NL9400190A - Method of applying layers by melting, atomizing and then spraying on a material. - Google Patents
Method of applying layers by melting, atomizing and then spraying on a material. Download PDFInfo
- Publication number
- NL9400190A NL9400190A NL9400190A NL9400190A NL9400190A NL 9400190 A NL9400190 A NL 9400190A NL 9400190 A NL9400190 A NL 9400190A NL 9400190 A NL9400190 A NL 9400190A NL 9400190 A NL9400190 A NL 9400190A
- Authority
- NL
- Netherlands
- Prior art keywords
- melting
- heated
- gas
- atomizing
- spraying
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 22
- 239000000463 material Substances 0.000 title claims description 18
- 238000002844 melting Methods 0.000 title claims description 8
- 230000008018 melting Effects 0.000 title claims description 8
- 238000005507 spraying Methods 0.000 title description 3
- 239000000758 substrate Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims 1
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 238000005245 sintering Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 238000010285 flame spraying Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/1606—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air
- B05B7/1613—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed
- B05B7/162—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed
- B05B7/1626—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed the spraying of the material involving the use of an atomising fluid, e.g. air comprising means for heating the atomising fluid before mixing with the material to be sprayed and heat being transferred from the atomising fluid to the material to be sprayed at the moment of mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/168—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed with means for heating or cooling after mixing
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Paints Or Removers (AREA)
Description
Titel : Werkwijze voor het aanbrengen van lagen door middel van het smelten, het verstuiven en daarna opsprayen van een materiaal.Title: Method for applying layers by melting, atomizing and then spraying a material.
Samenvatting :Summary :
Een methode voor het aanbrengen van materialen op substraten waarbij het materiaal eerst gesmolten wordt en daarna verstoven wordt, en met behulp van een draaggas op het substraat wordt aangebracht.A method of applying materials to substrates in which the material is first melted and then atomized, and applied to the substrate using a carrier gas.
Hierdoor is het mogelijk om bijna elk materiaal op bijna elk substraat aan te brengen.This makes it possible to apply almost any material to almost any substrate.
Probleembeschriiving :Problem description:
Er zijn welliswaar verschillende methoden om bepaalde voorwerpen van een laagje kunststof te voorzien, maar deze hebben grote beperkingen. Zo kunnen de meeste fluorpolymeren slechts middels sinteren worden aanbracht, wat inhoudt dat de omvang van het voorwerp beperkt is, dat de laagdikte beperkt is, en dat het te bedekken voorwerp tegen de sintertemperatuur bestand moet zijn.Although there are various methods for coating certain objects with plastic, these have major limitations. For example, most fluoropolymers can only be applied by sintering, which means that the size of the article is limited, that the layer thickness is limited, and that the article to be covered must be resistant to the sintering temperature.
Verder is het aanbrengen van rubberen lagen vaak een omslachtig proces.Furthermore, applying rubber layers is often a cumbersome process.
Stand der techniek :State of the art:
Er zijn verschillende werkwijzen bekend om materialen op substraten aan te brengen, waaronder vlamspuiten, extruderen en sinteren.Several methods are known for applying materials to substrates, including flame spraying, extrusion and sintering.
Bij vlamspuiten wordt poedervormig materiaal in een vlam gesmolten en wordt door de zelfde vlam op het substraat gespoten.In flame spraying, powdered material is melted in a flame and sprayed onto the substrate by the same flame.
Bij extruderen wordt het materiaal in de extruder gesmolten en met behulp van extrusiegereedschap op het substraat aangebracht.During extrusion, the material is melted in the extruder and applied to the substrate using extrusion tools.
Bij sinteren wordt het materiaal in poedervorm op het substraat aangebracht en vervolgens in een oven gesmolten.In sintering, the material is applied to the substrate in powder form and then melted in an oven.
Beschrijving van de uitvinding :Description of the invention:
Allereerst een analyse van het probleem.First of all, an analysis of the problem.
Om een bijjvoorbeeld een kunststof op een ondergrond aan te brengen moet het op een bepaald moment gesmolten worden. Om een kunststof te smelten moet het verhit worden tot een temperatuur binnen het smelttraject, waarbij elk deeltje een temperatuur binnen dat gebied moet hebben. Deeltjes met een lagere temperatuur zijn niet gesmolten, en deeltjes die een hogere temperatuur hebben gaan ontleden. Om dit te kunnen realiseren moet de energie binnen bepaalde gebieden gedoseerd en verdeeld worden. Dit gebied is per kunststof verschillend. PVC heeft bijvoorbeeld een smelttraject van 150 tot 200 °C. Om PVC van 20 °C te smelten, moet de temperatuur 130 tot 180 °C , ofwel 155 +/- 25 °C verhoogd worden. Een variatie van +/- 25 °C op een niveau van 155 °C komt overeen met een variatie van +/- 16 %. Als we aannemen dat de temperatuur coëfficiënt van de kunststof constant is, dan betekent dit dat de energie binnen +/-16 % gedoseerd en verdeeld moet worden. De onderstaande tabel laat gegevens van enkele kunststoffen zien.For example, to apply a plastic to a surface, it must be melted at a certain moment. In order to melt a plastic, it must be heated to a temperature within the melting range, with each particle having a temperature within that range. Particles with a lower temperature have not melted, and particles with a higher temperature have started to decompose. To achieve this, the energy must be dosed and distributed within certain areas. This area differs per plastic. PVC, for example, has a melting range of 150 to 200 ° C. To melt PVC at 20 ° C, the temperature must be increased from 130 to 180 ° C, or 155 +/- 25 ° C. A variation of +/- 25 ° C at a level of 155 ° C corresponds to a variation of +/- 16%. If we assume that the temperature coefficient of the plastic is constant, this means that the energy must be dosed and distributed within +/- 16%. The table below shows data for some plastics.
