AMSON AEPSF0210 Machine consists of a stainless steel panel structure over which is mounted the entire filling unit so as to make the unit a compact one. Inside the panel box is mounted all the electrical fittings and pneumatic control valves. At the door side of panel box is the fill timer, batch counter, Power ON OFF switches and indicators etc are fitted. Over the top of panel box, mountings like stainless steel 316 fill barrels of maximum 10gms capacity- 2 nos, pneumatic cylinder assembly for piston actuation/ valve rotation, product holding SS316 hopper of 3 kg capacity( 4 liters in volume) with a top lid and stainless steel 316 direction control valve, small manual stirrer etc..
Since this machine is designed to fill 2 syringes at a time, the barrel-piston-valve unit is attached to a pneumatic cylinder linearly. This model machine consists a mono-block design for barrel and valve to get high accuracy in filling. The volume of filling can be accurately adjusted from 0.5gm to maximum 10 gm. Paste can be feed into the hopper from top side. Bottom side of hopper is having an outlet fitted with valve side with 2 dividing outlets perfectly matching over the valve assembly. This product hopper section is easily removable and attachable with the help of sanitary fittings (tri clamp). The stainless steel product bulk hopper can hold 3 kgs of material (paste) at a time. There is a manual hand operated stirrer provided on the lid of hopper to stir and push the product down when it is needed. Product can be paste or gel as per required. The product measure barrel is made in the mono-block valve block at 90 degrees to the hopper, and the fill nozzles at the opposite side of valve block inline with the barrel, and facing out to the front side of the machine. This direct fitting of nozzles to the direction control valve helps to avoid any dripping during filling.
The filling barrel is having a diameter of 12mm and a maximum stroke length of 80mm. The piston rod from the filling barrel is directly attached to a pneumatic cylinder, linearly and a fill volume adjustable screw above the pneumatic cylinder. The volume adjustment screw is with a white delrin part which is adjusted only after turning off and draining the air supply to ease the operation. There is a lock nut also provided on the volume adjustment screw to lock the stroke length once set at desired volume.
Valve unit is having a smooth rotating pin inside with holes at 90 degrees to each other. The direction of holes decides the suction and discharge of product to and from the fill barrel. This is made possible by a pneumatic semi rotary actuator assembled from the side on a flange. The semi rotary mechanism rotates the valve pin.
FILLING PROCESS:
Filling is done when the operator presses and releases the pedal operated foot switch once. The barrels already sucked product and measured it before each fill. When the foot pedal electrically operated switch is activated, the rotary valve opens towards the nozzle to barrel and the pneumatic cylinder moves forward to push the product to through the nozzle. The syringe attached to the nozzle is filled by pushing the plunger backwards automatically with the pressure of product. Each filling is done with high accuracy. The filling action is controlled by a digital timer. This timer can be set as per the fill speed requirement related with the flow of air to the pneumatic cylinder. The speed of filling is adjusted with the flow control valves attached over the pneumatic cylinder. Electrically actuated solenoid valve controls the direction of cylinder forward or reverse. Accuracy of filling is very much high in this machine since high quality materials are used in this. Minimum filling in this machine is 0.5gm and maximum achievable fill quantity is 10gms from each nozzle. A maximum output of 15 fills per nozzle can be done by adjusting the air supply to pneumatic cylinder and setting the timer both at a time. Total output combined from 2 nozzles from this machine per minute is 16 syringes @5 grams/ml.