CN102922715A - Charging device and twin-screw extruder provided with the same - Google Patents
Charging device and twin-screw extruder provided with the same Download PDFInfo
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- CN102922715A CN102922715A CN2012104486096A CN201210448609A CN102922715A CN 102922715 A CN102922715 A CN 102922715A CN 2012104486096 A CN2012104486096 A CN 2012104486096A CN 201210448609 A CN201210448609 A CN 201210448609A CN 102922715 A CN102922715 A CN 102922715A
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Abstract
The invention provides a charging device and a twin-screw extruder provided with the same, wherein the charging device is used for extrusion molding and comprises a hopper, a material blender, a feeding device and a tremie pipe, wherein an opening is arranged at the bottom of the hopper and used for containing material powder; the material blender is arranged on the opening and used for stirring the material powder; the feeding device is communicated with the material blender so as to deliver the material powder after being stirred, and the feeding device comprises a feeding pipeline, a feeding threaded rod supported in the feeding pipeline in a hanging mode, and a feeding motor connected with the feeding threaded rod; and the tremie pipe is obliquely communicated with the feeding pipeline, and section opening at the communicated position is larger than an outlet of the tremie pipe. The charging device and the twin-screw extruder provided with the same avoid machining interruption, machine halt and the like of equipment due to the fact that lead powder materials cannot enter the interior of rough grain equipment, ensures operational stability of the extruder, reduces failure rate, and effectively improves performance of machined products.
Description
Technical field
The present invention relates to the extrusion technology field, and be particularly related to a kind of feeding device and have the double screw extruder of this feeding device.
Background technology
Extruding-out process is suitable for all macromolecular materials.Almost can all thermoplastics of moulding, also can be used for thermosetting plastics, but only limit to a few thermosetting plasticses such as phenolic aldehyde.The goods of plastic extrusion have the compound of tubing, sheet material, bar, sheet material, film, monofilament, cable clad, various profile shapes and plastics and other material etc.At present approximately 50% thermoplastic articles by extrusion molding.Expressing technique also is usually used in the blending and modifying etc. of painted, mixing, plasticizing, granulation and the plastics of plastics in addition, take extrusion molding as the basis, cooperate the technology such as inflation, stretching, develop into again and extrude a blow molding and extrude the goods such as tentering moulding manufacturing hollow blow molding and biaxially oriented film.As seen extrusion molding is most important method in the forming polymer.
Double screw extruder is widely used in the extrusion technology field, the filling of macromolecular materials such as general-purpose plastics, engineering plastics, thermoplastic elastomer, enhancing, the blending and modifying such as toughness reinforcing, and the manufacture field such as special fibre, special adhesive.
Yet in the feeding device of the double screw extruder that uses at present, see also Fig. 1, material powder in the hopper 110 carries out feeding after stirring via blender 140, feeding spiro rod 120 will expect that under the drive of feeding motor 130 powder pushes forward along feed pipe 150, until the tremie pipe 160 vertical with feed pipe 150 enters in the subsequent granulation equipment.Owing to being vertical an angle of 90 degrees with feed pipe 150 with tremie pipe 160; pushing into the damping of tremie pipe 160 of material powder is very large; charging length is very long; cause feeding spiro rod 120 powder in the process of pushing to generate heat; powder is bonded at causes powder can not enter in the rough grain equipment on the feeding spiro rod 120, cause equipment processing to interrupt shutting down.
Summary of the invention
In view of this, the present invention is intended to solve the disappearance that prior art is intended to solve prior art.
The invention provides a kind of feeding device, be used for extrusion molding, it comprises: hopper, and its bottom has opening, with splendid attire material powder; Blender is arranged at described opening part, to stir described material powder; Pay-off is communicated with described blender, and to carry the described material powder after stirring, it comprises charging line, outstanding the feeding spiro rod in described charging line, and the feeding motor that is connected with described feeding spiro rod; Tremie pipe tilt to be communicated with described charging line, and the cross section opening of connectivity part exports greater than tremie pipe.
