Copper-based bushings, also known as copper bearings, are used in sliding rotary mechanisms to reduce friction while transferring force and supporting and locking assemblies. The copper bushing must be oiled on the bearing for lubrication. Copper base bushings are also made of various copper alloys and are used primarily to lubricate machine parts. So what causes the copper base bushing to sag easily? The following by Hangzhou copper base bushing Xiaobian to explain it.

Hangzhou copper base bushing

1. Residues mentioned in the reason of insufficient filling are present in the mold cavity. However, when concave, the residue in the cavity is not necessarily flocculent, but has a variety of irregular shapes, and the height of the residue above the surface is small, so the entry depth of copper casting is small.

2. In the case of poor operation of the injection mechanism of the machine, when the pressure of the working fluid is unstable, the injection pressure is also unstable. The injection pressure of the metal is intermittent, causing the surface layer of the copper casting to form more than once, but each time the position of the surface edge changes, part of the surface edge is not covered the previous time, resulting in the formation of the streaks.

3. Hot joint filled with large copper bushing. When it contracts, the surface layer contracts internally and the surface becomes concave despite its strength. This is called contraction.

4. During the filling process, the gas is caught between the metal flow and the wall of the cavity, and does not move, and depressions occur there. The concave surface is smooth and clean, and is mostly located in cavities that are difficult to ventilate, while the copper casting is located at the end edges.

The above four points are all the reasons for the depression of the copper-base bushing. Thank you for your understanding and support!


Post time: Feb-27-2021