Roll Forming Machines According to the production process of plastic products, plastic machinery can be divided into plastic compounding machinery, plastic molding machinery, plastic secondary processing machinery and plastic processing auxiliary machinery or equipment and other four categories. Plastic compounding machines are used in the manufacture of various forms of plastic compounds, including kneaders, presses (refiners and mixers), pellets, screening machines, crushers and grinders. Plastic molding machinery, also known as plastic processing machinery for plastic semi-finished products or products molding, including compression molding machines, injection molding machines, extruders, blow molding machines, calendering machines, rolling presses, foam machines.
Plastic secondary processing machinery for plastic semi-finished products or products re-processing and post-processing, including hot forming machine, welding machine, heat sealing machine, hot stamping machine, vacuum evaporation machine, flocking machine, printing press. in
Metalworking machines are also commonly used in secondary processing of plastics. Plastic processing auxiliary machinery or equipment to achieve the rationalization of the plastic processing process, including automatic measurement of feeding device, automatic recovery of scrap equipment,Roll Forming Machines injection products automatically remove the device, injection mold rapid replacement device, injection mold cooling machine, automatic thickness measurement device and raw materials Transportation and storage equipment. This type of auxiliary machinery or device has become an indispensable part of the automation of modern plastics processing.
The degree of perfection of plastic machinery directly affects the quality, production and cost of plastic semi-finished products or products, and must be able to adapt to the changes in temperature and stress of plastic compounding and processing, as well as the resulting changes in the properties of molten materials and to chemical corrosion And mechanical wear and other special conditions. Plastic grade specialization, the development of engineering plastics, the emergence of composite materials, plastic product structure large-scale, lightweight and thin-walled technology development requirements of plastic machinery to achieve: for the purpose of production products and packages; high-speed, effort, automation , To improve product production efficiency; to ensure that the product specifications and quality of the smallest precision of the precision; low energy consumption, small footprint, easy operation and maintenance and safety.
Film blown film production is suitable for a variety of high-grade film packaging. This film because of its good barrier, fresh, moisture, frost, oxygen, oil, can be widely used in light and heavy packaging. Such as all kinds of fresh fruit, meat food, pickles, fresh milk, liquid beverages, medical supplies and so on.
In the plastic machinery, the calender is usually used as a guide device such as material conveying, sieving, metering, kneading and mastication, such as lead, pull, embossing, cooling, thickness measurement, coiling, truncation and other followers, as well as transmission, monitoring and heating Equipment and other components to complete a complete rolling production lines, the production of soft and hard film, sheet, leather, wallpaper and flooring and other products. Plastic Plastic Online Encyclopedia
There are many types of calendering machine in plastic machinery, and the number of pressing rollers is divided into two rollers, three rollers, four rollers and five rollers. Press roller arrangement can be divided into F, Z, S and L type.
According to the specifications of the calender,Roll Forming Machines the thickness of the soft polyvinyl chloride film is different, ranging from 50 ~ 1000m, the minimum thickness of the hard polyvinyl chloride film is 60m.
Full name closed plastic molding machine. Is one of the main equipment for plastic compounding. According to the working principle can be divided into two types of intermittent and continuous. The main structural parameters of the mixer are rotor speed, diameter, length and total capacity of the mixer. Figure 1 shows the structure of an oval-type intermittent mixer. It consists of mixing chamber, rotor, top bolt (pressing device), the next bolt (discharge device), heating and cooling devices and transmission systems and other components. Its working principle is: the mixture from the hopper into the chamber, in the two relatively rotating rotor gap,Roll Forming Machines the rotor and the mixing chamber wall gap, the rotor and the upper and lower bolt gap, subject to changing shear, pinch Refining and friction, so that plastic heat and plastic, and mixed evenly. Intermittent mixer has become standardized and serialized. Commercial mortar by the total capacity of 4,25,50,75,150,250,380 l and other specifications. As the intermittent mixer is not suitable for continuous production, 60 years developed a continuous mixer. More commonly used are rotor-type continuous mixer and twin-screw mixer. There are many types of twin screw kneaders. Generally have the material to force the transmission capacity, mixing function, the material in the twin-screw in the residence time is short, and the twin-screw self-cleaning performance, and timely elimination of materials, reduce material degradation phenomenon, so the increasingly popular application.