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The Injection Molding Technology of PP Material in Plastic Mold

Today is September 19, soon to meet the celebration of the Mid-Autumn Festival festivals. And Dongguan Plastic mold factory friends, you busy this time? I am in the mold factory is really busy to dawn and dark, in order to have a good holiday, we also decided to work from today evening from time to time a little longer. Well, though so busy but the editor I still take the time for everyone to update the PP material in the plastic mold in the injection molding process.

Drying: Drying is not required if stored properly.

Melting temperature: 220 ~ 275 ℃, be careful not to exceed 275 ℃.

Mold temperature: 40 ~ 80 ℃, it is recommended to use 50 ℃. The degree of crystallization is mainly determined by the mold temperature.

Injection pressure: up to 1800 bar.

Injection speed: Typically, the use of high-speed injection can reduce the internal pressure to a minimum. If a defect occurs on the surface of the product, low-speed injection at higher temperatures should be used.

Runners and gates: For cold runners, the typical flow path diameter range is 4 to 7 mm. It is recommended to use a circular inlet and a flow path. All types of gates can be used. A typical gate diameter range is 1 to 1.5 mm, but a gate with a size of less than 0.7 mm can also be used. For edge gates, the minimum gate depth should be half the wall thickness; the minimum gate width should be at least twice the wall thickness. PP material can use hot runner system.

Molding time: injection time 20s ~ 60s

         High pressure time 0s ~ 3s

         Cooling time 20s ~ 90s

         The total period of 50s ~ 160s



Note: The above information from the Jiezheng mold  finishing  on the Internet, welcome reproduced, indicate the source!

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