Prepressing device of plywood

Abstract

The invention discloses a prepressing device of plywood, and belongs to the technical field of plywood processing. The prepressing device comprises a fixing frame, a conveying roller, a first pressingroller, a second pressing roller and a side pressing roller. Through a rotating cam, a moving base and a screw are vertically moved, thus height of the side pressing roller is regularly changed; whenthe side pressing roller is upwards moved, the conveying roller is rotated so that a laminate to be pressed is moved; the first pressing roller can primarily press the middle part of the laminate; when the side pressing roller is located at the innermost side of the screw, the bottom end is just contacted with the laminate, the conveying roller stops movement, and the side pressing roller is moved from inside to outside to press the side of the laminate, thus the laminate is completely pressed, the pressing effect is good; after being pressed by the first pressing roller and the side press roller, the laminate is secondly pressed by the second press roller, thus the pressing effect is further improved; by adopting a division pressing method, every part can be uniformly pressed, thereby effectively avoiding the problem caused by large area pressing; the prepressing device is simple in structure and low in production cost.

Description

technical field [0001] The invention relates to the technical field of plywood processing, in particular to a pre-pressing device for plywood. Background technique [0002] Plywood is one of the commonly used materials for furniture, and it is one of the three major boards of wood-based panels. It can also be used for aircraft, ships, trains, automobiles, buildings and packaging boxes. A group of veneers are usually assembled and glued together according to the direction of the wood grain of adjacent layers perpendicular to each other. Usually, the surface board and inner layer board are symmetrically arranged on both sides of the center layer or core. The slab made of the veneer after gluing is criss-crossed according to the direction of wood grain, and pressed under heating or non-heating conditions. The number of layers is generally an odd number, and a few have even numbers. The difference in physical and mechanical properties in the vertical and horizontal directions ...

AI Technical Summary

Problems solved by technology

The existing preloading device usually uses a hydraulic cylinder to control the movement of the upper platen for overall pressing. If the one-time pressing area is too large, the pressing between the laminates is likely to be incomplete, the preloading effect is not good enough, and the hydraulic cylinder is used to control. There is also the problem of complex structure, which increases production costs

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