CN111175859B - 2-color formed lens - Google Patents
2-color formed lens Download PDFInfo
- Publication number
- CN111175859B CN111175859B CN201910987985.4A CN201910987985A CN111175859B CN 111175859 B CN111175859 B CN 111175859B CN 201910987985 A CN201910987985 A CN 201910987985A CN 111175859 B CN111175859 B CN 111175859B
- Authority
- CN
- China
- Prior art keywords
- lens
- molded article
- color
- primary molded
- primary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
-
- 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
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a 2-color formed lens. The problem is to effectively inhibit poor appearance in a 2-color formed lens with an anti-fog coating film formed on the inner surface. A covering part (10Sb) is formed by extending from a joint surface (10b1) with a primary molded article (10P) along an inner surface (10Pa1) of a thick part (10Pa) of the primary molded article so as to cover the primary molded article at a body side run-in portion (10Sa) of a secondary molded article (10S) formed by running from a lens peripheral wall part (14) to a lens body part (12) along an inner surface (10b) of the primary molded article along the inner surface (10b1) of the 2-color molded lens (10) and preventing a groove-like gap from being formed at a corner part (10Pb) of the primary molded article. Even if it takes a certain time or more before the completion of curing after the anti-fog coating film (24) is formed on the inner surface (10b) of the lens, the occurrence of cracks around the corner of the primary molded article can be effectively suppressed.
Description
Technical Field
The present invention relates to a 2-color molded lens having an antifogging coating film formed on the inner surface thereof.
Background
Conventionally, a 2-color molded lens including a primary molded article made of a transparent resin and a secondary molded article made of an opaque resin has been known.
As described in patent document 1, a 2-color molded lens used as a vehicle lamp generally includes a lens body and a lens peripheral wall portion rising from a peripheral edge portion thereof toward an inner surface side of the 2-color molded lens.
In such a 2-color molded lens, the primary molded article is formed by winding from the lens body portion to the lens peripheral wall portion along the outer surface of the 2-color molded lens, and the secondary molded article is formed by winding from the lens peripheral wall portion to the lens body portion along the inner surface of the 2-color molded lens.
In addition, conventionally, in a headlamp lens of a vehicle lamp, the following structure is often adopted: a hard coating film is formed on the outer surface thereof, and an antifogging coating film is formed on the inner surface thereof.
As described in patent document 2, for example, in these film forming operations, a synthetic resin composition in a coating material is cured by ultraviolet irradiation after a hard coating film is formed on the outer surface of a lens, and then an antifogging coating film is formed on the inner surface of the lens, and then the antifogging coating film is cured by heat, so that such 2 independent steps (hereinafter referred to as "independent film forming step") are generally performed.
[ patent document 1 ] Japanese patent laid-open No. 2014-176974
[ patent document 2 ] Japanese patent laid-open No. 2000-182409
When a 2-color molded lens is configured such that a hard coating film is formed on the outer surface thereof and an antifogging coating film is formed on the inner surface thereof, the film forming step is a step (hereinafter referred to as "mixed type film forming step") of forming an antifogging coating film on the inner surface thereof after forming a hard coating film on the outer surface of the 2-color molded lens, curing the hard coating film by ultraviolet irradiation, and then curing the antifogging coating film by heat, instead of the conventional independent type film forming step, whereby labor saving in the film forming step can be achieved, and thus, the work efficiency in the manufacturing step of the 2-color molded lens can be improved.
However, when such a hybrid film-forming process is employed, the following problems arise:
that is, in the 2-color molded lens, the molding of the secondary molded article is performed after the molding of the primary molded article, and therefore, in the primary molded article, the inner surface and the corner portion of the joint surface with respect to the secondary molded article inevitably form a rounded corner R, which cannot be formed with a pin corner (i.e., R0). In this case, in normal die machining, the minimum round R has a size of about r0.3mm in the structure of the end mill.
Therefore, in the 2-color molded lens, a groove-like gap having a substantially wedge-like cross-sectional shape is formed along the corner portion of the primary molded article.
In this case, in the case of using the hybrid type film forming process, since the antifogging coating film is cured after the hard coating film is cured by the ultraviolet irradiation, the antifogging coating material accumulated in the groove-like gap formed at the corner of the primary molded article in the 2-color molded lens penetrates into the primary molded article during this period, and thus cracks are likely to occur around the corner of the primary molded article.
In particular, when a secondary molded article is molded, the primary molded article in a state of being arranged in the mold is subjected to a pressing force by the molten resin injected into the mold, and therefore, a residual stress is generated in the periphery of the corner portion of the primary molded article in the 2-color molded lens after the molding is completed, and therefore, cracks are more likely to be generated.
Further, if cracks are generated around the corners of the primary molded article in this manner, the cracks are visible through the transparent lens body, and therefore, appearance defects occur in the 2-color molded lens.
Even if a separate film forming step is employed or a hard coat film is not formed on the outer surface of the 2-color formed lens structure, there is a possibility that a problem may occur when a certain time or more is spent after the antifogging coating film is formed on the inner surface of the lens until the completion of curing.
Disclosure of Invention
The present invention has been made in view of such circumstances, and an object thereof is to provide a 2-color molded lens having an antifogging coating film formed on an inner surface thereof, which can effectively suppress occurrence of appearance defects in the 2-color molded lens.
The present invention achieves the above object by improving the structure of a secondary molded article.
