CN110951136A - Formula of high-transparency recycled plastic, preparation method and granulator - Google Patents
Formula of high-transparency recycled plastic, preparation method and granulator Download PDFInfo
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- CN110951136A CN110951136A CN201911162696.7A CN201911162696A CN110951136A CN 110951136 A CN110951136 A CN 110951136A CN 201911162696 A CN201911162696 A CN 201911162696A CN 110951136 A CN110951136 A CN 110951136A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 101
- 239000004033 plastic Substances 0.000 title claims abstract description 101
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 79
- -1 polyethylene Polymers 0.000 claims abstract description 76
- 239000000463 material Substances 0.000 claims abstract description 74
- 239000004698 Polyethylene Substances 0.000 claims abstract description 41
- 229920000573 polyethylene Polymers 0.000 claims abstract description 41
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- 229920001155 polypropylene Polymers 0.000 claims abstract description 35
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 239000003381 stabilizer Substances 0.000 claims abstract description 19
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 17
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 15
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 15
- 239000004014 plasticizer Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims description 22
- 230000004048 modification Effects 0.000 claims description 22
- 238000012986 modification Methods 0.000 claims description 22
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- 238000004806 packaging method and process Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005282 brightening Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000012768 molten material Substances 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 239000002585 base Substances 0.000 description 15
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- 230000003000 nontoxic effect Effects 0.000 description 1
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a high-transparency recycled plastic formula, a preparation method and a granulator, which comprise recycled polyethylene particles, recycled polypropylene particles, calcium carbonate powder, graphene powder, an antioxidant, a brightener, a stabilizer and a plasticizer, wherein in the component proportion, the recycled polyethylene particles account for 60% of the total weight of the specific components, the recycled polypropylene particles account for 30% of the total weight of the specific components, the calcium carbonate accounts for 3% of the total weight of the specific components, the graphene accounts for 2% of the total weight of the specific components, the plasticizer accounts for 2% of the total weight of the specific components, the antioxidant accounts for 1% of the total weight of the specific components, the brightener accounts for 1% of the total weight of the specific components, and the stabilizer accounts for 1% of the total weight. When the same amount of the recycled plastic is used, the transparency of the components in the mixing proportion is the best, and the mixed material has excellent toughness and good heat resistance, so the component proportion adopted in the invention is the best scheme which gives consideration to various properties of the recycled plastic.
Description
Technical Field
The invention relates to the technical field of recycled plastics, in particular to a high-transparency recycled plastic formula, a preparation method and a granulator.
Background
The plastic is made from products refined from petroleum, so that the recycled plastic can save petroleum resources, improve the environment and create good economic benefits, the recycled plastic is the recycling of the plastic, the recycling of the plastic is completed after the mechanical blade crushing operation is carried out, the recycled plastic refers to a plastic raw material obtained by processing and processing waste plastic through physical or chemical methods such as pretreatment, melting granulation, modification and the like, the plastic is recycled, the recycled plastic has the greatest advantage that the price is cheaper than a new material, although the overall performance and the property are not as strong as the new material, the material with good properties and performances is not necessary to be used for manufacturing the recycled plastic in the aspects of manufacturing many products, so many unnecessary properties are wasted, and the recycled plastic can be used according to different needs, the corresponding product can be manufactured only by processing the attribute of a certain aspect, so that the resource loss is avoided, and the evaluation of the recycled plastic is influenced by the application, the processing characteristics, the application range and other special requirements of the recycled plastic.
Among plastics, the application of recycling polyethylene particles and recycling polypropylene particles is most popular, the recycled polyethylene particles are the varieties with the highest yield in the plastic industry, the recycled polyethylene particles are opaque or semitransparent and light crystalline plastics, and the recycled polyethylene particles have excellent low-temperature resistance, good electrical insulation and chemical stability, can resist corrosion of most of acid and alkali, but are not heat-resistant; the recycled polypropylene particles are thermoplastic plastics obtained by polymerizing propylene, are usually colorless and semitransparent solids, are odorless and nontoxic, are lightest general plastics, have the outstanding advantages of boiling resistance in water, corrosion resistance, better strength, rigidity and transparency than recycled polyethylene particles, have the defects of poor low-temperature impact resistance and easy aging, but can be respectively improved by modification and addition of additives, and are low in price, good in comprehensive performance, easy to process and wide in application; recycled plastics based on recycled polyethylene pellets and recycled polypropylene pellets are therefore most commonly used.
