KR20230081821A - Recycled polymer scrap quantitative supply system - Google Patents

Abstract

The present invention relates to a system for quantitative supply of recycled polymer scrap, comprising scrap raw material service hoppers (110a to 110f) and scrap raw material service hoppers (110a to 110f) equipped with a condenser to store a plurality of types of recycled polymer scrap raw materials having different physical properties, respectively. ) The raw material metering hopper 120 that receives scrap raw materials and discharges them through the lower discharge port, the lower discharge port 111 of the scrap raw material service hoppers 110a to 110f and the upper input port 121 of the raw material metering hopper 120 ) Forming individual scrap transfer lines 131a to 131f between the scrap transfer module 130 for transporting various types of scrap materials, and measuring the level of scrap materials in real time by installing them in the scrap material service hoppers 110a to 110f The measurement module 140, the scrap material service hoppers 110a to 110f, or the state control module 150 for digitally controlling the operation of the state measurement module 140 are included, and the scrap transfer module 130 forms a cylindrical cross section. Scrap transfer lines 131a to 131f made of stainless steel, mounted inside the scrap transfer lines 131a to 131f and rotated in one direction by a driving means 133 to transfer scrap raw materials Spring screw 132, Based on the digital smart process, including scrap avoidance units 134a and 134b that form a space along one side of the spring screw 132 inside the scrap transfer lines 131a to 131f and separately collect and separate scrap with a large particle size. It is characterized by being able to quantitatively measure and supply recycled polymer scrap materials.

Description

Recycled polymer scrap quantitative supply system {RECYCLED POLYMER SCRAP QUANTITATIVE SUPPLY SYSTEM}

The present invention relates to a system for quantitative supply of recycled polymer scrap, and more particularly, to quantitative supply of scrap based on a digital smart process applied to the manufacturing process of recycled polymer composite materials, the demand of which is rapidly increasing due to the eco-friendly industrialization of various electrical and electronic products. It relates to a technology that configures a system and implements it to improve productivity and quality.

In general, the demand for a polymer composite material compound, which is a raw material that accounts for a large portion in the manufacture of electrical and electronic products, is continuously increasing.

In particular, developed countries such as Europe, which have recently been actively promoting eco-friendly policies in the electronics-related industry, suggest the use of recycled raw materials as a compulsory recommendation to improve resource efficiency. Development is actively progressing.

The process of manufacturing a recycled polymer composite material compound used in the manufacture of final products from discarded polymer scrap raw materials consists of four major steps.

First, in the first stage, scrap materials are collected from various sources, foreign substances are separated, and then washed. In the second step, scrap raw materials are cut and pulverized into a certain size. In the third step, the pulverized raw material is melted and extruded together with various additives and processed into recycled pellets or chips. In step 4, a polymer composite material compound is manufactured using pellets and supplied to the final product manufacturer.

As an example of a conventionally known technology related to recycling polymer manufacturing technology, Korean Patent Registration No. 10 - 0566065 discloses a collection step of collecting composite PP, PE compound, ABS, PVC, engineering plastic, and thermoplastic resin, and the collected waste plastic A sorting step of classifying based on type and color, a crushing step of crushing waste plastics into 1 mm to 15 mm after measuring hazardous substances in the classified waste plastics, and washing the waste plastics with detergents such as sodium phosphate and polysodium phosphate in water and water. After mixing together and washing, a drying step in which the washed waste plastic is put into a bag and dried together with phosphorus pentoxide white powder, a first extrusion step in which the washed waste plastic is decolored and environmentally harmful substances are removed, and the decolorized waste through the first extrusion step Recycling plastic pellets using waste plastics, including the secondary extrusion step of coloring plastics in various colors and reinforcing physical properties, the product production step of producing products using waste plastics that have undergone physical property tests, and the product packaging step. It constitutes the manufacturing method of

As another example, Korean Patent Publication No. 10 - 2011 - 0027860 discloses a first step of extruding through a first die after crushing the waste plastic, washing it with water, drying it, and then melting it first, and extruding the extruded material in the first step. The second step of extruding thinner than the first extrudate through a second die after the secondary melting of water, and the third step of cooling and cutting the extrudate extruded in the second step to make recycled waste plastic material in the form of pellets. It constitutes a waste plastic recycling material production method comprising a.