That is, the 2-color molded lens according to the present invention is a 2-color molded lens comprising a primary molded article made of a transparent resin and a secondary molded article made of an opaque resin, and including a lens body and a lens peripheral wall portion rising from a peripheral edge portion of the lens body toward an inner surface side of the 2-color molded lens, wherein an anti-fogging coating film is formed on the inner surface, the 2-color molded lens being characterized in that:
the primary molded article is formed along the outer surface of the 2-color molded lens so as to go around from the lens body to the lens peripheral wall,
the secondary molded article is formed along the inner surface of the 2-color molded lens so as to be wound from the lens peripheral wall portion toward the lens main body portion,
the joint surface of the primary molded article and the secondary molded article on the inner surface side of the 2-color molded lens is positioned on the lens body,
and a covering part extending from a joint surface with the primary molded article along an inner surface of the primary molded article and covering the primary molded article.
The specific shape of the above-mentioned "2-color molded lens" is not particularly limited as long as the primary molded article is formed by winding from the lens body portion to the lens peripheral wall portion along the outer surface of the 2-color molded lens and the secondary molded article is formed by winding from the lens peripheral wall portion to the lens body portion along the inner surface of the 2-color molded lens.
The "lens peripheral wall portion" may be formed over the entire periphery of the peripheral edge portion of the lens body portion, or may be formed in a part thereof.
The "covering portion" is not particularly limited in specific shape as long as it extends from a joint surface with the primary molded article along the inner surface thereof so as to cover the primary molded article.
The effects of the present invention are explained below:
the secondary molded article of the 2-color molded lens according to the present invention is formed by winding the secondary molded article along the inner surface thereof from the lens peripheral wall portion toward the lens main body portion, and the covering portion is formed by extending the secondary molded article so as to cover the primary molded article along the inner surface of the primary molded article from the joining surface with the primary molded article.
Therefore, even in the case where it takes a certain time or more until the curing is completed after the anti-fog coating film is formed on the inner surface of the lens, the occurrence of cracks around the corner portion of the primary molded article can be effectively suppressed, and thus, appearance defects due to the cracks can be effectively suppressed.
Thus, according to the present invention, the 2-color molded lens having the antifogging coating film formed on the inner surface thereof can effectively suppress the occurrence of appearance defects.
In the above configuration, when a hard coat film is formed on the outer surface of the 2-color molded lens, the following operational effects can be obtained:
that is, in the 2-color molded lens in which the hard coating film is formed on the outer surface and the antifogging coating film is formed on the inner surface, in the case where these film forming operations are performed in the hybrid type film forming step, it takes a long time from the formation of the antifogging coating film to the completion of the curing thereof, but in the 2-color molded lens according to the present invention, no groove-like gap is present in the corner portion of the primary molded product, and therefore, the occurrence of appearance defects due to cracks can be effectively suppressed. Therefore, by adopting the hybrid type film forming process, labor saving in the film forming process can be achieved, and thus the work efficiency in the 2-color molded lens manufacturing process can be improved.
In the above-described configuration, further, if the covering portion of the secondary molded article is configured such that the front end surface thereof extends obliquely toward the inner surface of the primary molded article, the antifogging paint is less likely to accumulate at the connecting portion between the covering portion of the secondary molded article and the inner surface of the primary molded article. Therefore, the antifogging coating material accumulated in the connecting portion can be effectively prevented from being impregnated into the primary molded article, and thus, the occurrence of cracks around the corner portion of the primary molded article can be more effectively prevented.
In this case, if the inclination angle of the front end surface of the covering portion is set to 30 to 60 °, the filling property of the molten resin into the covering portion is sufficiently ensured when the secondary molded article is molded, and the effect that the antifogging paint is less likely to accumulate at the connecting portion between the front end surface of the covering portion of the secondary molded article and the inner surface of the primary molded article can be improved.
In the above configuration, further, if the primary molded article is configured such that the fillet R formed at the corner between the inner surface of the primary molded article and the joint surface of the secondary molded article is set to a value of R0.1 to 0.5mm, the covering portion can be formed to have a small covering width by suppressing the covering portion extending from the joint surface of the primary molded article and the secondary molded article while sufficiently ensuring the filling property of the molten resin into the covering portion when the secondary molded article is molded, and thus, more parts of the lens main body portion can be effectively used as the transparent region.
In the above configuration, if the angle between the joint surface of the primary molded article and the secondary molded article and the inner surface of the primary molded article is set to a value of 100 ° or more, the filling property of the covering portion with the molten resin can be improved when the secondary molded article is molded.
In the above configuration, further, as a configuration of the primary molded article, when an annular region is formed along the joining surface with the secondary molded article, the annular region is opposed to a general region located on the inner peripheral side of the annular region, a convex thick portion is formed on the inner surface side of the 2-color molded lens, and a rounded corner R of r0.2mm or more is formed at a corner portion (hereinafter also referred to as "second corner portion") of the inner surface of the general region and the inner peripheral surface of the thick portion, the following operational effects can be obtained:
that is, in order to manufacture a 2-color molded lens with high accuracy, it is important to maintain the positioning state of the primary molded article in the mold when molding the secondary molded article.
In order to achieve this object, as a configuration of the primary molded article, a method of positioning the primary molded article, which is conventionally adopted, is to form an annular region along a joint surface with the secondary molded article as a thick portion in advance, and press-contact a mold with the thick portion when the secondary molded article is molded.
However, since the thick portion is somewhat crushed by the pressing of the die, stress concentration occurs at the second corner portion of the primary molded product, and cracks may occur in the peripheral region of the second corner portion.
