EP0411087A1 - A curing apparatus - Google Patents
A curing apparatusInfo
- Publication number
- EP0411087A1 EP0411087A1 EP19900902804 EP90902804A EP0411087A1 EP 0411087 A1 EP0411087 A1 EP 0411087A1 EP 19900902804 EP19900902804 EP 19900902804 EP 90902804 A EP90902804 A EP 90902804A EP 0411087 A1 EP0411087 A1 EP 0411087A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner casing
- housing
- reflector means
- ultra
- source
- 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.)
- Ceased
Links
- 230000005855 radiation Effects 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011358 absorbing material Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract 1
- 238000004073 vulcanization Methods 0.000 abstract 1
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000005388 borosilicate glass Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/123—Ultraviolet light
Definitions
- This invention relates to a curing apparatus, for example for curing materials such as synthetic plastics, printing inks, resins or the like, by means of an ultra ⁇ violet radiation source.
- such an apparatus has consisted of an ultra ⁇ violet source, disposed in a semi-circular or parabolic reflector, the source being directed at the material to be cured so that the required curing is accomplished during the necessary time.
- the process may be performed either on a continuously moving material supported, for example, on a conveyor or in an intermittent manner, the ma.terial dwelling in the treatment region or zone for the requisite time.
- the materials which can be treated are webs of synthetic plastics, or of paper, or of some other base, coated with a synthetic resin, the plastics or the resin requiring to be cured by the use of ultra-violet radiation.
- a particular problem associated with the known apparatus is, apart from the ultra-violet radiation which is used to effect the curing, a large and undesirable amount of infra-red radiation is also generated, accompanied by unacceptable amounts of heat.
- the present invention seeks to provide an apparatus which overcomes the disadvantages of the known apparatus .
- a curing apparatus consists of a housing in which is mounted an ultra-violet radiation source, the housing also supporting an inner casing which is spaced from the housing and supports reflector means, the reflector means consisting of at least one sheet of dichroic material arranged in the inner casing in such a manner as to reflect ultra-violet radiation from the source striking it back towards the material to be treated, the inner casing supporting the reflector means in such a way as to enable an air flow between the inner casing and the reflector means. Means are also provided to provide an air flow between the interior of the housing and the inner casin .
- the inner casing is rotatable about the ultra-violet radiation source, into a position in which it forms a shield between the source and the material to be subjected to the radiation.
- the reflector means comprises at least one panel of a transparent, glass-like material which reflects ultra-violet radiation but which allows infra-red radiation and the accompanying heat to pass through it.
- the material of the reflector means may be a ceram, or a borosilicate glass, provided with a coating so that the reflector means is in the form of a dichroic reflector.
- the reflector means may comprise two reflectors shaped as half parabolas as seen from one end.
- the ultra-violet source is typically an elongated element, the reflector means extending along the length of the source, between the source and the inner casin .
- the housing is preferably arranged to extend over a treatment region or zone, along which the ultra-violet source extends with the associated reflector means; the inner casing is provided on its inner surface, facing the reflector means with a heat-absorbing coating " or surface.
- Figure 1 shows, in diagrammatic form, a cross-section of the apparatus
- Figure 2 is a diagrammatic, partly cut-away perspective view of the apparatus as seen from below.
- the apparatus consists of an elongated housing 1 which is generally trough- or channel- shaped and is arranged to extend over a treatment region or zone, for example above a conveyor belt.
- the length of the housing 1 is determined by the dimensions of the material to be radiated and the time for which it must remain in the treatment region. In certain instances, the housing may be several metres in length.
- Supported inside the housing 1 in such a manner as to provide a space between it and the housing is an inner casing 2, which is in the form of a semi-circular trough extending along the housing and treated on its inner surface with a heat-absorbing material or coating.
- the outer surface of the inner casing 2 may be provided with heat-dissipating ribs or fins 8 and is made, for example, from an aluminium extrusion or casting.
