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Small to Large Preform Mold, Gutewei 10g to 200g PET Tooling, Custom Weight Preform Solution
PET preforms come in every imaginable size — from tiny 10g preforms for 100ml hotel water bottles to massive 200g preforms for 20L water cooler jugs and industrial containers. Each weight demands different mold geometry, cooling characteristics, and injection parameters. That is why Gutewei offers custom weight preform solutions covering the entire spectrum: 10g to 200g PET tooling — all from a single, trusted manufacturer.
One Supplier for Every Preform Weight
| Preform Weight | Typical Bottle Volume | Application | Gutewei Mold Feature |
|---|---|---|---|
| 10g – 15g | 0.1L – 0.33L | Hotel amenities, airline bottles, sample sizes | High cavitation (96–144), compact design |
| 16g – 24g | 0.33L – 1L | Personal water, CSD, juice | Standard cavitation (72–96), balanced cooling |
| 25g – 40g | 1L – 2L | Family size water, CSD, edible oil | Medium cavitation (48–72), reinforced neck |
| 41g – 60g | 2L – 3L | Large CSD, juice, oil | Lower cavitation (32–48), heavy wall design |
| 61g – 100g | 3L – 8L | Table water, bulk oil, chemical | Low cavitation (16–32), extended cooling |
| 101g – 200g | 8L – 20L | Water cooler, industrial container | Single or dual cavity (1–8), maximum durability |
No matter your target preform weight, Gutewei designs a small to large preform mold specifically optimized for that gram range.
What Changes When Preform Weight Changes?
Designing a preform mold for 10g vs. 200g is not simply scaling up. Different weights present different challenges:
1. Wall Thickness and Cooling
| Preform Weight | Wall Thickness | Cooling Challenge | Gutewei Solution |
|---|---|---|---|
| 10g – 20g | 1.5 – 2.5mm | Fast cooling, risk of overcooling | Zoned cooling with flow control |
| 21g – 50g | 2.5 – 4.0mm | Balanced cooling required | Conformal cooling channels |
| 51g – 100g | 4.0 – 6.0mm | Extended cooling needed | High volume circuits, longer cooling time |
| 101g – 200g | 6.0 – 9.0mm | Significant heat removal | Dedicated heavy-duty cooling, pin cooling |
2. Injection Pressure and Clamp Force
| Preform Weight | Injection Pressure | Required Clamp Force | Gutewei Mold Feature |
|---|---|---|---|
| 10g – 20g | Moderate (800–1,200 bar) | 200–400 tons | Standard mold base |
| 21g – 50g | Medium (1,000–1,500 bar) | 400–600 tons | Reinforced plates |
| 51g – 100g | High (1,200–1,800 bar) | 600–1,000 tons | Heavy duty construction |
| 101g – 200g | Very high (1,500–2,000 bar) | 1,000–1,800 tons | Extra heavy duty, FEA-validated |
3. Neck Finish Compatibility
Different preform weights typically pair with different neck finishes:
| Preform Weight | Common Neck Finishes | Application |
|---|---|---|
| 10g – 15g | PCO 1810, 26mm | Small water, hotel bottles |
| 16g – 30g | PCO 1881, ALCO | Standard beverage |
| 31g – 50g | PCO 1881, 38mm, 48mm | Large water, oil, CSD |
| 51g – 200g | 38mm, 48mm, 55mm, 63mm | Water cooler, bulk oil, industrial |
Gutewei Custom Weight Preform Solution: Technical Approach
For Lightweight Preforms (10g – 20g)
Focus: High cavitation, fast cycles, thin wall consistency
| Feature | Specification |
|---|---|
| Recommended cavity count | 72 – 144 cavities |
| Core/cavity material | S136 ESR, HRC 48–52 |
| Cooling type | High turbulence, fast heat removal |
| Cycle time target | 6 – 8 seconds |
| Weight variation target | ≤ 0.25% |
| Best for | High volume water, small CSD |
For Medium Weight Preforms (21g – 50g)
Focus: Balanced cooling, uniform wall distribution
| Feature | Specification |
|---|---|
| Recommended cavity count | 48 – 96 cavities |
| Core/cavity material | S136 ESR, HRC 48–52 |
| Cooling type | Conformal cooling, zoned control |
| Cycle time target | 8 – 11 seconds |
| Weight variation target | ≤ 0.30% |
| Best for | Standard beverage, edible oil |
For Heavy Preforms (51g – 100g)
Focus: Extended cooling, robust construction
| Feature | Specification |
|---|---|
| Recommended cavity count | 16 – 48 cavities |
| Core/cavity material | S136 or 2316, HRC 48–52 |
| Cooling type | High volume circuits, pin cooling in base |
| Cycle time target | 12 – 18 seconds |
| Weight variation target | ≤ 0.35% |
| Best for | Large water, bulk oil, chemical |
For Extra Heavy Preforms (101g – 200g)
