DE202017106128U1 - Iridescent emblems with embossed diffraction foils for vehicles - Google Patents

Abstract

An iridescent vehicle emblem comprising: a translucent polymeric emblem comprising inner and outer surfaces, wherein the emblem is formed of a plurality of parts, wherein at least one of the surfaces is planar or non-planar and includes a diffraction grating, the diffraction grating having a thickness of 250 nm to 1000 nm and a period of 50 nm to 5 microns.

Description

FIELD OF THE INVENTION

The present invention relates generally to iridescent emblems, trim and other exterior surfaces for vehicles, particularly automobile emblems having a jewel-like appearance.

BACKGROUND OF THE INVENTION

Car enthusiasts and owners of luxury and premium vehicles are constantly demanding new aesthetic features that at least partially justify the high cost of such vehicles. Vehicle emblems may be designed to reflect the luxury and premium character of particular vehicle models. For example, certain car models with an emblem with a jewel-like appearance may be more desirable for car lovers and owners.

The direct incorporation of jewels and / or precious metals into a vehicle emblem can in some ways satisfy these needs. These elements can be encased within a translucent emblem for a luxurious look. However, the mere addition of jewels and precious metals to traditional emblems adds significantly to the cost of the emblem, and most, other than the cost-insensitive car lovers, are likely to reject the significantly increased cost of these materials. Additionally, the inclusion of jewels and / or precious metals in a vehicle emblem increases the likelihood that thieves will remove it as a relative opportunity target.

Other approaches to enhancing the aesthetics of vehicle emblems are designed to mimic the appearance of diamonds and jewels within a molded plastic part. For example, it is feasible to make faceted plastic emblems that try to approximate the appearance of actual diamonds and jewels. Unfortunately, the results of these approaches are not promising. In general, such emblems seem to look like fashion jewelry and it could be argued that they detract from the overall aesthetics of a luxury vehicle rather than revalue them.

Accordingly, there is a need for vehicle emblems, trim, and other exterior surfaces (and methods of making same) that have a dazzling or jewel-like appearance without a significant cost increase associated with the upgrade. Additionally, these dazzling vehicle emblems should retain their appearance over the life of a vehicle while exposed to a typical vehicle environment. Furthermore, these emblems should be accessible for low cost manufacturing approaches because of their use in vehicle applications as a final product with an anticipated large volume of manufacture.

BRIEF SUMMARY OF THE INVENTION

In accordance with one aspect of the present invention, a dazzling vehicle emblem is provided that includes a translucent polymeric emblem having a non-planar shape and includes an interior surface and an exterior surface. Further, one of the faces of the emblem is not flat and includes a diffraction grating integral with the emblem, the diffraction grating having a thickness of 250 nm to 1000 nm and a period of 50 nm to 5 μm.

In accordance with another aspect of the present invention, a dazzling vehicle emblem is provided that includes a translucent polymeric emblem having a non-planar shape and includes an inner surface and an outer surface. Further, at least one of the surfaces of the emblem includes a plurality of diffraction gratings integral with the emblem, each having a thickness of 250 nm to 1000 nm and a varying period of 50 nm to 5 μm.

According to another aspect of the present invention there is provided a method of producing a dazzling emblem comprising the steps of: forming a mold having molding surfaces corresponding to the inner and outer surfaces of the emblem; Removing at least one of the molding surfaces to form a diffraction grating molding surface, and forming the emblem with a diffraction grating having a thickness of 250 nm to 1000 nm and a period of 50 nm to 5 μm in the molding surfaces with a polymeric material.

According to another aspect of the present invention, there is provided a dazzling emblem including a translucent polymeric emblem having an inner surface and an outer surface, wherein the emblem is formed of a plurality of parts. Further, one of the surfaces is flat or non-planar and includes a diffraction grating, wherein the diffraction grating has a thickness of 250 nm to 1000 nm and a period of 50 nm to 5 μm.

According to another aspect of the present invention, there is provided a method of producing a dazzling emblem, comprising the steps of: embossing a diffraction grating into a polymer film to form a diffraction film; Positioning the diffraction foil in one Shape; and injecting a translucent polymeric material into the mold over the diffractive sheet to form a vehicle emblem. Further, the diffraction grating has a thickness of 250 nm to 1000 nm and a period of 50 nm to 5 μm.

According to another aspect of the present invention, there is provided a method of producing a dazzling emblem, comprising the steps of: heating a diffraction film positioned in a mold; Applying a vacuum to form the foil against a forming surface; and injecting a translucent polymeric material over the mold surface to form a vehicle emblem. Further, the diffraction film comprises a polymer material and a diffraction grating having a thickness of 250 nm to 1000 nm and a period of 50 nm to 5 μm.

These and other aspects, objects and features of the present invention will be understood and appreciated by those skilled in the art after reading the following specification, claims and appended drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Description of the drawings:

1 FIG. 12 is a front perspective view of a dazzling vehicle emblem attached to the front of a vehicle, according to one aspect of the disclosure; FIG.

2 FIG. 12 is a schematic plan view from top to bottom of a dazzling vehicle emblem according to an aspect of the disclosure; FIG.

2A is a schematic cross-sectional view of the in 2 shown emblem through the line IIA-IIA;

2 B FIG. 12 is an enlarged schematic cross-sectional view of a diffraction grating formed in an inner surface of the in. FIG 2 integrated emblem is integrated;

2C is a schematic cross-sectional view of the in 2 shown emblem through the line IIC-IIC, configured with diffraction films;

2D FIG. 12 is an enlarged schematic cross-sectional view of a diffraction grating formed in an inner surface of the in. FIG 2 integrated emblem is integrated;

3 FIG. 12 is a top-down schematic plan view of a dazzling vehicle emblem with non-planar outer and inner surfaces, according to one aspect of the disclosure; FIG.

