A Concise Overview of 2 Major Feeding Technologies for Cable Extrusion

Posted by Ranjeet kumar on March 16th, 2021

Be it HFFR cable extrusion or LSZH cable extrusion, there are two essential feeding techniques: flood feeding and starve feeding. When it comes to flood feeding, the feed container is filled to a specific level, the material streams to the extruder most of the time in mass flow, and the extruder takes in as much material as it can gnaw off. The screw channel in general is filled immediately. Subsequently, in flood feeding, the length of the screw is pretty much equivalent to the flighted length of the screw.

A feeding device is used in starve feeding

 When it comes to starve feeding, the polymer is metered into the extruder making use of a feeding device. There is no amassing in the container; the material rather drops straightforwardly into the screw channel, and the screw channel is mostly full at the feed opening. As the material is passed on to the screw channel, it turns out to be filled downstream of the feed.

Major differences between starve feeding and flood feeding

 Subsequently, in starve feeding the effective length of the screw is not exactly the flighted length of the screw. A significant preferred position is that the successful screw length can be changed while the extruder is running. This permits more extensive process control than flood feeding where the viable length isn't customizable. Starve feeding is just useful if the extruder is adequately long to accomplish total softening and viable blending.

Along these lines, starve feeding by and large won't give measure enhancements for short (25D long) extruders. Starve feeding requires a feeder, yet it lessens engine load, melt temperature, and odds of agglomeration, connecting, and isolation in the container. Be it HFFR cable extrusion or LSZH cable extrusion, the choice of both feeding methodologies depend upon application to application and project to project.

Starve feeding scores heavily over flood feeding 

 Starve feeding permits a degree of process benefit that is unimaginable with flood feeding. It is where the divider thickness variety is estimated at a few fill levels. 100% fill addresses flood feeding; while values less than that demonstrate starve feeding. The percent fill is the real feed rate comparative with the flood-feed rate. The ideal cycle conditions for limiting divider thickness variety are around 98% fill. Divider thickness variety at the ideal level of starvation is about a large portion of that at flood feeding.

 This implies that at ideal conditions, less material can be utilized because the HFFR cable extrusion or LSZH cable extrusion line can be made with a divider thickness nearer to the base worth.

Concluding Remarks 

 Established in the year 1974, Supermac Industries (India) Limited is India’s leading manufacturer and supplier of HFFR cable extrusion and LSZH cable extrusion lines. Today, the company meets the specific needs of diverse industries in the cable sector such as power, optical fiber, house wiring control cables, and medical lines. Supermac boasts of a diversified product portfolio that includes a comprehensive range of extrusion machines, crossheads, caterpillars, capstans, screws & barrels, take-ups, and pay-offs.