How to Install Plate-Side Date Marks Step-by-Step
Key Takeaway: Plate-side installation requires 4 steps: prepare the pocket (H7 tolerance), insert the spacer ring, seat the pin set from the ejector side, and verify flush height with a depth micrometer. Total time: 5–10 minutes.
Before You Start
- Verify pocket diameter tolerance: H7 (e.g., Ø10 +0.015/0 mm).
- Confirm pocket depth matches the pin set installed height + outer ring thickness.
- Clean the pocket with solvent to remove resin deposits.
- Have the correct removal tool ready (DTPPN or DTNK).
Installation Steps
- Step 1: Remove existing pin set — Use the removal tool (DTPPN plunger or DTNK hook) to extract the old pin set. Do not pry with screwdrivers — pocket damage is permanent.
- Step 2: Inspect and clean — Check pocket walls for wear or resin buildup. Clean with brass brush and solvent. Verify diameter with gauge pin.
- Step 3: Insert new pin set — Align the pin set with the pocket axis. Push in by hand until seated. The fit should be light interference (0.005–0.010 mm).
- Step 4: Seat the outer ring — If removed, press the outer ring (standard or beveled) into the counterbore until flush.
- Step 5: Set the date — Rotate the month arrow to the current month position.
- Step 6: Verify flush height — Use a depth micrometer to confirm the pin face is 0.00–0.02 mm below the cavity surface. If the pin protrudes, it will create a witness mark on the part.
Common Installation Errors
| Error | Consequence | Prevention |
|---|---|---|
| Pin inserted upside down | No date mark on part; pin may jam | Check character orientation before insertion |
| Pocket not cleaned | Pin sits high → witness mark on part | Always clean before installing new pin |
| Wrong removal tool used | Pocket wall damage → loose fit on future pins | Match tool to pin type; see compatibility chart |
For general mold maintenance standards, see ISO quality management guidelines.
Pocket tolerance specifications follow injection moulding dimensional standards.