Continuous extrusion tray internal mixing device and preparation process thereof

Abstract

The invention discloses a continuous extrusion tray banburying device and a preparation process thereof. The preparation process comprises the following steps: S1, raw material preparation: main raw materials are plastic, inorganic split, plant fibers and resin; the auxiliary agents comprise a plasticizer, a stabilizer, a filling agent, a lubricating agent and a coloring agent; s2, plastic material treatment: the recycled waste plastic is pretreated, and the pretreatment comprises sorting, label paper and screw removal, crushing and cleaning; and S3, single-screw extrusion and internal mixing are conducted, specifically, plastic materials are treated and then added into a single-screw extruder, auxiliary agents, inorganic split, plant fibers and resin are added, and heating, internal mixing and extrusion are conducted in the screw extruder. According to the invention, through recovery of waste plastics, single-screw extrusion banburying, mold hydraulic forming and stacking of the mechanical arm, the waste plastics are recycled, meanwhile, trays are efficiently produced, the production effect of the trays is greatly improved, and the waste plastics are turned into wealth.

Description

Technical Field

[0001] The present invention relates to the technical field of pallet processing, and particularly relates to a continuous extrusion pallet internal mixer device and its preparation process. Background Art

[0002] A pallet is a medium that transforms static goods into dynamic goods. It is a loading platform, and moreover, it is a movable platform, or a movable ground. Even goods that lose flexibility when placed on the ground immediately gain mobility once loaded onto a pallet and become flexible flowing goods because the goods loaded on the pallet are always in a state ready to move. Pallets are classified into wooden pallets and plastic pallets according to the material.

[0003] Plastic pallets are favored and sought after in the food and pharmaceutical industries due to their anti-corrosion, moisture-proof, rust-proof, insect-proof, and non-moldy characteristics. In addition, plastic pallets have the characteristics of high load-bearing performance and long service life, and are widely used in fields such as chemical industry, light textile, and manufacturing.

[0004] The production of plastic pallets generally includes raw material preparation, pretreatment of plastic particles, injection molding, cooling, mold opening and removal, trimming and removal of surplus materials, quality inspection, printing marks, and packaging for factory shipment.

[0005] Currently, there are various types of waste plastics, and the reuse of waste plastics is also a new topic. In the treatment of urban plastic solid waste, currently, mainly three methods are adopted: landfill, incineration, and recycling and reuse.

[0006] However, currently, the raw materials for preparing pallets generally use new plastics, and the utilization ratio of waste plastics is relatively low. If waste plastics are used to produce plastic pallets, then the problem of waste material regeneration that needs to be solved urgently at present. Therefore, it is urgent to design a continuous extrusion pallet internal mixer device and its preparation process to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a continuous extrusion pallet internal mixer device and its preparation process to solve the above deficiencies in the prior art.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A preparation process for continuous extrusion pallet internal mixing includes the following steps:

[0010] S1. Raw material preparation:

[0011] The main raw materials are plastics, inorganic powders, plant fibers, and resins;

[0012] The auxiliary additives are plasticizers, stabilizers, fillers, lubricants, and colorants;

[0013] S2. Plastic material treatment: Pretreat the recycled waste plastics, including sorting, removing label paper, screws, crushing, and cleaning.

[0014] S3. Single-screw extrusion and kneading: After the plastic material treatment, add it into the single-screw extruder, and add auxiliary additives, inorganic powder, plant fiber, and resin, then heat, knead, and extrude inside the screw extruder.

[0015] S4. Mold hydraulic forming: Add the extruded molten raw material into the hydraulic mold, and the hydraulic press moves to realize the forming process of the tray.

[0016] S5. Robotic arm palletizing: Use a multi-degree-of-freedom robotic arm to take out the formed tray from the hydraulic mold and place it on the subsequent conveying mechanism.

[0017] S6. Conveying of the formed tray: Use the conveying mechanism to transfer the tray palletized by the multi-degree-of-freedom robotic arm.

[0018] S7. Post-treatment: Trim the corners of the tray, remove the surplus material, conduct quality inspection, and print marks.

[0019] S8. Packaging: Package the tray with a packaging carton and print the inkjet coding information.

