Luoyang HongtengIntermediate frequency induction furnace
Induction Heating in Plastic Processing Introduction In thermosetting plastic processing, methods such as compression molding, injection molding, and extrusion are commonly used. During the polymerization (curing) process, both heat and pressure play essential roles. While molds, injection cavities, and extrusion barrels can be heated using gas, steam, or resistance heating, induction heating offers higher thermal efficiency, faster heating speed, and more precise temperature control. How Induction Heating Works in Plastic Processing Induction coils are installed directly onto the mold body. When alternating current flows through the coil at the power supply frequency, heat is generated within the mold. These coils can also be mounted on appropriate components of injection molding machines and extrusion lines, enabling localized heating in the same manner. This prevents excessive temperature fluctuations and reduces power loss, while achieving rapid thermal response and significantly lower heat dissipation. For mold sizes of 750 mm square and above, three-phase power is used. For smaller molds, both single-phase and three-phase induction heaters can be applied, depending on the equipment design and heating requirements. Induction Heating for Extrusion Barrel Heating Induction heating is also well-suited for heating extrusion barrels. Traditional heating methods such as gas, steam, or resistance heaters typically result...
How to Choose the Best Mini Rolling Mill for Jewelry in 2025 Whether you’re texturing sheet metal, reducing wire thickness, or experimenting with pattern rolls, having the right mini rolling mill makes all the difference. But with so many options out there—from budget-friendly models on Amazon to trusted names like Durston—how do you know which one is truly worth your money in 2025? Let me walk you through what really matters when choosing a mini rolling mill for jewelry making today. Understanding the Mini Rolling Mill Let’s start simple. What exactly is a mini rolling mill? At its core, it’s a bench-top machine that uses two hardened steel rollers to compress and shape metal. Turn the handle, feed in your silver, gold, copper, or brass, and out comes uniformly thinner sheet or perfectly drawn wire. Now, why go “mini”? Because full-sized mills can take up serious workspace—and cash. A compact model gives you professional results without needing a dedicated studio. That’s especially valuable if you work from home, teach workshops, or travel to markets. And honestly, most small-scale jewelers don’t need industrial power. You want precision, consistency, and durability—not something that weighs 100 pounds. According to Ganoksin’s guide, no jewelry studio is complete...
Steel Strip Processing Equipment To achieve consistent results in pipe production, the performance and precision of the raw materials—specifically the steel strip—are absolutely critical. The quality of the purchased material must meet strict standards, and its dimensions should remain as uniform as possible. Even a width deviation of just 0.25% can cause complete weld failure when the thickness tolerance reaches half of the allowable range. Under ideal welding conditions, when both edges of the steel strip are pressed together with just the minimum required pressure to form a uniform weld across the entire cross-section, the importance of material consistency becomes clear. 1. The Importance of Precision in Steel Strip Dimensions With modern cutting technology, achieving the required dimensional accuracy is fully possible. However, the direction of the sheared edge plays a key role in determining weld quality and roller wear: If the sheared edge curls upward, roller wear decreases significantly—but it can result in a larger internal weld seam, which is undesirable for the final product. If the sheared edge curls downward, the internal weld seam becomes smaller, creating slightly better welding conditions. Yet, this may increase roller wear and slightly reduce the cross-section of the weld zone. Both factors...
Mini type induction gold melting furnace Hongteng a professional induction furnace manufacturer had developed a mini-type melting furnace for gold melting recently. Compared to the furnace in the market, the Hongteng Medium frequency Induction melting furnace adopts a 3KW-7KW for the 1-3KG melting furnace. With this power configuration, melting time only needs 3-5 mins per batch. gold melting furnace Melting speed fast, and electrical inner setting with the higher standard component, Stable function. Easy to operating. Hongteng had designed carton packing and plywood case packing for air delivery and sea delivery. Good for machine protection and machine delivery cost. Welcome, contact us!
Mechanical Structure of Induction Coils Induction coils must be tightly coupled to the workpiece, but sufficient mechanical and electrical clearances must also be provided. Typically, a complete induction coil design with operating devices and matching components, such as capacitors and transformers, must be implemented. The design must also consider the effects of leakage flux heating, vibration, water, and oil; therefore, the induction coil should be manufactured after the electrical design is completed. The conductor is generally copper with high thermal conductivity and is cooled by water. Most induction coils consist of pipes with segmented water supply. However, sometimes oil or a “viscous” quenching medium can be used to achieve the dual function of cooling the conductor and quenching the workpiece. In some short-cycle, one-time spray quenching operations, the conductor may not be zoned for cooling because spray quenching can achieve both of these effects. Silver plating is often used to improve the surface thermal conductivity, especially at contact surfaces. A typical induction coil is shown. induction coils Most moving induction coils are single-turn and carry powerful currents up to 20 kA. Because reducing the voltage eliminates the risk of voltage breakdown in the presence of quenching media, a single-turn inductor...
Controlling a Prefabricated Atmosphere When metallurgists, engineers, and furnace operators refer to a controlled atmosphere, they are referring to a cold, externally prepared gas of a specific, constant composition, supplied to indirectly heated furnaces such as electric furnaces, radiant tube furnaces, and muffle furnaces. Most prefabricated atmospheres are currently prepared in separate gas generators, which may pass through H₂O and CO₂ absorbers before entering the heating chamber. Most generators utilize partial combustion of a gaseous fuel. Therefore, controlling the prefabricated atmosphere primarily involves maintaining a constant fuel-to-air ratio entering the generator and removing H₂O, CO₂, and other components after combustion over a catalyst. Efforts to reduce the amount of oxide scale formed on steel surfaces predate the term “prefabricated atmosphere” (Control of prefabricated atmosphere). Natural atmosphere As discussed earlier in this book, oxidation can be virtually avoided in a natural atmosphere, provided that a sufficient excess of fuel is present in the fuel-air mixture and the required temperature is maintained. An early example is the air curtain furnace, which appeared around 1927. Under very low air conditions, coal gas is burned in combustion chamber A. A pressure gauge B indicates the fuel-to-air ratio. Incompletely burned coal gas enters the heating...
Induction Steel Melting Furnace
Aluminum Induction Melting Furnace
Stainless Steel Induction Melting Furnace
Medium Frequency Gold Induction Melting Furnace
Small Medium Frequency Induction Furnace
Aluminum/Copper Ingot Continuous Casting Line
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