Waste plastic molded product manufacturing device, waste plastic molded product manufacturing method, manufacturing device and manufacturing method for extrusion molded product

Abstract

To improve cutting performance in a waste plastic molded product manufacturing device that is equipped with a cutting part.SOLUTION: A waste plastic molded product manufacturing device 100 includes a container 10, a transfer part 20, an extrusion molding part 30 having a plurality of extrusion molding holes 31B, and a cutting part 70 having a cutting mechanism that cuts an extrusion molded product P extruded from the extrusion molding holes 31B. The cutting part 70 includes a plurality of fixed blades 76A provided at outlets of the plurality of extrusion molding holes 31B, a movable blade 71A that constitutes the cutting mechanism together with the plurality of fixed blades 76A, and a drive source 73 that moves the movable blade 71A. At least two of the plurality of fixed blades 76A are formed on a single fixed blade plate 72.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] In order to recycle waste plastics contained in household waste, etc., there is a technology that uses a coke oven to convert the waste plastics into chemical raw materials. In order to feed the waste plastics into the coke oven, the waste plastics need to be molded into a molded product of a predetermined shape. Patent Document 1 discloses an apparatus for manufacturing molded waste plastic products. It has. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-145153 Summary of the Invention [Problem to be solved by the invention]

[0004] The manufacturing apparatus includes a container, a screw provided inside the container, a transfer drive unit that rotates the screw, an extrusion molding unit having a plurality of extrusion holes that communicate with the inside and outside of the container, and a cutting unit having a cutting mechanism that cuts the extrudate extruded from the extrusion holes. The cutting unit has a plurality of fixed blades provided at the outlets of the plurality of extrusion holes, a movable blade that forms a cutting mechanism together with the plurality of fixed blades, and a cutting source that moves the movable blade.

[0005] The present disclosure aims to improve the cutting performance of a manufacturing apparatus for waste plastic molded products that is equipped with a cutting unit. The present disclosure also aims to improve the cutting performance of a manufacturing apparatus for extrusion molded products that is equipped with a cutting unit. [Means for solving the problem]

[0006] The gist of the present disclosure is as follows.

[0007] <1> a container into which waste plastic raw materials are placed; A transfer unit that transfers the waste plastic raw material introduced into the container toward a molding side wall that constitutes a part of the container; an extrusion molding section having a plurality of extrusion molding holes communicating with the inside and outside of the container through the molded side wall; a cutting unit having a cutting mechanism for cutting the extrusion molded product extruded from the extrusion molding hole; Equipped with The cutting portion is a plurality of fixed blades provided at the outlets of the plurality of extrusion molding holes; a movable blade that configures the cutting mechanism together with the fixed blade; a cutting drive unit that moves the movable blade; and At least two of the plurality of fixed blades are formed on one fixed blade plate. Equipment for manufacturing waste plastic moldings. (explanation) This aspect relates to a manufacturing device for molded waste plastic products. The manufacturing device for molded waste plastic products of this aspect includes a container, a transfer unit, an extrusion molding unit having a plurality of extrusion holes, and a cutting unit having a cutting mechanism for cutting the extrusion molded products extruded from the extrusion holes. The cutting unit has a plurality of fixed blades provided at the outlets of the plurality of extrusion holes, a movable blade that forms a cutting mechanism together with the plurality of fixed blades, and a cutting drive unit that moves the movable blade.

[0008] In the manufacturing device disclosed in Patent Document 1, the fixed blades are formed on separate members that are individually placed at the outlets of the multiple extrusion holes. Therefore, it is difficult to manage the positions of the multiple fixed blades so that they are consistent. If it is difficult to manage the positions of the fixed blades, there is a limit to how much the clearance between the fixed blades and the movable blade can be narrowed to improve cutting performance. Therefore, in this aspect, at least two of the plurality of fixed blades are formed on one fixed blade plate. This makes it easy to manage the positions of at least two fixed blades formed on the fixed blade plate, which results in a narrower clearance between the fixed blade and the movable blade and improved cutting performance compared to conventional manufacturing devices.

