CN101913242A - Round screw-arris plastic extruder screw - Google Patents
Round screw-arris plastic extruder screw Download PDFInfo
- Publication number
- CN101913242A CN101913242A CN2010102586599A CN201010258659A CN101913242A CN 101913242 A CN101913242 A CN 101913242A CN 2010102586599 A CN2010102586599 A CN 2010102586599A CN 201010258659 A CN201010258659 A CN 201010258659A CN 101913242 A CN101913242 A CN 101913242A
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- CN
- China
- Prior art keywords
- screw
- length
- section
- compression section
- screw rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
The invention provides a round screw-arris plastic extruder screw. The screw consists of a conveying section, a transition section, a first compression section and a second compression section, wherein the length of the conveying section is 25 to 35 percent of the effective length of the screw; the length of the transition section is 5 to 8 percent of the effective length of the screw; the length of the first compression section is 40 to 50 percent of the effective length of the screw; and the length of the second compression section is 15 to 20 percent of the effective length of the screw. Both the conveying section and the transition section are equidistant and isobathic double-end screw arrises; two main screw arrises and two secondary screw arrises are arranged in both the first and second compression sections, the lead of the secondary screw arrises is greater than that of the main screw arrises, and two solid-phase channels and two liquid-phase channels are formed; the liquid-phase channels in the first compression section are isobathic, while the solid-phase channels therein are gradually changed in depth, namely the depth thereof is from deep to shallow and is zero at the tail end; both the liquid-phase channels and solid-phase channels in the second compression section are isobathic; and the cross section of the secondary screw arrises is arc. The screw plastics have a higher plasticizing speed and high quality and can be extruded out with low cost, low energy consumption, low temperature and high speed.
Description
Technical field
The invention belongs to the plastics machinery technical field, be specifically related to a kind of round screw-arris plastic extruder screw.
Background technology
Common plastics extruder BM screw rod generally is made up of for three sections transportation section, compression section, metering section.Transportation section, metering section are single head spiral shell rib; Increased a secondary spiral shell rib in the compression section, constituted a solid phase passage and a liquid channel, main spiral shell rib cross sectional shape is a rectangle, and secondary spiral shell rib cross sectional shape also is the square type.Resistance was big when molten plastic was pressed into liquid channel in the screw rod of this structure, solid phase passage, and solid can not in time be separated with melt, and owing to the existence of melt, the shearing force between the material is little in the solid phase passage, and plasticizing rate is slow, and production efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of round screw-arris plastic extruder screw, this screw rod has two compression sections, and two main spiral shell ribs and two secondary spiral shell ribs are all arranged in the compression section; Main spiral shell rib cross sectional shape is a rectangle, and secondary spiral shell rib cross sectional shape is a circular arc.This screw rod plastic plasticizing rate is faster, and quality is higher, can realize that low cost, low energy consumption, low-temperature and high-speed extrude.
The technical solution adopted in the present invention is:
A kind of round screw-arris plastic extruder screw is characterized in that being made of for four sections transportation section, changeover portion, first compression section, second compression section, and transportation section length is that the 25%-35% of screw rod effective length, the 5%-8% that transition section length is the screw rod effective length, 45%-50%, the second compression section length that the first compression section length is the screw rod effective length are the 15%-20% of screw rod effective length.Described screw rod transmission section and changeover portion all adopt equal moment and depth double end spiral shell rib.Two main spiral shell ribs and two secondary spiral shell ribs are all arranged in described screw rod first compression section and second compression section, and secondary spiral shell rib helical pitch is formed two solid phase passages and two liquid channels greater than main spiral shell rib helical pitch.Liquid channel etc. is dark in first compression section, the gradual change of solid phase channel depth, and becoming shallow from depth to the terminal degree of depth is zero; Solid phase passage and liquid channel all are etc. dark in second compression section.Preferred screw zones length is: transportation section length be the screw rod effective length 27%, transition section length is that 7%, the first compression section length of screw rod effective length is that 50%, the second compression section length of screw rod effective length is 16% of screw rod effective length.The further improvement of the present invention part is that described its cross sectional shape of screw pair spiral shell rib is a circular arc.
Because the screw rod transmission section adopts equal moment and depth double end spiral shell rib, can increase plastics thrust forward; The helical pitch of changeover portion double end spiral shell rib can satisfy the transportation section and seamlessly transit to the compression section; There are two main spiral shell ribs and two secondary spiral shell ribs in first compression section, two solid phase passages and two liquid channels have been formed, secondary spiral shell rib helical pitch is greater than main spiral shell rib helical pitch, the solid phase channel depth is gradient to zero from depth to shallow, and liquid channel etc. are dark, and plastics are compressed conveying in four passages, the heating surface area of plastics increases, molten plastic is carried to liquid channel simultaneously two passages, impels the solid phase material to separate fast with the liquid phase material, has accelerated the plasticizing rate of plastics widely; Also there are two main spiral shell ribs and two secondary spiral shell ribs in second compression section, and secondary spiral shell rib helical pitch has been formed two solid phase passages and two liquid channels greater than main spiral shell rib helical pitch, and solid phase passage and liquid channel all are etc. dark, and purpose is to stablize the output pressure of plastics; Its cross sectional shape of screw pair spiral shell rib is a circular arc, can make solid phase passage and liquid channel have only at interval a line every, the plastics of fusion fed distance in liquid channel is short in the solid phase passage like this, resistance is little, can quicken melt and separate immediately with solid material grain, reduce the plastics excessive temperature and raise, realization low temperature is extruded, the instant separation of melt has simultaneously also strengthened the shear ability between the remaining solid material grain, has promoted the melting rate of plastics.
This round spiral shell edge screw, plasticizing effect can be better, and extrusion capacity can be bigger.
