Liquid Gel Capsule Filling Machine

Liquid gel capsule filling machine, also called gelatin capsule making machine, gelatin capsule filler, or gel filling machine, is the core device in soft capsule production.

I. Structure and Composition

It mainly consists of a frame, transmission system, rubber wheels, oil rolling system, pill - making device, spreading box, feeding system, and lubrication system. The main unit of the soft capsule machine has a mold size of ∮250X170mm. The left and right spindles for installing the mold are bored by a Swiss CNC boring machine, using Japanese "SKF" C - level high - precision bearings, with a spindle accuracy of ≤0.02mm. The transmission structure is designed to eliminate gaps in gear transmission and indexing, enhancing the capsule joint rate. It comes with a set of size 8 olive - shaped molds, and the individual differences in cavity size are ≤2μm.

II. Operating Principle and Control

1. Intelligent Control

This machine is intelligently controlled by a PLC program. The spindle and feeding are driven by a servo mechanism. Each component can be independently controlled, and the overall speed can also be adjusted. It features automatic mold alignment, automatic loading adjustment, and has a fault self - diagnosis function.

2. Temperature - related Control

The temperature of the large wheel can be automatically adjusted via the touch screen within the range of 6°C to 20°C to meet the production demands of different rubber materials and soft capsule products. The soft capsule refrigeration system includes an outdoor refrigeration unit and an internal condenser in the soft capsule machine. The cooling capacity in the condenser is transferred to the liquid refrigerant, which then, through a pump, transfers the cooling capacity to the left and right rubber rollers. Sensors in the system automatically control the refrigerant temperature to regulate the temperature of the rubber rollers. - The temperature control system adopts an intelligent program design. It has functions like temperature self - tuning, temperature deviation correction, and over - temperature alarm. The syringe is water - heated, and the temperature can be controlled within ±0.1 degrees.

III.Filling and Injection System

1.Injection Body and Pressurization

The injection body is made of copper. The injection holes can be either circular with a diameter of 1.6mm or rectangular with dimensions of 1.6×2.4mm. The mold pressurization can be adjusted pneumatically or manually, and the pressurized pressure value can be displayed.

2.Feeding Pump

The feeding pump has a ceramic pump rod design without timing, avoiding manual adjustment errors and making the filling volume more accurate. The main unit and the pump body are driven by servo motors. The injection time can be adjusted online, and the pump rod seal uses polytetrafluoroethylene gaskets, which can fine - tune the difference in the loading volume online by ±2%. The reversing pumping plate of the feeding pump undergoes nitriding treatment, reaching a hardness of 60 - 65 degrees. The pump body reversing plate lubrication uses a hidden oil groove, supplied by a self - priming pump and not in contact with the material liquid.

IV.Gelatin - related Adjustment and Supply

During the soft capsule pressing process, the gelatin box of the soft capsule machine can adjust the thickness of the left and right gelatin tapes through the front and rear handwheels of the left and right gelatin boxes. When the thickness of the left and right gelatin tapes is inconsistent, these handwheels can be adjusted to equalize the thickness. When the thickness of the gelatin tape on the same side is inconsistent, the handwheels on that side can be adjusted to make it uniform. The gelatin liquid in the gelatin box can automatically supply glue through the sleeve valve and the glue liquid level sensor. When the glue liquid level drops, the sensor signals the glue filling valve to open for glue supply. When the required level is reached, the sensor signals the covering valve to close and stop the glue supply, avoiding the unstable control and overflow issues caused by the original floating - ball - device - based gelatin box.

V.Lubrication and Hygiene

1. Lubrication

The rubber rollers are lubricated with medicinal paraffin oil. The lubrication adopts micro - controllable oil supply technology. The oil amount can be set on the touch screen operation interface, and a micro - adjusting valve at the oil outlet makes the oil amount control more precise. This method is free of alcohol and petroleum ether, reducing the risk of pill washing and costs.

2. Hygiene

During the capsule pressing process, a pressure fan blows air towards the set rotor cage, reducing the secondary pollution caused by the contact between the medicine and hands. The machine has a low noise level, with 60 decibels during no - load operation (at a distance of one meter) and ≤70 decibels during full - load operation.

Different model for different capacity

In summary, this liquid gel capsule filling machine combines advanced control technology, precise mechanical structures, and efficient material - handling systems to ensure high - quality and stable soft capsule production.

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