How To Solve The Problem Of Poor Modified Plastic Coating Of Rotational Molded Products?

Rotational molding products generally have metal inserts. During rotational molding, the insert is equivalent to a part of the mold shell, which increases the wall thickness of the mold shell here. The end of the insert will not get the same temperature as the mold, causing the insert to be The epoxy resin coating on the parts is not good, and large inserts are more likely to be coated unevenly.

How to solve the problem of poor coating of modified engineering plastics in rotational molded products?

1. Eliminate the factors that are unfavorable to the heat conduction of the insert, so that the embedded metal product has an excellent heat transfer structure.

2. Under the premise of considering the rotational molding conditions and the strength requirements of the insert, the insert should be as small as possible relative to the surface height and volume of the product.

3. The depth and width of the anti-rotation and anti-pull grooves on the insert must comply with the rotational molding requirements.

4. When rotomolding, preheat the inserts according to actual conditions, so as to achieve good results, which is more suitable for rotomolded products with large and medium-sized inserts.

At present, most orders for rotational molding products from overseas directly indicate the use of linear density low-pressure polyethylene (LLDPE) rotational molding profiles for rotational molding. The products are mostly different products with higher requirements for rotational molding technology. Specifications of cleaning equipment casings, lawn mower casings, shipping boxes, storage boxes, various mechanical automated packaging wooden boxes, two-layer insulated boxes with polyurethane foam layers inside, automobile parts, etc. my country's rotational molding technology and rotational mold manufacturing technology are rapidly improving, but there are still differences compared with European and American countries in the rotational molding product design stage.

The rotational molding process plays a very important role in product quality. After the product is designed and the stamping mold is manufactured, the mold design that is likely to cause product defects is generally not easy to change casually. It is more important to find ways to solve the defects of rotational molded products from the forming process.