Step 1: Choose Raw Material
We will according to the customer’s mold life and price requirements to choose the appropriate mold materials.All raw materials are verified for conformity upon receipt. Our Quality Control team inspect dimensions, hardness to ensure molds’ long service life.

Step2: CNC machining to make the general structure of the mold
To ensure accuracy, Sino Mfg’s CNC machining section is consisted of two lines, one of which processes electrodes exclusively while the other processes steel only. Also all machines are maintained on a regular basis.

Step3: Wire Cutting EDM to make complex structure and copper electrode
Low speed wire cutting is the use of continuous moving fine wire (called electrode wire) as the electrode, the workpiece is pulsed spark discharge etching metal, cutting molding. It is mainly used to process a variety of complex and fine workpiece. The slow moving wire (also called the low speed wire EDM machine) electrode wire for low speed one-way motion, and the surface quality is close to the grinding level. The electrode wire is no longer used after discharge, and the processing quality is good.

Step4: Grinding process
Precision surface grinding in plastic injection mold making is essential in order to produce high quality molds. From beginning to end, nearly every mold component must be ground with cutting edge equipments. Our equipments include:

• Manual surface grinder            • Tool-and-cutter grinder
• ID-OD grinder                            •  Jig grinder
• Blanchard grinder                     • Centerless grinder
• CNC surface grinder                 • Ded-Tru grinder

Step5: EDM
EDM has long been the answer for high accuracy, demanding machining applications where conventional metal removal is difficult or impossible.
At SINO MFG, considerations for EDM efficiency include depth, accuracy and finish, and components to consider include drives, generator, programming system and flushing.

Step6: Mold Surface Finish
The surface finish includes polishing, texturing, sandblast, engraving, coating(chrome or titanizing), All finishes are conducted under SPI standard.

Step 7: Fitting & Assembly
Mold assembly is one of the most critical steps of mold making procedure, all the parts machined or purchased need to be put together and required to be work functionality. Mold assembly job requires comprehensive understanding of mold structure as well as injection molding.
To ensure accuracy, Sino Mfg applies spotting machines for fitting and assembly.

Step8: Mold Trials
Mold trials are conducted to confirm that the mold works as it should. During the trial period, molds should be carefully tested and examined in accordance with standard procedure.