De variatie in procenten geeft een indicatie omtrent de verwerkbaarheid van een materiaal. Een hoge waarde geeft aan dat het materiaal gemakkelijk te verwerken is. PTFE heeft een zeer kleine waarde en is daarom ook moeilijk te verwerken.The percentage variation gives an indication of the workability of a material. A high value indicates that the material is easy to process. PTFE has a very small value and is therefore difficult to process.
Elke applicatiemethode heeft zijn eigen karateristieke waarden betreffende de energiedosering, en de energieverdeling. Hoe langer d* benodigde tijd is, des te nauwkeuriger de dosering. De volgende tabel laat enkele karateristieke waarden zien.Each application method has its own characteristic values regarding the energy dosage, and the energy distribution. The longer the time required, the more accurate the dosage. The following table shows some characteristic values.
Dit verklaard waarom PVC met bijna eik proces kan worden aangebracht, en dat PTFE alleen door middel van sinteren kan worden aangebracht.This explains why PVC can be applied with almost any process and PTFE can only be applied by sintering.
De uitvinding heft deze beperking op door het materiaal eerst langzaam te verwarmen waardoor het materiaal gelijkmatig smelt en daarna met een verwarmd gas te verstuiven en op het substraat te blazen. Het verwarmen kan gebeuren m.b.v. een extruder. Het verstuiven gaat m.b.v. een verstuifapparaat met een tunnel van verwarmd gas. Hei moeilijkste is om het materiaal te smelten. Om dit beheerst te doen wordt het materiaal voorverwarmd tot een temperatuur die net onder het smelttraject ligt, en daarna met een bestaand proces te verwerken. De variaties van dat proces spelen daardoor en te verwaarlozen rol. De volgende tabel laat de invloed van voorverwarmen op verwerkbaarheid van enkele materialen zien.The invention overcomes this limitation by first heating the material slowly so that the material melts evenly and then sprays with a heated gas and blows onto the substrate. Heating can be done using an extruder. Spraying is done with an atomizer with a heated gas tunnel. The most difficult is to melt the material. To do this in a controlled manner, the material is preheated to a temperature just below the melting range, and then processed with an existing process. The variations of that process therefore play a negligible role. The following table shows the influence of preheating on processability of some materials.
Hieruit blijkt dat als PTFE tot 290 °C wordt voorverwarmd, het middels extrusie kan worden verwerkt.This shows that if PTFE is preheated to 290 ° C, it can be processed by extrusion.
Claims (10)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9400190A NL9400190A (en) | 1994-02-07 | 1994-02-07 | Method of applying layers by melting, atomizing and then spraying on a material. |
| PCT/NL1995/000051 WO1995021028A1 (en) | 1994-02-07 | 1995-02-03 | Method for applying material to a substrate and apparatus for the implementation of the method |
| AU15458/95A AU1545895A (en) | 1994-02-07 | 1995-02-03 | Method for applying material to a substrate and apparatus for the implementation of the method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL9400190 | 1994-02-07 | ||
| NL9400190A NL9400190A (en) | 1994-02-07 | 1994-02-07 | Method of applying layers by melting, atomizing and then spraying on a material. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL9400190A true NL9400190A (en) | 1995-09-01 |
Family
ID=19863802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL9400190A NL9400190A (en) | 1994-02-07 | 1994-02-07 | Method of applying layers by melting, atomizing and then spraying on a material. |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1545895A (en) |
| NL (1) | NL9400190A (en) |
| WO (1) | WO1995021028A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE880720C (en) * | 1940-09-27 | 1953-06-25 | Dynamit Nobel Ag | Method and device for covering surfaces with polycondensation products |
| FR1115958A (en) * | 1954-10-22 | 1956-05-02 | Spray gun for thermoplastic products | |
| DE3225844C2 (en) * | 1982-07-09 | 1985-06-20 | Sprimag Spritzmaschinenbau Gmbh, 7312 Kirchheim | Method and device for applying layers of thermoplastics |
| DE3640906C2 (en) * | 1986-11-29 | 1995-05-24 | Utp Schweismaterial Gmbh & Co | Process for applying solvent-free adhesives in powder form in the initial state |
| DE3720938A1 (en) * | 1987-06-25 | 1989-01-05 | Peter Fuchs | Device for spraying liquids by means of propellent gas |
| US5639514A (en) * | 1992-07-08 | 1997-06-17 | Courtaulds Coatings (Holdings) Limited | Process for coating a metal substrate for packaging end use |
-
1994
- 1994-02-07 NL NL9400190A patent/NL9400190A/en not_active Application Discontinuation
-
1995
- 1995-02-03 AU AU15458/95A patent/AU1545895A/en not_active Abandoned
- 1995-02-03 WO PCT/NL1995/000051 patent/WO1995021028A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995021028A1 (en) | 1995-08-10 |
| AU1545895A (en) | 1995-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BV | The patent application has lapsed |