DE1704878B1 - PLASTIC NETS AND METHOD OF MANUFACTURING THE SAME - Google Patents
PLASTIC NETS AND METHOD OF MANUFACTURING THE SAMEInfo
- Publication number
- DE1704878B1 DE1704878B1 DE19681704878 DE1704878A DE1704878B1 DE 1704878 B1 DE1704878 B1 DE 1704878B1 DE 19681704878 DE19681704878 DE 19681704878 DE 1704878 A DE1704878 A DE 1704878A DE 1704878 B1 DE1704878 B1 DE 1704878B1
- Authority
- DE
- Germany
- Prior art keywords
- threads
- nozzle
- filter
- longitudinal
- transverse
- 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.)
- Withdrawn
Links
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
- B29C48/30—Extrusion nozzles or dies
- B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
-
- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
-
- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/301—Extrusion nozzles or dies having reciprocating, oscillating or rotating parts
-
- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- 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
- B29L2028/00—Nets or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Filtering Materials (AREA)
Description
Die Netze gemäß der Erfindung haben vorzugsweise zylindrische Form, werden also als Netzschläuche hergestellt. Sie dienen vorzugsweise als Filtermäntel, insbesondere zur Herstellung von sogenannten Filterkerzen. The networks according to the invention preferably have cylindrical Form, so they are made as mesh tubes. They are preferably used as filter jackets, especially for the production of so-called filter candles.
Die Netze bestehen aus extrudierten Längs- und Querfäden aus Kunststoff. Es sind zwei überlagerte Netze vorgesehen, und zwar einmal ein grobmaschiges Stützgewebe zur Erzeugung einer gewissen Formstabilität und zum anderen ein engmaschiges Filternetz. Das Stützgewebe besteht aus verhältnismäßig dicken, in Längsrichtung verlaufenden Stützfäden 10 und etwa entsprechend dimensionierten querverlaufenden Stützfäden 11. Die Stützfäden 10 und 11 lassen verhältnismäßig große Öffnungen 12 frei, die durch ein feinmaschiges Filtergewebe bedeckt sind. Das Filtergewebe besteht aus im Vergleich zu den Stützfäden 10 und 11 wesentlich dünneren, in Längsrichtung verlaufenden Filterfäden 13 und quer dazu gerichteten Filterfäden 14. Die längs-und querverlaufenden Filterfäden sind mit geringen Abständen voneinander angeordnet, so daß ein engmaschiges Filtergewebe mit kleinen Durchtrittsöffnungen entsteht. The nets consist of extruded longitudinal and transverse threads made of plastic. Two superimposed nets are provided, one of which is a coarse-meshed supporting fabric to create a certain dimensional stability and, on the other hand, a close-meshed filter network. The supporting fabric consists of relatively thick, longitudinally extending Support threads 10 and approximately correspondingly dimensioned transverse support threads 11. The support threads 10 and 11 leave relatively large openings 12 free, the are covered by a fine-mesh filter fabric. The filter fabric consists of Compared to the support threads 10 and 11, they are much thinner and run in the longitudinal direction Filter threads 13 and filter threads 14 directed transversely thereto. The longitudinal and transverse Filter threads are arranged with small distances from one another, so that a close-meshed Filter fabric with small openings is created.
Vorzugsweise sind zumindest die in Längsrichtung verlaufenden Filterfäden 13 durchgehend über die gesamte Länge des Netzes. Dies hat zur Folge, daß auf den querverlaufenden Stützfäden 11 die in Längsrichtung verlaufenden Filterfäden 13 erscheinen, und zwar entweder auf der Innenseite oder auf der Außenseite als eng nebeneinanderliegenden Rippen (s. insbesondere F i g. 2). At least the filter threads running in the longitudinal direction are preferred 13 continuously over the entire length of the network. This has the consequence that on the transverse support threads 11, the filter threads 13 running in the longitudinal direction appear tight either on the inside or on the outside adjacent ribs (see in particular Fig. 2).
Das Filtergewebe aus den Filterfädenl3 und 14 kann, wie bei dem dargestellten Ausführungsbeispiel, im radial außenliegenden Bereich in bezug auf das aus den Stützfäden 10 und 11 gebildete Stützgewebe angeordnet sein. Das Netz kann aber auch so ausgebildet sein, daß das Filtergewebe mittig in bezug auf die Querschnittsabmessungen der Stützfäden 10 und 11 des Stützgewebes angeordnet ist oder auf der Innenseite des Stützgewebes. The filter fabric from the filter threads 3 and 14 can, as in the case of the one shown Embodiment, in the radially outer area with respect to that from the support threads 10 and 11 formed support fabric may be arranged. However, the network can also be designed in this way be that the filter fabric is centered with respect to the cross-sectional dimensions of the support threads 10 and 11 of the support fabric is arranged or on the inside of the support fabric.
In F i g. 3 ist in zwei unterschiedlichen Stellungen ein Ausführungsbeispiel eines Spritzkopfes zur Her- stellung von erfindungsgemäßen Netzen nach einem erfindungsgemäßen Verfahren teilweise dargestellt. In Fig. 3 is an exemplary embodiment in two different positions a spray head for the position of networks according to the invention after one according to the invention Procedure partially shown.