Description of drawings
Fig. 1. be circle screw-arris plastic extruder screw structure chart.
Fig. 2 is a screw compression section partial enlarged drawing.
Fig. 3 is screw rod master spiral shell rib and secondary spiral shell rib cross section enlarged drawing
Among the figure: the secondary spiral shell rib in 1-transportation section, 2-changeover portion, 3-first compression section, 4-second compression section, 5-master's spiral shell rib, 6-, 7-solid phase passage 8-liquid channel,
The specific embodiment
With reference to Fig. 1, Fig. 2, Fig. 3, the circle screw-arris plastic extruder screw is made up of transportation section 1, changeover portion 2, first compression section 3, second compression section 4.
The length of transportation section 1 is 27% of screw rod effective length, and the length of changeover portion 2 is that the length of 7%, the first compression section 3 of screw rod effective length is that the length of 50%, the second compression section 4 of screw rod effective length is 16% of screw rod effective length.
Plastics are added by hopper, are fed forward under the thrust of spiral shell rib.Through transportation section 1 and changeover portion 2 compactings and preheating, enter first compression section 3.Two main spiral shell ribs 5 (among the figure with black, white area branch) and two secondary spiral shell ribs 6 (among the figure to deceive, white area branch) are arranged in first compression section 3, secondary spiral shell rib 6 helical pitches are greater than main spiral shell rib 5 helical pitches, and two main spiral shell ribs 5 and two secondary spiral shell ribs 6 are formed two solid phase passages 7 and two liquid channels 8 respectively.Liquid channel 8 grades are dark, and solid phase passage 7 degree of depth are zero to first compression section end degree of depth from depth to shallow, and secondary spiral shell rib 6 its cross sectional shapes are circular arc.Plastics enter in two solid phase passages 7 through transportation section 1 and changeover portion 2 and are heated, compress, and plastics are under powerful shear action, and the surface at first is melted.Rong plastics separate with solid plastic under the effect of pressure, cross secondary spiral shell rib 6 arc surfaces and enter liquid channel 8, continue to be subjected to thermoplastification to pass forward under the promotion of spiral shell rib.Solid phase passage 7 interior remaining solid plastic continue to be sheared under the effect of heating and compression, fusion, finish up to first compression section, solid phase passage 7 is joined with liquid channel 8, and at this moment the solid phase channel width becomes zero, the liquid channel width is maximum, and plastics enter second compression section 4.After plastics enter second compression section, similarly be further plasticized, finally finish the plasticizing overall process and be extruded in the first compression section internal procedure.
Claims (3)
1. round screw-arris plastic extruder screw, it is characterized in that being made of for four sections transportation section, changeover portion, first compression section, second compression section, transportation section length is that the 25%-35% of screw rod effective length, the 5%-8% that transition section length is the screw rod effective length, 45%-50%, the second compression section length that the first compression section length is the screw rod effective length are the 15%-20% of screw rod effective length; Described screw rod transmission section and changeover portion all adopt equal moment and depth double end spiral shell rib; Two main spiral shell ribs and two secondary spiral shell ribs are all arranged in screw rod first compression section and second compression section, and secondary spiral shell rib helical pitch is formed two solid phase passages and two liquid channels greater than main spiral shell rib helical pitch; Liquid channel etc. is dark in first compression section, the gradual change of solid phase channel depth, and becoming shallow from depth to the terminal degree of depth is zero; Solid phase passage and liquid channel all are etc. dark in second compression section.
2. one kind according to the described round screw-arris plastic extruder screw of claim 1, it is characterized in that described transportation section length be the screw rod effective length 27%, transition section length is that 7%, the first compression section length of screw rod effective length is that 50%, the second compression section length of screw rod effective length is 16% of screw rod effective length.
3. one kind according to claim 1 or 2 described round screw-arris plastic extruder screws, it is characterized in that described screw pair spiral shell rib cross sectional shape is a circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102586599A CN101913242B (en) | 2010-08-16 | 2010-08-16 | Round screw-arris plastic extruder screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102586599A CN101913242B (en) | 2010-08-16 | 2010-08-16 | Round screw-arris plastic extruder screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101913242A true CN101913242A (en) | 2010-12-15 |
| CN101913242B CN101913242B (en) | 2012-11-07 |
Family
ID=43320958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102586599A Expired - Fee Related CN101913242B (en) | 2010-08-16 | 2010-08-16 | Round screw-arris plastic extruder screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101913242B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111251576A (en) * | 2020-02-15 | 2020-06-09 | 浙江嘉丞机械有限公司 | Low-torque efficient energy-saving sol screw |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000040690A1 (en) * | 1999-01-07 | 2000-07-13 | Unilever Plc | An extruder and improved process for plodding detergent bar composition |
| CN101774269A (en) * | 2009-12-28 | 2010-07-14 | 广东联塑机器制造有限公司 | High-speed PB tube single screw |
| CN201736433U (en) * | 2010-08-16 | 2011-02-09 | 无锡恒泰电缆机械制造有限公司 | Circular screw arris plastic extruder screw |
-
2010
- 2010-08-16 CN CN2010102586599A patent/CN101913242B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000040690A1 (en) * | 1999-01-07 | 2000-07-13 | Unilever Plc | An extruder and improved process for plodding detergent bar composition |
| CN101774269A (en) * | 2009-12-28 | 2010-07-14 | 广东联塑机器制造有限公司 | High-speed PB tube single screw |
| CN201736433U (en) * | 2010-08-16 | 2011-02-09 | 无锡恒泰电缆机械制造有限公司 | Circular screw arris plastic extruder screw |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111251576A (en) * | 2020-02-15 | 2020-06-09 | 浙江嘉丞机械有限公司 | Low-torque efficient energy-saving sol screw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101913242B (en) | 2012-11-07 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20190816 |