Cutting glass tubes. Trimming Glass Tubes of Various Diameters How to Trim Glass Tubes at Home
Hello, dear readers! The decor of glass bottles, quite popular in recent times, by the way, we have considered this topic in a review ” “, and since many are interested in the question of how to cut the glass bottle at home, without the use of glass cutters, then today’s master class I want to devote a simple but interesting way to cut the bottle thread.
In this regard, the theme of this master class “How to cut a bottle with a thread. nothing complicated!”.
- A glass bottle;
- Woolen thread;
- Solvent (you can use kerosene, alcohol, cologne, acetone);
- Scissors or a box cutter;
- Gloves (will keep the skin of the hands from exposure to solvent);
- A lighter or matches;
- To protect your eyes just in case there are no splinters, but you can’t be too careful);
- A deep basin filled with cold water.
So, how to cut the bottle with thread? Take the woolen thread, measure and cut it so it was enough for 3-4 turns of the bottle.
Immerse the measured and cut thread in the solvent, and immediately wrap it around the bottle, in the place where you plan to make the “cut”. The thread can be simply wrapped or tied with a knot, in this master class I made a simple wrapping.
After that this thread will ignite with matches or lighter, and it is better to keep the bottle in a tilted position. strictly horizontal (parallel to the ground), gently scrolling around the axis.
The fire will burn for about 30-40 seconds, as soon as the lighted thread will go out. quickly lower the bottle into the prepared bowl filled with cold water.
Next, the characteristic sound of cracked glass will be heard and the bottle will instantly split in two. This type of glass cutting is based on a rapid change of temperature, we all know from physics lessons that the heating expands the glass, and the cooling narrows, respectively, when the temperature change occurs a kind of destruction of the glass and it simply cracks!
Cutting glass tubes, sticks, bottles, billets and flat glass. one of the most common operations in laboratory and glassblowing. It usually precedes all glassblowing operations. Only properly cut glass tubes are suitable for further processing (splicing, end fusing, soldering of beads, etc.).). The end of a properly cut tube should be strictly perpendicular to its length, without nicks or fibers, as well as short cracks located at a slight angle to the place of the cut. Different cutting methods are used depending on the diameter of the tube or workpiece.
Cutting the tube to a breaking point. This method is used to cut tubes with diameter of 20-23 mm and glass sticks. The glass tube is placed on the edge of the table and the left hand holds the protruding part of the tube. In the simplest case the tube is simply clamped in the left hand. Right hand holds a carbide knife (cutter) or a sharp, fine-toothed file. Putting a cutter or file on the tube in the marked place strictly perpendicular to the length, with the left hand rotate the tube towards yourself about a quarter of the diameter (Fig. 27, а). To decrease the surface tension in the place of the notch, the tube may be moistened with water or soapy water.
The incision may also be made by another method. With the right hand (the tube is clutched in the left hand) put the knife on the tube and with a little pressure from yourself downwards make the notch, then push the knife back upwards without taking it away from the tube and again down towards yourself. This creates an even incision equal to a quarter of the tube diameter. The incision can be made differently by placing one end of the tube on the right knee and pressing the other end with the left hand against the left leg.
Glassblowers often use the following technique to make the notch. Hold the glass tube to be cut with your left hand firmly between your thumb and forefinger. Take a cutter or file in your right hand (fig. 27, б). The pad of the right thumb should rest on the sharp edge of the file. Then the tube is tightly clamped between the sharp edge of the file and the thumb and make a little turn: with the right hand. on itself, and with the left. from yourself making a cut on the surface of the tube.
Be very careful when starting to learn how to cut glass because if you press too hard, the tube, especially a thin-walled one, can break and hurt your hand. After making the mark, the tube is taken in both hands with the mark upwards, so that the mark is at the same distance from the right and left hands, and smoothly, stretching in different directions, the tube is broken (Fig. 27, в). If the tube does not break, make a repeated one on the old mark by one of these methods and break again. The mark-cut should be moistened with water to reduce the surface tension. The tube will break more easily in this process. As students become proficient at cutting the tubes, this should be done with a towel or cloth over their hands to prevent cuts. When cutting, the glass sticks are broken with a sharp movement so that no burrs are formed at the ends.
How to connect the glass tube?
The end of the cut cone of the wide tube is heated in a torch flame while rotating, slightly settling the glass to the diameter of the tube to be soldered. The edges of the tapered cut are then slightly thickened. Then the end of the narrow tube is heated, as mentioned earlier, and soldered to the tapered end of the wide tube
String soaked in gasoline is wrapped around the bottle in the place where you want to make the chipping and set on fire. When the gasoline is almost burned out, the bottle is dipped in cold water, where the temperature difference causes the glass to burst along the heating line.
How to cut a mirror without a glass cutter
The mirrors that surround us: in the car, the bathroom or a woman’s cosmetic bag, are by their structure regular glass with a layer of metal applied to the back surface. Cutting of mirror coated glass is very similar to the usual glass and can be done with a regular glass cutter or by the above mentioned methods. When there is no special tool at hand, the most effective device for cutting will be a file or a diamond disc. Let’s take a closer look at how to cut the mirror at home without a glass cutter, using improvised means.
The first thing to do is to prepare the surface to be cut: wash, degrease and dry. The mirror should be clean, without stains and strong streaks. Otherwise the line for the trimmer can be twisted and the bevel will be uneven. The working surface where the cut will be made, should be flat and not very hard. You can put a thick cloth or a piece of linoleum on the table.
