KR100425635B1 - The manufacturing process of thermal stable high performance regenerated veneer board and equipment therefor - Google Patents

Abstract

The present invention relates to a method for producing a heat-resistant high-strength recycled fiber plywood, and more particularly, the diffusion and removal of moisture at the same time through the high frequency heating, thermal infrared heating, thermocompression process in the manufacturing process of fiber plywood using pure waste fibers Manufacturing method of heat-resistant high-strength recycled fiber plywood with multi-stage heat treatment of fibers at a temperature between 300 ° C and 400 ° C, significantly improving the uniformity, strength, and heat resistance of the inside and outside of the recycled fiber plywood; Fiber storage dryer, thermal infrared heater, heat roller compression controller, cutting machine, high frequency heat conduction machine, hydraulic press, cooling press, automatic transfer device of fiber plywood and standard cutting machine are connected and controlled in order, so that the efficiency and productivity of the work can be dramatically improved. The present invention relates to a production facility for increased high strength recycled fiber plywood. The heat-resistant high strength recycled fiber plywood has the ripple effect of nature protection and resource saving by using only pure waste fiber as raw material, and it is characterized by excellent mechanical strength, heat insulation and sound insulation resulting from excellent heat resistance and compact structure by multi-stage heat treatment. The recycled fibrous plywood of the invention can be used as heat resistant building interior materials, building exterior materials, tiles and flooring materials.

Description

The manufacturing process of thermal stable high performance regenerated veneer board and equipment therefor}

The present invention relates to a method for producing a heat-resistant high-strength recycled fiber plywood, and more particularly, the diffusion and removal of moisture at the same time through the high frequency heating, thermal infrared heating, thermocompression process in the manufacturing process of fiber plywood using pure waste fibers The present invention relates to a method for producing a heat-resistant high-strength recycled fiber plywood, in which the fibers are heat-treated at a temperature between 300 ° C. and 400 ° C., thereby remarkably improving the uniformity, strength, and heat resistance of the interior and exterior of the regenerated fiber plywood. Fiber, the indispensable raw material of clothing, was used for the first time only natural fiber obtained from nature. However, with the development of chemical industry since the 20th century, various synthetic fibers have been developed to enrich human life.

However, most of them are non-degradable, and now human beings face serious environmental pollution caused by waste fiber.

Accordingly, recently, environmental pollution problem caused by waste fiber is perceived, and research to recycle it has been widely conducted.

U.S. Patent No. 607882 introduces a technique of mechanically decomposing waste fibers to form a nonwoven fabric after mixing, and U.S. Patent No. 3978179 uses a thermoplastic resin as a binder to improve form stability. It introduces the technology that it is possible to manufacture nonwovens.

However, all of them have no advantages other than using waste fibers, and no functionality can be expected at all, and there is no information on heat-resistant high-strength recycled fiber plywood manufactured using waste fiber. There is also no known information on manufacturing facilities.

An object of the present invention is to perform a high-frequency heating, thermal infrared heating, compression heating multi-stage heating process in the manufacturing process of recycled fiber plywood using waste fiber, impose heat resistance at the same time with partial thermal decomposition of waste fiber constituting the recycled fiber plywood It is an object of the present invention to provide a method for producing a heat-resistant high-strength recycled fiber plywood having a structure to produce a regenerated fiber plywood having enhanced strength.

1 is a cross-sectional view of the production facility of the heat-resistant high strength recycled fiber plywood of the present invention

Figure 2 is a process chart showing a method of manufacturing a heat-resistant high strength recycled fiber plywood of the present invention

Figure 3 is a view showing in detail the automatic transfer device of the present invention

The heat-resistant high-strength recycled fiber plywood manufacturing method of the present invention is the primary molding by the process of adjusting the moisture content of the waste fiber through the heating and natural drying, and passing the waste fiber through a plurality of heat rollers arranged up and down To form a sheet with a constant thickness and width, to heat the primary molded waste fiber sheet through a high frequency heater and a thermal infrared heater, and to heat the heated waste fiber sheet by compressive heating. It consists of the process of secondary molding and the process of cutting the molded fiber plywood.

