CN104890215A - Screw and charging barrel structure for strong-shearing-force chemical reactor - Google Patents
Screw and charging barrel structure for strong-shearing-force chemical reactor Download PDFInfo
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- CN104890215A CN104890215A CN201510324357.XA CN201510324357A CN104890215A CN 104890215 A CN104890215 A CN 104890215A CN 201510324357 A CN201510324357 A CN 201510324357A CN 104890215 A CN104890215 A CN 104890215A
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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
- B29C48/25—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
- B29C48/505—Screws
- B29C48/64—Screws with two or more threads
- B29C48/65—Screws with two or more threads neighbouring threads or channels having different configurations, e.g. one thread being lower than its neighbouring thread
-
- 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
- B29C48/397—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 a single screw
-
- 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
- B29C48/505—Screws
- B29C48/535—Screws with thread pitch varying along the longitudinal axis
-
- 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
- B29C48/505—Screws
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
-
- 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
- B29C48/505—Screws
- B29C48/64—Screws with two or more threads
-
- 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
- B29C48/505—Screws
- B29C48/64—Screws with two or more threads
- B29C48/655—Screws with two or more threads having three or more threads
-
- 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
- B29C48/68—Barrels or cylinders
- B29C48/681—Barrels or cylinders for single screws
-
- 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
- B29C48/68—Barrels or cylinders
- B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
-
- 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
- B29C48/68—Barrels or cylinders
- B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
- B29C48/688—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having threads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a screw and charging barrel structure for a strong-shearing-force chemical reactor. According to the structure, a strong shearing section is communicated with the back end surface of a melting section, and a screw in the strong shearing section rotates in a charging barrel to form a strong shearing and conveying structure; screw edges of the screw in the strong shearing section and screw grooves in the charging barrel adopt a combined structure of a screw structure and a linear structure; the thread number of both the screw edges of the screw and the screw grooves in the charging barrel is 5; the rise angles of the screw edges of the screw and the screw grooves in the charging barrel are 40 degrees; when the width of the screw edges of the screw and the screw grooves in the charging barrel is 10, the height of the screw edges of the screw is 4.5 mm, and the depth of the screw grooves in the charging barrel is 2 mm; the rotating directions of the screw edges of the screw and the screw grooves in the charging barrel are opposite. The screw edges of the screw in the strong shearing section and the screw grooves in the charging barrel adopt a screw and linear combined structure, so that the shearing performance of the chemical reactor on molten state high polymer material is improved by 100%.
Description
Technical field
The present invention relates to a kind of screw rod and material cylinder structure of extruder, especially a kind of screw rod with Strong shear power for extruder and material cylinder structure.
Background technology
PUR is as the hot sticky glue that can obtain bonding mobility after a kind of heating.Its main feature is that adhesion strength is high, selects different PURs according to different use occasions.The PUR prepared by molecular polyolefin chain rupture and maleic anhydride graft is for metal and nonmetally all have certain caking property.When the quality of adhesive property depends on prepared by PUR, the degree of graft reaction, and the degree of graft reaction depends on the chain rupture degree of molecular polyolefin.Therefore, improve the chain rupture degree of high molecular polymer strand, the performance of PUR product is had great significance.
Publication number is the patent of invention that CN1130545A discloses one " Mechanico-chemical reactor ", use macromolecule under effect of stress, carry out the general principle of chemical reaction, use for reference design and the structure of Chinese tradition stone mill, invented can be used for polymer and filler pulverizing, mixing and force-chemical reaction pan type physico chemical reactor.This reactor, in process, can provide larger extruding and shear action, makes material be subject to the active force of all directions and broken.Achieve preparation under the technical conditions of the field of force and there is specific function and high performance new material.But this invention only has certain effect to the chain rupture modification of common high molecular polymer strand, but due to the restriction of mill radius, can produce the impact of two aspects, be that rotating speed is limited on the one hand, is that the effective travel that material flow is sheared is limited on the other hand.Therefore it is limited to the shear effect of material, and material is if desired sheared fully, and material need add again, repeatedly repeats processing.