3A is a schematic cross-sectional view of the in 3 shown emblem by the line IIIA-IIIA;

3B FIG. 12 is an enlarged, schematic cross-sectional view of a diffraction grating formed into a non-planar inner surface of the in. FIG 3 integrated emblem is integrated; and

3C is a schematic cross-sectional view of the in 3 shown emblem through the line IIIC-IIIC, configured with diffraction films;

3D FIG. 12 is an enlarged schematic cross-sectional view of a diffraction grating formed in an inner surface of the in. FIG 3 integrated emblem is integrated;

4 Fig. 10 is an enlarged schematic cross-sectional view of a diffraction grating having a varying period;

5 Fig. 12 is a schematic representation of an embossing process and apparatus used to emboss diffraction gratings in a polymeric film to form diffractive films;

6 is a schematic representation of an overmolding process for producing a dazzling vehicle emblem, as in 2 - 2D and 3 - 3D shown; and

7 is a schematic representation of a vacuum-assisted overmolding process for producing a dazzling vehicle emblem, as in 2 - 2D and 3 - 3D shown.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

For purposes of this description, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", "inner", "outer" refer to "," Forward of the vehicle "," rearward of the vehicle "and derivatives thereof on the invention in their orientation in FIG 1 , However, the invention may take various alternative orientations unless expressly stated to the contrary. In addition, the specific devices and assemblies illustrated in the accompanying drawings and described in the description below are merely exemplary embodiments of the inventive concepts defined in the appended claims. Accordingly, specific dimensions and other physical properties associated with the embodiments disclosed herein are not to be considered as limiting unless the claims expressly state otherwise.

In this disclosure, dazzling emblems, trim, and other exterior surfaces (collectively, "dazzling vehicle elements") for vehicles (and methods of making same) are described. The dazzling vehicle elements include one or more diffraction gratings that are integral with the major component (s) of the elements (eg, an emblem component), each providing sheen and iridescence to the element. Alternatively, the diffraction gratings are part of the foils which are bonded, glued or otherwise integrated into the emblem component or a comparable main element. Various microscopic features can be added or adjusted within the grids to achieve different aesthetic effects. The grids may also be integrated into different areas within the vehicle element to achieve other different aesthetic effects. These grids can also be embossed in foils, which are later integrated into the emblem component. Further, these dazzling emblems, trim or other dazzling vehicle elements may be injection molded as a single part and typically cost only slightly more than conventional emblems and trim. In addition, these emblems, cowls or other related vehicle elements may be formed from two or more parts (eg, an emblem member and a diffractive foil), with or without vacuum assist, by overmolding, at processing costs that are only slightly higher than the processing costs of conventional ones Emblems and disguise.

Referring to 1 is a front perspective view of a dazzling vehicle emblem 100 . 100a At the front of a vehicle 1 is provided in accordance with an aspect of the disclosure. As shown, the emblem is 100 . 100a characterized by a dazzling or jewel-like appearance in ambient lighting (eg from the sun). One or more diffraction gratings 20 (please refer 2 and 3 ) configured within or as part of a film that has an outer and / or inner surface of the emblem 100 . 100a contains, provide the dazzling or jewel-like appearance.

As in 2 shown can be a dazzling vehicle emblem 100 a translucent polymeric emblem component 10 include. The emblem component 10 includes one or more external surfaces 12 and one or more inner surfaces 14 , In some aspects, the emblem component is 10 characterized by an optical transmissivity of 85% or more over the visible spectrum (eg, 390 to 700 nm). The emblem component is preferred 10 characterized by an optical transmissivity of 90% or more, and more preferably 95% or more, over the visible spectrum. Furthermore, the emblem component 10 be visually clear without a significant coloration. In other embodiments, the emblem component 10 tinted (eg, with one or more colors, smoke-like effects or other tints or intentional inconsistencies) and / or with one or more filters on its outer surface 12 and / or inner surface 14 be attached to a desired color (eg blue, red, green, etc.) to obtain.

Referring again to 2 is the emblem component 10 the dazzling vehicle emblem 100 made of a polymer material. These polymeric materials may include thermoplastic or thermosetting polymeric materials, e.g. As silicones, acrylics and polycarbonates. In some embodiments, the precursor material (s) used to fabricate the emblem component 10 are used, so that they have a high flow rate and / or a low viscosity during a molding operation, such as injection molding. In other embodiments, the precursor material (s) used to fabricate the emblem component 10 selected with a higher viscosity, due to cost and other considerations when using a less viscous-dependent process, such as overmolding. In certain aspects, fillers (not shown), e.g. Glass beads and particles are added to a polymer material serving as a matrix to the emblem component 10 without significantly impairing the optical properties of the component. These fillers can be the dazzling vehicle emblem 100 provide increased durability and / or additional aesthetic effects. Preferably, the glass fillers are added in the range of 1 to 15 vol.%, Depending on the type of filler and the desired effect (eg, improved durability, increased light scattering, etc.).

The emblem component 10 the dazzling vehicle emblem 100 can take any of a variety of forms, depending on the type of emblem, vehicle insignia, or other design considerations. For example, in some embodiments, one or more of the outer and inner surfaces are 12 . 14 of the emblem component 10 flat (eg faceted), not flat, curved or marked by other shapes. As those skilled in the art will also appreciate, the outer and inner surfaces may be 12 . 14 with sections having planar features and sections having non-planar features. As in 2 and 2A shown has the emblem component 10 for example, a flat (eg faceted) outer and inner surface 12 . 14 on, which when viewed in cross-section diffraction grating 20 include while there are some curved sections exhibits to the overall design of the vehicle emblem 100 train.

Further referring to 2 can the emblem component 10 the dazzling vehicle emblem 100 in a preferred embodiment, consist of a single component. For example, the emblem component 10 as a single piece with integral diffraction grating (s) 20 be formed of a single shape. In other aspects, the component may 10 be formed of several parts, preferably with connected parts, without significantly affecting the optical properties of the component 10 , In some of these embodiments, the vehicle emblem includes 100 For example, an emblem component 10 and one or more diffraction foil (s) 13 and 15 (please refer 2C . 2D ).

