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

Chinese mold makers say they don't worry about reshoring trends

September 23, 2014 12:05 pm ET

Reshoring may be a hot topic in U.S. manufacturing circles, but the mid-level and small players putting in appearances at this year's AsiaMold in...    More

Image

Italy's machine sector seeing growth

September 23, 2014 11:02 am ET

Italy experienced a rise in imports and exports of rubber and plastics equipment in January-June this year, said Assocomaplast, the trade association ...    More

Image

Hong Kong's TK eyes expansion, may buy Nypro Tool operation

September 19, 2014 2:49 pm ET

Hong Kong-based mold maker and plastics processor TK Group (Holdings) Ltd. said it's reached a tentative agreement to buy a tooling factory in...    More

Exo-s buys injection and blow molder in Mexico, expands footprint

September 19, 2014 2:15 pm ET

Custom molder Exo-s Inc. has bought an injection and blow molding operation in San Juan del Rio, Querétaro, Mexico.    More

Image

Foster building medical polymers plant

September 19, 2014 1:39 pm ET

Foster Delivery Science is investing $8 million in a new plant in Putnam, Conn., for production of medical polymer blends, as well as rods, film or fi...    More

Market Reports

Plastics Caps & Closures Market Report

The annual recap of top trends and future outlook for the plastics caps & closures market features interviews with industry thought leaders and Bill Wood’s economic forecast of trends in growing end markets. You will also gain insight on trends in caps design, materials, machinery, molds & tooling and reviews of mergers & acquisitions.

Learn more

Shale Gas Market - Analysis of North American Region

This report highlights the impact of shale-based natural gas on the North American plastics market and features an in-depth analysis of production trends in the United States during 2013 and a forecast for 2014 and beyond.

Learn more

Thermoformed Packaging 2014 Market Review & Outlook – North America

This in-depth report analyzes economic and market trends, legislative/regulatory activity impacting supply and demand, business opportunities and threats, materials pricing, manufacturing technology, as well as growth strategies being implemented by thermoformed packaging companies.

Learn more

Upcoming Plastics News Events

January 14, 2015 - January 14, 2015Plastics in Automotive

February 4, 2015 - February 6, 2015Plastics News Executive Forum 2015

More Events