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 polychromatic 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 polychromatic lenses of automobile lamps and a preparation method thereof.

Background technique

Two-color injection molding exterior light distribution mirrors are widely used in the automotive lighting industry. OEMs have extremely high requirements on the appearance of the exterior light distribution mirrors of automobile lights, and the exterior light distribution mirrors of automobile lights are key components that play a sealing role to protect internal parts. As shown in Figure 11, the two-color splicing method in the prior art has the following defects: the outer surface of the splicing part cannot be fully filled at the end of the sharp corner during injection molding, and a small V-shaped groove structure is formed. The V-shaped groove structure still cannot be eliminated. Due to the existence of the V-shaped groove, it is easy to accumulate water. For example, water will accumulate in the V-shaped groove during rainy days and car washes. , After a long time, the two-color injection molding structure will be delaminated at the joints, resulting in appearance defects and even airtight problems, which will eventually lead to failure of the lights.

Although the use of plasma flame treatment after molding can eliminate part of the internal stress, the internal stress cannot be completely eliminated, and the combined effect of the residual internal stress and the accumulation of long-term water or liquid during car washing makes the above problems unavoidable . On the other hand, plasma only eliminates part of the stress in the outer lens area, and cannot cover all the two-color splicing positions of the outer lens. For example, the inner surface of the outer lens and the outer surface of the outer lens cannot be treated with plasma flame, otherwise the appearance area will be damaged. Fuzzy, and the stress relief of the appearance area is to use an oven, but this has little effect on the above problems.

The layering of the two-color injection molded outer lens at the seam will make the appearance of the outer lens clearly visible when there is a bright line in the middle of the two-color, resulting in appearance defects, and OEM customers and car buyers have increasingly high requirements for appearance , At the same time, the delamination of the two-color outer lens at the seam may also cause potential lens cracking over time. In addition, even for the outer lens of two-color injection molding, not all the structural parts of the outer lens are two-layer or two-color materials. If the layer is the inner layer of plastic, then due to the above-mentioned problems such as v-shaped grooves, water accumulation, and stress cracking, after the overlapping area of the double layer cracks, water vapor will enter the other color of the two-color lens along the gap of the double-layer splicing. layer (outer plastic), water vapor enters the interior of the lamp body at this time, resulting in poor airtightness of the lamp, which in turn causes other serious and unavoidable problems, as shown in Figure 12, part C can be understood as It is only a partial area of the outer lens area, the D part can be understood as the whole or most of the outer lens area, the M area is inside the lamp, and the N area is outside the lamp.

Contents of the invention

Aiming at the defects in the prior art, the object of the present invention is to provide a splicing structure for polychromatic lenses of vehicle lamps and a preparation method thereof.

According to the present invention, a splicing structure for polychromatic lenses of vehicle lamps includes: an inner plastic structure and an outer plastic structure; the inner plastic structure includes an inner plastic body and an inner plastic Mouth; the outer plastic structure includes an outer plastic body and an outer plastic mouth that are integrally formed;

The inner plastic structure is spliced with the outer plastic structure, the inner plastic body is spliced with the outer plastic structure, and the inner plastic mouth is spliced with the outer plastic mouth setting; the inner plastic structure is spliced with the outer plastic structure to form a splicing line;

The outer plastic mouth is integrally formed with a stepped structure.

Preferably, the size C of the outer plastic mouth is ≥ 1.5mm.

Preferably, the height dimension D of the stepped structure is 0.15-0.4 mm.

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

Preferably, the stitching line is a linear structure.

Preferably, the stitching line is a linear structure with multiple bends or bends.

Preferably, the mold release angle of the outer plastic mouth is α≥10°

Preferably, the angle β formed between the stepped structure and the mold ejection direction is 90°±20°.

Preferably, the angle γ between the inner plastic structure and the mold opening direction is ≥10°.

The present invention also provides a method for preparing a splicing structure for vehicle lights, based on the above-mentioned splicing structure for vehicle lights, specifically comprising the following steps:

Step 1: Injection molding a two-color plastic part of the inner plastic structure and the outer plastic structure in a mold;

Step 2: Spray plasma flame from the side of the step structure of the outer plastic structure, and use the direction of the side of the step structure away from the side of the inner plastic structure as the first injection direction of the plasma flame;

Step 3: From the position above the step structure, the upper side of the position where the step structure melts and falls after the first plasma flame injection is used as the second injection direction of the plasma flame.

