Parison control improves blow molding

By Bill Bregar
Senior Staff Reporter

Published: November 16, 2012 6:00 am ET

Related to this story

Topics Materials, Blow Molding, Suppliers

PITTSBURGH (Nov. 16, 11:50 a.m. ET) — A variable-speed drive and parison control for extrusion blow molding can greatly improve quality and reduce power consumption, Kim Shipway, technical sales manager for Invensys Eurotherm USA, said at the Society of Plastics Engineers’ Blow Molding Conference.

Closed-loop parison control is important because the weight of the parison hanging down will elongate the parison, resulting in a thinner top portion and thicker bottom, he said. Also, cooling time is reduced if the thickness is uniform.

Parison control can be used on major types of blow molding machines, including time-based continuous extrusion machines, accumulator-head machines and wheels. It gives real-time results and links the machine with downstream equipment such as weighing, vision and leak detection.

The machine also provides an alert when it needs maintenance, he said at the Oct. 9-10 conference in Pittsburgh.

Shipway said variable-speed drive of the clamping unit can pay for itself. It scales down when power is not needed.

Invensys Eurotherm USA is based in Ashburn, Va.


Comments

Parison control improves blow molding

By Bill Bregar
Senior Staff Reporter

Published: November 16, 2012 6:00 am ET

Post Your Comments


Back to story


More stories

Image

Huntsman closing four pigment plants

March 5, 2015 3:36 pm ET

Huntsman Corp. is closing four plants — three in the U.S. and one in Germany — that make pigments for plastics and other markets.    More

Image

LiquiForm looks to fundamentally change blow molding process for bottles

March 5, 2015 12:13 pm ET

Those in the know are lifting the veil, just a bit, on fledgling technology being developed that would fundamentally change the way plastic bottles...    More

Image

Southeastern Container closing plant as Coke shifts bottle production

March 5, 2015 11:07 am ET

About 50 people will lose their jobs at a PET bottle making facility in Effingham, Ill., as container manufacturing shifts to Coca-Cola bottling...    More

Image

Mold maker Moldworx building in Arizona to bring in more molding

March 5, 2015 10:13 am ET

Moldworx LLC has begun leasing more space in Gilbert, Ariz., to allow it to grow its injection molding business.    More

Image

Bayer to stop MDI production in Brazil

March 4, 2015 9:21 am ET

Bayer AG's Bayer MaterialScience plans to stop production of MDI polyurethane at its plant near Rio de Janeiro in July, removing 55 metric tons per ye...    More

Market Reports

Flexible Packaging Trends in North America

North America represents about 30 percent of the global consumption of flexible packaging. Annual growth in this region is forecast at 4 percent during the next 5 years.

For more insight on growth opportunities, drivers of growth and the outlook for 2015, download this report.

Learn more

Plastics Recycling Trends in North America

This report is a review and analysis of the North American Plastics Recycling Industry, including key trends and statistics based on 2013 performance. We examine market environment factors, regulatory issues, industry challenges, key drivers and emerging trends in post-consumer and post-industrial recycling.

Learn more

Plastics in Mexico - State of the Industry Report

This report analyzes the $20 billion plastics industry in Mexico including sales of machinery & equipment, resins and finished products.

Our analysts provide insight on business trends, foreign investment, top end markets and plastics processing activity. The report also provides important data on exports, production, employment and value of plastics products manufactured.

Learn more

Upcoming Plastics News Events

June 2, 2015 - June 3, 2015Plastics Financial Summit - Chicago 2015

September 16, 2015 - September 18, 2015Plastics Caps & Closures - September 2015

More Events