Rabitz netting machine
|Rabitz netting machine|
A fence made of metal mesh is better than any wooden fence. And it lasts longer, and does not obscure the plants. Pillars for its installation can be any: steel or asbestos cement, reinforced concrete or, at worst, wooden. However, reinforced concrete poles are not difficult to manufacture by themselves. The form for them is an asbestos cement pipe. And that the concrete does not stick to the walls, from the inside it is oiled. In concrete, it is necessary in advance to make holes for the installation of anchor bolts and fixing the wire. After all, when the concrete hardens, hollowing them out will be very difficult.
And now we will proceed to the most troublesome business - the manufacture of wire mesh. The most common sizes of cells are 80х80, 60х60 and 45х45 mm.
Figure 1 shows the device of a simple device that will make it easier for us to work.
It is designed for a cell 80x80 mm. Wire, so as not to be confused, concentric circles are thrown on the feeding drum - an inverted bucket, put on a wide board. The position of the bucket is fixed with a load. From the drum, the wire is fed to a section of the steel channel, on which are installed three rollers. Changing the position of the central of them, adjust the tension of the wire. And that the rollers are easier to rotate, the bolts that serve as axles, on both sides, are fitted with 1-1.5 mm thick washers.
The wire prepared for braiding is wiped with a cloth moistened with machine oil, and sent to a bending machine mounted on a flat steel plate. The length of the plate corresponds to the height of the grid. It is attached to a solid working table.
The machine itself (Figure 1) is a thick-walled steel pipe in which a knife of solid strip steel rotates. In the pipe, a 4-5 mm spiral groove is cut at an angle of 45 degrees to the axis. At a distance of 5 ohms from the edge of the pipe, the groove ends with a round hole. The tube is welded to the steel corner so that the welding does not close the groove. A corner is attached to the base. Correct installation of the support is controlled by washers. The knife in the groove of the shaft is fixed with a screw or a stud.
In Figure 1, the numbers indicate: 1 - a knife; 2 - support; 3-shaft; 4 - pipe; 5 - base; 6 - corner.
The shaft should rotate freely, and the gap between the walls of the pipe and the knife is 0.5-1 m. The working table is positioned so that an angled wire comes up on the receiving drum. This may be a rack to which a wooden shaft or a pole is attached (Figure 2).
The operation of weaving is performed in such a sequence. The end of the wire is bent in the form of a hook for half the length of the cell, the wire is drawn through the groove of the tube and attached to the edge of the knife. Then rotate the handle until the wire becomes wavy. The wave-like workpiece that emerged from the machine is cut into lengths equal to the height of the fence plus half the height of the cell, and weave it on the working table.
The finished mesh is wound on the shaft of the receiving drum. The most suitable material for netting is a soft wire with a diameter of 2.2 mm. Note that from a 1.45 m piece of flat wire, 1 m is wavy. So, for the manufacture of a grid with a cell 80x80 mm, a coil of wire of 36.35 m long (25 segments of 1 m) will be required.
Before stretching the grid, dock the individual pieces together (Figure 3).
The easiest way to do this is by removing the end wire. Attaching the ends of pieces to each other, connect them with the wire taken out. No trace will be noticeable. There is another way: the ends are connected by a piece of straight wire, threading the cells with them like a spoke (Figure 3). But in either case the wire is better divided into two parts and connect pieces from two sides. After stretching the wire half the width of the grid is much easier.
When the grid is connected, it can be hung to posts. If wooden cross-pieces are mounted on them, the operation is not difficult: the net is slightly stretched and nailed. Unprepared poles require a lot of tension. It is so. Through the outer cells a steel rod is passed. A cable is attached to it, and with it the net is pulled.
Figure 4 shows several devices for this operation. The easiest way is to use the lever - a long sturdy pole, one end of which, so that it does not slip, is lowered into the pit, and the other is pulled by ropes. You can apply a threaded tension clutch or beam, twisting a strong double rope or rope. But you need to have a support, for which you could hook a ray or a coupling: a tree, a pole or a wall of a building.
And the most simple is to dig a log into the ground.
To the posts the grid is fixed with wire or bolts with a large diameter washer. The last fastening, of course, is more reliable and accurate. The painting ends. It is more convenient to work together, standing on either side of the hedge. Everyone paints their side, helping a friend paint over the weave - the most inaccessible places. Use a better brush, the paint roller interlacing does not paint. And here do not spare the time. After all, on how much the grid is dyed qualitatively, the term of its service depends.
In short, conscientious work pays off with interest.