Pyrotek hanger inserts can help eliminate glass container seams

Seams in glass containers are a defect that can affect the quality of a container. Several factors contribute to seam creation, including the way hangers close, heat and cleanliness.

Types of seams include neck-ring seams, a protruding seam of glass that runs vertically from the body of the container up to the finish.Baffle marks, meanwhile, can include a rough or damaged baffle seam on the bottom of a container. Pressure checks are cracks through a container’s wall that can appear at a seam. Blank and mould seams typically extend from a container’s shoulder to its base. They can appear on a container’s body, edge or side. The severity and quality impact of seams depend on the manufacturing process.

Mould, blank, neck and heel seams are generally created when the hangers and inserts used in individual section (IS) machines fail to close precisely. Over time, hangers, especially blank hangers, can warp, which further prevents the inserts from closing completely. One major glass container manufacturer using triple gobs wanted to remove those seams and any potential defects resulting from them. The hanger inserts were held in place with four pins, which required extensive machine downtime and effort to replace.

The solution was a modified hanger insert design that utilizes a single pin, allowing the inserts to “float.” As a result, the hangers were able to close completely with equal pressure, even if a hanger warped, thus removing seams. The single-pin design allowed the inserts to be replaced much more quickly, within minutes, lessening downtime.

The hanger inserts the container glass operation had been using typically would last six months or less, whereas the newly designed hanger inserts lasted two or more years.

To extend insert service life, periodic cleaning is recommended. Eventually, the oil used to keep mould equipment lubricated can harden, leading to crust buildup on inserts, affecting the smoothness of its movement. Pyrotek, which acquired the patented single-pin hanger insert modification technology earlier this year, is researching other applications for container glass manufacturers.

www.pyrotek.info/glass

Top, IS machine hangers with inserts. Left to right, glass containers with visible seams.

600450 Pyrotek hanger inserts can help eliminate glass container seams glassonweb.com

See more news about:

Others also read

Bohle America is pleased to announce the continued availability of their full line catalog that features everything a glass professional needs.
Vitro Architectural Glass (formerly PPG Glass) has launched an online guide to help architects understand how their projects can earn LEED® (Leadership in Energy and Environmental Design) credits when they use products by Vitro Glass.
The North American Contractor Certification (NACC) program is pleased to announce that it will host its first industry webinar for technical discussion at 2:00PM EST on June 28th, 2017.
Wingate Partners, a Dallas, Texas based investment firm, announced today that it has partnered with CEO Tim Curran and management to acquire Binswanger Glass, headquartered in Memphis, Tennessee.
The Synseal Group has today acquired the Domestic IGU manufacturing assets of Euroview Manufacturing Limited – trading as Village Glass.
Leading international building envelope and major façade specialist the Lakesmere Group has announced a structured management buy-out (MBO) of the company by its executive management team.

Add new comment