Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work – To degas or prevent gas entrapment
Patent
1993-04-02
1994-09-20
Vargot, Mathieu
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
To degas or prevent gas entrapment
55DIG46, 118326, 264309, 425 74, 425 96, 425150, 425470, 427421, 427236, 454 50, 901 1, B29C 3902, B29C 3942
Patent
active
053486978
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The industry producing products in reinforced plastic today have great demands of improving both the internal and external environment, and for this to be possible the emissions of styrene have to be reduced.
One way to achieve this is to improve previously used production methods or offer new such methods. The application of plastic material traditionally is carried out by spraying and rolling or by manual application, and by filling and inlay of reinforcement fabric or mats and distance material.
Production by spraying and laying up is carried out preferably in conventional spray boxes, which demand large air flows. This in turn results in a large heating demand, which leads to high heating costs and problems finding sufficiently low cost gas purifier plants.
One object of the present invention is to provide a method for producing large plastic objects in a simple and reliable way.
Another object of the present invention is to provide a method for producing plastic components which is substantially harmless to the environment.
Yet another object is to provide a method for producing plastic components that is energy efficient.
The present invention comprises a method and apparatus for producing plastic components with minimal escape of harmful substances into the environment. The apparatus includes a casing placed over a hollow body form. The casing includes a cover which defines an opening having an adjustable size and position. The opening provides access into the body form so that reinforced plastics may be applied therein. The size of the opening may be minimized to reduce the amount of harmful substances, such as styrene, escaping from the body form. The position of the opening relative to the body form is adjustable to provide a convenient access into the body form when reinforced plastics are applied therein.
DESCRIPTION OF THE DRAWINGS
In the following the invention will be described in closer detail with reference to diagrammatically shown embodiments in the accompanying drawings.
FIG. 1 shows in perspective view a device according to the invention for the production of a ship body with the method according to the invention.
FIG. 2 is a longitudinal section through a variant of the device according to FIG. 1 intended for the production of smaller objects.
FIG. 3 shows a view from the end of a modified design of the device according to the invention.
FIG. 4 is a lateral view of the device according to FIG. 3.
FIG. 5 shows a view from the above of the device according to FIG. 3.
FIG. 6 is a perspective view of the device according to FIG. 3.
FIG. 7 and 8 show in perspective view two different designs of a supply air terminal device contained in the device according to the invention.
FIG. 9 shows in perspective view an alternative embodiment of the device according to the invention.
FIG. 10 shows a further alternative of covering for the device according to the invention.
FIG. 11 shows in a diagrammatic sectional view of still another embodiment of the cover for the device according to the invention.
FIG. 12 shows diagrammatically the device according to the invention connected to an air circulation system.
FIG. 13 shows diagrammatically in a view from the above a device according to the invention with circular basic form, and FIG. 14 in a diagrammatical sectional view a further modification where the device is designed in the shape of a hangar.
DESCRIPTION OF PREFERRED EMBODIMENTS
The invention is illustrated in FIG. 1 in connection with production of a ship body by means of a body form 1, around the open side of which is arranged a frame formed casing 2, which in the example shown is rectangular and completely encloses the open side of the form. At the opposite short sides 3 of the casing 2 are provided exhaust terminal devices 4 connected to a plant not shown by means of which the exhaust air is cleaned and out of which heat can be retrieved.
The upper open side of the casing 2 in the example shown is provided with two covering units 5, 6, e.g. in th
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Maupoix Max
Palmers Goran
Institutet for Verkstadsteknisk Forskning
Vargot Mathieu
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