CN206367177U - A kind of double extruder foaming screw rods of large-scale cone - Google Patents
A kind of double extruder foaming screw rods of large-scale cone Download PDFInfo
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- CN206367177U CN206367177U CN201621458843.7U CN201621458843U CN206367177U CN 206367177 U CN206367177 U CN 206367177U CN 201621458843 U CN201621458843 U CN 201621458843U CN 206367177 U CN206367177 U CN 206367177U
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- screw rod
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- spiral shell
- shell rib
- right screw
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Abstract
The utility model is related to a kind of large-scale extruder foaming cone twin-screw, including feeding section, compression section, metering section, exhaust section and mixing section, also include precommpression section and dynamic mix head, upper in feeding section, precommpression section, compression section, metering section, exhaust section and mixing section is provided with intermeshing spiral shell rib, screw channel is formed between adjacent spiral shell rib, dynamic mix head is provided with intermeshing projection.Compared with prior art, compression section is separated into precommpression section and compression section by the utility model, is improved the draw ratio and residence time of material of screw rod, is improved the efficiency of thermal control in process, the plasticizing of material is completed with minimum stress；Dynamic mix head is set, reduction material from Screw Extrusion when heat, the temperature for being prevented effectively from material raises because of shear heat, and reduction foamed gas precipitate into surface of material；The length of extension cone twin-screw and the diameter of screw rod, increase screw rod volume and surface area, make that more materials can be accommodated in screw rod, improve yield.
Description
Technical field
The utility model is related to a kind of extrusion equipment parts, more particularly, to a kind of double extruders foaming spiral shells of large-scale cone
Bar.
Background technology
In recent years, requirement of the people to plastic products is improved constantly, particularly in terms of energy-conserving and environment-protective, it is desirable to plastics-production
Equipment and technique reduce production cost as far as possible while the use requirement of product is met, and improve resource utilization, realize green
Color is manufactured.And foam plastic due to its lower thermal conductivity, good acoustic damping, be easy to using mechanical means processing, high fire-retardance
Property, the advantage such as the low cost brought of good heat-resisting chemical resistance and its low-density, significantly dropped with the technique of non-foamed compared with
Low consumption of raw materials, reduces environmental pressure.The hard foamed plate appearances of wherein PVC can imitate wooden structures, and same processing characteristics
It is similar to wood, therefore the hard foamed plates of PVC can substitute woodwork to a certain degree, the yield of increase foaming plastic can reduce timber
Felling, environmental protection.
Foaming production equipment has tended to be ripe both at home and abroad at present, wherein anisotropic parallel, the conical double-screw that tightly engage
Extruder is set up not by thing due to the gentle heat and gentle plasticizing, good heat and matter homogenizing, stable pressure of its raw material
The advantage such as material interference and slow-speed of revolution high yield, is widely used in Midst density to the production of high density foaming extrusion equipment.Due to technology
With the limitation of production, using parallel double-screw extruder big yield foaming extrusion equipment more.Domestic maximum taper is double at present
Screw extruder is SJZ80/156 conical double screw extruders, and its yield is about 250kg/h, but this extruder yield
The requirement in market can not be met, the trend that the double foam extrusion machines of large-scale cone are social developments from now on is studied.
Foam screw rod be one of kernel component of extrusion equipment, foaming screw rod main function be by PVC powder through conveying,
Compression, compacting plasticizing, exhaust, the step such as homogenizing metering, are converted into PVC stable uniforms, the finely dispersed plastic cement melt of foaming agent,
Export to mould foaming and subsidiary engine equipment, produce satisfactory foamed products.Therefore, the double extruders of large-scale cone are studied special
Foaming screw rod is the most important thing of the double foam extrusion machines of the large-scale cone of development.
Utility model content
The purpose of this utility model is exactly to provide that a kind of yield is big, efficiency high large-scale cone is double in order to solve the above problems
Extruder foaming screw rod.
The purpose of this utility model is achieved through the following technical solutions：
A kind of large-scale extruder foaming cone twin-screw, is made up of left screw rod and right screw rod, including feeding section, compression section, meter
Section, exhaust section and mixing section, in addition to precommpression section and dynamic mix head are measured, described precommpression section is arranged on feeding section and pressure
Between contracting section, described dynamic mix head is arranged on the end of mixing section, and described left screw rod and right screw rod are in feeding section, precompressed
Contracting section, compression section, metering section, exhaust section and mixing section are provided with intermeshing spiral shell rib, described left screw rod and right screw rod it is dynamic
State mixing head is provided with intermeshing projection.
