Bidirectional stretch mesh production line equipment is an efficient automated device used for producing biaxial stretch mesh, widely used in packaging, construction, agriculture, filtration and other fields. Bidirectional stretch mesh has the characteristics of high strength, lightweight, and good breathability, and its production process involves multiple key technologies.

1. Equipment structure

The production line equipment for biaxially stretched mesh mainly consists of the following parts:

Extrusion system: used to melt and extrude raw materials (such as polypropylene, polyethylene, etc.) to form sheets.

Cooling system: Quickly cool the extruded sheet to shape it.

Preheating system: Preheat the sheet before stretching to reach the appropriate stretching temperature.

Longitudinal stretching system: Stretching the sheet longitudinally to improve its longitudinal strength.

Lateral stretching system: Stretching the sheet horizontally to improve its lateral strength.

Heat setting system: Heat setting the stretched sheet to stabilize its size and performance.

Roll up system: Roll the finished biaxially stretched mesh into a roll for subsequent processing or transportation.

2. Process flow

The production process of biaxially stretched mesh mainly includes the following steps:

Raw material preparation: Select suitable raw materials and perform drying treatment to ensure the purity and dryness of the raw materials.

Extrusion molding: Melting and extruding raw materials through an extruder to form a uniform sheet.

Cooling and shaping: The sheet is rapidly cooled by a cooling roller to preliminarily shape it.

Preheating treatment: Preheat the sheet before stretching to reach the appropriate stretching temperature.

Longitudinal stretching: The sheet is stretched longitudinally by a longitudinal stretching device to improve its longitudinal strength.

Lateral stretching: By using a lateral stretching device to stretch the sheet horizontally, its lateral strength is improved.

Heat setting treatment: Heat setting the stretched sheet to stabilize its size and properties.

Roll up packaging: Roll the finished biaxially stretched mesh into a roll and package it for future use.

3. Key technologies

The key technologies of the biaxially stretched mesh production line equipment mainly include the following aspects:

3.1 Extrusion Technology

Extrusion technology is the foundation of biaxially oriented mesh production, and its key lies in the design and control of the extruder. The extruder needs to have efficient and stable extrusion capacity to ensure the uniformity and consistency of the sheet. During the extrusion process, temperature control, pressure control, and extrusion speed control are key and require precise adjustment to ensure the quality of the sheet.

3.2 Cooling Technology

Cooling technology directly affects the shaping effect of the sheet. The cooling system usually adopts a multi roll cooling device, which ensures rapid cooling and shaping of the sheet by adjusting the temperature and speed of the cooling rolls. During the cooling process, it is necessary to avoid deformation and stress concentration of the sheet material to ensure smooth subsequent stretching.

3.3 Preheating Technology

Preheating technology is an important step before stretching, with the aim of achieving a suitable stretching temperature for the sheet. Preheating systems usually use hot air circulation or infrared heating methods to ensure uniform heating of the sheet by precisely controlling the preheating temperature and time. During the preheating process, it is necessary to avoid local overheating or undercooling of the sheet to ensure uniform stretching.

3.4 Longitudinal stretching technology

Longitudinal stretching technology is the key to improving the longitudinal strength of sheet materials. The longitudinal stretching device usually adopts a multi roll stretching method, which stretches the sheet longitudinally by adjusting the speed and tension of the stretching rollers. During the stretching process, it is necessary to precisely control the stretching ratio and speed to ensure the longitudinal strength and uniformity of the sheet.

3.5 Lateral Stretching Technology

Lateral stretching technology is the key to improving the lateral strength of sheet materials. The transverse stretching device usually uses a clamp stretching method to stretch the sheet horizontally by adjusting the spacing and stretching speed of the clamps. During the stretching process, it is necessary to precisely control the stretching ratio and speed to ensure the transverse strength and uniformity of the sheet.

3.6 Heat setting technology

Heat setting technology is the key to stabilizing sheet size and performance. Heat setting systems typically use hot air circulation or infrared heating methods to ensure the dimensional and performance stability of the sheet by precisely controlling the heat setting temperature and time. During the heat setting process, it is necessary to avoid deformation and stress concentration of the sheet material to ensure the quality of the finished product.

3.7 Rolling Technology

The winding technology is the key to ensuring that the finished biaxially stretched mesh is wound neatly and easy for subsequent processing. The winding system usually uses an automatic tension control device to ensure that the finished product is wound neatly and without wrinkles by adjusting the winding speed and tension. During the winding process, it is necessary to avoid stretching and deformation of the finished product to ensure its quality.

The production line equipment for biaxially stretched mesh involves multiple key technologies, including extrusion technology, cooling technology, preheating technology, longitudinal stretching technology, transverse stretching technology, heat setting technology, and winding technology. The comprehensive application of these technologies ensures the high-quality and high-efficiency production of biaxially stretched mesh. With the continuous advancement of technology, the production line equipment for biaxially stretched mesh will develop towards higher automation, higher precision, and higher efficiency, providing better quality stretched mesh products for various industries.