Effects of molding conditions on injection molded direct joining using a metal with nano-structured surface

Kimura, Fumihiko; Kadoya, Shotaro; Kajihara, Yusuke

doi:10.1016/j.precisioneng.2016.02.013

Cited by 77 publications

(25 citation statements)

References 19 publications

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“…Nanostructuring the surface of aluminum inserts was applied by Kimura et al [11]. Since it was challenging to form the surface structures at a nanometer scale by using abrasive blasting or laser processing, chemical processing was applied via nanomolding technology [12] to create nanostructures on the surfaces of A5052 aluminum alloy pieces for joining experiments.…”

Section: Introductionmentioning

confidence: 99%

Deformation Mechanism in Mechanically Coupled Polymer–Metal Hybrid Joints

et al. 2020

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In this, work, metal inserts were joined with polyamide 6 by using the injection-molding technique. The metal parts, made of steel grade DC 04, were mechanically interlocked with polyamide 6 (PA6) by rivets as a mechanical connection between both components in the form of s polymer filling the holes in the metallic parts. The mechanical-interlocking joints made of steel/PA6 were mechanically tested in a tensile-lap-shear test. The damage behavior of the joined materials in relation to rivet number and position on the metal plate was studied. The observation of rivet deformation was also conducted by infrared IR thermography. The study showed that, for polymer–metal joined samples with fewer than three rivets, the destruction of rivets by shearing meant sample damage. On the other hand, when the polymer–metal joint was made with three or four rivets, the disruption mechanism was mostly related to the polymer part breaking. The maximal values of the joint’s failure force under tensile-shear tests were achieved for samples where three rivets were used. Moreover, strong correlation was found between the surface temperature of the samples and their maximal force during the tensile-lap-shear test.

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Section: Introductionmentioning

confidence: 99%

Deformation Mechanism in Mechanically Coupled Polymer–Metal Hybrid Joints

et al. 2020

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“…The combination of mechanical interlocking by surface roughness and anchor role by glass fibres could enhance the lap-shear strength. Kimura et al [18], [19] formed nano-porous structure on the surface of A 5052 Al by chemical etching process, and glass fibre reinforced polybutylene terephthalate (PBT) was moulded onto Al substrate part. They reported nanometer-scale structure enables to increase lap-shear strength by compared with micrometer-scale structure.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nanofiber Loading and Moulding Conditions on the Joining Strength of Thermoplastic Composites Fabricated by Injection Over-Moulding Process

Matsumoto

Nagasaka

Takemura

et al. 2020

WIT Transactions on the Built Environment

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An over-moulding process has promised a novel technology for joining lightweight thermoplastic composites with metal or polymer composite parts. Specifically, the substrate parts (metal or textile composites) are put into a mould of the injection moulding machine and melt polymer is injected onto substrate parts. This over-moulding process provides great benefits in terms of fast welding and moulding at the same time. However, the interfacial joining strength of over-moulded parts is still unreliable, and it has a strong dependence on surface treatment of substrate and moulding conditions. The key topic of this joining process is to achieve a reliable joining strength. In this study, we focused on using cellulose nanofiber (CNF) to interconnect between substrate and injection part by purpose of mechanical interlocking in nanoscale. Furthermore, joining strength was determined by single-lap shear test to examine the effect of presence of nanofiber. The single-lap joint consists of plain weave carbon fibre (CF) reinforced polypropylene (PP) composites (CFRPP) as substrate part and pure PP as overinjection polymer. To place the cellulose nanofiber at the interface, CF wovens and PP sheets were stacked alternately, and CNF contained PP sheet was placed at outer layer. The CFRPP substrate was obtained by heating press, pure PP was injected onto the substrate at the side of presence of CNF. This study was investigated on the influence of process conditions (i.e., injection temperature and runner route) and CNF content ratio (up to 3.0 wt%) on the shear strength as joining strength. Furthermore, the fracture morphology was observed through scanning electron microscope (SEM).

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“…Nevertheless, polymer and plastic products have the disadvantages of low mechanical strength, poor dimensional and thermal stability. By combing the advantages of metal and polymer materials, the polymer-metal hybrid structure can greatly reduce the weight of components while ensuring the structural strength, which in turn saves cost and subsequently fuel consumption [ 1 , 2 , 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Atomistic Investigation on the Wetting Behavior and Interfacial Joining of Polymer-Metal Interface

Zhou

Jiang

et al. 2020

Polymers

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Polymer-metal hybrid structures can reduce the weight of components while ensuring the structural strength, which in turn save cost and subsequently fuel consumption. The interface strength of polymer-metal hybrid structure is mainly determined by the synergistic effects of interfacial interaction and mechanical interlocking. In this study, the wetting behavior of polypropylene (PP) melt on metal surface was studied by molecular dynamics simulation. Atomistic models with smooth surface and nano-column arrays on Al substrate were constructed. Influences of melt temperature, surface roughness and metal material on the wetting behavior and interfacial joining were analyzed. Afterwards the separation process of injection-molded PP-metal hybrid structure was simulated to analyze joining strength. Results show that the initially sphere-like PP model gradually collapses in the wetting simulation. With a higher temperature, it is easier for molecule chains to spread along the surface. For substrate with rough surface, high density is observed at the bottom or on the upper surface of the column. The contact state is transitioning from Wenzel state to Cassie–Baxter state with the decrease of void fraction. The inner force of injection-molded PP-Fe hybrid structure during the separation process is obviously higher, demonstrating a greater joining strength.

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Effects of molding conditions on injection molded direct joining using a metal with nano-structured surface

Cited by 77 publications

References 19 publications

Deformation Mechanism in Mechanically Coupled Polymer–Metal Hybrid Joints

Deformation Mechanism in Mechanically Coupled Polymer–Metal Hybrid Joints

Influence of Nanofiber Loading and Moulding Conditions on the Joining Strength of Thermoplastic Composites Fabricated by Injection Over-Moulding Process

Atomistic Investigation on the Wetting Behavior and Interfacial Joining of Polymer-Metal Interface

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