A manufacturer specializing in plastic products

Production process and manufacturing method of plastic hollow board box

by:Qusheng     2021-06-08

Hollow panels are available in blue, red, black, translucent, yellow, green, red, gray, coffee and other colors, and can also be made according to user needs.

The hollow board has gorgeous appearance, rich colors, authentic features, non-toxic, odorless, moisture-proof, corrosion-resistant, and light weight. Anti-aging and anti-bending. High load-bearing strength, tension, compression, tearing, high temperature, etc. It is widely used in various industries such as electronics, machinery, light industry, postal service, food, medicine, pesticides, home appliances, advertising, decoration, stationery, optical and magnetic technology, bioengineering, medicine and health.

Five steps in the production process of plastic hollow board

   Extrude the core material and the flat plate at the same time on a single extruder, and the flow channel of the die will melt The body is divided into 3 layers, the upper and lower layers are formed into flat plates, and the middle layer is formed into the core layer of the plastic hollow plate. In order to maintain the shape of the core layer and the surface layer, the cooling setting machine is used to shape it, and the first tractor will pull it to the heating box. Multi-processes such as secondary heating and secondary cooling afterwards.

  1. Use an automatic cutting machine to cut the hollow sheet.

  2, make die-cutting templates according to drawings.

  3. Use open-close die-cutting machine, desktop die-cutting machine for precise cutting.

  4. Screen printing of semi-finished products that have been die-cut.

  5. Various binding and welding technologies are used to make various hollow board products.

Cycle procedures and precautions for the injection molding production process of plastic hollow plates

Close the mold, high pressure and low speed mold clamping, move the injection seat forward, inject the molten material, hold the pressure, and melt in the mold. Material cooling (the plasticizing screw retreats with the injection seat and the screw rotates to plasticize the raw material during this process)-the in-mold molding melt is cooled and solidified, the mold is opened (the product is ejected at the same time), and the mold is closed (the next injection product cycle) (Start of production),

The raw materials for plastic hollow boards are added to the barrel of the injection molding machine from the hopper according to the amount of plastic products used at a time, and the rotating screw drives the raw materials forward, and at the same time the raw materials are received The heating outside the barrel. Because the raw material in the barrel is heated and heated, it is also compressed due to the gradual reduction of the volume of the screw on the screw. In addition, the continuous rotation of the screw thread causes the material to move forward and the material and the barrel. A variety of conditions such as friction between the raw materials are gradually plasticized into a molten state while being pushed forward. The melt to the front of the screw, due to the resistance of the nozzle, produces a reverse screw thread pressure, and as the screw is pushed to melt As the amount of material advancement increases, the resulting melt reverse thrust pressure also gradually increases. When the reverse thrust pressure is greater than the thrust and frictional resistance of the cylinder piston to the screw (this resistance is the back pressure of the screw), the screw begins to retreat , At the same time, start the feeding and metering of the hopper.

The distance of the screw retreat is determined by the injection volume of the injection molded product at a time, and is controlled by the stroke limit switch adjusted before production. The retreating screw touches the stroke. After the switch is turned on, it stops rotating and retreats to complete a pre-plasticized raw material process.

After the pressure holding, cooling and shaping have reached the preset time, the solid molding of the product is completed. The injection seat is pulled by the cylinder piston to retreat , The second pre-plasticization of the screw begins, the molding mold is opened, the product is ejected from the mold cavity, and the entire injection molding process of the plastic hollow plate is completed.

After the clamping part is completed, the injection seat is The piston of the oil cylinder pushes forward until the nozzle is close to the bushing mouth; then the piston of the injection cylinder pushes the screw to move forward quickly, and the melt is injected into the cavity of the forming mold according to the pressure and flow speed required for the melt to enter the forming mold. To prevent the molten material from filling the molding mold cavity from returning and replenish the amount of melt shrinkage before the melt is cooled and solidified in time, the nozzle that completes the injection is still close to the bushing mouth and maintains a certain pressure. This process is called protection Pressure, cooling and shaping.

In the future, the world packaging industry will definitely develop in the direction of 'light, thin, short and small'. If the concept of environmental protection can be taken into account, it will be recognized by all countries, and it will be a great tool for enhancing competitiveness.

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