Quantitative weighing system for recycled plastic raw materials

Abstract

The present invention relates to a quantitative weighing system for recycled plastic raw materials, comprising: a scrap storage unit (110) for individually storing multiple types of recycled plastic scrap raw materials with different physical properties; a plurality of scrap transfer lines (120a~120f) mounted on one side of the scrap storage unit (110) and connected 1:1 with individual scrap raw material weighing hoppers (130a~130f) assigned to each raw material to transport the scrap raw materials; a plurality of scrap raw material weighing hoppers (130a~130f) connected 1:1 with the scrap transfer lines (120a~120f) to receive each scrap raw material and quantitatively weigh and discharge it according to a preset recipe; a weighing raw material packaging module (140) that continuously installs a conveyor module (141) below the plurality of scrap raw material weighing hoppers (130a~130f) and packages the quantitatively weighed raw materials into a single package; and a scrap storage unit to The system is characterized by being configured to include a digital control module (150) that individually controls the overall operation of the weighing raw material packaging modules (110~140) in a digital manner, thereby providing a digital-based raw material weighing system that can improve quality and productivity.

Description

Technology Field

[0001] The present invention relates to a quantitative weighing system for recycled plastic raw materials, and more specifically, to a technology for implementing a digital-based quantitative weighing system for raw materials applied to the manufacturing process of recycled polymer composite materials, the demand of which is increasing due to eco-friendly industrialization such as various electronic products and electric vehicles, in order to improve quality and productivity. Background Technology

[0002] Due to the rapid development of industries related to electronic products and electric vehicles in recent years, the demand for recycled polymer composite materials used as manufacturing raw materials is increasing.

[0003] Furthermore, advanced countries such as those in Europe, which are actively promoting eco-friendly policies in related industrial sectors, are mandating the use of recycled materials to enhance resource efficiency; consequently, the development of technologies to replace virgin materials with recycled materials is actively underway.

[0004] Generally, the process for manufacturing recycled polymer composite materials used in the production of final products from recycled plastic scrap raw materials consists of the following steps: collecting various types of plastic scrap raw materials, separating foreign substances, and washing; cutting and crushing the scrap raw materials into a specific size; melting and extruding the scrap raw materials and processing them into recycled pellets or chips; and manufacturing recycled polymer composite materials using the recycled pellets or chips and supplying them to the final product manufacturer.

[0005] As an example of a previously known technology related to recycled polymer manufacturing technology, Korean Registered Patent No. 10-1548048 comprises a method for manufacturing a synthetic resin composition comprising: a mixing step for forming a mixture comprising an impact modifier, a compatibilizer, a lubricant, and an antioxidant; a heating and extraction step for heating the mixture and extracting it with an extruder; a pellet step for forming the extracted extract into pellets; and a drying step for drying the pellets.

[0006] As another example, Korean Registered Patent No. 10-0566065 comprises a method for manufacturing recycled plastic pellets using waste plastic, comprising: a collection step for collecting composite PP, PE compound, ABS, PVC, engineering plastic, and thermoplastic resin; a classification step for classifying the collected waste plastic based on type and color; a crushing step for crushing the waste plastic, after measuring hazardous substances within the classified waste plastic, into 1mm to 15mm; a drying step for washing the waste plastic by mixing a detergent such as sodium phosphate or polysodium phosphate with water, and then drying it in a bag with white phosphorus pentoxide powder; a first extrusion step for decolorizing the washed waste plastic and removing environmental hazardous substances; a second extrusion step for coloring the decolorized waste plastic from the first extrusion step into various colors and reinforcing its physical properties; a product production step for producing a product using the waste plastic that has undergone physical property testing; and a product packaging step. Prior art literature

[0007] Korean Registered Patent No. 10-1548048 (2015.08.28) Korean Registered Patent No. 10-0566065 (2006.03.30) Korean Registered Patent No. 10-0965697 (2010.06.24) Korean Registered Patent No. 10-2145601 (2020.08.19) The problem to be solved

[0008] The manufacturing process of recycled polymer composite materials using recycled plastic scrap raw materials according to the prior art described above is carried out by collecting and washing the plastic scrap raw materials, cutting and crushing them, melting and extruding them to process them into pellets or chips, and then using these to manufacture recycled polymer composite materials.

