In beverage packaging production, the blow molding machine is a key equipment that determines the quality, production efficiency, and cost control of PET bottles. Whether it’s small bottled water, 5-gallon bottled water, or carbonated beverage bottles, the selection of blow molding machines directly affects the operational efficiency and product quality of the entire production line.
As Jndwater, which serves 125 countries worldwide and has rich experience in whole plant production, this article will systematically analyze the selection points of blow molding machines for you, helping you find the most suitable equipment for your own factory.
Basic types of bottle blow molding machine
| Classification method | feature | Applicable scenarios |
| According to the process flow | Injection molding and blow molding are completed on the same equipment | Small batch, special bottle type |
| Injection molding preform → blow molding machine for blowing | Mainstream choice, high efficiency, stable quality | |
| bottle type | 0.2-2L PET bottle | Bottled water and beverages |
| 18.9L 5-gallon bottle water bucket | Production of bottled water | |
| degree of automation | Manual loading and operation | Small scale, limited budget |
| Automatic loading, automatic blowing, and automatic removal | Mainstream choice, high efficiency, labor-saving | |
| production capacity | 1 mold, 1 cavity | Small scale production |
| 1 mold, 2 cavities | Medium sized production | |
| 1 mold with 4 chambers, 6 chambers, 8 chambers and above | mass production |
What bottle are you going to blow?
| Bottle shape | Bottle weight | Blow bottle pressure | Recommended models |
| 100-500ML | 12-20g | 3.0-3.5 MPa | High speed multi cavity bottle blow molding machine |
| 1.5L medium bottle | 30-50g | 3.0-3.5 MPa | Multi cavity bottle blowing machine |
| 5-gallon bucket | 600-1000g | 3.5-4.0 MPa | Specialized 5-gallon bottle blowing machine |
| carbonated beverage bottle | 20-30g | 3.5-4.0 MPa | High pressure resistant bottle blow molding machine |
| Hot filled bottling | 25-35g | 3.0-3.5 MPa | Heat resistant bottle blowing machine (crystallization bottle mouth) |
Jndwater reminder: 5-gallon barrels and carbonated beverage bottles require higher requirements for the bottle blowing machine, requiring greater mold clamping force, higher blowing pressure, and stronger cooling system, and cannot be simply enlarged with a small bottle machine.
Automation level: fully automatic or semi-automatic pet bottle blow molding machine?
| Comparing dimensions | Semi automatic bottle blowing machine | Fully automatic bottle blowing machine |
| Artificial casting | need | automatic |
| retrieve finished products | manual | automatic |
| number of operators | 2-3 people | 1 person monitoring |
| production efficiency | lower | high |
| Quality stability | Relying on manual labor | Stable and controllable |
| investment cost | low | high |
| applicable | Small batch, initial stage | mass production |
Mold compatibility: Will bottle types be changed in the future?
| compatibility | feature | Applicable scenarios |
| specialized mold | Only blow one bottle type, with the highest efficiency | Single product, large-scale production |
| Quick Die Change | Mold change time<30 minutes | Multiple varieties, small batches |
| Universal mold base | Replace the mold cavity to change the bottle type | Similar bottle shapes but varying sizes |
Selection Decision Checklist
What bottle shape do you want to blow? size? weight
How many bottles/barrels need to be blown per hour?
Do you need a quick mold change? Will there be a change in bottle type in the future?
What is the budget range?
What is the size of the factory space? Are the electricity and gas sources sufficient?
Do we need suppliers to provide full line integration services?
If you are planning to purchase a bottle blow molding machine, please feel free to contact the Jndwater team. We can provide free technical consultation and solution design according to your specific needs, helping you find the most suitable blow molding machine solution.
