CN201151186Y - Conical screw of small cone angle for twin-screw plastic extrusion machine - Google Patents
Conical screw of small cone angle for twin-screw plastic extrusion machine Download PDFInfo
- Publication number
- CN201151186Y CN201151186Y CNU2007201991952U CN200720199195U CN201151186Y CN 201151186 Y CN201151186 Y CN 201151186Y CN U2007201991952 U CNU2007201991952 U CN U2007201991952U CN 200720199195 U CN200720199195 U CN 200720199195U CN 201151186 Y CN201151186 Y CN 201151186Y
- Authority
- CN
- China
- Prior art keywords
- screw
- screw rod
- angle
- twin
- conical
- 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
-
- 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
- B29C48/535—Screws with thread pitch varying along the longitudinal axis
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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
Abstract
The utility model relates to a plastic extruder, in particular relates to a screw rod that is used for the dual-screw-rod plastic extruder. A small-taper-angle conical screw rod that is used for the dual-screw-rod plastic extruder comprises a feeding section, a plasticizing section, a compressing section, a discharging section and an extruding section; the screw rod is a small-taper-angle screw rod; the range of the outer taper angle is from 2.30 degrees to 2.62 degrees; the length of the screw rod is 112 percent to 118 percent of the ordinary conical screw rod that is used for the same material transportation; the extruding section of the screw rod is of an equidifferent varied-distance structure; the thread distance becomes larger and larger in the extrusion direction. The screw rod has the advantages of the conical dual screw rod and the parallel dual screw rod, which not only favors the plasticization of the material, but also increases the service life of the machine cylinder and the screw rod.
Description
Technical field
The utility model relates to plastic extruder, particularly twin-screw plastic extruder screw rod.
Background technology
The screw rod of existing twin-screw plastic extruder has two types of conical double-screw and parallel double-screws, and these screw rod designing techniques are generally the secrecy technology of enterprise, and are seldom open.Conical double-screw has three kinds at present: plain edition, and its spiral groove depth is constant along the screw rod total length; Biconial, its spiral groove depth is along the gradual change of screw rod total length; Efficient biconial, its spiral groove depth is along the gradual change of screw rod total length.The screw rod total length generally is divided into five sections by function, i.e. feed zone, fluxing zone, compression section, exhaust section, extruding zone.Efficient biconial screw rod outside cone angle angle is generally 2.9 degree, its draw ratio L/Dm=12～14, and L is the screw rod effective length, Dm=(Dmax+Dmin)/2, i.e. half of big end of taper and end diameter sum.
The utility model content
The purpose of this utility model is to provide a kind of twin-screw plastic extruder small-angle conical screw, and it possesses the advantage of conical double-screw and parallel double-screw simultaneously, has both helped the plasticizing of material, can increase the service life of machine barrel and screw rod again.
The utility model is achieved in that a kind of twin-screw plastic extruder small-angle conical screw, includes feed zone, fluxing zone, compression section, exhaust section, extruding zone, and described screw rod is the small-angle screw rod, and its outside cone angle angular range is 2.40～2.62 degree.
Described spiro rod length be have equal mass transport general conical screw 112%～118%.
Further optimize the pitch parameter, described screw rod extruding zone is an equal difference varying pitch structure, and pitch becomes greatly gradually towards extruding direction, and material is exported at the extruding zone isometric(al).The feed zone of described screw rod, fluxing zone, compression section, exhaust section are the uniform pitch structure.
The utility model compared with prior art has following advantage:
1. the angle of conical double-screw provides bigger two screw rods centre-to-centre spacing, makes branch gear and axial thrust bearing that enough design spaces be arranged, and has guaranteed the safe and reliable of driving member;
2. keep conical double-screw in the big characteristics of the fluxing zone field of conjugate action, made material obtain more the shearing, helped the plasticizing of material;
3. little at the screw rod extruding zone field of conjugate action, reduced shearing to material, avoided like this unnecessary energy output of extruding zone melt;
4. the little screw diameter in extrusion place greatly reduces the screw axial power of back pressure generation, need to be adapted on the mould of high back pressure especially;
5. extended screw rod and barrel length, thus the contact surface that has increased screw rod, machine barrel and material is long-pending, helps the plasticizing of material and to the adaptability of prescription, makes material obtain preheating simultaneously; And, thereby increased the service life of machine barrel and screw rod owing to the screw rod tapering reduces.
