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Bosch understands time to market is critical.  We constantly strive to reduce our machine lead times to get you up and running as quickly as possible.  Occasionally, we also have stock machines available for quick sale and delivery.  The list below shows machines that are either in stock, or will shortly become available.  For additional machine details or to request a quote please contact your local sales representative using the link below.

Click here to find your local sales representative

All delivery dates are subject to receipt of order, product, film and funds.

Horizontal Flow Wrapper
Machine
Lead Time
(6) Pack 101 (5) available- 1 week after Nov. 1st
(1) available- 2 week
Doboy Stratus 4 weeks
(2) Pack 201 Available Dec.1st
Pack 201 HS, Pack Feeder 4 4 weeks after Nov. 10th
Vertical Form-Fill-Seal
Baggers
Machine
Lead Time
SVE 3800 AB Harsh Available Dec.1st
SVE 2520 AB Welded Frame/ Harsh 6-8 weeks
SVI 2620 6-8 weeks
SVI 2600 CE 6 weeks
SVI 2600 UL (5) available- 6 weeks
(2) SVE 2520 Beckhoff Controls (1) available after Nov. 10th
(1) available after Dec. 1st
Secondary Packaging
Machine
Lead Time
 TSC-090 Rexroth (1) week after Nov. 17th
CCM3100 6 weeks after Nov. 10th
Bag Closing
Machine
Lead Time
CBS-D 1 week after Nov. 10th
B-550 1 week after Nov. 10th

This is the third article in a series of blogs intended to educate users new to flow wrapping as well as to help experienced users looking for a quick reference. It explains the basic calculations used to determine film dimensions to flow wrap a specific product.  (Read the other articles in this series Principle of Operation of a Horizontal Flow Wrapper and Sealing Fundamentals of Horizontal Flow Wrapping)

Cut-off Length (package length)
First of all it is important to determine the correct cut-off length. This is especially critical for registered film that incorporates graphics that need to be centred on each package. The diagram and formula below explain how to calculate this distance.

Cut-off length

Cut-off Length = Product Height divided by 0.86603 + Total Crimper Width + Total Product Length

 

Web Width
Secondly, you must determine the film web width.  Again, one the key inputs for this calculation is the product dimensions. For products with more variable dimensions, such as bakery products, the film width must be increased to allow for bigger variations. This however, creates looser packs with wider finseal areas.

product dimensions

Web Width = 2 x (Product Width + Product Height + Fin Seal Roller Height + 5mm)

The 5mm (o.2″) can be explained by the distance (including the height and thickness of the deckplates) from the product to the fin seal rollers and some extra film to assure good tracking in the fin seal rollers.  Common fin seal roller heights are 6, 9 and 15 mm.  Together with the 5mm of film for tracking purposes, this results in finseal widths of 11, 14 and 20 mm respectively.

Use the formulas mentioned in this blog for a starting point only. Testing on your machine with actual product and film is necessary to determine film sizing and cut off.

More explanation on the basic calculations used to determine the film dimensions and flow wrapper configuration can be found in Bosch’s Guide to Flow Wrapping. Feel free to download it under the “Links and Downloads” section on the Pack 101 flow wrapper webpage on the Bosch Packaging website. This guide contains other sections to assist users in initially setting up their wrapper, changing over to new products, or solving problems common in flow wrapper operation.

Turning on the No Jam feature on your Pack 101 can be done in just three easy steps. The No Jam feature senses when product is in the way of the crimper. It allows the crimper to remain open while a designated number of products pass through before running production again.


Summary:

Step 1: In the HMI, select “Recipe”, then “Crimper”
Step 2: Turn the No Jam feature to “ON”
Step 3: Select the number of “No Jam” cycles

Watch for more tech tips and instructional videos for your Bosch equipment. For questions or technical support, contact us.

