KR20040058649A - Manufacturing system using used chemical fiber and plate foamed by the system - Google Patents

Abstract

PURPOSE: A preparing system of extrusions using a waste synthetic fiber and a board for building materials formed thereby are provided to utilize a waste product and to have the good mechanical property. CONSTITUTION: The preparing system of extrusions using a waste synthetic fiber comprises a slicing part(10) to cut the waste synthetic fibers into a small cloth piece; a kneading part to make the fibers into a steric form; a mixing part(40,50) to input an auxiliary material and mix with the waste synthetic fiber; a melting part(60) of a first melting part to and a second melting part; an extruding part(70); a cooling part(80); and a tailoring part(110). The first melting part melts the mixed material partially by increasing the temperature firstly by the high pressure. The second melting part melts the material at the temperature of 200 to 250 deg.C by adding an outer heating source.

Description

Manufacturing system for extrusion molding using waste synthetic fiber and board for building material molded by the same {Manufacturing system using used chemical fiber and plate foamed by the system}

The present invention relates to a board using waste chemical fibers and a manufacturing system thereof, and more particularly, after adjusting the mixing ratio of the waste chemical fibers supplied to a compounding ratio that is easily melt-extruded, the raw material is extruded to have a shape like plywood A system for manufacturing a board and a board manufactured by the system.

Disclosed are various plywood-like building materials including building exterior materials and interior materials. A method of manufacturing a board using waste materials such as fibers has been proposed in place of conventional wood plywood. However, too much emphasis on functionality was not satisfactory in strength and workability.

Meanwhile, conventionally, a plywood manufactured using waste synthetic fibers has been supplied by a press method, which is vulnerable to moisture and has disadvantages in mechanical properties such as strength. That is, since waste synthetic fibers contain a lot of cotton yarn in their components, they are pressed or combusted without enduring high temperatures of 200 ° C or more necessary for molding. . Thus, the existing recycling method mainly relied on industrial synthetic resins, not clothing fibers.

In accordance with the above problems, the present invention is to provide a useful building material utilizing waste, and furthermore, an object of the present invention is to provide a building material with excellent mechanical properties, such as to obtain a satisfactory strength at light weight. Furthermore, an object of the present invention is to provide a system for melting and remolding waste synthetic fibers for clothing containing a large amount of cotton.

1 is a block diagram illustrating a system according to the present invention.

2 is a system configuration diagram schematically showing each device.

Explanation of symbols on the main parts of the drawings

10; Segment 20; Drying part

30; Auxiliary raw material supply 40; Mixing

50; Mixing section 60; Melting part

70; Extrusion section 80; Cooling section

90; Collecting part 100; Playback

110; Cutting 120; Export

The above purpose, the cut section for cutting the waste synthetic fibers to be a small piece of cloth as the main raw material; A kneading unit for making a three-dimensional shape of the waste synthetic fiber cut into pieces of cloth; An auxiliary raw material mixing part for adding a secondary raw material such that a thermoplastic resin such as vinyl is 70% or more of the total weight by referring to the fiber mixing ratio of the waste synthetic fiber and mixing the waste synthetic fiber; Melting part consisting of a primary melting part for partially melting the mixed raw material by raising the temperature primarily by high pressure and a secondary melting part for secondary melting in a temperature environment of 200 ° C. to 250 ° C. by adding an external heat source. ; An extrusion unit for discharging the mixed raw material supplied in a molten state into a desired cross-sectional shape through an extrusion mold; A board manufacturing system using waste synthetic fibers is characterized by comprising a cooling section for cooling the extruded hot extrudate and a cutting section for cutting to the desired width and length.

According to a feature of the present invention, the primary melting part has a relatively large diameter and is composed of a first screw and a first cylinder having a narrower pitch in the advancing direction, thereby applying a high pressure to the mixed raw material by rotation to naturally increase the temperature. And; The secondary melting part is composed of a second screw and a second cylinder having a relatively small diameter with respect to the first screw, so that the mixed raw material is raised to the melting temperature by supplying heat to the second cylinder from an external heat source do.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 is a block diagram showing a board manufacturing system according to the present invention. 2 is a system configuration diagram schematically showing each device.

The collected waste synthetic fibers (M1) is the main raw material, in addition to the vinyl (M2) provided in the form of a fillet (fillet) is used as a secondary raw material. Auxiliary raw materials are determined based on the fiber mixing ratio of the main raw materials obtained in advance.

The main raw material is first finely cut to a size of about 15 mm to 20 mm by the cutting section 10, and then put into the heated drying unit 20 and dried. In this process, foreign metals are detected and removed by the metal detector 16 while being transported through the conveyor 12. The pulverized main raw material is quantitatively supplied to the mixing unit 30 via the weight scale 18.

For example, a main raw material having a fiber mixing ratio of 60% by weight of synthetic fibers such as polyester (PE), polypropylene (PP) or nylon, and 40% by weight of natural fibers such as wool may be selected. . Alternatively, a blend of about 80% by weight of other chemical fibers and about 20% by weight of cotton or wool may be used as the main raw material. Information on such fiber mixing rate can be obtained when procuring the main raw material and entered into the control system of the present invention.

