Apparatus for manufacturing waste plastic molded products and method for manufacturing waste plastic molded products

Abstract

To provide a manufacturing device for a waste plastic molded product that can easily suppress unevenness in a quality of the molded product.SOLUTION: A manufacturing device 100 includes a container 10, a transfer part 20, and an extrusion molding part 30. The extrusion molding part 30 has a plurality of molding nozzles 31 that protrude from a molding side wall 16 toward an exterior side of the container 10. Furthermore, the manufacturing device 100 includes a nozzle cooling part 60 that sprays a cooling liquid W toward an outer circumferential surface 31A of the plurality of molding nozzles 31. The nozzle cooling part 60 has an inner cooling part 60B that sprays the cooling liquid W from inside a region (nozzle arrangement region R) where the molding nozzle 31 is arranged.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to an apparatus for manufacturing a waste plastic molded product and a method for manufacturing a waste plastic molded product.

Background Art

[0002] In order to recycle waste plastics contained in household waste and the like, there is a technique of chemically converting waste plastics using a coke oven. In order to introduce waste plastics into the coke oven, it is necessary to mold the waste plastics into a molded product having a predetermined shape. Patent Document 1 discloses an apparatus for manufacturing a waste plastic molded product.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the apparatus for manufacturing a waste plastic molded product of Patent Document 1, an extrusion molding section for molding a waste plastic molded product has a plurality of molding nozzles protruding toward the outer side of the container. And a nozzle cooling section for ejecting a coolant toward the outer peripheral surface of these plurality of molding nozzles is provided.

[0005] The inventors have focused on the fact that in the above manufacturing apparatus, unevenness in the quality of the waste plastic molded product occurs if there are molding nozzles that are difficult to cool among the plurality of molding nozzles or parts of the molding nozzles that are difficult to cool.

[0006] One object of the present disclosure is to provide an apparatus for manufacturing a waste plastic molded product that is easy to suppress unevenness in the quality of the molded product. Another object of the present disclosure is to provide a method for manufacturing a waste plastic molded product in which unevenness in quality is suppressed. [Means for solving the problem]

[0007] The gist of this disclosure is as follows:

[0008] <1> A container into which waste plastic raw materials are placed, A transfer unit that transfers the waste plastic raw material placed inside the container toward the molded side wall which is a part of the container's wall, An extrusion molding unit that connects the inside and outside of the container via the molded side wall and molds a waste plastic molded product, the extrusion molding unit having a plurality of molding nozzles protruding from the molded side wall toward the outside of the container, A nozzle cooling unit that sprays cooling liquid toward the outer circumferential surface of the plurality of molding nozzles, Equipped with, The plurality of molding nozzles are arranged in a nozzle arrangement region that surrounds the extension of the shaft of the transfer unit. The nozzle cooling unit has an inner cooling unit that ejects coolant from the inside of the nozzle arrangement area. A manufacturing device for waste plastic molded products. (Effects and Benefits) The waste plastic molded product manufacturing apparatus (hereinafter sometimes simply referred to as "manufacturing apparatus") according to this embodiment comprises a container, a transfer unit, and an extrusion molding unit. Waste plastic raw material is introduced into the container. The transfer unit transfers the waste plastic raw material introduced into the container toward the molding side wall, which is a wall that constitutes part of the container. The extrusion molding unit communicates the inside and outside of the container via the molding side wall and molds the waste plastic molded product. Furthermore, the extrusion molding unit has a plurality of molding nozzles that protrude from the molding side wall toward the outside of the container. Here, the manufacturing apparatus includes a nozzle cooling unit that sprays cooling liquid toward the outer surfaces of multiple molding nozzles. Therefore, the molding nozzles can be cooled by the nozzle cooling unit, and the solidification of the raw material inside the molding nozzles can be promoted. Furthermore, the nozzle cooling unit has an internal cooling unit that ejects coolant from inside the area where the molding nozzle is positioned. Therefore, among the multiple molding nozzles, it is possible to appropriately cool molding nozzles or parts that are difficult to cool if the coolant is ejected from outside the nozzle positioning area. Therefore, according to this embodiment, it is easier to suppress variations in the quality of the molded product compared to an embodiment in which the nozzle cooling section does not have an internal cooling section.

