Controlling Static in Industry

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In-Mould Labeling

robotic arm
robotic armstatic generation for IMLstatic generation for temporary adhesion


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In mould labeling

Method 1 - Direct contact placement into mould

Step 1:

  • Robotic arm picks up labels from a stack using a vacuum.

Step 2:

  • The label is delivered to the tool and the vacuum released upon contact.
  • At the same time voltage is applied from the 7330 static generator to the charge plate, IML contact pad and label for a short time via the 7091 inline resistor.
  • The robotic arm withdraws leaving the label adhered to the inside of the tool cavity.

Essential Information:

  • Crushable IML Contact Pad is always 15mm > in size all round than the metal charge plate.
  • The voltage 7-12kV should be applied for 35-60 milliseconds to the charge plate as contact between the label and tool is made.

7091 Inline resistor (HVHT Cable with 100Meg Ω resistor)

Metal charge plate
Insulated robotic arm so that there is no path to earth
Vacuum Pick-up
Crushable IML Contact Pad

Some carriers on the robotic arms are not flat plates but are cones or cylinders that carry the label into the female tool cavity for cups etc.

Step 1:

  • Air Jets blow label edges around carrier to be pulled in by vacuum ports.

Step 2:

  • The label is delivered to the tool cavity and the vacuum released upon contact.
  • At the same time voltage is applied to the charge plate, IML contact pad and label for a short time.
  • The robotic arm withdraws leaving the label adhered to the inside of the tool cavity.

Air Jet

Vacuum Pick-up

Metal Mandrill

Crushable IML Contact Pad overhangs the mandrill  by approximately 15mm

7091 Inline resistor (HVHT Cable with 100Meg Ω resistor)

Insulated robotic arm so that there is no path to earth

For multi-impression tool an E70-IML-HW is required which is able to charge up to 8 metal charge plates simultaneously

7091—Inline resistor

E70-IML-HW-RT

Method 2 - Label blown into mould

Utilises charging heads to generate static which gives the label a charge and enables it to adhere to the inside of the tool with air assistance.

Step 1:

Robotic arm picks up labels from a stack using a vacuum.

Step 2:

  • The vacuum is released and the heads are activated as the label is blown into the tool.
  • The tool acts as the earth back to the generator—there is no contact made between the carrier arm and the tool.

Essential information:

  • For multiple impression tools the E70-IML-HW-CDH is available with a  maximum of 8 charging heads and 14m cable.
  • The heads are hardwired into the connector box which is fitted with a 100Meg Ω resistor.

Plastic Carrier

7090 Single Point Generators

Vacuum Pick Ups

7090 Single Point Generator

E70-IML-HW-RT

Method 3 - Label blown onto mandrill

For cups and similar the labels can be applied to the male tool (mandrill) rather than into the tool cavity as in method 1.

7090 Single Point Generator

Step 1:

  • Air jets blow the label down and around the mandrill, once in position the label is fixed to the tool by static using 7090 Single Point Generators

Step 2:

  • The mandrill carrying the label is then introduced into the cavity and remains there throughout the injection moulding process

 

 

   

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Shanghai Fraser Static Technology Co., Ltd

Room 301 Building #3

No. 2568 Gudai Road

Shanghai China PR

 

www.fraser-static.cn

Tel: +86 21 5296 7651
Fax: +86 21 5296 7653