Three-color external decoration strip for automobile windshield and forming mold and method thereof

Abstract

The invention discloses a three-color external decoration strip for an automobile windshield and a forming mold and method of the three-color external decoration strip. The three-color external decoration strip for the automobile windshield comprises an ABS framework, a PMMA specular surface layer and TPU soft edges. The PMMA specular surface layer and the TPU soft edges are arranged on the ABS framework. The ABS framework 2 is provided with injection molding channels communicating with the front TPU soft edge 3 and the back TPU soft edge 4. According to the forming mold, the body framework is placed in a double-color injection mold as an insert, and then the three-color specular product, which is integrally formed from the three materials comprising the ABS body framework, the PMMA specular body surface layer and the TPU soft edges, is obtained; and besides, the technical breakthrough of front and back rubber coating is achieved through the combination of sliding blocks and sealing rubber cutters, and the problems caused when existing three-color injection molds are used are well solved. According to the three-color external decoration strip for the automobile windshield, under the condition of the same structure, the appearance quality and the environmental protection level of products are improved, and the product cost and the product weight are reduced.

Description

technical field [0001] The invention belongs to an exterior trim strip of an automobile windshield, and in particular relates to a three-color exterior trim strip of an automobile windshield, a forming mold and a method thereof. technical background [0002] The outer trim strip of the car windshield generally adopts a three-color high-gloss trim strip with front and back seals. Traditional three-color high-gloss trim, such as figure 2 As shown, the main body 2, soft rubber 3, 4 need to be injection-molded during processing, and then the high-gloss surface 10 is obtained by spraying on the main body 2, and then the two soft rubber 3, 4 are bonded to the main body with double-sided tape or glue 2, the process is complicated, the qualified rate is low, the cost is high, and the reliability of soft glue bonding is poor. If three-color injection molding is applied, three-color injection molding equipment and three-color injection molds are required, and the equipment investmen...

AI Technical Summary

Problems solved by technology

Traditional three-color high-gloss trim, such as figure 2 As shown, the main body 2, soft rubber 3, 4 need to be injection-molded during processing, and then the high-gloss surface 10 is obtained by spraying on the main body 2, and then the two soft rubber 3, 4 are bonded to the main body with double-sided tape or glue 2, the process is complicated, the pass rate is low, the cost is high, and the reliability of soft glue bonding is poor

If three-color injection molding is used, three-color injection molding equipment and three-color injection molds are required, and the equipment investment and mold cost are very high

Since the three-color injection mold must adopt the method of mold shifting or core pulling to realize the conversion of the three cavities, there are many restrictions on the shape and structure of the three-color product, and only the body 2 on the same plane and the soft rubber 3 around the body 2 can be realized. , 4 three-color molding, such as figure 1 As shown, it cannot be achieved as figure 2 The three-color trim strip shown is simultaneously three-color molding on the left, right, top, and bottom

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