Extrusion method of environment-friendly recycled wire and cable flame-retardant plastic

Abstract

The invention discloses an extrusion method of environment-friendly recycled wire and cable flame-retardant plastic, and belongs to the technical field of plastic extrusion. A green recycling type wire and cable flame-retardant plastic extrusion method comprises the following steps that S1, extruder equipment is debugged, and heating temperatures and pressure values corresponding to different plastic particles are debugged; s2, setting the heating temperature of each section of extruder equipment; s3, the plastic particle raw materials are placed in a feeding hopper of extruder equipment, and the plastic particle raw materials are crushed and then mixed; s4, carrying out melt extrusion on the crushed and mixed plastic raw materials by using extruder equipment; plastic raw materials can be crushed and mixed during feeding, the plastic melting rate and the plastic extrusion effect can be improved conveniently, and the plastic production quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic extrusion, and particularly to a method for extruding flame-retardant plastics for green recycled wire and cable. Background Art

[0002] When recycling wire and cable, the flame-retardant plastic sheath is separated from the wire core, and the wire core and the flame-retardant plastic sheath are recycled separately. The flame-retardant plastic sheath is remade into plastic particles and processed by an extruder. The extruder is one type of plastic machinery, originating in the 18th century. According to the direction of the material flow at the die head and the angle between the screw center line, the die head can be divided into a right-angle die head and an oblique-angle die head, etc. The screw extruder relies on the pressure and shear force generated by the rotation of the screw, enabling the material to be fully plasticized and evenly mixed, and formed through the die.

[0003] Existing plastic extruders generally use plastic particles for melt extrusion. However, during specific operation, the temperature required to melt larger plastic particles is relatively high, resulting in high energy consumption of the equipment. Moreover, if the plastic particles are not completely melted, it is likely to affect the plastic extrusion effect and the quality of plastic production. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a method for extruding flame-retardant plastics for green recycled wire and cable.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A method for extruding flame-retardant plastics for green recycled wire and cable, comprising the following steps:

[0007] S1. Debug the extruder equipment to obtain the heating temperature and pressure values corresponding to different plastic particles;

[0008] S2. Set the heating temperature of each section of the extruder equipment;

[0009] S3. Place the plastic particle raw material in the feed hopper of the extruder equipment, crush and mix the plastic particle raw material;

[0010] S4. Make the extruder equipment melt and extrude the crushed and mixed plastic raw material.

[0011] Preferably, the extruder equipment includes a base and a barrel disposed on top of the base. An extrusion screw is rotatably disposed within the barrel. The feed hopper is fixedly provided on top of the barrel and is in communication with the barrel. A mounting plate is fixedly provided on top of the base, and a driving motor is fixedly provided on the mounting plate. The output shaft of the driving motor is connected to a driving shaft for driving the extrusion screw to rotate. A material crushing assembly for crushing raw materials and a material mixing assembly for mixing raw materials are provided within the feed hopper. A transmission assembly is provided between the material mixing assembly and the driving shaft.

[0012] Preferably, the feed hopper includes a feeding pipe in communication with the barrel, a mixing shell fixedly provided on top of the feeding pipe, and a crushing shell fixedly provided on top of the mixing shell. The material crushing assembly is disposed within the crushing shell, and the material mixing assembly is disposed within the mixing shell.

[0013] Preferably, the material mixing assembly includes a rotating member rotatably connected within the mixing shell and mixing plates provided on the rotating member. The transmission assembly includes synchronous pulleys provided on the rotating member and the driving shaft, and a synchronous belt is provided between the two synchronous pulleys.

[0014] Preferably, the rotating member includes a rotating rod connected to the synchronous pulley and a sleeve slidably connected to the outside of the rotating rod. The mixing plates are fixedly provided on the sleeve. A top rod is fixedly provided on the rotating rod. A stress block is rotatably connected to the sleeve. An extrusion inclined surface that is movably abutted against the top rod is provided on the stress block. An elastic telescopic rod is provided between the stress block and the outer wall of the mixing shell.

