Gelatinizing method for improving mold pressing binding force of metal part and plastic matrix

Abstract

The invention provides a gelatinizing method for improving the mold pressing binding force of a metal part and a plastic matrix. By coating a glue saluting approximate in component of bulk pharmaceutical chemicals of a plastic matrix to a binding surface, mold-pressed with the plastic matrix, of the metal part, the binding force of the metal part and the plastic matrix is improved by taking the glue solution which not only has a good bonding action with the metal part, but also is reacted with the plastic matrix as an intermediate interface. The quality consistency after compression molding isgood, and the product quality is improved.

Description

technical field [0001] The invention relates to a glue coating method for improving the bonding force of metal parts and plastic substrates. Background technique [0002] Molded plastic parts containing metal parts are very common in thermosetting plastic parts. The main function is to insulate conductors through plastic insulators and meet heat resistance requirements. Such products are often due to different thermal expansion coefficients of metal materials and non-metal materials. After hot molding, due to thermal expansion and cold contraction, the metal parts and the plastic substrate have a problem of poor bonding, especially when the metal material is wrapped outside the non-metallic material, there will be a gap between the metal part and the plastic substrate. Moreover, this type of product often involves machining, electroplating and other processing content. After machining, cracks are prone to occur between the metal parts and the plastic substrate. During the el...

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Problems solved by technology

Moreover, this type of product often involves machining, electroplating and other processing content. After machining, cracks are prone to occur between the metal parts and the plastic substrate. During the electroplating process, the electroplating bath solution will penetrate into the cracks and cause poor insulation. These problems often plague production. In order to reduce the occurrence of such problems, the main measures taken on site are to adjust the molding parameters and machining parameters. The disadvantages of this method are: (1) The effect is not obvious. This method does not fundamentally solve the combination of metal inserts and plastic substrates. Even if the mechanical processing parameters are adjusted, most parts still have cracking problems, making the improvement effect not obvious

(2) The quality is unstable. The molding process is a special process. The molding parameters are changing at any time, and the human factors are large, so the parameters cannot be guaranteed to be stable. Therefore, the product quality cannot be kept stable by adjusting the molding parameters. To sum up, it is necessary make improvements

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