Referring to 2A include the outer and inner surfaces 12 . 14 of the emblem component 10 the dazzling vehicle emblem 100 one or more diffraction gratings 20 , preferably integral with the emblem component 10 , As exemplified in 2A is shown, includes the dazzling vehicle emblem 100 an emblem component 10 with outside and inside surface diffraction gratings 22 . 24 on flat sections of the outer or inner surface 12 . 14 , Some aspects of the vehicle emblem 100 include an emblem component 10 with one or more diffraction gratings 20 in the form of external surface gratings 22 on one or more flat sections of the outer surface 12 , Other aspects of the vehicle emblem 100 include an emblem component 10 with one or more diffraction gratings 20 in the form of inner surface lattices 24 on one or more flat sections of the inner surface 14 ,

In addition, as in 2C shown, the outer and inner surface can be 12 . 14 of the emblem component 10 the dazzling vehicle emblem 100 one or more diffraction films 13 . 15 each of which includes one or more diffraction gratings 20 contains. The diffraction films 13 . 15 may be in the form of a layer, metal foil, foil, or similar structure that is bonded or otherwise made integral with the emblem component 10 to be. In addition, the diffraction films can 13 . 15 between about 0.1 mm and about 1 cm thick. Preferably, the diffraction films 13 . 15 between about 0.1 mm and 5 mm thick. As well as in 2C is shown, the diffraction films 13 . 15 respective outer and inner surface diffraction gratings 22 . 24 include, located on flat portions of the outer or inner surface 12 . 14 are located. In some implementations, the emblem component contains 10 only one diffraction film, either the outer diffraction film 13 or the inner diffraction foil 15 ,

As schematically in 2 B and 2D shown in cross-section, the diffraction gratings 20 of the emblem component 10 a dazzling vehicle emblem 100 (please refer 2 ) are formed at a microscopic level. In one embodiment, the diffraction gratings 20 (ie including the outer and inner surface diffraction gratings 22 . 24 ) a thickness 38 which ranges from 250 nm to 1000 nm. The fat 38 the diffraction grating 20 for example, should be maintained within the range of 250 to 1000 nm to ensure that the dazzling vehicle emblem 100 (please refer 2 and 2A ) has a jewel-like appearance by light diffraction when illuminated in direct ambient lighting, while also having a minimal effect on the optical clarity of the emblem 100 under indirect ambient lighting. Preferably, the thickness is sufficient 38 the diffraction grating 20 from about 390 nm to 700 nm. In other embodiments, the thickness is sufficient 38 the diffraction grating 20 from 500 nm to 750 nm. In other embodiments, crushed reflective crystals (eg, crushed silicate glass powder) also become the diffraction gratings 20 added to the jewel-like appearance of the grid 20 to upgrade or otherwise modify. Preferably, the crushed reflective crystals become the diffraction gratings 20 added when these in the diffraction films 13 and or 15 (please refer 2C and 2D ) to get integrated.

As also schematically in 2 B and 2D As shown, the grooves of the diffraction gratings 20 inside the emblem component 10 a dazzling vehicle emblem 100 be configured in various forms to break incident light and create a dazzling and jewel-like appearance. As in 2 B and 2D shown in exemplary form, have the grids 20 a sawtooth or triangular shape. In three dimensions, these grids can 20 with a step or sawtooth shape without angular features (ie in the direction normal to the illustration in FIG 2 B and 2D ), pyramidal or in a combination of step and pyramid forms. Other forms of diffraction gratings 20 include hill-shaped features (not shown) - e.g. B. graded features with one or more curved feature (s). The diffraction gratings 20 may also include sections with a combination of triangular and hill-shaped features. More generally, the shapes of the lattice 20 be such that an effective blaze angle θ _B of at least 15 degrees for one or more sections of each grating, tooth or groove of the diffraction gratings 20 is available. The blaze angle θ _B is the angle between the step normal (ie the direction normal to each step or tooth of the grid 20 ) and directional normals 40 to the outside and inside surface 12 . 14 with the grid 20 ,

In general, the blaze angle θ _B is optimized to maximize the efficiency of the incident light wavelength (s), typically ambient sunlight, to ensure that the maximum optical power is concentrated in one or more diffraction orders, while the remaining power is concentrated in others Orders (eg, the zeroth order indicating the ambient light itself) is minimized. An advantage of housing the outer and inner surface diffraction gratings 22 . 24 (please refer 2A and 2C ) on flat portions or aspects of the outer and inner surfaces 12 . 14 (as exemplified in FIG 2A and 2C for a diffraction grating 24 on a flat section of an inner surface 14 shown) is that a constant blaze angle θ _B and a constant period 36 to a continuously reflected and diffracted light, which is generated by the diffraction grating leads. Such constancy can be achieved by a designer of the dazzling vehicle emblem 100 (please refer 2 ) are used to ensure that certain jewel-like effects of people in different locations and at different distances from the emblem 100 can be observed.

As also schematically in 2 B and 2D shown are the diffraction gratings 20 of the emblem component 10 a dazzling vehicle emblem 100 by one or more periods 36 (known as d in the standard nomenclature for diffraction gratings). In some aspects of the vehicle emblem 100 (please refer 2 ) becomes the period 36 of the diffraction grating 20 maintained between about 50 nm and about 5 microns.

In general, the maximum wavelength corresponds to a given diffraction grating 20 can bend, twice the period 36 , Thus, a diffraction grating 20 with a period 36 , which is maintained between about 50 nm and about 5 μm, diffract light in an optical range of 100 nm to about 10 μm. In a preferred embodiment, the period becomes 36 a diffraction grating 20 from about 150 nm to about 400 nm, which ensures that the diffraction grating 20 Light in an optical range of about 300 nm to about 800 nm, which covers the visible spectrum coarse, can efficiently diffract.

