Apparatus and method for manufacturing bolt to which fiber-reinforced plastic material is applied

The bolt manufacturing apparatus optimizes rolling conditions for fiber-reinforced plastic materials, addressing fiber disruption issues and enhancing fastening strength and reducing weight, achieving high fastening force and minimizing defects.

WO2026121558A1 Publication Date: 2026-06-11HWASHINBOLT IND
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HWASHINBOLT IND
Filing Date
2025-10-24
Publication Date
2026-06-11

AI Technical Summary

⚠Technical Problem

Conventional bolt manufacturing methods using fiber-reinforced plastic materials disrupt the continuity of fibers during machining, leading to reduced fastening force and stiffness, and existing methods fail to optimize rolling conditions for forming screw threads effectively.

⚗Method used

A bolt manufacturing apparatus and method that applies optimal rolling conditions, including controlled mixing of fiber-reinforced plastic materials, warm rolling at 100 to 200°C, and precise control of rolling die speed and depth to form screw threads, minimizing die load and breakage.

🎯Benefits of technology

The method produces bolts with enhanced fastening strength and reduced weight, achieving a fastening force of 1 kN or more, while minimizing defects and die breakage, and enabling mass production of high-hardness bolts.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to an apparatus and a method for manufacturing a bolt to which a fiber-reinforced plastic material is applied, and, more specifically, comprises: a mixing unit for mixing a raw material with a fiber reinforcement; and a thread rolling unit for thread-rolling the raw material mixed with the fiber reinforcement by the mixing unit, wherein the thread rolling unit includes: a holding unit for fixing the raw material; and a thread rolling die, which rotates and is transferred to the holding unit so as to form threads on the surface of the raw material.
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