rolling mill for rebar 8mm- 25mm

rolling mill for rebar 8mm- 25mm , steel billet plant, turnkey system.
for more information, pls refer to our official website:www.wzsuperb.com. and send to our email:info@wzsuperb.com

Trusted induction furnace manufacturer from shanghai cooldo

SHANGHAI COOLDO INDUSTRIAL CO.,LTD

COOLDO is a manufacturing and service business that has been in operation since 1999.We specialize in the design and manufacture of various induction melting furnace and induction heating equipment  and have developed a  wide range of customized induction furnaces.

Over the years we have forged excellent relationships with many scientific and technology institutes both in China and internationally. Induction melting furnaces are our knock out product which make use of IGBT and KGPS technology along with high and ultrasonic frequency induction heating equipment. Our range of world class, high quality products has many applications for metal melting and heating for bending, forging, metal quenching and brazing etc.

we are specialized in the complete project solutions for metal melting, heating and casting workshop. Involved in the application are：

• Gold melting furnace/machine
• small foundry 

• Steel  plant

•copper melting furnace/machine

• aluminum melting furnace/machine

• 60-150 square mm steel billet production line

•closed water cooling system

for more information, pls check our website:www.wzsuperb.com

dual track induction furnace for foundry

Dual track induction furnace for foundry, both furnace can used to melt, or one furnace body melt, one 


furnace for keeping warm. 15+safety design, longlife technical support, whole year warranty,


the most energy saving induction furnace in china, for more information , pls send email to :sales@induction-heaters.net



and refer to our website: www.wzsuperb.com

The advantage of main equipment components in COOLDO INDUSTRIAL
     www.wzsuperb.com

1、Medium frequency power supply

（1）、Principle of work

Through the three-phase AC power supply through the three-phase bridge rectifier, become adjustable DC power supply, through the reactance filter, filter after losing to the single phase inverter bridge, Through the pulse control, make single bridge diagonal alternation switch become single-phase 1000hz intermediate frequency current. Resonance circuit is made by induction coil and compensation capacitor composition, and the current to the induction coil .The sensors in metal charge generating vortex, then heated to melting furnace

（2）、Main components—silicon-controlled rectifier ：

The silicon controlled my company used is main procurement in Hubei TECH Semiconductors Co., Ltd. (TECHSEM)、Hangzhou Hanan Semiconductors Co., Ltd and Zhejiang Sifang Semiconductors Co., Ltd, the three companies above are China silicon manufacturing industry leader, the production of the silicon controlled quality and stability, have a strong ability of anti impact current，not easy to damage, 20%~30% higher price than the same industry.

（3）、Main components—the main control circuit board：

Parallel SCR intermediate frequency power supply used in circuit board, it is my company independent research and production, research and development engineers timely update and improvement of circuit board  that guarantee the company in the industry leading level; production welding circuit board all through my company profession quality inspection personnel test and check one by one, to eliminate substandard products sold out and ensure that the equipment safety.

（4）、Main components—circuit breaker：

My company uses the circuit breaker in the procurement of Shanghai people Electric Appliance Switch Factory. This company was founded in the nineteen seventies, it is the production and sales of high and low voltage electrical appliances, instruments and meters, complete set of power transmission and distribution equipment, high voltage electrical components, building electrical appliances, wire and cable products research and development, production, sales and services for the integration of a manufacturing enterprise. This enterprise won the "Chinese enterprise image AAA level enterprise", "Chinese famous quality products", "China hundred outstanding enterprise" and so on the title. 

         

2、Capacitor device：

（1）、Principle of work 

 Capacitor cabinet and the induction coil connected in parallel to compensate for the induction coil of the inductive reactive power, at the same time with the coil to form a resonant circuit to achieve proper frequency and equivalent impedance. After compensation, intermediate frequency power supply need only provide required load active power and a small amount of reactive power, intermediate frequency power supply capacity can greatly reduced.

High power induction furnace needs a large amount of compensation capacitor, in order to reduce the occupied space and electromagnetic leakage. My company's capacitor cabinet adopts a unique double installation mode. Large current water bus use special mold custom, water cooling chamber and a molded copper, No welding, therefore no oxidation, water cooling and the conductive efficiency is high.

（2）、Main components—electric capacitor

    Capacitor cabinet used to compensate the reactive power of induction coil, At the same time with the coil to form a resonant circuit, to achieve proper frequency and equivalent impedance. After compensation, intermediate frequency power supply only need to provide the required load active power and a small amount of reactive power. Intermediate frequency power supply capacity can be greatly reduced. The electric capacitor my company used is main procurement in Xin'An River Power Capacitor Limited and Hangzhou keang  power & electrical apparatus Co., Ltd. These two companies are famous for domestic electric capacitor production enterprises, registered capital of over RMB20000000. Because of its first-class quality, overvoltage capability, win the user's consistent high praise in the long-term process of applications

  

3、Coreless induction furnace aluminum furnace

（1）Principle of work

Intermediate frequency electric furnace complete sets of equipment is change the frequency of 50HZ alternating current into intermediate frequency（more than 250HZ to 2500HZ），the three-phase alternating current into direct current, after the rectification, the DC power into the adjustable frequency current, Supply consists of a capacitor and an induction coil in the intermediate frequency alternating current flowing, to produce a high density of lines of force in the induction coil, and cut the metal materials filled in the induction coil, in metal materials they will have a great eddy current. It based on the principle of electromagnetic induction heating metal. Use of intermediate frequency power supply establishment of intermediate frequency magnetic field, the ferromagnetic material generated internally induced eddy current and heat to achieve the heating material for the purpose. Intermediate frequency electric furnace uses 250-2500Hz medium frequency power supply for induction heating and melting heat. Intermediate frequency electric furnace for smelting steel, alloy steel, special steel, can also be used for copper, aluminum and other non-ferrous metal smelting and extraction temperature. Equipment has the advantages of small volume, light weight, high efficiency, less power consumption, melt fast temperature rising, the furnace temperature is easy to control, high production efficiency.