- an ultra-violet radiation source 3 Disposed in the central region of the housing 1 and extending along the interior of the inner casing 2 is an ultra-violet radiation source 3, supported at least at each end by suitable fittings. At each end of the inner casing is an end panel member 4. Intermediate supports may be provided if the length of the source so requires.
- the end panel members 4 form the ends of the inner casing 2 and also, with the casing, support the reflectors ⁇ which are arranged in the casing in such a manner as to reflect ultra-violet radiation from the source 3 back down to the treatment zone or region.
- the reflectors ⁇ are preferably made of flat sheets of a transparent, glass-like material such as a ceram or borosilicate glass, coated to form dichroic reflectors. However, they may also be in the form of half-parabolic sections, where the focusing of the reflected ultra-violet radiation needs to be improved.
- Cooling air is also arranged to pass through the space 6 between the outer surface of the inner casing 2 and the interior of the housing 1, the ribs or fins 8 on the inner casing 2 assisting in the transfer of heat.
- an ultra-violet source used to cure such materials as synthetic plastics or resins is rated at a power of some 80 Watts for each centimetre of its working length, so that for a long tubular source, the amount of heat that would be generated largely by the infra-red radiation could damage the material being treated.
- a dichroic material such as a suitably- coated transparent glass-like material for the reflector means enables the major proportion of the reflected ultra ⁇ violet radiation to be redirected back to the treatment region, while the major part of the infra-red radiation impinging on the reflectors passes through the reflectors, so reducing the amount of heat being directed into the treatment region.
- the inner casing 2, with the reflector means ⁇ is arranged to be able to rotate about the longitudinal axis of the source 3, into a position where the casing 2 provides a shield between the source and the material being treated.
- Eotation is obtained, for example, by means of an electric motor, driving the inner casing through a clutch, limit switches being provided to control the amount of rotation..
- one end of the inner casing is provided with a split bearing 9, which enables the casing to revolve around the source, while . at the same time facilitating the replacement of the source in the event of a failure.
- Tests ' have indicated that as much as 90% of the ultra ⁇ violet radiation striking the reflector means can be directly transmitted or reflected into the treatment region, while a similar percentage of the infra-red radiation and associated heat impinging on the reflector means escapes into the intermediate space between the reflector means and the inner casing, to be extracted. Additional cooling is applied to the space between the interior of the housing and the inner casing to amplify the cooling effect.
- the treatment of materials in the. treatment region or zone can be effected under conditions of reduced temperature in the treatment zone, so reducing the risk of damage to the material or any supporting substrate or member, irrespective of whether the process is carried out continuously or intermittently.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Microbiology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
L'appareil de vulcanisation décrit comprend un logement (1), dans lequel est monté une source de rayonnement ultraviolet (3) et qui soutient également une cuve interne (2), laquelle est séparée du logement (1) et porte un organe réflecteur dichroïque (5), qui est composé d'au moins une feuille de matériau dichroïque semblable au verre disposé dans la cuve interne (2), de façon à réfléchir le rayonnement ultraviolet provenant de la source (3) et à le renvoyer en direction d'un matériau à traiter. La cuve interne (2) porte l'organe réflecteur (5) de façon à permettre la création d'un courant d'air dans un espace (7) compris entre la cuve interne (2) et l'organe réflecteur (5). L'organe réflecteur (5) peut être rotatif autour de la source de rayonnement (3), de façon à être placé dans une position dans laquelle la source est protégée du matériau traité.The vulcanization apparatus described comprises a housing (1), in which is mounted a source of ultraviolet radiation (3) and which also supports an internal tank (2), which is separated from the housing (1) and carries a dichroic reflector member (5), which is composed of at least one sheet of dichroic material similar to glass arranged in the internal tank (2), so as to reflect the ultraviolet radiation coming from the source (3) and to return it in the direction of a material to be treated. The internal tank (2) carries the reflective member (5) so as to allow the creation of a current of air in a space (7) between the internal tank (2) and the reflective member (5). The reflecting member (5) can be rotatable around the radiation source (3), so as to be placed in a position in which the source is protected from the treated material.