Excuse me: what are the differences between injection molding and extrusion?
The following answer is very good, I'm adding. 1, injection = injection molding machine + injection mold; extrusion = extrusion + mouth mold, core mold + cooling trough. Among them, the injection molding machine and extruder, almost all of the plastic melt. The difference is in the mold: injection mold, there is the upper and lower mold, together, inside the processing cavity, and that is the same shape as the product. The plastic particles melt into the closed mold cavity, cool down, open the mold and take out the product.
Injection molding machine is by injecting plastic particles into the closed cavity, filled with the cavity after the suspension of work, by cooling the plastic into a certain shape, after opening the mold again. Such as plastic cups, plastic basins, plastic shells of various complicated situations and so on. He has a limited amount of injection per cycle.Extruder is through the plastic particles after the warm, through the mold continuous extrusion, such as plastic pipes, plastic plates, plastic bars and so on. It can be extruded into very long products without the limitation of cycle time.
Extrusion die is very simple, that is, die sets of core mold, similar to the two ring together, extrusion tube shape, and then through the sink cooling hardened. Injection molding and extrusion, the biggest differences are as follows: 1, injection molding can be more complex products, products are discontinuous, one cavity, such as mobile phone shell, etc.. The characteristics, not continuous production, cooling the first mock exam to play the first mock exam. And head. 2, extrusion can only be done in the same cross-section, continuous production of products, such as pipes,. Features can be continuous production, through the sink, edge extrusion edge cooling. As long as the material, always can be squeezed out, tens of thousands of meters can not head.
