injection mold types

Plastic Injection Mould Types

Depression / Loftier Cavitation
Single cavity molds are designed to produce 1 part per wheel. They are a cost-effective arroyo when part volumes are low as they are less expensive to build. They also have a shorter lead time. The disadvantage is a higher piece part cost in molding production.

Multi-cavity molds produce more parts per wheel. The major advantages are increased capacity and lower piece part costs equally more than parts can be produced within a comparable cycle time.

Family Mold
A family mold has a single mold base but two or more different cavities, allowing for the production of 2 or more different parts. All the parts can either be produced simultaneously or shut-offs tin be used to isolate production to selected cavities. For best results in molding, the parts should be similar in size, shape, resin, and anticipated volumes, especially if the intention is to run all parts at the same time. Automation may be necessary to separate the pieces during or subsequently product.

If mold cost is a driving factor and volumes are low, a family unit mold can provide cost savings and versatility.

Unscrewing Molds
Unscrewing molds are the nearly common method of creating threaded holes inside a plastic part. These molds are automated with small bulldoze systems (rack & pinion, electric, or hydraulic motors) that are tied into the procedure and rotate threaded features to extract undercut features. Threads can be internal or external, and the extraction is tied into the press cycle.

Multi-shot / multi-component tooling allows a production designer to use 2 or more than different materials on the same role within the aforementioned bicycle. In that location may be a variety of reasons why differing materials would exist desired, including dissimilar physical properties or merely appearance. These molds oftentimes apply multiple manifolds inside 1 tool. Multi-shot tooling tin can exist an elegant solution for complicated products, and can be used for color changes inside a product line.

Specialized presses and molds are necessary to run multi-shot tooling. Multiple auto nozzles, hot runner systems and mold rotation may become necessary. While Matrix currently does non have whatever multi-shot molding presses on our floor, we are particularly adept at designing and building these complicated tools and have been doing so for decades.

Hot Runner Molds
Hot runner tools use a temperature-controlled manifold to profoundly reduce or eliminate runner scrap from the cycle. Injection points can be outside the part or directly into the part. This can greatly amend cycle times, equally a sprue or runner organisation is often a determining factor on the mold cycle. And, eliminating the runner saves expensive wasted material.

Hot runner molds require a temperature controller for the press they run in, with the controller being sized to match the manifold in the mold. Some mold maintenance costs are higher on a hot runner tool, but they often pay for themselves in the long run through fabric and bicycle fourth dimension savings. This is specially truthful of applications that require expensive engineering class resins or high almanac volumes.

Cold Runner Molds
Cold runner molds are good examples of more traditional tooling in that they employ sprues and runners to gate into the part. This is typically the to the lowest degree complicated form, withal may result in larger amounts of wasted material and slower running cycles. Depending on the awarding, a percentage of wasted cloth may be re-basis and re-processed for hereafter use, though this could touch the physical properties of the resin.

Dealing with more advanced, loftier-cost materials such equally engineering and medical form resins or the disability to utilize regrind in your application may lend itself to using a more efficient hot runner mold for your projection.

Insulated Runner Molds
Insulated runner tools resemble more traditional common cold runner molds only apply cartridge heaters or other methods of heating to form a surrounding layer of molten resin, forming an insulated ""cull"" to create a like effect to a hot runner system. This arroyo is less expensive than using a hot runner which requires a temperature controller and also has the benefit of assuasive for faster color and material changes. Nevertheless insulated runners are not suitable for all types of materials and typically do not piece of work well with more than demanding technology grade resins.

Two / Iii Plate
Three-plate molds are cold runner tools, only by calculation a third plate to the runner system, you are able to locate your injection point into virtually any location on the tool. This is usually less expensive than adding a hot runner arrangement, withal this blazon of mold frequently has large and unwieldy runners, which can be more difficult to automate.