A prefabricated shield segment production mold with rapid demolding
By setting up a top material mechanism and a flipping structure for the production mold of tunnel segments, the problem of low demolding efficiency was solved, and rapid demolding and improved sealing were achieved, thereby increasing work efficiency and mold life.
CN122323367APending Publication Date: 2026-07-03CCCC FIRST HIGHWAY ENG BUREAU GANGFA (JIANGSU) CONSTR TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CCCC FIRST HIGHWAY ENG BUREAU GANGFA (JIANGSU) CONSTR TECH CO LTD
- Filing Date
- 2026-03-26
- Publication Date
- 2026-07-03
AI Technical Summary
Technical Problem
Existing precast tunnel segment production molds are prone to problems such as sticking, corner chipping, and honeycomb pitting during demolding, resulting in low demolding efficiency.
Method used
The shield tunnel segment side mold is moved by a pusher mechanism and a tilting structure, driven by a drive motor to move the bidirectional screw and gear system. Combined with the pusher rod and wedge block structure, the shield tunnel segment can be demolded quickly, and the sealing structure improves the sealing between the molds.
Benefits of technology
It enabled rapid demolding of tunnel lining segments, improved demolding efficiency, prevented leakage and concrete loss, and extended the service life of the mold.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122323367A_ABST
Abstract
This invention relates to the field of shield tunnel segment production technology, and provides a prefabricated shield tunnel segment production mold for rapid demolding. The mold includes a shield tunnel segment mold base, with shield tunnel segment end molds installed on both sides of the top of the mold base, and shield tunnel segment mold cavities formed on the end molds. Side shield tunnel segment molds are installed at both ends of the top of the mold base. The invention utilizes a top-feeding mechanism. A drive motor starts and rotates forward, causing a bidirectional screw to rotate. A second gear drives a first gear to rotate, and a fixed screw rotates. A movable frame moves the side shield tunnel segment molds away from the end molds. A support frame drives a rack to move towards an upward wedge. The rack drives a small gear to rotate, which in turn drives a large gear. A rotating shaft rotates the top shield tunnel segment mold, opening the mold. Simultaneously, a lower wedge moves towards an upper wedge, pushing the upper wedge upward. The top-feeding rod ejects the shield tunnel segment from the mold cavity, achieving rapid demolding.
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