1.Injection Mould material
Steel is the decisive factor in the quality of the mold, choose a reasonable steel is the most important. The standard for selecting steel is:
Requirements for injection molding materials---Different plastic material should choose different steel, such as the requirements of high polishing, corrosion-resistant requirements, etc.
‚Price---Steel properties is enough good to use , is not more expensive more better. Taking into account the factor mold cost , the choice of mold steel and mold life should be corresponding to avoid unnecessary. waste. Generally, the material P20 life of about 30 million shots; 2738 is about 50 million shots , H13 / 2344 usually is 80-100 million shots or more, according to the situation to choose.
Heat treatment. The surface treatment of the mold is also very important. Nitriding - can enhance the surface hardness of steel, effectively extending the life of the mold. Plating - can effectively modify the mold steel, for some need high brightness and corrosion-resistant plastic parts can use plating to enhance and improve the performance of steel.
2. Structure design
Mature mold structure not only consider the product material properties - shrinkage, molding temperature, elastic tensile deformation coefficient, but also take into account the cooling water, the speed of mold open and close. Reasonable mold structure can effectively extend the life of the mold and ensure the smooth production of mold. Improve efficiency and reduce costs.
3. Mold processing
Mold processing arrangements are particularly important, reasonable process arrangements can speed up the production cycle, shorten the processing time, saving cost effectively. And more importantly, accurate and reasonable processing to ensure that the mold in the production process stability and extended life. Processing errors will lead to mold welding, no matter how good the welding, it is a loss to the mold; another poor processing may also affect the mold action, reduce mould life, resulting in mold in the production process of cracking even broken.