DE1965537C3 - Method for producing an adhesive bond for butted components - Google Patents

Description

The invention relates to a method for producing a gluing device for butted, Prefabricated components in which an elastic support made of foam or the like in the open butt joint for liquid insertable and there solidifying adhesive inserted and then the components with the Butt surfaces are pressed against each other.

Such methods are known (üT-AS 10 14 255). They are easy to manufacture and allow higher loads and can optionally also have a shock-absorbing effect if in the carrier after the adhesive has been pressed on during the connection process again a relief of the carrier is made, so that then unfilled Cavities remain in the foam carrier. This condition results in the known adhesive connection can be derived from the fact that a vacuum suction effect is to be created on the connecting surfaces, which is achieved in that air or glue from the cavities of the carrier when connecting is pushed out and the relief then brings about the vacuum suction. An exact dosage the amount of adhesive is not possible here.

The invention is based on the object of the known connection method with the aim improve that the entire limited by the joint surfaces to be connected gap reliably with the Filled glue and a leakage of substantial amounts of glue at the edge of the gap is avoided.

This object is achieved according to the invention in that the porosity of the elastic carrier is 90% of its Volume is, and that at least 60%, in particular up to 90%, of its capacity with one of the complete filling of the joint volume corresponding amount of an elastic adhesive soaked and when the abutting surfaces are pressed together to up to 10% of its original volume is squeezed.

The support is essential when using this method even when compressed smaller than the gap remaining after the abutment surfaces have been pressed together, since this gap is around the Carrier around is completely filled with the adhesive itself. The procedure once ensures that the entire surface areas to be glued together are wetted with adhesive, which has been consistently achieved so far was only possible by working with a considerable excess of adhesive, and that still from the gaps on the side no adhesive escapes s the exact measurability of the glue quantities a considerable glue saving. Since in the lazy »no If the adhesive remains, it acts like a rubber interlayer as a shock absorber.

In the drawing, the invention is in execution case-ο play depicted It shows

F i g. 1 a schematic representation of two components before gluing, seen from the side,

F 'g. 2 the components after gluing, and

F i g. 3–5 sectional views of test pieces of an adhesive bond.

As shown in FIG. 1, the highly porous foam body 1 soaked with the adhesive is placed between the abutment surfaces 2a and 3a of the components 2 and 3 to be connected to one another. Then the components 2 and 3 are pressed against each other in the direction of the two arrows shown (see Way fills in. The components 2 and 3 are held in this position until the adhesive 4 has hardened. The foam carrier 1, from which almost the entire amount of soaked adhesive 4 has emerged, remains between the abutting surfaces and forms an elastic intermediate layer.

The table below shows the influence of the degree of impregnation on the degree of compression of the adhesive backing to the tensile strength of a .15 adhesive bond.

An elastic foam body with a porosity of 80% is used as the test piece. the one with the abutment surface of the plate 61 according to FIG. 3 made of vinyl chloride resin and with a pair of plates 63 butted against one another, also made of vinyl chloride resin, in the manner described. An adhesive with a specific tensile strength of 170 kg / cm ^{2 was used} as the adhesive.

Fig. 4 gives that designated in the table with a Break pattern (plate 61 broken) and Fig. 5 the mitb designated break pattern (carrier broken) again.

TrJn-
k- Tensile strength kg / cm ²
Fracture condition Share of
press Together 90 % Tensile strength kg / cm ²
Fracture condition 0 45 86
a 100 Tensile strength kg / cm ²
Fracture condition 128
a 103
a 92
a 75 Tensile strength kg / cm ³
Fracture condition 23
b 98
a 83
a 50 2i
b 25th
b 79
a 25th 6th
b 20th
b

The table shows that the proportion of impregnation should not fall below 75%, since then a state of fracture according to FIG. 5 can result. The reason for this is to be found in the circumstance that the adhesive collects in the lower part of the carrier and not numerous pores in the upper part Are filled with glue.

For this purpose I sheet / cicliniingun

Claims (1)

Claim: Process for the production of a gluing device for jointed prefabricated components, in which in the open butt joint an elastic support made of foam or dgL for liquid insertable and The adhesive that solidifies there is inserted and then the components with the impact surfaces are pressed against each other, characterized in that that the porosity of the elastic carrier is 90% of its volume, and that at least 60%, in particular up to 90%, of its absorption capacity with one of the complete Filling the joint volume soaked in an appropriate amount of an elastic adhesive and when Pressing the abutment surfaces together to up to 10% of its original volume will.