Nanhai Heavy Machinery
Nanhai Heavy Machinery
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    • Home
    • ABOUT US
      • Who We Are
      • Our Partner
    • Products
      • Mining
      • Oil Sand & Gas
      • Heavy Equipment
      • Cement
      • Agricultural Machinery
      • Power Generation
      • Valve Parts & Fittings
      • Steel Rolled Rings
    • Wear Liners
      • Bi-Metallic Castings
      • Laminate Bi-Metal Liners
      • WC Overlay Products
      • CCO Wear Liners
    • BLOG
    • Contact US
  • Home
  • ABOUT US
    • Who We Are
    • Our Partner
  • Products
    • Mining
    • Oil Sand & Gas
    • Heavy Equipment
    • Cement
    • Agricultural Machinery
    • Power Generation
    • Valve Parts & Fittings
    • Steel Rolled Rings
  • Wear Liners
    • Bi-Metallic Castings
    • Laminate Bi-Metal Liners
    • WC Overlay Products
    • CCO Wear Liners
  • BLOG
  • Contact US

WHO WE ARE

  • We are a manufacturer and distributor of cast, forged, and machined steel & iron products. 
  • We have steel & iron casting foundries and machining shops in China to stay cost competitive. 
  • We are operating our offices in North America, to stay close to our customers. 

Our Facilities

OUR Sand Casting Foundry

  • Located in Hebei China, our 200,000 sq. ft. sand casting foundry focuses on producing quality sand castings between 20-25,000 lbs, with low alloy steel, high Chromium iron, and Manganese steel. More than 70 experienced employees work here to manufacture cold-box and shell mold castings. We also do machining in house to provide value-added service to our customers. 

OUR Investment Casting Foundry

  • Our investment casting foundry, located in Ningbo China, is consisted of a lost-wax casting foundry plus a precision machining shop. We apply lost-wax process to precisely cast low alloy and stainless steel parts ranging from 1 to 150 lbs.  More than 80 skilled employees are working here, including 20 highly-professional engineers and well-trained technicians.  

OUR SAND CASTING FOUNDRY

  • Our sand casting foundry manufactures quality sand castings by cold-box molding as well as shell molding. We are able to produce a casting weighs between 20-25,000 lbs. Our typical sand casting production processes are as below. 

Foundry Sand Mixer

Foundry Sand Mixer

Foundry Sand Mixer

  • All sand castings start with molding sand preparation and mixing. Our own foundry sand mixer ensures quality casting sand is used for our customers.

Molding

Foundry Sand Mixer

Foundry Sand Mixer

  • Casting mold is a shaped cavity made from wood or metal casting patterns. We apply cold-box as well as shell molding to manufacture sand castings. 

Melt Making

Foundry Sand Mixer

Melt Making

  • Melt is made with four sets of electric furnaces in our facility. The capacity of the furnaces ranges from 2,000 lbs to 80,000 lbs.

Pouring

De-Sanding

Melt Making

  • This process involves pouring melt into casting molds through gating system. To get sound castings, this process is always done by our experienced team.

De-Sanding

De-Sanding

De-Sanding

  • De-sanding is a process that removes a casting from a sand mold. We make sure all castings in our shop are de-sanded at right timing with right manner.

Trimming

De-Sanding

De-Sanding

  • After de-sanding,  risers, gates, or other infrastructure that are needed to make sound castings, are trimmed off from castings. 

Heat Treatment

Heat Treatment

Heat Treatment

  • We are equipped with multiple furnaces in different sizes to implement heat treatment in house. 

Shot Blasting

Heat Treatment

Heat Treatment

  • Scale, burs, dirt or other undesirable substances are removed from castings by shot blasting. It also makes your castings aesthetically pleasing! 

Inspection

Heat Treatment

Inspection

  • Last but not least, final inspections are done before castings leaving our shop. Our skilled and certified inspectors can do chemistry, mechanical properties, dimensions, MPI, LPI, and UT tests.  

OUR INVESTMENT CASTING FOUNDRY

  • Check out this video showing our facility and capability on investment casting. Our investment casting foundry is equipped with 4 sets of medium frequency electrical melting furnaces, together with annealing and normalizing furnaces for heat treatment purposes.  We are able to do chemical analysis, dimensional inspection, mechanical properties test, hardness test, MPI, LPI, and UT test in house.  We are also co-working with  third-party labs to make sure all our customers’ requirements are met.

OUR machining services

  • We are equipped with multiple machine centers, CNC lathes and mills, to provide machining services, including turning, milling, drilling and grinding, to metal castings, forgings, and bar stocks. In addition, we are able to machine Chrome White Iron hardened over 60 HRC! 

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