How Does PET Bottle Blowing Machine Work?

What is your first requirement in terms of bottle containers? Attractive appearance or portability? In the beverage industry, the familiar bottle containers are plastic bottles, glass bottles, aluminum bottles, cans, etc. PET, PP, PC, PE, and other materials are examples of plastic bottles. PET bottles are the most common in the beverage industry due to their high plasticity, portability, and low cost. In the following article, we will discuss the machine for making PET bottles &#; the bottle blowing machine.

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bottle blowing machine, bottles

Steps for making PET bottles

Generally, there are two ways to make PET bottles, the one-step bottle-making machine, and the two-step bottle-making machine. A one-step bottle-making machine can complete the entire process, from the plastic particles to the final plastic bottle. The one-step bottle blowing machine is primarily used to produce small-size bottles, such as those used in the pharmaceutical and cosmetic industries. Today&#;s main topic is the two-step type bottle blowing machine.

The two-step type bottle blowing machine produces PET bottles in two steps:

Step One: PET plastic particles &#; Injection molding machine &#; PET bottle preforms

PET bottle-preform injection molding machine PET bottle-preform injection molding machine

Step Two: PET bottle preforms &#; PET bottle blowing machine &#; PET bottles

bottle blowing machine, PET bottle making process

PET bottle-preform injection molding machine

PET bottle-preform injection molding machine consists of the main machine and auxiliary machine (crusher, autoloader, hopper dryer, chiller, air compressor). Small and medium-sized beverage manufacturers typically do not purchase the PET bottle-preform injection molding machine, but instead, direct buy ready-made bottle preforms.

The price of PET bottle-preforms 

The weight of each PET bottle-preform determines its price. The bottle-preform price varies slightly depending on the pricing of raw ingredients in each nation.

This year, the Chinese bottle-preform price has risen significantly due to the rising raw material prices. The pricing of the 30/25 type PET water bottle-preform in China is currently usd0./gram, implying that a standard 18gram PET water bottle-preform (500ml water bottle) costs usd0./piece. You can check prices in your area and decide where to buy (don&#;t forget to factor in shipping fees).

PET bottle-preform PET bottle-preform PET bottle-preform

The weight of the PET bottle-preforms

We know that the bottle-preform is a significant material cost for the beverage factory. How can the weight of the bottle preform be reduced without compromising its firmness of the bottles? We can accomplish this by using a short neck bottle and adding more strength lines to the bottles.

bottle neck short bottle neck PET bottle design

Type of bottle blowing machine

The bottle blowing machine can be classified as semi-automatic or fully automated, depending on the level of automation.

We can divide the full-automatic bottle blowing machine into two types based on the driving model: cylinder drive and servo drive.

We can divide the bottle blowing machine into two types: linear type bottle blowing machines and rotary type bottle blowing machines.

Cylinder drive type bottle blowing machine 

The main driver of the blowing machine includes preform taking, stretching, mold clamping, and so on. If the driver models of bottle blowing machines are all cylinder drive types, the speed is about -bottles per hour (based on 500ML).

semi-auto bottle blowing machine bottle blowing machine semi-automatic full-auto bottle blowing machine

Servo drive type bottle blowing machine 

If some or all of the bottle-blowing machine&#;s drivers are servo drive types, the speed will be substantially higher, with a maximum speed of 20,000 bottles per hour (based on 500ML).

servo type bottle blowing machine bottle blowing machine, servo drive type

Rotary type bottle blowing machine

All the above are linear-type bottle blowing machines, the other is the rotary bottle blowing machine. It is mainly applicable to production lines with more than 20,000 bottles per hour. It is usually combined with filling and capping, which is called blowing filling capping combi block.

Remember to consider the maximum bottle size when selecting a bottle-blowing machine.

blowing filling capping combi block rotary type bottle blowing machine

Bottle blowing machine for special bottles

Heat resistant bottle

We know that the filling temperature of some fruit juice is hot filling (usually 85 degrees), so its bottle must have heat resistance, thus we called this kind of bottle blowing machine the heat-resistant bottle blowing machine. The heat-resistant bottle blowing machine&#;s speed is usually half that of a regular bottle blowing machine.

juice bottle bottle blowing machine hot resistant bottle blowing machine

Bottle blowing machine for bottles with handles

Aside from the heat resistance in temperature, there are also some bottles with handles. 5L, 10L, and edible oil bottles, for example.

bottle blowing machine handles bottles bottle blowing machine for bottles with handles handles bottles bottle blowing machine

The bottle blowing machine for the handle bottle has two types: pre-insert type machine and post-insert type machine. The pre-insert type machine is the one-step machine. The post-insert type needs two steps, the bottle blowing machine and the handles-put machine, which is mainly used in the high-speed production lines.

