Abstract: An injection molding machine includes: a storage configured to store information showing relationships between a plurality of operation processes included in a molding process for the product and a plurality of molding controls related to the operation processes, and information showing relationships between the molding controls and a plurality of molding defects of the product; a display which is configured to display a plurality of the operation processes and the molding defects, and displays the molding controls related to a selected operation process selected from a plurality of the operation processes by an operator and a selected molding defect selected from a plurality of the molding defects by the operator as relevant molding controls; and a controller configured to extract the molding controls as the relevant molding controls, based on a table preset from a plurality of the operation processes and the molding defects.

Abstract: The present invention relates to a container manufacturing apparatus having three-dimensional shape, and more specifically, to a container manufacturing apparatus capable of quickly manufacturing a container having three-dimensional shape in quantity by using a pre-form manufactured in advance.

Abstract: An apparatus for a nozzle is provided for engaging with lightweight preforms for blow-molding the preforms into plastic containers without damaging the finish portion of the preforms. The nozzle comprises a first cylindrical portion including a first seal, a second cylindrical portion including a second seal, and a tapered portion between the first and second cylindrical portions. The first and second cylindrical portions include diameters that are less than respective diameters of interior surfaces within the finish portion. The first and second seals are disposed around respective circumferences of the first and second cylindrical portions and configured to tightly engage with the interior surfaces of the preform while maintaining clearance between the nozzle and the interior of the finish portion. In some embodiments, the seals are configured to stabilize an orientation of the preform after being pressed onto the nozzle and facilitate conveying the preform along a manufacturing line.

Abstract: This blow molding device is provided with: a display device configured to display on a setting screen information for setting control conditions for a plurality of objects to be controlled; and a display control device configured to control a display state of the setting screen. The display control device is configured to: cause a main display unit to display the information for setting the control conditions, as required; and cause a sub-display unit to constantly display status information which makes it possible to know operational states of the objects to be controlled, and a display switching icon for causing the main display unit to display operating icons of the objects to be controlled.

Abstract: An apparatus for making dental splints has a model plate forming a plurality of model-placement areas each having an upper face adapted to support a respective dental model and a lower face. Each area is formed with an opening between the respective faces, and respective conduits are connected to the lower faces of the areas at the openings. A rack for holding a thermoshapable film is movable between a position spaced from the plate and a position over the plate with the film engaging an outer edge of the plate all around the placement areas atop the plate over the models thereon. A pump or the like generates a subatmospheric pressure and applies it via the conduits to the placement areas to draw the film down over the models.

Abstract: A system and method for forming a part using a moveable heater to heat a pre-aligned blank and an alignment mechanism to maintain the alignment of the heated blank during the forming process. A frame receives and holds the blank in the pre-aligned position within an open press. The heater advances into the press to heat the pre-aligned blank to a forming temperature, and withdraws to allow the press to close and form the heated blank into the part. The alignment mechanism maintains the blank in the alignment while the blank is heated and the press is closed, and includes a rail extending through the press and the frame and allowing the press to move between open and closed positions, and a collapsible member which pushes the frame as the press closes and collapses to allow the press to fully close and form the heated blank into the part.

Abstract: A molding process includes the operation of placing insulation material comprising fibers and binder on the fibers in a mold cavity. The molding process further includes the operation of transferring heat to the insulation material to cause the binder to cure.

Abstract: The present invention discloses a packaging box of a covering film and a film applicator. By structural designs of the packaging box and the covering film, the packaging box is provided with an internal cavity matching an outer shape of an electronic device and the covering film includes a release film having an extension portion, enabling the packaging box to provide the covering film with storage, dustproof and shock-absorbing functions and to further serve as a film application auxiliary tool when a film application process is performed. Thus, a user is allowed to accurately, quickly and efficiently form a layer providing protection on a surface of the electronic device directly by using the packaging box.

Abstract: A solid freeform fabrication object includes a plurality of parts formed of hydrogels having respective physical properties, wherein the hydrogels having respective physical properties, each having a moisture content of 70 percent by mass or greater, wherein a solvent concentration difference between the hydrogel constituting adjacent parts of the plurality of parts is 5 percent by mass or less.

Abstract: A three-dimensional molding device includes a discharge unit that discharges a molding material towards a stage, a heating unit that heats the discharge unit, a temperature acquisition unit that acquires a temperature of the molding material placed on the stage, and a control unit.

