CN115264453A - Splicing structure for multicolor lens of car lamp and preparation method thereof - Google Patents

Abstract

The invention provides a splicing structure for a multicolor lens of a car lamp and a preparation method thereof, wherein the splicing structure comprises the following steps: an inner layer plastic structure and an outer layer plastic structure; the inner layer plastic structure comprises an inner layer plastic body part and an inner layer plastic opening part which are integrally formed; the outer layer plastic structure comprises an outer layer plastic body part and an outer layer plastic opening part which are integrally formed; the inner-layer plastic structure and the outer-layer plastic structure are spliced, the inner-layer plastic body part and the outer-layer plastic structure are spliced, and the inner-layer plastic opening part and the outer-layer plastic opening part are correspondingly spliced; the inner layer plastic structure and the outer layer plastic structure are spliced to form a splicing line; the outer plastic mouth is integrally formed with a step structure. The splicing structure provided by the invention solves the problem of layering of double-color joints caused by water accumulation of small V-shaped grooves at the double-color splicing positions by changing the shape, size and angle of the splicing part at the tail end close to the double-color joints, eliminates the appearance defect caused by double-color layering, and prolongs the service life of the car lamp.

Description

Splicing structure for multicolor lens of car lamp and preparation method thereof

Technical Field

The invention relates to the technical field of automobile lamps, in particular to a splicing structure for a multicolor lens of an automobile lamp and a preparation method thereof.

Background

The double-color injection molding outer lens is widely applied in the automobile lamp industry, the host factory has extremely high requirements on the appearance of the outer lens of the automobile lamp, and the outer lens of the automobile lamp is a key part which plays a role in sealing and protects internal parts. As shown in fig. 11, the two-color stitching method of the prior art has the following defects: the concatenation department leans on outer surface because the end that leans on the closed angle department can't fully fill and form tiny V type groove structure when moulding plastics, though later stage still can not eliminate V type groove structure through plasma flame treatment, because the existence in V type groove, ponding very easily, V type inslot can ponding when than following rainy day and carwash, simultaneously again because the existence of double-colored internal stress of moulding plastics, under the two combined action, the time has been of a specified duration can lead to double-colored injection structure to locate the layering at the piece joint, lead to the airtight problem of appearance defect even, finally lead to the car light to become invalid.

Although the treatment with plasma flame after molding can eliminate part of the internal stress, the internal stress cannot be completely eliminated, and the above-mentioned problems are inevitable due to the combined action of the residual internal stress and the accumulation of water or liquid during washing of the car. On the other hand, the plasma only eliminates partial stress of a part of the outer lens area, and cannot cover all two-color splicing positions of the outer lens, for example, plasma flame treatment cannot be carried out on the inner surface of the outer lens and the outer surface of the outer lens appearance, otherwise, the appearance area is blurred, and the stress removal of the appearance area is carried out by using an oven, but the problem is little in effect.

The outer lens of double-colored injection moulding is layered in the seam, can make the outward appearance of outer lens clearly see that there is the bright line in the middle of double-colored when observed, causes the appearance defect to host computer factory customer and the requirement of buying the car customer to the outward appearance increase day by day, and the outer lens of double-colored in the accumulation of seam punishment layering along with time can also have potential lens fracture problem simultaneously. In addition, even if the outer lens is injection-molded in two colors, not all structural parts of the outer lens are made of two layers or two-color materials, for the outer lens only with a partial area of two layers, if the layer of the mentioned partial area in the two layers is inner-layer plastic, then water vapor can enter the layer (outer-layer plastic) of the other color of the two-color lens along a gap formed by splicing the two layers after the overlapped area of the two layers is cracked due to the problems of v-shaped grooves, water accumulation, stress cracking and the like, and then the water vapor enters the inside of the lamp body, so that the air tightness of the vehicle lamp is poor, and further other serious and inevitable problems are caused.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a splicing structure for a multicolor lens of a vehicle lamp and a preparation method thereof.