[0009] <2> The inner cooling section has a downward-facing nozzle that directs the ejection direction downwards. <1> A manufacturing apparatus for waste plastic molded products as described above. (Effects and Benefits) According to this embodiment, the molding nozzle located at the bottom of the nozzle arrangement region can be effectively cooled. Furthermore, a downward-facing nozzle, which directs the ejection direction downwards, includes not only nozzles that eject directly downwards, but also nozzles that eject diagonally downwards.

[0010] <3> The nozzle cooling unit has an outer cooling unit that ejects coolant from outside the nozzle arrangement area. <1> or <2> A manufacturing apparatus for waste plastic molded products as described above. (Effects and Benefits) In this embodiment, since the nozzle cooling unit has an inner cooling unit and an outer cooling unit, multiple molding nozzles can be effectively cooled.

[0011] <4> The outer cooling section does not have an outlet for ejecting coolant from below the nozzle arrangement area. <3> A manufacturing apparatus for waste plastic molded products as described above. (Effects and Benefits) According to this embodiment, the apparatus configuration can be simplified. Even if the outer cooling unit does not have an outlet that ejects coolant from below the nozzle arrangement area, an inner cooling unit is provided, making it easier to suppress inconsistencies in the quality of the molded product.

[0012] <5> The inner cooling part has four ejection ports with different ejection directions. The manufacturing apparatus for a waste plastic molded product according to any one of <1> to <4>. (Function and effect) According to this aspect, since the coolant can be ejected in four directions, effective cooling can be achieved.

[0013] <6> The inner cooling part has an upper ejection port whose ejection direction is upward, a lower ejection port whose ejection direction is downward, and a pair of side ejection ports whose ejection directions are horizontal. The manufacturing apparatus for a waste plastic molded product according to any one of <1> to <5>.

[0014] <7> A pair of shafts are provided in the transfer part. The region formed by combining two annular regions surrounding the extension lines of the pair of shafts is the nozzle arrangement region. A pair of inner cooling parts are provided. The pair of inner cooling parts eject the coolant from the inside of each of the two annular regions. The manufacturing apparatus for a waste plastic molded product according to any one of <1> to <6>.

[0015] <8> A method for manufacturing a waste plastic molded product, which is performed using the manufacturing apparatus for a waste plastic molded product according to any one of <1> to <7>. [[ID=4​​​​​​​​​​​​​This figure shows an extrusion molding section and a nozzle cooling section according to a modified example. [Modes for carrying out the invention]

[0017] Preferred embodiments of the present invention will be described in detail below. Note that components having substantially the same function will be denoted by the same reference numerals, and redundant descriptions will be omitted.

[0018] <Manufacturing equipment for waste plastic molded products> First, a manufacturing apparatus 100 for waste plastic molded products P according to an embodiment of the present invention (hereinafter simply referred to as the manufacturing apparatus 100) will be described.

[0019] Figure 1 is a schematic diagram showing the overall configuration of the manufacturing apparatus 100.

[0020] The manufacturing apparatus 100 is a device for molding a waste plastic molded product P (hereinafter simply referred to as molded product P) having a predetermined shape by crushing, kneading, heating, and other processes on waste plastic raw material M (hereinafter simply referred to as raw material M), and then extruding it. The molded product P is, for example, inserted into a coke oven together with coal and recycled as a chemical raw material.

[0021] Raw material M includes plastic waste, including used plastic containers. Specifically, raw material M includes plastic waste whose main components are resin materials such as polyethylene, polystyrene, and polypropylene.

[0022] The raw material M may be partially crushed before being introduced into the molded product P manufacturing apparatus 100. Alternatively, the raw material M may be partially kneaded and heated before being introduced into the molded product P manufacturing apparatus 100. In this case, the kneading and heating of the raw material M in the container 10 may be omitted or performed in a simplified manner.

[0023] The manufacturing apparatus 100 includes a container 10, a transfer unit 20, an extrusion molding unit 30, and a cutting unit 70. First, the raw material M is introduced into the container 10 via the hopper 13. The introduced raw material M is kneaded and heated while being transferred from one end 11 to the other end 15 of the container 10 by the transfer unit 20. Then, the raw material M is extruded into a predetermined shape via the extrusion molding unit 30, and the surface of the raw material M is sufficiently solidified by cooling in the extrusion molding unit 30. After that, the raw material M is cut by the cutting unit 70, and as a result, the molded product P is finally formed.

