A safety protection device for an open mill

Abstract

The invention relates to a safety protector for an open mill. A protective screening is arranged at the rear of the open mill; a mounting door is arranged on the protective screening; a safety bolt is mounted on the mounting door; an emergency-stop pedal switch is arranged below the open mill; a trigger point is arranged on the emergency-stop pedal switch; the emergency-stop pedal switch is connected with a limit switch A; a safety push rod is arranged in the middle of a front roller; a limit switch B is arranged behind the safety push rod and fixed to the safety push rod; a vision sensor A and a vision sensor B are arranged at the two sides above the open mill; the two sensors face to the joint position between the front roller and a rear roller; in the using process, a safety relay monitors an accessed normally closed contact, so that in the emergency circumstances, the personal safety of an operator can be ensured; when the vision sensors detect the situation that in the sizing material extrusion area, an object different from the sizing material in color enters into the detection area, the safety protector can immediately stop the machine and give an alarm, so that the safety of staff can be guaranteed to the largest extent.

Description

technical field [0001] The invention relates to the field of household machinery, in particular to a safety protection device for an open mill. Background technique [0002] The open mill is a kind of machine in which two horizontal rollers with different rotating speeds rotate at a low speed to mix rubber materials. During the working process of the open mill, it is necessary for the operator to work on the equipment to feed materials, adjust the roller distance, and cut the rubber materials. It is carried out during operation, so there is a great potential safety hazard, especially when the operator uses the cutting knife to cut material on the front roller, if the operation is not standardized, fingers and wrists are easily involved in the roller, resulting in serious industrial accidents , in order to prevent accidents, safety devices are often installed on the mill, such as protective nets and protective doors are installed at the rotating parts such as the side and rea...

AI Technical Summary

Problems solved by technology

[0002] The open mill is a kind of machine in which two horizontal rollers with different rotating speeds rotate at a low speed to mix rubber materials. During the working process of the open mill, it is necessary for the operator to work on the equipment to feed materials, adjust the roller distance, and cut the rubber materials. It is carried out during operation, so there is a great potential safety hazard, especially when the operator uses the cutting knife to cut material on the front roller, if the operation is not standardized, fingers and wrists are easily involved in the roller, resulting in serious industrial accidents , in order to prevent accidents, safety devices are often installed on the mill, such as protective nets and protective doors are installed at the rotating parts such as the side and rear of the mill, and emergency stop kick switches, safety push rods, etc. are installed at the operating place. Safety pull ropes, etc., so that personnel can operate the emergency stop device to stop by themselves in case of danger. Although these safety protection devices can reduce personnel injuries and reduce the probability of accidents, their effects are limited, mainly because these devices require operators to be on the road. Quick response and quick operation in emergency

In addition, these safety devices often use a pair of normally open contacts and a pair of normally closed contacts. The normally open contacts control the brake action of the mill, and the normally closed contacts control the emergency stop action of the mill. , the safety device cannot operate effectively, the safety level is low, and it cannot provide a particularly safe construction environment for construction personnel when in use

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