On the other hand, if the primary molded article is configured such that the second corner portion is formed with a rounded corner R of r0.2mm or more, stress concentration can be prevented from occurring in the second corner portion even if the thick portion is somewhat crushed. Therefore, the occurrence of cracks in the peripheral region of the second corner portion can be effectively suppressed, and the occurrence of appearance defects due to the occurrence of cracks can be effectively suppressed.
Drawings
Fig. 1 is a front view showing a 2-color molded lens according to an embodiment of the present invention.
Fig. 2 is a sectional view taken along line II-II of fig. 1.
Fig. 3 is a detailed view of section iii of fig. 2.
FIG. 4(a) is a detailed view of the portion IV of FIG. 3, and (b) is a view similar to (a) showing a state in which a secondary molded article of the 2-color molded lens is molded.
Fig. 5(a1) to (a3) show the manufacturing steps of the 2-color molded lens, and (b1) to (b4) show the conventional manufacturing steps in comparison with (a1) to (a 3).
Fig. 6(a1) is a detailed view of part vi in fig. 3, (b1) is a view similar to (a1) showing a state when the secondary molded article is molded, and (a2) and (b2) are views similar to (a1) and (b1) showing comparative examples of the above embodiment.
Fig. 7 shows first and second modified examples of the above embodiment, and is the same as fig. 4 (a).
The symbols in the drawings have the following meanings:
2-operating personnel
10-2 color formed lens
10 a-outer surface
10a1, 10b 1-engaging surface
10b, 10Pa1, 10Sa1, 210Sa 1-inner surface
10 c-attachment site
10P-Primary molded article
10 Pa-thick wall part
10Pa 2-inner peripheral surface
10 Pb-corner
10 Pc-corner (second corner)
10S, 110S, 210S-Secondary Molding
10Sa, 110Sa, 210 Sa-main body side winding-in part
10Sb, 110Sb, 210 Sb-covering parts
10Sb1, 110Sb1, 210Sb 1-front end face
12-lens body part
14-peripheral wall part of lens
16-outer peripheral flange part
22-hard coat film
24-antifogging coating film
100-secondary forming die
102. 104-nozzle
106-ultraviolet irradiation device
108-heating furnace
110Sa 1-first interior surface
110Sa 2-second interior surface
110 Sc-inclined plane
C. Cb-space for secondary forming
F-extrusion force
P1-hard coating
P2 antifogging paint
RA, RB-round corner R
Rs-molten resin
T-thickness of coverage
W-coverage width
Theta 1-angle of inclusion
Theta 2-angle of inclination
Detailed Description
The present invention will be described with reference to the accompanying drawings, and the following embodiments are not intended to limit the components, types, combinations, shapes, relative arrangements, and the like.
FIG. 1 is a front view showing a 2-color molded lens according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. 1.
In the above figures, the direction indicated by X is the "front" of the 2-color molded lens 10, the direction indicated by Y is the "left direction" (the "right direction" in the front view of the lens) orthogonal to the "front", and the direction indicated by Z is the "upper direction". The same applies to other figures.
As shown in fig. 1, the 2-color molded lens 10 according to the present embodiment is a translucent cover of a headlamp disposed at the front right end portion of a vehicle, and is composed of a primary molded article 10P made of a transparent resin (e.g., a colorless and transparent PC resin) and a secondary molded article 10S made of an opaque resin (e.g., a black PC resin or an ABS resin).
The 2-color molded lens 10 includes a lens body 12 having a substantially rectangular shape in transverse length in front view of the lamp, a lens peripheral wall portion 14 extending from an outer peripheral edge of the lens body 12 toward an inner surface 10b side (i.e., lens rear side) of the 2-color molded lens 10, and an outer peripheral flange portion 16 extending from a rear end position of the lens peripheral wall portion 14 toward an outer peripheral side. When the 2-color molded lens 10 is mounted on a vehicle, the lens body 12 forms an external surface extending along the shape of the vehicle body surface.
As shown in fig. 2, the primary molded article 10P is formed by winding from the lens body 12 to the lens peripheral wall portion 14 along the outer surface 10a of the 2-color molded lens, while the secondary molded article 10S is formed by winding from the lens peripheral wall portion 14 to the lens body 12 along the inner surface 10b of the 2-color molded lens.
The joint surface 10a1 between the primary molded article 10P and the secondary molded article 10S on the outer surface 10a side of the 2-color molded lens 10 is located at a substantially central position of the lens body 12 and the outer peripheral flange 16 of the lens peripheral wall portion 14. On the other hand, the joint surface 10b1 of the primary molded article 10P and the secondary molded article 10S on the inner surface 10b side of the 2-color molded lens 10 is located in the vicinity of the peripheral edge of the lens body 12.
The 2-color molded lens 10 according to the present embodiment is configured such that a hard coat film 22 is formed on the outer surface 10a thereof and an antifogging coating film 24 is formed on the inner surface 10b thereof. At this time, the hard coat film 22 is formed to cover the entire region of the primary molded article 10P, and the anti-fog coating film 24 is also formed to cover the entire region of the primary molded article 10P.
Before describing the detailed structure of the 2-color molded lens 10, the manufacturing process thereof will be described.
Fig. 5(a1) to (a3) are diagrams showing a hybrid film forming process as a process for performing a film forming operation on the 2-color molded lens 10 after completion of molding.
In this hybrid film forming process, after the hard coat film 22 is formed on the outer surface 10a of the 2-color molded lens 10 in the first process shown in fig. 5(a1), the antifogging coating film 24 is formed on the inner surface 10b, then the hard coat film 22 is cured by ultraviolet irradiation in the second process shown in fig. 5(a2), and finally the antifogging coating film is cured by heat in the third process shown in fig. 5(a 3).
