ALNO Guidelines to Injection moulding (Part 2)

Wall thickness

The wall thickness of injection-moulded parts needs to be observed properly to avoid potential problems such as leaving sink marks and letting your part warp.  At ALNO we recommend different thicknesses depending on the material you are using and the eventual use of your final product. 

Surface finish

The finishes available to you at ALNO product services vary according to you intended use and can range from all ranges of cosmetic finishes, EDM or higher-end finishes.

Radii

ALNO uses an automated CNC milling process to create the mould for your parts.  However, some part edges will end up with a radius rather than a sharp corner or edge. This does not typically involve the need to change a model, but the designer should be aware of these before moulds are made. 

ALNO product services manufactures all your parts locally in our workshop on the New South Wales Central Coast.  We provide innovative solutions and high-speed solutions so contact us today for a quote.

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CNC Machining  |  Injection Moulding

ALNO Guidelines to Injection moulding (Part 1)

Injection molding

Injection molding, a very simple way to mass produce plastic parts but can also be a very tedious and time-consuming task. When you want a new plastic part through injection molding, ALNO product services provides a comprehensive injection molding solution. Before we make your mold however there are a few guidelines we ask you follow to ensure a high quality mold that can last you the entire life that you want to sell your plastic injection molded product.

Mold Size

Please communicate how large you want your part to be early into the manufacturing process. Our machines provide a large range of solutions but there are some limitations to the size of the mold that we can produce. Depth of the part, degrees for draft (angle) are also important considerations. You must also take note that deeper parts may be limited to a smaller outline.

Drafting the mold

The draft is a taper that needs to be applied to the faces of the part to stop it from being parallel to the motion of the opening of the mold. This keeps the part from being damaged due to scraping as the part is ejected out of the mold. Some draft recommendations are as follows:

• 0.5 degrees on all vertical faces is strongly recommended
• 2 degrees works well as a standard solution and in most circumstances
• 3 degrees is an industry minimum for when metal slides on metal
• 3 degrees is the recommended requirement for a light texture
• 5 or more degrees is the recommended requirement for a heavy texture

Tolerances for your injection molding part

For all of your injection molding needs at ALNO Product Services we can maintain high machining tolerances with an included resin tolerance, contact us or visit our website for more details.

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