There are many types of molds, including household prod […]
There are many types of molds, including household product mould, table mould, air cooler mould, etc. So what should be paid attention to when designing and manufacturing molds?
⑴The shape of the plastic part and the design of the wall thickness should be considered to facilitate the smooth flow of the material to fill the cavity, and try to avoid sharp corners and gaps.
⑵The draft angle should be large, 1°～2° for 15% glass fiber, 2°～3° for 30% glass fiber. When the demolding slope is not allowed, forced demolding should be avoided, and a horizontal parting structure should be adopted.
⑶ The pouring system section should be large, and the flow should be straight and short to facilitate uniform fiber dispersion.
⑷The design of the feed inlet should consider preventing insufficient filling, anisotropic deformation, uneven distribution of glass fibers, and easy to produce weld marks and other adverse consequences. The feed port should be thin, wide and thin, fan-shaped, ring-shaped and multi-point feed ports to make the material flow turbulent, and the glass fiber is evenly dispersed to reduce anisotropy. It is best not to use needle-shaped feed ports. The cross section of the mouth can be increased appropriately, and its length should be short.
⑸The mold core and cavity should have sufficient rigidity and strength.
⑹The mold should be hardened, polished, and wear-resistant steel should be selected, and the easily worn parts should be easy to repair and replace.
⑺ The ejection should be even and strong, easy to replace and repair.
⑻The mold should be equipped with an exhaust overflow groove, and it should be located at a location prone to weld marks.
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