[0020] In the preferred embodiment of the present invention, the components of plastic, inorganic powder, plant fiber, and resin by weight are as follows:

[0021] Plastic: 50 - 70;

[0022] Inorganic powder: 15 - 20;

[0023] Plant fiber: 10 - 15;

[0024] Resin: 10 - 18;

[0025] Plasticizer: 1 - 2;

[0026] Stabilizer: 1 - 3;

[0027] Filler: 0.8 - 1.8;

[0028] Lubricant: 0.5 - 3;

[0029] Colorant: 0.7 - 1.3.

[0030] In the preferred embodiment of the present invention, for S2, plastic material treatment, the treatment of recycled waste plastics:

[0031] Sorting: Since plastics of different categories have different physical and chemical properties, sorting must be carried out for further recycling. The sorted plastics enter different crushing systems according to different types for crushing.

[0032] Crushing: Use special instruments to crush. A crusher is used to crush the plastics, and the discharged materials are 2-3 cm fragments for easy storage and further cleaning.

[0033] Cleaning: Since some waste plastics will adhere to dust, oil, etc. during use, the crushed plastics must be cleaned to remove impurities to avoid affecting the quality of recycled plastics. Metals such as screws mixed during the plastic crushing process will also be removed through cleaning.

[0034] In the preferred solution of the present invention, the sorting process adopted is one of specific gravity sorting, sorting by professionals, sorting by special instruments, etc.

[0035] In the preferred solution of the present invention, S3. Single-screw extrusion and mixing: For a single-screw extruder, the screw of the extruder is divided into four sections, namely the feeding section, the compression section, the mixing section, and the exhaust section.

[0036] The temperature of the screw extruder is set from the feeding port to the outlet as: 180-210 °C, 210-216 °C, 225-235 °C, 240-260 °C respectively.

[0037] In the preferred solution of the present invention, S4. Mold hydraulic forming. While the hydraulic mold is connected to a heating device, the hydraulic mold is also connected to a chiller to maintain a fixed temperature of 280 °C for the mold.

[0038] A continuous extrusion tray mixing device includes a preparation process of the continuous extrusion tray mixing described above, including a silo. A screw conveyor is provided at the bottom of the silo, a hoist is provided at the distal end of the screw conveyor, and a single-screw extrusion mixer is provided below one end of the hoist away from the screw conveyor.

[0039] A filling hopper is provided at the top of the single-screw extrusion mixer, and the filling hopper is located below the top end of the hoist.

[0040] A hydraulic mold is provided at one end of the single-screw extrusion mixer, and the hydraulic mold is at least used for forming molten plastics.

[0041] A multi-degree-of-freedom manipulator is provided on one side of the hydraulic mold, and a conveying mechanism is provided on one side of the multi-degree-of-freedom manipulator. Formed trays completed by palletizing by the multi-degree-of-freedom manipulator are placed on the conveying mechanism.

[0042] In a preferred embodiment of the present invention, several control boxes are provided on one side of the single-screw extrusion mixer. The control boxes are at least used for the working parameters of the single-screw extrusion mixer, elevator, screw conveyor, hydraulic mold, multi-degree-of-freedom manipulator, and conveying mechanism.

[0043] In a preferred embodiment of the present invention, a bench is provided on the top of the hydraulic mold, and a ladder is provided on one side of the hydraulic mold.

[0044] In a preferred embodiment of the present invention, the maximum particle size of the waste plastic fragments entering the feed bin is 3 - 5 cm, and the maximum temperature of the plastic extruded by the single-screw extrusion mixer is 280 °C.

[0045] In the above technical solution, a continuous extrusion tray mixing device and its preparation process provided by the present invention realize the recycling of waste plastics through the recycling of waste plastics, single-screw extrusion mixing, die hydraulic forming, and segment coding by a robotic arm. At the same time, trays are efficiently produced, greatly improving the production effect of trays and turning waste plastics into treasures. The production device saves labor and greatly improves production efficiency. Only one person is required per shift to manage the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0047] Figure 1 It is a structural process flow chart provided for an embodiment of a continuous extrusion tray mixing device and its preparation process of the present invention.