" a kind of Strong shear Mechanico-chemical reactor " of inventor's prior inventions, publication number is CN103566862A, this reactor is that the shear constitution of " abrasive disk type " is incorporated into " spiral " shear constitution, further increase the PUR properties of product of high molecular polymer, achieve quantity-produced object." spiral " shear constitution is much smaller relative to its radius of turn of shear constitution of " abrasive disk type ", therefore can significantly promote its rotary speed.And " spiral " shear constitution adds the effective travel that material flow sheared, thus make shearing more abundant.Therefore " spiral " shear constitution makes the shear effect of Mechanico-chemical reactor have larger lifting.
When above-mentioned shear constitution carries out reacting processing to some macromolecular material, also there is screw thread shearing force inadequate, the problems such as graft copolymerization is insufficient, and extrusion efficiency is low.This is due in force-chemical reaction, when mechanical force makes macromolecular chain chain rupture, its essence is the velocity gradient suffered by material flow.Velocity gradient is larger, is more conducive to the chain rupture of strand.And the movement locus of material flow should be changed, avoid partial material be not subject to Strong shear and flow out, material as much as possible is sheared, improve the degree of graft reaction, thus promote the performance of PUR product.Therefore, need to be optimized design to its structure further, carry out experimental study simultaneously, design and determine preferably design parameter and complete technical scheme thereof, to improve the cutting performance of extruder to high molecular polymer strand further, improve percent grafting and extrude rate, to adapt to the demand of PUR properties of product.
Summary of the invention
The concrete technical problems that the present invention will solve is by the existing screw rod of shearing force chemical reactor and the improvement of material cylinder structure, the shearing force of further raising polymer chemistry reactor, to reach macromolecular material, graft copolymerization is abundant in the reactor, and provides a kind of screw rod and material cylinder structure of Strong shear Mechanico-chemical reactor.
Specific tasks of the present invention are achieved through the following technical solutions.
The screw rod of Strong shear Mechanico-chemical reactor and a material cylinder structure, comprise the fixing transportation section of reactor frame and melt zone, and in melt zone, screw rod rotates realization shearing and structure for conveying in barrel; It is characterized in that: have additional Strong shear section and screw rod thereof in melt zone rear end and rotate in barrel and realize Strong shear structure;
In described Strong shear section, screw rod spiral shell rib and barrel screw channel are the combining structures of spiral shell linear structure and linear structure;
The head number of described screw rod spiral shell rib and barrel screw channel is 5;
The lift angle of described screw rod spiral shell rib and barrel screw channel is 40 °;
When the width of described screw rod spiral shell rib and barrel screw channel is 10mm, screw rod spiro edge height is 4.5mm, barrel spiral groove depth is 2mm; And screw rod spiral shell rib is contrary with the direction of rotation of barrel screw channel.
Further, additional technical feature is as follows.
The helical type of described screw rod spiral shell rib and barrel screw channel and linear pattern combining structure are linear structure+spiral shell linear structure, linear structure+spiral shell linear structure+linear structure, spiral shell linear structure+linear structure+spiral shell linear structure.
When the combining structure of described spiral shell linear structure and linear structure is the combining structure of spiral shell linear structure+linear structure+spiral shell linear structure, the head number of screw rod spiral shell rib and barrel screw channel is 5, and the lift angle of screw rod spiral shell rib and barrel screw channel is 40 °; When the width of described screw rod spiral shell rib and barrel screw channel is 10 mm, screw rod spiro edge height is 4.5mm, barrel spiral groove depth is 2mm, and the shear rate of material flow is 1450
-s.
The described screw rod of spiral shell linear structure+linear structure+spiral shell linear structure and the combining structure ratio of barrel are 1:1:1.
