Cosmetic Bottle Blow Molding Machine

Hourly output depends on the molding cycle, number of cavities or die heads, bottle size, cooling time, and reject rate. A useful estimate is: good bottles per hour = 3,600 ÷ cycle time in seconds × bottles produced per cycle × good-product rate. For example, a 10-second cycle producing 2 bottles per cycle at a 95% good-product rate yields approximately 684 good bottles per hour. Ask the manufacturer to validate the estimate using your actual bottle design.

MEPER's MP-D series product information lists PE, PP, PVC, and PA as processable materials, while material options for other models should be checked against their individual specifications. Do not assume that a machine suitable for PE shampoo bottles can also process PET cosmetic bottles. Before ordering, identify the exact resin grade and confirm processing compatibility, bottle-wall requirements, and whether the selected extrusion system and mold are suitable for that material.

For 100 ml–500 ml shampoo, lotion, or body wash bottles, choose a machine according to the plastic material, bottle dimensions, neck finish, mold compatibility, and required production rate. PE and PP bottles are commonly considered for extrusion blow molding, while PET bottles often require a different process, such as injection stretch blow molding. MEPER lists the MP-55D with a maximum container capacity of 2 L, but this maximum does not automatically confirm suitability for every small cosmetic bottle. Provide the manufacturer with your bottle drawings, material, neck dimensions, and target hourly output before selecting a model.

Extrusion blow molding forms a molten plastic tube that is inflated inside a mold and is commonly suitable for hollow PE or PP containers such as shampoo and body wash bottles. Injection blow molding first forms a preform around a core rod and then blows it into the final shape; it can offer better control of the neck finish for suitable small containers. The best process depends on the resin, bottle geometry, neck precision, production volume, and tooling budget. Compare mold and equipment costs using the same bottle specification, and consider injection stretch blow molding separately if your packaging requires PET.

Uneven wall thickness can result from inconsistent parison programming, unsuitable melt temperature, poor mold alignment, uneven cooling, or a bottle design that distributes material unevenly. Start by checking temperature stability and parison thickness settings, then inspect mold alignment and cooling conditions. During a trial run, measure wall thickness at several points, such as the shoulder, body, and base, and compare the results with your product specification. Test at least 30 consecutive bottles as an initial screening sample, while recognizing that a larger sample may be needed to validate long-run process stability; agree on the acceptable thickness variation with the manufacturer before mass production.