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Apr 29, 2013

The Proper Size of Aperture for Metal Detectors

In today’s production environment, versatility of equipment is extremely important; your metal detector should be as well!

Fresh or frozen, dry or wet, your product needs to be inspected.

metal detector with divert

How do you get the most out of your metal detector and still maintain good detection levels?

The proper size will make a difference:

  • Size: your smallest and largest product width, length, height
  • Know product flow dimension to determine belt width
  • Know shortest & tallest product height

How to size an aperture of a metal detector:

  • Add 1” (25-mm) on each side of the width of the conveyor belt (clears the side of the conveyor)
  • Add 1” (25-mm) to the tallest a product height (product must clear the aperture opening without being too far away)
  • Add 1” (25-mm) to the bottom of the product (below the product you must allow room for the conveyor belt and conveyor belt bed)

You now have the basic information to size the aperture of a metal detector.

For example, a maximum product height of 4” and belt width of 12”, your best metal detector aperture will be 14” (350mm) wide x 6” (150mm) high.

There are other determining factors that may affect aperture sizing, but armed with this rule of thumb, you are able to open conversations with your metal detector representative!

Download our Metal Detector PDF

Download our Metal Detector PDF

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See our Food Grade Metal Detectors

Apr 12, 2013

Why Use Metal Detectors in a Food or Manufacturing Plant?

It has been a question asked since metal detectors were introduced in the 1950’s and found their way into the food industry.

No company willingly wants metal contaminates in their products, but with today’s high speed automated manufacturing processes, the odds are not in your favor.

metal detector with divert

There are many reasons for using metal detection as part of your production criteria.  A few are listed below:

Reasons food companies use metal detection:

  • Through the manufacturing process, equipment can break or metal flakes chip off that can land in your product
  • Your customer may require metal detection to protect their name and reputation, in other words “Brand protection.” Everyone has seen the newspaper or other media outlets that point out deficiencies in food protection
  • Shows due diligence, a legal term used to describe that a company is doing everything it can do to protect the consumer.

metal detector

Inspection for metal contaminates in the food industry plays an important role in consumer safety and brand protection.

It is highly recommended that metal detection be part of your quality control procedures.

We have taken the time to study the metal detection industry in order to offer you the detection system to best fit your needs!

Download our Metal Detector PDF

Download our Metal Detector PDF

See our Metal Detectors for Food Products.

Mar 24, 2013

Metal Detection Basics

We’ve all heard stories of an unsuspecting person using a product when that person is horrified to discover something that does not belong in that product on an everyday basis, ensuring that your products are safe and free of foreign objects such as metal is no laughing matter.

A hamburger with a sheared off bolt in it or a pizza crust with a screw could cost your company.

An important component in quality programs is doing all that you can to reduce metal contaminants.

metal detector

Metal Detector on a 24-in Conveyor

Here are some guidelines to effective metal detection before requesting a price quote from a supplier:

  1. Decide what types of metal you need to detect.  There are two main categories of metal: ferrous and non-ferrous.  Ferrous metals are derived from iron or contain iron.  Non-ferrous metals are all others.  Take a careful inventory of the types of metal in your operation that could possibly end up in your products.
  2. What sizes of metal contaminants do you need to screen for? You need to be practical and realistic with this question because if you specify too much sensitivity, you will get too many false alarms and vice versa.
  3. Know the operating environment and the product characteristics  The operating environment includes the temperature and whether water, dust, or chemicals could come in contact with your metal detector, as well as possible electrical fields. Additionally, is the product fresh or frozen, packaged or exposed, scanned individually or in a case?  All of these factors will go into the design of a metal detector that will fit your needs the best.
  4. Reject System considerations – Most commonly, a pusher or an air blast is used to divert products where metal has been detected.   However, you could save space by having the conveyor belt stopped and a warning light activated. Additionally, an optional Lockable Collecting Container prevents unauthorized employees from gaining access to rejected product.

We do not manufacture metal detectors.

However, as a company that has been involved in custom manufacturing of material handling and product inspection solutions for many years, we can help you source the right metal detector and integrate it into your plant’s operation!

Mar 22, 2013

Things To Know When Optimizing Metal Detection

Metal detectors are an important piece of machinery in plants dealing with fresh food products because the use of industrial methods in food processing can leave metal particulates in product.

metal detector

Metal Detector on a 24-in side conveyor

Metal detectors are not a one size fits all type of machine, so there are a few things you will want to remember when choosing and installing the appropriate metal detector.

One interesting thing to note is that metal detectors work better with frozen product.

This is due to the difference in the way that ice and water conduct electrical fields (which metal detectors use to sense fragments and particles).

This might suggest that, if you perform a check for metal, it would be more advantageous to install the detector after whatever freezing processes are used, if any.

Metal detectors come in different numbers of frequencies, so you have to pick the correct one.

In a plant with one consistent product flowing through at all times, the best option would be a single frequency detector because that one frequency can be refined to match that individual product.

multiple frequency detector comes in handy in plants with high product variety or in small plants where products come in short, varying runs. These detectors can quickly change frequencies to match the product coming through at the time.

It is always best to put products through one at a time as opposed to sending things like pallets, because a metal detector becomes more accurate as the aperture size decreases.

It would also be very difficult to isolate what product contains the metal, if any do.

For More Information About Our Metal Detectors: Contact Us Today

Remember that a metal detector doesn’t do much by itself.

metal detector with divert

We do our best to make all of the necessities for a metal detecting rig. This includes in-feeds, out-feeds, rejects, and the software and interfacing to make it all run smoothly.

Metal detectors dabble in some fairly complex science, but that doesn’t mean that they are too difficult to install.

Let us make the process of selecting and installing a breeze by calling or emailing us today!

Download our Metal Detector PDF

Download our Metal Detector PDF

See our Metal Detector Options

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