Plastic Extrusion Pvc Pipe Machine With Price Pakistan

Plastic Extrusion Pvc Pipe Machine With Price Pakistan

Extrusion Basics: To Twin Or Not To Twin?


My usual hello: There are no toxic plastics. Worldwide concern is due to our appearance as corporate, humanipulated (not natural or predictable) and science-based (chemical) and, thus, denying magic and miracles, which we need. Our critics are not stupid nor uneducated—they are scared. Questions or comments? Please call or write. Now, to extrusion. I have lived with the dilemma of being an only child (typical in the depression years) and being a Gemini (the twins). I’ve had a lot of duality in my life: Two educations, two spouses and residence on two coasts. The symmetry is not perfect—somehow I had three children and three important dogs to teach me honesty and fidelity (Did you ever see a sneaky dog?). So, the difference between single-screw and twin-screw extrusion is an attractive topic, and is sometimes misunderstood. First of all, there are many “breeds” of each. It isn’t only twin or single, as extruders also differ in diameter, length, speed range, power limits and screw design. If you’re buying an extruder, you should know what you want first, based on the product you want to make and the expected production rate in pounds or kilograms per hour, or sometimes feet or meters per minute (which can convert to weight/hour, if dimensions and materials are known). If I am asked, “What do I need to make x product?", I reply with, “How much do you want to make?” In many cases, the specification of the die and downstream equipment is at least as important as the extruder itself. If I’m asked, “Who makes the best extruders?”, I see someone who trusts brand over all, and may be denying his own responsibility for knowing what he needs. Some suppliers may, indeed, be helpful, but you have to invest some time to find the best match. Most extruders are single-screw—about 90% is my best estimate. But that is misleading, because the twins are concentrated in two market areas—rigid PVC and compounding—and the twins for one application are very different from the other. The PVC lines have one-piece screws, which intermesh in a figure-eight barrel. They are positive-conveying devices, which means their volumetric output is closely controlled and less dependent on what is happening in the barrel. In fact, they are usually run with the option of varying the portion of the screw that is filled with melt, which is done by keeping the feed rate constant and changing the actual screw speed. A longer full section will give more mixing but also add more heat (more motor energy needed to turn in more resistance). Most PVC twins have parallel screws today, but conicals were developed in the 1970s to solve the thrust bearing problem. In a conical, the shafts diverge in the back, allowing larger bearings to take more head pressure (thrust backward). There are a few old conical machines still in service, and more are being made today for small- to middle-output lines, where the bearing problem still makes them preferable. Most twins are powder-fed, which is easy for their positive-feed ability, and relates to the overall economics of such extrusion: The twins are more expensive at similar output and quality, but save money because powder blends are cheaper than pre-pelletized compounds. Also, they have one less heat history, which means less stabilizer and, thus, even better economics. Do the math, and deal with machine cost responsibly—payback in x years, depreciation, 24-hour operation (if you don’t run 24, your competitors will). There are special cases with internal sales or very specialized products (space, medical), but that’s a small segment of our industry. Even if you have decided that you want a twin, you still have to decide among new U.S./European, new Asian or used from anywhere. Used machines save money and often time, but require advance inspection and a good maintenance team who will be needed for installation and more frequent follow-up. My rule of thirds: A used machine should cost about 1/3 of a new machine at equal productivity and quality; expect to pay another third to get it running right; and the third third is the money gain. The other family of twins are the compounding lines, which can run any material and are often used in resin-makers’ finishing lines to make pellets. They are typically very long and have segmented barrels, and the screws are similarly sectioned to match the barrel, so you can alternate sections of mixing and conveying, venting and adding of filler or other components. They usually run very fast compared with the PVC twins, where flights intermesh deeply and clean each other out. With the compounding family, the intermeshing is less, and they generate a lot of heat and need intense cooling to get that heat out. The design of the components is well known by now, but the real skill is knowing how to configure the screws—i.E., which components go where?  Co- or counter-rotating? Two intermeshing screws can go either way, and one machine was actually built that can do both (with different screw pairs, of course). A detailed comparison is too much for here, but I can say that most of the powder-fed rigid PVC lines today are counter (screws rotating in opposing directions) and most of the compounders are co-rotating (same direction). The twin-makers still have their major markets, but for years now they have been nibbling at the single-screw market with “direct extrusion,” where the extruder both compounds/mixes and pushes the melt out into a finished pipe, sheet, etc. Until recently, most direct extrusion lines were segmented parallel compounders, but at least one maker now offers a conical twin for direct extrusion of something other than PVC (in this case, PET).  A single can do a good mixing job, too, but the twins claim better mixing capability and possible material saving because twins generally mix with less energy input (hence less stabilizer). There are singles out there doing the job of twins (maybe adding static mixer and/or mixing heads) as well as twins doing the usual job of singles. If you have a machine and know how to run it, it may make sense to stay with what you know.  Triplets or more? There have been three-screw extruders developed (including conical) and even a four-screw many years ago, but the most important commercial variant has been the planetary, with a large central screw and many smaller ones running around the big one.  Allan Griff is a veteran extrusion engineer, starting out in tech service for a major resin supplier, and working on his own now for many years as a consultant, expert witness in law cases and especially as an educator via webinars and seminars, both public and in-house. He wrote the first practical extrusion book back in the 1960s as well as the Plastics Extrusion Operating Manual, updated almost every year, and available in Spanish and French as well as English. Find out more on his website, www.Griffex.Com, or e-mail him at algriff@griffex.Com. Griff will present a live seminar in Chicago on Nov. 8. Seminars in your plant are also available. If you can’t attend his live events, he offers a Virtual Seminar, which can be seen at anytime, anywhere. E-mail Griff at the address listed above for more information. PLASTEC Minneapolis 2018 held October 31-November 1 is part of the Midwest’s largest advanced design and manufacturing event, bringing you the latest in materials and additives, injection molding, rapid prototyping, coatings, automation, packaging and more. For details, visit PLASTEC Minneapolis.


