Protective device for an injection unit to guard against injury
AssigneeKrauss-Maffei Kunststofftechnik GmbH
InventorsGünther Grimm, Friedrich Staudacher
Life of this patent
Estimating the term…
Abstract
A protective device for an injection unit of an injection molding machine includes a protective plate which is disposed at an outlet port of a channel of an injection nozzle. The protective plate is moveable between a shielding position, in which the outlet port is covered, and an opening position, in which the outlet port is cleared. Moving the protective plate between the shielding and opening positions is a mechanical switching mechanism which is disposed outside the channel and applies an adjusting force which acts between the protective plate and a molding tool, when the injection unit docks on the molding tool.
Claims19
A protective device for an injection unit of an injection molding machine, comprising:
- a proctive plate disposed at an outlet port of an nozzle channel of an injection nozzle and moveable between a shielding position, in which the outlet port is covered, and an opening position, in which the outlet port is cleared;
- and
- a mechanical switching mechanism, disposed outside the injection channel, for applying an adjusting force on the protective plate to move the protective plate from the shielding position to the opening position, when the injection unit docks with a molding tool.
An injection molding machine, comprising:
- a molding tool;
- an injection unit having a plasticizing cylinder for producing a plastic melt, and a nozzle connected to the plasticizing cylinder and having a nozzle channel for expelling the plastic melt into a cavity of the molding tool;
- and
- a protective device for guarding against splashing of plastic melt, said protective device including a protective plate disposed at an outlet port of the nozzle channel and moveable between a shielding position, in which the outlet port is covered, and an opening position, in which the outlet port is cleared, and a mechanical switching mechanism, disposed outside the nozzle channel and rendered operative to move the protective plate between the shielding and opening positions in response to the injection unit touching the molding tool.
Dependencies are inferred from the claim text.