Solutions for PET bottle blow molding problems, Part six

Solutions for PET bottle blow molding problems, Part six

26, PET bottles are too soft
A, Causes:
   1, Bottle design is not good
   2, Heating temperature is too high

B, Solutions:
   1, Improve and change the bottle design 
   2, Bottles are better to be made by lower heating temperature. That we call “just right” temperature.

27, PET bottles smell like burnt
A, Causes:
   1, Heating temperature is too high
   2, Air quality from the air compressor is not good.
   3, Bad-quality PET preforms

B, Solutions:
   1, Reduce the heating temperature in the heating tunnel. 
   2, Check and clean the air compressors, the air filters, and air cold dryer. Make sure they are all clean and working well functionally. 
   3, Get good quality PET preforms. Different price, different quality, do not always buy the cheapest preforms. 

28, Bottled water go bad with bad smell after a short time. 
A, Causes:
   1, Too much ethanal in the bottle material 
   3, PET preforms not good quality

B, Solutions:
   1, Both PET preforms and bottles are better be made under lower temperature.
   2, Check the PET granules supplier, which must be with good quality. Get a good supplier.

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=201

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp/WeChat/Mobile: 0086 137 28668423

Solutions for PET bottle blow molding problems, Part five.

Solutions for PET bottle blow molding problems, Part five.

24, PET bottles are easy to be broken by dropping

A, Causes:

   1, Bottle bottom is not stretched properly

   2, PET material damaged in high temperature

B, Solutions:

   1, Change the stretch ratio for the blow molding

   2, Make sure the PET granules are dried enough before injection

   3, Reduce the heating temperature on the injection molding process, or blow molding process

25, Spot or fog inside the PET bottles.

A, Causes:

   1, Dirty air get into the blowing cylinder

   2, High humidity inside the air

B, Solutions:

   1, Check the air filters. If the filters are damaged, try get new filters

   2, Check the air cold dryer, make sure the air is dried enough before getting into the blow molding machine

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=200

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423

Solutions for PET bottle blow molding problems, Part four.

Solutions for PET bottle blow molding problems, Part four.

22, Some part with white/milky color on the bottle surface after blowing

A, Causes:

   1, Heating temperature for the white color part is too high

   2, Stretch ratio is too big

   3, Water inside the compressed air

B, Solutions:

   1, Reduce the heating temperature for the white color part on the heating oven

   2, Get good quality preforms

   3, Make the stretch rod to a little slower

   4, replace the oil filter

23, PET bottle is not strong enough

A, Causes:

   1, Thickness of the bottles are not even

   2, Heating temperature is too high for the whole body

   3, Bottle design is not good

B, Solutions:

   1, Fix the injection molds for the PET preforms

   2, Get good quality preforms

   3, Fix the heating tunnel, make sure all heating lamps are in the right position

   4, Reduce the heating temperature for the thickness-not-even part

   5, Increase the molds air extraction

   6, Better to make the bottle by low temperature and high compressor

   7, Re-design the bottles

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=199

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423

Solutions for PET bottle blow molding problems, Part three.

Solutions for PET bottle blow molding problems, Part three.

20, PET bottles’ thickness is not even

A, Causes:

   1, The preforms core is not straight

   2, Heating temperature is not even for all parts on the preform

   3, Air extraction on the molds is not good

B, Solutions:

   1, Fix the injection molds for the PET preforms

   2, Get good quality preforms

   3, Fix the heating tunnel, make sure all heating lamps are in the right position

   4, Reduce the heating temperature for the thickness-not-even part

   5, Increase the molds air extraction

21, PET bottles’ bottom volcano shape

A, Causes:

   1, The heating temperature for the bottom part is too low

   2, The heating temperature for the other parts is too high

B, Solutions:

   1, Make the blowing time to be a little earlier

   2, Increase the heating temperature for the bottom part

   3, Reduce the heating temperature for the other parts of the preform.

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=198

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423

Solutions for PET bottle blow molding problems, Part 2.

Solutions for PET bottle blow molding problems, Part 2.

19, PET bottles are not fully /completely blown in the vertical direction

A, Causes:

   1, The temperature for the not-full part is too high

   2, Preforms cold spot on the not-full part

   3, Air pressure is not enough

   4, Air quantity is not enough

   5, Air extraction of the mold is not good

   6, Mold temperature is too high

   7, Preform is too thin

   8, Stretch ratio of the preform is not enough

B, Solutions:

   1, Reduce the temperature for the not-full part

   2, Do not touch the heated preforms body, incase the temperature drop by hand touching

   3, Increase the air pressure

   4, Increase the air quantity

   5, Increase the air extraction

   6, Use cooling water for the mold

   7, Fix the preforms mold

   8, Increase the stretch ratio in the vertical way.

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=197

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423

Problems & solutions of PET bottle molding process, Part 1.

Problems & solutions of PET bottle molding process, Part 1.

