Optimized reaction injection molding

Details Optimized reaction injection molding Optimized reaction injection molding

1981-08-24

1985-08-06

Krass, Errol A.

Boots, shoes, and leggings

264327, 2643281, 2643282, 264510, 264578, 425542, 425543, G06F 1546, B29G 300

Patent

active

045340030

ABSTRACT:
Articles made by the reaction injection molding process obtain a reduced residence time in the mold, hence increasing the production rate, by choosing processing and material parameters according to the inventive method. This method makes use of material parameters and processing conditions, including temperature and cavity shape for determining the viscosity of prepolymer material as it solidifies in the cavity. This information is used to optimize fluid injection rates, temperature of the fluid or cavity wall, choice of reactive fluid, or shape of the cavity. Articles having more complex geometries than previously obtained can be produced when the cavity filling is mathematically simulated according to the present procedure, typically by means of a computer. This can ensure against blockage of critical passages in the cavity, polymer degradation, etc.

REFERENCES:
patent: 4035467 (1977-07-01), Campbell et al.
patent: 4338068 (1982-07-01), Suh et al.
Broyer, Ephriam and Christopher Macosko, `Heat Transfer and Curing in Polymer Reaction Molding`, U. of Minn., AICHE, 1976.
Domine, Joseph and Costas Gogos, `Simulation of Reactive Injection Molding`, Polymer Eng. and Science, vol. 20, No. 13, 1980.
Domine, Joseph, `Computer Simulation of the Injection Molding of a Liquid Undergoing Linear Step Polymerization`, 1976.
Huang, Chieh-Fong, `Simulation of the Cavity Filling Process with Marker and Cell Method in Injection Molding`, 1978.
Castro, Jose Mario, `Mold Filling and Curing Studies for the Polyurethane Rim Process`, 1980.
Lee, Ly James, `Analysis of Polyurethane RIM`, 1979.

Affiliated with

Also associated with

Rating

Optimized reaction injection molding does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optimized reaction injection molding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimized reaction injection molding will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-516351