Further, the projection of the dynamic mix head is that strip is block, and projection is in a row arranged in the surface of cone twin-screw,
Mesh together to the projection mutual dislocation of left screw rod and right screw rod, described projection is set to 6-10 rows, preferably 8 rows often arrange
Axial direction with dynamic mix head periphery is in 60-75 degree angles.
Further, described cone twin-screw outside diameter is 188mm, and end diameter is 92mm, and the length of screw rod is
2800-2900mm。
Further, the feeding section of described cone twin-screw, precommpression section, compression section, metering section, exhaust section, mixing section
And the length ratio of dynamic mix head is：7-7.5：2.5-3：1.5-2：1-1.5：3-4：4-4.5：4-4.5.
Further, described left screw rod and right screw rod feeding section, precommpression section, compression section, metering section, exhaust section,
Pitch ratio between the spiral shell rib of mixing section is 0.5-1：0.5-1：0.5-1：0.2-0.5：1.5-2：1-1.5.
Further, left screw rod is 3-5mm with the axial space engaged between spiral shell rib the distance of right screw rod in feeding section,
Radial space distance between the screw rod of the spiral shell rib and right screw rod or left screw rod of left screw rod or right screw rod is 1-1.8mm, in precompressed
Left screw rod and the spiral shell that the axial space engaged between spiral shell rib the distance of right screw rod is 2.5-4mm, left screw rod or right screw rod in contracting section
Radial space distance between the screw rod of rib and right screw rod or left screw rod is 1-1.6mm, left screw rod and right screw rod on compression section
Engagement spiral shell rib between axial space distance be 2.5-4mm, the spiral shell rib of left screw rod or right screw rod and right screw rod or left screw rod
Radial space distance between screw rod is 1-1.4mm, the axial direction engaged between spiral shell rib of left screw rod and right screw rod on metering section
Space length is 2-4mm, the radial space distance between the spiral shell rib of left screw rod or right screw rod and the screw rod of right screw rod or left screw rod
For 1-1.2mm, left screw rod is 3-6mm, left screw rod with the axial space engaged between spiral shell rib the distance of right screw rod on exhaust section
It is left on mixing section or the radial space distance between the spiral shell rib of right screw rod and the screw rod of right screw rod or left screw rod is 1-1.2mm
Screw rod and spiral shell rib and right spiral shell that the axial space engaged between spiral shell rib the distance of right screw rod is 2.5-4mm, left screw rod or right screw rod
Radial space distance between the screw rod of bar or left screw rod is 1-1.2mm.
Further, described cone twin-screw is made using the thermally treated technique of screw rod steel, is moved back during heat treatment using nodularization
Fire, hardening heat is 900-1000 DEG C, and temperature is 600-700 DEG C, and surface nitride layer is 0.3-0.5mm.
When described cone twin-screw is particularly applicable in extruder, material (such as PVC powder) enters feeding by drawing-in device
Section simultaneously proceeds by incorgruous ∞ rotations；Material feeding section in by frictional heat, and transport material to precommpression section；Material is reached
Continue after precommpression section it is heated forward, and be gradually compacted by loose condition (of surface) and change into melt, and enter compression section；Thing
Material makes material be fully converted to continuous melt by compression section, is advanced forward into metering section；Material becomes after metering section
Plasticizing is uniform, and makes melt quantitative；Material, which enters exhaust section, afterwards will melt generation waste gas discharge, mixed by mixing section and dynamic
Syncephalon, makes material mixing fine and close, is extruded in screw rod.Using above-mentioned extruder, yield can reach 550kg/h, be it is existing on the market
Most 2.2 times or so of auger twin-screw foam extrusion machine SJZ80/156 yield (250kg/h).
