Premixing of raw materials

In order to make all kinds of components in the powder coating disperse evenly, in the manufacturing process, the bulk materials are broken to a certain size in advance, and premixed before melting and extrusion The basic devices used in general pre mixing are as follows: [upload = GIF] / crowd / UploadFile / 200482814575167300 GIF [/ upload] Drum mixer: generally, there are cylinder type, cone type, square type, double cylinder type, etc this kind of equipment does not have agitator, the mixing time required is 20-30 minutes, the mixing efficiency is low, time-consuming and electricity-consuming, but it will not form overheating phenomenon, easy to clean, and it is suitable for the post mixing use of fine arts and liberal arts powder coating Mixing type mixer: this type of mixer generally includes mixing type and double cone screw mixing type The mixing time is generally 10-20 minutes Its mixing effect is better than that of drum mixer, without overheating, but it is not easy to clean High speed mixer: the mixing efficiency is high, the general mixing time is 3-5 minutes, and the mixing time of materials should be strictly controlled If the mixing time is too long, the material will overheat (without cooling water), and it is not easy to mix the finished powder coating products (gelation and agglomeration will occur due to overheating) It is the most commonly used equipment for premixing powder coating The premixing equipment of raw materials shall be selected according to the production conditions and the supporting conditions of other equipment, especially the materials It is better to select 10mg / L additive for mixing equipment to disperse to uniform state, and at the same time, it will not make the material overheat, bond or damage the property of the material The high-speed mixer is initially used to mix plastic materials The characteristics of this equipment are that the materials are evenly mixed, the mixing time and cycle are short, the discharging is convenient, and the heat released can be taken away by the cooling equipment In the mixing process, in order to ensure that the materials do not stick or have chemical reaction, the mixer is required to be equipped with jacket cooling device or cooling pipe cooling device At present, many powder manufacturers use high-speed mixer without cooling device [upload=jpg]/powder/UploadFile/20048281459291129.jpg[/upload][upload=jpg]/powder/UploadFile/20048281459813544.jpg[/upload][upload=gif]/powder/UploadFile/200482814591481121.gif[/upload]