WO2024156708A1 - Lentille de projection pour projecteur de véhicule automobile et outil de moulage par injection et son procédé de production - Google Patents

Lentille de projection pour projecteur de véhicule automobile et outil de moulage par injection et son procédé de production Download PDF

Info

Publication number
WO2024156708A1
WO2024156708A1 PCT/EP2024/051555 EP2024051555W WO2024156708A1 WO 2024156708 A1 WO2024156708 A1 WO 2024156708A1 EP 2024051555 W EP2024051555 W EP 2024051555W WO 2024156708 A1 WO2024156708 A1 WO 2024156708A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
layers
projection lens
lens
injection molding
Prior art date
Application number
PCT/EP2024/051555
Other languages
German (de)
English (en)
Inventor
Bodo SCHUMACHER
Torsten Bartsch
Roland Hölz
Stephan Mark
Thomas Herr
Alexander Eissler
Original Assignee
Marelli Automotive Lighting Reutlingen (Germany) GmbH
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 Marelli Automotive Lighting Reutlingen (Germany) GmbH filed Critical Marelli Automotive Lighting Reutlingen (Germany) GmbH
Publication of WO2024156708A1 publication Critical patent/WO2024156708A1/fr

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0073—Optical laminates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C2045/1682—Making multilayered or multicoloured articles preventing defects
    • 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
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses

Definitions

  • the present invention relates to a projection lens consisting at least partially of transparent plastic for a projection light module of a motor vehicle headlight according to the preamble of claim 1, as well as an injection molding tool and a method for its production according to the preambles of the other independent claims.
  • Such a projection lens has a first optical surface and a second optical surface as well as several layers, wherein a first of the layers of the projection lens is a layer produced by injection molding plastic in a first process cycle and further layers are produced by injection molding plastic in further process cycles. Each further layer produced in a further process cycle adheres to a plastic layer produced in a process cycle preceding the further process cycle. All further layers lying between the first optical surface and the first layer form a first partial lens.
  • a second partial lens comprises all further layers lying between the second optical surface and the first layer.
  • Such an injection molding tool has a cavity suitable for producing a first optical surface and a cavity suitable for producing a second optical surface and several cavities.
  • a first of the cavities is a cavity designed for injection molding a first layer in a first process cycle.
  • Other cavities are cavities designed for producing further layers by injection molding plastic in further process cycles. wherein each further layer produced in a further process cycle adheres to a plastic layer produced in a process cycle preceding the further process cycle.
  • the cavities are designed such that all further layers lying between the first optical surface and the first layer form a first partial lens and that a second partial lens comprises all further layers lying between the second optical surface and the first layer.
  • the optical surfaces of the projection lens are its boundary surfaces, which serve as light entry surfaces and light exit surfaces when used as intended.
  • Such a projection lens, such an injection molding tool and such a process are assumed to be known per se.
  • the projection lens produced according to the known method has a first optical surface and a second optical surface.
  • the known method has several process cycles that follow one another in time, wherein in a first of the process cycles a first layer of the projection lens is produced by injection molding plastic and in at least one further process cycle further injection molding steps of plastic take place in which further layers of the projection lens are produced.
  • Each further layer that is produced in a further process cycle is injection molded onto a plastic layer that was produced in a process cycle preceding the further process cycle.
  • a second partial lens that includes all the further layers lying between the second optical surface and the first layer is produced.
  • An alternative method is the production of lenses with more than three layers on injection molding machines with one or two injection units.
  • one half of the mold is rotated with a turntable.
  • the layers are injected one after the other on the same side.
  • the cycle time is shorter than with the method according to EP 2 402 140 B1.
  • the one-sided injection results in cooling differences between the first layer and all subsequent layers. All layers after the first layer are only cooled directly until the next layer is injected over them. As a result, there is greater distortion when the lens cools down.
  • the object of the invention is to provide a projection lens as well as an injection molding tool and a method for producing projection lenses, with which the aforementioned disadvantages are avoided or at least reduced.
  • the projection lens according to the invention is characterized in that a maximum thickness of the first partial lens approximately corresponds to the maximum thickness of the second partial lens.
  • the injection molding tool according to the invention is correspondingly characterized in that the cavity designed to produce the first optical surface and the second optical surface is shaped such that a maximum thickness of the first partial lens approximately corresponds to the maximum thickness of the second partial lens.
  • the method according to the invention is characterized in that the injection molding steps are carried out such that a maximum thickness of the first partial lens approximately corresponds to the maximum thickness of the second partial lens. The thickness is the distance between the two optical surfaces.
  • the first layer has an edge onto which fastening structures are formed, with which the projection lens can be fastened in the motor vehicle headlight.
  • the projection lens has a central first layer and a first layer stack of three further layers and a second layer stack of three further layers, wherein the three further layers of each layer stack together form a partial lens.
  • each partial lens which is injected last and is therefore located furthest outward forms a cover layer, the outer surface of which represents an optical surface of the projection lens, and that the remaining layers located further inward form a core of the projection lens.
  • the injection molding tool has a transport device which is designed to remove the contents of the nth cavity, which have solidified after the plastic has been injected into a cavity of an nth station and its contents have been cooled down, from this cavity, to transport them to the next station and to place them in a cavity of the next station of the injection molding tool.
  • the injection molding tool has a rotary lifting device which is designed to hold the plastic fillings of the cavities, to move them in a predetermined direction when the halves of the injection molding tool are moved apart, to rotate them around this direction to the next station, to move them in the direction opposite to this direction, whereby the plastic fillings are placed in the next cavity halves, and then to move the halves of the injection molding tool together again, whereby the cavities are tightly closed again.
  • a rotary lifting device which is designed to hold the plastic fillings of the cavities, to move them in a predetermined direction when the halves of the injection molding tool are moved apart, to rotate them around this direction to the next station, to move them in the direction opposite to this direction, whereby the plastic fillings are placed in the next cavity halves, and then to move the halves of the injection molding tool together again, whereby the cavities are tightly closed again.