Compared with prior art, the beneficial effects of the utility model are：
1st, conventional compression section is separated into precommpression section and compression section, the separation of precommpression section and compression section improves screw rod
Draw ratio and residence time of material, so as to improve the efficiency of thermal control in process, the modeling of material is completed with minimum stress
Change；
2nd, set and the block projection of strip is provided with dynamic mix head, dynamic mix head, it is possible to decrease material is squeezed from screw rod
Heat when going out, the temperature for being prevented effectively from material is raised because of shear heat, and reduction foamed gas precipitate into surface of material；
3rd, the diameter of the length of increase cone twin-screw and screw rod, makes the distance of shaft centers of cone twin-screw and the diameter of feed zone have
Increase, increase screw rod volume and surface area, make that more materials can be accommodated in screw rod, improve yield, and make up raw material change
Change brought influence, will not occur obvious change with the change of material performance in extrusion, for different originals
Material formula has very high adaptability；
4th, reduce the taper of screw rod, improve the efficiency of thermal control in process, make screw rod with minimum stress to complete
The plasticizing of material, stabilizer and modifying agent that only need to be less just can obtain preferably participation stability and impact resistance；
5th, the internal surface area increase of fluxing zone and feed zone, makes raw material have the longer residence time and realize more effective
Heat transfer effect, makes the stress of raw material be reduced to minimum；
6th, the design of narrow and deep screw channel shortens heat transfer distance, and raw material is by soft plasticizing as uniform molten
Body；
7th, cone twin-screw is made using the thermally treated technique of screw rod steel, carries out spheroidizing to disappear in roughing and finishing
De-stress；Heating-up temperature is improved during quenching, the more transformations of retained austenite in screw rod steel are being allowed in the case of not making material cracks
For martensite, so as to increase the hardness of screw rod；Hardening media is improved, the NaCl concentration in water is improved, makes quenching screw rod steel hardness
It is high and uniform, the toughness and plasticity of screw rod is had a certain upgrade, substantially reduce abrasion of the material to screw rod in production, improve
The service life of screw rod.
In addition, the utility model helps to digest coal production capacity, environmental protection reduces the dependence to overseas equipment.Foaming
Production technology is foamed using PVC raw materials, is extracted because PVC raw materials are main from coal, is used high yield
Extruder helps faster to digest a large amount of PVC raw materials of China, so as to digest coal production capacity；The hard foamed plate appearances of PVC can be imitated
Wooden structures, processing characteristics is similar to wood, therefore the hard foamed plates of PVC can substitute woodwork, increase foaming modeling to a certain degree
The yield of material can reduce timber felling, environmental protection.The SJZ92/188 conical double-screws foaming coordinated using this foaming screw rod is squeezed
External large-scale high-end parallel double-screw foam extrusion machine can be replaced by going out machine, and cost is small, and reduction equipment is relied on.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the utility model and existing cone twin-screw comparison diagram schematic diagram；
Fig. 3 is the expanded schematic diagram of the utility model dynamic mix head；
Fig. 4 is close-up schematic view of the present utility model；
In figure：1- feedings section, 2- precommpression section, 3- compression sections, 4- metering sections, 5- exhaust sections, 6- mixing sections, 7- is dynamically mixed
Syncephalon, 8- projections, 9- screw channels, 10- spiral shell ribs, the existing cone twin-screws of a-；B- the utility model bores twin-screw.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of large-scale extruder foaming cone twin-screw, as shown in figure 1, be made up of left screw rod and right screw rod, including feeding section
1st, compression section 3, metering section 4, exhaust section 5 and mixing section 6, in addition to precommpression section 2 and dynamic mix head 7, precommpression section 2 are set
Between feeding section 1 and compression section 2, dynamic mix head 7 is arranged on the end of mixing section 6, and left screw rod and right screw rod are in feeding section
1st, precommpression section 2, compression section 3, metering section 4, exhaust section 5 and mixing section 6 are provided with intermeshing spiral shell rib 10, adjacent spiral shell
Screw channel 9 (reference picture 4) is formed between rib 10, the width of screw channel 9 is pitch, and dynamic mix head 7 is provided with intermeshing projection 8
(reference picture 3), projection 8 is that strip is block, and projection 8 is in a row arranged in the projection on the surface of cone twin-screw, left screw rod and right screw rod
Mesh together to mutual dislocation, projection is set to 6-10 rows, and preferably 8 rows, often arrange and the axial direction of dynamic mix head periphery is in
60-75 degree angles.