The section structure of described screw rod spiral shell rib and barrel screw channel is the one in triangular structure, rectangular configuration and trapezium structure.
The screw rod of a kind of Strong shear Mechanico-chemical reactor that the invention described above of the present invention provides and material cylinder structure, by improving the screw rod of existing chemical reactor and material cylinder structure, improve the shearing force of macromolecular material in polymer chemistry reactor, make the reaction of macromolecular material graft copolymerization in the reactor more abundant, achieve different macromolecular material graft copolymerization in the reactor, compared with prior art, its advantage and good effect as follows:
The combining structure of screw rod spiral shell rib of the present invention and barrel screw channel improves high molecular polymer material graft copolymerization effect in the reactor, and the cutting performance of chemical reactor to molten state macromolecular material is improve 100%.
Screw rod spiral shell rib of the present invention and barrel screw channel all adopt two ends helical type, and middle linear structure arranged evenly, changes the motion mode of material flow, and shearing is occurred more abundant, mass transport is more reasonable.
The combining structure of trapezoidal screw spiral shell rib section of the present invention and trapezoidal barrel screw channel section can also form larger shear rate gradient, thus forms stronger shearing force field, makes high molecular polymer reach better chain rupture and graft effect.
The combining structure of trapezoidal screw spiral shell rib section of the present invention and trapezoidal barrel screw channel section makes high molecular polymer material when flowing through this section, the relative motion of the screw rod that rotation direction is contrary and barrel makes high molecular polymer material through more shearing number of times, reaches better chain rupture and graft effect with this.
Accompanying drawing explanation
Fig. 1 is the structural representation of Strong shear Mechanico-chemical reactor of the present invention.
Fig. 2 is the screw-rod structure schematic diagram of Strong shear Mechanico-chemical reactor of the present invention.
Fig. 3 is the barrel configuration schematic diagram of Strong shear Mechanico-chemical reactor of the present invention.
Fig. 4 is screw rod spiral shell rib of the present invention and barrel screw channel section configuration is leg-of-mutton structural representation.
Fig. 5 is screw rod spiral shell rib of the present invention and barrel screw channel section configuration is the structural representation of rectangle.
Fig. 6 is screw rod spiral shell rib of the present invention and barrel screw channel section configuration is trapezoidal structural representation.
Fig. 7 is all combination schematic diagrames of the various not threaded spiral shell rib of the present invention and barrel screw channel section configuration.
Detailed description of the invention
Below the specific embodiment of the present invention is made further instructions.
Screw rod and the material cylinder structure of above-mentioned the provided a kind of Strong shear Mechanico-chemical reactor of the present invention are provided, implement under premised on technical solution of the present invention, given detailed embodiment and specific operation process, be not limited to the detailed description of the invention that the present invention is following.
As described in accompanying drawing, Fig. 1 is the structural representation of screw rod of the present invention and barrel, and wherein, the dextrorotation of screw rod spiral shell rib, barrel screw channel is left-handed.Fig. 2, Fig. 3 and Fig. 4 are that screw rod spiral shell rib of the present invention and barrel screw channel section configuration are respectively triangular structure, rectangular configuration or trapezium structure.Fig. 5 is the various combining structures under the different section shape of screw rod spiral shell rib of the present invention and barrel screw channel.
The specific embodiment of the present invention is on the basis of existing macromolecule Mechanico-chemical reactor structure, the structure of reactor is improved, namely have additional forced shears segment in the termination of former reactor melt zone, to the screw rod spiral shell rib of forced shears segment and the concrete improvement of barrel screw channel as follows.
The screw rod of Strong shear Mechanico-chemical reactor and a material cylinder structure, comprise the fixing transportation section of reactor frame and melt zone, and in melt zone, screw rod rotates realization shearing and structure for conveying in barrel; Its architectural feature is: have additional Strong shear section and screw rod thereof in melt zone rear end and rotate in barrel and realize Strong shear structure.
