Posts Tagged ‘Dairy Containers’

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: Reciprocating Screw (Intermittent Extrusion)

Wednesday, April 7th, 2010

Reciprocating Screw (Intermittent Extrusion)

This is the most popular and cost effective method to produce lightweight dairy, juice and water containers. In this process the extruder feed screw reciprocates similar to an injection molding machine. The molds are stationary under the die head and simply open and close but do not shuttle. As the screw moves forward, the parison is pushed out into the molds for blowing. For lightweight containers, cycle times can be very fast with some under 5 seconds. Major machinery manufactures include Rocheleau and Uniloy.

PROS:

  • Very fast cycle time capabilities
  • Simple machine motions since clamps do not move
  • Capable of 16 cavities small bottles or 8 gallons. Smaller models available
  • Relative low cost per cavity
  • Can easily run homo polymers and very low melt temperatures

CONS:

  • Limited to monolayer applications
  • Primary materials are HDPE and limited amount of PP
  • Difficult to parison program

Back to Blow Molding Process Comparison.






Small Bottle System Now With Dual Parisons

Sunday, April 12th, 2009

NPE 2009 – Booth # S36054

The proven performance of Wilmington Machinery’s SB (Small Bottle) system now features dual parisons, making the system 30-40% more cost effective! Visit Booth S36054 and watch a video of this impressive system producing bottles at Wilmington’s plant in North Carolina. Plus, ask about Wilmington Machinery’s new Series V (Large Bottle) machines with recently updated features designed to help blow molders reduce cost even further. Learn details of some of the successful multi-layer applications for the Series V machine from the Wilmington machinery staff at NPE 2009.

Wilmington Machinery’s latest SB system features a 50 cavity, 6 layer HDPE coextrusion system capable of more than 2000 lbs. per hour and 18,000 bottles per hour depending upon the size. It is supplied with multiple sets of molds, bottle conveying and trimming. This breakthrough in technology for small bottle blow molders is achieved by a combination of proprietary developments in mold design, bottle handling, high speed parison extrusion methods and processing.

Wilmington Machinery, a manufacturer of high speed rotary coextrusion blow molding systems and structural foam injection molding machinery, introduced the SB product line 2 years ago at NPE in Chicago and became an instant success due to the machine’s simple operation, the high quality bottles produced, and overall value to the customer. The SB addresses many processing issues associated with blow container neck to neck or neck to tail on other wheel, shuttle and reciprocating blow equipment. For ultra-light weight or high performance containers, the difference in the tandem bottles from top to bottom cannot be tolerated. Wilmington’s SB single cavity system guarantees every bottle is identical. That means better material distribution, much smaller gram weight variation, better performance in the filling operation and lower cost.

The SB system utilizes Wilmington’s mechanical cam actuated modular clamp design and is sized to match the container size with either a 1 or 1.5 ton model with various mold sizes for different bottles. As with all of Wilmington Machinery wheel systems, SB machines are sized to match production demand with 18 to 60 cavities or more. The wheel speeds are designed to accommodate the estimated cycle time which can be a little as 6 seconds for light weight dairy / juice / yogurt containers.

2009 NPE Wilmington Machinery Booth: # S36054

To set up an appointment at the show contact:
Jeff Newman
Wilmington Machinery
4628 Northchase Parkway NE
Wilmington, NC 28405
910.452.5090 x 104
Email: jnewman@wilmingtonmachinery.com