Referring again to 2 B and 2D is an inside surface diffraction grating 24 along a section of an inner surface 14 an emblem component 10 shown in exemplary form. At a angle of incidence α incident light 50 (typically ambient sunlight) becomes a sawtooth diffraction grating 24 with a thickness 38 , a period 36 and a blaze angle θ _B. More precise is a section of the incoming light 50 (preferably a small section) pointing to the diffraction grating 24 at an incident angle α, as reflected light 50 _r at the same angle α, and the remaining portion of the incident light 50 is using certain wavelengths, the diffracted light 60 _n , 60 _n-1 , etc., diffracted at respective diffraction angles β _n , β _{n + 1} , etc. The reflected light 50 _r indicates the zeroth order (ie, n = 0) and the diffracted light according to the standard diffraction grating terminology 60 _n , 60 _{n + 1} , etc. indicates the n-th order diffraction, where n is an integer corresponding to the particular wavelengths of the reflected or diffracted light.

The inner surface grid 24 as in an enlarged schematic format in 2 B and 2D shown are due to their sheltered location advantageous within the dazzling Fahrzeugemblems 100 (please refer 2 . 2A and 2C ). In particular, these grids 24 generally from damage, alteration and / or wear due to their location on the back of the badge component 10 protected. Provided that the incident light 50 the component 10 must happen to the grid 24 to reach, and that the diffracted light 60 _n , 60 _n-1 etc. also the component 10 must happen to produce a dazzling effect, the diffraction efficiency of the grid 24 due to light absorption within the component 10 be slightly less than the diffraction efficiency of the outer surface grid 22 (please refer 2A and 2C ). On the other hand, the outer surface gratings 22 if they are inside the outer surface 12 of the component 10 are more susceptible to damage, alteration and / or wear than the inner surface grids 24 , Accordingly, a preferred embodiment of the vehicle emblem includes 100 both outer and inner surface diffraction gratings 22 . 24 to compensate for diffraction efficiency and wear resistance.

Referring to 3 - 3D is a dazzling vehicle emblem 100a , which is a translucent polymeric emblem component 10a with a non-planar outer and inner surface 12a . 14a includes, according to one aspect of the disclosure illustrated. This in 3 . 3A and 3C shown dazzling vehicle emblem 100a is similar to the dazzling vehicle emblem 100 , this in 2 . 2A and 2C is shown, and like designated components have the same structure and the same function. The main difference between the emblems 100a and the emblems 100 is that the former is an emblem component 10a with non-planar sections of the inner and outer surfaces 12a . 14a (or such areas 12a . 14a which are substantially non-flat over their entire area) and diffraction gratings 20a on such non-planar features (or within the diffraction films 13a and or 15a , as in 3C shown) exhibit. In contrast, the emblems point 100 an emblem component 10 with diffraction gratings 20 on, resting on even sections of the outside and inside surfaces 12 . 14 (or within the diffraction grating 13 and or 15 , as in 2C is shown). By housing the diffraction gratings 20a on non-planar sections of the inner and outer surfaces 12a . 14a can have certain jewel-like and dazzling effects on the emblems 100a obtained from those at the emblems 100 differ. Otherwise have the dazzling vehicle emblems 100 and 100a however, the same structure and the same function.

Referring to 3A includes the dazzling vehicle emblem 100a an emblem component 10a with one or more diffraction gratings 20a , Furthermore, the diffraction gratings 20a Outside and inside surface diffraction grating 22a respectively. 24a which may be internal or otherwise on non-planar sections of the exterior and interior surfaces 12a . 14a of the component 10a are located. Some aspects of the vehicle emblem 100a include an emblem component 10a with one or more diffraction gratings 20a in the form of external surface gratings 22a on one or more non-planar sections of the outer surface 12a , Other aspects of the vehicle emblem 100a include an emblem component 10a with one or more diffraction gratings 20a in the form of inner surface lattices 24a on one or more non-planar sections of the inner surface 14a ,

In addition, as in 3C shown, the outer and inner surface can be 12a . 14a of the emblem component 10a the dazzling vehicle emblem 100a one or more diffraction films 13a . 15a each of which includes one or more diffraction gratings 20a contains. The diffraction films 13a . 15a may be in the form of a layer, metal foil, foil, or similar structure that is bonded or otherwise made integral with the emblem component 10a to be. In addition, the diffraction films can 13a . 15a between about 0.1 mm and about 1 cm thick. Preferably, the diffraction films 13a . 15a between about 0.1 mm and 5 mm thick. As well as in 3C is shown, the diffraction films 13a . 15a respective outer and inner surface diffraction gratings 22a . 24a include, on non-planar portions of the outer and inner surfaces 12a . 14a are located. In some implementations, the emblem component contains 10a only one diffraction film, either the outer diffraction film 13a or the inner diffraction foil 15a ,

