MOLD CHANGEOVER CHECKLIST
This proceedure was written for the Hayssen AUTOBLOW with all available options but it is easily adaptable to most any blow molding machine.
The speed and accuracy with which you accomplish a mold change on your machine has a profound influence on the overall efficiency of your blow molding operation. Therefore, it's important that you proceed according to a well-designed plan when you tackle the task of a mold change.
Although each mold change often has its own particular requirements, the basic approach and sequence of steps which you should follow in order to change your machine over in an efficient and safe manner is common to all mold changes.
You can increase your efficiency by using a detailed checklist which outlines the mold changeover steps in a logical sequence. With small adaptations, this list will fit the majority of all mold changes.
Use this checklist as your guide, or as a basis when you create your own checklist. You might like to make a copy of your checklist and actually check off the tasks listed as you complete them during the mold changeover until you are familiar with the sequence.

CHECKLIST

1. Bring all needed tools, auxiliary materials, changeover parts and the mold to be installed to the machine.

2. Remove discharge table.

3. Remove bottle grippers.

4. Remove gripper arms.

5. Remove pneumatic trimmer tooling (knife and nest). [Optional]

6. Remove wide mouth trimmer/reamer neck ring. [Optional]

7. Remove parison knife blade.

8. Raise blow mandrel
IF NEW NECK FINISH SIZE IS THE SAME AS THE PRESENT SIZE,
IT MAY BE POSSIBLE TO SKIP STEPS 9 THROUGH 13

9. Remove moil stripper insert(s).
IF NEW NECK FINISH SIZE DOES NOT FIT RANGE OF PRESENT BLOWPIN

10. Disconnect blowpin water and air hoses.

11. Remove blowpin(s).
IF NEW NECK FINISH SIZE DOES FIT RANGE OF PRESENT BLOWPIN

12. Remove blowpin tip.

13. Remove cutting rings, deflash sleeve and spring.

14. Disconnect mold cooling lines.

15. Remove scrap chute.

16. With platens open, remove outer (left) mold half.

17. Close platens and remove inner (right) mold half.
IF NEW CONTAINER IS ROUGHLY THE SAME DIAMETER AS THE PRESENT ONE,
IT MAY BE POSSIBLE TO SKIP STEPS 18 THROUGH 27

18. Loosen all die ring centering and retainer screws.

19. Disconnect and remove die tip heater band from first head.

20. Remove and clean extrusion tooling from first head.

21. Repeat steps 16 and 17 for remaining heads.

22. Clean interior of extrusion heads (mating surfaces).

23. Install new extrusion tooling. (Use antiseize compound on all threads).

24. Center die ring to die pin visually.

25. Reinstall and reconnect die tip heater bands.
IF EXTRUSION TOOLING POLARITY HAS CHANGED

26. Reverse polarity switch and recalibrate programmer stroke.

27. Adjust programmer linkage for correct minimum die gap.

28. Decrease mold closing speed. Leave platens closed.

29. Install inner (right) mold half. (Screws fingertight).

30. Open mold.

31. Install outer (left) mold half. (Screws fingertight).

32. Jog mold closed in dead slow speed. Align mold halves.

33. Tighten mold mounting screws.

34. Install and adjust platen stand-offs. (Short molds only).

35. Connect cooling lines to new mold.

36. Restore platen closing speed to previous value.

37. Reinstall parison knife blade.

38. Operate extruder to produce parison.

39. Straighten parison.

40. Close mold on parison to check line-up to extrusion head(s).

41. Align mold to extruder, if required.

42. Install new blow pin(s) or blow pin change parts, if required.

43. Reconnect air and water hoses to blowpin, if required.

44. Center blowpin(s) to mold neck opening(s).

45. Install moil stripper insert(s).

46. Adjust vertical position of blowpin(s).

47. Produce bottles.

48. Verify blowpin adjustment and pressure. Readjust if needed.

49. Verify clamp pressure. Adjust if needed.

50. Reinstall gripper arms and bottle grippers.

51. Align first set of grippers to bottle(s) on blowpin(s).

52. Position second set of grippers 15 inches from first set.

53. Reinstall scrap chute and discharge table.

54. Install pneumatic trimmer tooling. (Trim knife and nest).

55. Realign bottle discharge guide brushes.

56. Run bottles to align and adjust pneumatic trimmer. [Optional
IF THE WIDE MOUTH TRIMMER IS NOT USED, SKIP STEPS 57 THROUGH 60

57. Install neck ring in widemouth trimmer/reamer. [Optional]

58. Adjust trim knife to bottle trim groove.

59. Balance counterweight(s).

60. Run bottles to align widemouth trimmer/reamer to bottle.

61. Install and align pneumatic trimmer tooling (knife and nest). [Optional]

62. Fine tune parison programmer profile and weight.

63. Optimize blowmolding cycle.

64. Record all operating parameters on a set-up sheet.