WO1988006961A1 - Device for granulating melted and softened materials - Google Patents
Device for granulating melted and softened materials Download PDFInfo
- Publication number
- WO1988006961A1 WO1988006961A1 PCT/DE1988/000170 DE8800170W WO8806961A1 WO 1988006961 A1 WO1988006961 A1 WO 1988006961A1 DE 8800170 W DE8800170 W DE 8800170W WO 8806961 A1 WO8806961 A1 WO 8806961A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- melt channel
- channel
- valve
- pressure medium
- medium
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 22
- 239000000155 melt Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 229920003023 plastic Polymers 0.000 claims abstract description 12
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 239000008187 granular material Substances 0.000 claims abstract description 6
- 230000000737 periodic effect Effects 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000002269 spontaneous effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 description 11
- 239000002184 metal Substances 0.000 description 10
- 239000002826 coolant Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 229920000426 Microplastic Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000008214 highly purified water Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001020 rhythmical effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- 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
- B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/23—Hay wafering or pelletizing means
Definitions
- the invention relates to a device for granulating - melting and softening materials, in particular plastics, consisting of a melt channel in which the material to be granulated is conveyed and a feed z melt channel through which a pressurized pressure intermittently as individual quantities in the melt channel is introduced, which means that the material flow of the substance to be granulated by volume displacement into individual substance portions ie Granules, is divided, and a valve through the periodic opening and closing the intermittent introduction of the pressure medium in the melt channel is controlled.
- DE-AS 15 48 912 a device for dividing flowing media into individual successive sections which are separated from one another by sections of another medium which is immiscible with the medium to be divided.
- both media are first led in separate lines to a consolidation point at which the dividing medium is injected from one side into the line leading the medium to be divided.
- the dividing medium is then pressed via a pulsating metering device into a feed line from which it is injected the medium to be divided at the union point.
- the supply of the dividing medium by means of the feed line entails that in this feed line, especially at higher ones
- turbulence can occur in the area of the union, which likewise impairs the exact division of the medium to be divided.
- US Pat. No. 4,151,251 describes a method specifically for the production of plastic granules, in which the plastic granules are produced by intermittently supplying a cooling medium into a channel leading to a plastic melt.
- Water should preferably be used as the cooling medium.
- the cooling medium is supplied via porous sintered metal, on the surface of which the plastic melt is conducted. Because of the intermittent supply of the cooling medium, the plastic melt always comes into direct contact with the sintered metal during the breaks in the supply. The contact of the plastic melt with the sintered metal entails the risk that small amounts of plastic melt penetrate into the sintered metal, remain there for too long and thus crack, whereby on the one hand the plastic melt is repeatedly contaminated and impaired and the openings in question the sintered metal.
- the use of the sintered metal requires the supply of highly purified water, since contamination in the water serving as the cooling medium continuously clogs the sintered metal.
- the connection of the sintered metal into the supply line for the cooling medium is unfavorable because there is a high pressure drop across the sintered metal due to the sharp edges of the individual pressure surges in the intermittent feeding of the
- Cooling medium are flattened.
- the invention is based on the object of designing the supply of the pressure medium causing the subdivision in such a way that the individual quantities of the pressure medium introduced into the melt channel give the substance guided in the melt channel pressure surges with the individual quantities which each divide the substance exactly.
- this is done in that the wall of the melt channel is divided transversely to the channel axis to form a joint, that the two resulting joint parts of the melt channel are movable relative to one another in the direction of the channel axis in such a way that the moved parts share a part surrounding the melt channel Form an annular gap, which is connected on its outer circumference to a recess carrying the pressure medium, and that the mutually facing surfaces of the abutment parts form the sealing surfaces of the valve.
- the one butt part is expediently designed in some areas as a tube, the tube protruding with one end into the recess and the end face of this end forming the one sealing surface.
- the end face of the tube which is flushed with the pressure medium when the valve is open, can be advantageously used as a sealing surface.
