Molybdenum Alloy Component with Rectangular Mold Cavity Plate and Machined Surfaces

Rectangular mold cavity plate machined from molybdenum alloy to maintain dimensional stability and resist thermal fatigue under sustained high-temperature molding cycles where conventional tool steels (P20, H13) soften, distort, or develop heat checking. Also referred to as a cavity insert, die block, or mold core plate, the rectangular mold cavity plate is a critical structural and forming element in injection mold bases, compression mold assemblies, and specialty high-temperature die tooling. Molybdenum alloys used for mold cavity plates — including TZM (Mo-0.5Ti-0.1Zr), Mo-La2O3 (oxide-dispersion strengthened), and commercially pure molybdenum — are selected for their exceptional combination of high thermal conductivity (approximately 138 W/m-K for pure Mo, significantly higher than tool steels at approximately 25-30 W/m-K), high melting point (2,623 degrees C), low thermal expansion coefficient (approximately 5.1 x 10^-6 per degree C), and resistance to thermal shock and heat checking. TZM alloy retains useful strength above 1,000 degrees C and is the most widely specified molybdenum alloy for mold tooling applications. Plates are supplied in the stress-relieved or recrystallised condition and CNC-machined to your cavity geometry, with tolerances, surface finish (commonly Ra 0.4 to Ra 1.6 micrometres on forming surfaces), and datum scheme per your mold design drawing. EDM and wire-cut capabilities are available for complex cavity profiles and fine-detail features. Rectangular mold cavity plates in molybdenum alloy serve applications where extreme thermal demands exceed the capability of standard tool steels. Injection mold tooling for high-temperature engineering plastics (PEEK, PPS, PEI) and liquid crystal polymers uses molybdenum cavity inserts where mold surface temperatures above 200 degrees C are required to achieve proper polymer flow and crystallisation. Glass forming and pressing operations — including optical lens blanks, borosilicate labware, and container glass parisons — use molybdenum die inserts because the alloy resists glass adhesion and maintains dimensional accuracy at forming temperatures above 600 degrees C. Isothermal forging dies for titanium and nickel superalloy aerospace components use molybdenum alloy die blocks where die temperatures must be maintained at 900-1,100 degrees C to prevent workpiece cracking. Die-casting die inserts for copper and brass alloys use molybdenum core pins and cavity inserts to withstand the extreme thermal shock of molten copper at approximately 1,100 degrees C. ISO 9001-certified CNC machining facility in Ningbo (established 2002), handling specialty alloy components in series production with full material certification traceability. The plant covers approximately 4,000 m² and supports bicycle, fasteners, and furniture mold tooling requirements. Provide your cavity dimensions, cavity geometry (2D drawing or 3D model), tolerance requirements, surface finish specification, and molybdenum alloy grade (pure Mo, TZM, or Mo-La2O3) to request a quote for rectangular mold cavity plates from our Ningbo precision machining facility.