[0009] In the embodiment described below, all of the multiple fixed blades are formed on one fixed blade plate, but in this aspect, as described above, it is sufficient that at least two of the multiple fixed blades are formed on one fixed blade plate.

[0010] <2> the fixed blade is provided on an edge of a passage hole that penetrates the fixed blade plate and through which the extrusion molded product extruded from the extrusion molding hole passes; <1> The manufacturing apparatus for the waste plastic molded product according to claim 1.

[0011] <3> The passage hole has the same shape as the outlet of the extrusion molding hole. <2> The manufacturing apparatus for the waste plastic molded product according to claim 1.

[0012] <4> The passage hole is circular, The fixed blade is provided around the entire edge of the passage hole. <2> or <3> The manufacturing apparatus for the waste plastic molded product according to claim 1.

[0013] <5> the cutting unit has a slidable member provided at a position where the fixed blade plate and a movable member provided with the movable blade can come into contact with each other; <1> ~ <4> 10. The manufacturing apparatus for the waste plastic molding according to claim 9, (explanation) In the embodiment described below, the slidable member is provided on the movable member. However, the slidable member of this embodiment is not limited to this. For example, the slidable member may be provided on the fixed blade plate, or on both the movable member and the fixed blade plate.

[0014] <6> The plate thickness of the fixed blade plate is 10 mm or more. <1> ~ <5> 10. The manufacturing apparatus for the waste plastic molding according to claim 9,

[0015] <7> <1> ~ <6> The manufacturing apparatus for waste plastic molded products according to any one of the above aspects is used. A manufacturing method for waste plastic moldings.

[0016] <8> an extrusion molding section having a plurality of extrusion molding holes; a cutting unit having a cutting mechanism for cutting the extrusion molded product extruded from the extrusion molding hole; Equipped with The cutting portion is a plurality of fixed blades provided at the outlets of the plurality of extrusion molding holes; a movable blade that configures the cutting mechanism together with the fixed blade; and At least two of the plurality of fixed blades are formed on one fixed blade plate. Extrusion molding manufacturing equipment. (explanation) This aspect relates to an apparatus for manufacturing an extrusion molded product. Note that in this specification, the term "apparatus for manufacturing an extrusion molded product" is not limited to an apparatus for manufacturing a waste plastic molded product described in an embodiment below, but broadly refers to an apparatus for manufacturing a plastic product by extrusion molding.

[0017] <9> <8> The extrusion molding is carried out using the manufacturing apparatus for the extrusion molding described in Method for producing extrudates. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a schematic diagram showing the configuration of a manufacturing apparatus for waste plastic molded products according to an embodiment. [Figure 2] 3A and 3B are diagrams illustrating an extrusion molding section and a nozzle cooling section according to an embodiment. [Figure 3] FIG. 2 is a diagram showing a cutting section according to an embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail. Note that components having substantially the same functions are designated by the same reference numerals, and redundant description will be omitted.

[0020] <Waste plastic molding manufacturing equipment> First, a manufacturing apparatus 100 for manufacturing a waste plastic molded product P (hereinafter simply referred to as the manufacturing apparatus 100) according to an embodiment of the present invention will be described.

[0021] FIG. 1 is a schematic diagram showing the overall configuration of a manufacturing apparatus 100. As shown in FIG.

[0022] The manufacturing apparatus 100 is an apparatus for manufacturing a waste plastic molded product P (hereinafter simply referred to as molded product P) having a predetermined shape by subjecting a waste plastic raw material M (hereinafter simply referred to as raw material M) to processes such as crushing, kneading, and heating, and then extruding the same. The molded product P is, for example, inserted into a coke oven together with coal and recycled as a chemical raw material.

[0023] The raw material M includes plastic waste such as used plastic containers. Specifically, the raw material M includes plastic waste whose main components are resin materials such as polyethylene, polystyrene, and polypropylene.

