Aluminum foil bag feeding machine double bag detection solution | Magnetic induction double sheet detector solves the problem of aluminum foil bag stacking

·Aluminum foil composite bags have a significantly higher double packaging rate than ordinary PE bags on the bag feeding machine due to the triple superposition of electrostatic adsorption, local vacuum, and low friction coefficient80-120 bags/minuteThe production line,A 1% double package rate means 48-72 defective products per hour

·Magnetic induction dual sheet detector directly detects the thickness difference of aluminum foil metal layer, and the signal difference between single and double bags is close2 timesNo need to change packaging materials, no need to label, non-contact testing

·Aluminum foil bag feeding machine anti double bag solution is no longer just a demand in the food industry——Pharmaceutical, chemical, electronic, new energy, daily chemical, pet foodSix major industries also use aluminum foil packaging bags for filling, all facing the urgent need for double package testing

·By AtomMDSC-900E metal dual detectorFor example: Testing the thickness of aluminum materials0.1-8mmResponse speed200pcs/min、18 monthsQuality assurance, actual verification has been completed on multiple industry production lines

1、 Double packaging pain points of aluminum foil bag feeding machine - a common challenge faced by six major industries

Why are aluminum foil bags particularly prone to double packaging

When aluminum foil composite packaging bags (aluminum foil+PE/PET multi-layer composite structure) are operated on a bag feeding machine, the problem of double packaging is much more serious than that of ordinary transition bags, and the root cause lies in the superposition of three physical characteristics:

Serious electrostatic adsorption.During the process of bag making, transportation, and storage, aluminum foil bags generate a large amount of static charges due to surface friction. When two pieces are stacked, the electrostatic force keeps them firmly attached, making it difficult for only one piece to separate when the suction cup takes out the bag.

Partial vacuum adsorption after lamination.Placed in the bag compartment, the weight of the upper bag presses down on the lower layer, and the aluminum foil layer has good flexibility. The edges and central area between the bags are prone to forming a local vacuum - like two pieces of glass stacked together and difficult to separate.

The bag surface is smooth and the friction coefficient is low.The outer surface of the aluminum foil is smooth, and the sliding friction coefficient between the two aluminum foil bags is small. When the suction cup pulls up one piece, it is easy to drive the adjacent piece together, which is more likely to occur than rough materialsDouble Card DetectionTypical stacking problem in the scene.

1.2 Chain loss caused by double package

Double packaging is not just a waste of one bag, every subsequent process will be dragged down:

· Opening bag failedAfter the double bag enters the bag opening station, the bag opening suction cup cannot correctly open the bag opening and directly jumps over or gets stuck

· Abnormal fillingThe filling nozzle is inserted between two layers of bags, and the material is scattered in the interlayer, resulting in inaccurate weighing and material waste

· Poor heat sealingTwo layers of bag openings are stacked together for heat sealing, but the sealing strength is insufficient, resulting in leakage and virtual sealing, and the entire bag is scrapped

· Equipment card machineDouble the thickness of the double bag, it is easy to get stuck on the guide rail or turntable station, and it should be cleaned at least once after stopping the machine10-15 minutes

· Terminal accidentsMissed products enter the market, consumers receive 'bag in bag', complaints, returns, brand damage

Quick calculation of production line losses:A bag feeding machine has a production capacity of 80-120 bags per minute,1% double package rate=48-72 defective products per hourCalculated at a cost of 5-10 yuan per bag of materials, the daily loss of materials alone can reach thousands of yuan, and the loss of downtime for cleaning is even greater.

1.3 Not only food - six major industries are all using aluminum foil bags for filling

Previously discussed within the industryAluminum foil bag for bag machine anti double bagFocus more on the food industry. However, in reality, all enterprises that use aluminum foil packaging bags for filling and packaging are facing the same urgent need for double package testing:

Food and Beverage

Leisure snacks (spicy sticks, dried tofu, nuts), coffee, milk powder, prepared vegetable food bags, condiments and sauces bags, pet food - high hygiene requirements, the pollution of filling interlayer caused by double packaging directly affects food safety.

Medicine and Health Products

Powder, tablets, capsules, and health product granules - aluminum foil bags are the key to ensuring drug stability by blocking moisture. Double pack filling may cause dosage deviation, triggeringGood Manufacturing Practice (GMP) for Drug ProductionCompliance risk.

Chemical and Pesticide Industry

Fine chemical powders, liquid additives, pesticide formulations - after filling with aluminum foil bags, it is necessary to ensure reliable sealing. The filling nozzle interlayer caused by double packaging poses additional safety risks to corrosive chemical materials.

Electronics and Semiconductors

Anti static aluminum foil bags are used for storage and transportation of IC, PCB boards, and SMT surface mount materials - with extremely high requirements for packaging bag integrity, double packaging may cause the anti-static layer to fail or the loading station to malfunction.

