A 2 head reciprocating screw blow molding machine is a type of equipment used in the manufacturing process of blow molding. Blow molding is a manufacturing technique used to create hollow plastic parts, such as bottles, containers, and other similar products.

The machine consists of two reciprocating screws that are responsible for melting and extruding the plastic material. The reciprocating motion of the screws allows for the precise control of the plastic flow and ensures uniform distribution of the molten plastic within the mold.

Here’s a step-by-step overview of the process using a 2 head reciprocating screw blow molding machine:

1. Plastic material, usually in the form of small pellets or granules, is fed into the machine’s hopper.
2. The reciprocating screws rotate and transport the plastic material towards the heating zone.
3. In the heating zone, the plastic pellets are melted under controlled temperatures and pressures.
4. Once the plastic material reaches the molten state, it is forced through the reciprocating screws’ channels.
5. The molten plastic is then injected into a split mold that consists of two halves.
6. The mold closes, and pressurized air is introduced into the hollow cavity of the mold.
7. The air expands the molten plastic to conform to the shape of the mold.
8. The plastic is cooled down, either through the use of cooling fans or water channels within the mold.
9. Once the plastic has solidified and cooled, the mold opens, and the finished product is ejected.

The use of a 2 head configuration allows for the production of two identical parts simultaneously, increasing productivity and efficiency. It is commonly used in industries that require high-volume production of blow-molded plastic products.