As expected, solid injection
molded PC-S parts have a higher Young's modulus and ultimate strength than foamed tensile test bars.
The latter have oversized barrels (165 and 288 oz, respectively) so they can be used for foam or for solid injection
molding of handles, fasteners, and other attachments to be assembled with foam parts.
We can now understand why solid injection
molded parts often show signs of high stress.
Hettinga Equipment Inc.'s low pressure solid injection
molding system for integrally molding plastic with diverse materials, such as textile, film, metal wiremesh, and even electronics, in a single step, is another example of a moving away from standard techniques to solve a problem.
Instruments 881 Compact IC pro--Anion--MCS 2.881.0030 IC conductivity detector 2.850.9010 Combustion Module 2.136.0700 Autosampler MMS 5000 2.136.0800 Kit for solid injection
6.7302.000 920 Absorber Module 2.920.0010 MagIC NetTM 2.4 Compact 6.6059.241 Metrosep A Supp 5-150/4.0 6.1006.520 Metrosep A Supp 4/5 Guard/4.0 6.1006.500 Metrosep A PCC 1 HC/4.0 6.1006.310 Solutions Eluent anions c([Na.sub.2]C[O.sub.3]) = 3.2 mmol/L c(NaHC[O.sub.3]) = 1.0 mmol/L Suppressor regeneration c([H.sub.2]S[O.sub.4]) = 100 mmol/L solution Suppressor rinsing Ultrapure water Absorber solution 100 ppm [H.sub.2][O.sub.2] Parameters Ion Chromatography Recording time 20 min Column Metrosep A Supp 5-150/4.0 Flow 0.7 mL/min Temp, coefficient 2.3%/[degrees]C Sample loop 250 [micro]L Inj.
As shown in Table 2, the average weight reduction of microcellular injection molded PC-N and water-assisted microcellular injection molded PC-W foamed parts was approximately 10% compared to conventional solid injection
The Mucell process for producing microcellular injection molded parts is used and accepted globally as a technology option for providing a more dimensionally stable part through a reduction in residual stress, along with increased productivity versus solid injection
To produce a lighter plastic part having a cellular structure in the polymer matrix, the shot volume was reduced up to 15% as compared with conventional solid injection
Typical guidelines for solid injection
molding recommend an aspect ratio of rib width to nominal wall thickness ranging from 0.5 to 0.75.