開放式熱流道的結(jié)構(gòu)一般都是比較簡(jiǎn)單的，適用于微型半熱流道，一般都是不能用在絕熱流道，絕熱流道對(duì)材料的局限性較高，而且直接接觸到產(chǎn)品表面，易出現(xiàn)拉絲和泄露，表面質(zhì)量差；微型半熱流道不接觸產(chǎn)品而是接觸到微小流道，所以可以使用開放式熱噴嘴，在國(guó)外的高精密模具中應(yīng)用較多。
The structure of open hot runner is generally relatively simple, suitable for micro-semi-hot runner, generally can't be used in hot runner, hot runner has high material limitation, and directly contacts the surface of the product, which is prone to wire drawing and leakage, and the surface quality is poor. The micro semi-hot runner does not contact the product but contacts the micro runner, so it can use the open hot nozzle and is widely used in high precision molds abroad.
