Mould application of single-end electric heating tube

Mould hole heating process is * common plastic material, molding method, one of the * historic and is the study of material performance * often USES a process method. It has the molding device is simple, less investment in equipment, mold the characteristics of simple structure, the mechanization and automation in the production of highly developed today, is still a * is one of the popular means of production. But what are the key techniques in the design of heating tube mould hole. Mould heating, heat preservation and cooling and the clamping structure is an integral part of the composite mold design. Structure design will directly affect the appearance and intrinsic quality uniformity of products, but also affect the forming efficiency. 1. The design requirements of heating tube stainless steel heating tube is almost all plastic molding mold design must adopt heating means, can be designed for a variety of forms such as one-way connection, two-way, material can be used with seam pipe, seamless tube, is characterized by low heat loss, high thermal efficiency, simple wiring, can design according to the need for 220 v or 380 v, flexible connection for the type. But because of the limitation of its materials and processing technology in the mold design should pay attention to it to the body. ( l) Heating pipe at both ends are usually have longer cold end, does not have the effect of heating. ( 2) Heating period of power design as far as possible not more than 10 w/cm. Such as 20 centimeters long heating tube, as far as possible do not exceed 200 watts. If the design power exceeds this limit, high surface load of heating tube, steel tube easy oxidation corrosion, cause a short-circuit. Yancheng unisoft adopted imitation imports, power can be heating tube is slightly larger than normal. ( 3) For mold design temperature higher than 250 ℃, using heat pipe has the certain difficulty. I used to use thermocouple temperature reached 420 ℃, but the forming temperature on the heating tube quality is higher, need to check the flow of the circuit and short circuit or not. Because of this condition, the heating tube and terminal blocks, connected with copper wire and other media is very easy to oxidation, resulting in open circuit. For electricity transmission medium need special treatment, try to avoid making conductive wires exposed to air, prolong the service life of the wire. Indispensable in the design of insurance, insurance measures, such as air switch operation by to keep clean and tidy, good insulation, and check the electrical faults in the operation, prevent unnecessary danger. 2. Understanding on the installation of the heating pipe drilling from the Angle of heat transfer, the installation of the heating tube to the surface as nicely as possible, and die for heating tube of the heat is passed on to the mould as soon as possible. Such as mould hole is 18 mm in diameter, the diameter of the heating tube is set to 17. 8 mm more appropriate and actually heating tube with mold and not much contact area and heat transfer is the nature of radiation, conduction is secondary.