In terms of the degree of automation of production, it is mainly divided into semi-automatic filling machines and full-automatic filling production lines. From the perspective of material packaging, it can be divided into the liquid filling machine, paste filling machine, powder filling machine, particle filling machine, and sauce filling machine.

According to experts, there are three common filling methods when filling liquids.

Normal pressure method, which is also called the pure gravity method, that is, under normal pressure, the liquid material flows into the packaging container by its weight. Most free-flowing materials without gas and liquid can be filled by this method.

The isobaric method is also called the pressure gravity filling method, that is, under the condition of high air pressure, the packaging container is first inflated to form the same air pressure as the liquid storage box, and then flows into the packaging container by relying on the self-weight of the liquid material in the tank.

The vacuum method is filling under conditions lower than atmospheric pressure, mainly including differential pressure vacuum type and gravity vacuum type.

Of course, the filling machine is also like people. If you work for a long time without replenishing energy, or without proper rest, it will fail. When the filling machine is in daily use, the loading capacity of the ceramic pump filling system in the corking machine is unstable. Some filling machine manufacturers said that the mechanical structure and electrical control can be considered.

Mechanical structure

Generally speaking, the filling system includes a liquid distribution system and a liquid separator. The liquid distribution system is mainly used to transfer the configured liquid medicine to the liquid separator or liquid medicine bag. The liquid separator is a buffer liquid separation integrated tank and a closed liquid separator.

The filling part is mainly composed of a rotary valve motor and drive unit, multi-set motor and drive unit, transmission gear, roller screw, and ceramic pump. The needle frame structure is mainly used for tracking and positioning bottles for the corresponding filling.

Electrical control

The filling is carried out through the position control mode of the servo motor, which can realize positioning. The following three points belong to electrical control: when the servo motor does not reach the specified position, the servo motor alarms and stops filling and equipment; At the same time, the control of the rotary valve is the same as that of the filling pump; Control of reciprocating and lifting of needle frame.

Maintenance of filling machine

According to experts' analysis, the inaccurate filling volume is generally caused by drops or bubbles, so special sterilization equipment can be used as far as possible; Do not mix the pump body and pump rod; Try to reduce the height difference of the installation position of each component. If it cannot be reduced, add a buffer device between the buffer tank and the pump; Increase the number of tests after installing the pump every time. If the connection loose knot shakes too much, it is recommended to replace it.

In addition, fasten the needle frame. If it cannot be fastened, replace the fastener. The length of the silicone tube should be reduced as much as possible. If it still shakes, add a fastener in the middle. Of course, it is also necessary to add different formulas for the amount of reflux according to different pharmaceutical processes and call different formulas for the amount of reflux under different circumstances.

If you want the filling machine to work efficiently and have a long service life, you need to maintain the filling machine regularly. You can observe the water filter and oil mist of the pneumatic combination before going to work every day. If there is too much water, it should be removed in time, and if the oil level is not enough, it should be refueled in time. During production, we should often patrol and observe the mechanical parts to see whether the rotation and lifting are normal, whether there are abnormalities, and whether the screws are loose.

Check the ground wire of the filling machine frequently, and the contact shall be reliable; Frequently clean the weighing platform; Check whether there is air leakage in the pneumatic pipeline and whether the air pipe is broken. The user also needs to replace the lubricating oil (grease) of the reducer motor every year, check the tightness of the chain and adjust the tension in time. If you stop using it for a long time, empty the materials in the pipeline.

Users should do a good job in cleaning and hygiene, keep the surface of the machine clean, often remove the accumulated materials on the scale body, and pay attention to keeping the electric control cabinet clean. In addition, the sensor is a device with high precision, high tightness, and high sensitivity. It is strictly prohibited to impact and overload, and it is not allowed to contact during the working process. It is not allowed to disassemble unless it is required for maintenance.

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