Classification, Working Principle and Attention Points of Common Vacuum Hopper Loader

Vacuum hopper loader is used to transport raw materials of injection molding, and can automatically send feeding to injection molding machine. When charging basket of plastic central feeding system is short of materials, the signal will be sent to vacuum hopper loader, which conveys plastic raw materials to charging basket of injection molding machine by ventilation principle. When materials reach a certain amount, vacuum hopper loader will stop, and will begin to resend for lack of materials.

Vacuum hopper loader can be divided into two kinds, direct one and split one. Monomeric vacuum hopper loader uses carbon brush motor, which can be replaced when damage occurs. Split vacuum hopper loader uses independent motor, and can be used together with several loaders. Vacuum hopper loader can be used with grinder. According to service conditions, adjust bottom hole size of the grinder to support feed holes of the loader. If materials are too long, axis will be twined and go against application. Choose our plastic auxiliary machine at wholesale prices.

Ⅰ. Working principles of vacuum hopper loader

Most plastic Auto Loader uses vacuum suction mode. Its working principle is: certain negative pressure is formed within hopper cavity and then materials are inhaled into hopper. The working process of fully automatic microcomputer vacuum hopper loader is: when hopper is short of materials, contact switch for detecting materials will send signals to microcomputer, which will send a sign to make motor run and vacuumize. Materials will be inhaled when closed system reach certain vacuum degree. After suction, materials will be put into hopper, and then after certain readiness time, next cyclic process starts. When hopper is full of materials, contact switch will send a signal and then suction will stop. During this repeating process, materials will always meet equipment's demand.

Ⅱ. Application and precautions of plastic vacuum hopper loader

The host and hopper of split vacuum hopper loader are split designed, safe and convenient. The independent filtration device is easy to remove dust. Split vacuum hopper loader with suction mouth exhausting 1:3 is installed. Independent hopper loader is installed, which is small and light. It can be directly put onto drying machine or other material containers, and fulfill automatic suction. During application process, front end nozzle of suction mouth (suction gun) shall be inserted into work bin for 20-50cm. When materials run out, vacuum hopper loader sends no material alarm, and suction shall be stopped. Suction can be restarted when work bin is full of materials. If vacuum hopper loader still send alarm when materials can still be sucked, please shut down the machine and power immediately. Check if the motor is overloaded, troubleshoot and then begin suction again. Regular cleanup shall be made. First stop suction, then open filter shield, take down filter and shake gently, shake off dust and dirt, tidy it by clean cotton yarn and then install again.

During application process of vacuum hopper loader, please check if suction pipe is inserted into materials, if materials are blocked, if system is relatively closed, if hopper sealing ring and strainer sealing ring shall be replaced, and if strainer is blocked and shall be cleaned or replaced.

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