KTS high-performance series engineering plastic extrusion production line: technical analysis and application practice

1. Basic principles and system composition of extrusion production line

The engineering plastic extrusion production line is a continuous production system designed based on the plastic flow characteristics of polymer materials under specific temperature and pressure conditions. Its core working principle is to melt and plasticize solid plastic particles through the shear force generated by the rotation of the screw and the heating of the barrel, and then give the melt a specific shape through the mold, and finally cool and shape it into the required product. The entire production line usually consists of two major parts: the main machine (extruder) and the auxiliary machine (molding and post-processing equipment), forming a complete processing chain.

The main system of the extrusion production line mainly includes three functional modules: extrusion system, transmission system and heating and cooling system. The extrusion system consists of a screw and a barrel, which is the core place for plasticization of plastics. According to the different characteristics of engineering plastics (such as melt index and thermal stability), the screw design has significant differences. The transmission system provides the power required for the rotation of the screw. Modern production lines mostly use variable frequency speed control motors to achieve precise control of the speed. The heating and cooling system maintains the precise temperature of each temperature zone through the cooperation of electric heating coils and circulating water circuits, which is particularly important for the processing of engineering plastics, because temperature fluctuations will directly lead to variations in product size and performance.

The configuration of the auxiliary system depends on the product type, usually including:

Molding equipment: mold (die head) and shaping device, which determine the cross-sectional shape and dimensional accuracy of the product

Cooling system: water tank or vacuum shaping box, so that the melt can be quickly solidified and shaped

Traction equipment: crawler or roller traction machine, providing stable tensile force

Cutting equipment: flying saw or planetary cutter, cutting the continuous product to a fixed length

Stacking or winding device: complete the collection of the final product

2. Technical positioning and market position of KTS high-performance series

KTS high-performance series twin-screw extruder represents the advanced level of current engineering plastic extrusion technology, and is designed to meet the stringent requirements of high-end customers for product quality, production efficiency and equipment reliability.

In the field of engineering plastics processing, the KTS series is suitable for the extrusion molding of high-performance polymers, including but not limited to PEEK (polyetheretherketone), PPS (polyphenylene sulfide), PA (polyamide) and other special engineering plastics. These materials usually have the characteristics of high melting point, high viscosity and high corrosiveness, which puts extremely high demands on processing equipment. Through innovative mechanical design and intelligent control system, the KTS series has successfully solved key technical problems such as material plasticization uniformity, thermal stability and equipment durability under high temperature and high pressure environment.

Compared with traditional extrusion equipment, the KTS high-performance series has three core competitive advantages:

• Precision control capability:equipped with high-precision temperature control system and pressure sensor, the temperature control accuracy can reach ±1℃, and the pressure fluctuation range is small, ensuring that the material is processed under the best process window

• Efficient production capacity: Optimized screw combination and mixing elements increase production capacity, reduce energy consumption, and achieve green and efficient production

• Material adaptability: Modular design supports rapid replacement of screw elements and barrel bushings, and can flexibly adapt to a wide range of processing needs from general engineering plastics to special engineering plastics

3. Typical application scenarios

In the field of medical health, the KTS pharmaceutical hot melt extrusion series performs particularly well. This special model meets the requirements, with a full stainless steel design and a surface roughness of Ra≤0.4μm, eliminating the risk of contamination. The equipment adopts a specially designed screw configuration and temperature control system, which can achieve uniform mixing of thermosensitive drugs and polymer carriers at low temperatures, avoiding thermal degradation of active drug ingredients.

The electrical and electronic industry has extremely high requirements for the insulation, heat resistance and dimensional stability of engineering plastics. The reinforced PPS, LCP and other materials produced by the KTS series are widely used in precision electronic components such as connectors, relays and micro motors.

In the field of transportation, the KTS series provides material support for lightweight automobiles. By processing composite materials such as long glass fiber reinforced PA and carbon fiber reinforced PEEK, the product specific strength reaches 2-3 times that of aluminum alloy, and the weight is reduced by 30%-40%.