1. Basic Mould Information
| Item |
Specification |
| Mould Name |
Long Body PET Bottle Preform Injection Mould |
| Matching Product |
Long cylindrical PET preform (as shown in picture, long straight tube body + threaded neck) |
| Mould Structure |
Two-Plate Hot Runner PET Special Mould |
| Optional Cavity Layout |
8 / 16 / 24 / 32 cavities (customizable) |
| Applicable Machine |
260T ~ 420T PET dedicated horizontal injection molding machine |
| Mould Service Life |
800,000 ~ 1,200,000 shots |
| Mould Base Standard |
LKM / HASCO / DME, all standard parts adopt HASCO brand |
| Runner System |
Balanced hot runner manifold (cold runner optional for small batch trial) |
| Cooling Mode |
Independent spiral conformal cooling circuit for each cavity & core |
| Ejection Structure |
Full long sleeve balanced ejection system |
| Surface Standard |
Cavity inner mirror polish Ra ≤0.02μm |
2. Mould Steel Grade & Processing Standard
|
Component
|
Material Grade
|
Hardness (HRC)
|
Post Treatment
|
|
Cavity Inserts
|
S136H / STAVAX Stainless Steel
|
42–48
|
Nitriding anti-rust + mirror polishing
|
|
Long Core Pins
|
S136H / STAVAX
|
42–48
|
Mirror polishing, straightness correction
|
|
Thread Forming Ring
|
S136H
|
40–45
|
Precision thread engraving + fine polish
|
|
Mould Base Frame
|
718H Pre-hardened Steel
|
28–32
|
Thickened high-rigidity frame, precision grinding
|
|
Guide Pillar & Bush
|
SUJ2 Bearing Steel
|
58–62
|
Hard chrome plating, high precision grinding
|
|
Ejector Sleeve
|
SKD61
|
48–52
|
Vacuum heat treatment, wear resistance enhancement
|
3. Raw Material & Compliance Standard
| Material Type |
Performance Advantage |
Global Certifications |
| Virgin Bottle Grade PET |
High transparency, stable blow molding performance, food safety |
FDA, NSF, RoHS, REACH food packaging standard |
| Opaque White PET (with masterbatch) |
Uniform milky white coverage, light shielding function |
Same food safety compliance as transparent PET |
| Modified Anti-UV PET |
Anti-oxidation, suitable for outdoor liquid packaging |
Reach environmental regulation |
4. Precision Quality Control Tolerance
| Inspection Item |
Allowable Tolerance |
| Single preform total weight deviation |
≤ ±0.02g |
| Long body wall thickness uniformity |
±0.03mm |
| Neck thread outer diameter tolerance |
±0.01mm |
| Long core straightness error |
≤0.008mm, avoid body bending |
| Cavity surface roughness |
Ra ≤0.02μm, no haze, flow lines, silver streaks |
| Cavity-to-cavity weight difference |
≤0.005g |
| Mould base parallelism & flatness |
≤0.01mm |
5. Cooling & Ejection System Details
5.1 Independent Spiral Conformal Cooling System
- Layout: Full surrounding spiral water channels wrapped around the entire long cavity and core pin
- Channel Diameter: φ8–φ12mm
- Cooling Medium: Constant temperature circulating cooling water (10–40℃ adjustable mold temperature controller)
- Core Advantage: Solve long preform body warpage, shrinkage and PET crystallization white fog problems; shorten production cycle by 25%–35%
5.2 Full Long Sleeve Balanced Ejection System
- Structure: Integrated long sleeve ejector fully wraps the preform body, matched with long core pins
- Synchronous multi-group ejection balance design, effectively prevent slender preform bending, thread scratch and product sticking
- Equipped with ejector limit switch to avoid over-travel damage to core pins
6. Core Mould Design Highlights
Special optimized spiral cooling for long cylindrical preform, eliminate long body warpage and crystallization defects
Detachable independent cavity inserts, single cavity can be replaced separately to reduce maintenance cost and production downtime
Symmetrical balanced hot runner manifold, equal melt flow distance for all cavities, consistent weight of each long preform
Integrated precision multi-start thread forming ring, guarantee leak-free cap matching after blow molding
Thickened high-rigidity mould base, resist high PET injection pressure for 24-hour continuous mass production
All PET contact steel is food-grade anti-rust stainless steel, fully meet global food & cosmetic packaging safety standards
7. Production Lead Time Schedule
| Process Stage |
Standard Working Days |
| DFM PET crystallization & long body warpage analysis + 3D mould design |
8–11 days |
| CNC / Wire EDM / Sinker EDM precision machining |
20–30 days |
| Mirror polishing & thread engraving for long cavity inserts |
7–10 days |
| Mould assembly, fitting & straightness correction for long cores |
4–6 days |
| On-machine mould trial & preform weight/thickness/bending inspection |
4–8 days |
| Total Standard Lead Time |
33–45 days |
8. Packaging & Shipment Specification
| Packaging Layer |
Details |
| Inner Protection |
Anti-rust oil + PE anti-rust film + EPE foam full wrapping for long cavity & core inserts |
| Outer Export Package |
Fumigated plywood wooden case with steel fixing pallet |
| Customization |
Custom shipping mark, customer logo printing available |
| Transport Mode |
Sea freight / Air freight (negotiable based on client demand) |
9. Full One-Stop Service Scope
Pre-sales: Free DFM professional PET preform manufacturability analysis, detailed quotation & 3D draft design
Design stage: Output complete 3D assembly files, 2D engineering drawings, full BOM list, processing & polishing process sheet
Production stage: Weekly machining progress photos + intermediate inspection report feedback
Mould trial service: Free long preform samples delivery, full CMM dimensional & weight inspection report
Post-production support: Mass injection technical guidance, blow molding matching test support
After-sales: Lifetime remote technical guidance, spare parts supply, overseas maintenance support
