CN112873779A - Device and method for continuously preparing low-Mooney rebound small particle reclaimed rubber - Google Patents

Device and method for continuously preparing low-Mooney rebound small particle reclaimed rubber Download PDF

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Publication number
CN112873779A
CN112873779A CN202110273664.5A CN202110273664A CN112873779A CN 112873779 A CN112873779 A CN 112873779A CN 202110273664 A CN202110273664 A CN 202110273664A CN 112873779 A CN112873779 A CN 112873779A
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CN
China
Prior art keywords
double
screw
conveying section
mooney
reclaimed rubber
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CN202110273664.5A
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Chinese (zh)
Inventor
史金炜
王访
戈风行
汪冯新
王文才
姚修祚
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Suqian Lvjinren Rubber & Plastic Machinery Co ltd
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Suqian Lvjinren Rubber & Plastic Machinery Co ltd
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Priority to CN202110273664.5A priority Critical patent/CN112873779A/en
Publication of CN112873779A publication Critical patent/CN112873779A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/27—Cleaning; Purging; Avoiding contamination
    • B29C48/271—Cleaning; Purging; Avoiding contamination of feeding units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/275—Recovery or reuse of energy or materials
    • B29C48/276—Recovery or reuse of energy or materials of energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/287—Raw material pre-treatment while feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/763—Vent constructions, e.g. venting means avoiding melt escape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/793—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling upstream of the plasticising zone, e.g. heating in the hopper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention discloses a device and a method for continuously preparing low-Mooney rebounding small particle reclaimed rubber, and the device comprises a base, wherein a motor is arranged on one side of the top of the base, a mounting seat is arranged on the other side of the top of the base, a reduction gearbox and a double-screw extrusion mechanism are respectively arranged at the output end of the motor, the input end of the reduction gearbox is mutually connected with the double-screw extrusion mechanism, and a first extrusion conveying section, a compression refining section, a shearing refining section and a steady flow cooling conveying section are respectively arranged in the double-screw extrusion mechanism; the invention realizes the continuous automation of reclaimed rubber refining production, realizes the whole operation process in a closed environment, is environment-friendly and saves manpower; by adding the supercritical carbon dioxide fluid into the compression refining section, the Mooney viscosity of the desulfurized rubber powder is greatly reduced, and the cross-linked network destroyed by homogenization is homogenized.

Description

Device and method for continuously preparing low-Mooney rebound small particle reclaimed rubber
Technical Field
The invention relates to the technical field of reclaimed rubber, in particular to a device and a method for continuously preparing low-Mooney rebound small-particle reclaimed rubber.
Background
The reclaimed rubber is always a main mode for recycling the waste rubber in China, on one hand, the dependence on external rubber resources can be reduced, on the other hand, the problem of black pollution caused by waste tire manufacturing can be effectively solved, the yield of the waste rubber tires in China is about 3 hundred million in 2015, the weight of the waste rubber tires is over 1000 million tons, the preparation process of the reclaimed rubber is divided into a desulfurization stage and a refining stage of rubber powder, the desulfurization stage is a process of selectively disconnecting S-S bonds or C-S bonds from the rubber powder, and the prepared desulfurized rubber powder has certain use value, but the processing fluidity is too poor, and the mechanical properties, particularly the elongation at break, are not good, so that the desulfurized rubber powder needs to be further subjected to strong shearing and thinning to reduce the Mooney, the obtained reclaimed rubber is ensured to have good mechanical properties and processing fluidity, and the refining stage has very important significance for the preparation of the reclaimed rubber;
the refining extruder needs to perform strong shearing to finish the process of refining and Mooney reduction of the desulfurized rubber powder, and the prepared reclaimed rubber has good mechanical property and processing fluidity, but the refining extrusion process has many problems at present: if the extrusion temperature of the reclaimed rubber particles is over-high, about 100-120 ℃, the particle size is too large, heat is not easy to dissipate, and the particles are adhered and agglomerated; the particle reclaimed rubber with Mooney viscosity lower than 60 is difficult to prepare, the reclaimed rubber has the unique visco-elastic response of rubber materials, and tends to viscous response when the temperature is higher, so the particle reclaimed rubber extruded at the overhigh temperature is easy to adhere to the surface of subsequent cooling and conveying equipment, large-scale adhesion agglomeration also occurs among reclaimed rubber particles, both of the particle reclaimed rubber and the reclaimed rubber can influence the cooling, conveying and packaging of the particle reclaimed rubber and even block related equipment, and the reclaimed rubber belongs to a poor thermal conductor, during the feeding process of the desulfurized rubber powder, the heat dissipation effect of the particle reclaimed rubber can be further influenced by the overlarge particle size, the particles can be easily adhered together to cause the blockage of a feed port, the subsequent heating treatment takes a long time, the problems of particle reclaimed rubber adhesion agglomeration and the like are aggravated, and when the isolating agent is added, the powder of the isolating agent is easily adhered to the inner wall of the feed port in a, the normal conveying function of the isolating agent is influenced, when a heat source in the device overflows, the isolating agent is not easy to remove, and the directly discharged heat source can cause mixing to the working environment, so that the air quality of the surrounding environment is influenced.
