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Mold Design / Mold Material
8. Mold Design 8.7 Mold Material The following must be taken into consideration for mold materials when molding DURACON® POM:
When mold corrosion is a problem, enlargement of gas vent or review of molding conditions is required. When these do not solve the problem, the mold material is changed. The following results were obtained in an experiment in which various steel materials were immersed in formic acid and the corrosion of their surfaces was examined: 2055 < P21 < D2 ≤ 440C < S17400 (Inferior) ← -------------------------------- → (Superior) Hardening and nitriding are good measures against abrasion. For reference, Tables 8-1 and 8-2 show the properties of various mold materials. Table 8-1 Thermal conductivity of mold materials
Table 8-2 Characteristics of mold materials
Appraisal class: (Superior) A" > A' > A > B' > B > C' > C > D' > D (Inferior)
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