[0024] The raw material M may be in a state in which it has been crushed to some extent before being introduced into the manufacturing apparatus 100 for the molded product P. Furthermore, the raw material M may be in a state in which it has been kneaded and heated to some extent before being introduced into the manufacturing apparatus 100 for the molded product P. In this case, the kneading and heating of the raw material M in the container 10 may be omitted or may be performed simply.

[0025] The manufacturing apparatus 100 includes a container 10, a transfer section 20, an extrusion molding section 30, and a cutting section . First, raw material M is introduced into container 10 via hopper 13. The introduced raw material M is transferred from one end 11 to the other end 15 of container 10 by transfer section 20 while being kneaded and heated. Then, raw material M is extruded into a predetermined shape via extrusion molding section 30, and the surface of raw material M is solidified by cooling in extrusion molding section 30. Thereafter, raw material M is cut by cutting section 70, and finally, a molded product P is formed.

[0026] (container) The container 10 is a housing portion capable of containing the raw material M. The container 10 has a hopper 13 that opens toward the Z direction at one end 11 side in the Y direction in FIG. 1 . The raw material M is introduced into the container 10 through 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 about 140°C or higher inside the container 10, for example.

[0027] If the heating temperature inside the container 10 is less than about 140°C, the raw material M will not melt sufficiently, and the surface side will not be solidified sufficiently during the molding process of the molded product P. In other words, by setting the temperature inside the container 10 to about 140°C or higher, the molded product P can be solidified sufficiently during the molding process.

[0028] When raw material M is heated to approximately 140°C or higher in container 10, this does not mean that all areas in container 10 are heated to 140°C or higher; it is sufficient that raw material M near extrusion molding section 30 in container 10 is heated to 140°C or higher.

[0029] A part 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 of the container 10 in the Y direction. A face plate 17 is provided at the other end 15 of the container 10. The face plate 17 is a plate-like member provided at the other end 15 of the container 10, and an extrusion molding section 30 is provided on the face plate 17. The thickness, shape, etc. of the face plate 17 can be set appropriately taking into consideration the pressing force, etc. in the extrusion molding. The face plate 17 constitutes the molding side wall 16 located at the other end 15 of the container 10.

[0030] The container 10 is also provided with a container cooling section 40. Specifically, as shown in Fig. 1, a flow path 41 is formed inside the outer peripheral wall 19 of the container 10. When a refrigerant C flows through the flow path 41, the raw material M in the container 10 is extracted from the heat and cooled.

[0031] (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 arranged along the Y direction, a speed reduction mechanism 23 connected to the axial end of the shaft 21, and a drive source 25 that applies a rotational force to the shaft 21 via the speed reduction mechanism 23. Note that the pair of shafts 21 are arranged side by side in the X direction, and therefore only one of the shafts 21 is shown in FIG. 1. The rotation directions of the pair of shafts 21 may be the same direction or opposite directions, and are set appropriately depending on the kneading and heating state of the raw material M in the container 10, etc.

[0032] A screw 27 having a spirally formed blade portion is provided on the outer circumferential surface of the pair of shafts 21. With the rotation of the shafts 21, the screw 27 transfers the raw material M from one end 11 side to the other end 15 side of the container 10. Furthermore, with the rotation of the screws 27 provided on the pair of shafts 21, the raw material M is kneaded and heated by friction.

[0033] Furthermore, a kneading disc unit (not shown) may be provided on the pair of shafts 21. The kneading disc unit is provided at the axial middle of the shaft 21. By the rotation of the kneading disc units provided on the pair of shafts 21, the raw material M is further kneaded and heated by friction.

[0034] (Extrusion molding section) The extrusion molding section 30 is a section that connects the inside and outside of the container 10 via the molding side wall 16, and is a section that molds the molded product P.

[0035] Specifically, the extrusion molding unit 30 includes a plurality of molding nozzles 31. The molding nozzles 31 are tubular (specifically, cylindrical). A plurality of through-holes are formed in the face plate 17, penetrating the face plate 17, and the plurality of molding nozzles 31 are arranged in a state of being inserted into the plurality of nozzle arrangement holes.