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

1. The two-color splicing structure of the present invention solves the problem of delamination of the two-color joint caused by the existence of tiny V-shaped grooves at the two-color joint by changing the shape, size, and angle of the splicing part near the end of the two-color joint. Appearance defects caused by double-color layering, and improve the service life of the car lights;

2. The two-color splicing structure of the present invention increases the splicing area between the inner plastic structure and the outer plastic structure, so that the splicing force between the inner plastic structure and the outer plastic structure is greater, and the inner plastic structure The splicing with the outer plastic structure is more solid and reliable, ensuring the reliability of the outer lens molding and avoiding appearance defects such as bright lines and cracks;

3. The setting of the ejection angle at the mouth of the outer layer of plastic in the present invention ensures that the outer layer of plastic structure will not be affected by the drag of the mold friction force and cause the seam to increase and delaminate; the setting of the angle formed by the step structure and the ejection direction ensures that the mold The effectiveness of the holding force of the jaws; the setting of the angle between the inner plastic structure and the mold opening direction ensures that the inner plastic structure will not be affected by the drag of the mold friction force, resulting in increased seams and delamination; the setting of the outer plastic mouth size Ensure the strength of the joint between the outer plastic and the inner plastic.

Description of drawings

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

Fig. 1 is a structural schematic diagram 1 of a splicing structure for a polychromatic lens of a car lamp in an embodiment;

Fig. 2 is a schematic diagram of the size of the splicing structure used for the polychromatic lens of the car lamp in Fig. 1;

Fig. 3 is a second schematic diagram of the mosaic structure for the multi-color lens of the car lamp in an embodiment;

Fig. 4 is an enlarged view of part H of the mosaic structure used for the car lamp polychromatic lens in Fig. 3 before plasma flame treatment;

Fig. 5 is an enlarged view of part H of the splicing structure used for the polychromatic lens of the car lamp in Fig. 3 after plasma flame treatment;

Fig. 6 is a schematic diagram of the size of the splicing structure used for the polychromatic lens of the car lamp in Fig. 3 after plasma flame treatment;

Fig. 7 is a schematic diagram of the operation flow of the spliced structure plasma flame treatment for the multi-color lens of the car lamp in Fig. 3;

Fig. 8 is a structural schematic diagram in which the splicing line used for the splicing structure of the polychromatic lens of the car lamp is a linear structure in an embodiment;

Fig. 9 is a structural schematic diagram of the spliced structure used for the polychromatic lens of the car lamp in Fig. 8 after ion flame treatment;

Figure 10 is a comparison diagram of the effect after the step structure with different heights and dimensions D is selected;

Figure 11 is a schematic diagram of the spliced structure in the prior art before and after ion flame treatment;

FIG. 12 is a schematic structural diagram of a partially spliced structure in the prior art.

The figure shows:

Inner layer plastic structure 1 Outer layer plastic body part 201

Inner plastic body part 101 Outer plastic mouth part 202

Inner layer plastic mouth 102 Splicing line 3

Outer plastic structure 2 Step structure 4

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Example 1:

As shown in Figures 1 to 7, this embodiment provides a splicing structure for multi-color lenses for vehicle lights, including: an inner plastic structure 1 and an outer plastic structure 2, the inner plastic structure 1 includes an integrally formed inner A plastic body part 101 and an inner plastic mouth part 102, the outer plastic structure 2 includes an outer plastic body part 201 and an outer plastic mouth part 202 integrally formed. The inner plastic structure 1 is spliced with the outer plastic structure 2, the inner plastic body part 101 is spliced with the outer plastic structure 2, the inner plastic mouth 102 and the outer plastic mouth 202 are spliced and set, and the inner plastic structure 1 is spliced with the outer plastic structure 2 to form a splicing line 3, and the outer plastic mouth 202 is integrally formed with a stepped structure 4.

The stitching line 3 is a linear structure with multiple bends or bends. The multiple bends or bends can increase the splicing area between the inner plastic structure 1 and the outer plastic structure 2, making the inner plastic structure The splicing force between the outer plastic structure and the outer plastic structure is stronger, making the splicing between the inner plastic structure and the outer plastic structure more firm and reliable, ensuring the reliability of the outer lens molding, and avoiding bright lines and cracks, etc. The appearance of cosmetic defects.

The ejection angle α of the outer plastic opening 202 is greater than or equal to 10°. If the angle is set too small, the outer plastic structure is easily affected by the drag of the mold during the ejection stage during injection molding, resulting in enlarged joints and delamination.

The angle β formed by the stepped structure 4 and the mold ejection direction is 90°±20°, which ensures that the mold claws can effectively retain the outer plastic structure on the front mold when the outer plastic structure is opened. This angle is too large Or too small will affect the effectiveness of the mold jaw retention.

