Parts that become more and more complex with increasingly deep cavities as well as moulded and reinforcement ribs in plastic injection moulds and pressure die casting moulds necessitate the use of extra long tools with diameters that can be very small. Complex part geometries and various material characteristics place the highest demands on machining and tool life.
For designing, engineering and constructing medium- and large-sized cold forming tools, cast iron is often used due to material properties such as compressive strength and easy machinability. The main components here are mould plates and mould inserts. Here, MAPAL has a lot of experience with milling (2D and 3D) and drilling operations (drilling, reaming, thread cutting).
When it comes to pre-series or prototype moulds, it is not unusual to use materials that are easy to machine. Aluminium alloys or uriol (plastics) are often used. In these cases, solid carbide tools with positive and partly polished cutting edges, or better still, PCD-tipped tools ensure high productivity and short machining times.
In the die & mould sector, the manufacture of increasingly complex forms is part of everyday life. Continuous further developments in machine tools and CAM software raise performance and productivity to an ever higher level. The tools used must therefore always be state-of-the-art. To achieve optimum results, each design starts with a process analysis.
Mould inserts also have machining tasks that are required for casting or various attachment parts. Users are increasingly machining open pockets (circumferential machining) using trochoidal milling. This machining method helps to optimise machining times and to extend tool life.
Closed pockets are usually produced by roughing in Z planes. When milling, a ramp is often selected as the machining entry. The tool selected depends on the depth of the walls and the mould incline to be generated on the component. MAPAL’s broad portfolio with modular systems also covers the machining of deep pockets with large diameters.
A major focus in milling operations is on reducing the machining time. With specific tool geometries for machining closed, round pockets, it is often possible to eliminate the pre-drilling process. With helix milling, milling paths are programmed with helical entrances that are suitable for pocket dimensions.
Operations to create even surfaces occur very frequently and in different areas in the die & mould sector: It could be component-related, strategy-related due to the respective milling process or due to requirements for mould closing surfaces as well as sections and cutting dies. The right tool is then selected depending on the application and requirements.
Plastic injection moulds and die casting moulds often have ribs and thin walls. Ribs, for example, are increasingly being milled, as this process is more cost-effective than EDM (spark eroding). As a rule, long or extra-long carbide tools with small diameters are used. Customer-specific solutions (RibCutter) to match the respective rib shape are also possible here.
There is a wide range of full bore operations in the die & mould sector: From large bores for guide pillars and deep bores for the cooling system to high-precision bores for ejector pins. MAPAL offers a comprehensive portfolio of drilling and reaming tools for the individual production steps.
Optimised purchasing management is important for a clear organisation of the tool stock.
2. Tool logistics
Cost-effectiveness even in the periphery of machining: Intelligent dispensing systems significantly reduce non-productive times.
3. Engineering
The machining specialists provide support with process engineering, e.g. in the form of CAM simulations, general advice and the development of economic machining strategies.
4. Measuring and setting
Reliable setting and measuring devices are convincing due to their accuracy and user-friendly operation when setting the tools.
5. Tools and clamping technology
From the spindle to the cutting edge – MAPAL offers a wide range of tools and clamping technology for the die & mould sector.
6. Machining
Efficient machining processes and customised machining strategies at the highest technological level.
7. Digitisation and automation
Quick and easy digitisation: The c-Connect Box digitally transmits measurement data from the setting fixture to the machine tool. It also monitors the machine status among other things.
CORMOL from Portugal manufactures stamping tools, for which it has been working closely with MAPAL since 2022. With the OptiMill-3D-HF, CORMOL has found a reliable and economical tool solution.
The mouldmaking company Krämer+Grebe optimises production with MAPAL reamers and milling cutters and ensures process reliability in international competition.
