CS196691B1 - Method of cementing cracks with synthetic nutrients - Google Patents

Abstract

The invention relates to a method of sealing cracks with synthetic resins.

Description

CZECHOSLOVAK SOCIALIST REPUBLIC (19) DESCRIPTION OF THE INVENTION 196691 («) (Bl) TO COPYRIGHT CERTIFICATE (51) Int. Cl.3 B 29 C 27/10 O (22) Registered 02 03 77 (21) (PV 1386-77) - • (40) Published 31 07 79 OFFICE PROVIDED AND DISCOVERED (45) Published 15 07 81 (75)

Author of the invention ŠTYRAND JÁN ing., PREŠOV (54) Cracking of cracks by synthetic resins

BACKGROUND OF THE INVENTION The present invention relates to a method for sealing by synthetic resin.

So far known methods of sealing cracks with synthetic resins are carried out such that the surfaces around the cracks are completely degreased and cleaned in all directions. End cracks or all cracks are searched for and drilled. Perpendicular holes are drilled to the surface of the crack to shorten it to a number of short cracks. The holes are provided with threads M8 to M10 mm. Screws are screwed into the threads with the head and the stem, from which the heads are removed to the level of the repaired area and secured against loosening by the wells. The cracks between the bolts widen into a V-shape. Apply a resin to the surface so treated, followed by the insertion and pressing of the reinforcing tape, as well as the application of another layer of resin. In the case of punctures, a zinc mesh is used. The final operation is followed by surface treatment.

Cracks of, for example, the outer walls of the grease boxes and the cylinder blocks of the internal combustion engines are present in different locations. In the case of water-cooled engines, cracks are most commonly found in both the water jacket and the cylinders, both in different locations and causes. The causes of the gearbox cracks are mainly due to broken teeth and other fragments from the parts that push out its undercuts.

Other methods of sealing cracks are that after the necessary cleaning and finishing by crack cracks, sealing of the plate from the soft-sheet metal is followed, or the apertures on the taper and box cones are spun out, the holes in the cup are threaded and the resin is screwed on after application of the resin; thus covering the damaged area. These methods have some drawbacks, for example, when repairing a crack, it is necessary to extend it to a V-shape. The crack is stretched by the threads and screws, resulting in an undesirable engagement in the end portion of the casting. Cracked castings with higher wall thicknesses and small repair spaces, such as bearing housings for fat housings, cannot be repaired at all by existing methods. The methods require the use of resins with considerable adhesion and cohesiveness and temperature resistance. They utilize the properties of polyacrylate anerobic resins. The strength of the connection is always dependent on the multi-layered laminate thickness applied over the damaged area, its flat, which in short spaces can be achieved.

The aforementioned drawbacks are eliminated by the subject of the invention where, after the necessary cleaning of the surface, activation, deburring of the cracks end points and splitting of the cracks into smaller sections by drilled holes, the essence of which is 1 9 H 9 1.

Claims (2)

in it; that the crack is filled with a polyacrylate resin having a viscosity of 15 to 15,000 cP with the aid of compressed air, the excess resin is removed, then the crack splitting openings for smaller sections and openings of the end cracks are filled with a polyacrylate resin having a viscosity of 1000 to 1. 10e cP, the polyacrylate resins are cured. The polyacrylate resins may be provided with fillers, laminating agents, pins, and wires. The method of crack curing by synthetic resins makes it possible to repair castings, cast castings made of cast iron and non-weldable cold alloys as well as plastics. The use of the method is not limited to the wall thickness. The method can also be performed in abnormally coarse castings. Almost in all cases, the repair of cracks allows intermediate holes and threaded holes. They pull cracks, pins, resin pins and wire-like joints to reinforce and stress, the force transfer takes place through the bolts of higher strength and the untouched, "healthy" material. Tightness of the crack is ensured by interlocking and compressed air-blown polyacrylate resin. The method of bonding cracks with synthetic resins can also be used when applying adhesive sealants. Particular examples of cracksynthetic resin bonding methods are shown in Fig. 1, where the repair of crack 1 ending with through-holes 2, crack-breaking openings 3 into sections is shown. The polyacrylate resin 4, the openings 2 and the openings 3 are filled with polyacrylate resin 5 having a viscosity of 15,000 cP with laminating means in the crack 1 and compressed air. FIG. 2 shows a repair of the crack 1, wherein in the openings 2 and in the openings 3 there are pins 6 in addition to the polyacrylate resin 5, the joint being pinned by pins 7 in the transverse planes on the crack 1 in which the compressed air is pressed poly -acrylate resin 4. A method of bonding cracks with synthetic resin may also be used where other methods have been used and a crack has been recreated. The method can also be applied to compositions other than synthetic polyacrylate resins, e.g., aqueous solutions of alkali silicates, casting cements, and the like. and to trap axial forces. Crack identification is performed and the wall crest is drawn on both sides of the crack of the line at a distance of 9 mm cracking and indicated alternately by holes, using a hole on one side and the other at a spacing of 14 mm. Angles 30 °. Prepared pins 0 2.1 mm from materialSN 13 241.7. Degreasing of the crack and pin is carried out, such as removal of the degreaser and impurities by means of clean compressed air. Activation of the surface is performed to accelerate the polymerization of the polyacrylate resin. The component can be heated to 80 ° C. An anerobic polyacrylate resin having a viscosity of 15 to 15,000 cP is applied, and the viscosity on the crack and drilled holes is determined with respect to the crack width. Press the clean compressed air into the crack. The excess polyacrylate anerobic resins are removed. A polyacrylate resin of viscosity1 is pressed into a 2 mm hole. 104 cP with a steel filler, a suspension form. The pins are plated in a resin suspension and bores 0 2 mm, whereupon they crack early. The resin is allowed to polymerize. This is followed by a functional and surface finish. A similar procedure for repairing cracking by synthetic resins is done by repairing the cracks between the cylinders of a cylinder of combustion engines, which is another specific example of application. OBJECT CLAIMS 1. A method for cracks cracks with cast iron cast resin resins, consisting of surface cleaning, activation, venting of crack end points, and splitting of cracks into smaller sections by drilled holes, characterized in that the crack is filled with a viscous polyacrylate resin using compressed air. 15 to 15,000 cP, excess resin is removed, then the crack splitting openings into smaller sections and cracks are filled with polyacrylate resins having a viscosity of 1000 to 1. 10e cP, the polyacrylate resins are cured. 2. A method for sealing cracks by synthetic fibers according to claim 1, characterized in that the polyacrylate resins can be provided with fillers, laminating agents, pins and wires.