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濟(jì)南模具加工  http://m.stv6.org.cn/殘余應(yīng)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(chǎn)生的龜裂，濟(jì)南模具加工廠認(rèn)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(chǎn)生在濟(jì)南模具加工直澆口附近，則可考慮改用多點(diǎn)分布點(diǎn)澆口、側(cè)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(dāng)提高樹脂溫度可以降低熔融粘度，提高流動(dòng)性，同時(shí)也可以降低注射壓力，以減小濟(jì)南模具加工的應(yīng)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(jì)南模具加工的模溫較低時(shí)容易產(chǎn)生應(yīng)力，應(yīng)適當(dāng)提高溫度。但當(dāng)注射速度較高時(shí)，即使模溫低一些，也可減低應(yīng)力的產(chǎn)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(jì)南模具加工廠認(rèn)為，注射成型的同時(shí)嵌入金屬件時(shí)，最容易產(chǎn)生應(yīng)力，而且容易在經(jīng)過一段時(shí)間后才產(chǎn)生龜裂，危害極大。這主要是由于金屬和樹脂的熱膨脹系數(shù)相差懸殊產(chǎn)生應(yīng)力，而且隨著時(shí)間的推移，應(yīng)力超過逐漸劣化的樹脂材料的強(qiáng)度而產(chǎn)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.