Crack mold technology molds - molds, mold burst - the plastics industry

Crack mold technology molds - molds, mold burst - the plastics industry

HC WIRE: Mold Crack 1. Mold material well in the follow-up process is easy to fragmentation

2. Heat treatment: Quenching and tempering process improper deformation

3. Mold and insufficient ground plane, resulting in deflection

4. Design Process: Die strength is not enough space too close to the blade, mold structure is irrational, model number plate is not enough without pad foot pad

5. Mishandling cut line: Pull line cut, gap is incorrect, no clear angle for

6. Press equipment used: press tonnage, punching power is not enough, too deep under the transfer mode

7. De material will not ring true: no demagnetization treatment pre-production, no back feed shoot; the production of a broken needle spring break materials such as card

8. Blanking ring true: when the assembly mode seamless feces, or rolling block feces, feces blocking pad feet

9. Production in mind: lamination stamping, location is not in place, do not use air guns, templates, cracks still continue to produce

Die failure mode Main wear failure mode of die failure, failure deformation, fracture failure of such failure and bite injuries. However, due to different stamping processes, working conditions, affect the die life by many factors. Following the die design, manufacture and the use of comprehensive analysis of die life and so the impact of factors, and catching a corresponding improvement measures.

1 stamping equipment Stamping equipment (such as the press) the precision and rigidity of the die life of great importance. Stamping equipment, high precision, rigid, die life greatly improved. For example: complex silicon steel die material Crl2MoV, open press in general use, the average life expectancy of complex grinding 1-3 million, while the new press on the use of sophisticated, complex die wear life of up to 6 to 12 million. In particular, small enough gap or no gap dies, carbide dies and precision die must select high precision and rigidity good press, or, will reduce die life, serious damage will be a chess.

2 Die Design (1) the precision mold-oriented institutions. Accurate and reliable guide for reducing wear of the die parts to avoid the male and female die bite injury greatly affected, especially the non-gap and small gap stamping die, compound die and multi-station progressive die is more effective. To improve the die life, nature of the process and components must be precision requirements, and determine the correct choice-oriented form of precision-oriented institutions. In general, the precision-oriented institutions should be higher than male and female die with fancy degrees.

(2) mold (male and female die) blade geometry. Convex, concave die shape, with the gap and the radius is not only stamping forming a large impact, but also for die wear and life expectancy greatly. If the mold with the gap directly affects the quality and die life blanking. High precision advised to choose a smaller gap value; the other hand can increase the gap due to increased die life.

3 stamping process (1) stamping parts of raw materials.

Actual production, because of external pressure over parts of material thickness tolerance is poor, fluctuations in material properties, poor surface quality (such as rust), or not clean (like oil), etc., will cause increased wear of the die parts, easily collapse Edge and other adverse consequences. To this end, it should be noted: good as raw materials by punching technology to reduce the deformation force stamping; strict inspection before stamping the raw material grades, thickness and surface quality, and wipe clean raw materials, if necessary, the surface should be clear oxide and rust; processes and raw materials according to type of press, if necessary, arrangements can be softened, and surface treatment, and select the appropriate Lubricants And the lubrication process.

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