Fine Details Obtained by 3D Printing and Using Polymers

Abstract

The three-dimensional printing is a manufacturing method involving the addition of materials by using certain principles valid in printing techniques. There are various techniques of a three-dimensional printing method and the most of them could be applied inclusively to generate objects of polymers. The objective of the research presented in this paper was to analyze the capabilities of 3D printing process or equipment of generating fine details and to identify a way of evaluating these capabilities when using polyester PLA as filament material. The systemic analysis of the printing techniques which use a fused polymer filament deposition showed that there are some groups of factors able to affect the obtaining of fine details. An experimental research was designed in order to highlight the influence exerted by the diameter of the nozzle orifice and by the values of sharp angles of isosceles triangles on the heights of these triangles, thus obtaining an image concerning the possibilities of generating sharp edges by three-dimensional printing. To evaluate the capacity of the 3D printing process of obtaining thin walls, a spiral including linear segments with a decreasing thickness from 1 mm was also achieved on the test piece. By mathematical processing of the experimental results using a specialized software, empirical mathematical models were determined to evaluate the intensity of influences exerted by the two process input factors on the heights corresponding to isosceles triangles characterized by sharp angles.

Evaluation of the Ability to Accurately Produce Angular Details by 3D Printing of Plastic Parts

“…The hypothesis that the accuracy of making areas with intersections in the form of sharp vertices could be improved if the thickness of the sample were large was still considered. Previously obtained results in the case of profiles generated on a plate had confirmed that areas characterized by intersection angles with sizes below a certain limit would no longer be able to be materialized by 3D printing, which will affect some dimensions of the produced parts [28]. Such a result could be even more obvious if the areas with sharp angles were not supported by a plate to which they were attached (Figure 1a).…”

“…Another group of researchers aimed to identify different shapes of parts that could be used to test the ability of additive manufacturing processes to produce certain details of the part [28,29] accurately.…”

Research Related to Breast Implant-associated Anaplastic Large Cell Lymphoma and its Influence on the Decision-Making Process Related to Reconstructive Techniques Analysis of a series of cases and literature review

“…Subsequent studies have led to the development of new techniques for treating silicone compounds in order to increase their consistency and resistance over time, as well as to improve their chemical stability. The coating of the prostheses are made up of three-dimensional silicone elastomers [7] with high mechanical strength that protects the silicone gel characterized by a variable cross-linking level and mechanical particularities strongly influenced by the degree of polymerization [8,9]. The consistency of the material increases in direct proportion to the number of dimethylsiloxane units within the polymers, affecting the physical properties of silicone [10].…”