CN102729353B - Thermoplastic resin granulation method and device thereof - Google Patents
Thermoplastic resin granulation method and device thereof Download PDFInfo
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- CN102729353B CN102729353B CN201210203073.1A CN201210203073A CN102729353B CN 102729353 B CN102729353 B CN 102729353B CN 201210203073 A CN201210203073 A CN 201210203073A CN 102729353 B CN102729353 B CN 102729353B
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Abstract
The present invention discloses a thermoplastic resin granulation method and a device thereof. The method comprises the following steps: carrying out composite extruding on a thermoplastic resin and an inorganic filler with an extruder to form a composite resin; carrying out bracing water cooling and granulation on the composite resin with a bracing granulation machine to form particles; screening the particles with a screening machine; and separating the particles from the powder with a particle separation device. According to the thermoplastic resin granulation method of the present invention, bracing water cooling, granulation and screening are sequentially performed, and then the particle separation device is adopted to separate the particles from the powder, such that the powder content in the particles is reduced, the powder problem of the downstream injection molding plant during the production process is effectively solved, and the production efficiency and the yield are improved.
Description
Technical field
The present invention relates to chemical technology field, particularly relate to a kind of thermoplastic resin prilling process and equipment.
Background technology
Thermoplastic resin (Thermoplastic), because it can do solid-state and liquid conversion under temperature conditions change, so there is strong, the composite modified advantage such as workable of machinability, be widely used in the fields such as electronics, automobile, machine-building, daily necessities.
Thermoplastic resin is applied mainly with the form of composite of adding glass fibre or inorganic filler in engineering plastics field, and in order to strengthen intensity, reduce costs, the production technology of this thermoplastic resin mostly is the compound extruded tie rod cold cut granulation pattern of low cost.But, extruding in tie rod cold cut granulating working procedure, due to the impact of inorganic filler, a large amount of powder will be produced.And filling ratio is higher, the powder of generation is also more.This powder and finished particle mix, and cause various problems by producing the injection moulding in later stage.Such as, blocking injection machine charging aperture, injection-molded item are rough, the blocking of die venting mouth, goods are filled insufficient or overlap is many, products machinery hydraulic performance decline etc. is abnormal, cause that injection moulding plant produced efficiency is low, qualification rate is low, and then make the quality of goods be difficult to ensure.
Summary of the invention
Main purpose of the present invention is to provide a kind of thermoplastic resin prilling process, is intended to the content of powder reducing particle.
The invention provides a kind of thermoplastic resin prilling process, comprise the following steps:
Thermoplastic resin and inorganic filler are carried out compound extruded by extruder, form compound resin;
Compound resin is formed particle through tie rod water cooling, pelletizing by strand pelletizer;
Screening machine sieves particle;
Particle is carried out surface treatment by surface processing device; Wherein said surface processing device is blending tank, and be the pipeline configuration of a L shape passage, particle enters from the lower end of this blending tank with tangential direction, and in blending tank high velocity air drive under rotate after, from outlet discharge;
Particle is separated with powder by particle sorting apparatus.
Preferably, described particle sorting apparatus is cyclone separator or at least one screening machine.
Preferably, described particle sorting apparatus is the combination of cyclone separator and at least one screening machine.
Preferably, described particle sorting apparatus also comprises after particle is carried out with powder the step be separated:
Powder recovering device by the Powder Recovery through being separated, and adds described extruder.
Present invention also offers a kind of thermoplastic resin Granulation Equipments, comprising:
Extruder, for thermoplastic resin and inorganic filler are carried out compound extruded, forms compound resin;
Strand pelletizer, for forming particle by compound resin through tie rod water cooling, pelletizing;
Screening machine, for sieving particle;
Surface processing device, for carrying out surface treatment by particle; Wherein said surface processing device is blending tank, and be the pipeline configuration of a L shape passage, particle enters from the lower end of this blending tank with tangential direction, and in blending tank high velocity air drive under rotate after, from outlet discharge;
Particle sorting apparatus, for by the particle after surface treatment and powder separation.
