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Comprehensive Glossary of Common Die Casting Dies Terminology

Die casting, also known as pressure, die casting, stands as a metal casting process revered for its ability to precisely shape molten metal into intricate forms under high pressure. It involves injecting molten metal into a mold cavity at elevated pressures and speeds, followed by rapid cooling to achieve the desired shape. This method is widely employed across various industries due to its capability to produce complex metal parts with high accuracy and excellent surface finish.

To delve deeper into the realm of die casting, it’s imperative to understand the intricate terminologies associated with this process. Here’s an extensive list of die casting terms along with comprehensive explanations:

  1. Die Casting: A metal casting method where molten metal is injected into a mold cavity under high pressure to create intricate parts.
  2. Die-casting Die: The specialized mold used to shape molten metal into desired parts.
  3. Fixed Die: The immobile part of the die-casting die fixed onto the stationary platen of the die-casting machine, often referred to as the “A side.”
  4. Moving Die: The mobile part of the die-casting die that moves with the movable platen of the die-casting machine, also known as the “B side.”
  5. Cavity: The void within the die where molten metal is poured to form the desired part.
  6. Parting Line: The demarcation line where two mold halves meet and can be separated for part removal.
  7. Project Area: The total area projected perpendicular to the direction of clamping force, including the cavity, runner, and overflow well.
  8. Shrinkage: The percentage difference in linear dimensions between the mold cavity and the final cast part at room temperature.
  9. Locking Force: The force applied to the die to ensure proper closure during the casting process.
  10. Pressure Center: The point where the pressure exerted by molten metal on the die is concentrated.
  11. Filling Velocity: The speed at which molten metal fills the mold cavity through the sprue.
  12. Injection Speed: The linear speed of the injection plunger during the injection phase.
  13. Injection Pressure: The pressure exerted by the injection plunger on the molten metal per unit area of the die cavity.
  14. Draft: The taper applied to the walls of the mold cavity to facilitate part removal.
  15. Die Shut Height: The total height of the die in the closed position.
  16. Maximum Opening Daylight: The maximum distance between the moving and fixed platens of the die-casting machine when fully open.
  17. Stripper Distance: The distance required to separate the moving and fixed halves of the die for part and gating system removal.
  18. Casting System: The channels through which molten metal flows into the mold cavity during the die casting process.
  19. Sprue: The channel that connects the pouring basin to the runner in the die casting mold.
  20. Runner: The channel that connects the sprue to the gate in the die casting mold.
  21. Gate: The entrance through which molten metal enters the mold cavity in the die casting process.
  22. Overflow Well: A recess in the die used to collect overflow, oxide, or cold slag from the molten metal during casting.
  23. Air Vent: A passage designed to allow trapped air to escape from the mold cavity during the die casting process.
  24. Clamping Plate of Fixed Half: The plate that supports and fixes the fixed die inserts, cores, guide pins, or bushings.
  25. Clamping Plate of Moving Half: The plate that supports and fixes the moving die inserts, cores, guide pins, or bushings.
  26. Bolster of the Fixed Half: The plate that secures fixed die inserts, cores, guide pins, or bushings in the fixed half of the die.
  27. Bolster of the Moving Half: The plate that secures moving die inserts, cores, guide pins, or bushings in the moving half of the die.
  28. Support Plate: A plate that bears the molding pressure and prevents displacement of moving die modules, cores, guide pins, or bushings.
  29. Space Block: A block-shaped component used to create space for the ejection mechanism and adjust the die’s closed height.
  30. Support Pillar: A cylindrical component designed to enhance the rigidity of the moving die.
  31. Core: A protruding component used to form the internal surface of the cast part.
  32. Movable Core: A core that can be displaced and performs ejection and reset actions with the help of a core-pulling mechanism.
  33. Threaded Plug: A component used to form internal threads in the cast part.
  34. Threaded Ring: A component used to form external threads on the cast part.
  35. Die Insert: A locally manufactured component that is separated from the main body and embedded in it.
  36. Die Insert of Fixed Half: A component fixed in the bolster of the fixed half, forming the main part of the die cavity.
  37. Die Insert of Moving Half: A component fixed in the bolster of the moving half, forming the main part of the die cavity.
  38. Movable Insert: A forming component that is removed from the cast part after ejection and resetting according to the process and structure requirements.
