Substrate breaker

• US 5,133,491 A
• Filed: 12/20/1990
• Issued: 07/28/1992
• Est. Priority Date: 12/20/1990
• Status: Expired due to Fees

• Current Assignee: DIE-Tech Incorporated
• Original Assignee: DIE-Tech Incorporated
• Inventors: Correll, Thomas R., Dennis, Richard K.
• Primary Examiner(s): Yost, Frank T.
• Assistant Examiner(s): Jones, Eugenia A.
• Application Number:
  US07/630,873
• Time in Patent Office: 586 Days
• Field of Search: 225/1, 225/2, 225/4, 225/96.5, 225/97, 225/103, 225/105, 225/96
• US Class Current: 225/1
• CPC Class Codes: B28D 5/0023 rectilinearly
• CPC Class Codes: Y10T 225/10 Methods
• CPC Class Codes: Y10T 225/12 With preliminary weakening
• CPC Class Codes: Y10T 225/16 Transversely of continuously fed work
• CPC Class Codes: Y10T 225/325 With means to apply moment of force to weakened work
• CPC Class Codes: Y10T 225/329 Plural breakers
• CPC Class Codes: Y10T 225/371 Movable breaking tool

Abstract

A substrate breaker positively feeds substrate plates to a stick breaker where the sticks are broken from the plate. The sticks are fed upwardly to an elevated chip breaker where chips are broken from the sticks.

Claims

1. A substrate breaker comprising:

a) elevated chip breaker means for breaking a lead chip from a stick of chips;

b) stick breaker means located below the chip breaker means for breaking a stick of chips from a substrate plate;

c) a stick feed path extending upwardly from the stick breaker means to the chip breaker means; and

d) stick feed means for moving a stick of chips up the path.

2. A substrate breaker as in claim 1 wherein the chip breaker means includes a chip holder, first holding means for the second lead chip in the stick, and a rotary connection between the chip holder and the first holding means.

3. A substrate breaker as in claim 2 wherein the stick breaker means includes a stick holder, second holding means for the second lead stick in the substrate plate, and a rotary connection between the stick holder and the second holding means.

4. A substrate breaker as in claim 3 wherein each rotary connection is located below the chip holder.

5. A substrate breaker as in claim 3 including plate feed means for moving a plate to the stick breaker means.

6. A substrate breaker as in claim 5 wherein said stick feed path includes a pair of spaced parallel grooves engagable with side edges of a stick, the upper ends of said grooves forming said first holding means, said stick holder comprising a downward extension of one of said grooves.

7. A substrate breaker as in claim 3 wherein the stick feed path extends upwardly at an acute angle.

8. A substrate breaker as in claim 1 wherein the stick feed path extends upwardly at an acute angle.

9. A substrate breaker including a stick assembly having an upwardly extending stick feed path with opposed stick grooves for receiving the edges of a stick;

a chip breaker at the upper end of the feed path;

a stick breaker at the lower end of the feed path having a plate groove for receiving a lead edge of a stick, the plate groove forming a downward extension of one of the path grooves;

a plate assembly including a plate feed path extending toward the stick breaker and a pair of opposed plate feed grooves for receiving the edges of a ceramic chip plate, a plate feeder for moving a plate along the plate feed path to position the lead edge of a stick in the plate groove;

a stick feeder for engaging the end of a stick near the stick breaker and moving such stick into and along the stick feed path to position successive lead chips in the chip breaker.

10. A substrate breaker as in claim 9 wherein the chip breaker includes a chip holder, a rotary connection joining the chip holder to the stick assembly and a drive for rotating the chip breaker relative to the stick assembly.

11. A substrate breaker as in claim 10 including a rotary connection joining the plate assembly to the stick assembly and a drive for rotating the plate assembly relative to the stick assembly.

12. A substrate breaker as in claim 11 wherein the stick feed path extends upwardly at an angle of approximately 15 degrees to the horizontal.

13. A substrate breaker as in claim 12 wherein each rotary includes a hinge having an axis located below the adjacent path.

14. A substrate breaker as in claim 12 wherein one plate feed groove is located above the other plate feed groove.

15. A substrate breaker as in claim 14 wherein said plate feed grooves extend generally perpendicular to said stick grooves.

16. The method of breaking a substrate plate into individual substrate chips comprising the steps of:

a) successively breaking lead sticks from the plate, each stick including an integral row of substrate chips;

b) allowing plate debris formed by breaking to gravity fall away from the sticks;

c) moving each lead stick upwardly from the remainder of the substrate plate; and

d) breaking individual chips from an elevated end of each stick.

17. The method of claim 16 including the step of moving the stick upwardly along its length at an acute angle.

18. The method of claim 16 including the steps of maintaining the plate tilted up at an acute angle during step a) and maintaining each lead stick tilted up at the same acute angle during steps c) and d).

19. The method of claim 16 including the step of holding the lead stick on the plate fixed and rotating the remainder of the plate to break the lead stick from the remainder of the plate.

20. The method of claim 16 including the step of separating the stick from the remainder of the plate immediately after breaking of the stick from the remainder of the plate.