Is the precision of mold processing related to price

　　The precision of mold processing is significantly positively correlated with price, and there is a non-linear increase. For every level of accuracy improvement, the cost may increase exponentially. The following is the specific correlation analysis and data support:

　　1. Correspondence between accuracy level and price

　　Precision level, typical tolerance range, price multiple (benchmark: ordinary level), applicable scenarios

　　Ordinary grade (IT10) ± 0.1mm or above 1x daily necessities, packaging boxes, etc

　　Classified level (IT7) ± 0.02~0.05mm 2-5x for household appliance shells and automotive interior parts

　　High precision density (IT5) ± 0.005~0.01mm 5-10 x electronic connectors, gears

　　Ultra precision (IT3) 10-50x optical lenses and medical minimally invasive devices below ± 0.001mm

　　Case:

　　The processing cost of ordinary injection molds (± 0.1mm) is about 50000 to 80000 yuan, while the same size mobile phone camera bracket mold (± 0.005mm) can reach 500000 to 800000 yuan.

　　2. Core factors contributing to the surge in costs

　　(1) Differences in equipment investment

　　Ordinary processing: three-axis CNC (domestic equipment, unit price about 500000 yuan)

　　Ultra precision machining: Five axis linkage CNC (such as Demagi HSC 70, unit price exceeding 5 million yuan)+nanoscale electric discharge machine (such as Shadick AG600L, unit price of 3 million yuan)

　　Data: The equipment cost differs by 10 times, but the accuracy has been improved to the μ m level.

　　(2) Process complexity

　　Mirror polishing: Hand polishing Ra0.025 μ m requires technicians to work for 8 hours per cavity, increasing the cost by 2000-5000 yuan per cavity.

　　Micro hole machining: Drilling deep holes with a diameter of 0.1mm (using tungsten steel micro drills) takes three times more time than ordinary drilling, and the cost of a single tool exceeds 800 yuan.

　　(3) Testing cost

　　Testing items: ordinary vernier caliper, coordinate measuring machine (CMM), laser interferometer

　　The cost per transaction is almost zero, ranging from 200-500 yuan to 1000-3000 yuan

　　Accuracy ± 0.02mm ± 0.001mm ± 0.0001mm

　　3. Accuracy and price curve inflection point

　　Economic critical point: When the tolerance requirement is ≤ 0.01mm, for every 0.001mm increase, the cost increases by 30% -100% (due to environmental inputs such as constant temperature workshops and earthquake resistant foundations).

　　Case comparison:

　　Automotive dashboard mold (± 0.05mm): 200000 yuan

　　Semiconductor packaging mold of the same size (± 0.003mm): 1.2 million yuan

　　4. Analysis of industry exceptions

　　Medical mold: Orthopedic implant molds that comply with ISO 13485 standards (joint surface Ra ≤ 0.05 μ m) can be priced up to 20 times higher than ordinary molds.

　　Optical mold: The contour error of the non spherical lens mold is ≤ 0.1 μ m, requiring ultra precision lathe and ion polishing, with a processing fee of over 2 million yuan.

　　5. Customer decision-making suggestions

　　Cost balance formula:

　　Total cost=Mold cost+(Single piece defect rate x Annual output x Single piece loss)

　　When mass production exceeds 100000 pieces, high-precision molds are actually more economical (such as reducing the defect rate of automotive parts molds from 5% to 0.1%, which can save millions of yuan).

　　Principle of accuracy trade-off:

　　Appearance components (such as phone cases): Priority should be given to IT5 level

　　Structural components (such as gearboxes): meet IT7 level requirements

　　Conclusion

　　The price and accuracy of mold processing are approximately exponentially related, but high-precision molds can achieve long-term benefits by extending their lifespan (such as 1 million times vs 300000 times) and reducing scrap rates. It is recommended to choose the accuracy level based on the added value of the product and the scale of mass production, in order to avoid wasting costs due to "excessive accuracy".