THE INFRARED PROS. Non Contact Infrared Thermometers for the Glass Industry

Transcription

1 THE INFRARED PROS Non Contact Infrared Thermometers for the Glass Industry

2 The Glass Industry Glass manufacturing was one of the first industries to use non-contact temperature measurement. Many of today s non-contact infrared sensor designs evolved directly from the needs and demands of the diverse, and many times harsh processes entailed in the making of glass products in their various forms. Mikron Infrared Inc. has been closely engaged in the creation and design evolution of non-contact temperature sensors for the Glass Industry for over 5 years. Mikron s sensor specifications and protective housing designs are in direct response to the special needs of the Industry, and have progressively taken advantage of the dramatic strides in optics, electronics and detector technology. Melt tank/forehearth Today, Mikron infrared thermometers are to be found globally, in all segments of both primary and secondary glass manufacturing: Automotive and Architectural Container and Fiber Lamp and Lighting Decorative and Tableware Optical Waveguide Production Tempering, Laminating and Forming Non-contact IR fiber optic sensors located on top of forehearth The company now offers the world s most comprehensive, single-source array of fixed mounted and portable non-contact infrared thermometers, along with hand held and fixed thermal imaging systems. In support of its sensors, Mikron also has a range of calibration standards and services that provide traceability, referenced to national standards. IR Fiber Optic Sensor installed near glass gob distribution (exit of forehearth) The following pages will provide you with an overview of Mikron products for the Glass industry, and of applications that have been successfully engineered. More detailed product information, or the location of your Mikron representative, can be found on our website at Glass gob distributor IR Sensor measuring temperature of glass gob Glass bottle forming line

3 Float Glass Process Applications Melting & Refining The melt tank () and refiner area temperature measurement applications are common to many segments of the Industry. The measurement locations are: The furnace crown, the bridgewall, the burner port block, and the molten glass in the regenerator melt tank furnace. Sensors in the region of µ (micron) with and without fiber optics are used in this area. Due to the extreme environmental temperatures, water cooling is necessary for non-fiber optic models. Fiber optic models are used when water cooling is not desirable. Single wavelength ( color) pyrometers are used throughout the Float Glass Process. Float Glass After the melt tank (), the first points of measurement on Float Glass lines are in the Canal Area () followed by the Tin Bath (), which requires multiple measurements to profile the glass. The Canal Area uses a pyrometer with a µ spectral response. Generally a fiber optic sensor is preferred. Sensors in the 5µ spectral response region are used here to sense the glass surface temperature. In the Annealing Lehr (), again sensors in the 5µ region are installed to sense near the edge and the center of the glass ribbon in each of the annealing zones. In the Cooling Zones near the end of the Lehr, and to determine the correct ribbon temperature in the glass cutting location (5), more economical sensors with 8-µ spectral response can be used. Canal Area Melt Tank Tin Bath 5 Annealing Lehr Lehr Exit Glass Cutting Area Bending, Tempering and Sagging In the bending, tempering and sagging applications associated with the secondary processing of flat glass, sensors in the region of 5µ are used to measure glass surface temperature. Other spectral responses have been used to measure temperatures just below the glass surface as a means of preventing skin effect stress patterns.

4 Container & Fiber Glass Process Applications Container Glass and Fiber Glass Container and fiber glass lines have common features in that they both have a melt tank refiner area and a Distributor with several Forehearths. Normally, fiber glass forehearths are longer and therefore have more zones than the container line equivalent. In the Distribution Area () IR sensors in the region of µ wavelength are used to measure just below the surface of the glass at one or more points. Due to extremely hot environmental conditions, fiber optic models are preferred. In the Forehearth (), again fiber optic sensors with µ spectral Container Lines The end point of measurement on a container forehearth is the Gob (). Gob temperature measurement requires a sensor with µ spectral response to sense beneath the gob surface in order to avoid surface cooling effects. For very small gobs, less than 5mm (.0 ) dia., it is necessary to sight up into the orifice to avoid seeing partially through the glass. Generally, IR sensors with fiber optic, or non-fiber optic versions with through-lens sighting or video are used in this location. Single color with short wavelength or Color sensors with through-lens sighting are used for the Plunger (5) measurement to eliminate inaccuracies due to variable surface emissivity. Typically sensors with a speed of response of 0 milliseconds or less are used for gob or plunger temperature measurements. response are used to sense each zone temperature, and measure approximately 5mm ( ) into the glass. On some forehearths, zone temperature is combined with an additional IR thermometer, sighted into a molybdenum tube through the bottom of the forehearth, just before the orifice, to detect temperature gradients in the glass. At the end of the glass conditioning phase in the forehearth, the container and fiber glass processes differ. In the Parison Forming area, Mold temperature (6) is measured with a fixed sensor system and/or a portable M90QFO Thermometer. The M90QFO employs a stainless steel fiber optic wand terminating in a cupped tip. This allows an operator to momentarily touch the mold surface and record up to 0 readings that can be downloaded and analyzed on a computer. A short wavelength spectral response minimizes emissivity variations due to mold age or doping, and in the case of the M90QFO, the cupped tip eliminates reflected energy from hot glass or other molds in the vicinity. Additionally, fixed process sensors with a spectral response of.9µ or fiber optic models with.8µ are used to see through clean flames impinging on the molds. Distribution Area Plunger Melt Tank Gob 5 6 Blank / Mold Temperature Fiber Glass In fiber glass production, the last point of measurement of the forehearth, is at the Platinum Bushing (). A variety of techniques have been used in this final production stage to ensure that correct temperature and temperature distribution across the bushing is maintained. This insures that the holes in the bottom of the Platinum Bushing remain open and unobstructed, allowing Forehearth Parison Forming Area the molten glass to flow. For this measurement, portable or fixed systems with narrow-band, short wavelength spectral response or two color thermometers are used. All non-contact infrared thermometers avoid the errors attributable to electrical or electro-magnetic interference that complicate thermocouple measurements. Melt Tank Distribution Area Forehearth Platinum Bushing UPWARD VIEW OF PLATINUM BUSHING

