CN204914517U - Hot melt adhesive screw extruder - Google Patents
Hot melt adhesive screw extruder Download PDFInfo
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- CN204914517U CN204914517U CN201520595874.6U CN201520595874U CN204914517U CN 204914517 U CN204914517 U CN 204914517U CN 201520595874 U CN201520595874 U CN 201520595874U CN 204914517 U CN204914517 U CN 204914517U
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Abstract
The utility model provides a hot melt adhesive screw extruder, its includes extruder organism and screw rod, the screw rod structure includes after to from preceding in proper order: feed zone, compression section, even section, the section of extruding. Be provided with the helical blade of incorgruous double helix on the feed zone of this screw rod, be provided with toper cockscomb structure helical blade in the compression section. The material rolls about the effect of incorgruous double helix screw thread in the feed zone, the stirring, after the evenly high speed shearing effect of section cockscomb structure screw thread, heating, stirring can effectually avoid the material because of the stirring and the inhomogeneous stress concentration who arouses that is heated. The utility model discloses compare in prior art, can promote quality, the reduction in production cost of goods effectively.
Description
Technical field
The utility model relates to a kind of for PUR screw extruder, and relate more specifically to a kind of screw rod with the PUR screw extruder improving helicitic texture, it can by full-bodied hot melt adhesive material high degree of dispersion and mixing.
Background technology
Existing hot melt rubber stick manufacture normally adopts screw extruder that PUR solid polymer heating and melting is become melt, by the squeezing action of screw rod, promotes viscous state material, makes it become the moulded products of club shaped structure by die extrusion.Because PUR raw material generally adopts reactor mixing, the component molecular amount of the semi-finished product material obtained is different and distributional difference is larger, and single screw extrusion machine is insufficient for the stirring of raw material, and the heating of the heater outside machine barrel to raw material is uneven, heating effect is poor, thus affects the quality of moulded products.
Utility model content
Technical problem to be solved in the utility model is, overcome the defect of above-mentioned existing procucts, and a kind of PUR screw extruder improving helicitic texture is provided, the process that the screw extruder with this structure can repeatedly stir material and fully plastify, make material be heated evenly in the process simultaneously, improve quality and the production efficiency of hot melt rubber stick.The technical scheme adopted is as follows:
A kind of PUR screw extruder, described extruder comprises feeding device, barrel, screw rod, head, mouth mould.The structure of described screw rod comprises feed zone, compression section, evenly section, extruding zone successively from A-P.
Spiral groove depth described in the utility model is defined as the difference of screw thread outer radius and its root radius, and pitch is defined as the axial distance on screw rod between adjacent thread.Described screw rod has center line, and each described helical blade has the spiral angle relative to described center line.
The feed zone of described screw rod is provided with two sections of helical blades, and with feed zone mid point for boundary is divided into first half section and second half section, what be wherein connected with feeding device is first half section.
The second half section of described screw feed section is connected with compression section, it has incorgruous double-helical screw thread, incorgruous double-helical screw thread comprises the first screw thread and the second screw thread, wherein the helical blade direction of the first screw thread is identical with the helical blade direction of first half section on feed zone, and the helical blade direction of the second screw thread is contrary with the helical blade direction of first half section on feed zone.
Screw thread on screw rod can be left hand helix or right-handed helix, and the hand of spiral in the utility model is identical refers to that two screw threads are all Left-hand threads or right-hand thread, and direction refers to that a screw thread is Left-hand threads on the contrary, and another screw thread is right-hand thread.
The compression section of described screw rod is provided with indented spirals blade.
The even section of described screw rod arranges helical blade.
The shaft length of described screw rod main shaft and its diameter ratio are 16 ~ 50, preferably 40.
Described screw flight helical pitch L is 1 ~ 1.6 with the ratio of screw diameter, and preferably, lead L is 1.4 with the ratio of screw diameter.
The feed zone compression ratio of described screw rod is 2 ~ 5, preferably 2.5 ~ 4.5, more preferably 3.
In described screw feed section, the pitch of the helical blade of first half section is 20 ~ 30mm, and spiral groove depth is 5 ~ 10mm; In described screw feed section, the helical blade of first half section is 20 ° ~ 40 ° relative to the helical angle scope of described center line, and preferably, on feed zone, the helical blade of first half section is 25 ° relative to the helical angle of described center line.
