CN207808439U - A kind of double screw extruder of high CTI flame-retardant PA 66s - Google Patents
A kind of double screw extruder of high CTI flame-retardant PA 66s Download PDFInfo
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- CN207808439U CN207808439U CN201721634121.7U CN201721634121U CN207808439U CN 207808439 U CN207808439 U CN 207808439U CN 201721634121 U CN201721634121 U CN 201721634121U CN 207808439 U CN207808439 U CN 207808439U
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/482—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
- B29B7/483—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs the other mixing parts being discs perpendicular to the screw axis
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a kind of double screw extruders of high CTI flame-retardant PA 66s, including：Barrel and two intermeshing screw rods being arranged in barrel；Screw rod is divided into material conveying and melt zone, the first mixing section, exhaust section, the second mixing section, is vacuum-evacuated section and compacting transportation section, and includes following screw element：72/72,96/96,56/56,30 °/7/72,45 °/5/56,90 °/5/56,45 °/5/36L, 45 °/5/36,32/96 toothed disc, 56/28L.CTI >=600 of the PA66 plastics of the production of the utility model, fire-retardant fireproof be excellent, good mechanical performance, impact flexibility are high, product quality stability etc. is improved, and whole improvement cost is low, and material property indices are good.
Description
Technical field
The utility model is related to double screw extruder design field more particularly to a kind of pairs of high CTI flame-retardant PA 66s
Screw extruder.
Background technology
Meshing co rotating twin screw extrusion is to squeeze out common process equipment in processing.The core component of extruder is spiral shell
Bar, meshing co rotating twin screw extrusion are generally divided into the functional sections such as Solid Conveying and Melting, melting, exhaust, melt conveying.
In the prior art, the different forward screw thread element of generally use, reverse-flight elements, kneading block, toothed disc, S types
Element, hexagonal prisms element etc. form screw rod, and screw rod are applied in double screw extruder, the plastics kind made for needs
Difference, the arrangement of the screw element on screw rod and choose also can be different.Up to now, the spiral shell of double screw extruder in the prior art
The electrostatic tracking index of the flame-retardant PA 66 of line combination production is relatively low, wherein electrostatic tracking index abbreviation CTI, flame retardant rating is low, machine
Tool performance is not good enough, and properties of product are not sufficiently stable.
Invention content
The purpose of this utility model is to provide a kind of double screw extruder of high CTI flame-retardant PA 66s, and what is produced is fire-retardant
Electrostatic tracking index CTI >=600 of PA66, fire-retardant fireproof is excellent, improves the mechanical performance and impact flexibility of flame-retardant PA 66,
And the twin-screw extrusion equipment is well molded and extrusion processability energy, while also complying with all environmental requirements.
The technical scheme that the utility model is provided is as follows：
A kind of double screw extruder of high CTI flame-retardant PA 66s, including：Barrel and two intermeshings being arranged in barrel
Screw rod；The barrel is divided into material conveying and melt zone, the first mixing section, exhaust section, the second mixing section, is vacuum-evacuated
Section and compacting transportation section；The screw rod is divided into material conveying and melt zone, the first mixing section, exhaust section, second corresponding to barrel
Mixing section is vacuum-evacuated section and compacting transportation section, and includes following screw element successively：Material conveys and melt zone is followed successively by：72/
72、72/72、96/96、96/96、96/96、72/72、56/56、56/56、56/56；First mixing section is followed successively by：30°/7/72、
45°/5/56、45°/5/56、56/56、45°/5/56、45°/5/56、90°/5/56、45°/5/36L；Exhaust section is followed successively by：96/
96、96/96、72/72、72/72、45°/5/36、56/56、45°/5/56；Second mixing section is followed successively by：72/72、56/56、
45 °/5/56,90 °/5/56,72/72,32/96 toothed disc, 45 °/5/36,56/56,45 °/5/56,45 °/5/56,56/28L；
Section is vacuum-evacuated to be followed successively by：56/56,96/96,96/96,32/96 toothed disc；Compacting transportation section is followed successively by：72/72、56/56、
56/56、56/56、56/56。
Preferably, two screw rods have 90 ° of phase angle.
Preferably, the screw rod further includes splined shaft, and the screw element is set on the splined shaft and the screw element
It is connect by spline with the splined shaft.
Preferably, it is provided with feed opening on the material conveying of the barrel and melt zone, is provided on the exhaust section of the barrel
Exhaust outlet is provided with vacuum port in the vacuum exhaust section of the barrel.
A kind of double screw extruder of high CTI flame-retardant PA 66s provided by the utility model, can bring following
Advantageous effect：
The utility model makes the fire-retardant of production by the type of the permutation and combination and screw element of the screw element on change screw rod
CTI >=600 of PA66 plastics, fire-retardant fireproof be excellent, good mechanical performance, impact flexibility are high, product quality stability etc.
It is improved, whole improvement cost is low, and material property indices are good, and improved double screw extruder has good injection molding
With extrusion processability energy, while all environmental requirements are also complied with.