Focus: Maximum durability, specialized cooling
| Feature | Specification |
|---|---|
| Recommended cavity count | 1 – 16 cavities |
| Core/cavity material | 2316 or H13, HRC 50–54 |
| Cooling type | Heavy duty pin cooling + conformal |
| Cycle time target | 18 – 30 seconds |
| Weight variation target | ≤ 0.40% |
| Best for | Water cooler, industrial containers |
Custom Weight Preform Solution: Design Process
When you request a custom weight preform solution from Gutewei, we engineer around your exact specifications:
| Parameter | Gutewei Design Input |
|---|---|
| Target preform weight | Exact grams (10g to 200g) |
| Bottle type | Water, CSD, oil, hot fill, custom |
| Neck finish | PCO, ALCO, 38mm, 48mm, 55mm, 63mm, custom |
| Wall thickness profile | Lightweight, standard, heavy duty |
| Production volume | Low, medium, high (determines cavitation) |
| Injection machine | Make, model, tonnage, tie bar spacing |
| PET material | Virgin, rPET, barrier, bio-PET |
Performance Across Preform Weights
| Preform Weight | Typical Cavities | Cycle Time | Output/Hour | Annual Output (24/7) |
|---|---|---|---|---|
| 12g (0.33L water) | 96 | 8.5 sec | 40,658 | 356 million |
| 16g (0.5L water) | 72 | 9.0 sec | 28,800 | 252 million |
| 24g (1L water) | 72 | 9.5 sec | 27,284 | 239 million |
| 38g (1.5L oil) | 48 | 12.0 sec | 14,400 | 126 million |
| 55g (3L water) | 32 | 14.0 sec | 8,229 | 72 million |
| 80g (5L oil) | 16 | 18.0 sec | 3,200 | 28 million |
| 120g (8L water) | 8 | 22.0 sec | 1,309 | 11.5 million |
| 180g (15L water cooler) | 4 | 28.0 sec | 514 | 4.5 million |
Why Global Preform Manufacturers Choose Gutewei
| Buyer Need | Gutewei Solution |
|---|---|
| One supplier for all preform weights | Full range 10g to 200g capability |
| Custom weight not standard | Tailored cavity geometry for exact gram target |
| Small preform high output | 96–144 cavity high speed molds |
| Large preform thick wall | Extended cooling, heavy duty construction |
| Consistent quality across weight range | Weight-specific engineering, not one-size-fits-all |
| Machine compatibility | Custom interface for any injection press |
Real-World Performance: 38g Edible Oil Preform Mold
| Parameter | Generic Mold | Gutewei Custom Weight Mold |
|---|---|---|
| Target preform weight | 38g | 38g |
| Actual weight variation | ±0.9g (2.4%) | ±0.09g (0.24%) |
| Wall thickness variation | ±0.18mm | ±0.04mm |
| Cycle time | 14.5 seconds | 12.0 seconds |
| Annual output (24/7, 48 cavity) | 114M preforms | 126M preforms |
| Blow molding reject rate | 3.2% | 0.8% |
| Annual material saved (waste reduction) | — | 32 metric tons |
Applications Best Suited for Gutewei Custom Weight Preform Molds
| Preform Weight Range | Typical Applications | Gutewei Advantage |
|---|---|---|
| 10g – 15g | Hotel bottles, airline amenities, sample sizes | Ultra-high cavitation (96–144), fastest cycles |
| 16g – 24g | Standard water, CSD, juice | High volume, excellent balance |
| 25g – 40g | Family size beverages, edible oil | Multi-cavity with heavy wall capability |
| 41g – 60g | Large CSD, juice, oil containers | Reinforced cores, extended cooling |
| 61g – 100g | Table water, bulk oil, chemical | Robust construction, long cycle reliability |
| 101g – 200g | Water cooler, industrial containers | Maximum durability, specialized cooling |
Quality Assurance Across All Weights
Every Gutewei small to large preform mold undergoes weight-specific testing:
| Test | 10g–20g | 21g–50g | 51g–100g | 101g–200g |
|---|---|---|---|---|
| Weight variation target | ≤ 0.25% | ≤ 0.30% | ≤ 0.35% | ≤ 0.40% |
| Wall thickness check | 5 positions | 5 positions | 5–7 positions | 7 positions |
| Cooling validation | Thermal imaging | Thermal imaging | Flow + thermal | Flow + thermal |
| Cycle time validation | Yes | Yes | Yes | Yes |
| Neck finish CMM | ±0.02mm | ±0.02mm | ±0.025mm | ±0.03mm |
Ready for a Preform Mold at Your Exact Weight?
Do not settle for a standard weight preform mold that almost meets your needs. Get a small to large preform mold from Gutewei — a custom weight preform solution precisely engineered for your 10g to 200g PET tooling requirements.
Contact Gutewei today with your target preform weight, bottle size, neck finish, and injection machine model. We will design a preform mold that delivers consistent quality at your exact gram specification.
