Injection products processing products in cracking analysis of the causes and solutions Cracking, including parts of filamentous surface cracks, micro-, white top, and cracking due to mold parts sticky, viscous flow mode caused by trauma or crisis, according to the release at the time cracking and cracking applications. There are several reasons:

1.Processing:
(1) pressure processing is too large, too fast, filling more information, injection, packing a long time, it will cause excessive stress and cracking.

(2) open-conditioning mode to prevent the rapid speed and pressure caused by strong Latin demoulding parts cracking.

(3) an appropriate increase in mold temperature, so that parts easy-to-release, due to lower temperature is expected to prevent decomposition.

(4) due to the prevention of weld marks, plastic degradation caused by low mechanical strength and the emergence of crack.

(5) the proper use of release agent, the elimination of regular attention to the model plane attached to the aerosol material, and so on.

(6) parts of residual stress can be in shape immediately after the annealing heat treatment to eliminate internal stress and reduce the generation of crack.

2.Die:
(1) to balance out the top, such as the number of mandrel, the cross-sectional area should be sufficient enough to release gradient, the cavity surface should be smooth enough, this is the only way to prevent external forces due to lead to the top of the residual stress concentration and cracking.

(2) of the structure of the parts can not be too thin, the transition should be part of the arc as far as possible the transition to avoid cusp, chamfering cause stress concentration.

(3) to minimize the use of metal insert to prevent the parts and pieces of embedded contracted with the stress caused by different rates of increase.

(4) parts of the deep end should be set up appropriate release into the pores, to prevent the formation of a vacuum suction.

(5) Road mainstream enough Ambassador gate when the curing time is not expected to release, this easy-to-release.

(6) mainstream Bush Road junction with the nozzle material should be chilled to prevent the sticky parts by dragging and dropping in on the mode set.

3.Materials:
(1) of the renewable material content is too high, resulting in parts too low strength.

(2) excessive humidity, water vapor and some plastic chemical reaction, reducing the strength arising out of cracking the top.

(3) of the material itself is not suitable for processing poor quality or the environment, pollution will be caused by cracking. 4. Machine: plastic injection molding machine to the appropriate capacity, is too small plastic inadequate has not been fully mixed and become brittle, when too much degradation.