CN203637143U - Screw in screw extruder for producing polypropylene spinning filaments - Google Patents
Screw in screw extruder for producing polypropylene spinning filaments Download PDFInfo
- Publication number
- CN203637143U CN203637143U CN201320736114.3U CN201320736114U CN203637143U CN 203637143 U CN203637143 U CN 203637143U CN 201320736114 U CN201320736114 U CN 201320736114U CN 203637143 U CN203637143 U CN 203637143U
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- CN
- China
- Prior art keywords
- screw
- screw rod
- length
- section
- diameter
- 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.)
- Expired - Fee Related
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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
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
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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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- 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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/41—Intermeshing counter-rotating screws
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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 screw in a screw extruder for producing polypropylene spinning filaments. A cone-shaped double-screw is used, and the cone-shaped double-screw is divided into four sections in sequence according to diameter from large to small; the four sections comprise a feeding section, a plastifying section, an exhaust section and an extrusion section; diameter of a small end is 35-40mm; diameter of a large end is 60-70mm; length of the feeding section is 35%-40% of an effective length of the screw; length of the plastifying section is 5%-8% of the effective length of the screw; length of the exhaust section is 17%-20% of the effective length of the screw; length of the extrusion section is 30%-35% of the effective length of the screw. The screw is large in diameter of the feeding section, large in volume of screw tank and large in feeding amount; the screw surface area of the feeding section and the screw surface area of the plastifying section are great, thus facilitating cutting and heading of materials; the screw is high in strength and great in system rigidity; large torque distributors and speed changing boxes can be configured; a transmission system is safe and reliable; the screw diameter of the extrusion section is small; the surface area is small; the decomposition of melt caused due to excess temperature which is generated due to excess cutting energy can be effectively avoided; thermal damage risk is small.
Description
Technical field
The utility model relates to a kind of for the production of the screw rod in the screw extruder of polypropylene spinning, belongs to field of machining.
Background technology
Screw rod is one of kernel component of extruder equipment, and twin-screw technology is most important extruding technology progress over 50 years in the past.Single machine of screw rod and the machine of twin-screw: one is a screw rod, and one is two screw rods, is all a driven by motor of use, power is different because of screw rod, and the output of single screw rod just only has half.Extruder can be divided into single screw rod, twin-screw and multi-screw extruder by its screw rod quantity.Single screw extrusion machine is suitable for the processing of extruding of general material at present.Double screw extruder has by fricative heat less, and the suffered shearing of material relatively evenly, the conveying capacity of screw rod is large, extrusion capacity is more stable, material stops and grows in machine barrel, the feature such as mixes.Twin-screw just can obtain high output under low shear rate, has therefore reduced the consumption of expensive stabilizing agent.But when some twin-screw chargings at present, easily there is putty, charging is had some setbacks and easy Jiao's of appearance material phenomenon, and efficient low, and high shortcoming consumes energy.Screw rod is the heart of extruder, and the correctness of Screw Parameters design directly has influence on extruder performance.
Summary of the invention
Main purpose of the present utility model is to provide for the production of the screw rod in the screw extruder of polypropylene spinning, and its feeding quantity is large, is not easy to stop up, and efficiency is high, and energy consumption is low.
In order to achieve the above object, the utility model adopts following technical scheme: a kind of for the production of the screw rod in the screw extruder of polypropylene spinning, it adopts tapered twin-screw, tapered twin-screw is divided into four sections to little greatly successively by diameter: feeding section, fluxing zone, exhaust section and extruding zone, end diameter is 35-40mm, outside diameter is 60-70mm, feeding section is 30%～35% of screw rod effective length, fluxing zone length is 10%～15% of screw rod effective length, exhaust section length accounts for 15%～20% of screw rod effective length, extruding zone length accounts for 35%～40% of screw rod effective length.
As further preferred, tapered twin-screw rotating speed is 30-40 r/min.
As further preferred, the centre-to-centre spacing of described tapered twin-screw small end is 20-60mm.
As further preferred, 1/5～l/4 that the spiral groove depth of described screw head is end diameter, spiral groove depth is along spiro rod length gradual change.
As further preferred, the gap of described screw rod and machine tube inner wall is 0.1-4mm, and radial clearance is 0.3-2mm, and sideshake is 0.9-1.0 mm.
The utility model beneficial effect is as follows: (1) feeding section diameter is large, and screw channel volume is large, and feeding quantity is large; (2) feeding section and fluxing zone screw surface are long-pending larger, and the shearing that is beneficial to material heats up; (3) screw strength is high, and system stiffness is large, can configure larger torque divider and gearbox, and transmission system is safe and reliable; (4) extruding zone screw diameter is little, and surface area is smaller, can effectively prevent from shearing melt temperature that heat surplus causes too high and decompose, and the danger of fire damage is little.
Brief description of the drawings
Fig. 1 is the tapered double-screw structure schematic diagram of the utility model embodiment.
Being described as follows of mark in accompanying drawing: 1-feeding section, 2-fluxing zone, 3-exhaust section, 4-extruding zone.
Detailed description of the invention
Realization, functional characteristics and the beneficial effect of the utility model object, be described further below in conjunction with specific embodiment and accompanying drawing.
Below in conjunction with the drawings and specific embodiments, technical scheme described in the utility model is described in further detail, so that those skilled in the art can better understand the utility model being implemented, but illustrated embodiment is not as to restriction of the present utility model.
As shown in Figure 1, the utility model embodiment is for the production of the screw rod in the screw extruder of polypropylene spinning, it adopts tapered twin-screw, tapered twin-screw is divided into four sections to little greatly successively by diameter: feeding section 1, fluxing zone 2, exhaust section 3 and extruding zone 4, end diameter is 35-40mm, outside diameter is 60-70mm, feeding section 1 is 30%～35% of screw rod effective length, fluxing zone 2 length are 10%～15% of screw rod effective length, exhaust section 3 length account for 15%～20% of screw rod effective length, and extruding zone 4 length account for 35%～40% of screw rod effective length.
Described screw speed is 30-40r/min.
The centre-to-centre spacing of described screw rod small end is 20-60mm.
The spiral groove depth of described screw head is 1/5～l/4 of end diameter, and spiral groove depth is along spiro rod length gradual change.
The gap of described screw rod and machine tube inner wall is 0.1-4mm, and radial clearance is got 0.3-2mm, and sideshake is 0.9-1.0 mm.
Definite principle of screw rod back lash is as follows:
(1) gap of screw rod and machine tube inner wall
This gap can be adjusted by screw axial displacement in tapered twin-screw.In screw design process, determine depending on screw diameter, the screw rod accuracy of manufacture and expanded by heating situation,
(2) radial clearance
Radial clearance is little, and two screw rods is large to the kneading effect of material, plasticizing and good mixing effect, but the melt pressure in gap is high, the extruding force of screw rod and machine barrel is large, easily causes wearing and tearing, and the material by this gap is few, is not necessarily conducive to the raising of overall plasticizing efficiency; Radial clearance is large, and shear rate is low, and calendering effect also declines, but the material passing through is many, stands shearing and calendering effect here.Rule of thumb, radial clearance is generally depending on screw diameter and by screw axis centre-to-centre spacing and axis angle.
(3) sideshake
In the plane forming at two screw rods axis, the gap between two screw rod spiral shell rib sides is called sideshake.Sideshake is little, and material leakage current is little, and transfer efficiency is high; Sideshake is large, and material leakage current is large, can increase mixed effect.Sideshake is relevant with selected radial clearance with screw diameter, generally should make flow resistance and the radial clearance flow resistance approximately equal to material of sideshake to material.