[0036] More specifically, the base end portion of the molding nozzle 31 is disposed inside the through-hole of the face plate 17, and the tip end portion protrudes from the outer surface 17A of the face plate 17. Because the tip end portion of the molding nozzle 31 protrudes from the outer surface 17A of the face plate 17, the time during which the raw material M contacts the inner circumferential surface 31B of the extrusion molding section 30 is increased. This allows the molten surface of the raw material M to be sufficiently solidified. Hereinafter, the inner circumferential surface 31B of the extrusion molding section 30 may be referred to as the extrusion molding hole 31B.

[0037] FIG. 2 is a view of the extrusion molded portion 30 as viewed from the direction opposite to the face plate 17 (+Y direction). As shown in Fig. 2, the multiple molding nozzles 31 (18 in Fig. 2) that make up the extrusion molding section 30 are arranged in a region R (hereinafter referred to as the nozzle arrangement region R) that surrounds an extension of the shaft 21. Specifically, since a pair of shafts 21 is provided, there is an annular region r that surrounds an extension of one shaft 21, and an annular region r that surrounds an extension of the other shaft 21. The two annular regions r partially overlap. As a result, the nozzle arrangement region R is in the shape of a figure eight.

[0038] 2, the molding nozzles 31 are arranged in a single ring shape in the ring region r, but the molding nozzles 31 may be arranged in a double or triple ring shape. 2, molding nozzles 31 are arranged corresponding to all of the through holes formed in the face plate 17. However, depending on the number of molding nozzles 31 required, some of the through holes may be blocked by inserting blocking members instead of the molding nozzles 31.

[0039] (cutting part) The cutting section 70 cuts the raw material M (extrusion product) extruded from the extrusion holes 31B in the extrusion molding section 30. The outer peripheral surface of the raw material M extruded in the extrusion molding section 30 is solidified, and the outer shape of the raw material M is maintained, making cutting easy. By providing the cutting section 70, the cutting location can be controlled compared to when the raw material M breaks under its own weight.

[0040] The specific configuration of the cutting unit 70 of this embodiment will be described with reference to Figures 3 and 4. Note that Figure 1 is a simplified illustration, and the characteristic configuration of the cutting unit 70 of this embodiment is not shown in Figure 1.

[0041] As shown in Fig. 3, the cutting unit 70 has a fixed blade plate 72 in which a plurality of through holes 76 are formed, a pair of rotating members 71 in which movable blades 71A are formed, and a pair of cutting unit shafts 75. The pair of rotating members 71 are connected to a drive source 73 (Fig. 1) via the respective cutting unit shafts 75. Note that hereinafter, the rotating members 71 may also be referred to as movable members 71.

[0042] As shown in FIG. 4, the fixed blade plate 72 is disposed on the +Y direction side of the face plate 17 with its thickness direction facing the Y direction. The multiple through holes 76 formed in the fixed blade plate 72 are holes that penetrate the fixed blade plate 72 and are provided at positions corresponding to the outlets of the multiple extrusion holes 31B. As a result, the extrusion molded product extruded from the extrusion holes 31B passes through the through holes 76. The through holes 76 are circular in shape. The entire periphery of the edge of the through hole 76 serves as a fixed blade 76A. Specifically, as shown in FIG. 4, the through hole 76 has a cross-sectional shape that gradually becomes smaller from the -Y direction side to the +Y direction side. The edge of the through hole 76 at the end on the +Y direction side functions as the fixed blade 76A.

[0043] One of the pair of rotating members 71 is configured to be rotatable around the center of one of the annular regions r (see FIG. 2), and the other of the pair of rotating members 71 is configured to be rotatable around the center of the other annular region r. Because the pair of rotating members 71 have the same structure, they will be collectively referred to as rotating members 71 below.

[0044] The rotating member 71 has a shape that extends linearly. The center of the rotating member 71 is supported by the cutting unit shaft 75 and serves as the center of rotation. The movable blade 71A is configured so that it can cut the extrusion molded material regardless of the direction in which the rotating member 71 rotates. In other words, the movable blades 71A are formed on both sides of the rotating member 71 in the rotation direction.

