Coating apparatus – With cutting – punching or tearing of work – Strand form work
Patent
1996-01-04
1998-07-14
Czaja, Donald E.
Coating apparatus
With cutting, punching or tearing of work
Strand form work
428378, 118307, B05C 1100, D02G 300
Patent
active
057797935
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention refers to a device for feeding out reinforcement fibres at production of thermosetting plastic products, which device includes at least one magazine spool for a fibre thread, and guiding means for guiding the fibre thread out to a fibre feedout head, which feedout head is provided with feeding means for feeding the fibre thread from the magazine spool via the guiding means, and cutting means, which enables cutting of the fibre thread, wherein the feeding means of the feedout head includes on one hand driven feed rollers, which form at least one nip for the fibre thread and on the other hand fibre ejecting means.
BACKGROUND OF THE INVENTION
The production of fibre reinforced thermosetting plastic products is difficult to automate, since the quality of the product is highly dependent on the orientation of the fibres, with regard to how the product will be subjected to load. Modern quality conditions usually implies that a product should have an exact amount of fibres, which are oriented for maximum strength, without the fibres projecting out through the outer plastic layer of the product.
One manufacturing method implies that fibre carpets are preformed to desired shape and exerts the preform to heat treatment for activation of a bonding agent keeping the fibres together. The edge of the preform, produced in this manner is usually cut manually, so that excess fibres are removed at the edges before the final casting of thermosetting plastic takes place. The application of fibre carpets and the need of manual removal of excess fibres means that this manufacturing method is expensive. Furthermore, the strength of the fibres is utilized only to a small degree.
Consequently, there are possibilities for improvements in this field, which improvements by automation of the manufacturing process provides better use of the material, so that structures repeatedly can be made lighter, material acquisitive and technically more advanced. Thereby, even possibilities of reducing the problems of poor working environment and wear of manpower are obtained.
THE TECHNICAL PROBLEM
The object of the present invention is to provide a device for feeding out reinforcement fibres at production of thermosettable products, which makes it possible to automate the supply of reinforcement fibres to a product, e.g. by use of an industrial robot, thus that preforms may be produced repeatedly from fibre thread with the fibres arranged in endless coils, cut fibres with regular orientation and cut fibres with irregular orientation.
THE SOLUTION
For this purpose the invention is characterized in that the cutting means are driven individually from the feed rollers and located between said rollers and the fibre ejecting means, and that the cutting means includes a driven knife roller with outwardly projecting knife blades and a backing roller, which is operable to positions in engagement with or non-engagement with the knife roller.
DESCRIPTION OF THE DRAWINGS
Hereinafter the invention will be described with reference to embodiments shown in the accompanying drawings, on which
FIG. 1 shows schematically a feeding out device according to the invention as seen from the side,
FIG. 2 shows in bigger scale an angled section forming part of the feeding out device,
FIG. 3 shows in a scale corresponding to FIG. 2, as seen from the side, a feedout head forming part of the feeding out device.
DESCRIPTION OF EMBODIMENTS
The device schematically shown in FIG. 1 includes a magazine 10 for fibre thread spools 11, a magazine 12 for pulverulent bonding agent, a feedout head 13 for fibre thread and bonding agent, and a control center 14.
The feedout head 13 is preferably mounted on a robot arm 41, which is freely movable in the room and is governed by a micro processor 42, which can be programmed.
The fibre thread 15 runs via a feeding device up to the feedout head 13. The feeding device includes end pieces 16, straight tubular pieces 17 and angled pieces 18. The end piece 16 situated closest to the thread spool
REFERENCES:
patent: 4806298 (1989-02-01), Wilkinson et al.
patent: 4869863 (1989-09-01), Iwai et al.
Aplicator System AB
Czaja Donald E.
Padgett Calvin
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