Influence of the mold temperature on the material properties and the vibration welding process of crosslinked polyamide 66

Leisen, Christoph; Wolf, Michael; Drummer, Dietmar

doi:10.1002/pen.24636

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…The filling of the polymer melt in the cavity also depends on the mold temperature, due to the temperature difference between the mold insert and the polymer melt. When the polymer melt flows into the spiral channel, the energy of the melt is transferred to the mold insert via heat conduction [ 28 , 29 ], resulting in a decreased melt temperature and therefore a limited flowability. An increased mold temperature can effectively delay the energy loss of the polymer melt and increase the filling length.…”

Section: Resultsmentioning

confidence: 99%

Characterization of the Fluidity of the Ultrasonic Plasticized Polymer Melt by Spiral Flow Testing under Micro-Scale

et al. 2019

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The fluidity of a molten polymer plasticized by ultrasonic vibration was characterized by spiral flow testing based on an Archimedes spiral mold with microchannels. Mold inserts with various channel depths from 250 to 750 µm were designed and fabricated to represent the size effect under micro-scale. The effect of ultrasonic plasticizing parameters and the mold temperature on the flow length was studied to determine the rheological nature of polymers and control parameters. The results showed that the flow length decreased with reduced channel depth due to the size effect. By increasing ultrasonic amplitude, ultrasonic action time, plasticizing pressure, and mold temperature, the flow length could be significantly increased for both the amorphous polymer polymethyl methacrylate (PMMA) and the semi-crystalline polymers polypropylene (PP) and polyamide 66 (PA66). The enhanced fluidity of the ultrasonic plasticized polymer melt could be attributed to the significantly reduced shear viscosity.

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Section: Resultsmentioning

confidence: 99%

Characterization of the Fluidity of the Ultrasonic Plasticized Polymer Melt by Spiral Flow Testing under Micro-Scale

et al. 2019

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“…Both ultrasonic and vibration methods are quite easy and applicable for automation, they are cheap and provide fast cycle (Leisen, 2017;Benatar, 2015). The methods simply based on heat generation from frictional force and then joining the parts under the pressure (Pal, 2016;Parmar, 2016).…”

Section: Figurementioning

confidence: 99%

“…The key of the solving this problem is basically based on dividing the complex part geometry into two or more parts, then consolidating them in one piece by using a suitable plastic welding method (Arabaci, 2022). The methods do not change the material chemical structure and need for the chemical materials to join the parts (Leisen, 2017). Figure 1 shows the polymer welding types (Grewell, 2007).…”

Section: Introductionmentioning

confidence: 99%

Plastik Birleştirme Yöntemleri: Ultrasonik ve Vibrasyon Kaynağı

KIYILI

2023

UUJFE

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Plastic welding is a common method for manufacturing parts that can’t be molded and has a complex geometry such as the part that has undercuts. The process is suitable for mass production, cheap and meets automotive requirements. The process helps the zero-emission target of the automotive industry, due to the biggest obstacle of the plastic use in this sector was the moldability of the complex geometries. Most of the engine parts such as thermostat, water pump etc. can’t be molded as one piece. These engine components are manufactured by helping the plastic welding and decrease the weight of the automobile, therefore, improving fuel efficiency. Plastic welding technology has become more important especially in electrical vehicles, because metal to plastic replacement has a significant role in decreasing the weight of the vehicle. Selecting the welding method according to the polymer properties and the geometry of parts are the most important factors for the application area. All of the welding methods are basically based on the remelting of the welding surfaces of the parts and the consolidation of them under the pressure. In this paper, the vibration welding and the ultrasonic welding methods have been inspected. The most effective parameters of both processes have been discussed and shown.

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“…The cavity of the plasticizing chamber is a cylinder with a diameter of 10 mm and a height of 45 mm. The mold temperature has a significant influence on the melt fluidity [27,28] but has little effect on the plasticizing process. Therefore, the influence of the mold temperature in the plasticized process is ignored in this paper.…”

Section: Equipmentmentioning

confidence: 99%

Evolution of Interfacial Friction Angle and Contact Area of Polymer Pellets during the Initial Stage of Ultrasonic Plasticization

et al. 2019

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Interfacial friction heating is one of the leading heat generation mechanisms during the initial stage of ultrasonic plasticization of polymer pellets, which has a significant influence on the subsequent viscoelastic heating according to our previous study. The interfacial friction angle and contact area of polymer pellets are critical boundary conditions for the analysis of interfacial frictional heating of polymer pellets. However, the duration of the interfacial friction heating is extremely short in ultrasonic plasticization, and the polymer pellets are randomly distributed in the cylindrical barrel, resulting in the characterization of the distribution of the interfacial friction angle and contact area to be a challenge. In this work, the interfacial friction angle of the polymer pellets in the partially plasticized samples of polymethyl methacrylate (PMMA), polypropylene (PP), and nylon66 (PA66) were characterized by a super-high magnification lens zoom 3D microscope. The influence of trigger pressure, plasticizing pressure, ultrasonic amplitude, and vibration time on the interfacial friction angle and the contact area of the polymer pellets were studied by a single factor experiment. The results show that the compaction degree of the plasticized samples could be enhanced by increasing the level of the process parameters. With the increasing parameter level, the proportion of interfacial friction angle in the range of 0–10° and 80–90° increased, while the proportion in the range of 30–60° decreased accordingly. The proportion of the contact area of the polymer pellets was increased up to 50% of the interfacial friction area which includes the upper, lower, and side area of the cylindrical plasticized sample.

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Influence of the mold temperature on the material properties and the vibration welding process of crosslinked polyamide 66

Cited by 5 publications

References 9 publications

Characterization of the Fluidity of the Ultrasonic Plasticized Polymer Melt by Spiral Flow Testing under Micro-Scale

Characterization of the Fluidity of the Ultrasonic Plasticized Polymer Melt by Spiral Flow Testing under Micro-Scale

Plastik Birleştirme Yöntemleri: Ultrasonik ve Vibrasyon Kaynağı

Evolution of Interfacial Friction Angle and Contact Area of Polymer Pellets during the Initial Stage of Ultrasonic Plasticization

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