Six factors affect the effect of blow molding
In the plastics industry, in order to save costs, many companies will consider hollow products to be blown by the blow molding process, so that the cost will be greatly reduced compared with injection molding, so the blow molding process has also been rapidly developed. Blow molded products are also widely used, such as the packaging industry, the toy industry, the electrical industry and other industries.
The location of the mold separation (mold line), product slope, product layout, blow ratio, fillet, and decorative appearance involved in the blow molding process are factors that mold engineers and blow molding engineers must consider. The specific analysis is as follows:
1. The position of the mold line. Before opening the mold, the mold engineer needs to carefully consider how to divide the mold, which will affect the appearance of the subsequent products and the appearance of the product;
2. Product slope. All surfaces parallel to the moving direction of the mold should have a certain inclination, wherein the inclination is such that the mold can be easily opened to facilitate the removal of the product;
3. Check all usage features. When used as a product, the fewer parts, the less the assembly work, the better, because the cost of the product can be reduced;
4. Inflating ratio. Inflating, pay attention to the area that causes the extremely thin wall thickness of the geometrical shape. These places may be convex or concave parts. When the ratio of width to depth is too large, it can assist vacuum forming;
5. Radius principle. Avoid sharp edges, corners, sudden changes in surface, sudden changes in product diameter or wall thickness;
6. The position of the insert, venting, inlet needle, pin hole, lettering and label must be carefully considered.
It can be seen from the above that whether it is a small blow molding product or a large blow molding product, the energy and time required for development must be indispensable, and the factors that will affect the blow molding effect must be carefully considered. In order to match the appearance and function of each blow molding product.
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