Cosmetic packaging mold is a special mold. The requirements for cosmetic packaging bottles and caps are exquisite and beautiful appearance, unique feel and texture, and exquisite design. Cosmetic cream bottle caps are the most widely used in cosmetic packaging.

The cosmetic cream bottle cap is specifically reflected in the mold design. There are many things that need to be paid attention to. First of all, in terms of the appearance of the plastic part, no small gate marks are allowed on the outer surface of the plastic part. The gate is generally designed on the back of the product, or on the inner surface of the bottle cap, covered by a gasket or other parts. The decorative ribs, LOGO and other specific decorative features of the appearance must be beautiful. The appearance of the etching is uniform, and the polished surface has no defects such as reflective ripples. The difference in the segment of the parting surface clip line of the appearance must be controlled below 0.03mm. The sharp angle must be clear, and the arc R of the corner must be uniform and consistent. During injection molding, there should be strict control standards for black spots and other defects on the appearance of plastic parts.

Most cosmetic cream bottles are round, and some are deformed designs based on the round shape. Another feature of plastic parts is that they are small in size and most have internal threads. Multi-threads are often used inside cosmetic cream bottles, which have the advantage of fast opening and closing speed, and can be tightened or unscrewed without more than 2 turns. Material selection: In order to pursue the texture of plastic parts, sometimes the wall thickness of the plastic parts is thicker.

The market demand for cosmetic cream bottle caps is huge and the production batch is huge, so the mold design is generally a multi-cavity mold. Under current technical conditions, the number of cavities ranges from 2 to 124.

Another feature of the cosmetic cream bottle cap mold is that since the plastic part is a small-diameter round product, the cavity is a single circular cavity inlay. In order to increase the life of the mold, the cavity material needs to be heat treated to HRC50 or above. For multi-cavity molds, the processing accuracy of the cavity is improved, and the dimensional tolerance of each cavity is controlled within 0.015 to ensure the interchangeability of the cavity. The processing accuracy of the mold base also needs to be improved, and the center distance tolerance between each cavity is controlled within ±0.015.