CN106313479B - A kind of miscellaneous plastic sub-prime increment equipment - Google Patents
A kind of miscellaneous plastic sub-prime increment equipment Download PDFInfo
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- CN106313479B CN106313479B CN201610897980.9A CN201610897980A CN106313479B CN 106313479 B CN106313479 B CN 106313479B CN 201610897980 A CN201610897980 A CN 201610897980A CN 106313479 B CN106313479 B CN 106313479B
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- screw rod
- plate
- mesh cleaning
- machine barrel
- mesh
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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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
-
- 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
- B29C48/69—Filters or screens for the moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention discloses a kind of miscellaneous plastic sub-prime increment equipment, main to include driving motor, retarder, shaft coupling, screw rod, machine barrel, heating system, exhaust system, filter plate, handspike, mesh cleaning plate, melt discharging pump, filter screen, extrusion die, solid phase discharge gate etc.；The transmission system of the driving motor and retarder and shaft coupling constitution equipment；The screw rod is placed in inside machine barrel, and is connected with transmission system；The filter plate is combined with machine barrel and forms a hollow cylinder；Many mesh cleaning bars are arranged on the mesh cleaning plate, can be moved vertically up and down；The handspike is connected as one with mesh cleaning plate；The solid phase discharge gate is located at the least significant end of screw rod, and the lateral outer of equipment is extended to by pipeline；The melt discharging pump is connected with extrusion die.It can realize that the sorting of miscellaneous plastic is synchronous with extruding pelletization using miscellaneous plastic sub-prime increment equipment to carry out.
Description
Technical field
The invention belongs to plastics machinery equipment field, be related to it is a kind of the value-added equipment of sub-prime is carried out to miscellaneous plastic, especially
To be related to a kind of heating using screw extruder and extrusion, thus by low-melting component in miscellaneous plastic and high melting point component into
Row separation of solid and liquid, further by melting charge extruding pelletization, realizes the sub-prime increment of miscellaneous plastic.
Background technology
Nowadays, with the fast development of plastics industry, the various plastics yield cumulative year after year in China, thus waste plastic
Amount is also continuously increased therewith.The component of waste plastics is frequently not single, but mutually mixes between several plastics and formed, from
And restrict the approach of waste plastics higher value application.Therefore the sorting of useless mixed plastic is the crucial ring that waste plastics recycling utilizes
Section.At present, the sorting mode of China's recycling waste plastic is based on artificial separation, and such a method efficiency is low, and labor intensity is big.It is few
Number large enterprise can combine the sorting for the methods of electric separation, selection by winnowing and flotation realizing waste plastic, these screening installation prices compare
It is expensive.
The higher one pack system recycled plastic of purity is obtained after sorting, the Screw Extrusion that can carry out next step is granulated to obtain
Recycled plastic granules.It is this to sort the pattern separated with extruding pelletization, the increase of energy consumption is not only resulted in, and adds sorting
Equipment funds are put into.It is therefore desirable to provide a kind of screw extruder with sorting function, so as to fulfill point of miscellaneous plastic
The choosing production link for carrying out, simplifying regenerated plastics synchronous with extruding pelletization, is effectively reduced production cost.
The content of the invention
In order to solve the problem above-mentioned, carry out that sub-prime is value-added sets to miscellaneous plastic the object of the present invention is to provide a kind of
Standby, which can realize that the sorting of miscellaneous plastic is synchronous with extruding pelletization and carry out.
