Operation of inflatable watercraft is often associated with high mechanical loads, especially in the zone of attachment of the power element. transom board The engine takes over the main thrust, so its reliable fixation is critical to the safety of the crew, and over time or as a result of careless use, the factory connection may weaken, requiring immediate intervention by the owner.
The process of restoration of fastening is quite possible to implement at home, if you strictly follow the technology of working with polyvinyl chloride. two-component This can cause the motor to break off on water, with serious consequences, and in this article we will discuss in detail each step of restoring tightness and strength of the unit.
Diagnostics of the condition of the fastening unit
Before the action begins, a thorough examination of the connection between the cylinder and the insert element is necessary. Often the problem lies not only in the detachment of the tissue, but also in the deformation of the plywood or aluminum insert itself. sink-board stratified from water, its replacement is mandatory, since gluing a new fabric on a rotten tree is pointless.
Look at the angle of separation: if the PVC fabric has broken along the seam or has gone rags, you will need to pattern a new repair patch of larger size. In cases where only the strip of material holding the board has broken off, the situation is solved easier. It is important to assess the condition of the cylinder at the site of the sticking - the presence of microcracks or fatigue of the material may require strengthening the structure.
β οΈ Attention: If deep scratches or thinning of the material in the attachment zone are visible on the surface of the cylinder, a reinforcement patch must be installed before gluing the new layer to redistribute the load.
Check the integrity of the slings or the extra straps if they are designed by your boat model. Sometimes they take on some of the load, and their break creates the illusion of a glue seam problem. transom-angle not broken, otherwise, when installing the engine, a distortion will occur, leading to the rapid destruction of the new seam.
Selection of materials and tools for repair
The quality of the result depends on the chemistry used. For PVC products, water-based universal adhesives or cyanacrylate compounds ("superglues") that make the material brittle are categorically not suitable. polyurethaneIt's a hardener that creates a flexible, strong, fracture-proof compound.
In addition to adhesives, you will need a solvent to degrease surfaces. The best choice is acetone or a special PVC cleaner that does not leave a greasy film. Also prepare a set of abrasive materials: sandpaper with grains from P120 to P240 or special abrasive sponges for stripping glossy layers.
To fix the parts during drying, you need loads, rods or sandbags. It is not superfluous to purchase a dryer to heat the glue, since many professional formulations require temperature activation to achieve maximum adhesion. five-layerMake sure that its density matches the main material of the boat.
- π οΈ Specialized two-component adhesive for PVC (e.g. Texacol, Kleyberg or analogue).
- π§ͺ Solvent (acetone, toluene or branded cleaner).
- π Sandpaper, scissors, marker and line for marking.
- π‘οΈ Temperature-adjusted building dryer (optional, but desirable).
Surface Preparation: A Key Stage
The most common cause of re-separation is poor-quality preparation of the glued surfaces. Dirt, fat, oxides and old glue create a barrier that prevents the new composition from penetrating the polymer structure, and first, you need to mechanically clean the place of future connection on the cylinder and on the transom reciprocating part.
Use sandpaper to remove the top glossy layer of PVC before matteness appears. The movements must be progressive, without strong pressure, so as not to damage the cloth cords. The stripping area should be 2-3 centimeters larger than the area of the part to be glued to ensure reliable overhang.
After machining, the surfaces are thoroughly degreased, moisten the rags with solvent and wipe the cleaned areas, removing dust and fat spots, and let the solvent completely evaporate before applying the glue, otherwise bubbles form inside the seam, which reduce the strength.
Use lilaless wipes for degreasing, so that the pile from the fabric does not fall into the glue seam and does not violate the tightness of the connection.
If the squirrel board has any residues of old glue, you need to gently cut them with a scalpel or clean them with a rough skin, the surface of the wooden insert must also be clean and dry, the humidity of the wood should not exceed 10-12%, otherwise the operation will start rotting under the cloth layer.
Technology of applying glue and gluing
The gluing process requires care and adherence to the time intervals specified by the chemical manufacturer. Mix the components of the glue in a strict proportion if a two-component composition is used. Apply the first thin layer on both glued surfaces (the cylinder and the transom) and let it dry to "lip" - usually this takes 15-20 minutes.
Once the first layer is dry, a second, thicker layer of glue is applied, at which point it is important to prevent dust or moisture from entering the sticky surface. If the instructions to the glue require activation, warm the applied layer with a hair dryer to a temperature of 50-60 degrees Celsius, which will trigger a chemical reaction and increase adhesion.
You need to connect the parts quickly and accurately, because once you press them, you can't move them without breaking the seam. You need to press the transom tightly against the cylinder, pushing the air from the fabric from the center to the edges. Use a hard roller or a smooth tool handle to carefully roll the seam.