[0024] (container) The container 10 is a housing capable of containing the raw material M. The container 10 has a hopper 13 that opens toward the Z direction at one end 11 in the Y direction in Figure 1. The raw material M is put into the container 10 via the hopper 13. The raw material M is kneaded and heated inside the container 10. At this time, the raw material M may be heated to approximately 140°C or higher inside the container 10, for example.

[0025] If the heating temperature inside the container 10 is less than approximately 140°C, the raw material M will not melt sufficiently, and the surface of the molded product P will not solidify sufficiently during the molding process. In other words, by raising the temperature inside the container 10 to approximately 140°C or higher, sufficient solidification of the molded product P during the molding process can be ensured.

[0026] When the raw material M is heated to approximately 140°C or higher inside the container 10, it does not mean that the entire area inside the container 10 is heated to 140°C or higher; it is sufficient that the raw material M near the extrusion molding section 30 inside the container 10 is heated to 140°C or higher.

[0027] A portion of the transfer section 20 is provided inside the container 10, and the transfer section 20 transfers the raw material M toward the other end 15 in the Y direction of the container 10. A faceplate 17 is provided at the other end 15 of the container 10. The faceplate 17 is a plate-shaped member provided at the other end 15 of the container 10, and an extrusion molding section 30 is provided on the faceplate 17. The thickness, shape, etc. of the faceplate 17 can be appropriately set considering the pressing force in extrusion molding, etc. The faceplate 17 constitutes the molded side wall 16 located at the other end 15 of the container 10.

[0028] Furthermore, the container 10 is provided with a container cooling section 40. Specifically, as shown in Figure 1, a flow path 41 is formed inside the outer peripheral wall 19 of the container 10. As the refrigerant C flows through the flow path 41, the raw material M inside the container 10 is cooled by removing heat.

[0029] (transfer department) The transfer unit 20 transfers the raw material M in the container 10 toward the other end 15 of the container 10. Specifically, the transfer unit 20 has a so-called twin-screw extrusion mechanism. The transfer unit 20 has a pair of shafts 21 whose axial direction is along the Y direction, a reduction mechanism 23 connected to the axial ends of the shafts 21, and a drive source 25 that applies rotational force to the shafts 21 via the reduction mechanism 23. Note that the pair of shafts 21 are arranged side by side in the X direction, so only one shaft 21 is shown in Figure 1. The rotation direction of the pair of shafts 21 may be the same direction or opposite directions, and is set appropriately according to the mixing, heating state, etc. of the raw material M in the container 10.

[0030] The outer circumferential surfaces of the pair of shafts 21 are provided with screw portions 27 having helical, blade-like sections. As the shafts 21 rotate, the raw material M is transferred by these screw portions 27 from one end 11 to the other end 15 of the container 10. In addition, the rotation of the screw portions 27 on the pair of shafts 21 kneads the raw material M and heats it through friction.

[0031] Furthermore, the pair of shafts 21 may be provided with kneading discs (not shown). The kneading discs are located in the axial middle of the shafts 21. The rotation of the kneading discs on the pair of shafts 21 further kneads the raw material M and heats it through friction.

[0032] (Extrusion molding section) The extrusion molding section 30 is the part that connects the inside and outside of the container 10 via the molding side wall 16, and is the part that forms the molded product P.

[0033] Specifically, the extrusion molding section 30 is equipped with a plurality of molding nozzles 31. The molding nozzles 31 are cylindrical (specifically, cylindrical). The faceplate 17 has a plurality of through holes (nozzle placement holes 17D, see Figure 2) that penetrate through the faceplate 17, and the plurality of molding nozzles 31 are arranged with their insertions into these plurality of nozzle placement holes 17D.

[0034] More specifically, the molding nozzle 31 has its base end positioned inside the through-hole of the faceplate 17, and its tip end protruding from the outer surface 17A of the faceplate 17. Because the tip end of the molding nozzle 31 protrudes from the outer surface 17A of the faceplate 17, the time that the raw material M is in contact with the inner circumferential surface 31B of the extrusion molding section 30 is increased. As a result, the molten surface of the raw material M is sufficiently solidified.

[0035] Figure 2 shows the extrusion molding section 30 viewed from the direction opposite to the faceplate 17 (+Y direction). As shown in Figure 2, the multiple (18 in Figure 2) molding nozzles 31 constituting the extrusion molding section 30 are arranged in a region R (hereinafter referred to as the nozzle arrangement region R) surrounding the extension of the shaft 21. Specifically, since there is a pair of shafts 21, there is an annular region r surrounding the extension of one shaft 21 and an annular region r surrounding the extension of the other shaft 21. The two annular regions r partially overlap. As a result, the nozzle arrangement region R is shaped like a figure eight.

