... ABS plastic shell,vacuum forming,abs plastic shell I. What's vacuum forming? Vacuum forming is a process in which a thermoplastic sheet ... GOOD QUALITY FITTING. II. Vacuum Forming Machined process: 1. Plastic sheet board:ABS, HIPS, PP, PE, PC, PMMA resin granules are extruded ... or co-extruded into thermoplastic sheet or plate that textured, smooth, ...