Recently, Sumitomo Heavy Industries Co., Ltd. has developed the SE130EV-HD Special Package, an injection molding machine that supports the metal-resin joint technology "NMT," and is present at the "International Plastics Fair (IPF Japan) 2014" (October 28 to November 1 , Makuhari Messe Exhibition Center) on display. At the exhibition, Sumitomo Heavy Industries Co., Ltd. demonstrated the process of installing aluminum alloy components into molds, injecting polyamide (PA) 6, and manufacturing automotive parts in which metal and resin are firmly joined.
NMT is a bonding technology developed by Taisei PLAS (Headquarters: Tokyo). First, a unique surface treatment is performed on the metal to form fine pores (several tens of nanometers), and then insert molding is performed while the metal part is heated, and the resin enters the pores of the metal part to manufacture a firm bond. One piece together.
The injection molding machine exhibited by Sumitomo Heavy Industries added a mechanism to heat the embedded metal parts on the basis of the original injection molding machine, and used a coil-shaped induction heating device. During the demonstration, the aluminum alloy tube was inserted into the heating device to heat it, and it was set in the mold to inject the PA. The molded article is envisaged for use as a reinforcement component for automotive dashboards.
In addition, NMT applicable metals are aluminum alloys, magnesium, iron, stainless steel, copper, brass and titanium, and the applicable resins are PA6, polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), Polyacrylic acid (PPA) and PA66.
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