As another example, Korean Patent Registration No. 10 - 1548048 discloses engineering plastics made of any one of polyamide, polyester and polystyrene, urethane-based, ester-based or amide-based thermoplastic elastomers, synthetic resin debris, synthetic fiber debris, synthetic A mixture comprising a component composed of mutually mixing any one or two or more of recycled plastics obtained through a solid synthetic high molecular compound extracted from waste plastic containing rubber crumbs, an impact modifier, a compatibilizer, a lubricant, and an antioxidant. It constitutes a method for producing a synthetic resin composition comprising a mixing step of forming, a heating and extraction step of heating the mixture and extracting it with an extruder, a pellet step of forming the extracted extract into pellets, and a drying step of drying the pellets. .

Korean Registered Patent No. 10 - 0566065 (2006.03.30) Korean Patent Publication No. 10 - 2011 - 0027860 (2011.03.17) Korean Registered Patent No. 10 - 1548048 (2015.08.28) Korean Patent Publication No. 10 - 2014 - 0020392 (2014.02.19)

In the supply system applied to the prior art recycling polymer composite material manufacturing process as described above, polymer scrap raw materials are collected and washed, then cut and pulverized, melted and extruded, processed into pellets or chips, and then supplied to form a composite material compound. is made to manufacture

Since such a prior art supply system is made to supply using pellets primarily produced by melting and extrusion as a basic raw material, the specific gravity and particle size between the pellets are constant, which has the advantage of high profitability.

However, raw materials made of primarily manufactured pellets generally have inferior conditions such as foreign substances, other resins, various compounds, carbides, and thermal history, so that the physical properties are severely deteriorated and in most cases there is no effect on physical property reinforcement through additives. However, there is a problem in that it is difficult to actively respond in the event of a defect because the final manufacturer cannot confirm the type of original scrap and whether or not other synthetic resins are introduced due to the lack of information on the primarily manufactured pellets.

In order to solve this problem, instead of using primarily manufactured pellets as in the prior art, technology to improve the supply system so that recycled polymer scrap obtained in the cutting and grinding process can be used directly in the manufacturing process of composite materials. this may apply.

However, since recycled polymer scrap has a characteristic of severe dispersion of physical properties during mixing due to non-uniformity such as specific gravity and particle size, a problem of significantly increasing the defect rate occurs in the supply process.

In particular, since the non-uniformity of such recycled polymer scrap makes it difficult to smoothly transport by the conveying device of the supply system, automatic supply is virtually impossible, and there is a problem in that a severe measurement error occurs.

In addition, most of the process systems and technical standards used in the recycled polymer composite material compound industry use existing systems optimized for handling new raw materials, so they are not suitable for mass production of recycled polymer raw materials.

For example, in the conventional system, the time required for the entire blending process is long due to an inefficient metering method between base materials through mass blending, so that the output of the extruder cannot be followed or the blending process is delayed. This hinders the establishment of a digital smart process-based centralized control system, making it difficult to improve productivity and efficiency.

Accordingly, the present invention was invented to solve the problems of the prior art as described above,

In the recycled polymer scrap quantitative supply system provided to receive and mix various types of recycled polymer scrap raw materials and supply them to the recycled polymer composite material compound manufacturing process,

Scrap raw material service hoppers 110a to 110f provided with a condenser to store a plurality of recycled polymer scrap raw materials having different physical properties, respectively;

A raw material metering hopper 120 provided to receive recycled polymer scrap raw materials from the scrap raw material service hoppers 110a to 110f and quantitatively measure and discharge them through a lower discharge port;

It is provided to form individual scrap transfer lines 131a to 131f between the lower outlet 111 of the scrap raw material service hoppers 110a to 110f and the upper inlet 121 of the raw material metering hopper 120, and various types of recycled polymers A scrap transfer module 130 provided to transfer scrap raw materials;

A state measurement module 140 installed in the scrap raw material service hoppers 110a to 110f to measure the level of recycled polymer scrap raw materials in real time;

It includes a state control module 150 provided to digitally control the operation of the scrap raw material service hoppers 110a to 110f or the state measurement module 140,

