第一百三十六章 铁模铸炮
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隔日，魏王和浩浩荡荡的船队离开了青州码头。龙腾小说ltxs520.comΩ猎Ω文网wΔwΔlwc
萧铭有些羡慕地望着魏王的船队，不知道什么时候自己的青州城也能有这样一只雄壮的船队。
在青州的造船坊中他的盖伦船还在紧张施工中，只希望年底的时候真的如张梁所言能够得到三艘盖伦战船。
到时候再把火炮安置在盖伦船上，在这个风帆战舰的时代，他等于也迈入了大海一步。
不过想到火炮，他顿时又头大起来，这战场上需要的火炮数量同样不少，又是一笔沉重的负担，如此看来，这训练一只强大的狐还真的是需要往里面不断砸钱呀。
送了魏王，萧铭直接去了器械司。
此时陈琦正带着匠人在铸造铁模，脑子里的科技库满是火炮的铸造方法。
萧铭自然不会去走前人走过的弯路，他这次采用的铸炮方法正是铁模铸炮法，这种铁模铸造的办法其实古已有之。
但是被采用拿来铸造火炮却是到了清朝。
这种方法其实没有什么技术难度，唯有现在的匠人根本无法想到这个办法。
所有有时候难得不是技术，而是现技术。
现在萧铭将完整的铁模铸炮技术教给了陈琦等人，对这些熟练的匠人来说，摸索一下进行尝试，这铁模铸炮法掌握也只是时间问题。
“殿下，现在我们正在制造泥炮胚。”陈琦看见萧铭过来，立马走了过来。
这次铸造火炮的事情让他几天几夜都没睡好，日夜思索萧铭教给他的办法。
而火炮这种萧铭口中的武器更是让他兴奋莫名，如萧铭所说，如果火炮筑造出来，他陈琦足以名留青史了。
可是这些日子他带领匠人尝试铸造火炮以来才现这火炮的制造不是那么简单，如今只是这炮模便失败了几次了。
望着一地失败的泥炮胚，萧铭说道：“又失败了？”
陈琦的神色有些疲惫，面带愧色，“殿下，这一开始匠人手生，这泥炮胚总是塑形失败，现在熟练了一些，我想这次差不多了。”
萧铭点了点头，看向正在制造泥炮胚的匠人。
这铁模铸炮先要按铁炮大小，分4—7节，作出泥炮，接着按泥炮节数分制铁模泥型，每节泥型分成两瓣，用车板旋制内面，使表面光洁，形状规整，然后烘干备用。
泥型内放入预制的把手，浇注时和铁模铸成一体。
接着用泥型翻铸铁模时，先将炮口那一节倒置在泥制平板上，用泥充填其中一瓣，烘干后，盖上泥制平板，将型箍紧，浇注后便得到第一节铁模的一瓣。
然后除去填泥，又可如法铸得另一瓣铁模。这样逐节浇注，就可铸成层层榫合的整套铁模。
最后用铁模铸造铁炮时，先在模的内表面刷上用细稻壳灰与细砂泥加水和成的涂料，再涂刷极细煤粉调制的第二层涂料，然后箍紧铁模，烘热、装配泥芯，浇入铁水。待凝固后，立即脱去铁模，趁炮身还是红热时，清除毛刺，除净泥芯，得到成品火炮。
不过这次为了让火炮的炸膛率降低，他准备采用空心陶芯代替泥芯，在空心陶芯中注水的办法让炮管内的铁冷却。
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