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Types Of Dies: 4 Methods To Classify

1. Die hardness

(1) Soft die

Die steel has been pre-hardened, without quenching but with lower hardness at HB 400 or less and the production life of 500,000 times or less, which is widely used.

(2) Hard die

The die steel is annealed, and the processing is divided into two rough machining and finish machining.

Quenching after rough machining, with a hardness of HRC48° and above.

After rough machining, it needs to retain allowance of about 0.2.

The workpiece will be deformed after quenching treatment in case the finishing process does not meet the workpiece requirements.

The life of production is more than 50 to 1 million times, most often used for small dies.

Die hardness

2. Mold quality level

Quality of Level 1 die

Dies: They must be able to have a million or more times of die sinking.

This is the Level 1 die, customers request that it must use the best materials and accessories to make the best dies.

The requirements for Level 1 dies are as follows.

(1) Detailed die design (with computer drawings and materials);

(2) The hardness of the die base must be at least HB280;

(3) The core of the die must be at least HRC50 hardened, and all rows and fittings must be hardened;

(4)The thimble must be centered on the side of the tube;

(5) The position of the die must have a wear plate;

(6) The temperature control monitor must be installed in the mold, die or row position according to feasibility;

(7) It is recommended that all cooling water channels be nickel-plated (ELECTROLESS NICKEL PLATING) to prevent rusting and for easy cleaning.

(8) It is necessary to add a positioning lock to the parting line.

Mold quality level

Quality of Level 2 die

Dies: it must be able to have half a million or more times of die sinking.

This is a Level 2 and high-level quality die, which must use good materials and accessories,  with certain standards (dimensional accuracy) in the mold tolerances. This die also requires top quality.

The requirements for Level 2 die are as follows.

(1) Detailed die design is recommended

(2) The hardness of the die base should be at least HB280.

(3) The core of the die must be at least HRC48 hardened, and all rows and fittings must be heat treated.

(4) The temperature control monitor shall be installed in the die, or line position as feasible.

(5) The parting line must be equipped with a positioning lock.

(6) The following requirements may be specified on an individual basis and at the time of quotation.

Quality of Level 3 die

Die: It must be twenty-five thousand or more times of die sinking.

This is a general die requirement, production is also in the production die.

Level 3 die requirements are as follows.

(1) Die design is recommended.

(2) The minimum die base hardness should be HB165.

(3) The core of the die must be at least HB280.

(4) In addition to the above three basic requirements, all other requirements are regarded as optional additional requirements.

Types Of Dies

Quality of Level 4 die

Die: About 10,000 times of die sinking.

This is a low production die, which has no special requirement in general, but the quality of the die should be good and acceptable to the customer.

The requirements of Level 4 die are as follows.

(1) Die design is recommended.

(2) The die base may be regular copper or aluminum.

(3) Die material can be made of aluminum or steel with the customer’s approval.

(4) In addition to the above three basic requirements, all other requirements are regarded as optional additional requirements.

3. Die difficulty

  • A level: A complex structured die with multiple row positions, multiple splitting on the top of the slant, core pulling and rotary core pulling.
  • B level: complex dies with multiple (two to four) rows of slanting tops, two to three times splitting, and core pumping.
  • C level: Simple fine spout dies with one or two rows, slanting tops and other general structured dies.
  • D level: simple structured dies like large nozzle die, two-plate die, no row position and no slanting top

4. Die size

Extra-large: dies with a width of 800mm or more.

Large: dies with a width of 600~800mm (excluding 800).

Medium: dies with a width of 350 to 600 mm (excluding 600).

Small: dies with a width of 350mm or less.

If you plan to buy a stamping press machine and want to work with a reliable manufacturer, why not try contacting our team of engineers, we won't let you down.

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