Further, described tremie pipe is the straight tube pipe.
Further, described tremie pipe is conical pipe.
Further, described hopper is conical or square taper.
The present invention also provides a kind of double screw extruder, and it comprises: aforesaid feeding device; Barrel is connected with described feeding device; Outstanding central authorities at barrel of twin-screw coincide with the barrel center line, and and barrel between have the gap.
Further, described twin-screw is the engagement type parallel dual-screw.
Further, described twin-screw is the engagement type Heterodromy double-screw.
Further, described twin-screw is non-intermeshing counter-rotating twin-screw.
Further, described twin-screw is conical double-screw.
In sum; feeding device provided by the invention and have the double screw extruder of this feeding device; in reinforced process; reduced the charging damping of feed worm; reduced charging length; reduce the heating of feeding spiro rod powder in the process of pushing; avoided powder to stick on the feeding spiro rod; and then avoided leading powder and can not enter in the rough grain equipment; cause equipment processing to interrupt the problems such as shutdown; guarantee the stability of extruder operation, reduced fault rate, effectively improved the performance of converted products.
Description of drawings
Figure 1 shows that the structural representation of the feeding device of extrusion molding in the prior art;
Figure 2 shows that the structural representation of the feeding device of the extrusion molding that one embodiment of the invention provides;
Figure 3 shows that the structural representation of the feeding device of the extrusion molding that another embodiment of the present invention provides.
The specific embodiment
For purpose of the present invention, feature are become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is further described.
See also Fig. 2, it is depicted as the structural representation of the feeding device of the extrusion molding that one embodiment of the invention provides.
This feeding device is used for extrusion molding, and it comprises: hopper 210, and its bottom has opening, with splendid attire material powder; Blender 220 is arranged at described opening part, to stir described material powder; Pay-off 230 is communicated with described blender 220, and to carry the described material powder after stirring, it comprises charging line 231, outstanding the feeding spiro rod 232 in described charging line, and the feeding motor 233 that is connected with described feeding spiro rod 232; Tremie pipe 240 tilt to be communicated with described charging line 231, and the cross section opening of connectivity part is greater than tremie pipe 240 outlets.
In embodiments of the present invention, described tremie pipe 240 is conical pipe.
In another embodiment of the present invention, described blanking 240 ' pipe is the straight tube pipe.
Further, described hopper 210 is conical or square taper.
The embodiment of the invention also provides a kind of double screw extruder, and it comprises: the as above feeding device described in the embodiment; Barrel is connected with described feeding device; Outstanding central authorities at barrel of twin-screw coincide with the barrel center line, and and barrel between have the gap.
In the present embodiment, barrel is the metallic cylinder of the pressurized that is heated.The plasticizing of material and compression are all carried out in barrel.Operating temperature during extrusion molding is generally at 180～290 ℃, and pressure can reach 60MPa in the barrel.Be provided with the heating and cooling device in the outside of barrel.Three to four sections of general minute of heating, resistance commonly used or inductive heater also have and adopt FAR INFRARED HEATING.The purpose of cooling is must cool off in order to avoid the degraded of plastics fast plastics when preventing the overheated of plastics or parking.Cooling is generally with air-cooled or water-cooled.Barrel must bear high pressure, requires to have enough strength and stiffness, inner wall smooth.Barrel generally makes plastics overheated with wear-resisting, corrosion resistant plastic friction, allows simultaneously the screw surface temperature a little less than barrel, prevents that material from adhering on it, is beneficial to the conveying of material.
In the present embodiment, twin-screw coincide with the barrel center line with outstanding central authorities at barrel of thrust bearing, and obvious deviation does not have.The gap of screw rod and barrel is very little, makes plastics be subject to powerful shear action and plastifies and promote forward.
By the reducing gear transmission, rotating speed is generally 10～120r/min to screw rod by motor, and requirement is infinitely variable speeds.
In the embodiment of the invention, described twin-screw is the engagement type parallel dual-screw.