Reference picture 2, a is existing cone twin-screw, and b is that the utility model bores twin-screw, and the utility model uses bigger major diameter
Than, the design of more Small Taper, the length of the present embodiment cone twin-screw is 2850mm, bores twin-screw outside diameter 188mm, small end is straight
Footpath 92mm, bores feeding section, precommpression section, compression section, metering section, exhaust section, mixing section and the dynamic mix head of twin-screw
Length ratio is：7-7.5：2.5-3：1.5-2：1-1.5：3-4：4-4.5：4-4.5.Left screw rod is with right screw rod in feeding section, precompressed
Pitch ratio between contracting section, compression section, metering section, exhaust section, the spiral shell rib of mixing section is 0.5-1：0.5-1：0.5-1：0.2-
0.5：1.5-2：1-1.5, left screw rod is 3-5mm with the axial space engaged between spiral shell rib the distance of right screw rod in feeding section,
Radial space distance between the screw rod of the spiral shell rib and right screw rod or left screw rod of left screw rod or right screw rod is 1-1.8mm, in precompressed
Left screw rod and the spiral shell that the axial space engaged between spiral shell rib the distance of right screw rod is 2.5-4mm, left screw rod or right screw rod in contracting section
Radial space distance between the screw rod of rib and right screw rod or left screw rod is 1-1.6mm, left screw rod and right screw rod on compression section
Engagement spiral shell rib between axial space distance be 2.5-4mm, the spiral shell rib of left screw rod or right screw rod and right screw rod or left screw rod
Radial space distance between screw rod is 1-1.4mm, the axial direction engaged between spiral shell rib of left screw rod and right screw rod on metering section
Space length is 2-4mm, the radial space distance between the spiral shell rib of left screw rod or right screw rod and the screw rod of right screw rod or left screw rod
For 1-1.2mm, left screw rod is 3-6mm, left screw rod with the axial space engaged between spiral shell rib the distance of right screw rod on exhaust section
It is left on mixing section or the radial space distance between the spiral shell rib of right screw rod and the screw rod of right screw rod or left screw rod is 1-1.2mm
Screw rod and spiral shell rib and right spiral shell that the axial space engaged between spiral shell rib the distance of right screw rod is 2.5-4mm, left screw rod or right screw rod
Radial space distance between the screw rod of bar or left screw rod is 1-1.2mm.Bore twin-screw and use the thermally treated technique system of screw rod steel
, spheroidizing is used during heat treatment, hardening heat is 900-1000 DEG C, and temperature is 600-700 DEG C, and surface nitride layer is
0.3-0.5mm。
When this cone twin-screw is particularly applicable in into extruder, material (such as PVC powder) enters feeding section by drawing-in device
And proceed by incorgruous ∞ rotations；Material feeding section in by frictional heat, and transport material to precommpression section；Material reaches pre-
Continue behind compression section it is heated forward, and be gradually compacted by loose condition (of surface) and change into melt, and enter compression section；Material
Material is fully converted to continuous melt by compression section, be advanced forward into metering section；Material becomes modeling after metering section
Change uniformly, and make melt quantitative；Material, which enters exhaust section, afterwards will melt generation waste gas discharge, be mixed by mixing section and dynamic
Head, makes material mixing fine and close, is extruded in screw rod, yield can reach 550kg/h, is that the existing foaming of most auger twin-screw on the market is squeezed
Go out 2.2 times or so of machine SJZ80/156 yield (250kg/h).
Claims (9)
1. a kind of large-scale extruder foaming cone twin-screw, is made up of left screw rod and right screw rod, including feeding section, compression section, metering
Section, exhaust section and mixing section, it is characterised in that also including precommpression section and dynamic mix head, described precommpression section is arranged on
Between feeding section and compression section, described dynamic mix head is arranged on the end of mixing section, and described left screw rod and right screw rod exist
Feeding section, precommpression section, compression section, metering section, exhaust section and mixing section are provided with intermeshing spiral shell rib, described left screw rod and
The dynamic mix head of right screw rod is provided with intermeshing projection.
2. a kind of large-scale extruder foaming cone twin-screw according to claim 1, it is characterised in that the dynamic mix head
Projection it is block for strip, projection is in a row arranged in the surface of cone twin-screw, the projection mutual dislocation of left screw rod and right screw rod
Mesh together.
3. a kind of large-scale extruder foaming cone twin-screw according to claim 2, it is characterised in that described projection is set to
6-10 is arranged, and often the axial direction of row and dynamic mix head periphery is in 60-75 degree angles.
4. a kind of large-scale extruder foaming cone twin-screw according to claim 1, it is characterised in that described cone twin-screw
Outside diameter is 188mm, and end diameter is 92mm, and the length of screw rod is 2800-3000mm.
