The heating method before the hot platen is mostly the heating method directly inserted into the heating tube, so that the direct heat transfer method does not have many advantages, the first heat transfer is uneven, and the second is that the temperature control accuracy cannot be achieved in many cases.
In the early stage of the hot platen from room temperature cooling to the temperature required by the process, we should take into account the heat loss of the hot pressing plate in the heating process, and the heat absorbed by the material during hot pressing, the heat loss plus the energy required for heat absorption of the hot plate itself, and whether the heating power meets the actual working process.
In the actual process, many times because the hot pressing process basically needs to heat two and more than two hot plates at the same time, and it is necessary to consider whether the actual working temperature of the upper and lower hot plates needs to be temperature difference, the hot pressing plate forming mold temperature machine can choose a plate with multiple plates at the same temperature, at this time, as long as the head and flow rate of its own circulating oil pump can meet the on-site working conditions.
If there is a difference in the temperature of multiple plates, it is necessary to divide multiple units into small power to heat multiple plates, or if the temperature deviation is not too large, you can consider controlling the inlet and outlet flow to control the different temperature differences of each plate.
In addition to the selection of heating power, it is also necessary to understand the heating production process, whether it is necessary to control the temperature in stages, and the specific requirements for the temperature rise and fall rate.