How To Solve The Problem Of Poor Coating Of Modified Plastics In Rotomolded Products?
There are usually metal inlays on roto-molded products. During roto-molding, the inlay is equivalent to a part of the mold, which increases the wall thickness of the mold here. It is not easy for the end of the inlay to obtain the same temperature as the mold, resulting in poor resin coating on the inlay, and large inlays are more likely to be unevenly coated.
How to solve the poor coating of modified plastics in roto-molded products?
1. Eliminate factors that are not conducive to heat transfer of inlays, so that inlaid metal parts have a good heat transfer structure.
2. Under the premise of meeting the roto-molding conditions and the strength requirements of inlays, the height and volume of the inlay relative to the surface of the product are as small as possible.
3. The depth and width of the anti-rotation and anti-pull grooves on the inlay are suitable for roto-molding requirements.
4. During roto-molding, preheat the inlay according to the actual situation, so as to achieve good results, which is more suitable for roto-molded products with large inlays.
At present, most orders for roto-molded products from abroad directly indicate that linear low-density polyethylene (LLDPE) roto-molding special materials are used for roto-molding. Most of the products are cleaning machine housings of different specifications, lawn mower housings, cargo transport boxes, storage boxes, various mechanical and electronic packaging boxes, double-layer insulation boxes with foam layers inside, auto parts, etc., which have high requirements for roto-molding technology. my country's roto-molding technology and roto-molding mold processing technology have improved rapidly, but there is still a gap in roto-molding product design compared with Europe and the United States.
Roto-molding technology plays a very important role in product quality. After the product design and mold design and manufacturing are completed, the mold structure that is prone to product defects is usually not easily changed. It is more important to try to solve the defects of roto-molded products from the molding process.