The prior formula, preparation method and granulator of the recycled plastic have the following problems:
1. the existing regenerated plastic has imperfect formula, poor structural strength, heat resistance, impact resistance and the like, and is easy to age.
2. The existing preparation method of the recycled plastic needs to be improved, and when the waste plastic is recycled, the production efficiency is low, so that the economic benefit is low.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a formula, a preparation method and a granulator of synergistically improved high-transparency recycled plastic, and solves the problems that the formula of the recycled plastic is incomplete, the structural strength, the heat resistance, the impact resistance and the like of the plastic are poor, the aging is easy, the production efficiency of recycling waste plastic is low, and the economic benefit is low.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
the high-transparency recycled plastic formula is characterized in that: the composite material is prepared from the following components in percentage by mass: the method comprises the steps of recovering polyethylene particles, polypropylene particles, calcium carbonate powder, graphene powder, an antioxidant, a brightening agent, a stabilizer and a plasticizer, wherein: the recycled polyethylene particles account for 60 percent of the total weight of the components, the recycled polypropylene particles account for 30 percent of the total weight of the components, the calcium carbonate accounts for 3 percent of the total weight of the components, the graphene accounts for 2 percent of the total weight of the components, the plasticizer accounts for 2 percent of the total weight of the components, the antioxidant accounts for 1 percent of the total weight of the components, the brightener accounts for 1 percent of the total weight of the components, and the stabilizer accounts for 1 percent of the total weight of the components.
A preparation method of the high-transparency recycled plastic comprises the following steps:
s1: crushing raw materials and preparing auxiliary materials, namely crushing sixty kilograms of polyethylene reclaimed materials and thirty kilograms of polypropylene reclaimed materials into fragments or particles by using a crushing mechanism on a granulator, wherein the monomer weight of each fragment or particle is less than ten grams, and preparing two kilograms of calcium carbonate particles, two kilograms of graphene powder and two kilograms of liquid plasticizers;
s2: mixing and stirring, namely putting sixty kilograms of polyethylene reclaimed materials and thirty kilograms of polypropylene reclaimed materials into a stirring machine by using a stirring mechanism on a granulator for stirring and mixing, uniformly putting three kilograms of calcium carbonate particles and two kilograms of graphene powder in the stirring process, and then spraying two kilograms of plasticizer into the mixed components;
s3: heating the mixture; putting the uniformly stirred mixed component materials into a heating device on a granulator, and heating the component materials to one hundred and ninety ℃ to two hundred ℃ until the components are fully melted and mixed;
s4: adding auxiliary materials, gradually adding one kilogram of antioxidant, one kilogram of brightener and one kilogram of stabilizer into the molten component materials through an auxiliary material adding mechanism on the granulator, stirring while adding until the antioxidant, the brightener and the stabilizer are fully dissolved into the molten component materials, and then continuously keeping the temperature of the molten material mixed with the three auxiliary materials between one hundred and seventy ℃ and one hundred and ninety ℃ for eighty minutes;
s4: extruding and molding, namely injecting the molten mixed component into a shaping mold through a screw injection molding mechanism on a granulator, wherein the molten mixed component is changed into a rubber strip shape through an extrusion end of the mold, and guiding the rubber strip-shaped mixed component into a water pool to be cooled into a hard plastic strip or plastic rod;
s5: cutting, namely cutting the plastic strips into bar-shaped or granular shapes through a cutting mechanism on the granulator according to the process requirements;
s6: and (4) classifying and packaging, namely classifying, weighing and packaging the plastic particles obtained after cutting.
A granulator for implementing the preparation method of the high-transparency recycled plastic comprises a box-shaped base, wherein a mixing stirrer is fixedly arranged on one side of the top end of the box-shaped base, a raw material grinder is supported on the top end of the mixing stirrer through a support, the bottom end of the raw material grinder is communicated with a feeding port of the mixing stirrer through a feeding valve, a discharging pipe is arranged on one side of the mixing stirrer, a heater is wrapped at the head end of the discharging pipe, an auxiliary material filling machine is communicated with the middle of the discharging pipe, a quantitative valve is arranged at the bottom end of the auxiliary material filling machine, a melt modification tank is fixed in the middle of the top surface of the box-shaped base, the tail end of the discharging pipe is communicated with the top end of the melt modification tank, a continuous screw pump is communicated with one side of the bottom end of the melt modification tank, a fixed bottom, and the standard template is provided with a material extruding outlet, and an outlet of the continuous screw pump is communicated with the feed inlet of the fixed bottom die.