[0015] Preferably, the material crushing assembly includes a support plate fixedly provided at the bottom of the crushing shell, an upper rotating rod rotatably connected to the support plate, and a plurality of crushing blades provided on the upper rotating rod.

[0016] Preferably, a reciprocating lead screw is provided on the outside of the upper rotating rod. A sleeve is threadedly connected to the reciprocating lead screw. A limiting telescopic rod is provided between the sleeve and the support plate. A filter screen tube that is slidably connected within the crushing shell is fixedly provided on the outside of the sleeve.

[0017] Preferably, a working shell is fixedly provided within the mixing shell through a support plate. A main bevel gear is rotatably connected within the working shell. An upper bevel gear that meshes with the main bevel gear is provided on the upper rotating rod. The upper bevel gear is slidably connected to the sleeve.

[0018] Preferably, a guiding strip is fixedly provided on the sleeve. Guiding grooves for the guiding strip to slide are provided on the upper bevel gear and the rotating rod.

[0019] Preferably, a lower rotating rod that is rotatably connected within the feeding pipe is provided at the bottom of the working shell. A lower bevel gear that meshes with the main bevel gear is provided at the top of the lower rotating rod. Spiral conveying blades are provided on the lower rotating rod.

[0020] Compared with the prior art, the present invention provides a method for extruding a flame-retardant plastic for green recycling of wire and cable, having the following beneficial effects:

[0021] 1. In this method for extruding a flame-retardant plastic for green recycling of wire and cable, when the plastic particle raw materials are fed, a crushing component is used to crush them, which is convenient for improving the plastic melting rate and the plastic extrusion effect, and ensuring the plastic production quality.

[0022] 2. In this method for extruding a flame-retardant plastic for green recycling of wire and cable, by using a mixing component to mix the crushed raw materials, the plastic raw materials fed at different times before and after are evenly mixed, ensuring that the quality of the plastic extrusion is consistent before and after, and further improving the plastic production quality.

[0023] 3. In this method for extruding a flame-retardant plastic for green recycling of wire and cable, by arranging a spiral conveying blade in the feeding pipe to convey the raw materials, it is avoided that the plastic at the bottom of the feeding hopper melts and blocks the bottom of the feeding hopper due to the too high temperature in the barrel, ensuring the orderly feeding of the plastic raw materials, avoiding the interruption of plastic extrusion, and ensuring the plastic production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the extruder equipment of the present invention;

[0025] Figure 2 is of the present invention Figure 1 schematic diagram of the partial enlarged structure of part A therein

[0026] Figure 3 is a schematic diagram of the sectional structure of the feeding hopper of the present invention;

[0027] Figure 4 is of the present invention Figure 3 schematic diagram of the partial enlarged structure of part B therein;

[0028] Figure 5 is a schematic diagram of the external structure of the upper rotating rod of the present invention;

[0029] Figure 6 is a schematic diagram of the structure of the rotating part of the present invention;

[0030] Figure 7 is of the present invention Figure 6 schematic diagram of the partial enlarged structure of part C therein.

[0031] In the figure: 1, base; 2, barrel; 3, mounting plate; 301, drive motor; 302, drive shaft; 4, feed hopper; 401, blanking pipe; 402, mixing shell; 403, crushing shell; 5, rotating member; 501, rotating rod; 5011, ejector rod; 502, sleeve; 5021, force-receiving block; 5022, guiding strip; 503, elastic telescopic rod; 6, mixing plate; 7, synchronous pulley; 8, support plate; 801, upper rotating rod; 802, crushing blade; 803, upper bevel gear; 9, reciprocating lead screw; 901, sleeve; 902, filter screen cylinder; 10, working shell; 1001, main bevel gear; 11, lower rotating rod; 111, lower bevel gear; 112, spiral conveying blade; 12, guiding groove. Detailed implementation manner

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements; for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] Example: Refer to Figures 1-7 , a method for extruding a flame-retardant plastic for green recycling of wire and cable, comprising the following steps:

[0036] S1. Debug the extruder equipment to debug the heating temperature and pressure values corresponding to different plastic particles;

[0037] S2. Set the heating temperatures of each section of the extruder equipment;

[0038] S3. Place the plastic granule raw materials into the feed hopper 4 of the extruder equipment, crush and mix the plastic granule raw materials;

[0039] S4. Make the extruder equipment melt and extrude the crushed and mixed plastic raw materials.

