SU91534A1 - Method of gluing laminated wood materials - Google Patents

Description

The technique of gluing plywood and, in general, wood laminates consists in that packs assembled from sheets of iyin are removed by pressing in hydraulic presses equipped with hot plates, with hot, gluing, steam. The specific pressure used for skling plywood is in the range of 8-25 kg.yy. As a result of the application of this pressure, pressing (gluing) the plywood ultimately acquires the pressing of 10-12% of its initial thickness, which consequently leads to an excessive expenditure of wood.

The specific pressure during compaction (piling) of plywood 18-25 kg / cm is not, however, the minimum pressure that is caused by the very physical stability of the wood gluing process. This kind of specific lamina of the UK SC,; Sivap 1 and I1;: I-gc is the result of the gluing method itself, which consists in the use of hard its, in connection with which it is destroyed ;; r1p; 1c; , 1-: otor; e, 1 is known. cc vch ch ls; ; i; : ni ;;. : K v; i | etsa due to: i t ius: on them perovnistype and comp.-adI Hejia BHOAierHioii to.hishy schiona.

The proposed method of gluing laminated wood materials. It has the value of one of the most important shortages.

C; especially. this way shlspvapn that. that the material that is shrinkable, due to the dense compression of the frame but the edges (;) of the global composition, forms the structure. in to:) the second pnod ;; t: source; e:; la and daplerpu, provision of obyvayaniyaUs: the process of the process; to, from: 1аа; n.

Int, Bepxneii and Podun: feces; ; mchalavlivayutsya, mki, between which zaklitsizayutsya And |} esmusmmye of /.choystyyyyyyyyyu materials. Avoid 1e sagging packages sob; pa No. 91534-2 -

on gaskets. The number of .tsts in the package is the same as with the usual lressovanin.

The press is pressurized and the frames are clamped, clamping the extruded bags along the edges along the edges. Due to the fact that the frame area is small, the sealing of packages along the periphery is easily achieved and, thus, the gaps between the packages are sealed to where the source of heat and pressure (steam, groove, liquid) is heated, which heats the packs to 15 ° C to 200 tons. at the same time it carries out uniform pressure in the order of 6-8 kg / lc; over the entire surface of the compression bags. Holes are provided for the introduction and release of the heat source.

For better sealing, the grooves are provided in the frame: Silo and protrusions.

Packages can be loaded both in thin steel gaskets (0.5 lly 4 in thickness), and without them. In the first case, you can use the usual satinized lars found on all plywood mills.

In the second case, it is necessary to use dry, superheated pasta, rum, the receipt of which is also not difficult. With superheated steam (it is also possible to glue the plywood out of the raw veneer, making it dry, so that there is a free moisture release.

B: The place of steam can be mixed with gas (for example, hot air, hot gases) or liquid.

The proposed method of gluing can be implemented in a number of industries and, first of all, in plywood, which will reduce the consumption of wood in the production of plywood, reduce its volume weight, and provides it with more stable and uniform physico-mechanical properties.

Subject and content

A method of gluing laminated wood materials, characterized in that the material being glued, due to the dense compression of the frame along the edges of the formed packages, forms a space in which a heat and pressure source is introduced.