[0045] The rotating member 71 is positioned on the +Y direction side of the fixed blade plate 72 and is configured to rotate at a position close to the fixed blade plate 72. This allows the fixed blade 76A and the movable blade 71A to cooperate to cut the extrusion molded product extruded from the extrusion molding section 30. In this embodiment, the set value for the clearance between the fixed blade 76A and the movable blade 71A is 6 mm or less (more preferably 4 mm or less).

[0046] The rotating member 71 may deform and vibrate while rotating. For this reason, the position of the rotating member 71 in the Y direction may be unstable, particularly in a portion of the rotating member 71 that is far from the portion supported by the cutting section shaft 75 (for example, the portion that functions as the movable blade 71A). However, as described above, the rotating member 71 is configured to rotate in a position close to the fixed blade plate 72, and therefore, contact between the rotating member 71 and the fixed blade plate 72 can prevent the deformation and vibration from becoming excessively large.

[0047] As shown in Fig. 4, a sliding member 78 is embedded in the surface of the rotating member 71 facing the fixed blade plate 72. The sliding member 78 is, for example, PEEK (Poly Ether Ether Ketone). PEEK is a material that is heat resistant and has excellent sliding properties. However, the sliding member 78 is not limited to this, and may be any member that is heat resistant and has better sliding properties than the material (for example, steel) that constitutes the rotating member 71. The sliding member 78 is, for example, a super engineering plastic.

[0048] As described above, the rotating member 71 may deform and vibrate while rotating, which may result in contact with the fixed blade plate 72. Therefore, the above-described slidable member 78 is provided, so that even if contact does occur, the part with good slidability can be made to come into contact.

[0049] In the above, an example has been described in which the slidable member 78 is provided on the rotating member 71 side, but the slidable member 78 may be provided on the fixed blade plate 72 side or on both sides. In other words, it is sufficient that the slidable member 78 is provided in a position where the fixed blade plate 72 and the rotating member 71 can come into contact with each other.

[0050] 4, the angle of the fixed blade 76A is 45 degrees. However, the angle of the fixed blade 76A is not limited to this and may be, for example, 90 degrees. In consideration of cutting performance, the angle of the fixed blade 76A is preferably 60 degrees or less.

[0051] 4, the angle of movable blade 71A is 45 degrees. However, the angle of fixed blade 76A is not limited to this and may be, for example, 90 degrees. In consideration of cutting performance, the angle of movable blade 71A is preferably 60 degrees or less.

[0052] (Container cooling section) The manufacturing apparatus 100 also includes a container cooling unit 40 . The container cooling section 40 removes heat from the raw material M in the container 10 by circulating a refrigerant C through a flow path 41 provided in the container 10. As a result, the raw material M in the container 10 is cooled.

[0053] 1, a flow path 41 is formed in the outer peripheral wall 19 of the container 10. The flow path 41 is, for example, tubular and circular in cross section. The flow path 41 is formed in a spiral shape in the container 10. That is, the flow path 41 is formed in a circular shape along the in-plane direction of the outer peripheral wall 19 of the container 10, with a predetermined pitch along the direction in which the raw material M is transferred (direction Y).

[0054] A coolant C is introduced into or discharged from the flow path 41 via one end 41A and the other end 41B of the flow path 41.

[0055] As shown in FIG. 1, the container cooling unit 40 may include a circulation mechanism 43. The circulation mechanism 43 circulates the refrigerant C, repeatedly introducing and discharging the refrigerant C into and from a flow path 41 inside the container 10. Specifically, as shown in FIG. 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 higher and 80°C or lower. A known cooling method for a circulating refrigerant may be appropriately adopted for the cooling technique used in the chiller 43A. The pump 43B circulates the refrigerant C at a predetermined pressure. A known pressure-transfer method may be appropriately adopted for the pump 43B depending on the type of refrigerant C and the required pressure.