- the sealing surfaces can be made blunt or correspondingly conical.
- blunt training there is easy reworkability, e.g. to restore tightness.
- a corresponding conical design particularly high sealing effects can be achieved.
- the conical design enables a shortening of the outlet part of the melt channel following the valve.
- a liquid or a gas can be used as the pressure medium; water or is preferably used as the pressure medium Air.
- the pressure medium care must also be taken to ensure that it does not react with the substance in the melt channel or mix with it.
- the print medium must be easy to separate from the granulated material.
- the liquid In order to support the tearing apart of the material carried in the melt channel, the liquid is allowed to change to steam after entering the melt stream, which results in a spontaneous increase in volume of the pressure medium.
- a liquid In order to achieve this change in steam, a liquid should be selected as the pressure medium, which evaporates practically suddenly at ambient pressure and the usual temperature of the substance carried in the melt channel.
- the ambient pressure behind the valve results practically from the fact that there are normally no long outlet parts connected to the valve, rather it is readily possible to work with short outlet parts.
- the outlet part of the melt channel is made so short and the individual quantities of the pressure medium are such a volume that there is only one in the outlet part Portion of fabric.
- This design also has the advantage that there is practically ambient pressure behind the valve, so that here a sudden evaporation of a liquid serving as a pressure medium can take place, as a result of which the individual portions of substance are practically thrown out of the outlet part after the valve has been actuated.
- Figure 3 a device with a plurality of
- a thick-walled tube (11) protrudes from the base plate (10), the bore of which is the channel (4) in which the substance (1) to be granulated flows. Both parts are stationary. In phase 1 of the pelletizing process, the end face of the thick-walled tube bears against the discharge plate (12) and prevents pressure medium (2) from entering the channel. The feed (6) is therefore closed.
- the pressure medium (2) is located in recesses in the distributor plate (13) which is firmly connected to the discharge plate (12) '. It is under a very high pressure built up by the pressure generator (8) and has a high temperature due to the continuous-flow heater (7).
- the entire process part of the granulator consisting of the base plate (10), one or more thick-walled tubes (11), the discharge plate (12), the distributor plate (13) and other parts, is heated.
- the supply part also includes the memory (5) and the safety valve (14).
- the supply part is connected to the moving part via a flexible connection (15).
- phase 3 the feed (6) is closed again. During this process the channel (4) hits
- Plastic to be granulated polypropylene with 30% talc
- FIG. 2 shows a modification of the illustration in FIG. 1, phase 2.
- the sealing surfaces formed by the end face of the tube 11 and the relevant surface of the discharge plate 12, butt against each other. In the arrangement according to FIG. 2, these sealing surfaces are correspondingly conical, which results in a particularly good seal.
