Universal Extruder

Description

The Universal Extruder is the heart of our hollowcore production system. Its unique design ensures that production is low cost, extremely reliable and the finished hollowcore is of the highest quality. The functional design means it very easy to use, set-up and maintain.

The Extruder is unique as it works with auger drive combined with a 9000rpm high frequency vibration system. It produces hollowcore slabs with early strengths; consistent high quality finishes; low cement content; high load bearing capacities; excellent strand bond and low camber.

The Extruder requires one man to run the machine on the production bed and once it has been set-up correctly it simply requires the mix to be put in the hopper to begin production.

The extruder can manufacture the full range of hollowcore slab depths from 150mm (6”) to 400mm (16”). The unique quick change power unit takes just 5 minutes to swap from one cassette depth to another. The extruder makes hollowcore slabs suitable for both floor and wall panel applications.

The machine comes with an independent wire/strand guide trolley to ensure correct positioning of prestress wires/strands and reduces resistance to movement ultimately improving finished product quality and increasing the working life of wearing components in the compaction chamber.

The same effort that feeds the concrete mix through the machine and forms it into the final precast slab also provides the motivation to drive the extruder along the bed. This natural process propels the extruder along the casting bed and allows the compacted concrete to reach the required density.

The Spiroll system uses an extremely dry concrete mix and less cement than other machines (typically a water/cement ratio of approximately 0.3). Due to the intense high frequency vibrations and pressure within the machine the concrete mix is 'plasticised' during the short time that it is passed through the extruder which allows it to be moulded and formed into the required section.

The formed slab then reverts to its 'dry' state and reaches such a high density that it is possible to stand on the slab immediately after the extrusion process. After a period of natural or accelerated curing, the slabs are then cut to length, stripped from the casting bed and transported to the storage area.

The casting beds are then cleaned, a release agent is applied and high tensile steel strands are located in position for the automatic extrusion process to begin again. Normally the entire production takes place over a 24-hour cycle.

Benefits

• High frequency vibration - quality slab; excellent compaction; early strength with good strand bond
• Simplicity - very easy to set-up, use and maintain
• 5 minute change over for all slab depths
• Fast curing time (7/8 hours with heating system allowing double casting in 24hrs
• Low cement content – 320kgs per m3
• Compact machine - optimum production bed utilisation and less raw material wastage

Features

• Quick change power unit
• Any depth of slab from 150mm through to 400mm
• High frequency vibration
• Noise reduction system
• Hydraulic cable reeler

Specifications

Download

Download the Universal Extruder Specification Flyer