18, PET bottles are not straight with the central core

A, Causes:

   1, Too-early air supply

   2, Too high air pressure

   3, The stretch rod is not straight with the mold bottom

   4, Preforms quality problem

   5, Stretch rod is too slow on going down

   6, Stretch rod is too high from the mold bottom

   7, Temperature for the bottom part is too high.

B, Solutions:

   1, Slow down the delay-blow time

   2, Reduce the air pressure

   3, Fix the stretch rod position, around 1-1.5 cm to the bottom.

   4, Get good quality preforms

   5, Adjust the pressure on the stretch cylinder

   6, Reduce the temperature for the bottom part of the bottles

   7, Fix the stretch rod to be in the center.

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=196

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423

Hand-use inkjet printer

Hand-use inkjet printer

Very economical and useful device

It takes use of the ink cartridge, such as HP printers

Here are the basic parameters

Name	Hand-use inkjet printer	Machine weight	1kgs
Screen size	4.3”	Memory	In-body
I/O	Power charge terminal USB terminal Photosensor terminal	Precision	600DPI
Ink cartridge	70ml	Code	Bar code, and QR code
Print distance	2-5cm away	Working temperature	0-40 degrees
Print speed	30-50M/M	Machine size	25*13*13cm
Print content	Date, English, Barcode QR code	Print height	2-12cm Adjustable
Target material	Wood, cartons, rocks, fiber plat, steel, pipes, tubes, metal, plastic, alum ETC

http://www.sinobema.com/Hand-useInkjet-printer

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423

Problems & solutions of PET preforms injection process, Part 7

Problems & solutions of PET preforms injection process, Part 7.

 

16, White or milky color on preforms after adjusting the temperature

A, Causes:

   1, The temperature is too low or too high

B, Solutions:

   1, Change the temperature to a right parameter

   2, Increase the temperature

   3, Make sure the internal and external of the preforms the same

17, Holes on preforms end/bottom

A, Causes:

   1, Temperature for the end/bottom part is too high

   2, Temperature for the preforms body is too low

   3, Raw plastic granules are not good quality

B, Solutions:

   1, Adjust the temperature for the preforms

   2, Get good quality PET granules

   3, Increase the dryer, make sure the PET granules are dried enough.

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=193

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423

Semi-automatic stretch blow molding machine.

Semi-automatic stretch blow molding machine.
Model 1: 200ml to 2000ml.
Model 2: 200ml to 5-liter
Model 3: 6-liter to 20-liter

Contact us for more details and more models for different bottles. 
Email: sinobema@gmail.com
WhatsApp/Wechat/Mobile: 0086 137 2866 8423
www.sinobema.com
http://www.sinobema.com/Bottle-blow-molding-machinery

Common problems and solutions for PET preforms injection molding machine, Part 6

Common problems and solutions for PET preforms injection molding machine, Part 6.

13, Bent preforms after getting out of the injection mold.

A, Causes:

   1, Injection hole is not straight, not in the center.

   2, Cooling is not even.

B, Solutions:

   1, Fix the molds.

   2, Reduce the holding pressure

   3, Increase the injection speed

   4, Increase the cooling time

   5, Clean the cooling water tunnel

   6, Increase the pressure and quantity of the cooling water

14, Bent preforms after temperature increasing.

A, Causes:

   1, Preforms core is not straight, not in the middle

   2, Temperature-adjusting hole is not in the core center

   3, Preforms’ density is not even

B, Solutions:

   1, Fix the injection molds

   2, Fix the temperature adjusting parts

   3, Reduce the injection temperature, especially for the bent part of the preforms.

15, White preforms after temperature adjusting

A, Causes:

   1, The temperature for the white part is too high

B, Solutions:

   1, Fix the temperature. Around 80-110 degrees for PET preforms. 

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=191

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423

Semi-automatic stretch blow molding machine. 6 liters to 20 liters model

Common problems and solutions for PET preforms injection molding machine, Part 5

Common problems and solutions for PET preforms injection molding machine, Part 5.

11, Dented and sunken surface on the preforms.

A, Causes:

   1, Granules temperature is too high

   2, Injection time is too short

   3, Pressure holding time is too short

   4, Injection shot time is too short

   5, Cooling time is not enough

B, Solutions:

   1, Reduce the raw granules temperature

   2, Reduce the injection speed

   3, Increase the pressure-holding time

   4, Increase the injection shot time

   5, Increase the cooling water

12, Plastic thread on the preform injection inlet hole place.

A, Causes:

   1, Hot isolation is not working well

   2, Cooling is not enough

   3, Pressure exist inside the hot runners

   4, Check-valve function on the injection screw is not working well

   5, Holding pressure is too low

B, Solutions:

   1, Fix the injection holes hot-isolation function

   2, Increase the cooling

   3, Extract the pressure inside the hot runners

   4, Clean the injection screw nozzles

   5, Increase the holding pressure 

http://www.sinobema.com/Difference-between-bottles-of-pure-water?article_id=189

From Sino Beverage Machinery Co., Ltd China
施诺机械设备有限公司中国
sinobema@gmail.com
www.sinobema.com 

www.sinobeveragemachinery.com
WhatsApp: 0086 137 28668423