[0048] Figure 2 It is a schematic structural diagram of the mixing device provided for an embodiment of a continuous extrusion tray mixing device and its preparation process of the present invention Figure 1 。

[0049] Figure 3 It is a schematic structural diagram of the mixing device provided for an embodiment of a continuous extrusion tray mixing device and its preparation process of the present invention Figure 2 。

[0050] DESCRIPTION OF THE REFERENCE NUMERALS:

[0051] 1. Single-screw extrusion mixer; 2. Control box; 3. Filling hopper; 4. Elevator; 5. Screw conveyor; 6. Feed bin; 7. Hydraulic mold; 8. Ladder; 9. Bench; 10. Multi-degree-of-freedom manipulator; 11. Conveying mechanism; 12. Formed tray. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0053] As Figures 1-3 shown, a continuous extrusion tray internal mixer device and its preparation process provided by an embodiment of the present invention include the following steps: S1. Raw material preparation: The main raw materials are plastics, inorganic powders, plant fibers, and resins; the auxiliary additives are plasticizers, stabilizers, fillers, lubricants, and colorants;

[0054] S2. Plastic material treatment: The recycled waste plastics are pre-treated, and the pre-treatment is sorting, removing label paper, screws, crushing, and cleaning; S3. Single-screw extrusion and internal mixing: After the plastic material treatment, it is added into the single-screw extruder, and auxiliary additives, inorganic powders, plant fibers, and resins are added, and heating, internal mixing, and extrusion are carried out inside the screw extruder; S4. Mold hydraulic forming: The extruded molten raw materials are added into the hydraulic mold, and the hydraulic press moves to realize the forming process of the tray; S5. Robotic arm palletizing: Through a multi-degree-of-freedom robotic arm, the formed tray is taken out from the hydraulic mold and discharged onto the subsequent conveying mechanism; S6. Conveying of the formed tray: Using the conveying mechanism, the trays palletized by the multi-degree-of-freedom robotic arm are transported; S7. Post-treatment: Trimming the corners of the tray, removing surplus materials, quality inspection, and printing marks; S8. Packaging: The tray is packaged with a packaging carton, and the inkjet information is printed.

[0055] A preparation process for continuous extrusion tray internal mixing includes the following steps:

[0056] S1. Raw material preparation:

[0057] The main raw materials are plastics, inorganic powders, plant fibers, and resins;

[0058] The auxiliary additives are plasticizers, stabilizers, fillers, lubricants, and colorants;

[0059] In this embodiment, the components of plastics, inorganic powders, plant fibers, and resins by weight are:

[0060] Plastics: 55;

[0061] Inorganic powders: 15;

[0062] Plant fibers: 11;

[0063] Resins: 12;

[0064] Plasticizers: 1.2;

[0065] Stabilizers: 1.8;

[0066] Filler: 1;

[0067] Lubricant: 2;

[0068] Colorant: 1.

[0069] S2. Plastic material treatment: The recycled waste plastics are pre-treated, and the pre-treatment includes sorting, removing label paper, screws, crushing, and cleaning;

[0070] In this embodiment, for S2. Plastic material treatment, the treatment of recycled waste plastics:

[0071] Sorting: Since the physical and chemical properties of different types of plastics are different, in order to further recycle and utilize them, sorting must be carried out. The sorted plastics enter different crushing systems for crushing according to different types;

[0072] Crushing: Use special instruments to crush. A crusher is used to crush the plastics, and the discharged materials are 2 - 3 cm fragments, which are convenient for storage and further cleaning;

[0073] Cleaning: Since some waste plastics will adhere to dust, oil, etc. during use, the crushed plastics must be cleaned to remove impurities to avoid affecting the quality of recycled plastics. Through cleaning, metals such as screws mixed in the plastic crushing process will also be removed.

[0074] In this embodiment, the sorting process adopted is one of the following: specific gravity sorting, professional personnel sorting, special instrument sorting, etc.

[0075] S3. Single - screw extrusion and mixing: After the plastic materials are treated, they are added into the single - screw extruder, and auxiliary additives, inorganic powder, plant fibers, and resin are added, and heating, mixing, and extrusion are carried out inside the screw extruder;

[0076] In this embodiment, for S3. Single - screw extrusion and mixing: In the single - screw extruder, the screw of the extruder is divided into four sections, namely the feeding section, the compression section, the mixing section, and the exhaust section;

[0077] The temperature of the screw extruder is set from the feeding port to the outlet as: 180 - 210 °C, 210 - 216 °C, 225 - 235 °C, 240 - 260 °C.

