KR20240043203A - The apparatus for recycling the waste plastic - Google Patents

Abstract

The present invention relates to a pellet-type waste plastic recycling device that melts and injects waste plastic into a wire form and then cuts it into pellets to use as a material for other plastic molding devices. The present invention relates to a pellet-type waste plastic recycling device that can be used as a material for other plastic molding devices. A plastic recycling device includes a waste plastic crushing unit that crushes waste plastic to a certain size or less; An extrusion unit installed below the waste plastic grinding unit and manufacturing a wire rod by melting and extruding the waste plastic pulverized by the waste plastic grinding unit; a cooling unit installed in front of the extrusion unit and automatically cooling the wire manufactured by the extrusion unit; It is installed in front of the cooling unit and includes a pellet cutting unit that cuts the wire cooled by the cooling unit to a certain length to form a pellet.

Description

Pellet-type waste plastic recycling device {THE APPARATUS FOR RECYCLING THE WASTE PLASTIC}

The present invention relates to a waste plastic recycling device. More specifically, the present invention relates to a waste plastic recycling device, which melts and injects waste plastic into a wire form and then cuts it into pellets to use as a material for other plastic molding devices. It's about devices.

Waste plastic has recently emerged as a global environmental pollutant. Common treatment methods for waste plastic include landfill or incineration. However, except for biodegradable plastics, most plastics are not degradable and have a large volume compared to their weight, making it difficult to construct additional landfills. In this situation, waste plastics are disposed of, causing environmental pollution by landfilling and marine environmental pollution by being discarded in the sea. brings many problems.

Meanwhile, in the case of incineration of waste plastic, toxic gases such as dioxin are generated and energy loss is large, so a large investment in facilities is required to become an efficient alternative. Therefore, a method of appropriately recovering and recycling waste plastic is emerging as the best solution from the viewpoint of environmental protection and recovery of useful resources.

Research on the recycling of waste plastics is actively underway around the world, but to date, only the decomposition mechanisms of some plastics have been published, and there are few examples of concrete ways to recover waste plastics and reuse them economically. However, industrially, in the United States and Europe, a single composition of thermoplastic plastics such as HDPE, LDPE, and PP is mixed with sawdust and used as artificial wood.

Therefore, there is an urgent need to develop technology that can melt waste plastic and use it again as raw materials.

The technical problem to be solved by the present invention is to provide a pellet-type waste plastic recycling device that can melt and inject waste plastic into a wire form, then cut it into pellets and use it as a material for other plastic molding devices.

A pellet-type waste plastic recycling device according to the present invention for solving the above-described technical problem includes a waste plastic crushing unit that crushes waste plastic to a certain size or less; an extrusion unit installed below the waste plastic crushing unit and manufacturing a wire rod by melting and extruding the waste plastic pulverized by the waste plastic crushing unit; a cooling unit installed in front of the extrusion unit and automatically cooling the wire manufactured by the extrusion unit; It is installed in front of the cooling unit and includes a pellet cutting unit that cuts the wire cooled by the cooling unit to a certain length to form a pellet.

And in the present invention, the waste plastic crushing unit includes a hopper having an open top structure and into which a certain amount of waste plastic is input; A crushing blade installed below the hopper and crushing the waste plastic supplied by the hopper; a guide portion installed below the pulverizing blade and guiding the pulverized waste plastic material pulverized by the pulverizing blade to the extrusion unit; It is preferable to include a pressurizing part that is installed in the hopper and presses the waste plastic input into the hopper in the direction of the crushing blade.

In addition, in the present invention, the extrusion unit includes a melting cylinder installed in communication with the guide part and melting the waste plastic waste supplied through the guide part by applying heat; an extrusion cylinder extending to the same size and installed at the front of the melting cylinder and having an extrusion nozzle for extruding a wire; It is preferable to include a pressurizing unit installed at the rear end of the melting cylinder and extruding the melted waste plastic by applying pressure to the melting cylinder and the extrusion cylinder.

Additionally, in the present invention, the cooling unit includes a cooling water supply unit that supplies cooling water from top to bottom in front of the extrusion nozzle; a cooling water recovery unit installed below the cooling water supply unit and recovering the cooling water supplied from the cooling water supply unit; a coolant resupply unit that supplies the coolant recovered by the coolant recovery unit back to the coolant supply unit; It is preferable to include a cooling water temperature control unit installed in the cooling water resupply unit and cooling the cooling water to a certain temperature or lower.