[0056] (heating part) The manufacturing apparatus 100 also has a heating unit 50 that can adjust the temperature of the face plate 17 . The heating section 50 is, for example, a resistance heating type heater 51 provided inside the face plate 17. The heater 51 is connected to a heating power source 53, and heats the face plate 17 and its vicinity by generating heat inside the face plate 17. Heating by the heating section 50 provided on the face plate 17 at the other end 15 of the container 10 suppresses a decrease in the temperature of the raw material M. In other words, the raw material M is maintained in a molten state inside the extrusion molding section 30.

[0057] (Nozzle cooling section) The manufacturing apparatus 100 also includes a nozzle cooling section 60 . The nozzle cooling unit 60 cools the forming nozzle 31 by spraying a cooling liquid W (cooling water) toward the outer peripheral surface 31A of the forming nozzle 31. Cooling the forming nozzle 31 promotes solidification of the molten surface of the raw material M. This suppresses expansion of the formed object P after forming, and realizes high density of the formed object P. Furthermore, since the formed object P has a predetermined rigidity, it becomes easy to cut by the cutting unit 70, which will be described later.

[0058] In the cooling by the nozzle cooling section 60, for example, the forming nozzle 31 is cooled to approximately 100°C or less. If the temperature of the forming nozzle 31 is higher than approximately 100°C even after cooling by the nozzle cooling section 60, the surface of the molten raw material M is not solidified sufficiently. As a result, the formed product P cannot be densified.

[0059] As shown in FIG. 1, the nozzle cooling section 60 has a jetting outlet 61 from which the cooling liquid W is jetted, and a pump 63 that supplies the cooling liquid W to the jetting outlet 61.

[0060] As shown in FIG. 2, the nozzle cooling section 60 has a plurality of jet ports 61A, 61B, 61C, 61D, and 61E. The nozzle cooling section 60 has an outer cooling section 60A that sprays the cooling liquid W from outside the nozzle arrangement region R, and an inner cooling section 60B that sprays the cooling liquid W from inside the nozzle arrangement region R. The multiple nozzles 61A, 61B, 61C, 61D, and 61E can be divided into nozzles 61A and 61B that are located outside the nozzle arrangement region R and function as the outer cooling section 60A, and nozzles 61C, 61D, and 61E that are located inside the nozzle arrangement region R and function as the inner cooling section 60B. By providing the inner cooling section 60B in addition to the outer cooling section 60A, it is possible to effectively cool the forming nozzle 31 that is difficult to cool with the outer cooling section 60A and parts of the forming nozzle 31 that are difficult to cool with the outer cooling section 60A (for example, the underside of the forming nozzle located at the top of the annular region r).

[0061] (Temperature sensor) The manufacturing apparatus 100 also has a temperature sensor 31C for measuring the temperature of the molding nozzle 31. The temperature sensor 31C may be provided at a position where it can measure the temperature of a radially intermediate portion of the wall thickness of the extrusion molded portion 30. The temperature sensor 31C is, for example, a thermocouple. The manufacturing apparatus 100 also includes a temperature sensor 17C capable of detecting the temperature of the face plate 17. As an example, the temperature sensor 17C is a thermocouple that is used while being inserted into the face plate 17. The temperature sensor 17C is provided within a range in which the heating temperature of the heater 51 provided in the face plate 17 can be detected.

[0062] (Control unit) The manufacturing apparatus 100 includes a control unit 90. The control unit 90 controls the molding process of the molded product P in the manufacturing apparatus 100.

[0063] Specifically, the control unit 90 controls the heating of the periphery of the face plate 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. That is, 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 of the cutting unit 70 and the drive source 25 of the transfer unit 20, etc.

[0064] Furthermore, in the cooling by the container cooling unit 40, the control unit 90 controls at least one of the flow rate and the 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 becomes equal to or lower than a predetermined temperature (for example, equal to or lower than 100°C).

