As the size of the wind power industry gradually increases, the requirements for the strength and rigidity of the mold during molding are correspondingly higher, and the cost will increase significantly. In order to reduce the weight of the mold and reduce costs, the molds of large composite blades have gradually changed from early metal Towards a composite mold.
The current large-scale wind power blades are all composite materials, which is commonly known as FRP. The main materials include resin and glass fiber. The resin is divided into epoxy resin and polyester resin. Glass fiber generally has more E-glass, which means that The blade can be made larger and longer. At the same time, because the mold and the blade use the same material, the thermal expansion coefficient is basically the same, which makes the accuracy and dimensional stability of the manufactured product better than that of the metal mold. The molding process has become the mainstream process in manufacturing.
In the past, most of the mold temperature control was heated by electric wire. The disadvantage is that the mold is not heated uniformly. If it is burned, it is difficult to check the group of problems, which will greatly affect the production progress.
Because the overall shape of the mold is generally large, there are many combined surfaces. In this way, if electric heating is used, the temperature collection point will be more, resulting in complicated temperature control and delayed response. It is easy to cause local overheating or burnout in actual production; therefore, for For FRP large molds, it is recommended to use water or heat-conducting oil for heating, and compared with electric heating, water heating is safer. The step temperature control of the mold can be realized according to the process requirements of the wind power blade, and the thermal insulation solves the uneven temperature control situation of the electric heating. The water heating realization form of Klod Seiki can be realized by the mold temperature machine.
According to experience, the selection of the water cycle mold temperature machine is roughly:
First, the upper and lower molds for blades below 50 meters each have a capacity of 72 kW, and the beam web is a 36 kW water temperature machine .
2. For the 50-60 meter mold, choose one 90 kW for the upper and lower molds, and 72 kW for the beam web.
3. Above 60 meters need to be calculated according to the mold length, for reference only.
The water circulation mold temperature machine of Cloud Machinery can display the dynamic flow of the heating and cooling system in real time, and is used for the display and adjustment of technical parameters such as equipment temperature and time. It displays the main technical parameters and curves, the operating status (including the on and off of each valve body), the help menu, the display of fault information and the formulation of the formula (stepwise control), which is convenient for customers to set and operate.