In the first step shown in fig. 5(a1), after the hard coat film 22 is formed in a state where the 2-color molded lens 10 is placed on a jig (not shown) provided on a turret (not shown), the turret is rotated by 180 °, and the anti-fogging coating film 24 is formed in this state.
The hard coat film 22 is formed by spraying the hard coat paint P1 from the nozzle 102 onto the outer surface 10a of the 2-color molded lens 10 while moving the nozzle 102 of the spray gun along the outer surface 10 a.
In this case, as the hard coat paint P1, for example, an acrylic hard coat paint composed of an acrylic monomer, an ultraviolet absorber, a light stabilizer, a polymerization initiator, a solvent, and the like can be used.
The anti-fog coating film is formed by spraying the anti-fog paint P2 from the nozzle 104 onto the inner surface 10b of the 2-color molded lens 10 while moving the nozzle 104 of the spray gun along the inner surface 10 b.
In this case, as the antifogging coating material P2, for example, a propylene-based antifogging coating material composed of a propylene resin, a surfactant, a curing agent (catalyst), and the like can be used.
In the second step shown in fig. 5(a2), the outer surface 10a of the 2-color molded lens 10 is irradiated with ultraviolet light from the ultraviolet irradiation device 106 to cure the hard coat film 22 applied to the outer surface 10 a. The 2-color molded lens 10 may be heated by infrared irradiation or the like before the ultraviolet irradiation.
In the third step shown in fig. 5(a3), the 2-color molded lens 10 is placed in a heating furnace 108, and the inner surface 10b thereof is heated with hot air at about 120 ℃ to cure the antifogging coating film 24 applied on the inner surface 10 b.
The second and third steps are performed by continuously conveying the 2-color molded lens 10 on a roller conveying path (not shown).
In this hybrid film forming process, in addition to the inspectors after film formation, the operator 2 is disposed as one person between the first process and the second process in order to perform the operation of transferring the 2-color molded lens 10 from the turntable to the roller conveying path.
On the other hand, fig. 5(b1) to (b4) are diagrams showing a conventional independent film forming process as a process for performing a film forming operation on the 2-color formed lens 10 after completion of the forming.
First, in the first step shown in fig. 5(b1), while moving the nozzle 102 of the spray gun along the outer surface 10a of the 2-color molded lens 10, the hard coat paint P1 is sprayed from the nozzle 102 toward the outer surface 10a, thereby forming the hard coat film 22 on the outer surface 10 a.
Next, in a second step shown in fig. 5(b2), the outer surface 10a of the 2-color molded lens 10 is irradiated with ultraviolet rays from the ultraviolet irradiation device 106 to cure the hard coating film 22 applied to the outer surface 10 a.
Next, in a third step shown in fig. 5(b3), the antifogging coating film 24 is formed on the inner surface 10b by moving the nozzle 104 of the spray gun along the inner surface 10b of the 2-color molded lens 10 and spraying the antifogging paint P2 from the nozzle 104 toward the inner surface 10 b.
Finally, in the fourth step shown in fig. 5(b4), the 2-color molded lens 10 is placed in a heating furnace 108, and the inner surface 10b thereof is heated by hot air at about 120 ℃.
In this independent film forming step, in addition to the inspector after the film formation, the worker 2 is disposed between the first step and the second step in order to perform the operation of transferring the 2-color formed lens 10 from the work area for hard coating to the work area for ultraviolet irradiation, and the worker 2 is disposed between the third step and the fourth step in order to perform the operation of transferring the 2-color formed lens 10 from the work area for anti-fog coating to the work area for heating furnace 108. Further, the worker 2 is also disposed between the second step and the third step as necessary.
By switching the independent film forming process to the hybrid film forming process, at least one operator 2 can be reduced.
Next, the detailed structure of the 2-color molded lens 10 will be described.
Fig. 3 is a detailed view of section III of fig. 2.
As shown in fig. 3, an annular region along the joint surface 10b1 of the primary molded article 10P is formed as a thick portion 10Pa protruding toward the lens rear side with respect to a general region on the inner peripheral side thereof.
On the other hand, in the secondary molded article 10S, the inner surface 10Sa1 of the main body side run-in portion 10Sa run-in toward the lens main body portion 12 side is formed to be convex toward the lens rear side with respect to the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P, and extends substantially parallel to the inner surface 10Pa 1.
Further, a covering portion 10Sb is formed extending from the main body side run-in portion 10Sa so as to cover the thick portion 10Pa, extending from the joining surface 10b1 with the primary molded article 10P along the inner surface 10Pa1 of the thick portion 10 Pa.
Fig. 4(a) is a detailed view of the section IV of fig. 3.
As shown in fig. 4(a), in the primary molded article 10P, the angle θ 1 between the inner surface 10Pa1 of the thick portion 10Pa and the joint surface 10b1 is set to a value of 100 ° or more (e.g., a value of about 120 °).
In the primary molded article 10P, a fillet R having a size of RA 0.1 to 0.5mm (for example, RA 0.3 mm) is formed at the corner 10Pb of the inner surface 10Pa1 of the thick portion 10Pa and the joint surface 10b 1.
The corner portion 10Pb is formed at the following position: the distance from the connecting position 10c between the lens body 12 and the lens peripheral wall 14 on the inner surface 10b side of the 2-color molded lens 10 is about 1 to 3mm (e.g., about 2 mm).
