CN104527027A - Extrusion screw in PP foam sheet extruder mixing device - Google Patents
Extrusion screw in PP foam sheet extruder mixing device Download PDFInfo
- Publication number
- CN104527027A CN104527027A CN201410735662.3A CN201410735662A CN104527027A CN 104527027 A CN104527027 A CN 104527027A CN 201410735662 A CN201410735662 A CN 201410735662A CN 104527027 A CN104527027 A CN 104527027A
- Authority
- CN
- China
- Prior art keywords
- screw
- thread
- mixing device
- extruder mixing
- threads
- 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.)
- Pending
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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
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
-
- 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
- B29C48/655—Screws with two or more threads having three or more threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an extrusion screw in a PP foam sheet extruder mixing device. The extrusion screw includes a screw body, one end of the screw body is a screw head, the other end of the screw body is a screw tail, the screw surface is provided with an extrusion screw thread for feeding, the extrusion screw thread is formed by longitudinal spiral arrangement of at least two multi-start screw threads in order, a guide channel is formed between adjacent two-start screw threads, and the longitudinally adjacent guide channels in adjacent two segments of multi-start screw threads are mutually staggered. The extrusion screw provided by the invention greatly improves the uniformity of material mixing, thus greatly improving the quality and performance of finished products.
Description
Technical field
The present invention relates to PP foamed board production technical field, be specifically related to adopt liquid carbon dioxide as the stock screw in the PP foamed board extruder mixing device of blowing agent.
Background technology
PP foamed board and polypropylene expanded plate, PP foamed board is widely used in multiple fields such as auto parts and components, device fabrication, stationery, packaging, construction materials with its excellent mechanical property, significant effect of heat insulation, good resilience and the feature such as corrosion resistance and recyclable regeneration.Blowing agent is one of the important source material during PP foamed board is produced, and traditional blowing agent is freon.Because freon can produce extremely serious destruction to ozone layer, therefore PP foamed board adopts liquid carbon dioxide replacement fluorine Leon as blowing agent in producing more and more at present.
One step of producing PP foaming plate the most key using liquid carbon dioxide as blowing agent is exactly that liquid towards carbon dioxide mixes with PP melting charge, and the uniformity coefficient that liquid carbon dioxide mixes with PP melting charge can affect performance and the quality of PP foaming plate.What my company newly have developed that liquid towards carbon dioxide and PP melting charge carry out mixing at present extrudes mixing device, and the structure extruding mixing device mainly comprises: horizontally disposed machine barrel, and the feed end of machine barrel is connected with feed pipe, and the discharge end of machine barrel is connected with discharge nozzle.Complete the work of extruding batch mixing to coordinate machine barrel, need to research and develop a kind of with machine barrel with the use of stock screw.
Summary of the invention
The technical issues that need to address of the present invention are: provide the stock screw in a kind of PP foamed board extruder mixing device that liquid carbon dioxide and PP melting charge can be made fully to mix.
For solving the problem, the technical solution used in the present invention is: the stock screw in PP foamed board extruder mixing device, comprise: screw body, one end of screw body is screw head, the other end of screw body is screw rod tail, it is characterized in that: screw body surface is provided with the material extrusion screw thread for feeding, material extrusion screw thread is made up of the longitudinal helical arrangement successively of at least two sections of multiple threads, form a deflector chute between two head threads adjacent in every section of multiple thread, the deflector chute that the longitudinal direction in adjacent two sections of multiple threads is adjacent staggers setting mutually.
Further, the stock screw in aforesaid PP foamed board extruder mixing device, wherein, screw rod tail is provided with the sealing thread preventing material from outwards flowing out, and the hand of spiral of sealing thread is consistent with the hand of spiral of material extrusion screw thread.
Further, the stock screw in aforesaid PP foamed board extruder mixing device, wherein, every section of multiple-threaded length is 2 ~ 4 times of screw body diameter.