  • first cavities are connected to each other and to a first injection unit via hydraulic connections, so that the The first injection unit fills these cavities together to inject a multi-layer core of the projection lens.
  • a further preferred embodiment is characterized in that a sixth cavity is hydraulically connected to at least one further injection unit, which serves to inject a first cover layer of the projection lens to be produced.
  • the sixth cavity is hydraulically connected to a second injection unit, which serves to inject a first cover layer of the projection lens to be produced, and is hydraulically connected to a third injection unit, which serves to inject a second cover layer of the projection lens to be produced.
  • each injection unit comprises its own individual injection material feed, dosing and injection nozzle.
  • a further preferred embodiment is characterized in that injection material supply, dosing and injection are carried out via cold runners, so that the resulting plastic layers can each be injected via a cold runner and can be moved with it by means of the rotary-lifting device.
  • Figure 1 shows an example of a projection lens according to the invention in a cross-section in which the optical axis of the projection lens runs;
  • Figure 2 shows an injection molding tool having a first half and a second half
  • Figure 3 is a plan view of a six-cavity arrangement of an injection molding tool according to the invention.
  • Figure 4 shows a flow chart as an embodiment of a method according to the invention.
  • Figure 1 shows an example of a projection lens 10 according to the invention in a cross section in which the optical axis 12 of the projection lens 10 runs.
  • the optical axis 12 coincides with a light beam that passes through the optical surfaces 14, 16 of the projection lens 10 without undergoing a direction-changing refraction.
  • the projection lens 10 can be rotationally symmetrical about the optical axis 12 or have a different shape.
  • the optical surfaces 14, 16 of the projection lens 10 are its boundary surfaces that serve as a light entry surface and a light exit surface when used as intended.
  • the projection lens 10 is made of transparent plastic and has a first layer 18, which is produced during the manufacture of the projection lens 10 by injection molding of plastic in a first process cycle.
  • the first layer 18 preferably has an edge 20, onto which fastening structures 22 are formed, with which the projection lens 10 can be fastened in the motor vehicle headlight.
  • the edge 20 runs in a closed loop around the optical axis 12 and is not designed to contribute to the transport of light through the first layer 18.
  • a central region of the first layer 18 surrounding the optical axis 12 is, however, designed to contribute to the transport of light through the first layer 18. It is in particular transparent.
  • the projection lens 10 has further layers 24, 26, 28, 30, 32, 34.
  • a first further layer 24, 26 is adhered to each of the two boundary surfaces that serve as the light entry surface and as the light exit surface of the first layer 18 when used as intended.
  • On each of the two first further layers 24, 26 is preferably a second further layer 28, 30.
  • Each of the further layers 24, 26, 28, 30, 32, 34 has a central transparent region, so that the layer stack as a whole is transparent at least in the region of the optical axis 12, which runs through this region. This can continue so that a layer stack is arranged on each of the two interfaces of the central first layer.
  • the further layers 24, 26, 28, 30, 32, 34 are layers produced in further process cycles.
  • Each of the two layer stacks forms a partial lens 36, 38.
  • a second partial lens 38 results, which is defined in that it comprises all further layers 26, 30, 34 lying between the second optical surface 16 and the first (central) layer 18.
  • a maximum thickness d1 of the first partial lens 36 corresponds at least approximately to the maximum thickness d2 of the second partial lens 38.
  • the projection lens 10 has a central first layer 18 and three further layers 24, 28, 32 or 26, 30, 34, whereby the three further layers together form a partial lens 36, 38.
  • the cover layers 32, 34 differ from the other layers 18, 24, 26, 28, 30 in the quality of their interfaces.
  • the quality of the external interfaces of the cover layers 32, 34, which serve as refractive optical surfaces 14, 16, is higher than the quality of the interfaces further inside.
  • the roughness depth of the external interfaces of the cover layers 32, 24 is lower than the roughness depth of the interfaces further inside.
  • the external interfaces of the cover layers 32, 34 are therefore particularly smoother than the interfaces further inside.
  • Figure 2 shows a highly schematic view of an injection molding tool 40 which has a first half 42 and a second half 44.
  • the two halves 42, 44 join together at surfaces which appear as a line in Figure 2.
  • the first half 42 has a first separating surface 46 and the second half 44 has a second separating surface 46' which is complementary to the first separating surface 46.
  • Both halves 42, 44 can be displaced relative to one another along a straight line x so that the two halves 42, 44 can be moved apart relative to one another.
  • both halves 42, 43 can be rotated relative to one another with the straight line x as the axis of rotation.
  • the two halves 42, 44 should preferably have a k-fold symmetry, in particular a six-fold symmetry, in the separating surface 46.
  • Figure 3 shows, also very schematically, a top view of the arrangement of the cavities in the injection molding tool 40.
  • the second half 44 of the injection molding tool 40 is designed in the parting surface complementary to the parting surface of the first half of the injection molding tool, and in particular has a complementary half cavity of the second half 44 for each half cavity of the first half 42, so that when the injection molding tool 40 is joined together, in particular six cavities 48, 50, 52, 54, 62, 64 are formed as injection molds for the layers to be injected in each process cycle of the method.
  • the six cavities are arranged in a six-fold rotational symmetry.
  • Each cavity 48, 50, 52, 54, 62, 64 belongs to a station of the injection molding tool 40.
  • Each station of the injection molding tool 40 has at least one cavity 48, 50, 52, 54, 62, 64.
  • the number of cavities per station can also be greater than 1 and in particular equal to 2.
  • the number of cavities per station is the same for all stations.