On the other hand, the covering portion 10Sb of the secondary molded article 10S is formed such that the front end face 10Sb1 thereof extends obliquely toward the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P. At this time, the inclination angle θ 2 of the front end face 10Sb1 of the covering portion 10Sb is set to a value of about 30 to 60 ° (e.g., about 45 °).
The covering width W of the covering portion 10Sb (i.e., the width from the R-fillet stop position on the joint surface 10b1 side of the corner portion 10Pb to the front end position of the front end face 10Sb 1) is set to a value of about 0.5 to 1mm (e.g., about 0.8 mm).
The covering thickness T of the covering portion 10Sb (i.e., the thickness in the lens front-rear direction) is equal to the step between the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P and the inner surface 10Sa1 of the main body side winding portion 10Sa of the secondary molded article 10S, and is set to a value of about 0.4 to 1mm (e.g., about 0.5 mm).
The anti-fogging coating film 24 is formed so as to cover the entire region of the portion of the primary molded article 10P in the inner surface 10b of the 2-color molded lens 10, the entire regions of the inner surface 10Sa1 of the main body side run-around portion 10Sa of the secondary molded article 10S and the front end face 10Sb1 of the covering portion 10Sb, and the front end region of the inner surface of the lens peripheral wall portion 14.
Fig. 4(b) shows a state in which a secondary molded article 10S of the 2-color molded lens 10 is molded, and is the same as fig. 4 (a).
As shown in fig. 4(b), the secondary molded article 10S is formed by injecting a molten resin Rs into a secondary molding space C formed between the secondary molding die 100 and the primary molded article 10P disposed in the die 100.
At this time, the mold 100 is arranged in a state of being pressed against the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P. The molten resin Rs flows around the surface of the mold 100, and fills the secondary molding space C and the secondary molding space Cb for forming the covering portion 10Sb of the secondary molded article 10S.
When the secondary molded article 10S is molded in this manner, the primary molded article 10P receives the pressing force F on the joint surface 10b1 thereof due to the molten resin Rs filled in the secondary molding space C, and therefore, residual stress tends to occur around the corner portion 10Pb of the primary molded article 10P in the 2-color molded lens 10 after molding is completed.
In this regard, in the present embodiment, when the molding of the secondary molded article 10S is completed, the covering portion 10Sb is formed so as to cover the corner portion 10Pb of the primary molded article 10P, and therefore, the possibility of cracks occurring around the corner portion 10Pb due to the residual stress is suppressed to a minimum.
When the secondary molded article 10S is molded, since the thick portion 10Pa of the primary molded article 10P is pressed by the mold 100, the molded 2-color molded lens 10 has a shape in which the pressed portion of the mold 100 is slightly (for example, about 0.1 to 0.15 mm) displaced toward the outer surface 10a side from the other portion on the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P after molding.
Fig. 6(a1) is a detailed view of section VI of fig. 3.
As shown in fig. 6(a1), in the primary molded article 10P, a fillet R (for example, RB 0.2 to 0.8 mm) having RB equal to or greater than r0.2mm is formed at a corner portion (i.e., a second corner portion) 10Pc of the inner peripheral surface 10Pa2 of the thick portion 10Pa and the inner surface 10b of the general region located on the inner peripheral side thereof.
Fig. 6(b1) shows a state when the secondary molded article 10S of the 2-color molded lens 10 is molded, and is the same as fig. 6(a 1).
As shown in fig. 6(b1), when the secondary molded article 10S is molded, the mold 100 is pressed against the thick portion 10Pa of the primary molded article 10P, and therefore, as described above, the thick portion 10Pa is somewhat crushed, and the inner surface 10Pa1 thereof is displaced from the position shown by the two-dot chain line to the position shown by the solid line in the figure. Accordingly, the corner portion 10Pc is crushed more or less, and thus the round angle R is smaller than the original round angle R (i.e., the round angle R shown by the two-dot chain line in the figure), but the corner portion 10Pc maintains a state in which the round angle R having a radius RB of r0.2mm or more is formed.
Fig. 6(a2) and (b2) are views similar to fig. 6(a1) and (b1) showing a comparative example of the present embodiment.
As shown in fig. 6(a2), when the primary molded article 10P is formed such that the inner peripheral surface 10Pa2 of the thick portion 10Pa and the corner portion 10Pc of the inner surface 10b of the general region located on the inner peripheral side thereof form only the pin angle (right angle) or the angle R close to the pin angle, when the secondary molded article 10S is formed, as shown in fig. 6(b2), the thick portion 10Pa is somewhat crushed by the pressure contact of the mold 100 with the thick portion 10Pa of the primary molded article 10P and the inner surface 10Pa1 is displaced from the position shown by the two-dot chain line to the position shown by the solid line in the figure, stress concentration occurs in the peripheral region Asc of the corner portion 10Pc of the primary molded article 10P.
Therefore, as shown in fig. 6(a2), when the anti-fog coating film 24 is formed thereafter, the above stress concentration may cause a crack CR in the peripheral region Asc of the corner portion 10 Pc.
Next, the operation and effects of the present embodiment will be described.
The 2-color molded lens 10 according to the present embodiment extends along the inner surface 10b thereof from the lens peripheral wall portion 14 to the body side run-in portion 10Sa of the secondary molded article 10S formed by running in the lens body 12, to form the covering portion 10Sb extending from the joining surface 10b1 with the primary molded article 10P along the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P so as to cover the primary molded article 10P, and therefore, it is possible to prevent the formation of a groove-like gap at the corner portion 10Pb of the primary molded article 10P.