The object of the present invention is achieved like this, a kind of miscellaneous plastic sub-prime increment equipment, it is characterised in that：Bag
Include driving motor, retarder, engine base, shaft coupling, screw rod, machine barrel, heating system, exhaust system, filter plate, handspike, mesh
Clear up plate, melt discharging pump, filter screen, extrusion die, solid phase discharge gate；The retarder is fixed by the bracket on engine base,
Retarder one end is connected with driving motor, and the other end is connected with shaft coupling, and three constitutes the transmission system of equipment；The machine barrel
It is fixed on by three stents on engine base, exhaust system and charge door is offered on machine barrel；The screw rod is gradually reduced for pitch
Type screw rod, is placed in inside machine barrel, and one end is connected with transmission system output terminal, and the other end is adjacent with solid phase discharge gate；The heating
System is broadly divided into two parts up and down, and the outer wall of machine barrel, the lower part installation of heating system are partially installed in heating system
On one flat plate, tablet is installed on the shell of right end；The filter plate is located at below screw rod, and composition one is combined with machine barrel
A hollow cylinder, filter plate are being equipped with one piece of positioning plate close to the end of solid phase discharge port, for positioning mesh cleaning plate
Position, avoid mesh cleaning bar from touching screw rod, cause both to damage, the mesh of circular arc type cleaning plate can also play drainage
Liquid phase material flows to the effect of melt discharging pump；Mesh cleaning plate be located at filter plate underface, the top of tablet, using can
Dynamic hinged-support is connected with filter plate, can be moved vertically up and down, and the mesh position that mesh cleaning plate correspond on filter plate, which installs, puts,
Many mesh cleaning bars are accordingly arranged on mesh cleaning plate；The handspike is installed on tablet, one end and mesh cleaning plate
It is connected as one, the other end is placed in device external, for controlling the movement of mesh cleaning plate manually；The solid phase discharge gate is located at
The least significant end of screw rod, and extend to by pipeline the lateral outer of equipment；The melt discharging pump is located at below solid phase discharge gate,
And be isolated with solid phase discharge gate, there is a heating coil below melt discharging pump, for being heated to melt discharging pump；It is described
Extrusion die be connected with melt discharging pump, realize the extruding pelletization of melt material, discharge port offered on extrusion die, and
And heating mantle is installed, prevent liquid phase material from cooling down and blocking discharge port；The filter screen is installed on melt discharging pump and extrusion
Between getting to know.
The filter plate is detachable, and is combined with machine barrel and forms a hollow cylinder；And it is located at spiral shell
Below bar, screw rod setting is close to；For filter plate leading portion without mesh, back segment is evenly distributed with many apertures.
The mesh cleaning plate is identical with filtering plate shape, belongs to circular arc template；Filter plate is corresponded on mesh cleaning plate
On mesh position install, be regularly dispersed with many mesh cleaning bars thereon；Mesh cleaning plate can control it by handspike
Move up and down.
The filter screen is the filter screen of plug-in, can install the filter screen of different meshes as needed.
Specifically, the technical solution adopted by the present invention to solve the technical problems is：A kind of miscellaneous plastic sub-prime increment
Equipment, including driving motor, retarder, engine base, shaft coupling, screw rod, machine barrel, heating system, exhaust system, filter plate, hand push
The critical piece compositions such as bar, mesh cleaning plate, melt discharging pump, filter screen, extrusion die, solid phase discharge gate；The retarder
It is fixed by the bracket on engine base, retarder one end is connected with driving motor, and the other end is connected with shaft coupling, and three, which constitutes, to be set
Standby transmission system；The machine barrel is fixed on engine base by three stents, and exhaust system and charge door are offered on machine barrel；Institute
State screw rod and be gradually reduced type screw rod for pitch, be placed in inside machine barrel, and be connected with transmission system by shaft coupling；The heating system
System is broadly divided into two parts up and down, and upper part heating system is installed on the outer wall of machine barrel, and lower part heating system is installed on one piece
On tablet, tablet is installed on the shell of right end；The filter plate is located at below screw rod, and it is hollow to be combined composition one with machine barrel
Cylinder, filter plate is being equipped with one piece of positioning plate in the end close to solid phase discharge port, the position of plate cleared up for positioning mesh；
Mesh cleaning plate is located at the underface of filter plate, and the top of tablet, is connected using movable hinged shoe with filter plate, can more than
Lower vertical movement, the mesh position that mesh cleaning plate correspond on filter plate install, and many is accordingly arranged on mesh cleaning plate
Mesh cleaning bar；The handspike is installed on tablet, and one end is connected as one with mesh cleaning plate, and the other end is placed in outside equipment
Portion, for controlling the movement of mesh cleaning plate manually；The solid phase discharge gate is located at the least significant end of screw rod, and is extended by pipeline
To the lateral outer of equipment；The melt discharging pump is located at below solid phase discharge gate, and isolates with solid phase discharge gate, melt discharging
There is a heating coil in pump lower section, for being heated to melt discharging pump；The extrusion die is connected with melt discharging pump,
Realize the extruding pelletization of melt material, heating mantle is installed on extrusion die, prevent liquid phase material from cooling down and blocking discharge port；Institute
State filter screen and be installed on melt discharging pump and between extrusion gets to know.
