Posts Tagged ‘Wheels’

SB Rotary Blow Molding Machines

Monday, March 7th, 2011

I have talked with many customers over the last several months about our high speed “SB” Rotary Blow Molding (RBM) systems for small bottles. The applications have been expanding as the process works for any where the parison is contained in the neck. The advantages that they all say we have as compared to other shuttles, recipes and wheels are:

• No complicated takeout systems or bottle knock out devices

• No complicated tooling (shear steels, blow pins, deflashing, etc) to maintain

• High operating efficiencies of the production line

• No complicated hydraulics and greater energy savings

• Much small machine requiring less floor space

• Because of the simplistic design it requires less people

• Much high quality bottles than can be made on other type of machines

Recently I talked with a customer that said our competitor told them the SB process “does not work”, I said “does not work, what do you mean?” the competitor says that your machine produces unblown bottles, the process does not work with no tails and it takes 3 people to run the line”. So I then put him in touch with a customer that has been running our SB system, very successfully, for 4 years. After the conversation he told me “you are right, he loves his machine and says he has less than one operator”. The moral of the story is, don’t believe what you hear from competitors. With the Wilmington’s SB system, things CAN BE too good to be true. It’s simple and better than any other process on the market today, I hope you will call me to find out the truth about the SB RBM systems.

910-431-1003 or email me at: jnewman@wilmingtonmachinery.com

-Jeff






Blow Molding Process Comparison

Wednesday, April 7th, 2010

If you are new to blow molding or if you have been in the industry for 30 years, it can still be confusing as to what type of blow molding machinery or process is best for your next application. I have been fortunate in my career to design and build machinery for every type of blow molding process. For your information I consider there to be 7 primary machinery processes for packaging applications.

Shuttles (Continuous extrusion)
Wheels (Continuous extrusion)
Injection Blow
Injection Stretch Blow (1 Step)
Reheat Stretch Blow (2 Step)
Reciprocating screw (Intermittent extrusion)
Accumulator Head (Intermittent extrusion)

Some people may refer to them differently and some may argue several of these should be grouped together, but for sake of discussion, we will use this grouping. Further definition of the technologies, along with pros and cons for each process, can be found in the links above.

  Shuttle Wheel Injection Blow Injection Stretch (1-Step) Reheat Stretch (2-Step) Recip Screw Accumulater HD
HDPE Yes Yes Yes No No Yes Yes
PP Yes Yes Yes Sometimes No Yes Yes
PET No No Yes Yes Yes No No
PVC Yes Yes Yes No No No No
Styrene No No Yes No No No No
Multilayer / coinjection Yes Yes Difficult Difficult Difficult No Difficult
IML Yes Yes No No No Difficult Difficult
Handleware Yes Yes No No No Yes Yes
Injection Finish Good Fair Excellent Excellent Excellent Fair Good
In-machine Deflashing Yes No N/A N/A N/A No No
Flashless Process No No Yes Yes Yes No No
Small Bottle<100 ml

low/med vol.

Yes No Yes No No No No
Small Bottle<100 ml

high vol.

Yes Maybe Yes No No No No
Med. Bottle(1 litre)

low vol.

Yes No Yes Yes No Yes No
Med. Bottle(1 litre)

high vol.

Yes Yes No No Yes Yes No
Large Bottle(4 litre)

low vol.

Yes Yes No No No Yes No
Large Bottle(4 litre)

low vol.

No Yes No No No Yes No