所谓双色模具指的是两种塑胶材料在同一台注塑机上注塑,分两次成型,但是产品只出模一次的模具。一般这种模塑工艺也叫双料注塑,通常由一套模具完成,且需要专门的双色注塑机。在使用时,为了得到更好的制造效果,我们需要了解以下相关技术要点。
The so-called double color mould refers to two kinds of plastic material in the same injection molding machine injection molding, two forming, but the product out of the mold only once the mold. This is also called the double injection molding process, usually performed by a set of mould, and need special double color injection molding machine. When use, in order to get better effect, we need to know the following related technical key points.
1.Cavity的两个形状是不同的,分别成型1种产品。而Core的两个形状完全一样。
1. The subject of two different shape, respectively, forming one kind of product. And the Core of the two shapes are exactly the same.
2.模具的前、后模以中心旋转180o后,必须吻合。设计时必须做这个检查动作。
2. Mold to center before and after rotate for 180 o, must be identical. When the design must do the check.
3.注意顶针孔的位置,最小距离210mm。大的模具须适当增加顶棍孔的数量。并且,由于注塑机本身附带的顶针不够长,所以我们的模具中必须设计加长顶针,顶针长出模胚底板150mm左右。后模底板上必须设计2个定位圈。
3. Pay attention to the location of the pinhole, the minimum distance is 210 mm. Big mould must be appropriate to increase the number of top outs. And, as a result of injection molding machine itself with thimble not long enough, so our mould must be designed in the extension thimble, thimble grow mold base plate is about 150 mm. Two (2) location ring die floor must be designed.
4.前模面板加A板的总厚度不能少于170mm。请仔细查看这种型号的注塑机的其它参考数据,比如,最大容模厚度、最小容模厚度、顶棍孔距离等。
4. The front mould panel and the total thickness of A plate may not be less than 170 mm. Please take a closer look at this type of injection molding machine of other reference data, for example, the maximum thickness of molar, the minimum thickness of molar, top stick hole distance, etc.
5.三板模的水口最好能设计成可以自动脱模动作。特别要注意软胶水口的脱模动作是否可。
5. Three board of shuikou better designed to automatically from the action. Special attention should be paid to the demoulding soft glue at the mouth of the action can.
6.前侧SPRUE的深度不要超过65mm。上侧(大水口)SPRUE的顶部到模胚中心的距离不小于150mm。
6. The depth of the SPRUE does not exceed 65 mm of the side. The top of the upper (gate) SPRUE to mold center distance of not less than 150 mm.
7.在设计第二次注塑的CAVITY时,为了避免CAVITY插(或擦)伤第一次已经成型好的产品胶位,可以设计一部分避空。但是必须慎重考虑每一处封胶位的强度,即:在注塑中,是否会有在大的注塑压力下,塑胶发生变形,导致第二次注塑可能会有批锋产生的可能!
7. When designing the second injection molding CAVITY, in order to avoid the CAVITY insert (or brush) adhesive has good product for the first time, part can be designed to avoid empty. But must be considered every seal adhesive strength, namely: in the injection molding, injection pressure, will there be in the big plastic deformation occurs, leading to the second injection may be produced there may be a batch of feng!
8.注塑时,第一次注塑成型的产品尺寸可以略大,以使它在第二次成型时能与另一个CAVITY压得更紧,以达到封胶的作用。
8. When we do the injection, the first of the injection molding product size can be slightly larger, to make it the second time molding can with another CAVITY pressure more tightly, in order to achieve the effect of sealing glue.
9.注意在第二次注塑时,塑胶的流动是否会冲动第一次已经成型好的产品,使其胶位变形?如果有这个可能,一定要想办法改善。
9. Pay attention to in the second when we do the injection, the flow of the plastic will impulse has good product for the first time, the plastic deformation? If there's a possibility, must find a way to improve.
10.在A、B板合模前,要注意前模Slider或Lifter是否会先复位而压坏产品?如此,必须想办法使在A、B板先合模,之后前模的SLIDER或LIFET才能复位。
10. In front of the A and B plate clamping, attention should be paid to die before the Slider or Lifter will reset and crush the product first? So, we must think of some way to make the A and B plate clamping first, after the former mode of the SLIDER or LIFET to reset.
11.两CAVITY和CORE的运水布置尽量充分,并且均衡、一样。
11. The two CAVITY and CORE water arrangement as far as possible fully, and balanced, the same.
12.99%的情况是先注塑产品的硬胶部分,再注塑产品的软胶部分。因为软胶易变形。
12.99% of the time is hard plastic part of the first injection products, injection products again soft rubber parts. Because the soft rubber easy deformation.