Wherein, in Strong shear section, screw rod spiral shell rib and barrel screw channel adopt the combining structure of spiral shell linear structure and linear structure, also following three kinds of structures can be selected, i.e. linear structure+spiral shell linear structure, linear structure+spiral shell linear structure+linear structure, spiral shell linear structure+linear structure+spiral shell linear structure, processing adopts general machining can obtain helical type and linear combining structure, work in-process, the head number of screw rod spiral shell rib and barrel screw channel is designed to 5, the lift angle of screw rod spiral shell rib and barrel screw channel is designed to 40 °
When the width design of screw rod spiral shell rib and barrel screw channel is 10mm, screw rod spiro edge height is designed to 4.5mm, barrel spiral groove depth is designed to 2mm; And screw rod spiral shell rib is contrary with the direction of rotation of barrel screw channel.
In embodiments of the present invention, preferentially select the composite construction of spiral shell linear structure+linear structure+spiral shell linear structure further, when adopting this structure, the combining structure ratio of screw rod and barrel is 1:1:1, the head number of screw rod spiral shell rib and barrel screw channel is processed by 5, and the lift angle of screw rod spiral shell rib and barrel screw channel is processed, when the width of screw rod spiral shell rib and barrel screw channel is 10mm by 40 °, screw rod spiro edge height is 4.5mm, barrel spiral groove depth is 2mm, and the shear rate of material flow is 1450
-s, result of use is better, obtains outstanding
In embodiments of the present invention, the section structure of screw rod spiral shell rib and barrel screw channel can select the one in triangular structure, rectangular configuration and trapezium structure.
Below in conjunction with Figure of description, the specific embodiment of the present invention is further illustrated.
In following experimental program, utilize above-mentioned Strong shear Mechanico-chemical reactor to process high density polyethylene (HDPE) particle, and add antioxidant, prevent polythene material, through shearing rear oxidation degraded.By the mean molecule quantity of polythene material before and after contrast process, pass judgment on the shear effect of this equipment to polythene material.
The effect tendency of Experimental comparison's cross sectional shape of screw rod spiral shell rib and machine barrel screw channel, head number, lift angle successively in an embodiment, and in example 4, disclose experimental result when best screw rod and machine barrel parameter.
Embodiment 1
The screw rod in Strong shear portion and the screw thread distribution form of machine barrel are all according to the spread pattern of spiral-straight line-spiral.Spiro rod length l=270mm, diameter D=90mm, draw ratio is 3.
Screw zones length compares: spiral: straight line: spiral=1:1:1; Spiral part spiral shell rib head number is 3, and draw ratio is 1, dextrorotation, spiral shell rib lift angle 50 °; Straight line portion spiral shell rib head number is 3, and uniform, draw ratio is 1.
Barrel length l=270, diameter D=92mm, draw ratio is 3.
The each Length Ratio of machine barrel is spiral: straight line: spiral=1:1:1; Spiral part screw channel head number is 3, and draw ratio is 1, left-handed, spiral shell rib lift angle 50 °; Straight line portion spiral shell rib head number is 5, and uniform, draw ratio is 1.
The spiral shell prismatic shape of screw rod and machine barrel carries out combination experiment, as accompanying drawing 7 successively according to the form of triangle, rectangle and trapezoidal combined crosswise.
Power of motor 22Kw, rotating speed 600 revs/min.
Raw material: high density polyethylene (HDPE): HDPE, 5000S, melt index MI:0.7g/ (10min) (190 DEG C, load 2.16Kg) CNPC's Lanzhou Petrochemical.
Antioxidant 1010: technical grade, BeiJing, China's chemical industry three factory.
Irgasfos 168: technical grade, BeiJing, China's chemical industry three factory.
Experimental facilities: Strong shear Mechanico-chemical reactor.
Test index: mean molecule quantity (solution viscosity).
Test result: as table 1
The mean molecule quantity during combination of table 1. difformity after polyethylene shearing.