Referring now to 3B and 3D is the cross-sectional view of the diffraction gratings 20a inside the emblem component 10a a dazzling vehicle emblem 100a similar to the cross-sectional view of the diffraction gratings 20 in 2 B and 2D , In 3B and 3D becomes a light incident at an angle of incidence α 50 (typically ambient sunlight) against a sawtooth diffraction grating 24 with a thickness 38 , a period 36 and a blaze angle OB (some elements are in 3B and 3C not specifically shown, but see 2 B and 2D ). More precise is a section of the incoming light 50 (preferably a small section) pointing to the diffraction grating 24a at an incident angle α, as reflected light 50 _{r is} reflected at the same angle α (some elements are in 3B and 3C not specifically shown, but see 2 B and 2D ), and the remaining portion of the incident light 50 is using certain wavelengths, the diffracted light 60 _n , 60 _n-1 , etc., are diffracted at respective diffraction angles β _n , β _{n + 1} , etc. (see 2 B and 2D ) and so on. The reflected light 50 _r (see 2 B and 2D ) indicates the zeroth order (ie n = 0) and the diffracted light according to the standard diffraction grating terminology 60 _n , 60 _n-1 , etc. indicates the n-th order diffraction, where n is an integer corresponding to the particular wavelengths of the reflected or diffracted light. Provided the inner surface 14a is in the in 3B and 3D shown emblem 10a not just, the incident light hits 50 each tooth at a slightly different angle, even if the blaze angle θ _B (in 3B and 3D not shown, but see 2 B and 2D ) and the period 36 kept constant. The result is that every tooth of the diffraction grating 20a can produce diffracted light with a unique or different diffraction order. Such as in 3B and 3D a tooth of the diffraction grating can be diffracted light 60 _n and 60 _{n + 1} and another tooth can diffract light 60 _n-2 and 60 _{n + 3} produce, all from the same incident light 50 , Consequently, the inner surface diffraction grating 24a , and more generally the diffraction gratings 20a , beneficial jewel-like effects with widely varying wavelengths within small areas of the emblem 100a (please refer 3 . 3A and 3C ) produce.

It will also be understood that in other embodiments, crushed reflective crystals (eg, crushed silicate glass powder) are present in the diffraction gratings 20a can be added to the jewel-like appearance of the grid 20a upgrade. Preferably, the crushed reflective crystals become the diffraction gratings 20a added while in the diffraction films 13a and or 15a (please refer 3C and 3D ) are integrated or otherwise formed in these.

Referring to 4 is a diffraction grating 120 with varying periods (eg, containing a set of periods), that in the dazzling vehicle emblems 100 . 100a (or other emblems that comply with the principles of the Revelation match), shown in cross-sectional form according to one aspect of the disclosure. The diffraction grating 120 is largely similar to the diffraction gratings 20 . 20a , in the 2 - 2D and 3 - 3D are shown, and like-labeled components have the same structure and the same function. The diffraction grating 120 differs from the diffraction gratings 20 . 20a in that it contains varying periods within the same grid. In particular, the diffraction grating 120 have two or more sets of teeth or grooves each having a certain period (eg period 136a ) that can produce light in unique or different diffraction orders. As exemplified in 4 shown is the grid 120 configured with three periods - period 136a , Period 136b and period 136c , A set of teeth of the diffraction grating 120 with a period of 136a can diffracted light 60 _n and 60 generate _{n + 1} , another set of teeth with a period of 136b can diffracted light 60 _{n + 2} and 60 generate _n-3 , and a third set of teeth with a period of 136c can diffracted light 60 _n-4 and 60 _{n + 5} produce, all from the same incident light 50 , Consequently, the diffraction grating can 120 regardless of whether it's on an inside and / or outside surface 12 . 12a . 14 . 14a (please refer 2A and 3A ) of the component 10 . 10a (please refer 2A . 2C . 3A and 3D ), advantageously jewel-like effects with widely varying wavelengths within different regions of the emblem 100 . 100a (please refer 2A . 2C . 3A and 3C ) containing such a grid.

In some aspects, the diffraction grating includes 120 a varying period that varies between two to ten discrete values or, more preferably, between two to five discrete values. In another aspect, a diffraction grating 120 with varying periods in one or more sections of an inner and / or outer surface 12 . 12a . 14 . 14a an emblem component 10 . 10a are used, and one or more diffraction gratings 20 . 20a with a constant period are in other sections of the outer and / or inner surface of the emblem component 10 . 10a used to create interesting, jewel-like effects created by the vehicle emblem inserting the grille 100 . 100a , to accomplish. In another embodiment, the diffraction grating includes 120 a varying period that alternates between any number of values, limited only by the total length of the grid 120 and / or the processing capabilities to develop such variability by precisely controlling the shape dimensions.

More general about the dazzling vehicle emblems 100 . 100a returning, optional coatings (not shown) may be placed over the exterior surfaces 12 . 12a of the emblem component 10 . 10a be applied. For example, an optically clear sealant layer (eg, a polyurethane seal) may be applied to such exterior surfaces for further mechanical protection and / or protection against ultraviolet light from the emblems 100 . 100a add, in particular to any diffraction gratings 20 . 20a which are included in the outer surfaces of these emblems. Advantageously, the additional, relatively thin protective coating can protect the diffraction gratings, while the advantages of the position of the grid on the outer surface of the emblem with respect to the diffraction efficiency and the emblems 100 . 100a obtained total schillers are preserved.

In another aspect of the dazzling vehicle emblems 100 . 100a Can be an optional mounting plate or mounting layer on the inner surfaces 14 . 14a the emblem components 10 . 10a these emblems are applied. Such a mounting plate or layer may be specular (eg, mirror-like) or non-specular (eg, light-diffusing), depending on the desired aesthetic effect of the emblem 100 . 100a , Likewise, the mounting plate or layer may be white, gray, black, or any perceptible color. For example, an emblem designer could use a red mounting plate to make a reddish iridescent with the emblem 100 . 100a to produce, which is configured on the hood of a blue vehicle having such an emblem.

In accordance with another aspect of the disclosure, there is provided a method of producing a dazzling vehicle emblem (eg, the dazzling vehicle emblems 100 . 100a ) comprising a step of forming a mold having molding surfaces corresponding to the inner and outer surfaces of the emblem (eg, the outer and inner surfaces 12 . 12a . 14 . 14a ) includes. Preferably, the mold for this step is formed of metals or metal alloys sufficient to withstand the injection molding of an emblem component (eg, components 10 . 10a ) and withstand ambient temperatures and conditions. In a preferred embodiment, the step of forming a mold is performed such that the mold is for injection molding a one-piece emblem component 10 . 10a be able to.