Therefore, even when it takes a certain time or more before the completion of the curing after the anti-fog coating film 24 is formed on the inner surface 10b of the 2-color molded lens 10, the occurrence of cracks around the corner portion 10Pb of the primary molded article 10P can be effectively suppressed, and thus, the occurrence of appearance defects due to cracks can be effectively suppressed.
Thus, according to the present embodiment, the occurrence of appearance defects can be effectively suppressed in the 2-color molded lens 10 having the anti-fog coating film formed on the inner surface 10 b.
In particular, since the 2-color molded lens 10 according to the present embodiment is configured to form the hard coat film 22 on the outer surface 10a thereof, the following operational effects can be obtained.
That is, in the 2-color molded lens 10 in which the hard coating film 22 is formed on the outer surface 10a and the antifogging coating film 24 is formed on the inner surface 10b, in the case where these film forming operations are performed in the hybrid film forming step, it takes a long time from the formation of the antifogging coating film 24 to the completion of the hardening thereof, but in the 2-color molded lens 10 according to the present embodiment, there is no groove-like gap in the corner portion 10Pb of the primary molded product 10P, and therefore, appearance defects due to the occurrence of cracks can be effectively suppressed. Therefore, by adopting the hybrid type film forming process, labor saving in the film forming process can be achieved, and thus the work efficiency in the 2-color molded lens manufacturing process can be improved.
Further, since the covering portion 10Sb of the secondary molded article 10S is formed such that the front end face 10Sb1 extends obliquely toward the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P, the antifogging paint is less likely to accumulate at the connecting portion between the front end face 10Sb1 and the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P. Therefore, the antifogging coating material accumulated in the connecting portion can be effectively prevented from being impregnated into the primary molded article 10P, and the occurrence of cracks around the corner portion 10Pb of the primary molded article 10P can be more effectively prevented.
At this time, since the inclination angle θ 2 of the front end face 10Sb1 of the covering portion 10Sb is set to 30 to 60 °, when the secondary molded article 10S is molded, the filling property of the molten resin Rs into the covering portion 10Sb is sufficiently ensured, and the effect of preventing the antifogging paint from being accumulated at the connecting portion between the front end face 10Sb1 of the covering portion 10Sb of the secondary molded article 10S and the inner surface 10Pa1 of the thick portion 10Pa of the primary molded article 10P can be improved.
In the present embodiment, in the primary molded article 10P, the radius R formed at the corner portion 10Pb of the bonding surface 10b1 of the secondary molded article 10S and the inner surface 10Pa1 of the thick portion 10Pa is set to a value RA of 0.1 to 0.5mm, so that when the secondary molded article 10S is molded, the filling property of the molten resin Rs into the covering portion 10Sb is sufficiently ensured, the covering width W of the covering portion 10Sb formed to extend from the bonding surface 10b1 of the primary molded article 10P and the secondary molded article 10S can be suppressed to a small extent, and thus, a larger portion of the lens body 12 can be effectively used as a transparent region.
In the present embodiment, since the angle between the joint surface 10b1 between the primary molded article 10P and the secondary molded article 10S and the inner surface 10b of the primary molded article 10P is set to a value of 100 ° or more, when the secondary molded article 10S is molded, the filling property of the molten resin Rs into the covering portion 10Sb can be improved.
In the present embodiment, since the thick portion 10Pa is formed in the primary molded article 10P, when the secondary molded article 10S is molded, the 2-color molded lens 10 can be manufactured with high accuracy by maintaining the primary molded article 10P in a state of being positioned in the mold 100, and the rounded corner R having RB equal to or larger than r0.2mm is formed at the corner portion (i.e., the second corner portion) 10Pc of the inner surface 10b of the general region of the primary molded article 10P and the inner peripheral surface 10Pa2 of the thick portion 10Pa, so that the following operational effects can be obtained:
that is, when the secondary molded article 10S is molded, the thick portion 10Pa of the primary molded article 10P is pressed by the mold 100 and is somewhat crushed, but since the corner portion 10Pc is formed with the fillet R where RB is equal to or larger than r0.2mm, even if the thick portion 10Pa is somewhat crushed, the stress concentration at the corner portion 10Pc can be prevented. Therefore, the occurrence of cracks around the corner portion 10Pc due to the stress concentration can be effectively suppressed, and the occurrence of appearance defects due to the occurrence of cracks can be effectively suppressed.
In the above embodiment, the 2-color molded lens 10 is described as a translucent cover of a vehicle headlamp, but the same operational effects as those of the above embodiment can be obtained even when the lens is used for other applications.
Although the hard coat film 22 is formed on the outer surface 10a of the 2-color molded lens 10 in the above embodiment, such a hard coat film 22 may not be formed.
Next, a modified example of the above embodiment will be explained.
First, a first modification of the above embodiment will be described.
Fig. 7(a) shows a main part of a 2-color molded lens according to this modification, and is the same as fig. 4 (a).
As shown in fig. 7(a), the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the secondary molded article 110S is partially different from that of the above embodiment.
That is, in the present modification, the covering portion 110Sb is formed to extend from the joint surface 10b1 with the primary molded article 10P along the inner surface 10Pa1 of the thick portion 10Pa and cover the primary molded article 10P, at the body-side run-in portion 110Sa of the secondary molded article 110S.