Abstract: The present invention relates to a stereolithography device (100) comprising a light source (101) for emitting light to cure a light-curing material (121); a sensor (103) for determining an actual value of the light intensity of the emitted light; and a control unit (105) for adapting the electric current through the light source (101) until the actual value of the light intensity reaches a specified desired value.

Abstract: This invention relates to the method for mold-free manufacturing of natural rubber articles. Specifically, the articles can be fabricated in the stereolithography process which eliminates the need of mold making and reduces the process time significantly. The method comprises the steps of (1) preparing prevulcanized latex compound for sulfur and non-sulfur vulcanization; (2) adding processing aid to make the latex compound curable when exposed to laser irradiation, the processing aid includes heat-sensitive polymer and/or carbon material(s); and (3) fabricating of three-dimensional rubber articles by stereolithography process. The process are capable of fabricating complex shapes and internal features. As the said rubber articles contain more than 95% of natural rubber, they are highly flexible and can be translucent in some embodiments.

Abstract: Methods of controlling and/or operating an apparatus for additively manufacturing three-dimensional objects include simulating control and/or operation of at least one functionality of the apparatus using a provisional software product to check at least one pre-defined certification criterion upon which the at least one functionality of the apparatus are preconditioned, generating a machine-readable software product upon the provisional software product having satisfied the at least one pre-defined certification criterion, and controlling and/or operating the at least one functionality of the apparatus using the machine-readable software product. The software product may be generated by modifying the provisional software product based on a certification key provided to the provisional software product.

Abstract: Some examples include an additive manufacturing machine including a build chamber including a build area and a dose plate, a build material dispenser to dispense a mass of a build material onto the dose plate, a light source to transmit a light energy through the build material on the dose plate, a light sensor to sense a light energy transmitted through the build material on the dose plate, and a controller to control the build material dispenser to adjust a next build material dose mass based on a sensed light energy transmission.

Abstract: The present disclosure relates to an additive manufacturing (AM) method for making a three-dimensional (3D) object, comprising a) the provision of providing a powdered polymer material (M) comprising at least one poly(ether ether ketone) (PEEK) polymer, and at least one poly(aryl ether sulfone) (PAES) polymer, b) the deposition of successive layers of the powdered polymer material; and c) the selective sintering of each layer prior to the deposition of the subsequent layer, wherein the powdered polymer material (M) is heated before step c) to a temperature Tp (° C.): Tp<Tg+40, wherein Tg (° C.) is the glass transition temperature of the PAES polymer, as measured by differential scanning calorimetry (DSC) according to ASTM D3418.

Abstract: The present disclosure relates to an additive manufacturing (AM) method for making a three-dimensional (3D) object, comprising a) the provision of providing a powdered polymer material (M) comprising at least one polymer (P1) having a melting temperature (Tm) greater than 270° C., as measured by differential scanning calorimetry (DSC) according to ASTM D3418, and at least one polymer (P2) having a glass transition temperature (Tg) between 130° C. and 240° C., and no melting peak, as measured by differential scanning calorimetry (DSC) according to ASTM D3418, b) the deposition of successive layers of the powdered polymer material; and c) the selective sintering of each layer prior to the deposition of the subsequent layer, wherein the powdered polymer material (M) is heated before step c) to a temperature Tp (° C.): Tp<Tg+25, wherein Tg (° C.) is the glass transition temperature of the P2 polymer.

Abstract: The invention relates to a method for manufacturing an object from a material by means of additive manufacturing using a plurality of solidifying devices for solidifying said material in stacked layers by means of electromagnetic radiation. Said method comprises the step of defining, by a data processing unit, at least two solidifying device allocations. In each of said solidifying device allocations said plurality of solidifying devices are allocated to respective parts of said layer such that said parts cover said layer.

Abstract: Methods are generally provided for making an object(s) from powder. In one embodiment, the method includes: (a) applying a layer of powder on a build platform; (b) irradiating at least part of a layer of powder to form a build wall defining at least one internal cavity therein; (c) moving at least one of the build platform downward or the build unit upward in a direction substantially normal to the layer of powder; and (d) repeating at least steps (a) through (c) to form the build wall. The build wall defines at least one passageway therein, and wherein the at least one passageway has an inlet and an outlet defined in the layer of powder.

