CN202519370U - Screw rod of extrusion press - Google Patents
Screw rod of extrusion press Download PDFInfo
- Publication number
- CN202519370U CN202519370U CN 201220098325 CN201220098325U CN202519370U CN 202519370 U CN202519370 U CN 202519370U CN 201220098325 CN201220098325 CN 201220098325 CN 201220098325 U CN201220098325 U CN 201220098325U CN 202519370 U CN202519370 U CN 202519370U
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- screw rod
- screw
- mixing section
- mixing
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Abstract
The utility model discloses a screw rod of an extrusion press, comprising a material charging section, a compression section and a metering section in order, as well as comprising a mixing section of which the surface is provided with a flow division element, wherein the mixing section is located between the compression section and the metering section. With adoption of the screw rod of the extrusion press provided by the utility model, the flow direction of a molten melt pushed by a screw channel through the compression section is changed; consequently, the mixing probability of a liquid is increased, and the heat exchange between a solid phase and a liquid phase is modified. Therefore, un-molten solid block masses are thinned, molten and homogenized; the subsequent spinning is performed; and the spinning quality is guaranteed.
Description
Technical field
The utility model relates to the mechanical field of processing solid resin material, and the solid thermoplastics resin that particularly is used for so that degree of crystallinity is high, spinning temperature is low is the extruder screw of raw material.
Background technology
Screw extruder is made up of transmission system, speed change system, extrusion system, heating system, machine frame system and control system.Under the certain situation of job specification, output and complete machine characteristic, processing object is particularly important.For the polymer with different qualities is that raw material is used for spinning, and the architectural feature of corresponding screw rod also has nothing in common with each other, i.e. can the characteristic of the polymer spinning production that will directly have influence on high polymer move.Therefore must under the prerequisite of guaranteeing to prepare the melt that is suitable for the spinning technique requirement, carry out the screw-rod structure design.And the characteristic of the material that spins all will directly have influence on the overall construction design of screw rod like the parameters such as thermal conductivity of the viscosity of melt, density, melt temperature, melt.
When spinning the solid resin material that degree of crystallinity is high, spinning temperature is low; High density polyethylene (HDPE) for example, because the raw material self-characteristic, raw material is behind compression section compression, heating and melting; Still contain the not fusion and the complete particle of fusion not; Cause melt inhomogeneous, cause being difficult to obtain metering and homogenizing at metering section, thus the problem that makes follow-up spinning quality can not get guaranteeing.
The utility model content
The utility model technical problem to be solved provides a kind of extruder screw; Solution is that raw material is when carrying out melt spinning at the solid resin material high with degree of crystallinity, that spinning temperature is low; Adopt the common PET spinning screw, behind compression section compression, heating and melting, still contain more particle and do not get transformed into melt; Also still be difficult to complete fusion at metering section, thus the problem that makes follow-up spinning quality can not get guaranteeing.
For solving the problems of the technologies described above, the utility model provides a kind of extruder screw, comprises feed zone, compression section and metering section successively, also comprises the mixing section that there is vent diverter on the surface simultaneously, and it is between compression section and metering section.
Further, said mixing section is provided with cylindrical pins; The screw rod body that is positioned at mixing section has the hole, and said cylindrical pins is through this hole and screw rod body interference fit, and said cylindrical pins is positioned at the vent diverter of the extra-organismal part of screw rod as said mixing section simultaneously.
Further, the vent diverter shape of said mixing section comprises rhombus, taper shape or triangle.
Further, said screw rod length is 33 times of the screw rod external diameter, and said feed zone is 9 times of screw rod external diameter, and said compression section is 8 times of screw rod external diameter.
Further, said mixing section is 1: 3 with the length ratio of metering section.
The extruder screw that the utility model provides is positioned at mixing section in the metering section end by routine and moves to compression section and metering section intersection, so as to changing the direction of melt flows; The friendship that increases fluid mixes probability, improves solid phase and liquid phase heat exchange, makes not molten solid mass fined; Promote the fusion of solid particles floating; And then making material be able to sufficient fusion, plasticizing evenly makes follow-up spinning quality be able to guarantee.
Below in conjunction with accompanying drawing and embodiment, the principle of the utility model is described further.
Description of drawings
The segmentation sketch map of the extruder screw that Fig. 1 provides for the utility model embodiment;
The partial structurtes sketch map of the extruder screw that Fig. 2 provides for the utility model embodiment.
The specific embodiment
The extruder screw that the utility model embodiment is provided is used for the melt spinning of high density polyethylene (HDPE), is 4 according to its melt index, 200 ℃ to 250 ℃ of spinning temperatures, density 0.94kg/m
3To 0.96kg/m
3, and performances such as the rheological characteristic of material, thermal capacitance property are designed the screw rod of suitable melt-spun polyethylene monofilament.
Referring to Fig. 1 and Fig. 2, the extruder screw that the utility model embodiment provides, the screw-rod structure main body comprises feed zone 1, compression section 2, mixing section 3 and metering section 4 successively.Said feed zone 1 such as is at dark root footpath; Said compression section 2 is that root footpath gradual change increases, and screw channel shoals gradually; Said metering section 4 such as is at dark root footpath; Decide with the present position in 3 footpaths of said mixing section, and while mixing section 3 is positioned at metering section 4 ends by routine and moves to compression section 2 and metering section 4 intersections.The draw ratio of said screw rod is 33: 1, and compression ratio is 2.35.Said screw rod length is 33 times of the screw rod external diameter, and said feed zone 1 is 9 times of screw rod external diameter, and said compression section 2 is 8 times of screw rod external diameter.Said mixing section 3 is 1: 3 with the length ratio of metering section 4.Said mixing section 3 comprises vent diverter 5.
