Polyurethane foam behaviour during impact

Špirk, Stanislav; Křížek, Michal; Jeníček, Štěpán

doi:10.1051/matecconf/201815702050

Cited by 6 publications

(4 citation statements)

References 3 publications

(3 reference statements)

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“…There was a uniform scale for both conditions. The ZČU logo shows approximately 90 °C at the start of the cooling phase and approximately 50 °C at the end [ 7 ].…”

Section: Simulationmentioning

confidence: 99%

“…The sprue cone was created using a steel insert. The insert in the solid part of the mould had a hole for the sprue bushing [6][7][8]. ISO/ASTM 52900.…”

Section: Mould Basementioning

confidence: 99%

“…The sprue cone was created using a steel insert. The insert in the solid part of the mould had a hole for the sprue bushing [6][7][8]. The uniqueness of the used mould base lies in the space filling (cavity insert and supporting inserts).…”

Section: Mould Basementioning

confidence: 99%

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Injection Moulding into 3D-Printed Plastic Inserts Produced Using the Multi Jet Fusion Method

et al. 2023

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Most injection-moulded plastics are injection moulded into moulds made from conventional materials such as steel or aluminium. The production costs of the mould are considerable. 3D printing from plastic can be used for injection moulds to save these costs. This article deals with injection moulding into a 3D-printed plastic mould. The injection insert was produced on a HP Multi Jet Fusion 4200 3D printer. The other part of the mould was made of aluminium. A custom injection mould was designed for the research. One insert was made from plastic, and one from aluminium. Both moulds were injected under the same injection conditions. A comparison of injection moulding into the plastic and aluminium inserts is made in this article. The difference when injection moulding into the plastic insert is explained using the different technological conditions. The part injected into the plastic insert was also different from the part injected into the aluminium insert. The difference is explained in this article. This article also looks at the interface between the injection-moulded part and the plastic insert using an electron microscope. The images taken clarify the differences between injection moulding into a plastic insert and an aluminium insert and the differences of the injection-moulded part from the plastic insert.

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“…There was a uniform scale for both conditions. The ZČU logo shows approximately 90 °C at the start of the cooling phase and approximately 50 °C at the end [ 7 ].…”

Section: Simulationmentioning

confidence: 99%

“…The sprue cone was created using a steel insert. The insert in the solid part of the mould had a hole for the sprue bushing [6][7][8]. ISO/ASTM 52900.…”

Section: Mould Basementioning

confidence: 99%

See 1 more Smart Citation

Injection Moulding into 3D-Printed Plastic Inserts Produced Using the Multi Jet Fusion Method

et al. 2023

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“…These parameters are shown in the detail in the Figure5. The deformed part of the flash stopper must not interfere with the cavity [Spirk 2017] [Kim 2016.…”

mentioning

confidence: 99%

Untitled

2022

MM SJ

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This article deals with the injection moulding into the plastic mould. This is an unconventional approach to injection moulding, especially because the 3D printing is used to produce the mould. The mould with the same shape was made of a conventional material (aluminium) for comparison. The properties of the plastic mould were then compared to the aluminium mould. The flash was seen as the main shortcoming. The modifications of the mould were suggested in two variants, one of them was implemented.The advantage of the flash solution was described. Finally, other solution options were summarized based on the performed testing.

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Simulation of child passenger collision in the rail vehicle interior

Špirk

Vychytil

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Passive safety of rail vehicles is described by two documents. These requirements for structural crashworthiness are covered by EN 15227 standard. The GMRT 2100 standard (currently mandatory in UK) summarizes the requirements for interior safety. The actual legislation deals only with an injury of an average adult male (50 percentile). An assessment of interior passive safety for the wider population (5 and 95 percentile) will be other logical steps (in the near future). This approach is well known from automotive industry. This study identifies the most dangerous factors for child passenger collisions in the interior of a rail vehicle. Virtual simulations, finite element method and multibody simulations are used for that. It is possible to overtake the current trends and to carry out a rail interior safety assessment for children due to the excellent scalability of the VIRTHUMAN model. The data of the vehicle design were obtained from the local producers. The vehicles which are used in this research were developed recently and they are generally used. The injury criteria are used for probability of injury evaluation. Some first recommendations for rail interior design safe for children are provided at the end of this paper.

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Polyurethane foam behaviour during impact

Cited by 6 publications

References 3 publications

Injection Moulding into 3D-Printed Plastic Inserts Produced Using the Multi Jet Fusion Method

Injection Moulding into 3D-Printed Plastic Inserts Produced Using the Multi Jet Fusion Method

Untitled

Simulation of child passenger collision in the rail vehicle interior

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