  • the injection molding tool 40 is set up to move to the stations in sequence during the production of a projection lens 10 and to inject at least one layer of the projection lens 10 to be produced in each station.
  • the transport device 41 has a rotary lifting device which is designed to hold the plastic fillings of the cavities 48, 50, 52, 54, 62, 64, to move them in the x-direction when the halves 42, 44 of the injection molding tool 40 are moved apart, to rotate them around the x-direction to the next station, to move them in the direction opposite to the x-direction, whereby the plastic fillings are placed in the next cavity halves, and then to move the halves 42, 44 of the injection molding tool 40 back together, whereby the cavities 48, 50, 52, 54, 62, 64 are tightly closed again.
  • the individual layers are thereby moved via an index arm 43 of the lifting and rotating device in order to be able to spray the next layer/layers.
  • the first five cavities 48, 50, 52, 54, 62 are components of a first injection unit 56. These cavities 48', 50', 52', 54', 62' are used to inject the multilayer core of the projection lens 10.
  • a sixth cavity 64 is a component of a third injection unit 66 and is used to inject the first cover layer 32 and the second cover layer 34 of the projection lens 10 to be produced.
  • Each injection unit 56, 60, 66 comprises its own and individual injection material feed, dosing and injection nozzle.
  • the first five cavities 48, 50, 52, 54, 62 are connected to one another and to the first injection unit 56 via hydraulic connections 45, which contain the injection material feed and injection nozzles, so that the first injection unit 56 fills these cavities 48, 50, 52, 54, 62 together in each process cycle of the manufacturing process.
  • the injection material feed, dosing and injection are carried out via cold runners as hydraulic connections, so that the resulting plastic layers are each injected via a cold runner and to be able to implement this using the rotary-lifting device.
  • Cold runner systems are injection molding tool channels that are kept at a temperature below the melt temperature by means of liquid cooling or variothermal tempering of the injection mold or the cavities. Due to the low layer thicknesses, a very short cycle time is possible when manufacturing components.
  • the first cavity 48 forms a mold for the first central layer 18.
  • the first central layer 18 represents a first intermediate product for the projection lens 10 to be produced.
  • the second cavity 50 forms a receptacle for the first intermediate product produced by filling the first cavity 48 and has an additional cavity which forms a mold for a (first) further central layer 24.
  • This additional cavity is complementary to the first intermediate product with respect to the second cavity 26 and is arranged on a first side of the first intermediate product.
  • the total filling of the second cavity 26 with the first intermediate product and the filled additional cavity produced by filling the additional cavity represents a second intermediate product for the projection lens 10 to be produced.
  • the third cavity 52 forms a receptacle for the second intermediate product produced by filling the second cavity 50 and has an additional cavity which forms a mold for a (second) further central layer 28.
  • This additional cavity is complementary to the second intermediate product with respect to the third cavity 52 and is arranged on a second side of the second intermediate product which is separated from the first side of the first intermediate product by the volume of the second intermediate product.
  • the filling of the third cavity 52 produced by filling the additional cavity represents a third intermediate product for the projection lens to be produced.
  • the fourth cavity 54 forms a receptacle for the third intermediate product produced by filling the third cavity 52 and has an additional cavity which forms a mold for a (third) further central layer 30.
  • This additional cavity is complementary to the fourth cavity 54 third intermediate product and arranged on a first side of the third intermediate product, which is separated from the second side of the third intermediate product by the volume of the third intermediate product.
  • the total filling of the fourth cavity 54 with the third intermediate product and the filled additional cavity, produced by filling the additional cavity represents a fourth intermediate product for the projection lens 10 to be produced.
  • the fifth cavity 62 forms a receptacle for the fourth intermediate product produced by filling the fourth cavity 54 and has an additional cavity which forms a mold for a (fourth) further central layer 30.
  • This additional cavity is complementary to the fourth intermediate product with respect to the fifth cavity and is arranged on a second side of the fourth intermediate product which is separated from the first side of the fourth intermediate product by the volume of the fourth intermediate product.
  • the total filling of the fifth cavity 62 produced by filling the additional cavity with the fourth intermediate product and the filled additional cavity represents a fifth intermediate product for the projection lens 10 to be produced.
  • the first sides of the intermediates all lie in the same first half of the fifth intermediate, and the second sides of the intermediates all lie in the same second half of the fifth intermediate.
  • the sixth cavity 64 forms a receptacle for the fifth intermediate product produced by filling the fifth cavity 62 and has two additional cavities, each of which forms a mold for a cover layer 32, 34. These additional cavities are, taken together, complementary to the fifth intermediate product with respect to the sixth cavity 64. One of the additional cavities is arranged on the first side of the fifth intermediate product. The other of the additional cavities is arranged on the second side of the fifth intermediate product. The filled additional cavities represent the cover layers 32, 34 of the projection lens 10 to be produced. The total filling of the sixth cavity with the fifth intermediate product and the filled additional cavity produced by filling the additional cavities represents the projection lens 10 to be produced.
  • the remaining volume of the sixth cavity 64 considered without the volume of the first cavity 48, consists of a first partial volume and a second partial volume.
  • a filling of the first partial volume corresponds to the first partial lens 36