Said mixing section 3 can be provided with cylindrical pins, and said mixing section 3 is provided with cylindrical pins; The screw rod body that is positioned at mixing section 3 has the hole, and said cylindrical pins is through this hole and screw rod body interference fit, and said cylindrical pins is positioned at the vent diverter 5 of the extra-organismal part of screw rod as said mixing section 3 simultaneously.
In addition, the shape of the vent diverter 5 of said mixing section 3 also can adopt rhombus, triangle, taper shape etc., for example adopts diamond shaped.Simultaneously, vent diverter 5 also can be processed by the spiral shell rib 7 of screw rod.
Below be the operation principle of the utility model:
Material is extruded in screw channel 6 with screw spiral, thereby moves forward spirally.In motion process, material is being conducted fusion under heating and the effect of material self shear heat by external heater through swivel nut heat simultaneously gradually, and becomes the molten state melt by solid gradually.At feed zone 1, material is gradually by preheating; Get into compression section 2, material is with the temperature fusing gradually that raises, and the solid phase width of material dwindles gradually, and the liquid phase width is extended to complete fusion gradually, is full of whole screw channels 6, and shoals gradually and be compressed with screw channel 6; After getting into mixing section 3, the fusion melt is done further mixing homogenizing, change the distribution of no cofusing particle, increase the heat friendship and mix probability; Material gets into metering section 4 at last, and unfused material is also made further fusion, plasticizing, metering and homogenizing, so that the melt of output is even, stablize the pressure that the melt extruding exports, and is convenient to follow-up spinning.
The extruder screw that the utility model embodiment provides is that to be used for the high density polyethylene (HDPE) be that raw material carries out melt spinning, has made following improvement:
At first, distinguish to some extent at the section length of screw rod; Second point moves to mixing section 3 between compression section 2 and the metering section 4; Thirdly, the vent diverter 5 of mixing section 3 is used diamond shaped instead, distributes along the screw bull.Its role is to, change through the compression section flow direction of the fusion melt that 2 screw channel 6 pushes, the friendship that increases fluid mixes probability; Improve solid phase and liquid phase heat exchange, make not molten solid mass fined, promote the fusion of solid particles floating; And then making material be able to sufficient fusion, plasticizing evenly gets into metering section 4 further homogenizing again, measures and extrude; Obtain the melt of suitable fully spinning, make follow-up spinning quality be able to guarantee.The diamond shaped vent diverter that adopts of mixing section 3 simultaneously is that the spiral shell rib 7 by screw rod processes, and is convenient to processing, does not have the circulation dead angle, does not have material lagging, can not produce the material carbonization phenomenon, helps the continuous operation of spinning line.
It should be noted last that; The above specific embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to instance the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the spirit and the scope of the utility model technical scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (5)
1. an extruder screw comprises feed zone, compression section and metering section successively, also comprises the mixing section that there is vent diverter on the surface simultaneously, it is characterized in that said mixing section is between compression section and metering section.
2. extruder screw as claimed in claim 1 is characterized in that said mixing section is provided with cylindrical pins; The screw rod body that is positioned at mixing section has the hole, and said cylindrical pins is through this hole and screw rod body interference fit, and said cylindrical pins is positioned at the vent diverter of the extra-organismal part of screw rod as said mixing section simultaneously.
3. extruder screw as claimed in claim 1 is characterized in that, said vent diverter shape comprises rhombus, taper shape or triangle.
4. like each described extruder screw of claim 1 to 3, it is characterized in that said screw rod length is 33 times of the screw rod external diameter, said feed zone is 9 times of screw rod external diameter, and said compression section is 8 times of screw rod external diameter.
5. like each described extruder screw of claim 1 to 3, it is characterized in that said mixing section is 1:3 with the length ratio of metering section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220098325 CN202519370U (en) | 2012-03-15 | 2012-03-15 | Screw rod of extrusion press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220098325 CN202519370U (en) | 2012-03-15 | 2012-03-15 | Screw rod of extrusion press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202519370U true CN202519370U (en) | 2012-11-07 |
Family
ID=47102330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220098325 Expired - Lifetime CN202519370U (en) | 2012-03-15 | 2012-03-15 | Screw rod of extrusion press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202519370U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534819A (en) * | 2012-03-15 | 2012-07-04 | 北京中丽制机工程技术有限公司 | Extruder screw |
-
2012
- 2012-03-15 CN CN 201220098325 patent/CN202519370U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534819A (en) * | 2012-03-15 | 2012-07-04 | 北京中丽制机工程技术有限公司 | Extruder screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Na Zhiyu Inventor after: Ren Yuguo Inventor after: Liu Kailiang Inventor after: Long Jiao Inventor after: Li Xiubin Inventor after: Liu Xin Inventor before: Na Zhiyu Inventor before: Liu Kailiang Inventor before: Long Jiao Inventor before: Li Xiubin Inventor before: Liu Xin |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: NA ZHIYU LIU KAILIANG LONG JIAO LI XIUBIN LIU XIN TO: NA ZHIYU REN YUGUO LIU KAILIANG LONG JIAO LI XIUBIN LIU XIN |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |