Rubber strip production line

Model XJ-75 XJ-90 XJ-120 XJ-150 Screw Diameter (mm) 75 90 120 150 Length-to-Diameter Ratio 20:1 20:1 20:1 20:1 Motor Power (kW) 30 55 110 132 Screw Speed (r/min) 30–65 30–60 30–50 30–50 Production Rate (kg/h) 80–180 100–300 180–540 500–750 Working Principle Extrusion molding is a manufacturing process in which a plasticized rubber compound, under specific conditions, is continuously forced through an extrusion die to produce a product with a defined cross-sectional shape. As the rubber compound moves forward along the screw, mechanical and thermal effects cause changes in its viscosity and plasticity, transforming it into a viscous fluid. Based on these changes during extrusion, the working section of the screw is generally divided into three main parts according to their functions: the feeding section, the compression section, and the extrusion section. The characteristics of each section are as follows: 1. Feeding Section: Also known as the solid conveying section, this segment extends from the feed port until the rubber compound begins to melt. After entering the feed port, the compound undergoes relative motion between the screw grooves and the inner wall of the barrel under the pushing action of the rotating screw, forming compacted rubber lumps. 2. Compression Section: Also called the plasticizing section, this part spans from the onset of melting until all the rubber compound becomes fully flowable. The compression section receives the rubber lumps delivered from the feeding section, compacts them, further softens them, and expels any entrapped air back toward the feeding section. 3. Extrusion Section: Known as the metering section, this stage further pressurizes and mixes the material conveyed from the compression section. At this point, the rubber compound within the screw grooves has reached a fully fluid state. The rotation of the screw drives the material forward, ensuring uniform extrusion through the die channel at a consistent rate and pressure.

Key words:

Classification:

Product Showcase

Business Hotline:

400-0319-386

Related products

Feedback

Rubber strip production line

Model number	XJ-75	XJ-90	XJ-120	XJ-150
Screw diameter mm	75	90	120	150
Length-to-diameter ratio	20:1	20:1	20:1	20:1
Motor power (kW)	30	55	110	132
Screw rotation speed r/min	30-65	30-60	30-50	30-50
Production rate kg/h	80-180	100-300	180-540	500-750

Working principle

Extrusion molding is a manufacturing process in which a plasticized compound, under specific conditions, is continuously forced through a die to produce a product with a defined cross-sectional shape.

As the rubber compound advances along the screw, mechanical and thermal effects cause changes in its viscosity and plasticity, transforming it into a viscous fluid. Based on these changes during extrusion, the working section of the screw is generally divided, according to its function, into the feeding zone, the compression zone…

It consists of three parts: the retraction segment and the extrusion segment.

The characteristics of each stage are as follows:

1. Feeding Section: Also known as the solid‑conveying section, this segment extends from the feed port to the onset of rubber melt. After the rubber compound enters the feed hopper, it undergoes relative motion between the screw grooves and the inner wall of the barrel under the pushing action of the rotating screw, forming compact rubber agglomerates of a certain size.

2. Compression Section: Also known as the plasticization section, this segment extends from the onset of rubber compound melting to the point when the entire compound has become flowable. In this section, the compressed rubber lumps delivered from the feeding section are compacted and further softened, while entrapped air is expelled back toward the feeding section.

3. The metering section, also known as the compression section, further pressurizes and mixes the rubber compound conveyed from the compression section. At this stage, the rubber has already attained a fully developed flow state within the screw channels. The rotation of the screw drives the material forward, and it is extruded uniformly through the die channel at a specified rate and pressure.