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Glass

Glass

CMS—The Clear Vision for your Future

CMS North America (CMSNA) brings 30-plus years of experience and innovation to the glass machining market. We offer complete solutions for high-speed glass production, with a full line of state-of-the-art CNC glass cutting machines and a staff of highly skilled professionals who help make us the industry’s premier CNC systems manufacturer. We emphasize a no-limitations approach to each project, and work to develop the ideal solution for each machining challenge.

 

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Overview

How we got hereGlass—how we got here

Glass—discovered over 4000 years ago, considered precious, was used by royalty as well as for religious purposes. Glass making reached a high point during the time of the Romans both in terms of quality and practical usefulness. By the 7th century Syria had understood the methodology for forming flat glass based on molten "blobs" of glass being spun on a disc using centrifugal force to cause them to flatten out, a method that would last for most of the next 10 centuries. Stained glass emerged from the Middle Ages as the main contribution of that period.

The process of making "sheet glass" early in the 1900's was carried out by a glass "ribbon" vertically from a pool of molten glass. The process, while a step forward, provided a sheet which had distortion problems due to variations in the viscosity of the molten mixture from which it was drawn.

A pane free from distortion—something truly necessary for window openings of different types in moving vehicles—required a differently process to be developed and such was the case with the development of "plate" glass obtained by flattening molten glass on table via a rolling action, then grinding and polishing it until acceptable results were obtained. For the most part, this process is no longer used in the United States.
 

Modern glass - the float glass processModern glass - the float glass process

Float glass made it's appearance In 1959. The process of making "float" glass begins with molten glass flowing from the furnace in which it has been prepared by gravity, from which it is displaced onto a sea of molten tin and in the process forms as an unbroken "ribbon". The ribbon of glass is drawn through the "sea" of tin on which it is "floated" and at its exit is guided, while being supported on rollers, through an annealing lehr, and in this part of the process is cooled under controlled conditions till at its conclusion it's almost at ambient temperature.

The character of float glass is such that it is almost colorless and freely transmits light with an efficiency of from 75% to 92%, depending on thickness. In addition, float glass at the end of the process is flat, fire-finished and its surfaces, for all practical purposes, are parallel and ready to be processed and machined via modern CNC cutting tables and machining centers.
 

Heat treated glassHeat treated glass

Float glass may undergo a process called "heat treating" in order to meet certain standards required for safety glazing applications. In this subsequent process the float glass, typically used for architectural glass purposes, is cut to its required sizes first, then moved through a furnace to achieve a uniform temperature of about 1150° F. 

At the end of the process the glass leaves the furnace and is cooled quickly via blowing air on both of its surfaces at the same time, which locks the surface state in "high compression" and the interior state in one of "compensating tension". These zones are about 20/60/20 in their relationship to each other, with the outside surfaces being about 20% of the glass thickness and the interior 60%.

The basic characteristics of the glass are not altered with its heat treatment, while those of its physical properties are improved—flexural and tensile strength and increased resistance to thermal stress and shock, while at the same time the heat treatment does not reduce its deflection property for any specific load.
 

Glass - strength for design and structural useGlass - strength for design and structural use

Glass has emerged with increasing popularity for the possibility of its use in minimally supported applications, such as glass canopies and balustrades, or stairways which find their way into many commercial construction projects. 

Such applications require designers to confirm that the use of glass meets the appropriate design loads. The strength characteristic of glass assumes an important role in choosing the best glass design solution for a project. There are a number of reference tools available to help in this process.

The ASTM International’s ASTM E 1300 Standard Practice for Determining Load Resistance of Glass in Buildings, was developed to help people design with glass. This standard describes procedures for determining load resistance of different types of glass for a specified probability of breakage. The standard includes design charts for such types of glass as monolithic, laminated and insulating glass constructions with one, two, three and four-sided support conditions.
 

Industries
served

Glass - Flat panel applicationsGlass - Flat panel applications

The use of glass in the housing and construction industries continues to find new flat panel applications such as: shower doors and enclosures; furniture tops, counter tops, entry doors, beveled mirrors, grooved shelving and even decorative glass...
 

Commercial Glass - OverviewCommercial Glass

Using glass as a building material has become increasingly popular in the recent years...more and more glass is being used in construction. With today’s technology, less metal is required to fasten the glass to other substrates... Glass is also being used as a feature in many instances.

CMS/Brembana's complete range of cutting tables, vertical and horizontal CNC machining centers, double edgers, automatic handling systems, and more, covers the range of machining processes required for today's manufacturers...

Machine
technology

CMS/Brembana has the complete range of glass processing machiney required for today's glass manufacturers. 
 

Runner - Glass Cutting TableGlass Cutting Tables

CMS/Brembana's line of cutting tables features ease of the loading/unloading operation and comes with 2 or 3 interpolated axes for straight and shaped cutting of flat glass plates which range in thickness from just 2 or 3 mm to 25 mm.






