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現(xiàn)如今，濟(jì)南注塑加工的技術(shù)已經(jīng)相當(dāng)成熟，從事濟(jì)南塑料外殼加工的企業(yè)更是越來(lái)越多。但是，濟(jì)南塑料外殼加工畢竟是一件相當(dāng)復(fù)雜的事，其間還是會(huì)出現(xiàn)一些小問(wèn)題的。下面我們便來(lái)簡(jiǎn)單介紹下濟(jì)南注塑加工的外殼加工表面縮水的原因。Today, Ji'nan injection molding technology has been quite mature, engaged in the processing of plastic shell Tianjin enterprises are more and more. However, the Ji'nan plastic casing processing is a very complex thing, after all, there will be some small problems. Here we will briefly introduce the Ji'nan injection molding processing shell surface shrinkage causes.

濟(jì)南注塑加工表面縮水是在塑料外殼的表面發(fā)生凹坑狀，一般出現(xiàn)在體積收縮量較大的肉厚部位。塑料外殼在冷卻的過(guò)程中，發(fā)生體積收縮，由此發(fā)生向中心部收縮的拉拽力。Ji'nan injection molding is shrinking surface concave on the surface of the plastic shell, generally appear in the flesh part of large volume shrinkage. During the cooling process, the plastic shell has a volume contraction, and thus the pulling force which is contracted to the center part is generated.

此時(shí)受到表面冷料層的剛性和樹(shù)脂收縮力之間平衡性的影響，冷料層較弱時(shí)，向塑料外殼中心部發(fā)生拉拽力，出現(xiàn)在產(chǎn)品表面上表現(xiàn)為凹陷狀。冷料層較強(qiáng)時(shí)，塑料外殼的中心部位會(huì)產(chǎn)生真空氣泡。At the same time, the effect of the balance between the rigidity of the surface cold material layer and the shrinkage force of the resin is affected, and the pulling force of the central part of the plastic shell is weak when the cold material layer is weak. When the cold material layer is strong, the central part of the plastic shell will produce vacuum bubbles.

濟(jì)南注塑加工廠家認(rèn)為，在肉厚較厚區(qū)域，冷料表層的剛性和樹(shù)脂收縮力的平衡性與塑料外殼表面的冷卻速度息息相關(guān)，冷卻速度較快時(shí)形成真空氣泡。相反，較慢時(shí)形成縮水。另外，冷卻速度變慢，體積收縮差會(huì)變小，縮水狀況也會(huì)變小。Ji'nan plastic processing factory, in the thick thick area, the cooling speed and the surface of the plastic shell of the surface of the rigid and cold material balance resin shrinkage force is closely related to the cooling rate of vacuum bubble formation. On the contrary, the slow formation of shrinkage. In addition, the cooling rate is slow, the volume contraction difference will become smaller, shrink situation will become smaller.