B&C Plastics is an experienced and innovative product design and development company based in Queensland, Australia. With decades of experience in plastic injection moulding and toolmaking, we have helped numerous companies take their idea from concept through to manufacture.

Moulds are the tools used in plastic injection to create the actual plastic product. Our toolmakers with the designs created as part of the design process, to produce the moulds that will be used in the manufacturing process. The mould is then filled with the liquid plastic, which then hardens inside the mould, creating the desired shape.

Most moulds are made from one of four different types of materials.

Once a decision on the best material is made, our toolmakers mark out the raw materials and then shape your mould using CAD machines.

We use both CNC machines that quickly create accurate complex mould designs, as well as Electrical Discharge Machines (EDM), which are ideal for shapes that are difficult to machine using traditional means. EDM allows pre-hardened moulds to be shaped without the use of heat treatments. We can also create moulds using traditional manual machines where needed.

Call Us on 07 3208 0555

At B & C Plastics our injection moulding department has an advanced knowledge of injection moulding, process control, trouble shooting and polymer selection. Their highly experienced and fully qualified plastic injection moulding team has the ability and the resources to deliver a high specification product that maintains critical tolerances.

For all your Injection Moulding requirements, you can't turn past B&C Plastics.

B&C Plastics offer:

• Quotations in 24 hours
• In house product development, design and prototypes
• Small enough to care, big enough to deliver the products you need with the price and service you desire
• Diverse capability of 25 tonne to 400 tonne injection moulding machines
• Ultrasonic welding
• Plus general engineering

You can save money by sourcing local products

In recent years many businesses went off-shore to have their new product or invention taken from concept to manufacturing, as a way to cut costs. Howerver, smart businesses now realise local suppliers of injection moulding are an even better way to save costs in the long run.

When business inventors come up with a new idea for a product, they need to take their concept from an idea through to prototype, tool manufacturing and then finally product manufacturing. For the most part this means that inventors need plastic moulding to make their dream into a 3D reality.

Inventors need to be able to communicate with their tool making and plastic injection moulding company to discuss options for effective manufacture as well as create design modifications for the best outcomes. Often this is very hard to do if you have gone offshore to save cost.

If you are a business inventor, or your business has a new product it needs to prototype, you need B&C Plastics for injection moulding in Brisbane.

What is Plastic Injection Moulding?

Plastic Injection moulding is a proocess for producing machine parts from both thermoplastic and thermosetting plastic materials. Through this method of constuction, high quality parts of incredible strength can be produced out of plastic materials. Material is fed into a heated barrel where is kept liquid, and then injected into the mould of whatever shape you want to make. The mould for the plastic is usually created from aluminium or steel.

How does Injection Moulding Work?

Plastic injection moulding produces plastic parts by forcing molten plastic into a mould where it cools and hardens. In plastic injection moulding, granular plastic is fed by gravity from a hopper into a heated barrel. As the granules are moved forward by a screw-type plunger, the plastic is forced into a heating chamber, where it is melted. As the plunger advances further, the melted plastic is forced through a nozzle into the mold cavity. The mold remains relatively cold so the plastic solidifies almost as soon as the mold is filled.

Who uses Plastic Injection Moulding?

You wouldn't believe how much is done through injection moulding. Milk cartons, conatiners, juice bottles, bottle caps, car dashboards, pocket combs, and pretty much any other palstic object you pick up today was made through injection moulding. Injection moulding costruction techniques have huge production rates, a wide range of possible materials for construction, low labour costs and minimal scrap losses.

In 1995 there were approximately 18,000 different materials available for injection moulding and that number is increasing every day of every year.

Designing for Plastic Mould Injection

Some things to consider if you are designing for mould injection.

It is important when designing products for injection moulding that you consider how they will be formed in the machine, how they will be taken out of the machine, and the structure of the final product. Some important guidelines are:

1. Use approximately uniform wall thicknesses throughout your designs.
2. Keep walls thin - typically between 1/32" and 1/10". This allows for proper cooling and reduces cost by minimizing use of material. Thin walls also reduce problems with material shrinkage. Although some unevenness will occur due to shrinkage, walls as thick as 1/5" can be used. Keep wall thickness at least wall length / 50. Keep 90 deg walls under 0.25" high. Keep thickness of ejection pin surface wall at least .07".
3. To strengthen parts, instead of using thicker walls, use additional structures such as ribs. Use fillets at the base of ribs. 4. When using a rib make it about half the main wall thickness.
4. Round corners and edges wherever possible.
5. For easy release of the part from the mold, add a slight taper to the sides (typically ~ 2 deg) - especially for textured walls and walls higher than 0.25".
6. Avoid undercuts that are impossible to remove from the mold.
7. Lighter colors hide flow patterns better than dark colors.
8. Where walls meet at a 90 angle, round inside and outside to at least .05" radius - sharper outside corners can create molding problems and sharper inside corners will increase tooling cost.
9. Keep holes at least .015" from edges.

Talk to B&C Plastics for your next Injection Moulding project - call 07 - 3208 0555