A sling pad system to be disposed between a missile and a launch tube is provided herein. The sling pad system includes an outer sheet and an inner sheet spaced from the outer sheet. A resilient structure is positioned between the outer sheet and the inner sheet. The resilient structure includes one or more structural elements operably coupled with the outer sheet at a first contact point and the inner sheet at a second contact point. A support is operably coupled with the inner sheet.

An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).