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8902544 | 1989-02-06 | ||
GB898902544A GB8902544D0 (en) | 1989-02-06 | 1989-02-06 | A curing apparatus for plastics,printing inks,synthetic resins or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0411087A1 true EP0411087A1 (en) | 1991-02-06 |
Family
ID=10651167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900902804 Ceased EP0411087A1 (en) | 1989-02-06 | 1990-02-06 | A curing apparatus |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0411087A1 (en) |
GB (1) | GB8902544D0 (en) |
WO (1) | WO1990008591A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3094902B2 (en) * | 1996-03-27 | 2000-10-03 | ウシオ電機株式会社 | UV irradiation device |
GB9607129D0 (en) * | 1996-04-04 | 1996-06-12 | Gew Ec Ltd | Uv dryer with improved reflector |
GB0119543D0 (en) * | 2001-08-10 | 2001-10-03 | Analytical Sciences Ltd | Method of and apparatus for use in the digestion of liquid samples |
CA2676622C (en) * | 2006-12-11 | 2016-02-02 | Air Motion Systems, Inc. | Uv module |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4025795A (en) * | 1975-05-27 | 1977-05-24 | Ppg Industries, Inc. | Ultraviolet light processor having rotating shutters |
DE3416502A1 (en) * | 1984-05-04 | 1985-11-07 | Goldschmidt Ag Th | DEVICE FOR CURING FLAT-MATERIAL MATERIALS FROM CONNECTIONS OR PREPARATIONS THAT ARE CURABLE BY UV RADIATION |
CH660489A5 (en) * | 1984-08-31 | 1987-04-30 | Bernhard Glaus | METHOD AND DEVICE FOR CURING POLYMERIZABLE COATING MEASURES ON NON-TEXTILE SUBSTRATES. |
-
1989
- 1989-02-06 GB GB898902544A patent/GB8902544D0/en active Pending
-
1990
- 1990-02-06 WO PCT/GB1990/000178 patent/WO1990008591A1/en not_active Application Discontinuation
- 1990-02-06 EP EP19900902804 patent/EP0411087A1/en not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO9008591A1 * |
Also Published As
Publication number | Publication date |
---|---|
GB8902544D0 (en) | 1989-03-22 |
WO1990008591A1 (en) | 1990-08-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2889672B2 (en) | Radiant assembly and heating device for heating a support | |
CA1064859A (en) | Unit for treatment of substrate with ultraviolet radiation | |
US6973874B2 (en) | Zoned ultraviolet curing system for printing press | |
US4811493A (en) | Dryer-cooler apparatus | |
US3786230A (en) | Radiant heater | |
US7669530B2 (en) | UV curing assembly having sheet transfer unit with heat sink vacuum plate | |
EP0265939B1 (en) | Apparatus and method for curing photosensitive coatings | |
KR940023316A (en) | Radiation source with separate optical area | |
WO1999053237A1 (en) | Heating method and lamp array | |
US20020118541A1 (en) | Lamp assembly | |
CA2290699A1 (en) | Apparatus for generating controlled radiation for curing photosensitive resin | |
EP0411087A1 (en) | A curing apparatus | |
EP3165860A1 (en) | Device and method for product drying | |
EA022385B1 (en) | Method and device for heating polymer products | |
US3311743A (en) | Outdoor lighting fixture | |
US6599585B2 (en) | UV curing system for heat sensitive substances and process | |
US2156352A (en) | Heating device | |
WO2006067499A1 (en) | Reflector system | |
JPS6217214B2 (en) | ||
KR20020042655A (en) | Device for heating a meltable material | |
EP1050876B1 (en) | Device for curing a UV-curable resin layer applied to a main surface or between two disc elements of a disc-shaped registration carrier | |
KR910700146A (en) | Device for securing the end ring to the rotary screen printing stencil | |
US7411202B2 (en) | Irradiating apparatus | |
CN217985840U (en) | Infrared light source heat dissipation device of color sorter | |
SU1008591A1 (en) | Heliodryer for loose materials |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19910205 |
|
17Q | First examination report despatched |
Effective date: 19910923 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19920601 |