Heating, cooling and insulation and mold clamping structure is a composite material integral part of the mold design. Structural design directly affects the appearance and internal quality product uniformity, but also affects the efficiency of the product formed. Instruments for particle size analysis of the surface of different principles can contact angle measurements, different measurement principle is based, it is not the same particle characteristics, only the contact angle equivalent contrast, a direct comparison can not be laterally. Such as sedimentation particle size analyzer is based on an equivalent particle settling velocity contrast, the measured vertical diameter settling velocity equivalent diameter, which uses the same diameter and the measured particle settling velocity of homogeneous spherical particles to represent the actual particle size. Diameter of the laser particle size analyzer is the use of laser light diffraction and scattering characteristics as an equivalent contrast, the measured particle size of the equivalent scattering equivalent diameter, i.e., with the actual measured particles having the same effect of scattering spherical particles to represent the actual size of the particles. When the measured particles are spherical, the equivalent diameter is its actual diameter. However, due to the shape of the powder particles of the material can not be uniform spherical, have a variety of structures, and therefore, in most cases the measured particle size analyzer particle diameter is an equivalent sense, The actual particle size distribution and have some differences, and therefore has only relatively significance. Equivalent diameter of the heating plate insulation commonly used asbestos board insulation or asbestos cloth, asbestos cloth, but not easy to put a flat optical contact angle measurement, there are definite impact on the platen parallelism guarantee. Many types of asbestos board, the most common is paronite WORK contact angle of the surface energy, but this is not right for sealing asbestos board insulation materials used, a certain pressure level can win, but will be released at high temperatures out of a very unpleasant odor, affecting the operating environment and the health of the operator. Heating plate asbestos insulation board should adopt common specification is 1000 × 1000,3-5mm thick plate is more structured, better parallelism, compressibility more evenly, no odors at high temperatures. Video contact angle measurement instrument ShengDing (certified), the contact angle provided by the Dongguan Sheng Ding Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) is Dongguan, Guangdong, dedicated instrumentation leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Sheng Ding instrument in leadership with the staff warmly welcome all inquiries negotiations to create ShengDing instrument a better future.