Effects of molding conditions on injection molded direct joining under various surface fine-structuring

Kimura, Fumihiko; Kadoya, Shotaro; Kajihara, Yusuke

doi:10.1007/s00170-018-3154-8

Cited by 26 publications

(6 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kimura et al [ 91 ] fabricated single‐lap joints of glass‐fiber reinforced poly(butylene terephthalate) (PBT‐30GF) and 5052 aluminum alloy, treating the metal substrates with AMALPHA and Nano Molding Technology (NMT) chemical etchings, and analyzed the effects of injection speed and metal surface structure size on the joining strength. AMALPHA and NMT treatments generated, respectively, cube‐like‐structured features of 10 μm and a sponge‐like structure with a pore diameter of 20 nm.…”

Section: Correlation Between Metal Surface Preparation Methods Proces...mentioning

confidence: 99%

Injection overmolding of polymer‐metal hybrid structures: A review

Vasconcelos

Oliveira

Amancio‐Filho

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

Polymer‐metal hybrid (PMH) structures, also known as metal‐polymer hybrid (MPH) structures, have received considerable attention from industry and academia due to the societal need for developing strong, lightweight, and durable structures for several applications in strategic areas, such as transportation, household appliances, energy, and biomedical devices. Injection overmolding is an advantageous technique for manufacturing PMH structures as it combines automation, a fast process, cost efficiency, and dimensional accuracy. This review presents a comprehensive discussion of recent advances reported in the literature concerning PMH structures fabricated by direct‐adhesion injection overmolding. Following a general introduction, the fundamentals of the injection overmolding technique are presented. Next, the potential of some metal surface preparation methods to ensure good adhesion, and thus outstanding mechanical performance in injection overmolded PMH structures is discussed. Correlations are then made between metal surface features, processing parameters, and the mechanical strength of injection overmolded polymer‐metal joints. Some applications of injection overmolded PMH structures are explored, and, lastly, the main conclusions and prospects on the use of injection overmolding are presented.

show abstract

Section: Correlation Between Metal Surface Preparation Methods Proces...mentioning

confidence: 99%

Injection overmolding of polymer‐metal hybrid structures: A review

Vasconcelos

Oliveira

Amancio‐Filho

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…Other hands, flow behaviour of route B shows the corner flow. Kimura et al [18] examined the same influence of runner route, and orientation of glass fibre in injection resin was observed through X-ray tomography. The glass fibres aligned as curve shape along the flow path which melted polymer composites enter from the side of joining area (like route B in this experiment).…”

Section: Single-lap Shear Testmentioning

confidence: 99%

“…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

View full text Add to dashboard Cite

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).

show abstract

“…Most research on nano-injection moulding has focused on developing surface treatment methods [3][4][5][6][7][8][9][10][11] for roughening the metal surface in a way that improves the adhesion between the polymer matrix and metal [12]. Many complex and fine nanostructures have been fabricated on metal surfaces, such as holes [13], crevices [14], pores [3,[15][16][17][18], concaves [16], pillars [19], pits [20], grooves [21], and cavities [12,22,23]. The joint strength of polymer/metals is greatly enhanced by the strong interaction energies and anchoring effects generated by polymer flow into the nanostructures [6,7,24].…”

Section: Introductionmentioning

confidence: 99%

Simulating the replication and entanglement of semi-rigid polymers in nano-injection moulding

Jiao,

2024

Modelling Simul. Mater. Sci. Eng.

View full text Add to dashboard Cite

Many polymers have been used to design polymer/metal composite structures with high bond strength through nano-moulding technology. However, whether high-molecular-weight polymers flow deeply into nanostructures and whether polymer entanglement hinders complete infiltration remain contentious issues in theoretical studies. In this study, the effects of the injection pressure, molecular weight of the semi-rigid polymer [polyphenylene sulfide (PPS)], and nanostructure size of the metal surface on the replication quality were investigated by molecular dynamics simulations. Increasing the injection pressure and polymer molecular weight increased the replication quality at practical temperatures. PPS with various chain lengths could completely infiltrate the nanopores. The nanostructure size of the metal surface was weakly negatively correlated with the filling rate, but it was substantially negatively correlated with the infiltration behaviour of the entire PPS chain. The reasons for infiltration of long-chain PPS and the steady evolution of the entanglement density were investigated. The steady entanglement density of PPS indicates that entanglement is not the main reason for the low filling rate. From the mobility of a single chain, the PPS chain flows into nanopores in a snake-like fashion. These results provide new insights to improve the adhesion strength between polymers and metals in nano-injection moulding.

show abstract

Effects of molding conditions on injection molded direct joining under various surface fine-structuring

Cited by 26 publications

References 26 publications

Injection overmolding of polymer‐metal hybrid structures: A review

Injection overmolding of polymer‐metal hybrid structures: A review

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

Simulating the replication and entanglement of semi-rigid polymers in nano-injection moulding

Contact Info

Product

Resources

About