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水玻璃砂、樹脂砂、覆膜砂的差別
來源: | 作者:hkw935742 | 發布時間: 2021-06-28 | 83 次瀏覽 | 分享到:

  水玻璃砂、樹脂砂、覆膜砂的差別:

  主要是因選用的粘結劑、環氧固化劑不同,因此生產制造加工工藝不同。水玻璃砂:用水玻璃做粘結劑與石英砂按對應的占有率混制成產品造型設計砂,建成型后吹CO2凝固,接著起模、合箱、澆筑成鑄造件。

  樹脂砂:用環氧樹脂做粘結劑(要加環氧固化劑)與石英砂按對應的占有率混制成產品造型設計砂,建成型后常溫狀態下自然而然凝固,接著起模、合箱、澆筑成鑄造件。

  覆膜砂:將石英砂升溫后放入混砂機,加上環氧樹脂、環氧固化劑、防結劑,使石英砂表層覆1層環氧樹脂膜,混制均勻后釋放冷卻破碎備用。選用時要升溫凝固。


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