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Compression Blow Forming Platform with CBF20 Machine
Time: 2017-04-19
Compression blow forming (CBF) platform with a new 20-cavity CBF machine for production of HDPE pharmaceutical bottles provides the same processing and performance benefits as the CBF12 (12-cavity) while meeting the high-production requirements of pharmaceutical customers.
The CBF20 machine, supplied by Italy’s Sacmi Imola S.C., the industry’s leading manufacturer of compression molding equipment for closures, provides annual production output of 80-90 million containers per year. Compression blow forming is a breakthrough process which combines compression molding and blow molding. It delivers significant advantages over conventional processes, and provides enhanced quality, higher productivity, sustainability benefits, and the potential for lightweighting. This further reinforces compression blow forming’s position as a breakthrough process for the production of pharmaceutical containers, delivering high-quality, reliable and defect-free parts at a higher production level. 
Amcor Rigid Plastics, the world’s leading producer of rigid plastic packaging, expanded its compression blow forming (CBF) platform with the CBF20 machine. Amcor originally collaborated with Sacmi – the original developer of the process – to adapt the unique technology for pharmaceutical packaging. In 2012, Amcor and Sacmi announced the commercialization of the industry’s first CBF machine for the production of rigid HDPE pharmaceutical bottles. Amcor also announced an exclusive arrangement with Sacmi to utilize the technology in select market segments and global regions. Since 2012, Amcor has operated multiple CBF12 units to produce over-the-counter and prescription pharma bottles. The CBF20 started up this past summer for production of a solid oral dose HDPE container.
The CBF20 machine offers several enhancements in terms of processing efficiency and improved mold life. The 20-station CBF unit went from a vacuum-fed material handling system to a gravity system for faster processing and reduced scrap. Mold life was improved through extensive mold design engineering enhancements. Downstream operations such as vision inspection, leak detection, and plasma coating were also enhanced to match the increased production.
In compression blow forming, material is extruded, cut, and precisely transferred into the compression cavity. A preform is produced and a pre-blow and full-blow process is completed in the same mold station with no transfer of the preform. Compression blow forming has no manifold for melt distribution to individual separate cavities, which results in better quality parts because there are no temperature differences and less chance of resin burn and degradation. The process delivers less particulate contamination and due to the continuous extrusion process with simple melt channel, resin and color changes are also quicker.
The pre-blow process allows for effective separation of plastic from the compression core. This reduces the chance of plastic sticking to the metal core rod, resulting in more uniform wall thickness distribution. Weight distribution is also better controlled with compression blow forming. The weight of the resin shot is controlled for all cavities with a servo-controlled melt pump, resulting in more accurate part weight distribution across all mold cavities. The process also operates at lower temperatures, which results in lower residual stress in the end product and cycle times which are reduced.
Key sustainability advantages include a significant energy reduction through lower process temperatures and application of updated machine process improvements. The process achieves thermodynamic stability quicker and makes production bottles within 10 minutes from machine start-up.
Amcor is expanding its flexible packaging operations in China with a RMB 185m (€170m) deal for Hebei Qite Packing. The single-plant operation in Hebei Province has annual sales of more than $28m (€25.6m) and serves domestic food and dairy markets. 
Globally and especially within Asia, China is a very attractive growth market for flexible packaging. Amcor continues to have substantial opportunities to grow its flexible packaging business in the Asian region. This acquisition will enhance Amcor’s attractive platform for growth with new and existing customers in the important Northern region, according to Amcor CEO Ron Delia. The purchase will give Amcor 11 flexible packaging manufacturing sites in China. Once fully integrated, Amcor will have a stronger platform to grow the business in this region.
Source: www.amcor.com