The scrap transfer module 130,

Scrap transfer lines 131a to 131f formed and provided with a stainless material forming a cylindrical cross section,

A spring screw 132 mounted inside the scrap transfer lines 131a to 131f and rotated in one direction by a driving means 133 to transfer recycled polymer scrap;

A scrap avoidance unit (134a) provided to form a space along one side of the spring screw 132 inside the scrap transfer lines (131a to 131f) and separately collect and separate large-sized scraps to implement continuous transfer of recycled polymer scraps. , 134b), it is possible to achieve the purpose of quantifying and supplying recycled polymer scrap raw materials based on a digital smart process.

The present invention provides a scrap quantity supply system based on a digital smart process applied to the manufacturing process of recycled polymer composite materials, the demand of which is rapidly increasing due to the eco-friendly industrialization of various electrical and electronic products.

In particular, the present invention is differentiated from a conventional supply system optimized for handling new raw materials, excluding a series of processes of forming polymer scrap raw materials into pellets by melting and extruding, and manufacturing process of composite materials in a state of cutting and grinding. There is an advantage in solving the problems of high defect rate and low process efficiency of the conventional system by constructing a system that supplies so that it can be used directly.

In addition, the present invention configures a supply system capable of automatic transfer, mass supply, and quantitative measurement of raw materials to improve various problems due to the non-uniformity characteristics of recycled polymer scrap, thereby overcoming problems of productivity and defect rate and providing an automated system based on a digital smart process. By constructing it, there is an effect that centralized control can be achieved.

Therefore, the present invention has the advantage of improving the export competitiveness of recycled polymer composite materials, which are rapidly increasing in demand in next-generation eco-friendly industries such as electronic products, through cost reduction and high added value of recycled polymer raw materials.

1 is a schematic front view of a recycled polymer scrap quantitative supply system according to the present invention.
Figure 2 is a plan view of a recycled polymer scrap quantitative supply system according to the present invention.
Figure 3 is a schematic plan view and front view of the raw material metering hopper of the recycled polymer scrap quantitative supply system according to the present invention.
Figure 4 is a schematic perspective view and internal view of the scrap moving module of the recycled polymer scrap quantitative supply system according to the present invention.
Figure 5 is a cross-sectional view of first and second types of scrap avoidance of the recycled polymer scrap quantitative supply system according to the present invention.
6 is a schematic configuration diagram of a supply system according to the prior art;
7 is an exemplary view of a state of use of a supply system according to the prior art;

Hereinafter, the configuration and operation according to a preferred embodiment of the recycled polymer scrap quantitative supply system of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of parts that can be easily implemented by those skilled in the art may be omitted.

1 is a schematic front view of a quantitative supply system for recycled polymer scraps according to the present invention, FIG. 2 is a plan view of a quantitative supply system for recycled polymer scraps according to the present invention, and FIG. 3 is a raw material of the quantitative supply system for recycled polymer scraps according to the present invention. A schematic plan view and front view of a metering hopper, Figure 4 is a schematic perspective view and internal view of the scrap transfer module of the quantitative supply system for recycled polymer scraps according to the present invention, Figure 5 is a first part of the quantitative supply system for recycled polymer scraps according to the present invention A cross-sectional view of type 1 and 2 scrap avoiders, FIG. 6 is a schematic configuration diagram of a supply system according to the prior art, and FIG. 7 shows an exemplary use state of the supply system according to the prior art.

The recycled polymer scrap quantitative supply system to which the technology of the present invention is applied constitutes a digital smart process-based scrap quantitative supply system applied to the manufacturing process of recycled polymer composite materials, whose demand is rapidly increasing due to the eco-friendly industrialization of various electrical and electronic products. Note that it is about a system implemented to improve productivity and quality.

For this purpose, the recycled polymer scrap quantitative supply system of the present invention constitutes a recycled polymer scrap quantitative supply system provided to receive and mix various types of recycled polymer scrap raw materials and supply them to the recycled polymer composite material compound manufacturing process, specifically as follows. .

