Blister boxes, blister trays, folded blister... These blister packs are more categorized by structure or use. No matter what the structure of these plastic packaging boxes is, or what other purposes are used, in production, without exception, they first need to make a set of plastic molds. This section roughly describes the role of plastic aluminum molds.
Blister is a thermoformed industrial product, and the common point of thermoforming process is to use the mold to form. Injection molding is the same, as is plastics. The only difference between the two is that an injection molding is a closed system. The product is molded inside the mold. Blistering is an open system that is molded outside the mold. The molding process of the two is qualitatively different, but in the molding principle, the plastic box packaging and injection molding are the same, are all softened by the plastic (blister is softening film, injection molding is melting plastic material), to the plastic workpiece The shape of the structure. In the process, the shape of the melted threshing or softening film they finally become depends on the shape of the mold.
The final molding of the blister is to form a negative pressure through the mold evacuation, allowing the film to adhere to the mold, and then air-cooled by the blister. If the aluminum mold is used at this time, it can also be water-cooled by pouring water into the aluminum mold, which is not available in plastic-molded copper molds. The precision of aluminum molding is high, and each line of plastic suction is smooth, and edges and corners are beautifully transitioned. The plastic products produced from the aluminum mold are better in detail than the plastic mold produced from the copper mold.
In the current plastic production plants, the use of copper molds accounts for the majority. The reason for this is that the cost of designing and manufacturing copper molds is much lower than that of aluminum molds. In many cases, when the number of orders for customers is small, and it is not sure whether or not to turn over orders frequently, it is more practical and economical to use copper molds. Aluminum molds are the best choice for a large number of blister box production orders with high precision requirements. Whether it is from the quality of plastics produced, or in terms of production efficiency, some of the advantages of aluminum mold is that other molds can not be replaced.
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