Network-free network changer

Product Name: Meshless Screen Changer

I. Core Functions and Working Principle

Core Functions:

1. Absolutely Continuous Dynamic Filtration: The filter mesh belt is drivento move continuously and slowly(speed adjustable). Fresh and clean filtration areas continuously enter the main filtration zone, while the areas clogged with impurities are continuously removed. The melt pressure, flow rate, and temperatureachieve zero disturbance.

2. High - efficiency Fine Filtration: Adopthigh - precision porous sintered metal (powder metallurgy) mesh beltorspecial woven steel mesh belt. The filtration accuracy is high and uniform, and it can stably filter fine gels, carbides, unmelted materials, etc.

3. Automatic Impurity Discharge and Self - cleaning: For the dirty part of the mesh belt that has been removed from the main filtration zone, the impurity filter cake attached to it is automatically removed by a scraper or a high - pressure back - blowing device and collected in the waste box. The process is fully automatic and requires no manual intervention.

4. Extra - long Operating Cycle: Theoretically, as long as the mesh belt does not break, continuous filtration can be achieved indefinitely. It is especially suitable formaterials with high impurity content (such as highly contaminated recycled materials) or for production lines that requirecontinuous operation for weeks or even months.

Working Principle (Dynamic Continuous Filtration):
The special filter mesh belt is pulled by two sets of precise driving/tensioning rollers and moves unidirectionally at a very slow speed (such as a few millimeters to a few centimeters per minute) at a constant speed.

• Filtration Zone: The melt enters the screen changer from the extruder and is forced to pass throughthe moving and clean mesh belt areaunder high pressure. Impurities are intercepted on the surface of the mesh belt to form a filter cake, and the pure melt flows to the mold.

• Removal and Cleaning Zone: The part of the mesh belt carrying impurities slowly moves out of the high - pressure filtration zone and passes throughan automatic scraper or a high - temperature and high - pressure gas/melt back - blowing deviceto peel off the solidified impurity filter cake, which falls into the waste collector below.

• Continuous Supply: The cleaned mesh belt (or the consumed mesh belt) continues to move, continuously providing a new clean filtration surface for the filtration zone. At the same time, the used mesh belt is wound up for collection or recycled (depending on the design).

II. Main Structural Components

• Heavy - duty Pressure - resistant Body: Made of high - strength alloy steel, with precisemesh belt guides and sealing surfacesdesigned to ensure stable operation of the mesh belt and zero leakage of the melt under high temperature and high pressure.

• Core Filtration and Transmission System:

  • Special Filter Mesh Belt: Core Consumable. Mostlymulti - layer sintered stainless - steel powder metallurgy beltorspecial fine - woven steel belt, which has high porosity, high strength, high dirt - holding capacity, and excellent anti - creep performance.

  • Precise Driving/Tensioning Roller System: Driven by a stepper motor, equipped with a high - precision reducer and a tension control system to ensure a constant moving speed and stable tension of the mesh belt.

• Automatic Cleaning System:

  • Scraper Device: A hard - alloy scraper is used, closely attached to the back of the mesh belt to scrape off the removed impurity filter cake.

• Waste Collection and Discharge System: A sealed waste collection tank can automatically discharge solid waste residue regularly or continuously.

• Intelligent Temperature Control and Sealing System:

  • Multi - zone Independent Temperature Control: Precise temperature control is carried out for the body, mesh belt, cleaning zone, etc. in different zones.

  • Special End - face Sealing: Advanced sealing technologies such asflexible graphite, spring - energized seals, or magnetic fluidsare used on both side edges of the mesh belt to prevent the melt from leaking from the edges of the mesh belt.

III. Core Features and Advantages of the Product

• Production Stability: Completely EliminateTo ensure the absolute stability of extrusion output and product quality (such as rod uniformity and color) despite the pressure peaks and valleys and temperature fluctuations caused by screen changing, it is a powerful tool for producing high - end products.Absolute stability, it is a powerful tool for producing high - end products.

• Fully automatic operation: The entire process from filtration, screen shifting, slag cleaning to waste disposal is automatically completed, greatly reducing labor costs and operational risks.

• Continuous operation capability: Particularly suitable for7x24 - hour non - stop production working conditions. There is no need to plan shutdowns for screen changing, and the equipment utilization rate reaches the theoretical maximum.

• Excellent impurity handling ability: A large effective filtration area and a dynamic update mechanism enable it to handle materials with extremely high impurity content.

• Environmental protection and safety: The waste slag is automatically collected in a closed container, keeping the working environment clean; there is no risk of high - temperature melt spraying.

• Technical parameters (example):

  • Model: BCF - 250 (suitable for screw diameter)

  • Design pressure/temperature: 35 - 50 MPa / ≤350°C

  • Screen belt type: Stainless steel sintered powder metallurgy belt

  • Filtration accuracy: 40 - 120 microns (equivalent to about 150 - 400 mesh)

  • Screen belt width/effective filtration width: For example, 150mm / 120mm

  • Screen belt moving speed: 0.1 - 10 mm/min (infinitely adjustable)

  • Driving method: Servo motor drive