Kochov, Atanas
Preferred name
Kochov, Atanas
Official Name
Kochov, Atanas
Main Affiliation
Email
atanas.kochov@mf.edu.mk
13 results
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Item type:Publication, Expert System for Mold Quotation(Department for Production Engineering, Faculty of Technical Sciences, Novi Sad, Serbia, 2015-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, OVERVIEW OF THE APPLICATION OF STEREOLITHOGRAPHY IN ADDITIVE MANUFACTURING OF INJECTION MOLDING TOOL INSERTS(Faculty of Technical Sciences DEPARTMENT OF PRODUCTION ENGINEERING 21000 NOVI SAD, Trg Dositeja Obradovica 6 SERBIA, 2024-09); This paper provides a comprehensive overview of the application of Stereolithography (SLA) in the additive manufacturing of mold inserts. It explores the advantages and limitations of using the SLA technology for producing high-precision, intricate mold inserts compared to traditional manufacturing methods. Key benefits such as reduced lead times, cost-effectiveness for small production runs, and enhanced design flexibility are discussed. The paper also addresses the challenges related to material properties, thermal stability, and durability of SLA-produced inserts. Additionally, advancements in SLA materials and post-processing techniques are reviewed to showcase improvements in mechanical and thermal properties. The findings underscore the potential of SLA technology to revolutionize mold manufacturing, offering significant benefits in rapid prototyping and small to medium-scale production environments. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Mold Design and Production by Using Additive Manufacturing (AM) - Present Status and Future Perspectives(Scientific-Technical Union of Mechanical Engineering “INDUSTRY 4.0”, 2018-06); This paper covers the advanced Additive Manufacturing (AM) techniques applied to injection mold design and production. Its aim is to do a comprehensive analysis on what AM is doing for the recent and future perspectives in the field of mold’s production. Further analyses are done on the possible use of Rapid Tooling (RT) techniques based on AM technologies. These include plastic mold inserts made using high strength polymer resins and metal-based technologies for direct tooling work. Moreover, the work also reviews conformal cooling channel design based on laser sintering AM technologies and its effect in improving mold cooling efficiency to reduce cycle times, which is an important issue in the injection molding process. Finally, a brief techno-economical analysis is presented, as well as a comparison between the two different types of molds – the conventional ones, and molds produced by rapid tooling. The conclusions leads toward future usage of RT and AM in the mold design and production. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, SLA-Based Injection Molding Tool Inserts: Challenges,Innovations, and Future Prospects(Faculty of Technical Sciences, 2024-11-03); Stereolithography (SLA), a key technology in additive manufacturing, has transformed the production of injection molding tool inserts by enabling rapid prototyping and cost-effective small scale production. SLA utilizes photopolymer resins to fabricate intricate, high-precision molds, reducing lead times and costs. However, challenges such as limited mechanical strength, lower thermal resistance, and slower heat dissipation compared to traditional materials constrain its broader adoption. This paper reviews the application of SLA in injection molding, emphasizing advancements in high-performance resins that improve durability, thermal stability, and mechanical properties. Key factors affecting mold performance, including material flowability, cooling times, and injection pressure, are discussed alongside optimization strategies like modular designs and post-processing techniques. While SLA molds may not rival traditional tools for high-stress applications, they excel in rapid tooling and prototyping. As material and process innovations continue, SLA is poised to play a transformative role in modern injection molding, bridging additive and traditional manufacturing. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Experimental Research of the Mechanical Properties of the Injection Molded Parts in Molds Produced By Additive Manufacturing(University Ss. Cyril and Methodius in Skopje, 2023); In this study, additive manufacturing emerges as an innovative technology for concurrent engineering in the design and production of molds for injection molding processes. The primary objective is to conduct experimental research on the mechanical properties of injection-molded parts using a non-conventional mold produced through additive manufacturing technologies. The state-of-the-art additive manufacturing technologies provide various methodologies and techniques for designing and printing parts. Utilizing these diverse technologies significantly expands the possibilities for rapidly creating molds, thereby enhancing the scope of rapid tooling in the molding process. The study begins by designing and fabricating SLA mold inserts according to the relevant tensile testing standards. To evaluate the mechanical properties, a series of tensile tests are conducted and a comparison is made between the properties of the molded parts produced with SLA mold inserts. The results demonstrate that SLA mold inserts made with additive manufacturing can effectively produce injection molded parts with comparable tensile strength to those manufactured using traditional steel molds. