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Mirror EDM Core Inserts | Precision Tooling for Unscrewing Bottle Cap Molds
Product Overview
Senlan Precision manufactures plastic mold core inserts produced by electrode (EDM) processes for rotatable plastic bottle cap tooling. Built strictly to customer drawings (OEM / Built-to-Print), these core inserts are designed for complex internal geometries, stable rotational interfaces, and consistent dimensional control required in multi-cavity injection molds.
Key Features & Technical Advantages
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EDM (electrode) machining for complex profiles and sharp internal features
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Stable dimensional accuracy for rotatable cap mechanisms
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Suitable for high-cavity bottle cap injection molds
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Controlled surface integrity after EDM and finishing
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Compatible with various die steel and stainless steel grades per drawing
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Optimized for repeatable assembly and maintenance
Application Scenarios / Industry Applications
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Rotatable plastic bottle cap injection molds
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Packaging closures and functional cap systems
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Multi-cavity cap molds requiring precise core geometry
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Mold core inserts for threaded or rotating components
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High-output packaging production lines
Mold Structure & Design Description
The EDM-processed core insert is typically used as the functional core element forming internal or rotational features of the bottle cap. Based on the mold design, the insert interfaces with sleeves, cavities, or rotating mechanisms. EDM allows precise reproduction of complex contours that are difficult to achieve through conventional milling, ensuring consistent part performance during high-cycle molding.
Manufacturing Capability & CNC Machining Capacity
Senlan Precision operates a complete precision manufacturing workflow:
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MAKINO high-precision CNC machining centers (Japan)
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HARDINGE CNC turning machines (USA)
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CNC milling, wire EDM, sinker EDM (electrode processing)
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Precision grinding and controlled heat treatment coordination
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Typical achievable tolerances: ±0.003 mm to ±0.01 mm, depending on structure
Custom Development / OEM Cooperation Process
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Customer drawing and technical requirement review
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Material selection and EDM feasibility evaluation
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Electrode design and EDM machining
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CNC finishing and precision grinding (if required)
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Dimensional inspection and quality verification
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Export packing and delivery
All components are produced strictly according to OEM / Built-to-Print specifications.
Quality Control & Export Experience
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Incoming material inspection with traceability
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In-process dimensional control during EDM and CNC stages
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Post-processing inspection for critical features
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Final inspection before shipment
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Stable export experience supporting international mold manufacturers
Related Products Recommendation
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Plastic mold cavity inserts
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Threaded core inserts and rotating cores
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Core pins and ejector components
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Custom injection mold spare parts
FAQ – Technical & Procurement
Q1: Why use EDM for rotatable bottle cap core inserts?
EDM enables accurate machining of complex internal shapes and sharp features that are difficult to achieve by conventional cutting.
Q2: Are these inserts supplied as standard parts?
No. All products are custom-manufactured to drawings (Built-to-Print).
Q3: What materials can be used for EDM core inserts?
Common options include die steel and stainless steel grades specified by the customer.
Q4: Are these inserts suitable for multi-cavity molds?
Yes. They are widely used in high-cavity bottle cap injection tooling.
Q5: Do you support export documentation and packing?
Yes. All shipments are prepared for international export requirements.
Get a Quote
For pricing or technical consultation on EDM-processed plastic mold core inserts for rotatable bottle cap tooling, please contact Senlan Precision with your drawings or specifications. Our engineering team will provide a precise OEM manufacturing proposal.