Second half section in described screw feed section, the pitch of the helical blade of the first screw thread is 35 ~ 50mm, and spiral groove depth is 15 ~ 25mm, and preferably, the pitch of helical blade is 40mm, and spiral groove depth is 20mm; The pitch of the helical blade of the second screw thread is 20 ~ 30mm, and spiral groove depth is 5 ~ 10mm.In described screw feed section, the external spiral blade of second half section is 30 ° ~ 50 ° relative to the helical angle scope of described center line, and preferably, external spiral blade is 45 ° relative to the helical angle of described center line.In described screw feed section, the helical angle of the internal helical blades of second half section is identical with the helical angle of first half section helical blade on feed zone, internal helical blades is 20 ° ~ 40 ° relative to the helical angle scope of described center line, preferably, internal helical blades is 25 ° relative to the helical angle of described center line.
The compression section helical blade spacing of described screw rod is identical with spiral groove depth with the helical blade spacing of the first screw thread on feed zone with spiral groove depth, wherein the pitch of helical blade is 35 ~ 50mm, and spiral groove depth is 15 ~ 25mm, preferably, the pitch of helical blade is 40mm, and spiral groove depth is 20mm.The helical angle of the compression section helical blade of described screw rod is identical with the external spiral blade of second half section on feed zone, and helical blade is 30 ° ~ 50 ° relative to the helical angle scope of described center line.Preferably, on compression section, helical blade is 45 ° relative to the helical angle of described center line.
On the compression section of described screw rod, sawtooth is taper, the diameter of sawtooth and the ratio 1:6 ~ 1:3 of its height; Preferably, sawtooth diameter is 1:4 ~ 1:3 with the ratio of its height.The thread segment number of sawtooth is even number, and preferably, the thread segment number of sawtooth is 8 ~ 12.
The helical blade of first half section on the pitch of the even section helical blade of described screw rod and spiral groove depth and feed zone.The pitch of helical blade and spiral groove depth are respectively 20 ~ 30mm and 5 ~ 10mm, and preferably, pitch and the spiral groove depth of helical blade are respectively 25mm and 10mm.The helical angle of the even section helical blade of described screw rod is identical with the helical blade of first half section on feed zone, helical blade is 20 ° ~ 40 ° relative to the helical angle scope of described center line, preferably, on compression section, the external spiral blade of second half section is 25 ° relative to the helical angle of described center line.
The beneficial effects of the utility model are:
Its screw rod is formed by connecting by feed zone screw rod, compression section screw rod and homogenizing zone screw axial, feed zone screw rod is identical with compression section screw rod, the evenly direction of rotation of the helical blade of section screw rod, and the external spiral blade of feed zone second half section screw rod and the helical blade of compression section screw rod link into an integrated entity, thus realize feed zone screw rod and be connected with the axis of compression section screw rod, in addition, the internal helical blades of feed zone second half section is contrary with the direction of rotation of external spiral blade, the spiral shell gash depth of external spiral blade is greater than internal helical blades, and both pitch keep identical.On feed zone, first half section screw rod is set to screw propulsion baiting structure, and material stirs limit by screw rod radial clearance, carry to second half section screw rod direction below for the first time in rotarily driving of screw rod, when being delivered to the feed zone second half section, material is under the effect of incorgruous Double-spiral blade, the material that molecular weight is little is subject to strong stirring, shear action, positive displacement mechanism is relied on to carry to direction, compression section, and the large material of molecular weight is full of screw rod radial clearance, because molecular weight cannot be carried to direction, compression section more greatly, then the interior shearing to flight and external spiral sheet is subject to, stirring action, bi-directional force makes the large material of molecular weight on screw rod be subject to secondary or repeatedly shear, thus substantially increase material mixing uniformity, the frictional force simultaneously produced between screw rod and material, be conducive to heat exchange, material is made to reach the temperature of melting fast, when mass transport enters in the screw rod of compression section, along with screw rod rotates, taper zigzag screw thread upsets the flow direction of material melt, and is repeatedly split by material, changes direction and the VELOCITY DISTRIBUTION of material melt in screw channel, screw thread sawtooth produces certain resistance and shearing force to material melt, promote melting, by sawtooth to the repeated segmentation of melt, shunting, effectively reduce temperature fluctuation and the temperature difference, thus improve plasticizing quality, improve mixing uniformity and the decentralization of material, when mass transport enters in even section screw rod, further to be plastified, homogenizing, final constant temperature, level pressure, quantitative being extruded from head by extruding zone.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of PUR screw extruder screw rod, first half section helical blade on 1-feed zone, second half section external spiral blade on 2-feed zone, second half section internal helical blades on 3-feed zone, 4-screw rod, 5-zigzag helical blade, the even section helical blade of 6-, 7-helical blade.
