In order to ensure the quality of the company's square barrels, our company will do the following experiments in each production.
First of all, the square barrel must pay attention to the following problems in the design and production process: inflation, elongation, vertical load strength, container rigidity, bearing surface, mouth thread, shape and outer surface and molding, temperature, pressure, etc. In order to ensure the mechanical properties, formability, mold structure and processing rationality of the square barrel and the conditions of use of the container. The process flow is: mixing→screw extrusion→clamping→blow molding→opening→cooling→trimming→inspection.
Second, the performance test of the square barrel. The open square bucket shall be subjected to vertical impact drop test, stacking test and sealing test. Closed square barrels shall be subjected to vertical impact drop test, stacking test, airtight test and hydraulic test. The square bucket of the mounting handle and the integral handle also needs to be tested for suspension.
In appearance, the wall thickness ratio of the symmetrical part of the barrel is not more than 2:1, no blisters, no plasticization, the outer wall and mouth are smooth and smooth, no more than 2 bubbles with a diameter of not more than 2mm, and the black spot impurity length is not More than 4mm, the barrel mouth parts are closely combined and the interchangeability is good.
When the square barrel is subjected to the vertical impact drop test, the sample is carried out at -18 °C. Drop height: If the water is used as a substitute, the density of the product to be installed is not more than 1.2, which is 0.8m; the height of the product to be loaded with a density of more than 1.2 is 0.67m × density.https://www.fhpails.com/