Manufacturing process of high-brightness black product

Abstract

The invention provides a manufacturing process of a high-brightness black product. The manufacturing process comprises the following steps: extruding PMMA (Polymethyl Methacrylate) to obtain a PMMA sheet, and extruding ABS (Acrylonitrile Butadiene Styrene) to obtain an ABS sheet; heating the PMMA sheet and the ABS sheet until the PMMA sheet and the ABS sheet are fully softened, wherein the heating temperature is 115-125 DEG C; co-extruding the PMMA sheet and the ABS sheet to prepare a composite membrane; carrying out gradient cooling on the composite membrane to normal temperature, wherein the adjacent gradient temperature difference is less than or equal to 20 DEG C; cutting the composite membrane into a flat membrane; the flat membrane is made into a formed membrane; and putting the formed film into an injection mold for injection molding to form a high-black-and-bright product. According to the manufacturing process of the high-brightness black product, the composite membrane is prefabricated, and injection molding is directly carried out on the composite membrane, so that the hue of the high-brightness black product is stable, the consistency of a mass production stage and a small sample plate stage is good, and the development and debugging period is shortened.

Description

technical field [0001] The invention relates to the technical field of production technology of auto parts, in particular to a production technology of high-brightness black products. Background technique [0002] High-gloss black is also called piano black. It has good appearance and strong visual impact, so it is widely used in the interior and exterior of automobiles to form high-gloss black products. [0003] The high-gloss black products in the prior art are usually realized by spraying, which has the following defects: multiple rounds of debugging are required in both the small sample stage and the mass production stage to lock the formula and process, and the development cycle is long; There is no connection between the processes, the degree of automation is low, and the production efficiency is low; the baking and curing time of the paint film is long, and the rhythm of injection molding and spraying is too different to be produced simultaneously; the liquid paint is...

AI Technical Summary

Problems solved by technology

[0003] The high-gloss black products in the prior art are usually realized by spraying, which has the following defects: multiple rounds of debugging are required in the small sample stage and mass production stage to lock the formula and process, and the development cycle is long; There are two processes, the processes cannot be connected, the degree of automation is low, and the production efficiency is low; the baking and curing time of the paint film is long, and the difference between injection molding and spraying is too large to be produced synchronously; liquid paint is affected by external factors such as temperature, humidity, and air gun pressure. There are many, and the production quality is unstable; the liquid paint is atomized and spread on the surface of the material, and the paint and the material are in point-to-face contact, which is easy to produce a grainy appearance on the surface of the painted part; the brightness is mainly achieved by spraying varnish, the intersection of the curved surface and the crown surface Small products are prone to sagging; the paint contains a large amount of toluene and xylene, which is highly toxic to the human body; the cost of the spraying process is high; the surface water drop angle after spraying the varnish is only 60° to 70°, and the contaminated fingerprints, dust Printing is not easy to clean, customers complain a lot

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