Demolding liquid medicine and demolding method of aluminum stamping protective film

Abstract

The invention relates to demolding liquid medicine and a demolding method of an aluminum stamping protective film. The demolding liquid medicine is prepared from dichloromethane, methanoic acid and alcohol, wherein the proportion of the dichloromethane to the methanoic acid to the alcohol is (5 to 7):( 4 to 2):1, and raw liquid is used. The demolding method comprises the following steps of (1) soaking aluminum in the liquid medicine, wherein the temperature of the liquid medicine is 18 to 25 DEG C, and the soaking time is 7 to 9 min; (2) washing the aluminum with water until no liquid medicine exists on the surface of the aluminum. The demolding method has the advantages of simple process, mild conditions and short demolding time, manual tearing can be replaced to remove the protective film, and no adhesive residue or corrosion exists on the surface of a treated product.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a stripping solution and a stripping method for an aluminum stamping protective film. Background technique [0002] Because aluminum alloy has many excellent physical and chemical properties, it is applied to various fields of the national economy, especially the increasingly popular mobile phones. At present, almost 80% of mobile phones on the market use aluminum alloy for their battery covers. During the processing of such products, the aluminum alloy sheet is first sandblasted and then punched, and then anodized and other treatments are performed. Before stamping, it is necessary to cover the surface with a protective film to prevent damage to the surface of the plate during the stamping process. Therefore, the protective film on the surface needs to be removed before subsequent anodic oxidation and other processes. [0003] At present, it is mainly realized by manual...

AI Technical Summary

Problems solved by technology

It takes a long time to tear the film manually, and it is easy to cause scratches on the surface of the product during the use of tools; while the technology of removing the film using liquid medicine is not mature, first of all, it is necessary to prepare a suitable film removal liquid, and secondly, to find a suitable process. condition

For example, if the semi-finished mobile phone case to be stripped is soaked in the stripping solution, the residual glue on the contact surface of the film will be left if the time is short, and the corrosion will easily occur if the time is long.