5 Lamp & Lighting Process Applications Melt Tank (Not Shown) Vello/Danner Process Area measuring points ) Glass Temp coming out of the orifice ) Glass on Sleeve ) Glass on nose 5 Sealing Area Forehearth Cutting/Coating Line Tube Carousel Like Container and Fiber Glass production, Lamp and Lighting only differs in the forming and secondary manufacturing stages. Depending on the glass materials under process such as soda lime, lead glass or borosilicate (quartz) temperatures vary, ranging from approximately 500 C to 00 C respectively. Mikron s Line of IR Sensors at 5 micron spectral response are used to measure glass/quartz surface temperature, whether it is viewed directly or through clean flames. In the case where the glass is luminous, (molten glass), an IR Sensor with a micron spectral response should be used. Glass to Glass, Glass to Metal, Sealing Applications Fluorescent tube Glass to Lead Glass Sealing Process Tube Carousel Accurate automotive lamp glass temperature measurement prevents seal failure and Pinch Die breakage due to low glass temperature Temperature measurement is used to control and prevent a cold seal, rod voids, cracking, and shrinkage. Mikron Infrared Sensors are used to measure glass to lead glass seal on fluorescent tubes. Mikron s non-contact infrared temperature sensors are ideal for monitoring and control of critical processes in the manufacture of incandescent bulbs, fluorescent tubes (mercury/sodium vapor) metal halide and high intensity discharge lamps. Mikron has a variety of products available for lamp/bulb flame sealing, bending, annealing and forming applications including the models M67S with through lens sighting, MI-N5/5+, with laser sighting and the M67SV which has video monitoring capability. For checking filament temperature choose from the M770S a fast, highly accurate Digital -color sensor with variable focussing optics or M770SV which incorporates video capability. The fiber optic model M780 is used in harsh and confined areas. In addition single color fiber optic sensors can be used to measure pinch die temperature, to reduce breakage in automotive lamp glass applications.in addition, the IR Sensor s speed of response should be considered due to the very high speed nature of the Lamp/Lighting Glass Process. 5

6 Mikron IR Products for Glass Industry Applications Materials Measurement Points Mikron Models Molten Glass or Refractory Melt Temp. Canal Area Distribution Area Forehearth GOB µ M67S(H) M90H MI-S5 MI-S5-TV MI-S0 MI-S00 MI-S00 Portable M90H Fiber Optic Models M68 M668 M680(H) MI-S5-LO-GL MI-S50-LO-GL Non-Molten Glass Surface Tin Bath Lehr Lamps Bulbs 5 µ M67S(E) MI-N5/5 MI-N5/5+ MI-N5/5-M+ MI-N5/5-H+ MI-N00/5 MI-N00/5 Portable M90(E) M0GL Metal Surface Blanks Molds Plungers Pinch Die µ M67S(H),(Q),(D) M90(H),(Q) MI-S5 MI-S5-TV MI-GA5 MI-GA5-TV MI-S0 MI-GA0 MI-GA0 MI-GA0 MI-S0 MI-P0 MI-S00 MI-GA00 MI-S00 MI-GA00 Portable M90QFO Fiber Optic Models M68 M668 M680(H) (IN) MI-S5-LO MI-S50-LO-GL MI-SQ0-LO MI-GAQ0-LO Tungsten Surface Filament M770S M770SV (Video Output) M90 (High Resolution Thermal Imaging System) M90 6

