CN202357423U - Screw used in double-screw foam extruder - Google Patents
Screw used in double-screw foam extruder Download PDFInfo
- Publication number
- CN202357423U CN202357423U CN2011205473056U CN201120547305U CN202357423U CN 202357423 U CN202357423 U CN 202357423U CN 2011205473056 U CN2011205473056 U CN 2011205473056U CN 201120547305 U CN201120547305 U CN 201120547305U CN 202357423 U CN202357423 U CN 202357423U
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- China
- Prior art keywords
- screw
- section
- screw rod
- twin
- spiral shell
- 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 - Lifetime
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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
- B29C48/54—Screws with additional forward-feeding elements
-
- 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
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/565—Screws having projections other than the thread, e.g. pins
-
- 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
- B29C48/575—Screws provided with elements of a generally circular cross-section for shearing the melt, i.e. shear-ring elements
-
- 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
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
- B29C48/615—Threads having varying helix angles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a screw used in a double-screw foam extruder. The screw comprises a screw body, wherein the screw body consists of a feeding section, a compression section, a plasticization section, an exhaust section, a mixing section and an extrusion section in sequence; the feeding section, the compression section, the plasticization section, the exhaust section and the extrusion section are all provided with screw edges; and the length-diameter ratio L: D of the screw body is equal to 29. The screw is characterized in that the circumferential surface of the mixing section is provided with two screws which are mutually engaged with a plurality of screw edges which are obliquely arranged; and when stretched, the screw edges form an included angle of 19.5-20.5 degrees with the axis of the screw body. Compared with the prior art, the screw has the advantages that the circumferential surface of the mixing section of the screw is provided with two screws which are mutually engaged with a plurality of screw edges which are obliquely arranged, so that a material can be conveniently, efficiently and uniformly mixed to mix the material with a foaming agent better; and thus, a produced product is difficult to yellow and has uniform thickness, the cost of a production formula is reduced, and the production efficiency is increased.
Description
Technical field
The utility model relates to a kind of extruder manufacture technology field, especially refers to a kind of screw rod that is used in the twin-screw foam extrusion machine.
Background technology
Screw rod is one of kernel component of extrusion equipment, and it is exactly with the PVC powder that the foaming screw rod mainly acts on, through carrying, compressing; Compacting plasticizing, exhaust; Steps such as homogenizing metering convert the PVC stable uniform to, the finely dispersed plastic cement melt of blowing agent; Export to die head foaming and subsidiary engine equipment, produce satisfactory foamed products.At present, the flat two extrusion screw rods of simple foaming are eliminated gradually.Good in order to improve plasticizing and stable homogenizing ability and foaming effect; The screw rod of the field of extruding one type of primary structure newly developed: extruding zone discharge end pin limit is carried mixing soon with design bull steep-lead thread or is slotted mixing; Make plastifying material strengthen conveying capacity and mixing once more like this, further the homogenizing blowing agent; Improve plasticizing and improve mixing function though the screw rod of above structure has, however the foaming that blowing agent still can not be cmpletely, and can't eliminate the too high inequality of temperature better and the discharging shakiness causes influences such as fluctuation.So,, need increase the steady temperature voltage stabilizing of mixed cell again and evenly disperse blowing agent if when requiring bubble quality occurred frequently and high yield.
In the prior art; A kind of application number is called " expanded polystyrene (EPS) picture frame product production line extruder is with the foaming screw rod " for the CN201020639743.0 name Chinese utility model patent is disclosed; This foaming screw rod includes foaming screw rod body; Be characterized in: be distributed with four sections of independently working on the foaming screw rod body, these four sections of independently working are followed successively by feeding section, melt zone, extruding zone, mixing section specifically.And the utility model is distributed with the guiding screw thread on feeding section, melt zone, extruding zone, mixing section.Thus, through the existence of feeding section, melt zone, extruding zone, four sections that work alone of mixing section, can guarantee that not only the output of PS foaming is high, it is stable to extrude, the high pore of the inner expansion ratio of the goods of extruding simultaneously is fine and closely woven, can realize that low temperature extrudes.But, because can't guaranteeing material, under the condition of voltage stabilizing, steady temperature, mixes this screw rod with blowing agent, make that the material foaming is insufficient; Maldistribution, and have stain, thus the sheet material became uneven produced caused; The poor quality is so this utility model awaits further to improve.
