Weld mark
The weld mark is caused by the cooling of the front part of the melt resin from different directions and the incomplete fusion at the junction
Generally, it mainly affects the appearance and affects the coating and plating.In severe cases, the product strength will be affected
(especially when it comes to fiber reinforced resins.)Improvements can be made with reference to the following:
L) adjust molding conditions to improve liquidity.For example, increase resin temperature, mould temperature, injection pressure and speed
Degree, etc.
2) add an exhaust groove, and set a push rod at the place where the weld mark is generated.
3) minimize the use of demodulators.
4) the process overflow is set up and used as the place where welding mark is generated. After the forming, it is cut off and removed.
5) if only the appearance is affected, the position of the burning point can be changed to change the position of the welding mark.Or the parts produced by the welding mark shall be treated as a dark shiny surface and modified.