CH435693A - Method and device for the production of blocks from practically parallel thermoplastic hollow fibers - Google Patents
Method and device for the production of blocks from practically parallel thermoplastic hollow fibersInfo
- Publication number
- CH435693A CH435693A CH711765A CH711765A CH435693A CH 435693 A CH435693 A CH 435693A CH 711765 A CH711765 A CH 711765A CH 711765 A CH711765 A CH 711765A CH 435693 A CH435693 A CH 435693A
- Authority
- CH
- Switzerland
- Prior art keywords
- winding
- sectors
- hollow
- cutting
- drum
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 19
- 239000012510 hollow fiber Substances 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920001169 thermoplastic Polymers 0.000 title description 3
- 239000004416 thermosoftening plastic Substances 0.000 title description 3
- 238000004804 winding Methods 0.000 claims description 33
- 238000005520 cutting process Methods 0.000 claims description 17
- 238000005245 sintering Methods 0.000 claims description 7
- 238000009987 spinning Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000009730 filament winding Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 2
- 241000700605 Viruses Species 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/021—Manufacturing thereof
- B01D63/0232—Manufacturing thereof using hollow fibers mats as precursor, e.g. wound or pleated mats
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
- B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
- B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
- B29C65/223—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire comprising several heated wires
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
- B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
- B29C65/7433—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a wire
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5227—Joining tubular articles for forming multi-tubular articles by longitudinally joining elementary tubular articles wall-to-wall (e.g. joining the wall of a first tubular article to the wall of a second tubular article) or for forming multilayer tubular articles
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
- B29C69/002—Winding
- B29C69/003—Winding and cutting longitudinally, e.g. for making O-rings; chain links, insulation tubes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
- D01G1/02—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form
- D01G1/04—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form by cutting
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
- B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/14—Filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
- B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
Verfahren und Vorrichtung zur Herstellung von Blöcken aus praktisch parallelen thermoplastischen Hohlfäden
Die Erfindung betrifft ein Verfahren zur Hersbelç lung von Blöcken aus gebündelten Hohlfäden, deren gegenseitige Anordnung ein Maximum an Parallelität aufweist.
Die Erfindung betrifft ferner eine Vorrichtung zur Durchführung dieses Verfahrens.
Durch die Erfindung soll das Problem gelöst werden, in rationeller und präziser Weise einen schaumstoffähn lichen Körper mit anisotropen physikalischen Eigenschaften aus hohlen gesponnenen Fäden, vorzugsweise aus einem thermoplastischen Werkstoff oder Glas, herzustellen.
Derartige schaumstoff ähnliche Körper zeichnen sich besonders durch ihre grosse Leichtigkeit, ihre Billigkeit und insbesondere, durch eine wesentlich erhöhte statische Festigkeit in einer Richtung aus.
Einem nicht bekannten Vorschlag zufolge wurde der von der Spinndüse kommende Faden auf eine Trommel aufgewickelt, und nach Erreichen eines bestimmten Durchmessers wurden die Fadenlagen auf der Trommel aufgeschnitten, auseinandergelegt und beispielsweise durch Druck-und Wärmeeinwirkung zu einem Block zusammengesintert, wobei das Kappillarvolumen aufrechterhalten wurde.
Es hat sich jedoch gezeigt, dass nach diesem Verfahren nicht in jeden Falle wirtschaftlich gearbeitet werden kann. Vor allem aber hatten die so erzeugten anisotropen Hohllädenstrukturen nicht die präzise parallele Ordnung, die für viele Einsatzzwecke, z. B. für die Verbindung thermoplastischer Kapillargerüststoffe mit Metalihäuten oder Duroplastiolien zu Sandwichplatten, erforderlich ist.
Die vorliegende Erfindung ist gekennzeichnet durch die Kombination von mehreren aufeinanderfolgenden Verfahrensschritten. Demgemäss wird zunächst ein Strang relativ weniger (z. B. bis zu etwa 300 Stück) Hohifäden aus einem stationären Spinnkopf auf eine Trommel lagenweise unter vielzähligen Umläufen aufgewickelt.
