Cost structure of small batch molds for aftermarket modified wheel hubs

Cost structure of small batch molds for aftermarket modified wheel hubs
300-2000 pieces of modified wheel hubs, with molds accounting for 15% -30% of the selling price, the cost of mold making is more crucial to the success or failure of the project than the cost of processing.
The cost of small batches is dominated by molds
The amortization of molds for mass-produced wheel hubs is usually less than 8 yuan per piece. A batch of 300 pieces may cost over 600 yuan per piece, with a difference of nearly two orders of magnitude.
This means that the pricing logic for small batch projects is completely different. The mold fee must be calculated separately and cannot be amortized into the unit price according to the mass production mode.
The common practice is that the mold cost is borne by the brand in one lump sum, and the product unit price only includes materials and processing, making the risks for both parties clearer.
Composition of mold opening cost
The quotation range for single cavity gravity molds is mostly between 60000 and 120000 yuan, with a simple structure and suitable for batches of 300-1000 pieces.
The quotation for low-voltage molds is usually between 150000 and 250000 yuan. The additional parts mainly include waterway, insulation system interfaces, and higher material requirements.
For complex modified models that require multi piece structures or inserts, the cost will increase by 20% -30%.
Where can we save
The first is the number of cavities. Small batches do not require multi cavity molds, single cavity is sufficient, and the saved costs can be used for surface treatment.
The second is the lifespan indicator. 300-2000 pieces do not require a lifespan of 50000 cycles, and the material and heat treatment requirements can be moderately reduced based on a design of 10000 cycles.
The third is automated configuration. Hand pouring combined with simple fixtures can save some interfaces and sensor configurations.
Where can't we save
The accuracy of the parting surface cannot be saved. The modification of wheel hubs requires high appearance standards, and obvious stitching can directly lead to returns.
The roundness of the wheel rim cannot be reduced. Exceeding roundness tolerance can affect dynamic balance, and modification customers are very sensitive to this.
Xinfeng Mold usually retains the complete T0 trial mold and first piece inspection in the modified wheel hub mold project, which accounts for a small proportion of the cost but has a clear value.
Modification and Reuse
The update of wheel types in the modification market is fast, and the lifecycle of a wheel type is usually 1-2 years. The modifiability of the mold is an important consideration.
Adopting an insert structure, only the spoke inserts are replaced during the redesign, which costs about 30% -40% of the entire mold and can shorten the cycle to 15-20 days.
The reuse of mold frames is another approach. The same mold base can adapt to different wheel types on the premise that the interface and overall dimension are unified.
How to negotiate a more reasonable quotation
Suggest discussing the mold cost separately from the product unit price. The mold cost is calculated based on the development cost, and the unit price is calculated based on the materials and processing hours.
The ownership of intellectual property rights for molds should be clearly stated. Whether the mold frame can be reused and who owns the drawings when making changes should be agreed upon in the contract.
The payment rhythm is commonly 3:4:3, which includes three nodes: signing the contract, T0 qualification, and mass production acceptance. Full prepayment poses a high risk to the purchaser.
Frequently Asked Questions
Q: How much does a small batch mold cost?
Answer: Gravity mode costs 60000 to 120000 yuan, while low-pressure mode costs 150000 to 250000 yuan.
Q: Are 300 pieces worth molding?
Answer: It needs to be calculated based on the selling price, and the mold cost usually needs to be borne separately.
Q: Can the mold frame be reused?
Answer: Yes, provided that the interface and external dimensions are consistent.
Q: Is the cost of redesigning high?
Answer: Replacing the spoke inserts is about 30% -40% of the entire mold.
Q: Can the lifespan requirements be reduced?
Answer: 10000 mold cycles are sufficient, and material requirements can be moderately reduced.
Q: How do I pay for the mold fee?
Answer: Common 3:4:3, paying by node is more secure.
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