The angle γ between the inner layer plastic structure 1 and the mold opening direction is ≥10°. If the angle is set too small, the inner layer plastic structure is easily affected by the drag of the mold friction during the injection molding stage, which will cause the seam to increase and delaminate.

The dimension C of the outer plastic mouth part 202 is ≥ 1.5mm. If this dimension is too small, it will affect the strength of the joint between the outer plastic structure and the inner plastic structure. The parameter C determines the envelope of the outer plastic structure 2 and the thickness of the splicing part, and at the same time determines the splicing strength. If C is too short, the thickness of the splicing part of the step structure 4 will be thin and the strength after splicing will be insufficient. C≥ 1.5mm can ensure reliable splicing strength.

The height dimension D of the stepped structure 4 is 0.15-0.4mm. In a preferred example, the height dimension D of the stepped structure 4 is 0.2mm. If this dimension is set too large, the subsequent plasma flame cannot completely melt it and fill it into the inner and outer layers In the V-shaped groove formed by the joint of the plastic structure, there may also be residues after the plasma flame melting. These residues are not filled into the V-shaped groove, and their size is not small, which will seriously affect the appearance and cannot completely integrate the inside and outside. The V-shaped groove formed at the junction of the layers of plastic is filled, but the V-shaped groove cannot be filled and covered. On the one hand, D determines that the splicing structure can form a good inclusion and reliable splicing. On the other hand, it determines the problem of avoiding the v-shaped groove. If D is too small, the step structure will be like flashing, which will lead to insufficient splicing force of the splicing structure. , cannot be reliably enveloped, and may also bring other appearance defects. If D is too large, the outer plastic structure will not be able to completely reliably envelope. In addition to the problem of splicing force, the more important thing is that the V-shaped groove problem area is not enveloped , as shown in FIG. 10 , it will bring about that the A-line region that originally appeared theoretically after the step structure 4 after plasma flame treatment will become the B-line region.

Both the inner plastic structure 1 and the outer plastic structure 2 are made of PC material or PMMA material. In practical applications, the use of ABS materials should be avoided. After plasma flame treatment, ABS materials will have serious appearance problems, or at least the stepped structure and the structure involving the appearance surface area should avoid the use of ABS materials.

This embodiment also provides an outer lens, including the above-mentioned two-color splicing structure.

As shown in FIG. 8 and FIG. 9 , in other embodiments, the stitching line 3 may also be a linear structure.

This embodiment also provides a method for preparing a splicing structure for a car lamp multi-color lens, based on the above-mentioned splicing structure for a car lamp multi-color lens, specifically including the following steps:

Step 1: Injection molding the two-color plastic parts of the inner plastic structure 1 and the outer plastic structure 2 in a mold;

Step 2: Spray plasma flame from the side of the stepped structure 4 of the outer plastic structure 2, and take the side direction of the side away from the stepped structure 4 away from the inner plastic structure 1 as the direction of the first injection of the plasma flame;

Step 3: From the position above the step structure 4, the upper side of the position where the step structure 4 melts and falls after the first plasma flame injection is used as the second injection direction of the plasma flame.

In the first injection, the plasma flame only sprays the layer of the outer plastic structure 2, and sprays along the side of the stepped structure 4 of the outer plastic structure 2, and does not spray it to the inner plastic structure 1, The plasma flame sprayed for the first time will not touch the inner plastic structure 1 . If the first plasma flame injection is sprayed to the inner plastic structure 1, the effect of the plasma flame will make the inner plastic structure 1, especially the junction of the inner plastic structure 1 and the outer plastic structure 2, there will be v The position of the V-shaped groove, the first plasma flame injection will cause the v-shaped groove problem to be more serious, and the first plasma flame injection will cause delamination and bright line problems, the outer layer of plastic behind No matter how the structure wraps the inner plastic structure, it cannot solve the problem of delamination and bright lines caused by the first plasma spray.

During the second injection, the direction of the plasma flame is sprayed from top to bottom. At this time, the plasma flame is mainly aimed at the step structure 4 of the gradually drooping outer plastic structure 2 that has been partially softened or melted after the first injection. Then spray it again and melt it or make it contact with the part of the inner plastic structure 1 and combine them together. It has the combination of heating and boosting and the stepped structure 4 of the outer plastic structure 2, and some of it will directly act on the inner plastic structure 1. This part is mainly in the step structure 4 of the outer plastic structure 2 during the two plasma flame sprays. The edge and the outer side of the inner plastic structure 1 that are enveloped afterwards help to combine the two and improve the binding force.

