A Reaction Injection Molded Plastic Sound Cover for a Diesel Engine Oil Pan

The thermal properties of engine oil are important traits affecting the ability of the oil to transfer heat from the engine. The larger the thermal conductivity and specific heat, the more efficiently the oil will transfer heat. In this work, we measured the thermal conductivity and specific heat of a conventional mineral oil-based diesel engine lubricant and a Group V-based LHR diesel engine lubricant as a function of temperature. We also measured the specific heat of ethylene glycol. The measured values are compared with manufacturers’ data for typical heat transfer fluids. The Group V-based engine oil had a higher thermal conductivity and slightly lower specific heat than the mineral oil-based engine oil. Both engine oils had values comparable to high-temperature heat transfer fluids.

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Fracture failure of connection pipe of truck diesel engine oil-collector

Engineering Failure Analysis ◽

10.1016/j.engfailanal.2010.08.011 ◽

2011 ◽

Vol 18 (1) ◽

pp. 499-504

Author(s):

Zhi-wei Yu ◽

Xiao-lei Xu ◽

Cun-jie Li

Keyword(s):

Diesel Engine ◽

Engine Oil ◽

Fracture Failure

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Defect Minimization of an Injection Molded Plastic Component Using Conformal Cooling Channels

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1019.205 ◽

2021 ◽

Vol 1019 ◽

pp. 205-210

Author(s):

Deepika S. Singraur ◽

Bhushan T. Patil ◽

Vasim A. Shaikh

Keyword(s):

Performance Parameters ◽

Cooling Process ◽

Conformal Cooling ◽

Cooling Channels ◽

Molded Part ◽

Cooling Method ◽

Conformal Cooling Channels ◽

Differential Shrinkage ◽

Injection Molded ◽

Injection Molded Plastic

The cooling process is an essential aspect while designing for uniform heat transfer between the mold and the molded part. Improper design and placement of cooling channels result in non-uniform cooling and thus results in differential shrinkage and warpage on the final product. The installation of the channels yet plays a crucial role in the cooling of the part. Conforming channels that are placed at an optimum distance from the part to enhance the cooling process. In this paper, the performance parameters of straight drilled channels are compared with the conformal cooling channels for an electric alarm box. The analysis indicates that the conformal cooling method improved and enhanced the cooling process and reduced the defects like warpage and differential shrinkage by 25.5% and 28.0% respectively.

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