How to Control the Welding Temperature of Medium Frequency Induction Bend and the Injection Molding Process
Medium frequency induction bends require high temperatures during the welding process to achieve optimal welding results. However, it's essential to control the welding temperature to ensure the best outcome. Here's a detailed guide on how to control the welding temperature of medium frequency induction bends:
1. Use dry welding rods when working with medium frequency induction bends. Titanium-calcium types should be dried at 150°C for 1 hour, while low-hydrogen types should be dried at 200-250°C for 1 hour. Ensure that the welding rods do not get stuck to oil or other contaminants to prevent an increase in carbon content in the weld, which can impact the quality and mechanical properties of the weld. High post-weld hardness can lead to cracking. If the same welding rods are used for welding, it's essential to conduct preheating at temperatures above 300°C and post-weld tempering at approximately 700°C. If post-weld heat treatment is not possible, it is recommended to use chromium-nickel stainless steel welding rods.
2. To enhance the corrosion resistance stability of medium frequency induction bends, elements like Ti, Nb, and Mo should be added. When using chromium stainless steel welding rods of the same type, preheating at temperatures above 200°C and tempering at around 800°C should be performed. If heat treatment is not feasible, consider using chromium-nickel stainless steel welding rods. Controlling the temperature during welding is crucial in assessing the mastery of welding processes. Apart from welding, other post-weld treatments should be carried out to maintain a good welding result.
In general, medium frequency induction bends are bent, and nearly all bends are processed. Various techniques are used during the manufacturing process, including injection molding, which plays a crucial role in shaping the pipes. Here's an explanation of the injection molding process:
1. Utilizing the thermal-physical properties of thermoplastic materials and their reversible cooling and solidification characteristics, the material for the medium frequency bend is added to the external heating and internal threaded barrel through a material hopper. With the action of a rotating screw, the material is transported and compacted along a spiral groove. Under the shear force of the screw and the external heat conduction, the plastic becomes a uniform melt and gathers at the front of the screw, completing the plasticization stage.
2. Under the high pressure and high-speed extrusion of the screw, the melt is injected through the runner into the cavity using cooling equipment. After maintaining a certain pressure, the injection phase is completed. After the cooling phase, the mold can be opened above the pipe. The injection molding process is mainly used for shaping medium frequency induction bends.
During the processing of medium frequency induction bends, injection molding is essential for achieving proper shaping after bending, resulting in excellent outcomes.
The information above provides guidance on controlling the welding temperature of medium frequency induction bends and understanding the injection molding process. We are a trusted supplier of pipes, flanges, and fittings. Feel free to inquire and make purchases.
