Vacuum Technology for Handling Special Glass and Display Glass

The market for displays is undergoing rapid growth. Not only are the displays getting larger and larger with an increasing number of integrated functions, but also the requirements for vacuum technology are increasing steadily. The glass is getting thinner and the coatings more complex and sensitive. From processing after raw material production, to cutting, grinding, coating and the various assembly processes, the output quantities are constantly increased.

This leads to high requirements not only for a gentle, mark free handling, but also high acceleration rates and high positioning accuracy.


Schmalz (Shanghai) Co., Ltd.
No. 1 Chunquan Road
Pudong, Shanghai, China
ZIP: 201210

T: +86 21 510999 33
F: +86 21 503988 82
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Requirements for Vacuum Technology

Highforces and maximum acceleration rates
These handling processes require minimal cycle times. The glass also has to be gripped quickly and then handled safely and precisely with high acceleration rates. Schmalz’ specially designed thin glass gripper STGG has a large suction area to absorb high shear forces for fast, highly precise handling of glass.

Gentle, contamination-free handling
Any contamination of the glass – before or after the coating – significantly affects the functionality of the displays. For this reason, the grippers STGG are equipped with a contact surface made of contamination-free PEEK. The large suction area of the grippers enables a high suction force to be generated with low vacuum levels. This allows handling with low surface pressure. In addition, Schmalz offers a broad range of suction cups made oft he markless material HT1, that leaves no visiblemarks. The inner support structure oft he suction area of the suction cups SGPN makes it ideal for thin glass.

System availability and low energy costs
These handling processes require short cycle times. The compact ejector SCPSi offersan integrated suction and blow-off function. This minimizes suction and release times, as well as energy consumption. The integrated automatic air-saving function means that the ejector is only activated when vacuum is needed. In addition, the intelligent compact ejector features an IO-Link interface for reading out process data and configuring the ejector. The small size of the ejector allows it to be positioned close to the suction cup for minimal evacuation times.

Flexible handling in assembly processes
The large-area gripping systems FXP/FMP grip a large area of the glass. This generates only a low local surface pressure so that even sensitive coatings or imprints can be handled without damage. An optionally available protective coating minimizes contamination. The integrated valve technology means that the grippers can handle even workpieces that are smaller than they are, allowing different glass workpieces to be gripped flexibly. The gripper FXP also offers an integrated vacuum generator based on the Venturi priciple.

Low-contact handling
By taking advantage of the Bernoulli principle, SBS floating suction cups allow you to handle workpieces with very little contact. The suction cup floats on an air cushion, and horizontal forces can be transmitted by means of an elastomer buffer made of HT1. High flow rates combined with low vacuum permit gentle handling and long-range effectiveness for safe separation of glass sheets.

Products for the Special Glass and Display Glass Sector

Thin Glass Grippers STGG

  • Suction area: 100 x 55 mm and 170 x 105 mm
  • Material suction area: PEEK
  • Suction rate: 31 to 235 l/min

Flat Suction Cups SGPN

  • Diameter: 15 to 40 mm
  • Material: FPM, HT1, NK, SI
  • Connection nipple plugged into elastomer part

Compact Ejectors SCPS / SCPSi

  • Suction capacity up to 67 l/min
  • Max. vacuum: 85 %
  • Body made of plastic

Vacuum Area Gripping Systems FXP/FMP

  • Universal gripper for automated palletizing / de-palletizing, commissioning and sorting
  • Dimensions: 442 x 130 to 1,432 x 130 mm
  • Sealing element: sealing foam, suction cup

Floating Suction Cups SBS

  • Diameter: 20 to 120 mm
  • Holding force: 2.0 to 104.0 N
  • Rubber buffer on the bottom side of the suction cup