What is Thermoforming Technology?
Thermoforming is a plastic processing technique where flat plastic sheets are heated until they become soft and then vacuum-formed over molds. After cooling and shaping, these products find wide applications in various industries such as daily commodities, plastic packaging, lighting, advertising, decoration, cosmetics, and hardware.
Thermoforming Packaging:
Thermoforming packaging refers to the production of plastic products using thermoforming technology, followed by sealing and packaging using specific equipment. Thermoforming packaging products include blister shells, trays, and vacuum-formed shells.
Thermoforming Paper Card Packaging:
Material Preparation and Order Confirmation: After receiving an order, the factory prepares materials based on customer requirements, with common materials being PET and PVC.
Design Confirmation and Ink Printing: The factory confirms order details with the customer and either receives design drafts from the customer or creates designs according to the customer's specifications. The design is then printed on PET or PVC sheets. Currently, this process involves automatic or semi-automatic printing. Each color is printed separately; hence, more colors increase production time and costs. Cleaning the machinery, reinking, and setting up each color require time and ink, which contribute to the overall expenses.
Thermoforming: The designed flat PVC sheet is placed onto the thermoforming machine for shaping. The machine heats the material, molds it into the shape using the mold, and then cools it down. The precision and quality of the mold are crucial factors in the thermoforming process. Typically, molds are made of copper or aluminum. Copper molds consist of gypsum inside and copper outside, while aluminum molds are entirely made of aluminum. Aluminum molds are more expensive but offer advantages like smooth surfaces and well-defined edges, providing a higher-quality finish. An aluminum mold can cost hundreds of thousands of dollars.
Trimming: After thermoforming, there are excess materials around the edges that need to be trimmed. Machines equipped with programmed robotic arms are used for cutting off the excess material and potentially punching holes. After the machine completes the cutting, manual inspection is necessary to remove any remaining burrs and polish the sharp edges.
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