Large waste reduction thanks to direct gating / Horst-Werner Bremmer in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 5 (05/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 5 (05/2018) . - p. 33-34 Titre : Large waste reduction thanks to direct gating : Needle valve technology saves energy and improves efficiency Type de document : texte imprimé Auteurs : Horst-Werner Bremmer, Auteur Année de publication : 2018 Article en page(s) : p. 33-34 Langues : Anglais (eng) Catégories : Canaux chauffants Coût -- Contrôle Déchets -- Réduction Economies d'énergie Matières plastiques -- Moulage par injection Valve à aiguille (technologie) Index. décimale : 668.4 Plastiques, vinyles Résumé : A practical example from switch and plug outlet production shows the benefits that can be gained by using a hot runner system with needle-valve technology. In this case, the partner of the Belgian manufacturer Niko was Günther Heisskanaltechnik. Note de contenu : - Modification to full hot runner helps to save energy - faster production and color change - Fig. 1 : From the tunnel gate to hot runner direct gating : through the reduction of the sprue waste and energy consumption, manufacturing costs for plug outlets can be clearly reduced - Fig. 2 : Producing plug outlet covers means large quantities of articles - Fig. 3 : The production of the plug outlet covers is converted to an 8-cavity injection mold with electrically operated hot runner valve system En ligne : https://drive.google.com/file/d/1I_JlZ2T2PUNlGIeu5WNQsXjzgTwKkUfR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30600 [article]

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Looking over the application engineer's shoulder / Horst-Werner Bremmer in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 3 (2022)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 3 (2022) . - p. 25-27 Titre : Looking over the application engineer's shoulder : Testing the processing limits of modified POM copolymer Type de document : texte imprimé Auteurs : Horst-Werner Bremmer, Auteur Année de publication : 2022 Article en page(s) : p. 25-27 Langues : Anglais (eng) Catégories : Canaux chauffants Matériel médical Matières plastiques -- Appareils et matériel Polymères en médecine Polyoxyméthylène Technologie médicale Index. décimale : 668.4 Plastiques, vinyles Résumé : Nowhere are the demands imposed on materials higher than in the area of medical technology. That is under-standable because, after all, what is ultimately at stake here is the patient’s health. But any materials manufacturers seeking to use hot runner technology to process polymers in compliance with strict directives and differentiated legal regulations also need the expertise possessed by the hot runner manufacturer’s application engineers. Note de contenu : - Getting the processing right - Identifying and implementing optimization potential - Wide range of hot runner designs - The goal : Robust parameters worthy of discussion - Polymer know-how and contextual expertise combined - Fig. 1 : Example of delamination near the gating point in the case of Hostaform POM Slidex - Fig. 2 : Cross-sectional view of hot runner valve gate nozzle 6NHF50LA with BlueFlow thick-film heating element - Fig. 3 : The microtome section of the test specimen made of POM (Hostaform) reveals an inhomogeneous miicrostructure in the form of a cold plug near the gating point after closing of the needle - Fig. 4 : The microtome section of the specimen reveals a homogeneous microstructure near the gating point after closing of the needle following optimized process control En ligne : https://drive.google.com/file/d/11aeTLCF-tAG7a1QvOE9x7_R5IPmC6Yj-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37706 [article]

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The soft component first / Horst-Werner Bremmer in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 3 (03/2019)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 3 (03/2019) . - p. 40-42 Titre : The soft component first : Günther hot runner system for two-component application offers space even in tight conditions Type de document : texte imprimé Auteurs : Horst-Werner Bremmer, Auteur Année de publication : 2019 Article en page(s) : p. 40-42 Langues : Anglais (eng) Catégories : Canaux chauffants Elastomères thermoplastiques Matières plastiques -- Moulage par injection multicomposant Matières plastiques bi-composant Moules d'injection Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : Low assembly effort, often shorter production times and lower-cost parts production overall are the reasons why 2-component injection molding is often used in hard-soft material combinations, including in the production of seals, cable bushings and handles. If the core-back process is to be used for production, however, mold structure and hot runner system design will pose a challenge. Note de contenu : - Advantage 2-component - when it is done properly - Bottleneck between the two components - Two materials - one manifold block - Core-back combined with ejector function - Hot runner and mold expertise required - Fig. 1 : The various cable bushinsgs with the TPE/PP material combination were injected in a family mold - Fig. 2 : The cable bushing has to fulfil a comprehensive property profile, which has an obvious effect on product design and therefore also on the mold design - Fig. 3 : Themold was designed as a family mold. The unusual order also posed a challenge, since "soft" (TPE) had to be injected before "hard" (PP) - Fig. 4 : In order to achieve a flat height on the "hot half", both manifold systems were housed in a manifold block - Fig. 5 : The front-mounted nozzles present the advantage that they have a closed sealing ring at the nozzle head. This design creates a barrier between the manifold and the nozzle cabling and thus offer the highest level of safety when it comes to the seal in the system En ligne : https://drive.google.com/file/d/1-jRl1Va__gLvHZ03aGODnzKz1LfcisDi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32141 [article]

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Well-balanced hot runner technology for LCP processing / Horst-Werner Bremmer in KUNSTSTOFFE INTERNATIONAL, Vol. 111, N° 5 (2021)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 5 (2021) . - p. 20-23 Titre : Well-balanced hot runner technology for LCP processing : Connectors for industrial lifelines : high-tech injection molding at harting Type de document : texte imprimé Auteurs : Horst-Werner Bremmer, Auteur Année de publication : 2021 Article en page(s) : p. 20-23 Langues : Anglais (eng) Catégories : Canaux chauffants Equilibre thermique Matières plastiques -- Moulage par injection polymères cristaux liquides Index. décimale : 668.4 Plastiques, vinyles Résumé : Aside from offering high mechanical strength, versatility and durability, polymer materials are ideal for applications in the electrical industry because of their ability to isolate electrical current. For the production of connectors, Harting processes liquid crystal polymer (LCP), which lends itself to the production of intricate, thin-walled molded parts. LCP processing relies on hot runner systems that can guarantee a uniform thermal balance. Note de contenu : - The complexity of simplicity - Hot runner nozzles with a very good thermal profile - Thermal balance in the hot runner is essential - Punched strip accumulator installed upstream of the IM machine - 25 years' experience of LCP processing - Figure : For the conduction cooled MicroTCA systems, Harting processes LCP, a material that is flame-resistant, dimensionally stable at high temperatures, chemically resistant, and has only a low thermal expansion - Fig. 1 : Harting’s polymer molding shop also designs and adapts many new injection molds based on its own practical experience - Fig. 2 : Minimal cavity spacing, as can be seen here in a trade show exhibit fitted with the patented Blue Flow thick-film heating element (see Box p. 22), is key for many applications - Fig. 3 : "Lined up end to end, the 85 contact segments form the backplane for the printed circuit board," explains Mark Gosewehr - Fig. 4 : A camera checks that the 85 contact segments are correctly positioned. Only then is the strip carrying the segments fed automatically into the injection mold En ligne : https://drive.google.com/file/d/18XCnYh78DhDqGD2R27EUmRK0zWDoOM7M/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36162 [article]

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