[0009] In other words, in conventional technology, recycled pellets produced by primary melting and extrusion are used as a base material and supplied to an extruder. While this has the advantage of consistent specific gravity and particle size among the pellets, various foreign substances or other resins are mixed into the primary pellet raw material, causing a deterioration in physical properties. Furthermore, the manufacturer of the final product cannot verify the type of original scrap or whether other synthetic resins have been introduced from the primary pellets, making it difficult to respond actively when defects occur.

[0010] Therefore, in order to resolve this problem, it is necessary to configure a supply system that, instead of using primary manufactured pellets as in conventional technology, supplies each plastic scrap raw material obtained from the cutting and crushing process to the manufacturing process of the composite material, and then manufactures a recycled polymer composite material after undergoing a mixing step based on quantitative metering.

[0011] However, recycled plastic scrap raw materials exhibit characteristics such as non-uniformity in specific gravity and particle size, the inclusion of foreign substances like paper and metals, and non-dispersibility, which prevent uniform mixing and result in severe variation in physical properties. Consequently, this significantly increases the defect rate during the supply process and creates difficulties in implementing special functions required for the final product, such as flame retardancy, heat resistance, antibacterial properties, conductivity, and non-toxicity, ultimately leading to a deterioration in the quality of the final product.

[0012] In particular, the non-uniformity and foreign matter content of such recycled plastic scrap raw materials hinder smooth transport by the conveying device of the supply system and make precise weighing virtually impossible; therefore, conventionally, the system is configured so that an operator weighs each scrap raw material using a scale to produce the desired volume, and then mixes them in large quantities using a ribbon mixer.

[0013] Therefore, due to inefficient weighing methods between raw materials, the time required for the blending process increases, the defect rate rises, and severe weighing errors occur, and it is difficult to establish an automated supply system, which currently hinders mass production. means of solving the problem

[0014] Accordingly, the present invention was developed to solve the problems of the prior art as described above, and

[0015] A scrap storage unit (110) for individually storing multiple types of recycled plastic scrap raw materials with different physical properties, and

[0016] A plurality of scrap transfer lines (120a~120f) that are mounted on one side of a scrap storage unit (110) and connected in a 1:1 ratio with individual scrap raw material weighing hoppers (130a~130f) assigned to each raw material to transfer scrap raw materials, and

[0017] A plurality of scrap raw material weighing hoppers (130a~130f) that are connected 1:1 to the scrap transfer lines (120a~120f) to receive each scrap raw material and weigh and discharge it in a fixed quantity according to a preset recipe, and

[0018] A conveyor module (141) is continuously installed at the bottom of a plurality of scrap raw material weighing hoppers (130a~130f) and a weighing raw material packaging module (140) that packages the weighed raw materials into a single package, and

[0019] It includes a digital control module (150) that individually controls the overall operation of the scrap storage unit or the weighing raw material packaging module (110~140) in a digital manner, and

[0020] The individual scrap transfer lines (120a~120f) are equipped with blower modules (121) and are configured to transfer scrap raw materials by blowing air by individually controlling the wind speed and air volume for each type of scrap using the digital control module (150).

[0021] In each of the above plurality of scrap raw material weighing hoppers (130a~130f),

[0022] A first blocking module (131) mounted on the upper part connected to the scrap transfer line (120a~120f) to separately capture metallic foreign matter contained in the scrap raw material by magnetic force, and

[0023] A second blocking module (132) mounted on one side of the first blocking module (131) to separately collect foreign dust contained in the scrap raw material, and

[0024] It includes a quantitative load cell (133) that is mounted by evenly arranging a plurality of them along the outer surface of the scrap raw material weighing hopper (130a~130f) and generates data in a quantitative weighing manner when the scrap raw material is transported or discharged and transmits it to the digital control module (150).