Disclosure of Invention
The invention aims to provide a device and a method for continuously preparing low-Mooney rebound small particle reclaimed rubber so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the device comprises a base, wherein a motor is arranged on one side of the top of the base, a mounting seat is arranged on the other side of the top of the base, a reduction gearbox and a double-screw extrusion mechanism are respectively arranged at the output end of the motor, the input end of the reduction gearbox is mutually connected with the double-screw extrusion mechanism, a first extrusion conveying section, a compression refining section, a shearing refining section and a steady flow cooling conveying section are respectively arranged in the double-screw extrusion mechanism, a toothed disc is arranged on one side of the outer side of the double-screw extrusion mechanism, a rotary cutter is arranged on one side of the shearing refining section, a control console is arranged on one side of the top of the base, which is close to the motor, a diversion trench mutually communicated with the steady flow cooling conveying section is arranged at the top of the inside of the mounting seat, an electric gate valve is arranged on one side of the diversion trench, an, a feeding groove which is communicated with each other is formed in one side of the top of the double-screw extrusion mechanism, the air guide pipe extends into the feeding groove, a carbon dioxide storage tank is arranged at the middle position of the top of the base, injection pumps which are communicated with each other are arranged at the bottom of the compression refining section, the injection pumps are communicated with the carbon dioxide storage tank, a preheating and scattering assembly is arranged at the middle position of the bottom of the inner part of the feeding groove, a quantitative feeding assembly is arranged at one side of the top of the double-screw extrusion mechanism, and a temperature control system is arranged at the middle position of the top of the outer side of the double;
the preheating and scattering assembly is characterized in that a flow through groove is arranged at the middle position of the bottom inside the preheating and scattering assembly, a servo motor is arranged at the top of the flow through groove, a rotating rod is arranged at the output end of the servo motor, a driving gear is arranged at the bottom of the outer side of the rotating rod, a threaded column is sleeved at one side, close to the rotating rod, of the bottom inside the flow through groove, a driven gear meshed with the driving gear is arranged at the bottom of the outer side of the threaded column, a gear is arranged at the top of the outer side of the threaded column, inner threaded sleeves matched with each other are arranged on the outer side of the threaded column, rotating rings matched with each other are arranged on the outer side of the rotating rods, an annular electric heating wire is arranged on the outer side of each rotating ring, a pulley block is arranged on one side of each inner threaded sleeve, an annular sliding groove is arranged, the four corners of the bottom of the inner side of the desulfurized rubber powder inlet are provided with connecting plates, the semi-arc-shaped guide seat is connected with the connecting plates, the edge of the bottom of the semi-arc-shaped guide seat is provided with an inner gear ring which is meshed with a gear, and the top of the semi-arc-shaped guide seat is provided with a stirring rod;
one side at ration pay-off subassembly top is equipped with the reinforced mechanism of separant, the top of the reinforced mechanism of separant is equipped with the feed inlet of mutual intercommunication, the intermediate position department of the positive one end of feed inlet is equipped with driving motor, driving motor's output extends to the inside of feed inlet and is equipped with the installation roller, the four corners department in the installation roller outside is equipped with brush board and indent respectively and decides the silo, one side of the reinforced mechanism bottom of separant is equipped with the nozzle of mutual intercommunication, the control cabinet passes through the wire and is connected with motor, aspiration pump, electronic push-pull valve, infusion pump, annular electric heating wire, servo motor and driving motor electricity respectively.
Preferably, the two sides of the top of the feed inlet are provided with internal thread fixing blocks, the inner sides of the internal thread fixing blocks are provided with threaded rods which are mutually matched, and one sides of the threaded rods, which are mutually close, are provided with arc-shaped clamping plates.
Preferably, the inner side of the rotating ring is provided with a hollow annular guide groove which is in sliding fit with the pulley block, the top and the bottom of the outer side of the rotating ring are connected with the internal thread sleeve, and the outer side of the flow through groove is uniformly provided with flow guide holes in rows.
Preferably, the top of feed chute one side is equipped with the gas vent, the top of feed chute opposite side is equipped with the air inlet, and air inlet and air duct intercommunication each other, the edge of the inside bottom of feed chute is equipped with annular feed opening, the top in the desulfurization rubber powder import outside is equipped with the expansion and connects the material mouth.
Preferably, the bottom of the steady flow cooling conveying section is provided with a through groove, the through groove is matched with the electric gate valve, the top of the steady flow cooling conveying section is provided with a communicating port, and the communicating port is matched with the nozzle.
Preferably, the two ends of the two sides in the feed inlet are provided with arc-shaped guide plates, and the brush plates are attached to the inner wall of the feed inlet.
Preferably, the double-screw extrusion mechanism is formed by connecting a co-rotating double-screw structure, the double-screw extrusion mechanism adopts a full-meshing double-screw extruder, a cylinder of the extruder is provided with a desulfurized rubber powder inlet, a carbon dioxide gas injection port, an isolating agent feeding port and a particle reclaimed rubber outlet, a jacket is arranged on the outer side of the cylinder of the double-screw extrusion mechanism, a cylinder water inlet and a cylinder water outlet are formed in the jacket, and a thermocouple is connected to the outer wall of the cylinder.
Preferably, the driving motor adopts a continuous and stable air pressure type powder spraying structure to be communicated and matched with the isolating agent feeding mechanism.
A device and a method for continuously preparing low-viscosity small-particle reclaimed rubber are provided, wherein desulfurized rubber powder with Mooney viscosity of 120 plus 200, which completes a desulfurization procedure, enters a co-rotating twin-screw refining extruder through a feeding device, the temperature of a first extrusion conveying section is controlled to be 15-45 ℃, the temperature of a compression refining section is controlled to be 80-120 ℃, the pressure is 7.0-11.0Mpa, the temperature of a shearing refining section is 15-25 ℃, the pressure is 2.0-5.0Mpa, the temperature of a steady flow cooling conveying section is 8-12 ℃, carbon dioxide fluid with the mass ratio of 0.05-1.0% is added into the compression refining section of the extruder under the matching of a carbon dioxide storage tank and an injection pump to enable the compression refining section to be in a supercritical carbon dioxide state, 0.2-2% of isolating agent is added into the steady flow cooling conveying section of the extruder, the rotating speed of a screw is controlled to react for 1-4 minutes at 200rpm of 100 plus, extruding the mixture by an extruder head to obtain the small-particle reclaimed rubber with the Mooney viscosity of less than 60, the temperature of which is 30-60 ℃, the particle diameter of which is 5-30 mm.
