Drawbar type injection molding machine machinery protection device

Abstract

The invention relates to a drawbar type injection molding machine machinery protection device comprising a machinery protection bar, an access stopping plate, and a roller. One end of the machinery protection bar is fixedly connected with a mobile template, and the other end of the machinery protection bar penetrates a fixed template. The machinery protection bar is provided with a plurality of recesses at the contact surface with the access stopping plate. The access stopping plate is arranged on the fixed template at the side facing the mobile template through a pin. The thickness of the access stopping template is corresponding to the recesses. The access stopping plate is manufactured by welded components of a baffle plate and a supporting rod. A roller is arranged on an outer end of the supporting rod. The access stopping plate rotates through the pin. A positioning apparatus of the access stopping plate is arranged on the fixed template. During the process of mold opening and clamping, the access stopping plate is in a screwing state. When mold opening is perfectly finished, the access stopping plate falls into the recesses of the machinery protection bar, such that the access stopping plate prevents the mobile template from performing mold clamping, and a safety protection function is realized. The drawbar type injection molding machine machinery protection device provided by the invention is advantaged in simple structure, good firmness, and safe and reliable application.

Description

technical field [0001] The invention relates to a mechanical protection device, in particular to a mechanical protection device for a pull rod type injection molding machine. Background technique [0002] The development of the machinery industry has made the requirements for safety precautions higher and higher. And because injection molding machine operators use the equipment for a long time, safety is particularly important. For this, safety standards have been formulated in various countries. [0003] With safety-certified injection molding machines, the probability of safety accidents has been greatly reduced. However, in the application of domestic injection molding machines, safety accidents still happen occasionally. When the injection molding machine operates abnormally, it can be blocked by mechanical devices in time and effectively for safety protection. Under normal circumstances, when the front safety door is closed, the mechanical lock baffle is pressed by th...

AI Technical Summary

Problems solved by technology

[0004] However, in practical application, there are the following hidden dangers: the stopper is stuck and does not enter the block; the stopper is lost; when the stopper rod is a half tooth type, when the stopper rod rotates abnormally, the effective blocking area will become smaller and the protection will fail; When the baffle is a full-toothed baffle, after the mold is opened in place, the baffle falls on the top of the baffle or the part without teeth, resulting in protection failure; when the baffle adopts a toothless polished rod (mostly used in early injection molding machines) After the mold is opened in place, the baffle falls on the polished rod or the position of the baffle is too far away from the baffle, resulting in the failure of the protection. This requires that after each mold change, the effective length of the baffle needs to be adjusted to ensure that the baffle and the baffle The rod forms an effective barrier, so it is time-consuming and labor-intensive, and the practicability is poor

The above hidden dangers can cause the mechanical lock to be in a state of failure during use.

At present, there is a mechanical protection device that uses electromagnetic induction to control the rotation of the baffle. This device has a complex structure, troublesome installation, poor firmness, and is prone to defects such as control failure.

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