Abstract: The disclosure relates to processing machines and methods for producing three-dimensional components by irradiating powder with a processing beam, the machines including a container with a moveable support for the powder, as well as an irradiating device with a scanner device for aligning the processing beam on a processing field at an opening of the container. The irradiating device includes a heating device that includes a heating radiation source for generating a heating beam for heating the powder from above and including a beam shaping optical unit configured to convert a first beam profile of the heating beam into a second beam profile, e.g., a ring-shaped beam profile, of the heating beam.

Abstract: In an example, a composition for three-dimensional (3D) printing includes a polymer build material and a non-conductive fusing agent dispensable onto the polymer build material to form a polymer-fusing agent composite portion when heated to a sintering temperature, a conductive agent dispensable onto on the polymer build material to form a polymer-conductive agent composite portion when heated at least to the sintering temperature, the conductive agent comprising: at least one conductive particulate present in an amount of from about 10% to about 60% of a total weight of the conductive agent; at least one co-solvent present in an amount of from about 10% to about 50% of a total weight of the conductive agent; and an additive present in an amount of from about 0% to about 10% of a total weight of the conductive agent.

Abstract: Provided is a method for shaping a three-dimensional shaped object using a cutting tool configured to perform cutting at a first length at maximum in a predetermined cutting direction, the method including: a first section shaping step of shaping a first section having a length in a first direction shorter than the first length by laminating a shaping material; a first section cutting step of cutting the first section with the cutting tool having a cutting direction along the first direction; a second section shaping step of shaping a second section having a length in a second direction shorter than the first length by laminating the shaping material, to connect to a first end surface of the first section in the first direction; and a second section cutting step of cutting the second section along the second direction with the cutting tool having a cutting direction along the second direction.

Abstract: A 3D printing device includes a printing substrate, a movable printing head configured for additively producing from a modelling material a component on the printing substrate, and a flexible printing space cover which, proceeding from the printing head, spans the printing substrate such that a closed printing space is formed between the printing head and the printing substrate, wherein a printing nozzle of the printing head for applying the modelling material protrudes into the printing space. A support structure of the device includes flexible support rods which run from the printing head to the printing substrate and which hold the printing space cover above the printing substrate.

Abstract: In a method for solidifying a photopolymerizable, diffusely reflecting material by irradiation, wherein the material coats a transparent material confining element, such as a material support or a tank bottom, and the irradiation of a surface to be solidified is performed through the transparent material confining element into the material, a) the thickness of the material confining element and b) the coated surface and/or the construction field and/or the surface to be solidified of the material are adapted to one another such that the thickness of the material confining element is at least ¼, preferably at least ?, preferably at least ½, of the diameter of the coated surface, or the surface to be solidified, or the construction field, respectively.

Abstract: The present invention concerns a reservoir assembly for use in three-dimensional (3D) printing for building a 3D object, which includes a top frame that may be filled with liquid material, and a tensioned film being held underneath the top frame. The tensioned film may be air permeable and elastic at the same time, wherein surfaces of the tensioned film are micro textured so that the tensioned film becomes optically clear when it contacts with the liquid material. The tensioned film minimizes the creation of bubbles between the top and bottom surfaces. This also helps blurring the boundaries thereby enhancing the surface finish of the fabricated parts.

Abstract: Apparatuses, systems, and methods for determining a position of a nozzle of a 3D printer are described. In certain implementations, a method for determining a position of a nozzle of a 3D printer is provided. The method includes moving a nozzle assembly relative to a test feature of a calibration object such that a nozzle tip contacts the test feature for a plurality of times. The nozzle assembly includes the nozzle that has the nozzle tip. The method also includes reading positions of the nozzle when the nozzle tip contacts the test feature. The method further includes determining a relative position of an end point of the nozzle relative to a reference point.

Abstract: A method and apparatus for automatic filament change out without interruption to a 3D print task. As a filament roll runs out of filament, the tail end is detected and an automatic filament changer selects and feeds a new strand of filament to a 3D printer's extruder. The empty filament roll is replaced, the automatic filament changer can switch to a different filament roll when the new filament roll is empty, and 3D printing can run continuously with no interruptions to change out filament.

Abstract: According to some aspects, a method is provided of removing debris from a liquid photopolymer in an additive fabrication device. According to some embodiments, a mesh of solid material may be formed in an additive fabrication device from a liquid photopolymer, and particles of debris present in the liquid photopolymer may adhere to the mesh. The debris may thereby be removed from the liquid photopolymer by removing the mesh from the additive fabrication device. The mesh may then be discarded.

