FI83251B - Method for joining objects with tongues - Google Patents

Description

1 83251

Method of connecting porcelain pieces

The invention relates to a method for joining 5-piece pieces according to the preamble of claim 1, wherein the pieces are permanently joined to each other by gluing from the tongue.

The most common way to glue tongue-and-groove pieces (such as hardwood floors) to a finished floor, on-site furniture, other building boards, etc., at the installation site is to apply an adhesive bottle to the extruded female tongue, after which the pieces are firmly pressed together. When the adhesive dries or hardens, the joint can withstand 15 loads. The adhesives can be of any suitable type, but are generally water-borne polyvinyl acetate adhesives. Other adhesives can also be used in special situations, such as urea or phenolic resin adhesives, etc., if the application requires, for example, water resistance.

20 The disadvantage of this conventional method is that it is difficult to apply the adhesive evenly and to obtain the correct amount of adhesive and thus requires professional skills. This is especially the case when, for example, the purchaser of the parquet 25 carries out the installation work himself, in which case the joint may become poor or too much glue may stain the end result. If, on the other hand, the installation work is done by a professional, a noteworthy factor is the proportion of working time required for the application of the adhesive, which is of the order of 15-30%. If an additional hardener is required, this results in an additional work step, in addition to which the shelf life and service life of the premixed adhesive are short. In this case, the amount to be mixed - must also be estimated quite accurately in order to avoid unnecessary losses or mixing of a new batch, which is difficult due to the inaccuracy of the above application rates.

In the carpentry industry, for example, wooden pins are used to make the joint of furniture pins, the so-called drill pins in which 2 83251 the "glue-bead" described in FI-841067 is used, i.e. wood glue packed in a small plastic capsule. Lii pearls are delivered in bulk. In connection with the assembly work, an adhesive bead is placed at the bottom of each hole 5 in the pieces to be connected, which must be in the correct position.

The drill pin is then inserted into the holes. Both ends of the drill pin are sharp and in addition the pins have a longitudinal hole starting next to the tip and a transverse hole hitting the longitudinal hole at a short distance. The holes form 10 thus form a ductwork. When the pieces to be joined now are pressed together, the sharp tip of the pin breaks the adhesive bead and the adhesive spreads along the above-mentioned channels to the joint. Such a method, for example, would not speed up the installation of the parquet at all, since the placement of such adhesive beads would take longer than the application of the adhesive by the traditional method. In addition, the pontoon article does not have sharp tips that would break the capsule, and even if such were arranged, the pontoon article cannot be aligned as required so that the sharp tips always hit the adhesive beads.

20

FI-44655 describes miniature adhesive capsules and their crushing for gluing, but in which micro-sized capsules are attached to the target surface with a binder, i.e. they are glued to a substrate. Such a capsule and attachment head 25 would be too expensive and cumbersome for parquet boards.

GB-1 289 550 describes a method based on the extrusion of an adhesive impregnated with a foam or the like by the compression of a part to be installed, after which the adhesive is allowed to cure while the compressed foam forms a flexible substrate. The method of the reference publication would not work in connection with gluing parquet boards, because the anti-compression force of the foam is able to push the parts of the joint joint apart when the glue is wet, thus not producing a good joint. Also, the processing of foam containing wet glue as a strip a few millimeters wide is more laborious than the traditional application of glue from a bottle, and the parquet board can not be fc 7 9 ς 1

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such tape should be placed as the adhesive would dry out or spoil before use.

The object of the invention is to provide such a gluing-5 method for joining tongue-and-groove pieces, in which no glue treatment is required during the installation phase of the pieces, and in which the tongue-and-groove pieces can be joined in any longitudinal position with respect to each other. To achieve this and to provide a substantial improvement over the above drawbacks, the method according to the invention is characterized by what is set forth in the characterizing part of claim 1.

The most essential advantages of the invention are that there is no need for any adhesive treatment during the installation phase of the joint, which saves installation time and that there is always a suitable amount of adhesive in the joint, regardless of the skill of the maker, while all other advantageous properties of the joint remain unchanged.

In addition, the installation work can be interrupted at any time and at any time and can then be resumed at a desired time so that no glue is wasted and no further action is required to continue the work.

: - 25

In the following, the method will be described in more detail with reference to the accompanying drawings.

Fig. 1 shows an embodiment of the method of the invention 30 in storage, Fig. 2 shows a detail of the embodiment according to Fig. 1, Fig. 3 shows another embodiment of the method of the invention in storage. . Fig. 4 shows the operation of the method of the invention in a cross-sectional view when mounting pontoon pieces to each other in steps I-III.

4 83251

Figure 1 shows a pontoon parquet board 1 consisting of a surface lacquer layer 3 provided with lacquer 2 and an intermediate louver layer 4 and a base layer 5. The parquet board is shown on the female tongue side and shows glue capsules 7 spaced at a suitable distance S from each other. Figure 2 shows an adhesive capsule 7 placed in the tongue groove 6, which shows this embodiment of the method in more detail. The adhesive capsule 7 consists of an adhesive 8 placed inside the protective housing or shell 9. The capsule is dimensioned so that when pressed into the pontoon groove 6 it has to give way, so that it is firmly pressed between the opposite walls of the pontoon groove 6 so that it remains during stationary at the bottom of the pontoon groove. In this case, the adhesive capsules 15 are separated from each other and can be fed into the tongue groove 6 in the product production line mechanically or with compressed air from cassettes which are filled, for example, using vibration technology.