Preferably, described particle sorting apparatus is cyclone separator or at least one screening machine.
Preferably, described particle sorting apparatus is the combination of cyclone separator and at least one screening machine.
Preferably, also comprise powder recovering device, for will the Powder Recovery be separated be passed through, and add described extruder.
The present invention by thermoplastic resin prilling process after tie rod water cooling, pelletizing, screening, pass through surface processing device, particle sorting apparatus again by particle and powder separation, thus the content of powder in reduction particle, the powder puzzlement that effective solution downstream injection moulding factory faces in process of production, enhances productivity and qualification rate.In addition, by powder recovering device, the powder after separation is carried out recycling, saved cost.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of thermoplastic resin prilling process one embodiment of the present invention;
Fig. 2 is the schematic flow sheet of another embodiment of thermoplastic resin prilling process of the present invention;
Fig. 3 is the schematic flow sheet of the another embodiment of thermoplastic resin prilling process of the present invention;
Fig. 4 be thermoplastic resin Granulation Equipments one embodiment of the present invention structural representation;
Fig. 5 is the structural representation of another embodiment of thermoplastic resin Granulation Equipments of the present invention;
Fig. 6 is the structural representation of the another embodiment of thermoplastic resin Granulation Equipments of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Technical scheme of the present invention is further illustrated below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to Fig. 1, it is the schematic flow sheet of thermoplastic resin prilling process one embodiment of the present invention.Thermoplastic resin prilling process of the present invention comprises the following steps:
Thermoplastic resin and inorganic filler are carried out compound extruded by step S01, extruder, form compound resin;
Thermoplastic resin and inorganic filler are proportionally carried out proportioning, and it is carried out compound extruded by extruder, form compound resin.In the present embodiment, the ratio of inorganic filler and thermoplastic resin is (in mass ratio): thermoplastic resin 20%-40%, inorganic filler 5%-70%, glass fibre 0%-40%, particular modification additive 0%-10%.This extruder can be single screw extrusion machine, double screw extruder or multi-screw extruder.The extruder adopted in the embodiment of the present invention is the equidirectional parallel double-screw extruder that Toshiba produces.The feeding machine of this extruder is weight-loss type compute type.Thermoplastic resin and inorganic filler, special additive can use independent feeding or premix after feeding, the independent feeding of glass fibre, extrusion temperature are 230 DEG C-360 DEG C, screw speed is 200 revolutions per seconds-400 revolutions per seconds, and output is 200 kgs/hr-400 kgs/hr, compound extruded.Certainly, also can adopt other extruder, not limit at this.In embodiments of the present invention, this thermoplastic resin can comprise engineering plastics PPS, LCP, PBT, PA etc.
Compound resin is formed particle through tie rod water cooling, pelletizing by step S02, strand pelletizer;
After compound resin is extruded by extruder, and through tie rod water cooling, then be sent to pelleter, by pelleter, its size according to required particle carried out pelletizing, and form particle.Such as, diameter is 2-3mm, and length is the particle of 2.5-3.5mm.
Step S03, screening machine sieve particle;
Screening machine realizes the sorting to target material mainly through the combination of the perforate sieve plate of different pore size, when using, vibrating motor is relied on to provide energy, material is disperseed on sieve plate, vibrates and move along predetermined direction, material can reach the object of sorting in the process of movement by the sieve plate of different pore size.Therefore, the screening of this screening machine, mainly for separating of going out special-shaped particle, also the amount of powder of particle can be separated, the content of powder now in grain products is 8000-15000ppm simultaneously.
Particle is separated with powder by step S04, particle sorting apparatus.
In one embodiment of the present invention, above-mentioned particle sorting apparatus can be cyclone separator.This cyclone separator realizes the separation of material different component by the weight difference of material in the process of wind model material.The particle being mixed with powder is entered cyclone separator under the drive of wind-force, because powder weight is little, so it will discharge from exhaust outlet under the drive of wind-force, because particle weight is large, so it is stayed in cyclone separator because of the relation of gravity.Therefore, in order to take powder out of outlet better, and particle is stayed in cyclone separator, and in this cyclone separator, the size of wind-force specifically can be arranged according to parameters such as the structures of the specification of particle, density and cyclone separator, does not just limit at this.By the separation of cyclone separator, can reduce the content of powder of particle, now the content of powder of product is 6000-13000ppm.
