Will TPU injection molds wear out?

Will TPU injection molds wear out?

TPU injection molds do wear during use, which is the result of a variety of factors.

The following is a detailed analysis of TPU injection mold wear, mainly including 3 aspects:

(1) TPU material itself has some unique physical and chemical properties, such as its wide hardness range, high mechanical strength, outstanding cold resistance. However, these characteristics also mean that the mold needs to withstand greater pressure and friction during injection molding. Long-term, high-intensity use will lead to gradual wear of the mold surface, and even small cracks or depressions may appear.

(2) Some operating factors in the injection molding process will also affect the wear of the mold. For example, insufficient drying of raw materials, incomplete cleaning of cylinders or improper processing temperature control may lead to additional damage to the mold during injection molding. In addition, the accuracy and stability of the injection molding machine will also affect the service life of the mold. If the accuracy of the injection molding machine is not high or the operation is unstable, it will cause the mold to be subjected to uneven force during each injection molding process, thus accelerating the wear of the mold.

(3) The maintenance and maintenance of the mold is also an important factor affecting its wear. If the mold is not maintained and maintained in time during use, such as not regularly cleaning the residue on the surface of the mold, not regularly lubricating the mold and anti-rust treatment, it will lead to increased wear of the mold.

In order to reduce the wear of TPU injection molds, we can take the following measures, including 3 aspects:

(1) Strictly control the quality and dryness of raw materials to ensure that the purity and dryness of raw materials meet the requirements to reduce the damage of impurities and water to the mold during the injection process.

(2) Clean and maintain the mold regularly, remove the residue and rust on the surface of the mold in time, and keep the mold clean and lubricated.
Optimize the injection molding process parameters, such as adjusting the processing temperature and nozzle temperature, to reduce the pressure and friction of the mold during injection molding.

(3) Improve the accuracy and stability of the injection molding machine, ensure that the mold is subjected to uniform force during each injection molding process, and reduce the wear rate of the mold.

To sum up, TPU injection molds do suffer from wear during use, but through reasonable operation and maintenance measures, the service life of the molds can be effectively extended and production efficiency and product quality can be improved.