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φ38mm Cap Mould
SINO MOULD specializes in the design and manufacturing of cap moulds, including standard water bottle moulds, and other type of cap solutions.
The φ38mm cap mould is one of the most widely used mould types in the plastic packaging industry, serving beverage, pharmaceutical, food, and industrial applications. At SINO MOULD, we combine advanced hot runner technology, precision multi-cavity engineering, and high-performance cooling systems to produce cap moulds that deliver exceptional quality, fast cycle times, and long service life. This article explores the key quality points, precision machining highlights, and Mouldflow analysis that make our φ38mm cap mould a trusted choice for high-volume production.
Standard φ38mm Cap Mould Details
Below are examples of the most common parameters for φ38mm Cap Moulds.
| Centrifuge Tube Mould Cavity Steel | S136, DIN 1.2316, 718H | Recommended Injection Machine | DKM SV Series Injection Moulding Machine |
|---|---|---|---|
| φ38mm Cap Mould Core Steel | S136, DIN 1.2316, 718H | Plastic Material | PP, PE |
| Mould Base Standard / Steel | P20, 4Cr13 pre-hardened stainless steel, S45C | Ejection System | Stripper plate + ejector pins + unscrewing mechanism |
| Sliders, Inserts, Lifters Steel | High-strength tool steel with surface hardening treatment | Injection Process | High-speed injection, short cycle time, precise temperature control |
| Number of Cavities | 8, 16, 32, 48, 64, 72, 96, 128 cavities (customizable) | Injection Cycle Time | 4 – 10 seconds |
| Hot Runner System | Valve-gated hot runner / open hot runne | Mould Manufacturing Lead Time | 40–65 days |
Key Quality Points of φ38mm Cap Mould
- High concentricity between core and cavity ensures consistent cap wall thickness and thread precision, preventing leakage and ensuring proper sealing performance .
- Balanced multi-cavity design (available from 8 to 128 cavities) guarantees uniform weight and dimensions across all caps, eliminating quality variations between batches .
- Beryllium copper alloy (Mouldmax) applied on core and critical cooling areas achieves excellent heat dissipation, enabling cycle times as low as 4–10 seconds in high-speed production .
- Precision venting and hot runner temperature control systems prevent defects such as stringing, black spots, and short shots during high-speed injection .
Precision Machining Highlights for φ38mm Cap Moulds
- Advanced CNC high-speed machining centres achieve critical dimensional tolerances controlled to ±0.01 mm, ensuring precise thread profiles and cap fitment .
- Multi-stage inspection processes, including concentricity, bore diameter, thread accuracy, and surface finish, guarantee high-quality cap moulds .
- Mirror polishing on cavity surfaces ensures smooth, flawless cap appearance and facilitates easy part release .
- Wear-resistant slides and ejection systems (stripper plate + ejector pins + unscrewing mechanism) ensure stable, durable operation under high-frequency production .
