SU1750948A1 - Method of manufacturing wooden flexibly glued parts - Google Patents

Abstract

This invention relates to the manufacture of. bent wood parts and can be used in the woodworking industry. The purpose of the invention is to increase productivity and improve the appearance of products. The method involves the following operations. Preparing the surfaces of the blanks for gluing, in which a pair of wood of different species is picked up in each pair to be glued; then cutting along their length self-jamming spikes, applying glue, crimping the blanks in the rollers and their subsequent rolling in other rollers, the distance between the axes of which in each pair and between the pairs decreases in the direction of feeding the glued blanks. 3 il. SO with

Description

The invention relates to the production of bentwood parts from wood and can be used in the woodworking industry.

The purpose of the invention is to increase productivity and improve the appearance of parts.

FIG. 1 shows a device for making bent-glued wood parts; in fig. 2 is a sample of a part obtained according to the invention; Fig, 3 - the process of bending the workpiece.

The method for manufacturing bent-glued wood parts involves cutting 1 onto the surfaces to be glued along the length of the self-sticking spikes. After that, glue 2 is applied on the surfaces with cut spikes and the blanks to be glued are fed to a pressing device, which is a series of sections 3. In sections 3, the pressing of the glued blanks 4 and 5 is performed. Each section is a supporting drive roller 6 and a pressure roll 7. The latter has a mechanism for adjusting its position throughout the thickness of the product (not shown) and is equipped with a hydraulic cylinder 8 for crimping the blanks. The drum 7 is spring-loaded by means of the spring 9 relative to the body of the hydraulic cylinder 8. The axes of the rollers 6 and 7 in each pair lie in planes that (in the number of sections 3) are parallel to each other.

After crimping, the glued blanks 4 and 5 arrive at the rolling operation in rollers 10 and 11, which are arranged in pairs 12. The distance between the axes of rollers 10 and 11 (Fig. 3) in each pair decreases in the direction of feeding the glued blanks (). In addition, decreases in

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the same direction and distance between the pairs 12 of rollers 10 and 11 (). Rollers 10 in each pair have a mechanism for adjusting their position in height (not shown) to create different degrees of compression of the glued blanks during rolling and setting the required offset of the rollers in adjacent pairs. Roller pairs 12 can be made adjustable along the length of glued blanks to create different rolling modes depending on the properties of the blanks.

When implementing the method, blanks of different breeds are selected as blanks to be glued. As the blank 4 (figure 1). which, in the finished product, acquires a convex shape, should use a softwood billet (birch, pine, etc.). As billet 5, which takes a concave shape in the finished product, you should use a hardwood billet ( oak, beech, etc.).

The combination of wood species in the finished product is determined both by the requirements for the appearance of the product and by the ability of these species to be rolled and altered by the linear dimensions of the blanks. Thus, when rolling glued blanks in rollers, the rolled surface of the blank 5 of harder rock (Ca) lengthens by an amount smaller than the surface of the 4 soft rock blank (Ci). those. the final length of the billets after rolling is characterized by the ratio. Since the workpieces are rigidly fixed one relative to another along the surface of Co. then as a result of relative

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extending their outer sides, the glued part bends toward the workpiece with a lower elongation.

Depending on the wood species used, one or another amount of rolled rollers is introduced with an appropriate degree of reduction. In connection with the tendency of glued blanks from pair to pair of rolling rollers to bend more and more, each subsequent pair of rollers should be as close as possible to the previous one, since the distance between the pairs of rollers should decrease in the feed direction.

Claims (1)

Claims The method of manufacturing bent-glued wood parts, including preparing the surfaces of the workpieces by cutting along the length of the workpieces of self-sticking spikes, applying glue and pressing the glued workpieces using at least two pairs of supporting drive and pressure rollers, characterized in that, in order to increase productivity and to improve the appearance of the parts; a billet of soft wood is used as a blank on the convex side of the bent-glued part, and on the concave side The solid wood is cast, the axes of each pair of drive and pressure rollers are arranged in a plane parallel to the axes of the adjacent pair, and after crimping, the glued blanks are rolled in at least two pairs of rollers, the distance between which axes in each pair and between pairs, decreases in the direction of feeding the glued blanks. 1 k A , s Fa.H.