Showing posts with label Vacuum pump with vacuum chamber. Show all posts
Showing posts with label Vacuum pump with vacuum chamber. Show all posts

How to Choose the Right Vacuum Chamber for Your Needs

Posted by EnvironMolds , Labels: , , , Sunday, August 13, 2023 10:12 PM

In this article you will discover the power of vacuum chambers - sealed containers devoid of air, providing low-pressure environments for precision manufacturing, research, and experimentation. Their benefits include creating precise parts, studying materials in a vacuum, contaminant removal, and controlled experimentation. As technology progresses, new pumps, materials, and applications promise an even brighter future for vacuum chambers.

What is a vacuum chamber?


A vacuum chamber is a sealed container that is evacuated of air. This creates a very low-pressure environment, which is ideal for a variety of applications, such as precision manufacturing, research, and testing. These are used to create parts with very tight tolerances, as well as to study the behavior of materials in a vacuum.



How do Vacuum pump with vacuum chambers work?


They work by using a vacuum pump to remove air from the chamber. The vacuum pump creates a low-pressure environment inside the chamber, which allows for the precise manipulation of materials.

The benefits of using a vacuum chamber


There are many benefits to using it. Some of the most common benefits include:

  • The ability to create parts with very tight tolerances.
  • The ability to study the behavior of materials in a vacuum.
  • The ability to remove contaminants from materials.
  • The ability to create a controlled environment for experiments.

Different types of vacuum chambers


There are many different types of vacuum chambers available. Some of the most common types include:

  • Diffusion pumps
  • Turbomolecular pumps
  • Cryogenic pumps
  • Ion pumps

How to choose a vacuum chamber?


The best way to choose this is to consider your specific needs. Some of the factors you will need to consider include:

  • The size and shape of the parts you will be creating.
  • The level of vacuum required.
  • The budget you have available.

The future of vacuum chambers


As technology advances, these will become even more sophisticated and powerful. Some of the exciting developments that are on the horizon include:

  • The development of new vacuum pumps that are more efficient and powerful.
  • The development of new materials that can withstand high vacuum environments.
  • The development of new applications for vacuum chambers

Conclusion


Vacuum chambers are a versatile and powerful tool that can be used for a variety of applications. They are essential for precision manufacturing, research, and testing. As technology advances, these will become even more sophisticated and powerful.

Its future is bright. With the development of new vacuum pumps, materials, and applications, these will play an even greater role in our lives. They will be used to create new products, improve existing products, and advance our understanding of the world around us.

Unlock the Potential of Precision: Explore Vacuum pump with Vacuum Chambers Today!Take Your Research and Manufacturing to the Next Level with Vacuum Chambers!

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The Molding and Casting Approach to Making Replicas

Posted by EnvironMolds , Labels: , , , , Friday, July 1, 2022 1:43 AM

Mold making and casting together form an efficient process for reproducing almost anything. There are clear differences between the two techniques and artists should know the ins and outs of both.

The most common method of making an exact three-dimensional replica of an object is molding and casting. In fact, most of the everyday items that people use in their homes and offices have undergone the molding and casting process.

Mold making


The mold forms the first step of making the replica. This is a hollow cavity of the shape of the model or master that is to be reproduced. It is also considered as a negative of the desired object.

Molds can be made with different materials and there are various techniques for the same. While anything like clay, wax, resin, silicone rubber, polyurethane rubber or thermoset mold rubber will lend itself well for making molds, the general consensus is that molds should be made with flexible materials as this makes it easier to demold the cast.

When working on molds, the mold making material has to be mixed properly and may even require a vacuum pump with vacuum chamber to ensure that it is free of air bubbles.

The best part about molds is that most of them are reusable and can be used for making multiple casts. But keep in mind that while some molds lose their shape quickly and are good for single castings only, others will also have a limited shelf life and will start to deteriorate with time.


Casting


While the mold is the first stage, casting forms the final stage that delivers the finished replica of the original model. A casting is usually made by pouring the casting material into the hollow mold. It is allowed to cure and then extracted to obtain the final product. This can be sanded, painted or finished as desired.

