Diseño y construcción de una máquina inyectora de polipropileno para fines académicos e investigativos en el programa de Ingeniería Mecánica de la Universidad de Córdoba.
Nova Arrieta, Manuel Antonio | 2020-01-28
Across the board, thermoplastic polymers are used for different purposes and as a result,
its production is highly demanded in the market. Among the methods used for the
casting of plastics, the most commonly used is the injection process which novice
engineers need to know and be familiarized with.
To meet that end, it was designed and built a vertical injection machine of thermoplastic
which purpose is to inject polypropylene in a quantity that can be up to 120 grams. This
machine is aimed to be integrated to the pedagogy and research in the mechanic
engineering program of the University of Cordoba. To design this machine, it was
necessary to start from the use of vertical die-cut and packing of metal plates which
belongs to the University of Cordoba. Subsequently, some parts were subtracted as well
as some components were added; important concepts were involved, such as heat
transfer, hydraulics, engineering materials, materials mechanic, and the design of
machinery for completing the whole design. From the quantity of the maximum mass to
inject, there were established different parameters to the machine and the dimensioning
of all its parts.
In order to validate this project, all the parts were carefully examined to assure that any
of them may have porosities inside or outside, and that each of them meet all the
requirements in terms of dimensions. Crucial parameters during the process are
operating temperature, time of sustained pressure, type of material and mold preheating.