Abstract
The aim of this paper is to show what extent there is an impact on the mechanical properties (tensile strength and tear strength) of a standardized testing sample made of rubber compound based on nature rubber and butadiene rubber produced by injection molding in comparison with a sample produced by classic preparation (cutting out a compression molded plate) according to the standard ISO 23529. For realization of this study it was necessary to design and produce an injection mold for all types testing samples. Subsequently, mechanical properties such as the tensile stress-strain and tear strenght of compression molded samples and injection molded samples were studied, compared and discussed.
Highlights
When producing rubber products it is necessary to watch and check the mechanical properties whether it be the properties of the processed material, i.e. the rubber compound, or properties of the product itself
Control of the mechanical properties of rubber products produced by injection molding is mostly performed on testing samples produced in another way, i.e. cutting off a compression molded plate. [1-13] This distinct way of producing testing samples and final products can result in different mechanical properties
During the injection molding the rubber compound comes in the mold cavity, having been preheated to a higher temperature, i.e. with lower viscosity, and owing to the injection speed and pressure it is subject to higher shear stress. [14-23] This distinct way of remolding can result in a different disposition of macromolecules in the material structure and different internal strain, which has an impact on the resulting properties of the final product. [24-33]
Summary
When producing rubber products it is necessary to watch and check the mechanical properties whether it be the properties of the processed material, i.e. the rubber compound, or properties of the product itself This control aims primarily on how the mechanical properties are influenced by the preparation of the rubberprocessing compounds itself, or the change of technological conditions, e.g. the curing time, the curing temperature etc. It does not deal with the impact of changing the whole production technology. Control of the mechanical properties of rubber products produced by injection molding is mostly performed on testing samples produced in another way, i.e. cutting off a compression molded plate. During the injection molding the rubber compound comes in the mold cavity, having been preheated to a higher temperature, i.e. with lower viscosity, and owing to the injection speed and pressure it is subject to higher shear stress. [14-23] This distinct way of remolding can result in a different disposition of macromolecules in the material structure and different internal strain, which has an impact on the resulting properties of the final product. [24-33]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