7 Mikron Products for Glass Industry Applications MI-N00/5 Glass surface measurement, -wire design, 5.µm spectral response and 00ms speed of response. MI-N00/5 Glass surface measurement, (-wire loop powered design) with service interface. Programmable measuring range, 5.µm spectral response and 0ms speed of response. MI-N5/5 MI-N5/5+ Glass surface measurement, digital pyrometers with analog and digital outputs, 5.µm spectral response, 80ms response time, laser aiming. MI-N5/5-M+ MI-N5/5-H+ Glass surface measurement, high speed version of MI-N5/5+ with 0ms and 0ms response times, laser aiming, spectral range 5.µm. MI-S00 MI-GA00 Good value, small, fast (0ms), medium/high temperature, -wire pyrometers with fixed focus, adjustable emissivity and LED aiming, easy installation. MI-S00 MI-GA00 Fast (0ms), medium/high temperature, digital pyrometers with analog output, -wire design, maximum value storage, programmable measuring range, LED aiming. MI-S5 MI-GA5 Very fast (ms) digital pyrometers with analog output and digital interface. Maximum value storage, adjustable measuring range, laser aiming or through-the-lens sighting or integrated TV camera. MI-GA0 MI-S0 Highly accurate, fully digital fast pyrometer for temperatures between 00 and 00 C. Response times <ms optional 500µs, thru-lens viewfinder or laser targeting. Built-in digital display with temperature indication. MI-S50 LO/GL MI-S5 LO/GL Fiber optic pyrometers for measurement of molten glass for forehearth, feeder and gobs. Adjustable measuring ranges, -wire design, analog output (service interface). Digital with adjustable measuring ranges with 50ms and ms respectively M67S E, D, H Diversified industrially hardened pyrometer with precision upright through lens sighting, focusable optics, adjustable emissivity and easy -wire installation with -0 ma analog output. Speed of response 00ms/00ms/0ms. M68, M668 Fiber optic models for non-contact temperature measurement of inaccessible locations where direct sighting is impossible or where exceptionally high ambient temperatures exist or EMI or RF interference is a problem. Speed of response 0ms and 50ms respectively. M680 H Multi-channel ultra precision fiber optic system. Wide range digital pyrometer with precision optics. Digital output, optional -0 ma analog output, long stainless steel sheathed fiber optic cable lengths and 50ms response speed. M90 H, Q Digital pyrometer with precision focusable optics, 0. C resolution, analog outputs, and adjustable emissivity. Designed for precision process applications. 50ms speed of response. M90 H High accuracy hand-held for spot checks or tripod mounted for rapid and dependable data gathering. Variable focus optical system allows for precision pinpointing of small targets. 00ms speed of response. M90QFO Portable, specifically designed for rapid, easy and convenient measurement of mold surface temperatures between 00 and 500 C. This instrument avoids errors caused by mold surface emissivity and reflected energy. 00ms speed of response. M770S Digital /color pyrometer with precision focusable optics, adjustable slope, alarm relay and temperature display for temperature range F to 6 F. Powerful software for process diagnostics. -0mA and RS85 outputs. 7

8 Protective Hardware Accessories Mikron infrared sensors are inherently rugged and reliable, but for long term accuracy and reliability, the optics must remain clean and the electronics must not be subjected to conditions exceeding ambient temperature specification limits. Mikron's extensive range of protection and mounting accessories make installation simple, keep maintenance to a minimum and ensure optimum performance in the harsh process environment of glass manufacturing. Protective Cooling Jacket Air Purge & Water Cooling Jacket with air purge and aiming flange assembly for MI-00 or MI-N00/5 Sensors for models M67S and M770S Series Stainless Steel Protective cooling jacket with integrated air purge for MI-N5/5+ Sensors Air Purge & Water Cooling Jacket for MI-00/5 Air Purge for MI-00/5 Air Purge Mini Assembly for fiber optic models M68 and M668 Air Purge Assembly for fiber optic models M68 and M668 Air Purge with mounting bracket and ceramic/ inconel sight tube for MI-S50- LO-GL and MI-S5-LO-GL Programming Module Model MI-HT6000 for setting MI-Series sensor parameters Scanning Mirror Assembly MI-SCX Series Mikron Infrared, Inc., Headquarters 6 Thornton Road Oakland, NJ 076 USA Tel: Tel: (USA only) Fax: sales@mikroninfrared.com West Coast Office: Mikron 75 Dupont Court #9 Ventura, CA 900 Tel: Fax: sales@et.com M00 For calibration of all infrared glass industry sensors ranging from 00º C to 50ºC. Visit our websites: Glass Rev. 0 Printed in USA ISO Glass Print Rev