Description of drawings
Fig. 1 is the utility model twin-screw plastic extruder small-angle conical screw structural representation;
Among the figure: 1 screw rod, 1a feed zone, 1b fluxing zone, 1c compression section, 1d exhaust section, 1e extruding zone, α outside cone angle, s pitch.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, a kind of twin-screw plastic extruder includes feed zone 1a, fluxing zone 1b, compression section 1c, exhaust section 1d, extruding zone 1e with small-angle conical screw 1, and material enters from feed zone 1a, through fluxing zone 1b, compression section 1c, exhaust section 1d, from extruding zone 1e discharging; This screw rod 1 is a small-angle, and its outside cone angle α angular range is 2.30～2.62 degree, and the outside cone angle α that Fig. 1 shows is 2.50 degree, can select angle else when specifically using, and all can as 2.35 degree, 2.60 degree.Correspondingly, with respect to general conical screw, the corresponding lengthening of present embodiment screw rod 1 length, its length be have equal mass transport general conical screw 112%～118%, but shorter than parallel double-screw length, present embodiment chooses 115%; Draw ratio is generally got L/Dm=16～17.The length of machine barrel also extends adaptably.For further optimizing pitch s, extruding zone is an equal difference varying pitch structure, and pitch s becomes greatly gradually towards extruding direction, helps pressure like this and progressively sets up and the stable output of the isometric(al) of material.The feed zone 1a of screw rod, fluxing zone 1b, compression section 1c, exhaust section 1d are the uniform pitch structure.
Because the utility model had both kept the feature of conical double-screw, while outside cone angle angle is mild, spiro rod length obtains lengthening, the feature that has possessed parallel double-screw again, therefore the utility model has kept conical double-screw in the big characteristics of the fluxing zone 1b field of conjugate action, make material obtain more the shearing, help the plasticizing of material.Little at the extruding zone 1e field of conjugate action, reduced shearing to material, avoided like this unnecessary energy output of extruding zone 1e melt.Extended screw rod 1 and barrel length, the contact surface that has increased screw rod 1, machine barrel and material is long-pending, helps the plasticizing of material and to the adaptability of prescription, makes material obtain preheating simultaneously; And, thereby increased the service life of machine barrel and screw rod 1 owing to screw rod 1 tapering reduces.
Claims (4)
1. a twin-screw plastic extruder small-angle conical screw includes feed zone, fluxing zone, compression section, exhaust section, extruding zone, it is characterized in that: described screw rod is the small-angle screw rod, and its outside cone angle angular range is 2.30～2.62 degree.
2. twin-screw plastic extruder small-angle conical screw according to claim 1 is characterized in that: described spiro rod length be have equal mass transport general conical screw 112%～118%.
3. twin-screw plastic extruder small-angle conical screw according to claim 1 is characterized in that: described screw rod extruding zone is an equal difference varying pitch structure, and pitch becomes big gradually towards extruding direction.
4. twin-screw plastic extruder small-angle conical screw according to claim 3 is characterized in that: the feed zone of described screw rod, fluxing zone, compression section, exhaust section are the uniform pitch structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201991952U CN201151186Y (en) | 2007-12-13 | 2007-12-13 | Conical screw of small cone angle for twin-screw plastic extrusion machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201991952U CN201151186Y (en) | 2007-12-13 | 2007-12-13 | Conical screw of small cone angle for twin-screw plastic extrusion machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201151186Y true CN201151186Y (en) | 2008-11-19 |
Family
ID=40126868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201991952U Expired - Fee Related CN201151186Y (en) | 2007-12-13 | 2007-12-13 | Conical screw of small cone angle for twin-screw plastic extrusion machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201151186Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211393A (en) * | 2011-06-08 | 2011-10-12 | 济南海富塑胶有限公司 | Screw rod suitable for machining of chlorinated ploy vinyl chloride (CPVC) |
| CN102642295A (en) * | 2012-04-26 | 2012-08-22 | 常州诚力机电有限公司 | Pulverizing plasticator |
| CN104690943B (en) * | 2014-03-19 | 2018-04-13 | 保定东禾新型材料科技有限公司 | A kind of extruder conical screw |
| CN108518965A (en) * | 2018-05-03 | 2018-09-11 | 青岛科技大学 | A kind of high-efficiency dehydration drying device for during waste plastics continuous cracking |
-
2007
- 2007-12-13 CN CNU2007201991952U patent/CN201151186Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211393A (en) * | 2011-06-08 | 2011-10-12 | 济南海富塑胶有限公司 | Screw rod suitable for machining of chlorinated ploy vinyl chloride (CPVC) |
| CN102642295A (en) * | 2012-04-26 | 2012-08-22 | 常州诚力机电有限公司 | Pulverizing plasticator |
| CN104690943B (en) * | 2014-03-19 | 2018-04-13 | 保定东禾新型材料科技有限公司 | A kind of extruder conical screw |
| CN108518965A (en) * | 2018-05-03 | 2018-09-11 | 青岛科技大学 | A kind of high-efficiency dehydration drying device for during waste plastics continuous cracking |
| CN108518965B (en) * | 2018-05-03 | 2024-01-12 | 青岛科技大学 | Efficient dehydration drying device for continuous waste plastic cracking process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20100113 |