include a slit unit 141 and a slit driver 142 . The slit unit 141 may discharge the laminated sheet discharged from the sheet forming unit 130 onto the upper surface of the lower conveyor 170 . The laminated sheet may be continuously discharged from the slit portion 141. The slit driving unit 142 may reciprocate the slit unit 141 in a horizontal direction. For example, as shown in FIG. 11 (a), the laminated sheet may be introduced into the stacking unit 140 while being transferred from the front to the rear. The slit driving unit 142 may reciprocate the slit unit 141 forward and backward. While the slit portion 141 is transferred from the front end to the rear end, the laminated sheet may be discharged to the surface of the conveyor 170 below. When the slit portion 141 arrives at the rear end, the cutting portion 143 installed in the slit portion 141 may cut the laminated sheet. Accordingly, a single laminated sheet may be seated on the conveyor 170. As shown in FIG. 11 (b), the slit portion 141 may be continuously transferred from the rear end to the front end while laminating the laminated sheet and cutting the laminated sheet at the front end. In this way, cutting and stacking of the laminated sheet may be repeated. When the set number of sheets is stacked, the conveyor 170 operates so that the stacked sheets 33 may flow into the thermocompression bonding unit 150 .

12 and 13 are diagrams showing the thermocompression bonding unit 150 .

The thermocompression bonding unit 150 may include a large diameter heating roller 151 and a plurality of guide rollers 152 . A hot wire may be installed in the heating roller 151. The controller 180 may control the surface temperature of the heating roller by controlling power supplied to the heating wire. The laminated sheet 33 passes through the heating roller while being compressed by the guide roller. Accordingly, the laminated sheet may be thermally compressed to form a compressed sheet, that is, the nonwoven fabric 35 . The nonwoven fabric may be wound by a winding roller 160 .

14 is a diagram showing the control unit 180.

The control unit 180 controls the air injection of the air nozzle 122 of the quantitative supply unit 120 and the temperature of the thermocompression bonding unit 150 according to the type and mixing ratio of the fiber raw material put into the hopper 110, and the optical sensor The state of mixing and dispersing is judged from the signal (sensed value) from 123, and the conveyor 170 can be controlled.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

100: non-woven fabric manufacturing device
110: Hopper
111: scraper
120: quantitative feeder
121: chamber part
122: air nozzle
123: light sensor
1231: light emitting unit
1233: light receiving unit
124: discharge unit
130: sheet forming unit
131: divider
132: lamination part
140: stacking unit
141: slit portion
142: slit drive unit
143: cutting part
150: thermocompression bonding unit
151: heating roller
152: guide roller
160: winding roller
170: conveyor
180: control unit

Claims (4)

In the nonwoven fabric manufacturing apparatus,
A hopper having a scraper for dispersing the mass of the input fiber raw material;
a quantitative supply unit for dispersing the fiber raw material discharged from the hopper at a lower density by spraying air and discharging the raw material layer accumulated on the lower side in a quantitative amount;
A division unit for dividing the raw material layer discharged from the quantitative supply unit into two paths to form two sheet layers, and a bonding unit for forming a laminated sheet by bringing the two sheet layers discharged from the division unit into vertical contact. a sheet forming unit comprising;
A slit unit for discharging the laminated sheet discharged from the sheet forming unit downward, and a slit driver for horizontally reciprocating the slit unit and cutting the laminated sheet to laminate the cut laminated sheet on a conveyor to form a laminated sheet. a stacking unit to;
a thermal compression unit for thermally compressing the laminated sheet transported by the conveyor to form a nonwoven fabric; and
Characterized in that it comprises a, non-woven fabric manufacturing apparatus; a winding roller for winding the non-woven fabric discharged from the thermal compression unit.
The method of claim 1,
The quantitative supply unit,
a chamber into which the fiber raw material from the hopper is introduced;
an air nozzle for injecting air into the chamber;
A light emitting unit installed on one side of the chamber unit to irradiate light to the fiber raw material floating in the inner space of the chamber unit by the air, and a light receiving unit installed on the other side of the chamber unit to receive the light emitted from the light emitting unit. an optical sensor for detecting a degree of dispersion of the fiber raw material floating in the chamber including; and
Nonwoven fabric manufacturing apparatus comprising a; discharge unit for discharging the raw material layer when the degree of dispersion reaches a set value by the signal detected by the optical sensor.
The method of claim 2,
Air injection of the air nozzle of the quantitative supply unit and the temperature of the thermal compression unit are adjusted according to the type and mixing ratio of the fiber raw material put into the hopper, and the degree of dispersion is determined from the signal from the optical sensor. Characterized in that, the non-woven fabric manufacturing apparatus further comprises; a controller for controlling the air injection of the air nozzle.
The method of claim 3,
The discharge unit has an outlet for discharging the raw material layer at a constant thickness, and the control unit transports the raw material layer discharged from the outlet of the discharge unit at a set speed by a conveyor so that the raw material layer has a controlled density, a controlled thickness, and a set speed. A nonwoven fabric manufacturing apparatus characterized in that it is controlled so that the quantity is supplied.

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