WO2024252373A1 - Élément pour dispositifs d'éclairage - Google Patents

Élément pour dispositifs d'éclairage Download PDF

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Publication number
WO2024252373A1
WO2024252373A1 PCT/IB2024/055658 IB2024055658W WO2024252373A1 WO 2024252373 A1 WO2024252373 A1 WO 2024252373A1 IB 2024055658 W IB2024055658 W IB 2024055658W WO 2024252373 A1 WO2024252373 A1 WO 2024252373A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould halves
strip
length
moulding
mould
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
Application number
PCT/IB2024/055658
Other languages
English (en)
Inventor
Giuliano CAIOLA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Logica Extrusions Srl
Original Assignee
Logica Extrusions Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Logica Extrusions Srl filed Critical Logica Extrusions Srl
Priority to EP24739268.1A priority Critical patent/EP4724255A1/fr
Publication of WO2024252373A1 publication Critical patent/WO2024252373A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B29C48/03—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
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/34—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station
    • B29C33/36—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station continuously movable in one direction, e.g. in a closed circuit
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/224—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length having a profiled section, e.g. tubes, rods
    • B29C43/226—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length having a profiled section, e.g. tubes, rods having a corrugated section
    • 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
    • B29C48/303—Extrusion nozzles or dies using dies or die parts movable in a closed circuit, e.g. mounted on movable endless support
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
    • 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
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B29K2021/003—Thermoplastic elastomers
    • 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
    • B29L2031/747—Lightning equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention concerns an element for a lighting device, the device containing said element and a method for producing the said element.
  • the invention concerns an element that constitutes a part of a lighting device, such as ceiling lights, wall lights, floor lighting devices, recessed lighting devices, lighting devices that can be constrained to plasterboard walls, lighting devices for furniture or vehicles, comprising a plurality of inline LED light sources.
  • a lighting device such as ceiling lights, wall lights, floor lighting devices, recessed lighting devices, lighting devices that can be constrained to plasterboard walls, lighting devices for furniture or vehicles, comprising a plurality of inline LED light sources.
  • Applications of these lighting devices are, e.g., those in public buildings, e.g. in stations and airports, and generally where “strips” of light sources are required.
  • devices that comprise a plurality of LED or OLED light sources arranged in one or more rows, or lines, generally mounted on or hanging from the ceiling.
  • a problem of ceiling-type lighting devices with inline LED sources is to avoid that the exiting light beam can generate a glare effect for persons present in the environment and thus be inconvenient, e.g. disturbing the vision of monitors or information panels at a station or airport.
  • inner and outer side of the interface element is made with reference to the position of the element in a lighting device; in any case, in the present description the inner side is intended to be the one on which the opening with smallest dimensions is found.
  • This object is achieved by the present invention, which concerns a method for producing an interface element for a lighting device comprising a plurality of light sources aligned in a strip according to claim 1.
  • the invention further concerns an interface element according to claim 13, an apparatus for producing said interface element according to claim 8 and a lighting device comprising said interface element according to claim 15.
  • the present invention comprises the implementations in which materials with different physical characteristics (e.g. different compression or tensile stiffness) are co-extruded in the interface element.
  • the extrusion speed is controlled so as to match the translation speed of the moulds on the double vertical carousel in the moulding length.
  • the method is carried out continuously so as to achieve the invention interface element in the form of a continuous shaped strip of the desired length.
  • the strip material is a flexible material, such as e.g. a thermoplastic rubber like SBS, which may thereby be rolled up e.g. in reels.
  • At least one for each pair of mould halves is cooled in order to reduce the time in which the moulds are kept closed.
  • a mould, as formed by the two corresponding mould halves, may comprise one or more templates, where a template comprises a cavity and the corresponding openings on the inner and outer sides of the element.
  • each mould comprises only one template.
  • the volume of a shaped unit is lower than the volume of a corresponding unit of extruded strip; the volume of shaped unit means the volume defined between the two mould halves forming the moulding cavity.
  • the volume of the corresponding extruded strip means the volume of the piece of strip inserted to be shaped between the two mould halves.
  • the volume of strip material fed to the mould is from 5% to 10% or even 15% greater than the volume of cavity defined by the coupled mould halves.
  • At least one of the mould halves is equipped with means to make the excess material come out during the moulding step; in fact, in this moulding step, the material in the plastic state is compressed between the two mould halves and fills the empty space (i.e. the cavity) between them.
  • the pairs of mould halves comprise a male and a female mould half, the wall of the female mould half is provided with a venting hole to allow the excess material to come out during the moulding step. Since it is obtained by extrusion, the interface element according to the invention is free of injection points, as in the prior art.
  • the apparatus 1 comprises at least one extruder 9 known per se in the art and configured to extrude a thermoplastic material strip 10.
  • the strip 10 is carried by conveyor means 1, e.g. with rollers or a conveyor belt, to a pair of carousels 12 and 13 on which a plurality of mould halves 14 and 15 are mounted, in particular a plurality of male mould halves 15 and female mould halves 14.
  • the sides 27 of the mould halves i.e. the sides transverse to the feeding direction of the strip, have two carvings, one on each of said sides; the carvings are made on at least one mould half, preferably on both mould halves.
  • the carvings form an opening 28 which connects the moulds arranged side- by-side with each other in the moulding length 17, in such a way that the strip 10 may be shaped as a continuous shaped strip 10A which is collected by the means 20 as it exits the carousel. If it is wished to have strip portions instead of a continuous strip 10A, there will be a complete wall 27 for every n mould halves, where said complete wall defines the length of the strip which will be equal to that of n aligned mould halves.
  • At least one of the mould halves is provided with cooling means which are operated at least at the moulding length 17.
  • the invention therefore has numerous advantages both in economic terms and in production efficiency terms.
  • the invention has advantages in economic terms as it allows to decrease production costs, such as e.g. energy costs, and as it avoids the production of injection moulding moulds that have high production costs.
  • the invention has advantages in production efficiency terms as the apparatus and method allow to produce interface elements of different geometries and dimension, without having to use different moulds.
  • the invention further allows to obtain interface elements with long lengths. This allows to overcome the limitation in the known art whereby moulds may make interface elements with limitations in terms of length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Procédé et appareil de fabrication d'un élément d'interface pour un dispositif d'éclairage comprenant une pluralité de sources lumineuses alignées en une bande profilée, ladite bande profilée étant obtenue par une première étape consistant à extruder une bande de matériau thermoplastique, une deuxième étape consistant à comprimer la bande entre deux demi-moules mâle et femelle montés sur deux carrousels, une bande profilée qui comprend une pluralité d'ouvertures étant obtenue lors de l'étape de moulage durant laquelle les deux moitiés de moule sont accouplées.
PCT/IB2024/055658 2023-06-09 2024-06-10 Élément pour dispositifs d'éclairage Ceased WO2024252373A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP24739268.1A EP4724255A1 (fr) 2023-06-09 2024-06-10 Élément pour dispositifs d'éclairage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23178497.6 2023-06-09
EP23178497 2023-06-09

