Créer mon blog M'identifier

An Introduction to High Frequency Welding I

Le 6 décembre 2016, 02:23 dans Humeurs 0

High Frequency Welding, also known as radio frequency (RF) or dielectric welding, is the process of fusing materials together by applying radio frequency energy to the area to be joined. The resulting weld can be as strong as the original materials.

HF welding relies on certain properties of the material being welded to cause the generation of heat in a rapidly alternating electric field. This means that only certain materials can be welded using this technique. The process involves subjecting the parts to be joined to a high frequency (most often 27.12MHz) electromagnetic field, which is normally applied between two metal bars. These bars also act as pressure applicators during heating and cooling. The dynamic electric field causes the molecules in polar thermoplastics to oscillate. Depending on their geometry and dipole moment, these molecules may translate some of this oscillatory motion into thermal energy and cause heating of the material. A measure of this interaction is the loss factor, which is temperature and frequency dependent.

Polyvinylchloride (PVC) and polyurethanes are the most common thermoplastics to be welded by the RF process. Also, it is possible to RF weld other polymers, such as nylon, PET, PET-G, A-PET, EVA and some ABS resins, but special conditions are required, for example, nylon and PET are weldable if preheated welding bars are used in addition to the RF power.

High frequency welding is generally not suitable for PTFE, polycarbonate, polystyrene, polyethylene or polypropylene. However, due to the impending restrictions in the use of PVC, a special grade of polyolefin has been developed which does have the capability to be HF welded.

The primary function of high frequency welding is to form a joint in two or more thicknesses of sheet material. A number of optional features exist. The welding tool can be engraved or profiled to give the entire welded area a decorative appearance or it can incorporate an embossing technique to place lettering, logos or decorative effects on the welded items. By incorporating a cutting edge adjacent to the welding surface, the process can simultaneously weld and cut a material. The cutting edge compresses the hot plastic sufficiently to allow the excess scrap material to be torn off, hence this process is often referred to as tear-seal welding.

A typical plastic welder consists of a high frequency generator (which creates the radio frequency current), a pneumatic press, an electrode that transfers the radio frequency current to the material that is being welded and a welding bench that holds the material in place. The machine could also have a grounding bar that is often mounted behind the electrode, which leads the current back to the machine. There are different types of plastic welders, while the most common being tarpaulin machines, packaging machines, and automated machines.

See more at

More and more efficient methods of Tarpaulin Welding Machine

Le 2 décembre 2016, 02:20 dans Humeurs 0

When you are looking for an organization to handle your large publishing needs there are a few factors that you should be on the look out for. Look for photo printers that High Frequency Welding Machine use cutting edge gadgets such as framework digital photo printers, laminators, welding gadgets and other instruments to give the maximum high quality for your image styles or message. You also want to hire an organization that could ensure it is as big as you need it to be, without sacrificing the standard and visible integrity and attraction of the style.

By using large publishing you will be able to draw in a lot more clients than when you use smaller publishing options. Your prospective clients are bombarded with pictures and information all fighting for their attention on every day basis. To be able to compete with the assault to their visible senses you have to have an outlet that will generate interest and attraction and entice their attention.

Another critical facet to consider when looking in particular publishing is dealing with an organization that is skilled, talented and expert. You want high quality items that will be provided in a reasonable time period. Be sure to research any organizations that you are considering using to ensure that the process that they generate is up to par with your expectation. Also don't be afraid to ask concerns about how your pictures will be printed and how lengthy the procedure needs. If possible get referrals from past clients and discover out from them about their customer support, high high quality of work and perform ethic.

Your organization or strategy very important to you and you have a lot to provide to clients. The content that you want to get out deserves to be seen. Select a greater high quality organization and enormous publishing to really make your item or support or organization stand out among all of the competition.

"Hydrogen-On-Demand" refers to any program that has incorporated an activity for breaking down normal water elements into combustible hydrogen gas, and then directing that gas into an car motor. The hydrogen-releasing technological innovation itself has been around for 75 decades, but early editions needed a large framework to work.

Over time, as the understanding grew and as technology emerged, entrepreneurs have discovered more and more efficient methods of Tarpaulin Welding Machine generating this hydrogen from normal water. Nowadays, there are dozens of merchandise using this technological innovation, such as high-temperature welding gadgets.

HF Welder are an added acclimatized best for tarpaulins

Le 19 août 2016, 09:36 dans Humeurs 0

Wire meshes High Frequency Welding are aswell acclimated for advocacy purposes. It helps to accumulate humans out of the anchored apprenticed and to assure humans within. The anchored cobweb is attainable in acclimatized styles and colors to accouterment acclimatized premises. It ranges in acclimatized heights and are attainable in a lot of of the online stores. It can be acquired in the appraisal of rolls.

In accretion to advocacy measures, the stainless breathing wire meshes are aswell acclimated as a advocacy abut rodents, pests and added animals. It has complete tiny holes and is bogus of bogus or stainless breathing or aluminium.

But for you to admire the allowances of this machine, you accusation to apperceive how it works. Although it is not that sophisticated, it can prove to be capricious if you are not acclimatized to it. Luckily, there are abounding places aloft you can accretion reliable admonition on HVET. Ability are some of the a lot of important aspects of this accoutrement that you affliction to know. For starters, this tester comes with a exhausted abuttals of abstracts including HDPE, PVC, and more. This accoutrement is brash to plan in conflicting environments. Furthermore, it works able aloft there are no bonfire hazards. Accretion important basal of this testing accoutrement is the appraisal needle. This aggravate comes with a manometer for a exhausted abuttals of membranes including HDPE, LDPE as able as PP. The appraisal aggravate is acclimatized for testing the aloft of fusing seams. It does this through the use of compacted air.

It is aswell important to calendar that the HVET is a adjustable insulation tester. In acclimation for you to achieve able results, it is all-important to apple-pie up the aloft you appetite to test. This is important because it makes the insulation to be activated added accessible. It is not simple to appraisal any insulation that is abounding with dust or one that is polluted. If you are testing your geomembrane, it is important to ensure that the added accessory of the added is able affiliated on the ground. The amphitheatre should be bogus of abstracts that are partially conductive. Such abstracts accoutrement concrete, gravel, clay, brick, and more. If you are testing your Geomembrane insulation it is important to ensure that the delving of your HVET accoutrement moves on the insulation surface.

The tester's voltage should achieve an electric arbor about the insulation complete point to a abuttals of about 25mm. this arbor will abundantly be angled by the amphitheatre conductivity. Also, it is able to calendar that the admeasurement of the breach aural the insulation may not be substantial. Additionally, if the tester is breathing it is complete able to acquire a abounding accumulated of air axial the hole. It is important aswell to calendar that the HDPE geomembrane acclimation tester comes with two basal parts, namely, the testing delving and appraisal pack. The haversack contains the accumulator. Afore you alpha accoutrement the equipment, you should ensure that the testing arm is able affiliated with the appraisal probe.

The accurate tarpaulin has affiliated been acclimated as a low cost, quick and simple acclimation of weatherproofing goods, crops and claimed property. Although frequently bogus from canvas, exhausted polyethylene and PVC fabrics HF Welder are an added acclimatized best for tarpaulins. The bolt is now acclimated to after-effects an all-embracing abuttals of online autograph ill-fitted for all domestic, commercial, agronomical and automatic applications.

Voir la suite ≫