![]() Nonetheless, to avoid thick sections that will cause sink, be careful not to place bosses directly in the corner or fill the space between the boss and the wall. It is good practice to connect a boss to the nearest side wall with a rib for better rigidity and material flow. Secondly, with a tall boss, there are implications in terms of the time it takes for the core pin to cool (longer), which eventually affects the dimensions of the cored hole. Firstly, there should be enough material to allow for sufficient thread engagement to prevent stripping. Likewise, a taller boss does not necessarily equate to more strength. As a rule of thumb, the wall thickness of a boss should be 40 to 60 percent of the nominal wall to minimize sinking. While bosses should have thick enough walls to provide holding strength for fasteners, especially threaded ones, the walls must not be so thick as to cause sink marks. Here are some important boss design considerations our Xcentric experts emphasize when helping customers design their plastic parts: Wall Thickness and Heightĭepending on the shrink rate of the material used, the wall thickness and height of a boss is critical to help minimize sink and warpage. Managing shrinkage during the injection molding process is a complicated task. Key Considerations for Plastic Boss Design These uneven dimensional changes can cause other mold flow problems, result in cosmetic flaws and even product failures. Thin sections that are pulled in towards the thick section during the cooling process run the risk of warp. Thick regions of plastic are more prone to sink issues. If the material near the surface cools and shrinks faster than the material near the core, it can cause depressions in the surface and stress inside the part. The polymer may cool at different rates in different sections of a plastic part. ![]() During the injection molding process, the material used and the part design can drive the polymer to behave in varied ways. Plastic shrinkage is undeniably one of the biggest challenges in injection molding. Sink Marks and WarpingĪnother way to understand bosses is to consider this feature as a round rib, and so like ribs, a poorly designed boss can easily cause sink marks or warping due to shrinkage. ![]() Taking these into account can help you prevent defects, lowering the risk of costly part rejects. A second consideration is any type of force that may occur during assembly and service that could impact the part (this includes cosmetic impact). When adding a boss to a molded part, you must first consider its function. The air cooler starts from 13,000/- PKR and depending on the size they may cost you around 20,000/-.Able to withstand tension, compression, torsion, and flexing (if required as part of their end function) ![]() Price of Boss Room Cooler in Pakistan 2023:ĭespite giving so many features, Boss has lived up to its name and has provided its user with very low-cost premium quality air coolers. Large water tank capacity (30 to 60 liters)īesides these features, we would also discuss a few of the pros and cons of a boss air cooler.Different sizes (portable & regular) with a heavy-duty fan motor.Rotatory propeller fan & large honeycomb for cooling.The boss in its cooler offers the following features. The only visible issue of boss air cooler is that its water needs to be replaced regularly to avoid it becoming stale, which can make it unsanitary. Some of their coolers also include auto fin movement, which evenly distributes the air throughout the room, otherwise, it would simply blow it in one direction. Owing a boss water cooler means that you can enjoy your summer without worrying about electric bills.īOSS is in the business of room coolers for a while and being a well-known brand it provides a wide range of sizes in it. It’s a miracle for a country where there’s an energy crisis, and air conditioners required will add tons of money to your electric bill. Boss company being a Pakistani company manufactures air coolers with Pakistan’s consumers in mind.īoss air coolers are an excellent example of low-power cooling technology. Boss fulfills those demands by providing cost-effective air coolers. Air coolers are in high demand, especially on dry hot days.
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