According to the present invention, there is provided a lens assembly structure for a multicolor lens of a vehicle lamp, comprising: an inner layer plastic structure and an outer layer plastic structure; the inner layer plastic structure comprises an inner layer plastic body part and an inner layer plastic opening part which are integrally formed; the outer layer plastic structure comprises an outer layer plastic body part and an outer layer plastic opening part which are integrally formed;

the inner-layer plastic structure and the outer-layer plastic structure are spliced, the inner-layer plastic body part and the outer-layer plastic structure are spliced, and the inner-layer plastic opening part and the outer-layer plastic opening part are correspondingly spliced; the inner-layer plastic structure and the outer-layer plastic structure are spliced to form a splicing line;

a step structure is integrally formed on the outer layer plastic mouth part.

Preferably, the size C of the plastic opening of the outer layer is more than or equal to 1.5mm.

Preferably, the height dimension D of the step structure is 0.15 to 0.4mm.

Preferably, the height dimension D of the step structure is 0.2mm.

Preferably, the splicing line is a linear structure.

Preferably, the splicing line is a linear structure which is bent or bended for multiple times.

Preferably, the demolding angle alpha of the outer layer plastic mouth part is more than or equal to 10 degrees

Preferably, the angle β formed by the step structure and the demolding direction is 90 ° ± 20 °.

Preferably, the angle gamma between the inner layer plastic structure and the mold opening direction is more than or equal to 10 degrees.

The invention also provides a preparation method of the splicing structure for the car lamp, which is based on the splicing structure for the car lamp and specifically comprises the following steps:

step 1: injection molding the double-color plastic parts of the inner layer plastic structure and the outer layer plastic structure in a mold; (ii) a

Step 2: carrying out plasma flame injection from the side surface of the step structure of the outer layer plastic structure, and taking the side surface direction of one side of the step structure far away from the inner layer plastic structure as the first injection direction of plasma flame;

and step 3: and taking the upper side of the position where the step structure after the first plasma flame injection is melted and falls down as the second injection direction of the plasma flame from the upper position of the step structure.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the double-color splicing structure, the shape, the size and the angle of the splicing part are changed at the tail end close to the double-color joint, so that the problem of layering of the double-color joint caused by water accumulation of a tiny V-shaped groove at the double-color splicing part is solved, the appearance defect caused by layering of double colors is eliminated, and the service life of the car lamp is prolonged;

2. the double-color splicing structure increases the splicing area between the inner layer plastic structure and the outer layer plastic structure, so that the splicing force bonding force between the inner layer plastic structure and the outer layer plastic structure is larger, the splicing between the inner layer plastic structure and the outer layer plastic structure is firmer and more reliable, the reliability of the outer lens molding is ensured, and appearance defects such as bright lines, cracks and the like are avoided;

3. the arrangement of the mold stripping angle of the outer layer plastic mouth part ensures that the outer layer plastic structure cannot be dragged by the friction force of the mold to cause the increase and delamination of the abutted seams; the arrangement of the angle between the step structure and the mold stripping direction ensures the effectiveness of the mold clamping jaw holding force; the arrangement of the inner-layer plastic structure and the angle of the die opening direction ensures that the inner-layer plastic structure is not dragged by the friction force of the die to cause the increase and layering of the abutted seams; the size of the opening of the outer layer plastic ensures the strength of the joint of the outer layer plastic and the inner layer plastic.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a first schematic structural diagram of a splicing structure for a multicolor lens of a vehicle lamp in one embodiment;

FIG. 2 is a schematic size diagram of the lens assembly of FIG. 1 for a vehicle lamp multicolour lens;

FIG. 3 is a schematic diagram of a second embodiment of a multi-color lens assembly for a vehicle lamp;

FIG. 4 is an enlarged view of the H-section of the lens assembly of FIG. 3 before plasma flame treatment;

FIG. 5 is an enlarged view of the H-section of the mosaic structure for a multicolored lens for a vehicle lamp of FIG. 3 after plasma flame treatment;

FIG. 6 is a schematic size view of the lens package for a vehicle lamp multicolored lens of FIG. 3 after plasma flame treatment;

FIG. 7 is a schematic flow chart illustrating operation of the plasma flame treatment of the lens assembly of FIG. 3;

FIG. 8 is a schematic structural diagram of a spliced structure for a multicolor lens of a vehicle lamp in which a splicing line is a straight line structure according to an embodiment;

FIG. 9 is a schematic view of the spliced structure for a multicolored lens of a vehicle lamp of FIG. 8 after ion flame treatment;

FIG. 10 is a graph showing a comparison of the effect after processing of a step structure selected with different height dimensions D;

FIG. 11 is a schematic representation of a prior art tile structure before and after ion flame treatment;

fig. 12 is a schematic diagram of a structure in which a partial mosaic structure exists in the prior art.