The pitch of the screw rod is to be gradually reduced.
The filter plate is detachable, and is combined with machine barrel and forms a hollow cylinder；And it is located at screw rod
Lower section, is close to screw rod setting；For filter plate leading portion without mesh, back segment is evenly distributed with many apertures.
The mesh cleaning plate is identical with filtering plate shape, belongs to circular arc template；Filter plate is corresponded on mesh cleaning plate
On mesh position install, be regularly dispersed with many mesh cleaning bars thereon；Mesh cleaning plate can control it by handspike
Move up and down.
The filter screen is plug-in filter screen, can install the filter screen of different meshes as needed.
Advantages of the present invention is：The present invention is using realizing that the sorting of miscellaneous plastic and extrusion are made using screw extruder
The synchronous sorting link for carrying out, eliminating early period of grain, greatly reduces energy consumption, simplifies the production process of regenerated plastics, effectively
Ground reduces production cost, has the advantages that efficient, energy-saving and environmental protection.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the A-A schematic cross-sectional views of Fig. 1.
Reference numeral：1. drive motor, 2. retarders, 3. shaft couplings, 4. machine barrels, 5. feed inlets, 6. screw rods, 6-1 screw rods
Major diameter, 6-2 screw rods path, 7. exhaust systems, 8. heating systems, 9. solid phase discharge gates, 10. filter screens, 11. extrusion dies, 11-
1 discharge port, 12. heating mantles, 13. melt discharging pumps, 14. positioning plates, 15. filter plates, 15-1. mesh, 16. handspikes, 17. nets
Hole cleaning plate, 18. mesh cleaning bars, 19. movable hinged shoes, 20. stents, 21. tablets, 22. shells, 23. engine bases.
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, a kind of miscellaneous plastic sub-prime increment equipment, including driving motor 1, retarder 2, machine
Seat 23, shaft coupling 3, screw rod 6, machine barrel 4, heating system 8, exhaust system 7, filter plate 15, handspike 16, mesh cleaning plate 17,
The critical pieces such as melt discharging pump 13, filter screen 10, extrusion die 11, solid phase discharge gate 9 form；The retarder 2 passes through branch
Frame 20 is fixed on engine base 23, and 2 one end of retarder is connected with driving motor 1, and the other end is connected with shaft coupling 3, and three constitutes
The equipment driven system；The machine barrel 4 is fixed on engine base 23 by three stents 20, offered on machine barrel 4 exhaust system 7 and
Charge door 5；The screw rod 6 is gradually reduced type screw rod for pitch, is placed in inside machine barrel 4, and one end is connected with transmission system output terminal,
The other end is adjacent with solid phase discharge gate 9；The heating system 8 is broadly divided into two parts up and down, the upper part installation of heating system 8
In the outer wall of machine barrel 4, the lower part of heating system 8 is installed on one flat plate 21, and tablet is installed on the shell 22 of right end；Institute
State filter plate 15 and be located at the lower section of screw rod 6, be combined with machine barrel 4 and form a hollow cylinder, filter plate 15 is close to solid phase
The end of discharge port 9 is equipped with one piece of positioning plate 14, for positioning the position of mesh cleaning plate 17, avoids mesh cleaning bar 18 from touching
To screw rod 6, both are caused to damage, the mesh cleaning plate 17 of circular arc type can also play drainage liquid phase material and flow to melt discharging pump
13 effect；The mesh cleaning plate 17 is located at immediately below filter plate 15, and the top of tablet 21, utilizes movable hinged shoe 19 and mistake
Filter plate 15 connects, and can move vertically up and down, correspond to the mesh 15-1 positions on filter plate 15, and mesh is cleared up corresponding on plate 17
Arrange many mesh cleaning bars 18；The handspike 16 is installed on tablet 21, and one end is connected as one with mesh cleaning plate 17
Body, the other end are placed in device external, for controlling the movement of mesh cleaning plate 17 manually；The solid phase discharge gate 9 is located at screw rod 6
Least significant end, and extend to by pipeline the lateral outer of equipment；The melt discharging pump 13 is located at the lower section of solid phase discharge gate 9,
And be isolated with solid phase discharge gate 9, there is a heating coil in the lower section of melt discharging pump 13, for adding to melt discharging pump 13
Heat；The extrusion die 11 is connected with melt discharging pump 13, realizes the extruding pelletization of melt material, is opened on extrusion die 11
Equipped with discharge port 11-1, and heating mantle 12 is installed, prevents liquid phase material from cooling down and blocking discharge port 11-1；The filter screen
10 get to know between 11 positioned at melt discharging pump 13 and extrusion.
