Mold inspection and acceptance
A: Purpose
To ensure that the mold can produce qualified products, put into production normally, ensure the service life of the mold production, and meet the production and use requirements of the product design. The standard recognizes the mold standards from aspects such as product quality, mold structure, and injection molding process requirements, and evaluates the mold quality based on this. Through training, you can understand the mold trial process and precautions of plastic molds.
B: Steps
1. First, familiarize yourself with the mold trial process and key precautions during the mold trial process by understanding the following materials.
2. Understand the actual mold trial process by practicing at the mold trial site.
3. Inspect the mold appearance, mold material, pouring system, mold support, reset, core extraction, removal, exhaust, water transport system, injection molding system,
product appearance, size, and functional coordination for acceptance
C: As the mold acceptance party, things that should be clarified before and during the mold trial.
Before mold trial:
(1) During the mold design stage: During technical communication with the mold manufacturer, confirm the applicable machine of the mold, production capacity requirements, and whether automatic production is used Mold life requirements, product material shrinkage setting, mold structure (determined by the mold glue feeding method), PL line design.
For important appearance parts, the mold manufacturer is also required to conduct mold flow analysis to better foresee possible defects in the mold during production and conduct evaluation.
(2) After the mold is manufactured, before the first mold trial
Confirm whether the mold has enhanced protection devices (such as whether there is a forced retreat mechanism, or a ejector plate limit switch mechanism, these mechanisms are devices that ensure that the mold will not be damaged in an abnormal state)
Confirm whether the mold ejection and retreat mechanisms are installed
Common ejection and retreat mechanisms include tie rod mechanisms (whether the tie rods are balanced and whether the number of tie rods is sufficient must be confirmed) and cylinder mechanisms. Sometimes there will be gas-assisted ejection assistance, and whether the sprue needle is made into a Z shape to hold the cold material position (it was found that the sprue often sticks to the mold during production in the sixth workshop) *The end face of the return rod is flat and there is no spot welding. There is no gasket at the bottom of the embryo head, spot welding.
All molds that make sliders should have oil grooves at the movable part of the slider.
