Mistakes To Avoid When Buying Used Nissei Injection Molding Machines



Selecting the right used Nissei injection molding machines is one of the most important criteria for creating efficient machining parts constantly and beneficially. This being a second-hand machine purchase, you need to look for a machine that will keep prices low and make you goo profit. The following are some of the mistakes that you should avoid if you do not want to end up with the wrong machine.

First and foremost, do not make the mistake of choosing a used Nissei injection molding machines that uses all-purpose screws. The primary benefit of all-purpose screws is that they can be used with most plastic materials, such as PP, PE, PET, PC and nylon.  For this reason, they are very adaptable and good for the molding companies that manufacture a wide range of materials. However, for a few materials, the component types as well as the efficiency rates of the all-purpose screws will be lesser compared to more superior injection casting screw designs, such as the barrier screw.

Another mistake you do not want to make looking for the right used Nissei injection molding machines to purchase is choosing large screw diameters. Sometimes, big screw diameters can lead to poor quality problems due to material degradation.  When small shot sizes are used with big screw thickness, the plastic material takes a lot of time to get warmed by the barrel heaters as compared to large shot sizes.

Material degradation is more likely to happen if the shot size is smaller compared to the maximum shot capacity of the injection unit, particularly for heat sensitive materials.  Another issue with large screw thickness is the big shearing forces that are produced during screw rotation. These shearing forces can break down the material and lead to reject parts.

For more information on the mistakes to avoid when buying used Nissei injection molding machines, visit our website at http://www.premierplasticsnj.com


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