Die Mantelfläche der Trommel ist in jedem Falle konvex auslgestalteb. Nach Brreichen einer gewünschten Wickeidicke wird der so gebildete Wickel senkrecht zu den Fadenachsen abgepresst und unter dieser Abpressung in der gleichen Richtung in einzelne Wickelsektoren aufgeschnitten, weiterhin werden während oder nach diesen Schnitten die durch diese Schnitte gebildeten offenen Kapillarenstirnseiren gegenseitig miteinander verbunden und dadurch die Wickelsektoren in sich vorfixiert.
Nach dem Zerschneiden und Vorfixieren wird die Pressung des Wickels aufgehoben und die gebildeten, in sich vorfixierten Wickelsektoren einer Druck- und Wärmebehandlung zugeführt, bei welcher die durch den Wickelprozess aneinandergelegten Hohlfäden unter Erhalten ihrer Struktur miteinander verschweisst werden. Die Druckbehandlung soll hierbei vorteilhafterweise quer und längs zur Hohlfadenachse erfolgen.
Die Mantelfläche der Trommel, die konvex ausgestaltet sein soll, kann einen Kreiszylinder darstellen, Der radiale Schaut durch die Trommel ist dann ein Kreis. Es ist aber auch möglich, dass dieser radiale Schnitt ein ballige n-Eck darstellt.
Das gegenseitige Verbinden der durch den Schnitt gebildeten offenen Kapdllarstirnsheiten geschieht iQ Sinne der Erfindung durch Anwendung von Druck und Hitze, welche zweckmässig durch Strahlung oder Berührung mit heissen Gegenständen auf die Stirnflächen der Kapillaren kurzzeitig aufgegeben wird. Durch diesen Vorgang schmelzen die Kapillarstiruseiten an und verbinden sich gegenseitig miteinander.
Insbesondere wird vorgeschlagen, den Vorgang des Zerschneidens des gebildeten Wickels und des Verschmeizens der Kapillarstirnflächen durch Hitze in einem Arbeitsgang durchzuführen, dadurch, dass ein elektrisch erhitzter Draht als Schnittwerkzeug benutzt wird, der durch seine Wärmeenergie die Kapillaren zertrennt und ihre Stirnseiten miteinander verschmilzt.
Zur Durchführung dieses Verfahrens wird eine Vorrichtung vorgeschlagen, die einen Extruder mit mehr düsigem Spinnkopf und eine drehbare Trommel auf weist. Die Vorrichtung enthält weiter ein Führungsglied für eine changierende Aufwicklung des Hohlfadenstran ges auf die Trommel, Wickel-Abpressplatten, thermo elektrisch erhitzte Schneidedrähte und gegebenenfalls eine Sinterform.
Weitere Einzelheiten der erfindungsge mässen Vorrichtung ergeben sich aus den Zeichnungen, in welchen beispielsweise dargestellt wird': in
Fig. 1 die Extruder-Düsenkopf-Trommelkombina- tion, in Seiten-und Draufsicht,
Fig. 2 ein Sektorausschnitt der Abpress-Schneidevor richtung an der Trommel arbeitend,
Fig. 3 ein einzelner aus dem Trommelwickel ausge schnittener und vorfixierter Wickelsektor in perspekti vischer Ansicht,
Fig. 4 eine Sinterform, gefüllt mit vorfixierten Wik kelsektoren,
Fig.
5 eine Verarbeitungsmögiichkeit des fertigen Kapillarhohlfadenblocks, bestehend aus mehreren an einandergereihten versinterten Wickelsektoren, durch
Zerschneiden zu Kapillarplatben mittels thermoelektrisch erhitzter Drähte,
Fig. 6 verschiedene Trommeiquerschnitte mit jeweils aufgewickeltem Hohlfadenwickel und Andeutung der
Wickelsektoraufteilung.
Nach Fig. 1 werden die aus der Düse 18, welche an dem Extruder 11 angeschlossen ist, austretenden
Hohlfäden 13 über die Rolle 14 gelenkt, von dort über eine Changiereinrichtung mit Fadenöse 15 geführt und dadurch lagenweise lauf die sich drehende Trommel
16 zu dem Hohlkapillarenwickel 18 aufgewickelt. Iiie
Trommel 16 besitzt seitliche, in Sektoren aufgeteilte
Stirnwände 17, welche den Hohlfadenwickel 18 seitlich halten. In der Praxis beträgt der Durchmesser der
Trommel 16 bis zu zehn Meter. Die Dicke des Wickels
18 wird in der Praxis bis zu fünfzehn Prozent des
Wickeldurchmessers ausgebildet. (In der Draufsicht der
Fig. 1 ist der Wickel 18 auf der rechten Seite nicht dargestellt, um die Changiereinrichtung mit Fadenöse
15 sichtbar zu machen.