The use method of the device for continuously preparing the low-Mooney rebound small particle reclaimed rubber comprises the following use steps:
step one; when the device is used, a control console is utilized to respectively start a motor, an air suction pump, an electric gate valve, an injection pump, an annular electric heating wire, a servo motor and a driving motor, firstly, the desulfurized rubber powder enters a full-meshing co-rotating twin-screw refining extruder through a feeding groove, the servo motor is started to drive a rotating rod to rotate in the period, a driving gear and a driven gear are driven to be meshed with each other along with the rotation of the rotating rod to force a threaded column and a gear to rotate simultaneously, the gear is driven to be meshed with an inner gear ring, the inner gear ring is forced to drive a semi-arc-shaped flow guide seat, a desulfurized rubber powder inlet and a stirring rod to rotate under the guiding sliding of a sliding block and the annular sliding groove, the entering desulfurized rubber powder is scattered and stirred by the rotation of the stirring rod, and the scattered rubber powder enters the feeding groove under the;
step two; when the scattered desulfurization rubber powder enters the feeding chute, the rotating rod rotates to drive the rotating ring to integrally rotate under the guidance of the rotating ring and the pulley block, so that the annular electric heating wire heats the inside of the through-flow chute, heated gas flows outwards, and the internal thread sleeve and the pulley block are driven to ascend along with the rotation of the threaded column, so that the annular electric heating wire can reciprocate and rotate to heat, and the desulfurization rubber powder falling in the feeding chute is preheated;
step three; when the rubber powder that gets into first extrusion transport section along with preheating, pass first extrusion transport section after the temperature control system temperature control in proper order, the compression refining section, it forms the reclaimed rubber to cut the section of refining and stationary flow cooling transport section, during through stationary flow cooling transport section, it is rotatory wholly to decide the silo with the indent through driving motor drive installation roller, utilize the indent to decide the silo and carry out the ration to the talcum powder of whereabouts and receive, and utilize the laminating contact of brush board and feed inlet inner wall, prevent the talcum powder adhesion at the feed inlet wall, can send into the nozzle under the cooperation of the reinforced mechanism of isolating agent with the talcum powder is orderly and carry out vapour-pressure type powder spraying work.
Step four; when the device is too large to be discharged easily due to accumulation of heat sources in the double-screw extrusion mechanism, the electric gate valve can be started to open the steady-flow cooling conveying section for ventilation, the air pump is communicated with the flow guide groove in a flow guide mode, gas in the steady-flow cooling conveying section and the double-screw extrusion mechanism is pumped out, the gas is guided into the feeding groove from the gas guide pipe, waste heat utilization is formed, excessive heat sources are covered on the desulfurized rubber powder which falls again for heating, and continuous low-Mooney regenerated rubber production work is carried out.
Compared with the prior art, the invention provides a device for continuously preparing low-Mooney rebounding small-particle reclaimed rubber, which has the following beneficial effects:
1. the invention is a refining stage in the reclaimed rubber production process, realizes continuous automation of reclaimed rubber refining production, realizes the whole operation process in a closed environment, is environment-friendly and saves manpower; by adding the supercritical carbon dioxide fluid into the compression refining section, the Mooney viscosity of the desulfurized rubber powder is greatly reduced, and the cross-linked network destroyed by homogenization is homogenized, in addition, the torque of an extruder is reduced, and the equipment manufacturing difficulty and the use energy consumption are greatly reduced; the network of the regenerated rubber is further homogenized under the action of the shearing thinning section, so that the product performance is ensured, and the Mooney viscosity rebound in the later storage process is reduced; in addition, through the specially designed screw size, the configuration and the combination of the thread elements, the prepared reclaimed rubber has low Mooney, low extrusion temperature, small particles, easy heat dissipation, no adhesion and easy packaging and transportation, and finally realizes the preparation of reclaimed rubber with low Mooney viscosity, small particles and small Mooney viscosity rebound in the storage process.
2. According to the invention, the mutual cooperation of the preheating and scattering components is utilized to promote the conveyed desulfurization rubber powder to be stirred and scattered during feeding, so that the blockage at the feeding position is prevented, meanwhile, the heating source is filled in the feeding groove through the heating structure which is capable of reciprocating, lifting and rotating of the annular electric heating wire, the falling desulfurization rubber powder is preheated, the subsequent temperature controllable effect is improved, the production efficiency of the reclaimed rubber is enhanced, the excess heat source in the steady flow cooling conveying section is absorbed by utilizing the control of the air pump and is guided into the feeding groove through the air guide pipe, the waste heat utilization is formed, the continuous processing functionality of the device and the preheating frequency of the desulfurization rubber powder are further enhanced, and the practical value of the device is improved.
3. The invention can intermittently receive and discharge the falling isolating agent by matching the quantitative feeding components, and the rotation of the mounting roller drives the brush plate to intermittently brush the inner wall of the feeding hole, so that powder is prevented from being adhered to the inner wall of the feeding hole, and the addition of the powder spraying device ensures that the small-particle reclaimed rubber is not agglomerated and is easier to dissipate heat.
Drawings
FIG. 1 is a front cross-sectional view of the present invention;
FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 3 is an enlarged view of FIG. 1 at B according to the present invention;
FIG. 4 is a perspective view of a devulcanized rubber powder inlet of the present invention;
FIG. 5 is a perspective view of a semi-arcuate deflector base of the present invention;
FIG. 6 is a top cross-sectional view of a swivel of the present invention;
FIG. 7 is a top cross-sectional view of a feed inlet of the present invention.