[0040] Refer to Figure 1 and Figure 3 , as a preferred technical solution of the present invention, the extruder equipment includes a base 1 and a barrel 2 arranged on the top of the base 1. An extrusion screw is rotatably arranged in the barrel 2. The feed hopper 4 is fixedly arranged on the top of the barrel 2 and is in communication with the barrel 2. An installation plate 3 is fixedly arranged on the top of the base 1. A driving motor 301 is fixedly arranged on the installation plate 3. The output shaft of the driving motor 301 is connected with a driving shaft 302 for driving the extrusion screw to rotate. A crushing component for crushing the raw materials and a mixing component for mixing the raw materials are arranged in the feed hopper 4. A transmission component is arranged between the mixing component and the driving shaft 302.

[0041] Specifically, when the extruder equipment works, control the driving motor 301 to operate. The driving shaft 302 of the driving motor 301 drives the extrusion screw in the barrel 2 to operate, so that the extrusion screw extrudes the molten raw materials in the barrel 2. When the driving shaft 302 rotates, it drives the mixing component and the crushing component to work through the transmission component. When the plastic granule raw materials are fed, the crushing component is used to crush them, which is convenient for improving the plastic melting rate and the plastic extrusion effect, ensuring the plastic production quality. The mixing component is used to mix the crushed raw materials, so that the plastic raw materials fed at different times are evenly mixed, ensuring that the quality of the plastic extrusion is consistent before and after, and further improving the plastic production quality.

[0042] Refer to Figure 1 , Figure 2 and Figure 3 , as a preferred technical solution of the present invention, further, the feed hopper 4 includes a feeding pipe 401 in communication with the barrel 2, a mixing shell 402 fixedly arranged on the top of the feeding pipe 401, and a crushing shell 403 fixedly arranged on the top of the mixing shell 402. The crushing component is arranged in the crushing shell 403, and the mixing component is arranged in the mixing shell 402.

[0043] Further, the mixing component includes a rotating member 5 rotatably connected in the mixing shell 402 and mixing plates 6 arranged on the rotating member 5. The transmission component includes synchronous wheels 7 arranged on the rotating member 5 and the driving shaft 302, and a synchronous belt is arranged between the two synchronous wheels 7.

[0044] Specifically, when the drive shaft 302 rotates, it drives the rotating member 5 to rotate through the synchronous pulley 7 and the synchronous belt. When the rotating member 5 rotates, it drives the mixing plate 6 to flip within the mixing housing 402, mixing the crushed raw materials, making the plastic raw materials that fall at different times before and after evenly mixed, ensuring the consistency of the quality of plastic extrusion before and after, and further improving the quality of plastic production.

[0045] Referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 6 As a preferred technical solution of the present invention, further, the rotating member 5 includes a rotating rod 501 connected to the synchronous pulley 7 and a sleeve 502 slidably connected to the outside of the rotating rod 501. The mixing plate 6 is fixedly arranged on the sleeve 502. A top rod 5011 is fixedly arranged on the rotating rod 501. A force-receiving block 5021 is rotatably connected to the sleeve 502. An extrusion inclined surface that is movably abutted against the top rod 5011 is formed on the force-receiving block 5021. An elastic telescopic rod 503 is arranged between the force-receiving block 5021 and the outer wall of the mixing housing 402.

[0046] Specifically, when the rotating rod 501 of the rotating member 5 rotates, it drives the sleeve 502 to rotate. The top rod 5011 on the rotating rod 501 abuts against the extrusion inclined surface of the force-receiving block 5021, causing the force-receiving block 5021 to drive the sleeve 502 to slide relative to the rotating rod 501. The sleeve 502 drives the mixing plate 6 to move, adjusting the flipping range of the mixing plate 6, thereby improving the mixing effect of the plastic raw materials. The elastic telescopic rod 503 freely expands and contracts as the force-receiving block 5021 moves.