[0036] In Figure 2, the molding nozzles 31 are arranged in a single ring within the annular region r. However, the molding nozzles 31 may be arranged in a double or triple ring. In the example shown in Figure 2, molding nozzles 31 are positioned to correspond to all the through-holes formed in the faceplate 17. However, depending on the required number of molding nozzles 31, some of the through-holes may be closed by inserting a blocking member instead of a molding nozzle 31.

[0037] (cutting part) The cutting section 70 cuts the raw material M that has been extruded in the extrusion molding section 30. In the extrusion molding section 30, the outer surface of the extruded raw material M is solidified, and the outer shape of the raw material M is maintained, making it easy to cut. By cutting with the cutting section 70, the cutting point can be controlled compared to when the raw material M breaks due to its own weight.

[0038] The cutting section 70, as an example, includes a rotating blade 71, a drive source 73, and a cutting section shaft 75. The rotating blade 71 is a part with a blade at the end of an arm that extends radially. One end of the cutting section shaft 75 is provided at the radial center of the arm of the rotating blade 71. The drive source 73 is attached to the other end of the cutting section shaft 75. The drive source 73 applies rotational force to the rotating blade 71 via the cutting section shaft 75. The raw material M extruded from the extrusion molding section 30 is cut by contact with the rotating blade 71, forming a molded product P.

[0039] (Container cooling section) Furthermore, the manufacturing apparatus 100 has a container cooling unit 40. The container cooling unit 40 removes heat from the raw material M inside the container 10 by circulating a coolant C through a flow path 41 provided in the container 10. As a result, the raw material M inside the container 10 is cooled.

[0040] Specifically, as shown in Figure 1, a flow path 41 is formed within the outer circumferential wall 19 of the container 10. For example, this flow path 41 is tubular with a circular cross-section. Furthermore, the flow path 41 is formed in a spiral shape within the container 10. That is, it is formed in a circumferential manner along the in-plane direction of the outer circumferential wall 19 of the container 10, with a predetermined pitch along the direction (Y direction) in which the raw material M is transported.

[0041] The refrigerant C is introduced into or discharged from the flow path 41 through one end 41A and the other end 41B of the flow path 41.

[0042] As shown in Figure 1, the container cooling unit 40 may have a circulation mechanism 43. The circulation mechanism 43 circulates the refrigerant C, repeatedly introducing and discharging it into the flow path 41 within the container 10. Specifically, as shown in Figure 1, the circulation mechanism 43 includes a chiller 43A and a pump 43B. The chiller 43A cools the refrigerant C discharged from the flow path 41 to a predetermined temperature. Specifically, the chiller 43A cools the refrigerant C to a temperature of 5°C or more and approximately 80°C or less. Known cooling methods for circulating refrigerants can be appropriately employed for the cooling technology in the chiller 43A. The pump 43B circulates the refrigerant C at a predetermined pressure. Depending on the type of refrigerant C and the required pressure, known pumping methods can be appropriately employed for the pump 43B.

[0043] (heating part) Furthermore, the manufacturing apparatus 100 has a heating unit 50 that can adjust the temperature of the faceplate 17. The heating section 50 is, for example, a resistance-heating heater 51 provided inside the faceplate 17. The heater 51 is connected to a heating power supply 53 and heats the faceplate 17 and its vicinity by generating heat inside the faceplate 17. Heating by the heating section 50 provided on the faceplate 17 at the other end 15 of the container 10 suppresses the temperature drop of the raw material M. In other words, the molten state of the raw material M inside the extrusion molding section 30 is maintained.

[0044] (Nozzle cooling section) Furthermore, the manufacturing apparatus 100 has a nozzle cooling unit 60. The nozzle cooling unit 60 cools the molding nozzle 31 by spraying a cooling liquid W (cooling water) toward the outer circumferential surface 31A of the molding nozzle 31. Cooling the molding nozzle 31 promotes the solidification of the molten surface of the raw material M. This suppresses the expansion of the molded product P after molding, resulting in a higher density molded product P. Furthermore, the molded product P having a predetermined rigidity makes it easier to cut by the cutting unit 70 described later.

