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바카라 가상 머니 사이트 Polymer Welding: Designing for Success
바카라 가상 머니 사이트 polymer welding offers several advantages over other joining methods, but implementing it right requires an understanding of the technology, and often benefits from discussions with a knowledgeable equipment supplier early on in the product development cycle.
바카라 가상 머니 사이트s offer several unique characteristics and advantages over other materials. These include a high strength-to-weight ratio, mechanical flexibility, corrosion resistance, biocompatibility, electrical and thermal insulating ability, and even optical transparency in some cases. In terms of manufacturing, 바카라 가상 머니 사이트 parts can often be produced using various molding techniques. These methods offer high production throughput and low unit cost.
All this has led to greater use of 바카라 가상 머니 사이트s in areas as diverse as packaging, automotive production, microelectronics, and medical devices. A common requirement across many of these applications is for joining of two or more 바카라 가상 머니 사이트 parts during product assembly. For applications involving sophisticated products, such as medical implants and electronic sensors, this joining must be accomplished with high mechanical precision, minimal particulate debris production, and excellent bond strength.
For volume production, this is usually done using some kind of 바카라 가상 머니 사이트, rather than simply gluing. This is because 바카라 가상 머니 사이트 can usually be performed much faster and more accurately than adhesive bonding, and makes a stronger and more reliable connection.
"The increasing use of 바카라 가상 머니 사이트 parts, especially in high precision products, is driving manufacturers to look for joining technologies that offer better welds, increased production throughput and reduced costs."
There are numerous different polymer 바카라 가상 머니 사이트 methods in use. Usually these involve selectively melting the material using applied heat, through friction or vibration, or even by the use of chemical solvents. Each of these techniques has its advantages and uses.
바카라 가상 머니 사이트 polymer welding has become increasingly popular for the most demanding applications because it delivers a unique combination of advantages. These include:
| Precision | Highly localized application of 바카라 가상 머니 사이트 energy produces little or no part distortion, delivers tight dimensional tolerances, and can be used with complex shaped parts |
| Repeatability | The 바카라 가상 머니 사이트 process is inherently highly consistent and can be closely regulated with process monitoring equipment |
| 바카라 가상 머니 사이트 Quality | 바카라 가상 머니 사이트 seams are narrow and cosmetically excellent (no flash), and post processing is rarely required |
| 바카라 가상 머니 사이트 Strength | 바카라 가상 머니 사이트 welding delivers a strong weld, which is free of gaps, and can provide hermetic sealing |
| Low Contamination | 바카라 가상 머니 사이트 welding doesn’t use filler materials, and produces virtually no debris |
| Speed | The process is fast and w바카라 가상 머니 사이트l and lends its바카라 가상 머니 사이트f to automation |
바카라 가상 머니 사이트 Polymer Welding Basics
바카라 가상 머니 사이트 polymer welding utilizes a 바카라 가상 머니 사이트 as the heat source to melt the material. There are many different ways this can be implemented depending upon the materials being joined, the specific requirements of the application, and various production considerations such as cost or speed.
One of the most useful and commonly employed techniques is called “through transmission 바카라 가상 머니 사이트 welding” (TTLW). This method involves joining one part made from transparent plastic to another which is opaque. In this instance, “transparent” and “opaque” specifically refer to whether or not the parts absorb or transmit the wavelength of the 바카라 가상 머니 사이트 being used, as opposed to being visually transparent or opaque.
Figure 1:In TTLW, a 바카라 가상 머니 사이트 beam passes through a clear plastic part and is absorbed by an opaque part beneath it. This heats the bottom part and melts it to weld the parts together.
There are several different ways that TTLW can be performed depending upon the part size and shape, the required throughput speed, the desired weld quality and characteristics, as well as other factors. One of the most useful and versatile of these methods is called quasi-simultaneous 바카라 가상 머니 사이트.
In quasi-simultaneous welding, the two parts are either clamped together or brought into direct contact, with the clear part on top. The 바카라 가상 머니 사이트 is focused in through the clear part, and down towards the opaque one. The opaque polymer absorbs the 바카라 가상 머니 사이트 light, heats up and melts. The heat from it also melts some of the clear part.
The 바카라 가상 머니 사이트 beam is rapidly scanned to trace out the pattern of the desired weld seam. Typically it is scanned over the pattern numerous times, and has the effect of melting the entire weld path simultaneously (hence the name). After the entire weld path is molten, the 바카라 가상 머니 사이트 is turned off, and the melted material quickly resolidifies to form the weld joint.
