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Enhancement of injection molding consistency by adjusting velocity/pressure switching time based on clamping force / J.-Y. Chen in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 5 (11/2019)
[article]
Titre : Enhancement of injection molding consistency by adjusting velocity/pressure switching time based on clamping force Type de document : texte imprimé Auteurs : J.-Y. Chen, Auteur ; C.-Y. Liu, Auteur ; M.-S. Huang, Auteur Année de publication : 2019 Article en page(s) : p. 564–572 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection Tags : 'Moulage par injection' 'Commutation vitesse/pression' Serrage Index. décimale : 668.4 Plastiques, vinyles Résumé : The velocity/pressure (V/P) switching time, the transition from the filling phase to the holding phase during the injection molding cycle, plays a crucial role in ensuring the quality of the injection molding. Improper settings can lead to a variety of defects, including oversize/undersize, excessive residual stress, flash, warpage, and the like. There are currently many V/P switching methods to choose from. For example, when the injection time or the screw position reaches a prescribed value, that is, when a specified percentage of the cavity is filled with the molten resin, the switching time can be started. These traditional V/P switching methods should work well using precision injection molding machines to ensure accurate and repeatable motion control. However, the quality of shot-to-shot injection molding still varies with environmental changes, such as varying mold/melt temperatures. In this study, we propose a V/P switching adjustment method involving part weight or maximum clamping force increments. It was found that the weight of the injection molded part was highly correlated with the maximum clamping force increment and the V/P switching time. Experimental verification by considering various settings such as V/P switching time, injection speed and holding pressure show that the adjustment method is a feasible means of assuring quality consistency. Note de contenu : - Correlation analysis
- Experimental verification with different injection speeds. V/P switching times and holding pressures
- Experimenmtal verification with different barrel temperaturesDOI : https://doi.org/10.3139/217.3867 En ligne : https://www.hanser-elibrary.com/doi/pdf/10.3139/217.3867 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33619
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 5 (11/2019) . - p. 564–572[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21324 - Périodique Bibliothèque principale Documentaires Disponible Equilibrer la pression dans les moules multiempreinte / Peter Gladigau in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 929 (04-05/2016)
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Titre : Equilibrer la pression dans les moules multiempreinte Type de document : texte imprimé Auteurs : Peter Gladigau, Auteur Année de publication : 2016 Article en page(s) : p. 50-55 Langues : Français (fre) Catégories : Empreinte (moule d'injection)
Matières plastiques -- Moulage par injectionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Un système semble avoir prouvé son efficacité pour équilibrer l'expansion de matière irrégulière et fluctuante dans les moules multiempreinte, tout en réduisant la détérioration des moulles et les pièces de rebut. Note de contenu : - PROCESSUS, RESULTAT ET APPLICATIONS DIVERSES
- RESTRICTION DES PROCESSUS TRADITIONNELS : 1. Injection pour un remplissage volumétrique complet de toutes les cavités - 2. Le principe de la fonction activeFlowBalance
- "Les cavités partiellement remplies subissent un équilibrage plus important que les cavités des comblées"
- Activité et avantage de l'activeFlowBalance
- Cas pratiqueEn ligne : https://drive.google.com/file/d/1HzRGc9_WJ27lgCw4Z5SeEN2_I1Rguny5/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26257
in PLASTIQUES & CAOUTCHOUCS MAGAZINE > N° 929 (04-05/2016) . - p. 50-55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18062 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Error-free coupling : Automation in injection molding : more control and flexibility in production Type de document : texte imprimé Auteurs : Susanne Palm, Auteur Année de publication : 2016 Article en page(s) : p. 39-40 Langues : Anglais (eng) Catégories : Automatisation
Matières plastiques -- Moulage par injection
Technique de la productionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Hörl Kunststofftechnik sees its core business in the production of small and micro parts made from technical plastics for the automotive and electronics industry. In operating and expanding its fully automated injection molding production, the supplier works closely together with Arburg. The machine manufacturer supplies turnkey systems that are precisely matched to manufacturing requirements. Note de contenu : - Small parts for use segments, electrostatic discharge
