An economical solution for electrostatic coating!

High transmission efficiency, minimum powder output and uniform powder coating: powder spraying gun is the core of powder coating. Electrostatic powder coating is a feasible alternative to wet coating, which is suitable for various industries requiring a large number of coatings of the same color. Gema Switzerland precisely coordinates all system components and measurement sensors provided by Lloyd electronics. This helps to achieve economic and ecological coating effects and optimal working conditions.

Quality and ecology are top priorities

In Gema Switzerland, quality and ecology are top priorities. The company has a modern coating laboratory at its headquarters in St. Gallen, Switzerland, and cooperates with customers for coating testing. Test results are effectively incorporated into complex coating system planning to obtain specific customer and customized solutions. Axel Forster, control and Automation Manager of Gema Switzerland, explained: "although Graco group (GEMA Switzerland became a member in 2012) uses wet coatings, Gema Switzerland specializes in powder coatings and is a market leader in this field." Well known chassis, automobile and furniture manufacturers have a large number of electrostatic powder sprayed components in the compartments manufactured by Gema Switzerland, such as engine parts, rims and furniture frames. HTL engineers doing research in Applied Science at lapersville university continued: "this is not only cheaper than wet paint, but also more economical, especially in terms of color uniformity and high dosage, which plays a positive role in protecting the ecological environment."

Reliable component inspection is imperative

All components involved in the powder cycle are coordinated in this way to ensure a continuous and consistent supply of powder. The powder coating itself is carried out in a so-called spraying chamber designed as a sandwich structure. The advantage of this method is that only a small amount of powder is adhered to the indoor wall, and the indoor floor can be cleaned automatically to prevent powder accumulation. The operator controls the powder spraying process through the control panel at the cabin entrance so that only the necessary amount of powder is used, especially where powder is used. This requires reliable detection of components entering the carrier and elements to be sprayed. In the past, it was usually possible to statically detect the size, position and inclination of coated object parts.

Static component detection using measuring light curtain

The CML 720I ex measurement light curtain provided by Lloyd's electronics was and is used for static component detection in Gema Switzerland. The control unit and the interface are integrated in the receiver unit, which means that additional equipment can be omitted. Axel Forster explained that an important premise of his decision is to have a high-quality fieldbus system suitable for CAN bus, in which each independent light curtain represents a CAN node rather than the master-slave concept. The light curtain is parameterized directly through the control system, which stores parameters and facilitates exchange without re parameterization. The calibration mode and bar graph display of received signal strength will be integrated into the display for fast and safe calibration. Due to the short beam response time, even the fast process can be reliably detected. Another important requirement is that due to the high cleaning requirements of the working environment, the light curtain used must meet the strict cleaning requirements. Axel Forster said: "it must have a solid metal housing, explosion-proof device and an easy to read display with a solid membrane keyboard."

Dynamic measurement using optical distance sensor

In various customer cases, when larger objects such as the whole crane shaft need to be detected, static measurement with CML light curtain is no longer feasible. It requires a measurement site length of more than three meters and a range of up to eight meters, as well as higher functional reserves. However, David semprevivo, the main account manager of Lloyd's electronics, also had solutions to these challenges. He cooperated with Gema control and Automation Manager: instead of using the previous CML light curtain, they first tested the rotoscan rod-4 optical distance sensor for protecting objects and used it in Gema coating laboratory

The complex and large components are measured on one side of the easy to measure electronic dynamic measurement task. This device works much like an area scan sensor. It scans the front area in an optical and non-contact manner, so as to realize the full coverage detection of the object. The beam is deflected through a rotating mirror and sprayed to a 190 ° semicircular area with a radius of 50 meters. The area is divided into two detection areas, each with a radius of 15m. A protected area can be freely defined in each protected area. The detection area pair can be saved and switched in rod-4. You can define different heights or protrusions. Rotoscan continuously measures its environment and uses the serial interface to provide measurement data for further processing. At Gema Switzerland, this function is dedicated to contour detection of shrink carriers and components to be sprayed. In addition to better hyperopia, optical scanners can also improve height control due to different detection area sizes. Therefore, this is a "Parking Aid" for the spraying room.

Solutions that also meet security requirements

Two years ago, dynamic measurements using rotoscan optical distance sensors were first tested in the Gema project in the Czech Republic. So far, scanners have become part of Gema Switzerland's standard product family. The project participants agree that, similar to the tasks and requirements they jointly solved in the past, they will also solve the security requirements together in the future. The safety model of Lloyd's electronic optical scanner is called RSL 400, which can conduct 270 ° safety monitoring in full coverage.

Participating companies

GEMA Switzerland GmbH (CH)

Headquartered in St Gallen, Switzerland, Gema Switzerland GmbH is an international market leader in electrostatic powder coatings. From simple manual spraying to fully automatic powder spraying, the company can provide innovative solutions worldwide to meet the requirements and needs of customers in different industries. Gema Switzerland has been a member of the Graco group since 2012 and is one of the world's leading manufacturers of liquid treatment systems and components.

Leuze electronic GmbH + Co. KG, Owen

With more than 50 years of rich experience, Lloyd electronics has become an expert in providing innovative and efficient sensor solutions for industrial automation. The application fields include logistics, packaging, machine tools, automobile and laboratory automation. It has rich product lines, mainly including switching value sensor, measurement sensor, automatic recognition system, image recognition and processing system, data transmission / control module and safety protection sensor.

Founded in Germany in 1963, Lloyd's electronics currently has 5 production bases, 18 own subsidiaries and 42 sales partners around the world. With its extensive sales and service network, professional technical consultation and reliable customer service, Lloyd's electronic realizes its brand commitment to customers: smart sensor business Smart is easy to use, sharing experiences, being close to customers and creating the future.

HY automation Shenzhen Hongyuan Automation Control Co., Ltd. is an integrated enterprise integrating sales, installation and maintenance, multi-channel and multi brand, massive inventory, wholesale and retail.

Shenzhen Hongyuan Automation Control Co., Ltd

Shenzhen Hongyuan Automation Control Co. Ltd.

Address / add: 201, building B, Huaqiang Building, Songbai Road, Guangming District, Shenzhen

201, building B, Huaqiang Building, Songbai Road, Guangming District, Shenzhen

Tel / pH: 0086 755-23033831

Fax: 0086 755-23033832

E-mail:   1330130136@qq.com

Use of products

Industry / field

Machine tool (sheet metal processing)

task

Quality control, size, profile, volume,

application

An economical solution for electrostatic coating!