RU2244078C2 - Method and device for granular coating application on wood-based panels - Google Patents

Abstract

FIELD: building units, particularly for producing decorative panels for facing outer surfaces of wooden prefabricated house.

SUBSTANCE: method involves applying adhesive on panel surface; impressing granular material in adhesive applied on panel from below by pressing thereof to panel surface. Before granular material application panel is impregnated in melted industrial sulfur and then pre-coated. Device for granular material application includes container having through orifice, height-adjustable rod fixedly secured to plate by one end thereof and having pedal pivotally connected to another rod end. Rod may be displaced. Plate is made as container bottom for granular material movement to panel from below with pressing granular material in adhesive applied on panel secured in container by clamps. Panel faces granular material by surface coated with adhesive.

EFFECT: increased efficiency due to increased bonding strength of adhesive layer with panel and granular material with adhesive layer.

2 cl, 2 dwg

Description

The invention relates to the field of construction, namely to the manufacture of tiled elements for finishing the outer surfaces of wooden prefabricated houses.

A known method of applying granular coatings on the outer surfaces of buildings and on the details of the facade and device for its implementation. Coatings are applied by pneumatic spraying with a spray gun and crumbs of simultaneously adhesive sublayer (polymer paste) and grain materials - crushed rocks - quartzite, marble, colored slag, glass break [Methodical recommendations for surface finishing with fine-grained decorative coatings - M .: TsNIIOMTP, 1987. - p. 4-8].

The disadvantage of this method and device is that they are designed for the decorative treatment of hard surfaces - concrete, cement plaster, reinforced cement, asbestos cement [Methodical recommendations for surface finishing with fine-grained decorative coatings - M .: TsNIIOMTP, 1987. - p. 4]. In addition, the method is excessively intense with respect to wood boards - fibrous, particle board, cement particle board (DSP).

A known method of applying a granular coating, according to which a granular coating is obtained by pressing a concrete mass, cement or polymer-cement mortar into a layer of grain evenly distributed on the bottom of the mold in which the facade part is made. The grains are set with concrete or mortar, and after removing the facade part from the mold, a grain decorative layer remains on its outer surface [Malyshev V.P., Kulik G.N., Savelov R.V. The practice of applying new textures of building facades. - M .: Stroyizdat, 1965. - S. 51-52].

The disadvantage of this method and device is that a non-hardened surface is finished with a grain coating, it also serves as an adhesive sublayer, while for finishing wood boards, you need your own special sublayer, which adheres well to both grain and the surface of the plate.

Closest to the proposed is a method of applying granular material to the surface of building products using a special device - a hopper, from which the granular material is captured by air, exits with a vertical stream, is reflected by a mesh screen placed at an angle and falls onto a surface to be coated with an adhesive material [A.s . USSR No. 385013. Device for applying granular material to the surface of building products. M.cl ³ . E 04 F 21/12 / L.M. Yaroshevsky, A.P. Nedodatko, A.V. Bortsov, G.V. Severinova. Publ. 05/29/73. Bull. No. 25].

The advantage of the known prototype method is that the granular material is pressed into the adhesive layer under the influence of the mechanical action of the jet, however, falling on a vertical surface, the grains that are weakly fixed in the adhesive mass crumble, become contaminated and go to waste, which increases the consumption of the granular material, leading to higher cost method and reduce its effectiveness.

The closest analogue of the device for applying a granular coating on wood boards is the invention “Table facing” [A. USSR No. 949128. M.cl ³ . E 04 F 21/00 / A.S. Aces. Publ. 08/07/82. Bull. No. 29]. The device (Fig. 1) includes a box with a stucco mortar, a shelf 2 with an opening 3, a rod 4 adjustable in length, having a tile laying area 5 at one end, and a pedal 6 articulated at the other end. The rod moves in the guide 7, mounted in the bracket 8, has an adjustable part 9 with a control handle 10. Using a rod controlled by the pedal 6, the tile with a layer of plaster applied to its back surface is pushed out by a horizontal platform 5. Next, the tile with the plaster layer applied is removed from this site.