However, the secondary molded article 110S of the present modification is configured such that the main body side run-in portion 110Sa includes a first inner surface 110Sa1 extending substantially parallel to the inner surface 10Pa1 of the thick portion 10Pa (i.e., similar to the inner surface 10Sa1 of the above embodiment), and a second inner surface 110Sa2 formed to be convex toward the lens rear side with respect to the first inner surface 110Sa 1.
The covering portion 110Sb of the present modification has the same shape as the covering portion 10Sb of the above embodiment, and the front end face 110Sb1 thereof also has the same shape as the front end face 10Sb1 of the covering portion 10Sb of the above embodiment.
In addition, the stepped portions of the first inner surface 110Sa1 and the second inner surface 110Sa2 are also constituted by slopes 110Sc having substantially the same shape as the front end surface 110Sb1 of the cover 110 Sb.
Even when the configuration of this modification is adopted, the same operational effects as those of the above embodiment can be obtained.
Further, with the configuration of the present modification, when the secondary molded article 110S is molded, the filling property of the molten resin into the covering portion 110Sb can be further improved.
Next, a second modification of the above embodiment will be described.
Fig. 7(b) is a view similar to fig. 4(a) showing the main part of the 2-color molded lens according to the present modification.
As shown in fig. 7(b), the basic configuration of this modification is the same as that of the above embodiment, but the configuration of the secondary molded article 210S is partially different from that of the above embodiment.
That is, in the present modification, the covering portion 210Sb is formed to extend from the joint surface 10b1 with the primary molded article 10P along the inner surface 10Pa1 of the thick portion 10Pa and cover the primary molded article 10P, at the body-side run-in portion 210Sa of the secondary molded article 210S.
However, the secondary molded article 210S of the present modification is formed such that the inner surface 210Sa1 of the main body side wraparound portion 210Sa thereof extends in a direction inclined toward the lens rear side toward the lens peripheral wall portion 14 side.
The covering portion 210Sb of the present modification has the same shape as the covering portion 10Sb of the above embodiment, and the front end face 210Sb1 thereof also has the same shape as the front end face 10Sb1 of the covering portion 10Sb of the above embodiment.
Even when the configuration of this modification is adopted, the same operational effects as those of the above embodiment can be obtained.
Further, with the configuration of the present modification, when the secondary molded article 210S is molded, the filling property of the molten resin into the covering portion 210Sb can be further improved.
In the above embodiments and modifications, the numerical values indicated as the parameters are merely examples, and may be set to appropriately different numerical values.
The present invention is not limited to the configurations described in the above embodiments and modifications thereof, and various modifications other than the above may be adopted.
The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the above embodiments. Various modifications may be made within the scope of the technical idea of the present invention, and they are within the scope of the present invention.
Claims (10)
1. A2-color molded lens comprising a primary molded article made of a transparent resin and a secondary molded article made of an opaque resin, the lens having a lens body and a peripheral lens wall portion rising from a peripheral edge portion of the lens body toward an inner surface of the 2-color molded lens, and an anti-fogging coating film being formed on the inner surface, the 2-color molded lens being characterized in that:
the primary molded article is formed along the outer surface of the 2-color molded lens so as to go around from the lens body to the lens peripheral wall,
the secondary molded article is formed along the inner surface of the 2-color molded lens so as to be wound from the lens peripheral wall portion toward the lens main body portion,
the joint surface of the primary molded article and the secondary molded article on the inner surface side of the 2-color molded lens is positioned on the lens body,
and a covering part extending from a joint surface with the primary molded article along an inner surface of the primary molded article and covering the primary molded article.
2. The 2-color molded lens according to claim 1, wherein:
a hard coat film was formed on the outer surface of the 2-color molded lens.
3. The 2-color molded lens according to claim 1, wherein:
the covering part is formed such that a front end surface of the covering part extends obliquely toward an inner surface of the primary molded article.
4. The 2-color molded lens according to claim 2, characterized in that:
the covering part is formed such that a front end surface of the covering part extends obliquely toward an inner surface of the primary molded article.
5. The 2-color molded lens according to claim 3, wherein:
the inclination angle of the front end face of the covering section is set to 30-60 degrees.
6. The 2-color molded lens according to claim 4, wherein:
the inclination angle of the front end face of the covering section is set to 30-60 degrees.
7. The 2-color molded lens according to any one of claims 1 to 6, characterized in that:
in the primary molded article, a fillet radius R formed by the inner surface of the primary molded article and the corner of the joint surface is set to a value of R0.1 to 0.5 mm.
8. The 2-color molded lens according to any one of claims 1 to 6, characterized in that:
the angle between the joint surface and the inner surface of the primary molded article is set to a value of 100 ° or more.
9. The 2-color molded lens according to any one of claims 1 to 6, characterized in that:
the primary molded article is formed by: the annular region along the joint surface is formed to protrude toward the inner surface of the 2-color molded lens as a thick portion with respect to a general region located on the inner peripheral side of the annular region,
a corner between the inner surface of the general region of the primary molded article and the inner peripheral surface of the thick portion is formed with a fillet radius R of R0.2mm or more.
