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Compression Mold
Compression molds for high-speed plastic closure production on SACMI CCM continuous compression molding machines. Each cavity is dosed with an exact-weight pellet of melted resin and formed under high pressure, so the lower processing temperature allows faster cooling, shorter cycles and lower energy use than conventional injection. Suitable for beverage, edible oil, condiment and cosmetic closures.
- Machine platform: Built for SACMI CCM compression molding lines; replacement tooling can be made from customers' existing parts.
- Process advantage: Lower extrusion temperature shortens cooling time, raising output and reducing energy consumption per cap.
- Cap types: One-piece and two-piece closures, including tamper-evident band and EU tethered cap designs.
- Neck finishes: 26mm, 28mm, 2925, 3025, 38mm and custom specifications.
- Tooling components: Punches, dies, cores, cooling inserts and wear parts machined and inspected in-house.
Quotes and technical questions are handled directly by the manufacturer's international sales department.
Compression mold replacement tooling for SACMI CCM cap production lines: punches, dies, cores, cooling inserts and wear parts
Replacement compression tooling refers to the punches, dies, cores, cooling inserts and wear parts that are remade to the same dimensions as the originals so that a SACMI CCM continuous compression molding line can keep running after its tooling wears. This page is a practical reference for maintenance and purchasing teams: which parts wear and how to recognise it, how to send existing parts to LIHE so they can be reproduced, how replacement parts are inspected and how to maintain tooling between replacements. LIHE Precision (Foshan Lihe Precision Machinery Co.,Ltd.) is a manufacturer of PET preform molds, blow molds, closure and compression molds, hot runner systems and mold components for the beverage and packaging industry, with manufacturing in Foshan, China.
Why compression tooling needs replacement
A CCM machine carries many identical tooling stations on its carousel, and every station closes once per revolution. Over millions of cycles the forming surfaces, sealing edges and contact faces wear. Because all stations must produce the same cap, one worn station can cause rejects even when the rest of the carousel is in good condition.
- Typical triggers: cap dimensions drifting out of tolerance, flash at the band or top panel, sticking during extraction, or cooling water leaks.
- Replacing a few stations at a time keeps the line running; replacing the whole carousel set is usually planned with a cap design change or neck conversion.
- LIHE makes replacement tooling from customers' existing parts, so the new parts match the machine and the current cap without a full redesign.
- LIHE tooling is built to withstand up to 8 million shots on Husky, SACMI and Netstal platforms.
Compression tooling parts: what wears and what to look for
| Part | Where wear appears | Typical symptom on the cap or line | Usual action |
|---|---|---|---|
| Punch | Forming surface, thread area, sealing features | Thread or seal dimensions out of tolerance, cap sticking on the punch | Replace or remake from the existing part |
| Die (cavity) | Top panel surface, entry edge | Surface marks on the top panel, flash at the parting area | Polish if minor; replace if dimensions are lost |
| Core | Thread and band forming edges | Weak or uneven tamper-evident band, poor thread form | Replace as a set with matching parts |
| Cooling inserts | Water passages, seal faces | Uneven cap dimensions between stations, water leaks | Clean passages; replace inserts and seals |
| Wear parts (sleeves, seals, contact parts) | Sliding and sealing faces | Misalignment, leaks, irregular extraction | Replace at planned intervals |
How to send existing parts for replacement tooling
- Step 1: Identify the machine: SACMI CCM model, number of molds on the carousel and any modifications made to the tooling.
- Step 2: Select reference parts: send one complete, representative station set (punch, die, core, cooling insert) in the best available condition, plus a worn part if you want the wear pattern assessed.
- Step 3: Add the cap information: cap drawing or samples, neck finish (26mm, 28mm, 2925, 3025, 38mm or custom), cap weight and band type, including EU tethered designs.
- Step 4: Include any drawings or previous inspection reports you hold, and note which dimensions have caused problems in production.
- Step 5: Clean and protect the parts: remove resin residue, dry the water passages, apply rust protection and pack each part separately so forming surfaces cannot touch.
- Step 6: State the quantity needed: number of complete stations, individual parts and spare stock.
- Step 7: Agree the inspection reports and the line trial before production of the full quantity starts.
Inspection of replacement compression tooling
A replacement part is only useful if it is interchangeable with the parts already on the carousel. LIHE checks this with in-house measuring equipment and compares new parts against the customer's reference parts and drawings.
- Zeiss CMM: dimensional measurement of punches, dies and cores against the reference part and drawing; validation and inspection reports are supplied on request.
- 3D profile scanner and optical projector: checking of profiles such as thread and band forming edges.
- Process capability: LIHE tooling consistently achieves CPK ≥ 1.33.
- Cap trial: caps from the new stations are compared with caps from existing stations for weight, dimensions and band function.
Maintenance steps between tooling replacements
- Step 1: Record cycles and rejects per station so that worn stations are identified before they affect the whole lot.
- Step 2: At each planned stop, clean resin residue from punches, dies and cores with non-abrasive methods that do not damage polished surfaces.
- Step 3: Check cooling water flow per station and descale or flush passages where flow has dropped.
- Step 4: Inspect seals and wear parts and replace any that show leaks, cuts or deformation.
- Step 5: Check forming edges at the thread, seal and band for damage, and measure critical dimensions on sample caps.
- Step 6: Protect removed parts against corrosion and store them in individual packaging, labelled by station.
- Step 7: Reorder spare parts early: cap mold parts have a lead time of about 4 weeks.
Spare parts planning for SACMI CCM lines
- Keep complete spare station sets so that a worn station can be swapped as one unit and checked off-line.
- Keep a separate stock of seals and small wear parts, which are replaced more often than forming parts.
- Size the spare stock to cover at least the 4-week lead time for cap mold parts, plus transport time.
- When a cap design changes, plan the replacement tooling and the change of spare stock together.
- Remote troubleshooting, on-site assistance, spare parts supply and mold refurbishment programs are available from the LIHE technical team.
Frequently asked questions
- Can LIHE make replacement tooling from my existing parts?
- Yes. LIHE makes replacement compression tooling from customers' existing parts. Send a representative set of parts and cap samples, and add any drawings you hold.
- Will the replacement parts be interchangeable with my existing stations?
- That is the purpose of measuring against your reference parts. New parts are checked on a Zeiss CMM and in a cap trial against caps from your existing stations; inspection reports are supplied on request.
- How long does replacement tooling take?
- Cap mold parts have a lead time of about 4 weeks. Larger scopes, such as a full carousel set or a neck conversion, are scheduled after the parts and cap information have been reviewed.
- Can replacement tooling be used to change the cap design?
- Yes, a replacement set can include design changes such as a different neck finish, a tamper-evident band change or an EU tethered cap. Describe the change when sending the parts so it is included in the design.
- Which parts should I replace first?
- Start with the stations that produce rejects. Seals and small wear parts are usually replaced most often; punches, dies and cores are replaced when cap dimensions or band function can no longer be held.