CN202344814U - Extruder screw special for polyethylene thermal contraction film - Google Patents
Extruder screw special for polyethylene thermal contraction film Download PDFInfo
- Publication number
- CN202344814U CN202344814U CN2011203655045U CN201120365504U CN202344814U CN 202344814 U CN202344814 U CN 202344814U CN 2011203655045 U CN2011203655045 U CN 2011203655045U CN 201120365504 U CN201120365504 U CN 201120365504U CN 202344814 U CN202344814 U CN 202344814U
- Authority
- CN
- China
- Prior art keywords
- segment
- screw
- special
- length
- heat shrink
- 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
Links
Images
Classifications
-
- 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
- B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
-
- 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
- B29C48/585—Screws provided with gears interacting with the flow
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to an extruder screw special for a polyethylene thermal contraction film, which is characterized by comprising a screw head part, a gear type homogenizing segment, a screening segment, a compressing segment, a feeding segment, and an assembling segment. The structure layout of the extruder screw special for the polyethylene thermal contraction film is as follow in turn: the first part is the screw head part, the second part is the gear type homogenizing segment, the third part is the screening segment, the fourth part is the compressing segment, the fifth part is the feeding segment, and the sixth part is the assembling segment. The extruder screw has the following advantages that: because the utility model uses the above design scheme, the gear type homogenizing segment replaces the prior single thread type homogenizing segment, the polyethylene flow is stirred on the homogenizing segment to increase the thawing degree of the flow; and in addition, the gear type homogenizing segment also facilitates the increase in the internal pressure, thus a screw channel is ensured to be filled up and compacted, and the stable output of the flow is increased. The screening segment is arranged between the homogenizing segment and the compressing segment to separate the melted material from the unmelted solid and only the melted material is output towards the end. The effective length L of the screw is increased, and the length diameter ratio (L/D) of the screw is designed to be 28-30, so as to ensure the plasticizing and compacting degree of the polyethylene material and prevent the torsion load of the device from being increased due to over large length diameter ratio.
Description
Technical field
The utility model belongs to the flexible packaging film product technique field, particularly relates to the special-purpose extruder screw of a kind of polyethylene heat shrink films.
Background technology
Polyethylene as polyolefine material a kind of by be ethene through a kind of thermoplastic resin that polymerization makes, mainly be divided into low density polyethylene (LDPE) (LDPE), high density polyethylene (HDPE) (HDPE), LLDPE, medium density polyethylene (MDPE).The polyethylene heat shrink films mainly is by extrusion and blow molding processing after a large amount of low melt index low density polyethylene (LDPE)s (LDPE) and a spot of high density density polyethylene (HDPE) blend; Bigger torsion is born in the meeting of screw rod in the process; And the plasticizing capacity to screw rod has higher requirement.
The screw rod that extrusion molding at present is used for processable polymer generally adopts 5 segment structures, comprises screw head, homogenizing zone, compression section, feeding section, load segment, and the ratio (L/D) of the screw rod effective length L of processing of polyolefins and screw diameter D is generally about 25.Process at reality processing polyethylene heat shrink films finds that this kind spiro rod plasticizing effect can not satisfy the product requirement of high-quality polyethylene heat shrink films.
Summary of the invention
The utility model screw rod provides a kind of special-purpose extruder screw with higher plasticizing capacity to the polyethylene heat shrink films for solving the technical problem that exists in the production high quality thin film known technology.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: design the special-purpose extruder screw of a kind of polyethylene heat shrink films, it is characterized in that: comprise screw head, gear type homogenizing zone, mask segments, compression section, feeding section, load segment.
The topology layout of the special-purpose extruder screw of said polyethylene heat shrink films is followed successively by: first is that screw head, second portion are that gear type homogenizing zone, third part are that mask segments, the 4th part are that compression section, the 5th part are that feeding section, the 6th part are load segment.
The special-purpose extruder screw of described polyethylene heat shrink films is characterized in that: the effective length L of the special-purpose extruder screw of said polyethylene heat shrink films is the length summation of screw rod second portion gear type homogenizing zone, third part mask segments, the 4th part compression section and four parts of the 5th part feeding section; The diameter D of the special-purpose extruder screw of said polyethylene heat shrink films is the external diameter of this screw rod; The effective length L of the special-purpose extruder screw of said polyethylene heat shrink films and the draw ratio (L/D) of screw diameter D are 28～30.
The special-purpose extruder screw of described polyethylene heat shrink films, it is characterized in that: described gear type homogenizing zone length is L2; Said gear type homogenizing zone length L 2 is 6.5～7.5 with the ratio (L2/D) of screw diameter D.Described mask segments length is L3; Said mask segments length L 3 is 1.5～2 with the ratio (L3/D) of screw diameter D.Described compression section length is L4; Said compression section length L 4 is 11～15 with the ratio (L4/D) of screw diameter D.Described feeding segment length is L6; Said feeding segment length L5 is 7～7.5 with the ratio (L5/D) of screw diameter D.