Recycled polymer scrap raw materials are collected from a variety of sources from a variety of renewable polymer products. In the prior art, strands are melted and extruded from the collected recycled polymer scrap raw materials through an extrusion line, cut by a pelletizer, and supplied in the form of pellets, but there is a problem of deterioration in physical properties and a high defect rate, and melting and extrusion Even if a series of processes for forming into pellets are excluded, there is a limit in that various problems due to non-uniformity of recycled polymer scrap materials cannot be overcome with the existing configuration of a supply system optimized for new raw materials.

The present invention constitutes a digital smart process-based system that quantitatively measures and supplies recycled polymer scrap raw materials so that they can be directly used in the manufacturing process of composite materials in a state where they are cut and pulverized. It includes a raw material measuring hopper 120, a scrap transfer module 130, a condition measurement module 140, and a condition control module 150.

The scrap raw material service hoppers 110a to 110f are provided with a condenser to store each of a plurality of types of recycled polymer scrap raw materials having different physical properties.

The scrap raw material service hoppers 110a to 110f form a vertical tower-type body and have an upper inlet and a lower portion with an upper and lower narrow outlet 111, and the lower side thereof is provided with a scrap transfer module 130 to be described later. Combine lines 131a to 131f.

The scrap raw material service hoppers 110a to 110f are provided with a large capacity of about 2000 Kg to store recycled polymer scrap raw materials, and in the embodiment of the present invention, a total of six scrap raw material service hoppers 110a to 110f are arranged to measure the recipe. It is configured to store various kinds of raw materials according to.

The raw material metering hopper 120 is provided to receive recycled polymer scrap raw materials from the scrap raw material service hoppers 110a to 110f and quantitatively measure and discharge them through a lower discharge port.

The raw material metering hopper 120 combines a plurality of scrap transfer lines 131a to 131f connected from the individual scrap raw material service hoppers 110a to 110f to the upper inlet 121, and the lower part is provided with a discharge port in the shape of an upper shaft and a lower shaft. do.

The raw material metering hopper 120 is equipped with a capacity of about 1000 Kg, receives each recycled polymer scrap material sequentially from the scrap raw material service hoppers 110a to 110f of the condenser according to the metering recipe, and quantitatively measures the recycled polymer composite. It is configured to be supplied to the material compound manufacturing process.

The raw material weighing hopper 120 is provided with first to fourth cylindrical load cells 122 to 125 equally disposed at four locations along the outer surface.

The supply system according to the prior art is configured so that a worker weighs raw materials with a scale to create a desired capacity and then mixes them with a ribbon mixer. It is possible to supply, but in the case of recycled polymer scrap raw materials with non-uniform physical properties and irregular specific gravity and particle size, problems such as reduced final production and increased process defect rate occur.

The first to fourth cylindrical load cells 122 to 125 according to the present invention are mounted on four outer locations of the raw material weighing hopper 120, and generated during the transfer of recycled polymer scrap materials to the raw material weighing hopper 120. It is a combination of the pressing force and the platform type quantitative method, and the first to fourth cylindrical load cells 122 to 125 act as a weighing plate of the platform to quantify the actual weight.

That is, in the first to fourth cylindrical load cells 122 to 125, various kinds of recycled polymer scrap materials are transferred from the scrap raw material service hoppers 110a to 110f of the condenser by the scrap transfer module 130 to the raw material weighing hopper 120 ), it is configured to generate weighing data in an accumulative weighing method and transmit it to the state control module 150 during sequential transfer.

The scrap transfer module 130 operates individual scrap transfer lines 131a to 131f between the lower discharge ports 111 of the scrap raw material service hoppers 110a to 110f and the upper input port 121 of the raw material weighing hopper 120. It is provided to form and is provided to transfer various kinds of recycled polymer scrap materials.

The scrap transfer module 130 transfers recycled polymer scrap materials between the individual scrap material service hoppers 110a to 110f and the material weighing hopper 120 while the operation is controlled by the condition control module 150 to be described later. It is configured, and includes scrap transfer lines 131a to 131f, a spring screw 132, and scrap avoidance parts 134a and 134b.

The scrap transfer lines 131a to 131f are formed of a stainless material forming a cylindrical cross section.