[0045] In the cooling by the nozzle cooling unit 60, for example, the molding nozzle 31 is cooled to approximately 100°C or below. If the temperature of the molding nozzle 31 is higher than approximately 100°C even after cooling by the nozzle cooling unit 60, the surface of the molten raw material M will not solidify sufficiently. As a result, high density of the molded product P cannot be achieved.

[0046] As shown in Figure 1, the nozzle cooling unit 60 has an outlet 61 from which the coolant W is ejected, and a pump 63 that supplies the coolant W to the outlet 61.

[0047] As shown in Figure 2, the nozzle cooling unit 60 has multiple nozzles 61A, 61B, 61C, 61D, and 61E. The nozzle cooling unit 60 has an outer cooling unit 60A that ejects coolant W from outside the nozzle arrangement area R, and an inner cooling unit 60B that ejects coolant W from inside the nozzle arrangement area R. The multiple nozzles 61A, 61B, 61C, 61D, 61E can be divided into nozzles 61A, 61B that are located outside the nozzle arrangement area R and function as the outer cooling unit 60A, and nozzles 61C, 61D, 61E that are located inside the nozzle arrangement area R and function as the inner cooling unit 60B. By providing an inner cooling section 60B in addition to the outer cooling section 60A, the molding nozzle 31, which is difficult to cool with the outer cooling section 60A, and parts of the molding nozzle 31 that are difficult to cool with the outer cooling section 60A (for example, the lower surface of the molding nozzle located at the top of the annular region r) can be effectively cooled. The spray angle of each nozzle is set appropriately to ensure proper cooling of the multiple molding nozzles 31. The spray angle is, for example, approximately 90 degrees. The spray angle refers to the spread angle of the coolant W sprayed from the nozzle.

[0048] The outer cooling section 60A has a plurality of downward nozzles 61A and a plurality of lateral nozzles 61B. The downward nozzles 61A are nozzles with the ejection direction directed downward, and the lateral nozzles 61B are nozzles with the ejection direction directed laterally (horizontal direction, ±X direction). The lateral nozzles 61B include lateral nozzles 61B with the ejection direction directed in the +X direction and lateral nozzles 61B with the ejection direction directed in the -X direction. The number of downward nozzles 61A and lateral nozzles 61B are the same, four of each in the example shown in Figure 2. The downward nozzles 61A are located above the nozzle arrangement area R, and the lateral nozzles 61B are located to the sides of the nozzle arrangement area R.

[0049] Two inner cooling sections 60B are provided, one for each of the two annular regions r. Each of the two inner cooling sections 60B is located inside each of the two annular regions r. Each of the two inner cooling sections 60B has an upper nozzle 61C, a lower nozzle 61D, and a pair of lateral nozzles 61E. The upper nozzle 61C is a nozzle with an upward ejection direction, the lower nozzle 61D is a nozzle with a downward ejection direction, and the lateral nozzles 61E are nozzles with a lateral (horizontal) ejection direction.

[0050] (Temperature sensor) Furthermore, the manufacturing apparatus 100 has a temperature sensor 31C for measuring the temperature of the molding nozzle 31. The temperature sensor 31C may be positioned to measure the temperature of the intermediate portion of the wall thickness in the radial direction of the extrusion molding section 30. The temperature sensor 31C is, for example, a thermocouple. Furthermore, the manufacturing apparatus 100 has a temperature sensor 17C capable of detecting the temperature of the faceplate 17. The temperature sensor 17C is, for example, a thermocouple used in a state where it is inserted inside the faceplate 17. The temperature sensor 17C is positioned within a range that can detect the heating temperature of the heater 51 provided inside the faceplate 17.

[0051] (Control Unit) The manufacturing apparatus 100 has a control unit 90. The control unit 90 controls the molding process of the molded product P in the manufacturing apparatus 100.

[0052] Specifically, the control unit 90 controls the heating of the area around the faceplate 17 by the heating unit 50 based on the output from the temperature sensor 17C. The control unit 90 controls the cooling of the extrusion molding unit 30 by the nozzle cooling unit 60 based on the output from the temperature sensor 31C. In other words, in this embodiment, the temperature sensor for heating control is the temperature sensor 17C, and the temperature sensor for cooling control is the temperature sensor 31C. Furthermore, the control unit 90 controls the rotation speed of the drive source 73 for the cutting unit 70 and the drive source 25 for the transfer unit 20, etc.