The special-purpose extruder screw of described polyethylene heat shrink films is characterized in that: the special-purpose extruder screw of described polyethylene heat shrink films first is that special-purpose extruder screw the 7th part of the described polyethylene heat shrink films of 15mm～20mm is 160mm～200mm for load segment length for screw head length.
Advantage and the good effect that the utlity model has are: because the utility model adopts above-mentioned design; The gear type homogenizing zone is replaced original single screw-type homogenizing zone; Make the polyethylene materials flow take place evenly to stir, thereby increase the fusing degree of materials flow at homogenizing zone; In addition, the gear type homogenizing zone also helps the raising of internal pressure, can guarantee that whereby screw channel is filled and compacting, improves the stable output of materials flow.Increase mask segments in the centre of homogenizing zone and compression section, can melt and unfused solids be left, and melt is exported to the end.Increased screw rod effective length L to greatest extent, design screw slenderness ratio (L/D) is 28～30, has not only guaranteed plasticizing and the compaction rate of polythene material but also can not add the large equipment torque load because of long draw ratio.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Fig. 4 is the C-C cutaway view of Fig. 1.
Among the figure: 1, screw head 2, gear type homogenizing zone; 3, mask segments; 4, compression section 5, feeding section; 6, load segment.
The specific embodiment
For further understanding summary of the invention, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
Enforcement sees also Fig. 1; The special-purpose extruder screw of polyethylene heat shrink films comprises that first is that screw head, second portion are that gear type homogenizing zone, third part are that mask segments, the 4th part are that compression section, the 5th part are that feeding section, the 6th part are load segment.The effective length L of the special-purpose extruder screw of said polyethylene heat shrink films is 28～30 with the ratio of screw diameter D, and in the present embodiment, the effective length L of the special-purpose extruder screw of polyethylene heat shrink films is 30 with the ratio of screw diameter D.
Embodiment sees also Fig. 1; The gear type homogenizing zone length L 2 of the special-purpose extruder screw of described polyethylene heat shrink films is 6.5～7.5 with the ratio (L2/D) of screw diameter D; In the present embodiment, the gear type homogenizing zone length L 2 of the special-purpose extruder screw of polyethylene heat shrink films is 7 with the ratio (L2/D) of screw diameter D.
Embodiment sees also Fig. 1; The special-purpose extruder screw mask segments of described polyethylene heat shrink films length L 3 is 1.5～2 with the ratio (L3/D) of screw diameter D; In the present embodiment, the mask segments length L 3 of the special-purpose extruder screw of polyethylene heat shrink films is 1.5 with the ratio (L3/D) of screw diameter D.
Embodiment sees also Fig. 1; The special-purpose extruder screw of described polyethylene heat shrink films compression section length L 5 is 11～15 with the ratio (L4/D) of screw diameter D; In the present embodiment, the compression section length L 4 of the special-purpose extruder screw of polyethylene heat shrink films is 14 with the ratio (L4/D) of screw diameter D.
Embodiment sees also Fig. 1; The special-purpose extruder screw of described polyethylene heat shrink films transportation section length L 5 is 7～7.5 with the ratio (L5/D) of screw diameter D; In the present embodiment, the transportation section length L 5 of the special-purpose extruder screw of polyethylene heat shrink films is 7.5 with the ratio (L5/D) of screw diameter D.
Through the prescription mixed material, mixed raw material enters into the feeding section of screw rod through the charging aperture of extruder, and plastics still be solid-state in this section, through phase mutual friction between screw rod rotation and the shearing raw material material, carries while compress to heat to the screw compression section.
Raw material gets into the compression section continued through shearing each other between mutual friction mutually between heating and raw material and the raw material, raw material and the screw rod; Progressively compacting is also softening is the mixture of melt and solid; This mixture is slowly carried to mask segments, and big more near mask segments melt content more, solids content is more little.
After raw material got into mask segments, mask segments left the unfused solids of melt with the residue fraction, and the melt part is carried to homogenizing zone, and unfused solid portion is got back to the compression section through adverse current and continued fusing.Melt partly gets into gear homogenizing zone continued plasticizing evenly, and make the flow of melt quantitative, level pressure is stable evenly extrudes through the flow channel of screw head at last.
Claims (4)
1. the special-purpose extruder screw of polyethylene heat shrink films is characterized in that: comprise screw head, gear type homogenizing zone, screw-type homogenizing zone, mask segments, compression section, feeding section, load segment; The topology layout of the special-purpose extruder screw of said polyethylene heat shrink films is followed successively by: first is that screw head, second portion are that gear type homogenizing zone, third part are that mask segments, the 4th part are that compression section, the 5th part are that feeding section, the 6th part are load segment.
