Plastic injection molding of plastic parts in the inner and outer surfaces along the parting direction, slope should be designed to facilitate the ejection ejection enough, otherwise difficult or ejection occurs when ejection pull bad bruise plastic parts.
Used the slope of the value of 1 ~ 1.5 °, can also be as small as 0.5 °. When there are special requirements, the gradient can use the outer surface of the 5 ', the inner surface 10' to 20 '. When the height of small plastic parts, it can not allow the design of slope.
Parts or ribs on the convex side should be 4 ~ 5 ° slope; parts there are several holes along the parting direction or rectangular lattice leaving ejection resistance increased, suitably 4 to 5 ° slope; wall pattern with the leather should have 4 ~ 6 ° of the stripping slope.
In general, if the slope does not prevent the use of products, you can take a large number of slope values.
Sometimes in order to make parts in the mold when the mold to remain in positive or negative on the mold, will deliberately reduce the slope of the edge, or increase the angle of the rim.
A slope value of the size tolerances can be within the tolerance parts can also be within the tolerance range.
Pressing the depth of the larger products, the only requirement of yin and yang must have sufficient slope model, but also to maximize the positive mode is greater than the slope of the slope of negative mode, so that the lower parts than the upper side wall thickness thick. In the die closed, the wedge effect of the density of the upper parts will be guaranteed.
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