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Established in 1983, Mec-Plast S.a.s. specializes in the design and construction of injection molds, mainly for solenoid valves and pneumatic components.
Mec-Plast has been in the moldmaking and injection molding business for over 35 years. The company is a model of Italian excellence, gradually expanding to the current organization with nine employees guided by owner Ivan Missaglia and his father, who founded the company in 1983.
Mec-Plast specializes in small and miniature technical parts, especially for solenoid valves and pneumatic components. The company offers turnkey service from feasibility studies, through design proposal and quote, up to mold construction and injection molding operations.
“Our portfolio includes solenoid valves of different sizes, mainly 10, 15 and 22 millimeters,” Ivan Missaglia says. “These components are very small and require tolerances within few hundredths of a millimeter. That’s why the customer relies on our experience and expertise, submitting a drawing of the part to be checked by our engineers who study its feasibility and possible actions for modification and optimization.”
Throughout its history, the company has experienced the technological evolution of design tools from drawing boards to 3D CAD software to CAD/CAM integration. In 2002, Mec-Plast became one of the early adopters of the new NX 3D design suite and eventually expanded its development tool-set with the addition of NX Mold Wizard and NX CAM.
“In the typical process, customers submit STEP files from different CAD packages,” Missaglia explains. “Our engineers import these files into NX to execute feasibility studies with mold-specific tools that check draft angles and undercuts. NX Mold Wizard provides moldability analysis tools that help us create a reliable and detailed offer, including all costs for mold and tooling. Another key feature of NX is that it supports an integrated end-to-end process with full data associativity. “As CAD and CAM are tightly integrated, the entire process is updated automatically after each change, from the 2D drawing to the 3D assembly and the toolpath,” Missaglia adds.
The analysis performed by Mec-Plast may also include injection process studies using the Moldex3D application integrated in NX, a third-party solution sold by Siemens. “In some cases, we also carry out structural analysis on the plastic component to check deformation,” Missaglia adds. “For instance, we have recently applied the customer-specific compression load to a molded part to check possible deformation. This type of analyses uses the CAE features included in the NX package and enables us to provide consulting services to customers.
Once the 3D model of the mold has been defined, the next step is the generation of toolpaths using NX CAM, which can handle all necessary machining operations, including 5-axis milling, die-sink and wire-cut EDM and turning. “The Siemens software has always kept up with the pace of technological evolution, adding features for the new generation of 5-axis machine tools,” Missaglia says.
NX includes a virtual machining capability that enables NC programmers to perform kinematic simulations that directly use the machine and controller models and machining code to check for possible collisions and clashes before starting the machining process. These features are essential for safety and efficiency, enabling Mec-Plast engineers to check the G-code file of the machining process that will be executed by the machine tool for reliable simulation. The simulation results accurately reflect the post-processed numerical control code in its native format. Normally, the postprocessor applies modifications approved by the customer, so simulating the operation of 5-axis machines after postprocessing helps assure total safety.
“The unified interface of NX offers great ease-of-use, meaning that it is very easy for our mold engineers to change drafts and all geometric parameters to make sure that a part can be injection molded,” Missaglia says. “Some CAD software can be complicated when the designer has to deal with non-native geometries, but this is not an issue with NX and synchronous technology. With NX, you always find a way, anything you design can be machined. With other CAD packages, there is no way to modify imported files and you often have to rebuild the model from scratch.”
Mec-Plast routinely handles complex sur-faces that require high-quality geometry. “Our molds have intricate surfaces due to very strict tolerances,” Missaglia says. “NX offers an ideal solution with its advanced tools for surface modeling.
Since 2010, Mec-Plast has been supported by Team3d, a Siemens Platinum solution partner with a team of engineers that can address all possible customer requirements. “Our designers and engineers can rely on extensive technical support pro-vided by Team3d,” Missaglia says. “The company’s help desk is always accessible for any problem or daily request. For very complex specific situations, we have been supported directly by Team3d specialists coming to our offices.”
To an expert and qualified customer like Mec-Plast, Team3d primarily offers advanced consulting services to optimize postprocessors and machine tool operations. “We are proud to collaborate with a smart and specialized organization that makes the most of the technology it has adopted,” says Antonio Martinelli, Sales Director of Team3d. “For us, Mec-Plast is a tangible example of the benefits you can obtain by implementing a fully integrated suite with all the solutions offered by Siemens, from analysis to design to machining.”