Electronic product shell recovery method

Abstract

The invention belongs to the technical field of plastic recovery and regeneration, and particularly relates to a method for recovering a plastic shell of an electronic product, which is characterized by comprising the following process steps of: 1, crushing and recovering: disassembling electronic equipment, feeding a shell part into a crusher for crushing until the diameter is 50; the process comprises the following steps of: crushing plastic shells of electronic products, separating iron metal parts mixed in the plastic shells by using a high-magnetic separator, crushing the iron metal parts to phi 10, and performing electrostatic separation and dry specific gravity screening until the copper content is less than 0.1%, so as to obtain the required recycled plastic. Compared with the prior art, the process has the following advantages that shells of electronic products can be recycled, after shell plastic is cleaned, smashed, selected and the like, recycled materials are softened and modified, and finally regenerated plastic particles with excellent properties are obtained; the indexes such as the structural strength and the oxidation resistance of the regenerated plastic can completely meet the performance requirements of engineering plastics.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic recycling and regeneration, and in particular relates to a method for recycling plastic shells of electronic products. Background Art

[0002] Many parts of electronic products are disassembled and refurbished for reuse because they still have value; some chips can be used to extract precious metals such as gold and silver.

[0003] However, the recycling rate of plastic shells of electronic products is low, because the recycling value of this material is not as high as the utilization value of other electronic parts. If these shells cannot be recycled, they can only become solid waste. The shells of electronic products are mostly made of ABS engineering plastics, which have a very low natural degradation rate. After being discarded, they will exist in nature for a long time, causing pollution to the environment and threatening the survival of other organisms. Summary of the invention

[0004] In view of the above problems, the object of the present invention is to provide a method for recycling plastic shells of electronic products.

[0005] The method for recycling plastic shells of electronic products is characterized by comprising the following process steps: 1. Crushing and recycling: The electronic equipment is disassembled and the outer shell parts are sent to the crusher for crushing. The crushing is done to φ50. The iron metal parts mixed in are sorted out by a high magnetic separator. The crushing is done to φ10 again. Then, the copper content is screened to less than 0.1% through electrostatic separation and dry specific gravity screening to obtain the required recycled plastic.

[0006] 2. Softening and regeneration: According to the mass proportion, 80 parts of recycled plastics are fed into the mixer, and then the recycled plastics are heated to 140-160°C to soften and modify the recycled plastics. Then 40-60 parts of ABS resin, 10-15 parts of calcium carbonate, 3-6 parts of glass fiber, 3-6 parts of carbon black, and 5-8 parts of mica are added to the mixer and mixed for 15-20 minutes. The speed of the mixer is 200-220r / min to obtain the required recycled material.

[0007] 3. Extrusion granulation: The modified plastic is fed into a twin-screw extruder at a speed of 300-350r / min for extrusion granulation. The extruded plastic particles are cooled to room temperature to obtain recycled plastic for the plastic shell of electronic products.

[0008] Preferably, the discharge temperature of the extruder in step 3 is 110-120°C The process for recycling the plastic shell of electronic products provided by the present invention has the following advantages compared with the prior art: This process can recycle the shells of electronic products. After cleaning, crushing, and selecting the shell plastic, the recycled material is softened and modified to finally obtain recycled plastic particles with excellent properties. The structural strength and antioxidant properties of the recycled plastic can fully meet the performance requirements of engineering plastics. DETAILED DESCRIPTION

[0009] The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0010] The method for recycling plastic shells of electronic products is characterized by comprising the following process steps: 1. Crushing and recycling: The electronic equipment is disassembled and the outer shell parts are sent to the crusher for crushing. The crushing is done to φ50. The iron metal parts mixed in are sorted out by a high magnetic separator. The crushing is done to φ10 again. Then, the copper content is screened to less than 0.1% through electrostatic separation and dry specific gravity screening to obtain the required recycled plastic.

