EP4164861A1 - Blasfolienanlage sowie verfahren zur herstellung schlauchförmiger kunststofffolie - Google Patents
Blasfolienanlage sowie verfahren zur herstellung schlauchförmiger kunststofffolieInfo
- Publication number
- EP4164861A1 EP4164861A1 EP21734307.8A EP21734307A EP4164861A1 EP 4164861 A1 EP4164861 A1 EP 4164861A1 EP 21734307 A EP21734307 A EP 21734307A EP 4164861 A1 EP4164861 A1 EP 4164861A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- melt
- fluid
- outlet gap
- plastic film
- cooling tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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
- B29C48/27—Cleaning; Purging; Avoiding contamination
- B29C48/272—Cleaning; Purging; Avoiding contamination of dies
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/27—Cleaning; Purging; Avoiding contamination
- B29C48/274—Cleaning; Purging; Avoiding contamination of the extruded 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
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/89—Internal treatment, e.g. by applying an internal cooling fluid stream
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- 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
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
Definitions
- the invention relates to a blown film plant and a method for producing tubular plastic film
- Such blown film systems are known, with a nozzle head, comprising an annular outlet for conveying out a plastic melt, with a take-off for withdrawing the melt and the tubular plastic film formed therefrom in one transport direction, and with a downwardly arranged in the transport direction and within the annular outlet of the nozzle head arranged cooling tower, wherein the cooling tower comprises at least one fluid outlet gap, from which a fluid can be guided in the radial direction onto the inside of the melt and / or the tubular plastic film.
- cooling towers known as internal bubble cooling
- this internal cooling to absorb liquid paraffin occurring during the extrusion process, which is deposited on the internal cooling, through collecting channels DE 1020 140 175 56 A1 and to discharge it through the interior of the internal cooling.
- Such a cooling tower is disclosed in DE 10 2014017 556 A1.
- the technical effort involved in removing liquid paraffins has proven to be disadvantageous.
- the object of the present invention is therefore to create a blown film plant and a method which enable liquid paraffins to be removed more easily.
- the fluid outlet gap comprises at least one interruption.
- the fluid outlet gap is no longer circumferential, as is known from the prior art, viewed in the circumferential direction of the tubular plastic film.
- liquid paraffin can collect at the upper edge of the fluid outlet gap, run along this edge and run down at the interruption under the influence of gravity.
- the fluid outlet gap is inclined at an angle with respect to the transport direction, the angle being smaller or larger than 90 °. This supports the drainage of the liquid paraffin, since a flow direction is specified.
- the fluid outlet gap overlaps itself, or if several fluid outlet gaps are provided, it becomes one The fluid outlet gap and an adjacent fluid outlet gap overlap.
- a channel is provided above or below the fluid outlet gap, which channel can be angled downwards at the interruption.
- Air is preferred as the fluid, so that in the following instead of the term “fluid outlet gap” the term “air outlet gap” will also be used.
- the innovation of the concept according to the invention consists in designing the air outlet gap interrupted or segmented and, in particular, designing it as inclined slots. Continuous cooling over the entire circumference can be guaranteed without interruption. At the same time, the resulting paraffin droplets can run over the interruptions or webs through the air gap.
- This method is characterized in that the fluid outlet gap comprises at least one interruption. This achieves the same advantages as have already been described in connection with a blown film line according to the invention.
- FIG. 1 side view of a cooling tower of a blown film line according to the invention
- Fig. 1 shows a cooling tower 1 of a blown film line according to the invention.
- This additionally comprises a nozzle head 4, which brings out a tubular melt or plastic film 6 in the transport direction 6.
- the cooling tower comprises air outlet gaps 3, from which air is given out in the radial direction in order to cool the melt or the plastic film from the inside.
- a paraffin collecting container 2 is arranged to collect the paraffin outgassed from the melt or from the plastic film, which largely condenses on the outer surface of the cooling tower 1, and to discharge it through the nozzle head via lines not shown in detail.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020207389 | 2020-06-15 | ||
| PCT/EP2021/066115 WO2021255026A1 (de) | 2020-06-15 | 2021-06-15 | Blasfolienanlage sowie verfahren zur herstellung schlauchförmiger kunststofffolie |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4164861A1 true EP4164861A1 (de) | 2023-04-19 |
Family
ID=76601203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21734307.8A Pending EP4164861A1 (de) | 2020-06-15 | 2021-06-15 | Blasfolienanlage sowie verfahren zur herstellung schlauchförmiger kunststofffolie |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4164861A1 (de) |
| WO (1) | WO2021255026A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3655846A (en) * | 1969-04-28 | 1972-04-11 | Kohjin Co | Method and apparatus for making tubular film |
| JPS5146529B2 (de) * | 1972-09-12 | 1976-12-09 | ||
| US4265853A (en) * | 1979-09-14 | 1981-05-05 | The Dow Chemical Company | Method and apparatus for forming of reinforced tube |
| BRPI0515572A (pt) * | 2004-09-22 | 2008-07-29 | Pack Ii Kft Dr | aparelho e processo para produzir mangueira de folhas de plástico extrusado |
| GB201318252D0 (en) * | 2013-10-15 | 2013-11-27 | Ap Plastics Ltd | Blown film extrusion system and process |
| DE102014017556B4 (de) | 2014-11-28 | 2019-05-16 | Hosokawa Alpine Aktiengesellschaft | Innenkühlturm für Folienblasanlagen |
-
2021
- 2021-06-15 EP EP21734307.8A patent/EP4164861A1/de active Pending
- 2021-06-15 WO PCT/EP2021/066115 patent/WO2021255026A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021255026A1 (de) | 2021-12-23 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20230116 |
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| AK | Designated contracting states |
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| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
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| 17Q | First examination report despatched |
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