Scientific Achievement Registration: Large-Sized Municipal Underground Cable Duct Through-Hole Mold

The Zhejiang Provincial Department of Science and Technology, as the highest administrative authority for S&T work in the province, is responsible for organizing and implementing S&T achievement registration. S&T achievement registration is an important part of S&T achievement management, implemented in accordance with the “Measures for S&T Achievement Registration” (Guo Ke Fa Ji Zi [2000] No. 542). All research projects that have passed appraisal, acceptance inspection, or have obtained patents may apply for registration. Registered S&T achievements are uniformly numbered by the Zhejiang Provincial Department of Science and Technology and, after public announcement, are issued an S&T Achievement Registration Certificate. This certificate is a required attachment for applying for the Zhejiang Province S&T Award and is also an important basis for enterprises to qualify for High-Tech Enterprise, Technology-Based Enterprise, High-Tech Enterprise R&D Center, and other qualifications. This achievement is a specialized mold technology in the municipal infrastructure field, with broad market prospects in the context of the comprehensive advancement of new-type urbanization construction and urban utility tunnel projects. Zhejiang SINOMOULD Co., Ltd.’s independently developed “Large Buried Cable Conduit Injection Mold for Municipal Engineering” was registered as an S&T achievement by the Zhejiang Provincial Department of Science and Technology. This technological achievement breaks through the design and manufacturing difficulties of large-scale geotechnical pipe molds and solves technical challenges in large-size product injection molding such as melt filling, cooling uniformity, and demolding stability, signifying that SINOMOULD’s technological breakthrough in the field of large precision injection molds has received provincial-level authoritative certification.

Technical Difficulties and Breakthroughs of Large Buried Conduit Molds

Large buried cable conduits for municipal engineering are key infrastructure components of urban underground pipeline network systems for power and communication, used for protecting cable and wire routing and allowing the insertion and replacement of wires and cables. They are widely applied in fields such as urban utility tunnels, power engineering, transportation, and urban construction. With the comprehensive advancement of urban underground utility tunnels and new-type urbanization construction, demand for large buried cable conduits continues to grow, placing higher requirements on the large-scale, precision, and high-efficiency aspects of injection molds.

The technical difficulties of large buried cable conduit molds are mainly manifested in three aspects: first, the long melt filling path during large-size product injection molding, making unbalanced filling and pressure loss likely; second, the high requirements on cooling uniformity imposed by large-size product wall thickness distribution — uneven cooling can easily cause product warping and deformation; third, the high difficulty of demolding large pipe fittings and the complexity of core-pulling mechanism design. SINOMOULD’s R&D team systematically solved these technical challenges through structural innovation and process optimization.

In mold design, the core innovation of this technological achievement lies in the runner design and thermal balance analysis for large structural parts. The R&D team optimizes gate position and runner layout to ensure uniform melt filling in large-size cavities, avoiding product defects caused by flow imbalance. At the same time, through precise cooling channel design and thermal balance analysis, uniform mold cavity surface temperature distribution is achieved, effectively controlling the cooling shrinkage and deformation of large-size products.

In injection molding, this technological achievement optimizes high-tonnage injection process parameters tailored to the characteristics of large buried conduit products. By using mold flow analysis software to conduct simulation verification of the entire process of filling, holding pressure, and cooling, it ensures the dimensional precision and mechanical properties of large-size products during the injection molding process. The successful injection molding of large-size products demonstrates SINOMOULD’s systematic technical capability in the field of large precision injection molds.

Mold Manufacturing and Quality Control Assurance

The manufacturing of large buried cable conduit molds places extremely high demands on processing equipment and assembly precision. The machining precision of large mold bases, the fitting accuracy of core-pulling mechanisms, and the positioning accuracy of cooling channels directly determine the mold’s service performance and product quality. In mold manufacturing, SINOMOULD relies on high-precision CNC processing equipment and a systematic precision manufacturing process system to ensure the machining precision and assembly quality of large mold components.

In quality control systems, SINOMOULD has passed ISO9001 Quality Management System certification and IATF 16949 Automotive Industry Quality Management System certification, establishing a full-process quality control system covering mold design review, processing process monitoring, and assembly, commissioning, and inspection. Each large buried cable conduit mold undergoes strict trial mold verification and dimensional inspection before delivery, ensuring that the filling balance, cooling uniformity, and demolding stability of the mold meet design requirements, providing customers with stable and reliable production assurance.

Customer Value: Important Equipment Support for Urban Underground Utility Tunnel Construction

For municipal engineering customers, the dimensional precision and mechanical properties of large buried cable conduit products directly affect the quality and service life of urban underground pipeline network projects. SINOMOULD’s “Large Buried Cable Conduit Injection Mold for Municipal Engineering” technological achievement, by breaking through the design and manufacturing difficulties of large geotechnical pipe molds, ensures the dimensional precision and mechanical properties of large cable conduit products. This technological achievement has broad market prospects in the context of the comprehensive advancement of new-type urbanization construction and urban utility tunnel projects, serving as important equipment support for urban underground utility tunnel construction.

According to the management requirements of the Zhejiang Provincial Department of Science and Technology, the S&T Achievement Registration Certificate is a required attachment for applying for the Zhejiang Province S&T Award, and registered achievements are incorporated into the provincial S&T achievement database for unified management. SINOMOULD will continue to advance in-depth R&D and industrialization of large precision injection mold technology, consolidating its technological leadership position in the field of municipal engineering molds.