Dual track stenciling system with solder gathering head

• US 6,663,712 B2
• Filed: 07/31/2001
• Issued: 12/16/2003
• Est. Priority Date: 02/21/1997
• Status: Expired due to Term

• Current Assignee: KPS Special Situations Fund II, L.P.
• Original Assignee: Speedline Technologies Incorporated (Illinois Tool Works Inc.)
• Inventors: Doyle, Dennis G., Hall, Steven W., Freeman, Gary T.
• Primary Examiner(s): LORENGO, JERRY A
• Application Number:
  US09/918,698
• Publication Number:
  US 20020020346A1
• Time in Patent Office: 868 Days
• Field of Search: 101/114, 101/44, 101/121, 101/123, 101/127, 101/127.1, 101/366, 118/213, 118/301, 118/406, 118/410, 118/413, 118/313, 427/96, 427/282, 198/817
• US Class Current: 118/301
• CPC Class Codes: H05K 3/1216 by screen printing or stencil printing

Abstract

A dual track stencil system includes a first set of rails and a second set of rails, each of the rails being independently controlled for allowing for independent movement of circuit boards through the stencil system for processing. A stencil, having two patterns, each aligned with a respective working area of each track is suspended above the dual track system. In one embodiment, the solder dispensing unit includes a squeegee arm with a solder gathering head. During operation using the squeegee arm with the solder gathering head, two circuit boards are fed to the working area, and both of the circuit boards are serially processed, with excess solder being removed from the board after the processing of each of the boards.

Claims

1. A stencil system for use in circuit board manufacturing, comprising:

a frame;

a stencil coupled to the frame, the stencil having a first pattern for printing material on a first circuit board at a first work position and a second pattern for printing material on a second circuit board at a second work position; and

means for simultaneously moving the first circuit board to the first work position and the second circuit board to the second work position.

2. The stencil system of claim 1, wherein the means for simultaneously moving includes a first set of rails and a second set of rails, and wherein the stencil system further includes means for adjusting a spacing of rails in the first set of rails and a spacing of rails in the second set of rails.

3. The stencil system of claim 2, further comprising a material dispensing unit disposed over the stencil for dispensing material on a surface of the stencil.

4. The stencil system of claim 3, wherein the dispensing material is one of solder and glue.

5. The stencil system of claim 4, further comprising a vacuum system disposed below the stencil that retains the first circuit board at the first work position in the stencil system and retains the second circuit board at the second work position in the stencil system.

6. The stencil system of claim 5, wherein the stencil has a first pattern for printing material on the first circuit board and a second pattern for printing material on the second circuit board.

7. A stencil system for use in circuit board manufacturing, comprising:

a frame;

a plurality of sets of rails, coupled to the frame, each of said plurality of sets of rails for supporting and moving a plurality of circuit boards through said stenciling system along a first axis, wherein at least three of the rails of the plurality of sets of rails are moveable in a direction orthogonal to the first axis; and

a stencil, coupled to the frame, and disposed above the plurality of sets of rails.

8. The stencil system of claim 7, wherein the system is configured and arranged such that the at least three rails are separately controlled to be moveable independently.

9. The stencil system of claim 8, further comprising a material dispensing unit disposed over the stencil for dispensing material on a surface of the stencil.

10. The stencil system of claim 9, wherein the dispensing material is one of solder and glue.

11. The stencil system of claim 10, further comprising a vacuum system disposed below the plurality of sets of rails that retains a first circuit board at a first work position in the stencil system and retains a second circuit board at a second work position in the stencil system.

12. The stencil system of claim 11, wherein the stencil has a first pattern for printing material on the first circuit board and a second pattern for printing material on the second circuit board.

13. The stencil system of claim 7, further comprising a vacuum system disposed below the plurality of sets of rails that retains a first circuit board at a first work position in the stencil system and retains a second circuit board at a second work position in the stencil system.

14. The stencil system of claim 7, wherein the stencil has a first pattern for printing material on the first circuit board and a second pattern for printing material on the second circuit board.