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Production process for spiral hoses
Spiral hoses are manufactured in a wide variety of ways, and we have many years of experience in processing and using different manufacturing technologies. Whether extrusion or clip: Find out all about our hose manufacturing processes.
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In extrusion (from Latin: extrudere = to push out, drive out), plastics or other viscous, hardenable materials are pressed through a die in a continuous process. The plastic, the extrudate, is first melted and homogenised in an extruder (also known as a screw press) by means of heating and internal friction. Furthermore, the pressure required for the flow through the die is built up in the extruder. The process is very similar to injection moulding up to this point, but differs mainly in that extrusion is a continuous process. When extruding a plastic profile, a spring steel wire is moulded into the profile so that it cannot twist or move. The hose is then helically and overlappingly welded to give it its final shape.
Masterflex is an important system partner in the field of profile-extruded PU spiral hoses for the mechanical engineering industry.
The processing of prefabricated film or plastic fabric offers us a wide range of options for responding flexibly to our customers' requirements. A specific clamping profile ("clip") is required so that a hose can be manufactured from individual film or fabric strips. It is supplied as a steel strip and is converted into a profile using special moulding tools. The fabric strips are inserted into this clamping profile - while the clipping machine moves the profile in a helical motion and simultaneously "squeezes" the clamping profile shut. With this special clamping process, the tubular profile is mechanically connected to the external metal spiral with extreme tensile strength.
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In addition to clip production, Masterflex has additional options for manufacturing hoses from pre-produced film or plastic fabric. Strips of film or fabric are wound up in a helical shape and welded overlapping. In this production step, additional support spirals made of spring steel wire or plastic can be embedded in the hose cover or welded on from the outside.
In the Coating production area, we concentrate our expertise in the processing of cast elastomers. We utilise the ability to cast plastics in specially designed special moulds, for example, in the production of special connection parts or in the processing of sleeves. Such specific solutions, in which individual hoses are precisely and reliably connected to other functional parts, are aimed at customers who are looking for suitable hose accessories.
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Vulcanisation
Vulcanisation is a chemical-technical process that was developed by Charles Goodyear in 1839. With the help of this process, plastic is made resistant to atmospheric and chemical influences as well as mechanical stress under the influence of time, temperature and pressure. After using this process, the processed material has permanently elastic properties and returns to its original shape when subjected to mechanical stress. It also has greater tear resistance, elasticity and resistance to ageing and weathering.
Customised design
Our answer to the specific requirements of technical hoses are customised hose designs.
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