Ceramics for press molds, manufactured by Japan Tungsten Co., Ltd. "NPZ-28"
Reduction of mold regrinding labor and extension of mold parts lifespan. This is a ceramic that achieves reduced running costs for mold production and high efficiency.
The ceramic for molds "NPZ-28" is a composite ceramic that successfully combines high wear resistance and chipping resistance at a high level. "NPZ-28" was developed by Japan Tungsten Co., Ltd. as a material for mold parts used in the press punching of copper-based workpieces. It is made primarily of WC, the main component of cemented carbide, mixed with ZrO2, and since WC (which is conductive) is the main component, wire electrical discharge machining is also possible. As an example: "Cutting Edge" - Achieves a lifespan approximately twice that of conventional ultra-fine particle cemented carbide. - The regrinding allowance is about one-fifth. This has successfully reduced the regrinding labor for molds and extended the lifespan of mold parts, achieving both a reduction in running costs and increased efficiency. If you have any issues or themes related to mold peripheral parts, please feel free to contact us first.
basic information
The "NPZ-28" manufactured by Japan Tungsten Co., Ltd. is a composite ceramic material primarily composed of WC, which is the main component of cemented carbide, mixed with ZrO2 and sintering aids. By dispersing submicron WC particles in a ZrO2 matrix and optimizing the transformation toughening characteristics of ZrO2, it has successfully achieved a high level of both wear resistance and damage resistance as a ceramic. - Because WC is the main component, it realizes grinding properties close to those of cemented carbide. - Due to the conductivity of WC, wire electrical discharge machining is possible.
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Applications/Examples of results
The "NPZ-28" manufactured by Japan Tungsten Co., Ltd. was developed as a mold part material for press punching processing of copper-based workpieces. The recent acceleration of stamping speeds is remarkable, and conventional cemented carbides have limitations in wear resistance, necessitating frequent regrinding of cutting edges, which has become a significant bottleneck in the efficiency of high-speed press production. The "NPZ-28" achieves approximately twice the lifespan of the company's ultra-fine particle cemented carbide FN30 before regrinding. Additionally, since "NPZ-28" is a ceramic and does not contain a metallic binder phase like cemented carbide, it has less adhesion to the workpiece, and the grinding allowance during regrinding is about one-fifth that of cemented carbide, resulting in an almost fivefold improvement in the lifespan of the mold parts themselves.
