Manufacturing Technology 2023, 23(4):495-503 | DOI: 10.21062/mft.2023.053

The Piston Velocity Impact on the Filling Chamber Wave Formation of High Pressure Die Casting Machine in 1st Phase of Casting Cycle

Jan Majernik ORCID..., Martin Podaril ORCID...
Institute of Technology and Business in České Budějovice. Okružní 517/10, 370 01 České Budějovice. Czech Republic

The quality properties of high pressure die casts are closely correlated with porosity. The formation of porosity is primarily initiated by entrapment of air and gases in the volume of the melt, during its transition through the gating system. This entrapment can occur as a result of an incorrect design of the gating system, incorrect setting of the casting technological parameters, or sometimes a combi-nation of both causes. The setting of the piston velocity in the first and second phase of the casting cycle has the highest proportion of the gas entrapment of all the technological parameters. The sub-mitted article is describing the influence of piston velocity in the first phase of the casting cycle. Ve-locities are investigated in range from 0.1 m.s-1 to 1.3 m.s-1. First of all, the development of the wave arising at different piston velocities is assessed and the gas entrapment in the melt volume is investi-gated. Subsequently, the proportion of the gas entrapment in the cast volume at the end of the filling phase is investigated depending on the variable value of the piston velocity in the first phase. In the end, the determination of the piston velocity impact in the first phase on the completion nature of the filling chamber of the machine is derived.

Keywords: HPDC, Piston velocity, Gas Entrapment, Porosity, Chamber Filling
Grants and funding:

Article is the result of the Project implementation: Development of excellent research capacities in the field of additive technologies for the Industry of the 21st century, ITMS: 313011BWN5, supported by the Operational Program Integrated Infrastructure funded by the ERDF

Received: March 12, 2023; Revised: June 12, 2023; Accepted: July 13, 2023; Prepublished online: July 13, 2023; Published: September 5, 2023  Show citation

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Majernik J, Podaril M. The Piston Velocity Impact on the Filling Chamber Wave Formation of High Pressure Die Casting Machine in 1st Phase of Casting Cycle. Manufacturing Technology. 2023;23(4):495-503. doi: 10.21062/mft.2023.053.
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