What is the plastic extruder? – Suzhou Polytime Machinery Co., Ltd.

Plastic has gradually become an important material for the rapid development of modern industrial technology in China because of its strong chemical corrosion resistance, low production cost, good waterproof performance, lightweight, and good insulation performance. At present, extrusion molding technology is one of the main plastic production methods, which is suitable for large-scale mass plastic processing and production. Compared with traditional metal material processing and molding, it is simpler to realize the automation of the extrusion molding process. Therefore, plastic extruder machine has become the main equipment of plastic extrusion production.

Here is the content list:

What is the structure of the plastic extruder?

What is the working principle of plastic extruder?

What is the production process of plastic profile forming?

What is the structure of the plastic extruder?
The extruder is the main machine of plastic extruder, which is composed of an extrusion system, transmission system, and heating and cooling system.

The extrusion system includes a screw, cylinder, hopper, head, and die. The screw is the most important part of the extruder, which is directly related to the application scope and productivity of the extruder. It is made of high-strength corrosion-resistant alloy steel. The cylinder is a metal cylinder, which is generally made of alloy steel with heat resistance, wear resistance, corrosion resistance, and high compressive strength of composite steel pipe lined with alloy steel. The bottom of the hopper is equipped with a cutting device, and the side is equipped with an observation hole and a metering device. The machine head is composed of an alloy steel inner sleeve and carbon steel outer sleeve, and a forming die is installed inside.

The transmission system is usually composed of a motor, reducer, and bearing. The heating and cooling function of the heating and cooling device is a necessary condition for the normal plastic extrusion process. The heating device makes the plastic in the cylinder reach the temperature required for process operation, and the cooling device ensures that the plastic is within the temperature range required by the process.

What is the working principle of plastic extruder?
The plastic extrusion production line is mainly composed of the main machine and auxiliary machine. The main function of the host machine is to process the raw materials into a melt with plasticity and easy to process and shape. The main function of the extruder is to cool the melt and extrude the finished product. The working principle of the extruder host is that the raw materials are quantitatively added into the barrel by the feeding bucket, the main motor drives the screw to rotate through the reducer, and the raw materials are heated and plasticized into uniform melt under the dual action of heater and screw friction and shear heat. It enters the machine head through the perforated plate and filter screen and discharges water vapor and other gases through a vacuum pump. After the die is finalized, it is cooled by the vacuum sizing and cooling device and moves forward stably and uniformly under the traction of the traction roller. Finally, it is cut and stacked by the cutting device according to the required length.

What is the production process of plastic profile forming?
The extrusion process of plastic profile can be roughly described as adding granular or powdery solid materials into the hopper, the barrel heater starts heating, the heat is transferred to the materials in the barrel through the barrel wall, and the extruder screw rotates to transport the materials forward. The material is rubbed and sheared with the barrel, screw, material, and material so that the material is continuously melted and plasticized, and the molten material is continuously and stably transported to the head with a certain shape. After entering the vacuum cooling and sizing device through the head, the melted material is solidified while maintaining the predetermined shape. Under the action of the traction device, the products are continuously extruded, cut, and stacked according to a certain length.

The plastic extruder is used in the plastic configuration, filling, and extrusion process because of its advantages of low energy consumption and manufacturing cost. No matter now or in the future, plastic extrusion molding machinery is one of the widely used machines in the plastics processing industry. Suzhou Polytime Machinery Co., Ltd. is a high-tech enterprise that specializes in R&D, production, sales, and service in plastic extruder, pelletizer, granulator, plastic washing recycling machine, pipe production line. If you are engaged in plastic pellet extruder or plastic profile manufacturing, you can consider our high-quality products.