Concerning bottle molds

Bottle mold materials include iron mold (P20) and aluminum mold (aluminum ). Aluminum molds have become popular in recent years because they are light (easy to change molds), and blown bottles are more transparent. Of course, the aluminum mold costs more than the iron mold.

bottle blowing machine molds bottle blowing machine bottle molds

The auxiliary machine of bottle blowing machine

Air compressor

The air compressor has two parts: low pressure and high pressure. Some machines can switch from high to low pressure, eliminating the need for a low-pressure compressor.

bottle blowing machine, high pressure air compressor bottle blowing machine,low pressure air compressor

The air compressor has a piston-type air compressor and an oil-free screw-type air compressor. The oil-free screw-type air compressor is preferable in the food industry (air source cleanliness is higher, less lubricating oil and oil filter and filter consumables, low noise). Atlas of Sweden and Ingersoll Rand of the United States are currently the most well-known air compressor brands.

bottle blowing machine, piston type air compressor bottle blowing machine, oil free screw type air compressor

Three-stage compression is more efficient and produces less noise than two-stage compression in piston-type air compressors.

bottle blowing machine, 2stage air compressor bottle blowing machine, 3stage air comproessor

Air storage tanks

The air storage tank is for storing compressed air.

Cooling dryer and air filters

The primary purpose of the cooling dryer is to dry the compressed air to avoid water lines on the finished bottle.

Grade T (particle size 1m) and Grade A (particle size 0.01) are the two types of air filters based on the size of the filter element.

bottle blowing machine air compressor installation flowchart

Chiller

The chiller has the air-cooling type chiller and the water-cooling type chiller according to the cooling type. The water-cooling type chiller needs to be used with cooling towers. You can select the corresponding chiller according to the actual situation.

bottle blowing machine air chiller bottle blowing machine water chiller bottle blowing machine cooling water tower

Piping

When it comes to air compressors, there is no doubt that the piping, which includes high-pressure steel piping and low-pressure air piping, must be taken into account.

Seamless steel piping for high-pressure compressor system 

bottle blowing machine seamless steel pipes bottle blowing machine high pressure pipes

Air piping for low-pressure compressor system 

bottle blowing machine low pressure pipes bottle blowing machine low pressure pipes

This is all about the plastic bottle blowing machine. I believe that through this article, you already have a general understanding of this machine, if you have any questions, please feel free to contact us. We look forward to talking with you!

Description:

KM-8Y semiautomatic bottle blow molding machine is suitable for producing PET plastic containers and bottles from 100-ml. It is widely used to produce the carbonated bottle ,mineral water,carbonated drink bottle, pesticide bottle oil bottle cosmetics,wide-mouth bottle etc.
&#; Adopting double crank to adjust mould ,heavy locking mould, stable and fast ,Adopt infrared oven to heat the perform ,the perform rotated and heated equally.
&#; The air system has been divided into two parts: pneumatic action part and bottle blow part to meet the different requirements for the action and blow .It can provide sufficient and steady high pressure for blowing large irregular shaped bottles.
&#; The machine is also equipped with muffler and oiling system to lubricate the mechanical part of the machine.
&#; The machine can be operated in the step-by-step mode and the semi-auto mode.
&#; The machine is small with low investment, easy and safe to operate .

Technical Parameter of blow molding machine:

Container

Product material

PET

Volume

0.1L-2L

Theoretical output

-PCS/H

Preform length

15mm-350mm

Preform inner diameter

φ5mm-38mm

Moulding

Max.mould plate Dimension(L x W)

350x380mm

Max.mould thickness

180mm

Clamping force

45KN

Mould opening stroke

160mm

Machine size and weight

Main machine (L x W x H)

160x60x161KM

Main machine weight

500Kg

Heater (L x W x H)

187x63x145KM

Heater weight

250Kg

Power

17.5kw

High pressure air compressor:

Function: Air compressor is the air source for PET stretch blow molding machine, carrying out the process of compressing air from atmosphere to the required pressure

Air compressor

Unit

1.2M3/min 30KG

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Volume

M3

1.2

Pressure

Kg

30

Speed

r/min

850

Power

KW

15

Overall Dimension

mm

**

Weight

kg

620

Air Cooling Drier&#;

Function :Air dryer is to remove the moisture from the compressed air and lower temperature of the compressed air in the heat exchanger.

 

Refrigeration Air Dryer

Unit

2.0M3/min 3.0Mpa

Flow capacity

Nm3/min

2.0

W.P

Mpa

3.0

Inlet Temp.

&#;

&#;80

Dew point

&#;

23

Ambient Temp.

&#;

&#;38

Power supply

V/HZ

220/50

Compressor power

Kw

0.75

Cold Medium

mm

×650×

Weight

Kg

120

Air Filter&#;

Functions: Air filter is to clear up the impurities out of the compressed air, like carbon hydrogen, tiny dust and solid particles.

Refining-Filter

Unit

2.0M3/min 30Kg

Flow Capacity

M3/Min

2

Max. work pressure

Mpa

3.0

Inlet Temp.

&#;

&#;50

Cold Medium

mm

750*350*350

Weight

Kg

20

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