In the above water content control process, the selected synthetic fiber waste fiber is ignited by passing through a rotary cotton wool machine, and passed through a thermal infrared heater, and then adjusted to have an appropriate process moisture content through natural drying in a storage tank. Silver is automatically transferred to the forming frame and the waste fiber sheet passing through the primary molding machine, and then firstly heat treated at a temperature between 200 ° C and 250 ° C using a high frequency heater, and 280 ° C to 380 using a thermal infrared heater. The secondary heat treatment is carried out for a time between 2 minutes and 20 minutes at which the thermoplastic fibers constituting the waste fibers can be sufficiently dissolved at a temperature of ℃. The secondary molding process may impart partial thermal decomposition and heat resistance of the waste fibers. 2-20 minutes at a temperature between 300 ° C. and 400 ° C. and a pressure between 10 kg / cm 2 and 30 kg / cm 2, sufficient for the waste fibers to have a dense structure. Secondary molding by pressing for a second time, and the secondary molded fiber plywood is transferred to the cutting machine through the automatic feeder to be cut to the appropriate standard, the frame of the secondary molding machine is finished again through the automatic feeder It is moved to the loading part of the fiber board so that it can be used again.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 2.

1 is a cross-sectional view of a facility for realizing a method for manufacturing a heat-resistant high-strength recycled fiber plywood of the present invention. The facility is a cylindrical rotary warping machine for separating and cutting waste fibers having a uniform length, and then burning them. It consists of a vertical storage tank (A) in which fibers are stored, a thermal infrared heater located between the carding machine and a vertical storage tank (A), and eight heat rollers for primary forming the waste fibers discharged from the storage tank (A). A primary molding machine (b), a high frequency heater (c) for heating the primary molded waste fiber sheet (c) and a thermal infrared heater (d), and a cutting for cutting the heated waste fiber sheet into sheets of a suitable size that can be loaded into a molding frame. Cutting machine (e), the height is adjusted up and down automatically, and the molding frame transferred through the traversal (bar) and the traversal (bar) to install the waste fiber sheet in the molding frame sequentially The waste fiber plywood formed through the automatic transfer device (i), the secondary molding machine (4), the cold molding machine (a), and the cooling molding machine (h), which heat-seals the waste fiber sheet mounted on the molding frame, It is composed of a mobile cutting machine (car) for cutting and loading according to the standard, and a finished product feeding device (car) for transferring and automatically loading the same. FIG. 2 shows the automatic feeding device in detail. The sheet is loaded into the frame, and the three sheets ((b) -1, (b) -2, and (b) -3) are simultaneously transferred to the secondary molding machine through the automatic height adjusting feeder of (a). (d) complete shaping is carried out, and the waste fiber plywood and frames (e) -1, (e) -2, and (e) -3 manufactured by the above-mentioned method are automatically controlled through The waste fiber plywood is moved to the standard cutter through the recycled fiber plywood collector of (e) and Is automatically transferred to the loading part of the waste fiber sheet after the primary molding through the path of (h), (i), and (j) through the rotary roller. The heat-resistant high-strength recycled fiber of the present invention using such equipment is supplied. The manufacturing method of the plywood will be described with reference to FIG. 2 below.

Screening work and other surface

50 kg of waste fibers obtained from the sewing factory are sorted, separated and cut through a cylindrical rotary spherical machine to completely disintegrate. The waste fibers are cellulose, protein, polyacryl, polyamide, polypropylene, polyester and polyvinyl alcohol One or two or more randomly selected and waste fibers having a thickness of between 5 μm-100 μm and a length of between 1 mm and 300 mm are burnt into cotton. Thermal Infrared Heat Drying and Fiber Tank Storage Drying the burnt waste fibers in this way by controlling the moisture with a thermal infrared heater and transferring them to a vertical storage tank for storage. Waste fiber of appropriate thickness flowing from the primary molding and vertical storage tanks by load is made up of waste fiber with 23% moisture content of 1.2m in width, 2.4m in length and 0.6m in thickness through the primary forming machine consisting of eight heat rollers. Prepare the constructed sheet.

High frequency heating

The sheet made of waste fibers is put into a high frequency heater and heated at a temperature of 200 ° C. for 20 minutes to reduce the moisture content of waste fibers to 2% and to increase the efficiency of the subsequent heat treatment process.