  39. Split: Several separate components used to assemble the core or cavity according to process and structural requirements.
  40. Angle Pin: A cylindrical component inclined to the direction of mold closure, allowing relative movement of the slide with the mold.
  41. Angular Cam: A rectangular-sectioned bent rod that causes relative movement of the slide with the mold during mold opening and closing.
  42. Slide: A component that can slide along guide structures, driving movable cores or inserts to complete ejection and resetting actions.
  43. Core Slide: A molded component consisting of a core and slide.
  44. Angled Sliding Split: A split block that utilizes a matching inclined surface for sliding, often serving molding, ejection, and core-pulling functions.
  45. Finger Guide Plate: A plate with inclined guide slots used to control slide movement for core-pulling and resetting.
  46. Stop Block: A block-shaped component that limits the final position of the slide after ejection.
  47. Wedge Block: A block-shaped component with a wedge angle used to secure the slide during mold closure.
  48. Slide Guide Plate: A plate that acts as a guide surface for the slide, providing sliding guidance.
  49. Wear Pad: A hardened plate or plate embedded with lubricating material installed on sliding surfaces of moving components.
  50. Sprue Bush: A cylindrical component that forms the pouring basin.
  51. Sprue Spreader: A conical component installed opposite the sprue to facilitate metal distribution and smoothly change the flow direction.
  52. Baffle: A component that smoothly changes the flow direction of molten metal in the mold cavity.
  53. Venting Plug: A metal plug with micropores or grooves used to vent gases from the mold cavity during die casting.
  54. Venting Plate: A plate with venting grooves used to vent gases from the mold cavity during die casting.
  55. Guide Pillar: A cylindrical guide component that, along with guide bushings, determines the relative position of the moving and fixed dies.
  56. Headed Guide Pillar: A guide pillar with axial locating steps, providing consistency between the fixed and guide sections.
  57. Shoulder Guide Pillar: A guide pillar with axial locating steps, featuring a larger diameter in the fixed section than in the guide section.
  58. Square Guide Pillar: A guide pillar with a rectangular working cross-section.
  59. Ejector Guide Pillar: A cylindrical guide component used in the ejection mechanism.
  60. Guide Bush: A cylindrical guide component that, along with guide pillars, determines the relative position of the moving and fixed dies.
  61. Headed Guide Bush: A guide bush with axial locating steps.
  62. Straight Guide Bush: A guide bush without axial locating steps.
  63. Ejector Guide Bush: A cylindrical guide component used in the ejection mechanism.
  64. Guide Plate: A plate that forms a sliding pair with rectangular guide pillars.
  65. Ejector Pin: A rod used to eject castings, gating systems, and solidified gating system residues.
  66. Ejector Pin with a Cylindrical Head: A pin with a cylindrical head and stepped shoulder used for ejection.
  67. Shouldered Ejector Pin: A pin with a larger diameter in the non-working section to increase axial stiffness.
  68. Flat Ejector Pin: A pin with a rectangular working cross-section.
  69. Forming Ejector Pin: A pin with an end shape matching the required shape of the casting.
  70. Ejector Sleeve: A tubular component used for ejecting castings.
  71. Shouldered Ejector Sleeve: A sleeve with a larger diameter in the non-working section to increase axial stiffness.
  72. Ejector Pad: A block-shaped component used to form the inner part of the casting and eject it during mold opening.
  73. Stripping Plate: A plate used to eject castings.
  74. Ejector Retaining Plate: A plate used to secure ejection, resetting, and guiding components.
  75. Ejector Plate: A plate that supports ejection and resetting components and transmits machine ejection force.
  76. Stop Pin: A component that limits the reset position of the ejection mechanism.
  77. Return Pin: A rod that resets the ejection mechanism during mold closure.
  78. Ejector Tie Rod: A rod that connects the ejector plate to the ejector retaining plate, transmitting ejection force.
  79. Ejector Plate Tie Rod: A rod fixed to the ejector plate, transmitting machine ejection force.
  80. Ejector Plate Washer: A washer placed between the ejector plate and ejector retaining plate to match the height of the ejector retaining step.
  81. Locating Element: Components used for precise positioning of the moving and fixed dies.
  82. Cooling Ring: A ring-shaped water jacket installed outside the sprue bush.
  83. Cooling Tube: A tubular component used to circulate cooling media in the mold to control mold temperature.

This comprehensive glossary offers a detailed insight into die casting terminologies, essential for achieving superior-quality die castings in diverse industrial applications.

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