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Tensile strength and dimensional variances in parts manufactured by SLA 3D printing(Scientific-Technical Union of Mechanical Engineering “INDUSTRY 4.0”, 2021-12); With the rise of additive manufacturing (AM) technologies, a numerous limitations in conventional manufacturing have been circumvented. Additive manufacturing uses layer-by-layer fabrication of three-dimensional physical models directly from a computer-aided design (CAD) model. The CAD design is transformed into horizontal cross-section layers that are stacked together in physical space until the physical model is completed. This process can be used to directly manufacture tools for injection molding or for any other technology that requires a specific cavity shape to produce a part. This is referred to as Rapid Tooling (RT) and one of the up and coming AM technologies is the resin based stereolithography (SLA). - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Analysis of the Geometrical Parameters and Factors which Define the Complexity and the Form of the Mold(Department for Production Engineering, Faculty of Technical Sciences, Novi Sad, Serbia, 2014-01); ; Spiroski, ZoranInjection molding is a technology in which the tool costs present a significant factor of the total production costs. Therefore, research and development in the field of advanced design and production of molding has a decisive influence on the final product quality but also on the economy of the process. Current paper describes an iterative analysis which has been employed in order to perform an advanced mold design and construction. This analysis is based upon experimental results which take into account the complexity of the mold’s core and cavity as well as the geometry of the final product. A mathematical function has been developed in order to estimate the total costs of the mold. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, New Product Design Development Based on Additive Manufacturing & Rapid Prototyping Methodology(Department for Production Engineering, Faculty of Technical Sciences, Novi Sad, Serbia, 2015-01); ; Todays advanced methods used in developing, designing and construction of new products are based on iterative analyses of all the parameters associated with the manufacturing process. Defining the specification of a new product nowadays is often followed by the construction of a functional prototype that has most of the crucial parameters that characterize the actual product. Additive manufacturing (3D printing) is a technology commonly used to produce physical prototypes and models for applications varying from mechanical and product design to archaeology and medicine. Apart from having to address limitations inherent to the printing process, getting the needed part clearance on the CAD model can be challenging as well. In this paper, we’ll go through the steps needed for converting 3D models into printable, functional, non-assembly models with an accent on 3D printed thread connections. The methods presented here were used effectively in developing a functional packaging prototypes for honey jars. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, CHEMICAL LEASING AS A NEW BUSINESS MODEL CONTRIBUTING TO SUSTAINABLE INDUSTRIAL DEVELOPMENT(Mechanical Engineering – Scientific Journal, 2016-06-06); ; The intensive use of natural resources and the increased amount of waste that influence negatively on the water and air pollution, gives us the concern to think more globally about new approaches and methods of work that will lead us to constant development of the concepts ensuring sustainable development. For this purpose, UNIDO developed a new business model for chemical management that is focused on providing services instead of selling substances. The aim of the Chemical Leasing concept as a business model is not only to change the traditional trade of chemicals and give value to the service that the chemicals do, but also to develop partnership between producers and consumers of different chemicals globally. Chemical leasing reduces the consumption of chemicals and optimizes their usage. It provides environmental, safety and economy improvements for all parties included in the concept. It is a challenge for small and medium sized enterprises to improve their image by participating in this innovative venture in developing countries and economy in transition. This paper presents the fundamentals of the chemical leasing concept and analysis its contribution to the sustainable industrial development. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The Application of Additive Manufacturing in Developing 3D Printed Prostethics and Orthotic Devices(Scientific-Technical Union of Mechanical Engineering “INDUSTRY 4.0”, 2019-12); This paper covers the advanced Additive Manufacturing (AM) techniques used to fabricate prostethic and orthotic devices. It reviews the available literature and summarizes the advances in medicine, computing and engineering that have led to the development of currently available prostheses. Some of the open-source bionic hands and other available prosthesis are shown, as well as the technologies and materials which are used to manufacture the parts. Since prototyping, combined with the possibility for easy maintenance and repair, is very attractive for prosthesis design, as a conclusion we summarize and discuss some of the key areas that could lead to improvements in bionic limb functionality and use.