Because co-rotating twin screw is opposite in the speed of engagement place, a screw rod will be drawn in the back lash to material, and another root screw rod is released material from the gap, and the result makes material forward another root screw rod to from a screw rod, is " ∞ " shape and advances.Because the gap, region of engagement is very little, the velocity attitude of engagement place screw thread and screw channel is opposite, therefore has very high shear rate, good self-cleaning action is arranged, can scrape off any buildup that sticks on the screw rod, thereby make the time of staying of material very short, so the engagement type parallel dual-screw extruding machine is main multiplex in mixing and granulation.
In the embodiment of the invention, described twin-screw is the engagement type Heterodromy double-screw.
In the intermeshing counter-rotating twin-screw extruder, two screw rods are symmetrical, because direction of rotation is different, material spiral way forward is blocked by the spiral shell rib of another root screw rod on the screw rod, can not form the motion of " ∞ " font.In the Solid Conveying and Melting part, material is that the form of airtight " C " shape cell of being similar to is fed forward.But in the design root of the external diameter of a screw rod and another root screw rod is left certain gap value between directly, in order to material can be passed through.Material be subject to strong shearing, stirring and calendering effect, so material plasticizing is better during by the radial clearance between the two screw rods, and it obtains compression ratio by reducing gradually pitch simultaneously, and is multiplex in fabricated product.
In the embodiment of the invention, described twin-screw is non-intermeshing counter-rotating twin-screw.
Application is lacked than engagement type, and its working mechanism is different from engagement type, but is similar to single screw extrusion machine, namely by friction, viscous drag convey materials.Material also has multiple liquid form except to heading motion because two screw rods do not mesh, between radial clearance larger, have larger leakage current; Because the relative position of two screw rods spiral shell rib staggers, namely the material pressure of the thrust face of a screw rod flows thereby produce greater than the material pressure of another root screw rod towing face, and namely material is from higher screw rod thrust face the flowing to another root screw rod towing face of pressure; Hindered with screw rod rotation material simultaneously herein, produce and flow and other multiple liquid forms, so at aspects such as batch mixing, exhaust, devolatilizations certain application is arranged.
In the embodiment of the invention, described twin-screw is conical double-screw.
The volume of a series of C shapes chamber that is formed by two screw rods and machine barrel is reduced gradually by feeding section to discharging section, can add the larger granular material of volume at feeding section, and along with screw rod diminishes, material is compressed, melting.At discharging section, because screw diameter is little, the screw rod peripheral speed is little, therefore the shear rate that material here bears is lower, the frictional heat of generation is also little, is fit to the processing heat sensitive material, so be mainly used in the processing PVC powder, directly is processed into goods.
In sum; the feeding device that the embodiment of the invention provides and have the double screw extruder of this feeding device; in reinforced process; reduced the charging damping of feed worm; reduced charging length; reduce the heating of feeding spiro rod powder in the process of pushing; avoided powder to stick on the feeding spiro rod; and then avoided leading powder and can not enter in the rough grain equipment; cause equipment processing to interrupt the problems such as shutdown; guarantee the stability of extruder operation, reduced fault rate, effectively improved the performance of converted products.
Although the present invention discloses as above with preferred embodiment; so it is not to limit the present invention; have in the technical field under any and usually know the knowledgeable; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (9)
1. a feeding device is used for extrusion molding, it is characterized in that, comprising:
Hopper, its bottom has opening, with splendid attire material powder;
Blender is arranged at described opening part, to stir described material powder;
Pay-off is communicated with described blender, and to carry the described material powder after stirring, it comprises charging line, outstanding the feeding spiro rod in described charging line, and the feeding motor that is connected with described feeding spiro rod;
Tremie pipe tilt to be communicated with described charging line, and the cross section opening of connectivity part exports greater than tremie pipe.
2. feeding device according to claim 1 is characterized in that, described tremie pipe is conical pipe.
3. feeding device according to claim 1 is characterized in that, described tremie pipe is the straight tube pipe.
4. feeding device according to claim 1 is characterized in that, described hopper is conical or square taper.
