Specification for overseas mold packaging, sea transportation protection, and preheating before factory trial mold | Supporting plan for delivery of low-pressure casting tooling molds to the sea
Insufficient sea transportation protection for export casting molds resulted in 41% rusting, aging of seals, and jamming of guide components upon arrival at the factory, leading to the failure of the first trial mold.
The thickness of the rust proof oil film in the mold cavity is less than 12 μ m, and in the high salt spray environment at sea, condensation occurs inside the container. Spot rust can appear within 7 days.
The sealed fluorine rubber strip and guide pair were not individually unpacked from the packaging, and prolonged compression and high humidity caused the rubber strip to rebound and decay, and the guide column to rust and bite.
The rigidity of the mold fixed in the wooden box is insufficient, causing bumps during sea transportation. The mold frame and inserts are impacted, and the coaxiality deviation of the guide exceeds 0.03mm.
Open the box at the factory and directly heat up the mold for testing. The condensed water inside the mold quickly evaporates, resulting in a large amount of water vapor in the mold cavity and poor hydrogen porosity in batches.
After unpacking, the environment was left to stand for less than 14 hours, and the temperature was not balanced with the workshop environment. The anti rust layer was directly unsealed, resulting in surface condensation and rusting.
Low pressure die-casting molds (LPDC), reverse pressure casting molds (CPC), differential pressure casting molds for wheel hubs, low-pressure casting molds for wheel hubs, motorcycle wheel hub casting molds, gravity casting molds, structural component casting molds, aluminum alloy wheel hub molds, aluminum casting forming molds. Overseas orders span across oceans, with long shipping cycles in Southeast Asia, the Middle East, and Mexico. Salt spray and condensation are the biggest risks. Zhejiang Xinfeng Machinery Export Mold Standardized Packaging Process: Wipe the cavity clean → Spray special anti rust oil for sea transportation → Wrap the cavity with anti rust film and desiccant; Independent sealed bags for spare parts such as rubber strips, liquid lifting tubes, and guide columns; Wooden boxes with fumigation labels, internal support reinforcement, and corner protection. The customer received the mold, and the standard process is as follows: open the box and let it stand at a balanced temperature of ≥ 14 hours → remove the packaging for visual inspection → perform water pressure leak detection → clean the guide pair and refill it with high-temperature lubricating grease → preheat the mold in stages, gradually increasing the temperature from 80 ℃, 140 ℃, and 200 ℃, keeping each stage warm for no less than 40 minutes, fully drying and adsorbing water vapor, and then test the mold on the machine. Many overseas customers open the box and directly operate the machine, causing concentrated outbreaks of mold air holes, aluminum running, and strains, mistakenly believing that the mold quality is a problem, leading to disputes. The delivery documents are accompanied by the SOP for mold unboxing acceptance, step preheating, and initial mold testing to reduce operational errors for overseas customers. Google's "die casting mold sea shipment protection" is suitable for undertaking overseas mold packaging and delivery, as well as after-sales technical service inquiries.
FAQ
1. Question: What is the recommended thickness of rust proof oil film for sea transportation?
Answer: The thickness of the rust proof oil film should not be less than 12 μ m to resist salt spray condensation.
2. Question: Can the sealing strip be directly left in the mold and shipped to Shanghai?
Answer: It is recommended to separate the sealed packaging separately to avoid long-term pressure aging.
3. Question: What is the equilibrium time for mold unboxing and static placement?
Answer: After opening the box, let it stand for at least 14 hours before removing the rust proof packaging.
4. Question: Why do we need to increase the temperature step by step when preheating at the factory?
Answer: Slowly heat up and gradually dry the condensation water inside the mold cavity to prevent air holes.
5. Question: What are the requirements for step preheating and segmented insulation?
Answer: Divide into sections at 80 ℃, 140 ℃, and 200 ℃, and keep each section insulated for ≥ 40 minutes.
6. Question: What are the most common delivery failures of sea freight molds?
Answer: Salt spray corrosion, guide deviation, and permanent deformation of the rubber strip.