Embodiment 2
The screw rod in Strong shear portion and the screw thread distribution form of machine barrel are all according to the spread pattern of spiral-straight line-spiral.Spiro rod length l=270mm, diameter D=90mm, draw ratio is 3.
Screw zones length compares: spiral: straight line: spiral=1:1:1; Spiral part draw ratio is 1, dextrorotation, spiral shell rib lift angle 50 °; Straight line portion spiral shell rib is uniform, and draw ratio is 1, and spiral shell rib section is all chosen as trapezoidal shape.
Barrel length l=270, diameter D=92mm, draw ratio is 3.
The each Length Ratio of machine barrel is spiral: straight line: spiral=1:1:1; Spiral part draw ratio is 1, left-handed, spiral shell rib lift angle 50 °; Straight line portion spiral shell rib is uniform, and draw ratio is 1, and spiral shell rib section is all chosen as trapezoidal shape.
The head number of screw rod spiral shell rib and machine barrel screw channel carries out combination experiment successively according to the form of 3,4 and 5 combined crosswise.
Power of motor 22Kw, rotating speed 600 revs/min.
Raw material: high density polyethylene (HDPE): HDPE, 5000S, melt index MI:0.7g/ (10min) (190 DEG C, load 2.16Kg) CNPC's Lanzhou Petrochemical.
Antioxidant 1010: technical grade, BeiJing, China's chemical industry three factory.
Irgasfos 168: technical grade, BeiJing, China's chemical industry three factory.
Experimental facilities: Strong shear Mechanico-chemical reactor.
Test index: mean molecule quantity (solution viscosity).
Test result: as table 2
Mean molecule quantity when the different array of table 2. is closed after polyethylene shearing.
Embodiment 3
The screw rod in Strong shear portion and the screw thread distribution form of machine barrel are all according to the spread pattern of spiral-straight line-spiral.Spiro rod length l=270mm, diameter D=90mm, draw ratio is 3.
Wherein screw zones length ratio: spiral: straight line: spiral=1:1:1; Spiral part spiral shell rib head number is 5, and draw ratio is 1, dextrorotation; Straight line portion spiral shell rib head number is 5, and uniform, draw ratio is 1; Spiral shell rib section configuration is trapezoidal, as accompanying drawing 6.
Barrel length l=270, diameter D=92mm, draw ratio is 3.
Wherein each Length Ratio of machine barrel is spiral: straight line: spiral=1:1:1, and spiral part screw channel head number is 5, and draw ratio is 1, left-handed; Straight line portion spiral shell rib head number is 5, and uniform, draw ratio is 1; Spiral shell rib section configuration is trapezoidal, as accompanying drawing 6.
The lift angle of screw rod spiral shell rib and machine barrel screw channel carries out combination experiment successively according to the form of 20 °, 30 °, 40 ° and 50 ° combined crosswise.
Power of motor 22Kw, rotating speed 600 revs/min.
Raw material: high density polyethylene (HDPE): HDPE, 5000S, melt index MI:0.7g/ (10min) (190 DEG C, load 2.16Kg) CNPC's Lanzhou Petrochemical.
Antioxidant 1010: technical grade, BeiJing, China's chemical industry three factory.
Irgasfos 168: technical grade, BeiJing, China's chemical industry three factory.
Experimental facilities: Strong shear Mechanico-chemical reactor.
Test index: mean molecule quantity (solution viscosity).
Test result: as table 3
Mean molecule quantity when the different lift angle of table 3. combines after polyethylene shearing.
Embodiment 4
The screw rod in Strong shear portion and the screw thread distribution form of machine barrel are all according to the spread pattern of spiral-straight line-spiral.Spiro rod length l=270mm, diameter D=90mm, draw ratio is 3.
Wherein screw zones length ratio: spiral: straight line: spiral=1:1:1, spiral part spiral shell rib head number is 5, and draw ratio is 1, dextrorotation, spiral shell rib lift angle 40 °, spiral shell rib width 10mm, groove depth 4.5mm.