[0078] S4. Mold hydraulic forming: The molten raw materials after extrusion are added into the hydraulic mold, and the hydraulic press moves to realize the forming process of the tray;

[0079] In this embodiment, for S4. Mold hydraulic forming, while the hydraulic mold is connected to the heating device, the hydraulic mold is also connected to a chiller to keep the mold at a fixed temperature of 280 °C.

[0080] S5. Robotic arm palletizing: Using a multi-degree-of-freedom robotic arm, the formed pallets are taken out from the inside of the hydraulic mold and placed on the subsequent conveying mechanism in a row;

[0081] S6. Conveying of formed pallets: Using the conveying mechanism to transfer the pallets palletized by the multi-degree-of-freedom robotic arm;

[0082] S7. Post-treatment: Trimming the edges and removing excess materials, quality inspection, and printing marks on the pallets;

[0083] S8. Packaging: Packing the pallets with packaging cartons and printing and spraying code information.

[0084] A continuous extrusion pallet internal mixer device, including a preparation process for continuous extrusion pallet internal mixing, which includes a silo 6. A screw conveyor 5 is arranged at the bottom of the silo 6. A hoist 4 is arranged at the distal end of the screw conveyor 5. A single-screw extrusion internal mixer 1 is arranged below one end of the hoist 4 away from the screw conveyor 5;

[0085] A filling hopper 3 is arranged at the top of the single-screw extrusion internal mixer 1, and the filling hopper 3 is located below the top end of the hoist 4;

[0086] One end of the single-screw extrusion internal mixer 1 is provided with a hydraulic mold 7, and the hydraulic mold 7 is at least used for forming molten plastic;

[0087] A multi-degree-of-freedom robotic arm 10 is arranged on one side of the hydraulic mold 7, and a conveying mechanism 11 is arranged on one side of the multi-degree-of-freedom robotic arm 10. The formed pallets 12 palletized by the multi-degree-of-freedom robotic arm are placed on the conveying mechanism 11.

[0088] In this embodiment, several control boxes 2 are arranged on one side of the single-screw extrusion internal mixer 1, and the control boxes 2 are at least used for the working parameters of the single-screw extrusion internal mixer 1, the hoist 4, the screw conveyor 5, the hydraulic mold 7, the multi-degree-of-freedom robotic arm 10 and the conveying mechanism 11.

[0089] In this embodiment, a platform 9 is arranged at the top of the hydraulic mold 7, and a ladder 8 is arranged on one side of the hydraulic mold 7. Using the ladder 8, people can better enter above the platform 9 to realize the maintenance and installation of the hydraulic mold 7.

[0090] In this embodiment, the maximum particle size of the waste plastic fragments entering the silo is 3 - 5 cm, so that the plastic inside the silo 6 can better enter the hoist 4 through the screw conveyor 5 for conveying. The highest temperature of the plastic extruded by the single-screw extrusion internal mixer 1 is 280 °C, which can enable the molten raw material extruded by the single-screw extrusion internal mixer 1 to enter the inside of the hydraulic mold 7, and the hydraulic mold 7 controls the temperature of the raw material, so as to better form the pallet product.

[0091] Only certain exemplary embodiments of the present invention have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A preparation process for continuous extrusion pallet internal mixing, characterized in that, It includes the following steps: S1. Raw material preparation: The main raw materials are plastics, inorganic powder, plant fibers and resins; The auxiliary additives are plasticizers, stabilizers, fillers, lubricants, colorants; S2. Plastic material treatment: Pretreat the recycled waste plastics, and the pretreatment includes sorting, removing label paper, screws, crushing, and cleaning; S3. Single-screw extrusion and mixing: After the plastic material treatment, add it into the single-screw extruder, and add auxiliary additives, inorganic powder, plant fibers and resins, and perform heating, mixing and extrusion inside the screw extruder; S4. Mold hydraulic forming: Add the extruded molten raw material into the hydraulic mold, and the hydraulic press moves to realize the forming process of the tray; S5. Robotic arm palletizing: Use a multi-degree-of-freedom robotic arm to take out the formed tray from the hydraulic mold and place it on the subsequent conveying mechanism; S6. Conveying of the formed tray: Use the conveying mechanism to transfer the tray palletized by the multi-degree-of-freedom robotic arm; S7. Post-treatment: Trim the edges and remove the surplus material of the tray, conduct quality inspection, and print marks; S8. Packaging: Package the tray with a packaging carton and print and spray code information.

