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Precision Molding Solutions by Nagatsu: Achieving Complex Internal Geometries via Single-Shot "Collapsible Core" Technology

Nagatsu Precision Mold Co., Ltd.
Precision molded camera components enabled by high-accuracy mold technology

Precision molded camera components enabled by high-accuracy mold technology

Zero Secondary Machining. Zero Assembly. Revolutionize Your Costs and Quality with One-Shot Molding.

As devices become smaller and more advanced, engineers in the optical and medical fields face a critical challenge: How to produce complex internal undercuts and O-ring grooves without skyrocketing costs.
Nagatsu Precision Mold answers this with our proprietary collapsible core technology. Born from our heritage in micron-level optical component manufacturing, we consolidate complex geometries, which traditionally required expensive secondary cutting or multi-part assembly, into a single finished molded unit. This eliminates the need for post-processing, thereby eradicating risks like burrs and dimensional variance at the source. The result is a streamlined process that delivers drastically reduced lead times, absolute quality consistency, and superior cost performance.

Lens Barrel Component Utilizing High-Precision Collapsible Core Molding

Lens Barrel Component Utilizing High-Precision Collapsible Core Molding

Bringing Optical-Grade Precision to the Next Generation of Medical Device Manufacturing

Our strength lies in a vertically integrated system that covers everything from initial mold design to mass production. We transfer the uncompromising standards of camera lens barrel manufacturing, requiring 0.01mm roundness and coaxiality, directly to medical device components, setting a new standard for stability.
While many manufacturers still rely on risky secondary processing to form internal threads and grooves, we solve these geometries entirely inside the mold using our collapsible core mechanism. By removing secondary steps, we simplify your supply chain and eliminate process-related risks. As your technical partner, we leverage our extreme optical precision to minimize the workload and maximize reliability in medical device manufacturing.
One-shot molding achieved purely through injection molding

One-shot molding achieved purely through injection molding

Case Study: Cutting 1 Hour of Machining Time to Zero. Custom Collapsible Cores for True Integration.

The Challenge: A medical device manufacturer was facing a productivity crisis, spending one full hour per unit on secondary machining for internal O-ring grooves. The Solution: Nagatsu stepped in at the design phase. Where off-the-shelf components failed, we engineered a bespoke collapsible core tailored to their specific geometry, enabling complete molding in a single shot. The Result: Secondary machining was completely eliminated, generating 30 million JPY in annual cost savings. By simplifying the manufacturing process, we not only cut costs but also stabilized quality. Because we understand the entire lifecycle from design to mass production, we turn the "impossible" geometry into a production reality.
Proprietary Collapsible Core Mold Structure Designed In-House

Proprietary Collapsible Core Mold Structure Designed In-House

Partnership from the Design Phase: Ensuring Quality and Speed to Market

Why do clients choose Nagatsu? Because we act as a development partner, not just a supplier. By integrating our mold expertise into your initial designs, we prevent mass-production issues before they occur, ensuring both stable quality and the shortest possible delivery times. Our global structure further supports your growth: we design and build precision molds in Japan, then deploy them to our own facilities in China and the Philippines for mass production. This ensures you receive Japanese quality standards with the scalability and speed of global operations. We are the technical partner you need to accelerate your time-to-market and bring your vision to life.

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