As a preferred technical scheme, a cooling water tank is fixed on one side of the box-type base, four guide rotating rollers are rotatably connected in the cooling water tank through bearings, annular partition plates are arranged on the four guide rotating rollers at intervals, a finished product discharge hole is formed in one end, far away from the box-type base, of the cooling water tank, one side, close to the box-type base, of the finished product discharge hole is movably connected with a traction rotating roller set through a bearing, and a guillotine is attached to the other side of the finished product discharge hole.
As a preferable technical scheme of the invention, a transmission case is fixed on one side of the cooling water tank, an input shaft of the transmission case is connected with a feeding motor, an output shaft of the transmission case is connected with the traction roller set, the other end of the traction roller set is connected with a cam disc in series, one side of the bottom end of the cooling water tank is movably connected with a connecting rod through a pin shaft, one end of the connecting rod is movably connected with the middle part of the guillotine, and the side of the cam disc intermittently presses and contacts the other end of the connecting rod.
As a preferred technical scheme, a control unit, a temperature controller and two frequency converters are fixedly mounted at the bottom end of the box-shaped base, the output end of the control unit is electrically connected with the temperature controller and the control ends of the frequency converters, the output end of the temperature controller is electrically connected with the heater, and the output ends of the two frequency converters are electrically connected with the continuous screw pump and the feeding motor.
As a preferred technical scheme of the invention, a temperature measuring instrument is arranged on the side of the melt modification tank and is electrically connected with the input end of the control unit.
As a preferred technical scheme of the invention, a temperature measuring instrument is arranged on the side of the melt modification tank and is electrically connected with the input end of the control unit. A high-transparency regenerated plastic formula, a preparation method and a granulator,
(III) advantageous effects
Compared with the prior art, the formula, the preparation method and the granulator of the high-transparency recycled plastic through the collaborative design have the following beneficial effects:
1. the high-transparency regenerated plastic has reasonable formula components and high transparency of products. Specifically, the recycled polyethylene particles account for 60% of the total weight of the components, the recycled polypropylene particles account for 30% of the total weight of the components, the calcium carbonate accounts for 3% of the total weight of the components, the graphene accounts for 2% of the total weight of the components, the plasticizer accounts for 2% of the total weight of the components, the antioxidant accounts for 1% of the total weight of the components, the brightener accounts for 1% of the total weight of the components, and the stabilizer accounts for 1% of the total weight of the components. When the same amount of the recycled plastic is used, the components in the mixing proportion have good transparency, and the mixed material has excellent toughness and good heat resistance, so the component proportion adopted in the invention is the best scheme for taking into account various properties of the recycled plastic.
2. According to the formula, the preparation method and the granulator of the high-transparency recycled plastic, the raw material pulverizer is arranged to automatically pulverize plastic raw materials, the material mixing stirrer is used for stirring and conveying the chopped raw materials, the raw materials are heated and added with additives and then enter the melting material modification tank for modification, the materials are continuously extruded through the continuous screw pump, plastic strips with set specifications are obtained through the standard template, and the plastic strips are cooled through the cooling water tank and then cut into required particles through the chopper, so that the high-transparency recycled plastic granulator is high in working continuity and good in economic benefit.
Drawings
FIG. 1 is a schematic view of the overall configuration of a pelletizer in accordance with the present invention;
FIG. 2 is a schematic side sectional view of a pelletizer in accordance with the present invention;
fig. 3 is a schematic view of a cooling water box and a cutting mechanism in the pelletizer according to the present invention.