Der Spritzkopf besteht aus einem unbewegbaren Außenmantel 15 und einem konzentrisch zu diesem aegeordneten Kern 16. Der Kern 16 ist in bezug auf den Außenmantel 15 in Axialrichtung gemäß Pfeil 17 relativ verschiebbar. In der einen unteren Endstellung findet dabei ein Düsenträger 18 des Kerns 16 an einem gegenüberliegenden Düsenträger 19 des Außenmantels Anlage. In einer anderen Endstellung des Kerns 16 ist der Düsenträger 18 vom Düsenträger 19 abgehoben, derart, daß ein ringsherum laufender Düsenschlitz 20 gebildet wird.The spray head consists of an immovable outer jacket 15 and a concentric to this aegeorderen core 16. The core 16 is with respect to the outer jacket 15 relatively displaceable in the axial direction according to arrow 17. In the one lower end position a nozzle carrier 18 of the core 16 is found on an opposing nozzle carrier 19 of the outer jacket plant. The nozzle carrier is in another end position of the core 16 18 lifted from the nozzle carrier 19 in such a way that a nozzle slot running all around 20 is formed.
Die Düsenträger 18 und 19 sind mit Düsenbohrungen 21 beziehungsweise 22 versehen. Diese Düsenbohrungen 21 und 22 sind ständig, also bei jeder Stellung des~Kerns 16, offen, so daß Kunststoff extrudiert wird. Die im Querschnitt größeren und mit größerem Umfangsabstand voneinander angeordneten Düsenbohrungen 21 des Düsenträgers 18 dienen zur Bildung der in Längsrichtung verlaufenden Stützfäden 10 des Netzes, während die im Querschnitt wesentlich kleineren, mit geringerem Umfangsabstand voneinander angeordneten Düsenbohrungen 22 des Düsenträgers 19 zur Extrusion der in Längsrichtung verlaufenden Filterfäden 13 dienen. The nozzle carriers 18 and 19 are provided with nozzle bores 21 respectively 22 provided. These nozzle bores 21 and 22 are permanent, that is, in every position of the core 16, open so that plastic is extruded. The larger in cross-section and nozzle bores 21 of the nozzle carrier arranged at a greater circumferential distance from one another 18 are used to form the longitudinal support threads 10 of the network, while the cross-section is much smaller, with a smaller circumferential distance from each other arranged nozzle bores 22 of the nozzle carrier 19 for extrusion in the longitudinal direction extending filter threads 13 are used.
Querfäden, und zwar entweder querverlaufende Stützfäden 11 oder querverlaufende Filterfäden 14 werden jeweils dann gebildet, wenn der Düsenträger 18 vom Düsenträger 19 abgehoben ist.Transverse threads, either transversely extending support threads 11 or transversely extending Filter threads 14 are each formed when the nozzle carrier 18 is removed from the nozzle carrier 19 is lifted.
Das erfindungsgemäße Verfahren wird in der Weise durchgeführt, daß der Kern 16 periodisch mit unterschiedlichem Hub und unterschiedlicher Dauer von dem Düsenträger 19 abgehoben wird. In jeder Bewegungsperiode des Kerns 16 wird dieser einmal um einen größeren Betrag und längerzeitig von dem Düsenträger 19 abgehoben, zur Bildung eines querverlaufenden Stützfadens 11 und anschließend mehrmals kurzzeitig mit geringerem Hub zur Bildung einer Mehrzahl von querverlaufenden Filterfäden 14 kleineren Querschnitts und mit geringerem Abstand voneinander. The inventive method is carried out in such a way that the core 16 periodically with different stroke and different duration of the nozzle carrier 19 is lifted off. In each period of movement of the core 16 this becomes lifted once from the nozzle carrier 19 by a larger amount and for a longer period of time, to form a transverse support thread 11 and then briefly several times with a smaller stroke to form a plurality of transverse filter threads 14 smaller cross-section and closer to each other.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681704878 DE1704878B1 (en) | 1968-02-14 | 1968-02-14 | PLASTIC NETS AND METHOD OF MANUFACTURING THE SAME |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681704878 DE1704878B1 (en) | 1968-02-14 | 1968-02-14 | PLASTIC NETS AND METHOD OF MANUFACTURING THE SAME |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1704878B1 true DE1704878B1 (en) | 1972-03-09 |
Family
ID=5688771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19681704878 Withdrawn DE1704878B1 (en) | 1968-02-14 | 1968-02-14 | PLASTIC NETS AND METHOD OF MANUFACTURING THE SAME |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1704878B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1085330B (en) * | 1959-03-18 | 1960-07-14 | Norddeutsche Seekabelwerke Ag | Method and device for producing nets from thermoplastic material |
FR1303014A (en) * | 1961-07-10 | 1962-09-07 | Rical Sa | Machine for the continuous manufacture of tubes with a lacunar structure, in particular reticulated |
US3252181A (en) * | 1960-12-28 | 1966-05-24 | Alimentaire Soc Gen | Apparatus for the production of profiled pieces showing a lacunar or reticulated structure |
-
1968
- 1968-02-14 DE DE19681704878 patent/DE1704878B1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1085330B (en) * | 1959-03-18 | 1960-07-14 | Norddeutsche Seekabelwerke Ag | Method and device for producing nets from thermoplastic material |
US3252181A (en) * | 1960-12-28 | 1966-05-24 | Alimentaire Soc Gen | Apparatus for the production of profiled pieces showing a lacunar or reticulated structure |
FR1303014A (en) * | 1961-07-10 | 1962-09-07 | Rical Sa | Machine for the continuous manufacture of tubes with a lacunar structure, in particular reticulated |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
E77 | Valid patent as to the heymanns-index 1977 | ||
EGA | New person/name/address of the applicant | ||
EHJ | Ceased/non-payment of the annual fee |