This is imperative to ensure maximum splice life and performance. The process not only requires specific temperature, compression and equipment dwell time but also needs special tools, expertise, and a clean and controlled environment, unlike mechanical splicing process.
The entire process for the vulcanizing of a belt takes several hours, whilst also requiring meticulous preparation before the process. The vulcanization process is not usually preferred if the belt is old, dirty or unevenly worn.
Typically, more durable than a mechanical splice, vulcanization splicing is usually conducted by personnel with an in-depth knowledge of solvents, bonding materials and other cover and fill materials. There are two types of vulcanization and as follow: Hot Vulcanization : In this method, the splices are created using heat and pressure in heated presses.
This splicing method is effective, but time-consuming and is suitable for all types of belts of different thickness and widths. This method of belt fabrication creates strong, long-lasting splices compared to other techniques of belt splicing. Cold Vulcanization: Cold vulcanization is a reliable joining technique wherein chemicals are utilized to splice the rubber ends. The process requires reliable hand tools and high-quality bonding agents. Related Posts.
January 8, August 25, 0. Belt conveyors are one of the important material handling equipment …. Lightweight plied conveyor belt splicing applications. Lightweight plied conveyor belt splicing options. Finger splice Primarily used on thermoplastic belts. Finger over finger If you are having premature popping issues with your fingers on a traditional finger splice, then the finger over finger splice may be your best solution.
Lap over finger This splice is great in troughing applications where your belt is prone to premature finger popping issues as well as situations where buildup problems are present on your pulleys.
Finger on bias Finger on a bias is used on applications that have nose bars present. Skive splice This is a common conceyor belt splice for non-woven and nylon core belts as well as an alternate splice for thermoplastic and rubber belting.
If an unexpected splice is required, it is not necessary to wait for professional assistance. In addition, mechanical splices can be made in restrictive environments with no special regard for space, temperature, moisture or contaminants.
Mechanical splicing also offers reduced belt waste and visibility of splice condition, both of which can significantly reduce costs. Moreover, because a mechanical splice is visible, wear and deterioration is apparent and can be taken care of before a complete belt failure.
Vulcanized splices, in contrast, typically deteriorate from the inside out due to poor adhesion. The first sign of wear comes too late for any preventative measure, resulting in longer downtime. As with vulcanization, there are several types of mechanical fastener, each created for use with different belt widths, lengths, thicknesses, speeds, tensions and belt cleaners. Identifying the correct fastener for the application is essential to ensure maximum splice life and performance.
Mechanical fasteners are available in two types — hinged and solid plate — and with a variety of attachment methods, including rivets, bolts and staples. For extractive applications, rivet-hinged fasteners allow for the greatest versatility. They combine top and bottom fastener plates, which are joined at one end by two wide hinge loops. Each pair of plates sandwiches the belt end and is secured to the belt with a staggered pattern of rivets.
The rivets penetrate the belt without damaging or weakening the belt carcass, because they slip between the load-bearing carcass fibres. The rivets are installed in a staggered pattern to provide maximum resistance to pull-out and to distribute splice tension evenly across the width of the belt.
No matter what the belt condition, mechanical fasteners are a good choice for both new and older, worn belts. Rivet-hinged fasteners can be used on belt thicknesses ranging from 3mm to 25mm with minimum pulley diameters of mm.
Because removing the hinge pin can easily separate hinged fasteners, these designs are essential in mining and quarrying applications where belts must frequently be removed, extended or shortened. In addition, hinged fasteners provide several installation benefits in these applications. For example, the hinged fastening system permits separate halves of the belt to be pre-spliced, requiring only the hinge pin to be inserted at the job site. Also, if belts of different thicknesses must be joined, hinged fasteners can often satisfy this need by allowing two different fastener halves to be joined by a hinge pin acceptable to both.
Moreover, mechanical fasteners can be installed quickly and easily, on-site, by in-house maintenance crews, usually in less than 60min. Mechanical splice installation tools are easily transported to the job site and offer splice installers versatility in installation methods. In manufacturing, production and mining environments, downtime can result in financial losses.
Improper slices can also result in the material being carried by the belt falling through and causing problems and lost profit. A mechanical splice is created by using metal hinges or plates. This method requires a mechanical fastener system and a hammer or electric rivet driver of some sort to install the fasteners.
Mechanical splicing is a versatile solution because it can be done in many different environments and on many types of belts. It is typically used in applications in which belts go through lots of wear and tear or need to be continuously expanded, or on belts in dirty, high-moisture environments or cramped spaces.
These applications include mining, quarry and other heavy-duty applications. This mode of splicing is more involved and requires special tools, expertise, and a clean, temperature- and moisture-controlled environment.
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