How to Bend Acrylic Correctly
Bend acrylic in the right way:
1, there are three or four new wallpaper blades, neatly stacked together, and the bottom is wrapped with tape, which must be aligned neatly;
2. Then draw the part you want to bend with the tip on the back of the wallpaper cutter (the cutter on the back of each cutter has a small pocket). Be sure to apply force evenly, and use a ruler to draw it to1/2-1/3 of the thickness of the acrylic board;
3. After the groove is painted, blow it with a hair dryer (change the limelight and concentrate the wind), or bake it with a wax head. Don't burn it. And then a discount, it's over. Because of the blade, the bend is straight.
Acrylic has good transparency, chemical stability and weather resistance, easy dyeing, easy processing and beautiful appearance, and is widely used in construction industry, furniture products and sanitary ware.
Acrylic bending, also known as acrylic hot pressing, takes advantage of the thermoplastic characteristics of acrylic, heats to a certain temperature, and then undergoes plastic deformation after softening.
Acrylic has low heat resistance, so it can be bent as long as it is heated to a certain temperature. The maximum continuous service temperature of acrylic fiber varies from 65℃ to 95℃ under different working conditions. The thermal deformation temperature is about 96℃( 1. 18MPa), and the Vicat softening temperature is about 1 13℃.
There are generally two kinds of acrylic heating equipment: one is industrial heating wire, and the other is kitchen oven. The heating wire can heat the acrylic board along a straight line (aligned with the straight line). Place the acrylic board to be bent above the heating wire. After the heating position reaches the softening point of 96, it will bend along this heating and softening straight line. After bending, acrylic acid will take about 20 seconds to cool and set. If rapid cooling is needed, it can be sprayed with cold air or cold water (never spray white oil or alcohol, otherwise acrylic will explode). The other is heating and bending in an oven to change the curved surface of acrylic flat plate (curved surface). Firstly, put the acrylic plate into the oven and heat it in the oven for a period of time to reach the softening temperature of acrylic 96. Take out the softened whole acrylic and put it on the pre-made female mold, and then press it with the male mold. After cooling for about 30 seconds, the mold can be released, and the deformed acrylic board can be taken out to complete the whole baking and bending process.
Acrylic is brittle and can't be cold-rolled and bent, but it will break when cold-rolled and can only be heated and bent. Pay attention to control the heating temperature when heating and bending. If the heating temperature does not reach the softening point, the acrylic plate will often break. However, if the heating time of acrylic is too long and the temperature is too high, acrylic will foam (if the temperature is too high, the material will change, the inside will start to melt, and the external air will enter the inside of the plate), and the foamed acrylic will greatly affect the appearance. If the foaming is serious, the whole product will be scrapped. Therefore, the bending process is generally completed by skilled workers.
In addition, the bending of acrylic is related to the material of the plate. Casting acrylic is difficult to bend, and extruding acrylic is easy to bend. Compared with the casting plate, the extruded plate has lower molecular weight and slightly weaker mechanical properties, which is beneficial to bending and thermoforming, and is beneficial to rapid vacuum suction forming when dealing with large-size plates.
Acrylic bending is an essential process in acrylic processing and production. As a manufacturer, we should comprehensively consider which material to choose and control the heating temperature according to the specific requirements of the product, so as to produce non-foaming, standard-sized acrylic products!
Although many storage parts are based on acrylic, in some factories, they are only acrylic plates, which are large-area smooth plate products. Therefore, additional processing is needed in the later stage to make acrylic shelves or boxes with storage capacity. Today, what we reveal is the information of acrylic bending, which plays a key role in the industrial process, including the operation suggestions of the bending machine and the technical steps of acrylic bending.
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