Example 2:

Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

As shown in Figure 1, this embodiment provides a two-color splicing structure, changing the geometry and size of the splicing line near the parting line of the mold, and making the outer plastic structure 0.2mm higher than the inner plastic structure, forming A stepped structure, through the subsequent process of plasma flame to remove the injection molding stress, at the same time, the higher part of the outer layer is melted and wrapped on the inner layer and filled with the small V-shaped groove features between the two joints, eliminating the V-shaped groove at the splicing place, Prevent the V-groove at the joint from accumulating water and cause the two-color outer light distribution lens to separate from the joint.

Figure 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 steps Structure 4.

In a preferred example, the two-color splicing line structure is in the form of a hook-like or S-shaped line structure that is bent or bent multiple times.

As shown in Figure 8 and Figure 9, in other embodiments, the two-color splicing line is also a straight line structure, that is, the splicing line between the two-color outer plastic structure and the inner plastic structure is a straight line, and the plasma flame melting is higher than After the stepped structure 4 and after the V-shaped groove is filled, the splicing line and splicing area are in the form of about 90°.

As shown in Figures 1 to 7, the two-color splicing line is a hook-shaped or S-shaped line structure that is bent or bent multiple times. Form an S-shaped stitching line or approximately fold it in one direction first (there may be a bend in the middle or not) and finally bend it in the opposite direction of about 180° to the above-mentioned first folded direction, forming an approximately 180° The form of left and right has a large range of outer rubber covering, a large splicing area, and strong binding force.

As shown in Figures 1 to 7, after the plasma flame melts and fills the V-shaped groove, the hook-like multiple bending or bending structure design of the two-color splicing line makes the outer plastic structure 2 approximately wrap Inner plastic structure1. At the same time, the hook-like design has the effect of wrapping and grabbing force, which increases the splicing force, increases and ensures the force of the outer plastic structure 2 enclosing the inner plastic structure 1, and increases the splicing area, linear After the splicing line is melted by the plasma flame, and the hook-shaped splicing line is melted by the plasma flame, the structure of the hook-shaped splicing line is bent and bent inwardly or outwardly for many times, so that the splicing area or the outer plastic structure is relatively large. The enclosing range and area of the inner plastic structure are larger, and the increase in the splicing area makes the splicing and bonding force between the two-color materials of the outer lens, that is, the outer plastic structure 2 and the inner plastic structure 1 greater.

The outer plastic structure 2 wraps the inner plastic structure 1, increasing the splicing force between the outer plastic structure 2 and the inner plastic structure 1, and increasing the splicing area between the outer plastic structure 2 and the inner plastic structure 1 , making the splicing between the two-color outer plastic structure and the inner plastic structure of the outer lens more firm and reliable, ensuring the reliability of the outer lens molding, and avoiding appearance defects such as bright lines and cracks.

When the two-color splicing line structure is designed as a multiple-bending or bending, hook-like, or S-shaped line structure, rounded corners or arcs or curved surfaces can be set in the multiple-bending area and some screaming structures In the transition area, the injection fluidity is better, and the quality and appearance of the molded outer lens are optimized.

Set the key dimensions of the splicing structure in the two-color splicing structure, as shown in Figure 2:

Set the ejection angle of the outer plastic mouth to α≥10°. If the angle is set too small, the outer plastic structure 2 is easily affected by the drag of the mold during the ejection stage during injection molding, which will cause the seam to increase and delaminate; In order to ensure that the mold claws can effectively retain the outer layer of plastic on the front mold when the plastic layer is opened, the angle β formed by the step structure 4 and the mold ejection direction needs to be set within the range of 90°±20°, which is too large Or too small will affect the effectiveness of the holding force of the mold jaws; the angle between the inner plastic structure 1 and the mold opening direction γ≥10°, if this angle is set too small, the inner plastic structure 1 is easily affected by the mold friction during the injection molding stage The effect of drag and drop causes the patchwork to increase and delaminate; the size C of the outer plastic opening needs to be ≥ 1.5mm, if this size is too small, it will affect the strength of the joint between the outer plastic structure 2 and the inner plastic structure 1; E is the outer layer The size of the plastic structure left for the clamping feature of the jaws during injection molding. In order to ensure that the mold jaws can effectively keep the outer plastic structure on the front mold when the mold is opened for the first time, the size needs to be ≥ 1mm; the step structure 4 The height dimension D is set equal to 0.2mm. If the dimension is set too large, the subsequent plasma flame cannot completely melt it and fill it into the V-shaped groove formed by the junction of the inner and outer plastic structures, and there may be residues after the plasma flame melts These residues are not filled into the V-shaped groove, and their size is not small, which will seriously affect the appearance. If the size is too small, the V-shaped groove formed at the junction of the inner and outer plastic structures cannot be completely filled. The V-shaped groove Still can't be filled and covered. In the case of ensuring the setting of the above size parameters, the molded product has a step structure 4 as shown in Figure 1, and the higher step structure 4 is melted and covered with the inner plastic port while the plasma flame is used to remove the injection stress. The part eliminates the V-shaped groove formed by the inner plastic structure and the outer plastic structure.

