In injection molding material is fed through a hopper into an extruder, where a reciprocating screw mixes and melts the material then injects it into a mold. Injection molding machines, or presses, are rated by tonnage, which expresses the amount of clamping force that the machine can exert to keep the mold closed during the process.
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1. Detailed Features and Complex Geometry The injection molds are subjected to extremely high pressure. As a result the plastic within the molds is pressed harder against the mold compared to any other molding process. Due to this excessively high pressure, it is possible to add a large amount of details into the design of the part. Furthermore, due to high pressure during the molding process, complex and intricate shapes can easily be designed and manufactured which otherwise would have been too complicated and expensive to manufacture.
From 6 to 6,000 ton clamp capacities, Milacron offers you the widest range of injection molding machines. Choose from all-electric, servo or hydraulic machines with a full range of plastics processing technologies, including multi-component and co-injection.
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So you need a custom plastic part or product, but you don’t know how to get it made. Is it large or small? Should it be flexible or stiff? Is it round, square, or some weird shape? Do you already have a mold, or do you need to have one made? This guide will explain the different kinds of molding processes available today to help you discover the ideal process for your product.
The mould consists of two primary components, the injection mould (A plate) and the ejector mould (B plate). These components are also referred to as moulder and mouldmaker. Plastic resin enters the mould through a sprue or gate in the injection mould; the sprue bushing is to seal tightly against the nozzle of the injection barrel of the moulding machine and to allow molten plastic to flow from the barrel into the mould, also known as the cavity.[12]:141 The sprue bushing directs the molten plastic to the cavity images through channels that are machined into the faces of the A and B plates. These channels allow plastic to run along them, so they are referred to as runners.[12]:142 The molten plastic flows through the runner and enters one or more specialised gates and into the cavity[19]:15 geometry to form the desired part.
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