Used hanger mould

When sourcing a used hanger mould, you must verify the steel grade (e.g., P20, 718, or S136) as this determines the mould's longevity and corrosion resistance. Check the cavity number (e.g., 1x2 or 1x4) to ensure it meets your production capacity requirements. Additionally, inspect the cooling system for blockages or scale buildup, as efficient cooling is critical for maintaining a fast cycle time and preventing product warping.

Request the shot counter record or an estimate of the total shots already produced. A high-quality steel mould typically has a life of 300,000 to 1,000,000 shots. Examine the parting line for signs of wear or 'flash' (excess plastic), and check the ejection pins for smooth operation. If the mould surface shows significant pitting or mechanical damage, it may require expensive refurbishment or regrinding.

Ensure the mould dimensions (length, width, and height) fit within the tie-bar spacing of your machine. You must also verify that the clamping force required by the mould does not exceed your machine's capacity. Confirm the locating ring diameter and sprue bush radius match your machine's nozzle to prevent leakage during the injection process.

Look for moulds that feature interchangeable inserts, allowing you to produce hangers with different logos or sizes without changing the entire base. For high-efficiency production, a hot runner system is preferred over a cold runner as it reduces material waste and eliminates the need for manual sprue removal. Ensure the venting system is clear to avoid air traps and burn marks on the finished hangers.

The biggest risk is functional discrepancy, where the mould arrives damaged or does not match the video demonstrations. To mitigate this, always request a trial run video (mould test) showing the mould producing parts in real-time. Use secure payment terms and consider hiring a third-party inspection service to verify the mould's condition at the supplier's warehouse before final payment and shipment.

Focus your negotiation on the refurbishment scope; ask if the price includes polishing, replacing worn springs, or updating the cooling connectors. Request a detailed packing list that includes spare parts like O-rings and ejector pins. For bulk purchases of multiple used moulds, aim for a 10-15% volume discount or negotiate for FOB (Free On Board) terms to maintain better control over your international shipping costs.

Moulds are heavy and prone to rust during sea transit. Ensure the supplier applies anti-rust oil to the cavities and wraps the mould in vacuum-sealed plastic before placing it in a reinforced wooden crate (fumigated). Check your local customs tariff codes (HS Code: 848071) for 'Moulds for injection or compression types' to calculate import duties and ensure compliance with international trade policies regarding second-hand machinery.