Production & Quality
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Dimensional change with temperature/thermal expansion of methyl styrene-acrylonitrile copolymer products
Problem Phenomenon
Product dimensions change at different temperatures, exceeding the tolerance range.
Cause Analysis
(1) Methyl styrene-acrylonitrile copolymer has a large thermal expansion coefficient; temperature changes cause dimensional changes
(2) Products used in high-temperature environments, thermal expansion causes dimensional increase
(3) Inconsistent measurement temperature, different measurement results at different temperatures
(4) Uneven product wall thickness, different thermal expansion amounts at various locations
(5) Product is constrained and cannot expand freely, producing thermal stress
Solution
(1) Consider thermal expansion compensation in design
(2) Determine the tolerance range according to use temperature
(3) Measure dimensions at standard temperature (23°C)
(4) Optimize product wall thickness uniformity
(5) Reserve expansion gaps in design
Key Takeaway
Thermal expansion is an inherent material characteristic; temperature effects need to be considered in design.
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