[0065] The function of the control unit 90 is realized, for example, by cooperation of a CPU (Central Processing Unit), memory, storage, etc. That is, the CPU functions as the control unit 90 by executing, on the memory, a control program for the manufacturing apparatus 100 stored in the storage.

[0066] <Method of manufacturing waste plastic molded products> Next, a method for producing the waste plastic molded product P according to this embodiment will be described.

[0067] First, the waste plastic raw material M is charged into the container 10. Then, the waste plastic raw material M is kneaded in the container 10 and heated.

[0068] Furthermore, the waste plastic raw material M heated to 150°C or higher is transferred toward the extrusion molding section 30, which is provided at the end of the container 10 and connects the inside of the container 10 to the outside. The waste plastic raw material M is transferred to the end of the container 10, and is extruded inside 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 inside the extrusion molding section 30. Finally, the waste plastic raw material M is extruded from the extrusion molding section 30, and is cut by the cutting section 70, and a waste plastic molded product P is formed.

[0069] <Action and effect> Next, the effects of this embodiment will be described.

[0070] As shown in Fig. 1, the waste plastic molded product manufacturing apparatus 100 of this embodiment includes a container 10, a transfer section 20, an extrusion molding section 30 having a plurality of extrusion molding holes 31B, and a cutting section 70 having a cutting mechanism that cuts the extrusion molded product extruded from the extrusion molding holes 31B. As shown in Fig. 3, the cutting section 70 has a plurality of fixed blades 76A provided at the outlets of the plurality of extrusion molding holes 31B, and a movable blade 71A that, together with the plurality of fixed blades 76A, constitutes the cutting mechanism 71A, 76A.

[0071] In the manufacturing device disclosed in Patent Document 1, the fixed blades are provided as individual components individually arranged for each waste plastic outlet. Therefore, it is difficult to manage the positions of the multiple fixed blades so that they are not distorted. If it is difficult to manage the positions of the fixed blades, there is a limit to how much the clearance between the fixed blades and the movable blade can be narrowed to improve cutting performance. Therefore, in this embodiment, as shown in FIGS. 3 and 4, at least two of the plurality of fixed blades 76A (all of the fixed blades 76A in the figures) are formed on one fixed blade plate 72. This makes it easy to manage the positions of the multiple fixed blades 76A. As a result, the clearance between the fixed blades 76A and the movable blade 71A can be narrowed to improve cutting performance. The set value for the clearance between the fixed blades 76A and the movable blade 71A is, for example, 6 mm or less (more preferably 4 mm or less).

[0072] In addition, in this embodiment, as shown in Figures 3 and 4, the fixed blade 76A is provided on the edge of the passage hole 76, which is a hole that penetrates the fixed blade plate 72 and through which the extrusion molded material extruded from the extrusion molding hole 31B passes. Therefore, compared to a mode in which the fixed blade 76A is provided on the edge of a notch that is open in the plate surface direction of the fixed blade plate 72, for example, the fixed blade plate 72 can be made less likely to deform.

[0073] However, if the fixed blade plate 72 comes into contact with the movable member 71 provided with the movable blade 71A, there is a risk that the movable blade 71A may wear out or the load on the cutting drive unit 73 may increase, causing a breakdown. 4, in this embodiment, a sliding member 78 is embedded in the surface of the movable member 71 facing the fixed blade plate 72. In other words, the cutting unit 70 has the sliding member 78 provided at a position where the fixed blade plate 72 and the movable member 71 provided with the movable blade 71A can come into contact with each other. Therefore, even if the fixed blade plate 72 and the movable member 71 come into contact with each other, the contact will occur at a portion with good sliding properties. As a result, adverse effects caused by contact between the fixed blade plate 72 and the movable member 71 can be suppressed.

[0074] In this embodiment, the plate thickness of the fixed blade plate 72 is 10 mm or more. This suppresses deformation or vibration of the fixed blade plate 72. Suppressing deformation or the like of the fixed blade plate 72 improves the positional accuracy of the fixed blade 76A, so that the clearance between the fixed blade 76A and the movable blade 71A can be set small.

