CFK Series Automatic Capsule Filling Machine

What is the CFK 1500 Series Capsule Filling Machine?

The CFK-1500 series capsule filling machine is a fully automatic capsule filling machine newly developed by Canaan, incorporating advanced domestic and international technology. This equipment features an attractive design, smooth operation, low noise, and is easy to operate and clean.

The entire machine uses an intermittent rotary mechanism and a tamping method for quantitative filling. It is suitable for filling powder and granules into capsules ranging from size 00# to 5#. Optional auxiliary equipment, such as an automatic capsule feeder, vacuum feeder, metal detector, polisher, and elevator, can also be added.

Technical Parameters

Features

• Adopt single row 11 die holes, 10 workstations design
• Adopt original double RU110 dividing box combination
• Adopt the second generation fully enclosed turntable design
• Adopt three-dimensional regulating mechanism
• Manufacture of Inner Grooved Wheel Drive with High Quality Special Steel
• Internal cam for mechanical transmission
• Adopte capsule vacuum positioning sub-selection mechanism
• Automatic timing refueling system
• Multi-surface adjustable powder structure
• Blowing structure of mold
• Equipped with humidity secondary dehumidification device in filling room

How does the Capsule Filling Machine Work? – 7 Steps

1 Sorting of Empty Capsules

Principle

The capsule feeding tube is equipped with multiple circular channels inside, which are connected to the capsule hopper. Inside the channels, there are capsule clamping tabs.

As the capsule feeding tube moves up and down in a reciprocating motion, empty capsules fall into the channels. When the feeding tube moves upward, the clamping tabs hold the capsules in place. When the tube moves downward, the clamping tab assembly rotates, releasing the capsules, allowing them to drop out of the channels.

2 Orientation of Empty Capsules

Description

The capsule feeder head always acts on the middle of the capsule body. As the feeder head pushes the capsule, it causes the capsule to turn, ensuring that the capsule body is pushed to the edge of the capsule feeder comb. The capsule is then flipped over as the pressing head moves downward, pushing it vertically into the module hole.

Principle

• The point of force from the feeder head is applied to the capsule body.
• The width of the chute is smaller than the outer diameter of the capsule cap but larger than the outer diameter of the capsule body, so it only clamps the capsule cap without contacting the capsule body.

3 Separation of Empty Capsule Body and Cap

Principle

When the empty capsule enters the module hole, the vacuum suction seat rises and seals tightly with the lower module. The diameters of the small stepped holes in the upper and lower modules are smaller than the diameters of the capsule cap and body, respectively. Once the vacuum is activated, the capsule body is sucked into the hole of the lower module, while the step in the hole of the upper module prevents the capsule cap from descending. This results in the separation of the capsule body and cap.

4 Tamping Method for Quantitative Filling

Principle

Letters a-f represent different groups of tamping pins. During the intermittent period when the pins rise, the powder hopper rotates by a certain angle. As it completes a full rotation, the powder in the dosing disk holes is compressed once by each group of tamping pins. When the pins lift from the holes, the hopper rotates again, and the powder on the dosing disk automatically fills the remaining space in the holes. This process—filling and compressing—repeats until the sixth tamping, when the pin ejects the powder column from the dosing disk, dropping it into the empty capsule body below, completing one filling cycle.

The relative motion between the scraper and the dosing disk removes any excess powder on the surface of the dosing disk, ensuring that the powder column meets the measurement requirements.

Features of the Tamping Quantitative Method

• Accurate filling: For a fill weight greater than 0.3g, the variation is controlled within ±3%.
• The dose of the filled material can be fine-tuned by adjusting the height of the tamping pins.

5 Rejection Station

Purpose

Occasionally, some empty capsules may fail to separate the cap from the body for various reasons. These capsules, which are not filled with medication, remain in the upper module hole. To prevent these defective capsules from mixing with the finished products, they are removed before the capsule closure process.

Principle

A reciprocating pusher is located between the upper and lower modules. The pusher is equipped with a pin. As the upper and lower modules rotate, the pusher stays in the lower position, with the pin disengaged from the upper module. When the module stops at this station, the pusher moves upward, and the pin attached to the pusher is inserted into the hole in the upper module.

• If the hole in the upper module contains a properly separated capsule cap, the upward motion of the pin has no effect on the cap.
• If the hole contains an empty capsule where the cap has not been separated, the upward motion of the pin ejects the capsule from the upper module, and it is sucked into the air chamber for removal.

6 Capsule Closing Station

Purpose

The purpose of this station is to lock and seal the filled capsules by engaging the capsule cap with the body, ensuring the finished product meets the required standards.

Principle

The upper and lower modules rotate together to the capsule locking station, where their axes align. The upper stopper above the module and the pushing rod below begin to move toward each other. The upper stopper presses down on the capsule cap while the pushing rod ascends, causing the capsule cap and body to close and lock securely.

7 Capsule Ejection Station

Purpose

The purpose of this station is to eject the fully sealed and locked finished capsules, which are then collected.

Principle

The main component of this device is a reciprocating ejection rod. When the upper and lower modules carrying the closed capsules rotate to the ejection station and stop, the ejection rod pushes the capsules out of the module holes. The capsules are then blown into the discharge chute and slide into the collection container.

8 Cleaning Station

Purpose

The cleaning station is designed to clean the modules in preparation for the next cycle.

Principle

When the upper and lower modules are driven by the main working platform and stop at the cleaning station, they align with the opening of the cleaning device. At this point, compressed air is activated to blow out any powder, broken capsule fragments, and other contaminants from the module holes in the lower module. The vacuum system positioned above the module holes then sucks these contaminants into the vacuum cleaner, ensuring that the module holes remain clean for the next operational cycle.

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