 

Maxima - horizontal machining CNC centerHorizontal machining CNC centers

CMS engineers reliability and strength into all of its Brembana glass machining systems. CMS provides ruggedly constructed, open-top, monobloc structures with lower worktables, making it easier to machine, shape, and cut large flat glass. We offer one of the best 5-axis CNC machines in the industry, with a 40 HP spindle that can handle any machining task.

CMS/Brembana's CNC machining centers are available with up to 5 or 6 axes for machining glass and similar materials.

 

Vertec - vertical processing glass CNCVertical processing glass CNC's

CMS/Brembana's line of vertically oriented CNC's is among the first to be offered for this revolutionary new technology for drilling/drilling-milling, and "grinding, milling, boring" processing operations for processing glass sheets.








 

Futura P - double edging glass machineDouble edging glass machines

CMS/Brembana "Double edgers" are machines that make a finished edge on two opposite sides of a glass panel at the same time. Double edging machines can be equipped with both cup wheels and peripheral wheels. 

​"Double edger" machines are limited to rectangularly shaped pieces, although some models can carry out work on trapezoidal parts. Double edger systems can also be configured based upon the shape and amount of space available in the customer's factory. Straight, L-shaped and U shaped double edger lines are configurable according to the customer's requirement.


 

Idroline S - waterjet cutting for glassWaterjet cutting systems for glass

CMS/Tecnocut's line of hydro-abrasive waterjet cutting systems is a perfect application for a wide range of glass cutting needs required for the glass industry today.

CMS/Tecnocut's newest generation of cutting robots, is designed with a structure perfectly adapted for water-jet cutting technology, ensuring the best technological and productive performance.
 

Videos

Processing laminated "heavy glass"

A piece of "heavy laminated glass" is machined, with dimensions of 3210 x 2400 x 30 (15+15) mm thick.

Profile, a vertical CNC machining center for glass, is resting the part to be worked at 5° from true vertical.

The video shows the steps of the process as follows:

  • Automatically measuring the height
    Glass with a weight greater than 580 kg (1276 lbs.) is held by Profile's vacuum cups which are automatically selected.
    • NOTE:  Profile does NOT rest the "heavy glass" panel on the machine's infeed rollers, but vacuum clamps and holds the part just slightly above the rollers (see the paper slipped between) so that premature wear out of the rollers is avoided, as well as compromising edge quality which would occur during CNC processing, if the panel were left to rest on the rollers.
  • Selection of tools
  • Pre-wash of suction (vacuum) cups to guarantee cleanliness and a perfect vacuum
  • All 4 edges are processed in 5 passes: processing with 3 diamond wheels + 1 resin + 1 polishing
  • Views of rough, medium, fine, resin and polishing

 

Vertec - Cardinal Glass case study shower doors

The Cardinal Shower Enclosures case study gives an overview on how CMS/Brembana's Vertec vertical glass processing technology impacted their production operations: time savings on producing their components, ease of information input, ease of loading the machine.

Cardinal provides an explanation of how the machines works and it's impressive technology for hole drilling from both the front and the back, along with its "halo flood" technology (in which the part is kept 1 mm from the "halo" and rides on a cushion of water from both front and back) guaranteeing good holes without any possible scratching of the surfaces.

Cardinal also explains remake levels have decreased and productive volume has increased.
 

Futura P - full flow through line with 2 double edgers

CMS/Brembana's Futura P flow-through double flat edge processing line for glass sheets is shown in this video. The size of the sheet being processed is 1600 x 900 x 10 mm, with 330 parts per hour flowing through the line.

Futura P has over 250 such installations world-wide—an indicator of its reliability and high end performance capability.

Futura P has the following capabilities—and is a system which can be adapted to meet any customer's specific needs: 

  • complete management of the machine from the operator panel
  • automatic infeed loader from vertical glass rack
  • tilting loading table
  • automatic intermediate bar to support wide panels
  • 1st machine
  • configurations of from 8 -12 spindles
  • 1st 90° transfer to 2nd machine
  • 2nd machine
  • squaring system
  • arrises width and polishing wheels pressure management from the operator panel
  • 2nd 90 degree transfer
  • Automatic unloader, returning the sheet to a vertical position again

 

Automated Flat Panel Processing—CMS Brembana KART+FT Double Edger+Vertec+Triulzi Washer

Automated flat panel processing is illustrated for commercial glass requirements.

The line is automatically loaded with sheets from a vertical glass rack and the processing of two of its opposing sides is carried out at the same time with horizontal placement of the sheet on a Futura T double edger, following which it is automatically transfered in an uninterrupted fashion with vertical orientation to a VERTEC for processing of holes and drilling operations, followed by a proper cleaning at the end through a Triulzi Washer system with the parts being finally unload into a storage cart.

Files

Glass Technology - Cutting tables
(Click folder to download)

 

Glass Technology - Double Edging machines
(Click folder to download)

 

Glass Technology - CNC machining centers
(Click folder to download)

 

Glass Technology - Waterjet cutting system
(Click folder to download)