Embodiment 1: tapered twin-screw end diameter is 35mm, outside diameter is 70mm, the draw ratio (L/D) of tapered twin-screw is defined as the ratio of screw rod effective length and average diameter D, screw rod effective length L=716 mm, L/D=13.64, the range of choice of screw head spiral groove depth is 7-8.75mm, the large end spiral groove depth of screw rod h is 14.25mm, screw speed is 30 r/min, screw rod effective length is 716 mm, so feeding section length is chosen between 214.8～250.6 mm, get L1=250 mm, fluxing zone length is chosen between 71.6～107.4 mm, get L2=75 mm.Exhaust section length is chosen between 107.4～143.2 mm, gets L3=140 mm, and extruding zone length is chosen between 250.6-286.4mm, gets L4=251 mm.The gap of described screw rod and machine tube inner wall is 0.25 mm, and radial clearance is generally got 0.5 mm, and sideshake is 0.9mm.
Embodiment 2: tapered twin-screw end diameter is 40mm, outside diameter is 60mm, the draw ratio (L/D) of tapered twin-screw is defined as the ratio of screw rod effective length and average diameter D, L=716 mm, L/D=14.32, the range of choice of screw head spiral groove depth is 7-8.75mm, the large end spiral groove depth of screw rod h is 14mm, screw speed is 40 r/min, screw rod effective length is 716 mm, so feeding section length is chosen between 214.8～250.6 mm, get L1=245 mm, fluxing zone length is chosen between 71.6～107.4 mm, get L2=75 mm.Exhaust section length is chosen between 107.4～143.2 mm, gets L3=130 mm, and extruding zone length is chosen between 250.6-286.4mm, gets L4=266mm.The gap of described screw rod and machine tube inner wall is 1 mm, and radial clearance is generally got 1 mm, and sideshake is 0.9mm.
Claims (5)
1. one kind for the production of the screw rod in the screw extruder of polypropylene spinning, it is characterized in that: in extruder, adopt tapered twin-screw, tapered twin-screw is divided into four sections to little greatly successively by diameter: feeding section, fluxing zone, exhaust section and extruding zone, end diameter is 35-40mm, outside diameter is 60-70mm, feeding section is 30%～35% of screw rod effective length, fluxing zone length is 10%～15% of screw rod effective length, exhaust section length accounts for 15%～20% of screw rod effective length, and extruding zone length accounts for 35%～40% of screw rod effective length.
2. according to claim 1 for the production of the screw rod in the screw extruder of polypropylene spinning, it is characterized in that: tapered twin-screw rotating speed is 30-40 r/min.
3. according to claim 1 for the production of the screw rod in the screw extruder of polypropylene spinning, it is characterized in that: the centre-to-centre spacing of described tapered twin-screw small end is 20-60mm.
4. according to claim 1 for the production of the screw rod in the screw extruder of polypropylene spinning, it is characterized in that: 1/5～l/4 that the spiral groove depth of described screw head is end diameter, spiral groove depth is along spiro rod length gradual change.
5. according to claim 1 for the production of the screw rod in the screw extruder of polypropylene spinning, it is characterized in that: the gap of described screw rod and machine tube inner wall is 0.1-4mm, radial clearance is 0.3-2mm, sideshake is 0.9-1.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320736114.3U CN203637143U (en) | 2013-11-21 | 2013-11-21 | Screw in screw extruder for producing polypropylene spinning filaments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320736114.3U CN203637143U (en) | 2013-11-21 | 2013-11-21 | Screw in screw extruder for producing polypropylene spinning filaments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203637143U true CN203637143U (en) | 2014-06-11 |
Family
ID=50868420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320736114.3U Expired - Fee Related CN203637143U (en) | 2013-11-21 | 2013-11-21 | Screw in screw extruder for producing polypropylene spinning filaments |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203637143U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016018A (en) * | 2018-01-04 | 2018-05-11 | 武军 | A kind of pulsation plasticizing screw rod based on volume deformation |
-
2013
- 2013-11-21 CN CN201320736114.3U patent/CN203637143U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016018A (en) * | 2018-01-04 | 2018-05-11 | 武军 | A kind of pulsation plasticizing screw rod based on volume deformation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20141121 |
|
| EXPY | Termination of patent right or utility model |