Rapid Fabrication of POM Flexure Hinges via a Combined Injection Molding and Stereolithography Approach

2021 ◽  
Author(s):  
Marcello Valori ◽  
Luca Luzi ◽  
Rossella Surace ◽  
Vito Basile ◽  
Rocco Vertechy ◽  
...  
Keyword(s):  
Injection Molding ◽  
Flexure Hinges ◽  
Rapid Fabrication

Rapid Fabrication of POM Flexure Hinges via a Combined Injection Molding and Stereolithography Approach

2020 ◽  
Author(s):  
Marcello Valori ◽  
Rossella Surace ◽  
Vito Basile ◽  
Luca Luzi ◽  
Rocco Vertechy ◽  
...  
Keyword(s):  
Injection Moulding ◽  
Dimensional Accuracy ◽  
Research Activity ◽  
Flexure Hinges ◽  
Micro Injection Moulding ◽  
Rapid Fabrication ◽  
Manufacturing Techniques ◽  
Mechanical Performances ◽  
And Function

Abstract The aim of the research activity reported in this paper is to investigate a promising approach for the rapid and customized manufacturing of miniature flexure hinges with predictable and reliable mechanical performances. With these premises, the proposed methodology combines stereolithography and micro injection moulding, with the aim of exploiting the advantages of both manufacturing techniques. As a preliminary case study, a corner filleted hinge made of polyoxymethylene (POM) has been realized in multiple identical specimens that are then characterized in terms of both dimensional accuracy and function.

Filling Behavior of Polymer Material into Sub-^|^mu;m Structure in Injection Molding Process

2013 ◽  
Vol 133 (4) ◽  
pp. 105-111
Author(s):  
Chisato Yoshimura ◽  
Hiroyuki Hosokawa ◽  
Koji Shimojima ◽  
Fumihiro Itoigawa
Keyword(s):  
Injection Molding ◽  
Polymer Material ◽  
Injection Molding Process ◽  
Molding Process

Technological characteristics of injection molding of dynamic elastoplasts based on thermoplastic polyolefins and butyl rubber

2019 ◽  
pp. 58-67
Author(s):  
N. T. Kakhramanov ◽  
◽  
Z. N. Huseynova ◽  
V. S. Osipchik ◽  
R. V. Kurbanova ◽  
...  
Keyword(s):  
Injection Molding ◽  
Butyl Rubber ◽  
Technological Characteristics

Specific volume and features of compressibility during the molding of powder-polymer mixtures with wax-polypropylene binder

2019 ◽  
pp. 25-33
Author(s):  
Alexander Muranov ◽  
Alexey Semenov ◽  
Anatoly Kutsbakh ◽  
Boris Semenov
Keyword(s):  
Phase Transition ◽  
Comparative Analysis ◽  
Powder Metallurgy ◽  
Injection Molding ◽  
Polymer Binder ◽  
Polymer Mixture ◽  
Powder Injection ◽  
Polymer Mixtures ◽  
Pvt Data ◽  
Mathematical Processing

The article discusses one of the modern areas of powder metallurgy – the technology of manufacturing shaped parts by the powder injection molding (PIM). For the powder-polymer mixture (feedstock) with a wax-polypropylene binder of the solvent-thermal type of removal by isobaric volume dilatometry, the dependence of PVT state parameters was studied. For each component of the polymer binder, the dependence of pressure on the temperature of phase transition was obtained. As a result of mathematical processing and analysis of PVT data for the feedstock of the studied type, a technological window of parameters has been determined that allows injection molding of «green parts» with minimal volume shrinkage. The results of a comparative analysis of the compaction of feedstock with a polymer binder catalytic and solution-thermal type of removal are presented.

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