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Glue Melting Tank

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Overview

The gelatin melting tank is generally a bidirectional stirring tank. Due to the vacuum pumping inside the tank, it is also called a vacuum stirring tank. In addition to gelatin melting, the gelatin melting tank can also be used for batching, so it can also be referred to as a stainless steel batching tank.

 

The gelatin melting tank adopts a closed three-layer structure, with electric heating tubes inserted into the jacket for heating or water bath circulation heating. The stirring is composed of two sets of coaxial reducers. The stirring assembly uses multi-layer shunt type blades, which are driven by double-axis bidirectional positive and negative stirring shafts. This design has the following advantages: accelerating the melting time of gelatin solution, stably melting gelatin particles, overcoming the scorching phenomenon of gelatin solution, improving the gelatin liquid medium, enhancing the liquid homogeneity, ensuring the high-quality pill pressing performance of the pill press, increasing the yield of capsule pills, and improving the economic benefits of enterprises. It fully complies with GMP hygiene standards and is a new-type equipment for gelatin melting, batching, and vacuum stirring homogenization in the capsule pharmaceutical industry.

 

As a multifunctional vacuum stirring tank, the gelatin melting tank can also be called a multifunctional batching tank or used as an injection liquid preparation tank.
The gelatin melting tank is equipment used for preparing gelatin solution required for capsule shells in the production of soft gelatin capsules. When using it as a batching tank, the following procedures are performed:

 

  1. Add the formula-required amount of purified water and glycerin into the gelatin melting tank, mix them evenly, and heat the mixture to between 70°C and 80°C.
  2. Add the formula-required amount of gelatin particles, stir while pumping vacuum, and close the vacuum until no more foam is drawn up.
  3. Dissolve the gelatin under negative pressure for 30 to 70 minutes, pump vacuum again, and then release the gelatin solution into the heat-preservation tank.

Operational Precautions

The gelatin melting tank is highly intelligent, capable of automatic temperature control and automatic stirring after activating the stirring button, making it very simple to operate. However, the following key points should be noted during the gelatin melting process:

Operational Precautions for Gelatin Melting

  1. Pre-Operation Inspections for Efficiency
    • Check if the hot water circulation system and vacuum pumping system are functioning normally, and whether the hot water temperature meets process requirements before gelatin melting. For electric heating models, preheat the system by turning on the electric heater in advance.
    • Before use, inspect the amount of heating medium in the jacket to prevent dry heating.
  2. Vacuum Pumping Monitoring
    • When starting vacuum pumping, carefully observe the liquid level rise in the tank to prevent material overflow and blockage of vacuum pipes by vacuum entrainment.
  3. Vacuum Timekeeping and Sealing
    • Start timing the vacuum duration when the liquid level stabilizes (i.e., when the sponge layer forms and the liquid level stops rising). Ensure the gelatin melting tank is sealed properly, as damaged gaskets in the gelatin discharge pipe valve may allow air ingress during vacuuming, causing bubbles.
  4. Time and Temperature Control
    • Control the entire process from gelatin input to discharge within 2 hours, with the temperature not exceeding 72°C.
  5. Recycled Gelatin Addition
    • If using recycled gelatin (mesh gelatin), add it only after the gelatin has fully dissolved to avoid undissolved gelatin particles in the solution.

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