Optimization of powder injection molding of feedstock based on aluminum oxide and multicomponent water-soluble polymer binder

2011 ◽  
Vol 51 (7) ◽  
pp. 1376-1382 ◽  
Author(s):  
Berenika Hausnerova ◽  
Lucie Marcanikova ◽  
Petr Filip ◽  
Petr Saha
Keyword(s):  
Injection Molding ◽  
Aluminum Oxide ◽  
Powder Injection Molding ◽  
Polymer Binder ◽  
Water Soluble ◽  
Powder Injection ◽  
Soluble Polymer ◽  
Water Soluble Polymer

BILAYER STRUCTURES OF ARTIFICIAL LIPIDS IN A WATER-SOLUBLE POLYMER BINDER

1983 ◽  
Vol 12 (5) ◽  
pp. 625-626 ◽  
Author(s):  
Shoichi Hayashida ◽  
Hirotsugu Sato ◽  
Shungo Sugawara
Keyword(s):  
Polymer Binder ◽  
Water Soluble ◽  
Soluble Polymer ◽  
Water Soluble Polymer

scholarly journals Online Rheometry Investigation of Flow/Slip Behavior of Powder Injection Molding Feedstocks

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 432 ◽  
Author(s):  
Daniel Sanetrnik ◽  
Berenika Hausnerova ◽  
Vladimir Pata
Keyword(s):  
Surface Roughness ◽  
Injection Molding ◽  
Slip Velocity ◽  
Wall Slip ◽  
Powder Injection Molding ◽  
Water Soluble ◽  
Powder Injection ◽  
Powder Particle Size ◽  
Slip Effect ◽  
Rectangular Slit

Wall slip in the flow of powder injection molding (PIM) compounds can be the cause of unrealistically low viscosity values, and can lead to a failure of flow simulation approaches. Regardless of its importance, it has been considered only scarcely in the rheological models applied to PIM materials. In this paper, an online extrusion rheometer equipped with rectangular slit dies was used to evaluate the slip velocity of commercial as well as in-house-prepared PIM feedstocks based on metallic and ceramic powders at close-to-processing conditions. The tested slit dies varied in their dimensions and surface roughness. The wall-slip effect was quantified using the Mooney analysis of slip velocities. The smaller gap height (1 mm) supported the wall-slip effect. It was shown that both the binder composition and the powder characteristic affect slip velocity. Slip velocity can be reduced by tailoring a powder particle size distribution towards smaller particle fractions. The thickness of the polymer layer formed at the channel wall is higher for water-soluble feedstocks, while in the case of the catalytic polyacetal feedstocks the effect of surface roughness was manifested through lower viscosity at smooth surfaces.

Powder Injection Molding of Mullite: The Study of Binder Dissolution Behavior during Debinding Step Using Statistical Methods

2016 ◽  
Vol 690 ◽  
pp. 87-91
Author(s):  
Parinya Chakartnarodom ◽  
Nuntaporn Kongkajun ◽  
Nutthita Chuankrerkkul
Keyword(s):  
Polyethylene Glycol ◽  
Injection Molding ◽  
Statistical Methods ◽  
Hypothesis Test ◽  
Powder Injection Molding ◽  
Water Soluble ◽  
Statistical Hypothesis ◽  
Powder Injection ◽  
Dissolution Behavior ◽  
Composite Binder

The purpose of this work is to use the statistical methods including linear regression and statistical hypothesis test to study the dissolution behavior of polyethylene glycol (PEG), a water-soluble binder, during debinding step of the green specimens of mullite formed by powder injection molding (PIM). Two systems of composite binders were investigated including (A) 80 wt% polyethylene glycol (PEG) and 20 wt% polyvinyl butyral (PVB) and (B) 78 wt% PEG, 20 wt% PVB, and 2 wt% steric acid (SA)The lab-scale plunger type PIM machine was used to prepare the green specimens consisting of mullite powder and the composite binder. The possible solid loadings of the green specimens that could be prepared by this machine were 50, 52, and 54 vol% mullite (50, 48, and 46 vol% binder). The debinding was done by soaking the green specimens in the warm water at 40 or 60 oC to remove PEG. At level of significance 0.05 for statistical analysis, the dissolution behavior of PEG can be fitted with Avarami equation. In addition, from the Avarami equation obtained from each experimental condition, the dissolution rate of PEG was independent of the parameters used in this study including solid loading in the green specimens, water temperatures for debinding, and composite binder systems.

Water-soluble binder with high flexural modulus for powder injection molding

2005 ◽  
Vol 40 (5) ◽  
pp. 1105-1109 ◽  
Author(s):  
Minseok Song ◽  
Min Soo Park ◽  
Jin Kon Kim ◽  
Il Bum Cho ◽  
Kyung Ho Kim ◽  
...  
Keyword(s):  
Injection Molding ◽  
Flexural Modulus ◽  
Powder Injection Molding ◽  
Water Soluble ◽  
Powder Injection

Specific volume and features of compressibility during the molding of powder-polymer mixtures with wax-polypropylene binder

2019 ◽  
pp. 25-33
Author(s):  
Alexander Muranov ◽  
Alexey Semenov ◽  
Anatoly Kutsbakh ◽  
Boris Semenov
Keyword(s):  
Phase Transition ◽  
Comparative Analysis ◽  
Powder Metallurgy ◽  
Injection Molding ◽  
Polymer Binder ◽  
Polymer Mixture ◽  
Powder Injection ◽  
Polymer Mixtures ◽  
Pvt Data ◽  
Mathematical Processing

The article discusses one of the modern areas of powder metallurgy – the technology of manufacturing shaped parts by the powder injection molding (PIM). For the powder-polymer mixture (feedstock) with a wax-polypropylene binder of the solvent-thermal type of removal by isobaric volume dilatometry, the dependence of PVT state parameters was studied. For each component of the polymer binder, the dependence of pressure on the temperature of phase transition was obtained. As a result of mathematical processing and analysis of PVT data for the feedstock of the studied type, a technological window of parameters has been determined that allows injection molding of «green parts» with minimal volume shrinkage. The results of a comparative analysis of the compaction of feedstock with a polymer binder catalytic and solution-thermal type of removal are presented.

scholarly journals Self-Healing Polymer-Clay Hybrids by Facile Complexation of a Waterborne Polymer with a Clay

2021 ◽  
Author(s):  
Aranee Pleng Teepakakorn ◽  
Makoto Ogawa
Keyword(s):  
Vinyl Alcohol ◽  
Aqueous Media ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Smectite Clay

Water-induced self-healing materials were prepared by the hybridization of a water-soluble polymer, poly(vinyl alcohol), with a smectite clay by mixing in an aqueous media and subsequent casting. Without using chemical...

Ti-6Al-4V alloy bimodal powders for powder injection molding

2020 ◽  
Author(s):  
Elena Glazkova ◽  
Nikolay Rodkevich ◽  
Nikita Toropkov ◽  
Aleksandr Pervikov ◽  
Marat Lerner
Keyword(s):  
Injection Molding ◽  
Powder Injection Molding ◽  
Powder Injection
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