Rotational molding is also called spin molding, rotary molding, rotary molding, rotary forming, etc., in English Rotational Moulding. There are many kinds of plastic processing methods. In addition to our common injection molding, blow molding, extrusion molding and other processes, rotomolding is also an important processing method for plastic products. Especially in hollow molding, rotomolding has outstanding advantages. . The rotational molding process firstly adds the plastic raw material into the mold as a powder, and then continuously rotates the mold and heats the mold. At this time, the plastic raw material in the mold is gradually and uniformly melt-coated on the cavity under the action of gravity and heat. On the entire surface, the mold is then cooled, and the plastic product after demolding is a rotomoulded product. At present, the foreign rotomolding industry is developing rapidly, and due to various factors, the rotomolding processing industry is developing at a lower speed than other plastic molding processing industries. Recently, with the increasing understanding of the advantages of rotomolding, the rotomolding industry is accelerating in the country.
According to the type of sensor, the Touch Screen is roughly divided into infrared type, resistance type, surface acoustic wave type and Capacitive Touch Screen four kinds. The design of capacitive Touch screen is reasonable, but the problem of image distortion is difficult to be solved.
Capacitive touch screen
The touch screen works by using the body's current induction process. A special transparent metal conductive substance is coated on the surface of the glass. When a conductive object touches the glass, it changes the capacitance of the contact, so as to detect the position of the touch. But touching a non-conductive object with a gloved hand or hand does not respond because of the addition of a more insulating medium.
Capacitive touch screen can sense light and fast touch, anti-scratch, not afraid of dust, water and dirt influence, suitable for harsh environment. However, capacitance varies with temperature, humidity or environmental electric field, so its stability is poor, low resolution and easy to drift.
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