5. a kind of large-scale extruder foaming cone twin-screw according to claim 4, it is characterised in that described cone twin-screw
Feeding section, precommpression section, compression section, metering section, exhaust section, the length ratio of mixing section and dynamic mix head be：7-7.5：
2.5-3：1.5-2：1-1.5：3-4：4-4.5：4-4.5.
6. a kind of large-scale extruder foaming cone twin-screw according to claim 5, it is characterised in that described left screw rod with
Pitch ratio of the right screw rod between feeding section, precommpression section, compression section, metering section, exhaust section, the spiral shell rib of mixing section is 0.5-1：
0.5-1：0.5-1：0.2-0.5：1.5-2：1-1.5.
7. a kind of large-scale extruder foaming cone twin-screw according to claim 6, it is characterised in that the left spiral shell in feeding section
The axial space engaged between spiral shell rib the distance of bar and right screw rod is 3-5mm, the spiral shell rib of left screw rod or right screw rod and right screw rod or
Radial space distance between the screw rod of left screw rod is 1-1.8mm, and left screw rod and right screw rod engages spiral shell rib in precommpression section
Between axial space distance be 2.5-4mm, between the screw rod of the spiral shell rib and right screw rod or left screw rod of left screw rod or right screw rod
Radial space distance is 1-1.6mm.
8. a kind of large-scale extruder foaming cone twin-screw according to claim 7, it is characterised in that the left spiral shell on compression section
Bar and spiral shell rib and right screw rod that the axial space engaged between spiral shell rib the distance of right screw rod is 2.5-4mm, left screw rod or right screw rod
Or the radial space distance between the screw rod of left screw rod is 1-1.4mm, left screw rod and right screw rod engages spiral shell rib on metering section
Between axial space distance be 2-4mm, the footpath between the screw rod of the spiral shell rib and right screw rod or left screw rod of left screw rod or right screw rod
It is 1-1.2mm to space length.
9. a kind of large-scale extruder foaming cone twin-screw according to claim 8, it is characterised in that the left spiral shell on exhaust section
The axial space engaged between spiral shell rib the distance of bar and right screw rod is 3-6mm, the spiral shell rib of left screw rod or right screw rod and right screw rod or
Radial space distance between the screw rod of left screw rod is 1-1.2mm, on mixing section left screw rod and right screw rod engage spiral shell rib it
Between axial space distance be 2.5-4mm, the footpath between the screw rod of the spiral shell rib and right screw rod or left screw rod of left screw rod or right screw rod
It is 1-1.2mm to space length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621458843.7U CN206367177U (en) | 2016-12-29 | 2016-12-29 | A kind of double extruder foaming screw rods of large-scale cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621458843.7U CN206367177U (en) | 2016-12-29 | 2016-12-29 | A kind of double extruder foaming screw rods of large-scale cone |
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| Publication Number | Publication Date |
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| CN206367177U true CN206367177U (en) | 2017-08-01 |
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ID=59393192
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621458843.7U Active CN206367177U (en) | 2016-12-29 | 2016-12-29 | A kind of double extruder foaming screw rods of large-scale cone |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107756761A (en) * | 2017-11-21 | 2018-03-06 | 南京科森挤出装备有限公司 | Parallel double-screw taper thread covers and taper hole cylinder |
| CN107775937A (en) * | 2017-11-21 | 2018-03-09 | 南京科森挤出装备有限公司 | Changeable Lead becomes groove and becomes rib combined type supercharging thread bush |
| CN108247982A (en) * | 2016-12-29 | 2018-07-06 | 上海金湖挤出设备有限公司 | A kind of double extruder foaming screw rods of large-scale cone |
-
2016
- 2016-12-29 CN CN201621458843.7U patent/CN206367177U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247982A (en) * | 2016-12-29 | 2018-07-06 | 上海金湖挤出设备有限公司 | A kind of double extruder foaming screw rods of large-scale cone |
| CN108247982B (en) * | 2016-12-29 | 2020-11-17 | 上海金湖挤出设备有限公司 | Large-scale awl pair of extruder foaming screw rod |
| CN107756761A (en) * | 2017-11-21 | 2018-03-06 | 南京科森挤出装备有限公司 | Parallel double-screw taper thread covers and taper hole cylinder |
| CN107775937A (en) * | 2017-11-21 | 2018-03-09 | 南京科森挤出装备有限公司 | Changeable Lead becomes groove and becomes rib combined type supercharging thread bush |
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