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Wyszukujesz frazę "injection molding" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Evaluation of Repetitively Used Feedstock for Powder Injection Molding
    Autorzy:
    Jang, Jin Man
    Powiązania:
    https://bibliotekanauki.pl/articles/2174559.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    powder injection molding
    recycling
    rheology
    homogeneity
    feedstock
    Opis:
    This study investigates the effects of repetitive injection molding on the properties of feedstock using the AISI 4140 feedstock. The properties of feedstock are evaluated from the mixing homogeneity of powder and binder, rheological properties, and dimensional accuracy of parts sintered. The feedstock after the 1st injection molding shows a better homogeneity than as-received feedstock due to re-mixing effects between the screw and barrel during the injection molding process. As the number of recycling numbers increases, the homogeneity, viscosities ad shrinkage ratio of recycled feedstocks show slight differences with those of the as-received feedstock until the 6th molding injection. However, some rheological parameters like the moldability index sharply increased up to the 4th injection but shows a tendency to decrease thereafter.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1511--1515
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Analysis of Rheological Properties of Inconel 625 Superalloy Feedstocks Formulated with Backbone Binder Polypropylene System for Powder Injection Molding
    Autorzy:
    Gökmen, U.
    Türker, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351256.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    powder injection molding
    feedstock
    rheological properties
    Inconel 625
    Opis:
    Binder formula is one of the most significant factors which has a considerable influence on powder injection molding (PIM) processes. In the study, rheological behaviors and properties of different binder systems containing PIM feedstocks, Inconel 625 powder commonly used in space industry, were investigated. The feedstocks were prepared 59%-69% (volume) powder loading ratios with three diversified binder systems by use of Polypropylene as backbone binder. The average particle size of the Inconel 625 powder used was 12.86 microns. Components used in the binder were mixed for 30 minutes as dry in three dimensional mixing to prepare binder systems. Rheological features of the feedstock were characterized by using a capillary rheometer. Viscosities of the feedstocks were calculated within the range of 37.996-1900 Pa.s based on the shear rate, shear stress, binder formula and temperature. “n” parameters for PIM feedstocks were determined to be less than 1. Influences of temperature on the viscosities of the feedstocks were also studied and “Ea” under various shear stresses were determined within the range of 24.41-70.89 kJ/mol.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 1937-1944
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Hydrophobic Surgical Forceps using Powder Injection Molding and Surface Treatment
    Autorzy:
    Park, D. Y.
    Park, B. R.
    Gal, C. W.
    Lin, D.
    Han, J. S.
    Jeong, M.-S.
    Bollina, R.
    Hwang, W.
    Park, S. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/352093.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    powder injection molding
    hydrophobic
    debinding
    sintering
    surface treatment
    Opis:
    Hydrophobic surgical forceps of end-effectors for laparoscopic operations or minimally invasive surgery were developed through powder injection molding (PIM) and surface treatment. Processing conditions for mixing, debinding, and sintering were investigated to produce defect-free components. An optimum solid loading was determined by torque rheometry experiments. The optimized processing conditions for debinding and sintering were designed through the measurement of weight loss and shrinkage behavior by thermogravimetric analysis and dilatometry experiments. After producing the surgical forceps based on the optimized processing conditions via PIM, surface treatment was carried out to generate the hydrophobic structure on the surface.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 473-480
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Master Curve Model for Characterization of Decomposition and Densification Behavior of PbAlNbO3-PbZrTiO3 Ceramics
    Autorzy:
    Han, Jun Sae
    Park, Jae Man
    Park, Seong Jin
    Powiązania:
    https://bibliotekanauki.pl/articles/355280.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    master debinding curve
    master sintering curve
    PAN-PZT
    powder injection molding
    dilatometer
    Opis:
    In this study, decomposition and densification behavior of PbAlNbO3-PbZrTiO3 (PAN-PZT) ceramics were characterized for powder injection molding process. Thermal gravity analysis and in-situ dilatometer experiment were carried out to construct master curve. Based on master curve model approach, one-combined master debinding curve (MDC) and master sintering curve (MSC) were constructed for piezoelectric PAN-PZT ceramics. Derived curves matched well with the experimental data. Process optimization and material development will be conducted based on characterization of master curve parameters.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1099-1103
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oxide Formation In Metal Injection Molding Of 316L Stainless Steel
    Tworzenie tlenków podczas wtryskiwania proszku stali nierdzewnej 316L
    Autorzy:
    Jang, J. M.
    Lee, W.
    Ko, S.-H.
    Han, C.
    Choi, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/351352.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    powder injection molding
    sintering
    316L stainless steel
    sintering atmosphere
    micro parts
    wtryskiwanie proszku
    spiekanie
    stal nierdzewna 316L
    mikro-część
    Opis:
    The effects of sintering condition and powder size on the microstructure of MIMed parts were investigated using water-atomized 316L stainless steel powder. The 316L stainless steel feedstock was injected into micro mold with micro features of various shapes and dimensions. The green parts were debound and pre-sintered at 800°C in hydrogen atmosphere and then sintered at 1300°C and 1350°C in argon atmosphere of 5torr and 760torr, respectively. The oxide particles were formed and distributed homogeneously inside the sample except for the outermost region regardless of sintering condition and powder size. The width of layer without oxide particles are increased with decrease of sintering atmosphere pressure and powder size. The fine oxides act as the obstacle on grain growth and the high sintering temperature causes severe grain growth in micro features due to larger amount of heat gain than that in macro ones.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1281-1285
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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