In the plastic industry, many enterprises in order to save costs, most of the hollow products will be considered blow molding process, so compared to the injection, the cost will be greatly reduced, so the blow molding method has also been rapid development.
Blow molding products are also widely used, for example, the toy industry, the packaging industry, the electrical industry and other industries. The location of mold separation (mold clamping line) involved in the blow molding process, product inclination, product layout, blowing Expansion ratio, fillet, modified appearance and other factors are mold engineers and blow molding engineers must consider.
Specific analysis is as follows:
1. Clamping line position
Before opening a mold, the mold engineer needs to carefully consider how to divide the mold, which will affect the follow-up product appearance and the appearance of the product.
2. Product slope
Parallel to the direction of the mold to move all the surfaces to have a certain slope, which should make the mold easy to open the mold easy to remove the product is appropriate;
3. Check all usage features
When used as a product, the fewer parts and components, the less assembly work, the better, because it can reduce product costs;
4 blow up ratio
Inflation, pay attention to cause very thin wall geometry, these areas may be convex or concave parts, the ratio of width and depth can be assisted by vacuum forming;
5. Radius principle
Avoid sharp edges, corners, sudden surface changes, sudden changes in product diameter or wall thickness;
Other
Inserts, vent slots, inlet pins, pin holes, lettering, and label locations must be carefully considered.
In summary, whether it is a small blow molding products, or large blow molding products, the development effort required before the time and investment are not less, we must carefully consider the factors that will affect the blow molding effect, Can we make every blow molding product match the appearance and function well.