5. a double screw extruder is characterized in that, comprising:
Such as each described feeding device of claim 1 to 4;
Barrel is connected with described feeding device;
Outstanding central authorities at barrel of twin-screw coincide with the barrel center line, and and barrel between have the gap.
6. double screw extruder according to claim 5 is characterized in that, described twin-screw is the engagement type parallel dual-screw.
7. double screw extruder according to claim 5 is characterized in that, described twin-screw is the engagement type Heterodromy double-screw.
8. double screw extruder according to claim 5 is characterized in that, described twin-screw is non-intermeshing counter-rotating twin-screw.
9. double screw extruder according to claim 5 is characterized in that, described twin-screw is conical double-screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104486096A CN102922715A (en) | 2012-11-09 | 2012-11-09 | Charging device and twin-screw extruder provided with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104486096A CN102922715A (en) | 2012-11-09 | 2012-11-09 | Charging device and twin-screw extruder provided with the same |
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| CN102922715A true CN102922715A (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104486096A Pending CN102922715A (en) | 2012-11-09 | 2012-11-09 | Charging device and twin-screw extruder provided with the same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107901338A (en) * | 2017-11-24 | 2018-04-13 | 宁波海太工贸有限公司 | Injection molding machine feed preparation unit |
| CN107901376A (en) * | 2017-11-17 | 2018-04-13 | 扬州利贞复合材料有限公司 | A kind of blanking device of Modified plastic extruder |
| CN108858654A (en) * | 2018-06-21 | 2018-11-23 | 浙江尚元塑木制品有限公司 | The device of modeling wood composite board is made using corn stover |
| CN111016132A (en) * | 2019-12-06 | 2020-04-17 | 浙江理工大学 | Double-screw extruder for preparing master batches with temperature adjusting function |
| CN113001838A (en) * | 2021-03-02 | 2021-06-22 | 南丰县乾泰再生资源回收利用有限公司 | Even heating device to polyester chip |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101513701A (en) * | 2009-04-07 | 2009-08-26 | 康术森 | High accuracy compulsory powder feeding device applied to welding cladding machine |
| CN201824547U (en) * | 2010-10-27 | 2011-05-11 | 上海纽克新材料科技有限公司 | Powder feeding device of screw extruder |
| CN202965145U (en) * | 2012-11-09 | 2013-06-05 | 上海长园电子材料有限公司 | Material feeding device for extruder and double-screw extruder |
-
2012
- 2012-11-09 CN CN2012104486096A patent/CN102922715A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101513701A (en) * | 2009-04-07 | 2009-08-26 | 康术森 | High accuracy compulsory powder feeding device applied to welding cladding machine |
| CN201824547U (en) * | 2010-10-27 | 2011-05-11 | 上海纽克新材料科技有限公司 | Powder feeding device of screw extruder |
| CN202965145U (en) * | 2012-11-09 | 2013-06-05 | 上海长园电子材料有限公司 | Material feeding device for extruder and double-screw extruder |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107901376A (en) * | 2017-11-17 | 2018-04-13 | 扬州利贞复合材料有限公司 | A kind of blanking device of Modified plastic extruder |
| CN107901338A (en) * | 2017-11-24 | 2018-04-13 | 宁波海太工贸有限公司 | Injection molding machine feed preparation unit |
| CN107901338B (en) * | 2017-11-24 | 2019-11-19 | 宁波海太工贸有限公司 | Injection molding machine feed preparation unit |
| CN108858654A (en) * | 2018-06-21 | 2018-11-23 | 浙江尚元塑木制品有限公司 | The device of modeling wood composite board is made using corn stover |
| CN111016132A (en) * | 2019-12-06 | 2020-04-17 | 浙江理工大学 | Double-screw extruder for preparing master batches with temperature adjusting function |
| CN113001838A (en) * | 2021-03-02 | 2021-06-22 | 南丰县乾泰再生资源回收利用有限公司 | Even heating device to polyester chip |
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Application publication date: 20130213 |