Abstract: An input data creation device for powder additive manufacturing that can design and provide an appropriate support that avoids manufacturing failure. The device creates input data of a model in which a support is provided to a manufacturing designed object in powder additive manufacturing. The device includes a mechanical quantity calculation unit including a mechanism configured to calculate a mechanical quantity generated on a surface to which the support is provided in the manufacturing designed object; and a support shape determination unit including a mechanism configured to determine, based on information on a plurality of types of support shapes, information on an allowable mechanical quantity defined for each support shape, and a mechanical quantity calculated by the mechanical quantity calculation unit, an optimized support shape having an allowable mechanical quantity equal to or greater than the calculated mechanical quantity from among the plurality of types of support shapes.

Abstract: A process for the additive manufacture of a part within a machine, the machine including a working surface, a device for spreading the powder layer along at least one longitudinal horizontal direction, at least one injector of powder over the working surface, the injector being movable with respect to the working surface along at least one transverse horizontal direction, and a system for regulating the amount of powder dispensed by the injector, the process including the following stages: moving the injector along a trajectory comprising at least one component parallel to the transverse horizontal direction; and regulating the amount of powder dispensed by the injector at any point of the trajectory of the injector.

Abstract: According to some embodiments, systems and methods are provided comprising receiving, via a communication interface of an authorization module comprising a processor, a part file with instructions to manufacture one or more parts with an additive manufacturing machine; generating a shape signature for the part based on the part file; providing a data store storing one or more stored shape signatures, wherein the one or more stored shape signatures are one of an authorized-to-print stored shape signature and an unauthorized-to-print stored shape signature; determining the generated shape signature of the part corresponds to at least one of the authorized-to-print stored shape signatures or at least one of the unauthorized-to-print stored shape signatures; and receiving the determination of whether the generated shape signature of the part corresponds to at least one authorized-to-print stored shape signature or at least one unauthorized-to-print stored shape signature. Numerous other aspects are provided.

Abstract: According to examples, an apparatus may include a controller to identify a property of particulate material contained in a container and to determine, based upon the identified property of the particulate material, a parameter of a supply of gas fed into a conditioning assembly to condition the particulate material contained in the container. The controller may further control a mechanism to supply the gas at the determined parameter into the conditioning assembly.

Abstract: Examples of the present disclosure relate to a three-dimensional printing preparation controller. The controller comprises a processor, a data storage coupled to the processor and an instruction set to cooperate with the processor and the data storage. The instruction set detects a request to mix a first and a second material in a specific proportion, the first and the second material having respectively first and second characteristics; the first characteristics differing from the second characteristics, validates the request by comparing the specific proportion and the first and second characteristics with validated proportions and validated characteristics and mixes the first and second materials in the specific proportion if the request is validated to correspond to validated proportions and validated characteristics.

Abstract: A shaping device is configured to shape a three-dimensional shaped object. The shaping device includes a measuring unit and a correcting unit. The measuring unit is configured to measure a shape of a shaping layer. The correcting unit is configured to correct operation of shaping a shaping layer, according to a first correction amount based on a measurement result of the measuring unit and a second correction amount in accordance with a past correction.

Abstract: A method for producing a three-dimensional shaped article includes acquiring first shape data for indicating a shape of the three-dimensional shaped article, and identification information for identifying the three-dimensional shaped article, generating second shape data for indicating the shape of the three-dimensional shaped article representing the identification information by an arrangement of layers having different characteristics using the first shape data and the identification information, producing the three-dimensional shaped article according to the second shape data, and transmitting the identification information and production information of the three-dimensional shaped article to a server.

Abstract: A customised orthopaedic implant is provided, the implant being formed of metal, the implant being substantially comprised of a lattice-type geometry that has a periodic arrangement and is conformal to a configuration of a region of bone that was resected to remove bone that is diseased and is optimised to substantially restore a biomechanical function of a bone from which the region of bone was resected on implantation of the customised orthopaedic implant in consideration of the anatomical function and of the properties of a bone type corresponding to the region of bone that was resected, together with patient-specific parameters and anticipated loads to which the implant will be subjected during various typical activities and movements.