The figures show that:

inner layer plastic structure 1 and outer layer plastic body part 201

Inner plastic body 101 and outer plastic mouth 202

Inner plastic mouth 102 splicing line 3

Outer layer plastic structure 2 step structure 4

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1:

as shown in fig. 1 to 7, the present embodiment provides a splicing structure for a multicolor lens for a vehicle lamp, including: the plastic structure comprises an inner-layer plastic structure 1 and an outer-layer plastic structure 2, wherein the inner-layer plastic structure 1 comprises an inner-layer plastic body part 101 and an inner-layer plastic mouth part 102 which are integrally formed, and the outer-layer plastic structure 2 comprises an outer-layer plastic body part 201 and an outer-layer plastic mouth part 202 which are integrally formed. Inlayer plastic structure 1 and outer plastic structure 2 concatenation setting, inlayer plastic body portion 101 and the concatenation setting of outer plastic structure 2, inlayer plastic oral area 102 and the corresponding concatenation setting of outer plastic oral area 202, inlayer plastic structure 1 and the concatenation of outer plastic structure 2 formation concatenation line 3, integrated into one piece is provided with stair structure 4 on the outer plastic oral area 202.

The splicing line 3 is a linear structure which is bent or bended for many times, the linear structure which is bent or bended for many times can increase the splicing area between the inner layer plastic structure 1 and the outer layer plastic structure 2, the splicing force binding force between the inner layer plastic structure and the outer layer plastic structure is larger, the splicing between the inner layer plastic structure and the outer layer plastic structure is firmer and more reliable, the reliability of the outer lens forming is ensured, and appearance defects such as bright lines and cracks are avoided.

The mold stripping angle alpha of the outer layer plastic mouth part 202 is larger than or equal to 10 degrees, and if the angle is too small, the outer layer plastic structure is easily dragged by the friction force of the mold in the mold stripping stage to cause the increase of the abutted seams and the delamination.

The angle beta between the step structure 4 and the mold stripping direction is 90 degrees +/-20 degrees, so that the mold clamping jaw can effectively retain the outer layer plastic structure on the front mold when the outer layer plastic structure is opened, and the effectiveness of the mold clamping jaw retaining force can be influenced by too large or too small angle.

The angle gamma between the inner-layer plastic structure 1 and the mold opening direction is more than or equal to 10 degrees, and if the angle is set to be too small, the inner-layer plastic structure is easy to be dragged by the friction force of the mold in the mold discharging stage during injection molding to cause the increase of abutted seams and delamination.

The dimension C of the outer plastic mouth 202 is larger than or equal to 1.5mm, and if the dimension C is too small, the strength of the joint between the outer plastic structure and the inner plastic structure is affected. The parameter C determines the enveloping of the outer layer plastic structure 2 and the thickness of the splicing part, and determines the splicing strength, if the parameter C is too short, the problems of thin thickness of the splicing part of the step structure 4 and insufficient strength after splicing can be caused, and the splicing strength can be ensured to be reliable by more than or equal to 1.5mm.