In the figure: 1. a motor; 2. a reduction gearbox; 3. a feed chute; 4. a double screw extrusion mechanism; 5. an air duct; 6. a temperature control system; 7. a toothed disc; 8. rotating the cutter; 9. a steady flow cooling delivery segment; 10. a mounting seat; 11. a diversion trench; 12. an air pump; 13. an electric gate valve; 14. shearing and thinning the sections; 15. compressing the refining section; 16. an injection pump; 17. a carbon dioxide storage tank; 18. a first extrusion conveying section; 19. a console; 20. a base; 21. a flow through groove; 211. an annular electric heating wire; 212. rotating the ring; 213. a driving gear; 214. a rotating rod; 215. a driven gear; 216. a threaded post; 217. an internally threaded sleeve; 218. a servo motor; 219. a semi-arc shaped flow guide seat; 2110. a desulfurized rubber powder inlet; 2111. an annular chute; 2112. a slider; 2113. a stirring rod; 2114. a connecting plate; 2115. a pulley block; 2116. a gear; 2117. an inner gear ring; 22. a release agent feeding mechanism; 221. brushing the board; 222. mounting a roller; 223. an inward concave fixed trough; 224. a feed inlet; 225. a nozzle; 226. the motor is driven.
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.
Referring to fig. 1-7, the present invention provides a technical solution: a device for continuously preparing low-Mooney rebounding small particle reclaimed rubber comprises a base 20, wherein a motor 1 is arranged on one side of the top of the base 20, a mounting seat 10 is arranged on the other side of the top of the base 20, a reduction gearbox 2 and a double-screw extrusion mechanism 4 are respectively arranged at the output end of the motor 1, the input end of the reduction gearbox 2 is mutually connected with the double-screw extrusion mechanism 4, a first extrusion conveying section 18, a compression refining section 15, a shearing refining section 14 and a steady flow cooling conveying section 9 are respectively arranged in the double-screw extrusion mechanism 4, a toothed disc 7 is arranged on one side of the outer side of the double-screw extrusion mechanism 4, a rotary cutter 8 is arranged on one side of the shearing refining section 14, a control console 19 is arranged on one side of the top of the base 20 close to the motor 1, a flow guide groove 11 mutually communicated with the steady flow cooling conveying section 9 is arranged on the top of the inside of the mounting seat 10, the output end of the air pump 12 is provided with air guide pipes 5 which are communicated with each other, one side of the top of the double-screw extrusion mechanism 4 is provided with a feeding groove 3 which is communicated with each other, the air guide pipes 5 extend into the feeding groove 3, the middle position of the top of the base 20 is provided with a carbon dioxide storage tank 17, the bottom of the compression refining section 15 is provided with an injection pump 16 which is communicated with each other, the injection pump 16 is communicated with the carbon dioxide storage tank 17, the middle position of the bottom inside the feeding groove 3 is provided with a preheating scattering component, one side of the top of the double-screw extrusion mechanism 4 is provided with a quantitative feeding component, and the middle position of the top outside the double;
a flow through groove 21 is arranged at the middle position of the bottom inside the preheating and scattering assembly, a servo motor 218 is arranged at the top of the flow through groove 21, a rotating rod 214 is arranged at the output end of the servo motor 218, a driving gear 213 is arranged at the bottom outside the rotating rod 214, a threaded column 216 is sleeved at one side, close to the rotating rod 214, of the bottom inside the flow through groove 21, a driven gear 215 meshed with the driving gear 213 is arranged at the bottom outside the threaded column 216, a gear 2116 is arranged at the top outside the threaded column 216, an internally threaded sleeve 217 matched with each other is arranged at the outside of the threaded column 216, a rotating ring 212 matched with each other is arranged at the outside of the rotating rod 214, an annular electric heating wire 211 is arranged at the outside of the rotating ring 212, a pulley block 2115 is arranged at one side of the internally threaded sleeve 217, an annular chute 2111 is arranged at the edge of the top of a feed chute 3, sliders 2112 are symmetrically, connecting plates 2114 are arranged at four corners of the bottom of the inner side of the desulfurized rubber powder inlet 2110, the semi-arc guide seat 219 is connected with the connecting plates 2114, an inner gear ring 2117 meshed with the gear 2116 is arranged at the edge of the bottom of the semi-arc guide seat 219, and a stirring rod 2113 is arranged at the top of the semi-arc guide seat 219;
the device comprises a quantitative feeding assembly, an isolating agent feeding mechanism 22, a feeding hole 224, a driving motor 226, a mounting roller 222, a brush plate 221 and a concave material fixing groove 223, wherein the isolating agent feeding mechanism 22 is arranged on one side of the top of the quantitative feeding assembly, the feeding hole 224 is communicated with the top of the isolating agent feeding mechanism 22, the driving motor 226 is arranged in the middle of one end of the front face of the feeding hole 224, the output end of the driving motor 226 extends into the feeding hole 224 and is provided with the mounting roller 222, four corners of the outer side of the mounting roller 222 are respectively provided with the brush plate 221 and the concave material fixing groove 223, a nozzle 225 is communicated with the isolating agent feeding mechanism 22, and a control console 19 is respectively electrically connected with a motor 1.
As a preferable embodiment of the present embodiment: the both sides at feed inlet 224 top are equipped with the internal thread fixed block, and the inboard of internal thread fixed block is equipped with the threaded rod of mutual adaptation, and one side that the threaded rod is close to each other is equipped with the arc grip block, and the bagging-off or the box centre gripping of being convenient for to the powder is fixed, improves the stability of material whereabouts.