Summary of the invention
The utility model technical problem to be solved be provide to above-mentioned prior art present situation a kind of mixing of materials fully, uniform in foaming, production efficiency high be used for the screw rod in the twin-screw foam extrusion machine.
It is a kind of screw rod that is used in the twin-screw foam extrusion machine that the utility model solves the problems of the technologies described above the technical scheme that is adopted; Include the screw rod body; This screw rod body is made up of feeding section, compression section, fluxing zone, exhaust section, mixing section, extruding zone successively; Be provided with the spiral shell rib on said feeding section, compression section, fluxing zone, exhaust section, the extruding zone; The draw ratio of said screw rod body is L: D=29, it is characterized in that: the periphery of said mixing section is provided with the be meshing with each other spiral shell rib of many oblique settings of two screw rods, when said spiral shell rib launches and the formed angle of axial line of screw rod body be 19.5 °～20.5 °.
As improvement, the formed angle of vertical line of the tip surface sideline of above-mentioned spiral shell rib and the central axis of screw rod body is 44 °～46 °.
Improve, the axially spaced-apart length of above-mentioned spiral shell rib is 4.8～5.2mm again.
Improve, the periphery of above-mentioned extruding zone is provided with spiral pin oblique with axially all spaced apart again, and said spiral pin is the oblique line shape that is parallel to each other when launching.
Improve the oblique 9～11mm that is spaced apart of above-mentioned spiral pin again.
Improve, above-mentioned spiral pin is for cylindrical again, and its diameter is 9～11mm.
Improve, the spiral shell rib on above-mentioned feeding section and the extruding zone is 7.8 °～8.2 ° with the angle between the vertical vertical line in top in the sideline of axial section and this sideline again.
Improve, the spiral shell rib on the above-mentioned compression section is 6.2 °～6.6 ° with the angle between the vertical vertical line in top in the sideline of axial section and this sideline again.
Improve, the spiral shell rib on the above-mentioned exhaust section is 3.8 °～4.2 ° with the angle between the vertical vertical line in top in the sideline of axial section and this sideline again.
Compared with prior art, the advantage of the utility model is that the periphery of this screw mixing section is provided with the be meshing with each other spiral shell rib of many oblique settings of two screw rods, and it is efficient and mix equably to be convenient to material; Thereby can mix with blowing agent better when making material get into extruding zone, improve the quality of batch mixing, balance the pressure and temperature in the melt; Thereby make the product of producing not have black line and stain, be difficult for jaundice, and the periphery of screw rod extruding zone is provided with spiral pin oblique with axially all spaced apart; Realize the voltage stabilizing of processing plastic material, steady temperature; Make blowing agent disperse stable and uniform more, material and blowing agent are fully mixing in steady temperature, voltage stabilizing, make that the plasticizing product thin and thick of producing is even; Thereby reduced the cost of factory formula, improved production efficiency.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 be among Fig. 1 H-H to section projection enlarged drawing;
Projection enlarged drawing when Fig. 3 is the expansion of Fig. 2 spiral shell rib;
Fig. 4 is the section projection enlarged drawing of K-K when the spiral pin launches among Fig. 1;
Fig. 5 is the projection enlarged drawing of Y portion among Fig. 1.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Extremely shown in Figure 5 like Fig. 1; Present embodiment be used for the screw rod in the twin-screw foam extrusion machine; Include screw rod body 1; This screw rod body 1 is made up of feeding section A, compression section B, fluxing zone C, exhaust section E, mixing section F, extruding zone G successively, is provided with the spiral shell rib on said feeding section A, compression section B, fluxing zone C, exhaust section E, the extruding zone G, and the draw ratio of said screw rod body 1 is L: D=29; The periphery of said mixing section F is provided with the be meshing with each other spiral shell rib 2 of many oblique settings of two screw rods, when said spiral shell rib 2 launches and the axial line 11 formed angle a of screw rod body 1 be 20 °.