Nach Erreichen der End-Wickeldicke wird analog Fig. 2 lan die Trommel 16, von welcher in der Fig. 2 nur einige Sektoren dargestellt sind, eine Abpress schneidevorrichtung herangefahren, die über den ganzen Umfang oder auch nur über einen Teil des Umfanges verteilt aus Abpressplatten 19 und thermoelektrisch erhitzten Schneiddrähten 20 besteht. Diese Schneiddrähte laufen in den Zwischenräumen, die durch die sektoren ähnlichen Stirnwände 17 gebildet sind.
In Fig. 2 sind verschiedene Stadien dieses Durchschneidens des Hohlfadenwickeis mittels der Schneiddrähte 20 dargestellt, d. h. also verschiedene Schnitttiefen der Schneiddrähte 20.
Der Antrieb der Abpressplatten 19 und der Schneiddrähte 20 geschieht z. B. hydraulisch oder durch me chanische Mittel. Diese Mittel sind in Fig. 2 nicht dargestellt, da sie mit bekannten technischen Methoden erzielbar sind.
Die nach Fig. 2 gebildeten Wickelsektoren sind in der Fig. 3 nochmals als Einzelstück in perspektivischer Hinsicht dargestellt. Die Kapillarstirnseiten 21 sind durch den Wärmetrennschnitt gegeneinander verschweisst, so dass der Wickelsektor als vorfixierte Einheit transportabel ist.
Fig. 4 zeigt in abwechselnder Lage aneinanderge- reihte Wickel abschnitte laut Fig. 3, welche in einer Press-Sinterform eingesetzt sind und durch den Press druck ihre schwache Krümmung verloren haben. Diese Sinterform besteht aus Wärmepiatten 22, 22', 23, 23', welche Idurch hydraulischen oder sonstigen Druck gegeneinandergepresst werden. Die Wärmeplaüten 22, 23 werden in Richtung der dargestellten Pfeile zwischen den
Wärmeplatten 22', 23'geführt, welche die seitliche
Begrenzung der Sinterform darstellen.
Der Antrieb dieser Heizplatten ist in der Fig. 4 nicht dargestellt, da er mit bekannten technischen Me thoden erzielbar ist.
Weiterhin sind die Wickelsektoren durch die Schubkeile 24, 25 in Richtung ; der Hohlfadenachsen, also in Richtung der gezeichneten Pfeiles aneinandergepresst.
Diese axiale Verpressung in Richtung der Hohltadenach- sen ist für den Sinterprozess nicht unbedingt notwendig, aber vorteilhaft. In einer solchen Vorrichtung laut Fig. 4 werden dann durch mehrstündige Erhitzung die einge schlossenen und verpressten Kapillarwickelsektoren ver sintert.
Fig. 5 zeigt eine fabrikatorische Weiterverarbeitungs- möglichkeit eines aus der Sinterform laut Fig. 4 entnommenen Blockes aus aneinandergereihten, versin terten Hohlfädenwickelsektoren. Durch Aufschneiden in
Richtung der angegebenen strichpunktierten Linien 27 entstehen ausserordentlich präzise Querkapillarplatten
28 und zwischen ihnen mit schrägen Trennflächen ver sehene Platten 29. Die letzteren werden entweder für Verwendungszwecke eingesetzt, die nur einer Druckbelastung ausgesetzt sind, sie können aber auch dem Ausgangsspinnprozess für die Hohlfadenerzeugung als wieder aufzuschmelzender Abfall zugeführt werden.
Die in der Fig. 1 und 2 dargestellte kreiszylinderförmige Wickelwalze kann, wie bereits gesagt, auch andere Querschnitte besitzen. In Fig. 6 ist dieser Querschnitt nochmals unter A kreisförmig dargestellt. B und d C zeigen andere Querschnitte, die vorschlagsgemäss balligen n-Eck-Formen mit konvexen Flächen entsprv chen. B ist als ein balliges Viereck und C als ein balliges Zweieck zu betrachten.
