There isn't a single machine specifically called for melting acrylic. The process and equipment used depend on the specific application. Here are some common terms and methods:

For small-scale projects and crafting:

* Heat gun: A hand-held device that uses hot air to soften acrylic sheets.

* Acrylic bender: A specialized tool that uses heat to bend acrylic sheets into various shapes.

* Hot plate: A flat surface that heats up to melt acrylic, often used for casting or creating small shapes.

For larger scale applications:

* Extruder: A machine that melts and pushes acrylic through a die to create continuous shapes like rods or tubes.

* Injection molding machine: A machine that injects molten acrylic into a mold to create precise parts.

* Vacuum forming machine: A machine that uses heat and vacuum to form acrylic sheets into desired shapes.

The best machine for melting acrylic depends on the specific project, desired outcome, and scale of production.