In-situ temperature measurements in the depths of injection molded parts

Liu, Shih‐Jung; Su, Po-Chang; Lin, Kun-Yeh

doi:10.1016/j.measurement.2009.01.002

Cited by 11 publications

(8 citation statements)

References 14 publications

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“…in (10) This relationship allows the detection of a relationship between the local solidification time and the solidification temperature: (11) In the following, it will be assumed that each layer solidifies at the same temperature. This assumption is certainly reasonable for amorphous polymers and for semicrystalline fast crystallizing polymers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The knowledge of the local average solidification pressure true P normals true̅ requires the determination of both the local pressure history and the local solidification history. Despite recent attempts made to experimentally determine the temperature profile along the thickness direction of a molding, the local solidification history is not experimentally obtainable, and thus it is necessary to perform the simulation of the whole injection molding test in order to obtain it.…”

Section: Introductionmentioning

confidence: 99%

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Adopting the Experimental Pressure Evolution to Monitor Online the Shrinkage in Injection Molding

Speranza

Vietri

Pantani

2012

Ind. Eng. Chem. Res.

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In this work, a procedure is reported which is suitable to analyze online the quality of molded parts in terms of shrinkage. The procedure is based on the evaluation of the average solidification pressure, namely the average along the thickness of the pressure at which each layer solidifies, a parameter which is known to correlate well with shrinkage. The calculation of this parameter normally requires the estimation of the solidification history, information which is currently not reachable experimentally. The procedure reported in this work allows adoption of the pressure evolution measured by a piezoelectric pressure transducer to make an estimation of the solidification profile and thus of the average solidification pressure. The procedure is applied to the data of shrinkage measured on an amorphous PS and a semicrystalline iPP in a wide range of processing conditions.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adopting the Experimental Pressure Evolution to Monitor Online the Shrinkage in Injection Molding

Speranza

Vietri

Pantani

2012

Ind. Eng. Chem. Res.

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“…Another option to measure melt temperature with thermocouples is to place them at different depths in the cavity [47,48,49]. However, due to aesthetic requirements, this methodology is not used in industry and is limited only to research purposes [50].…”

Section: Temperature Sensorsmentioning

confidence: 99%

In-Mold Sensors for Injection Molding: On the Way to Industry 4.0

Ageyeva

Horvath

Kovács

2019

Sensors

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The recent trend in plastic production dictated by Industry 4.0 demands is to acquire a great deal of data for manufacturing process control. The most relevant data about the technological process itself come from the mold cavity where the plastic part is formed. Manufacturing process data in the mold cavity can be obtained with the help of sensors. Although many sensors are available nowadays, those appropriate for in-mold measurements have certain peculiarities. This study presents a comprehensive overview of in-mold process monitoring tools and methods for injection molding process control. It aims to survey the recent development of standard sensors used in the industry for the measurement of in-mold process parameters, as well as research attempts to develop unique solutions for solving certain research and industrial problems of injection molding process monitoring. This review covers the established process monitoring techniques—direct temperature and pressure measurement with standard sensors and with the newly developed sensors, as well as techniques for the measurement of indirect process parameters, such as viscosity, warpage or shrinkage.

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“…Further details concerning the importance of the temperature measurements can be also found in [37,38].…”

Section: Introductionmentioning

confidence: 99%

Industrial low cost temperature measurement in permanent electro-magnetic platens

Faranda

Lazzaroni

2013

Measurement

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In-situ temperature measurements in the depths of injection molded parts

Cited by 11 publications

References 14 publications

Adopting the Experimental Pressure Evolution to Monitor Online the Shrinkage in Injection Molding

Adopting the Experimental Pressure Evolution to Monitor Online the Shrinkage in Injection Molding

In-Mold Sensors for Injection Molding: On the Way to Industry 4.0

Industrial low cost temperature measurement in permanent electro-magnetic platens

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