The scrap transfer lines 131a to 131f combine inlets with lower outlets 111 of individual scrap raw material service hoppers 110a to 110f and have outlets at the upper inlets 121 of the raw material metering hopper 120 for recycling. It forms a conveying path for polymer scrap raw materials.

Line opening/closing parts 135 are provided on the inlets and outlets of the individual scrap transfer lines 131a to 131f to enable water washing of internal contamination sources.

The line opening/closing unit 135, for example, when the type of recycled polymer scrap raw material is changed according to a change in the metering recipe, the scrap transfer lines 131a to 131f may contain residues of the previous raw material, so that the corresponding scrap transfer line 131a ~ 131f) by operating the line opening/closing part 135 to clean the inside of the scrap transfer lines 131a to 131f made of stainless steel and the following spring screw 132.

The spring screw 132 is mounted inside the individual scrap transfer lines 131a to 131f and is rotated in one direction by a driving means 133 to transfer recycled polymer scrap.

In the supply system according to the prior art, it is common to use a ring blower when transferring raw materials, but there are problems such as clogging inside the pipe or scattering of raw materials. (132) is mounted so that the recycled polymer scrap materials are transported.

The spring screw 132 is coupled with a driving means 133 provided on one side of the scrap transfer lines 131a to 131f to rotate in one direction.

Arranged in the longitudinal direction inside the individual scrap transfer lines 131a to 131f and support one side of the spring screw 132 so that the scrap transfer lines 131a to 131f and the spring screw 132 are positioned on a coaxial line. It includes a spring support 136 to.

The scrap transfer lines 131a to 131f of the present invention are provided with a length of several meters according to the field situation in which the 2000Kg class scrap raw material service hoppers 110a to 110f are provided with a condenser, the sagging phenomenon of the spring screw 132 Since this may be unavoidable, the spring support part 136 maintains the operating position of the spring screw 132 at the center of the scrap raw material service hoppers 110a to 110f to maintain a smooth transfer state.

The scrap avoidance parts 134a and 134b form a space along one side of the spring screw 132 inside the individual scrap transfer lines 131a to 131f, and scrap with a large particle size is separately collected and separated to obtain recycled polymer scrap. Equipped to implement continuous transfer.

The scrap avoidance skins 134a and 134b are caught between the spring screw 132 and the scrap transfer lines 131a to 131f, for example, as in the prior art shown in FIG. 7 due to the irregular shape of recycled polymer scrap raw materials. It is provided to prevent the phenomenon from occurring, causing damage to the spring screw 132 or the driving means 133 and causing problems such as congestion.

The scrap avoiding parts 134a and 134b are provided in a first type and a second type and are configured to be selectively applied to the scrap transfer lines 131a to 131f.

The first type scrap avoidance unit 134a is a space forming a '┌┐' shaped cross section from the center of one side of the inner circumferential surface of the scrap transfer lines 131a to 131f to the outside along the longitudinal direction of the scrap transfer lines 131a to 131f. Protrude and prepare

The first type scrap avoiding part 134a forms a space protruding along the central line of one side of the inner circumferential surface of the scrap transfer lines 131a to 131f forming a cylindrical cross section, and by the rotation of the spring screw 132, the scrap transfer line ( 131a to 131f), among recycled polymer scrap materials that are transported while rotating, are configured to receive and separate raw materials having a large particle size that hinder transfer to the first type scrap avoidance skin 134a by centrifugal force.

The first type scrap avoidance part 134a is preferably formed on the upper side of the scrap transfer lines 131a to 131f to prevent the recycling polymer scrap material from being stacked on the inside due to gravity.

The second type scrap avoidance unit 134b is a space forming a cross section of '┌' or '┐' shape from one side and the other side of the inner circumferential surface of the scrap transfer lines 131a to 131f, respectively, to the outside of the scrap transfer lines 131a to 131f. It protrudes along the length direction of and is provided.

The second type scrap avoiding skin 134b forms a space protruding to face each other on one side and the other side of the inner circumferential surface of the scrap transfer lines 131a to 131f forming a cylindrical cross section, so that raw materials of large particle size that hinder transfer are removed by centrifugal force. It is configured to be received and separated at two points by

The state measuring module 140 is installed in the scrap raw material service hoppers 110a to 110f to measure the level of recycled polymer scrap raw materials in real time.

