Optimization of the injection molding process for development of high performance calcium oxide -based ceramic cores

Zhou, Pengpeng; Wu, Guoqing; Tao, Ye; Cheng, Xu; Zhao, Jia; Hu, Nan

doi:10.1088/2053-1591/aaaeec

“…The mechanical property of green bodies and sintered parts are strongly influenced by different backbone polymers and powder compositions, and it was necessary to know the injection-molding behavior at different powder-binder compositions [12][13][14]. The higher strength is critical for producing MIM products with excellent dimensional accuracy.…”

Section: Introductionmentioning

confidence: 99%

Effect of interaction from the reaction of carboxyl/epoxy hyperbranched polyesters on properties of feedstocks for metal injection molding

Chen

¹

,

Ma

²

,

Zhou

³

et al. 2022

Mater. Res. Express

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The purpose of this study is to improve the properties of the feedstocks and shape retention of debinded parts by the reaction between 17-4PH stainless steel powders. Carboxyl-terminated hyperbranched polyester (CTHP) and epoxy-terminated hyperbranched polyester (ETHP) were used to treat the powders, and termed as CTHP-m and ETHP-m with carboxyl and epoxy group, respectively. Comparing with pristine, CTHP-m and ETHP-m, feedstock prepared from equal amount of CTHP-m and ETHP-m (CTHP-m/ETHP-m) possessed more excellent properties. The experimental results showed that the critical solids loading, flexural modulus, density and melt flow index of CTHP-m/ETHP-m feedstock were 63.8 vol.%, 2800 Mpa, 5.06 g/cm3 and 62 g/10min, respectively, which were obviously higher than that of others. Also, the shape retention of CTHP-m/ETHP-m debinded parts was the best of all the samples. The improved properties of CTHP-m/ETHP-m feedstock were attributed to the powder interaction between CTHP-m and ETHP-m formed by the chemical reaction between epoxy and carboxyl group.

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“…

In the past few years, polymers have widespread applications in aerospace, military, medical, instrumentation and other high-tech manufacturing fields, especially in ceramic injection molding [1][2][3][4] . Ceramic injection molding is often used to produce ceramic cores with complex inner cavity structure, which is a vital basis for precision casting such as hollow blade of aero-engine [5,6] . As the binder for preparing ceramic core, the fluidity of polymer is directly related to the forming quality of ceramic core.

…”

mentioning

confidence: 99%

Exploring the effect of cooling rate on non-isothermal crystallization of copolymer polypropylene by fast scanning calorimetry

Liao,

Hu,

Ikeda

et al. 2024

China Foundry

0

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In the past few years, polymers have widespread applications in aerospace, military, medical, instrumentation and other high-tech manufacturing fields, especially in ceramic injection molding [1][2][3][4] . Ceramic injection molding is often used to produce ceramic cores with complex inner cavity structure, which is a vital basis for precision casting such as hollow blade of aero-engine [5,6] . As the binder for preparing ceramic core, the fluidity of polymer is directly related to the forming quality of ceramic core. Due to its excellent fluidity, polypropylene (PP), acting as the organic vehicle, is often employed to improve the fluidity of ceramic powder [7][8][9] . However, the rapid cooling during the injection molding, usually

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Thermal and Rheological Behaviour of a Wax Based Binder and an Alumina Feedstock for Micro-PIM Application

Islam

¹

,

Samanta

²

,

Lohar

³

et al. 2021

Advances in Thermal Engineering, Manufacturing, and Production Management

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Optimization of the injection molding process for development of high performance calcium oxide -based ceramic cores

Cited by 4 publications

References 20 publications

Effect of interaction from the reaction of carboxyl/epoxy hyperbranched polyesters on properties of feedstocks for metal injection molding

Effect of interaction from the reaction of carboxyl/epoxy hyperbranched polyesters on properties of feedstocks for metal injection molding

Exploring the effect of cooling rate on non-isothermal crystallization of copolymer polypropylene by fast scanning calorimetry

Thermal and Rheological Behaviour of a Wax Based Binder and an Alumina Feedstock for Micro-PIM Application

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