KR-20260064864-A - Recycling System for Waste PVC Sheets

Abstract

The present invention relates to a sheet manufacturing system for recycling waste PVC designed to produce high-quality recycled sheets through the processes of crushing, stirring, molding, cooling, and cutting of discarded PVC, comprising: a PVC crushing device for crushing collected waste PVC; a stirring device for uniformly stirring the crushed material produced by the PVC crushing device; a molding device for melting the stirred material produced by the stirring device and extruding it into a sheet shape; a cooling device for receiving and cooling the sheet-shaped molded material formed by the molding device; a sheet manufacturing device for manufacturing a sheet by heating and pressurizing the sheet-shaped molded material cooled by the cooling device; and a sheet cutting unit for cutting the sheet manufactured by the sheet manufacturing device according to specifications.

Inventors

• 오경자

Assignees

• 오경자

Dates

Publication Date

20260508

Application Date

20241029

Claims (5)

1. PVC crushing device for crushing collected waste PVC; A stirring device for uniformly stirring the crushed material produced by the above-mentioned PVC crushing device; A molding device that melts a stirred material produced by the above stirring device and then extrudes it into a sheet shape; A cooling device that receives and cools a sheet-shaped molded product formed in the above-mentioned molding device; A sheet manufacturing device for manufacturing a sheet by heating and pressurizing a sheet-shaped molded product cooled in the above-mentioned cooling device; and A sheet manufacturing system for recycling waste PVC, comprising: a sheet cutting unit that cuts a sheet manufactured by the above sheet manufacturing device according to specifications.
2. In paragraph 1, The above sheet manufacturing device is, A sheet conveying unit that continuously conveys a sheet-shaped molded product cooled in the above cooling device; A sheet heating unit installed spaced upward from the sheet conveying unit and heating a sheet-shaped molded product being conveyed along the sheet conveying unit; A first pressure roller installed on the lower side of the transfer path of the sheet-shaped molded product in the above sheet transfer section; and A sheet manufacturing system for recycled waste PVC comprising: a second pressure roller installed in close contact with the upper side of the first pressure roller, and which presses a sheet-shaped molded product fed between the first pressure roller and the second pressure roller while rotating to manufacture it into a sheet.
3. In paragraph 2, The above sheet heating unit is, A heating body extending horizontally to the left and right so as to be perpendicular to the conveying direction of the sheet-shaped molded product, and installed spaced upward from the sheet conveying part; An air supply tank installed on one side of the heating body to supply compressed air to the heating body; An air transfer channel extending horizontally along the inner side of the heating unit body to transmit air supplied from the air supply tank; and A sheet manufacturing system for recycling waste PVC, comprising: a plurality of rotating heating units connected and installed at regular intervals along the lower side of the heating unit body so as to be rotatable, which heat compressed air supplied from the air movement channel and then spray it toward the direction of the sheet-shaped molded product being transported.
4. In paragraph 3, The above rotary heating unit is, A heating member installation groove formed hollowly on the inner side of the heating member body while forming an opening on the lower side of the heating member body; A heating body formed in a circular spherical shape and connected to be rotatably installed in the heating unit installation groove; An air outlet installed in the air movement channel adjacent to the heating unit installation groove to discharge moving air; An air transfer pipe made of a material capable of expansion or contraction, installed between the air outlet and the upper side of the heating body so as to transfer air discharged through the air outlet; A cutting tube fastening bearing rotatably connected and installed on the upper side of the heating body to fasten the lower side of the air transmission tube; A hollow groove formed hollowly on the inner side of the above heating body; An air passage formed by passing through the above hollow groove and penetrating the heating body in the vertical direction, which allows air introduced through the air transfer pipe to pass through the above hollow groove and then discharge it to the lower side of the heating body; A heating element installed on the inner side of the hollow groove to heat the air moving along the hollow groove; A ring movement groove extending in a circular ring shape along the circumference of the heating unit installation groove on which the heating unit body is seated; A driving ring formed in a circular ring shape corresponding to the shape of the ring moving groove and connected and installed to be rotatable in the ring moving groove; A ring drive gear installed to be rotatable on the inner side of the heating body, connected by engaging with a gear thread formed along the outer surface of the drive ring through gear coupling to drive the drive ring; A rotary drive wheel that is connected and installed to one side of the heating body so as to enable rotational driving, wherein the end is exposed from the heating body and is seated in a wheel movement groove formed extending in an up-and-down direction along the inner surface of the drive ring, and is connected and installed by engaging with gear teeth formed in an up-and-down direction along the inner side of the wheel movement groove through gear coupling, and moves together as the drive ring rotates to rotate the heating body in correspondence with the rotation direction of the drive ring, and rotates the heating body by moving in an up-and-down direction along the wheel movement groove as it rotates on its own; A pin fastening groove extending along one side and the other side of the wheel movement groove; and A sheet manufacturing system for recycled waste PVC comprising: a connecting pin that is installed by passing through a rotary drive wheel that is exposed from the heating unit body and seated in the pin fastening groove, with one side and the other side seated in the pin fastening groove so as to be movable in the up and down direction along the pin fastening groove, and which prevents the rotary drive wheel from being separated from the pin fastening groove as the rotary drive wheel rotates and moves in the up and down direction along the pin fastening groove.
5. In paragraph 4, The above heating body is, An upper body formed in a circular spherical shape, connected and installed rotatably in the heating unit installation groove, and having an air movement passage extending in the vertical direction; A lower body formed by cutting and separating the lower end of the upper body exposed from the heating unit installation groove in a horizontal direction, and wherein the air movement passage is extended in an up-and-down direction; A plurality of bar seating grooves formed by being recessed from the lower side of the upper body on which the lower body is seated; A plurality of guide bars installed upright on the upper side of the lower body so as to be seated in the bar seating groove and to induce vertical movement of the lower body; A body extension portion formed by extending in a cylindrical pipe shape from the upper side of the lower body while surrounding the air passage and inserted and seated inside the upper body forming the air passage; and A sheet manufacturing system for recycled waste PVC comprising: a lifting gear installed to enable rotational driving on the inner side of the upper body, connected by engaging with gear teeth formed in the vertical direction along the outer surface of the body extension by gear coupling, and rotated in the forward or reverse direction to move the body extension in the vertical direction.

