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Company Profile

Duolin as brand of Induction heating machine manufacture and induction heating solution provider founded in 1994.More than 20 years of experience and history have won the high trust of customers In China and abroad.

Chengdu Duolin Electric Co., Ltd.


Induction heating equipment power 4-2000KW work frequency 0.5-400Khz.Product design research and develop by Duolin engineer team,and strictly produce under ISO9001:2015.Duolin as High-tech enterprise,approved more than 20 national patent,Provide green and reliable energy for production and processing enterprises.


The induction heating system widely used in billet bar blank carbon steel hot forging, induction power supply for gear shaft wheel pin hardening and quenching, long bar induction hardening and tempering, thread bar heat treatment, pipe induction heating for hot bending and other color metal heating,aluminium cooper....


Since 2007, we have been doing foreign trade and have agents in Brazil, Germany, Argentina, UK, Iran, Russia, India, Pakistan and South Africa. End user in Greece,Canada Vietnam,Indonesia...Some end users who have been cooperating with us since 2009.

Main Workshop

Main Workshop

Machine Debug

Machine Debug

Machine Assemble

Machine Assemble

Function Test

Function Test

CNC

CNC

Induction Heating System Drawing

Induction Heating System Drawing

PCB Board Welding

PCB Board Welding

Production Meeting Per Month

Production Meeting Per Month

Shearing Machine

Shearing Machine

Warehouse

Warehouse

Welding

Welding

Duolin Culture

Constantly Strive To Be Stronger,Keep Moving In Induction Heating Industry

Our History

The first full solid state high frequency induction heating machine

1994

The first full solid state high frequency induction heating machine was developed successfully in China By Mr Zengxiaolin,the founder of Duolin

2003

2003

Obtaining two national patents for full solid state induction heating and high frequency XRF sample preparation equipment
The modernized 10,000 square meters factory was established and started to be used Certified ISO9001:2000 international quality certification
12 regional offices scattered in different provinces of China were established

2006

2006

High frequency XRF Sample preparation equipment was awarded a RMB 170,000 Scientific&technological innovation grant
PLC controlled quenching machine tool was developed
Fourty(40) after-sale service offices was established all over China
Induction furnace for melting gold and silver was developed

2008

2008

Restructuring of enterprise is employee shareholding system
TSP training department was established formally
MF induction heating equipment MFP-300,500 was developed
High temperature aging laboratory was completed
RMB300,000 was donated to public welfare undertaking
Duolin Machining factory was establisehd on 28th Oct 2008
RMB100,000 was donated because the Wenchuan 8.0 Earthquake on 16th May 2008

2013

2013

Medium Frequency Modular Induction Heating Machine was developed; High Frequency Induction Heating Machine HGP30 (100-200 KHz, 30kw) was developed.

2018

2018

BYD Partner for induction pipe bending in Guangzhou Ningbo fasteners exhibition

1000KW Big Power Mould Induction Heating System

2019

1000KW Big Power Mould Induction Heating System Research and Produced By Duolin Team

Shanghai Metal Forming Exhibition

2020

Shanghai Metal Forming Exhibition

Help Customer to Improve the Manaul Rail Spike Head Forging Production Line to be Automatic

2022

Help Customer to Improve the Manaul Rail Spike Head Forging Production Line to be Automatic

1994

2003

2006

2008

2013

2018

2019

2020

2022

Our Certificate

2004 All-solid-state induction heating equipment patent ZL03 2 33138X

2004 Fully automatic high-frequency melting equipment patent ZL03 2 34189X

2009 All-solid-state high-frequency induction heating power supply for sealing machine ZL2009 2 0078560.3

2009 Energy-saving high-power IGBT series resonant medium-frequency induction heating power supply circuit ZL2009 2 0078558.6

2009 Intelligent high-frequency crucible mold separation melting system ZL2009. 2 0078561.8

2010 Rivet heating patent ZL2009 2 0078559.0

2010 Integrated transformer patent

2010 Remelting furnace patent

2012 Medium frequency bending pipe heating equipment based on IGBT

2012 Aluminum melting furnace equipped with IGBT induction power supply

2012 A heating device for C-type ring heating furnace

2012 A device for coating solar collector tubes

2013 Constant temperature control system for high-frequency melting machine equipment

2013 Two utility model patents for current balancing system and full-bridge inverter unit of ultra-high power IGBT induction heating equipment

2014 Current sampling system

2014 Temperature-controlled medium frequency heating

2014 Automatic feeding

2016 Two utility model patents for current balancing system and full-bridge inverter unit of ultra-high power IGBT induction heating equipment (invention patent)

Social Responsibility

Provide green energy to protect the environment

Substitute high frequency vacuum tube induction machine,it can save electricity water and smaller installation space


Good quality of part and environmentally friendly,can substitute heating method by gas,fuel and coal,reduce pollution


Easy operation and good working condition

Why Choose Us

Why Choose Us

More than 20 years of experience in induction heating industry


Free test for choosing the machine model before purchase


Product design research develop and maintain by the Duolin Engineer team,machine lifetime service


Test the machine as customer heating requirements and aging more than 6 hours to guarantee the good quality


Offer installation manual and troubleshooting guide


Use famous brand components Infineon Omron Schneider to ensure quality of material

Customer Visits

Your team are warmly welcomed to visit our factory and discuss heating requirements for induction heating systems face to face.

South Africa Customer For Long Bar Hardening And Tempering Line

South Africa Customer For Long Bar Hardening And Tempering Line

Pakistan Customer Pipe Heating Test

Pakistan Customer Pipe Heating Test

Nigeria Customer For Hot Pipe Bending

Nigeria Customer For Hot Pipe Bending

MetalTech Newzealand Customer

MetalTech Newzealand Customer

Meet Saudi Arabia Customer In Shanghai Exhibition

Meet Saudi Arabia Customer In Shanghai Exhibition

Indonesia Shaft Induction Hardening Equipment Installation

Indonesia Shaft Induction Hardening Equipment Installation

India Agent For Study

India Agent For Study

Germany Customer For Agent

Germany Customer For Agent

Customer From Russia Chain Heat Treatment

Customer From Russia Chain Heat Treatment

Bulgaria Customer  For Induction Bar Hardening Project

Bulgaria Customer For Induction Bar Hardening Project

Argentina Customer For Hot Bolts Making Project

Argentina Customer For Hot Bolts Making Project

After-sale service for Chain Hardening And Tempering

After-sale service for Chain Hardening And Tempering

Turkey Customer Hot Forging Meeting

Turkey Customer Hot Forging Meeting

Indonesia Customer for Heating

Indonesia Customer for Heating

Get In Touch

Know about the heating temperature and heating production,work out the suitable induction heating solution for you.

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