An injection moulding machine melts plastic granules, injects the melt into a closed steel mould under pressure, and ejects a finished part once it cools. Nearly every plastic product, from bottle caps to car dashboards, is made this way. For a manufacturer, the choice of injection molding equipment decides part quality, cycle time, and cost per piece. This guide from Advance Plastic Machinery covers the process, machine types, applications, and how to match tonnage to your production.
An injection moulding machine has two halves: an injection unit that melts and pushes the plastic and a clamping unit that holds the mould shut against injection pressure. The plastic injection moulding cycle repeats the same four stages for every shot, which is why an injection molding equipment turns out thousands of identical parts with very little variation.
Every injection molding equipment is built around a hopper, a heated barrel with a reciprocating screw, two platens, tie bars and a controller. Clamping force, measured in tonnes, is the headline specification of any plastic injection molding equipment, because it sets the largest part area the mould can hold shut. Shot weight and tie-bar spacing come next when you compare one injection moulding with another newer version, since they decide how heavy a part you can mould and how big a mould will fit.
A molding machine is classed by how it is driven. Hydraulic machines give high clamping force at a lower purchase price, so they suit large parts. All-electric machines use servo motors, which make them quieter, more precise, and cheaper to run for small precision parts.
The injection moulding machine pairs a hydraulic clamp with an electric screw drive to balance force and energy use.
Because one injection-molding machine can run many moulds and materials, the same injection-moulding equipment serves very different sectors. A single molding machine on the shop floor may produce PP caps this month and ABS housings the next, with only a mould and material change in between.
Industry | Typical moulded parts |
Automotive | Bumpers, dashboards, door trims, and lamp housings. |
Packaging | Caps, closures, thin-wall containers, and crates. |
Household | Chairs, buckets, storage bins, and kitchenware. |
Electrical and electronics | Switch plates, casings, and connectors. |
Medical | Syringes, vials, and device housings. |
Production planning starts with tonnage. A small injection molding equipment suits light parts that cycle quickly, while a large injection moulding machine handles big, heavy mouldings with long flow paths. A plastic moulding machine that is too small gives flash and short shots; one that is too large wastes power and floor space. For a quick estimate, multiply the projected area of the part in square inches by 2 to 5 tonnes, depending on the material, and add a 10 to 20 percent margin. As a rough guide, machines under 150 tonnes cover caps and small components, 150 to 450 tonnes cover housings and crates, and anything above that is for furniture and automotive panels.
Each plastic molding machine below is listed with its key specifications and what they mean for output. Pick the plastic injection molding equipment that fits your part and use the Buy Now link under it.
Specifications: 360-tonne hydraulic clamp. This model is typically fitted with an 80 mm screw, a shot weight of about 1,200 g, and roughly 735 x 735 mm between tie bars.
Efficiency and capacity: The hydraulic clamp spreads force evenly over the platen, which limits flash on wide parts and keeps rejects low. It suits crates, appliance housings, and automotive trims in medium to high volumes.
Specifications: 85-tonne clamping force (about 830 kN) in a compact frame that needs little floor space.
Efficiency and capacity: Short strokes and small shots mean quick cycles and low power use per part. Run it with multi-cavity moulds for caps, closures, and electrical components in large daily quantities.
Specifications: 650-tonne clamping force. The B2 series uses a fast-acting toggle clamp with automatic tonnage setting, closed-loop hydraulics, and a six-stage injection profile.
Efficiency and capacity: Closed-loop control keeps every shot consistent, and staged injection fills long flow paths without sink marks. It is built for bumpers, chairs, and storage bins, where one large part comes out per cycle.
Specifications: Tonnage, screw size, and shot weight are listed on the product page.
Efficiency and capacity: Compare those figures with your mould size and part weight before ordering.
A used injection moulding machine costs far less than a new one, but its condition decides whether it pays back. Check these five points on any used plastic injection molding before you order.
Advance Plastic Machinery supplies used injection moulding equipment from trusted brands such as Nissei, Kawaguchi, and Fomtec, so you can find a molding machine for almost any tonnage range. Whether you need a compact plastic moulding machine for a new unit or a high-tonnage plastic molding machine to add capacity, our team helps you match the right injection moulding machine to your mould, material, and budget.
The right injection moulding machine is the one whose tonnage, shot weight, and tie-bar spacing match your mould and your daily output target. Get that match right, and you gain faster cycles, fewer rejects, and a lower cost per part. Compare the models above, then order your injection moulding machine from Advance Plastic Machinery.
It is used to mass-produce identical plastic parts such as caps, containers, housings and automotive components.
Multiply the projected area of the part by 2 to 5 tonnes per square inch and add a 10 to 20 per cent margin.
Common thermoplastics such as PP, HDPE, ABS, nylon, and polycarbonate.
Yes, if the screw, barrel, tie bars, and hydraulics are in good condition and it has been tested under power.
You can order directly from the product pages at advanceplasticmachinery.com.
An injection moulding machine melts plastic granules, injects the melt into a closed steel mould under pressure, and ejects a finished part once it cools.
A vertical plastic injection machine is an injection moulding machine whose clamping unit opens and closes up and down, so the mould sits flat and
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