[0053] Furthermore, during cooling by the container cooling unit 40, the control unit 90 controls at least one of the flow rate and temperature of the refrigerant C introduced into the flow path 41 based on the output from the temperature sensor 17C and / or the temperature sensor 31C. Specifically, the control unit 90 controls the operation of the chiller 43A and / or the pump 43B so that the temperature detected by the temperature sensor 31C is below a predetermined temperature (for example, below 100°C).

[0054] The functions of the control unit 90 are realized, for example, through the cooperation of the CPU (Central Processing Unit), memory, and storage. Specifically, the CPU functions as the control unit 90 by executing the control program for the manufacturing equipment 100 stored in the storage on the memory.

[0055] <Method for manufacturing waste plastic molded products> Next, a method for manufacturing the waste plastic molded product P according to this embodiment will be described.

[0056] First, the waste plastic raw material M is put into container 10. Next, the waste plastic raw material M is kneaded and heated inside container 10.

[0057] Furthermore, the waste plastic raw material M, heated to 150°C or higher, is transferred toward the extrusion molding section 30, which is located at the end of the container 10 and connects the inside and outside of the container 10. The waste plastic raw material M is transferred toward the end of the container 10 and is extruded through the extrusion molding section 30. At this time, the extrusion molding section 30 is cooled to 100°C or lower, at least while the waste plastic raw material M is being extruded through the extrusion molding section 30. Finally, the waste plastic raw material M is extruded from the extrusion molding section 30 and cut by the cutting section 70 to form a waste plastic molded product P.

[0058] (Effects and Benefits) Next, the effects and advantages of this embodiment will be described.

[0059] In this embodiment, the manufacturing apparatus 100 comprises a container 10, a transfer unit 20, and an extrusion molding unit 30. Waste plastic raw material M is placed inside the container 10. The transfer unit 20 transfers the waste plastic raw material M placed inside the container 10 toward the molding side wall 16, which is a wall that constitutes part of the container 10. The extrusion molding unit 30 connects the inside and outside of the container 10 via the molding side wall 16 and molds a waste plastic molded product P. The extrusion molding unit 30 has a plurality of molding nozzles 31 that protrude from the molding side wall 16 toward the outside of the container 10. Here, the manufacturing apparatus 100 includes a nozzle cooling unit 60 that sprays a cooling liquid W toward the outer circumferential surfaces 31A of the multiple molding nozzles 31. Therefore, the molding nozzles 31 can be cooled by the nozzle cooling unit 60, and the solidification of the raw material M inside the molding nozzles 31 can be promoted. Furthermore, the nozzle cooling unit 60 has an inner cooling unit 60B that ejects coolant W from inside the area where the molding nozzle 31 is located (nozzle arrangement area R). Therefore, among the multiple molding nozzles 31, it is possible to appropriately cool the molding nozzle 31 or parts that are difficult to cool if the coolant W is ejected from outside the nozzle arrangement area R. Therefore, according to this embodiment, it is easier to suppress variations in the quality of the molded product P compared to an embodiment in which the nozzle cooling unit 60 does not have an inner cooling unit 60B.

[0060] Furthermore, in this embodiment, the inner cooling section 60B has a downward nozzle 61A that directs the ejection direction downward. Therefore, the molding nozzle 31 located at the bottom of the nozzle arrangement region R can be effectively cooled.

[0061] Furthermore, in this embodiment, the nozzle cooling unit 60 has an outer cooling unit 60A that ejects coolant W from outside the nozzle arrangement area R. Therefore, since the nozzle cooling unit 60 has an inner cooling unit 60B and an outer cooling unit 60A, multiple molding nozzles 31 can be effectively cooled.

[0062] Furthermore, in this embodiment, the outer cooling unit 60A does not have an outlet for ejecting the coolant W from below the nozzle arrangement area R. Therefore, the configuration of the manufacturing apparatus 100 can be simplified. In this embodiment, since an inner cooling unit 60B is provided, it is easier to suppress variations in the quality of the molded product even if the outer cooling unit 60A does not have an outlet for ejecting the coolant W from below the nozzle arrangement area R.

[0063] Furthermore, in this embodiment, the inner cooling section 60B has four nozzles 61 with different ejection directions. Therefore, the coolant W can be ejected in four directions, enabling effective cooling.

[0064] <Supplementary explanation> The embodiments of the invention have been described above, but this disclosure is not limited thereto. Further details are provided below for clarification.

