Channel: Research and development
The shape of glass gobs

2010-09-01 | Research and development

-

The shape of glass gobs
The correct shape of glass gobs has an important role in the distribution of the glass in the container during its forming with IS machines. If we want to have the correct composition and good thermal conductivity of the glass in the forehearth and inside the feeder mechanism, the gob must be created with the correct shape, weight and length that are suitable for the container being produced. Taking a small 50 ml., 100-gram, rectangular perfume bottle as an example, we can see the blank mould in Figure 1, which shows a cylindrical gob of glass, which, passing through the funnel, takes on an oval shape, adapting to the inside of the mould. It is clear to see how the glass gob changes shape because of the impact with the mould.
The tip, created by the cylindrical-shaped glass gob and its large dimensions, hits the shoulder of the blank mould on which it stops. The end of the gob bends sideways because of gravity, taking some of the glass with it, facilitated by the empty area that forms between the walls of the mould and the end of the glass gob.
After the settle blow of the baffle, the counterblow takes place inside the parison, enabling the glass to swell and come into contact with the internal surfaces of the mould. Keeping in mind that cylindrical glass gobs are not suitable for this type of article, diverse thicknesses can easily be seen in the upper part of the parison in Figure 2. Consequently, after the final blowing in the blow mould, the small perfume bottle formed...

expand

Article taken from Glass Machinery Plants & Accessories bi-monthly magazine (6 issues per year)
Year: 2010 number: 5
Check out Glass Machinery Plants & Accessories magazine

Research and...
9 Total results
Page  1 of 1 
latestOrder by:
9 Total results
Page  1 of 1 
Other channels: A.T.I.V. Articles - Adhesives and sealants - Advanced electronics - Annealing - Annealing & decorating - Annealing & tempering - Anniversary - Autoglass - Automation and it - Automotive glass - Ball Gathering - Batch plants - Building applications - Case history - Coatings - Cold-end - Company financial news - Company news - Conditioning - Containers - Conveyors - Cooperation - Country outlook - Crystal - Cullet treatment - Cutting technology - Decoration - Design - Detection systems - Directives - Double glazing - Drilling - Drying - Ecology - Edging - Energy saving - Events - Fibre treatment - Finishing lines - Forming - Furnace technology - Fusing - Glazing / Insulating Glass - Grinding and bevelling - Handling - Hot-end equipment - Ig equipment - Industry update - Innovation - Inspection - Institutes - Laminating - Lehrs - Load moving - Lubrication systems - Machinery developments - Manufacturing technology - Markets & trends - Mathematical recreations - Mergers, acquisitions & disposals - Mirror technology - Mould technology - Neutralisation plants - Numerical control - Old issues - Optoelectronics - Other news - Palletising/depalletising - Personnel & industrial relations - Photovoltaic glass - Plant technology - Pressing - Printing and tempering - Processing - Product news - Production costs - Purification plants - Refractories - Representative organizations - Research and development - Resin technology - Safety glass - Science & technology - Screen printing equipment - Sealants - Sector trends - Shaping - Sheet processing - Software - Specialist applications - Statistics - Storage and handling - Surface treatment - Surveys - Tableware - Tempering technology - Testing - Thermal imaging - Thermal insulation - Transitions - Treatment plants - Tube production - Turnkey plants - Viewpoint - Worker safety -

Our Glass Magazines & Annual Guides Read online free of charge

Glass-Technology International
 
Glass Machinery Plants & Accessories
 
World Glass Directory
 
Flat Glass World Directory
 
Return to top

Powered by GlassOnline Logo

Copyright © Smartenergy S.r.l. 1996-2016 - All rights reserved

Smartenergy S.r.l. - publications@glassonline.com - Cookie policy
Registered office: Via Antonio Gramsci, 57 - 20032 Cormano (MI), Italy
Company registry - Milan, REA No.: MI-2022277 | Share capital: € 10,000 | P.IVA/VAT No.: IT 08386450962