[0025] The above digital control module (150) is,

[0026] A weighing setting unit (151) for which an operator sets a weighing recipe for scrap raw materials assigned to individual scrap raw material weighing hoppers (130a~130f), and

[0027] By including a weighing operation control unit (152) that controls the quantitative weighing of scrap raw materials transferred or discharged to or from individual scrap raw material weighing hoppers (130a~130f) in real time automatically according to a preset recipe in conjunction with a quantitative load cell (133), it is possible to achieve the objective of improving quality and productivity by providing a digital-based raw material quantitative weighing system. Effects of the invention

[0028] The present invention provides a digital-based raw material quantitative metering system for use in the manufacturing process of recycled polymer composite materials, the demand of which is increasing due to eco-friendly industrialization, such as in various electronic products and electric vehicles.

[0029] In particular, the present invention has the advantage of enabling the production of high-quality recycled polymer composite materials by eliminating a series of processes for forming pellets from recycled plastic scrap raw materials by melting and extrusion, and by incorporating an effective series of conveying, quantitative weighing, and packaging configurations that allow each recycled plastic scrap raw material obtained from the cutting and crushing processes to be used directly, thereby differentiating it from conventional supply systems optimized for handling new raw materials.

[0030] Therefore, the present invention resolves various problems that occurred when applying recycled plastic scrap raw materials, which have non-uniformity, contain foreign substances such as metals, and lack dispersibility, to existing systems. By configuring a quantitative weighing system based on a digital process method optimized for recycled plastic scrap raw materials, it improves the uniformity of physical properties, reduces the defect rate, and enhances workability, productivity, and efficiency. Brief explanation of the drawing

[0031] FIG. 1 is a schematic front view of a quantitative weighing system for recycled plastic raw materials according to the present invention. FIG. 2 is a plan view of a quantitative weighing system for recycled plastic raw materials according to the present invention. FIG. 3 is a side view of a quantitative weighing system for recycled plastic raw materials according to the present invention. Specific details for implementing the invention

[0032] Hereinafter, the configuration and operation according to a preferred embodiment of the quantitative weighing system for recycled plastic raw materials of the present invention will be described in detail with reference to the attached drawings. In the following description, specific descriptions of parts that can be easily implemented by a person skilled in the art may be omitted.

[0033] FIG. 1 is a schematic front view of a quantitative weighing system for recycled plastic raw materials according to the present invention, FIG. 2 is a plan view of a quantitative weighing system for recycled plastic raw materials according to the present invention, and FIG. 3 is a side view of a quantitative weighing system for recycled plastic raw materials according to the present invention.

[0034] It should be noted that the recycled plastic raw material quantitative weighing system to which the technology of the present invention is applied relates to a technology implemented to improve quality and productivity by configuring a digital-based raw material quantitative weighing system applied to the manufacturing process of recycled polymer composite materials, for which demand is increasing due to eco-friendly industrialization such as various electronic products and electric vehicles.

[0035] Recycled plastic scrap raw materials are collected from products utilizing various renewable plastic materials. In conventional technology, various types of collected recycled plastic scrap raw materials are melted, extruded, and cut into pellet form for use in the manufacturing process of composite materials. However, due to non-uniformity and the inclusion of foreign substances, it is difficult to apply them to supply systems optimized for new raw materials, leading to problems such as reduced physical properties and high defect rates.

[0036] The quantitative weighing system for recycled plastic raw materials according to the present invention is configured to allow various types of recycled plastic scrap raw materials to be directly used in the manufacturing process of composite materials by quantitative weighing in a crushed state, and comprises a scrap storage unit (110), a plurality of scrap transfer lines (120a~120f), a plurality of scrap raw material weighing hoppers (130a~130f), a weighing raw material packaging module (140), and a digital control module (150).

[0037] The scrap storage unit (110) stores multiple types of recycled plastic scrap raw materials with different physical properties individually. The scrap storage unit (110) is configured to store each scrap raw material individually by providing a large-capacity storage tank of thousands of kilometers, as in the embodiment of the present invention, or to be used by directly connecting a scrap raw material transport tank truck.