- No fear of industry 4.0En ligne : https://drive.google.com/file/d/1Lqe5wDaESesThycpMQdAviQu9VpTft2D/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25961
in KUNSTSTOFFE INTERNATIONAL > Vol. 106, N° 3 (03/2016) . - p. 39-40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17919 - Périodique Bibliothèque principale Documentaires Disponible Estimation of bulk melt-temperature from in-mold thermal sensors for injection molding / S. P. Johnston in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 4 (08/2015)
[article]
Titre : Estimation of bulk melt-temperature from in-mold thermal sensors for injection molding : Method Type de document : texte imprimé Auteurs : S. P. Johnston, Auteur ; G. A. Mendible, Auteur ; R. X. Gao, Auteur ; David O. Kazmer, Auteur Année de publication : 2015 Article en page(s) : p. 460-466 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse des données
Capteurs (technologie)
Etat fondu (matériaux)
Matières plastiques -- Moulage par injection
ThermométrieIndex. décimale : 668.4 Plastiques, vinyles Résumé : To improve part quality and consistency injection molders strive to control the temperature of the molten plastic during cavity filling. In-mold temperature sensors can effectively measure the temperature of the mold surface that contacts the melt; however, they do not provide a measure of the bulk melt temperature. An analysis was developed to use data from in-mold thermocouples to predict the plastic's bulk melt temperature. This analysis integrates the heat flux through the mold steel to calculate the bulk melt temperature. A mold instrumented with an in-mold thermocouple and an IR temperature sensor was used to validate the predictions. The effects of changing barrel temperature, coolant temperature, injection velocity, and cooling time were studied using a 21 run DOE. Validation was performed by comparing bulk temperature data from the IR temperature sensor with temperature predictions derived from the in-mold temperature sensor. Trends in the melt temperature were consistently predicted, however, the magnitudes were low due to residual heat remaining in the part at the end of the molding cycle. The analysis was more sensitive to process changes than raw data from the in-mold temperature sensor, thereby improving process observability. Note de contenu : - CONDITION ANALYSIS
- EXPERIMENTAL
- DATA ANALYSIS
- RESULTS : Effect of barrel temperature - Effect of coolant temperature - Effect of injection velocity - Effect of cooling timeDOI : 10.3139/217.3019 En ligne : https://drive.google.com/file/d/18CB8ux5-8Go8bbi69awZputEEgYNrXzP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24855
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 4 (08/2015) . - p. 460-466[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17359 - Périodique Bibliothèque principale Documentaires Disponible Estimation of bulk melt-temperature from in-mold thermal sensors for injection molding, part B : validation / G. A. Mendible in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 3 (07/2016)
[article]
Titre : Estimation of bulk melt-temperature from in-mold thermal sensors for injection molding, part B : validation Type de document : texte imprimé Auteurs : G. A. Mendible, Auteur ; David O. Kazmer, Auteur ; R. X. Gao, Auteur ; S. P. Johnston, Auteur Année de publication : 2016 Article en page(s) : p. 278-284 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Capteurs thermiques
Etat fondu (matériaux)
Matières plastiques -- Moulage par injection
Plan d'expérience
Polymères -- Fusion
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : An analytical method for estimating the bulk melt temperature in the injection molding process by means of in-mold temperature sensors was presented in Part A of this article. This method was validated using a transient cooling simulation of an injection molding process. The simulation considered the heat flux and heat accumulation in the mold starting from process startup until steady state was achieved. For the simulation, a full 3D model of the mold geometry was developed. The average coolant temperature and the initial cavity wall temperature were evaluated as boundary conditions. The first was found to provide a more accurate prediction of the bulk melt temperature although it increases the sensitivity of the method to the temperature measurement. Overall, the trends correlated well for both simulated and experimental data as well as the bulk temperature measurements. Note de contenu : - METHODOLOGY : Molding trials - Materials properties - Simulation
- RESULTS : Simulation accuracy - Validation of the prediction methodDOI : 10.3139/217.3024 En ligne : https://drive.google.com/file/d/1zgvr2KT5imM7WG9qIarnkjL5z5wy7eu_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26639
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 3 (07/2016) . - p. 278-284[article]Réservation
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