Folded Bellows
Perfect Machine Protection For Man And Machine
Hennig has designed and manufactured folded bellows for machine tools for more than 50 years.
Our range of products include simple dust protection, material handling bellows, sophisticated designs featuring extension systems and/or lamellas, as well as special designs for laser machines. Bellows are available in a variety of carrier materials including Nylon, Polyester, Kevlar and Nomex, with coatings including Kevlar, Neoprene, Hypalon, Teflon & more.
Our customers include nearly all renowned machine manufacturers. To maintain our high quality standards, all materials are checked and developed by our own R&D department. Hennig offers excellent productivity and security for your machine.
Advantages of Hennig Bellows:
• Maximum functional reliability
• Tailor-made solutions
• Maximum durability
• Proven components
• Minimum service requirements
• Long-term supply of spare parts
Designs
Heat-Sealed
The optimum design for bellows is the heat-sealed version. The cover material and guide frames made from PVC are permanently joined. The connection of the bellows material and the guide frames ensures maximum loading capacity and absolute tightness against liquids such as cooling or grinding fluids. For special requirements, e.g. resistance to temperatures of up to 752 °F (400 °C), stitched bellows can be used. Heat-sealed bellows can be manufactured in widths of up to 3 meters.
Round Bellows
We make bellows with round, oval or rectangular (with rounded off corners) cross-sections using a special sewing method. Support rings will be used to meet special requirements and applications. Due to their robust design, these bellows have a long and reliable service life, even under extreme mechanical and dynamic strain. The temperature resistance of these bellows can be increased to approx. 752 °F (400 °C) when using an aluminized fabric.
Glued Bellows - Can Be Adapted to Any Shape
These bellows consist of up to three foils glued together in sandwich construction. Special shapes such as polygonal bellows, bellows with negative folding in the opposite direction, or bellows with small fold widths, can be easily constructed. Due to the special gluing of materials, these bellows provide maximum protection, even against liquids.
Fixed Steel Lamellas – A Solid Solution
Hennig has developed lamella bellows to meet particularly high requirements. This type fills the gap between telescopic steel covers and conventional bellows. The lamella bellows are based on our heat-sealed or stitched designs. Each fold has its own guide frame which is sealed to the cover material. Lamellas made from stainless steel protect the bellows against red hot, sharp-edged swarf, or mechanical strain.
Hinged Steel Lamellas – If Space is Limited
Do you need vertically mounted bellows? Without lamella overhang? In such a case our bellows with hinged lamellas are the perfect solution for you. Each lamella is flexibly fixed to the PVC frame. Therefore, the lamellas can lie down flat on the machine enclosure at the bottom.
The Perfect Combination – 3-Sided Lamellas
These folded bellows feature lamellas on three sides combine the advantages of telescopic steel covers with folded bellows. Due to this combination of folded bellows and telescopic steel cover, the bellows are protected on each side, against hot, sharp chips or mechanical strain. Thanks to an ideal ratio between the extended and the compressed length, and compact dimensions because lamella has no overhang, this type of bellows is perfectly suited to limited space applications.
Special Designs
Special Designs
With today's high-speed machines, heavy demands are placed on bellows. Hennig customers can choose between various design solutions to meet those demands. With the use of the following elements, service life can be greatly increased.
Special Solutions
There is nearly no limit to the use of Hennig folded bellows. Our range of products provides an ideal solution for each application. We will assist you with pleasure in solving complicated tasks.
We are in fact experts for tailor-made solutions!
Scissors
Scissors are used for high traversing speeds. This allows an even extension of all elements; across the whole extension length. As a result, the folds are less strained and the durability of the bellows is prolonged.
Rollers
Rollers are used in large and heavy bellows with extension limits. They minimize friction and ensure excellent running properties.
Half Scissors
The advantage of half-scissors is that the individual elements can be extended successively depending on the necessary extension length. Since the folds are not loaded up to the theoretically possible extension limit, the durability is also longer.
Generally, Hennig bellows consist of a bellows cover, guide and end frames. Bellows with large extension lengths are composed of various elements which are connected by intermediate frames. Regarding the choice of material for frames and bellows, we can meet nearly all customer requirements.
Intermediate Steel Frames
Intermediate steel frames are used to connect the various elements, especially when extension limit systems are required. The intermediate frames are fastened to the bellows with a clamping rail. The intermediate frames can be guided by either plastic or brass rollers or gliders.
Guide Frames
The guide frames provide the bellows with the necessary stability and enable a precise operation, even at high speeds. They are made from PVC and are directly attached to the cover. The shape of the frames is adapted by Hennig to the design required.
End Frames
End frames, made from steel or aluminium, connect the bellows with the machine. Hennig offers various fastening solutions for the adaptation to different bellows and machine interfaces.
Horizontal Cross-Rail
The horizontal cross rail system allows Hennig folded bellows to be used in a vertical application by bearing the weight of the bellows on an internal rail system.
Materials
The covers of HENNIG folded bellows are exclusively made from high-quality coated fabrics. We select the cover material and processing according to the operating conditions. Decisive factors are the mechanical and thermal strain of the bellows as well as the type of swarf and aggressivity of the agents used. Exact details of the materials may be gathered from the table of materials.
Most commonly used materials coatings:
POLYURETHAN (PUR):
Temperature resistance up to 120°C
Aluminized:
Aluminium-coated Nomex temperature resistance up to 400°C (only for stitched version)
NOMEX®:
Flame-resistant material, suitable for laser applications
POLYVINYLCHLORID (PVC):
Material does not continue burning after energy application (self-extinguishing)
TEFLON®-POLYTETRAFLUOR-ETHYLEN (PTFE):
Anti-adhesive, high-chemical and thermal resilience, dirt-/water-repelling, corrosion-proof
Mounting Options
Half Fold
Most common & cost effective
Limits extension of first fold to allow for outside mounting.
Full Fold
Allows for full extension of first fold for inside mounting.
External Flange
Allows for full extension of first fold with outside mounting
above bellows.
Velcro
Supplied with adhesive backed velcro fastener for simple & quick inspection of machine components (dry applications).
Half Fold with Lamellas
Most common & cost effective.
Limits extension of first fold to allow for outside mounting.
Full Fold with Lamellas
Allows for full extension of first fold for inside mounting.
External Flange with Lamellas
Allows for full extension of first fold with outside mounting
above bellows.
Downloads
This worksheet will help you submit a Request-For-Quote for your specific application.
All of your specifications, project requirements and dimensions can be entered to obtain the most accurate quote for your project. Worksheet is interactive: simply fill in the PDF fields and email to the Hennig Sales Department for a fast quote.
Contact
Your Contacts in the Hennig Sales Department
Territory | Contact | Phone | Email Address |
|---|---|---|---|
AK, AL, AZ, CA, CO, DE, FL, GA, IA, ID, MD, MT, NJ, NM, NV, NY, OR, PA, TN, UT, WA, WI, WY |
Andrea Andrews |
815-316-5126 | |
AR, IL, S. IN, KY, LA, E. MO, MS, OH, OK, TX, WV |
Susan Block |
815-316-5122 | |
CANADA, CT, IN, KS, MA, ME, MEXICO, MI, MN, W. MO, NC, ND, NE, NH, RI, SC, SD, VA, VT |
Jeff Martindale |
815-316-5141 | |
All Way Cover Repairs and Service, All Locations |
Steve Scantlin |
815-316-5124 |