3D Printing-Based Utility Duct Cover, 3D Printing Manufacturing Method Thereof, and Multi functional Nozzle Unit for 3D Printing

The 3D printing-based utility tunnel cover with a surface layer and reinforcing layer, using a multi-functional nozzle unit, addresses the challenges of high production costs and weight by enabling customizable designs and safe transportation, thus improving manufacturing efficiency and safety.

KR103000349B1Active Publication Date: 2026-08-05DAEHAN CONSULTANTS CO LTD
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Patent Information

Application Number
KR1020260025782
Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2026-02-09
Publication Date
2026-08-05
Estimated Expiration
2046-02-09

AI Technical Summary

Technical Problem

Conventional utility tunnel covers made of reinforced concrete or cast iron face challenges such as high production costs due to shape and dimension changes requiring new formwork, heavy weight necessitating specialized equipment, and difficulty in addressing standard discrepancies or irregular openings, with 3D printing technologies not effectively applied for these applications.

Method used

A 3D printing-based utility tunnel cover with a surface layer and lightweight reinforcing layer, featuring inward grooves and longitudinal/transverse ribs, is manufactured using a multi-functional nozzle unit that includes a gripper-guide for easy transportation, eliminating the need for formwork and enabling customizable designs.

Benefits of technology

This approach simplifies manufacturing, reduces costs, enhances productivity, allows easy design changes, and ensures safe transportation and installation by reducing the weight and complexity of the covers, while maintaining high strength and visibility.

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Abstract

The present invention relates to a 3D printing-based utility tunnel cover and a method for manufacturing the same, which allows for the free realization of various shapes and dimensions without using a mold, as well as customized design and rapid manufacturing, and also involves manufacturing a utility tunnel cover, etc. by 3D printing by spraying material through a nozzle part and transporting the finished product using said nozzle part. The 3D printing-based utility hole cover (10) according to the present invention is manufactured by 3D printing to include a surface layer (11) having an overall uniform structure with inwardly concave grooves on both opposing sides, and a lightweight reinforcing layer (12) formed with an uneven structure having a handle groove on the bottom surface of the surface layer. The lightweight reinforcing layer includes longitudinal ribs (12a) arranged along the longitudinal direction in the center of the surface layer, and a plurality of rows of transverse ribs (12b) formed towards both the left and right sides centered on the longitudinal ribs and arranged at a certain interval from each other along the longitudinal direction. Among the transverse ribs, the spacing between the transverse ribs at positions corresponding to the handle groove of the surface layer is made large enough to allow a worker's finger to be inserted, thereby forming a finger groove.
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