- the recess receiving the pressure medium 2 is conically elongated, resulting in a shortening of the outlet part (channel 4) compared to the embodiment according to FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873708695 DE3708695A1 (de) | 1987-03-18 | 1987-03-18 | Granulator zum granulieren schmelzender und erweichender stoffe |
DEP3708695.2 | 1987-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1988006961A1 true WO1988006961A1 (en) | 1988-09-22 |
Family
ID=6323302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1988/000170 WO1988006961A1 (en) | 1987-03-18 | 1988-03-18 | Device for granulating melted and softened materials |
Country Status (5)
Country | Link |
---|---|
US (1) | US4960547A (de) |
EP (1) | EP0329715A1 (de) |
JP (1) | JPH01502731A (de) |
DE (1) | DE3708695A1 (de) |
WO (1) | WO1988006961A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4000571C1 (de) * | 1990-01-10 | 1991-06-06 | Herbert 7853 Steinen De Huettlin | |
US5116550A (en) * | 1990-03-27 | 1992-05-26 | Perkins Newton B | Method of making biodegradable free fill foam packing material |
JP3347366B2 (ja) * | 1992-06-23 | 2002-11-20 | 塩野義製薬株式会社 | 転動造粒装置及び方法 |
US8114006B2 (en) * | 1998-10-06 | 2012-02-14 | University Of South Florida | Radio guided seed localization of imaged lesions |
DE602006017047D1 (de) * | 2006-06-14 | 2010-11-04 | Eastman Kodak Co | Verfahren zur Verarbeitung von Fotopolymer-Druckplatten, die eine Deckschicht enthalten |
US8070466B2 (en) * | 2006-10-11 | 2011-12-06 | Freund Corporation | Seamless capsule manufacturing apparatus |
US9205590B2 (en) * | 2012-03-06 | 2015-12-08 | Wisconsin Alumni Research Foundation | Polymer pelletization via melt fracture |
US11559855B2 (en) | 2017-03-14 | 2023-01-24 | Wisconsin Alumni Research Foundation | Surface topography control |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2566567A (en) * | 1946-03-20 | 1951-09-04 | Distillers Co Yeast Ltd | Production of polystyrene beads |
US3213170A (en) * | 1961-01-05 | 1965-10-19 | Bayer Ag | Process for the manufacture of granulated material of cylindrical or other form |
DE1629719A1 (de) * | 1967-10-19 | 1971-01-28 | Baker Perkins Inc | Misch- und Strangpresse mit Strangtrennvorrichtung |
US4151251A (en) * | 1977-10-25 | 1979-04-24 | Leesona Corporation | Pelletizing process |
GB2160814A (en) * | 1984-06-25 | 1986-01-02 | Usm Corp | Pelletising device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR700406A (fr) * | 1930-08-11 | 1931-02-28 | Chromographes Lebaron Freres S | Dispositif de commande à distance pour pulvérisateurs ou appareils analogues |
US3002615A (en) * | 1957-10-22 | 1961-10-03 | Jerome H Lemelson | Extrusion apparatus |
DE1548912B1 (de) * | 1965-03-26 | 1971-11-25 | Ceskoslovenska Akademie Ved | Vorrichtung zum aufteilen stroemender medien auf einzelne aufeinanderfolgende abschnitte |
US3674404A (en) * | 1970-08-06 | 1972-07-04 | Sherwood Medical Ind Inc | Extruder apparatus and accumulator |
US3708253A (en) * | 1970-09-01 | 1973-01-02 | J Lemelson | Extrusion apparatus |
-
1987
- 1987-03-18 DE DE19873708695 patent/DE3708695A1/de active Granted
-
1988
- 1988-03-18 WO PCT/DE1988/000170 patent/WO1988006961A1/de not_active Application Discontinuation
- 1988-03-18 JP JP63502536A patent/JPH01502731A/ja active Pending
- 1988-03-18 EP EP88902409A patent/EP0329715A1/de not_active Ceased
- 1988-03-18 US US07/274,934 patent/US4960547A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2566567A (en) * | 1946-03-20 | 1951-09-04 | Distillers Co Yeast Ltd | Production of polystyrene beads |
US3213170A (en) * | 1961-01-05 | 1965-10-19 | Bayer Ag | Process for the manufacture of granulated material of cylindrical or other form |
DE1629719A1 (de) * | 1967-10-19 | 1971-01-28 | Baker Perkins Inc | Misch- und Strangpresse mit Strangtrennvorrichtung |
US4151251A (en) * | 1977-10-25 | 1979-04-24 | Leesona Corporation | Pelletizing process |
GB2160814A (en) * | 1984-06-25 | 1986-01-02 | Usm Corp | Pelletising device |
Also Published As
Publication number | Publication date |
---|---|
JPH01502731A (ja) | 1989-09-21 |
DE3708695C2 (de) | 1990-10-25 |
US4960547A (en) | 1990-10-02 |
DE3708695A1 (de) | 1988-09-29 |
EP0329715A1 (de) | 1989-08-30 |
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