[0065] In the above embodiment, an example was described in which the inner cooling section 60B has an upper nozzle 61C, a lower nozzle 61D, and a pair of lateral nozzles 61E (see Figure 2). However, the configuration of the inner cooling section may be as shown in Figure 3. The inner cooling section 160B shown in Figure 3 has four nozzles 161C and 161D, each with an ejection direction changed by approximately 45 degrees. The four nozzles 161C and 161D consist of two nozzles 161C with an ejection direction diagonally upward and two nozzles 161D with an ejection direction diagonally downward.

[0066] In the above embodiment, an example was described in which the inner cooling unit 60B has a plurality (four) of nozzles 61, but the inner cooling unit 60B of this disclosure is not limited to this. The number of nozzles 61 in the inner cooling unit 60B may be one or a plurality other than four. Furthermore, the nozzle 61 of the inner cooling section 60B may be configured to be rotatable so that the direction of discharge can be changed. In this case, it is preferable to configure it to rotate automatically. Even when the nozzle 61 is configured to be rotatable, the number of nozzles is not particularly limited.

[0067] In the above embodiment, an example was described in which the outer cooling unit 60A does not have an outlet for ejecting coolant W from below the nozzle arrangement region R, but the outer cooling unit of this disclosure is not limited to this. The outer cooling unit may have an outlet for ejecting coolant W from below the nozzle arrangement region.

[0068] In the above embodiment, an example was described in which the transfer unit 20 has a pair of shafts 21, but the transfer unit of this disclosure is not limited thereto. The number of shafts in the transfer unit may be as few as one. [Explanation of symbols]

[0069] 10 containers 16 Molded side wall 20 Transfer section 21 Shaft 30 Extrusion molding section 31 Molding nozzle 31A Outer surface 60 Nozzle Cooling Unit 60A outer cooling section 61A Lower spout 61B Side spout 60B Inner cooling section 61C Upper spout 61D Lower spout 61E Side spout 160B Inner cooling section 100 Manufacturing equipment M Waste plastic raw materials P Waste plastic molded products R nozzle placement area r Circular region W Coolant

Claims

1. A container into which waste plastic raw materials are placed, A transfer unit that transfers the waste plastic raw material placed inside the container toward the molded side wall which is a part of the container's wall, An extrusion molding unit that connects the inside and outside of the container via the molded side wall and molds a waste plastic molded product, the extrusion molding unit having a plurality of molding nozzles protruding from the molded side wall toward the outside of the container, A nozzle cooling unit that sprays cooling liquid toward the outer circumferential surface of the plurality of molding nozzles, Equipped with, The plurality of molding nozzles are arranged in a nozzle arrangement region that surrounds the extension of the shaft of the transfer unit. The nozzle cooling unit has an inner cooling unit that ejects coolant from the inside of the nozzle arrangement area. A manufacturing device for waste plastic molded products.

2. The inner cooling section has a downward-facing nozzle that directs the ejection direction downwards. The apparatus for manufacturing waste plastic molded products according to claim 1.

3. The nozzle cooling unit has an outer cooling unit that ejects coolant from outside the nozzle arrangement area. An apparatus for manufacturing waste plastic molded products according to claim 1 or claim 2.

4. The outer cooling section does not have an outlet for ejecting coolant from below the nozzle arrangement area. The apparatus for manufacturing waste plastic molded products according to claim 3.

5. The inner cooling section has four nozzles with different ejection directions. An apparatus for manufacturing waste plastic molded products according to claim 1 or claim 2.

6. The aforementioned inner cooling section is An upward-facing nozzle where the ejection direction is upward, A downward-facing nozzle where the ejection direction is downward, It has a pair of lateral nozzles whose ejection direction is horizontal, An apparatus for manufacturing waste plastic molded products according to claim 1 or claim 2.

7. The shafts of the transfer unit are provided in pairs, The nozzle arrangement region is formed by combining two annular regions that surround the extension lines of the pair of shafts. The aforementioned inner cooling section is provided in pairs, The pair of inner cooling units eject coolant from the inside of each of the two annular regions. An apparatus for manufacturing waste plastic molded products according to claim 1 or claim 2.

8. A method for manufacturing waste plastic molded products, This is carried out using the waste plastic molded product manufacturing apparatus described in claim 1 or claim 2. A method for manufacturing waste plastic molded products.

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