Determination Of Specific Heat Capacity Of A Thermoplastic Material (ABS) For Use In Computer Aided Simulation In The Injection Molding Process

2009 ◽  
Author(s):  
M. A. Peydró Rasero ◽  
D. Juarez Varón ◽  
T. Boronat Vitoria ◽  
S. Ferrandiz Bou ◽  
Vicente Jesus Segui
Keyword(s):  
Heat Capacity ◽  
Injection Molding ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Injection Molding Process ◽  
Molding Process ◽  
Thermoplastic Material ◽  
Computer Aided

Determination of the specific heat capacity of healthy and tumorous human tissue

1995 ◽  
Vol 251 ◽  
pp. 199-205 ◽  
Author(s):  
K. Giering ◽  
I. Lamprecht ◽  
O. Minet ◽  
A. Handke
Keyword(s):  
Heat Capacity ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Human Tissue

Experimental determination of friction coefficients between thermoplastics and rapid tooled injection mold materials

2005 ◽  
Vol 11 (3) ◽  
pp. 167-173 ◽  
Author(s):  
Mary E. Kinsella ◽  
Blaine Lilly ◽  
Benjamin E. Gardner ◽  
Nick J. Jacobs
Keyword(s):  
Injection Molding ◽  
Accurate Determination ◽  
Rapid Tooling ◽  
Injection Molding Process ◽  
Process Conditions ◽  
Molding Process ◽  
Friction Coefficients ◽  
Content Type ◽  
Temperature Conditions

PurposeTo determine static friction coefficients between rapid tooled materials and thermoplastic materials to better understand ejection force requirements for the injection molding process using rapid‐tooled mold inserts.Design/methodology/approachStatic coefficients of friction were determined for semi‐crystalline high‐density polyethylene (HDPE) and amorphous high‐impact polystyrene (HIPS) against two rapid tooling materials, sintered steel with bronze (LaserForm ST‐100) and stereolithography resin (SL5170), and against P‐20 mold steel. Friction tests, using the ASTM D 1894 standard, were run for all material pairs at room temperature, at typical part ejection temperatures, and at ejection temperatures preceded by processing temperatures. The tests at high temperature were designed to simulate injection molding process conditions.FindingsThe friction coefficients for HDPE were similar on P‐20 Steel, LaserForm ST‐100, and SL5170 Resin at all temperature conditions. The HIPS coefficients, however, varied significantly among tooling materials in heated tests. Both polymers showed highest coefficients on SL5170 Resin at all temperature conditions. Friction coefficients were especially high for HIPS on the SL5170 Resin tooling material.Research limitations/implicationsApplications of these findings must consider that elevated temperature tests more closely simulated the injection‐molding environment, but did not exactly duplicate it.Practical implicationsThe data obtained from these tests allow for more accurate determination of friction conditions and ejection forces, which can improve future design of injection molds using rapid tooling technologies.Originality/valueThis work provides previously unavailable friction data for two common thermoplastics against two rapid tooling materials and one steel tooling material, and under conditions that more closely simulate the injection‐molding environment.

Computer Aided Engineering Design of Powder Injection Molding Process for a Dental Scaler Tip Mold Design

2007 ◽  
Vol 534-536 ◽  
pp. 341-344 ◽  
Author(s):  
Chul Jin Hwang ◽  
Y.B. Ko ◽  
Hyung Pil Park ◽  
S.T. Chung ◽  
Byung Ohk Rhee
Keyword(s):  
Injection Molding ◽  
Low Cost ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Injection Molding Process ◽  
Molding Process ◽  
Cross Model ◽  
Computer Aided Analysis ◽  
Computer Aided ◽  
Deflection Analysis

Powder Injection Molding (PIM) has recently been recognized as an advanced manufacturing technology for low-cost mass production of metal or ceramic parts of complicated geometry. With this regards, design technology of dental scaler tip PIM mold, which has complex shape and a slim core pin of 0.6 mm diameter, with the help of computer-aided analysis for powder injection molding process was developed. Computer-aided analysis for dental scaler tip mold was implemented by finite element method with non-Newtonian fluid, modified Cross model viscosity, PvT data of powder/binder mixture. The core deflection analysis of dental scaler tip PIM mold during PIM filling process was also investigated. Compter-aided analysis results, such as filling pattern, weldline formation, and air vent position prediction were investigated and eventually showed good agreements with experimental results.

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