What are the advantages and disadvantages of thick-sheet thermoforming?

Release Date:

2022-10-19

  Thick-sheet thermoforming automation is particularly well-suited for the mass production and processing of products, enabling full-process automation from raw materials to finished goods. It delivers high efficiency and consistent quality; however, it is constrained by machine dimensions and can only accommodate products within specified size ranges. Next, let’s take a closer look. Thick-sheet thermoforming What are the advantages and disadvantages?

  

 Large-thickness blister packaging


  Advantages of thick-sheet thermoforming:

  I. Thick-sheet thermoforming Thermoforming offers significant engineering and economic advantages; in the packaging manufacturing industry, unless corrugated cardboard is used as the packaging material, thick‑sheet blister thermoforming cannot match the performance of other processing methods. The primary benefit of thick‑sheet blister thermoforming lies in its cost‑effectiveness. For products made from composite sheets, foamed sheets, or printed sheets, tooling changes can be implemented to adapt the thermoforming equipment, rather than requiring modifications to the machine itself. Thin‑walled parts can be produced using high‑melt‑index, thin‑gauge sheets, whereas injection‑molded parts of the same wall thickness require low‑melt‑index pellets. For small batch runs, the favorable tooling costs represent another advantage of thick‑sheet blister thermoforming; for large‑volume production, the ability to achieve extremely thin wall thicknesses and the high throughput of thick‑sheet thermoforming are particularly advantageous.

  II. Material Selection for Thick-Panel Thermoforming The thick-panel thermoforming process can produce small items such as tablet packaging materials or watch batteries, as well as very large products, like garden ponds measuring 3 to 5 meters in length. The thickness of the forming material can range from 0.05 to 15 mm; for foamed materials, it can reach up to 60 mm. Any thermoplastic or material with similar properties is suitable for thermoforming.

  III. In the production of thick‑sheet thermoforming, sheet material must be cut, generating edge and corner scrap. After this scrap is crushed, it can be blended with virgin raw materials to produce new thin sheets. In recent years, the recovery and reuse of such edge and corner waste in thick‑sheet thermoforming has become increasingly important. At present, the process involves crushing the scrap and mixing it with virgin material for recycling, thereby establishing a standardized procedure. Waste plastic molded products—ranging from packaging materials to engineering components—can often be recycled under suitable conditions; however, further advancements are still needed in some cases. Currently, recycling primarily focuses on certain chemical and energy‑intensive materials. To achieve breakthroughs in recycling, efforts must be directed toward enhancing the ecological sustainability and resource efficiency of the manufacturing process.

  Disadvantages of thick-sheet thermoforming

  1. In thermoforming, only one surface is in contact with the mold; consequently, only that surface conforms to the mold’s geometric dimensions, while the contour of the other surface must be achieved through stretching.

  II. High Costs Thick-sheet thermoforming The materials used in the process are sheets with thicknesses ranging from 0.05 to 15 mm; these sheets are semi-finished products manufactured from pellets or powders. Consequently, compared with injection molding, thermoforming of thick sheets requires additional raw material costs.

  The above outlines the advantages and disadvantages of thick-sheet thermoforming. For more information, please feel free to contact us!


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