RU2611161C1 - Method of production of laminated wooden glued structure - Google Patents

Abstract

FIELD: woodworking industry.

SUBSTANCE: invention relates to woodworking industry, in particular to the production of wooden glued structures. The glue is applied on the plates of wood blanks, the structure is assembled from blanks and transported to the pressing device. The assembled structure is placed on the support shoes of the pressing device. The pressing of the structure is performed by applying a force on the wall-contact pads. The glued structure is kept under pressure till the adhesive bonding obtains the necessary strength. The final mechanical and protective treatment of the glued structure is carried out. Before pressing the inner wall-contact pads are mounted with the displacement with respect to inner support shoes. The outermost support shoes and wall-contact pads are located opposite each other. Between two adjacent inner support shoes at least wall-contact pad is mounted on the opposite side. The structure is pressed at a pressure providing the allowable relative deflection taking into account the rigidity of the glued structure.

EFFECT: improved quality of gluing the wooden structures.

2 dwg

Description

The invention relates to the woodworking industry, in particular to the production of glued wooden structures that can be used in construction in the form of a supporting beam structure in buildings and structures for various purposes.

A known method of manufacturing wooden glued structures (beams, arches, frames) (Khrulev VM "Production of structures made of wood and plastic", M., "Higher school.", 1989, S. 97), including applying glue to the surface blanks, laying the package of the structure to be glued onto the distributor gasket of the press, through which with the help of screws they create pressure on the package of the structure necessary for good bonding.

The disadvantage of this method is the high complexity and duration of the process of pressing the glued structure. In addition, screw pressing does not ensure uniformity of pressure created by the press screws, which affects the quality of bonding.

A known method of manufacturing a laminated wooden glued structure (Kovalchuk L. M. "Production of wooden glued structures", M., "Lesn. Industry", 1987, S. 127, 142-143), including applying glue to the faces of wooden blanks, assembly of the structure from the workpieces to be bonded, its transportation to the press-fit device, laying of the assembled structure on the support shoes of the press-fit device, press-fit of the structure by applying force to the pressure shoes, pressurization of the structure to be glued to boron compound required adhesive strength, and the final mechanical processing glued protective structure.

However, the method does not ensure the application and maintenance of uniform pressure over the entire area of bonding, since the force from the pressing shoes during pressing the structure is transmitted at individual points of its application. Therefore, to ensure high-quality bonding, the distance between the pressure shoes is set to no more than 400 mm, and the opposite pressure shoes are installed in the same vertical axis as the support shoes, which does not exclude the unevenness of the pressing pressure and at the same time leads to an increase in the number of pressure shoes, thereby increasing the metal consumption of the pressing device.

The technical problem to which the invention is directed, is to improve the quality of bonding, as well as reducing the metal consumption of the press-fit device by reducing the number of pressure shoes.

This problem is solved by the fact that in the method of manufacturing a laminated wooden glued structure, including applying glue to the slabs of wooden blanks, assembling the structure from the blanks to be glued, transporting it to the pressing device, laying the assembled structure on the support shoes of the pressing device, pressing the structure by applying force to pressure shoes, holding under pressure of the structure to be glued until the adhesive strength is set to the required strength, final fur the anic and protective treatment of the glued structure, according to the invention, before pressing in, the internal clamping shoes are installed with an offset relative to the internal supporting shoes, while the extreme supporting and clamping shoes are located opposite each other, and at least one clamping shoe is installed on the opposite side between two adjacent internal supporting shoes , and the structure is pressed in at a pressure that provides an allowable relative deflection taking into account the rigidity of the glued structures ktsii.

The proposed set of features provides the object (method) with new properties: ensuring application and maintaining uniform pressure over the entire bonding area due to the fact that the installation of the internal pressure shoes is performed with an offset relative to the internal support shoes of the press-fit device, and the pressure value is set based on the rigidity of the structure to be glued . In addition, the installation of the internal pressure shoes is performed with an offset relative to the internal support shoes of the pressing device, this allows you to increase the distance between the pressure shoes, which helps to reduce their total number, thereby reducing the metal consumption of the pressing device and increasing its efficiency.

The invention is illustrated by drawings.

In FIG. 1 is a flow diagram of a manufacturing laminated wooden glued structure.

The method includes applying glue to the plates of wooden blanks 1, assembling the structure 2 from the blanks 1 to be glued, transporting it to the pressing device 3, laying the assembled structure 2 on the support shoes of the pressing device, before mounting the internal clamping shoes 4 with offset relative to the internal supporting shoes 5 while the extreme clamping 6 and supporting 7 shoes are located opposite each other, pressing the structure by applying force to the clamping shoes with the help of drocylinders 8, holding under pressure of the glued structure until the adhesive strength is set to the required strength, final mechanical 9 and protective 10 processing of the glued structure.

In FIG. 2 shows a diagram of the press-fit design for options

a) - between two adjacent internal support shoes 4 from the opposite side set one clamping shoe 5;

b) - between two adjacent internal support shoes 4 from the opposite side set at least one clamping shoe 5, for example two.

The method is as follows.

After sorting, the wooden blanks are fed to an applicator, for example, an applicator roller mill, for applying glue to the blanks, then from the blanks to be bonded with glue applied to their faces, the assembly of the construction package is assembled, after which the assembled construction package is transported, for example, using a conveyor belt to a pressing device, for example a vertical vertical hydraulic press, before pressing in, the internal pressure shoes are set to offset m relative to the internal support shoes, while the extreme support and pressure shoes are placed against each other, and between two adjacent internal support shoes on the opposite side, at least one pressure shoe is installed, then after installing the support and pressure shoes, the assembled design package is laid on the support shoes of the press-fit devices, the press-fit of the structure is carried out by applying force to the pressure shoes, while the design is pressed at a pressure of sintering allowable relative deflection, taking into account the rigidity of the structure to be glued, maintain the structure to be pressed under pressure until the adhesive strength is set to the required strength, after unloading the structure from the press-fit device, it is final machined, for example, four-sided longitudinal milling on sequentially installed bilateral C2P8-3 machine and protective processing glued structures, for example, the application of antiseptic and flame retardant manual conventional spray.

Using the proposed method allows to increase the strength of the adhesive joints of wooden blanks in a layered structure by ensuring application and maintaining uniform pressure over the entire bonding area, due to the fact that the installation of internal pressure shoes is performed with an offset relative to the internal support shoes of the pressing device, and the pressure value is set based on from the rigidity of the structure to be glued.

The claimed method is also relevant in that the installation of the internal pressure shoes is performed with an offset relative to the internal support shoes of the pressing device, this allows you to increase the distance between the pressure shoes, thereby reducing their total number, thereby reducing the metal consumption of the pressing device by 5 ... 10% and increasing efficiency his work due to the reduction of operations to configure the pressure shoes.

Claims (1)

A method of manufacturing a laminated wooden glued structure, including applying glue to the plates of wooden blanks, assembling the structure from the blanks to be glued, transporting it to the pressing device, laying the assembled structure on the support shoes of the pressing device, pressing the structure by applying force to the pressing shoes, holding under pressure to be glued constructions up to a set by gluing with the necessary strength, final mechanical and protective gluing design, characterized in that before pressing the internal clamping shoes are installed with an offset relative to the internal support shoes, while the extreme support and clamping shoes are located against each other, and between two adjacent internal supporting shoes on the opposite side set at least one clamping shoe, and the structure is pressed in at a pressure that provides an allowable relative deflection taking into account the rigidity of the structure to be glued.

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