In addition, in the present invention, the pellet cutting unit includes a wire pulling unit installed in front of the cooling unit and pulling the wire cooled by the cooling unit at a constant speed; a wire cutting unit installed in front of the wire pulling unit and cutting the wire pulled at a constant speed by the wire pulling unit to a constant length; It is preferable to include a pellet-shaped wire recovery unit installed below the wire cutting unit and recovering the pellet-shaped wire cut by the wire cutting unit.

In addition, in the present invention, the wire cutting unit includes a wire support jig that supports the wire pulled by the wire pulling unit on the upper surface; It is preferable to include a rotary cutting part rotatably installed in front of the wire support jig and having a plurality of cutting blades that rotate and cut the wire supported on the wire support jig.

In addition, the pellet-type waste plastic recycling device according to the present invention is preferably further provided with a cover surrounding the wire cutting portion and the pellet-type wire recovery portion from the outside.

In addition, the pellet-type waste plastic recycling device according to the present invention is preferably installed between the cooling unit and the wire cutting unit and further includes a moisture removal unit that removes moisture from the wire rod.

According to the pellet-type waste plastic recycling device according to the present invention, a remarkable effect can be achieved by melting and injecting waste plastic into a wire form, and then cutting it into pellets to use it as a material for other plastic molding devices. .

Figure 1 is a diagram showing the structure of a pellet-type waste plastic recycling device according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing the structure of an extrusion portion according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing the structure of a waste plastic crushing unit according to an embodiment of the present invention.
Figure 4 is a cross-sectional view showing the structure of a pellet cutting unit according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the attached drawings.

As shown in FIG. 1, the waste plastic recycling device 100 according to this embodiment includes a waste plastic crushing unit 110, an extrusion unit 120, a cooling unit 130, and a pellet cutting unit 140. It can be.

First, the waste plastic crushing unit 110 is a component that crushes waste plastic to be recycled to a certain size or less. That is, the waste plastic crushing unit 110 crushes the waste plastic collected for recycling into a size that can be processed by the extrusion unit 120 in a clean state and supplies it to the extrusion unit 120.

For this purpose, in this embodiment, the waste plastic grinding unit 110 includes a hopper 111, a grinding blade 112, a guide unit 113, and a pressurizing unit 114, as specifically shown in FIGS. 1 and 3. It can be configured to include. First, as shown in FIG. 1, the hopper 111 is a component that has an open top structure and an internal space into which a certain amount of waste plastic is input. And the lower end of the hopper 111 has a structure that is open in the direction of the grinding blade 112. Accordingly, the waste plastic supplied to the hopper 111 is sequentially supplied by its own weight in the direction of the grinding blade 112.

Next, the crushing blade 112 is installed on the lower side of the hopper 111, as shown in FIG. 1, and is a component that crushes the waste plastic supplied by the hopper 111. Accordingly, the shredding blade 112 is installed inside a certain installation box to prevent fragments from scattering to the outside during the process of shredding the waste plastic, and is configured to rotate by a motor 115 installed outside.

In addition, it is preferable that a plurality of blades are installed on the outer surface of the crushing blade 112 to have a structure capable of crushing waste plastics of various sizes and shapes into a constant size.

Next, the guide part 113 is installed below the grinding blade 112, as shown in FIG. 1, and guides the waste plastic pulverized by the grinding blade 112 into the extrusion unit 120. It is a guiding component. A blocking member (not shown in the drawing) is installed in the guide portion 113 to block the waste plastic supplied through the hopper 111 from moving downward after it is pulverized to a certain size. And when a certain amount of pulverized material or more is formed, the blocking member is opened by detection by a sensor and moves the pulverized material in the direction of the extrusion unit 120.

Next, the pressurizing unit 114 is installed on the upper side of the hopper 111, as shown in FIG. 3, and is a component that presses the waste plastic input into the hopper 111 in the direction of the crushing blade 112. . That is, the pressing unit 114 pushes from the top to the bottom so that all the waste plastic input by the crushing blade 112 is pulverized, and prevents fragments generated during the crushing process from scattering upward.

Therefore, the pressing part 114 has a structure that can be moved up and down by the motor 116.

Next, as shown in FIG. 1, the extrusion unit 120 is installed below the waste plastic crushing unit 110, and melts and extrudes the waste plastic pulverized by the waste plastic crushing unit 110 into a wire rod. It is a component for manufacturing (20). That is, the extrusion unit 120 applies heat to melt the pulverized material pulverized and supplied by the waste plastic pulverizing unit 110, and pressurizes the molten liquid to produce a wire rod.

