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Thermic-welded flat bellows: more safety for machine tool guides

The P.E.I. thermic-welded flat covers guarantee optimal protection for any type of machine tool thanks to the different shapes and the high-quality of the materials. The selected materials are wear-proof and heat-resistant, making the standard P.E.I. thermic-welded covers ideal for protecting the parts of machine tools.

P.E.I. thermic-welded flat bellows are composed of:

  • Bellows (1): fabrics resistant to water, oil, coolants, dust and shavings.
  • PVC supports (2): give rigidity to the entire bellows and are cut to fit according to the profile of the customer’s guides.
  • Connection flanges (3 and 4): for simple attachment to the machine.
Data

Data

Flat protective bellows without laminations

Definition of data for the calculation of the closed length of PEI thermic-welded flat bellows

P.A. = Open length

P.C. = Closed length

LC (Stroke) = Open length – closed length

Ap = Open fold

B = Bellows width

a = Bellows height

x = Fold height

Formulae
Flat protective bellows without laminations

Indicative formula for calculating the closed length of thermic-welded flat bellows

Contact our technical department

Flat protective bellows without laminations

Example of calculation

  • * We hypothesise the material of the bellows with the code “TEMAT015”
  • ** We hypothesise that the thickness of the support is 1 mm
  • *** We hypothesise that the thickness of the flange is 2 mm

* See list of materials

Standard Materials

Standard Materials

The fabrics selected by PEI have excellent mechanical resistance and resist bending or folding that might occur during operation in the machine. They have excellent resistance to petroleum products, oils and strong abrasion, small welding splashes or incandescent material.

Main strength characteristics of the bellows materials:

Fabric material codeDescriptionThickness
(mm)
Heat resistancePrimary resistance characteristics
Visible sideFabric insertInternal sideMomentary contact °CContinuous
min. °Cmax. °C
TEMAT 106PtfePolyester0,30+200-30+120
Excellent resistance to oils and chemical products. No adhesive surface. Low friction coefficient. Excellent chemical inertia. Excellent resistance to abrasion and bending strength. Mainly used in grinding machines.
TEMAT 015PolyurethanePolyesterPolyurethane0,25+200-30+ 90
Excellent resistance to petroleum products, oils and heavy abrasion. Excellent bending strength.
TEMAT 151PolyurethanePolyesterPolyurethane0,35+200-30+ 90
TEMAT 164PolyurethaneKevlar*Polyurethane0,35+350-30+180
Excellent resistance to petroleum products, oils and heavy abrasion. Excellent bending strength. Excellent mechanical strength. Kevlar also has excellent shear strength. Normally used when there is heavy mechanical stress, a large amount of sharp shavings, and at high temperatures. Self-extinguishing.
TEMAT 165PolyurethaneNomex*Polyurethane0,36+300-30+130
Excellent resistance to petroleum products, oils and heavy abrasion. Excellent bending strength. Excellent mechanical strength. Good resistance to minor welding splatter or hot material. Widely used in laser cutting machines.
Self-extinguishing.
TEMAT 169PolyurethanePanox*/KevlarPolyurethane0,33+300-30+130
Excellent resistance to petroleum products, oils and heavy abrasion . Excellent bending strength. Excellent mechanical strength. Good resistance to minor welding splatter or hot material. It may be considered as the best fabric on the market for use in laser cutting machines. Self-extinguishing.
TEMAT 017PVCPolyesterPVC0,36+100-30+ 70
Mainly used around heavy ambient dust, minor splatters of coolant and oil. Also suitable for use around acids.
TEMAT 020PVCPolyesterPVC0,25+100-30+ 70

SPECIAL MATERIALS are also available for specific jobs. Contact our technical office.