After you’ve prepared the material and the working place, mark the line for the future cut on the mirror. It is better to make straight lines on a ruler or rail with a height of at least 5 mm. To prevent the stop from slipping, you can glue a strip of duct tape to its underside. Then take a file, an angle grinder or other tool and make the cut along the marked line. A more detailed process of the different cutting methods, painted above.
When the cut is ready, it is only necessary to chip the mirror in the right place. For this purpose it is possible to put a small object (a match, a pencil, a nail) under a line for a trimmer of the cut and to press slightly from both sides. You can chip the glass on the edge of the table or gently tap with a small metal object (a drill or a spoon) from below. If the glass does not break, do not press too hard. It is better to make a second cut a couple of centimeters away from the first one.
The above techniques have the right to life and produce a good result with skillful handling of glass. Probably, not having experience in glass works, you will not manage to get an even chipped glass at the first attempt. Before you start processing the base material, we recommend that you first get a feel for unnecessary splinters. If you want to get a good cut without much practice it is better to get a roller or oil glass cutter.
Another way to break off a bottle neck is to use friction to heat the glass. To do this, two plastic ties are put on the bottle to serve as stoppers. Three turns of twine are wound around between them, and then the twine begins to move backward/forward by the loose ends.
After 2-3 minutes, when the glass is sufficiently heated, the bottle is placed in cold water, and with a light tapping occurs chipping along the heating line.
If you make a small notch on the bottle with a glass cutter before rubbing with the wire, you don’t need to use cold water: the glass will crack on its own when heated.
A filament setup
This method requires a transformer, for example, from a microwave oven with the secondary winding removed, instead of which three coils of a powerful power cable are installed.The free ends of the wire are shorted through a thick wire. The base should be heat resistant and dielectric.
The next step is to connect the transformer to the electrical outlet. When you turn on the transformer, the filament will become hot: a bottle is placed against it and gradually rotated. As you heat the glass, the neck will come off along the heating line, so you need to make sure that the heating is even and on the same line.
How to Cut a Glass Bottle with Water and Oil?
Put the water in the basin to the level of the water inside the bottle.Dispense window For the oil in the basin until the surface of the water is covered with oil. Burn the blade until it turns red, then place it in the basin and with a slight sound the bottle is cut successfully!
To drill holes in glass, start by attaching a small piece of tape or cardboard to the glass where you want to drill the hole, which will prevent the drill from slipping. Then insert the diamond drill bit into the drill bit and place it where you want the hole To be in.
Before the cutting, it is worth choosing a tool to cut the glass with. Ideally, the glass cutter is used to cut the sheets. It will do the job just fine, provided the amount of work is small. But if you do not have a glass cutter, you can always find an alternative.
Many people substitute the glass cutter with an angle grinder. Replaced at least because the angle grinder is available in the arsenal of almost every owner. It is important to remember that an angle grinder can be used when you want to make a small length cut.
To cut a piece of glass, you must install a thin diamond disc. Cut only at low speed. Further, the principle of work is as follows:
Cutting glass tubes, sticks, bottles, billets and flat glass is one of the most common operations in laboratory and glassblowing. It precedes all glassblowing in most cases. Only correctly cut the tube is suitable for further processing (soldering of tubes, melting of tube ends, soldering of spurs, etc.).). The cut should be perfectly perpendicular to the material length, without nicks or fibers, and without any short cracks at slight angles to the cut. Depending on the diameter of the tube or workpiece, various cutting methods are used.
Fracture Cut Tubing. This method is used to cut 20-23 mm diameter tubes and glass sticks. lay the glass tube on the edge of the table and hold the projecting part with the left hand. In the simplest case the tube is simply clamped in the left hand. In the right hand they take a carbide knife (cutter) or a sharp file with a fine notch. Putting the cutter or file on the tube in the marked place strictly perpendicular to the length, with the left hand rotate the tube towards yourself by about a quarter of the diameter (Fig. 27, а). Moisten the tube with water or soapy water to decrease surface tension in the notched area.
Another method of notching is also possible. With the right hand (the tube is clutched in the left hand) put the knife on the tube and make the notch with a little downward pressure, then push the knife back up without taking it away from the tube and again down toward yourself. This makes a straight cut equal to a quarter of the diameter of the tube. The cut can be made in another way, by putting one end of the tube on your right knee and pressing the other end with your left hand to your left leg.
Those who are new to glass cutting should be very careful with this method because the tube, especially a thin-walled one, can break and hurt your hand if pressed hard. After marking, the tube is taken in both hands with the mark; upwards, so that the mark is at the same distance from the right and left hands, and smoothly, stretching in different directions, the tube is broken (Fig. 27, в). If the tube does not break, make a repeated one on the old mark with one of the above methods and break again. To reduce the surface tension the mark-cut should be moistened with water. The tube, in doing so, breaks more easily. While the students are getting some skill in cutting the tubes, this operation should be done with a towel or cloth wrapped around their hands to avoid cuts. When cutting glass sticks, break them with a sharp motion so that no burrs form on the ends.
If it is necessary to cut the tube near its end, use the following technique. Make a deep notch in the tube with a cutter and place the tube on the edge of a metal prism or on the edge of a triangular file with the mark up. Care must be taken to ensure that the scratch applied to the glass is exactly against the sharp edge of the prism. Then a light tap with a knife or file on the short end makes the cut.
Glass sticks can be cut in the same way, putting the stick with the short end on the corner of the table.