To this end, in this embodiment, the extrusion unit 120 may be composed of a melting cylinder 121, an extrusion cylinder 122, and a pressing unit 124, as shown in FIGS. 1 and 2. First, the melting cylinder 121 is installed in communication with the guide part 113 and is a component that melts the waste plastic waste supplied through the guide part 113 by applying heat. Therefore, as shown in FIG. 2, the melting cylinder 121 preferably has a gate 126 installed at an opening opening upward to control the supply of pulverized material.

Next, the extrusion cylinder 122 is installed to extend to the same size at the front end of the melting cylinder 121, and is a component provided with an extrusion nozzle 123 for extruding the wire 20. That is, the extrusion cylinder 122 accommodates a certain amount of waste plastic 10 in a molten liquid state and ejects it in the direction of the extrusion nozzle 123 by the pressurizing part 124.

Next, the pressurizing unit 124 is installed at the rear end of the melting cylinder 121, as shown in FIGS. 1 and 2, and applies pressure to the melting cylinder 121 and the extrusion cylinder 122 to produce molten waste. It is a component that extrudes plastic. Therefore, the pressing unit 124 may be composed of a pressing pad 127 that moves within the melting cylinder and the extrusion cylinder, and a motor 124 that moves the pressing pad 127.

Next, the cooling unit 130 is installed in front of the extrusion unit 120, as shown in FIG. 1, and is a component that automatically cools the wire manufactured by the extrusion unit 120. In other words, the cooling unit 130 quickly cools the wire 20 manufactured by extruding at a high temperature to maintain and stabilize its shape.

For this purpose, in this embodiment, the cooling unit 130 is specifically configured as shown in FIG. 1, a cooling water supply unit 131, a cooling water recovery unit 132, a cooling water resupply unit 133, and a cooling water temperature control unit 134. It can be configured including.

First, as shown in FIG. 1, the coolant supply unit 131 is a component that supplies coolant from top to bottom in front of the extrusion nozzle 123 to rapidly cool the wire 20 being manufactured. That is, the coolant supply unit 131 continuously sprays coolant cooled to a constant temperature from the top to the bottom to cool the wire 20 manufactured through the extrusion nozzle 123 without deformation.

Next, the coolant recovery unit 132 is installed below the coolant supply unit 131, as shown in FIG. 1, and is a component that recovers the coolant supplied from the coolant supply unit 131. That is, the cooling water recovery unit 132 has a cylindrical shape with an open top and has an internal space of a certain volume. Therefore, the coolant continuously supplied from the coolant supply unit 131 is received and recovered.

Next, the coolant resupply unit 133 is a component that supplies the coolant recovered by the coolant recovery unit 132 back to the coolant supply unit 131, as shown in FIG. 1. That is, the coolant resupply unit 133 is composed of a pipe connecting the coolant recovery unit 132 and the coolant supply unit 131, and is equipped with a pump (not shown in the drawing) that circulates coolant through this pipe. It has a composition.

Next, the coolant temperature control unit 134 is installed in the coolant resupply unit 133, as shown in FIG. 1, and is a component that cools the coolant to a certain temperature or lower. That is, the coolant temperature control unit 134 cools the temperature of the coolant recovered by the coolant resupply unit 133 to a certain temperature or lower and supplies it to the coolant supply unit 131.

Next, the pellet cutting unit 140 is installed in front of the cooling unit 130, as shown in FIG. 1, and cuts the wire 20 cooled by the cooling unit 130 to a certain length to form pellets. It is a component that creates form. That is, the pellet cutting unit 140 cuts the wire 20 made of waste plastic by the waste plastic crushing unit 110, the extrusion unit 120, and the cooling unit 130 into pellets to be used as raw materials for other manufacturing processes. It is prepared so that it can be used.

To this end, in this embodiment, the pellet cutting unit 140 can be configured to include a wire pulling unit 141, a wire cutting unit 142, and a pellet-type wire recovery unit 143, as specifically shown in FIG. 4. there is. First, as shown in FIG. 1, the wire pulling unit 141 pulls the wire 20 that has passed through the cooling unit 130 from the front of the cooling unit 130 toward the wire cutting unit 142. It is a component. At this time, the speed at which the wire 20 is pulled by the wire pulling unit 141 determines the cutting length of the wire 20, so the speed at which the wire 20 is pulled is precisely controlled.

Next, as shown in FIG. 4, the wire cutting part 142 is installed in front of the wire pulling part 141, and the wire 20 is pulled at a constant speed by the wire pulling part 141. It is a component that is cut to a certain length. In this embodiment, the wire cutting part 142 may be configured to include a wire support jig 142a and a rotation cutting part 142b, as shown in FIG. 4 .