This is the second in a series of blog articles intended to educate users new to flow wrapping and serve as a quick reference for experienced users .  It explains the sealing fundamentals of horizontal flow wrapping. This is useful in selecting the general type of packaging material and determining the machine settings that can be adjusted to influence the seal quality. (Read the first article in the series “Principle of Operation of a Horizontal Flow Wrapper“)

Generally speaking, two types of film can be distinguished: (1) heat seal film and (2) cold seal film. The choice of using heat or cold seal film depends on a variety variables, such as:

  • Product characteristics
  • Material costs
  • Required capacity/speed
  • Necessary barriers (Ultraviolet, Oxygen, etc.)
  • Hermetic seal strength or integrity

 Cold seal films consists of a base material (carrier) and a thin layer of glue. The sealing of this type of film is achieved by pressing the two layers of glue together. One of the advantages of this film is that it can be used at higher film speeds than heat seal films.   It also requires no heat to seal, so the lack of hot machine surfaces may be beneficial when dealing with temperature sensitive products, such as chocolate. However, there are some disadvantages.  Primarily that they can never offer the same protection and hermetic seal qualities as heat seal film.  They also need to be stored in a climate controlled room and lastly, the cost is generally higher than that of heat seal film. Therefore this type of film is less common than heat seal film.

Heat seal jaws cutting and sealing packages on a Pack 101 flow wrapper.

Heat seal jaws cut and seal packages on a Pack 101 flow wrapper.

Heat seal films are often multi-layered and consist of an outer coating that prevents the film from melting,  the core of the film such as polypropylene, and a sealant layer on the interior which has a lower melting temperature and bonds to seal the package together.  When high integrity seals are required, heat seal film offers the best alternative.  Generally, it is also less expensive than cold seal films.   Heat seal films are also offered in a wide range of laminations so that barrier properties can be optimized to meet product protection requirements.

The three important factors that should be kept in mind and controlled when producing a seal are:
(1) Heat: Temperature of the sealing surfaces (heat is not necessary with cold seal film)
(2) Dwell: Amount of time the machine jaws are in contact with the sealing material
(3) Pressure: Amount of pressure applied to the sealing material

Whenever a change is made in any one of these factors, one or both of the other two factors must be adjusted to compensate for this change. For example, when machine speed increases significantly, the dwell time will drop, so the temperature (and sometimes pressure) may need to be increased to compensate for this.

More details on optimizing sealing parameters and an overview of  different packaging films and their uses can be found in Bosch’s Guide to Flow Wrapping. It’s available for free download under the “Links and Downloads” section on the Pack 101 flow wrapper webpage on the Bosch Packaging website. This guide contains other sections to assist users in initially setting up their wrapper, changing over to new products, or solving problems common in flow wrapper operation.

This is the first article in a series of blog articles intended to educate users new to flow wrapping as well as to help experienced users looking for a quick reference.   It covers the basic operational principles of horizontal flow wrapping. These principles are the same for every horizontal flow wrapper, often referred to as horizontal form fill and seal (HFFS) machines.

Every wrapper has an infeed conveyor, a film feed assembly (backstand), a film forming area (former), bottom seal (finseal), a cutting head and a discharge area. Food and non-food products created by processing equipment, are placed on the infeed conveyor of the flow wrapper. This can be done by hand feeding or by using an automated feeding solution. As the infeed conveyor delivers product to the forming area, film is drawn from the film feed assembly into the forming area, where a film tube is formed around the product and a finseal is created. The film tube and the product are then delivered to the cutting head. The cutting head creates the end seals while it cuts apart adjoining wrapped products into individual packages, and delivers the packages to the discharge area. From the discharge area, the packages can be either cartoned at a packing station or accumulated for packing at a later time.

Flow Wrapper Principle

 

More details on the basic principles of horizontal flow wrapping can be found in Bosch’s Guide to Flow Wrapping.  Download your copy today under the “Links and Downloads” section on the Pack 101 flow wrapper webpage on the Bosch Packaging website. This guide contains other sections to assist users in initially setting up their wrapper, film selection, changing over to new products, or solving problems common in flow wrapper operation.

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