  • a filling of the second partial volume corresponds to a second partial lens 38.
  • the injection molding tool 40 is characterized in that the cavities are designed such that a maximum thickness of the first partial lens approximately corresponds to the maximum thickness of the second partial lens.
  • Figure 4 shows a flow chart as an embodiment of a method according to the invention.
  • the method is used to produce projection lenses 10 from a central first layer 18 and at least two further layers 32, 34 on an injection molding machine with three injection units 56, 60, 66, the material to be injected of the projection lens 10 being transparent plastic.
  • Each injection unit 56, 60, 66 comprises its own and individual injection material feed, dosing and injection nozzle.
  • a core of the projection lens 10 to be produced is injection molded using a first of the three injection units 56, 60, 66.
  • the core consists of one or more layers that are injected in one or more stations (cavities). The layers injected subsequently cover the layers injected previously in whole or in part.
  • the first central layer 18 is first injected in a first process cycle.
  • the first central layer 18 preferably has an edge 20 onto which fastening structures 22 are formed during injection molding, with which the projection lens 10 can be attached in the motor vehicle headlight.
  • the first central layer 18 is preferably overmolded alternately on each of its two sides with a further central layer 24, 26. This initially results in a layer structure composed of three layers.
  • the layer structure thus obtained is overmolded alternately on each of its two sides with a further central layer 28, 30, so that initially a layer structure composed of five layers is obtained. All layers adhere to their respective neighboring layer.
  • the cover layers 32, 34 whose exposed surfaces after completion of the injection processes form the optical surfaces 14, 16 of the projection lens 10, are finally sprayed on one station of the injection molding tool 40 simultaneously or on two stations of the injection molding tool 40 one after the other.
  • Each cover layer 32, 34 is sprayed with its own injection unit 60, 66. In this case, all layers adhere to their respective adjacent layer.
  • the second and further layers can also have areas 74, 76 in which they adhere directly to the first layer 18, so that there is a direct connection between these layers, which in these areas 74, 76 exists in particular without the interposition of another layer. Even more generally, at least one layer located further out has areas that directly adjoin a deeper, i.e., more inward layer, in addition to the layer on which it lies directly.
  • the cover layers 32, 34 are distinguished from the other layers of the layer structure in that the quality of their interfaces is better than the quality of the interfaces of the previously produced layer structure as an intermediate product.
  • the further layers 24, 26, 28, 30 and the cover layers 32, 34 are produced by injection molding transparent plastic in further process cycles.
  • the production of each further layer 24, 26, 28, 30 and each cover layer 32, 34 takes place by injecting plastic onto a plastic layer that was produced in a process cycle preceding the further process cycle. This results in a first partial lens 36 after the last process cycle, which is defined by the fact that it comprises all the further layers lying between the first optical surface 14 and the first layer 18.
  • a second partial lens 38 is produced, which is defined by the fact that it comprises all the other layers lying between the second optical surface 16 and the first layer 18.
  • the injection molding is carried out in such a way that a maximum thickness d1 of the first partial lens 36 corresponds at least approximately to the maximum thickness d2 of the second partial lens 38.
  • This achieves rapid and uniform cooling, which prevents distortion occurring during solidification. reduced and the cycle time is shortened.
  • Approximate correspondence is understood to mean that the thicknesses d1 and d2 do not differ by more than 50%.
  • the thicknesses d1 and d2 do not differ by more than 10%, particularly preferably by no more than 5%.
  • the projection lens has a central first layer and three further layers, whereby the three further layers together form a partial lens.
  • the last layer to be injected and therefore the outermost layer of each partial lens forms a cover layer, the outer surface of which represents an optical surface of the projection lens.
  • the remaining layers further inside form a core of the projection lens.
  • cover layers 32, 34 whose exposed surfaces after completion of the injection processes form the optical surfaces 14, 16 of the projection lens 10, are sprayed simultaneously on one station of the injection molding tool 40 or one after the other on two stations of the injection molding tool 40.
  • Each cover layer 32, 34 is preferably sprayed with its own injection unit 56, 60, 66.
  • a core consisting of up to five central layers 18, 24, 26, 28, 30 and two cover layers 32, 34 are sprayed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Engineering & Computer Science (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne une lentille de projection en matière plastique, pour un module de projection de lumière d'un projecteur de véhicule automobile, ladite lentille de projection présentant une première surface optique et une deuxième surface optique. La lentille de projection comporte une pluralité de couches, dont chacune est générée dans un cycle de processus par moulage par injection de matière plastique. Toutes les autres couches situées entre la première surface optique et la première couche forment une première lentille partielle, et toutes les autres couches situées entre la seconde surface optique et la première couche forment une seconde lentille partielle. Ainsi, une épaisseur maximale de la première lentille partielle correspond approximativement à l'épaisseur maximale de la seconde lentille partielle. L'invention concerne en outre un outil de moulage par injection et un procédé de production de telles lentilles de projection.
PCT/EP2024/051555 2023-01-23 2024-01-23 Lentille de projection pour projecteur de véhicule automobile et outil de moulage par injection et son procédé de production WO2024156708A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023101513.3 2023-01-23
DE102023101513.3A DE102023101513A1 (de) 2023-01-23 2023-01-23 Projektionslinse für einen Kraftfahrzeugscheinwerfer sowie Spritzwerkzeug und Verfahren zu ihrer Herstellung

