In the production of pharmaceutical plastic bottles using injection stretch blow molding, various auxiliary machines are crucial to ensuring a smooth and efficient manufacturing process. These machines help maintain high-quality production standards and improve overall operational efficiency. Key auxiliary equipment in the production of pharmaceutical plastic bottles includes conveyor systems, air compression and purification units, raw material dryers, automatic feeders, and mold temperature controllers. Each of these plays a vital role in maintaining product quality and meeting industry standards.

1. Conveyor System

The conveyor system is a critical component of the production line, designed to streamline the movement of bottles throughout the manufacturing process. Typically, this system includes stainless steel flat chain drives, a flame treatment device, and a counting mechanism. Stainless steel flat chains are preferred because of their corrosion resistance and ease of cleaning, which helps prevent contamination—an essential factor in pharmaceutical packaging. These chains are also less likely to deform after undergoing flame treatment compared to plastic alternatives. The flame treatment device is used to remove any oil stains from the bottle surfaces, enhancing their readiness for label application. The intensity of the flame can be adjusted to suit the specific needs of different bottle types. Additionally, the counting mechanism uses a photoelectric switch sensor to track the number of bottles produced, triggering an alarm once the set quantity is reached. This system minimizes the risk of contamination compared to manual operations, ensuring that the bottles meet the high hygiene standards required for pharmaceutical packaging.

2. Air Compression and Purification System

A reliable air compression and purification system is essential for providing clean compressed air during the production process. This system typically includes an oil-free compressor, air storage tank, air dryer, and filters. The air supplied to the production line must be free from contaminants such as dust, water, and oil mist, with a dust and water content under 100mg/m3 and filter precision of 5 microns. The blowing pressure is usually maintained at 1.2 MPa, with an air supply rate of 0.5 m3/min. These parameters ensure the air quality aligns with the stringent requirements of pharmaceutical bottle manufacturing.

3. Raw Material Dryer

The moisture content in raw materials is a key factor influencing the production of plastic bottles. Excess moisture can lead to defects such as streaks or bubbles on the bottle surface. Therefore, when raw materials have high moisture content, using a dryer becomes necessary to reduce excess moisture. However, if proper handling and storage practices are followed, the use of a dryer can often be avoided, as maintaining a dry storage environment for the raw materials will prevent moisture buildup before the production process begins.

4. Automatic Feeder

To enhance automation and reduce manual labor, the use of an automatic feeder is highly recommended. This device streamlines the material supply process, improving overall production efficiency and minimizing the risk of errors that can occur with manual handling. By ensuring a steady and consistent supply of materials, the automatic feeder plays a vital role in large-scale manufacturing, ensuring both speed and accuracy in production.

5. Mold Temperature Controller

The mold temperature controller is crucial for regulating and stabilizing the temperature of the molten plastic within the injection mold. Different raw materials require specific processing temperatures, and the mold temperature controller allows precise temperature adjustments during the production process. By maintaining consistent preform temperatures and ensuring uniformity in bottle sizes, the controller helps to avoid issues such as preforms sticking to the core rod (caused by excessively high temperatures) or poor expansion and molding (caused by insufficiently low temperatures). Proper temperature control is essential to achieving high-quality and accurately molded bottles.

Together, these auxiliary machines form an integrated system that ensures the efficient and consistent production of pharmaceutical plastic bottles through injection stretch blow molding. Not only do they enhance production efficiency, but they also help maintain the hygiene and quality standards that are vital in the pharmaceutical industry. By using these advanced systems, manufacturers can produce high-quality bottles that meet the strict regulatory requirements of pharmaceutical packaging.