Fig. 2 is the schematic diagram of helical blade relative to the helical angle of pitch line,
Fig. 3 is the sectional view of screw compression section,
Fig. 4 is the detail view of screw compression section material loading direction of flow.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model will be further described.
Specific embodiments 1
As shown in Figure 1, be the screw-rod structure of the PUR screw extruder that the utility model provides, comprise feed zone, compression section, evenly section, extruding zone.On feed zone, second half section screw body is set to incorgruous double-stranded screw thread, compression section is set to the taper zigzag screw thread of arranging rule.The shaft length of screw rod main shaft and its diameter ratio are 40.Screw flight helical pitch L is 1.4 with the ratio of screw diameter.The feed zone compression ratio of screw rod is 3, and on feed zone, the helical blade spacing of first half section is 25mm, and spiral groove depth is 10mm; On feed zone, the helical blade spacing of second half section is 40mm, and spiral groove depth is 20mm.On the compression section of screw rod, sawtooth is taper, and the diameter of sawtooth and the ratio 1:4 of its height, thread segment number is 8, and helical blade spacing and spiral groove depth are respectively 40mm and 20mm.The even section helical blade spacing of screw rod and spiral groove depth are respectively 25 and 10mm.On feed zone, the helical blade of first half section is 25 ° relative to the helical angle of described center line, on feed zone, the external spiral blade of second half section is 45 ° relative to the helical angle of described center line, on feed zone, internal helical blades is 25 ° relative to the helical angle of described center line, on compression section, helical blade is 45 ° relative to the helical angle of described center line, and in even section, helical blade is 25 ° relative to the helical angle of described center line.
Specific embodiments 2
As shown in Figure 1, be the screw-rod structure of the PUR screw extruder that the utility model provides, comprise feed zone, compression section, evenly section, extruding zone.Feed zone second half section screw body is set to incorgruous double-stranded screw thread, and compression section is set to the zigzag screw thread of arranging rule.The shaft length of screw rod main shaft and its diameter ratio are 16.Screw flight helical pitch L is 1 with the ratio of screw diameter.The feed zone compression ratio of screw rod is 2, and on feed zone, the helical blade spacing of first half section is 20mm, and spiral groove depth is 5mm; On feed zone, the helical blade spacing of second half section is 35mm, and spiral groove depth is 15mm.On the compression section of screw rod, sawtooth is taper, and the diameter of sawtooth and the ratio 1:3 of its height, thread segment number is 6, and helical blade spacing and spiral groove depth are respectively 35mm and 15mm.The even section helical blade spacing of screw rod and spiral groove depth are respectively 20 and 5mm.On feed zone, the helical blade of first half section is 25 ° relative to the helical angle of described center line, on feed zone, the external spiral blade of second half section is 45 ° relative to the helical angle of described center line, on feed zone, internal helical blades is 25 ° relative to the helical angle of described center line, on compression section, helical blade is 45 ° relative to the helical angle of described center line, and in even section, helical blade is 25 ° relative to the helical angle of described center line.
Specific embodiments 3
As shown in Figure 1, be the screw-rod structure of the PUR screw extruder that the utility model provides, comprise feed zone, compression section, evenly section, extruding zone.Feed zone second half section screw body is set to incorgruous double-stranded screw thread, and compression section is set to the zigzag screw thread of arranging rule.The shaft length of screw rod main shaft and its diameter ratio are 50.Screw flight helical pitch L is 1.6 with the ratio of screw diameter.The feed zone compression ratio of screw rod is 5, and on feed zone, the helical blade spacing of first half section is 30mm, and spiral groove depth is 7mm; On feed zone, the helical blade spacing of second half section is 50mm, and spiral groove depth is 17mm.On the compression section of screw rod, sawtooth is taper, and the diameter of sawtooth and the ratio 1:6 of its height, thread segment number is 12, and helical blade spacing and spiral groove depth are respectively 50mm and 17mm.The even section helical blade spacing of screw rod and spiral groove depth are respectively 30 and 7mm.On feed zone, the helical blade of first half section is 25 ° relative to the helical angle of described center line, on feed zone, the external spiral blade of second half section is 45 ° relative to the helical angle of described center line, on feed zone, internal helical blades is 25 ° relative to the helical angle of described center line, on compression section, helical blade is 45 ° relative to the helical angle of described center line, and in even section, helical blade is 25 ° relative to the helical angle of described center line.
