The jacquard heald at a glance
Wire surface, materials used and reproducibility of the heald are important parameters when comparing monofilament jacquard healds with glued inset mail eye and twin-wire healds with welded inset mail eye. To give you some insight, we have individually highlighted each of these points below.
The images have been generated with macro-optics and a scanning electron microscope (SEM).
Made of stainless steel
The monofilament jacquard heald from Groz-Beckert is made of top quality stainless steel. It has a significantly better finish quality than traditional C steel (carbon steel). The monofilament heald is also more corrosion- and acid-resistant, which is advantageous when it comes to treating chemically-treated warp yarns.
The goal of product development was to produce a heald with long service life and significantly reduced abrasion as compared to twin-wire healds. This has resulted in significantly increased productivity and fabric quality.
The high process capability of Groz-Beckert products guarantees consistent product and fabric quality. The use of a monofilament in jacquard healds leads to particularly gentle treatment of yarns in all areas, especially in the transitions around thread eyes.
The following image comparison points up the optimized shape of monofilament healds as compared to traditional twin-wire healds.
Thread eye monofilament
Thread eye twin-wire
The innovative thread eye of monofilament jacquard healds is no longer soldered, but glued. The glue is not immediately near the thread eye but rather around the edges in order to secure the inset mail eye, resulting in a uniform surface that is gentle on yarns, as shown in the comparison below.
Image of glued inset mail
Image of soldered inset mail
On the solder type used to manufacture twin-wire healds, the entire inset mail eye is covered with a very fine solder layer. The use of soldering tin can form scattered soldering beads which can damage the yarn.
Close-up of glued inset mail
Close-up of soldered inset mail
In the manufacture of twin-wire jacquard healds, individual components are connected with soldering tin. Soldering tin is a relatively soft material and using it near the thread eyes can lead to surface cuts from the mechanical stress of the warp thread.
Examples of wear on soldered healds from abrasive behavior of warp threads near the thread eye
Another challenge posed by the use of soldering tin is the adherence required of the material near the thread eye, as well as the soldered twin-wires. Here it can come to flaking on the solder layer.
Insufficient material adherence and cut-outs on the surface of the inset mail eye can lead not only to fabric damage, but also to contamination of end products.
Flaking near thread eye
Flaking of twin-wire
All from a single source
From idea to product – the new jacquard monofilament heald is produced entirely by Groz-Beckert. The materials used meet the highest standards and are in optimum alignment with one another so you can benefit from maximum utilization.
For custom compositions of wire and inset mail eye, Groz-Beckert provides the right solution for all needs. The product range includes wire diameters of Ø 0.50 mm for denser rows and Ø 0.65 mm for higher warp tension.
Inset mail eye models:
- SR312 currently available
- SR518 available in 2017
In addition to our standard types, we would appreciate to verify your requests for special executions.
ALtop Hybrid+ High-performance heald frame from Groz Beckert features maximum machine speeds and is accelerated to 357 m/s². A Formula 1 car moving at the same rate would reach a speed of 200 km/h in 0.16 seconds.