[0011] 2. Softening and regeneration: According to the mass proportion, 80 parts of recycled plastics are fed into the mixer, and then the recycled plastics are heated to 140°C to soften and modify the recycled plastics. Then 40 parts of ABS resin, 10 parts of calcium carbonate, 3 parts of glass fiber, 3 parts of carbon black and 5 parts of mica are added into the mixer and mixed for 15 minutes. The speed of the mixer is 200 r / min to obtain the required recycled material.

[0012] 3. Extrusion granulation: The modified plastic is fed into a twin-screw extruder at a speed of 300r / min for extrusion granulation. The extruded plastic particles are cooled to room temperature to obtain recycled plastic for the plastic shell of electronic products. Embodiment 2

[0013] The method for recycling plastic shells of electronic products is characterized by comprising the following process steps: 1. Crushing and recycling: The electronic equipment is disassembled and the outer shell parts are sent to the crusher for crushing. The crushing is done to φ50. The iron metal parts mixed in are sorted out by a high magnetic separator. The crushing is done to φ10 again. Then, the copper content is screened to less than 0.1% through electrostatic separation and dry specific gravity screening to obtain the required recycled plastic.

[0014] 2. Softening and regeneration: According to the mass proportion, 80 parts of recycled plastics are fed into the mixer, and then the recycled plastics are heated to 160°C to soften and modify the recycled plastics. Then 60 parts of ABS resin, 15 parts of calcium carbonate, 3-6 parts of glass fiber, 6 parts of carbon black and 8 parts of mica are added into the mixer, and the above substances are mixed and stirred for 20 minutes. The speed of the mixer is 20r / min to obtain the required recycled materials.

[0015] 3. Extrusion granulation: The modified plastic is fed into a twin-screw extruder at a speed of 350r / min for extrusion granulation. The extruded plastic particles are cooled to room temperature to obtain recycled plastic for the plastic shell of electronic products.

[0016] The discharge temperature of the extruder is 110°C Embodiment 3

[0017] The method for recycling plastic shells of electronic products is characterized by comprising the following process steps: 1. Crushing and recycling: The electronic equipment is disassembled and the outer shell parts are sent to the crusher for crushing. The crushing is done to φ50. The iron metal parts mixed in are sorted out by a high magnetic separator. The crushing is done to φ10 again. Then, the copper content is screened to less than 0.1% through electrostatic separation and dry specific gravity screening to obtain the required recycled plastic.

[0018] 2. Softening and regeneration: According to the mass proportion, 80 parts of recycled plastics are fed into the mixer, and then the recycled plastics are heated to 148°C to soften and modify the recycled plastics. Then 48 parts of ABS resin, 13 parts of calcium carbonate, 4 parts of glass fiber, 4 parts of carbon black and 6 parts of mica are added into the mixer and mixed and stirred for 18 minutes. The speed of the mixer is 210r / min to obtain the required recycled materials.

[0019] 3. Extrusion granulation: The modified plastic is fed into a twin-screw extruder at a speed of 330r / min for extrusion granulation. The extruded plastic particles are cooled to room temperature to obtain recycled plastic for the plastic shell of electronic products.

[0020] Preferably, the discharge temperature of the extruder in step 3 is 115°C Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A method for recycling plastic shells of electronic products, characterized in that: The process steps include:

1. Crushing and recycling: The electronic equipment is disassembled, and the shell parts are sent to the crusher for crushing, crushed to φ50, and the iron metal parts mixed in are sorted out by a high magnetic separator, and then crushed to φ10, and then electrostatic separation and dry specific gravity screening are used to select the copper content to be less than 0.1%, and the required recycled plastic is obtained; 2. Softening and regeneration: according to the mass fraction, 80 parts of recycled plastics are fed into the mixer, and then the recycled plastics are heated to 140-160°C to soften and modify the recycled plastics, and then 40-60 parts of ABS resin, 10-15 parts of calcium carbonate, 3-6 parts of glass fiber, 3-6 parts of carbon black, and 5-8 parts of mica are added to the mixer to mix and stir the above substances for 15-20 minutes. The speed of the mixer is 200-220r / min to obtain the required recycled materials; 3. Extrusion granulation: The modified plastic is fed into a twin-screw extruder at a speed of 300-350r / min for extrusion granulation. The extruded plastic particles are cooled to room temperature to obtain recycled plastic for the plastic shell of electronic products.