Further, the stock screw in aforesaid PP foamed board extruder mixing device, wherein, described multiple thread is four head threads.
Further, the stock screw in aforesaid PP foamed board extruder mixing device, wherein, screw head is tapered.
Advantage of the present invention is: screw body is provided with at least two sections of multiple threads, a deflector chute is formed between two head threads adjacent in every section of multiple thread, in adjacent two sections of multiple threads, longitudinally adjacent deflector chute staggers setting mutually, the material that a deflector chute in such the last period multiple thread is derived can be extruded and branch to, in two deflector chutes in rear one section of multiple thread that bar deflector chute is longitudinally adjacent therewith, the process that material moves from machine barrel feed end to machine barrel discharge end is exactly that material is by the process of constantly extruding shunting mixing, material is mixed fully in the process being constantly extruded shunting, which greatly enhances the uniformity of the rear material of mixing, thus substantially increase performance and the quality of PP foaming plate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the stock screw in PP foamed board extruder mixing device of the present invention.
Fig. 2 is the deployed configuration schematic diagram of two sections of material extrusion screw threads in Fig. 1.
Fig. 3 is the structural representation that stock screw is arranged in machine barrel.
Detailed description of the invention
Below in conjunction with accompanying drawing and preferred embodiment, the present invention is described in further detail.
As shown in Figure 1, Figure 2, Figure 3 shows, stock screw in PP foamed board extruder mixing device, comprise: screw body 9, one end of screw body 9 is screw head 92, the other end of screw body 9 is screw rod tail 93, and screw body 9 surface is provided with the material extrusion screw thread for feeding, and described material extrusion screw thread is made up of the longitudinal helical arrangement successively of at least two sections of multiple threads 11, two sections of multiple threads are for being preferably four head threads, and the length of every section of multiple thread 11 is 2 ~ 4 times of screw body 9 diameter.The hop count of multiple thread 11 specifically can be determined according to the length of screw body 9, and the concrete length of every section of multiple thread 11 can be determined according to actual needs.A deflector chute 111 is formed between two head threads adjacent in every section of multiple thread 11, the deflector chute 111 that longitudinal direction in adjacent two sections of multiple threads is adjacent staggers setting mutually, in the present embodiment, the afterbody 93 of screw body 9 is provided with the sealing thread 91 preventing material from outwards flowing out, and the hand of spiral of sealing thread 91 is consistent with the hand of spiral of material extrusion screw thread; In addition, screw head 92 is tapered, and the screw head 92 of capitate plays the effect of effectively feeding forward, and energy is rapid and material is separated.
Operation principle is as follows: stock screw level runs through and is arranged in machine barrel in mixing device 3 and can rotates in machine barrel 3 under the driving of drive unit, liquid carbon dioxide and PP melting charge constantly enter in machine barrel 3 from machine barrel feed end 31, and the material after stock screw rotates in machine barrel 3 constantly moves to machine barrel discharge end 32 direction.Due on screw body 9 longitudinally adjacent deflector chute 111 mutually to stagger setting, the material that a deflector chute 111 in such the last period multiple thread 11 is derived can be extruded and branch to, in two deflector chutes in rear one section of multiple thread that bar deflector chute 111 is longitudinally adjacent therewith, the process that material moves from machine barrel feed end 31 to machine barrel discharge end 32 is exactly that material is by the process of constantly extruding shunting mixing, on stock screw 9, multiple-threaded hop count is more, the number of times of express material shunting mixing is more, mixing of materials is also more abundant, more even, material is mixed fully in by the process of constantly extruding shunting, this effectively improves the uniformity of the material after having mixed, thus substantially increase quality and the performance of PP foaming plate.In addition, screw rod tail 93 is provided with sealing thread 91, and the hand of spiral of sealing thread 91 is consistent with the hand of spiral of material extrusion screw thread, such sealing thread 91 can order about material constantly to the motion of machine barrel discharge end 32 direction, thus plays the phenomenon generation preventing the material in machine barrel 3 from outwards being flowed out by machine barrel discharge end 31.
