A.Review quality reports on raw material provided by suppliers

B.100% incoming quality checks on hardness, ensuring to meet the specified hardness range. Material that fails the checks needs to be refined

C.Check on defects such as pin holes and hardness spots

A.In accordance with specification, check allowance on length, width and thickness

B.Rough mill according to job specification, thickness allowance without refining should be in the range of 0.9-1.2mm, length and width allowance being in the range of 1.5-2.5mm

C.Should refining or stress relief be needed, allowance should be reserved in the basis of “The Heat Treatment Guidelines”

A.Machine and chamfer eye bolt holes according to the drawing. Reference corner is marked with paint. (M48 or holes bigger than 2 inches should be machined on CNC)

B.Should refining or stress relief be needed, chamfer needs to be enlarged on eye bolt holes, and engraved on reference corner for identification. (Before machining, use scrape material for tool trial)

A.Rough pocket with allowance, allowance for pocket depth being 1mm, internal width and length being 1-1.5mm

B.Should refining or stress relief be needed, allowance should be reserved in the basis of “The Heat Treatment Guidelines”

C.Engrave job number, plate number, material type and reference corner after rough pocketing

A.Refine and heat treat the work piece as required by customer

A.Machine as required and eliminate distortion. Control allowance in the range of +0.2/+0.25, ensuring parallelism and flatness that fall within 0.03mm. Achieving good surface finish.

B.After machining, engrave job number, plate number, model no., plate thickness, alloy steel types and actual dimensions and tolerances. ( negative tolerance on plate thickness is by no means allowed)

A.For length and width less than 800mm, rough mill four sides with double-headed rotary milling machine, tolerance being +0.05/0. Apply anti-rust oil after the final mill.

B.Check if C-corner or any other items need to be machined. Before off loading the mold base from the machine, be sure that reference corner has been clearly marked with paint, order number, plate number and steel type clearly written on the mold base.

A.Chamfer all sharp corners to C1.5~2

B.Ensure no scratches or dents on the sides

A.Machine water channels and ejector holes as per drawing. Ensure no scratches or dents to be made during machining.

B.Both horizontal and slanted water channels need to be machined and properly threaded.

C.Punches are needed to be made on CNC before machining the ejector holes on the profile side. Check if the ejector holes function properly before gun drilling.

A.Holes for pins and bushes need to be rough jig-bored, allowance being 0.15mm for diameter ≤ Φ25, otherwise 0.25mm. Shoulders of the holes are fine machined and chamfered.

B.Pocket machining, pocket depth allowance being 0.05mm, tolerance on pocket width being 0.1-0.15mm. Ensure the tolerance of the pocket centre is within 0.03mm, threaded holes in the pockets are also machined and chamfered.

C.Pry slots,, air vents, pockets, clamping slots need to be machined complete. Holes for springs and other items also need to be machined complete. Ensure good surface finish.

A.Pocket machining, pocket depth allowance being 0.05mm, tolerance on pocket width being 0.1-0.15mm. Ensure the tolerance of the pocket centre is within 0.03mm.

B.Machine and chamfer all the items on lateral sides as per drawing, Datum on the thickness direction are taken based on reference corner.

C.Slanted holes on lateral sides need to be flat. Proceed to machine and chamfer the counterbore holes of the water channels and clamping slots.

A.Thread male and female as per drawing. (M5 or below needs to be pre-threaded)

A.Chamfer all the holes on non-parting surface, debur the water channels and ejector holes.

B.Clean up all threaded holes and water channels.

A.Water grind the plate, ensuring the thickness tolerances to be 5c which will be removed after fine machining ( thickness tolerance being negative is absolutely not allowed)

A.Pockets, pocket holes, threaded holes and ejector holes are fine machined on CNC according to the drawing. Check from time to time if tolerances are met. All pockets and holes on the work piece are manufactured by the same CNC machine to ensure high precision.

A.Pockets, pocket holes on the lateral sides and houses for side locks are fine machined on CNC according to the drawing.

A.After fine machining, regrind the surface of the plate to achieve exact dimension. (Final thickness less than nominal is absolutely not allowed)

A.Cleanse the mold base with high pressure water jet

A.Assemble the mold base according to the drawing, smooth opening and closing need to be ensured. All engraved characters and information are clearly visible. Anti-rust oil is properly applied. Finally, the mold base is tightly packed.