Extrusion Basics: Why It’s Important To Know How Fast Your Screw Can Turn


Top screw speed is the top motor speed divided by the reduction ratio, which is determined by the gear box and (sometimes) pulley sets. In most extruders it is somewhere around 100 rpm.       One exception to this is the twin-screw extruder used for rigid PVC pipe and profiles, and lately for PET sheet and other resins, as well. These screws run more slowly—30 rpm is high! They cost more than singles per unit output at equivalent quality, but this cost is justified as they allow powder feed and generate less heat for equivalent mixing. This saves material cost, as PVC powder blends are cheaper than pellets, and the lower process temperatures as well as the saving of a heat history mean less stabilizer is needed. Another exception in the opposite direction: Twin-screw extruders, especially big ones, used for compounding. These are usually segmented, with many components arranged along a keyed shaft. The major makers have promoted their products by increasing torque capacity as well as screw speed, and the extruders are fitted with intense water cooling to deal with the overheating. Although it may sound good to be able to run at 1000 rpm and up, the real measure of value is the cost-per-unit-output  of non-degraded salable material, including delivery, installation and training. Single-screw extruders have been built to run very fast, too—I remember HPM showing a machine around 30 years ago that could run at 400 rpm, or was it 800? Makes no difference, as this type of machine has pretty well standardized at around 100 rpm tops, and most lines don’t even push it that far. In Europe there are a few lines running well above that, especially for in-line thermoforming, and the claim is made that they save power and space. The power savings may be more important there, but I’d want to see the differential in euros before I can go along with this reasoning.  Other exceptions back on the slower side include very small lines, where high speed would result in an insufficient residence time to get acceptable mixing and a thermally uniform melt. Also, very large diameter single-screw lines don’t always run fast, either, as increased circumferential speed in the channels (which varies with diameter squared) will increase frictional heat generation and thus risk overheating.  So how fast can your screw turn? The simplest way is to run the speed control up to the max and count rpm. I say “count,” because I don’t trust displays until I’ve had experience with them (somewhat like people). However, it isn’t a good idea to run empty for a long time, and running it full may waste material and time. If you can do this just before a scheduled shutdown, you’ll minimize the waste.  Look at the motor nameplate (see photo). If it’s a DC motor, you will see maximum voltage. It may not say “max,” but it’s usually 500 V for middle-large lines, maybe less for smaller ones. You now can tell the voltage actually used, as it is in proportion to the speed. For example, if actual screw speed is 60 rpm and max is 120, then the voltage is 250 V, and the available power (volts x amps) is half what it is at max voltage. That protects the system against excess torque, which can twist or break shafts—that happens when too much power is delivered at low speeds.  With the AC motors that have been preferred for the last 20 to 25 years, the principles are the same but the calculations aren’t as simple. There are several different types, so talk with the motor maker, if needed, to learn how to calculate torque and actual power in use. If you look at the max screw speed on the nameplate, you’ll see a number usually around 1750 rpm. That’s the max motor speed, so divide that by the max screw speed and you have the reduction ratio. If you see two numbers—1750/2100, for example—it’s a field-weakening DC motor, which may be able to get higher screw speeds but no more than rated power; that is useful if you are already at top speed but not drawing full power. And if you are running close to or at max amps (also visible on the motor nameplate) you may want to reduce top speed with pulleys or some other means, so that top speed is less but more power is available at any one speed. One final word on screw speed, which echoes the worries about running too fast that I’ve expressed in this column before. Before blindly thinking that faster is better, remember that faster may be worse if you don’t sell the increased production. Warehousing the unsold production has a price, and speed may reduce thickness control and may risk mechanical problems. That’s why optimum, rather than maximum, is desirable: Optimum takes into account other aspects (sales, thickness control, overheating and so forth), whereas maximum is just a mathematical concept and doesn’t consider such factors. Allan Griff is a veteran extrusion engineer, starting out in tech service for a major resin supplier, and working on his own now for many years, as a consultant, expert witness in law cases, and especially as an educator via webinars and seminars, both public and in-house. He wrote the first practical extrusion book back in the 1960s as well as the Plastics Extrusion Operating Manual, updated almost every year, and available in Spanish and French as well as English. Find out more on his website, www.Griffex.Com, or e-mail him at algriff@griffex.Com. In the fall, Griff will present his one-day practical seminar, "Introduction to Extrusion," in Chicago, Los Angeles and Houston. Topics include the ten (11) key principles of extrusion, plastics chemistry for non-chemists, a review of extrusion hardware, the limits to production rate, quality control of raw materials, simplified rheology, start-up and shut-down procedures and troubleshooting common extrusion problems. E-mail him at the address listed above for more information.