The method of producing a dazzling vehicle emblem further includes a step of abrading at least one of the forming surfaces to form one or more diffraction grating forming surfaces. For example, the ablation step is performed to form one or more of such diffraction grating surfaces that correspond to the diffraction gratings (eg, diffraction gratings) 20 . 20a and 120 ) which correspond to sections of the outer and / or inner surface of the emblem (eg emblems 100 . 100a ) should be integrated. In a preferred embodiment, the ablation step is performed by means of a laser ablation process. Laser ablation processes, the z. B. a cutting device AgieCharmilles Laser P by Georg Fischer Ltd. Because of their ability to precisely ablate microscopic features in metal and metal alloy mold surfaces, they are particularly well engineered to develop the diffraction grating molding surfaces in the mold.

Referring again to the method of producing a dazzling vehicle emblem, it also includes a step of forming the emblem (eg, emblems 100 . 100a ) with a diffraction grating (eg diffraction grating 20 . 20a . 120 ) having a thickness of 250 nm to 1000 nm and a period of 50 nm to 5 μm in the molding surfaces with a polymer material (eg, optically clear silicone having a high flow rate). Preferably, the step of forming the emblem is performed by an injection molding process. In a preferred aspect, portions of the mold are heated in the vicinity of the one or more diffraction grating forming surfaces prior to the step of forming the emblem. The addition of additional heat to these portions of the mold serves to further reduce the viscosity of the polymer material so that it can flow within the very small scale aspects of the diffraction grating molding surfaces.

Referring to 5 is an embossing device 150 shown in schematic form, which can be used to diffraction gratings 20 . 20a in a polymer film to emboss the diffraction films 13 . 13a . 15 . 15a train. More specifically, a polymer film 160 as shown on a roll 152 be stored. The polymer film 160 can then through one or more drawing rollers 154 be fed and guided. The drawing rollers 154 can then be used to make the polymer film 160 to stretch and work to remove wrinkles and other macroscopic errors. The resulting stretched polymer film 165 can then, as shown, in a pair of embossing rollers 156 be supplied. The embossing rollers 156 can be made of a metal alloy. One or more of the embossing rollers 156 can be configured to stand against the stretched polymer film 165 to push the diffraction grating 20 . 20a to emboss in the film, creating a polymer film 170 is formed with embossed diffraction gratings. Next is the polymer film 170 containing the diffraction gratings 20 . 20a contains, by one or more draw rolls 154 fed to further stretch the film and remove any further wrinkles or imperfections that may be present in the film, e.g. B. in the embossing step, have trained. In some embodiments, crushed reflective crystals (eg, crushed silicate glass powder) are also added to the film, which now forms the diffraction gratings 20 . 20a Contains the jewel-like appearance of the lattice 20 . 20a to upgrade or otherwise modify. Preferably, the crushed reflective crystals become the diffraction gratings 20 . 20a over the drawing rollers 154 and / or the embossing rollers 156 inflicted during or before the grid 20 . 20a in the stretched polymer film 165 and finally the diffraction films 13 . 13a . 15 . 15a (please refer 2C . 2D . 3C and 3D ) to get integrated.

Finally, the stretched polymer film 170 containing the diffraction gratings 20 . 20a Contains, with the punching device 180 to be parted and placed in a container 190 , as in 5 shown. These split films can be considered the diffraction films 13 . 13a . 15 . 15a serve (see also 2C and 3C ). In some aspects, these diffraction films can be used to create dazzling vehicle emblems 100 . 100a using an overmolding process 200 to manufacture, which is explained below (see 6 ). In other aspects, the polymer film becomes 170 with the embossed diffraction gratings 20 . 20a within the embossing device 150 not cut or cut; instead, a continuous or semi-continuous slide can be used 170 with diffraction gratings 20 . 20a as a foil, e.g. B. foil 313 be guided into a shape to the dazzling vehicle emblems 100 . 100a using a vacuum assisted overmolding process 300 to manufacture, also in the following 7 is explained.

Coming back to the embossing rollers 156 the in 5 illustrated embossing device 150 For example, one or more of these rollers may include a diffraction grating pattern. Preferably, the diffraction grating patterns are etched into the rolls by means of a laser etching process. To the extent that the embossing device 150 one or more embossing rolls 156 without diffraction grating pattern, these rollers, which have no diffraction grating pattern, should be polished to a low surface roughness. More generally, the diffraction grating patterns are those on the embossing rolls 156 are configured, the negative of the particular desired diffraction grating 20 . 20a that in the diffraction films 13 . 13a . 15 and or 15a should be marked. When the stretched polymer film 165 through these rollers 156 is guided, push the diffraction grating patterns against the film to the film with the desired diffraction gratings 20 . 20a to shape or otherwise pass this on.

Referring again to the in 5 illustrated embossing device 150 and its associated stamping operation, this device is merely an exemplary aspect of the disclosure. Other implementations of the disclosure are for variants of the embossing device 150 and their associated stamping process. For example, the embosser 150 several sets of embossing rolls 156 some, or all, of the diffraction grating patterns for embossing the diffraction gratings 20 . 20a in the polymer film 165 may include. As another example, the embossing device may include one or more heating elements to pass through the drawing rollers 154 to assist in the development of strain. Such heating elements (eg, convection heaters, infrared heaters or the like) may be in relatively close proximity to the foil 165 or the foil 170 be arranged when passing through the drawing rollers 154 happens. In addition, some embodiments of the embossing device 150 embossing rollers 156 include, for. B. by means of a controller (not shown) for movement and adjustment are able to the position and / or the structure in connection with the diffraction gratings 20 . 20a while changing these into the stretched polymer film 165 be shaped. More specifically, adjustable embossing rollers 156 be moved to change the pressure and / or the relative position of the diffraction grating patterns, while they are used to the stretched polymer film 170 to shape. In this way you can create unique diffraction gratings 20 . 20a in the stretched polymer film 170 be passed on and finally in the diffraction films 13 . 13a . 15 . 15a be formed.