In another embodiment of the present invention, above-mentioned particle sorting apparatus also can be at least one screening machine.The particle rank of sieving in this screening machine depends on the size of perforate on sieve plate, if the size of perforate is less than the size of particle on sieve plate, then this particle can not drop from hole, and stays on sieve plate.Such as, for diameter be 2-3mm, length is the particle of 2.5-3.5mm, the aperture on this sieve plate is then less than the diameter of particle and is greater than the diameter of powder, and such as, aperture on sieve plate is at below 2mm, more than 1.5mm.And the vibration of this sieve plate also can make the powder on particle depart from from particle, and drop from hole, therefore, utilize the method, the content of powder of particle can be reduced.Screening machine can also arrange multilayer screening, and the aperture of such as ground floor sieve plate is 5-6mm, and the aperture of the second layer is 1.5-2mm etc., and amplitude is 1.5-2.5mm.So sieved by the multilayer of screening machine, not only can isolate special-shaped particle, but also reduce further the content of powder of particle, now the content of powder of product is 3000-6000ppm.Be understandable that, this screening machine can be identical with the parameter of the screening machine of step S03; Also can be different, such as arrange accordingly according to the size of particle.And this particle sorting apparatus can be the stacked setting of multiple screening machine, thus can carry out multiple screening to particle, reduce further the content of powder of particle.
In another embodiment of the present invention, above-mentioned particle sorting apparatus can be the combination of cyclone separator and at least one screening machine.Particle first carries out first time powder separation through cyclone separator, then through the second time powder separation of at least one screening machine, thus the content of powder of particle can be reduced further.By cyclone separator and screening machine with the use of rear, the content of powder of its particle is 2000ppm-5000ppm.
The embodiment of the present invention by thermoplastic resin prilling process after tie rod water cooling, pelletizing, screening, again by particle sorting apparatus by particle and powder separation, thus the content of powder in reduction particle, the powder puzzlement that effective solution downstream injection moulding factory faces in process of production, enhances productivity and qualification rate.
With reference to Fig. 2, it is the schematic flow sheet of another embodiment of thermoplastic resin prilling process of the present invention.Be with the difference of said method embodiment: also comprised before the step S04 of above-described embodiment:
Particle is carried out surface treatment by step S05, surface processing device.
Above-mentioned surface processing device passes through in the process of being moved in surface processing device by particle, friction between particle, between particle and surface processing device inwall carries out polishing to the surface of particle, thus makes the surface of particle after processing can prevent particle from again producing the possibility of shed powder or particle bonding powder again.In the present embodiment, this surface processing device can be blending tank, and it is the pipeline configuration of a L shape passage, and particle enters from the lower end of this blending tank with tangential direction, and in blending tank high velocity air drive under rotate after, from outlet discharge.When the conduit volume of blending tank is certain, air velocity is larger, the better effects if of the polishing on surface.Air-flow is used for for particle provides the energy of motion, and its speed can be arranged according to the concrete condition of particle, and every air velocity carrying out the conveying of particle is all within the protection domain of this patent.Be understandable that, above-mentioned surface processing device also can carry out other devices of polishing for other to the surface of particle.
The embodiment of the present invention by after first carrying out surface finish process to grain products, then carries out powder separation by particle sorting apparatus to it, greatly reduces the content of powder of particle.Wherein, if when particle sorting apparatus is at least one screening machine, the combination of itself and surface processing device is 1000-2000ppm by making the content of powder of particle; If when particle sorting apparatus is cyclone separator, the combination of itself and surface processing device is 7000-13000ppm by making the content of powder of particle; If when particle sorting apparatus is the combination of cyclone separator and at least one screening machine, the combination of itself and surface processing device is 500-800ppm by making the content of powder of particle.