In the figure: 1. a box-shaped base; 2. a mixing stirrer; 3. a raw material crusher; 4. a discharge valve; 5. a discharge pipe; 6. a heater; 7. an auxiliary material filling machine; 8. a dosing valve; 9. a melt modification tank; 10. a continuous screw pump; 11. fixing the bottom die; 12. a standard template; 13. a material extruding outlet; 14. a cooling water tank; 15. a guide roller; 16. an annular partition plate; 17. a finished product discharge hole; 18. a traction turning roll group; 19. a guillotine; 20. a transmission case; 21. a feeding motor; 22. a cam plate; 23. a connecting rod; 24. a control unit; 25. a temperature controller; 26. a frequency converter; 27. a temperature measuring instrument.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1-3, the high transparency recycled plastic formulation provided by the present invention is prepared from the following components by mass percent: the method comprises the steps of recovering polyethylene particles, polypropylene particles, calcium carbonate powder, graphene powder, an antioxidant, a brightening agent, a stabilizer and a plasticizer, wherein: the recycled polyethylene particles account for 60 percent of the total weight of the components, the recycled polypropylene particles account for 30 percent of the total weight of the components, the calcium carbonate accounts for 3 percent of the total weight of the components, the graphene accounts for 2 percent of the total weight of the components, the plasticizer accounts for 2 percent of the total weight of the components, the antioxidant accounts for 1 percent of the total weight of the components, the brightener accounts for 1 percent of the total weight of the components, and the stabilizer accounts for 1 percent of the total weight of the components.
In the embodiment, the impact strength of the recycled polypropylene at room temperature can be improved by different types of recycled polyethylene, the difference is very obvious, and for the recycled polypropylene particle/HD recycled polyethylene particle blend, when the mass fraction of the HD recycled polyethylene particles is lower than 60%, the strength of the blend is higherBasically, when the mass fraction of the HD recycled polyethylene particles is higher than 60 percent, the impact strength of the blend is increased, for the recycled polypropylene pellet/LD recycled polyethylene pellet blend, only when the mass fraction of LD recycled polyethylene pellets is higher than 60%, the impact strength is greatly improved, and for the recycled polypropylene particle/LLD recycled polyethylene particle blend, when the mass fraction of the LLD recycled polyethylene particles is more than 40 percent, the impact strength is obviously improved, when the mass fraction of the LLD recycled polyethylene particles reaches 70 percent, the impact strength of the blend is 37.5kJ/m2, the impact strength of the pure recycled polypropylene particles can reach twenty times that of the pure recycled polypropylene particles, and is ten times or four times that of the blends of the recycled polypropylene particles/HD recycled polyethylene particles and the recycled polypropylene particles/LD recycled polyethylene particles with the same dosage; under the low temperature state (-18 ℃), the improvement and change tendency of the three recycled polyethylene particles to the toughness of the recycled polypropylene particles is consistent with that at normal temperature, the toughening effect of the LLD recycled polyethylene particles to the recycled polypropylene particles is the best, and when the mass ratio of the recycled polypropylene particles to the LLD recycled polyethylene particles is 30/70, the impact strength of the blending system is 23.2kJ/m2Twenty times of pure recycled polypropylene particles, while the impact strength of the recycled polypropylene particles/HD recycled polyethylene particles and recycled polypropylene particles/LD recycled polyethylene particles blending system under the same conditions is only 5kJ/m2On the left and right, it is stated that the use of the LLD recycled polyethylene pellets is minimized when the same impact strength is achieved, meaning that the rigidity of the recycled polypropylene pellets can be maintained more; at the same dosage, the impact strength of the recycled polypropylene particles modified by the LLD recycled polyethylene particles is the best, and the mixed material has excellent toughness; in conclusion, the component proportion adopted in the invention is the best scheme considering various properties of the recycled plastic.
A preparation method of the high-transparency recycled plastic comprises the following steps:
s1: crushing raw materials and preparing auxiliary materials, namely crushing sixty kilograms of polyethylene reclaimed materials and thirty kilograms of polypropylene reclaimed materials into fragments or particles by using a crushing mechanism on a granulator, wherein the monomer weight of each fragment or particle is less than ten grams, and preparing two kilograms of calcium carbonate particles, two kilograms of graphene powder and two kilograms of liquid plasticizers;
s2: mixing and stirring, namely putting sixty kilograms of polyethylene particle reclaimed materials and thirty kilograms of polypropylene particle reclaimed materials into a stirring machine by using a stirring mechanism on a granulator for stirring and mixing, uniformly putting three kilograms of calcium carbonate particles and two kilograms of graphene powder in the stirring process, and then spraying two kilograms of plasticizer into the mixed components;
s3: heating the mixture; putting the uniformly stirred mixed component materials into a heating device on a granulator, and heating the component materials to one hundred and ninety ℃ to two hundred ℃ until the components are fully melted and mixed;
s4: adding auxiliary materials, gradually adding one kilogram of antioxidant, one kilogram of brightener and one kilogram of stabilizer into the molten component materials through an auxiliary material adding mechanism on the granulator, stirring while adding until the antioxidant, the brightener and the stabilizer are fully dissolved into the molten component materials, and then continuously keeping the temperature of the molten material mixed with the three auxiliary materials between one hundred and seventy ℃ and one hundred and ninety ℃ for eighty minutes;
s4: extruding and molding, namely injecting the molten mixed component into a shaping mold through a screw injection molding mechanism on a granulator, wherein the molten mixed component is changed into a rubber strip shape through an extrusion end of the mold, and guiding the rubber strip-shaped mixed component into a water pool to be cooled into a hard plastic strip or plastic rod;
s5: cutting, namely cutting the plastic strips into bar-shaped or granular shapes through a cutting mechanism on the granulator according to the process requirements;
s6: and (4) classifying and packaging, namely classifying, weighing and packaging the plastic particles obtained after cutting.
