Metering and dispensing of powder; the quest for new solid freeforming techniques

The need to meter and dispense dry powders or mixtures of powders occurs in a wide range of processes and industries. These include the preparation of pharmaceutical products, the mixing of pigments for paints, inks and glazes, the incorporation of processing additives and pigments into polymer processing lines such as extrusion and in solid freeforming processes. This short review identifies the common features of powder handling in these widely different areas and seeks to distinguish and classify the various principles. Examples are given of designs that span a range of industries. This review is stimulated by current developments in the selective laser sintering of powder assemblies; a solid freeforming pathway for polymer, ceramic and metal prototyping and manufacturing. The goal is to find metering and dispensing systems that are effective in providing the spatial arrangement of composition. Dispensing methods that can produce patterns of different powders are sought. Selective laser sintering of powder assemblies can then be extended from a method of rendering shape to one in which both shape and composition are delivered directly into the external world from a computer file.

[1]  L. B. Schein,et al.  Electrophotography and Development Physics , 1988 .

[2]  J. S. Buchanan,et al.  Moving cup particulates feeder used in laboratory FCC unit , 1994 .

[3]  David B. Marshall,et al.  Rapid prototyping of functional ceramic composites , 1996 .

[4]  Wamadeva Balachandran,et al.  Metering of Bulk Material with an Electrostatic Valve , 1995 .

[5]  Takehiro Takano,et al.  Excitation of a progressive wave in a lossy ultrasonic transmission line and an application to a powder-feeding device , 1998 .

[6]  Koji Yamamoto,et al.  Micro-feeding of a fine powder using a vibrating capillary tube , 1996 .

[7]  Shuji Matsusaka,et al.  Micro-feeding of fine powders using a capillary tube with ultrasonic vibration , 1995 .

[8]  Michael J. Cima,et al.  New Process and Materials Developments in 3-Dimensional Printing, 3DP ™ , 1998 .

[9]  David L. Bourell,et al.  Solid freeform fabrication. Powder processing , 1990 .

[10]  Wei Chen,et al.  Retardation and transitions of dilute and dense granular flows in a vertical pipe induced by electric fields , 2002 .

[11]  Pranav Kumar,et al.  Direct‐write deposition of fine powders through miniature hopper‐nozzles for multi‐material solid freeform fabrication , 2004 .

[12]  S. Yang,et al.  On the rate of descent of powder in a vibrating tube , 2005 .

[13]  Z. Tadmor,et al.  Principles of Polymer Processing , 1979 .

[14]  Mehta,et al.  Transient phenomena, self-diffusion, and orientational effects in vibrated powders. , 1993, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[15]  J. Israelachvili.  Intermolecular and surface forces , 1985 .

[16]  Shoufeng Yang,et al.  Device for preparing combinatorial libraries in powder metallurgy. , 2004, Journal of combinatorial chemistry.

[17]  Joseph Pegna,et al.  Exploratory investigation of solid freeform construction , 1997 .

[18]  D. Chulia,et al.  Powder technology and pharmaceutical processes , 1994 .

[19]  A. Y. H. Cho.  Contact Charging of Micron‐Sized Particles in Intense Electric Fields , 1964 .

[20]  F. N. Cogswell,et al.  Polymer melt rheology , 1994 .

[21]  Norio Shinya,et al.  Drawing and Observation of Electrified Images on Ceramic Substrates Using Electron Beam , 1996 .

[22]  E. J. Hinch,et al.  Powder flow down a vertical pipe: the effect of air flow , 2002, Journal of Fluid Mechanics.

[23]  Hongseok Choi,et al.  Micro rapid prototyping system for micro components , 2002 .

[24]  Harris L. Marcus,et al.  Solid Freeform Fabrication of Ceramics Using Selective Laser Sintering and Selective Area Laser Deposition , 1991 .

[25]  John Evans,et al.  Microengineering of Ceramics by Direct Ink‐Jet Printing , 1999 .

[26]  Xiaochun Li,et al.  Experimental and analytical study of ultrasonic micro powder feeding , 2003 .

[27]  John Evans,et al.  Computer control of powder flow for solid freeforming by acoustic modulation , 2003 .

[28]  Antonio Domenico Ludovico,et al.  An investigation of rapid prototyping of sand casting molds by selective laser sintering , 2002 .

[29]  R. M. Nedderman,et al.  Principles of Powder Mechanics. : Pergamon Press, 1970. 221 pp.,£3. , 1971 .

[30]  John Evans,et al.  Acoustic control of powder dispensing in open tubes , 2004 .

[31]  Tomoki Akita,et al.  Instruments for preparation of heterogeneous catalysts by an impregnation method , 2005 .

[32]  Knight,et al.  Density relaxation in a vibrated granular material. , 1995, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[33]  John W. Halloran,et al.  Freeform Fabrication of Ceramics via Stereolithography , 2005 .

[34]  M. L. Griffith,et al.  Understanding thermal behavior in the LENS process , 1999 .

[35]  O. Molerus.  INVITED REVIEW: FLOW BEHAVIOUR OF COHESIVE MATERIALS , 1982 .

[36]  John Evans,et al.  Dose uniformity of fine powders in ultrasonic microfeeding , 2007 .

[37]  Lynwood Bryant,et al.  Rudolf Diesel and his Rational Engine , 1969 .