Fig. 6 zeigt ausserdem noch lauf den Walzen aufgewickelte Kapillarenwickei und ihre Aufteilung zu Wikkelsektoren. Die Sektoren 30 werden für den fabrikato riechen Prozess in die Sinterform weitergeleitet. Die auf den kleinen Krümmungsradien der N-Eoke liegenden Sektoren 31 werden in der Praxis als Abfall dem Hohl fadenspinnprozess in aufgeschmolzener Form wieder zugeleitet.
Method and device for the production of blocks from practically parallel thermoplastic hollow fibers
The invention relates to a method for the production of blocks from bundled hollow fibers, the mutual arrangement of which exhibits a maximum of parallelism.
The invention also relates to a device for performing this method.
The invention aims to solve the problem of producing a foam-like body with anisotropic physical properties from hollow spun threads, preferably from a thermoplastic material or glass, in a rational and precise manner.
Such foam-like bodies are particularly characterized by their great lightness, their cheapness and, in particular, by a significantly increased static strength in one direction.
According to an unknown proposal, the thread coming from the spinneret was wound onto a drum, and after a certain diameter had been reached, the thread layers on the drum were cut open, laid apart and sintered together to form a block, for example by the action of pressure and heat, with the capillary volume being maintained.
It has been shown, however, that this process cannot be used economically in every case. Above all, however, the anisotropic hollow shutter structures produced in this way did not have the precisely parallel order required for many purposes, e.g. B. for the connection of thermoplastic capillary frameworks with metal skins or Duroplastiolien to sandwich panels is required.
The present invention is characterized by the combination of several successive process steps. Accordingly, a strand of relatively fewer (e.g. up to about 300 pieces) hollow threads from a stationary spinning head is initially wound onto a drum in layers with numerous revolutions.
The outer surface of the drum is convex in any case. After a desired winding thickness has been reached, the roll formed in this way is pressed perpendicular to the thread axes and, under this pressure, cut into individual winding sectors in the same direction pre-fixed.
After cutting and pre-fixing, the compression of the roll is released and the pre-fixed winding sectors formed are fed to a pressure and heat treatment in which the hollow fibers placed next to one another by the winding process are welded together while maintaining their structure. The pressure treatment should advantageously take place transversely and longitudinally to the hollow fiber axis.
The outer surface of the drum, which should be convex, can represent a circular cylinder. The radial view through the drum is then a circle. However, it is also possible that this radial section represents a convex n-gon.
The mutual connection of the open capillary fronts formed by the incision takes place within the meaning of the invention by applying pressure and heat, which is expediently applied briefly to the end faces of the capillaries by radiation or contact with hot objects. As a result of this process, the capillary virus sides melt and connect with each other.
In particular, it is proposed to perform the process of cutting the formed coil and fusing the capillary end faces by heat in one operation, in that an electrically heated wire is used as a cutting tool, which cuts the capillaries through its thermal energy and fuses their end faces together.
To carry out this method, a device is proposed which has an extruder with a more nozzle spinning head and a rotatable drum. The device also contains a guide member for an alternating winding of the Hohlfadenstran tot on the drum, winding press plates, thermo-electrically heated cutting wires and optionally a sintering mold.
Further details of the device according to the invention emerge from the drawings, in which, for example, is shown ': in
1 shows the extruder-nozzle head-drum combination, in side and top view,
Fig. 2 is a sector section of the Abpress-Schneidevor device working on the drum,
Fig. 3 is a single cut from the drum winding and pre-fixed winding sector in perspecti vischer view,
Fig. 4 shows a sintered mold, filled with prefixed Wik kelseectors,
Fig.
5 a processing possibility of the finished hollow capillary thread block, consisting of several sintered winding sectors lined up in a row
Cutting into capillary plates using thermoelectrically heated wires,
6 different drum cross-sections with each wound hollow filament winding and an indication of the
Winding sector division.
According to FIG. 1, the exiting from the nozzle 18, which is connected to the extruder 11
Hollow threads 13 are guided over the roller 14, guided from there over a traversing device with thread eyelet 15 and the rotating drum thus runs in layers
16 wound up to form the hollow capillary coil 18. Iiie
Drum 16 has lateral, divided into sectors
End walls 17 which hold the hollow filament winding 18 laterally. In practice the diameter is the
Drum 16 up to ten meters. The thickness of the wrap
18 is in practice up to fifteen percent of the
Formed winding diameter. (In the top view of the
Fig. 1, the winding 18 is not shown on the right side, around the traversing device with thread eyelet
15 to make visible.