The condition measurement module 140 measures the storage capacity of each recycled polymer scrap material stored in the individual scrap material service hoppers 110a to 110f in real time and transmits the measurement to the condition control module 150 to resupply the insufficient raw material. It is configured so that process continuity is achieved.

The state control module 150 is provided to digitally control the operation of the scrap raw material service hoppers 110a to 110f or the state measurement module 140 to realize a digital smart process, and the first to third processing units include

The first processing unit processes measurement data transmitted from the condition measurement module 140 and analyzes the level of recycled polymer scrap materials stored in the scrap material service hoppers 110a to 110f in real time.

The second processing unit sets a weighing recipe for recycled polymer scrap materials to be transferred to the raw material weighing hopper 120, analyzes weighing data transmitted from the raw material weighing hopper 120 in real time, and automatically controls quantitative weighing. .

The second processing unit, for example, a weighing calibration function, an external input/output function for supply amount, an automatic weighing function according to input of metering recipe data, a setting function for setting values such as supply amount, free fall, upper and lower limits, and the scrap material service hoppers 110a to 110f It is configured to implement a communication function for data transmission and reception with the state measurement module 140 and other process systems.

The third processing unit transmits and displays a notification signal in conjunction with the first processing unit and the second processing unit, or generates management data and control signals.

The third processing unit stops the transfer from the scrap raw material service hoppers 110a to 110f when the cumulative weighing is completed in the raw material weighing hopper 120 according to the metering recipe set in the second processing unit, and the raw material weighing hopper 120 ) at the same time as discharging the weighed raw material and sequentially performing secondary transfer from the scrap raw material service hoppers 110a to 110f.

A schematic usage state of the recycled polymer scrap quantitative supply system to which the technology of the present invention having the configuration described above is applied is as follows. Since the following description describes the present invention with respect to preferred embodiments, the present invention is not limited by the following examples, and it is natural that various modifications may be provided without departing from the scope of the present invention. .

The quantitative supply system for recycled polymer scrap according to the present invention constitutes a digital smart process-based system that quantitatively measures and supplies recycled polymer scrap raw materials in a state where raw materials for recycled polymer scrap are cut and pulverized so that they can be used directly in the manufacturing process of composite materials, It constitutes an optimized system for quantitative and metered supply of recycled polymer scrap raw materials whose physical properties are not uniform compared to new raw materials and whose specific gravity and particle size are irregular.

Various types of recycled polymer scrap materials are individually stored in scrap material service hoppers 110a to 110f provided with condensers, respectively. The scrap raw material service hoppers 110a to 110f have a condition measuring module 140 to measure the level of each raw material and transmit the data to the condition control module 150 to check the raw material shortage in real time.

The state control module 150 includes first to third processing units, and an operator sets a metering recipe for producing a final target recycled polymer composite material compound. Individual raw materials are sequentially supplied to the raw material weighing hopper 120 through the scrap transfer module 130 from the scrap raw material service hoppers 110a to 110f of the condenser according to the set metering recipe.

The scrap transfer module 130 includes individual scrap transfer lines 131a to 131f between the individual scrap raw material service hoppers 110a to 110f and the raw material weighing hopper 120, and is unidirectionally driven by a driving means 133 therein. The raw material is transported by operating the rotating spring screw 132.

A first type scrap avoiding skin 134a or a second type scrap avoiding skin 134b is formed inside the scrap transfer lines 131a to 131f, and the recycled polymer scrap raw materials of large particles that hinder the transfer are removed by centrifugal force. It is accommodated in the scrap avoiding parts 134a and 134b and separated. Due to the non-uniform particle size of recycled polymer scrap raw materials, especially large-particle raw materials, a phenomenon occurs between the spring screw 132 and the inner circumferential surface of the scrap transfer line (131a ~ 131f), causing congestion or interruption of transfer as well as damage to surrounding parts. Therefore, a series of problems are minimized through the scrap avoidance units 134a and 134b.

The scrap transfer module 130 sequentially transfers each raw material from the individual scrap raw material service hoppers 110a to 110f to the raw material weighing hopper 120 according to the metering recipe set by the state control module 150.