10. A2-color molded lens comprising a primary molded article made of a transparent resin and a secondary molded article made of an opaque resin, the lens having a lens body and a peripheral lens wall portion rising from a peripheral edge portion of the lens body toward an inner surface of the 2-color molded lens, and an anti-fogging coating film being formed on the inner surface, the 2-color molded lens being characterized in that:
the primary molded article is formed along the outer surface of the 2-color molded lens so as to go around from the lens body to the lens peripheral wall,
the secondary molded article is formed along the inner surface of the 2-color molded lens so as to be wound from the lens peripheral wall portion toward the lens main body portion,
the joint surface of the primary molded article and the secondary molded article on the inner surface side of the 2-color molded lens is positioned on the lens body,
the primary molded article is formed by: the annular region along the joint surface is formed to protrude toward the inner surface of the 2-color molded lens as a thick portion with respect to a general region located on the inner peripheral side of the annular region,
a corner between the inner surface of the general region of the primary molded article and the inner peripheral surface of the thick portion is formed with a fillet radius R of R0.2mm or more.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018212811 | 2018-11-13 | ||
| JP2018-212811 | 2018-11-13 | ||
| JP2019-103554 | 2019-06-03 | ||
| JP2019103554A JP7240259B2 (en) | 2018-11-13 | 2019-06-03 | Two-color molding lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111175859A CN111175859A (en) | 2020-05-19 |
| CN111175859B true CN111175859B (en) | 2021-10-22 |
Family
ID=70651887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910987985.4A Active CN111175859B (en) | 2018-11-13 | 2019-10-17 | 2-color formed lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111175859B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006337895A (en) * | 2005-06-06 | 2006-12-14 | Fujinon Corp | Plastic lens |
| JP4887934B2 (en) * | 2006-06-27 | 2012-02-29 | ソニー株式会社 | Optical element molding apparatus and molding method |
| CN103376482A (en) * | 2012-04-18 | 2013-10-30 | 阿尔卑斯电气株式会社 | Inclined surface-equipped lens |
| CN203413541U (en) * | 2013-08-22 | 2014-01-29 | 深圳市日上光电股份有限公司 | Led lens |
| JP2014176974A (en) * | 2013-03-13 | 2014-09-25 | Koito Mfg Co Ltd | Two-color molded product |
| JP2016030706A (en) * | 2014-07-28 | 2016-03-07 | キヤノン株式会社 | Light-shielding coating material, light-shielding coating material set, light-shielding film, optical element, and method for manufacturing optical element |
| JP2017001399A (en) * | 2011-07-20 | 2017-01-05 | 株式会社日本触媒 | Molding material |
| CN107357024A (en) * | 2016-05-09 | 2017-11-17 | 大立光电股份有限公司 | Imaging lens and electronic device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6217998B1 (en) * | 2016-10-26 | 2017-10-25 | 第一精工株式会社 | Resin sealing mold, primary molding mold, secondary molding mold, and resin molded product manufacturing method |
-
2019
- 2019-10-17 CN CN201910987985.4A patent/CN111175859B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006337895A (en) * | 2005-06-06 | 2006-12-14 | Fujinon Corp | Plastic lens |
| JP4887934B2 (en) * | 2006-06-27 | 2012-02-29 | ソニー株式会社 | Optical element molding apparatus and molding method |
| JP2017001399A (en) * | 2011-07-20 | 2017-01-05 | 株式会社日本触媒 | Molding material |
| CN103376482A (en) * | 2012-04-18 | 2013-10-30 | 阿尔卑斯电气株式会社 | Inclined surface-equipped lens |
| JP2014176974A (en) * | 2013-03-13 | 2014-09-25 | Koito Mfg Co Ltd | Two-color molded product |
| CN203413541U (en) * | 2013-08-22 | 2014-01-29 | 深圳市日上光电股份有限公司 | Led lens |
| JP2016030706A (en) * | 2014-07-28 | 2016-03-07 | キヤノン株式会社 | Light-shielding coating material, light-shielding coating material set, light-shielding film, optical element, and method for manufacturing optical element |
| CN107357024A (en) * | 2016-05-09 | 2017-11-17 | 大立光电股份有限公司 | Imaging lens and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111175859A (en) | 2020-05-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109946767B (en) | Two-color formed lens | |
| CN106313423B (en) | Method for manufacturing resin gear with metal core | |
| CN105538599B (en) | Two-color molding method, mold for two-color molding, and two-color molded article | |
| CN111175859B (en) | 2-color formed lens | |
| WO2017094288A1 (en) | Method for manufacturing rubber article mold and rubber article mold | |
| JP7240259B2 (en) | Two-color molding lens | |
| US20090019681A1 (en) | Method for repairing the surface of a formwork panel | |
| CN109414856B (en) | Mold and method for manufacturing two-color molded article | |
| JP2009040642A (en) | Optical device and its manufacturing method | |
| JP4295725B2 (en) | Manufacturing method of laminated mold | |
| CN108515660B (en) | Method for processing automobile automatic cruise radar covering piece | |
| KR101827280B1 (en) | Manufacturing method of middle core for molding caliper housing of disk brake | |
| US8318058B2 (en) | Method for manufacturing mold for molding optical element | |
| CN115264453A (en) | Splicing structure for multicolor lens of car lamp and preparation method thereof | |
| KR102072860B1 (en) | Jointing method for a steel panel using a flash butt welding | |
| JP5038021B2 (en) | In-mold coating mold | |
| JP5158077B2 (en) | In-mold coating mold | |
| JP7240268B2 (en) | multicolor molded lens | |
| JPH02139213A (en) | Method of forming surface protective layer for synthetic resin lens | |
| RU2729687C2 (en) | Method of masking a part on which a thermally sprayed coating is to be applied | |
| JP5877652B2 (en) | Tire vulcanization mold | |
| KR200490460Y1 (en) | A contact lens transfer printing module processed pulse laser | |
| JP2603534Y2 (en) | Sealed mold | |
| JP6775994B2 (en) | Manufacturing method of two-color molded products and two-color molded products | |
| JP7012588B2 (en) | Resin molding mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |