Product Introduction:
Continuous Loss-in-Weight Feeder, short for Loss-in-weight Feeder, is a continuous feeding device to measure the material flow by the decrease rate of material in unit time. As measuring flow rate in an approximately static weighing method, it is simple, high precision and practical. It is widely used in power, pharmaceutical, food, chemicals and building materials industries as the measurement equipment for powder material, granule material and bulk material, giving precise measurement and continuous feeding control to the various components of the material.
The control system adopts PLC + HMI or intelligent instrument which is very easy to operate and is stable and reliable. It can display state of the feeder and also have friendly human-computer interaction interface.
Main Technical Parameters
Ambient Temperature: -20℃～100℃
Working Voltage: AC380V 50Hz
Weighing Accuracy: ±0.25%
Material Moisture: ≤2%
Feeding Speed:　0.03t/h～300t/h
Communication Interface: RS485, Mod-bus
Structure Features:
1、The loss-in-weight feeder is composed of fast filling device, inlet and outlet, flexible connection, weighing bin, load cell, mixing device and screw conveyor.
2、Fast filling device: pneumatic butterfly valve is used as the connection of material bin and weighing bin. The weighing bin will be filled completely in a short time when it needs filling. The pneumatic butterfly valve is in a small volume and compact construction but responds quickly, leak proof and easy to use, practical and reliable.
3、Weighing bin: the weighing bin is designed for weighing and able to prevent bridge and material impact and also ensure smooth and well-distributed feeding; meanwhile, it is easy to dismantle during cleaning and replacing of some parts and components. The volume of the material bin depends on the feeding capacity.
4、Load cell: three highly précised sensors are mounted on the weighing bin and distributed at 120℃ ensuring the weighing accuracy .
5、Mixing device: to prevent bridging and ensure smooth and well-distributed feeding, its main structure is that add mixing activation device on top of the weighing bin with horizontal motor and reducer inside to drive vanes for mixing.
6、Screw Conveyor: high accuracy screw is used, allowing a small spacing between the screw and shell after precision processing, thus ensuring high weighing and measuring precision and stable feeding. The connection between motor and the screw is compact and simple which reduces the transitional steps so as to ensure high weighing accuracy.
Function Features:
1、simple and reliable structure efficiently prevent material impact during feeding and ensure excellent material flow inside the storage bin and short re-feeding time and also ensure transmission system operate well and in good linear;
2、Suitable Material: non-cohesive powder and solid granule;
3、Accurate continuous feeding;
4、Full discharge without residue, easy and simple to clean;
5、Easy to install and operate;
6、High feeding precision;
7、Measuring control range is wide;
8、The control system can be PLC control or dynamic control instrument, which can set flow rate and operation mode, indicate total accumulation, instantaneous flow rate and output as well as other parameters, control the whole process of feeding and discharge and also indicate working state and alarm;
9、The control system is in modular design and can be connected to upper computer, PLC or DCS through the instrument and communication interface. It is very stable and reliable.