Frequently Asked Questions

Melton Plastics FAQs

Plastic injection moulding is one of the most popular methods of manufacturing plastic components. The process involves the raw materials (plastic pellets) to be melted under high temperatures and injected under high-pressure into a mould or tool. Once the plastic has filled the mould’s cavities (areas of the mould that form the desired part), it is given time to cool within the mould. The mould tool is then opened, and the finished component ejected.

Injection moulding is the ideal plastic manufacturing process when you are looking at producing a large volume of products and are looking for the lowest per piece cost after tooling.

Yes, we do have rapid prototyping capabilities, utilising 3D printing. We can also provide machined and vacuum cast prototypes via our selected external partners.

We provide complete mechanical product assembly, whether that is assembly of a few injection moulded plastic parts or complex assemblies, requiring, numerous fasteners, and other components, like, springs, magnets, metal inserts, extrusions, etc. We can handle all sourcing of the entire bill of materials. However, if there is anything that we cannot do, such as complex electronics, then we have partners that we can work with.

We can source a variety of types of packaging for our customers. We are happy to work with you to specify what you need and then we can utilise our supply chain to get the best deal possible.

We have 7 injection moulding machines ranging from 350T down to 50T.

Melton Plastics has its’ own in-house toolroom to make, repair and service tools. However, we also use long term trusted suppliers in China. We offer all options to our customers so that they can choose the best solution for their project.

Yes, we do. Our design engineers are experts at helping you optimise your part design for injection moulding.

Under the new management we achieved ISO9001 quality certification in 2019. We’d be happy to forward you our ISO9001 certificate. Please get in touch if you’d like a copy of our most recent ISO 9001 quality system audit.

We use a wide variety of thermoplastics materials. While our most commonly used polymers are ABS, PC, PP, SAN, HDPE, PA6, POM. We have extensive experience of working with virtually all types of polymers, including, PPE, PPS, PEI, glass and carbon filled materials, etc. The only polymer we DO NOT use is PVC.

Quality tooling produced in fully hardened steel and with good maintenance processes, should be expected to produce 1 million shots before extensive refurbishment cost.

We have extensive thermoplastics materials knowledge. Based on the application needs, we can advise on the correct type, grade and colour of material for your components and discuss options for supply.

Depending on the nature of the application, we do use recycled plastics.

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Our goal is to be a Net Zero company by 2030 and we have already started developing plans of how we intend to achieve this goal. While NET Zero is one of our longer-term goals of being more environmentally friendly, we constantly review our working practices and process to see how we can reduce our impact on the precious resources of our fragile planet. These include reduction of packaging we use, to using ecofriendly packaging tapes. We have also invested in injection moulding machines that reduce our CO2 footprint by 75%. Continue to watch for updates on our sustainability initiatives via our blogs.

Our only plastics manufacturing process is injection moulding and we don’t do any blow moulding.

Our moulded parts range from a few millimeters to a over 500 mm and can weigh from only a few grams to upto 1.2 kgs.

We do manufacture some medical and healthcare products. However, we don’t have cleanroom facilities.

Depending on the part size and type of injection moulding tool, the weight of tools can range for a few kgs to many tonnes.

Our moulding machines range from 50T to 350T.

We are located in Carluke, Lanarkshire in the central belt of Scotland. You can find our location on our contact us page via the map link provided.

This depends on the type of prototype tool and its complexity. Some 3D printed tools can be made in a few days and aluminium machined tools can take 2 to 4 weeks.

If your part designs are completed and suitable for injection moulding, then an injection moulding tool can be manufactured in 5 to 6 weeks. Following manufacturing of tool, if no further modifications are required then moulded part can be supplied with a few weeks. Based on our experience of a majority of projects, we’d recommend budgeting 3 to 4 months for tool manufacture, design updates, sample reviews and final product moulding.

We can ship products to anywhere in the world, excluding countries that are not on the sanctioned list of countries under UK laws and guidelines.