Abstract: A pipe device includes a pipe and a connection element. The pipe has a pipe jacket that has an inner surface and an outer surface and forms a flow channel. The connection element forms a through-channel that extends from a connection piece consisting of a first material (M1) and having a first opening to a second opening. The pipe jacket is positioned on the connection piece with a first pipe end consisting of a second material (M2). A bonded connection is formed between the first material (M1) and the second material (M2) in a contact region between the inner surface of the pipe jacket and a peripheral surface of the connection piece.

Abstract: A sealing device for sealing edges of composite fiber components includes a strip feeder to apply a thermoplastic semifinished product to a cut edge of a composite fiber component, and an ultrasonic welding apparatus to thermoplastically or integrally join the thermoplastic semifinished product to the cut edge of the composite fiber component by ultrasonic welding.

Abstract: A system and method for welding thermoplastic components by positioning and moving a heated plate between the components to melt their respective faying surfaces, and as the plate moves, pressing the components together so that the melted faying surfaces bond together as they cool and re-solidify, thereby creating a composite structure. The plate has a heated portion which is positioned between and heated to melt a portion of the first and second faying surfaces. A manipulator mechanism moves the plate along an interface from between the portion to between a series of subsequent portions of the first and second faying surfaces, thereby welding the thermoplastic components along the entire interface to create the composite structure. The heated portion may contact the faying surfaces and melt them through conduction, or may be suspended between them and melt them through radiation and convection.

Abstract: Methods and systems are provided for a housing for a fastener of a vehicle component. In one example, a housing for a fastener includes a central conduit adapted to receive the fastener, and a radial key extending outward from an outer surface of the housing. The radial key is first pressed against a vehicle component in an axial direction of the housing to form a first section of a channel within an interior of the vehicle component, and the key is then rotated against the interior to form an undercut, second section of the channel in a circumferential direction of the housing.

Abstract: The invention relates to an intermediate material (132) for the manufacture of composite components, having a prepreg layer (116) and an interleaving layer (120) made up of at least two sections of thermally joined thermoplastic interleaving material sections (120a, 120b). The invention also relates to a method of manufacture of such an intermediate material.

Abstract: A composite moulding material (10) comprising a fibrous layer (12) and a graphene/graphitic material (14) applied to the fibrous layer (12) at one or more localised regions (R1, R2, R3, R4) over a surface (16) of the fibrous layer (12) characterised in that the graphene/graphitic material (14) is comprised of graphene nanoplates, graphene oxide nanoplates, reduced graphene oxide nanoplates, bilayer graphene nanoplates, bilayer graphene oxide nanoplates, bilayer reduced graphene oxide nanoplates, few-layer graphene nanoplates, few-layer graphene oxide nanoplates, few-layer reduced graphene oxide nanoplates, graphene/graphitic nanoplates of 6 to 14 layers of carbon atoms, graphite flakes with nanoscale dimensions and 40 or less layers of carbon atoms, graphite flakes with nanoscale dimensions and 25 to 30 layers of carbon atoms, graphite flakes with nanoscale dimensions and 25 to 35 layers of carbon atoms, graphite flakes with nanoscale dimensions and 20 to 35 layers of carbon atoms, or graphite flakes with nan

Abstract: The invention relates to a fiber reinforced polymer composite material and a preparation method thereof, wherein the fiber reinforced polymer composite material comprises a polymeric resin matrix in a continuous phase, and chemical fiber fabric and reinforced fibers dispersed in the polymeric resin matrix, and the chemical fiber fabric covers the reinforced fibers so as to avoid exposure of the reinforced fibers to an outside surface of the composite material. The invention reduces or even avoids exposure of the reinforced fibers of the fiber reinforced polymer composite material, and can be used for manufacturing cable bridges, frames of doors, windows and curtain walls, etc. The method for preparing the fiber reinforced polymer composite material of the invention effectively improves the performance of the composite material and also reduces the cost of surface treatment and increases production efficiency.

Abstract: A composite comprises: a reinforcing element (10), an adhesive layer (14) made from an adhesive composition, and an elastomeric body made from an elastomeric matrix comprising an ethylene/alpha-olefin type elastomer and/or a polychloroprene elastomer. The adhesive composition comprises a resin based: on a polyphenol comprising an aromatic ring bearing two hydroxyl functions in the meta position relative to one another, the two positions ortho to one of the hydroxyl functions being unsubstituted; and/or on a monophenol comprising a six-membered aromatic ring bearing a single hydroxyl function, the two ortho positions being unsubstituted, or an ortho position and the para position being unsubstituted, and on a compound comprising an aromatic ring bearing two functions, one of these functions being a hydroxymethyl function and the other being an aldehyde function or a hydroxymethyl function.

