Pultrusion line

Due to the nature of the process the reinforcement must be continuous, either in the form of roving packages or rolls of fabrics or mats. The reinforcement is stored in a creel stand that is of the simplest possible rack construction because no significant loads, except the weight of the reinforcement, normally need to be supported. The entire creel stand is often placed on wheels to allow off-line preparation of reinforcement supply and rapid reconfiguration of a pultrusion line. 

Pultrusion Initially, a pultrusion line was run using a caterpillar traction unit and this was replaced by a hand-over-hand unit, which was much kinder to smaller sections. Several epoxy systems were successfully developed [154]. 

Epsilon Composites, Gaillan, France—pultrude carbon fiber tubulars and profiles with 12 pultrusion lines. Have capability of pultruding thermoplastics including PEEK. 

Figtire 1 (a) Examples of profiles pultruded by V. Kerbiriou [8. (b) Schematic of the pultrusion line used for the production of profiles shown in Figure 1(a). 

With the pultrusion line and materials used here, the following process parameters lead to at least 80% of the maximum shear strength (Xmax 14 MPa as measured by the Lauke test [8]) at pulling speeds of at least 0.3 m/min ... 

The cut-off unit is positioned directly behind the pull-off unit. It enables automatic cutting of the product to a desired length. There are many different methods as to how the design can look. All methods have in common that they have to move with the same velocity as the pultrusion line during the cut. For example, it can be made as a radial arm tape equipped with... 

A numerical model has been developed by Viola etaL (1990) to optimize the operating parameters of a pultrusion line. Their model incorporates a onedimensional finite difference simulation of the pultrusion process. Based on given target parameters, the model primarily optimizes the temperature set points along the die. 

Viola, G., Portwood, T., Ubrich, P. and DeGroot, H. R. (1990), Numerical optimization of pultrusion line operating parameters , 35th International SAMPE Symposium and Exhibition - Advanced Materials the Challenge for the Next Decade, Part 2, Anaheim, USA. 

Some pultrusion lines include dust extraction systems for reasons of both environment and tidiness take-off systems that are used to handle and store the produced parts and/or tuimel heaters used for post-die curing operations that improve the physical and mechanical properties of pultruded parts. 

A pultrusion head was designed, built, and mounted on a conventional 60 kN PULTREX pultrusion line (for thermoset matrix composites), thus adapting it to the production of continuous profiles made from thermoplastic matrix towpregs. The pultrusion head (Figure 11) includes three main parts (i) preheating furnace, (ii) pressurization and consolidation die, and (iii) cooling die. 

Table 4 lists the operating conditions typically used in preliminary tests on the pultrusion line. In these tests, well defined U-shaped profiles with smooth surfaces (cross-section 24x4 mm, 2 mm thick) were produced. The towpregs used in the process were made from the GF/PP system (Table 1). 

Fig. 19.38. Pultrusion line. Reprinted from the Pultrusion Technology Handbook with permission of the publisher, RouUedge, Chapman and Hall.)...

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