Cut the Gate Before the Part Leaves the Mold — Clean, Precise Degating with a Collaborative Robot

Featured in Our Webinar: In-Mold Gate Cut System

Our patent-pending in-mold gate cut system combines an injection molding machine with a collaborative robot. The robot holds a gate-cutting jig inside the mold, and the gate is cut by the mold-closing motion. Parts are already degated when they are removed, ready for the next process.

• Zero post-processing: Eliminates manual gate cutting after molding.
• Minimal gate vestige: Approx. 0.02 mm, compared with approx. 0.2 mm for conventional manual cutting (based on our in-house trials).
• Clean cutting: Virtually no cutting particles were observed in a trial of approx. 3,000 shots with COP, making it well suited to cleanroom production.
• Safer operation: Cutting takes place inside the molding machine's safety guard, so operators never handle blades.

The system is designed for micro medical components, connectors and optical parts. Development for multi-cavity molds and a wider range of resins is underway.

Sayama Mold Manufacturing Co., Ltd. is a precision micro-mold specialist based in Iruma, Saitama, Japan. Since our founding in 1964, we have designed and built precision injection molds and provided injection molding services for demanding applications in the medical device, biomedical, optical communication, semiconductor and connector industries.

Our Strengths

• Micron-level precision: Mold component machining to ±1 µm, supported by skilled hand finishing.
• Micro-molding expertise: Proven results such as 0.08 mm pitch connectors and micro gears (module 0.025).
• Burr-free, easy-to-maintain molds: Fully hardened, fully split modular mold structures.
• One-stop support: Flow analysis and DFM, mold design and manufacturing, in-house mold trials and mass-production molding, including super engineering plastics and special materials.
• Certified quality: ISO 9001 and ISO 14001 certified.