Szerszámkészítés / Tool Fabrication

Különféle fém megmunkálási módszerekkel készítünk többféle felhasználásra alkalmas szerszámokat. Főként fröccsöntő, extrudáló technológiához, de igény szerinti kialakítású prés és egyéb felhasználási területen alkalmazott szerszámok készítésével is foglalkozunk.

PLASTIC INJECTION MOLD TOOL

 The mold tool is the key component in the injection molding of plastic: 

  1. It provides a passageway for molten plastic to travel from the injection cylinder (barrel) to the mold cavity.
  2. It allows the air which would be trapped inside when the mold closes to escape.  If the air could not escape (be vented) then the molded component would contain voids (air bubbles) and have a poor surface finish.
  3. It cools the molding until it sets.  The temperature of the mold is controlled because it is important that the molding cools at the correct rate to avoid distortion and stress.  In most systems water circulates through channels drilled through the mold similar to a car engine cooling system.
  4. By means of ejectors the finished molding is pushed from the mold.

THE PLASTIC MOLD TOOL

  

  1. Guide Pins – fixed to one half of the mold and align the two halves by entering the holes in the other half.
  2. Runner – passageways in the mold connecting the cavities to the sprue bush.
  3. Gate – Frequently the runner narrows as it enters the mold cavity.  This is called a gate and produces a weak point enabling the molding to be easily broken or cut from the runner.
  4. Sprue Bush – Tapered hole in the centre of the mold into which the molten plastic is first injected.
  5. Locating Ring – Positions the mold on the fixed platen so that the injection nozzle lines up with the sprue bush.
  6. Mold Cavity – The space in the mold shaped to produce the finished component(s).
  7. Ejector Pins – These pins push the molding and sprue/runner out of the mold.
  8. The Shot – Total amount of plastic injected into mold.
  9. Sprue – Material which sets in the sprue bush.
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