Description

Recycling System for Waste PVC Sheets The present invention relates to a technology for manufacturing sheet-type products by recycling waste PVC, and more specifically, to a system for manufacturing sheets using recycled waste PVC designed to produce high-quality recycled sheets through the processes of crushing, stirring, molding, cooling, and cutting of discarded PVC. Polyvinyl chloride (PVC) is widely used in various industrial fields due to its excellent durability, strength, and chemical resistance; however, recycling is essential because its disposal has a significant environmental impact. In particular, PVC must satisfy specific conditions during recycling to maintain quality. During this process, it is crucial to process the material into uniformly sized crushed particles, stir it to ensure even melting, and perform stable molding and cooling. Conventional technologies have faced issues with PVC deformation and quality degradation during the crushing and molding processes, and various attempts have been made to resolve these problems. However, existing recycling methods are complex and inefficient, making actual commercialization difficult. Consequently, there is a demand for technology that can simultaneously ensure both the quality and production efficiency of sheet products. Meanwhile, the aforementioned background technology is technical information that the inventor possessed for the derivation of the present invention or acquired during the process of deriving the present invention, and it cannot necessarily be considered publicly known technology disclosed to the general public prior to the filing of the present invention. FIG. 1 is a diagram showing the schematic configuration of a sheet manufacturing system that recycles waste PVC according to one embodiment of the present invention. Figure 2 is a drawing showing the sheet manufacturing device of Figure 1. Figure 3 is a drawing showing the sheet heating section of Figure 2. Figure 4 is a drawing showing the rotating heating unit of Figure 3. Figure 5 is a drawing showing the heating body of Figure 4. Figures 6 and 7 are drawings showing the heating element of Figure 4. The following detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. It should also be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the invention is limited only by the appended claims, including all equivalents to those claimed therein, provided appropriately described. Similar reference numerals in the drawings refer to the same or similar functions across various aspects. Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a diagram showing the schematic configuration of a sheet manufacturing system that recycles waste PVC according to one embodiment of the present invention. Referring to FIG. 1, a sheet manufacturing system (10) for recycling waste PVC according to one embodiment of the present invention includes a PVC crushing device (100), a stirring device (200), a molding device (300), a cooling device (400), a sheet manufacturing device (500), and a sheet cutting unit (600). The PVC crushing device (100) is a device that crushes collected waste PVC to provide crushed material, and crushes the PVC into small particles to make recycling easier. The stirring device (200) serves to uniformly stir the crushed material produced by the PVC crushing device (100), thereby making it into a state where it can be evenly melted in the molding process. The molding device (300) is a device that melts the stirred material produced by the stirring device (200) and then extrudes it into a sheet shape, thereby producing a sheet-shaped molded product (P) of uniform thickness. The cooling device (400) receives the sheet-shaped molded product (P) formed in the molding device (300) and cools it so that the molded product in a high-temperature state can be converted into a stable state. The sheet manufacturing device (500) is a device that manufactures a sheet by heating and pressing a sheet-shaped molded product (P) cooled in a cooling device (400), thereby maintaining the strength and thickness of the recycled PVC uniformly. The sheet cutting section