[0038] One side of the scrap storage unit (110) is provided with a plurality of connecting modules (111) corresponding to each of the scrap transfer lines (120a~120f) to be described later, configured to connect the discharge section of a large-capacity storage tank or tank car with the individual scrap transfer lines (120a~120f) to be described later.

[0039] The scrap transfer lines (120a~120f) are mounted on one side of the scrap storage unit (110) and are provided in multiple units to be connected 1:1 with individual scrap raw material weighing hoppers (130a~130f) assigned to each raw material, so as to transfer each scrap raw material.

[0040] The scrap transfer lines (120a to 120f) form a flow path for transferring each scrap raw material from the scrap storage unit (110) to the scrap raw material weighing hoppers (130a to 130f). The front end of each individual scrap transfer line (120a to 120f) is detachably connected to the connecting module (111) of the scrap storage unit (110), and the rear end is connected to the upper part of the scrap raw material weighing hoppers (130a to 130f), which will be described later.

[0041] Each individual scrap transfer line (120a~120f) is equipped with a blower module (121), and the wind speed and air volume are individually controlled according to the type of scrap by a digital control module (150) to be described later, and the scrap raw material is transferred to a scrap raw material weighing hopper (130a~130f) connected in a 1:1 manner by a blower method. Since the scrap raw material transferred by the individual scrap transfer lines (120a~120f) differs in type and physical properties, the operation of each blower module (121) is controlled according to a recipe set by the digital control module (150) to automatically control the amount transferred to the scrap raw material weighing hopper (130a~130f).

[0042] The blower module (121) is configured to resolve the problem of frequent jamming inside the pipe and very slow transport speed when transporting scrap raw materials using a conventional screw by applying, for example, a ring blower and transporting by blowing air according to the type of scrap raw material.

[0043] A plurality of scrap raw material weighing hoppers (130a~130f) are provided to be connected 1:1 with the scrap transfer lines (120a~120f) to receive each scrap raw material and to weigh the material according to a preset recipe by the digital control module (150) to be described later, and to discharge it to the weighing raw material packaging module to be described later.

[0044] The scrap raw material weighing hoppers (130a~130f) are configured such that multiple scrap transfer lines (120a~120f) are connected to the upper inlet by arranging condensers in a row or in parallel, and a weighing raw material packaging module (140), which will be described later, is located below the lower discharge port. The scrap raw material weighing hoppers (130a~130f) are configured to quantitatively weigh and discharge the input scrap raw material in conjunction with a digital control module (150), which will be described later.

[0045] Each of the multiple scrap raw material metering hoppers (130a to 130f) is equipped with a first blocking module (131), a second blocking module (132), and a metering load cell (133).

[0046] The first blocking module (131) is mounted on the upper part connected to the scrap transfer line (120a~120f) to separately collect metallic foreign matter contained in the scrap raw material using magnetic force. The first blocking module (131) is mounted so as to be detachably attached to the inlet of the scrap raw material weighing hopper (130a~130f), and is configured to separately collect metallic foreign matter by adsorbing it with a magnetic material and to remove the metallic foreign matter through periodic replacement.

[0047] The second blocking module (132) is mounted on one side of the first blocking module (131) to separately collect foreign dust contained in the scrap raw material. The second blocking module (132) is configured to minimize the deterioration of physical properties by connecting a predetermined dust collection line and a dust collection drive unit to one side of the inlet of the scrap raw material metering hopper, thereby collecting low-density dust foreign matter contained in the scrap raw material fed into the scrap raw material metering hopper from the scrap transfer line (120a~120f) at high pressure and separately collecting it.

[0048] A plurality of quantitative load cells (133) are evenly distributed along the outer surface of the scrap raw material weighing hoppers (130a to 130f) to generate data in a quantitative weighing manner when the scrap raw material is transported or discharged, and to transmit this data to the digital control module (150). The quantitative load cells (133) are configured to measure the weight of the scrap raw material fed into the scrap raw material weighing hoppers (130a to 130f) in real time and transmit it to the digital control module (150) so that it is discharged at a weight according to a preset weighing recipe.

