High Speed Bi-Layer Tablet Press Machine | Tablet Press + Uphill Tablet De-Duster + Metal Detector | Shanghai Tabletpress

1. What is a Bi-Layer Tablet Press Machine Used For?

A bi-layer tablet press machine is used to produce tablets that contain two different layers of powder or granules which are compressed into a single tablet. These two layers can contain different active ingredients, different colors, or different release profiles.

Bi-layer tablets are commonly used in industries such as:

*Pharmaceutical industry – combination drugs

*Nutraceutical industry – vitamins and supplements

*Chemical industry

*Food supplements

*Advantages of Bi-Layer Tablets

*Combine two ingredients in one tablet

*Separate incompatible materials

*Create immediate release + sustained release in one tablet

*Improve product appearance and branding

2. How Does a Bi-Layer Tablet Press Machine Produce Bi-Layer Tablets?

A bi-layer tablet press works by compressing two layers sequentially inside the same die.

Step-by-Step Processes as below:

1- First Layer Feeding

The first powder/granule material is fed into the die cavity by the first force feeder.

2-First Layer Pre-compression

The lower punch rises smoothly along the lower pressing roller and forms the first layer with the upper punch.

3-Second Layer Feeding

The second material is fed into the same die on top of the first layer by the 2nd force feeder.

4-Main Compression

Both layers are compressed together by the upper and lower punches which are compacted by upper and lower compression rollers.

5-Tablet Ejection

The finished bi-layer tablet is pushed out of the die by the lower punch and then dischaged through the output chute.

In high-speed automatic tablet presses, sensors and control systems ensure:

Accurate weight

Layer separation

High production speed

Consistent tablet hardness

Protect the machine when pressure overloaded by stopping the machine automatically.

Force feeder: 

There are impellers inside the force feeder that can rotate at certain speed so as to push the material into the die matrix effectively.

Can this bi-layer tablet press machine press single layer tablets?

Yes, this bi-layer tablet press machine can also be used to making single layer tablets by change the corresponding tracks.

3. What Is an Uphill Tablet De-Duster Used For?

An uphill tablet de-duster is used to remove excess powder (dust) from tablets after compression.

After tablets leave the tablet press, they usually have fine powder attached to their surface, and the fine powder will possibly cause trouble to the following packing work when it becomes more and more on the packing equipment. It will also cause bubbles on the tablet surface if the tablets need to be coated.

The uphill de-duster function:

Lifts tablets upward in a spiral vibrating path

Removes powder and loose particles

Polishes the tablet surface

Transfers tablets to the next process

It also helps transport tablets to a higher level so they can enter downstream equipment.

4. Why Do Tablets Need to Be De-Dusted?

Tablet de-dusting is very important for product quality and safety.

Reasons for De-Dusting

✔ Improve tablet appearance

✔ Remove loose powder

✔ Prevent cross-contamination

✔ Reduce dust in the production environment

✔ Protect packaging equipment

✔ Meet GMP pharmaceutical standards

Without de-dusting, powder can accumulate in:

Bottling machines

Blister packing machines

Counting machines

Cause bubbles on the coating surface of the coated tablets

5. Why Should Metal Detectors Be Used?

A metal detector is used to detect and remove metal contamination in tablets.

Metal particles may come from:

Machine wear

Raw materials

Tools or screws

Maintenance operations

Benefits of Metal Detection

✔ Protect consumer safety

✔ Meet pharmaceutical and food safety regulations

✔ Prevent product recalls

✔ Protect brand reputation 

If metal contamination is detected, the system can automatically reject the affected tablets, give warning and record the rejection at the same time.

High Speed Bi-Layer Tablet Press Machine | Tablet Press + Uphill Tablet De-Duster + Metal Detector | Shanghai Tabletpress

Above video is for a newly finished high speed automatic tablet press which is pressing bi-layer tablets, and the bottom layer can be discharged separately for sampling checking from one of the two outputs, and bi-layer tablets can be discharged from the other output.Defective tablets can be rejected automatically through the Defective channel. An uphill tablet de-duster is connected to the output of the tablet press machine and a metal detector is connected to the output of the uphill tablet de-duster . If you want to get the price for this bi-layer tablet press machine manufactured by Shanghai Tablet Press Mechanical Components Co., Ltd., you can contact by whatsapp +8618001921232 or michael@stctp.com 

  This high speed automatic bi-layer tablet press machine manufactured by Shanghai Tabletpress Mechanical Components Co., Ltd. 

The tablet press is designed for high-speed production of bi-layer tablets widely used in pharmaceutical, nutraceutical, food supplement, and chemical industries.

During this test, the machine is compressing two-layer tablets with stable pressure, accurate weight control, and excellent tablet quality.

One special feature of this machine is the dual tablet discharge system. The bottom layer tablets can be discharged separately from one output for sampling and quality inspection, while the finished bi-layer tablets are discharged from the second output.

The system also includes an automatic tablet weight adjustment, which can correct the tablet weight difference when the tablet weight deviation goes beyond the pre-set range, and if the tablet weight difference goes beyond the maximum tolerant limit, the automatic defective tablet rejection system will reject the defective tablets through the defective tablet channel automatically to ensure consistent product quality. 

After compression, tablets enter an uphill tablet de-duster, which removes excess powder from the tablet surface while lifting the tablets to a higher level for the next metal detector inlet.

At the outlet of the de-duster, a high-sensitivity metal detector is installed to detect any possible metal contamination and ensure product safety.

This integrated production line improves:

• Tablet cleanliness

• Product safety

• Production efficiency

• GMP compliance

Shanghai Tabletpress Mechanical Components Co., Ltd. is one of the professional and famous manufacturers of tablet press machines in China and have been specialized in manufacturing tablet machines as below:

• Tablet press machines 

• High speed rotary tablet presses

• Bi-layer tablet presses

• Tablet tooling and spare parts

• Tablet de-dusters and auxiliary equipment

Factory Show

Assembling line for high speed tablet press machines

Assemble line for rotary tablet press machines