Publications (1)

Publication Number Publication Date
WO2024252373A1 true WO2024252373A1 (fr) 2024-12-12

Family

ID=87571144

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/055658 Ceased WO2024252373A1 (fr) 2023-06-09 2024-06-10 Élément pour dispositifs d'éclairage

Country Status (2)

Country Link
EP (1) EP4724255A1 (fr)
WO (1) WO2024252373A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226580A (en) * 1977-02-07 1980-10-07 Lupke Gerd Paul Heinrich Apparatus for producing thermoplastic tubing
US20130314796A1 (en) * 2011-02-21 2013-11-28 Kazutoshi Hitomi Light reflection plate
WO2014138295A2 (fr) * 2013-03-06 2014-09-12 The Sloan Company, Inc. Dba Sloanled Système d'éclairage à boîte de lumière en angle
EP3109535A1 (fr) * 2015-06-23 2016-12-28 USM Holding AG Module d'application a inserer dans un tube d'une structure tubulaire porteuse tridimensionnelle d'un systeme de meuble

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226580A (en) * 1977-02-07 1980-10-07 Lupke Gerd Paul Heinrich Apparatus for producing thermoplastic tubing
US20130314796A1 (en) * 2011-02-21 2013-11-28 Kazutoshi Hitomi Light reflection plate
WO2014138295A2 (fr) * 2013-03-06 2014-09-12 The Sloan Company, Inc. Dba Sloanled Système d'éclairage à boîte de lumière en angle
EP3109535A1 (fr) * 2015-06-23 2016-12-28 USM Holding AG Module d'application a inserer dans un tube d'une structure tubulaire porteuse tridimensionnelle d'un systeme de meuble

Also Published As

Publication number Publication date
EP4724255A1 (fr) 2026-04-15

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