Thermal Infrared Heating and Primary Cutting and Forming Frame Loading

The high frequency heated sheet is treated with a thermal infrared furnace at a temperature of 300 ° C. for 10 minutes to completely melt the thermoplastic fibers existing inside and outside the sheet. The molten waste fiber sheet can be loaded into the forming frame through a cutting machine. The sheet is cut into appropriately sized sheets and loaded into the forming frame through the traverses, which are automatically adjusted up and down.

Secondary molding and cold forming

The waste fiber sheet, which is mounted on the forming frame and completed the thermal infrared heating process introduced by the automatic feeder, has a weight of 30 kg / cm 2 sufficient to have a dense structure of the waste fiber at a temperature of 300 ° C. through a heat press capable of compression heating. After pressing for 10 minutes under pressure, a heat-resistant high-strength recycled fiber laminate is manufactured through a cold molding machine. Standard cutting The fiber plywood thus formed is cut and loaded in accordance with the standard by moving the fiber plywood with a movable cutting machine.

Frame Auto Feed

After the production of the recycled fiber plywood, the frame used for the production of the recycled fiber plywood is supplied to the portion for loading the waste fiber after the primary molding through the automatic transfer device.

Physical property analysis of recycled fiber plywood

As a result of analyzing the physical properties of the heat-resistant high-strength recycled fibrous laminate of the present invention prepared by the above method was obtained the following data.

In general, polymers forming fibers composed of organic compounds are easily oxidized or carbonized and pyrolyzed at temperatures above 300 ° C. In this pyrolysis process, fiber-forming polymers rapidly decrease in volume and weight, and rapidly increase in carbon content. Carbon fibers that maximize heat resistance and strength that are manufactured using this principle are now widely manufactured and widely used in various industrial fields, and currently have relatively high yields of carbon fibers such as acrylic fibers, cellulose fibers, and petroleum pitch. Many heat-resistant high-strength carbon fibers have been manufactured, and the present invention is capable of producing waste fiber plywood having heat resistance and high strength by recycling waste fibers including such carbon fibers. Relate to climate and seasons This process has a moisture content of more than 15% at all times, which gives sufficient conductivity to be heated to a temperature above 300 ℃ using a high-frequency heater to uniformly dry and primary heat-treat the outside and inside of the waste fiber to an appropriate temperature. The above embodiment describes a part of the present invention in more detail, but the content of the present invention is not limited thereto.

Heat-resistant high strength recycled fiber plywood of the present invention has the ripple effect of nature protection and resource saving by using waste fiber as a raw material, it has excellent mechanical strength, heat resistance, heat insulation, sound insulation by multi-stage heat treatment, building interior materials, building exterior materials In particular, the heat resistance physically imparted in the manufacturing process is semi-permanently exerted on recycled fiber plywood, which protects human beings from fire.In addition, high frequency heating, thermal infrared heating, and compression heating It is possible to increase the efficiency of heat supply by sequentially, and it is also possible to effectively double the density of the internal structure of the regenerated fiber plywood by uniformly supplied heat. Maximize.

Claims (3)

The selected synthetic fiber waste fiber is ignited by passing through a rotary other surface machine, and passed through a thermal infrared heater to adjust to have an appropriate process moisture content, and then transferred to a storage tank for storage, and the waste roller stored in the storage tank is heated / Passed between the heat rollers of the primary molding machine disposed below, and primary molding into a waste fiber sheet having a constant thickness and width of 23% moisture content, After the primary molded waste fiber sheet is automatically transferred to the forming frame and loaded, the waste fiber sheet having passed through the primary molder is subjected to a primary heat treatment at a temperature between 200 ° C and 250 ° C using a high frequency heater, Secondary heat treatment using a thermal infrared heater at a temperature of 280 ° C to 380 ° C for a time between 2 minutes and 20 minutes to sufficiently dissolve the thermoplastic fibers constituting the waste fiber, A temperature between 300 ° C and 400 ° C, which can be transferred to the secondary molding machine together with the forming frame to impart partial pyrolysis and heat resistance, and between 10kg / cm 2 and 30kg / cm 2, sufficient to have a dense structure of the waste fiber. Second molding by pressing under a pressure of 2 to 20 minutes, The secondary molded fiber plywood is transferred to the cutting machine through the automatic transfer device and cut, and the frame of the secondary molding machine is moved back to the loading part of the primary molded fiber plywood through the automatic transfer device and used again. Method for producing a heat-resistant high strength recycled fiber plywood. delete delete