The height dimension D of the step structure 4 is 0.15-0.4 mm, in a preferred embodiment, the height dimension D of the step structure 4 is 0.2mm, if the height dimension D is too large, the subsequent plasma flame can not completely melt and fill the V-shaped groove formed at the joint of the inner and outer plastic structures, and residues after the plasma flame is melted can exist, the residues are not filled in the V-shaped groove, the size of the residues is not small, the appearance is seriously affected, the V-shaped groove formed at the joint of the inner and outer plastic structures can not be completely filled, and the V-shaped groove can not be filled and covered. D has decided on the one hand that mosaic structure can form fine including with reliable concatenation, on the other hand has decided to avoid the V-arrangement groove problem, if D is too little, can make the stair structure just similar overlap equally, can lead to the mosaic structure concatenation power not enough, unable reliable envelope, still can bring other appearance defects, if D is too big, can lead to the unable complete reliable envelope of outer plastic structure, outside the concatenation power existence problem, it is not enveloped more importantly V-arrangement groove problem area, as shown in figure 10, can bring stair structure 4 and can become B line region in the A line region that the theory appeared originally after plasma flame treatment.

The inner layer plastic structure 1 and the outer layer plastic structure 2 are both made of PC materials or PMMA materials. In practical applications, ABS materials should be avoided, which may present serious appearance problems after plasma flame treatment, or at least the step structure and the structure relating to the appearance surface area.

The embodiment also provides an outer lens which comprises the double-color splicing structure.

As shown in fig. 8 and 9, in other embodiments, the splice line 3 may be a straight line structure.

The embodiment also provides a manufacturing method of a splicing structure for a multicolor lens of an automobile lamp, which is based on the splicing structure for the multicolor lens of the automobile lamp and specifically comprises the following steps:

step 1: injection molding the double-color plastic parts of the inner plastic structure 1 and the outer plastic structure 2 in a mold;

step 2: carrying out plasma flame spraying from the side surface of the step structure 4 of the outer layer plastic structure 2, and taking the side surface direction of one side of the step structure 4 far away from the inner layer plastic structure 1 as the first plasma flame spraying direction;

and step 3: from the upper position of the stepped structure 4, the upper side of the position where the stepped structure 4 after the first plasma flame spraying is melted and fallen down is taken as the second spraying direction of the plasma flame.

The plasma flame is sprayed only on the layer of the outer plastic structure 2 during the first spraying, and is sprayed along the side surface of the step structure 4 of the outer plastic structure 2, so that the plasma flame is not sprayed to the inner plastic structure 1, and the plasma flame sprayed for the first time does not contact the inner plastic structure 1. If the plasma flame is sprayed to the inner-layer plastic structure 1 for the first time, the inner-layer plastic structure 1, particularly the position of a v-shaped groove at the joint of the inner-layer plastic structure 1 and the outer-layer plastic structure 2, can be formed under the action of the plasma flame, the problem of the v-shaped groove caused by the plasma flame spraying is more serious in the first-time plasma flame spraying, the problems of layering and bright lines can be caused in the first-time plasma flame spraying, and the problems of layering and bright lines caused by the first-time plasma spraying cannot be solved by how the later outer-layer plastic structure covers the inner-layer plastic structure.

The plasma flame direction is sprayed from top to bottom during the second spraying, the plasma flame mainly aims at the step structure 4 of the outer layer plastic structure 2 which is partially softened or melted and gradually sags after the first spraying, then the plasma flame is sprayed and melted again or is contacted and combined with the part of the inner layer plastic structure 1, the plasma flame sprayed for the second time can also indirectly act on the inner layer plastic structure 1 of the combining surface in the process, the plasma flame has the heating and assisting functions for the combination of the plasma flame and the step structure 4 of the outer layer plastic structure 2, and can also partially directly act on the inner layer plastic structure 1, and the plasma flame direction is mainly used for assisting the combination between the edge and the outer side of the inner layer plastic structure 1 enveloped by the step structure 4 of the outer layer plastic structure 2 after the plasma flame spraying for two times and improving the combining force effect between the edge and the outer side of the inner layer plastic structure 1.

Example 2:

those skilled in the art will understand this embodiment as a more specific description of embodiment 1.

As shown in fig. 1, this embodiment provides a double-colored mosaic structure, be close to the geometry and the size of mould parting line department change concatenation line at double-colored concatenation, and make outer plastic structure than inlayer plastic structure and exceed 0.2mm, form a stair structure, go the partial melting parcel that moulds plastics that goes out through subsequent handling plasma flame and wrap up on the inlayer and fill the tiny V type groove characteristic between the two piece through the stress of moulding plastics, eliminate the V type groove of concatenation department, prevent concatenation department V type groove ponding and lead to double-colored outer lens to separate from the joint.

Fig. 1 is a two-dimensional cross-sectional view of the two-color splicing structure of this embodiment, which includes an inner plastic structure 1, an outer plastic structure 2, an inner plastic mouth 102, an outer plastic mouth 202, two-color splicing lines, and a step structure 4.

In a preferred embodiment, the two-color patch cord structure is in the form of a multi-bend or meander, hook-like, or S-shaped cord structure.

As shown in fig. 8 and 9, in other embodiments, the two-color splicing line is also in the form of a linear structure, the splicing line between the outer layer plastic structure and the inner layer plastic structure of two colors is a straight line, and after the step structure 4 which is higher out is melted by plasma flame and the V-shaped groove is filled, the splicing line and the splicing area are in the form of about 90 degrees.

As shown in fig. 1 to 7, the double-color splicing line is in a line structure form of multiple bending or bending, similar to a hook shape or an S shape, after the step structure 4 is melted by the plasma flame and the V-shaped groove is filled, an S-shaped splicing line is integrally formed at the mouth part or approximately formed by firstly folding in one direction (bending or not in the middle) and then reversely bending in a direction of about 180 degrees with the direction of the first folding to form a form of about 180 degrees, the outer-layer encapsulation range is large, the splicing area is large, and the bonding force is strong.

As shown in fig. 1 to 7, after the V-shaped groove is melted and filled by the plasma flame, the hook-like multi-bending or bending structure of the two-color splicing line is designed, so that the outer layer plastic structure 2 approximately wraps the inner layer plastic structure 1. The design of similar hook form makes simultaneously has the effect that a package connects and grabs the power, the concatenation power has been increased, increase and guarantee outer plastic structure 2 and wrap the power of inlayer plastic structure 1, and the concatenation area has been increased, the linear concatenation line is after plasma flame melts, with the hook form concatenation line after plasma flame melts, hook form concatenation line structure is because inside many times, or outside bending and buckling make the concatenation area or outer plastic structure to inlayer plastic structure's package grafting scope and area bigger, the increase of concatenation area makes between the double-colored material of outer lens, the concatenation power cohesion between outer plastic structure 2 and inlayer plastic structure 1 is bigger promptly.

Outer plastic structure 2 has wrapped inlayer plastic structure 1, increases the concatenation power between outer plastic structure 2 and the inlayer plastic structure 1, increases the concatenation area between outer plastic structure 2 and the inlayer plastic structure 1 for the concatenation is more firm and reliable between the double-colored outer plastic structure of outer lens and the inlayer plastic structure, outside guaranteeing outer lens fashioned reliability, avoids appearance defects such as bright line and fracture appearance.

When the double-color splicing line structure is designed into a line structure form which is bent or bent for many times, is similar to a hook shape or an S shape, rounded corners or circular arcs or curved surface transition regions can be arranged in areas bent for many times and some scream structures, the injection molding flowability is better, and the quality and the appearance of the molded outer lens are optimized.

The key size of the splicing structure is set in the double-color splicing structure, as shown in fig. 2:

the mold stripping angle alpha of the outer layer plastic mouth part is set to be more than or equal to 10 degrees, and if the angle is set to be too small, the outer layer plastic structure 2 is easy to be dragged by the friction force of the mold in the mold stripping stage to cause the increase and the delamination of the abutted seams; in order to ensure that the outer layer plastic can be effectively retained on the front mold by the mold clamping jaws during mold opening during punching of the outer layer plastic, an angle beta formed by the step structure 4 and the mold stripping direction needs to be set within a range of 90 degrees +/-20 degrees, and the effectiveness of the retaining force of the mold clamping jaws can be influenced when the angle is too large or too small; the angle gamma between the inner-layer plastic structure 1 and the mold opening direction is more than or equal to 10 degrees, and if the angle is too small, the inner-layer plastic structure 1 is easily dragged by the friction force of the mold in the mold discharging stage to cause the increase and delamination of the abutted seams; the size C of the outer plastic opening part needs to be more than or equal to 1.5mm, and if the size C is too small, the strength of the joint of the outer plastic structure 2 and the inner plastic structure 1 is affected; e is the size of clamping characteristics reserved for the clamping jaws when the outer-layer plastic structure is subjected to injection molding, and the size is required to be larger than or equal to 1mm in order to ensure that the clamping jaws of the mold can effectively keep the outer-layer plastic structure on the front mold when the mold is opened for the first time; the height dimension D of the step structure 4 is set equal to 0.2mm, if the height dimension D is set too large, the subsequent plasma flame cannot completely melt and fill the V-shaped groove formed at the joint of the inner and outer plastic structures, and there may be residues after the plasma flame is melted, the residues are not filled in the V-shaped groove, the size of the residues is not small, the appearance is seriously affected, and if the height dimension D is too small, the V-shaped groove formed at the joint of the inner and outer plastic structures cannot be completely filled, and the V-shaped groove cannot be filled and covered. Under the condition of ensuring the setting of the size parameters, the product punched by the mold has the step structure 4 shown in figure 1, the step structure 4 which is higher is melted and covers the opening part of the inner layer plastic when the injection molding stress is removed through the plasma flame in the follow-up process, and the V-shaped groove formed by the inner layer plastic structure and the outer layer plastic structure is eliminated.

The arrangement of the mold stripping angle alpha of the outer layer plastic mouth part ensures that the outer layer plastic structure 2 cannot be dragged by the friction force of the mold to cause the increase and delamination of the abutted seams; the arrangement of an angle beta formed by the step structure 4 and the mold stripping direction ensures the effectiveness of the mold jaw retaining force; the arrangement of the inner-layer plastic structure 1 and the angle gamma in the mold opening direction ensures that the inner-layer plastic structure 1 cannot be dragged by the friction force of the mold to cause the increase of the abutted seam and delamination; the size C of the outer layer plastic mouth part ensures the strength of the joint of the outer layer plastic structure and the inner layer plastic structure; the arrangement of the dimension E of the clamping characteristic of the clamping jaw for the outer-layer plastic structure during injection ensures that the clamping jaw of the mold can effectively keep the outer-layer plastic structure on the front mold during the first mold opening; the height dimension D of the step structure 4 ensures that the plasma flame can completely melt the structure material and fill the melted structure material, and completely fills the V-shaped groove characteristic formed at the joint of the inner layer plastic and the outer layer plastic.

As shown in fig. 7, when plasma flame is sprayed, in order to further ensure reliability and appearance of the outer lens and solve the problem of delamination of the two-color material of the two-color lens and the appearance defect of bright lines caused by the delamination, the plasma flame is subjected to a process of spraying twice: the first time is that plasma flame spraying is carried out from the side surface of the step structure 4, and the side surface direction of the side of the step structure 4 far away from the inner layer plastic structure 1 is taken as the first time plasma flame spraying direction; the second time is from the upper position of the stepped structure 4, and is the upper side of the position where the stepped structure 4 has been gradually melted and fallen after the first plasma flame injection as the plasma flame second injection direction. The structure shown in fig. 5 is formed after two times of plasma flame spraying, stress is removed, the V-shaped groove is covered, and the problem of layering and bright line of a double-color material structure of the double-color outer lens is solved.

In the aspect of material selection of the outer lens, the outer lens is made of PC, PMMA and ABS as a two-color injection molding material, but the ABS material is required to be avoided, and after plasma flame treatment, the ABS material can have serious appearance problems, or at least the step structure and the structure related to the appearance surface area avoid the ABS material.

Double-colored outer lens is more commonly used in the car light trade, can be black and transparent double-colored, can be red and black double-colored, red and transparent double-colored etc., double-colored concatenation department, especially step structure 4 covers V-arrangement groove department through plasma flame treatment, outer plastic structure 2's colour is if the colour of selecting to be darker than inlayer plastic structure 1, then the potential outward appearance problem of the concatenation line of double-colored concatenation department and concatenation punishment layer light line also can be sheltered from, improve and solve, consequently red and transparent double-colored can set up red in the transparent outside, outer plastic structure 2 chooses red for use, inlayer plastic structure 1 chooses for use transparently, black and transparent double-colored can set up black in the transparent outside, outer plastic structure 2 chooses for use black, inlayer plastic structure 1 chooses for use transparently, red and black double-colored can set up black in the red outside, outer plastic structure 2 chooses for use black, inlayer plastic structure 1 chooses for use red.