The setting of the ejection angle α at the mouth of the outer layer of plastic ensures that the outer plastic structure 2 will not be affected by the drag of the mold friction force, resulting in increased seam and delamination; the setting of the angle β formed by the step structure 4 and the ejection direction ensures that the mold The effectiveness of the holding force of the jaws; the setting of the angle γ between the inner plastic structure 1 and the mold opening direction ensures that the inner plastic structure 1 will not be affected by the drag of the mold friction force, resulting in increased seams and delamination; the outer plastic mouth The setting of dimension C ensures the strength of the joint between the outer layer plastic structure and the inner layer plastic structure; the setting of dimension E of the outer layer plastic structure left for the clamping feature of the jaws during injection molding ensures that the mold jaws can be used when the mold is opened for the first time. Effectively keep the outer layer of plastic structure on the front mold; the setting of the height dimension D of the step structure 4 ensures that the plasma flame can not only completely melt it but also fill the melted structure material, and completely fill the inner and outer plastic The V-groove feature formed at the joint.

As shown in Figure 7, when the plasma flame is sprayed, in order to further ensure the reliability and the appearance of the outer lens, solve the problem of delamination of the two-color material of the two-color lens and the defect of the bright line appearance caused by it, the plasma flame will be sprayed twice Treatment: The first time is to spray plasma flame from the side of the step structure 4, and the side direction of the side of the step structure 4 away from the inner plastic structure 1 is used as the first injection direction of the plasma flame; the second time is to spray the plasma flame from the side The upper position of the stepped structure 4 and the upper side of the position where the stepped structure 4 has gradually melted and collapsed after the first plasma flame injection is used as the second injection direction of the plasma flame. The structure shown in Figure 5 is formed after two plasma flame sprays, the stress is removed, the V-shaped groove is covered, and the problem of delamination of the two-color material structure and the bright line problem of the two-color outer lens are solved.

In terms of material selection for the outer lens, PC, PMMA, and ABS are generally used as two-color injection molding materials for the outer lens, but it is necessary to avoid the use of ABS materials. After plasma flame treatment, ABS materials will have serious appearance problems, or at least the stepped structure and the appearance surface The structure of the area avoids the use of ABS material.

Two-color outer lens is commonly used in the automotive lighting industry. It can be black and transparent two-color, red and black two-color, red and transparent two-color, etc. The two-color splicing part, especially the step structure 4 is covered by plasma flame treatment to cover the V-shaped groove. If the color of the outer plastic structure 2 is chosen to be darker than the color of the inner plastic structure 1, the potential appearance problems of the splicing lines at the two-color splicing and the layered bright lines at the splicing can also be blocked, improved and resolved, so red and For transparent two-color, red can be set outside the transparent color. The outer plastic structure 2 should be red, and the inner plastic structure 1 should be transparent. For black and transparent two-color, black can be set outside the transparent color. The outer plastic structure 2 should be black, and the inner plastic structure 1 should be transparent. The plastic structure 1 is transparent, and the red and black double colors can be arranged with black on the outside of the red. The outer plastic structure 2 is black, and the inner plastic structure 1 is red.

When the outer lens is three-color splicing, four-color splicing or multi-color splicing, there will be problems of splicing line delamination and bright line appearance caused by the V-shaped groove and water accumulation at the multi-color splicing place, but in this embodiment All the schemes are applicable, only need to set the step structure and the splicing line structure at the splicing place to solve the problem of appearance and layering of the splicing place.

In other embodiments, a separate layer of black film area can also be set on the outer layer of the splicing part of the two-color lens. Through the above-mentioned separate black film area set on the outer layer of the splicing part, the black blocking function can be effectively used to block the splicing Appearance problems such as bright lines caused by line layering.

The two-color splicing structure of the present invention solves the problem of delamination of the two-color joint caused by the presence of tiny V-shaped grooves at the two-color joint by changing the shape, size, and angle of the splicing part near the end of the two-color joint, and eliminates Cosmetic defects caused by layers, and improve the life of the lamp.

In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the application.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

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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