80/20 Extrusion Goes Main Stream


We had to do a double take when we saw this kickstarter campaign video – and we bet you will too. It seem as if some company called [Infento Rides] took generic 80/20 aluminum extrusions and built a viable commercial product out of it – that’s not something you see everyday. 80/20 is meant to be something that engineers use to build things like test rigs and manufacturing fixtures. It’s not exactly an item designed for the consumer or end user. But we think the DIY/teaching aspect of this idea really has legs wheels. If you’re looking for [Santa] to put this under the tree this Christmas, you might be disappointed as it’s not exactly on store shelves just yet since the kickstarter campaign just ended – but we wish them well, and hope they come through. If you’re old enough you may remember Erector Sets (they were mechanical equivalent of the 200-in-1 electronics kits) back in the day. Well, this type of product brings back memories of both. It’s a perfect tool for getting kids interested in making – sure, they aren’t “making” much, but we all start somewhere. The one thing we would like to see is a more open-source type kit like the Chibikart. That and something a little less then the $300-$500 price range.  But can you really put a price on teaching a child to build something, and starting that fire inside of them?  Maybe not.




Product Description about PVC pipe extrusion machine(PVC pipe machine)
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan

Plastic Extrusion Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan

PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
PVC pipe machine, Pvc Pipe Machine With Price, Pvc Pipe Machine With Price Pakistan
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
This is a brief introduction about one of our strength product PVC pipe extrusion machine(PVC pipe machine) which used making high quality PVC pipe .The chart below showed you the diameter and other parameters which you would want to know about the final products.You can contact us for help if there is any questions. The parameter of this machine might not as same as the real machine. We have a bigger range of PVC PE Pipe machine to make different type pipe or tube. You can find our contacts at the bottom of this page,just click and you can reach us directly!

Plastic Extrusion Pvc Pipe Machine With Price Pakistan
Pvc Pipe Machine With Price, Pvc Pipe Machine, Pvc Pipe Machine With Price Pakistan, 

Plastic Extrusion Pvc Pipe Machine With Price Pakistan
Pvc Pipe Machine With Price, Pvc Pipe Machine, Pvc Pipe Machine With Price Pakistan, 



This Youtobe channel is not only used for posting some video about PVC pipe making machine ,It also about other machine which manufactured by our company(PMT-The revolutionaries and leader in the plastic machinery tech).We also supply the production line which used for making synthetic resin tile,window profile and many kinds of boards.PVC pipe making machine is just a small part of our company. You can customize many part of the plastic extrusion machine.
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
Pvc Pipe Machine With Price, Pvc Pipe Machine, Pvc Pipe Machine With Price Pakistan, 


Model DMJ-140 DMJ-150 DMJ-170 DMJ-190
Motor power
119
132 160 180 250
r/min 3-60 3-60 3-60 3-60 3-60
Forced feeding(kw)
7.5 7.5 11 11
PVC soft film extude volm(kg/h)Max
900 1000 1200 2400
Detailed Images
Plastic Extrusion Pvc Pipe Machine With Price Pakistan
Pvc Pipe Machine With Price, Pvc Pipe Machine, Pvc Pipe Machine With Price Pakistan, 


There is some details of our production line (PVC pipe extrusion machine) which used for making PVC pipe.
  

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