Several Problems Happened In POM Machining

DALIAN, China - Feb. 20, 2023 - PRLog -- In recent years, POM is replacing some traditional metal materials to process precision parts, such as aluminum, brass, steel, zinc, etc. It has gradually been widely used in electronics and electricity, machinery, instruments and meters, daily light industry, automobiles, building materials, agriculture, etc.

This material is quite different from metal in processing. If it is not paid attention to or operated improperly, it is likely to deform and crack. Today I would like to share with you some experience of POM materials in machining, hoping to provide you with some ideas.

What is POM?

POM is a semi-crystalline engineering thermoplastic based on formaldehyde. Acetal (acetal), Polyxymethylene (POM), Polyacetal (polyacetal), Polyformaldehyde, Saigang, these are all its names. There are two kinds of common names: black and white.

This material has high mechanical strength and rigidity, good sliding characteristics (low friction coefficient), and excellent wear resistance. Because acetals hardly absorb water, they have excellent dimensional stability, and are the best choice for making complex shapes and precision machining parts.

However, it is unstable and easy to degrade under acidic conditions and high temperature. Because its molecule contains a large amount of oxygen, it is difficult to give it flame retardance. The continuous working temperature range is about – 40 ° C to 120 ° C.

Problems Easily Happened During POM Machining

Generally, the main problems encountered are processing deformation and cracking. There are also two common types of cracking. One is direct cracking during processing, and the other is hidden cracking (usually the cause of internal stress). It will be more troublesome to crack slowly after machining.

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