Processing Capabilities

Our CNC turning department specializes in producing high-precision cylindrical mold components, including core pins, ejector pins, guide pillars, and bushings. Utilizing advanced CNC lathes equipped with live tooling capabilities, we achieve exceptional concentricity and diameter tolerance control down to ±0.005 mm. Whether using hardened tool steel or non-ferrous alloys, our automated strip feed system ensures consistent quality and surface finish from prototype to full-scale production. Complex contouring, groove, and threading can be completed in a single setting, reducing operational errors and maximizing productivity to meet your stringent requirements for critical mold bases and components.

From complex 3D mold cavities to planar templates with precision grooves and locating pin holes, our CNC milling capabilities form the foundation for high-quality injection and stamping dies. Equipped with high-speed machining centers and advanced CAM software, we maintain tight geometric tolerances while efficiently removing material. Our three-axis and four-axis milling processes are ideal for creating complex core and cavity geometries, sliding features, and cooling channels in a wide range of materials, from P20 to hardened H13 steel. Our milling services prioritize surface integrity and sharp edge cleanliness, reducing the need for extensive bench work and secondary finishing.

In mold making, flatness and parallelism are paramount. Our surface grinding division delivers mirror-like finishes and micron-level precision for all critical parting lines, slides, and gasket surfaces. Utilizing high-capacity precision grinders, we typically achieve flatness control within 0.002 mm and surface roughness as low as Ra 0.2 microns. This ensures perfect sealing of injection molds and precise closure height control in stamping dies. Our process controls eliminate grinding burns and microcracks, maintaining the integrity of the tool steel matrix, thereby extending mold life and ensuring reliable performance under high clamping pressures.

For mold components requiring submicron roundness and precise diameter—such as ejector pins, guide pins, and core pins—our external cylindrical grinding service is essential. We achieve precise diameter tolerances and ultra-smooth surface finishes through extremely precise control of workpiece rotation and wheel feed. This process is crucial to ensuring that components slide easily in bushing fits without jamming or flash penetration. Our grinders can machine hard chrome-plated surfaces and solid carbide shafts, providing the concentricity required for durable, high-cycle injection and stamping die operations.

Optical grinding (PG) is our flagship technology for producing ultra-precision, irregularly shaped punches and mold inserts. Our skilled technicians use a 50x optical projection screen to trace and grind complex contours with unparalleled precision, directly from DXF drawings of 2D CAD data. This low-stress machining method is ideal for tungsten carbide and high-speed steel components, eliminating the heat-affected zone issues associated with wire EDM. Our profile tolerances are maintained at ±0.002 mm, achieving sharp, burr-free cutting edges that maximize punch life and improve stamping quality for high-precision connectors, lead frames, and integrated circuit packaging dies.

When die designs require complex cavities, sharp internal angles, or extremely precise fine pin holes, wire EDM machines are the optimal solution. Our positioning accuracy is maintained within ±0.002 mm, providing superior surface finishes that are ready for assembly. Whether for multi-cavity templates or complex ejector inserts, our wire EDM capabilities ensure perfect alignment and seamless ejector system performance.

For die features inaccessible to rotary cutters—deep, narrow ribs, sharp internal angles (0.1 mm or less), and complex textured surfaces—our CNC EDM division provides the perfect solution. We utilize internally precision-machined graphite and copper electrodes to etch hardened steel cavities via controlled electrical discharge. This process enables the creation of complex mold details without tool deviation or chatter. With multi-axis trajectory capabilities, we achieve uniform spark gap and excellent surface uniformity, making it an indispensable part of high-precision plastic injection molds and die-casting molds.

CNC machining, or numerical control machining, utilizes computer-controlled digital units for automated machining. It is suitable for machining complex surfaces of mold components, offering advantages such as stable machining quality, high precision, and high repeatability. Yize Mold's CNC achieves three-axis linkage machining with a positioning accuracy of ±0.002mm, a high-speed spindle, and a rigid tool magazine, enabling high-speed, high-precision milling of complex three-dimensional contours.