What parameters should be noted when purchasing an ABA blown film machine

ABA blown film machine, as an important equipment for plastic film production, is widely used in various fields such as packaging, agriculture, and medical care. Choosing the appropriate ABA blown film machine has a decisive impact on product quality, production efficiency, and economic benefits.

2、 Basic performance parameters

1. Extruder parameters

The extruder is the core component of ABA blown film machine, and its performance directly affects production efficiency and product quality:

Screw diameter: usually 45-150mm, the larger the diameter, the higher the output, but the energy consumption also increases accordingly. The appropriate size should be selected based on the expected output.

Length to diameter ratio (L/D): generally between 25:1 and 32:1. A larger aspect ratio can provide better plasticizing effect and more uniform melt.

Screw speed: affects production and plasticization quality, with high-speed screws reaching over 200rpm.

Drive power: ranging from 15-200kW, to match the screw diameter and output.

2. Mold head system

The mold head determines the forming quality of the film:

The diameter of the mold head ranges from 150-2000mm, which determines the maximum width of the film.

Mold head types: spiral, heart-shaped, etc. Spiral molds are more commonly used and can provide better melt distribution.

Mold gap adjustment: The precision adjustment ability directly affects the uniformity of film thickness.

3、 Product specifications and parameters

1. Film size range

Film width: ranging from 100-5000mm, to be selected according to product requirements.

Film thickness: 0.01-0.3mm, high-end equipment can achieve even thinner specifications.

Folding diameter: refers to the width of the film after folding, which affects subsequent processing.

2. Production parameters

Maximum output: kg/h means that small machines can produce about 10-50kg/h, while large machines can produce over 500kg/h.

Production speed: usually 10-100m/min, high-speed models can reach 150m/min.

4、 Material adaptability parameters

1. Applicable raw materials

A-layer material: usually PE, PP, etc., it needs to be confirmed whether the equipment supports the required grade.

B-layer material: adhesive layer material, such as EVA, special adhesive resin, etc.

Raw material melt index range: The equipment should be able to adapt to raw materials with different melt index (MFI).

2. Material proportioning capability

Adjustment range of layer thickness ratio: such as A: B: A=20:60:20 or 10:80:10, etc.

Raw material drying system: It is particularly important for moisture absorbing materials such as PA, PET, etc.

5、 Control system parameters

1. Degree of automation

PLC control system: Modern equipment often uses touch screen+PLC control.

Thickness automatic control system: beta ray or infrared thickness measurement, closed-loop control.

Online detection system: defect detection, thickness monitoring, etc.

2. Key control functions

Temperature control accuracy: preferably within ± 1 ℃.

Pressure monitoring points: monitoring of die pressure, melt pressure, etc.

Variable frequency control: Extruders, traction, coiling, etc. should adopt variable frequency control.

6、 Energy consumption and efficiency parameters

1. Energy consumption indicators

Specific energy consumption: kW · h/kg, reflecting equipment energy efficiency, the lower the better.

Heating power: It should be matched with the output, and zone heating is more energy-efficient.

Cooling system efficiency: affects production speed and product performance.

2. Production efficiency

Mold changing time: The rapid mold changing system can significantly reduce downtime.

Startup waste rate: Advanced equipment can be controlled within 5%.

Automation level: affects labor costs and operational difficulty.

7、 Structural design and manufacturing parameters

1. Mechanical structure

Rack stiffness: affects operational stability and film uniformity.

Guidance system: The design of herringbone board, stable bubble holder, etc. affects the quality of the film.

Roll up system: central roll up or surface roll up, affecting film tension control.

2. Manufacturing quality

Key component materials: Wear resistant alloys should be selected for screws and barrels.

Processing accuracy: affects equipment lifespan and operational stability.

Surface treatment: Key components should have appropriate surface hardening treatment.

8、 Auxiliary system parameters

1. Cooling system

Wind ring types: single-layer, double lip, rotating wind ring, etc., which affect cooling efficiency.

Wind volume adjustment range: affects the crystallinity and transparency of the film.

Cooling water system: It is important for screw cooling and hydraulic system cooling.

2. Other auxiliary devices

Static elimination system: Improve the surface performance of thin films.

Online printing system: Some equipment integrates printing functions.

Edge material recycling system: affects the utilization rate of raw materials and production costs.

9、 After sales service and technical support

1. Supplier qualifications

Manufacturer experience: Experienced manufacturers in the industry are more reliable.

After sales service network: response speed and technical support capability.

Spare parts supply: availability and pricing of key components.

2. Technical support

Process formula support: New material development and application support.

Operational training: A comprehensive training system can reduce operational errors.

Equipment upgrade capability: potential upgrade and expansion space in the future.

Choosing an ABA blown film machine is a systematic project that requires comprehensive consideration of various factors such as equipment performance, product requirements, investment budget, and long-term operating costs. It is recommended that users:

Clarify one's own product positioning and future development plan

On site inspection of equipment operation and manufacturer's strength

Compare the technical solutions and quotations of multiple suppliers

Value after-sales service and technical support capabilities

Consider the scalability and upgrade space of the device

By comprehensively evaluating the above parameters, users can choose the ABA blown film machine that is more suitable for their production needs, achieving high-quality, high-efficiency, and low-cost film production.