Case Sharing of Central Conveying System

An Automotive Interior System Co., Ltd. in Chongqing is the world’s leading auto parts manufacturer, and World’s Top 500 Foreign-funded Enterprise, which mainly produces car seats, emissions control system and auto interior and exterior decoration. This plan requires 25-station conveying system, including 22 sets of injection molding machines, 22 sets of granulators and 2 sets of gravimetric blenders.

Shini fully considered the simultaneous pumping and switching of materials in the IMMs in strict accordance with the customer’s demands that reasonably designed 18 groups of 1-to-3 and 13 groups of 1-to-4 material distribution stations to satisfy quick material shift of the IMM. The dryer equips with the shut-off valve—— perform once pipe shut-off cleaning after each material loading, which effectively ensures no materials left in the pipe to prepare different materials for the IMM so the materials are in pure colors after switching, reaching the demands of production process.

As varieties of customer's materials and huge production, this plan especially designed three large silos according to his demands, including: one 4-ingredient silo (a silo is divided into 4 sections); two are used to store the virgin material; The one ingredient silo is used for keeping the materials for central granulating, which is fed by positive pressure in process design: mount the quick connector on each silo with a movable rotary valve that can blow different varieties of materials into corresponding silos for storage very conveniently as to satisfy the need of one month purchase cycle  of material for the customer.

The negative pressure feeding system has been adopted by the conveying process from the large silo to the dryer. So, according to the requirements, 22 sets of 1-to-4dryers are equipped, and four dryers share the integral-type floor stand together, which are neat, organized and save the space. The height of floor stand is enough to contain 100kg storage hopper that is convenient for the customer to push the storage hopper under the floor stand after loading, reducing the equipment’s occupation to the minimum in reasonable layout with space utilization increase. Even it is seen from overall view, this dynamic combination of seven blowers with one for pack up, filters and dust separator are also organized, simple and attractive. In the system, the main materials of the nine dryers are supplied by the large silo through three proportional valves and six quick connectors that are used for granules in one ingredient large silo loaded by proportion and additives in the storage hopper, which are switched by the manual.

The plan for whole conveying system includes: dryer conveying, IMM conveying and large silo conveying that are all marked with electrical advertising signs. The advertising signs are controlled by the central control station with real-time display of the equipment’s operational status to achieve digital, transparent and visualized management in the workshop; The hopper’s shift calling function ——advertising sign system is combined with the calling switch box beside each IMM based on working conditions of the position button, reset button and buzzer, making closer connection between the operators in workshop and the material room. It effectively improves the communication of the operators on material switching, properly simplifies the operation process and improves the production efficiency.