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  • info@krafton.de
  • 1
    Step 1
    The process starts with the input of the fiber reinforcements. In front are the glass shelves where the fiber optic cables are placed on reels. Every reel has approximately 2,1 kilometer of fiber optic string from for instance 9600 TEX.
  • 2
    Step 2
    At the impregnation bin, the fiber optic wires and possibly the mats are provided with polyester resin. The liquid polyester resin is mixed with hardener, dye, flame retardants and other additives.
  • 3
    Step 3
    The input plates guide the fiber optic wires and mats to the correct position in the mold and ensure a proper glassware. The fiber optic strands ensure a good length gain and the mats provide cross reinforcement. The asset depends on the properties that are requested from the profile.
  • 4
    Step 4
    The resin, fibers and mats are then pulled through a heated mold. The heated mold forms and cures the profile. Halfway through the mold the material will cure, and once out of the mold the profile is completely cured and can be mechanically loaded. The profile no longer needs to be processed. The mold is made of durable steel and made up out of several parts. The inside is chromed. The programmable computer controls the controls of the machine. The computer controls the pull speed, cutting length and various temperatures of the mold heating.
  • 5
    Step 5
    The two pulling devices take care of the alternating clamping and crossing of the profile. The clamps are shaped like the outside of the profile and are coated with soft plastic so that the profile does not get damaged.
  • 6
    Step 6
    The shortening saw moves the same speed as the production speed and cuts the profile to the desired length. Because the saw moves along the profile, the sawcut is quite angular. The saw blade has a diamond layer so it can last long. A dust extraction is also provided at the saw.

Production

Pultrusion is a processing technique that was developed further to meet the increasing demand for glass fibre reinforced composites with good mechanical and physical properties. This production method of reinforced polyester profiles enables us to respond to the wishes of constructors regarding material properties and construction possibilities. The most important variables are fibre reinforcement, type, quantity and fibre orientation, which strongly influence the mechanical properties of the profiles.

Glass is by far the material most widely used for fibre reinforcement; The different types of glass fibre reinforcement are used in the form of smooth unidirectional roving (direct draw), unidirectional spun roving (bulkies), mats, woven roving and combination mats (with loose fibres or surface mats). Apart from rovings, which must always be used for technical reasons, it is often desirable to also use mats and/or fabrics to achieve a certain level of lateral strength.

For improved weather resistance, a synthetic (mostly polyester) surface film is often used as it gives the glass fibre reinforcement of profiles a protective layer.

  • STEP 1

    The process starts with the input of the optical fiber reinforcements. In front are the glass shelves where the fiber optic cables are placed on reels.
    Every reel has approximately 2,1 kilometer of fiber optic string from for instance 9600 TEX.

  • STEP 2

    At the impregnation bin, the fiber optic wires and possibly the mats are provided with polyester resin. The liquid polyester resin is mixed with hardener, dye, flame retardants and other additives.

  • STEP 3

    The input plates guide the fiber optic wires and mats to the correct position in the mold and ensure a proper glassware. The fiber optic strands ensure a good length gain and the mats provide cross reinforcement. The asset depends on the properties that are requested from the profile.

  • STEP 4

    The resin, fibers and mats are then pulled through a heated mold. The heated mold forms and cures the profile. Halfway through the mold the material will cure, and once out of the mold the profile is completely cured and can be mechanically loaded. The profile no longer needs to be processed. The mold is made of durable steel and made up out of several parts. The inside is chromed. The programmable computer controls the controls of the machine. The computer controls the pull speed, cutting length and various temperatures of the mold heating.

  • STEP 5

    The two pulling devices take care of the alternating clamping and crossing of the profile. The clamps are shaped like the outside of the profile and are coated with soft plastic so that the profile does not get damaged.

  • STEP 6

    The shortening saw moves the same speed as the production speed and cuts the profile to the desired length. Because the saw moves along the profile, the sawcut is quite angular. The saw blade has a diamond layer so it can last long. A dust extraction is also provided at the saw.