In the present embodiment, as shown in Figure 3, the tip surface sideline 21 of spiral shell rib 2 is 45 ° with the central axis 12 formed angle β of screw rod body 1, and the axially spaced-apart length S1 of spiral shell rib 2 is 5mm.And the periphery of screw rod extruding zone G is provided with spiral pin 3 oblique with axially all spaced apart, and is as shown in Figure 4, and spiral pin 3 is the oblique line shape that is parallel to each other when launching.Said spiral pin 3 is cylindrical, and its oblique interval S2 is 10mm, and diameter d is 10mm.As shown in Figure 5; Spiral shell rib on said feeding section A and the extruding zone G is 8 ° with the angle γ between the vertical vertical line 14 in top in the sideline 13 of axial section and this sideline 13; Spiral shell rib on the said compression section B is 6.4 ° with the angle between the vertical vertical line in top in the sideline of axial section and this sideline, and the spiral shell rib on the said exhaust section E is 4 ° with the angle between the vertical vertical line in top in the sideline of axial section and this sideline.
Below the utility model is further specified:
This screw rod is a kind of novel oblique engaging tooth and spiral pin kneading screw structure; Function of use according to screw rod; It (is above-mentioned feeding section that whole screw rod is divided into the blanking section; As follows), compression section, fluxing zone, exhaust section, helical teeth engagement batch mixing section (being above-mentioned mixing section, as follows), extruding zone six parts.Wherein, The blanking section adopts two helicitic texture, and six head thread structures are adopted in the compression section, and fluxing zone adopts the four-head screw thread to open the straight trough structure for first section; Second section is adopted two helicitic texture; Exhaust section adopts the three-start screw structure, and the helical teeth batch mixing adopts octadentate batch mixing structure, extrudes the branch three-stage structure: 1, two head thread extruding zones; 2, bull steep-lead thread extruding zone; 3, six spiral pins of track mixing section.
It (is above-mentioned spiral shell rib that this screw rod focuses on oblique engaging tooth batch mixing; As follows) and spiral pin mixing; Tiltedly the engaging tooth batch mixing makes the material of coming from exhaust section through overstocked passage and then fully be mixed into extruding zone; Pin molten material that mixing handle comes from the mixing conveying of six head threads of spiral makes material pressure through close the mixing of spiral pin again, the material temperature, and blowing agent disperses more stable and uniform.
Compare existing technology, have the following advantages through the extrusion screw rod that utilizes said structure: the one, improve batch mixing and mixing plasticizing quality, the pressure in the balance melt; Temperature makes goods can plastify better, and it is thin uneven to reduce thickness of slab; Black line, stain, problems such as jaundice; The 2nd, through abundant mixed foaming agent and good temperature-control pressure-control, make the reasonable and distributed uniform of blowing agent foaming, thereby reduce formulation cost and make high-quality high-quality foaming plate.
The key position of this screw rod is oblique engaging tooth batch mixing part.
At first, this oblique engaging tooth batch mixing structure is at first used shunting principle: the melt that partly plastifies that exhaust section is exported is shunted mixing then through the slick and sly excessively rib of eight oblique types, under the internal pressure effect, get into the further plasticizing again of two head thread extruding zones.With traditional structure difference, traditional is directly to get into extruding zone through exhaust not have this batch mixing unit, and this design has solved the material blowing agent that comes out from exhaust and disperseed not good problem.
Secondly, the spiral of this screw rod pin is used the rotation stirring theory: be to accomplish that through banburying temperature, pressure is balanced from the material that six big helical pitches are come out, blowing agent mixes fully once more; Thereby make that the temperature, pressure that gets into merging core dispersion stable and blowing agent is more even; Pressure stability makes the material fluctuation little, and the goods thickness is even, and temperature stabilization makes material less than the high point of temperature; It is good to expect to have plastified product property; Blowing agent is scattered to be made through what merging core got into mould and melts material through the release of pressure foaming, and the bubble that sends is even, and the foaming quality proportion that foams is well more optimized.
In a word, this screw rod had both reduced the machine of tearing open and had expected clearly that frequency had improved production efficiency, and the product quality of manufacturing is better, reduced the financial cost of prescription again greatly.
Claims (9)
1. one kind is used for the interior screw rod of twin-screw foam extrusion machine; Include screw rod body (1); This screw rod body (1) is made up of feeding section (A), compression section (B), fluxing zone (C), exhaust section (E), mixing section (F), extruding zone (G) successively; Be provided with the spiral shell rib on said feeding section (A), compression section (B), fluxing zone (C), exhaust section (E), the extruding zone (G); The draw ratio of said screw rod body (1) is L: D=29; It is characterized in that: the periphery of said mixing section (F) is provided with the be meshing with each other spiral shell rib (2) of many oblique settings of two screw rods, when said spiral shell rib (2) launches and the formed angle of axial line (11) (a) of screw rod body (1) be 19.5 °～20.5 °.