After reaching the final winding thickness is analog Fig. 2 lan the drum 16, of which only a few sectors are shown in Fig. 2, a Abpress cutting device brought up, which distributed over the entire circumference or only over part of the circumference of press plates 19 and thermoelectrically heated cutting wires 20. These cutting wires run in the gaps which are formed by the end walls 17 similar to sectors.
In Fig. 2 different stages of this cutting through the hollow filament winding by means of the cutting wires 20 are shown, i. H. thus different depths of cut of the cutting wires 20.
The drive of the press plates 19 and the cutting wires 20 is done, for. B. hydraulically or by me mechanical means. These means are not shown in FIG. 2 because they can be achieved with known technical methods.
The winding sectors formed according to FIG. 2 are shown again as a single piece in a perspective view in FIG. 3. The capillary end faces 21 are welded to one another by the heat separation cut, so that the winding sector can be transported as a pre-fixed unit.
FIG. 4 shows winding sections lined up in an alternating position according to FIG. 3, which are inserted in a press-sintering mold and have lost their slight curvature due to the pressing pressure. This sintering mold consists of heat sheets 22, 22 ', 23, 23', which are pressed against one another by hydraulic or other pressure. The heat plates 22, 23 are in the direction of the arrows shown between the
Warming plates 22 ', 23', which the lateral
Represent the limitation of the sinter shape.
The drive of these heating plates is not shown in FIG. 4, since it can be achieved with known technical methods.
Furthermore, the winding sectors by the thrust wedges 24, 25 in the direction; of the hollow fiber axes, so pressed together in the direction of the arrow.
This axial compression in the direction of the hollow thread axes is not absolutely necessary for the sintering process, but it is advantageous. In such a device as shown in FIG. 4, the enclosed and compressed capillary winding sectors are then sintered ver by several hours of heating.
FIG. 5 shows a manufacturing option for further processing of a block of sintered hollow filament winding sectors that have been strung together and removed from the sintering mold according to FIG. By cutting in
In the direction of the indicated dot-dash lines 27, extremely precise transverse capillary plates are created
28 and plates 29 provided with inclined parting surfaces between them. The latter are either used for purposes that are only exposed to pressure load, but they can also be fed to the initial spinning process for hollow filament production as waste to be remelted.
The circular cylindrical winding roller shown in FIGS. 1 and 2 can, as already stated, also have other cross-sections. In Fig. 6 this cross section is shown again under A circular. B and d C show other cross-sections which, according to the proposal, correspond to spherical n-corner shapes with convex surfaces. B is to be regarded as a convex square and C as a convex triangle.
Fig. 6 also shows capillary winding still running on the rollers and their division into winding sectors. The sectors 30 are passed on to the sintering mold for the fabrikato smelling process. The sectors 31 lying on the small radii of curvature of the N-Eoke are in practice returned as waste to the hollow thread spinning process in melted form.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH711765A CH435693A (en) | 1965-05-19 | 1965-05-19 | Method and device for the production of blocks from practically parallel thermoplastic hollow fibers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH711765A CH435693A (en) | 1965-05-19 | 1965-05-19 | Method and device for the production of blocks from practically parallel thermoplastic hollow fibers |
Publications (1)
Publication Number | Publication Date |
---|---|
CH435693A true CH435693A (en) | 1967-05-15 |
Family
ID=4320218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH711765A CH435693A (en) | 1965-05-19 | 1965-05-19 | Method and device for the production of blocks from practically parallel thermoplastic hollow fibers |