A granulator for implementing the preparation method of the high-transparency recycled plastic comprises a box-type base 1, wherein a mixing stirrer 2 is fixedly arranged on one side of the top end of the box-type base 1, a raw material grinder 3 is supported on the top end of the mixing stirrer 2 through a support, the bottom end of the raw material grinder 3 is communicated with a feeding port of the mixing stirrer 2 through a feeding valve 4, a discharging pipe 5 is arranged on one side of the mixing stirrer 2, the head end of the discharging pipe 5 is wrapped with a heater 6, the middle part of the discharging pipe 5 is communicated with an auxiliary material filling machine 7, the bottom end of the auxiliary material filling machine 7 is provided with a quantitative valve 8, a melt modification tank 9 is fixed on the middle part of the top surface of the box-type base 1, the tail end of the discharging pipe 5 is communicated with the top end of the melt modification tank 9, one side of the bottom end of the melt modification tank 9, the standard template 12 is provided with an extrusion outlet 13, and the outlet of the continuous screw pump 10 is communicated with the feed inlet of the fixed bottom die 11.
In the embodiment, after the recycled plastic components according to the set proportion are crushed by the raw material crusher 3, is discharged to a mixing stirrer 2 through a discharge valve 4, the mixing stirrer 2 fully mixes and conveys raw material components and added auxiliary materials, after passing through the discharge pipe 5, the mixture is heated to a set temperature of one hundred and ninety degrees centigrade to two hundred degrees centigrade by a heater 6, and is melted into a fluid state, then the auxiliary material filling machine 7 adds additives such as antioxidant, brightener and stabilizer into the fluid regenerated plastic component through the quantitative valve 8, the mixture component added with the additives flows into the melting stock modification tank 9 to continue the reaction, the physical and chemical properties of the regenerated plastic component are enhanced, then continuously injecting the mixture into a fixed bottom die 11 through a continuous screw pump 10, and extruding the softened regenerated plastic strips from the fixed bottom die 11 through standard templates 12 with different specifications which are embedded with the fixed bottom die 11;
wherein, the standard template 12 is changed according to the required shape and specification so as to obtain the regenerated plastic strip which meets the required specification; the stabilizer is EVERSORB73 type stabilizer, and can perform stabilizing function on plastics such as recycled polyethylene particles, recycled polypropylene particles, polyvinyl chloride, polycarbonate, polymethyl methacrylate, thermoplastic elastomer, thermoplastic polyurethane, organic silicon modified resin, recycled polyethylene particles T and the like;
during normal operation, the heater 6 and the melt modification tank 9 need to be kept stable, and the temperature of the machine head part needs to be kept about 200 ℃, the feeding speed of the mixing stirrer 2 needs to be uniform and sufficient, the feeding speed and the heating power of the heater 6 need to be properly matched, otherwise the quality and the yield of particles can be influenced, and when the machine is stopped, the standard template 12 needs to be taken out from the fixed bottom die 11 and is independently preheated before being used for the next time.
Specifically, one side of box base 1 is fixed with coolant tank 14, rotates through the bearing among the coolant tank 14 and is connected with four guide roller 15, and equal interval is provided with annular baffle 16 on four guide roller 15, and the one end that coolant tank 14 kept away from box base 1 is equipped with finished product discharge opening 17, and one side that finished product discharge opening 17 is close to box base 1 has through bearing swing joint to pull roller set 18, and the opposite side laminating of finished product discharge opening 17 is connected with hand hay cutter 19.
