Mechanical lock for safety door of injection molding machine

Abstract

A mechanical lock for a safety door of an injection molding machine comprises a controller and a mechanical lock body, wherein the mechanical lock body comprises a ram head, a travel switch, a mechanical lock guide plate, a mechanical lock bottom plate and a spring, the ram head is fixed to the mechanical lock guide plate which is glidingly connected with the mechanical lock bottom plate, a connector is arranged between the mechanical lock guide plate and the mechanical lock bottom plate and is sleeved with the spring, and two ends of the spring are limited by the mechanical lock guide plate and the mechanical lock bottom plate; the travel switch is arranged on the travel of the mechanical lock guide plate and is fixed to the mechanical lock bottom plate. When the mechanical lock guide plate moves downwards and triggers the travel switch, the controller receives a control signal to control the safety door to move, and the safety door enters the mechanical lock guide plate to limit the ram head, so that the mechanical lock guide plate can keep triggering the travel switch; when the safety door moves away, the mechanical lock guide plate is separated from the travel switch, the controller receives a control signal to control the injection molding machine to stop die closing. The mechanical lock is more reliable in structure and safer.

Description

technical field [0001] The invention relates to a protection device on the safety door of an injection molding machine. Background technique [0002] The existing mechanical lock for the safety door of injection molding machine comprises a bumper on the safety door, a travel switch on the mechanical lock device, a mechanical lock handle, a rotating shaft and a rotating plate. When it is necessary to close the mold, turn the mechanical lock handle to drive the rotating shaft and the rotating plate to rotate. When the rotating plate rotates to a certain angle, it will trigger the travel switch on the mechanical lock device. When the controller detects this signal, it will press the preset The predetermined program allows the safety door to be closed, and the mold clamping action can be started after the safety door is closed; when the door needs to be opened to pick up objects, the safety door is opened, the rotating plate on the mechanical lock falls under the action of gravi...

AI Technical Summary

Problems solved by technology

The rotating plate in the mechanical lock for the safety door of the injection molding machine must be lowered by its own weight, and the rotating plate may be stuck, which is not very reliable.

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