/ep_edm/en/contect_625.html SHINI PLASTICS TECHNOLOGIES, INC.

Experience Sharing

2012 Quarter 2 Issue 11

Successful Application of System Solution

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At the end of 2011 Shini China, one branch locating in Zhejiang received an order from a customer in Wuhu, Anhui province. The customer has 66 injection molding machines and requires that one unit for four varieties of materials feeding. Material shape is granule and all need to be dehumidified, and maximum throughput of each dehumidifier is 30kg/hr, conveying horizontal distance is 140 meters, vertical height is 4 meters. Units layout: totally there are 4 rows (first row with 17, second with 16, third with 16 and fourth with 17). Based on parameters, we work out one exclusive system solution as below:


• Considering just one kind of material is applied, we decided to lay four-way pipes in each unit row and every machine corresponds with 4 feed inlets. Manually switching stainless steel quick coupling is adopted to feed materials so that any kinds of material can be selected.


• Adopting feeding combining Y-type valve with return valve, dryers are equipped with tailored pneumatic shut-off suction box and each dryer serving 4 rows machine.


• Vacuum motor is driven by 11kW Roots blower, equipping with cyclone dust recycler and pulsed dust collector.


• Machine is equipped with storage hopper SCH-12U to work with SHR-12U-S.


• Feed port of vacuum hopper is equipped with pneumatic level valve to ensure leakproofness inside pipelines.


• Air suction pipe diameter is 2.5 inch and material suction pipe diameter is 2 inch.


• Each row is equipped with one suction motor and one floor-mounted cyclone separator.

 

System analysis: after evaluating the operation performance and costs of system, we reach a conclusion that if system were to supply 510kg/hr material volume within 140 meters without any material blocked and stuck, it is imperative to use Roots blower with enough pressure and air quantity as well as high efficient program controlling. PLC central control station adopts two SCCS-300-G, each of them will be controlling 36 locations. Pneumatic level valve in feed port of vacuum hopper greatly reduces friction with material to extend lifespan. Storage hoppers in unit platform has a capacity of 6~8kg, which is convenient for daily maintenance and debugging.

 

With the tailor-made system plan and competitive quotation, Shini system solution outplayed other solutions from opponents and Shini successfully got the order. The next two months has seen system installation and debugging before customers put it into productions. To date, no faults report has been submitted.


After optimization, the performance of central conveying system meets the requirement of the customers with simple operation, high reliability and capability of saving manpower, resources and energies. This is undoubtedly an outstanding application of Shini system solution in auxiliary plastic industry.

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