As a preferable embodiment of the present embodiment: the inner side of the rotating ring 212 is provided with a hollow annular guide groove which is in sliding fit with the pulley block 2115, the moving fixed point of the device is increased, the top and the bottom of the outer side of the rotating ring 212 are connected with the internal thread sleeve 217, and the outer side of the flow through groove 21 is uniformly provided with flow guide holes, so that formed hot air can be conveniently discharged.
As a preferable embodiment of the present embodiment: the top of 3 one sides of feed chute is equipped with the gas vent, and the top of 3 opposite sides of feed chute is equipped with the air inlet, and air inlet and 5 mutual intercommunications of air duct, and the edge of the inside bottom of feed chute 3 is equipped with annular feed opening, is convenient for carry the material, and the top in the desulfurization rubber powder import 2110 outside is equipped with the expansion and connects the material mouth, increases the feeding range of material.
As a preferable embodiment of the present embodiment: the inside bottom of stationary flow cooling conveying section 9 is equipped with logical groove, and leads to groove and the mutual adaptation of electronic push-pull valve 13, and the inside top of stationary flow cooling conveying section 9 is equipped with the intercommunication mouth, and the mutual adaptation of intercommunication mouth and nozzle 225, and the parts of being convenient for communicate the cooperation each other.
As a preferable embodiment of the present embodiment: arc-shaped guide plates are arranged at two ends of two sides inside the feed port 224, and the brush plates 221 are attached to the inner wall of the feed port 224, so that the inner wall of the component can be automatically brushed conveniently, and the convenience of subsequent cleaning work is improved.
As a preferable embodiment of the present embodiment: the double-screw extrusion mechanism 4 is formed by connecting a homodromous double-screw structure, the double-screw extrusion mechanism 4 adopts a full-meshing double-screw extruder, a devulcanized rubber powder inlet is formed in a machine barrel of the extruder, a carbon dioxide gas injection port, an isolating agent feeding port and a particle reclaimed rubber outlet are formed in the machine barrel of the extruder, a jacket is arranged on the outer side of the machine barrel of the double-screw extrusion mechanism 4, a machine barrel water inlet, a water outlet and a thermocouple are formed in the outer wall of the machine barrel, and the device and each part are convenient.
As a preferable embodiment of the present embodiment: the driving motor 226 adopts a continuous and stable pneumatic powder spraying structure to be communicated and matched with the separant feeding mechanism 22, so that the powder can be sprayed and mixed conveniently.
A device and a method for continuously preparing low-viscosity small-particle reclaimed rubber are provided, wherein desulfurized rubber powder with Mooney viscosity of 120-200, which completes a desulfurization procedure, enters a co-rotating twin-screw refining extruder through a feeding device, the temperature of a first extrusion conveying section 18 is controlled to be 15-45 ℃, the temperature of a compression refining section 15 is controlled to be 80-120 ℃, the pressure is 7.0-11.0Mpa, the temperature of a shear refining section 14 is 15-25 ℃, the pressure is 2.0-5.0Mpa, the temperature of a steady flow cooling conveying section 9 is 8-12 ℃, carbon dioxide fluid with the mass ratio of 0.05-1.0 percent is added into the compression refining section 15 of the extruder under the matching of a carbon dioxide storage tank 17 and an injection pump 16 to enable the compression refining section to be in a supercritical carbon dioxide state, 0.2-2 percent of a separant is added into the steady flow cooling conveying section 9 of the extruder, the rotating speed of the screws is controlled to react at 200rpm of 100 for 1-4 minutes, extruding the mixture by an extruder head to obtain the small-particle reclaimed rubber with the Mooney viscosity of less than 60, the temperature of which is 30-60 ℃, the particle diameter of which is 5-30 mm.
In the embodiment 1, the desulfurized rubber powder with Mooney viscosity of 180 enters the full-meshing co-rotating twin-screw extrusion mechanism 4 through the feeding device, the temperature of the first extrusion conveying section 18 is controlled to be 25 ℃, the screw element is a combination of a conveying element and a meshing element, and the depth of a screw groove is 20 mm; controlling the temperature of a compression refining section 15 to be 100 ℃, the pressure to be 8.0Mpa, a threaded element to be an engagement block, the depth of a screw groove to be 10mm, the temperature of a shearing refining section 14 to be 15 ℃, the pressure to be 2.0Mpa, the temperature of a steady flow cooling conveying section 9 to be 10 ℃, the threaded element to be a combination of a conveying original piece and a tooth-shaped disc 7, the depth of the screw groove to be 5mm, and the tail end to be the tooth-shaped disc 7, adding 0.05% of carbon dioxide fluid in mass proportion into the compression refining section 15 of an extruder to enable the screw groove to be in a supercritical carbon dioxide state, adding 1.5% of talcum powder isolating agent into the steady flow cooling conveying section 9 of the extruder, controlling the rotating speed of a screw to be 150rpm, reacting for 2 minutes, and extruding and preparing small-particle reclaimed rubber with the temperature of 40 ℃ and the particle diameter of 10 mm;
the properties of the reclaimed rubber are as follows: mooney viscosity = 40; according to a vulcanization formula of GB/T13460-: the tensile strength =15.3Mpa, the elongation at break =520%, the mooney viscosity rebounds 3 after the regenerated rubber is parked for 10 days, and the mooney viscosity rebounds 7 after the regenerated rubber is parked for one month.