Materials for the attachment flanges
Materiale supportiDescriptionWidth (mm)Note
PVC 05PVC0,50Bellow lenght (B) until 300 mm
PVC 10PVC1,00Bellow lenght (B) from 301 to 700 mm
PVC 15PVC1,50Bellow lenght (B) from 701 to 1500 mm

The PVC support, designed to measure with the shape of the customer’s guides and welded to each fold of the bellows, gives the heat-sealed bellows excellent stability.

Flange MaterialDescriptionWidth (mm)
ALAluminium2-3-4-5
INOXAISI3041-1,5-2-2,5-3
ACCarbon Steel1-1,5-2-2,5-3-4-5
PVCPVC1-1,5-2-3

The anchoring of the bellows to the machines takes place through the end part of the bellows equipped with rigid flanges in aluminium, stainless steel, carbon steel and PVC.

Flanges

Fixing

Flat protective bellows without laminations
  1. = Flange

Attachment flange fixing systems

–Type A et Type I

  • Solution with connection flange Type A: Flange covered by the fabric of the bellows (without last support)
  • Solution with Type I attachment flange: Painted flange fixed to the last support of the bellows
  • Solution with attachment flange in steel, aluminium or PVC sheet
  • Shape and drilling according to the customer’s drawing
Flat protective bellows without laminations

Attachment flange fixing systems

–Type B1 and Type B2

  • Solution with connection flange Type B1: Flange that protrudes entirely from the shape of the bellows
  • Solution with connection flange Type B2: Flange that protrudes externally with respect to the shape of the bellows
  • Solution with attachment flange in steel, aluminium or PVC sheet
  • Shape and drilling according to the customer’s drawing
Flat protective bellows without laminations

Attachment flange fixing systems

–Type C

  • Solution with Type C attachment flange: Painted flange fixed to the last support of the bellows with threaded holes
  • Solution with steel sheet attachment flange
  • Shape and drilling according to the customer’s design
  • The flange holes are threaded
Flat protective bellows without laminations
  1. = PVC cover stiffener
  2. = Strip of Velcro applied to the machine
  3. = PVC stiffener
  4. = Flange
  5. = Strip of Velcro applied to the machine

Attachment flange fixing systems

–Type E and H

Solution using VELCRO type quick fixing

The task of the attachment flange is carried out by a PVC support to which VELCRO is applied. A Velcro strip is applied directly to the machine.

This solution offers the following advantages:

  • Quick application and removal of the bellows
  • Reduced cost

Recommended for dry work environments

Flat protective bellows without laminations
  1. = PVC stiffener
  2. = Flange
  3. = PVC stiffener
  4. = Flange
  5. = Counterflange

Attachment flange fixing systems

–Type F and G (Entire fold in PVC)

Solution through HIGH TENACITY quick fixing.

The attachment flange is made of sheet steel, aluminium or PVC, with shape and drilling according to the customer’s design.

This solution offers the following advantages:

  • Quick application and removal of the bellows
  • Perfect perimeter sealing by applying mousse.

Recommended for wet work environments

Structures

Structures

Flat protective bellows without laminations

Standard structures for flat thermic-welded bellows

UL-OS = Folding fabric only
UL-2ST = Thermic-welded bellows with two weld seams and pull-out stop inside the bellows
UL-1S = One-sided bellow with PVC supports
UL-3S = One-sided thermic-welded bellows with three welded edges
DL-DXC = Thermic-welded bellows with two welded edges
TL-SIM = Thermic-welded bellows with three welded edges, symmetrical shape
TL-DXC = Thermic-welded bellows with three welded edges, asymmetrical shape
TL-DXI = Thermic-welded bellows with three welded edges, slanted shape
CL-SIM = Thermic-welded bellows with five welded edges, symmetrical shape
QL-QUAD = Thermic-welded bellow, square shape
QL-CAP = Thermic-welded bellow, roof shape
QL-RETT = Thermic-welded bellow, rectangular shape
QL-ASI = Thermic-welded bellows with four welded edge, asymmetrical shape
CL-ASI = Thermic-welded bellows with five welded edge, asymmetrical shape

Documentation