The first to fourth cylindrical load cells 122 to 125 provided on the outside of the raw material weighing hopper 120 generate real-time weighing data while the raw material is transferred.

The first to fourth cylindrical load cells 122 to 125 generate real-time weighing data in an accumulative weighing method and transmit it to the state control module 150. The state control module 150 quantitatively weighs each raw material into the raw material weighing hopper 120 according to a predetermined weighing recipe by interlocking the first processing unit to the third processing unit, and measures the state of the scrap raw material service hoppers 110a to 110f. The operation of the module 140 is digitally controlled to automatically and repeatedly perform all transfer and weighing operations.

<Test Example 1>

Transfer and metering processes were performed using the recycled polymer scrap quantitative supply system according to the present invention and a conventional supply system for new raw materials as a comparative example, and workability, productivity, and defect rate were compared. 6 is a schematic configuration diagram of a conventional system.

In the prior art, the raw materials calculated for each mixing ratio in each base raw material are fed and metered in such a way that the operator individually weighs the raw materials according to the final mixing ratio to make a final 600 kg, and then mixes them with a ribbon mixer. Therefore, in the conventional metering method, the production rate per hour is reduced due to complicated mixing steps and manual work, the number of incorrect inputs of raw materials increases, and the process defect rate increases, and it is difficult to secure skilled labor due to high work fatigue, resulting in a decrease in productivity.

In contrast, in the present invention, based on the digital smart process, automated quantitative measurement is performed by the raw material weighing hopper 120 and the state control module 150, and efficient raw material transfer is performed by the scrap transfer module 130, so that the prior art can solve all the problems of

<Test Example 2>

Actual productivity was compared using the conventional supply system for new raw materials as in the comparative example of Test Example 1 and the quantitative supply system for recycled polymer scrap according to the present invention, and the results are shown in Tables 1 and 2 below. .

comparison example System Original Mass Production Capa Actual Production Capa Production per hour (Kg) 22 hours per day, 22 days per month (Kg) Production per hour (Kg) 1 day 22 hours 22 days (Kg) Actual production rate compared to mass production CAPA (%) Unit 1 600 290,400 350 169,400 about 58% Unit 2 1,200 580,800 600 290,400 about 50% unit 3 1,200 580,800 600 290,400 about 50% Sum 3,000 1,458,000 1,550 750,200 about 51%

the present invention 1 hours 1 day (22 hours) Month (22nd) Production increase per hour (Kg) 100 2,200 48,400 Sales increase (\2,700/Kg) 270,000 5,940,000 13,080,000

The conventional supply system was mass-produced at an average of 51% lower production efficiency compared to the original mass-production capacity due to system and process limitations optimized for supplying new raw materials, and the defect rate was confirmed to be about 4.4%.

In contrast, the recycled polymer scrap quantitative supply system according to the present invention was able to increase the production rate per hour from 600 kg to 700 kg by 100 kg due to a series of system and process improvements as described above, and the defect rate of 4.4% was reduced to 1.1%. has been shown to decrease.

As described above, the quantitative supply system for recycled polymer scrap according to the present invention is differentiated from the existing supply system optimized for new raw materials, and supplies recycled polymer scrap raw materials to be directly used in the manufacturing process of composite materials in a state where they are cut and pulverized. provide the system.

In particular, the present invention overcomes the productivity and defect rate problems of the conventional system by constructing a supply system capable of automatic transfer, mass supply, and quantitative measurement of raw materials to improve various problems due to the non-uniformity characteristics of recycled polymer scrap, and a digital smart process-based It has the effect of establishing an automated system so that centralized control can be achieved.

Therefore, the present invention is expected to significantly improve the export competitiveness of recycled polymer composite materials, which are rapidly increasing in demand in next-generation eco-friendly industries such as electronic products, through cost reduction and high added value of recycled polymer raw materials.