Example 2, the desulfurized rubber powder with Mooney viscosity of 200 enters a full-mesh co-rotating twin-screw extrusion mechanism 4 through a feeding device, the temperature of a first extrusion conveying section 18 is controlled to be 20 ℃, a screw element is a conveying element, the depth of a screw groove is 15mm, the temperature of a compression refining section 15 is controlled to be 120 ℃, the pressure is 10.0MPa, the screw element is a meshing block, the depth of the screw groove is 8mm, the temperature of a shearing refining section 14 is 25 ℃, the pressure is 3.0MPa, the temperature of a steady flow cooling conveying section 9 is 8 ℃, the screw element is a combination of a conveying element and a toothed disc 7, the depth of the screw groove is 7mm, the tail end is the toothed disc 7, carbon dioxide fluid with the mass ratio of 1.5% is added into the compression refining section 15 of the extruder to enable the extrusion to be in a supercritical carbon dioxide state, and 0.5% of calcium powder and carbon black are used as isolating agents and are added into the steady flow cooling conveying section 9 of the extruder, controlling the rotation speed of the screw to react for 2.5 minutes at 100rpm, and extruding by an extruder head to prepare small-particle reclaimed rubber with the temperature of 35 ℃ and the particle diameter of 15 mm; the properties of the reclaimed rubber are as follows: mooney viscosity = 45; according to a vulcanization formula of GB/T13460-: the tensile strength =15.8Mpa, the elongation at break =550%, the mooney viscosity rebounds 2 after the regenerated rubber is parked for 10 days, and the mooney viscosity rebounds 6 after one mooney is parked; the properties of the reclaimed rubber are as follows: mooney viscosity = 45; according to a vulcanization formula of GB/T13460-: the tensile strength =15.8Mpa, the elongation at break =550%, the mooney viscosity rebounds 2 after the reclaimed rubber is parked for 10 days, and the mooney viscosity rebounds 6 after the reclaimed rubber is parked for one mooney.
The use method of the device for continuously preparing the low-Mooney rebound small particle reclaimed rubber comprises the following use steps:
step one; when the device is used, the control console 19 is used for respectively starting the motor 1, the air suction pump 12, the electric gate valve 13, the injection pump 16, the annular electric heating wire 211, the servo motor 218 and the driving motor 226, firstly, the desulfurized rubber powder enters the full-meshed co-rotating twin-screw refining extruder through the feeding chute 3, during the period, the starting of the servo motor 218 is used for driving the rotating rod 214 to rotate, the driving gear 213 and the driven gear 215 are driven to be mutually meshed along with the rotation of the rotating rod 214 to force the threaded column 216 and the gear 2116 to rotate simultaneously, the rotation of the gear 2116 is mutually meshed with the inner gear 2117 to force the inner gear 2117 to drive the semi-arc-shaped guide seat 219, the desulfurized rubber powder inlet 2110 and the stirring rod 2113 to rotate under the guiding sliding of the sliding block 211, the entering desulfurized rubber powder is scattered and stirred by the rotation of the stirring rod 2113, and the scattered rubber powder enters the feed chute 3 under the flow guidance of the semi-arc-shaped flow guide seat 219 for preheating;
step two; when the scattered desulfurized rubber powder enters the feeding chute 3, the rotating rod 214 rotates to drive the rotating ring 212 to integrally rotate under the guidance of the pulley block 2115, so that the annular electric heating wire 211 heats the through-flow chute 21 and the heated gas flows outwards, and simultaneously the threaded column 216 rotates to drive the internal threaded sleeve 217 and the pulley block 2115 to ascend, so that the annular electric heating wire 211 can perform reciprocating lifting and rotary heating work, and the desulfurized rubber powder falling in the feeding chute 3 is enabled to be preheated;
step three; when preheated rubber powder enters the first extrusion conveying section 18, the preheated rubber powder sequentially passes through the first extrusion conveying section 18, the compression refining section 15, the shearing refining section 14 and the steady-flow cooling conveying section 9 after temperature control of the temperature control system 6 to form regenerated rubber, during the process, when the rubber powder passes through the steady-flow cooling conveying section 9, the mounting roller 222 and the concave fixed trough 223 are driven by the driving motor 226 to integrally rotate, the concave fixed trough 223 is used for quantitatively receiving falling talcum powder, the brush plate 221 is in contact with the inner wall of the feed port 224 in an attaching mode, the talcum powder is prevented from being adhered to the wall surface of the feed port 224, and the talcum powder can be sequentially fed into the nozzle 225 under the cooperation of the isolating agent feeding mechanism 22 to perform pneumatic powder spraying work;
step four; when the device is too large to be discharged easily due to accumulation of heat sources in the double-screw extrusion mechanism 4, the electric gate valve 13 can be started to open the steady-flow cooling conveying section 9 for ventilation, the air in the steady-flow cooling conveying section 9 and the double-screw extrusion mechanism 4 is pumped out by utilizing the flow guide communication of the air suction pump 12 and the flow guide groove 11, the air is guided into the feeding groove 3 from the air guide pipe 5 to form waste heat utilization, the overflowed heat sources are covered on the desulfurized rubber powder which falls again for heating, and continuous low-Mooney regenerated rubber production work is carried out.
