How to repair electric mold

& lt 1 & gt； Electroforming principle:

Everyone is familiar with electroplating. By electroplating, anticorrosive metal or plastic products, such as nickel, chromium, zinc and copper, can be deposited on the surface of another conductor, thus playing a protective or aesthetic role. Electroforming of injection mold is to put the master mold consistent with the cavity of injection mold. This master mold requires good size and accuracy, and then the master mold is placed as a cathode in the electroplating bath.

Then, the metal to be electroformed is put into the electroplating bath as a metal cation, and then direct current is applied. At this time, the metal plate of the anode will gradually become metal ions and enter the electrolyte, which will be deposited on the master mold as the cathode. After electrifying for a period of time, a metal layer with appropriate thickness will be deposited on the master mold, which is called electroforming layer. According to different electroforming materials, electroforming

There are three methods: cast iron, copper and nickel. Among them, electric cast iron is less used in injection mold. Electroforming nickel is the most widely used because of its high mechanical strength and hardness and small surface roughness, but it takes a long time and costs a lot. Electrocast copper is fast and cheap, but its mechanical strength is low and its wear resistance is not as good as that of nickel.

Characteristics of electroforming in<2>

Electroforming is a very different molding method from the usual mechanical cutting.

Its main features are as follows:

1) The electroforming shape is consistent with the height of the master mold. As long as the master mold is manufactured accurately, the electroforming accuracy can meet the requirements, and its surface roughness Ra can reach 0. 108m.

2) electroforming

It is formed by deposition method. No matter how complicated the shape is, electroforming can reproduce well, and it can also form a cavity that is difficult or even impossible to form by machining.

3) The electroformed nickel has good mechanical strength and can be put into use without heat treatment.

4) The manufacturing of the master mold is relatively simple and is not limited to metal materials. Non-metallic materials can also be electroformed after certain treatment, and even the parts of the product can be directly used as the master mold.

Disadvantages of<3> electroforming die;

The production cycle of electric castings is long, such as electroforming nickel, which usually takes several days. If the navigation keys in mobile phone accessories have high precision, even it takes 10- 15 days, and the thickness is uneven; The internal stress of electric casting is large, so it needs proper heat treatment. Electric castings are expensive, such as side keys or guide keys in mobile phone accessories, and the price is about 800~ 1200 RMB. There are many small-scale operations in Shenzhen electroforming mold factory, and the work and accuracy are not satisfactory to some extent.

Simply put, there are many ways to repair molds, and there are many ways to make molds, or even more.

Common methods of repairing accommodation molds;

1. When the product has burrs, the parting surface can be polished or EDM.

2. Re-fly the model.

3. Adjust the size of runner or gate.

4. Further save molds.