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A Combined In-Mold Decoration and Microcellular Injection Molding Method for Preparing Foamed Products with Improved Surface Appearance

Polymers, 2019-05, Vol.11 (5), p.778 [Peer Reviewed Journal]

2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2019 by the authors. 2019 ;ISSN: 2073-4360 ;EISSN: 2073-4360 ;DOI: 10.3390/polym11050778 ;PMID: 31052446

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  • Title:
    A Combined In-Mold Decoration and Microcellular Injection Molding Method for Preparing Foamed Products with Improved Surface Appearance
  • Author: Guo, Wei ; Yang, Qing ; Mao, Huajie ; Meng, Zhenghua ; Hua, Lin ; He, Bo
  • Subjects: Cooling ; Decoration ; Experiments ; Heat transfer coefficients ; Impact strength ; in-mold decoration injection molding ; Injection molding ; Mechanical properties ; microcellular injection molding ; Molds ; Plastic foam ; Polymer melts ; Skewed distributions ; Surface properties ; surface quality ; Temperature distribution ; Test methods ; Viscosity ; Warpage
  • Is Part Of: Polymers, 2019-05, Vol.11 (5), p.778
  • Description: A combined in-mold decoration and microcellular injection molding (IMD/MIM) method by integrating in-mold decoration injection molding (IMD) with microcellular injection molding (MIM) was proposed in this paper. To verify the effectiveness of the IMD/MIM method, comparisons of in-mold decoration injection molding (IMD), conventional injection molding (CIM), IMD/MIM and microcellular injection molding (MIM) simulations and experiments were performed. The results show that compared with MIM, the film flattens the bubbles that have not been cooled and turned to the surface, thus improving the surface quality of the parts. The existence of the film results in an asymmetrical temperature distribution along the thickness of the sample, and the higher temperature on the film side leads the cell to move toward it, thus obtaining a cell-offset part. However, the mechanical properties of the IMD/MIM splines are degraded due to the presence of cells, while specific mechanical properties similar to their solid counterparts are maintained. Besides, the existence of the film reduces the heat transfer coefficient of the film side so that the sides of the part are cooled asymmetrically, causing warpage.
  • Publisher: Switzerland: MDPI AG
  • Language: English
  • Identifier: ISSN: 2073-4360
    EISSN: 2073-4360
    DOI: 10.3390/polym11050778
    PMID: 31052446
  • Source: GFMER Free Medical Journals
    PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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