Meaning
Subtractive manufacturing methods that use rotary cutting tools or pantographs carve text, logos, or textures directly into the steel surfaces of injection moulds. Utilizing mechanical steel engraving allows mould makers to add permanent identification markings, recycle codes, or decorative patterns to the tool cavities. This process produces clean, deep recesses that are replicated on every moulded plastic part.
Tooling Modification
The cutting action of a micro-milling tool or an engraving bit removes steel along a pre-programmed path. In the production of durable plastic housings, mechanical steel engraving creates the raised lettering for safety warnings and brand logos. This method is preferred for deep, bold letters that must remain legible throughout the lifespan of the plastic product.
Unlike laser marking, it can easily reach deep into complex cavity geometries without requiring specialized optical setups.
Mould Durability
The physical depth of the engraved lines ensures that the markings do not wear away during high-volume production runs. This durability is necessary when moulding glass-filled resins that are highly abrasive to steel surfaces.
Process Limit
The minimum size of the engraved features is limited by the diameter of the mechanical cutting tool, which rarely goes below zero point two millimeters. For extremely fine textures or micro-scale lettering, alternative texturing methods such as chemical etching or laser engraving must be used. Choosing the correct engraving technique depends on the required detail, the mould material, and the production volume.