With reference to Fig. 3, it is the schematic flow sheet of the another embodiment of method of thermoplastic resin granulation of the present invention.On the basis of above-described embodiment, the method for the present embodiment thermoplastic resin granulation, also comprises after above-mentioned steps S04 or step S05:
Step S06, powder recovering device, by the Powder Recovery through being separated, add extruder.
After above-mentioned steps S04 and step S05, particle is formed with powder and is separated shape, and particle can as finished product, and be supplied to downstream injection moulding factory and do raw material use, powder then can be recycled to extruder and reuse.
Powder after separation is also carried out recycling by powder recovering device by the embodiment of the present invention, thus has saved cost.
With reference to Fig. 4, it is the structural representation of thermoplastic resin Granulation Equipments one embodiment of the present invention.This thermoplastic resin Granulation Equipments comprises extruder 100, strand pelletizer 200, screening machine 300 and particle sorting apparatus 400, wherein:
Extruder 100, for thermoplastic resin and inorganic filler are carried out compound extruded, forms compound resin;
Strand pelletizer 200, for forming particle by compound resin through tie rod water cooling, pelletizing;
Screening machine 300, for sieving particle;
Particle sorting apparatus 400, for by particle and powder separation.
First thermoplastic resin and inorganic filler are proportionally carried out proportioning, and it is carried out compound extruded by extruder 100, form compound resin.In the present embodiment, the ratio of inorganic filler and thermoplastic resin is (in mass ratio): thermoplastic resin 20%-40%, inorganic filler 5%-70%, glass fibre 0%-40%, particular modification additive 0%-10%.This extruder can be single screw extrusion machine, double screw extruder or multi-screw extruder.The equidirectional parallel double-screw extruder that the extruder 100 adopted in the embodiment of the present invention is produced for Toshiba.The feeding machine of this extruder is weight-loss type compute type.Thermoplastic resin and inorganic filler, special additive can use independent feeding or premix after feeding, the independent feeding of glass fibre, extrusion temperature are 230 DEG C-360 DEG C, screw speed is 200RPM-400RPM, and output is 200KG/H-400KG/H, compound extruded.
After compound resin is extruded by extruder 100, and through strand pelletizer 200, tie rod water cooling is carried out to it, then carry out pelletizing according to the size of required particle, and form particle.Then this particle is by the screening of screening machine 300, mainly isolates special-shaped particle, and also the amount of powder on particle can be separated, the content of powder now in grain products is 8000-15000ppm simultaneously.Finally, then by particle sorting apparatus 400 powder separation is again carried out to it.
In one embodiment of the present invention, above-mentioned particle sorting apparatus 400 can be cyclone separator.This cyclone separator realizes the separation of material different component by the weight difference of material in the process of wind model material.The particle being mixed with powder is entered cyclone separator under the drive of wind-force, because powder weight is little, so it will discharge from exhaust outlet under the drive of wind-force, because particle weight is large, so it is stayed in cyclone separator because of the relation of gravity.Therefore, in order to take powder out of outlet better, and particle is stayed in cyclone separator, and in this cyclone separator, the size of wind-force specifically can be arranged according to parameters such as the structures of the specification of particle, density and cyclone separator, does not just limit at this.By the separation of cyclone separator, can reduce the content of powder of particle, now the content of powder of product is 6000-13000ppm.
