SU1237457A1 - Method of manufacturing layer panels - Google Patents

Description

The invention relates to construction and is intended for the manufacture of layered enclosing structures and supporting elements for construction and refrigeration.

The aim of the invention is to increase the strength of the produced laminated panels due to the differentiated distribution of the foaming composition and uniform wetting of the surface of all the filler granules.

The method is carried out as follows.

The bottom facing sheet is laid into the mold cavity and some of the filler granules are poured. Then, casting injectors are installed in the form of perforated tubes, the number of which and the dimensions of perforations are assigned depending on the productivity of the casting machine, the size of the panel and the technological parameters of the foaming composition. After the installation of the filling injectors, the rest of the filler granules are filled and the upper facing layer is laid, then the mold is closed. The perforated tubes are in the middle of the granulate layer of filler, the perforations are parallel to the base of the mold.

The diameter of the perforated tubes corresponds to the diameter of the casting die of the casting machine, which allows the foaming composition to be supplied over long distances with virtually no pressure loss in the tube.

By changing the ratio of the diameters of the perforations to the diameter of the tubes, you can create the required pressure at the outlet of the composition from each perforation, which makes it possible to adjust the amount of the composition poured out of it and adjust the density of the foam along the length and width of the panel. Then, the foaming composition is poured through the casting injectors, followed by foaming of the composition.

After the foaming and curing process is complete, the perforated tubes remain in the product and are reinforcing elements. The fabricated laminated panels have an increased bearing capacity, since perforated tubes filled with foam and left in the construction play the role of reinforcement and reinforcing elements.

Editor Y. Sereda Order 3241/19

Make up. 1 T. Nebytova

Tehred I. VeresKorrektor L. Pilipenko

Circulation 640 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

five

0

Q

50

0

The introduction of the foaming composition under pressure directly into each specific area of the molded product allows reliable wetting of the surface of all mineral filler granules and facing sheets, which leads to an increase in adhesion strength at the contact boundary of the foaming composition with the granules of the filler and with the outer skins.

The proposed method is illustrated by the following examples.

Example 1. On the stand equipment, a laminated panel with the size of 3x1x0.1 m is made, faced on one side with a metal profiled sheet and on the other side with fiberglass. The polyurethane composition is poured into a closed mold through two perforated tubes, the length of which corresponds to the panel length. The end of the tube goes through the hole in the end of the form, and the perforated holes are directed parallel to the metal lining. For this purpose, rigid PVC tubes with a diameter of 19 mm are used. Seven perforation holes with a diameter of 2-6 mm are made along the length of the tube, with the perforation pitch changing and being in the range of 200-500 mm. The delivery of the foaming composition to each tube is made from a Torsioma filling machine with a capacity of 22 liters per minute. The pouring time of the foaming composition into each tube is 30 seconds. The consumption of polyurethane foam on the I m panel is 5.5 kg. Foaming and curing of polyurethane foam in the panel is performed in mode. A laminated panel is well formed. The fiberglass layer is completely foamed with polyurethane foam. The adhesion of the foam to the outer and inner linings is good.

Example 2. On the stand equipment, a laminated panel of 3x1x0.1 m is made, lined on one side with a metal profiled sheet and on the other side with a canvas. Polyurethane composition is poured through two perforated tubes, analogously to example 1. Granules of extra lightweight expanded clay are applied to the mold at the rate of filling the volume of the mold by 90%. The mold is closed and the foaming composition is poured as in Example 1. The consumption of polyurethane foam per meter panel is 6 kg. The quality of the foam in the laminated panel is good.

Claims (2)

1. METHOD OF MANUFACTURE LAMINATED PANELS, including laying in the form of facing sheets, installing a pouring injector in it, filling the granules of the filler and pouring the foaming composition with its subsequent foaming and curing, characterized in that, in order to increase the strength of the manufactured laminated panels due to the differentiated distribution of the foaming composition and uniform wetting the surface of all granules of the filler, before installing the filling injectors, first part of the granules of the filler are laid, and after their installation imposes the rest of the granule filler, followed by pouring the foamable composition through the injectors and produce after curing the laminated panel with the reinforcing elements of the casting injectors. 2. The method according to π. 1, characterized in that the reinforcing elements are made in the form of perforated tubes. SU, 1237457>