110a ~ 110f: scrap raw material service hopper
111: outlet
120: raw material weighing hopper
121: inlet
122 to 125: first to fourth cylindrical load cells
130: scrap transfer module
131a ~ 131f: scrap transfer line
132: spring screw
133: driving means
134a: first type scrap avoidance
134b: second type scrap avoidance
135: line opening and closing part
136: spring support
140: state measurement module
150: state control module

Claims (5)

In the recycled polymer scrap quantitative supply system provided to receive and mix various types of recycled polymer scrap raw materials and supply them to the recycled polymer composite material compound manufacturing process,
Scrap raw material service hoppers 110a to 110f provided with a condenser to store a plurality of recycled polymer scrap raw materials having different physical properties, respectively;
A raw material metering hopper 120 provided to receive recycled polymer scrap raw materials from the scrap raw material service hoppers 110a to 110f and quantitatively measure and discharge them through a lower discharge port;
It is provided to form individual scrap transfer lines 131a to 131f between the lower outlet 111 of the scrap raw material service hoppers 110a to 110f and the upper inlet 121 of the raw material metering hopper 120, and various types of recycled polymers A scrap transfer module 130 provided to transfer scrap raw materials;
A condition measuring module 140 installed in the scrap raw material service hoppers 110a to 110f to measure the level of recycled polymer scrap raw materials in real time;
It includes a state control module 150 provided to digitally control the operation of the scrap raw material service hoppers 110a to 110f or the state measurement module 140,
The scrap transfer module 130,
Scrap transfer lines 131a to 131f formed and provided with a stainless material forming a cylindrical cross section,
A spring screw 132 mounted inside the scrap transfer lines 131a to 131f and rotated in one direction by a driving means 133 to transfer recycled polymer scrap materials;
A scrap avoidance unit provided to form a space along one side of the spring screw 132 inside the scrap transfer lines 131a to 131f and to separately collect and separate large-sized scrap to realize continuous transfer of recycled polymer scrap materials ( 134a, 134b) Recycled polymer scrap quantitative supply system characterized in that it comprises. According to claim 1,
The scrap transfer module 130,
A line opening/closing unit 135 installed on the inlet and outlet of the individual scrap transfer lines 131a to 131f to enable water washing of internal contamination sources;
Arranged in the longitudinal direction from the inside of the individual scrap transfer lines (131a to 131f) and supports one side of the spring screw 132 so that the scrap transfer lines (131a to 131f) and the spring screw 132 are positioned on the coaxial line Provided Recycled polymer scrap quantitative supply system, characterized in that it comprises a spring support (136). According to claim 1 or 2,
The scrap transfer module 130,
A first type scrap avoidance device provided by protruding from the center of one side of the inner circumferential surface of the scrap transfer lines (131a to 131f) to the outside to form a '┌┐'-shaped cross section along the longitudinal direction of the scrap transfer lines (131a to 131f). (134a),
Alternatively, a space forming a '┌' or '┐'-shaped cross section is provided by protruding from one side and the other side of the inner circumferential surface of the scrap transfer lines 131a to 131f along the longitudinal direction of the scrap transfer lines 131a to 131f. Recycled polymer scrap quantitative supply system, characterized in that it comprises one selected from the second type scrap avoidance unit (134b). According to claim 1,
The raw material weighing hopper 120 is provided with first to fourth cylindrical load cells 122 to 125 equally disposed at four locations along the outer surface,
The first to fourth cylindrical load cells 122 to 125,
When various kinds of recycled polymer scrap raw materials are sequentially transferred from the scrap raw material service hoppers 110a to 110f of the condenser to the raw material weighing hopper 120 by the scrap transfer module 130, the condition is controlled by generating metering data in an accumulative weighing method. Recycled polymer scrap quantitative supply system, characterized in that configured to transmit to the module (150). According to claim 1,
The state control module 150,
A first processing unit provided to analyze the level of recycled polymer scrap raw materials stored in the scrap raw material service hoppers 110a to 110f in real time by processing the measurement data transmitted from the state measurement module 140;
A second processing unit provided to set a weighing recipe for recycled polymer scrap raw materials to be transferred to the raw material weighing hopper 120, analyze the weighing data transmitted from the raw material weighing hopper 120 in real time, and automatically control quantitative weighing;
Recycled polymer scrap quantitative supply system comprising a third processing unit provided to transmit and display notification signals in conjunction with the first processing unit and the second processing unit or to generate management data and control signals.

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