Description of the drawings
Below by a manner of clearly understandable, preferred embodiment is described with reference to the drawings, to double spiral shells of high CTI flame-retardant PA 66s
Above-mentioned characteristic, technical characteristic, advantage and its realization method of bar extruder are further described.
Fig. 1 is the structural representation of the specific implementation mode of the double screw extruder of the high CTI flame-retardant PA 66s of the utility model
Figure.
Drawing reference numeral explanation：
, 2-96/96,3-56/56,4-30 °/7/72,5-45 °/5/56,6-90 °/5/56,7-45 °/5/36L,
8-45 °/5/36,9-32/96 toothed discs, 10-56/28L, the conveying of A- materials and melt zone, A1- feed openings, the first mixing sections of B-,
C- exhaust sections, C1- exhaust outlets, the second mixing sections of D-, E- are vacuum-evacuated section, E1- vacuum ports, and F- is compacted transportation section.
Specific implementation mode
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, attached drawing will be compareed below
Illustrate specific embodiment of the present utility model.It should be evident that the accompanying drawings in the following description is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings, and obtains other embodiments.
To make simplified form, in each figure only schematically show with the relevant part of the utility model, they are simultaneously
Its practical structures as product is not represented.
In the present embodiment, the finger of label 1 72/72 in Fig. 1, the finger of label 2 96/96, the finger of label 3 56/56,30 ° of the finger of label 4/
7/72, label 5 refers to 45 °/5/56, and label 6 refers to 90 °/5/56, and label 7 refers to 45 °/5/36L, and label 8 refers to 45 °/5/36, and label 9 refers to
32/96 toothed disc, label 10 refer to 56/28L.
As shown in Figure 1, present embodiment discloses a kind of specific embodiment parties of the double screw extruder of high CTI flame-retardant PA 66s
Formula, including：Barrel and two intermeshing screw rods being arranged in barrel.Barrel be divided into material conveying and melt zone A,
First mixing section B, exhaust section C, the second mixing section D, it is vacuum-evacuated section E and compacting transportation section F, every screw rod corresponds to barrel
It is divided into material conveying and melt zone A, the first mixing section B, exhaust section C, the second mixing section D, section E is vacuum-evacuated and is compacted defeated
A section F is sent, and includes following screw element successively：
Material conveys and melt zone A is followed successively by：72/72、72/72、96/96、96/96、96/96、72/72、56/56、56/
56,56/56, wherein 72/72 indicate helical pitch be 72mm, forward screw thread block that length is 72mm, other screw elements.
Material is transported through heat transmission and fricting shearing in this section, and material is made fully to melt and be homogenized.
First mixing section B is followed successively by：30°/7/72、45°/5/56、45°/5/56、56/56、45°/5/56、45°/5/56、
90 °/5/56,45 °/5/36L, wherein 30 °/7/72 indicates that 7 teeth that stagger arrangement angle is 30 °, helical pitch are that the positive of 72mm is mediated
Block, the L in 45 °/5/36L indicate that the kneading block is reversed kneading block, other screw elements and so on.In this section, material group
Dividing size, further refinement forms ideal structure with uniformly, has distributivity and dispersed mixed function.
Exhaust section C is followed successively by：96/96,96/96,72/72,72/72,45 °/5/36,56/56,45 °/5/56, water is discharged
The impurity such as vapour, low molecular weight substance.
Second mixing section D is followed successively by：72/72,56/56,45 °/5/56,90 °/5/56,72/72,32/96 toothed disc,
45 °/5/36,56/56,45 °/5/56,45 °/5/56,56/28L refines the size of material component again in this section
With it is uniform so that the mixing of the material of each component is more uniform.
Section E is vacuum-evacuated to be followed successively by：56/56,96/96,96/96,32/96 toothed disc will be vacuum-evacuated section E rows in this section
Outside the exhaust gas discharge extruder with volatile organic matter gas gone out.
Compacting transportation section F is followed successively by：72/72,56/56,56/56,56/56,56/56, play conveying and supercharging in this section
Effect, establish certain pressure in this section, material made at the die orifice of extruder to have certain consistency, while to material into one
Step mixing, is finally reached the purpose of smooth extruding pelletization.
It is provided with feed opening A1 on the material conveying of barrel and melt zone A, passes through feed opening A1 admixtures into extruder
Expect, exhaust outlet C1 is provided on the exhaust section C of barrel, the impurity such as the steam in extruder and low molecular weight substance are discharged, barrel
It is vacuum-evacuated on section E and is provided with vacuum port E1, vacuum exhaust section E discharges are carried by volatile organic matter gas by vacuum port E1
Outside the exhaust gas discharge extruder of body.
Specifically, every screw rod includes splined shaft and above-mentioned several screw elements, it is equipped with along its axis direction on splined shaft
Several splines, the quantity of spline is consistent with the quantity for the screw element being arranged thereon, and screw element is set on splined shaft, screw element
The position that endoporus corresponds to spline is equipped with spline, and screw element is fixedly connected on by spline and spline on splined shaft.And two
Root screw rod has 90 ° of a phase angle, when real-world operation, two equidirectional rotations of screw rod.