Country Status (1)
Country | Link |
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CH (1) | CH435693A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2465579A1 (en) * | 1979-09-26 | 1981-03-27 | Monsanto Co | METHODS OF CUTTING HOLLOW FIBER MEMBRANES AND SEALING MEMBRANE HOLES |
EP0261728A1 (en) * | 1986-09-25 | 1988-03-30 | Organon Teknika B.V. | Manufacture of bundles of semi-permeable hollow fibres |
FR2616705A1 (en) * | 1987-06-19 | 1988-12-23 | Strauss Horst | METHOD AND DEVICE FOR MANUFACTURING PACKET OF TUBES, APPLICATIONS AND PANEL HAVING THIS PACKAGE |
WO1995035153A2 (en) * | 1994-06-22 | 1995-12-28 | Fls Miljø A/S | Mass transfer method and apparatus |
WO1999041062A1 (en) * | 1998-02-17 | 1999-08-19 | Newcourt, Inc. | Method for forming structure suitable for use as a core member |
WO1999041061A1 (en) * | 1998-02-17 | 1999-08-19 | Newcourt, Inc. | Continuous process for forming structure suitable for use as a core member |
US6506276B1 (en) | 2000-06-12 | 2003-01-14 | Newcourt, Inc. | Method for forming a cellular core member |
WO2004014530A1 (en) * | 2002-08-09 | 2004-02-19 | Ceparation B.V. | Method for the production of a ceramic or metal hollow fiber membrane module |
EP2933010A1 (en) * | 2014-04-17 | 2015-10-21 | Gambro Lundia AB | Thermoforming of fiber bundles |
-
1965
- 1965-05-19 CH CH711765A patent/CH435693A/en unknown
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2465579A1 (en) * | 1979-09-26 | 1981-03-27 | Monsanto Co | METHODS OF CUTTING HOLLOW FIBER MEMBRANES AND SEALING MEMBRANE HOLES |
EP0261728A1 (en) * | 1986-09-25 | 1988-03-30 | Organon Teknika B.V. | Manufacture of bundles of semi-permeable hollow fibres |
FR2616705A1 (en) * | 1987-06-19 | 1988-12-23 | Strauss Horst | METHOD AND DEVICE FOR MANUFACTURING PACKET OF TUBES, APPLICATIONS AND PANEL HAVING THIS PACKAGE |
EP0297945A1 (en) * | 1987-06-19 | 1989-01-04 | Maintenance Polymeres | Method and apparatus for making a multitubular assembly, applications of the assembly and panel constructed thereby |
US5032208A (en) * | 1987-06-19 | 1991-07-16 | Horst Strauss | Process for manufacturing a bundle of tubes |
WO1995035153A2 (en) * | 1994-06-22 | 1995-12-28 | Fls Miljø A/S | Mass transfer method and apparatus |
WO1995035153A3 (en) * | 1994-06-22 | 1996-03-14 | Fls Miljoe A S | Mass transfer method and apparatus |
US6309550B1 (en) | 1994-06-22 | 2001-10-30 | Fls Miljo A/S | Mass transfer method and apparatus |
US6125540A (en) * | 1998-02-17 | 2000-10-03 | Newcourt, Inc. | Continuous process for forming structure suitable for use as a core member |
US6119344A (en) * | 1998-02-17 | 2000-09-19 | Newcourt, Inc. | Continuous process for forming structure suitable for use of a core member |
WO1999041061A1 (en) * | 1998-02-17 | 1999-08-19 | Newcourt, Inc. | Continuous process for forming structure suitable for use as a core member |
US6199342B1 (en) | 1998-02-17 | 2001-03-13 | Newcourt, Inc. | Method for forming structure suitable for use as a core member |
WO1999041062A1 (en) * | 1998-02-17 | 1999-08-19 | Newcourt, Inc. | Method for forming structure suitable for use as a core member |
US6506276B1 (en) | 2000-06-12 | 2003-01-14 | Newcourt, Inc. | Method for forming a cellular core member |
WO2004014530A1 (en) * | 2002-08-09 | 2004-02-19 | Ceparation B.V. | Method for the production of a ceramic or metal hollow fiber membrane module |
EP2933010A1 (en) * | 2014-04-17 | 2015-10-21 | Gambro Lundia AB | Thermoforming of fiber bundles |
CN105013327A (en) * | 2014-04-17 | 2015-11-04 | 甘布罗伦迪亚股份公司 | Method for manufacturing capillary dialyzers and device for forming adjoining annular region |
WO2015158797A3 (en) * | 2014-04-17 | 2015-12-03 | Gambro Lundia Ab | Thermoforming of fiber bundles |
CN105013327B (en) * | 2014-04-17 | 2018-02-16 | 甘布罗伦迪亚股份公司 | The device for the annular section that the method for manufacture capillary dialyzer and formation are adjoined |
US10369523B2 (en) | 2014-04-17 | 2019-08-06 | Gambro Lundia Ab | Thermoforming of fiber bundles |
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