Non-Magnetic WC-Ni Alloy Precision Gate Inserts with Precision Multi-Angle Taper

Achieve clean automatic degating with our non-magnetic carbide nozzle pinpoint gates. Precision-machined WC-Ni alloy with multi-angle tapered bores for optimal flow. Perfect for magnetic-sensitive molding applications. Custom sizes available.

In high-performance injection molding, the nozzle gate is where material transitions from machine to mold—and where part quality is ultimately determined. For applications demanding automatic degating, minimal gate vestige, and absolute magnetic neutrality, conventional steel gates present significant limitations. Our Non-Magnetic Carbide Nozzle Pinpoint Gates represent the optimal fusion of advanced material science and precision flow engineering. Manufactured from specialized WC-Ni (Tungsten Carbide-Nickel) alloy, these gate inserts deliver exceptional wear resistance, zero magnetic interference, and precisely engineered flow characteristics for demanding molding operations.

By utilizing a nickel-based binder system instead of conventional cobalt, our gates are completely free of ferromagnetic elements. This fundamental material innovation delivers:

• Zero magnetic attraction to ferrous particles, preventing contamination in cleanroom environments
• No interference with magnetic fields—essential for molding ferrite components, magnetic polymers, and MRI-compatible medical parts
• Complete compatibility with sensitive electronic and medical device manufacturing

Our nozzle pinpoint gates feature meticulously engineered conical bores optimized for material flow and automatic degating:

• Primary taper: Typically 3° to 5°, providing gradual material acceleration and controlled pressure drop
• Secondary taper: Steeper angle (typically 40°) near the orifice for high shear rate to reduce apparent viscosity of polymer melts, clean consistent gate break-off during ejection, and minimal gate vestige on finished parts

Advanced EDM and precision polishing techniques achieve exceptional surface quality:

• Internal bore finish: Ra 0.8 μm (standard), ensuring smooth material flow and preventing degradation
• External finish: Ra 0.2 μm mirror polish, providing corrosion resistance and professional aesthetics
• Smooth transitions: No sharp edges to cause material hang-up or flow marks

With hardness of 90-92 HRA, these inserts withstand the high shear forces and abrasive flow of glass-filled polymers and engineering plastics far better than tool steel—maintaining consistent gate geometry over millions of cycles.

Injection molding with pinpoint nozzle gates offers unique benefits, and our carbide construction amplifies these advantages:

• Automatic Degating: The small, tapered design allows the gate to shear cleanly during ejection, eliminating secondary trimming operations
• Minimal Gate Vestige: Leaves only a tiny mark on finished parts—critical for cosmetic applications
• High Shear Rate: The restricted flow creates beneficial shear heating, reducing viscosity for easier filling of thin-wall sections
• Multi-Cavity Uniformity: Precision machining ensures consistent flow characteristics across every cavity

We understand that every molding application is unique. Our non-magnetic carbide nozzle pinpoint gates can be customized with:

• Specific orifice diameters for your material and part geometry
• Optimized taper angles based on flow analysis
• Special mounting configurations (flanged, stepped, or threaded)
• Enhanced surface finishes for critical optical applications