Description: Actuation unit for modified starch quantitative packaging equipment. Driven by compressed air, it executes bag clamping, fast /slow feed gate opening closing, material discharging and pneumatic cutter actions for sewing machine heads. Cooperates with weighing control systems to realise fully automatic packaging workflows. Suited for fine dusty, slightly moisture absorbent modified starch production environment. Typical working air supply pressure: 0.5 0.7 MPa.
Consists of air filter, pressure reducing valve and oil mist lubricator. Oil free variants are available for food grade starch applications. Filter: Removes moisture, oil and solid contaminants from compressed air; protects downstream valves and cylinders and prevents spool jamming. Pressure reducing valve: Stabilizes output working pressure to ensure consistent output force across all cylinders. Oil mist lubricator: Supplies lubrication for pneumatic parts. For food grade duties, remove oil mist unit and adopt oil free cylinders to avoid grease contamination of modified starch product.
1. Solenoid Valves: Mostly two position five way type, mainly DC 24 V. Receives PLC commands to switch air circuit direction and control cylinder extend retract movements. Multi cylinder setups use integrated solenoid valve manifolds. Dust proof measures required for dusty workshops; select explosion proof solenoid valves for hazardous area installations.
2. Flow control throttle valves: Fitted on both ports of cylinder air circuits. Adjust exhaust flow to limit cylinder actuation speed, reducing heavy impact from gates and bag clamping mechanisms to preserve weighing accuracy.
3. Magnetic proximity switches: Mounted on cylinder outer walls to detect piston end of stroke position. Feedback status signals to control system to confirm bag clamp / gate open closed status for program interlock protection.
Pneumatic cylinders convert compressed air energy into linear mechanical motion, performing bag clamping, gate actuation and discharging actions. Matched with magnetic switches for position feedback; oil free cylinder variants for food grade starch processing conditions.
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