Device for pressing together objects to be glued or welded, in particular for edge-to-edge joining of thin, disc-shaped plates

Abstract

669,644. Joining boards. SVENSKA CELLULOSA AKTIEBOLAGET. Dec. 29, 1948 [Dec. 30, 1947], No. 33451 / 48. Class 145 (ii). [Also in Groups VIII and XI] Thin board-like objects such as veneer boards to be glued or welded in edgewise relation are pressed against each other by a press having members 2, 3 urged together by magnets 8, 9 and armatures 10, 11; member 3 carrying contact rollers 13 and each member carrying rolls 4, 5 arranged obliquely to urge together the' abutting faces of the objects to be joined. Rolls 4 may be mechanically driven. The magnets are preferably electromagnets. Electrodes 7 set up an H.F. field to harden the glue on the joint.

Description

[0001] Device for pressing together objects to be glued or welded, in particular for edge-wise Joining thin, disc-shaped plates. The invention relates to a device for pressing together, e.g., to be glued, thin, disc-shaped plates. or for joining objects," especially for edge-by-edge joining of thin, disc-shaped sheets, for example Veneering, using presses that move against each other.

[0002] Compared to the devices used previously for joining objects, which have a special frame construction For use in fixing the upper pressing element, the device according to the invention offers a number of significant advantages. It avoids especially bulky, heavy, and expensive frame constructions. Furthermore, its working width differs from that of known designs. practically unlimited. Furthermore, cleaning is very easy, as the upper part only needs to be opened or swung to the side. Finally, when applying the invention for gluing, it is easily possible to use high-frequency radiation for curing. to use alternating current, whereby the distribution of the glue only needs to take place immediately in front of the electrodes, whereas with machines with Heating plates must be used to distribute the glue separately, and drying must take place before curing in the machine.

[0003] The device according to the invention is characterized by one or more magnets, preferably electromagnets, which Pressing organs pulling against each other, with special actuating devices that work together with the objects for the simultaneous pressing against each other the objects are intended to be positioned in a lateral direction.

[0004] ' The invention shall below be described with reference to the drawings, which schematically illustrate an embodiment of a device according to the invention. The process of assembling objects will be illustrated and explained in more detail.

[0005] Figure i shows the device seen from the side, with the upper part representing a section along line IJ of Fig. 2 to show the to make more important parts of the device stand out more clearly.

[0006] Fig. 2 shows the upper half of the device in a top view.

[0007] Fig. 3 illustrates a plan view of the lower half of the device at a stage of progressive assembly. of the objects, whereby some of the objects passing through the device have been cut away for greater clarity.

[0008] The illustrated embodiment, to which the invention is by no means limited, can be described as a press for edge-to-edge gluing of thin discs, for example veneers, can be viewed.

[0009] The press mainly comprises a lower, stationary part, the press table 2, and an upper, movable part, the press element 3.

[0010] The press table, whose upper surface can, for example, have a rectangular shape, serves to hold the items to be joined together. to be worn during the gluing process, whereby the aforementioned items are passed through the press between them in the manner described in more detail below. The parts are moved between the stationary press table and the upper, movable press element. During this movement, the parts are joined and The curing of the glue used for joining. The movement and guiding of the objects through the press is... the illustrated embodiment by means of table-mounted or table-combined, preferably paired, rotatable organs, e.g. rollers-4, in conjunction with rollers arranged accordingly on the movable press '- -organ 3 5 causes. For example, these pairs of rollers, 4 and -5, push the objects forward. These pairs of rollers also have another function. The task is to operate the forward-moving objects in the manner described in more detail below, so that they pass by at the point in the press where the joining and hardening of the glue is to take place, a mutual pressure on the surfaces, along which the joining process is to take place, i.e., they are subjected to lateral pressure. This is achieved by the fact that in each Pair of rollers,--as can be seen from Figs. 2 and 3, the rollers are positioned at a slight angle, such that their axes form an angle when viewed from above. to each other and to the main feed direction of the objects through the press. The rollers -1 are positioned in a suitable manner, e.g. by a common drive device 6, driven in a manner known per se. In or near the upper surface of the press table 2, for example As can be seen from Fig. 3, a number of high-frequency electrodes 7 are arranged, which are connected in a manner known per se to a schematically represented RF power source for high-frequency current can be connected. Numbers 8 and 9 designate the two magnets, preferably electromagnets, which are configured in this way. are arranged so that they each act on an anchor io or ii arranged on or combined with the movable pressing element 3.

