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Advances in Injection Molding for Polymer Processing
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Advances in Injection Molding for Polymer Processing

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: closed (31 May 2020) | Viewed by 3276

Special Issue Editor

Dr. Roberto Spina

E-Mail Website
Guest Editor
Department of Mechanics, Mathematics and Management (DMMM), Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy
Interests: polymer material conversion technology; thermoplastic injection molding; laser processing; production system optimization and planning
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Injection molding is actually one of the most complex manufacturing processes for producing plastic parts. The quality of products strictly depends on several factors and how to optimize process parameters is the key issue for improving products and process. The topics that will be investigated and presented in this Special Issue will focus on material characterization, process optimization, novel simulation techniques, the enhancement of production efficiency and automation. Academic and industry contributions will be accepted.

Prof. Roberto Spina
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • injection molding
  • materials
  • optimization
  • efficiency

Published Papers (1 paper)

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Research

19 pages, 10531 KiB  
Article
External Gas-Assisted Mold Temperature Control Improves Weld Line Quality in the Injection Molding Process
by Tran Minh The Uyen, Nguyen Truong Giang, Thanh Trung Do, Tran Anh Son and Pham Son Minh
Materials 2020, 13(12), 2855; https://doi.org/10.3390/ma13122855 - 25 Jun 2020
Cited by 16 | Viewed by 2970
Abstract
Simulations and experiments were conducted with gas temperatures of 200–400 °C to investigate the impact of external gas-assisted mold temperature control (Ex-GMTC) on the quality of weld line of molding products. In the heating step, the heating rate was 19.6 °C/s from 30 [...] Read more.
Simulations and experiments were conducted with gas temperatures of 200–400 °C to investigate the impact of external gas-assisted mold temperature control (Ex-GMTC) on the quality of weld line of molding products. In the heating step, the heating rate was 19.6 °C/s from 30 to 128.5 °C in the first 5 s in a 400 °C gas environment. When applied to heating the weld line area of an injection mold, Ex-GMTC improved the appearance of the weld line when the cavity temperature was preheated to 150 °C. For the tensile strength test, a melt flow simulation comparing the packing pressure of different mesh thicknesses revealed that Ex-GMTC helped maintain a high pressure in the weld line area in different packing periods. This was verified by an experiment where Ex-GMTC was applied with 400 °C gas to change the mesh area temperature. The result indicated that an increase in the weld line area temperature from 60 to 180 °C improves the tensile strength of all mesh thicknesses, which was more pronounced with thinner parts, especially at 0.4 mm. The simulations revealed that high temperature is concentrated in the weld line area of the cavity surface, thus reducing the energy wasted during heating. Full article
(This article belongs to the Special Issue Advances in Injection Molding for Polymer Processing)
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