Ejector Pins & Sleeves are the heart of the mold expulsion system. Our components are engineered from premium hot-work steels and undergo advanced vacuum nitriding to ensure flawless part ejection even in the most demanding high-speed production environments. We focus on reducing friction and maximizing tool life for global mold makers.
Our precision Ejector Pins & Sleeves are essential components for high-performance injection molds. We offer a comprehensive range of standard and custom Ejector Pins (Pinos Extratores) and Ejector Sleeves (Buchas de Extração / Camisas de Extração) designed to meet strict DIN 1530 and JIS standards.
Whether you need Flat Ejector Pins, Shouldered Pins, or high-precision Ejector Sleeves for complex mold designs, our products ensure smooth ejection cycles and long service life. We specialize in manufacturing from SKD61 and H13 steel with advanced nitriding treatments, serving professional toolmakers in Brazil, Portugal, and worldwide.
Custom sizes are available according to your technical drawings.
What is Core Pins ？ Core pins are integral components in injection molding and die casting, used to create internal cavities and shapes in molded parts. They play a vital role in defining the part’s dimensions and features. Gunri offers precision-engineered core pins designed to meet the intricate requirements of molding applications. Our core pins…
What is Ejector Pins ？ ejector pins are essential components in injection molding and die casting processes. They are used to eject molded parts from the mold cavity, ensuring smooth and efficient production. Gunri offers high-quality steel ejector pins crafted from premium materials for enhanced durability and performance. Our precision manufacturing process ensures accurate dimensions…
Custom-made Flat Ejector Pins (also known as Blade Ejector Pins) designed for narrow ribs and deep slot ejection. Our Pinos Extratores Laminares are manufactured from premium SKD61/H13 steel with high-quality nitriding for superior wear resistance.
Precision: ±0.002mm
Customization: Based on your technical drawings.
Professional Sprung Core Solutions for Internal Undercuts
Factory Direct: Professional manufacturer offering OEM/ODM & custom machining services.
High Compatibility: 100% interchangeable with Cumsa, HASCO, and MISUMI standards.
Space-Saving: The ideal solution for releasing internal grooves and undercuts in compact mold designs.
High-performance Ejector Sleeves (Camisas de Extração) designed for reliable part ejection in multi-component molds. Perfectly matched with our center pins for seamless operation.
Material: SKD61 / H13
Hardness: Surface 900-1100 HV
Standard: DIN 1530-D / JIS
What is Rectangular Ejector Pins ？ Rectangular ejector pins are essential components in molding and casting processes, designed specifically to eject parts with flat or rectangular surfaces from molds. They play a critical role in ensuring efficient part ejection. Gunri specializes in providing high-quality rectangular ejector pins that are meticulously crafted for precise part ejection….
High-precision Shouldered Ejector Pins designed for increased stability and strength in injection molding. These Pinos Extratores com Ressalto (Stepped Pins) are ideal for small diameter ejection requirements where extra support is needed at the base.
Type: Stepped / Shouldered Design
Service: OEM Customization according to your drawings.
Automotive Industry: Reliable ejection for large structural parts and intricate interior trim components.
Consumer Electronics: Ultra-thin pins for smartphone housings and high-precision micro-connectors.
Medical Devices: Mirror-polished pins for cleanroom-grade medical disposables and surgical tools.
A: SKD61 (H13) offers superior heat resistance and can be nitrided, making it ideal for high-temperature injection molding. 65Mn is a cost-effective choice for simpler, low-temperature molds with shorter production runs.
A: We use high-precision internal grinding and vacuum heat treatment to ensure a perfect clearance. For extreme cases, we offer DLC coatings or self-lubricating treatments to eliminate oil contamination.
A: Yes, we provide full customization services including flat pins, stepped pins, and pins with specific head shapes based on your 2D/3D technical drawings.
We give value to the excellence and top class engineers, but in terms of accurate service.
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