In this embodiment, when the molten recycled plastic component flows out through the extrusion outlet 13, the molten recycled plastic component falls into the cooling water tank 14 under the action of gravity, and then is gradually cooled and hardened in the cooling water tank 14 to form plastic strips, the plastic strips pass through the interval of the annular partition plate 16 and then reach the traction roller set 18, and then are clamped by the traction roller set 18, and continuous discharging is realized along with the rotation of the traction roller set 18, and the plastic strips extend out through the finished product discharging holes 17 and are cut into plastic sections or plastic particles with required length by the guillotine 19 attached and connected with the finished product discharging holes 17.
Specifically, a transmission case 20 is fixed on one side of the cooling water tank 14, an input shaft of the transmission case 20 is connected with a feeding motor 21, an output shaft of the transmission case 20 is connected with a traction roller set 18, the other end of the traction roller set 18 is connected with a cam disc 22 in series, one side of the bottom end of the cooling water tank 14 is movably connected with a connecting rod 23 through a pin shaft, one end of the connecting rod 23 is movably connected with the middle part of the guillotine 19, and the side of the cam disc 22 intermittently presses and contacts the other end of the connecting rod.
In this embodiment, the feeding motor 21 drives the traction roller set 18 to rotate through the transmission case 20, when the traction roller set 18 conveys the regenerated plastic strips, the cam disc 22 coaxially connected with the traction roller set intermittently presses the other end of the connecting rod 23, the connecting rod 23 drives the guillotine 19 to intermittently attach to the finished product discharge hole 17 to lift, and the regenerated plastic strips conveyed by the traction roller set 18 are cut off to obtain the required regenerated plastic particles.
Specifically, the bottom end of the box-shaped base 1 is fixedly provided with a control unit 24, a temperature controller 25 and two frequency converters 26, the output end of the control unit 24 is electrically connected with the control ends of the temperature controller 25 and the frequency converters 26, the output end of the temperature controller 25 is electrically connected with the heater 6, and the output ends of the two frequency converters 26 are electrically connected with the continuous screw pump 10 and the feeding motor 21.
In this embodiment, the control unit 24 is a PLC controller, which is a programmable logic controller, a programmable memory designed for digital operation in industrial production, and the PLC controller stores therein instructions for executing logic operation, sequence control, timing, counting, arithmetic operation, and the like, and controls various types of machinery or production processes by digital or analog input and output, and is a core part of industrial control, the temperature controller 25 is a PY-SM5 type digital display thermostat, and the frequency converter 26 is a ZK880 type variable frequency governor; the control unit 24 controls the output power and the heating temperature of the heater 6 through a temperature controller 25, and heats the regenerated plastic according to the requirement of the mixed components of the regenerated plastic, so that the temperature is kept in the optimal fusion interval of the components of the regenerated plastic; the control unit 24 controls the progressive cavity pump 10 and the feed motor 21 via two frequency converters 26, respectively, in order to extrude the recycled plastic mixed components according to their outflow and to perform corresponding discharge and cutting adjustments according to the desired length of cut.
Specifically, a temperature measuring instrument 27 is installed at the side of the melt modification tank 9, and the temperature measuring instrument 27 is electrically connected to the input end of the control unit 24.
In this embodiment, the temperature measuring instrument 27 is an RT69 type temperature measuring instrument, and the measuring range is-50 ℃ to 450 ℃, and the measuring accuracy is 0.01 ℃, so that the temperature of the melt modification tank 9 and the component melt contained therein can be accurately measured, and the measurement result is transmitted to the control unit 24, and then the control unit 24 adjusts the heating temperature through the heater 6 according to the temperature fed back by the control unit 24.
In this embodiment, the mixer 2, the heater 6, the auxiliary material filling machine 7, the quantitative valve 8, the progressive cavity pump 10, the control unit 24, the temperature controller 25, the frequency converter 26, and the temperature measuring instrument 27 are known technologies that have been already disclosed and widely used in industrial production and daily life.