2. The preparation process of continuous extrusion pallet internal mixer according to claim 1, characterized in that The composition of plastics, inorganic powder, plant fibers and resins by weight: Plastics: 50 - 70; Inorganic powder: 15 - 20; Plant fibers: 10 - 15; Resins: 10 - 18; Plasticizers: 1 - 2; Stabilizers: 1 - 3; Fillers: 0.8 - 1.8; Lubricants: 0.5 - 3; Colorants: 0.7 - 1.

3.

3. The preparation process of continuous extrusion tray internal mixer according to claim 1, characterized in that, S2. Plastic material treatment, for the treatment of waste recycled plastics: Sorting: Since the physical and chemical properties of different types of plastics are different, in order to further recycle and utilize them, sorting must be carried out. The sorted plastics enter different crushing systems for crushing according to different types; Crushing: Use a special instrument to crush, and use a crusher to crush the plastics. The discharged material is fragments for easy storage and further cleaning; Cleaning: Since some waste plastics will adhere to dust, oil stains, etc. during use, the crushed plastics must be cleaned to remove impurities to avoid affecting the quality of recycled plastics. Through cleaning, metals such as screws mixed in the plastic crushing process will also be removed.

4. The preparation process of continuous extrusion tray internal mixer according to claim 3, characterized in that, The sorting process adopted is one of specific gravity sorting, professional personnel sorting, special instrument sorting, etc.

5. The preparation process of continuous extrusion tray internal mixer according to claim 1, characterized in that, S3. Single-screw extrusion and mixing: The single-screw extruder, the screw of the extruder is divided into four sections, namely the feeding section, the compression section, the mixing section and the exhaust section; The temperature of the screw extruder is set from the feeding port to the outlet as: 180 - 210 °C, 210 - 216 °C, 225 - 235 °C, 240 - 260 °C respectively.

6. The preparation process of continuous extrusion tray internal mixing according to claim 1, characterized in that, S4. Mold hydraulic forming, while the hydraulic mold is connected to the heating device, the hydraulic mold is also connected to a chiller to maintain a fixed temperature of 280 °C for the mold.

7. A continuous extrusion tray internal mixer device, comprising a preparation process for continuous extrusion tray internal mixing according to any one of claims 1-6, characterized in that, It includes a silo (6), a screw conveyor (5) is arranged at the bottom of the silo (6), a hoist (4) is arranged at the distal end of the screw conveyor (5), and a single-screw extrusion and mixing machine (1) is arranged below one end of the hoist (4) away from the screw conveyor (5); A charging hopper (3) is provided at the top of the single-screw extrusion internal mixer (1), and the charging hopper (3) is located below the top end of the elevator (4). A hydraulic mold (7) is provided at one end of the single-screw extrusion internal mixer (1), and the hydraulic mold (7) is at least used for molding molten plastics. A multi-degree-of-freedom manipulator (10) is provided on one side of the hydraulic mold (7), and a conveying mechanism (11) is provided on one side of the multi-degree-of-freedom manipulator (10). A formed pallet (12) completed by palletizing by the multi-degree-of-freedom manipulator is placed on the conveying mechanism (11).

8. A continuous extrusion tray internal mixer device and its preparation process according to claim 7, characterized in that, A plurality of control boxes (2) are provided on one side of the single-screw extrusion internal mixer (1), and the control boxes (2) are at least used for the working parameters of the single-screw extrusion internal mixer (1), the elevator (4), the auger conveyor (5), the hydraulic mold (7), the multi-degree-of-freedom manipulator (10) and the conveying mechanism (11).

9. A continuous extrusion tray internal mixer device and its preparation process according to claim 7, characterized in that A platform (9) is provided at the top of the hydraulic mold (7), and a ladder (8) is provided on one side of the hydraulic mold (7).

10. A continuous extrusion tray internal mixer device and its preparation process according to claim 7, characterized in that, The maximum particle size of the waste plastic fragments entering the silo is 3 - 5 cm, and the highest temperature of the plastic extruded by the single-screw extrusion internal mixer (1) is 280 °C.

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