Dealing with Mold Scaling in the Processing of Led Plastic Shells

Dealing with mold scaling in the processing of led plastic shells
In the production and processing of plastic casings, one will be confused by a difficult problem, followed by solving the scaling problem of plastic casings. Many pot friends also know some solutions about the scaling of plastic shell molds.
1. In order to solve the mold scale of the plastic shell, we need to clarify that these are the reasons. Then discuss it can cause fouling of the plastic casing. When the decomposition reactant of the raw material is injected into the plastic shell for molding, the extreme shear stress of the solution fluidity, the improper exhaust pipe and the mold fouling caused by it are often the composition of different elements, and it is difficult to find out this kind of How mold scale develops and how to prevent it, and it can take a few days for mold scale to appear.
2. If mold scaling occurs suddenly, it may be due to changes in the plastic shell in the molding standard, or due to the removal and replacement of different batches of molding raw materials. First, accurately measure the melt temperature to check whether the melt is dissolved (eg burning particles). In addition, check whether the plastic shell molding raw materials are contaminated by foreign chemicals, and whether the same raw materials should be used to eliminate environmental pollution. Double check the exhaust pipe of the plastic housing grinding tool.
3. Check the equipment in operation: Use dyed molding raw materials (except gray and black). After about 20 minutes, turn off the plastic machine and remove the nozzle and connector block. If it is disassembled together with the extruder screw, check the raw material for burning particles, study the color of the raw material, and quickly find out the source of mold fouling.
4. This technique is most suitable for smaller plastic machinery, while larger ones are screw diameter of 40mm extruder. When molding other raw materials, removing mold scale can also improve the quality of the plastic housing. This precaution also applies to the molding of hot runner systems.
5. The mold scaling of the plastic shell abrasive leads to the appearance defects of the injection molded products, especially the plastic shell with surface etching, and the surface repair of the plastic shell can be carried out according to the sandblasting machine.