Adhesion/bonding of different raw materials, product structure design, injection molding parameters, etc.

The characteristic of soft plastic over-molding products is that there are more than one material and color combinations in the product. Common over-molded products include soft plastic over molding with hard plastic; plastic over molding with metal; three layer over molding, soft plastic on the first layer, hard plastic on the second, metal insert or steel wire inside.

Not all products require MF(Mold Flow Analysis).

Generally, Mold Flow analysis is performed only when the products are complex, and the dimension tolerance requirements are high. It is usually performed simultaneously with DFM(Design For Manufacture and Assembly).

Moldflow analysis.

Design for manufacturability.

Tolerances nclude dimensional tolerance, shape tolerance, position tolerance, etc.

① Dimensional tolerance. Refers to the amount of change in the allowable size, which is equal to the absolute value of the algebraic difference between the maximum limit size and the minimum limit size.

② From tolerance. Refers to the total amount of change allowed for the form of a single actual element, including six items: straightness, flatness, roundness, cylindricity, line profile, and surface profile.

③ Position tolerance. Refers to the total amount of change allowed for the position of the associated actual element to the reference. It limits the relative positional relationship between two or more points, lines, and surfaces of a part, including eight items: parallelism, verticality, inclination, coaxiality, symmetry, position, circular runout, and total runout. Tolerances indicate the manufacturing accuracy requirements of parts and reflect the difficulty of their processing.