Here again, there are different techniques for casting and varied materials lend themselves well for the casting process. Yet, in general, it is better to use materials that cure to a hard form as this ensures efficiency in the process and durability in the final cast. The materials that are commonly used are plaster, gypsum, concrete and polyurethane resins apart from an assortment of rubbers. A vacuum chamber may again be required – especially for rubbers – to ensure that the cast is smooth and blemish free.

As the casting is the finished product, it obviously cannot be used in the process again and again. However, at times, casts are used to make secondary molds as they already hold the desired shape.

In sum, mold making and casting are used in conjunction to make duplicates of varied items. The have their own inherent characteristics and artists have to familiarize themselves with all the features before attempting to use them. These processes can also be used for other purposes like mask making and doll reborning. Life casting also draws on this to make reproductions of the live human body!

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Learning the Mold Making/Casting Lingo

Posted by EnvironMolds , Labels: , , , , , Monday, August 2, 2021 3:09 AM

What is the negative image of a model called that you will make before making a positive replica? What are the holes on the top or bottom of a mold called? Know the terms that go with molds and casts right away!



The world of mold making, casting and life casting comes with its own plethora of terms and phrases. Familiarity with them is essential.


  • Mold – It is a negative impression of the model, usually in the form of a hollow cavity.
  • Cast – This is a positive duplicate of the model which can be in any other material or color as desired.
  • Cold cast – This is a faux cast – it is made of resin but can duplicate the look of metal, stone or wood.
  • Life cast – The three-dimensional representation of a live person – it can be the face, hands, feet, torso or entire body.
  • Pot time – Also known as working time, this is the time on hand to work with a material – it includes the mixing and application time - before it will start to set. After this, the material will not work properly.
  • Cure time – This is the time that the material will take to get completely cured. It can range from just a few minutes to hours or even a few days.
  • Shelf life - The period of time a material can be stored and remains suitable for use.
  • Mix ratio - The proper proportion (either by weight or volume) of material and catalyst (oftentimes referred to as Parts A and B) to be combined.
  • Shore hardness – This is a measure of the hardness of a given material or how resistant it will be to permanent indentation.
  • Release agent – A material applied in a thin layer to the surface of the model or mold so as to allow the subsequent mold or cast to be demolded easily.
  • Sealer – Another material that is applied on porous models to seal the pores and prevent the mold making material from getting absorbed.
  • Demolding – The process of removing a model or casting from a mold.
  • Parting line – A marking line which denotes where the parts of the mold should meet.
  • Keys – These are created at the ends of multi-part molds to join the different parts together to form a complete mold.
  • Spues – These are the small holes which will help release the air trapped inside the mold.
  • Pour hole – This is created as an opening to allow the casting material to be poured into the mold.
  • Viscosity – This is the thickness or thinness of the material and will dictate how easily it will flow. Less viscous materials are thinner and flow easily.
  • Pressure pot – Resins are usually cast under pressure that will compress the trapped air to miniscule size.
  • Vacuum chamber – The rubber mix is usually churned using a vacuum pump with vacuum chamber. The vacuum chamber will suck out the air and not allow bubbles to appear on the rubber mold or cast.

Armed with this detailed knowledge, get going right away!

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Eliminating Air Bubbles in Molds and Casts

Posted by EnvironMolds , Labels: , , , , , Friday, December 27, 2019 3:40 AM

There are different mold making and casting equipment that can be used to make bubble-free molds and casts. The suitability of a given equipment depends on the nature of the material and other factors.

One of the most taxing things when making a mold or cast is dealing with the air bubbles. Some air is bound to get trapped into the material no matter how carefully the artist mixes and pours the material. Once set, this shows up as unsightly warts on the surface of the mold/cast and makes it mostly unusable.

Fortunately, there are various tricks and even mechanical equipment for eliminating these pesky air bubbles. While pouring the material in a thin and steady stream from a corner and pricking the bubbles with a pin can help to some extent, it is always better to use an apparatus like vibrating table, pressure pot or a vacuum pump with vacuum chamber.

This brings us to the question – which of these equipment is the most effective in getting rid of the trapped air in the mold making or casting materials?

Well, there is no single-point solution as such.

