PP hollow board is rich in color, non-toxic, odorless, moisture-proof, corrosion-resistant, anti-aging, and has the characteristics of folding resistance. Widely used in electronics, machinery, light industry, postal and other industries. So how is the production process of pp hollow board produced?

The PP hollow board is added to the barrel of the injection molding machine in a certain proportion before the start of production, and the rotating screw pushes the raw material forward, and at the same time, the external heating of the raw material receiving tube causes the raw material to be pushed forward. At the same time, it is gradually plasticized into a molten state.

The melt to the front end of the screw generates a reverse screw thread pushing pressure due to the resistance of the nozzle. As the screw pushes the melt forward amount, the melt reverse pressure is gradually increased. When this reverse pressure is applied, When the thrust and frictional resistance of the cylinder piston to the screw are greater, the screw starts to retreat and at the same time starts the feeding measurement of the hopper. The distance that the screw retreats is determined by the amount of shots injected into the molded product.

Controlled by the travel limit switch adjusted before production. After the retracting screw hits the stroke switch, it stops rotating and retreating, completing a pre-plasticizing material program. The injection seat is pulled back by the cylinder piston, and the second pre-plasticization of the screw is started. The molding die is opened, and the product is pushed out of the cavity to complete the whole process of injection molding of the PP hollow plate.

The pp hollow board uses an automatic cutting machine to cut the hollow sheet. Die-cut templates are made according to the drawings. Use the opening and closing die-cutting machine and the desktop die-cutting machine for precise cutting. The die-cut semi-finished product is screen printed. Various hollow board products are made by various binding and welding techniques. The above is an introduction to the analysis of the production process of pp hollow board for everyone, I hope to provide a reference for everyone to understand the hollow board.