2. The method for recycling plastic shells of electronic products according to claim 1, characterized in that: The discharge temperature of the extruder in step 3 is 110-120°C.

3. The method for recycling plastic shells of electronic products according to claim 1, characterized in that: The process steps include:

1. Crushing and recycling: The electronic equipment is disassembled, and the shell parts are sent to the crusher for crushing, crushed to φ50, and the iron metal parts mixed in are sorted out by a high magnetic separator, and then crushed to φ10, and then electrostatic separation and dry specific gravity screening are used to select the copper content to be less than 0.1%, and the required recycled plastic is obtained; 2. Softening and regeneration: according to the mass fraction, 80 parts of recycled plastics are fed into the mixer, and then the recycled plastics are heated to 140°C to soften and modify the recycled plastics, and then 40 parts of ABS resin, 10 parts of calcium carbonate, 3 parts of glass fiber, 3 parts of carbon black, and 5 parts of mica are added to the mixer to mix and stir the above substances for 15 minutes. The speed of the mixer is 200 r / min to obtain the required recycled materials; 3. Extrusion granulation: The modified plastic is fed into a twin-screw extruder at a speed of 300r / min for extrusion granulation. The extruded plastic particles are cooled to room temperature to obtain recycled plastic for the plastic shell of electronic products.

4. The method for recycling plastic shells of electronic products according to claim 1, characterized in that: The process steps include:

1. Crushing and recycling: The electronic equipment is disassembled, and the shell parts are sent to the crusher for crushing, crushed to φ50, and the iron metal parts mixed in are sorted out by a high magnetic separator, and then crushed to φ10, and then electrostatic separation and dry specific gravity screening are used to select the copper content to be less than 0.1%, and the required recycled plastic is obtained; 2. Softening and regeneration: according to the mass fraction, 80 parts of recycled plastics are fed into the mixer, and then the recycled plastics are heated to 160°C to soften and modify the recycled plastics. Then 60 parts of ABS resin, 15 parts of calcium carbonate, 3-6 parts of glass fiber, 6 parts of carbon black, and 8 parts of mica are added to the mixer, and the above substances are mixed and stirred for 20 minutes. The speed of the mixer is 20r / min to obtain the required recycled materials; 3. Extrusion granulation: The modified plastic is fed into a twin-screw extruder at a speed of 350r / min for extrusion granulation. The extruded plastic particles are cooled to room temperature to obtain recycled plastic for the plastic shell of electronic products.

5. The method for recycling plastic shells of electronic products according to claim 1, characterized in that: The process steps include:

1. Crushing and recycling: The electronic equipment is disassembled, and the shell parts are sent to the crusher for crushing, crushed to φ50, and the iron metal parts mixed in are sorted out by a high magnetic separator, and then crushed to φ10, and then electrostatic separation and dry specific gravity screening are used to select the copper content to be less than 0.1%, and the required recycled plastic is obtained; 2. Softening and regeneration: according to the mass fraction, 80 parts of recycled plastics are fed into the mixer, and then the recycled plastics are heated to 148°C to soften and modify the recycled plastics, and then 48 parts of ABS resin, 13 parts of calcium carbonate, 4 parts of glass fiber, 4 parts of carbon black, and 6 parts of mica are added to the mixer to mix and stir the above substances for 18 minutes. The speed of the mixer is 210r / min to obtain the required recycled materials; 3. Extrusion granulation: The modified plastic is fed into a twin-screw extruder at a speed of 330r / min for extrusion granulation. The extruded plastic particles are cooled to room temperature to obtain recycled plastic for the plastic shell of electronic products.