In another embodiment of the present invention, above-mentioned particle sorting apparatus 400 can be at least one screening machine.The particle rank of sieving in this screening machine depends on the size of perforate on sieve plate, if the size of perforate is less than the size of particle on sieve plate, then this particle can not drop from hole, and stays on sieve plate.Such as, for diameter be 2-3mm, length is the particle of 2.5-3.5mm, the aperture on this sieve plate is then less than the diameter of particle and is greater than the diameter of powder, and such as, aperture on sieve plate is at below 2mm, more than 1.5mm.And the vibration of this sieve plate also can make the powder on particle depart from from particle, and drop from hole, therefore, utilize the method, the content of powder of particle can be reduced.Screening machine can also arrange multilayer screening, and the aperture of such as ground floor sieve plate is 5-6mm, and the aperture of the second layer is 1.5-2mm etc., and amplitude is 1.5-2.5mm.So sieved by the multilayer of screening machine, not only can isolate special-shaped particle, but also reduce further the content of powder of particle, now the content of powder of product is 3000-6000ppm.Be understandable that, this screening machine can be identical with the parameter of screening machine 300; Also can be different, such as arrange accordingly according to the size of particle.And this particle sorting apparatus can be the stacked setting of multiple screening machine, thus can carry out multiple screening to particle, reduce further the content of powder of particle.
In another embodiment of the present invention, above-mentioned particle sorting apparatus 400 can be the combination of cyclone separator and at least one screening machine.Particle first carries out first time powder separation through cyclone separator, then through the second time powder separation of at least one screening machine, thus the content of powder of particle can be reduced further.By cyclone separator and screening machine with the use of rear, the content of powder of its particle is 2000-5000ppm.
The embodiment of the present invention by thermoplastic resin prilling process after tie rod water cooling, pelletizing, screening, pass through particle sorting apparatus 400 again by particle and powder separation, thus the content of powder in reduction particle, the powder puzzlement that effective solution downstream injection moulding factory faces in process of production, enhances productivity and qualification rate.
With reference to Fig. 5, it is the structural representation of another embodiment of thermoplastic resin Granulation Equipments of the present invention.Be with the difference of the said equipment embodiment: the thermoplastic resin Granulation Equipments of this embodiment also comprises: surface processing device 500, before described particle sorting apparatus 400 pairs of particles are carried out powder separation, surface treatment carried out to particle.Particularly, grain products before particle sorting apparatus 400 pairs of particles carry out powder separation, by the surface finish process through surface processing device 500.This surface processing device 500 passes through in the process of being moved in surface processing device 500 by particle, friction between particle, between particle and surface processing device 500 inwall carries out polishing to the surface of particle, thus makes the surface of particle after processing can prevent particle from again producing the possibility of shed powder or particle bonding powder again.In the present embodiment, this surface processing device 500 can be blending tank, and it is the pipeline configuration of a L shape passage, and particle enters from the lower end of this blending tank with tangential direction, and in blending tank high velocity air drive under rotate after, from outlet discharge.When the conduit volume of blending tank is certain, air velocity is larger, the better effects if of the polishing on surface.Air-flow is used for for particle provides the energy of motion, and its speed can be arranged according to the concrete condition of particle, and every air velocity carrying out the conveying of particle is all within the protection domain of this patent.Be understandable that, above-mentioned surface processing device 500 also can carry out other devices of polishing for other to the surface of particle.
The embodiment of the present invention first carries out surface finish process to grain products by surface processing device 500, then carries out powder separation by particle sorting apparatus 400 to it.Wherein, if when particle sorting apparatus is at least one screening machine, the combination of itself and surface processing device is 1000-2000ppm by making the content of powder of particle; If when particle sorting apparatus is cyclone separator, the combination of itself and surface processing device is 7000-13000ppm by making the content of powder of particle; If when particle sorting apparatus is the combination of cyclone separator and at least one screening machine, the combination of itself and surface processing device is 500-800ppm by making the content of powder of particle.
With reference to Fig. 6, it is the structural representation of the another embodiment of thermoplastic resin Granulation Equipments of the present invention.On the basis of said system embodiment, the present embodiment thermoplastic resin Granulation Equipments also comprises:
Powder recovering device 600, for by the Powder Recovery through being separated, adds extruder 100.
After particle is separated with powder by particle sorting apparatus 400, particle can as finished product, and be supplied to downstream injection moulding factory and do raw material use, powder then comes back to extruder by powder recovering device 600 and reuses.Powder after separation is also carried out recycling by powder recovering device 600 by the embodiment of the present invention, thus has saved cost.
