Influence of Die Land Length on the Maximum Extrusion Force and Dry Ice Pellets Density in Ram Extrusion Process

Górecki, Jan; Łykowski, Wiktor

doi:10.3390/ma16124281

Cited by 4 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the low cohesiveness of the material, the researchers decided not to measure this parameter for densities below 1000 kg/m 3 . Taking into account the properties of pulverised CCD, specifically its high sublimation rate [31], the material was stored in special polystyrene foam containers with 40 mm thick walls.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Method for Determining the Coefficient of Friction Variation Pattern as a Function of Density at Low Temperatures Using the Example of Dry Ice–Steel Contact

Górecki,

Łykowski,

Husar

et al. 2024

Materials

Self Cite

View full text Add to dashboard Cite

The developments in manufacturing technologies are expected to reduce energy input without compromising product quality. Regarding the material densification process, numerical simulation methods are applied to achieve this goal. In this case, relevant material models are built using functions that describe the variation in mechanical parameters of the material in question due to its deformation. The literature review conducted for this research has revealed a shortage of experimental research methods allowing a determination of the coefficient of friction at low temperatures, approximately 200 K. This article proposes a method for determining the friction coefficient of dry ice sliding against steel. The experimental results were analysed to obtain several functions describing the variation in the coefficient of friction. These functions were then compared using goodness-of-fit indexes. Finally, two functions with similar goodness-of-fit values were chosen. The findings of this research project will complement the already available information and may be used in various research and implementation projects related to the development or improvement of currently used crystallised carbon dioxide conversion processes.

show abstract

Section: Methodsmentioning

confidence: 99%

“…Now, taking Equation (1) we can calculate the FW value by deducting the latter from the former value. Taking into account the properties of pulverised CCD, specifically its high sublimation rate [31], the material was stored in special polystyrene foam containers with 40 mm thick walls.…”

Section: Methodsmentioning

confidence: 99%

Method for Determining the Coefficient of Friction Variation Pattern as a Function of Density at Low Temperatures Using the Example of Dry Ice–Steel Contact

Górecki,

Łykowski,

Husar

et al. 2024

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The material is dried in the tray for 5 h until the mass The experimental material is fresh corn from the Wannuo 2018 variety, and the moisture content of fresh corn ears needs to be measured before the experiment. Moisture is used mainly to measure the moisture content of materials [27]. The measurement method is the constant temperature drying method.…”

Section: Protocolmentioning

confidence: 99%

“…According to the mismatch in the above equation, p = 0.5296, so it is insignificant, indicating that there are no other main factors affecting the experimental indicators. There is a significant quadratic relationship between the experimental indicators and the experimental factors [27].…”

Section: Multiple Regression Analysis Of Ear Damage Ratementioning

confidence: 99%

Design and Testing of a Directional Clamping and Reverse Breaking Device for Corn Straw

Fan

Wei

et al. 2023

Agriculture

View full text Add to dashboard Cite

Realizing high-quality and increased production of fresh corn and promoting diversified development of the corn industry structure not only can effectively promote the development of agricultural economy, but also can enrich people’s dietary culture. However, existing fresh corn machinery has a high rate of ear damage during the harvesting process, and the overall harvesting efficiency is not ideal. To reduce damage during the harvesting of fresh corn, a device for breaking ears of fresh corn was designed based on the directional clamping of corn straw reverse breaking method. Based on the physico-mechanical characteristics parameters of fresh corn ears, the main structural parameters of the directional clamping and conveying mechanism and the ear-breaking mechanism were determined. The overall inclination angle of the device is 15°, and the effective conveying length of the directional clamping mechanism is 550 mm; the ear-snapping mechanism comprises a snapping roll composed of a pair of six radial distribution function fingers, with an effective operating radius of 320 mm. By simulating and analyzing the reverse breaking movement of directional clamping corn straw, the key motion parameter ranges of the directional clamping conveying mechanism and breaking mechanism were obtained. The results of the bench test showed that under the optimal conditions of a directional clamping feeding speed of 1.67 m/s, a breaking wheel speed of 80 rpm, and a travel speed of 1.06 m/s, the lowest ear damage rate was 0.57%, and the lowest impurity rate was 1.87%. In addition, it was observed that flexible harvesting can improve harvest efficiency and quality. The study also found that actively applying force to the device can effectively avoid the problem of machine blockage and reduce the damage rate of ears (the following text uses ears instead of fresh corn ears).

show abstract

“…The dry ice extrusion process comprises compression and extrusion stages [23]. The available literature includes reports of numerical simulation studies of this process [24].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Density Fields of Numerical Analysis Output of Solid Carbon Dioxide Extrusion Process

Górecki¹,

Lindner²,

Wałęsa³

2023

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

Efforts to reduce energy consumption and explore alternative energy sources are paramount in production process research. However, a research gap exists regarding the evaluation of density fields in numerical analysis output of solid carbon dioxide (CO 2 ) extrusion. This study aims to address this gap by examining the density fields in the numerical analysis output of the extrusion process for solid CO 2 , commonly known as dry ice. Dry ice, a by-product of ammonia compounds production, requires efficient management due to its high sublimation rate. Ram pressing is a commonly used method for compressing dry ice, but the resulting product often exhibits non-uniform density fields, presenting challenges for process optimization. To bridge this research gap, an algorithm is verified for determining the percentage share of density fields in the numerical simulation results. By comparing simulations using single-and multiple-cavity dies, the algorithm provides valuable insights into the distribution of density within the extruded solid CO 2 . In overcoming the limitations of subjective comparative evaluation, this study offers objective measures for assessing and comparing numerical analysis outputs. The findings contribute to a deeper understanding and optimization of the solid CO 2 extrusion process, facilitating the production of high-density dry ice products with reduced energy consumption. In conclusion, this research not only bridges the research gap in evaluating density fields but also advances the field of solid CO 2 extrusion and waste materials management.

show abstract

Influence of Die Land Length on the Maximum Extrusion Force and Dry Ice Pellets Density in Ram Extrusion Process

Cited by 4 publications

References 34 publications

Method for Determining the Coefficient of Friction Variation Pattern as a Function of Density at Low Temperatures Using the Example of Dry Ice–Steel Contact

Method for Determining the Coefficient of Friction Variation Pattern as a Function of Density at Low Temperatures Using the Example of Dry Ice–Steel Contact

Design and Testing of a Directional Clamping and Reverse Breaking Device for Corn Straw

Evaluation of Density Fields of Numerical Analysis Output of Solid Carbon Dioxide Extrusion Process

Contact Info

Product

Resources

About