MDO Stretching Group Machine is a high-performance film processing equipment, which is mainly used to heat the film to the elastic critical point and then stretch it in one direction. The external structure includes a preheating roller group, a stretching roller group, a shaping annealing roller group, a cooling roller group and a feeding chain mechanism, and is equipped with an independent temperature control system and a multi-axis drive system.

1. Precise temperature control to improve molecular orientation efficiency

MDO Stretching Group Machine is equipped with 6 sets of preheating rollers, 6 sets of annealing rollers and 2 sets of cooling rollers. Each roller is equipped with an independent temperature control system with a temperature control accuracy of up to ±0.5°C. Ensure that the film is heated evenly at each stage, maximize the activation of molecular chain activity, and provide a stable foundation for subsequent stretching.

2. High-multiple stretching to improve the physical properties of the film

MDO Stretching Group Machine can achieve a maximum longitudinal stretching ratio of 10 times, effectively improving the mechanical strength, stiffness and air permeability of the film. High-multiple orientation improves the molecular arrangement direction of the film, making the finished product significantly better than the unstretched film in terms of tear resistance and stretch resistance.

3. Adjustable stretching gap to adapt to various original film thicknesses

The gap between the stretching rollers adopts a modular adjustable design, which supports fast switching of film thicknesses ranging from 10μm to 60μm. It can adapt to different substrates and processes without changing rollers, greatly improving the compatibility of equipment and production line switching efficiency.

4. Independent drive control, smoother operation

Each roller is driven by an independent servo motor and coordinated with the main control PLC to ensure accurate matching of stretching speed and tension. This design can reduce the failure rate of film slipping and film breakage during high-speed operation, and is suitable for demanding high-precision production lines.

5. Film feeding chain structure to ensure centering and film guiding stability

MDO Stretching Group Machine is equipped with a high-strength film feeding chain system to keep the film material on a stable track before entering the stretching roller, reduce film edge deviation and film guiding misalignment, and is particularly suitable for wide-width film stretching.

6. Independent PLC module, supporting customized logic control

The MDO device adopts a discrete PLC control system, which can customize the control logic according to the user's actual stretching process, support multiple tension mode switching, and record stretching data online, which is conducive to process tracking and quality analysis.

1. Medical film production plant in Frankfurt, Germany

The plant mainly produces microporous breathable films for protective clothing. By installing the MDO device on the main line of cast film, 8 times stretching is achieved, so that the film material has both high stiffness and high breathability. The MDO Stretching Group Machine is eventually supplied to the Hartmann Group for medical isolation clothing materials.

2. Food packaging material factory in Pune, India

The customer is a large local food packaging film manufacturer. The introduction of the MDO Stretching Group Machine has increased the transparency of the film by 30% and the oxygen barrier performance by 45%. The cooperative brands include Amcor India, a global food packaging giant, whose core component of the multi-layer barrier film product line is MDO stretch film.

3. Disposable Diaper Production Base in Ho Chi Minh, Vietnam

The customer uses this device to stretch the PE bottom film 5 times to enhance the tear resistance of the film material, maintain an extremely low weight and improve wearing comfort. MDO Stretching Group Machine serves the Vietnam factory of the international maternal and child brand Unicharm, with an annual output of more than 3,000 tons of stretched bottom film.

4. Roof Waterproofing Material Factory in Sao Paulo, Brazil

MDO Stretching Group Machine is integrated into the waterproof film blowing production line, using high-multiple stretching to improve the puncture resistance and dimensional stability of the film material. The film material is used for building roof anti-seepage projects. The cooperative brand is Vedacit Building Materials Group, which is a mainstream waterproofing membrane supplier in South America.

1. Periodic inspection of each section temperature control system

It is recommended to check the heating unit of each roller every two weeks to ensure that the accuracy of the temperature control module sensor remains within ±1°C. Regularly check whether the heating element has carbonized scale to prevent local overheating from affecting the performance of the film.

2. Servo drive mechanism lubrication and calibration

Every 1000 hours of operation, all servo motors should be lubricated and refilled, and the synchronization accuracy of each motor should be calibrated through the main control system to ensure the consistency of roller speed and reduce the tension fluctuation caused by the speed difference during the film stretching process.

3. Cleaning and coating maintenance of stretching rollers

High-temperature stretching rollers are prone to adhere to film residues. The surface should be cleaned with a soft solvent after daily shutdown to avoid hard scrapers scratching the fluorine coating. The surface flatness and coating integrity should be rechecked every year to ensure the stability of the stretching friction coefficient.

4. Film feed chain tension adjustment

The feed chain system will be slightly relaxed after continuous operation. The tension of the tension wheel should be checked monthly to prevent the film from shifting during transportation and affecting the subsequent stretching trajectory. Adjust the chain or replace the worn chain link if necessary.

5. Electrical stability inspection of the control system

Regularly check the PLC module and the electric control cabinet for dust removal and loose wiring. Especially in high humidity environments, it is recommended to install a dehumidifying MDO Stretching Group Machine to avoid electrical system short circuits or program execution delays that affect the full process of automated stretching.