Concrete operating principle is：The miscellaneous plastic of two kinds of different melting points compositions is added in extruder by feed inlet, is led to
Cross the temperature of heating system control machine barrel so that it is liquid phase that the relatively low plastics of fusing point, which start melting in feeding section end, and fusing point
Higher plastics keep solid phase, and material is fed forward under the rotation of screw rod.Pitch in course of conveying due to screw rod is gradual
Reduce, solid-phase material, which is constantly compacted, to be fed forward to solid phase discharge gate, is discharged from extruder side, liquid phase material is extruded logical
The mesh for crossing filter plate is flowed on arc-shaped mesh cleaning plate, it is achieved thereby that the separation of solid phase and liquid phase material.Melted
Vapor that journey produces, the gas such as volatile small molecule are discharged by exhaust system.When machine run a period of time after or
When the mesh of filter plate blocks, with manual operation handspike and then mesh cleaning plate can be promoted to move up to positioning plate, to net
Hole is cleared up, and due to the presence of positioning plate, can be prevented the mesh cleaning bar contact screw rod on mesh cleaning plate, be avoided the two
Damage.Mesh cleaning plate can also play the role of draining liquid phase material, liquid phase material is flow to melt discharging pump, open
Melt discharging pump extracts liquid phase material.Since impurity can be contained in the miscellaneous plastic of recycling, it is necessary to after one of filter screen again
Carry out extruding pelletization.When blocking filter screen when the impurity of filter screen filtration is excessive, melt discharging pump can be closed, quickly to
Upper extraction filter screen, is inserted into a new filter screen, is then then turned on Melt Pump and continues to produce.
Above-mentioned embodiment and attached drawing are the further explanations to present patent application, but patent right of the present invention
Claimed scope is not limited to the scope described in embodiment, all using equivalent substitution or the technology of equivalent deformation
Scheme, all falls within the protection domain of the claims in the present invention.
Claims (3)
- The equipment 1. a kind of miscellaneous plastic sub-prime is rised in value, it is characterised in that：Including driving motor（1）, retarder（2）, engine base, shaft coupling Device（3）, screw rod（6）, machine barrel（4）, heating system（8）, exhaust system（7）, filter plate（15）, handspike, mesh cleaning plate （17）, melt discharging pump（13）, filter screen（10）, extrusion die（11）With solid phase discharge gate（9）；The retarder（2）Pass through Stent（20）It is fixed on engine base（23）On, retarder（2）One end and driving motor（1）It is connected, the other end and shaft coupling（3）Even Connect, three constitutes the transmission system of equipment；The machine barrel（4）Pass through three stents（20）It is fixed on engine base（23）On, machine barrel （4）On offer exhaust system（7）And charge door（5）；The screw rod is gradually reduced type screw rod for pitch, is placed in machine barrel（4）It is interior Portion, one end are connected with transmission system output terminal, the other end and solid phase discharge gate（9）It is adjacent；The heating system（8）It is broadly divided into Upper and lower two parts, heating system（8）On be partially installed on machine barrel（4）Outer wall, heating system（8）Lower part be installed on one Block tablet（21）On, tablet is installed on the shell of right end（22）On；The filter plate（15）Positioned at screw rod（6）Lower section, with machine barrel （4）It is combined and forms a hollow cylinder, filter plate（15）Close to solid phase discharge port（9）End be equipped with one piece positioning Plate（14）, for positioning mesh cleaning plate（17）Position, avoid mesh cleaning bar（18）Touch screw rod（6）, cause both Damage, the mesh cleaning plate of circular arc type（17）Drainage liquid phase material can also be played and flow to melt discharging pump（13）Effect；Institute State mesh cleaning plate and be located at filter plate（15）Underface, tablet（21）Top, utilize movable hinged shoe（19）With filter plate （15）Connection, can move vertically up and down, mesh cleaning plate（17）It correspond to filter plate（15）On mesh（15-1）Position is set Put, mesh cleaning plate（17）On accordingly arrange many mesh cleaning bars（18）；The handspike（16）It is installed on tablet（21） On, one end and mesh cleaning plate（17）It is connected as one, the other end is placed in device external, for controlling mesh cleaning plate manually Movement；The solid phase discharge gate（9）Positioned at screw rod（6）Least significant end, and extend to by pipeline the lateral outer of equipment；It is described Melt discharging pump（13）Positioned at solid phase discharge gate（9）Lower section, and with solid phase discharge gate（9）It is isolated, melt discharging pump（13）Under Fang Youyi heating coils, for melt discharging pump（13）Heated；The extrusion die and melt discharging pump（13）Phase Connection, realizes the extruding pelletization of melt material, extrusion die（11）On offer discharge port, and heating mantle is installed（12）, Prevent liquid phase material from cooling down and blocking discharge port（11-1）；The filter screen（10）It is installed on melt discharging pump（13）With extrusion die Head（11）Between.