A vibrating table uses the simple technique of pulsating the material to shake out the bubbles. This will reduce the bubbles but cannot deair the material completely. Careful pouring will reduce the propensity of bubbles for sure.

On the other hand, a pressure pot is best suitable for materials that will cure to a rigid form. Like resins for example. It is better to avoid pressure casting soft rubbers as the air bubbles are bound to return once the mold or cast is exposed to normal air pressure. A rubber mold or cast is even likely to collapse in the areas where air remains trapped under the surface.

A vacuum chamber with pump is best suited for removing air from the rubber materials. Artists usually leave the rubber mold or cast to cure in the vacuum inside the chamber and the air will not return later!

All mold making and casting materials and equipment can be easily sourced from the EnvironMolds website, https://www.artmolds.com.

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Vacuum Pump and Chambers For Your Art Studio

Posted by EnvironMolds , Labels: , , , , Monday, May 13, 2019 5:20 AM

Mold making and casting will usually require a vacuum chamber and pump for eliminating trapped air from the material. Otherwise the air will end up marring your artwork and make it look unsightly.

Resins and rubbers are the most commonly used materials for making molds and casts. They are easy to use, capture details well and prove to be durable as well. However, the chief issue with using these materials is their propensity to trap air easily. This ends up as wart like indentations that create hideous surface defects on the finished castings.

The best way to eliminate the air bubbles is to use a vacuum pump with vacuum chamber. All you have to do is mix the resin or rubber and place it in the vacuum chamber. The vacuum pump will use pressure to pull out the air from the chamber and create a deep vacuum inside.

Therefore, this equipment makes a perfect addition to a mold maker or casting artist’s studio. The EnvironMolds website Artmolds.com provides a range of studio equipment including vacuum pumps and chambers. The ArtMolds vacuum chamber with pump is very popular among artists because of its low cost, professional grade quality and safety. The chamber has a 4 gallon capacity while the pump can pull up to 29 inches of mercury (Hg) at sea level, which is ideal for deairing pot life resins and silicones. The vacuum pump and chamber can be bought together or separately as well.

Apart from this, you also have the option of RotoKinetic vacuum chambers that are available in three different sizes – 1.25 gallons, 2 gallons and 5 gallons. They come with a built in solid state vacuum pump and require only an external compressed air supply. Alternatively, you can also order the vacuum chamber without the pump - a vent valve will be supplied with shutoff valve.

Similarly, the website also offers other vacuum pumps like USG Two-Stage 3 CFM Vacuum Pump, Robinair 6 CFM Vacuum Pump and Venturi type compressed air vacuum pump. All of them work well with the ArtMolds vacuum chamber.

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Vacuum Chamber: A Must For Deairing

Posted by EnvironMolds , Labels: , , , , Monday, April 2, 2018 1:44 AM

I use a variety of resins for my casting works. Most of my resins have a propensity to trap air and I regularly place the mold with the resin in a pressure pot. This removes all the air from the material and makes it disappear. As I let the cast cure in the pot itself, I get a perfectly bubble-free casting.

However, when I moved to making rubber casts, the bubbles seemed to return once I removed the rubber from the pressure pot. After several failed attempts, I gave up and bought a vacuum pump with vacuum chamber from artmolds.com.



Actually I had called up my regular supplier at EnvironMolds, LLC to discuss the issue first. He told me that a pressure pot does not work as effectively for soft casting materials like rubbers, especially silicones.

The suggested vacuum pump with vacuum chamber was reasonably priced and very easy to operate too. All I had to do was mix the rubber and pour it into a large container. The container should be big enough to accommodate four times the amount of rubber I wish to vacuum, as the rubber expands under a vacuum.

Simply switching on the machine initiates the vacuum process that removes all the air from the rubber. All it takes is a few minutes and the air is eliminated, never to return. I leave the container in the chamber for some time and later open the plate slowly to allow a gradual introduction of air.



As an added precaution, I place the mold box with the casting rubber in the vacuum chamber once again. The vacuum pump works its magic and the material easily flows into the tiniest grooves and undercuts of the mold. My casting turns out flawlessly without any sign of the slightest of bubble.

I seriously recommend that every mold maker or casting artist should own a vacuum chamber irrespective of whether they work with rubbers or not!

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