Science shows that plastics are more active in aluminum injection molds
It is reported that aluminum injection molds can provide a shorter cycle time than P20 steel molds. One explanation is that aluminum has a higher thermal conductivity, causing the mold surface to heat up rapidly after contact with the melt, so that it solidifies less near the mold wall and fills the mold faster. In the MoldMaking Expo 2008 exhibition held in April 2008, a technical paper revealed its principle. The paper's authors, Aluminum Injection Mold's David Bank, Dave Klafehn, and Alcoa Forged Products' Ron Smierciak, used a spiral-flow mold made of P20 steel and alcoa's QC-10 aluminum sheet for A variety of resin molding. Unexpectedly, there is no significantly different length of activity under the same processing conditions. In order to simulate the real machining process, they ensured that the spiral moving mold was completely covered during the test. The PS and nylon materials used were all around the highest and lowest temperatures of their recommended melting temperature range, and the cycle time was carried out. optimization. When the melt is injected into the mold, the temperature sensor shows a sharp peak in the surface temperature of the mold, followed by a slower cooling process. For the P20 steel mold, the cooling time is longer and the mold base temperature is gradually improved over repeated production cycles, while the aluminum mold shows less baseline temperature rise. Since the QC-10 aluminum mold can be quickly and almost completely restored to the set temperature point of the mold, the cycle time of the PS in the aluminum mold is shortened by 30% to 44%, and the cycle time of the nylon is shortened by 8% to 12.5. %.
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