[0049] The weighing raw material packaging module (140) is configured to continuously install conveyor modules (141) at the bottom of a plurality of scrap raw material weighing hoppers (130a~130f) and to package the weighed raw materials into a single package.

[0050] The metering raw material packaging module (140) is configured such that a conveyor module (141) is placed on the discharge side of the scrap raw material metering hopper (130a~130f) provided by the condenser, and various types of scrap raw materials that have been metered are mixed and packaged into a single package, thereby being supplied to the manufacturing process of a recycled polymer composite material compound.

[0051] The digital control module (150) is configured to individually control the overall operation of the scrap storage unit or the weighing raw material packaging module (110 to 140) in a digital manner and includes a weighing setting unit (151) and a weighing operation control unit (152).

[0052] The weighing setting unit (151) is provided to allow an operator to set the weighing recipe for the scrap raw material assigned to the individual scrap raw material weighing hoppers (130a~130f). The weighing setting unit (151) is configured to include an input / output module that not only provides a weighing recipe data input function linked to the scrap raw material weighing hoppers (130a~130f), but also sets setting values ​​such as wind speed, air volume, and speed by linking with the scrap storage unit (110), scrap transfer line (120a~120f), and weighing raw material packaging module (140), or displays the operating status through a display.

[0053] The metering operation control unit (152) is configured to control the quantitative metering of scrap raw materials transferred to individual scrap raw material metering hoppers (130a~130f) in real time automatically according to a preset recipe in conjunction with the quantitative load cell (133). The metering operation control unit (152) is configured to automatically perform quantitative metering by controlling the discharge amount of scrap raw materials to each scrap raw material metering hopper (130a~130f) by analyzing and comparing the data transmitted from the quantitative load cell (133) installed in the individual scrap raw material metering hoppers (130a~130f) with the preset recipe in real time, and simultaneously discharge the quantitatively metered raw materials and proceed with continuous transfer from the scrap storage unit (110).

[0054] The general operational state of the quantitative weighing system for recycled plastic raw materials to which the technology of the present invention is applied, configured as described above, is as follows. Since the following description explains preferred embodiments of the present invention, the present invention is not limited by the following embodiments, and it is obvious that various modifications may be provided within the scope of the present invention.

[0055] The quantitative weighing system for recycled plastic raw materials according to the present invention is configured as a digital process-based system that quantitatively weighs recycled polymer scrap raw materials in a cut and crushed state so that they can be directly used in the manufacturing process of composite materials, and is configured as a system optimized for the quantitative weighing and supply of recycled polymer scrap raw materials, which have non-uniform physical properties and irregular specific gravity and particle size compared to new raw materials.

[0056] Various types of recycled polymer scrap raw materials are stored individually in a large-capacity tank of a scrap storage unit (110) in a crushed state, or are used by directly connecting a scrap raw material transport tank truck.

[0057] The operator sets a weighing recipe for manufacturing the final target recycled polymer composite compound using the weighing setting unit (151) of the digital control module (150). The weighing operation control unit (152) controls the blower module (121) of the individual scrap transfer line (120a~120f), which is connected 1:1 with each scrap raw material weighing hopper (130a~130f) to which individual scrap raw materials are assigned, to carry out the transfer.

[0058] Scrap raw materials fed into the inlets of each scrap raw material weighing hopper (130a~130f) through multiple scrap transfer lines (120a~120f) are fed into the interior after separating metallic foreign matter by the first blocking module (131) and removing dusty foreign matter by the second blocking module (132).

[0059] A quantitative load cell (133) mounted on the outer side of each individual scrap raw material weighing hopper (130a~130f) generates data for each scrap raw material being fed in real time and transmits it to a digital control module (150). When the quantitative weighing of the corresponding scrap raw material is performed according to a recipe pre-set in the weighing setting unit (151), the weighing operation control unit (152) stops the feeding via the corresponding scrap transfer line (120a~120f) and discharges the scrap raw material to the conveyor module (141) of the weighing raw material packaging module (140) through the discharge port.

