In order to ensure the mechanical properties, molding quality and rationality of the plastic container, the following problems must be paid attention to during the design and production process: inflation, elongation, vertical load strength, container rigidity, bearing surface, and flap Thread, shape and outer surface and molding, temperature, pressure, etc. The process flow is: mixing→screw extrusion→clamping→blow molding→opening→cooling→trimming→inspection.
For the quality requirements of plastic containers:
The first is the appearance requirement. Usually, the wall thickness ratio of the symmetrical part of the plastic barrel is not more than 2:1, and the outer wall is kept flat, no blisters, no plasticization, the barrel parts are closely overlapped, and the interchangeability is good.
Secondly, for the performance requirements, it is necessary to carry out some performance tests on the plastic container, including vertical impact drop test, stacking test, and sealing test. The closed plastic container shall be subjected to vertical impact drop test, stacking test, airtight test and hydraulic test. Containers with mounting handles and integral handles are also subject to suspension testing.