Abstract: The technology in accordance with embodiments of the present technology provides a hybrid fiber reinforced material comprising a plurality of conditioned bamboo fibers, a plurality of carbon fibers arranged with the plurality of conditioned bamboo fibers, and a resin matrix encapsulating the arrangement of conditioned bamboo fibers and carbon fibers. The encapsulated arrangement can be formed when heated a first time into a first shape and cooled a first time. The encapsulated arrangement can be reformable into a second shape different than the first shape when heated a second time and cooled a second time.

Abstract: In manufacturing an electrothermal heater mat, there is provided a preform which comprises a laminated stack of dielectric layers which are made of thermoplastic material and include a central layer or group of layers which include(s) reinforcement and first and second outer groups of layers which do not include reinforcement. The preform includes a heater element and the preform has a first configuration. The preform is then heated to a temperature (e.g. 180° C.) between the glass-transition temperature of the thermoplastic material and the melting point of the thermoplastic material, and the heated preform is formed into a second configuration which is different to the first configuration so as to produce the heater mat.

Abstract: A method for forming a composite part involves forming a layup comprising (a) preforms/flat form-factor feedstock, either of which includes a plurality of fibers and a matrix precursor, and (b) a differential-melt polymer. The matrix precursor and the differential-melt polymer differ as to at least one of thermal properties and rheological properties. The layup is subjected to controlled application of heat and pressure to melt the matrix precursor and differential-melt polymer. The polymers are then cooled to form a composite part that displays properties attributable to all the constituents. As a function of a variety of factors, the resulting part can be homogenous or heterogenous, and the properties can be localized or global throughout the part.

Abstract: A method is provided for preparing a composite product, the method comprising: forming a core structure having a plurality of layers, each layer being build by an additive manufacturing process; wherein the core structure has a shell substantially enclosing an internal chamber of the core structure, wherein the shell is fluid-impermeable, and wherein the outer surface of the shell has a predefined shape; introducing a fluid into the chamber of the core structure; arranging the core structure and reinforcement fibers in a mould, wherein the mould is arranged to accommodate the core structure including the reinforcement fibers, and wherein the reinforcement fibers and the outer surface of the shell are arranged in contact with each other; providing the reinforcement fibers and a resin on the outer surface of the shell of the core structure; and solidifying the resin to form the composite product inside the mould at a moulding pressure Pm, while controlling the fluid pressure PF of the fluid in the core structur

Abstract: A fully impregnated fiber-reinforced thermoplastic granule includes a fiber core impregnated with a thermoplastic resin and coated with the resin and subsequently polymerized to form a thermoplastic. The granule is formed in a continuous process including a continuous fiber strand being coated and impregnated with a thermoplastic resin, curing the thermoplastic resin, and cutting the fiber and thermoplastic into granules of a desired length. The continuous process results in a uniform, fully impregnated fiber core in the granule which results in a longer reinforcing fiber for added strength in subsequently produced products formed from the granules.

Abstract: Marine vessels, including combatant (naval) vessels are produced inexpensively without requiring the use of as many skilled personnel as is conventional. The vessel produced has a high strength metal truss structure (both above and below the water line) capable of carrying major hull loads. A number of curved or doubly curved composite (e. g. GRP) panels produced by vacuum assisted resin transfer molding are fastened by bolts, marine adhesives, and/or rivets to the below water line portions of the truss structure where necessary to handle slamming loads and to reduce water resistance and wake. Substantially flat composite pultruded panels are fastened to the truss structure both above the water line, and below the water line where the resistance to slamming loads and reduction of water resistance and wake are not critical. Necessary equipment is installed within the open truss volume before the above-water-line panels are fully installed.

Abstract: A light guide structure (100) has a first main surface (101) and an opposite second main surface (102) and is configured to guide light in the light guide structure via total internal reflections at the first and the second main surfaces. The light guide structure comprises an out-coupling arrangement (120) configured to couple light propagating in the light guide structure out of it through the first and/or the second main surface. The light guide structure comprises two cladding layers (1111, 1112) and a core layer (110) sandwiched between the cladding layers, the core layer comprising a core material and the cladding layers comprising cladding materials, respectively. The core material has its elasticity higher than the elasticities of the cladding materials, and its refractive index for a design wavelength substantially the same as the refractive indices of the cladding materials.