[0011] In the embodiment shown, the upper, movable pressing element 3 has a rectangular base section with a preferably vertically upward-facing projecting. Side pieces 12, for example of the shape shown in the drawing. In Fig. i, certain parts, 11. a. the one Side piece 12 has been removed for better clarity. The pressing element 3 is, in addition to the aforementioned rollers 5, also equipped with a A number (eight in the illustrated embodiment) of smaller contact rollers 13 are provided or combined. These rollers are suitably attached to the surface of the pressing element S 3 facing the press table 2, for example - at its center, arranged and in a holder or housing 14, for example, from the version shown in the drawing, attached. In Fig. i, one longitudinal wall of the housing has been removed to accommodate the idarinnen. to show the lying rollers 13. Together with the housing 5,use 14, the rollers 13 form a so-called pressing foot. This pressing foot is mounted on suitable In a4, two beams 15 or the like extending between the side pieces 1:2 are attached and serve to hold the objects during d--s- Assembling in the position to hold over the electrodes7. The contact pressure of the rollers 13 violins on the press table 2 can be, for example, by means of on the The crossbeam 15 is regulated by spring-operated adjusting screws 16, etc. The guide element 17 is designated, for example, that The shape of a vertically standing 1, frame, which serves to guide the z3 pieces of material entering the press, may have.

[0012] The mode of operation of the device according to the invention is essentially as follows: _ The objects to be joined, e.g. two veneer panels i8 and ig (see Fig. 3), are placed on each side of the guide element 17 in the direction indicated by arrows into the Press, introduced. The movement through the press is effected by means of rollers 4 and 5. When the upper, movable pressing element 3 is against the lower, stationary Prüß table 2 by the action of magnets 8 and 9, the latter by the fact that the magnets each hold an armature 10 or 20 respectively By pulling on the movable pressing element, rollers 4 and 5 are simultaneously subjected to pressure, whereby they, due to their The angled veneer panels passing between them forcefully against each other. Specifically, edge against edge, pressing. The more forcefully the movable pressing element 3 is pressed against the pressing table 2, the greater the Lateral pressure on the veneer panels. Above the electrodes 7, where the panels are held in the required position by the contact rollers 13. The adhesive, applied in a suitable manner, preferably shortly before the electrodes, then hardens. The hardening process is carried out by the adhesive. The required heat is supplied by a high-frequency source via electrode 2n 7. The supplied heat should be sufficient to ensure that the glue... The material has hardened after passing through the electrodes. The assembled material then leaves the press. right side, as shown in Fil-- 3.

[0013] It is self-evident that a number of modifications within the scope of the invention are possible Inventive ideas can be developed.

Claims

[0014] PATENT CLAIMS:

1. Device for pressing together objects to be glued or welded, e.g. especially for edge-to-edge joining of thin, disc-shaped panels, for example veneers, using mutually movable Pressing elements, characterized by one or more magnets, preferably electromagnets (8, 9), which actuate the pressing elements (:2, 3) pull against each other, whereby special actuating elements (4, 5) cooperating with the objects for the simultaneous The objects are provided for pressing against each other in a lateral direction.

2. Device according to claim 1, characterized in that... all the or the magnets are arranged in a press which, in a manner known per se, has a lower, stationary and an upper, movable pressing element (2 or 3 respectively). 3) has, between which the items to be joined are inserted.

3. Device according to claim 2, characterized in that ",2-t' c#, that the stationary pressing element (-» is provided with one or more magnets, preferably electromagnets (8, 9), which are arranged in such a way that that they act on one or more magnetically controllable armatures (io, I i) mounted on the movable pressing element (3).

4. Device according to claim i, characterized in that the driven rollers (4, 5) are arranged in frames such that they are positioned under the The tensile force exerted by the magnet(s) on the frame causes mutual pressure on the plates to be joined.

5. Device according to claim 4, characterized in that the rollers (4 and 5) are arranged such that they support the plates to be joined move through the device.

6. Device according to claims 4 and 5, characterized in that the rollers (4, 5) are arranged in pairs. and are positioned at such an angle that in each pair the axes of the rollers, viewed in plan view, form an angle both with each other and with the The main feed direction of the plates through the device is formed.

7. Device according to claims 2 to 6, characterized in that the The upper, movable pressing element (3) is designed as a carriage equipped with bearing rollers (13) which serve to move the press during the progressive process. The plates are joined together in a position over a number of high-frequency electrodes (7) attached to the stationary pressing element (2) for the purpose of to maintain the hardening of the adhesive used for joining.

8. Device according to claim 7, characterized in that the pressure the bearing rollers ZD (13) against the plates by means of adjusting screws (16) provided in the movable pressing element, acting on the carriage It is adjustable.