New energy battery materials

Positive and negative electrode materials, electrolyte additives - strict requirements for moisture resistance of aluminum foil bags. The double package inspection of the filling production line directly affects the quality control of incoming material sealing.

Daily chemical and beauty products

Shampoo trial pack, skincare sample, wet wipes - beautifully printed aluminum foil bag+self-supporting bag design enhances shelf display effect. The poor heat sealing and filling deviation caused by double packaging directly affect product quality.

Although the specifications, production line speed, cleanliness requirements, and material characteristics of aluminum foil bags vary from industry to industry, the core requirements for double pack testing are consistent:Utilizing the metallic properties of the aluminum foil layer to achieve non-contact online detection without damaging the packaging bag.

2、 Magnetic induction detection principle - why it can accurately identify aluminum foil double packs

magnetic inductionDual detectorThe working principle directly utilizes the core structural feature of aluminum foil bags - the metal containing aluminum foil layer (usually 6-9 μ m thick), which is conductive.

Detection principle:The detector probe generates an alternating magnetic field, and when the bag containing the aluminum foil layer passes through the detection area, the aluminum foil metal layer generates eddy currents in the magnetic field. The total thickness of aluminum foil for single bag and double bag is different, resulting in different eddy current intensities——The double bag eddy current signal is about twice that of a single bagThe detector determines whether a single bag or a double bag has passed by comparing the real-time signal with the calibration reference value.

This principle is naturally suitable for aluminum foil bag scenarios:

·Aluminum foil layer is a definite metal conductor, with stable and repeatable signals

·The signal difference between single bag and double bag is large (nearly twice), with high discrimination,Magnetic induction dual sheet detectionAccuracy approaching full standard

·Not affected by bag color, printing pattern, transparency

·Non contact detection, does not wear the bag, does not pollute the production line

Comparison with other detection schemes

The core advantages of the magnetic induction solution are:Aluminum foil bag comes with testing conditionsThere is no need to modify the bag, label it, or change the packaging material - the aluminum foil layer of the bag itself is the source of the detection signal.

3、 Detailed explanation of MDSC-900E detection scheme

Based on Atorm that has been validated on the production lineMDSC-900EFor example, explainDouble bag detector for bag machineThe implementation plan.

3.1 System composition and workflow

Bag feeding machine bag compartment → Suction cup bag picking → Magnetic induction double sheet detector → Bag opening station → Filling → Heat sealing → Output

                                            ↑

                                  Detected double bags → signal output → feeding to bag machine PLC

                                  → Automatic bag placement/shutdown/removal

Core components:

· 2 single probesInstalled on the upper and lower sides of the conveyor path after picking up bags for the bag machine, forming a detection area

· Detection controllerProcessing probe signals, real-time determination of single bag/double bag, outputting switch signals to the bag machine PLC

· Shielded connecting wireAnti workshop electromagnetic interference, ensuring stable signal transmission

3.2 Core Technical Parameters of MDSC-900E

3.3 Key points of installation and debugging

Best installation location:After the suction cup takes the bag and before the bag opening station. At this point, the bag has just been sucked out of the bag compartment and is in a folded state. If a double bag is detected, it can be directly placed back and the bag can be retrieved without affecting the subsequent process.

Installation requirements:

·The probe spacing is set according to the thickness of the bag, usually10-30mm

·Aim the probe at the center area where the bag passes, avoiding the folded and sealed positions

·Bag machine speed of 80-120 bags/minute, detector response200pcs/minRhythm matching without pressure

Calibration process:

1. Place a normal aluminum foil bag and learn the reference signal value for a single bag

2. Place two aluminum foil bags and learn the dual bag signal values

3. Place the zero sheet state and set the zero position reference

4. The system automatically calculates the judgment threshold, and the entire learning processComplete within 30 seconds

Adaptation for Type Change:Bags of the same material but different sizes generally do not require recalibration; When switching between different composite structures such as pure aluminum foil and aluminum plated film, recalibration is sufficient; Switching bags from different suppliers, it is recommended to perform calibration confirmation after each switch.

4、 Key points for adaptation of aluminum foil bag filling production lines in six major industries

Regardless of the industry, as long as the packaging bag contains an aluminum foil layer (pure aluminum foil or aluminum plating is acceptable) and uses a bag packaging machine with magnetic inductionDual detection deviceThey can all be directly adapted. The core logic of detection remains unchanged: utilizing the thickness difference of aluminum foil metal layer to achieveSingle and double sheet detectionNo need to change the packaging material or label.

5、 Summary of Program Value

Atonm MDSC-900EMetal dual sheet detector - based on magnetic induction principle, directly identifies the metal layer of aluminum foil and is suitable for various aluminum foil packaging bag filling production lines.

If you need to evaluate the compatibility of aluminum foil bag specifications for your industry, please feel free to contact the technical team.

thirteen billion three hundred and forty-two million eight hundred and fourteen thousand two hundred and ninety-one

Atorm (Guangzhou) Intelligent Technology Co., Ltd. · Guangzhou Science