[0075] Although the preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments.

[0076] The material of the fixed blade plate is, for example, metal (for example, steel), but may be other than metal.

[0077] In the above embodiment, the passage hole 76 has the same shape as the outlet of the extrusion molding hole 31B, but it may have a different shape. Note that the "same shape" here includes the case where the sizes are different.

[0078] In the above embodiment, the shape of the through hole 76 is circular, but it does not have to be circular.

[0079] In the above embodiment, the entire periphery of the edge of the passage hole 76 is the fixed blade 76A, but only a part of the edge of the passage hole 76 may be the fixed blade 76A.

[0080] In the above embodiment, as shown in FIG. 4, the tip of the molding nozzle 31 is located inside the passage hole 76, but it may also be located outside the passage hole 76.

[0081] In the above embodiment, the cutting unit 70 has a pair of rotating members 71 (movable members 71), but the cutting unit 70 may have only one movable member.

[0082] In the above embodiment, the movable member 71 on which the movable blade 71A is formed is a rotating member 71, but the movable member does not have to be a rotating member.

[0083] In the above embodiment, the cutting portion 70 has the slidable member 78, but the cutting portion does not necessarily have to have a slidable member. [Explanation of symbols]

[0084] 10 containers 16 Molded side wall 20 Transfer section 30 Extrusion molding section 31 Molding nozzle 31B Inner surface (extrusion molding hole) 70 Cutting section 71A,76A cutting mechanism 71 Rotating parts (movable parts) 71A Movable blade 72 Fixed blade plate 73 Power Source 75 Cutting shaft 76 Passing hole 76A fixed blade 78 Sliding members 100 Manufacturing equipment M Waste plastic raw materials P Waste plastic moldings

Claims

1. a container into which waste plastic raw materials are placed; A transfer unit that transfers the waste plastic raw material introduced into the container toward a molding side wall that constitutes a part of the container; an extrusion molding section having a plurality of extrusion molding holes communicating with the inside and outside of the container through the molded side wall; a cutting unit having a cutting mechanism for cutting the extrusion molded product extruded from the extrusion molding hole; Equipped with The cutting portion is a plurality of fixed blades provided at the outlets of the plurality of extrusion molding holes; a movable blade that configures the cutting mechanism together with the fixed blade; a drive source that moves the movable blade; and At least two of the plurality of fixed blades are formed on one fixed blade plate. Equipment for manufacturing waste plastic moldings.

2. the fixed blade is provided on an edge of a passage hole that penetrates the fixed blade plate and through which the extrusion molded product extruded from the extrusion molding hole passes; 2. The apparatus for producing molded waste plastic products according to claim 1.

3. The passage hole has the same shape as the outlet of the extrusion molding hole. The apparatus for producing molded waste plastic products according to claim 2.

4. The passage hole is circular, The fixed blade is provided around the entire edge of the passage hole.

4. The apparatus for producing molded waste plastic products according to claim 2 or 3.

5. the cutting unit has a slidable member provided at a position where the fixed blade plate and a movable member provided with the movable blade can come into contact with each other; 2. The apparatus for producing molded waste plastic products according to claim 1.

6. The plate thickness of the fixed blade plate is 10 mm or more.

2. The apparatus for producing molded waste plastic products according to claim 1.

7. The method is carried out using the waste plastic molding manufacturing apparatus according to claim 1 or 2. A manufacturing method for waste plastic moldings.

8. an extrusion molding section having a plurality of extrusion molding holes; a cutting unit having a cutting mechanism for cutting the extrusion molded product extruded from the extrusion molding hole; Equipped with The cutting portion is a plurality of fixed blades provided at the outlets of the plurality of extrusion molding holes; a movable blade that configures the cutting mechanism together with the fixed blade; and At least two of the plurality of fixed blades are formed on one fixed blade plate. Extrusion molding manufacturing equipment.

9. The extrusion molding method according to claim 8 is carried out using the extrusion molding manufacturing apparatus. Method for producing extrudates.

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