PART OF THE
ANROBER BELT - TECHNICAL INFO
GRZK with single sides
GRZK with double sides
GRZK Enrober belts are made out of round wires all shaped in the same way and braided together. The above drawings show the construction of a wire mesh belt for straight conveyors. Finished on the sides with a single (most common) or double edge.
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The coarseness or fineness of the belt is primarily determined by the pitch (P) and the thickness of the wire (D). The strength of the belt is determined by the wire thickness (D) and the mesh width (E,F). The edge (G) is determined by the wire thickness. The width of the belt (B) is by request.
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The number of meshes or compartments is always odd and is determined by the width of the belt and the desired firmness. This mesh width is linked to minimum and maximum sizes (see table). In practice, this size will vary somewhere between 40 and 90 mm.
The table below shows the preferred pitch sizes (P) with possible wire diameters (D1..5) and average belt weights (M1..5) associated with the relevant wire diameters (D). The bold / italicized diameters are preferred at the indicated pitch. Intermediate pitch sizes are also available on request.
Based on the wire diameters, the table below gives the dimensions for the corresponding edge (G), minimum and maximum compartment size (E,F), minimum and maximum double side (H) and the minimum and maximum band width (B).
Note 1: The above list gives maximum bandwidths. If the production process and the installation allow it, it is recommended to divide the belt into 2 narrower belts for widths greater than 2 meters. This is to make the assembly and possible repair easier.
Note 2: The sizes E and F are often the same. It is also possible to make this mesh width (or box width) differ or even to give a certain pattern, for example, large and small widths.
Note 3: The belt thickness is approximately 2.5 x the wire thickness.
Because GRZK Enrober Belts belts are mainly used for the transport of relatively small and light products, the choice of belt pitch, and thus the coarseness or. fineness of the belt, usually product and process determined.
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For an impression of the load capacity of a enrober belt , the table below, based on the pitch size (P) and associated wire diameter (D1…5), gives a number of guideline values regarding the permissible product load, the permissible tensile force per mesh (Fm1..5) and permissible speeds (V1..5). The given values give more or less an average of what is possible. The product itself, the amount of supports, the type of belt load and the process also influence the life of a belt.
The Pitch (P) is very important. Precise belt manufacturing ensures that the wires of the enrober belt fall precisely into the pits of the machined drive wheels.
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Accurate measurement of this size is important with replacement belts. As a rule, this is done by measuring lengthwise over 10 pitches (gaps). The measured size, from the center of thread 1 to the center of thread 11, then only needs to be divided by 10 to get the pitch size. The most accurate result is obtained by measuring just next to the knots and tightening the band slightly (but not too much, otherwise distortion will occur).
Materials
GRZK Enrober belts are made of high quality, high tensile strength wire in the following materials:
- Stainless steel Aisi 302, Active substance 1.4310 (corrosion resistant, normal purposes, food industry)
- Stainless steel Aisi 316, Active ingredient 1.4401 (extra corrosion resistance, in special cases where aggressive chemicals, lactic acids or product acids are involved) - Stainless steel Aisi 316 Ti, Material 1.4571 (see above at stainless steel Aisi 316) -Spring steel (extra high tensile strength, non-corrosive)
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Type of indication:
1) Example for a belt with a pitch (P) of 6.4 mm,
a wire thickness (D) of 1.4 mm, 9 equal meshes or boxes (E,F) of 64.98 mm,
single sides and a total width of 600 mm:
GR-EZK 6.4-1.4 / 9×64.98
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2) Example for a belt with a pitch (P) of 7.26 mm,
a wire thickness (D) of 1.6 mm, 5 equal meshes (E,F) of 90.7 mm,
double sides with H=15 mm and a total width of 500 mm:
GR-DZK 7.26-1.6 / 5×90.7
