For many years Maxi Melt is able to provide custom made screw profiles that take into account the specific needs of processed materials and improves competitiveness of our customers.
At the plasticizing proses, the screw together with the tip assembly is one of the most important components of the system as it allows a reproducible production cycle and determines the quality of the molded part.
The geometry of the screw is of primary importance if you want to increase productivity, increase the mechanical resistance of the products, create energy savings, reduce waste, reduce the use of masterbatches, improve the aesthetics: in other words optimizing the plasticizing process.
Thanks to its extensive experience in developing screws profiles and continuous research and technological innovation, the Maxi Melt can be YOUR PARTNER in optimizing your laminating processes by injection, extrusion.
Our help will allow your company to increase it’s competitiveness.
WHY ‘NEED A PARTICULAR PROFILE SCREW?
All polymers are excellent thermal insulators. The melting of the granulate takes time which is in contradiction with the productivity demands of a modern plasticizing process. For this reason most plasticizing screws are produced with high compression ratios to generate a enough friction to accelerate the melting process.
If the compression ratio is too high it can trigger the degradation processes in the compression zone which in time effects the quality of the end product with for example black spots, decreased mechanical property’s and visual appearance, obviously resulting in more scrap.
If the compression ratio is to low, there exists a real risk for unmelted particles and in the mixing zone (metering) the screw often fails to ensure a homogeneous melt.
So it’s not simple to develop a plasticizing screw with a geometry for all polymers. OEM’s often offer a standard universal screw with their machine. This so called universal screw is in practice not universal. It is often limited to some basic polymers and do not support the most delicate processes that require speed. Because Maxi Melt has the knowledge of plasticizing processes we can offer screws to optimize your production processes.