[0047] Referring to Figures 1-7 As a preferred technical solution of the present invention, further, the crushing assembly includes a support plate 8 fixedly arranged at the bottom of the crushing housing 403, an upper rotating rod 801 rotatably connected to the support plate 8, and a plurality of crushing blades 802 arranged on the upper rotating rod 801.

[0048] Further, a reciprocating lead screw 9 is arranged on the outside of the upper rotating rod 801. A sleeve 901 is threadedly connected to the reciprocating lead screw 9. A limiting telescopic rod is arranged between the sleeve 901 and the support plate 8. A filter screen cylinder 902 that is slidably connected within the crushing housing 403 is fixedly arranged on the outside of the sleeve 901.

[0049] Further, a working housing 10 is fixedly arranged within the mixing housing 402 through a support plate. A main bevel gear 1001 is rotatably connected within the working housing 10. An upper bevel gear 803 that meshes with the main bevel gear 1001 is arranged on the upper rotating rod 801. The upper bevel gear 803 is slidably connected to the sleeve 502.

[0050] Further, a guiding strip 5022 is fixedly arranged on the sleeve 502. Guiding grooves 12 for the guiding strip 5022 to slide are formed on the upper bevel gear 803 and the rotating rod 501.

[0051] Specifically, when the sleeve 502 rotates, it drives the main bevel gear 1001 to rotate through the guide bar 5022. When the main bevel gear 1001 rotates, it meshes with the upper bevel gear 803 at the bottom of the upper rotating rod 801 for transmission. The upper rotating rod 801 drives the reciprocating lead screw 9 to rotate, and the sleeve 901 reciprocates up and down along the axial direction of the reciprocating lead screw 9. When the sleeve 901 drives the filter screen cylinder 902 to move up and down, the plastic raw materials in the filter screen cylinder 902 are shaken up and down. The crushing blade 802 on the upper rotating rod 801 crushes and cuts the plastic raw materials that are shaken up and down. The plastics that meet the crushing requirements pass through the filter screen cylinder 902 and enter the mixing shell 402. The up-and-down shaking of the filter screen cylinder 902 can, on the one hand, ensure that the plastics that meet the crushing requirements fall quickly, and on the other hand, enable the crushing blade 802 to fully crush the plastic raw materials.

[0052] Referring to Figure 1 and Figure 3 As a preferred technical solution of the present invention, further, a lower rotating rod 11 rotatably connected in the feeding pipe 401 is provided at the bottom of the working shell 10. A lower bevel gear 111 meshing with the main bevel gear 1001 is provided at the top of the lower rotating rod 11, and a spiral conveying blade 112 is provided on the lower rotating rod 11.

[0053] Specifically, when the sleeve 502 drives the main bevel gear 1001 to rotate, it meshes with the lower bevel gear 111 on the lower rotating rod 11 for transmission. The lower rotating rod 11 drives the spiral conveying blade 112 to convey the raw materials, preventing the plastics at the bottom of the feeding hopper 4 from melting and blocking the bottom of the feeding hopper 4 due to the too high temperature in the barrel 2, ensuring the orderly feeding of the plastic raw materials, avoiding the interruption of plastic extrusion, and ensuring the quality of plastic production.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A green recycling type wire and cable flame retardant plastic extrusion method, characterized in that: The following steps are involved: S1. Debug the extruder equipment to find out the heating temperature and pressure values ​​corresponding to different plastic particles; S2, setting the heating temperature of each section of the extruder equipment; S3, placing the plastic granule raw material in the feed hopper (4) of the extruder equipment, crushing the plastic granule raw material and then mixing it; S4, making the extruder equipment melt-extrude the crushed and mixed plastic raw materials.