Publications (1)

Publication Number Publication Date
WO2024156708A1 true WO2024156708A1 (fr) 2024-08-02

Family

ID=89767617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/051555 WO2024156708A1 (fr) 2023-01-23 2024-01-23 Lentille de projection pour projecteur de véhicule automobile et outil de moulage par injection et son procédé de production

Country Status (2)

Country Link
DE (1) DE102023101513A1 (fr)
WO (1) WO2024156708A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012111381A1 (fr) * 2011-02-18 2012-08-23 南部化成株式会社 Machine de moulage par injection rotative pour article moulé multicouches, procédé pour le moulage d'un article moulé multicouches et article moulé multicouches
EP2578376A1 (fr) * 2011-10-06 2013-04-10 Valeo Vision Pièce optique comprenant une ame et une pluralité de couches
US20140332991A1 (en) * 2013-04-02 2014-11-13 Engel Austria Gmbh Method and device for the production of an injection-moulded part
EP2402140B1 (fr) 2010-06-30 2016-04-20 Automotive Lighting Reutlingen GmbH Procédé de fabrication d'une lentille en matière synthétique d'un dispositif d'éclairage de véhicule automobile, lentille en matière synthétique fabriquée selon ce procédé et outil de fabrication de la lentille en matière synthétique
US20170341282A1 (en) * 2014-12-16 2017-11-30 Gebr. Krallmann Gmbh Method for manufacturing a multilayer plastic lens
KR20180129162A (ko) * 2017-05-25 2018-12-05 에이테크솔루션(주) 다층 렌즈 및 그 제조 방법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2402140B1 (fr) 2010-06-30 2016-04-20 Automotive Lighting Reutlingen GmbH Procédé de fabrication d'une lentille en matière synthétique d'un dispositif d'éclairage de véhicule automobile, lentille en matière synthétique fabriquée selon ce procédé et outil de fabrication de la lentille en matière synthétique
WO2012111381A1 (fr) * 2011-02-18 2012-08-23 南部化成株式会社 Machine de moulage par injection rotative pour article moulé multicouches, procédé pour le moulage d'un article moulé multicouches et article moulé multicouches
EP2578376A1 (fr) * 2011-10-06 2013-04-10 Valeo Vision Pièce optique comprenant une ame et une pluralité de couches
US20140332991A1 (en) * 2013-04-02 2014-11-13 Engel Austria Gmbh Method and device for the production of an injection-moulded part
US20170341282A1 (en) * 2014-12-16 2017-11-30 Gebr. Krallmann Gmbh Method for manufacturing a multilayer plastic lens
KR20180129162A (ko) * 2017-05-25 2018-12-05 에이테크솔루션(주) 다층 렌즈 및 그 제조 방법