Screw element arrangement on the screw rod of double screw extruder in the prior art is followed successively by：72/72、72/72、D96/
96、D96/96、D96/96、72/72、56/56、56/56、56/56、72/72、45°/5/56、45°/5/56、56/56、56/56、
56/56、90°/5/56、45°/5/36L、96/96、96/96、72/72、72/72、45°/5/36、56/56、45°/5/56、72/
72、56/56、45°/5/56、90°/5/56、72/72、96/96、72/36、56/56、45°/5/56、45°/5/56、56/28L、
56/56、96/96、96/96、96/96、72/72、56/56、56/56、56/56、56/56。
Under the same test conditions, respectively with the twin-screw in double screw extruder in the prior art and the present embodiment
Extruder is tested, and the parameters of obtained PA66 plastics are as shown in table 1：
【Table 1】
| Project | The prior art | The present embodiment |
| Tensile strength MPa | 110 | 120 |
| Bending strength MPa | 143 | 156 |
| Izod notched impact KJ/M2 | 10 | 13 |
| CTI(V) | 350 | 600 |
It should be noted that above-described embodiment can be freely combined as needed.The above is only the utility model
Preferred embodiment, it is noted that for those skilled in the art, do not departing from the utility model principle
Under the premise of, several improvements and modifications can also be made, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (4)
1. a kind of double screw extruder of high CTI flame-retardant PA 66s, which is characterized in that including：
Barrel and two intermeshing screw rods being arranged in barrel；
The barrel is divided into material conveying and melt zone, the first mixing section, exhaust section, the second mixing section, is vacuum-evacuated section
With compacting transportation section；
The screw rod is divided into material conveying and melt zone, the first mixing section, exhaust section, the second mixing section, vacuum corresponding to barrel
Exhaust section and compacting transportation section, and include following screw element successively：
Material conveys and melt zone is followed successively by：72/72、72/72、96/96、96/96、96/96、72/72、56/56、56/56、
56/56；
First mixing section is followed successively by：30°/7/72、45°/5/56、45°/5/56、56/56、45°/5/56、45°/5/56、90°/
5/56、45°/5/36L；
Exhaust section is followed successively by：96/96、96/96、72/72、72/72、45°/5/36、56/56、45°/5/56；
Second mixing section is followed successively by：72/72,56/56,45 °/5/56,90 °/5/56,72/72,32/96 toothed disc, 45 °/5/
36、56/56、45°/5/56、45°/5/56、56/28L；
Section is vacuum-evacuated to be followed successively by：56/56,96/96,96/96,32/96 toothed disc；
Compacting transportation section is followed successively by：72/72、56/56、56/56、56/56、56/56.
2. the double screw extruder of high CTI flame-retardant PA 66s according to claim 1, it is characterised in that：
Two screw rods have 90 ° of phase angle.
3. the double screw extruder of high CTI flame-retardant PA 66s according to claim 1, it is characterised in that：
The screw rod further includes splined shaft, and the screw element is set on the splined shaft and the screw element and the splined shaft
It is connected by spline.
4. the double screw extruder of high CTI flame-retardant PA 66s according to claim 1, it is characterised in that：
It is provided with feed opening on the material conveying of the barrel and melt zone, exhaust outlet is provided on the exhaust section of the barrel, it is described
It is provided with vacuum port in the vacuum exhaust section of barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721634121.7U CN207808439U (en) | 2017-11-30 | 2017-11-30 | A kind of double screw extruder of high CTI flame-retardant PA 66s |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721634121.7U CN207808439U (en) | 2017-11-30 | 2017-11-30 | A kind of double screw extruder of high CTI flame-retardant PA 66s |
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| Publication Number | Publication Date |
|---|---|
| CN207808439U true CN207808439U (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721634121.7U Active CN207808439U (en) | 2017-11-30 | 2017-11-30 | A kind of double screw extruder of high CTI flame-retardant PA 66s |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113561447A (en) * | 2021-07-23 | 2021-10-29 | 南京科亚化工成套装备有限公司 | Double-screw extruder for producing special material for MIT needleless injector shell |
| CN113977908A (en) * | 2021-11-26 | 2022-01-28 | 中化泉州能源科技有限责任公司 | Combined screw of double-screw extruder and process for producing low-odor polyolefin |
-
2017
- 2017-11-30 CN CN201721634121.7U patent/CN207808439U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113561447A (en) * | 2021-07-23 | 2021-10-29 | 南京科亚化工成套装备有限公司 | Double-screw extruder for producing special material for MIT needleless injector shell |
| CN113977908A (en) * | 2021-11-26 | 2022-01-28 | 中化泉州能源科技有限责任公司 | Combined screw of double-screw extruder and process for producing low-odor polyolefin |
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