Referring to 6 is an extrusion coating process 200 for producing a dazzling vehicle emblem 100 . 100a , as in 2 - 2D and 3 - 3D shown, shown in schematic form. In step 240 becomes a diffraction film 13 . 13a . 15 . 15a (please refer 2C and 3C ), which has one or more diffraction gratings 20 . 20a contains, within two halves 222 . 224 a shape positioned. As noted previously, the diffraction films can 13 . 13a . 15 . 15a with an embossing device 150 be formed as previously in 5 described and illustrated. In step 245 the overmolding process 200 become the halves 222 . 224 the shape above the diffraction foil 13 . 13a . 15 . 15a , as shown, closed. At this point, step becomes 250 of the process 200 initiated, the injection of a polymer material 210 , preferably a translucent polymer material, in the closed mold halves 222 . 224 as shown. In some embodiments, the polymeric material is 210 a silicone, acrylic, polycarbonate or a combination of these materials. Furthermore, the polymer material 210 in some aspects, the same or a similar composition as the polymeric material used in the diffraction film 13 . 13a . 15 . 15a is used on. Preferably, the polymer material becomes 210 during and before the initiation of step 250 heated and in the mold halves 222 . 224 injected under pressure above ambient pressure. Optionally, the mold halves 222 . 224 during or before the initiation of step 250 heated. During the step 250 the polymer material flows 210 over the diffraction foil 13 . 13a . 15 . 15a to the emblem component 10 . 10a train.

At this point of the in 6 shown Umspritzvorgangs 200 become the mold halves 222 . 224 containing the polymer material 210 and the diffraction foil 13 . 13a . 15 . 15a surrounded, now while step 255 cooled. After cooling, the mold halves 222 . 224 opened and the resulting iridescent emblem 100 . 100a (please refer 2 - 2D and 3 - 3D ) will be in step 260 removed from the mold (eg by means of a manual or mechanical action, such as a robotic arm with a suction device). As in further 6 in step 260 shown contains the resulting dazzling vehicle emblem 100 . 100a an emblem component 10 . 10a and one or more diffraction films 13 . 13a . 15 . 15a with one or more diffraction gratings 20 . 20a ,

Referring again to the in 6 illustrated extrusion process 200 For example, as explained above, this process is merely an exemplary aspect of the disclosure. Other implementations of the disclosure are for variants of the overmolding process 200 directed. For example, the overmolding process 200 be done so that the diffraction film 13 . 13a . 15 . 15a positioned on one or both of the surfaces that are in contact with the mold halves 222 . 224 during the step 240 keep in touch. Furthermore, the mold halves 222 . 224 be configured so that one or both can be used to polymer material 210 in a cavity between the mold halves 222 . 224 during the step 250 inject. This allows different configurations of dazzling vehicle emblems 100 . 100a with diffraction gratings 20 . 20a on one or both of the outside and inside surfaces 12 . 12a . 24 . 24a (please refer 2A . 2C . 3A and 3C ) with one or more variants of the encapsulation process 200 be created.

Referring to 7 is a vacuum assisted overmolding process 300 for producing a dazzling vehicle emblem 100 . 100a , as in 2 - 2D and 3 - 3D shown, shown in schematic form. In step 340 becomes a continuous or semi-continuous film 313 in two mold halves 322 . 324 with a variety of rollers 302 , Brackets or the like as shown. The foil 313 includes one or more diffraction gratings 20 . 20a , In some embodiments, the film is 313 similar in structure to the continuous or semi-continuous film 170 holding a set of embossed diffraction gratings 20 . 20a includes, as by the embossing device 150 is prepared previously in 5 explained and illustrated. As in step 340 shown is a dazzling badge assembly 399 in a state as formed, in contact with the mold half 322 represented. Referring now to step 345 becomes a holder 320 adjacent to the badge assembly 399 and the foil 313 positioned. In some embodiments of the process 300 can the holder 320 during step 345 begin to heat on the foil 313 applied. In addition, the rollers can 302 and / or the holder 320 a section of the slide 313 Divide so that the remaining film 313 in the mold halves 322 . 324 fits.

At this point of the in 7 illustrated vacuum assisted overmolding process 300 the process continues to step 350 , At step 350 can the holder 320 the badge assembly 399 (eg, as before in a manufacturing process, the process 300 used, by suction, a temporary adhesive or other device used to temporarily secure the assembly 399 is configured. Also in step 350 drives the holder 320 So, keep heat on the slide 313 to apply, for. With a temperature and time with regard to the composition of the film 313 so that it can easily undergo plastic deformation. In addition, the mold half 324 begin to apply a vacuum force, suction or the like to the film 313 , z. B. through holes (not shown) in the mold half, apply. The process continues to step 355 in which the vacuum force continues to slide against the film 313 acts, so that the film against the molding surface 324a deformed, whereby it adapts to their surface. Also in step 355 remove the holder 320 the badge assembly 399 from the mold half 322 and up away from the two halves 322 . 324 , It should be noted that by step 355 obtained emblem assembly 399 by trimming (not shown), like in steps 365 and 370 illustrated action (which will be described in more detail below) in an emblem assembly 100 . 100a can be converted.

Referring again to 7 is the vacuum-assisted extrusion process 300 continue to step 360 , In this step, a polymer material 310 , preferably a translucent polymer material, through the mold half 324 over the molding surface 324a in the closed mold halves 322 . 324 , as shown, injected. In some embodiments, the polymeric material is 310 a silicone, acrylic, polycarbonate or a combination of these materials. Furthermore, the polymer material 310 in some aspects, the same or similar composition as the polymer material used in the film 313 containing the diffraction gratings 20 . 20a contains, is used on. Preferably, the polymer material becomes 310 during and before the initiation of step 360 heated and in the mold halves 322 . 324 injected under pressure above ambient pressure. Optionally, the mold halves 322 . 324 during or before the initiation of step 360 heated. During step 360 the polymer material flows 310 over the molding surface 324a and the foil 313 containing the diffraction gratings 20 . 20a to form a badge assembly (later in step 365 as a badge assembly 399 Are defined).

