# US 5,343,929 A · Apparatus for deburring foundry cores and similar workpieces

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- Number: US 5,343,929 A
- Document ID: US5343929A
- Status: Granted
- Kind: A
- Application number: 07/915,997
- Filed: 1992-07-30
- Granted: 1994-09-06
- Earliest claimed: 1990-01-30
- Assignees: Adolf Hottinger Maschinenbau GmbH
- Inventors: Werner Landua; Werner Pichler
- Web page: https://patentgrep.com/patent/US5343929A

## CPC

- B22C 9/18: Finishing
- B22C: FOUNDRY MOULDING (moulding refractory materials in general B28B)

## Abstract

An apparatus for deburring foundry cores (3) and similar workpieces, comprising a vibration device, a stationary base (10) which carries the vibration device, and a deburring template (4), is designed and constructed for an effective deburring with a reduced risk of damage to the workpiece, and with less wear on tools such that the vibrating movement of the vibration device occurs exclusively in vertical direction, and that a clearance is absent between the contours of the cores (3) to be deburred and the contours of the deburring template (4), so that the burr is cut off as the core (3) passes through the deburring template (4).

## Claims

### Claim 1

An apparatus for removing burrs which protrude from the peripheral edge of a workpiece and comprising
a template having a rigid internal profile which closely conforms to the entire outline of the peripheral edge of the workpiece, with no significant clearance therebetween,
means for supporting the workpiece so that the peripheral edge of the workpiece is aligned in a predetermined direction with said internal profile of said template,
means for vibrating said template so that the template moves exclusively along said predetermined direction, and
means for guiding said workpiece supporting means for linear movement along said predetermined direction and so that the supported workpiece moves through said internal profile of the template and so that the internal profile acts to sever the protruding burrs from the peripheral edge of the workpiece.

### Claim 2 (depends on 1)

The apparatus as defined in claim 1 wherein said means for vibrating said template includes means for selectively varying the amplitude of the vibrations.

### Claim 3 (depends on 1)

The apparatus as defined in claim 1 further comprising a rigid base, and a plate supporting said template, and wherein said means for vibrating said template comprises means mounting said plate to said base so that said plate can move exclusively in said predetermined direction with respect to said base, and vibrator means connected to said plate.

### Claim 4 (depends on 3)

The apparatus as defined in claim 3 wherein said means mounting said plate to said base comprises a plurality of leaf springs and a plurality of buffers.

### Claim 5 (depends on 3)

The apparatus as defined in claim 3 wherein said guiding means includes cooperating male and female members mounted to respective ones of said workpiece supporting means and said base.

### Claim 6 (depends on 1)

The apparatus as defined in claim 1 wherein said workpiece supporting means includes elastic grippers for engaging said workpiece.

### Claim 7

A method for deburring a workpiece such as a molded foundry core comprising the steps of
providing a workpiece having burrs which protrude from the peripheral edge thereof,
providing a template having a fixed internal profile which closely conforms to the entire outline of said peripheral edge of the workpiece, with no significant clearance therebetween,
supporting the workpiece and the template so that the peripheral edge of the workpiece is aligned in a predetermined direction with said internal profile of said template,
vibrating said template so that the template moves exclusively along said predetermined direction, and
guiding said workpiece supporting means for linear movement along said predetermined direction and so that the supported workpiece moves through said internal profile of the vibrating template and the internal profile acts to sever the protruding burrs from the peripheral edge of the workpiece.