The Double Chamber Plugging Machine is designed for the via hole filling process with conductive and non-conductive paste. To avoid any air bubbles inside the plugged hole, the filling process is designed in a special manner. The plugging paste is forced by controlled pressure which allows the paste flow to be even. The paste is stored in a special container which can hold up to ¾ gallon, (approx. 4.5 kg non-conductive paste in each plugging chamber). A frequency controlled motor drives the plunger to provide adequate pressure on the paste for even distribution on any type of boards, including very high aspect ratio boards. The operator can work on two different stations at the same time using two different programs. The inner covering is made from stainless steel in order to ensure an easy clean up.

Function:

After the PCB is securely clamped in the filling position, you can start the filling cycle by pushing the start button. The manual doors can be closed during this time. The front doors are controlled by a safety light bar system. The back doors must be closed during all working cycles. The process begins by the filling and cleaning squeegees move to the top of the board. The squeegee then starts to move down the board, filling the holes. The speed of the squeegee’s movement can be controlled and changed during the process. The plugging cycle ends on a specified set point or at the end of the panel. By the end of this cycle, the operator can decide to run the cycle again, if needed.

The Double Chamber Plugging Machine gives you the capability to run two cycles side by side absolutely independent, or run a filling cycle in the first chamber and a cleaning cycle in the second chamber. Past experience has shown that some panel types may need to be run through a cleaning cycle with the squeegees on both sides after the filling cycle in order to avoid excessive sanding work after the baking process.

Advantages:

• Using controlled paste pressure and flow rates for the filling process
• A paste container with a volume of ¾ gallons give you a longer processing time between the refills
• The refill of the paste container works absolutely clean and air bubble free
• Using the force from motor driven plungers for pushing the paste in and through high aspect ratio holes
• A variety of different size paste containers are available for storage of different types of paste
• User friendly programming with programmable parameters for speed, vacuum and plugging area
• The machine is designed for vertical operation in order to save floor space
• The combination of two independent working chambers in one machine allows the operator to work with 2 PCB’s at the same time, using two different programs.
• The squeegee systems are made from anodized aluminum and tension free adapters to hold squeegees in place. The placement is easy to reach and designed for fast changes.

Function:

The panel is held in a fixed position by a vacuum table, which protects the panel from moving during the operation of the process. The unit is protected on three sides and overhead by glass walls. Only the front working area of the unit is open to the operator. The machine is constructed of tubular steel.

The grinder moves uniformly over the board so that the complete surface is ground easily and uniformly. The dust generated from the sanding unit must be removed by an external vacuum, which is provided by the customer. A frequency converter controls the revolution speed of the unit so that fine adjustment of the sanding unit can be accomplished. Pressure for the unit is also controlled by the operator settings. This unit eliminates the problems of over sanding in a specific area.

Uniform finish with fine surface roughness. Superior sanding is achieved through sanding pressure controlled rotation and oscillation head motion.

Main Applications:

• Sanding after hole plugging
• Deburring and dressing after through-hole drilling (thick panels)
• Dressing after plating
• Dressing BGA
• Dressing built-up PBC
• Dressing and cleaning stainless steel press plates
• Dressing multilayers

Main Structure Elements:

• Steel welded frame
• Stepper motors for dual axis
• Vacuum table, made of hardwood (Maple)
• Control unit
• Vacuum Sander
• Filter boxes
• Ball bearing guides and grinding pressure adjustment
• Vacuum unit
• Thickness sensor for copper
• Glass cover

Function:

The paste is stored inside this tool and is pressed through the holes of the PCB’s with compressed air, which is controlled by a foot switch. You simply control the compressed air as you slowly fill the holes. This is a “one step” process and there is no risk of getting air bubbles inside the holes. When you are finished, the Power Squeegee PS200 is stored according to the manufacture’s recommendation.

Some of the recommended types of paste:

• DuPont, CB100 – Conductive Silver Paste
• Tatsuta, AE1190 – Conductive Copper Paste
• Peters, PP2795 – Non Conductive Epoxy Paste
• San-EI, PHP900 – Non Conductive Epoxy Paste
• Taiyo, THP100DXI – Non Conductive Epoxy Paste

Advantages:

• No clean up or change from the paste to storage containers
• Using up to 75 lbs. of pressure to push the paste through very high aspect ratio boards
• No direct contact between the compressed air and the paste

Manufacturer:

ITC Intercircuit Production GmbH
Innere Gewerbestraße 8
D-09235 Burkhardtsdorf
OT Meinersdorf
Phone:49/03721/3992-0
www.itc-intercircuit.de

In the USA Contact:

ITC Intercircuit
21625 Grenada Avenue
Lakeville, Minnesota 55044
Phone: 952-469-2310
Fax: 952-469-2007
E-mail: Contact here