30L - 220L Container

Double layer 220L double-ring chemical barrel blow molding machine application

200L barrel weight: 12-15 kg

Material: HMWHDPE

Thickness: 3.5-4 mm

This specialized chemical barrel blow molding machine is designed for efficient production of high-quality 220L double-ring blue chemical barrels. Utilizing a fixed open-closing mechanism, an oblique arm double drawbar synchronous clamping system, and a patented double-layer, double-bestrow accumulator die head, it delivers exceptional performance.

The chemical barrel blow molding machine incorporates a MOOG 100 thickness controller, robot arm, and bottom blowing system for enhanced efficiency. The produced drums meet stringent quality standards, including passing the 3-meter drop test and obtaining UN certification. Experience increased productivity and reduced operating costs with this specialized blow molding solution.

Blow molding 200L double-ring chemical drums is more complex than producing standard single-layer drums. The process presents several technical challenges, which require advanced machinery and precision. Here are the main difficulties:

1. Complexity of the Double-Ring Design

The double-ring design, typically located at the drum’s neck, adds structural strength and enhances sealing performance. However, this design complicates the blow molding process. Key challenges include:

• Precise Mold Design and Alignment: The mold must be finely tuned to ensure the double-ring section has the correct thickness and shape.
• Dual-Layer Blow Molding Technology: The blow molding process needs to precisely control the inflation of the two layers to ensure the formation of the double-ring structure without defects.

2. Uniform Wall Thickness

Maintaining consistent wall thickness throughout the drum, especially in the complex double-ring region, is critical. This requires careful control of temperature, pressure, and airflow during production. Challenges include:

• Temperature Control: Uniform wall thickness relies on maintaining consistent mold temperatures. Too high a temperature can lead to excessive material flow, resulting in thinner walls; too low a temperature may lead to incomplete molding.
• Pressure and Airflow Control: During the blow molding process, airflow and internal pressure must be finely adjusted to ensure uniform wall thickness, particularly in the double-ring areas.

3. Stability of the Dual-Layer Structure

The 200L double-ring drum uses a dual-layer design, where the outer layer offers impact resistance and the inner layer provides chemical resistance. The challenge here is ensuring that both layers are formed properly while maintaining their distinct properties. This requires:

• Separation and Bonding of Layers: The two layers must be separately inflated and then tightly bonded during molding. Any defects in the bonding process could lead to issues with the drum’s durability and chemical resistance.
• Precise Control Systems: Advanced PLC control systems are needed to manage the timing of the layer formation and ensure the correct thickness of both layers.

4. Pressure and Cooling in the Ring Area

The double-ring area, where the drum's sealing ring is located, requires precise pressure control and cooling. If not managed correctly, defects may occur in the ring, impacting the drum's sealing capacity. Key challenges include:

• Optimizing Cooling Speed: The cooling process in the ring section must be carefully controlled. Cooling too quickly could cause incomplete ring formation, while slow cooling could extend cycle times unnecessarily.
• Pressure Distribution: Proper air pressure distribution is essential to form the double-ring structure accurately. Too much or too little pressure can lead to ring deformation or weak spots.

5. Balancing High Production Efficiency with Quality Control

Since 200L double-ring drums are often produced in large quantities, balancing high production efficiency with stringent quality control is critical. Challenges include:

• Quick Mold Change and Cycle Time: The blow molding process needs to minimize cycle time while maintaining high-quality output. Fast mold changes and optimized cycles are essential for high-volume production.
• Automation and Monitoring: Automated systems and real-time monitoring are necessary to reduce human error and ensure that each production cycle meets quality standards.

6. Precision in Molding and Sealing Performance

The sealing ability of double-ring drums is vital for storing chemicals safely. Any small molding discrepancies can lead to sealing failures or weakened drum strength. Challenges include:

• Molding Precision at the Neck Area: The neck area, where the double-ring is located, requires extremely precise molding to ensure a perfect fit for the sealing cap.
• Air Pressure Control: Correct air pressure is essential in ensuring both the formation of the double-ring and maintaining the structural integrity and sealing performance of the drum.

7. Material Selection and Performance

The material used for 200L double-ring chemical drums (usually HDPE or PP) must meet chemical resistance, impact resistance, and molding requirements. Different materials have varying flow properties and melting points, affecting the blow molding process. Challenges include:

• Material Compatibility: The selected material must be compatible with the dual-layer blow molding process and able to meet both chemical resistance and durability requirements.
• Flowability and Formability: Different materials have different flow characteristics. The molding process needs to adjust for these characteristics to ensure consistent quality and efficiency.