Mould

For high-volume production (over 500,000 cycles), you must prioritize high-hardness and wear-resistant steel. For plastic injection, H13 or S136 stainless steel is recommended to prevent corrosion and ensure a mirror finish. For die casting, 8407 or SKD61 steel is essential to withstand thermal fatigue. Always request a Steel Certificate from the supplier to verify the material origin and heat treatment hardness (HRC).

Buyers must specify the mould base standard (e.g., LKM, HASCO, or DME) to ensure global compatibility for spare parts. Key technical parameters include the number of cavities, runner type (Hot Runner vs. Cold Runner), and shrinkage rate calculation based on the specific plastic resin (e.g., ABS, PC, or PP). Ensure the supplier provides 2D/3D CAD designs for approval before steel cutting begins.

Implement a Mould Trial (T1, T2, T3) process. The supplier should provide a Mould Trial Report and sample parts for your inspection. Check for defects like flash, short shots, or sink marks. A critical benchmark is the Cycle Time; a shorter cycle time increases your production efficiency. Demand a guaranteed mould life (e.g., 300,000 shots) written into the contract.

Moulds must comply with the Machinery Directive 2006/42/EC for European markets, often requiring CE marking. Ensure the mould includes safety protection features like limit switches and transport locking bars. For food-grade or medical products, the mould must be manufactured in a cleanroom environment and use NSF-certified lubricants.

The biggest risk is Intellectual Property (IP) leakage and material substitution (using cheaper steel than quoted). To mitigate this, sign a Non-Disclosure Agreement (NDA) and use third-party inspections during the heat treatment stage. Another risk is shipping damage; moulds are heavy and prone to rust, so ensure they are coated with anti-rust oil and packed in vacuum-sealed foil within fumigated wooden crates.

Standard industry payment is 40% deposit, 30% after T1 sample approval, and 30% before shipment. Never pay 100% upfront. For lead times, typical mould fabrication takes 35 to 60 days. Include a penalty clause for delays in the contract to ensure the supplier prioritizes your project. For sourcing reliable manufacturers, platforms like Made-in-China.com offer verified suppliers with audited manufacturing capabilities.

Due to the extreme weight, Sea Freight (LCL or FCL) is the most economical method. For urgent modifications, Air Freight is possible but very costly. Ensure the Incoterms are clearly defined; FOB (Free On Board) is recommended as it allows you to control the shipping costs and logistics through your own forwarder.

Use Secured Payment services provided by reputable B2B platforms like Made-in-China.com to protect your funds until the mould reaches the agreed milestone. Always verify the supplier's Business License and ISO 9001 Certification to ensure they are a legitimate factory and not a middleman.