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Analysis of the physical and mechanical properties of the pine nut as criteria in the design of a pine nut shelter
xiv, 109 leaves : illustrations ; 28 cm.
14 mm is required to fracture seeds of different sizes, 3)
Among the hundred species of pines, a third are classified as
analyzed and a mechanical shelling device using counter
and 6) pine nut shells ruptured and shattered at low loading
and mechanical properties, design criteria for applying
as the pinon, pinyon, or North American nut pines. Pinus
attempted, but the shelters damage the nuts and reduce value
cembroides Zucc belongs to this category and is the species
continuous shelling method for shelling pine nuts.
damage, 4) compression forces to crack seeds of different
deformation of shell without contacting the nut, grouping
Eleven species of soft pine make up the group known variously
engineering principles for shelling pine nuts were developed.
establish design criteria for applying engineering principles
for shelling pine nuts. The scope of the work included
important part in the diet for humans. Most pine seeds are
measurement of physical and mechanical properties of pine
needed to provide a quality product at reasonable prices. The
nuts and evaluation of one engineering principle for
of the product. Improved mechanical shelling techniques are
overall goal of this work was to develop information to
presently shelled by hand. Mechanical. shelling has been
process to crack seeds is needed to obtain adequate shelling,
process. The engineering principles for cracking nuts were
rates, so impact loading is not necessary for the shelling
rotating roller principle can adequately crack 70% in a
rotating rollers for cracking nuts was constructed and
rupturing the seed shell. Based on the study of the physical
seeds in size classifications is needed to minimize nut
shells at rupture, 2) deformations ranging from 0.82 mm to 1.
size range from 159.76 N to 304.69 N, 5) a continuous feed
soft pines, Largely on the basis of wood and leaf anatomy.
tested. Results of the tests showed that the counter
These summarized criteria are: 1) cracking unsoaked seeds
used in this study. The seeds of this species form an
void spaces differ according to seed size allowing
with about 8.9% moisture content enhances shattering of
"Major subject: Agricultural Engineering".
Issued also on microfiche from Lange Micrographics.
Includes bibliographical references: pages 73-74.