成人精品久久久_极品一线天粉嫩虎白馒头 _日韩a毛片免费全部播放完整_亚洲一区二区三区四区五区

濟南模具加工  http://m.tco925.cn/殘余應力主要由于以下三種情況，即充填過剩、脫模推出和金屬鑲嵌件造成的。作為在充填過剩的情況下產生的龜裂，濟南模具加工廠認為其解決方法主要可在以下幾方面入手。The residual stress of die processing in Ji'nan is mainly due to the following three conditions, that is, excess filling, demoulding and metal inlay. As in the case of excess filling cracks, Ji'nan mold factory that its main solution can start in the following aspects. 

1.由于直澆口壓力損失最小，所以，如果龜裂最主要產生在濟南模具加工直澆口附近，則可考慮改用多點分布點澆口、側澆口及柄形澆口方式。 The sprue with minimum pressure loss, so, if the crack is mainly produced in Ji'nan near the mold gate, you can consider to multipoint distribution point gate and side gate and handle gate way.

2.在保證樹脂不分解、不劣化的前提下，適當提高樹脂溫度可以降低熔融粘度，提高流動性，同時也可以降低注射壓力，以減小濟南模具加工的應力。Under the premise of ensuring that the resin is not decomposed and not deteriorated, the resin viscosity can be reduced by increasing the temperature of the resin, the fluidity is improved, and the injection pressure can be reduced so as to reduce the stress of the processing of the die in Ji'nan. 

3.一般情況下，濟南模具加工的模溫較低時容易產生應力，應適當提高溫度。但當注射速度較高時，即使模溫低一些，也可減低應力的產生。Under normal circumstances, the mold temperature in Ji'nan mold processing is easy to produce stress, should be appropriate to raise the temperature. However, when the injection rate is high, even if the mold temperature is low, it can reduce the stress. 
濟南模具加工廠認為，注射成型的同時嵌入金屬件時，最容易產生應力，而且容易在經過一段時間后才產生龜裂，危害極大。這主要是由于金屬和樹脂的熱膨脹系數相差懸殊產生應力，而且隨著時間的推移，應力超過逐漸劣化的樹脂材料的強度而產生裂紋。Ji'nan mold factory, injection molding and embedded metal parts, the most prone to stress, and easily after a period of time after the great harm of cracks. This is mainly due to the difference in thermal expansion coefficient between the metal and the resin to produce stress, and over time, the stress exceeds the strength of the gradual deterioration of the resin material and crack.