Investment casting

We are professional casting parts maker in Ningbo, China, where is famous for casting items as a production Zone. We have been offer precision Investment casting service to foreign customer for many year and enjoy good business relation with our customer.

Investment casting process

Investment casting, also known as lost wax casting, including wax pressure, wax repair, group tree, dip slurry, wax melting, casting metal liquid and post-processing process. Lost wax casting is made of wax to cast parts with wax, wax and then coated with mud, which is mud. Mud dry, add hot water in internal wax melting. The melting end clay mold wax removal and roasting into ceramic mold. Roast at once. When the general mold is made, the sprue is left, and then molten metal is poured from the sprue. After cooling, the required parts are made.

Investment casting requires a little or no addition cutting, also known as the lost wax casting in the past, the parts made by investment castings are accuracy in dimensional and surface quality are better than other casting method. In addition,  it can be used for some high complexity, not easy processing casting parts.

Investment casting

Lost Wax Investment Castings

Lost Wax Investment Castings Design Advantages Lost Wax Investment Castings Cost Advantages
  • Lost wax casting provides greater design flexibility
  • Lost wax investment castings provides greater detail
  • Near net shape
  • Greater alloy selection to enhance part performance
  • Surface finishes 120 to 150 RMS
  • Close tolerances ±.005 inch per inch
  • Lost wax investment casting results in weight reduction
  • Lost wax casting provides near net shape lowers material usage
  • Reduce material costs
  • Lost wax investment castings reduces expensive machining operations
  • Eliminate expensive fabrications and weldments
  • Low initial tooling costs
  • Economic order quantities ranging from Prototype quantities to Long Production Runs


Investment casting Quality

Quality Control Policy

  • CMC is committed to provide high quality components with competitive price. Each part will be strickly machined to the print.
  • CMC is committed continually improves the effectiveness of the quality management system (QMS) and sets quality objectives and continuous improvement plans.
  • CMC is committed introducing all staff to its quality policy and quality systems,to familiarize themselves with the QMS and strive to continue to improve upon the quality, capability and work environment.

Material Supply

  • To be sure material specification and size correct.
  • To be sure material chemical composition correct, material certification must be provided in each material purchasing lot.

Equipment Maintain

  • Machining equipments maintain: Checked by each day, have records to track.
  • Inspection equipment maintain: Checked by each 15 days, have records to track.

Machining Process

  • Setup work instruction chart for each part.
  • Check production process and updated drawing issue before machining.
  • Fixed Inspection: 4 times/shift, have records to check, carried by QC.
  • Random Inspection: to avoid uncertain potential quality issues.
  • Final Inspection: Each part have its final inspection stardard before packing, have inspection sheet to track.

Packing and Assembly

To meet custom requirments, including labels, cartons, pallets etc before shipment.