2. the special-purpose extruder screw of polyethylene heat shrink films according to claim 2 is characterized in that: the effective length L of the special-purpose extruder screw of said polyethylene heat shrink films is the length summation of screw rod second portion gear type homogenizing zone, third part mask segments, the 4th part compression section and four parts of the 5th part feeding section; The diameter D of the special-purpose extruder screw of said polyethylene heat shrink films is the external diameter of this screw rod; The effective length L of the special-purpose extruder screw of said polyethylene heat shrink films and the draw ratio L/D of screw diameter D are 28～30.
3. the special-purpose extruder screw of polyethylene heat shrink films according to claim 3, it is characterized in that: described gear type homogenizing zone length is L2; Said gear type homogenizing zone length L 2 is 6.5～7.5 with the ratio L2/D of screw diameter D; Described mask segments length is L3; Said mask segments length L 3 is 1.5～2 with the ratio L3/D of screw diameter D; Described compression section length is L4; Said compression section length L 4 is 11～15 with the ratio L4/D of screw diameter D; Described feeding segment length is L6; Said feeding segment length L5 and the ratio L5/D of screw diameter D are 7～7.5.
4. the special-purpose extruder screw of polyethylene heat shrink films according to claim 2 is characterized in that: the special-purpose extruder screw of described polyethylene heat shrink films first is 15mm～20mm for screw head length; Special-purpose extruder screw the 6th part of described polyethylene heat shrink films is 160mm～200mm for load segment length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203655045U CN202344814U (en) | 2011-09-28 | 2011-09-28 | Extruder screw special for polyethylene thermal contraction film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203655045U CN202344814U (en) | 2011-09-28 | 2011-09-28 | Extruder screw special for polyethylene thermal contraction film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202344814U true CN202344814U (en) | 2012-07-25 |
Family
ID=46533841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203655045U Expired - Fee Related CN202344814U (en) | 2011-09-28 | 2011-09-28 | Extruder screw special for polyethylene thermal contraction film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202344814U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI787269B (en) * | 2017-06-22 | 2022-12-21 | 德商克勞斯瑪菲擠壓技術公司 | Extruder screw, extrusion device with extruder screw and method for plasticizing a plastic material |
-
2011
- 2011-09-28 CN CN2011203655045U patent/CN202344814U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI787269B (en) * | 2017-06-22 | 2022-12-21 | 德商克勞斯瑪菲擠壓技術公司 | Extruder screw, extrusion device with extruder screw and method for plasticizing a plastic material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105644074A (en) | High strength wood-plastic coated coextruded composite material and preparation method thereof | |
| CN203580087U (en) | Twin-screw extruder for differential nano material | |
| CN202318878U (en) | Screw rod assembly of double-screw extruder | |
| CN203246062U (en) | Plastic extruder | |
| CN202344814U (en) | Extruder screw special for polyethylene thermal contraction film | |
| CN108099157A (en) | A kind of series circulation flow model plastic extruder | |
| CN213798022U (en) | Special extruder screw for polyethylene heat shrinkable film | |
| CN202344813U (en) | Extruder screw specially used for polyethylene film for packaging | |
| CN201258376Y (en) | Improved plastic-wire drawing machine | |
| CN204505769U (en) | A kind of plastic extruder | |
| CN204505776U (en) | A kind of extruder | |
| CN102241863A (en) | High-impact-resistance modified material containing recycled polystyrene material and preparation method thereof | |
| CN204505770U (en) | A kind of extruder of singe screw | |
| CN103665904A (en) | Manufacturing method of wood-plastic composite material and profiles thereof | |
| CN102776579B (en) | Continuous adjustable and controllable water vapor sealing type double screw rod extruder | |
| CN202623243U (en) | Plastic extruding machine with conical screw | |
| CN203141815U (en) | Screw of single screw extruder | |
| CN204414515U (en) | A kind of injection machine injection screw | |
| CN203110302U (en) | Screw assembly of double-screw extruder and double-screw extruder | |
| CN205853328U (en) | A kind of extruder screw for lazy flow plastic processing | |
| CN206561573U (en) | Colour mixture mixing refining head and the mixing colour mixture screw rod using the colour mixture mixing refining head | |
| CN204076779U (en) | A kind of extrusion screw rod of thermoplastic composite | |
| CN204471820U (en) | A kind of extruder with tubaeform discharging opening | |
| CN220946597U (en) | Special screw rod of high-efficient polyvinyl chloride sheath cable extrusion | |
| CN203974035U (en) | A kind of expanded building blocks twin-screw |
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: 20120725 Termination date: 20140928 |
|
| EXPY | Termination of patent right or utility model |