2. A green recycling type flame retardant plastic extrusion method for wires and cables according to claim 1, characterized in that: The extruder device comprises a base (1) and a barrel (2) arranged on the top of the base (1), an extrusion screw is rotatably arranged in the barrel (2), the feed hopper (4) is fixedly arranged on the top of the barrel (2) and is in communication with the barrel (2), a mounting plate (3) is fixedly arranged on the top of the base (1), a drive motor (301) is fixedly arranged on the mounting plate (3), the output shaft of the drive motor (301) is connected to a drive shaft (302) for driving the extrusion screw to rotate, a crushing component for crushing raw materials and a mixing component for mixing raw materials are arranged in the feed hopper (4), and a transmission component is arranged between the mixing component and the drive shaft (302).

3. A green recycling type flame retardant plastic extrusion method for wires and cables according to claim 2, characterized in that: The feed hopper (4) comprises a feed pipe (401) interconnected with the barrel (2), a mixing shell (402) fixedly mounted on the top of the feed pipe (401), and a crushing shell (403) fixedly mounted on the top of the mixing shell (402), wherein the crushing component is arranged in the crushing shell (403), and the mixing component is arranged in the mixing shell (402).

4. A green recycling type flame retardant plastic extrusion method for wires and cables according to claim 3, characterized in that: The mixing assembly comprises a rotating member (5) rotatably connected in a mixing shell (402) and a mixing plate (6) arranged on the rotating member (5); the transmission assembly comprises a synchronous wheel (7) arranged on the rotating member (5) and the driving shaft (302); a synchronous belt is arranged between the two synchronous wheels (7).

5. A green recycling type flame retardant plastic extrusion method for wires and cables according to claim 4, characterized in that: The rotating member (5) comprises a rotating rod (501) connected to a synchronous wheel (7) and a sleeve (502) slidably connected to the outer side of the rotating rod (501); the mixing plate (6) is fixedly arranged on the sleeve (502); a push rod (5011) is fixedly arranged on the rotating rod (501); a force block (5021) is rotatably connected to the sleeve (502); an extrusion inclined surface movably opposed to the push rod (5011) is formed on the force block (5021); and an elastic telescopic rod (503) is arranged between the force block (5021) and the outer wall of the mixing shell (402).

6. A green recycling type flame retardant plastic extrusion method for wires and cables according to claim 5, characterized in that: The crushing assembly comprises a support plate (8) fixedly arranged at the bottom of the crushing shell (403), an upper rotating rod (801) rotatably connected to the support plate (8), and a plurality of crushing blades (802) arranged on the upper rotating rod (801).

7. A green recycling type flame retardant plastic extrusion method for wires and cables according to claim 6, characterized in that: A reciprocating screw rod (9) is arranged on the outer side of the upper rotating rod (801), a sleeve (901) is threadedly connected to the reciprocating screw rod (9), a limited telescopic rod is arranged between the sleeve (901) and the support plate (8), and a filter cylinder (902) slidably connected to the crushing shell (403) is fixedly arranged on the outer side of the sleeve (901).

8. A green recycling type flame retardant plastic extrusion method for wires and cables according to claim 7, characterized in that: A working shell (10) is fixedly arranged in the mixing shell (402) via a support plate, a main bevel gear (1001) is rotatably connected in the working shell (10), an upper bevel gear (803) meshing with the main bevel gear (1001) is arranged on the upper rotating rod (801), and the upper bevel gear (803) is slidably connected to the sleeve (502).

9. A green recycling type wire and cable flame retardant plastic extrusion method according to claim 8, characterized in that: The sleeve (502) is fixedly provided with a guide bar (5022), and the upper bevel gear (803) and the rotating rod (501) are provided with a guide groove (12) for the guide bar (5022) to slide.

10. A green recycling type flame retardant plastic extrusion method for wires and cables according to claim 8, characterized in that: A lower rotating rod (11) rotatably connected to a feed tube (401) is disposed at the bottom of the working shell (10), a lower bevel gear (111) meshing with a main bevel gear (1001) is disposed at the top of the lower rotating rod (11), and a spiral conveying blade (112) is disposed on the lower rotating rod (11).

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