Claims (7)
1. a PUR screw extruder, described extruder comprises feeding device, barrel, screw rod, head, mouth mould, it is characterized in that, the structure of described screw rod comprises feed zone, compression section, evenly section, extruding zone from front to back successively;
The feed zone of described screw rod is provided with two sections of helical blades, described feed zone comprises first half section and second half section, described first half section is connected with feeding device, the described second half section is connected with compression section, the described second half section has incorgruous double-helical screw thread, incorgruous double-helical screw thread comprises the first screw thread and the second screw thread, the helical blade direction of described first screw thread is identical with the helical blade direction of first half section on feed zone, and the helical blade direction of the second screw thread is contrary with the helical blade direction of first half section on feed zone;
The compression section of described screw rod is provided with indented spirals blade;
The even section of described screw rod arranges helical blade.
2. PUR screw extruder according to claim 1, is characterized in that, the shaft length of described screw rod main shaft and its diameter ratio are 16 ~ 50.
3. PUR screw extruder according to claim 1, is characterized in that, the feed zone compression ratio of described screw rod is 2 ~ 5.
4. PUR screw extruder according to claim 1, is characterized in that, described screw rod has center line, and each described helical blade has the spiral angle relative to described center line.
5. PUR screw extruder according to claim 4, is characterized in that, in described screw feed section, the helical blade of first half section is 20 ° ~ 40 ° relative to the helical angle scope of described center line; In described screw feed section, the external spiral blade of second half section is 30 ° ~ 50 ° relative to the helical angle scope of described center line, and on feed zone, the helical angle of the internal helical blades of second half section is identical with the helical blade of first half section on feed zone; In described screw compression section, the helical angle of zigzag helical blade is identical with the external spiral blade of second half section on feed zone; In the even section of described screw rod, the helical angle of helical blade is identical with the helical blade of first half section on feed zone.
6. PUR screw extruder according to claim 1, it is characterized in that, in screw feed section, the helical blade of first half section is identical with spiral groove depth with the pitch of the helical blade on the internal helical blades of second half section on feed zone, evenly section, and on the feed zone of described screw rod, the external spiral blade of second half section is identical with spiral groove depth with the pitch of the helical blade on compression section.
7. PUR screw extruder according to claim 1, on the compression section of described screw rod, sawtooth is taper, the diameter of sawtooth and the ratio 1:6 ~ 1:3 of its height; The thread segment number of sawtooth is even number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520595874.6U CN204914517U (en) | 2015-08-10 | 2015-08-10 | Hot melt adhesive screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520595874.6U CN204914517U (en) | 2015-08-10 | 2015-08-10 | Hot melt adhesive screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204914517U true CN204914517U (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520595874.6U Expired - Fee Related CN204914517U (en) | 2015-08-10 | 2015-08-10 | Hot melt adhesive screw extruder |
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| Country | Link |
|---|---|
| CN (1) | CN204914517U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467512A (en) * | 2018-03-29 | 2018-08-31 | 江苏中宏环保科技有限公司 | The reclaimed rubber Preparation equipment and its complete integrated approach divided based on function |
| CN111152436A (en) * | 2020-01-20 | 2020-05-15 | 贾中奇 | Environment-friendly stone paper extrusion molding screw, extruder and stone paper production process |
| CN112248400A (en) * | 2020-09-29 | 2021-01-22 | 江功志 | Extruder for rubber processing |
-
2015
- 2015-08-10 CN CN201520595874.6U patent/CN204914517U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467512A (en) * | 2018-03-29 | 2018-08-31 | 江苏中宏环保科技有限公司 | The reclaimed rubber Preparation equipment and its complete integrated approach divided based on function |
| CN111152436A (en) * | 2020-01-20 | 2020-05-15 | 贾中奇 | Environment-friendly stone paper extrusion molding screw, extruder and stone paper production process |
| CN112248400A (en) * | 2020-09-29 | 2021-01-22 | 江功志 | Extruder for rubber processing |
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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: 20151230 Termination date: 20190810 |
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| CF01 | Termination of patent right due to non-payment of annual fee |