- A kind of 2. miscellaneous plastic sub-prime increment equipment according to claim 1, it is characterised in that：The filter plate is can Detachable, and be combined with machine barrel and form a hollow cylinder；And below screw rod, it is close to screw rod setting；Cross For filter plate leading portion without mesh, back segment is evenly distributed with many apertures.
- A kind of 3. miscellaneous plastic sub-prime increment equipment according to claim 1 or 2, it is characterised in that：The filter screen For the filter screen of plug-in, the filter screen of different meshes can be installed as needed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610897980.9A CN106313479B (en) | 2016-10-15 | 2016-10-15 | A kind of miscellaneous plastic sub-prime increment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610897980.9A CN106313479B (en) | 2016-10-15 | 2016-10-15 | A kind of miscellaneous plastic sub-prime increment equipment |
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| Publication Number | Publication Date |
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| CN106313479A CN106313479A (en) | 2017-01-11 |
| CN106313479B true CN106313479B (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610897980.9A Active CN106313479B (en) | 2016-10-15 | 2016-10-15 | A kind of miscellaneous plastic sub-prime increment equipment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108515715A (en) * | 2018-04-13 | 2018-09-11 | 宁波清智环保科技有限公司 | Environmental-protection garbage retracting device |
| CN109661107B (en) * | 2018-11-29 | 2022-05-17 | 广东骏亚电子科技股份有限公司 | PCB resin hole plugging process |
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| DE102013206949A1 (en) * | 2013-01-09 | 2014-07-10 | Royal Steel Plastic Technology Industrial Co., Ltd. | Filter device for filtering of plastic materials, particularly molten plastic material, has control valve that is fixed in guide element in cleaning passage to open and close cleaning passage |
| CN204209946U (en) * | 2014-11-05 | 2015-03-18 | 天津辉达斯高分子环保材料有限公司 | A kind of Novel double-screw extruder |
| CN204398300U (en) * | 2015-01-05 | 2015-06-17 | 舟山市安格机械有限公司 | Extruder high efficiency fluid filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10150796C2 (en) * | 2001-10-15 | 2003-08-07 | Collin Gmbh Dr | Apparatus for testing the purity of plastic melts |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4406549A1 (en) * | 1993-03-02 | 1994-09-08 | Barmag Barmer Maschf | Method of cleaning polymer plastics and apparatus for carrying out the method |
| EP0689918A1 (en) * | 1994-06-28 | 1996-01-03 | Cb System Srl | A filtering device for the purification of recycled plastic materials |
| CN202934790U (en) * | 2012-12-05 | 2013-05-15 | 舟山市定海金锚塑化机械制造厂 | Automatic filtration single screw extruder barrel |
| DE102013206949A1 (en) * | 2013-01-09 | 2014-07-10 | Royal Steel Plastic Technology Industrial Co., Ltd. | Filter device for filtering of plastic materials, particularly molten plastic material, has control valve that is fixed in guide element in cleaning passage to open and close cleaning passage |
| CN204209946U (en) * | 2014-11-05 | 2015-03-18 | 天津辉达斯高分子环保材料有限公司 | A kind of Novel double-screw extruder |
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| CN106313479A (en) | 2017-01-11 |
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