Not All Acrylics Are Equal!


The most common name used to describe clear plastic would appear to be Perspex, and there are many others, but they are all actually trade names for Acrylic or PMMA (Polymethylmethacrylate).

Acrylic is used in a huge range of products across a wide range of industries from low-tech to high and from low-cost to high budget.

It can be moulded, machined, fabricated and is widely available off the shelf as sheet, rod, bar, tube etc. Bray Plastics have extensive experience working with and producing acrylic products for their customers.

One recent example was a vacuum door produced for Leskers UK Ltd that was fitted to a high end vacuum chamber, as illustrated in the image below. The door was machined from 80 mm acrylic and finished by hand.

machined acrylic pmma perspex vacuum chamber door

Please contact us at Bray Plastics if you think we can help.

 Clear Acrylic (Poly(methyl methacrylate) is used extensively in the medical industry.

Acrylic vacuum chambers, cabinets, boxes, doors and windows can be found in hospitals and laboratories around the world. Premac lead loaded acrylic is used for radiation shielding of radio isotopes.

Bray Plastics have extensive experience in working with acrylic. Machining, fabricating and forming in acrylics under their various trade names of Perspex, Plexiglas, Acrylite, Altuglas etc.

Acrylic Machining for the Medical Industry

 

If Bray Plastics can help with your acrylic requirements, please call.

Bray Plastics have established a primary position as suppliers to Medical equipment manufacturers.

This video gives a brief glimps of the process to manufacture Glove port assemblies in chemical and biological isolators used extensively by the NHS and research establishments.

Bray have the capacity to machine and form in a variety of plastics including acrylics (and Premac) which are widely used in the medical/laboratory market.

If you think Bray can help you to source quality products please contact us.

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Bray Plastics CNC machine a diverse range of plastic materials. Acrylics, acetal, PVC, ABS, Nylons, Polycarbonate and PTFE to name just a few.
These materials are used throughout industry and in a large number of cases have replaced the more traditional ferrous and nonferrous originals.

Bray’s machining capacity is just one of the services we offer to our customers. Can we help you with yours?

What is CNC machining?

CNC stands for Computer Numerical Control. The CNC Machining process is used in many manufacturing industries and uses computers to control machine tools. All sorts of machines can be controlled by CNC such as routers, grinders, mills and lathes.

CNC machining of plastic
image-1788

A 2D or 3D CAD drawing is created which is translated into a G-code (CNC machining language). The computer can control the exact positioning, depth and speed of the machine to ensure accurate results. CNC machining can be used on plastic and metal. Before the actual cutting a trial run will take place to ensure there are no problems as otherwise there could be damage to materials or machines.

CNC machining is ideal for complex 3D shapes as it is extremely precise and can be repeated in an identical manner countless times.

CNC machining of plastic
image-1789

 

With a history of machining and fabricating with acrylic materials, Bray’s engineering expertise is used by research institutes and scientific laboratories for specialist applications, such as:-

  • X-ray Acrylic panels for isolation cabinets
  • Custom PVC filter housings for chemical and biological filtration
  • Custom x-ray panels in laminated glass and Acrylic combinations
  • Polycarbonate guarding panels for equipment and biological/chemical protection/isolation
  • Vacuum formed containers for bespoke applications in conveying and storage of hazardous materials.

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  plastic acrylic turning

The samples illustrated include milling, turning, routing, engraving, fabrication and laser techniques to both acrylic and polycarbonate materials to achieve the required finish and to the appropriate tolerance.

Can we use our unique expertise to assist your company finding a technical solution? We can help from concept to final production. If you have an application that we could help with please contact us.

Premac® is a lead loaded acrylic copolymer resin and is used for effective radiation shielding, including radiation from x-rays, whilst still being transparent for observations.

Premac® is a very expensive material and has only one manufacturer in the world.

The Atomic Weapons Establishment (AWE) at Aldermarston had a specific machining requirement for this very special and brittle material and entrusted Bray Plastics to carry out the work.

Bray Plastics machine lead coated acrylic Premac

The image above shows a 50mm thick slab of Premac® during the machining process.

It is just one of a range of unique and specialised services Bray can offer in Plastic Fabrication and Machining.

 

 

A component required for a medical application needed to be machined from a solid slab of Acrylic 50mm thick. Bray have a heavy duty router with a work area of 2 meters by 3 meters which was suitable for the task.

Using CAD and CAM software it was possible to nest the components within a large sheet and batch cut the material ready for the next operation.

acrylic machining and routing
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Although this example is for acrylic, Bray can process a whole range of engineering materials including Nylons, Polyethylene, Polycarbonate, Abs, Carbon fibre, Tufnol, as well as closed and open cell foams  to give a sample of just a few. These the images illustrate CAN routing, but our facilities also encompass CNC turning and milling. Allied to our CNC laser Bray’s ability to process plastics and polymers enhance the  designer’s choice for problem solving.

acrylic machining and routing 2

This service is just one of a range Bray is able to offer its customers.

Our Services

 

3D Printing and scanning
Prototyping and Tooling
Vacuum Forming
Machining
Fabrication
Enclosures
Assembly
Laser cutting

Want to know more?

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Bray Plastics Ltd
Cherrycourt Way
Leighton Buzzard
Bedfordshire
LU7 4UH
United Kingdom

Phone: 01525 219100
bray@brayplastics.co.uk

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