A core-pulling structure for solving multi-color injection molding of vehicle lamps

Abstract

The invention relates to a core-pulling structure used for solving color channeling of multicolor injection molding for a car lamp and belongs to the technical field of car lamps. The core-pulling structure comprises an upper insert, a sliding rod and a lower insert, wherein the upper insert is fixedly connected to the upper end of the lower insert, the sliding rod is arranged between the upper insert and the lower insert, a guide groove is formed in the lower insert, the sliding rod is nested in the guide groove, a limiting structure is arranged between the sliding rod and the lower insert, one side of the front end of the lower insert is provided with a filling port structure, and the tail end of the sliding rod is provided with a handle structure used for pushing and pulling the sliding rod. The core-pulling structure is simple in structure and reasonable in design, and can be used for skillfully solving the problem of color channeling in any directions.

Description

technical field [0001] The invention belongs to the technical field of car lamps, and in particular relates to a core-pulling structure for solving the color shifting of multi-color injection molding of car lamps. Background technique [0002] At present, when automotive lighting companies use multi-color injection molding for the outer lens of the lamp, due to the difference in fluidity after mixing materials of different colors, the materials of different colors are at the intersection of colors, and one of the materials of one color will flee into the other. In one material, the phenomenon of "color shifting" is caused. From the perspective of perception, the phenomenon of color shifting will result in rough workmanship and unsophisticated workmanship, which will lead to a decrease in the aesthetic value of the vehicle. For example, on the taillights of automobiles, the mask is made of two-color injection molding of red and white materials. According to the current two-c...

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Problems solved by technology

like figure 1 As shown, after injection molding, the A area in the figure is red, the B area is white, and the C area is the hot plate welding rib. It is injected at the same time as the A area, and it is also red. From the normal view direction of the person ( figure 1 From the perspective of the direction d in the figure), because the thickness of the red material in the C area is different from that in the A area, and the product in the C area has a demoulding slope and the partial melting of the C area after hot plate welding, etc., the modeling boundary between the C area and the A area is caused. It is not aligned, rather abrupt, and because of the "magnification" effect of the white transparent part outside the red (the magnification is proportional to the thickness of the white material), the "color shifting" appearance defect formed in the C area is more obvious

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