Whether it is an injection molding machine or an extruder, plastic is plasticized and processed into a certain shape. Although, they have similar functions, differences between them still exist.
Structurally, both the screw and barrel use machines to plasticize and convey plastic. However, for extruders, the screw has a larger diameter.
Programmatically speaking, the extruder can continuously extrude the product formed by the plastic through the die. For example: plastic pipes, plates, profiles and rods. However, the injection molding machine cannot work continuously. The plastic will be injected into the closed mold cavity. When the cavity is filled, the machine will stop working and the plastic mold will be cooled and shaped. This machine will work after the plastic mold is removed from the mold. The injection molding machine products produced have relatively complex structures, such as plastic cups and pot shells.
These two machines can handle most plastics. The difference in the materials used is that the extruder can have a higher viscosity. The reason for the injection molding machine is that the plastic flows inside the mold, and the flow channels inside the mold are usually curved and narrow.
When two machines are started, the current will be 3 to 4 times or a maximum of 6 to 7 times. When the machines are working normally, the current will tend to be stable.
Here are the general differences and similarities between extruders and injection molding machines.