The working principle and the using process of the invention are as follows: the method comprises the steps of crushing recycled plastic components according to a set proportion by a raw material crusher 3, discharging the crushed recycled plastic components to a material mixing stirrer 2 through a material discharging valve 4, fully mixing and conveying the raw material components and added auxiliary materials by the material mixing stirrer 2, heating the obtained product to a set temperature of one hundred and ninety degrees centigrade to two hundred degrees centigrade through a material discharging pipe 5, melting the obtained product into a fluid state, adding additives such as an antioxidant, a brightener and a stabilizer into the fluid recycled plastic components by an auxiliary material filling machine 7 through a quantitative valve 8, allowing the obtained mixture with the additives to flow into a melt modification tank 9 for continuous reaction to enhance the physical and chemical properties of the recycled plastic components, continuously injecting the obtained product into a fixed bottom die 11 through a continuous screw pump 10, and extruding the recycled plastic strips in a softened state through standard templates 12 of different specifications embedded with the fixed bottom die 11, when the regenerated plastic components in a molten state flow out through the extrusion outlet 13, the regenerated plastic components fall into the cooling water tank 14 under the action of gravity, then are gradually cooled and hardened in the cooling water tank 14 to form plastic strips, the plastic strips reach the traction roller set 18 after passing through the interval of the annular partition plate 16, then are clamped by the traction roller set 18, and realize continuous discharging along with the rotation of the traction roller set 18, and the plastic strips extend out through the finished product discharging hole 17 and are cut into plastic sections or plastic particles with required length by the guillotine 19 attached and connected with the finished product discharging hole 17.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The high-transparency recycled plastic formula is characterized in that: the composite material is prepared from the following components in percentage by mass: the method comprises the steps of recovering polyethylene particles, polypropylene particles, calcium carbonate powder, graphene powder, an antioxidant, a brightening agent, a stabilizer and a plasticizer, wherein: the recycled polyethylene particles account for 60 percent of the total weight of the components, the recycled polypropylene particles account for 30 percent of the total weight of the components, the calcium carbonate accounts for 3 percent of the total weight of the components, the graphene accounts for 2 percent of the total weight of the components, the plasticizer accounts for 2 percent of the total weight of the components, the antioxidant accounts for 1 percent of the total weight of the components, the brightener accounts for 1 percent of the total weight of the components, and the stabilizer accounts for 1 percent of the total weight of the components.
2. A method for preparing a high-transparency recycled plastic according to claim 1, wherein: comprises the following steps:
s1: crushing raw materials and preparing auxiliary materials, namely crushing sixty kilograms of polyethylene reclaimed materials and thirty kilograms of polypropylene reclaimed materials into fragments or particles by using a crushing mechanism on a granulator, wherein the monomer weight of each fragment or particle is less than ten grams, and preparing two kilograms of calcium carbonate particles, two kilograms of graphene powder and two kilograms of liquid plasticizers;
s2: mixing and stirring, namely putting sixty kilograms of recycled polyethylene particle reclaimed materials and thirty kilograms of recycled polypropylene particle reclaimed materials into a stirring machine by using a stirring mechanism on a granulator for stirring and mixing, uniformly putting three kilograms of calcium carbonate particles and two kilograms of graphene powder in the stirring process, and then spraying two kilograms of plasticizer into the mixed components;
s3: heating the mixture; putting the uniformly stirred mixed component materials into a heating device on a granulator, and heating the component materials to one hundred and ninety ℃ to two hundred ℃ until the components are fully melted and mixed;
s4: adding auxiliary materials, gradually adding one kilogram of antioxidant, one kilogram of brightener and one kilogram of stabilizer into the molten component materials through an auxiliary material adding mechanism on the granulator, stirring while adding until the antioxidant, the brightener and the stabilizer are fully dissolved into the molten component materials, and then continuously keeping the temperature of the molten material mixed with the three auxiliary materials between one hundred and seventy ℃ and one hundred and ninety ℃ for eighty minutes;
s4: extruding and molding, namely injecting the molten mixed component into a shaping mold through a screw injection molding mechanism on a granulator, wherein the molten mixed component is changed into a rubber strip shape through an extrusion end of the mold, and guiding the rubber strip-shaped mixed component into a water pool to be cooled into a hard plastic strip or plastic rod;
s5: cutting, namely cutting the plastic strips into bar-shaped or granular shapes through a cutting mechanism on the granulator according to the process requirements;
s6: and (4) classifying and packaging, namely classifying, weighing and packaging the plastic particles obtained after cutting.