The foregoing is only the preferred embodiments of the present invention; not thereby its scope of the claims is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; directly or indirectly be used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a thermoplastic resin prilling process, is characterized in that, comprises the following steps:
Thermoplastic resin and inorganic filler are carried out compound extruded by extruder, form compound resin;
Compound resin is formed particle through tie rod water cooling, pelletizing by strand pelletizer;
Screening machine sieves particle;
Particle is carried out surface treatment by surface processing device; Wherein said surface processing device is blending tank, and be the pipeline configuration of a L shape passage, particle enters from the lower end of this blending tank with tangential direction, and in blending tank high velocity air drive under rotate after, from outlet discharge;
Particle is separated with powder by particle sorting apparatus.
2. thermoplastic resin prilling process according to claim 1, is characterized in that, described particle sorting apparatus is cyclone separator or at least one screening machine.
3. thermoplastic resin prilling process according to claim 1, is characterized in that, described particle sorting apparatus is the combination of cyclone separator and at least one screening machine.
4. the thermoplastic resin prilling process according to claim 1 or 2 or 3, is characterized in that, described particle sorting apparatus also comprises after particle is carried out with powder the step be separated:
Powder recovering device by the Powder Recovery through being separated, and adds described extruder.
5. a thermoplastic resin Granulation Equipments, is characterized in that, comprising:
Extruder, for thermoplastic resin and inorganic filler are carried out compound extruded, forms compound resin;
Strand pelletizer, for forming particle by compound resin through tie rod water cooling, pelletizing;
Screening machine, for sieving particle;
Surface processing device, for carrying out surface treatment by particle; Wherein said surface processing device is blending tank, and be the pipeline configuration of a L shape passage, particle enters from the lower end of this blending tank with tangential direction, and in blending tank high velocity air drive under rotate after, from outlet discharge;
Particle sorting apparatus, for by the particle after surface treatment and powder separation.
6. thermoplastic resin Granulation Equipments according to claim 5, is characterized in that, described particle sorting apparatus is cyclone separator or at least one screening machine.
7. thermoplastic resin Granulation Equipments according to claim 5, is characterized in that, described particle sorting apparatus is the combination of cyclone separator and at least one screening machine.
8. the thermoplastic resin Granulation Equipments according to claim 5 or 6 or 7, is characterized in that, also comprise powder recovering device, for passing through the Powder Recovery be separated, and adds described extruder.
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| CN105643830A (en) * | 2016-03-23 | 2016-06-08 | 广西信和新合成材料有限公司 | Hot pelletizing process for phenolic moulding plastics |
| CN106236396A (en) * | 2016-08-19 | 2016-12-21 | 厦门延江新材料股份有限公司 | A kind of water-absorbing film and manufacture method thereof |
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| CN101885914A (en) * | 2010-07-13 | 2010-11-17 | 东莞市意普万工程塑料有限公司 | Composite material special for automobile engine oil pan and preparation method thereof |
| CN101955612A (en) * | 2010-06-22 | 2011-01-26 | 长江水利委员会长江科学院 | Composite plastic model sand for sediment solid model experiment and preparation method thereof |
| CN102294764A (en) * | 2011-08-24 | 2011-12-28 | 昆山科信橡塑机械有限公司 | Two-stage banburying production unit for low-smoke and halogen-free cable materials |
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|---|---|---|---|---|
| US4491553A (en) * | 1979-07-17 | 1985-01-01 | Lion Corporation | Method for producing filler-loaded thermoplastic resin composite |
| CN101955612A (en) * | 2010-06-22 | 2011-01-26 | 长江水利委员会长江科学院 | Composite plastic model sand for sediment solid model experiment and preparation method thereof |
| CN101885914A (en) * | 2010-07-13 | 2010-11-17 | 东莞市意普万工程塑料有限公司 | Composite material special for automobile engine oil pan and preparation method thereof |
| CN102294764A (en) * | 2011-08-24 | 2011-12-28 | 昆山科信橡塑机械有限公司 | Two-stage banburying production unit for low-smoke and halogen-free cable materials |
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