Method of creation of roof element made of plant fibres moulded under pressure, bitumen-impregnated, and roof element, in particular, ridge element, cant board, border around hole in roof, or roof element for edge of roof

FIELD: building industry.

SUBSTANCE: during the first stage an element is created, preferably, of cellulose, using hot moulding under pressure in the mould, during the second stage, as soon as the element has a solids content of at least 60% after its release from the mould, the said element is covered by a pigmented lacquer and dried; and during the third stage, as soon as the element has a solids content of at least 98% the said element is impregnated with hot bitumen. Specific operating conditions are set. The covering elements comprise, in particular, a side portion of the ridge, a ridge cap, a set of the ridge roof covering, a cant board, or a border around a hole in the roof, and a hipped roof element for the creation of connection between two planes of the roof.

EFFECT: increase in reliability.

15 cl, 12 dwg

 



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to woodwork. Wood-fibre plate comprises wood fibres, polyacrylamide resin representing an amphoteric-ionic resin containing monomers with cation groups and monomers with anion groups related to 7:3 - 3:7 in molar ratio that features molecular weight of 800000 to 3000000, and cationic paraffin. Wood-fibre board production comprises application of suspension with concentration of solids of 2-3 wt % and pH 3-5 and addition of polyacrylamide resin and paraffin to said suspension.

EFFECT: higher strength of and water resistance.

3 ex, 1 tbl, 4 cl

FIELD: textile, paper.

SUBSTANCE: invention relates to manufacture of products from fibrous material, namely egg cartons, glasses for drinks, food trays. There used is the first device which is permeable to air and water and the second device which is heated up to temperature at least 220°C. Raw material is supplied to a forming bath. The first device is submerged into it and the initial product is shaped on it by means of application of negative pressure through it. After the first device is taken from initial raw material, it is supplied to the second device. Formed product from fibrous material is placed between the first and the second device. It is heated with the second device with evaporation of at least some water contained in the shaped product from fibrous material. Water is removed until dry matter content in it is at least 70%; after that the product is subject to drying with superhigh frequency radiation.

EFFECT: providing uniformity of strength properties of the product, effective dehydration and preventing its surface being burnt through.

29 cl, 33 dwg

The invention relates to fibrous cellulosic materials and can be used in the field of building materials in the form of sheets and plates intended for thermal insulation of buildings and structures, furniture industry and other sectors of the economy

The invention relates to woodworking, and more particularly to a technology for fibre materials, mainly used for the production of plates

The invention relates to woodworking, timber and pulp and paper industry and can be used in the production of environmentally friendly solid wood-fibre boards (MDF) wet

The invention relates to the production of fibrous material having good heat and sound insulation properties and is intended for use in construction, shipbuilding, aerospace, industrial and furniture industry and other sectors of the economy

The invention relates to the pulp and paper industry, and in particular to methods of obtaining pressed lignocellulosic materials, mainly wood chipboard, for construction and decoration purposes

The invention relates to woodworking industry and can be used in the manufacture of flooring, furniture parts, parts for decoration of halls and wall panels

FIELD: textile, paper.

SUBSTANCE: invention relates to manufacture of products from fibrous material, namely egg cartons, glasses for drinks, food trays. There used is the first device which is permeable to air and water and the second device which is heated up to temperature at least 220°C. Raw material is supplied to a forming bath. The first device is submerged into it and the initial product is shaped on it by means of application of negative pressure through it. After the first device is taken from initial raw material, it is supplied to the second device. Formed product from fibrous material is placed between the first and the second device. It is heated with the second device with evaporation of at least some water contained in the shaped product from fibrous material. Water is removed until dry matter content in it is at least 70%; after that the product is subject to drying with superhigh frequency radiation.

EFFECT: providing uniformity of strength properties of the product, effective dehydration and preventing its surface being burnt through.

29 cl, 33 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to woodwork. Wood-fibre plate comprises wood fibres, polyacrylamide resin representing an amphoteric-ionic resin containing monomers with cation groups and monomers with anion groups related to 7:3 - 3:7 in molar ratio that features molecular weight of 800000 to 3000000, and cationic paraffin. Wood-fibre board production comprises application of suspension with concentration of solids of 2-3 wt % and pH 3-5 and addition of polyacrylamide resin and paraffin to said suspension.

EFFECT: higher strength of and water resistance.

3 ex, 1 tbl, 4 cl

FIELD: building industry.

SUBSTANCE: during the first stage an element is created, preferably, of cellulose, using hot moulding under pressure in the mould, during the second stage, as soon as the element has a solids content of at least 60% after its release from the mould, the said element is covered by a pigmented lacquer and dried; and during the third stage, as soon as the element has a solids content of at least 98% the said element is impregnated with hot bitumen. Specific operating conditions are set. The covering elements comprise, in particular, a side portion of the ridge, a ridge cap, a set of the ridge roof covering, a cant board, or a border around a hole in the roof, and a hipped roof element for the creation of connection between two planes of the roof.

EFFECT: increase in reliability.

15 cl, 12 dwg

FIELD: pulp and paper industry.

SUBSTANCE: invention relates to tooling for moulding articles from cellulose. Device for moulding comprises a mould and a support plate with a cavity and flat support surfaces. Mould has porous body made by sintering and having outer moulding surface and inner surface. Mould inner surface is machined after sintering powder zone. Said mould surface zone is intended for connection with support surfaces of support plate to make vacuum chamber.

EFFECT: producing a high-quality mould, which does not require a large amount of energy for heating of shaping surface, a method which does not require high time expenses.

15 cl, 11 dwg

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