In summary, the following steps: the device mainly comprises a full-meshed co-rotating double-screw refining extruder, a carbon dioxide gas injection device and a continuous and stable air pressure type powder spraying device, the process of greatly reducing and refining the Mooney viscosity of the desulfurized rubber powder is completed by desulfurized rubber powder with Mooney viscosity of 120-200 in a desulfurization process under the action of pressure, shearing, mixing and temperature of the co-rotating double-screw refining extruder, and small-particle reclaimed rubber with the temperature of 30-60 ℃ and the Mooney viscosity of 5-30 mm in particle diameter of less than 60 is obtained by extrusion preparation through screw size, screw element combination, the powder spraying device and process control, so that the production efficiency of the device for the low Mooney reclaimed rubber and the practical value of the device are greatly improved.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A device for continuously preparing low-Mooney rebound small particle reclaimed rubber comprises a base (20), and is characterized in that: a motor (1) is arranged on one side of the top of the base (20), a mounting seat (10) is arranged on the other side of the top of the base (20), a reduction gearbox (2) and a double-screw extrusion mechanism (4) are respectively arranged at the output end of the motor (1), the input end of the reduction gearbox (2) is connected with the double-screw extrusion mechanism (4), a first extrusion conveying section (18), a compression refining section (15), a shearing refining section (14) and a steady flow cooling conveying section (9) are respectively arranged in the double-screw extrusion mechanism (4), a toothed disc (7) is arranged on one side of the outer side of the double-screw extrusion mechanism (4), a rotary cutter (8) is arranged on one side of the shearing refining section (14), a control console (19) is arranged on one side of the top of the base (20) close to the motor (1), and a flow guide groove (11) communicated with the steady flow cooling conveying section (9) is arranged on the top, one side of the diversion trench (11) is provided with an electric gate valve (13), the bottom of the diversion trench (11) is provided with an air pump (12) which are communicated with each other, the output end of the air pump (12) is provided with air ducts (5) which are communicated with each other, one side of the top of the double-screw extrusion mechanism (4) is provided with a feeding groove (3) which is communicated with each other, the gas guide pipe (5) extends into the feeding groove (3), a carbon dioxide storage tank (17) is arranged in the middle of the top of the base (20), the bottom of the compression refining section (15) is provided with an injection pump (16) which is communicated with each other, the injection pump (16) is communicated with the carbon dioxide storage tank (17), a preheating and scattering assembly is arranged in the middle of the bottom inside the feed chute (3), a quantitative feeding component is arranged on one side of the top of the double-screw extrusion mechanism (4), and a temperature control system (6) is arranged in the middle of the top of the outer side of the double-screw extrusion mechanism (4);
the middle position department of the inside bottom of subassembly is broken up in preheating is equipped with logical chute (21), the top that leads to chute (21) is equipped with servo motor (218), the output of servo motor (218) is equipped with bull stick (214), the bottom in bull stick (214) outside is equipped with driving gear (213), one side cover that the inside bottom of logical chute (21) is close to bull stick (214) is equipped with screw thread post (216), the bottom in the screw thread post (216) outside is equipped with driven gear (215) with driving gear (213) intermeshing, the top in the screw thread post (216) outside is equipped with gear (2116), the outside of screw thread post (216) is equipped with the internal thread sleeve pipe (217) of mutual adaptation, the outside of bull stick (214) is equipped with swivel (212) of mutually supporting, the outside of swivel (212) is equipped with annular electric heating wire (211), one side of internal thread sleeve pipe (217) is equipped with assembly pulley (2115), an annular chute (2111) is arranged at the edge of the top of the feed chute (3), sliders (2112) are symmetrically arranged on the inner side of the annular chute (2111), mutually connected desulfurized rubber powder inlets (2110) are arranged on one sides of two groups of sliders (2112) close to each other, connecting plates (2114) are arranged at four corners of the bottom of the inner side of each desulfurized rubber powder inlet (2110), a semi-arc-shaped guide seat (219) is mutually connected with the connecting plates (2114), an inner gear ring (2117) meshed with a gear (2116) is arranged at the edge of the bottom of the semi-arc-shaped guide seat (219), and a stirring rod (2113) is arranged at the top of the semi-arc-shaped guide seat (219);
one side at ration pay-off subassembly top is equipped with isolating agent feeding mechanism (22), the top of isolating agent feeding mechanism (22) is equipped with feed inlet (224) that communicates each other, the intermediate position department of the positive one end of feed inlet (224) is equipped with driving motor (226), the output of driving motor (226) extends to the inside of feed inlet (224) and is equipped with installation roller (222), the four corners department in installation roller (222) outside is equipped with brush board (221) and indent surely silo (223) respectively, one side of isolating agent feeding mechanism (22) bottom is equipped with nozzle (225) that communicate each other, control cabinet (19) are connected with motor (1), aspiration pump (12), electronic push-pull valve (13), injection pump (16), annular electric heating wire (211), servo motor (218) and driving motor (226) electricity respectively through the wire.
2. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the two sides of the top of the feed port (224) are provided with internal thread fixing blocks, the inner sides of the internal thread fixing blocks are provided with threaded rods which are mutually matched, and one sides of the threaded rods, which are mutually close, are provided with arc-shaped clamping plates.
3. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the inner side of the rotating ring (212) is provided with a hollow annular guide groove, the hollow annular guide groove is in sliding fit with the pulley block (2115), the top and the bottom of the outer side of the rotating ring (212) are connected with the internal thread sleeve (217), and the outer side of the flow through groove (21) is uniformly provided with flow guide holes in rows.
4. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the top of feed chute (3) one side is equipped with the gas vent, the top of feed chute (3) opposite side is equipped with the air inlet, and air inlet and air duct (5) intercommunication each other, the edge of the inside bottom of feed chute (3) is equipped with annular feed opening, the top in the desulfurization rubber powder import (2110) outside is equipped with the expansion and connects the material mouth.
5. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the bottom of the interior of the steady flow cooling conveying section (9) is provided with a through groove, the through groove is matched with the electric gate valve (13), the top of the interior of the steady flow cooling conveying section (9) is provided with a communicating opening, and the communicating opening is matched with the nozzle (225).
6. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the both ends of the inside both sides of feed inlet (224) are equipped with arc guide plate, the inner wall of brush board (221) and feed inlet (224) is laminated each other.
7. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the double-screw extrusion mechanism (4) is formed by connecting a co-rotating double-screw structure, the double-screw extrusion mechanism (4) adopts a full-meshing double-screw extruder, a cylinder of the extruder is provided with a desulfurized rubber powder inlet, a carbon dioxide gas injection port, an isolating agent feeding port and a particle regenerated rubber outlet, the outer side of the cylinder of the double-screw extrusion mechanism (4) is provided with a jacket, the jacket is provided with a cylinder water inlet and a water outlet, and the outer wall of the cylinder is connected with a thermocouple.
8. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the driving motor (226) adopts a continuous and stable air pressure type powder spraying structure to be communicated and matched with the isolating agent feeding mechanism (22).
9. A device and a method for continuously preparing low-viscosity small-particle reclaimed rubber are characterized in that: the desulfurized rubber powder with Mooney viscosity of 120-200 for completing the desulfurization procedure enters a co-rotating twin-screw refining extruder through a feeding device, the temperature of a first extrusion conveying section (18) is controlled to be 15-45 ℃, the temperature of a compression refining section (15) is controlled to be 80-120 ℃, the pressure is 7.0-11.0MPa, the temperature of a shear refining section (14) is controlled to be 15-25 ℃, the pressure is 2.0-5.0MPa, the temperature of a steady flow cooling conveying section (9) is 8-12 ℃, 0.05-1.0 mass percent of carbon dioxide fluid is added into the compression refining section (15) of the extruder under the matching of a carbon dioxide storage tank (17) and an injection pump (16) to enable the compression refining section to be in a supercritical carbon dioxide state, 0.2-2 percent of isolating agent is added into the steady flow cooling conveying section (9) of the extruder, the rotating speed of a screw is controlled to be 200rpm and the screw reacts for 1-4 minutes, extruding the mixture by an extruder head to obtain the small-particle reclaimed rubber with the Mooney viscosity of less than 60, the temperature of which is 30-60 ℃, the particle diameter of which is 5-30 mm.
10. A method for continuously producing a low-mooney rebound small particle reclaimed rubber device, comprising the steps of any one of claims 1 to 8, the method comprising:
step one; when the device is used, a control console (19) is utilized to respectively start a motor (1), an air suction pump (12), an electric gate valve (13), an injection pump (16), an annular electric heating wire (211), a servo motor (218) and a driving motor (226), firstly, the desulfurized rubber powder enters the full-meshing co-rotating twin-screw refining extruder through a feed chute (3), during the period, the starting of the servo motor (218) is utilized to drive a rotating rod (214) to rotate, a driving gear (213) and a driven gear (215) are driven to be meshed with each other along with the rotation of the rotating rod (214) to force a threaded column (216) and a gear (2116) to rotate simultaneously, the rotation of the gear (2116) is meshed with an inner gear ring (2117) to force the inner gear ring (2117) to drive a semi-arc-shaped guide seat (219), a desulfurized rubber powder inlet (2110) and a stirring rod (2113) to rotate under the guide sliding of a sliding block (2112, the entering desulfurized rubber powder is scattered and stirred by the rotation of the stirring rod (2113), and the scattered rubber powder enters the feeding tank (3) under the flow guidance of the semi-arc-shaped flow guide seat (219) for preheating;
step two; when the scattered desulfurized rubber powder enters the feeding chute (3), the rotating rod (214) rotates to drive the rotating ring (212) to integrally rotate under the guidance of the pulley block (2115), so that the annular electric heating wire (211) heats the inside of the through-flow chute (21) and the heated gas flows outwards, and meanwhile, the threaded column (216) rotates to drive the internal threaded sleeve (217) and the pulley block (2115) to ascend, so that the annular electric heating wire (211) can perform reciprocating lifting and rotary heating work, and the desulfurized rubber powder falling in the feeding chute (3) is enabled to obtain the preheating effect;
step three; when preheated rubber powder enters the first extrusion conveying section (18), the rubber powder sequentially passes through the first extrusion conveying section (18) after temperature control of the temperature control system (6), the compression refining section (15), the shearing refining section (14) and the steady flow cooling conveying section (9) to form regenerated rubber, during the process, when the steady flow cooling conveying section (9) passes through, the mounting roller (222) and the concave fixed trough (223) are driven to integrally rotate through the driving motor (226), the concave fixed trough (223) is used for carrying out quantitative receiving on falling talcum powder, the brush plate (221) is used for being in contact with the inner wall of the feed port (224) in a fitting manner, the talcum powder is prevented from being adhered to the wall surface of the feed port (224), and the talcum powder can be sequentially fed into the nozzle (225) under the cooperation of the isolating agent feeding mechanism (22) to carry out pneumatic powder spraying work;
step four; the device can start the electric gate valve (13) to open the steady flow cooling conveying section (9) for ventilation when the heat source accumulation in the double-screw extrusion mechanism (4) is too large and is not easy to discharge, and utilizes the diversion communication of the air suction pump (12) and the diversion trench (11) to pump out the gas in the steady flow cooling conveying section (9) and the double-screw extrusion mechanism (4) and guide the gas from the air duct (5) to the feeding trench (3) to form waste heat utilization, so that the overflowed heat source covers the desulfurized rubber powder which falls down again for heating, and the continuous low-Mooney regenerated rubber production work is carried out.
CN202110273664.5A 2021-03-15 2021-03-15 Device and method for continuously preparing low-Mooney rebound small particle reclaimed rubber Pending CN112873779A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113402806A (en) * 2021-06-18 2021-09-17 浙江太湖远大新材料股份有限公司 Low-smoke halogen-free new energy automobile wire harness cable material and preparation process thereof
CN113502548A (en) * 2021-07-09 2021-10-15 江苏柯能新材料有限公司 Single-component polyester hot melt silk equipment and process thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113402806A (en) * 2021-06-18 2021-09-17 浙江太湖远大新材料股份有限公司 Low-smoke halogen-free new energy automobile wire harness cable material and preparation process thereof
CN113502548A (en) * 2021-07-09 2021-10-15 江苏柯能新材料有限公司 Single-component polyester hot melt silk equipment and process thereof

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