veneer joint gluing machine

Description

[0001] Veneer joint gluing machine The invention relates to a machine for joining veneers and without the aid of paper or to glue other strips together at the edges. The veneer joint gluing machines known to date require that, before the veneers are glued together by means of... The machine can be assembled by applying either glue or a setting agent to the edges and allowing it to dry. must be. If glue was applied first, the glued edges were moistened with a setting agent in the machine. If first Once the setting agent was applied, the application of the glue to the edges was done by the machine. Thus, there was always some preparatory work involved. Pre-treatment of the edges to be glued is necessary.

[0002] Efforts have already been made to combine the application of the glue and the assembly of the joints in a single joint gluing machine. To carry out edge-glued veneers, this has not yet been successful because the freshly applied glue does not dry within the few It dries and sets sufficiently in seconds while passing through the machine.

[0003] Only according to the invention has the solution to this problem been made possible, namely by the fact that before the machine's path, On which the joining and assembly of the veneers is effected, a section is now arranged on which the glue is first applied. applied and then dried, so that now both tasks are properly carried out in the single machine and during the uniform process The process of passing through the veneers can be achieved in a quite satisfactory manner.

[0004] For this purpose, the joint gluing machine has a device to hold the veneer sheets in place throughout the entire treatment process. to convey evenly through the machine, in such a way that a gap remains free between them, in which the glue or The setting agent is applied to the edges and then dried using a stream of heated air, then the Setting agent is applied (or vice versa, first the setting agent and then the glue), whereupon the veneer sheets are tightly joined together and pressed together, they pass through the actual gluing area.

[0005] An embodiment of the joint gluing machine is shown in the accompanying drawings. Fig. i is a side view.

[0006] Fig. 2 shows the machine in front view, Fig. 3 a representation of Fig. 2 on a larger scale, partly in section.

[0007] Fig. q. is a section along line A-B of Fig. 1. Fig. 5 shows, in a schematic plan corresponding to Fig. 4, how the veneer sheets pass through the machine.

[0008] The worktable i of the joint gluing machine is provided in its longitudinal direction with a channel-like recess 2 through which in As is known, a conveyor chain 3 runs over chain drums 4 and 5. The chain drum 4 is driven by an electric motor 6, sprocket 7 and chain. 8 driven, namely in the direction of the arrow shown on the chain in Fig. i. From a mounted on the axle of the chain drum 5 The sprocket g is driven by means of chain io into a shaft ii, on which a gear is mounted between two pull-in rollers d that project slightly above the table surface. The glue application disc b is attached in a manner known per se and is immersed in a glue container a.

[0009] The arm 12 of the machine holds a number of rollers which press down from above the veneer strips 13 to be glued, above the Path of the conveyor chain 3, namely over the feed rollers d, c, which converge somewhat in the conveying direction in a known manner, such that they Press the veneer sheets against the glue application disc b from both sides.

[0010] In the conveying direction, several pairs of rollers f follow, which lie exactly in the conveying direction, i.e., the direction defined by the thickness of the disk b. a specific slit-shaped gap 14 between the veneers is maintained.

[0011] A heating element g is attached to the arm 12 of the machine via the gap 14 in a manner known per se, which is heated in some way, e.g. with steam. or by means of electricity, can be heated and extends down to the veneers 13, but directly above your gap 14 a channel 16 exhibits, through which hot air can be blown by means of a pipe r which is itself heated by a radiator n of any kind, from a Fan k, which advantageously sits directly on the axis of the drive electric motor 6.

[0012] Following the rollers f in the conveying direction are pairs of inclined rollers s which converge in the conveying direction. Approximately Between the first pair of these rollers is a device for applying the setting agent to the edges previously coated with glue, consisting of a container q, a supply line p and an application disc c that acts on the gap section.

[0013] The following converging rollers s then press the veneers 13 tightly together with their edges, while they glue the veneers Push further. Above the glued joint there is again a radiator g' for drying the glue.

[0014] Under the influence of the pressing pressure and the heat, the glue applied to the edges of the veneers now bonds under the influence of the also in The setting agent, which is known to be introduced into the machine, is removed during its passage through the machine.

[0015] As mentioned above, either the adhesive can be applied using the disc b and the setting agent using the disc o, or Conversely, the setting agent is applied using disc b and the glue using disc o.

[0016] If it is possible to use glue to which the setting agent can be added directly, then only the adhesive at the entrance to the machine will be affected. The application device located with the disc b is used, and the application device located in the middle of the chain with the disc o can be left unused. They should remain or be omitted altogether. The same applies if adhesives are used that do not contain any setting agents at all. need.

Claims

[0017] PATENT CLAIM: Veneer joint gluing machine with an application disc for applying glue to the veneer edges, thereby characterized that on the same machine between the glue application disc (b) and the device for joining and pressing together a device is arranged for the veneers, consisting of a conveyor chain (3) and parallel pressure rollers (f) for conveying the glued veneers further veneers while maintaining an edge distance (i4), a radiator (g), a device (l" fa, r, 16) for blowing hot air onto the glued veneer edges and a disc (o) for applying a setting agent, so that the veneers are applied in one step by the glue application- and drying device to the assembly device and through it.