Nov
Arm Machine
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Arm Machine
Rotomoulding Machines - A brief Overview
Rotomoulding is a moulding process for creating many kinds of hollow items, usually out of plastic. It is often done at high-temperature, in a low-pressure plastic using heat and biaxial rotation to produce hollow in the required shape and specification.
Rotational moulding initiated a new age of thinking in the plastic industry, inspiring designs that would have been impossible with conventional manufacturing methods. Apart from the design advantage, the materials used in the production process are eco-friendly and 100% recyclable.
There are many advantages associated with rotational moulding. First and foremost, the moulds are relatively cheap and simple primarily because of the low pressure process and can also be used for complicated requirement as well.
There are several types of rotomoulding machine available in the market. Below is a brief description.
Rock and roll machine
It is a specialized single arm machine. It functions by rotating the mould by 360 degrees in one direction and tipping it around 45 degrees above or below horizontal in the other direction. Such types of machines save the heating costs because of their smaller heating chambers.
Vertical rotational machine
Vertical rotational molding machines have a compact heating and cooling chamber which makes them energy efficient. Even though these machines have a similar capability, like those of horizontal carousel multi-arm machines, they take up a lesser space.
Swing arm machine
This one moves the mould back and forth between the heating and cooling chambers and is a single arm machine. This is a cost effective option mostly used by schools or in prototyping.
Carousel machine
These are the most common rotomoulding machines used within the industry. It is known to have up to 6 arms and comes in a wide range of sizes for multiple heating and thickness requirements.
Critics argue that rotomoulding machine's long cycle time (which is usually only one or two cycles an hour) is a high disadvantage, whereas other moulding machines like injection moulding machines can mould an object in a matter of seconds.
The one who advocates the use of rotomoulding machine say that process does have distinct advantages specially in instances which require manufacturing large hollow parts such as oil tanks etc.
As the industrial sector is growing by leaps and bounds the demand for rotomoulding machines is growing at a rapid pace. The rotomoulding machine suppliers are delighted with the current boom and are anticipating higher profits by the year end.
PS : If you are a rotomoulding machine supplier, get your online catalog today and make profits by tapping the business queries being generated across the globe on the web 24/7.
About the Author
I am a B2B Industry analyst working for a B2B Portal
I am interested in learning about finishing quilts. What is the best machine? Long arm machine/etc?
If you are just starting out, I wouldn't put the money into a long arm machine, since they are VERY expensive. The best machine to use is one that has a large throat plate (the portion from the sewing needle to the inside edge of the machine). This gives you more room for your fabric to lay, for the part that you are not working on. When sewing straight lines on the top, get a good even feed foot, it feeds all layers into the machine at an even pace and reduces puckers. For any type of curvy sewing, use a quilters foot, it is an open toed foot that you use by either dropping your feed dogs or covering them. Start by using a thin batting, like a very fine 100% cotton batting, such as warm and natural or warm and white. I have found this batting one of the easier ones to use when sewing through the layers, it is easy to use and doesn't slip or cause your layers to be too thick. I would also practice quilting on something other then your quilt before you sew it. There are a couple of practice panels that you can purchase at most quilt shops, there is also a book to go along with it that shows you how to use the panels, you can buy the panels for less then twenty dollors for both of them at most quilt shops. When marking your quilt designs, I have found it really easy to use a paper that is made for this purpose, I think it is called Golden threads. You trace your pattern on the paper and then pin it to your quilt. You then sew right over the paper as if you are tracing it and when you are done, you carefully tear the paper away from the quilt and you are done. I find this is much easier for me then trying to mark the pattern on the quilt. Most of the time, if I mark it with chalk, the chalk comes off too easy, or with the air erasable pens, some of them will fade before you are done with your sewing. You can use templates to mark your quilt with as well, there are many methods of marking from templates, including wash away marking pens (just test it on a peice of your fabric before you use it on the real quilt top). I hope this has helped you get started. I am assuming that you already know how to pin baste or thread baste your quilt before finishing the top, so I did not go into that here. Also, I have found there are a lot good web sites that have tips to read for beginning quilters. I have only been quilting for a few years and have found the web to be a very valuable resource, also shows on tv such as Elenor Burns "Quilt in a Day" and Simply Quilts with Alex Anderson. Hope this helps! Happy quilting. By the way, I recently got a great gift for my birthday that has helped me a lot with finishing my quilts.....my hubby bought me a Little Gracie II quilting frame. This is great for laying out your quilts and doing all the sewing of the top without having to struggle with rolling it under the machine (since I have had three back surgeries and chronic back problems, I need all the help I can get). I would absolutly recommend this frame to every home quilter, as it is not as expensive as some of the other frames, it can be used with most home sewing machines, it is easy to set up and take down, you can sew anysize quilt from wall hangings (or smaller) up to a large queen size on this particular frame size (and you can buy extensions to make king size if you need it, however, I have never nor do I plan on ever making a king size quilt).
Janome 1600P-QC Long Arm Sewing Machine with Grace Frame - Part 1 of 2