Ideal for cost reduction! Easy to change cut dimensions and hole processing! Large-scale molding is possible!
Vacuum forming is a molding method that applies atmospheric pressure to sheet (resin sheet) molding. The sheet (resin sheet) is softened using a heater, and by creating a vacuum in the space (gap) between the softened sheet (resin sheet) and the raised molding die, the sheet (resin sheet) is made to adhere closely to the mold, resulting in the desired shape.
In vacuum forming, the internal dimensions (inner dimensions) of the basic molded product serve as the reference dimensions, and molding is done using a male mold (positive mold). In this case, there are no mold marks on the product surface (outside of the mold). However, the product's form will have a softer and more textured finish due to the thickness of the sheet.
In contrast, if a sharper molding expression similar to injection molding is desired, pressure forming, which applies a pressure greater than atmospheric pressure, is effective. Molding is done using a female mold (negative mold), allowing for accurate external dimensions (outer dimensions) of the molded product. However, in this case, the mold will touch the product surface, so mold marks cannot be avoided.
We address mold marks with treatments such as blasting. Additionally, undercuts can also be molded.
