Tento článek se zabývá různými způsoby vstřikování. Plastový díl může být plněn mnoha způsoby. Po... more Tento článek se zabývá různými způsoby vstřikování. Plastový díl může být plněn mnoha způsoby. Použití více vtoků je již ve vstřikovacím průmyslu běžné. Vícevtokové plnění má vliv na finální vlastnosti výrobku, zejména počet vtoků, načasování zavírání, otevírání a jejich pořadí. V tomto článku je referenčním dílem jednoduchá plastová krabička, která je v jednom směru výrazně delší než v ostatních. Na spodní straně krabičky jsou žebra, také na této straně jsou umístěné vtoky. Vstřikovat je možné celkem pěti vtoky. Všechny navržené varianty plnění jsou porovnány s ohledem na teplotu, tlak a počet studených spojů. Nejvýhodnější možností plnění vyšlo plnit od středu krabičky s postupným otevíráním dalších vtoků.This paper deals with different ways of injection molding. A plastic part can be generally filled many ways. Use of more than one gate is common in a plastic industry. Cascade molding can affect the final properties of the product, especially by the number of gates, timing of clo...
In this paper, in order to achieve the required properties, several numerical simulations of pres... more In this paper, in order to achieve the required properties, several numerical simulations of pressure loading of the welded manhole cover are performed. The analysis of displacement and stress using the finite element method in the software NX Siemens 12 were conducted. Verification of numerical results was done by performing prototype testing consistion of the permanent deformation test and a loading capacity test. The loading capacity test was performed until the fracture occurred. The main goal of the paper is to determine the behaviour of the manhole cover under pressure load. The outcome of the analysis will be used for the design development of similar manhole covers.
This work deals with the infill of 3D printed parts. The goal of this work is to provide recommen... more This work deals with the infill of 3D printed parts. The goal of this work is to provide recommendations on how much a part should be filled. The recommendation is supported by experiment. The selected load is tensile. Therefore, the geometry of the samples was based on the standard ČSN EN ISO 527-2. Five densities of infill were selected to determine an infill rate from 0 to 100%. In addition to the tensile strength values for each sample, the work also considers economic factors. Characteristic graphs for this issue were constructed at the end of the work. They give an overview of how tensile strength, as well as time, and the cost of 3D printing, change with increasing densities of infill.
Proceedings of the 30th International DAAAM Symposium 2019, 2019
This work deals with the infill of 3D printed parts. The goal of this work is to provide recommen... more This work deals with the infill of 3D printed parts. The goal of this work is to provide recommendations on how much a part should be filled. The recommendation is supported by experiment. The selected load is tensile. Therefore, the geometry of the samples was based on the standard ČSN EN ISO 527-2. Five densities of infill were selected to determine an infill rate from 0 to 100%. In addition to the tensile strength values for each sample, the work also considers economic factors. Characteristic graphs for this issue were constructed at the end of the work. They give an overview of how tensile strength, as well as time, and the cost of 3D printing, change with increasing densities of infill.
Tento článek se zabývá různými způsoby vstřikování. Plastový díl může být plněn mnoha způsoby. Po... more Tento článek se zabývá různými způsoby vstřikování. Plastový díl může být plněn mnoha způsoby. Použití více vtoků je již ve vstřikovacím průmyslu běžné. Vícevtokové plnění má vliv na finální vlastnosti výrobku, zejména počet vtoků, načasování zavírání, otevírání a jejich pořadí. V tomto článku je referenčním dílem jednoduchá plastová krabička, která je v jednom směru výrazně delší než v ostatních. Na spodní straně krabičky jsou žebra, také na této straně jsou umístěné vtoky. Vstřikovat je možné celkem pěti vtoky. Všechny navržené varianty plnění jsou porovnány s ohledem na teplotu, tlak a počet studených spojů. Nejvýhodnější možností plnění vyšlo plnit od středu krabičky s postupným otevíráním dalších vtoků.This paper deals with different ways of injection molding. A plastic part can be generally filled many ways. Use of more than one gate is common in a plastic industry. Cascade molding can affect the final properties of the product, especially by the number of gates, timing of clo...
In this paper, in order to achieve the required properties, several numerical simulations of pres... more In this paper, in order to achieve the required properties, several numerical simulations of pressure loading of the welded manhole cover are performed. The analysis of displacement and stress using the finite element method in the software NX Siemens 12 were conducted. Verification of numerical results was done by performing prototype testing consistion of the permanent deformation test and a loading capacity test. The loading capacity test was performed until the fracture occurred. The main goal of the paper is to determine the behaviour of the manhole cover under pressure load. The outcome of the analysis will be used for the design development of similar manhole covers.
This work deals with the infill of 3D printed parts. The goal of this work is to provide recommen... more This work deals with the infill of 3D printed parts. The goal of this work is to provide recommendations on how much a part should be filled. The recommendation is supported by experiment. The selected load is tensile. Therefore, the geometry of the samples was based on the standard ČSN EN ISO 527-2. Five densities of infill were selected to determine an infill rate from 0 to 100%. In addition to the tensile strength values for each sample, the work also considers economic factors. Characteristic graphs for this issue were constructed at the end of the work. They give an overview of how tensile strength, as well as time, and the cost of 3D printing, change with increasing densities of infill.
Proceedings of the 30th International DAAAM Symposium 2019, 2019
This work deals with the infill of 3D printed parts. The goal of this work is to provide recommen... more This work deals with the infill of 3D printed parts. The goal of this work is to provide recommendations on how much a part should be filled. The recommendation is supported by experiment. The selected load is tensile. Therefore, the geometry of the samples was based on the standard ČSN EN ISO 527-2. Five densities of infill were selected to determine an infill rate from 0 to 100%. In addition to the tensile strength values for each sample, the work also considers economic factors. Characteristic graphs for this issue were constructed at the end of the work. They give an overview of how tensile strength, as well as time, and the cost of 3D printing, change with increasing densities of infill.
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