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Quality requirements for suction

Date:2016-10-25 Browse:

Wire drawing: some undesirable line protrusions (not on the moulds) produced during the process of plastic molding, and we need to re modify the mold (reduce height and increase the slipping of the park) and increase the additional pressure mold (we call it the upper die) to solve it. When the line is too large, it is regarded as a defective product and cannot be used for high-grade plastic packaging. However, in the field of spare parts turnover, as long as the lines are arranged neatly and not affect the use function, they should be regarded as qualified products. The drawing line is also called the pull.
Scratches: there are scratches on the finished products, especially the transparent bubble shells. If the marks are too long and too large, the shells will become inferior products, which can not be used for high-grade packaging.
Crystal point: in the process of blister sheet production, it is a transparent defect produced on the heated plastic material due to the small dust in the air, especially in the process of transparent blister sheet, which is regarded as a defective product if the defect is too large or too large.
Bubble: in the process of blister sheet production, because the heated plastic material contains air, the finished product sheet has bubbles, especially in transparent plastic sheet production. When the bubble is too large or too much, it is regarded as a defective product.
Water ripple: in the process of blister sheet production, due to the different material and processing technology, the surface of finished sheet has surface corrugation, especially in the process of transparent plastic sheet production. When the water ripple is too large or too much, it is regarded as a defective product. In general, the thicker the sheet is, the more obvious the wave pattern is. Water ripples are rarely found in qualified PET materials, but most of the PVC have water ripples.