2. the screw rod that is used in the twin-screw foam extrusion machine according to claim 1 is characterized in that: the tip surface sideline (21) of said spiral shell rib (2) is 44 °～46 ° with the formed angle of vertical line (β) of the central axis (12) of screw rod body (1).
3. according to the described screw rod that is used in the twin-screw foam extrusion machine of each claim in the claim 1 to 2, it is characterized in that: the axially spaced-apart length (S1) of said spiral shell rib (2) is 4.8～5.2mm.
4. the screw rod that is used in the twin-screw foam extrusion machine according to claim 1; It is characterized in that: the periphery of said extruding zone (G) is provided with spiral pin (3) oblique with axially all spaced apart, and said spiral pin (3) is the oblique line shape that is parallel to each other when launching.
5. the screw rod that is used in the twin-screw foam extrusion machine according to claim 4 is characterized in that: the oblique interval (S2) of said spiral pin (3) is 9～11mm.
6. the screw rod that is used in the twin-screw foam extrusion machine according to claim 4 is characterized in that: said spiral pin (3) is for cylindrical, and its diameter (d) is 9～11mm.
7. the screw rod that is used in the twin-screw foam extrusion machine according to claim 1 is characterized in that: the spiral shell rib on said feeding section (A) and the extruding zone (G) is 7.8 °～8.2 ° with the angle (γ) between the vertical vertical line in top (14) of the sideline (13) of axial section and this sideline (13).
8. the screw rod that is used in the twin-screw foam extrusion machine according to claim 1 is characterized in that: the spiral shell rib on said compression section (B) is 6.2 °～6.6 ° with the angle between the vertical vertical line in top in the sideline of axial section and this sideline.
9. the screw rod that is used in the twin-screw foam extrusion machine according to claim 1 is characterized in that: the spiral shell rib on the said exhaust section (E) is 3.8 °～4.2 ° with the angle between the vertical vertical line in top in the sideline of axial section and this sideline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205473056U CN202357423U (en) | 2011-12-08 | 2011-12-08 | Screw used in double-screw foam extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205473056U CN202357423U (en) | 2011-12-08 | 2011-12-08 | Screw used in double-screw foam extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202357423U true CN202357423U (en) | 2012-08-01 |
Family
ID=46568636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205473056U Expired - Lifetime CN202357423U (en) | 2011-12-08 | 2011-12-08 | Screw used in double-screw foam extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202357423U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103895211A (en) * | 2014-04-21 | 2014-07-02 | 铜陵瑞德塑料机械制造有限公司 | Efficient conical screw for extruder |
| CN110770001A (en) * | 2017-06-22 | 2020-02-07 | 克劳斯马菲技术有限公司 | Extruder screw, extrusion device with an extruder screw, and method for plasticizing plastic |
-
2011
- 2011-12-08 CN CN2011205473056U patent/CN202357423U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103895211A (en) * | 2014-04-21 | 2014-07-02 | 铜陵瑞德塑料机械制造有限公司 | Efficient conical screw for extruder |
| CN110770001A (en) * | 2017-06-22 | 2020-02-07 | 克劳斯马菲技术有限公司 | Extruder screw, extrusion device with an extruder screw, and method for plasticizing plastic |
| CN110770001B (en) * | 2017-06-22 | 2021-12-21 | 克劳斯马菲挤塑有限公司 | Extruder screw, extrusion device with an extruder screw, and method for plasticizing plastic |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 316032 No. 1 Ligang Road, Xikou Industrial Agglomeration Zone, Jintang Town, Dinghai District, Zhoushan City, Zhejiang Province Patentee after: Zhejiang Huaye Plastic Machinery Co.,Ltd. Address before: 316032 Zhejiang Huaye Plastic Machinery Co., Ltd., 191 Xingang Road, Jintang Town, Dinghai District, Zhoushan City, Zhejiang Province Patentee before: ZHEJIANG HUAYE PLASTICS MACHINERY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |
|
| CX01 | Expiry of patent term |