The wire support jig 142a is a component that supports the wire 20 cut by the rotary cutting part 142b from the lower side, and the rotary cutting part 142b is the wire support jig, as shown in FIG. 4. (142a) is a component rotatably installed in the front and provided with a plurality of cutting blades that rotate and cut the wire 20 supported on the wire support jig 142a.

Next, the pellet-shaped wire recovery unit 143 is installed below the wire cutting unit 142, as shown in FIG. 4, and recovers the pellet-shaped wire 30 cut by the wire cutting unit 142. It is a component that does.

And, as shown in FIGS. 1 and 4, the pellet-type waste plastic recycling device 100 according to this embodiment includes a cover 144 that surrounds the wire cutting part 142 and the pellet-type wire recovery part 143 from the outside. It is desirable to further provide. The cover 144 surrounds the wire cutting part 142 and the pellet-type wire recovery part 143 from the outside to provide an installation space and operating space for them. In particular, the pellet-shaped wire cutting part 142 is cut by the wire cutting part 142. Prevents the wires 30 from scattering to the outside.

Meanwhile, as shown in FIG. 1, the waste plastic recycling device 100 according to this embodiment is preferably further provided with a water removal unit 150. The moisture removal unit 150 is installed between the cooling unit 130 and the winding unit 140, and is a component that removes moisture from the wire 20. Therefore, it is possible to produce a wire rod from which moisture has been removed by the moisture removal unit 150.

100: Pellet-type waste plastic recycling device according to an embodiment of the present invention
110: waste plastic crushing unit 120: extrusion unit
130: Cooling unit 140: Pellet cutting unit
150: moisture removal unit

Claims (8)

A waste plastic crushing unit that crushes waste plastic to a certain size or less;
An extrusion unit installed below the waste plastic grinding unit and manufacturing a wire rod by melting and extruding the waste plastic pulverized by the waste plastic grinding unit;
a cooling unit installed in front of the extrusion unit and automatically cooling the wire manufactured by the extrusion unit;
A pellet-type waste plastic recycling device including a pellet cutting unit installed in front of the cooling unit and cutting the wire cooled by the cooling unit into a predetermined length to form a pellet. The method of claim 1, wherein the waste plastic grinding unit,
A hopper with an open upper structure into which a certain amount of waste plastic is input;
A crushing blade installed below the hopper and crushing the waste plastic supplied by the hopper;
a guide portion installed below the pulverizing blade and guiding the pulverized waste plastic material pulverized by the pulverizing blade to the extrusion unit;
A pellet-type waste plastic recycling device comprising a pressurizing unit installed in the hopper and pressurizing the waste plastic input into the hopper in the direction of the crushing blade. The method of claim 2, wherein the extrusion unit,
a melting cylinder installed in communication with the guide part and melting the waste plastic waste supplied through the guide part by applying heat;
an extrusion cylinder extending to the same size and installed at the front of the melting cylinder and having an extrusion nozzle for extruding a wire;
A pressurizing unit installed at a rear end of the melting cylinder and extruding the melted waste plastic by applying pressure to the melting cylinder and the extrusion cylinder. The method of claim 3, wherein the cooling unit,
a coolant supply unit supplying coolant from top to bottom in front of the extrusion nozzle;
a cooling water recovery unit installed below the cooling water supply unit and recovering the cooling water supplied from the cooling water supply unit;
a coolant resupply unit that supplies the coolant recovered by the coolant recovery unit back to the coolant supply unit;
A pellet-type waste plastic recycling device comprising: a cooling water temperature control unit installed in the cooling water resupply unit and cooling the cooling water to a certain temperature or lower. The method of claim 4, wherein the pellet cutting unit,
a wire pulling unit installed in front of the cooling unit and pulling the wire cooled by the cooling unit at a constant speed;
a wire cutting unit installed in front of the wire pulling unit and cutting the wire pulled at a constant speed by the wire pulling unit to a constant length;
A pellet-type waste plastic recycling device comprising: a pellet-type wire recovery unit installed below the wire cutting unit and recovering the pellet-shaped wire cut by the wire cutting unit. The method of claim 5, wherein the wire cutting unit,
A wire support jig that supports the wire pulled by the wire pulling unit on the upper surface;
A pellet-type waste plastic recycling device comprising: a rotatable cutting unit rotatably installed in front of the wire support jig and having a plurality of cutting blades for cutting the wire supported on the wire support jig while rotating. According to clause 6,
A pellet-type waste plastic recycling device further comprising a cover surrounding the wire cutting portion and the pellet-type wire recovery portion on the outside. According to clause 4,
A pellet-type waste plastic recycling device that is installed between the cooling unit and the wire cutting unit and further includes a moisture removal unit that removes moisture from the wire.

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