In the small batch production of injection molds in Jinan, due to the color matching and molding of toner and masterbatch, the color is uneven, resulting in serious fee reporting. If it is a mass production, there will be no color difference if the granular material is used. In addition, there are many phenomena that should be avoided. Let's talk about them.
It is mainly due to the poor strength and accuracy of the mold, the unstable operation of the injection machine and the unstable forming conditions, which make the size change of the plastic parts unstable. The main reason is that the molding cycle of each mold is inconsistent and the product size is unstable when the parts are taken manually.
由于融料內(nèi)充氣過多或排氣不良而導(dǎo)致塑件內(nèi)殘留氣體
，并呈體積較小或成串的空穴(注意應(yīng)與真空泡區(qū)別)
。主要是量產(chǎn)中，由于料粉將排氣槽堵住
，造成排氣不夠
，產(chǎn)品內(nèi)部或局部就會(huì)產(chǎn)生氣泡或燒焦。
The residual gas in the plastic part is caused by excessive inflation or poor exhaust in the molten material, and is in the form of small volume or string of cavities (note that it should be distinguished from vacuum bubbles). The main reason is that in mass production, the exhaust slot is blocked by the material powder, resulting in insufficient exhaust, and bubbles or scorching will occur in the product or locally.
Due to poor mold closing, too large gap, too good plastic fluidity, and too much feeding, the plastic parts extrude extra sheets along the edge.
Due to the low material temperature and the incompatibility between resin and attachments when the molten materials are separated and merged, the fusion of the molten materials is poor, and obvious fine seam lines are generated along the surface or inside of the plastic parts.
Because the melt does not flow neatly along the mold surface to fill the cavity, but flows in a semi solidified wave shape on the cavity surface or the melt has stagnant flow.
