| 摘要 |
It is known to harden foundry cores by admixing a polymerizable material therewith and then curing by addition of a catalyst. Means are provided for injecting gaseous catalysts and compressed air, sequentially, into the die which contains the admixture of polymerizable material and foundry core material. In accordance with the invention, the gaseous catalyst and compressed air respectively, are injected into the die containing the mixture of foundry material in measured desired amounts and very rapidly.
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