When outer lens is three-colour concatenation, four-colour concatenation or more colour concatenations, all can have splice line layering and bright line outward appearance problem that this V-arrangement groove and ponding etc. arouse jointly in polychrome concatenation department, but the scheme of this embodiment all is suitable for, only needs to set up stair structure and splice line structure in concatenation department, just can solve outward appearance and splice punishment layer problem.

In other embodiments, an independent black sheet area can be further arranged on the outer layer of the splicing position of the bicolor lens, and the black shielding function can be effectively applied to shield appearance problems such as bright lines and the like caused by layering of the splicing lines.

According to the double-color splicing structure, the shape, the size and the angle of the splicing part are changed at the tail end close to the double-color joint, so that the problem of layering of double-color joints caused by water accumulation of small V-shaped grooves at the double-color splicing part is solved, the appearance defect caused by layering of double colors is eliminated, and the service life of the car lamp is prolonged.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, are not to be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A mosaic structure for car light polychrome lens characterized in that includes: an inner plastic structure (1) and an outer plastic structure (2); the inner-layer plastic structure (1) comprises an inner-layer plastic body part (101) and an inner-layer plastic mouth part (102) which are integrally formed; the outer layer plastic structure (2) comprises an outer layer plastic body part (201) and an outer layer plastic opening part (202) which are integrally formed;

the inner-layer plastic structure (1) and the outer-layer plastic structure (2) are spliced, the inner-layer plastic body part (101) and the outer-layer plastic structure (2) are spliced, and the inner-layer plastic opening part (102) and the outer-layer plastic opening part (202) are correspondingly spliced; the inner plastic structure (1) and the outer plastic structure (2) are spliced to form a splicing line (3);

the outer layer plastic mouth part (202) is integrally provided with a step structure (4).

2. The lens assembly structure of claim 1, wherein the size C of the outer plastic mouth (202) is greater than or equal to 1.5mm.

3. The splicing structure for a multicolor lens for vehicular lamp according to claim 1, wherein a height dimension D of said step structure (4) is 0.15 to 0.4mm.

4. The splicing structure for a multicolored lens of a vehicular lamp as claimed in claim 3, wherein a height dimension D of said step structure (4) is 0.2mm.

5. The splicing structure for a multicolored lens of a vehicle lamp as claimed in claim 1, wherein said splicing line (3) is a straight line structure.

6. The splicing structure for a multicolored lens of a vehicle lamp as claimed in claim 1, wherein said splicing line (3) is a linear structure that is bent or folded a plurality of times.

7. The lens assembly structure of claim 1, wherein the outer plastic mouth (202) has an exit angle α ≧ 10 °.

8. The splicing structure for a multicolored lens of a vehicle lamp as claimed in claim 1, wherein said step structure (4) forms an angle β of 90 ° ± 20 ° with the ejection direction.

9. The splicing structure for a multicolor lens for an automotive lamp according to claim 1, wherein an angle γ between the inner-layer plastic structure (1) and a mold opening direction is not less than 10 °.

10. A method for manufacturing a spliced structure of a multicolor lens for a vehicle lamp, based on the spliced structure of a multicolor lens for a vehicle lamp according to any one of claims 1 to 9, comprising the following steps:

step 1: injection molding the double-color plastic parts of the inner layer plastic structure (1) and the outer layer plastic structure (2) in a mold;

step 2: carrying out plasma flame injection from the side surface of the step structure (4) of the outer layer plastic structure (2), taking the side surface direction of one side of the step structure (4) far away from the inner layer plastic structure (1) as the first injection direction of the plasma flame, and enabling the first injected plasma flame not to contact the inner layer plastic structure (1);

and step 3: and taking the upper side of the position where the step structure (4) is melted and fallen after the primary plasma flame injection as the secondary injection direction of the plasma flame from the upper position of the step structure (4).

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