My company produces aluminum shell furnace use thickening type high purity aluminum panel, can be used for a long time without deformation, stable.

（2）Main components—induction coil

Induction coil used in type T2 (99.9% purity electrolytic copper), wall thickness ≥ 4.5mm extrusion of rectangular tube in the special die winded, It ensures the coil of the rigid, and also has the most conductive section. According to the ISO431-1981 standards for selection of coil material, reach minimum copper loss and high electromagnetic conversion rate.

Induction coil made of high temperature resistance, high pressure resistance insulating paint, insulation grade reaches H grade. Induction coil before they leave the factory will after 12kg/cm2（Schematic diagram for the water pipe and the induction coil connected）hydraulic pressure test 36 hours and 7000v withstand voltage test, there is absolutely no water leakage phenomenon 

Classification of induction furnace

According to the power frequency, electric induction furnaces can be divided into three categories: high frequency furnace, medium frequency furnace and power frequency furnace; 

According to the Requirement of application, it can be divided into melting furnace, heating furnace, heat treatment equipment and welding equipment; 

According to the structure form, transmission methods and so on, it also can be classified. Generally, electric induction furnace be divided into several types: cored induction furnace, coreless induction melting furnace, vacuum induction melting furnace, induction hardening furnace and induction heat equipment, etc.

Following we will introduce cored and cordless induction furnace 
   

Cored induction furnace
Cored induction furnace is known as iron core through induction coil, and the heat source is a round metal groove, so it is called a groove type furnace. Additionally cored induction furnace can be divided into two kinds: the slot type and the closed slot type. Basically, the slot type has been eliminated, the closed slot type is in the majority now.  Cored induction furnace is mainly used for copper, aluminum, zinc , other non-ferrous metals smelt and heat preservation, as well as it can preserve heat for the cast iron, etc. This type of furnace have a series of advantages, such as fast heating, high electricity and thermal efficiency, high power factor, less metal loss, smelting low cost, less equipment investment(1/2~1/3) of the coreless induction melting furnace), convenient operation, etc. However, there should be a melt in the furnace when machine start working, it is difficult to play the furnace and change the metal, so, it only applies to smelting and preserving heat for a single varieties and large quantities of metal .

Coreless induction melting furnace

The name of the coreless induction melting furnace is relative in the cored induction furnace, and the metal liquid is in a crucible, so it is also named crucible furnace. This type furnace is mainly used for special steel, cast iron, non-ferrous metal and its alloy smelting and preserving heat. Coreless furnaces are many advantages, such as high melting temperature, less impurity contamination, alloy composition uniformity, good working conditions and many others. It Compares with cored induction furnace, it is easy to start the furnace and change the metal, it is more flexible, but its electrical and thermal efficiency, is far less than cored induction furnace. Because of the low surface temperature, it is inapplicable for high temperature smelting slag making process

                                                              COOLDO TECHNICAL DEPT

The Difference Between Closed and Open Circuit Cooling Tower Systems

The Difference Between Closed and Open Circuit Cooling Tower Systems

A cooling tower is used to cool and circulate water used in settings such as induction heating machine, induction melting machine and other plants, Cooling towers extract waste heat to the atmosphere through the cooling of a water stream to a lower temperature.

There are two different types of cooling towers: closed circuit cooling towers, and open circuit cooling towers. Both types of towers serve the same purpose, but they go about cooling the water in different ways.

A open circuit cooling tower is an enclosed structure that distributes warm water over a labyrinth-like packing or fill, which provides an expanded air-water interface for heating of the air and evaporation to take place. The water is cooled as it falls through the fill, and is then collected in a cold water basin below. The heated moisture-laden air leaving the fill is discharged into the atmosphere.

  

A closed circuit cooling tower no contact between the air and the fluid being cooled. This tower has two separate fluid circuits, one in which the fluid is recirculated on the outside of the second circuit, which is a bundle of tubes through which the hot water is flowing. The air drawn through this cascading water provides evaporative cooling similar to an open cooling tower, except that the cooled water never makes direct contact with the air

Why SHANGHAI COOLDO INDUSTRIAL CO., LTD.

 make strong suggestion to use closed circuit cooling tower even though it much higher cost than the open circuit cooling tower ,

Because: 

1, The water never contact with the air, keeping the water clear.
2, The clear water can extend life-span of the machine.

                        3, Responding the call of Water conservation. 

COOLDO TECHNICAL DEPT.

2016-03-17

How to choose the induction heating machine

How to choose the induction heating machine.

According with the difference frequency of alternating current output, we can divide into 5 kinds of induction heating machine.

Please let us know the items as below. 

1 , The shape and size of workpiece

• Big workpiece, bar, solid material, should use big power but low frequency induction heating machine.
• Small workpiece, Tube, plate material, gear should use small power but high frequency induction heating machine.2 , The heating depth and area.       

• Deepest, large area, bulk heating should use big power and low frequency induction heating machine.
• Small Deep,small area, partial heating should use small power and high frequency induction heating machine.

3 , Heating speed.         

• If need high speed, should us big power and high frequency induction heating machine.
• 4, Continuous working time

• If Long time using, should using a little big power induction heating machine.
• 5, other technological requirement

COOLDO TECHNICAL DEPT.2016-04-06