3. A granulator for implementing the process for the preparation of recycled plastics with high transparency according to claim 2, comprising a box-shaped base (1), characterized in that: a material mixing stirrer (2) is fixedly installed on one side of the top end of the box-type base (1), a raw material pulverizer (3) is supported on the top end of the material mixing stirrer (2) through a support, the bottom end of the raw material pulverizer (3) is communicated with a feeding port of the material mixing stirrer (2) through a material discharging valve (4), a material discharging pipe (5) is arranged on one side of the material mixing stirrer (2), a heater (6) is wrapped at the head end of the material discharging pipe (5), an auxiliary material filling machine (7) is communicated with the middle of the material discharging pipe (5), a quantitative valve (8) is arranged at the bottom end of the auxiliary material filling machine (7), a melting material modification tank (9) is fixed at the middle of the top surface of the box-type base (1), the tail end of the material discharging pipe (5) is communicated with the top end of the melting material modification tank (9), and a, the device is characterized in that a fixed bottom die (11) is arranged on the other side of the top end of the box-shaped base (1), a standard template (12) is movably embedded in the fixed bottom die (11), an extruding outlet (13) is arranged on the standard template (12), and an outlet of the continuous screw pump (10) is communicated with a feeding hole of the fixed bottom die (11).
4. The high clarity recycled plastic pelletizer of claim 3, wherein: one side of the box-type base (1) is fixed with a cooling water tank (14), the cooling water tank (14) is internally connected with four guide rotating rollers (15) in a rotating mode through bearings, the four guide rotating rollers (15) are provided with annular partition plates (16) at intervals, one end, far away from the box-type base (1), of the cooling water tank (14) is provided with a finished product discharge hole (17), one side, close to the box-type base (1), of the finished product discharge hole (17) is movably connected with a traction rotating roller set (18) through bearings, and the other side of the finished product discharge hole (17) is connected with a chopper (19) in a laminating mode.
5. The high clarity recycled plastic pelletizer of claim 4, wherein: one side of cooling water tank (14) is fixed with transmission case (20), the input shaft of transmission case (20) is connected with feeding motor (21), the output shaft of transmission case (20) pull swivel roller group (18), the other end of pulling swivel roller group (18) has concatenated cam disc (22), there is connecting rod (23) one side of cooling water tank (14) bottom through round pin axle swing joint, the one end swing joint of connecting rod (23) the middle part of hand hay cutter (19), the avris intermittent type nature pressure of cam disc (22) touches the other end of connecting rod (23).
6. A machine for producing recycled plastic with high transparency as claimed in claims 3 and 5, characterized in that: the bottom fixed mounting of box base (1) has control unit (24), temperature controller (25) and two converters (26), the output electric connection of control unit (24) the control end of temperature controller (25) and converter (26), the output electric connection of temperature controller (25) heater (6), two the output electric connection of converter (26) continuous screw pump (10) with pay-off motor (21).
7. The high clarity recycled plastic pelletizer of claim 6, wherein: a temperature measuring instrument (27) is installed on the side of the melt modification tank (9), and the temperature measuring instrument (27) is electrically connected with the input end of the control unit (24).
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| CN201911162696.7A CN110951136A (en) | 2019-11-25 | 2019-11-25 | Formula of high-transparency recycled plastic, preparation method and granulator |
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| CN201911162696.7A CN110951136A (en) | 2019-11-25 | 2019-11-25 | Formula of high-transparency recycled plastic, preparation method and granulator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633890A (en) * | 2020-06-05 | 2020-09-08 | 曹庆丽 | High polymer material founding device |
| CN112248276A (en) * | 2020-09-25 | 2021-01-22 | 深圳金藤新材料科技有限公司 | Efficient degradable plastic production process |
| CN113997451A (en) * | 2021-12-13 | 2022-02-01 | 张家港欣阳化纤有限公司 | Polyester chip granulating device for producing polyester filaments |
-
2019
- 2019-11-25 CN CN201911162696.7A patent/CN110951136A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633890A (en) * | 2020-06-05 | 2020-09-08 | 曹庆丽 | High polymer material founding device |
| CN112248276A (en) * | 2020-09-25 | 2021-01-22 | 深圳金藤新材料科技有限公司 | Efficient degradable plastic production process |
| CN113997451A (en) * | 2021-12-13 | 2022-02-01 | 张家港欣阳化纤有限公司 | Polyester chip granulating device for producing polyester filaments |
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Application publication date: 20200403 |