At this point of the in 7 illustrated vacuum assisted overmolding process 300 , to the end of the step 360 , the mold halves become 322 . 324 containing the polymer material 310 and the foil 313 containing the diffraction gratings 20 . 20a contains, surrounded, cooled. After cooling, the mold halves 322 . 324 opened and the resulting badge assembly 399 will be during step 365 removed from the mold (eg by means of a manual or mechanical action, such as a robotic arm with a suction device). Further, in step 365 remaining portions of the film 313 from the badge assembly 399 removed by elements 389 , as shown, are cut off, creating the dazzling emblem 100 . 100a (see also 2 - 2D and 3 - 3D ) is formed. Like also in 7 shown contains the resulting dazzling vehicle emblem 100 . 100a an emblem component 10 . 10a and one or more diffraction films 13 . 13a . 15 . 15a with one or more diffraction gratings 20 . 20a ,

Referring again to the in 7 illustrated vacuum assisted overmolding process 300 this process is merely an exemplary aspect of the disclosure. Other implementations of the disclosure are for variants of the overmolding process 300 directed. For example, variants of the operation 300 on a device or manual actions other than those previously associated with the holder 320 revealed build to the badge assemblies 399 to remove. It is also obvious that the vacuum assisted overmolding process 300 be carried out so that the continuous or semi-continuous film 313 For example, one or both of the surfaces may be positioned with the mold halves 322 . 324 during the step 340 keep in touch. Furthermore, the mold halves 322 . 324 be configured so that one or both can be used to polymer material 310 in a cavity between the mold halves 322 . 324 during the step 360 inject. Similarly, one or both of the mold halves 322 . 324 be configured with holes, ports or the like, along with an optional heater, so that a vacuum or vacuum and / or heat during the steps 350 and 355 on the slide 313 can be applied to the film 313 to deform and attach them to the surfaces of these mold halves 322 . 324 adapt. This allows different configurations of dazzling vehicle emblems 100 . 100a with diffraction gratings 20 . 20a on one or both of the outside and inside surfaces 12 . 12a . 24 . 24a (please refer 2A . 2C . 3A and 3C ) using one or more variants of the vacuum assisted overmolding process 300 of Revelation.

In addition, the injection molding process 200 (eg as in 6 shown) or the vacuum-assisted overmolding process 300 (eg as in 7 shown) in combination with the use of an embossing device 150 and their associated embossing process (see 5 ) each have many advantages and benefits. For example, the costs associated with generating each of the dazzling vehicle emblems 100 . 100a with the overmolding 200 . 300 less than the cost associated with an injection molding approach. A major difference is that the investment costs for etching, engraving or otherwise providing diffraction patterns in an injection mold are higher compared to the diffraction patterns in embossing rolls. Additionally, injection molding often requires the use of lower viscosity polymer materials to ensure proper flow within the diffraction patterns in the mold. Conversely, the overmolding processes 200 . 300 no such challenges, since the diffraction gratings are preferably embossed in a film and the film is substantially adhered to the emblem component or integrated in the Umspritzvorgangs. Since overmolding does not have the technical challenge of ensuring polymer flow into a diffraction grating by means of viscosity and temperature control, among other factors, its yield is likely to be higher than in connection with an injection molding operation. This difference in yield also leads to lower production costs in connection with the overmolding processes 200 . 300 ,

In other aspects of the disclosure, the concepts of the above dazzling vehicle emblems may be used 100 . 100a be applied to other dazzling vehicle elements. These elements include, for example, exterior and interior vehicle trim features and elements, license plate mounts, hubcaps, keycaps, and other features that could benefit from dazzling effects of ambient lighting appearance. It is also feasible to use molds for creating such dazzling vehicle elements that can produce unique or almost unique jewel-like effects of appearance. For example, a dazzling vehicle emblem 100 . 100a for a mold with a fully symmetrical emblem component having one or more symmetrically positioned diffraction gratings that diffract light differently in each direction. Once a given emblem is created, random alignment associated with a manual or robotic installation on a vehicle can create a unique or nearly unique jewel-like appearance.

In another aspect, the dazzling vehicle emblems 100 . 100a with diffraction gratings 20 . 20a be configured to create a dazzling appearance with ambient lighting during the day, while compensating for the reduction of glare and glare for oncoming drivers during daytime or nighttime conditions. In particular, the diffraction gratings can 20 . 20a within certain locations on the exterior and / or interior surfaces 12 . 12a . 14 . 14a be accommodated to produce the desired jewel-like appearance, but only when viewers are in positions that are not typical of oncoming vehicles.

Variations and modifications may be made to the above structure without departing from the concepts of the present invention. Such variations and modifications and other embodiments which, within the understanding of one skilled in the art, are within the scope of the disclosure are intended to be covered by the following claims, unless expressly further expressing those claims by language.

Claims (8)

Iridescent vehicle emblem, comprising: a translucent polymeric emblem comprising inner and outer surfaces, the emblem being formed of a plurality of parts, wherein at least one of the surfaces is flat or non-planar and comprises a diffraction grating, wherein the diffraction grating has a thickness of 250 nm to 1000 nm and a period of 50 nm to 5 μm. The emblem of claim 1, wherein the plurality of pieces comprises an emblem member and a diffraction sheet. The emblem of claim 2, wherein the inner surface comprises a first diffraction film and the outer surface comprises a second diffraction film, each diffraction film comprising a plurality of diffraction gratings. The emblem of claim 2, wherein the inner surface comprises the diffraction film. The emblem of claim 2, wherein the outer surface comprises the diffraction film. The emblem of claim 2, wherein the diffraction sheet further comprises comminuted reflective crystals. The emblem of claim 2, wherein the polymeric emblem is tinted. The emblem according to claim 2, wherein the diffraction film is formed by embossing, and the emblem member and the diffraction film are connected by overmolding.

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