[39]  G. M. Colver.  Dynamic and stationary charging of heavy metallic and dielectric particles against a conducting wall in the presence of a dc applied electric field , 1976 .

[40]  Jehnming Lin,et al.  Concentration mode of the powder stream in coaxial laser cladding , 1999 .

[41]  R. Irani,et al.  Flow Conditioning Anticaking Agents , 1959 .

[42]  Joel W. Barlow,et al.  Materials for biomedical applications , 1999 .

[43]  Chee Kai Chua,et al.  Dual Material Rapid Prototyping Techniques for the Development of Biomedical Devices. Part 2: Secondary Powder Deposition , 2002 .

[44]  Shuji Matsusaka,et al.  Effects of wall vibration on particle deposition and reentrainment in aerosol flow , 2002 .

[45]  M Hou,et al.  Granular flows through vertical pipes controlled by an electric field. , 2001, Physical review. E, Statistical, nonlinear, and soft matter physics.

[46]  Anthony V. Lemmo,et al.  A System for Dispensing Sub-Milligram Doses of Active Pharmaceutical Powders for Early Stage Solubility Assays , 2004 .

[47]  John Evans,et al.  A novel solid freeforming method using simultaneous part and mould construction , 2008 .

[48]  JH Song,et al.  A die pressing test for the estimation of agglomerate strength , 1994 .

[49]  J. Beaman,et al.  Processing of titanium net shapes by SLS/HIP , 1999 .

[50]  John Evans,et al.  A dry powder jet printer for dispensing and combinatorial research , 2004 .

[51]  H. H. Hausner,et al.  Influence of relative humidity on flow of metal and ceramic powders , 1974 .

[52]  R. Unocic,et al.  Composition control in the direct laser-deposition process , 2003 .

[53]  Roland Clift,et al.  An electromechanical valve for solids , 1992 .

[54]  Michael J. Cima,et al.  Integration of an Opto-Mechanical Mass Sensor with a Powder- Dispensing Device for Microgram Sensitivity , 2004 .

[55]  Joel W. Barlow,et al.  Selective laser sintering of alumina with polymer binders , 1995 .

[56]  M. J. Edirisinghe,et al.  Solid freeform fabrication of ceramics , 2003 .

[57]  Stephen K-F Wong,et al.  Fully Automated Solid Weighing Workstation , 2005, Journal of biomolecular screening.

[58]  John Evans,et al.  Acoustic initiation of powder flow in capillaries , 2005 .

[59]  C. K. Chua,et al.  Dual Material Rapid Prototyping Techniques for the Development of Biomedical Devices. Part 1: Space Creation , 2001 .

[60]  Mojtaba Ghadiri,et al.  Effect of the electrical clamping forces on the mechanics of particulate solids , 1991 .

[61]  Norio Shinya,et al.  Arrangement of silica particles on calcium titanate substrate and its appraisal , 1996, Smart Structures.

[62]  Valeriy V. Yashchuk,et al.  Production of dry powder clots using a piezoelectric drop generator , 2002 .

[63]  F. H. Norton,et al.  Elements of ceramics , 1952 .

[64]  B. F. Miller,et al.  THE FLOW PROPERTIES OF POWDERS UNDER HUMID CONDITIONS , 1958, The Journal of pharmacy and pharmacology.

[65]  Edgar M. Williams,et al.  The Physics and Technology of Xerographic Processes , 1984 .

[66]  John Troisi,et al.  Powder dispensing robot for sample preparation. , 2003, The Analyst.

[67]  John Evans,et al.  Preparing 3D Functional Gradients for SLS , 2005 .

[68]  Jon B. Olansen,et al.  Dispensing particles under atmospheric and vacuum conditions using an electrostatic device , 1989 .

[69]  Thomas J Pohida,et al.  Direct detection and time-locked subsampling applied to pulsed electron paramagnetic resonance imaging. , 2005, The Review of scientific instruments.

[70]  John Evans,et al.  Dry powder microfeeding system for solid freeform fabrication , 2006 .

[71]  Pranav Kumar,et al.  Preliminary Investigations on the Deposition of Fine Powders Through Miniature Hopper-Nozzles Applied to Multi-Material Solid Freeform Fabrication , 2003 .

[72]  John Evans,et al.  Zirconia/alumina functionally graded material made by ceramic ink jet printing , 1999 .

[73]  Kenneth J. McLean.  Cohesion of Precipitated Dust Layer in Electrostatic Precipitators , 1977 .

[74]  Mohsen A. Jafari,et al.  Processing of advanced electroceramic components by fused deposition technique , 2001 .

[75]  Shoufeng Yang,et al.  A multi-component powder dispensing system for three dimensional functional gradients , 2004 .

[76]  Wamadeva Balachandran,et al.  The study of the performance of an electrostatic valve used for bulk transport of particulate materials , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[77]  David L. Bourell,et al.  Selective laser sintering of metals and ceramics , 1992 .

[78]  John Evans,et al.  Studies on ultrasonic microfeeding of fine powders , 2006 .

[79]  Jörg Wallaschek,et al.  A system for powder transport based on piezoelectrically excited ultrasonic progressive waves , 2005 .

[80]  Gabriel I. Tardos,et al.  Precision dosing of powders by vibratory and screw feeders : an experimental study , 1996 .

[81]  D. Geldart.  Types of gas fluidization , 1973 .