process of injection machine

Screw on the injection machine rotated in the direction opposite from the direction ulirnya by the motor through a transmission. Due to rotation of the screw, plastic raw material with granules that are in the form hoper coming down, entered into between the space between the screw and barrel, then pushed forward (left) by the fins of the screw thread profile.

On the outside wall of the barrel fitted with a heater temperature setting more and left up to the higher temperatures at the end of the barrel reached the level of melting plastic.

Thus the conduction room screw tip and the tip or nozzle barrel filled with molten plastic. Because there is an additional volume of plastic that fills this room is a plastic that is pulled forward by the screw rotation. Screw pushed rearward until the screw rotation is stopped. TSB screw base connected to a piston in the hydraulic cylinder.

If the hydraulic oil with a certain pressure flowed into the cylinder, the piston will move push screw, so that the plastic melting in the room between the end of the screw and barrel or nozzle tip will be pushed (ter-injected) into the cavity of the mold cavity after passing through the nozzle holes and sprue. After the cavity cavity filled with plastic-injection at a pressure oil pushing the piston and screw retained for a while and then the oil pressure is stopped. Screw being played back in the direction opposite of the entry process hoper or too raw plastic materials from hoper or also the process of filling the room between the end of the screw - barrel tip - nozzle, with the plastic melting. This movement is called a step plasticitizing.

After a cavity filled cavity in the plastic injection-out until the plasticizing step, a process of cooling. Long process of cooling required to freeze the plastic melting on the injection-out until strong enough removed from the mold called pendinganan time (cooling time) will be discussed later. Once the product is strong enough utuk issued, then the plate is moving (moving plate) of the machine moves backward, the mold plates will open some of which involved plate stationary (fixed plate) and some joined the moving plate. On starting to open, grabbed the male products of the mold, which is long enough after the opening step, stripper plate of the male pushing the product off and fall out. Moving plate and then move forward, mold re-injection close to lawyer's next.

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