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    • export molds made in china >
      • injection mold china tariff
    • injection molding plastics parts and markets we serve >
      • injection molding plastics toys in china Triple-c moulding your toy designs
    • injection molding , what is it and what are the costs?
    • large injection molded parts
  • injection-mold-factory-in-china
  • plastic-mold
    • HIGH QUALITY MOLD manufacturing STARTS WITH A GOOD CONCEPT OF DESIGN
  • plastic injection molding process steps
    • how can thermoplastics be shaped?
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​what types of gates are there in the construction of an injection mold

different types of Gates of an injection molding mould .

types of gates in injection moldingdifferent types of gates in injection molding
Introduction:
 
Every injection mold has to have a gate or opening where the material is transferred into. The size and type of gate plays an important role in the process of injection molding, it may seem insignificant but it is very vital. This article will provide some information about the gate types of an injection molding machine.
 
The size and type of gate has to very accurate and manufacturer’s or mold makers put a lot of care into this, a wrong of gate can mean serious repercussions. It means a lot of wasted time and profit.
 
There are so many uses for plastics, it is found in any common household item or any part or piece for industrial use. So different parts require different gates, for small pieces that would need a small gate and for large pieces they require larger gates or a number of gates. Gates vary in size depending on the size and shape of the part that is manufactured.
 
What are the different types of gates for injection molding?
 
  • Side gates – this is commonly used for molds that have two or more cavities. It is placed at the side of the molds and the gate is done manually by a cutter.
  • Tunnel gates – also known as submarine gates, it can be placed at the side or movable parts of the mold. It is automatically cut as the mold opens. The gate is also placed underneath, which is better than the side gates because it won’t leave any marks on the surface.
  • Banana gates – they are similar to the tunnel gates but as the name says it is shaped like a banana. It is a newer type of gate and won’t leave any marks on the surface.
  • Fan gate – commonly used for large or flat plate parts. It is placed at the sides and manually cut by a cutter.
  • Film gate – used for thin plate parts.
  • Pin gate – for parts that have multiple cavities or chambers. It is usually located at the top.
  • Sprue gate – this gate is suitable for single chamber parts and thick sections because it can hold pressure well. The disadvantage of this gate is that a mark is left on top.
  • Diaphragm gate – is used for cylindrical or round parts. It is used when marks or weld lines on the part is not acceptable.
  • Hot runner gate – the nozzle diameter is as small as possible, used for thin walled parts that require short injection mold cycles. The disadvantage is that it causes ripples on the surface.
 
Conclusion:
 
Choosing the right kind of gate for quality  injection molding in china is very important, careful considerations must be taken by our experienced mold designers, before deciding which appropriate gate is to be used.

​The specifications of the product, the shape and form, the size and other components must be considered for making the right choice. The end product, cost and material waste will be considerable, if the wrong kind of gate is chosen. The size, shape and location of the gate should also be taken into account.

 
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