βοΈ Checklist of gluing
To ensure uniform pressure throughout the seam, it is recommended to install an improvised press, which can be sandbags stacked around the gluing site, or carefully stretched harnesses, the main thing is to avoid skewing the transomboard during the freezing process.
Polymerization time and quality control
Complete polymerization of the adhesive takes 24 to 72 hours, depending on ambient temperature and humidity. Don't try to speed this process up with artificial heating immediately after gluing, this can lead to boiling of the composition and formation of pores. The optimal temperature for drying is 20-25 degrees Celsius.
On the first day, it is best not to touch the boat and leave it straightened. If possible, leave it in a slightly inflated form so that the fabric is in working tension, but do not overdo it with pressure. After 24 hours, you can conduct an initial inspection of the seam for bloating or detachment.
| Type of glue | Drying time between layers | Time of complete polymerization | Temperature conditions |
|---|---|---|---|
| single-component | 15-20 minutes | 24 hours. | 15-25Β°C |
| Two-component (with hardener) | 20-30 minutes | 48-72 hours | 20-30Β°C |
| Polyurethane (hot method) | 10-15 minutes | 24 hours. | 50-60Β°C (heating) |
| Special glue for PVC (fast) | 5-10 minutes | 12 hours. | 20-25Β°C |
After drying completely, perform a strength test, carefully trying to bend the edge of the glued fabric (no fanaticism). The seam should be monolithic, without sticky areas. clear-glueIt should not become white or cloudy over time.
β οΈ Warning: The boat with the engine installed is only possible after the glue is completely polymerized, and early access to water can cause the transom under load.
Frequent errors and ways to fix them
One of the common mistakes is to apply glue to a poorly prepared surface, so if the seam has gone away after a week, then the degreasing has been poor or the old layer has been left, and then you have to completely cut the fabric, clean it and glue it again, increasing the area of the patch.
Another problem is the cold seam when using a glue that requires heating, if you haven't warmed the surface or done it at too low a temperature, the adhesion will be weak. When working in a cold garage, use a heat gun to raise the overall temperature in the room.
What to do if the glue is frozen in the jar?
If a two-part glue is mixed with a hardener, it can't be saved -- it will freeze in a few hours. A single-part glue in an open jar can be kept tightly closed, but its lifespan is shortened. Always cook as much of the mixture as you can use at a time.
The wrong adhesive is also a failure, and using rubber or leather adhesive on a PVC boat will only have a temporary effect, and for an outboard motor load, the seam will burst. Always check the tube markings: it should say "PVC" and preferably "boats."
Ignoring the exposure time between layers is a common cause of bubbles. If you apply the second layer too early, the solvent will not have time to evaporate and foam when you heat it up. If you hold it too long, the layers will not catch up with each other. Follow the timing on the package.
Prevention and care of the transnox node
To extend the life of the renovated site, follow the rules of operation. After each fishing, be sure to wash the boat with fresh water, especially in the area of the transom, where dirt and fuel accumulate. Salt water and gasoline aggressively affect the glue seam.
When you install the engine, make sure that the lower unit does not hit the soft parts of the cylinder. Use the transom wheels or stands when storing the boat assembled to relieve the load from the mount. Regularly check the state of the seam for microcracks.
Regular washing of the transmutation unit with fresh water and storing the boat in a case significantly prolong the service life of the adhesive joint.
Keep the boat in a dry, ventilated room at a temperature not lower than -10 Β° C and not higher than +40 Β° C. Sharp temperature changes and ultraviolet radiation destroy the structure of PVC and glue. If the boat winters in the garage, it is advisable to periodically (once a month) slightly change the position of the transom board, so that there is no constant static pressure on one seam point.
Can I put a squirrel in the cold?
It is strongly discouraged. At low temperatures, the glue loses its properties, becomes viscous and does not penetrate the pores of the material. The optimal temperature for work is above + 15 Β° C. If repair is urgent, organize a warm box or use a heat gun to warm up the repair area.
How to replace a special glue for PVC?
There is no replacement. Moment, epoxy or sealants will not provide the necessary elasticity and strength to break away. The only option is to look for specialized compounds in auto or construction stores labeled as polyurethane adhesives for PVC.
How much dried PVC boat glue?
Primary grip occurs in 1-2 hours, but the full strength of the seams is gained in 24-72 hours, the exact time depends on the brand of glue, air temperature and thickness of the layer applied.
Do I need to remove the old fabric completely?
If the old fabric is held tightly at the edges, you can not cut it completely, but clean and glue the new one over or paste, but if it moves away, it is better to remove it completely so that the new patch will fall on the flat surface of the balloon.