The main raw material M1 supplied, that is, the fiber mixing rate of the waste synthetic fibers, is a criterion for determining the input amount of the auxiliary raw material M2 stored in the silos 32 and silo. That is, the auxiliary raw material supply unit 40 inputs the auxiliary raw material to the mixing unit 30 according to this input amount. The vinyl selected as the auxiliary material (M2) is provided in the form of a fillet, which is intended to improve extrusion molding, and a preferred blending ratio of the mixed material is 25 to 35% by weight of natural fibers such as cotton and wool. (More preferably 30% by weight), the thermoplastic resin, such as polypropylene (PP), polyethylene (PE), nylon or vinyl, about 65% to 75% by weight (more preferably 70% by weight) in the molding operation Make sure there are no problems.

The kneading unit 40 is a process for more uniformly mixing the mixed raw material blended in a constant component ratio in the mixing unit 30 as the pretreatment process of extrusion molding, and pretreatment of the main raw material in a small cloth state so as to have good moldability. By kneading, the sheet-shaped pieces of waste synthetic fibers are rolled round to form a three-dimensional shape similar to a fillet. This is to ensure good mixing with the auxiliary material and to reduce the wear of the subsequent machine and to allow the screw to pass well in the melt section described later.

The kneading unit (Press Kneader) is mixed by rotating the two kneading shafts to each other while being pressed by an air cylinder, and heats the interior to a predetermined temperature by an indirect heating method to circulate the heat medium.

Dust or gas generated in the kneading unit 40 is removed by a dust collector 90. The collecting unit 90 is composed of a predetermined duct and a blower, and is also shared by the cutting unit 110 described later. For reference, the subsequent system after the mixing section consists of several identical lines L1, L2, L3 connected in parallel. Only one line L1 is shown in FIG.

The mixed raw material is output in the form of a sheet through the melted portion 60, which is the core of the present invention, and the extruded portion 70 that is subsequently installed. The melter 60 is composed of primary and secondary melters 62 and 64. The key point of the present invention is to prevent the main raw material (M1) containing part of natural fibers such as cotton or wool from burning or crushing at a high melting temperature of 200 ° C to 250 ° C, which is a general melting temperature of thermoplastic resins. It is to melt. That is, melt extrusion is impossible because cotton burns when heated to the above temperature under normal environmental conditions. The present invention eliminates these problems and provides a system that maintains the properties of cotton fibers at high temperatures and melts and forms only thermoplastic resins.

To this end, the molten portion is applied to the primary melt portion 62, which naturally raises the temperature from 70 ° C to 90 ° C by applying a high pressure, and to the secondary melt portion 64, which is secondarily heated and melted using a high pressure and an external heat source. It is composed.

Each melt portion 62, 64 is composed of a first and a second cylinder and a first and a second screw rotated in the cylinder and conveying the object to be conveyed. Each screw is rotated at low speed by an inverter DC motor and a reducer. The first screw used in the primary melt portion 62 has a diameter of about 250 cm (about 10 "), and the secondary melt portion 64 has a second screw having a diameter of about 200 cm (about 8"). Used. As the blade of each screw advances, the pitch narrows, thereby increasing the pressure of the conveyed object, that is, the mixed material. The pressure of the primary melt reaches about 1000 tons, and in this process, the temperature of the mixed raw material is naturally raised and partially melted. The radius of the second screw constituting the secondary melt is relatively smaller than that of the first screw, to evacuate the inside of the melt to prevent combustion or depression of the face. Each melter is provided with means for removing moisture generated therein to suppress bubble generation.

As the external heat source for heating the secondary melt part, a method using a heat medium oil or a heat transfer coil may be selectively employed, but at least it should be possible to maintain the set temperature accurately.

The extrusion part 70 is installed after the melting part. The extrusion unit includes a thickness adjusting roller for precisely adjusting the thickness of the extruder and the product. The extruded portion and subsequent processes described below are similar in structure and operation to a typical extrusion machine for producing vinyl paper and the like. In addition, the following describes only a process for forming a board, but can be replaced with various moldings such as rods, pipes (pipe).

The thickness and width of the plate are determined by the mold 71 (T-die) provided after the melting section. The temperature of the mold should be kept constant, where electric heater heating is used and the mold is controlled to a certain temperature by a temperature sensor.

The sheet-like raw material which passed the extrusion part 70 is adjusted thickness precisely. A polishing roller 72 for adjusting the thickness, a first take-off roller 74 for drawing out at a constant speed and pressure, and a track conveyor device 76 provided therebetween. Passing through the polishing roller 72 is molded to the thickness of the desired product and the sheet surface is finished. In other words, the roller is pressed while compressing the sheet surface to produce a sheet having a required specification. The inside of the polishing roller 72 is maintained at a desired temperature by the heat medium oil supplied from the heating part, and the inside of the roller is configured as a double jacket to maintain a precise temperature. By adjusting the gap between the rollers, the thickness of the sheet can be set finely.