[0060] The quantitatively measured scrap raw materials discharged from the conveyor module (141) are mixed in the weighed raw material packaging module (140), packaged into a single package, and then supplied to the manufacturing process of a recycled polymer composite material compound.

[0061] As soon as the discharge of all scrap raw materials from the multiple scrap raw material weighing hoppers (130a~130f) is completed, the input via the multiple scrap transfer lines (120a~120f) is automatically resumed and the operation is repeated.

[0062] The quantitative metering system for recycled plastic raw materials according to the present invention, as described above, has the advantage of enabling the production of high-quality recycled polymer composite materials by incorporating effective conveying, quantitative metering, and packaging configurations that allow each recycled plastic scrap raw material obtained from the cutting and crushing process to be used directly.

[0063] Therefore, the present invention resolves various problems that occurred when applying recycled plastic scrap raw materials, which have non-uniformity, contain foreign substances such as metals, and lack dispersibility, to existing systems. By configuring a quantitative weighing system based on a digital process method optimized for recycled plastic scrap raw materials, it improves the uniformity of physical properties, reduces the defect rate, and enhances workability, productivity, and efficiency. Explanation of the symbols

[0064] 110: Scrap storage unit 111: Connecting Module 120a~120f: Scrap transfer line 121: Blower module 130a~130f: Scrap material weighing hopper 131: First blocking module 132: Second blocking module 133: Quantitative load cell 140: Weighing and Raw Material Packaging Module 141: Conveyor Module 150: Digital control module 151: Metering setting section 152: Metering Operation Control Unit

Claims

Claim 1 A scrap storage unit (110) for individually storing multiple types of recycled plastic scrap raw materials with different physical properties; a plurality of scrap transfer lines (120a~120f) mounted on one side of the scrap storage unit (110) and connected 1:1 with individual scrap raw material weighing hoppers (130a~130f) assigned to each raw material to transport the scrap raw materials; a plurality of scrap raw material weighing hoppers (130a~130f) connected 1:1 with the scrap transfer lines (120a~120f) to receive each scrap raw material, weigh it quantitatively according to a preset recipe, and discharge it; a weighing raw material packaging module (140) for continuously installing a conveyor module (141) at the bottom of the plurality of scrap raw material weighing hoppers (130a~130f) and packaging the quantitatively weighed raw materials into a single package; and a scrap storage unit or It includes a digital control module (150) that individually controls the operation of the weighing raw material packaging modules (110~140) in a digital manner, and the individual scrap transfer lines (120a~120f) are equipped with a blower module (121) and are configured to transfer the scrap raw material by blowing air by individually controlling the wind speed and air volume according to the difference in specific gravity of each type of scrap raw material by the digital control module (150), and each of the plurality of scrap raw material weighing hoppers (130a~130f) is equipped with a first blocking module (131) that is mounted on the upper part connected to the scrap transfer lines (120a~120f) to separately collect metallic foreign matter contained in the scrap raw material by magnetic force, and a dust collection line that is mounted on one side of the first blocking module (131) to suck in and separately collect foreign dust contained in the scrap raw material through a dust collection line connected to a separate dust collection drive unit. It includes a second blocking module (132) and a plurality of quantitative load cells (133) that are evenly arranged and mounted along the outer surface of the scrap raw material weighing hoppers (130a~130f), and generate data in a quantitative weighing manner when the scrap raw material is transported or discharged and transmit it to the digital control module (150); the digital control module (150) includes a weighing setting unit (151) in which an operator sets a weighing recipe for the scrap raw material assigned to the individual scrap raw material weighing hoppers (130a~130f), andA recycled plastic raw material quantitative weighing system characterized by including a weighing operation control unit (152) that controls the quantitative weighing in real time according to a preset recipe for each individual scrap raw material weighing hopper (130a~130f) in conjunction with a quantitative load cell (133) of each individual scrap raw material weighing hopper (130a~130f), and automatically controls the discharge amount of scrap raw material to the scrap raw material weighing hopper (130a~130f) and simultaneously controls continuous transfer from the scrap storage unit (110) by analyzing the data transmitted from the quantitative load cell (133) and the preset recipe in real time. Claim 2 delete

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