Straight line portion spiral shell rib head number is 5, and uniform, draw ratio is 1, and spiral shell rib width is 10mm, groove depth 4.5mm, and spiral shell rib section configuration is trapezoidal, as accompanying drawing 6.
Barrel length l=270, diameter D=92mm, draw ratio is 3.
Wherein each Length Ratio of machine barrel is spiral: straight line: spiral=1:1:1, and spiral part screw channel head number is 5, and draw ratio is 1, left-handed, spiral shell rib lift angle 40 °, screw channel width 10mm, groove depth 2mm.
Straight line portion spiral shell rib head number is 5, and uniform, draw ratio is 1, and screw channel width is 10mm, groove depth 2mm, and spiral shell rib section configuration is trapezoidal, as accompanying drawing 6.
Power of motor 22Kw, rotating speed 600 revs/min.
Raw material: high density polyethylene (HDPE): HDPE, 5000S, melt index MI:0.7g/ (10min) (190 DEG C, load 2.16Kg) CNPC's Lanzhou Petrochemical.
Antioxidant 1010: technical grade, BeiJing, China's chemical industry three factory.
Irgasfos 168: technical grade, BeiJing, China's chemical industry three factory.
Experimental facilities: Strong shear Mechanico-chemical reactor.
Test index: mean molecule quantity (solution viscosity);
Before processing, the mean molecule quantity of polythene material is about 5X105;
After processing, the mean molecule quantity of polythene material is about 1.43 X105.
Interpretation of result: the reduction of high density polyethylene (HDPE) molecular weight, just because of the strand generation chain rupture making high-density polyethylene material of this Strong shear Mechanico-chemical reactor.Can significantly be found out by embodiment test result, the impact on experimental result when the different section shape of screw rod spiral shell rib and machine barrel screw channel, head number and lift angle.Trapezoidal section configuration can be seen, the increase of head number is all conducive to poly shearing.The lift angle of screw thread is little for the impact of poly shear effect when 40 ° and 50 °, but considers the impact of lift angle for extrusion efficiency, and therefore selected 40 ° is good.Determine optimum screw rod and machine barrel form parameter in example 4, can find out that the mean molecule quantity of polythene material before and after processing has a very large change, therefore can assert this Strong shear Mechanico-chemical reactor, there is good shear effect.
Screw rod outer surface and the barrel inner surface of this extruder Strong shear section are cylindrical shape, and one section of screw rod is processed with M24 screw thread pair, so that forward part connects with it.Screw diameter D=90mm, the distribution form of screw rod spiral shell rib comprises helical type and linear pattern, according to helical type: linear pattern: helical type is the ratio distribution of 1:1:1.Wherein helical type spiral shell rib head number is 5, and spiral shell rib lift angle is 40 °, and draw ratio is 1, and spiral shell rib width is 10mm, and spiro edge height is 4.5mm, and spiral shell rib cross sectional shape is trapezoidal, refers to accompanying drawing 6.Linear pattern spiral shell rib quantity is 5, and distribution form is uniform, and length is 90mm, and the section configuration of linear pattern spiral shell rib is identical with helical type spiral shell rib section configuration.Barrel internal diameter is 92mm, and the distribution form of barrel screw channel comprises helical type and linear pattern equally, according to helical type: linear pattern: helical type is the ratio distribution of 1:1:1.Wherein helical type screw channel head number is 5, and screw channel lift angle is 40 °, and draw ratio is 1, and screw channel width is 10mm, and spiro edge height is 2mm, and screw channel cross sectional shape is trapezoidal, refers to accompanying drawing 6.Linear pattern screw channel quantity is 5, and distribution form is uniform, and length is 90mm, and the section configuration of linear pattern screw channel is identical with helical type screw channel section configuration.Screw speed is 200-600r/min, and power is 22kW, processes raw material as high density polyethylene (HDPE), the trade mark: Fushun petrochemical industry 2911.