The track conveyor device 76 is a device for cooling the sheet passing through the polishing roller 72 and transporting the sheet to the rear end. Cooling fans are installed at upper and lower portions to increase cooling efficiency. A first take-up roller 74 is provided at the rear end of the track conveyor device 76 to pull out the sheet from the polishing roller 72, and is composed of a rubber coated roller to prevent slipping. The roller is rotated by the DC motor, and has a structure capable of circulating the coolant therein.

The sheet drawn out in the state where the thickness is adjusted is cut into the desired width and length by the cutting portion 110. Cutting portion 110 is composed of a width cut portion 112 and the length cut portion 114. The cutting operation is performed by a rotary saw blade, and a collecting unit 90 for collecting dust generated during cutting is used.

The regeneration unit 100 (see FIG. 1) is installed at an adjacent point of the width cutting unit to crush and remove the residue generated from the cutting unit, especially the width cutting unit for cutting the width, and the collected and pulverized residue is mixed and kneaded again. It is injected into the unit 50 to be reprocessed.

The sheet having passed through the width cutting part 112 is fed into the cooling part 80 by the second take-up roller 116. The cooling unit 80 includes a heating dryer 82 and a cooling dryer 84. The temperature of the sheet cooled to some extent by exiting the extrusion passes through the heat dryer 82 and the surface is heated to a temperature of about 70 [deg.] C. and subsequently passed through the installed cool dryer 84 to cool again again.

This is a process of improving the mechanical properties of the sheet by stretching and annealing the sheet. The sheet is taken out in a strongly pressed state by the second take-up roller 116 provided at the rear end. The heat dryer is configured inside the elongated housing for thermal insulation, and operates to circulate the hot air heated by the electric heater. This process is to maintain smoothness, which is a characteristic that is important for a given sheet. This is also a technique taken in the general molding process.

Means for adhering the protective film F to the surface of the sheet may be provided in the second take-up roller 116. That is, the protective film is installed to be engaged with the second take-up roller and rotated, and is released from the film unwinder according to the rotation thereof and adhered to the sheet surface. The protective film F may be selectively provided on both surfaces or one surface of the sheet.

The finished sheet that has passed through the cooling section 80 passes through the length cut section 114 and is cut to the length of the desired specification. The cutting operation also uses a rotary saw blade and is provided with means for collecting the dust generated. As a side note, a clamp mechanism that starts with an air cylinder is used to prevent product fluctuations during cutting. The cut sheet is carried out in a packaged or printed state by the carrying out unit 120.

Those skilled in the art may make various modifications within the scope of the technical idea of the present invention with reference to the disclosed contents. For example, the mixing ratio of the waste synthetic fiber to the components of the mixed raw material exemplified above may be changed to some extent depending on the design environment. Details after the extruded portion is not essential to the present invention and may be sufficiently modified. Occasionally, the molding system of the present invention may be machined in the form of a plate, i.

By the above configuration, it is lightweight, has a desired mechanical strength, and provides a reliable building material. This can contribute greatly to industrial development by using recycled materials called waste synthetic fibers. According to the present invention, there is provided a means for melt extrusion molding a part of waste synthetic fibers containing natural fibers such as cotton, which tend to lose their properties at high temperatures. This provides an opportunity to recycle clothes that are disposed of in large quantities as industrial products.

Claims (3)

Cutting section for cutting the waste synthetic fibers to be a small piece of cloth as the main raw material; A kneading unit for making a three-dimensional shape of the waste synthetic fiber cut into pieces of cloth; An auxiliary raw material mixing part for adding a secondary raw material such that a thermoplastic resin such as vinyl is 70% or more of the total weight by referring to the fiber mixing ratio of the waste synthetic fiber and mixing the waste synthetic fiber; Melting part consisting of a primary melting part for partially melting the mixed raw material by raising the temperature primarily by high pressure and a secondary melting part for secondary melting in a temperature environment of 200 ° C. to 250 ° C. by adding an external heat source. ; An extrusion unit for discharging the mixed raw material supplied in a molten state into a desired cross-sectional shape through an extrusion mold; An extrusion molding production system using waste synthetic fibers comprising a cooling unit for cooling the extruded high-temperature extrudate and a cutting unit for cutting to a desired width and length. The method of claim 1, wherein the primary melting portion is composed of a first screw and a first cylinder having a relatively large diameter and a pitch narrowing toward the running direction by applying a high pressure to the mixed raw material by rotation to naturally increase the temperature And; The secondary melting portion is composed of a second screw and a second cylinder having a relatively small diameter with respect to the first screw, so that the mixed raw material is raised to the melting temperature by supplying heat from an external heat source to the second cylinder Extrusion molding production system using waste synthetic fibers, characterized in that the. By mixing the auxiliary material (M2) such as vinyl with the main material (M1), which is a waste synthetic fiber, 65 to 75% by weight of thermoplastic resin such as polypropylene (PP), polyethylene (PE), nylon or vinyl, cotton (綿) Natural fiber, such as wool (wool) is composed of about 25% to 35% by weight of components, melted at a temperature of about 200 ℃ to 250 ℃ for extrusion of plate-shaped building materials for building materials board.