In the cooling systems of injection molds and die-casting molds, Water Circuit Copper Plugs are essential sealing components used to close cooling channels, change water flow direction, or plug process holes. As a mold manufacturer that produces for our own use, we maintain extremely stringent standards for sealing performance, corrosion resistance, and installation convenience of copper plugs. Every copper plug undergoes precision machining and rigorous inspection to ensure no leakage, no loosening, and no corrosion during long-term high-pressure cooling water circulation.
Self-Produced and Self-Used, Rigorously Selected
We are not only a supplier of mold components but also a mold producer ourselves. Through extensive practical experience in our own molds, we have repeatedly validated the material selection, thread precision, sealing type, and pressure resistance of copper plugs. Only those with reliable sealing, convenient installation, and exceptional durability are approved for our supply system.
Premium Copper Material, Thermal Conductive and Corrosion Resistant
Our water circuit copper plugs are manufactured from high-quality brass or pure copper, offering excellent thermal conductivity and corrosion resistance. The copper material itself is resistant to rust, effectively withstanding erosion from impurities and chemical additives in cooling water, ensuring easy removal even after long-term use without seizing in the mold.
Precision Threads, Reliable Sealing
Plug threads are precision machined with complete thread profiles and smooth surfaces, ensuring tight fit with mold water channel holes. We strictly control the pitch diameter tolerance to ensure smooth installation while achieving excellent sealing performance, preventing high-pressure cooling water leakage.
Multiple Sealing Types, Adapting to Different Requirements
We offer copper plugs with various sealing structures to meet different operating conditions:
PTFE Tape Sealing Type: Standard thread structure, used with PTFE tape for conventional water circuit sealing
O-Ring Sealing Type: O-ring groove designed at thread root, equipped with O-ring seal, sealing achieved through compression deformation, suitable for high-pressure or frequent disassembly applications
Tapered Sealing Type: Using tapered thread or tapered surface compression structure, sealing achieved through metal contact deformation, suitable for high-temperature and high-pressure applications
Hex Socket Drive Type: Standard hexagon socket design for easy installation and removal with hex wrench
Pressure and Temperature Resistant, Stable Performance
Copper plugs can withstand water pressure tests above 1.5MPa, with an operating temperature range covering -20℃ to 200℃, fully meeting the conventional working conditions of mold cooling systems. Specially treated plugs can adapt to higher temperatures or more corrosive cooling media.
Complete Specifications, Customized Solutions
For standard specifications, we maintain regular inventory of metric (M6×1.0 to M20×1.5) and imperial (PT1/8 to PT3/4) thread sizes for quick dispatch. For non-standard customization, based on your mold water circuit design requirements, we offer custom copper plugs with special thread sizes, special lengths, special head types, and multi-stage combination plugs.
We Can Also Source for You
If you have requirements for water circuit copper plugs or other mold components, whether standard or non-standard, we can leverage our production experience and supply chain resources to select and procure the most suitable parts for you. We know molds, and we know components.
Contact us today for samples and a quotation.