Operation principle of the present invention is shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 and accompanying drawing 6, and screw rod and the barrel outer surface of described Strong shear Mechanico-chemical reactor are cylindrical shape; Described screw rod outer wall is processed with spiral shell rib, and described material tube inner wall is processed with screw channel, and the optimal size of described screw rod and barrel is determined; Material particles is via behind the transportation section of fore-body and melt zone, and solid material particle has been converted into the material flow of molten state; Molten state material flow enters Strong shear portion through arc-shaped transition section; Molten state material flow relatively rotates through Strong shear portion screw rod and barrel, is subject to higher spiral shear effect, and the chain rupture realizing molten state material flow is sheared; Molten state material flow after being sheared is extruded finally by extrusion.
Be about 100-400kg/h by the output of extruding of the Mechanico-chemical reactor of the method and design of Structural Parameters, melt temperature is 180 DEG C can reach 1450-s to the maximum shear speed of material flow.
Claims (5)
1. the screw rod of Strong shear Mechanico-chemical reactor and a material cylinder structure, comprises the fixing transportation section of reactor frame and melt zone, and in melt zone, screw rod rotates and realizes shearing and structure for conveying in barrel; It is characterized in that: have additional Strong shear section and screw rod thereof in melt zone rear end and rotate in barrel and realize Strong shear structure;
In described Strong shear section, screw rod spiral shell rib and barrel screw channel are the combining structures of spiral shell linear structure and linear structure;
The head number of described screw rod spiral shell rib and barrel screw channel is 5;
The lift angle of described screw rod spiral shell rib and barrel screw channel is 40 °;
When the width of described screw rod spiral shell rib and barrel screw channel is 10mm, screw rod spiro edge height is 4.5mm, barrel spiral groove depth is 2mm; And screw rod spiral shell rib is contrary with the direction of rotation of barrel screw channel.
2. the screw rod of Strong shear Mechanico-chemical reactor according to claim 1 and material cylinder structure, is characterized in that: the helical type of described screw rod spiral shell rib and barrel screw channel and linear pattern combining structure are linear structure+spiral shell linear structure, linear structure+spiral shell linear structure+linear structure, spiral shell linear structure+linear structure+spiral shell linear structure.
3. the screw rod of Strong shear Mechanico-chemical reactor according to claim 2 and material cylinder structure, it is characterized in that: when the combining structure of described spiral shell linear structure and linear structure is the combining structure of spiral shell linear structure+linear structure+spiral shell linear structure, the head number of screw rod spiral shell rib and barrel screw channel is 5, and the lift angle of screw rod spiral shell rib and barrel screw channel is 40 °; When the width of described screw rod spiral shell rib and barrel screw channel is 10mm, screw rod spiro edge height is 4.5mm, barrel spiral groove depth is 2mm, and the shear rate of material flow is 1450-s.
4. the screw rod of Strong shear Mechanico-chemical reactor according to claim 3 and material cylinder structure, is characterized in that: the described screw rod of spiral shell linear structure+linear structure+spiral shell linear structure and the combining structure ratio of barrel are 1:1:1.
5. the screw rod of Strong shear Mechanico-chemical reactor according to claim 1 and 2 and material cylinder structure, is characterized in that: the section structure of described screw rod spiral shell rib and barrel screw channel is the one in triangular structure, rectangular configuration and trapezium structure.
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Effective date of registration: 20210121 Address after: 454950 600 meters northeast of baoanzhuang village, Dafeng Town, Taofeng Industrial Zone, Wuzhi County, Jiaozuo City, Henan Province Patentee after: Jiaozuo Yutong Plastic Technology Co.,Ltd. Address before: 030024 No. 79 West Main Street, Wan Berlin District, Shanxi, Taiyuan, Yingze Patentee before: Taiyuan University of Technology |