Figure 3 shows another adhesive capsule arrangement according to the invention, in which the capsules are spaced apart in the bottom strip 11. In this case, the capsules 7 are formed e.g. by deep-drawing the plastic film 10 into a capsule shape, filling them with adhesive 8 and sealing their edges 15 to the bottom strip 11. and presses the product on the production line directly as a strip into the tongue groove 6, whereby the adhesive capsule remains at the bottom of the groove, for example by pressing at the bottom strip 11 or the sides of the capsule between opposite walls of the tongue groove 6. The bottom strip on the distance S between the capsules is preferably perforated or otherwise liquid-permeable, so that the adhesive also spreads to the bottom of the tongue groove to obtain a strong connection.

- 35 Figure 4 shows the gluing operation in steps. In stage I

being in the direction P just brought by the male tongue 12 of the adjacent parquet board 13 to the female tongue 6 with the glue capsules 7. In step II the glue capsule 7 is pressed so hard against the tongue walls that it breaks and the glue 8 is released , in which the adhesive fills the seam 14 between the parquet boards 1 and 13. The adhesive is spread 5 in this way very well and over a wide area in the tongue groove 6, because when the capsule breaks it "fires" the adhesive 8 from the capsule ends. In this case, no bores and ductwork are required in the pieces to be connected, such as when piercing the capsules with a sharp tip. The position of the capsule at the bottom of the tongue groove 10 is also irrelevant. The thickness and hardness of the capsule shell 9 or 10 determine the intensity of the breakage and the above spreading ("firing") and can be designed to suit each application.

15 When the adhesive is a polyvinyl acetate adhesive or the like, an adhesive joint is formed as described above. If, on the other hand, there is a need to use an adhesive requiring a hardener, for example, the actual adhesive in capsules is placed at the bottom of the tongue groove 6, as above, but in addition a hardener is applied to the surface of the male tongue 12. Now that the Pont joint is assembled as shown in Fig. 4 and described above, the adhesive hardens under the action of the hardener. It is, of course, possible to carry out the reverse order in which the hardener is in the capsules and in the tongue groove 6 and the glue is brushed 25 into the male tongue 12 and dry. It is known that such e.g.

there is no glue suitable for gluing parquet or just any other similar use, both components of which should be allowed to dry out, so capsules for the liquid ingredient are always needed.

30

The main dimensions of the capsules, the dimensions of the plastic shell and the placement distance S of the capsules in the tongue groove can be made depending on the type of connection. In the case of parquet boards, the ____ capsule is typically about 5 mm thick and about 25 mm long and - · 35 their placement distance in the tongue groove is of the order of 40-60 mm. The material of the capsule shell must be chosen so as to withstand and protect the adhesive used, withstand placement in the groove, remain in the groove and also withstand storage conditions. The good adhesion of the capsule material itself to the respective adhesive may advantageously affect the strength of the joint.

5 When the capsules are placed in the tongue groove already during the manufacture of the tongue-and-groove part, the additional investment and work step required by it is insignificant, considerable simplification and acceleration of the tongue-and-groove installation work is achieved. There is also no loss of glue, whatever the type of glue, because only the finally installed part activates exactly the required amount of glue in a glue-specific way.

15 Although the method described here is precisely applicable to a production line for pontoon pieces, in which case the capsules can be installed in connection with other stages, the method can also be applied to manual work afterwards. For this purpose, 20 adhesive capsule strips are best suited, from which the user cuts a piece of suitable length and presses it into the tongue groove.

Although a parquet board has been used as an example above, the method is equally applicable to any 25-joint or grooved joint.

Claims (6)

7 63251 A method of joining tongue-and-groove parquet boards or the like, in which the pieces are permanently joined together by gluing the tongue so that capsules containing glue or at least one adhesive component are placed inside the female tongue 5 and compressed into the female tongue (6) by compression, wherein the adhesive or adhesive component (8) in the capsules spreads between the female and male tongues, the capsule (7) being formed by a shell (9; 10) resistant to the adhesive or adhesive component and protected from the environment, in which the adhesive or adhesive component is tightly enclosed , characterized in that the capsules (7) are successively attached to the strip (11) 15, that the width of this strip and / or the capsules therein is slightly greater than the distance between the opposite sides of the female tongue (6) so that when the capsule strip is pushed into the female tongue n, it remains in place under compression between the opposite sides of the female tongue, and that the capsules (7) are located in the female tongue at regular intervals. Connection method according to Claim 1, characterized in that the capsule fastening strip (11) forms part of the capsule shell. 25 Connection method according to Claim 1 or 2, characterized in that the capsules (7) are elongate in the direction of the tongue. Connection method according to one of the preceding claims, characterized in that the capsule shells (9; 10) are primarily of uniform thickness. Connection method according to one of the preceding claims, characterized in that the fastening strip (11) of the capsules (7) is permeable to the adhesive at least in the part between the capsules. β 83251 Joining method according to one of the preceding claims, characterized in that when the adhesive is a two-component adhesive, the second adhesive component is placed in the capsules (7) on the female tongue (6) and the second adhesive component 5 is applied to the male tongue (12).