User:Hengju/sandbox

Central conveying system
Systems designed for the production of plastic products in injection molding plants

The central feeding system is designed for the production of plastic products in the injection molding workshop, realizing uninterrupted unmanned continuous molding operations. The variety of raw materials and the combined use of multi-color materials can be changed according to the needs, so as to realize the automation of the coloring process. The system can regenerate and use the sprue cold material in a fully automatic manner, control all feeding equipment, and prevent the occurrence of blockage in the storage bin, and realize full automation by setting a central monitoring platform.

working principle
The central conveying systems adopts a vacuum conveying method, which transports the plastic raw materials from the storage tank to the central dehumidification drying system through a centralized pipeline system, and then conveys the dried raw materials to each injection molding machine. The central vaccum system adopts the design method of "one machine, one pipe" to ensure that the air in the whole system can transport the raw materials and prevent the dehumidified and dried raw materials from regaining moisture. At the same time, each conveying operation is stable, and there is no phenomenon of material blocking. It is used in conjunction with the central dehumidification and drying system, which can be used to clean the delivery pipeline after the dehumidification and drying cycle to ensure that there are no residual pellets in the pipeline. While avoiding the moisture regain of the raw materials, it also ensures the performance of the raw materials added to the injection molding machine. unanimous. Under the action of vacuum negative pressure, the original dust in the raw material will be filtered out through the dust filtration system, which helps to improve the quality of the molded product.

System Features
1. Efficiency: The conveyor transport system can realize the automatic supply of various raw materials to any injection molding processing equipment in multiple chambers, which can include drying treatment of raw materials, color matching treatment, and utilization of crushed recycled materials in proportion, which can implement high-level Automatic control, monitoring, etc., and can meet the 24-hour non-stop production needs.

2. Energy saving: The plastic material conveying systems is easy to operate, and only a few people can control the feeding demand of the entire injection molding factory, thereby reducing a lot of labor costs. Secondly, the raw material belt and corresponding auxiliary equipment next to the injection molding machine are reduced, and the utilization rate of space is improved. In addition, due to the adoption of the central feeding method, a lot of stand-alone equipment is correspondingly reduced, which also saves electric energy and reduces maintenance costs.

3. Personalization: The central conveying system solutions can meet different users, different workshop characteristics, and different raw material usage requirements. The optimal solution can be designed according to the actual needs.Choose Hengju Machinery to design and create the optimal design scheme of the central conveying system for you free of charge.

4. The image of a modern factory: the vacuum transfer system for pellets will minimize the pollution of raw materials and dust on injection molding production, so as to maintain a clean production workshop, and the unique centralized dust recovery system of the central feeding system makes cleaning more convenient. The environmental protection effect even reaches the standard of 100,000-class clean room operation, and reduces noise. Finally, an unmanned automated production workshop can be realized, and the image of modern factory management can be established.

system introduction
The material conveying system equipment adopts the centralized automatic control of the microcomputer, which realizes the 24-hour continuous feeding operation of the pellets. Several small microcomputers control the coloring process of each molding machine separately, with accurate measurement, uniform mixing, and flexible color change, meeting the requirements for multi-color and multi-variety products. According to the production volume of different molding machines, the feeding volume can be changed flexibly. The design of multiple feeding pipelines can ensure the diversification of main materials. The system has a variety of monitoring and protection functions, and the work is safe and reliable. The aliases of the hopper conveyor system are: centralized unloading conveyor system, automatic conveyor loading system, negative/ positive pressure pneumatic conveying system, etc.

Composition
Central console, cyclone dust collector, high-efficiency filter, fan, branch station, drying hopper, dehumidifier, material selection rack, micro-moving hopper, electric eye hopper, air shut-off valve, material shut-off valve.

Design Process
Rawmaterial→storage→measurement→drying→transportation→use The central conveying system adopts one machine, one tube, and a sealed circuit design to ensure the stable operation of the entire system, and there will be no plastic resurgence or material blocking. It is used with the central dryer (dehumidifier) system, which can make the dry air and dry the raw materials again to prevent the dried plastic from regaining moisture. At the same time, the conveying pipe is cleaned after each conveying cycle to ensure that there is no residual material in the pipe. While avoiding moisture regain of raw materials, it also ensures the consistency of raw materials added to the injection molding machine. Under the action of vacuum negative pressure, the original dust in raw materials is filtered out through the filter (dust collector) system, which is beneficial to improve product quality.

Central Control Station Features:
1. It adopts PLC and large-size 10.4-inch color man-machine interface touch panel, which is easy to understand and easy to operate;

2. Color-coded written display of various settings, operation and operation status;

3. It has the functions of evacuating and cleaning the material pipe, automatic dust cleaning and dust collection, central feeding host A and B alternately and automatically switching, and manual material selection and error prevention;

4. Add a raw material control screen to monitor the raw materials used by each molding machine, material suction, material shortage and various abnormal phenomena of the central host (motor).

Features of Puda central feeding host:
1. The design of the motor does not stop, so as to avoid the frequent start of the motor and cause wear and tear;

2. A safety relief valve is attached. When the main machine’s movement pressure is too high, the safety setting value is overloaded, and the pressure relief valve automatically releases pressure to protect the motor;

3. The two feeding hosts A and B alternately, and there is an automatic switching valve design to ensure the stability of raw material delivery.

Features of automatic reverse cyclone dust collector:
1. The air filter and cyclone dust collector are integrated to collect dust efficiently with natural centrifugal force;

2. It can be attached with a high-pressure gas storage tank to automatically clean the filter;

3. The dust collector is equipped with a cut-off valve, which can effectively move the dust of the dust collector without stopping the machine.

Features of fast feeding station (dividing station):
The branching station is composed of several branches, and the raw material of the same branching tube can be used by the injection molding machine, and each branch has a quick press head to ensure airtightness; it can improve the system efficiency and facilitate the replacement of materials.