The disadvantage of this device is that with its help it is possible to apply a plaster (adhesive) layer only from above and level it flush with the surface of the shelf, leaving no possibility to fix the granular coating.

The technical problem solved by the invention is to reduce the cost of the method of applying granular material, increasing the efficiency of the method and device for its implementation.

This problem is solved by the fact that in the method of applying a granular coating on wood boards, including applying an adhesive layer to the surface and pressing granular material from below onto an adhesive coated surface, according to the invention, the granular material is pressed against the surface of the wood panel, and before applying the adhesive layer the plate is impregnated in a technical sulfur melt, then primed.

This problem is also solved by the fact that in the device for applying a granular coating on wood boards, including a box having a through hole for the stove, a rod adjustable in length, rigidly connected at one end to the platform and having a pedal articulated at the other end, the rod installed with the possibility of movement, according to the invention, the platform is made in the form of the bottom of the box, moving the granular material from the bottom to the plate, pushing it into the adhesive layer of the plate located in the box facing the adhesive layer m to granular material and secured with clamps.

The method is as follows: finishing wood board, for example DSP, cut into a given format, is impregnated with a hydrophobic substance to stabilize dimensions during outdoor use and prevent swelling from the adhesive applied to its surface. Impregnation is carried out in a technical sulfur melt at 155 ° C. Next, latex soil is applied with a brush to the surface to be trimmed with a brush and, under the action of the hard hairs of the brush, it is mixed with sulfur powder separated by a brush from the surface of the impregnated plate.

The presence of sulfur particles in latex soil can further contribute to the vulcanization of rubber globules in latex and form a rubber-like film firmly adhered to the surface of the plate. A layer of polymer-cement adhesive is applied to the uncured soil, intended for the incorporation of external coating grains into it.

An impregnated gray plate with a primer applied on it and an adhesive polymer-cement layer is laid horizontally down with an adhesive layer in a hopper box, filled to the top with calibrated granular material, and fixed with clamps. Using the pedal, the moving bottom of the box raises the amount of grain loaded into it and presses it from the bottom up to the adhesive layer. Thanks to the preliminary heating of the grain under the influence of the heat emanating from it, the grain quickly sets with an adhesive layer. After that, the pedal is lowered, the clamps are turned away and the plate with adhering grain is sent to complete maturation - fixing the grain. Then, in the same order, the grain is applied to the next plate.

The proposed device (figure 2) has a table 1, in which is mounted a box 2 with a movable bottom 3, rigidly mounted on a vertical rod 4. The box is filled with granular material 5. For applying granular material to the plate 6, the latter is laid down in the box with an adhesive layer and fixed clamps 7 using the lever pedal 8, supported by a stop 9 and balanced by a load of 10, the rod 4 is lifted along the guide 11 along with the movable bottom 3 and the upper layer of the mass of grain 5 is pressed into the adhesive layer.

Due to the presence of latex soil on the surface of the plate and the heating of the granular mass, the grain layer forming a protective and decorative surface, quickly and firmly adheres to the adhesive layer. Next, the clamps 7 are turned away and the plate 6 with a granular coating is removed from the box.

The present invention can be used in construction for decoration of the external surfaces of wooden prefabricated houses.

Using the present invention will improve the efficiency of applying a granular coating by increasing the adhesion strength of the adhesive sublayer with the plate, and grains with an adhesive layer. The invention is characterized by ease of execution and economical use of grain and adhesive compositions.

Claims (2)

1. The method of applying a granular coating to wood boards, including applying an adhesive layer to the surface and pressing the granular material from below into the surface coated with an adhesive layer, characterized in that the granular material is pressed into the surface of the wood panel, and before applying the adhesive layer, the plate is impregnated into melt technical sulfur and then primed. 2. A device for applying a granular coating, comprising a box having a through hole, a rod adjustable in length, rigidly connected at one end to the platform and having a pedal pivotally attached to the other end, the rod being movably mounted, characterized in that the platform is made in the form of the bottom of the box, moving the granular material from the bottom to the plate, pressing it into the adhesive layer of the plate, fixed in the box with clamps and facing the adhesive layer to the granular material.

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