Also Published As

Publication number Publication date
DE102023101513A1 (de) 2024-07-25

Similar Documents

Publication Publication Date Title
DE69517471T2 (de) Spritzgiessverfahren mit gegenüberliegenden Anschnitten
EP2961589B1 (fr) Procede d'obtention d'un objet en trois dimensions par fabrication additive
EP1938944B1 (fr) Procédé pour la fabrication d'un corps en matière plastique multicouche
DE19640662C1 (de) Verfahren zum Spritzgießen von dreischichtigen Spritzlingen und Vorrichtung für die Durchführung des Verfahrens
WO1998023431A1 (fr) Procede et dispositif de production d'un element en matiere plastique multicouche
DE60035666T2 (de) Verfahren und gerät zum herstellen von kontaktlinsenteilen und dafür benutzte spritzgussform
DE2228168A1 (de) Mehrfarben-Spritzmaschine für Kunststoffe
AT516284B1 (de) Formwerkzeug
EP2726265A2 (fr) Dispositif et procédé de production de pièces moulées par injection comprenant différents composants
DE69031564T2 (de) Nacheinander eingespritzte mehrkomponente einspritzgiessverfahren
DE102007051701B4 (de) Vorrichtung und Verfahren zur Herstellung mehrkomponentiger Kunststoff-Formteile
EP2029342B1 (fr) Dispositif de fermeture avec deux tables coulissantes
EP0683031A2 (fr) Procédé de fabrication d'objets en plusieurs parties moulés par injection et dispositif pour la mise en oeuvre du procédé
AT505321B1 (de) Verfahren zur herstellung optischer linsen
DE102014011135A1 (de) Verfahren und Vorrichtung zur Herstellung eines Dekorteils
EP0799683A2 (fr) Procédé pour injecter des produits à trois couches et dispositif pour conduire le procédé
EP0074473A1 (fr) Procédé et dispositif pour la fabrication de pièces de forme ou des objets en matière plastique
DE1802637A1 (de) Verfahren und Vorrichtung zur Herstellung von in sich gemustertem Material
DE2828926A1 (de) Verfahren zur herstellung eines brillenteils aus kunststoff
EP2668014B1 (fr) Procédé de moulage par injection et dispositif de moulage par injection
WO2024156708A1 (fr) Lentille de projection pour projecteur de véhicule automobile et outil de moulage par injection et son procédé de production
DE602005000776T2 (de) Vorrichtung und Verfahren zum Formen und Zusammenfügen von aus mehreren Komponenten bestehenden Objekten
DE3932047C2 (fr)
DE4408707A1 (de) Formkern zur Formkörperherstellung und Verfahren zu seiner Herstellung
BE1026382B1 (de) Verfahren und Vorrichtung zur Herstellung von Spritzlingen

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24702271

Country of ref document: EP

Kind code of ref document: A1