With advanced material verification and quality processes we can ensure your tools and parts exceed your expectations. If you’re ready to start your next project, send us your product design information for a competitive quote today.

At Supapeg we specialize in producing high-quality tube forming, metal stamping and plastic injection molded parts and mold tools. We offer machining and finishing services to make tools from a variety of materials, and can produce 50 to 100,000+ finished parts in a wide variety of plastics and metals.

Posted by Paula Hynes | 10 / 23 / 14 0 Comments

Hot runner molds consist of 2 plates that are heated with a manifold system.   The manifold sends the melted plastic to nozzles which fill the part cavities.  There are several types of hot runner systems, however, in general, they fall into two main categories; externally heated and internally heated.  The externally heated systems are well suited to polymers that are sensitive to thermal variations.  Internally heated systems offer better flow control.  The hot runner process eliminates runners entirely, so recycling and regrind (which can only be done with virgin plastics) do not impact cycle times.  A variation of this system is called an insulated runner.  The insulation, rather than heat, keeps the plastic in a molten state.  This system can only accommodate a few types of plastics, specifically semi-crystalline polymers which have a low thermal conductivity.

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The plastic is injected into the mold via the sprue and fills the runners which lead to the parts in the cavity.  In 2 plate molds, the runner system and parts are attached, and an ejection system is used to separate the pair from the mold.  For those of you who assembled a model car at some point in your youth, the runners and the parts were not separated.  The child assembling the model was responsible for that final part of the process. In 3 plate molds, the runner is contained on a separate plate, leaving the parts to be ejected alone.  In both systems, the runner is re-cycled and reground, reducing plastic waste.  However, these processes can increase cycle time.

Every plastic part starts in a mold.   Molds are classified into two main types, cold runner and hot runner.  Each has its advantages and disadvantages.   Your plastic injection molder will be able to give you the costs and benefits of using these different systems.  However, by understanding the key differences of these technologies, you can have a more educated discussion on the type of mold that would best fit your project.

Supa-Peg Australia established for 45 years in all facets of production and importing. We are a based in Yatala Queensland with our main focus in the outdoor industry.

Professionals in the field of plastic injection molding should be your primary resource for determining the best injection molding system for your project.  Look for injection molders who are familiar with all types of plastics processing.  They will be able to provide you with a cost/benefit analysis of the various systems available based on the part and the material used. At The Rodon Group, we can help you navigate the plastics manufacturing process to insure the highest level of quality and efficiency.

If you are like our customers, you think about your product 24/7. You dream of how it will change the market or maybe you’re creating a brand new market. But when it comes to executing the product, you’ve realized you need some help. And that’s where we come in.