CN201511515U - Melting section structure of screw in single screw extruder - Google Patents
Melting section structure of screw in single screw extruder Download PDFInfo
- Publication number
- CN201511515U CN201511515U CN200920037287XU CN200920037287U CN201511515U CN 201511515 U CN201511515 U CN 201511515U CN 200920037287X U CN200920037287X U CN 200920037287XU CN 200920037287 U CN200920037287 U CN 200920037287U CN 201511515 U CN201511515 U CN 201511515U
- Authority
- CN
- China
- Prior art keywords
- screw
- melt
- thread
- screw rod
- channel
- 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
- B29C48/64—Screws with two or more threads
- B29C48/65—Screws with two or more threads neighbouring threads or channels having different configurations, e.g. one thread being lower than its neighbouring thread
-
- 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
- B29C48/397—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 a single screw
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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 melting section structure of a screw in a single screw extruder, which can improve the melting velocity of plastic solids and comprises a screw main body and main and auxiliary screw threads arranged on a melting section of the screw main body. The main and auxiliary screw threads have the same lead. Along the material feeding direction, the width of a melt screw channel formed between the main and auxiliary screw threads is narrower than that of a sold screw channel formed between the auxiliary and main screw threads, and the melt screw channel is deeper and deeper, while the solid screw channel is shallower and shallower. The single screw extruder adopting the screw with the melting section structure can save energy consumption by about 30 percent and improve the production efficiency by over 50 percent.
Description
Technical field
The utility model relates to the screw rod in the single screw extrusion machine, refers more particularly to the melt zone structure of screw rod in the single screw extrusion machine.
Background technology
The single screw extrusion machine screw rod can be divided into two kinds of structures of gradation type and divergence type according to the different structure of melt zone.As shown in Figure 1, the melt zone structure of divergence type screw rod comprises: screw rod body 1 and the major and minor screw thread 3 and 4 that is arranged on screw rod body 1 melt zone 2, along walking to expect direction F, the melt screw channel 5 that forms between the major and minor screw thread 3 and 4, the solid screw channel 6 that forms between pair, the main thread 4 and 3.Because the divergence type screw rod can separate the melt of polymer and molten solids not, thereby has strengthened the extruder melting rate, has improved melting efficiency; Also improved simultaneously and extruded stability.Thereby what use in most of single screw extrusion machines all is the divergence type screw rod.Present divergence type screw rod, because the helical pitch of deputy thread 4 is bigger than main thread 3, caused that plastic solidification district screw rod area reduces gradually, melt zone screw rod area increases gradually, and solid area screw rod area reduce gradually make that plastic solidification fusion speed is slack-off, melt zone screw rod area increases the plastic melt temperature that causes fusion gradually and raises, and has wasted energy.In addition, because the helical pitch of deputy thread 4 is bigger than main thread 3, deputy thread 4 can catch up with main thread 3, also cross with it.Therefore, in case after the helical pitch of major and minor screw thread 3 and 4 was determined, the length of melt zone was also just fixed, in other words, major and minor screw thread 3 and 4 helical pitch and the length of melt zone pin down mutually.So just make troubles to design, and major and minor screw thread 3 and 4 different difficulty of processing that also increased major and minor screw thread 3 and 4 of helical pitch.
The utility model content
A technical problem to be solved in the utility model is: provide a kind of design and processing all fairly simple, and can improve the melt zone structure of plastics screw rod in the single screw extrusion machine of the distribution situation of melt zone and solid area.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the melt zone structure of screw rod in the single screw extrusion machine comprises: screw rod body and be arranged on major and minor screw thread on the screw rod body melt zone, and the helical pitch of major and minor screw thread is identical; Along walking to expect direction, the width of the melt screw channel that forms between the major and minor screw thread is narrower than the solid screw channel that forms between pair, the main thread, and the melt screw channel is more and more darker, and the solid screw channel is more and more shallow.
The beneficial effects of the utility model are: the helical pitch of major and minor screw thread of the present utility model is identical, make that design and processing are all very convenient, the length of melt zone can be set arbitrarily, and change plastics in the distribution of melt zone and solid area with set the end position of melt zone by changing melt screw channel and solid screw channel, make plastic solidification obtain sufficient heat energy and friction energy to accelerate its fusion, the plastic melt of fusion absorbs energy as far as possible less from the external world, thereby about energy efficient 30%, production efficiency improves more than 50%.
Description of drawings
Fig. 1 is the melt zone structural representation of screw rod in the extruder described in the background technology;
Among the figure: 1, screw rod body, 2, melt zone, 3, main thread, 4, deputy thread, 5, the melt screw channel, 6, the solid screw channel; F is for walking to expect direction;
Fig. 2 is the melt zone structural representation of screw rod in the extruder described in the utility model;
Among the figure: 1, screw rod body, 2, melt zone, 3, main thread, 4, deputy thread, 5, the melt screw channel, 6, the solid screw channel; F is for walking to expect direction.
The specific embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present utility model in detail.
As shown in Figure 2, the melt zone structure of screw rod in the single screw extrusion machine described in the utility model, comprise: screw rod body 1 and be arranged on main thread 3 and deputy thread 4 on the melt zone 2 of screw rod body 1, major and minor screw thread 3 is identical with 4 helical pitch, along walking to expect direction F, the width of the melt screw channel 5 that forms between the major and minor screw thread 3 and 4 is narrower than the solid screw channel 6 that forms between pair, the main thread 4 and 3, and, melt screw channel 5 is more and more darker, and solid screw channel 6 is more and more shallow.
Claims (1)
1. the melt zone structure of screw rod in the single screw extrusion machine comprises: screw rod body and be arranged on major and minor screw thread on the screw rod body melt zone, and it is characterized in that: the helical pitch of described major and minor screw thread is identical; Along walking to expect direction, the width of the melt screw channel that forms between the major and minor screw thread is narrower than the solid screw channel that forms between pair, the main thread, and the melt screw channel is more and more darker, and the solid screw channel is more and more shallow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920037287XU CN201511515U (en) | 2009-02-23 | 2009-02-23 | Melting section structure of screw in single screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920037287XU CN201511515U (en) | 2009-02-23 | 2009-02-23 | Melting section structure of screw in single screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201511515U true CN201511515U (en) | 2010-06-23 |
Family
ID=42482917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920037287XU Expired - Fee Related CN201511515U (en) | 2009-02-23 | 2009-02-23 | Melting section structure of screw in single screw extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201511515U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938530A (en) * | 2017-04-05 | 2017-07-11 | 华南理工大学 | A kind of special extrusion screw rod of heat-proof polythene and its extrusion method |
-
2009
- 2009-02-23 CN CN200920037287XU patent/CN201511515U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106938530A (en) * | 2017-04-05 | 2017-07-11 | 华南理工大学 | A kind of special extrusion screw rod of heat-proof polythene and its extrusion method |
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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: 20100623 Termination date: 20140223 |