Claims (5)
- Stock screw in 1.PP foamed board extruder mixing device, comprise: screw body, one end of screw body is screw head, the other end of screw body is screw rod tail, it is characterized in that: screw body surface is provided with the material extrusion screw thread for feeding, material extrusion screw thread by least two sections of multiple threads longitudinally successively helical arrangement form, form a deflector chute between two head threads adjacent in every section of multiple thread, the deflector chute that the longitudinal direction in adjacent two sections of multiple threads is adjacent staggers setting mutually.
- 2. the stock screw in PP foamed board extruder mixing device according to claim 1, it is characterized in that: screw rod tail is provided with the sealing thread preventing material from outwards flowing out, the hand of spiral of sealing thread is consistent with the hand of spiral of material extrusion screw thread.
- 3. the stock screw in PP foamed board extruder mixing device according to claim 1 and 2, is characterized in that: every section of multiple-threaded length is 2 ~ 4 times of screw body diameter.
- 4. the stock screw in PP foamed board extruder mixing device according to claim 1 and 2, is characterized in that: described multiple thread is four head threads.
- 5. the stock screw in PP foamed board extruder mixing device according to claim 1 and 2, is characterized in that: screw head is tapered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735662.3A CN104527027A (en) | 2014-12-08 | 2014-12-08 | Extrusion screw in PP foam sheet extruder mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735662.3A CN104527027A (en) | 2014-12-08 | 2014-12-08 | Extrusion screw in PP foam sheet extruder mixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104527027A true CN104527027A (en) | 2015-04-22 |
Family
ID=52842747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410735662.3A Pending CN104527027A (en) | 2014-12-08 | 2014-12-08 | Extrusion screw in PP foam sheet extruder mixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104527027A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448920A (en) * | 2016-08-31 | 2017-02-22 | 惠州市亚创域科技有限公司 | Material extrusion threaded rod for conveying high temperature PA material of three layers of insulating wires |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3850414A (en) * | 1972-12-26 | 1974-11-26 | H Scharer | Homogenizing extruders |
| JPS5244876A (en) * | 1975-10-07 | 1977-04-08 | Japan Steel Works Ltd | Synthetic resin working machine screw |
| CN102490339A (en) * | 2011-12-08 | 2012-06-13 | 浙江华业塑料机械有限公司 | Screws used in twin-screw foaming extruder |
| CN203637145U (en) * | 2013-11-08 | 2014-06-11 | 天津市天德橡塑机械有限公司 | Disperse cooling screw of single screw extruder |
| CN204398297U (en) * | 2014-12-08 | 2015-06-17 | 张家港市兰航机械有限公司 | Stock screw in PP foamed board extruder mixing device |
-
2014
- 2014-12-08 CN CN201410735662.3A patent/CN104527027A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3850414A (en) * | 1972-12-26 | 1974-11-26 | H Scharer | Homogenizing extruders |
| JPS5244876A (en) * | 1975-10-07 | 1977-04-08 | Japan Steel Works Ltd | Synthetic resin working machine screw |
| CN102490339A (en) * | 2011-12-08 | 2012-06-13 | 浙江华业塑料机械有限公司 | Screws used in twin-screw foaming extruder |
| CN203637145U (en) * | 2013-11-08 | 2014-06-11 | 天津市天德橡塑机械有限公司 | Disperse cooling screw of single screw extruder |
| CN204398297U (en) * | 2014-12-08 | 2015-06-17 | 张家港市兰航机械有限公司 | Stock screw in PP foamed board extruder mixing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448920A (en) * | 2016-08-31 | 2017-02-22 | 惠州市亚创域科技有限公司 | Material extrusion threaded rod for conveying high temperature PA material of three layers of insulating wires |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150422 |
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| RJ01 | Rejection of invention patent application after publication |