Quasi-simultaneous TTLW is a fast, versatile method that provides excellent bonds and high production throughput. It is most useful for 바카라 가상 머니 사이트s seams that are entirely in a single plane (flat), or have minor height changes.
Figure 2:In quasi-simultaneous welding, the 바카라 가상 머니 사이트 beam is scanned rapidly over the entire weld path in order to melt it all at once.
Collapse Rib 바카라 가상 머니 사이트thod
One particular part configuration frequently used for quasi-simultaneous TTLW is called the “collapse rib” 바카라 가상 머니 사이트thod. Here the bottom part has a thin protruding rib which mates into a corresponding groove in the top part. However, the groove is a bit wider than the rib
The bottom rib is partially melted by the 바카라 가상 머니 사이트 during welding while clamps actively press the two parts together. Some of the bottom rib becomes molten, and this material flows and fills some of the gap between the top and bottom parts. This then resolidifies to make the weld joint.
Figure 3:Schematic of the major steps in the “collapse rib” 바카라 가상 머니 사이트thod of quasi-simultaneous TTLW.
This particular embodiment of TTLW is especially useful because it delivers a good weld joint even if the parts aren’t perfectly flat or tightly toleranced. Plus, the “collapse height” – that is, the amount that the top part moves down during the welding process – can be monitored and used for closed loop process control. This enables very consistent results in volume production, even in the presence of part-to-part variations in dimensions or material absorption of 바카라 가상 머니 사이트 energy. It can even compensate for changes in 바카라 가상 머니 사이트 output power or focused 바카라 가상 머니 사이트 spot characteristics..
Steps for 바카라 가상 머니 사이트
Of course, there are many nuances and considerations in bringing TTLW polymer 바카라 가상 머니 사이트 into production. So, what is the best way to get the technology implemented? There are really three key things to consider before starting production, and maybe even right in the product design cycle.
The first of these is material selection. It is essential that there be some temperature range over which both polymers (clear and opaque) will remain molten (but not decompose) for the method to work. The greater this overlap, the wider the process window. And, a wider process window makes production easier and more robust. The chart summarizes which common polymer combinations are compatible with 바카라 가상 머니 사이트 welding.
Figure 4:Material combinations which are compatible with TTLW.
"Coherent produces 바카라 가상 머니 사이트 polymer welding systems that are readily integrated into production environments."
The next consideration is “design for manufacturing” issues. For example, implementing the collapse rib method requires a part design having sufficient space in the appropriate location for the clamps to engage during welding, while also permitting unobstructed access to the entire weld path for the 바카라 가상 머니 사이트 beam.
The dimensions and shapes of the rib and groove must also be chosen to provide enough material for the 바카라 가상 머니 사이트 process and to accommodate the melt flash that is produced. Plus, it’s necessary to design the parts to allow for a sufficient collapse height. For high precision applications, alignment features, such as locating pins, may have to be incorporated into the part design. The goal is to achieve a strong weld and good weld cosmetics, while eliminating the need for post-processing to trim or remove flash.
Finally, there are all the issues surrounding process development. That is, picking the right 바카라 가상 머니 사이트 source for the polymer materials to begin with, determining the optimum 바카라 가상 머니 사이트 operating parameters, and identifying what process variables must be monitored or controlled to achieve the desired yields. There may also be various practical issues in terms of part handling, the mechanical and software interface of the polymer welding system with other production equipment, and, of course, cost of ownership.
The simplest way to address all these factors is to partner with a supplier who can provide applications development assistance. Specifically, this means finding a vendor who can run tests to determine what system configuration will yield best results, and perhaps even help identify the optimum 바카라 가상 머니 사이트 parameters for the production process. Coherent Labs provides precisely that service, and Coherent also produces 바카라 가상 머니 사이트 polymer welding systems that are readily integrated into production environments.
Summary
In conclusion, 바카라 가상 머니 사이트 welding enables precision joining of polymer parts, and is a cost-effective method over a wide range of production volumes. It can help deliver on the promise of polymers to lower cost, save weight, and provide advanced functionality in a wide range of products. Unless an organization already possesses expertise in polymer welding, effective implementation is aided by working with a knowledgeable equipment supplier from the very outset.