7/31/2020

Delta's Highly Efficient Extrusion Blow Molding Machine Solutions Optimize the Forming Process and Wall Thickness Control

Blow molding machines are common in plastic container production, such as PET bottles, cosmetics containers, medicine bottles and more. There are diverse blow molding machines for manufacturing regular or irregular container shapers. A blow molding machine melts plastic particles into parisons, clamps the parisons into molds, and blows compressed air into them, which is also known as blow molding. The parisons gradually take the shape of the molds through applied air pressure.

A conventional blow molding machine usually operates with hydraulic pressure. It cannot produce precise wall thickness, consumes much energy, makes noise, and requires frequent maintenance. In addition, it fails to inject plastic consistently into clamp molds with a stable force, which results in an uneven wall thickness of a container.

To improve blow molding efficiency and the precision of wall thickness, Delta provides highly efficient extrusion blow molding machine solutions. The extrusion blow molding machine performs the following process: extrudes the melted plastic into a mold to form a parison, forms a screw thread-like mouth, and cuts the excess plastic from the mouth. It then enters a pre-blow phase to prevent the parison mouths from adhering to each other, inserts a core pin into the parison, clamps the parison into a mold, and starts blowing and shaping. Later, the machine cuts the excess plastic from the bottom of the parison, cools it down, expels the air, opens up the mold and ejects the molded container.

Delta controls the extrusion pipe diameter with its Hybrid Energy Saving System (HES) and servo systems, which also enables the machine to cut excess plastic accurately. With the integration of the All-electric Injection Molding Machine AOP Series which provides a control interface for parameter setting and the PC-based Host Motion Controller MH2 Series which has a built-in EtherCAT, users can easily perform synchronous multi-axis motion control including the core pin axis, wall thickness control axis, and mold clamping axis. The MH2 Series connects to a temperature controller to control the plastic melting temperature.

Delta's highly efficient extrusion blow molding machine solutions provide the following benefits:

• Flexible programming
The AOP Series has various industry-specific function modules built-in for SoftPLC and SoftHMI programming, secondary development, and customized operation interface and motion control.

• A PAC platform for quick response
The PC-based MH2 Series integrates all the motion commands and curves to accurately control the axis motion and plastic temperature. The servo systems operation is not affected by the firmware version and this reduces maintenance requirements.

• Integrated wall thickness control
Users only need to set parameters on the MH2 Series to perform all-electric wall thickness control with high efficiency, saving on cost for any additional wall thickness controller.

• All electric and hybrid operation
The extrusion blow molding machine solutions integrates the all-electric controller, servo systems, and the HES system for high accuracy and stability, and powerful hybrid mold clamping. The production process is flexible, efficient, energy saving, and noise reducing.

Delta designs and manufactures all the systems adopted in the extrusion blow molding machine solutions for stable operation and easy maintenance. The solutions fulfill all-electric synchronous motion control for wall thickness, blowing, mold moving, and core pin insertion, and enhance the clamping force. The solutions are applicable to industries such as food, beverages, pharmaceuticals, cosmetics, and chemicals.

News Source:IABG MKT Dept.