# US 11,077,489 B2 · Core pack

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- Number: US 11,077,489 B2
- Document ID: US11077489B2
- Status: Granted
- Kind: B2
- Application number: 16/536,393
- Filed: 2019-08-09
- Published: 2019-11-28
- Granted: 2021-08-03
- Earliest claimed: 2017-04-06
- Assignees: Bayerische Motoren Werke Aktiengesellschaft
- Applicants: Bayerische Motoren Werke Aktiengesellschaft
- Inventors: Manfred Huber; Thomas Summer
- Web page: https://patentgrep.com/patent/US11077489B2

## CPC

- B22C 9/103: {Multipart cores}
- B22C 9/108: {Installation of cores}
- B22C 9/24: for hollow articles
- B22C: FOUNDRY MOULDING (moulding refractory materials in general B28B)

## Abstract

A core pack has at least two cores. The cores have chaplet sections that are oriented relative to one another and form a print. A chaplet is or can be placed on and/or against the print, thus allowing the cores to be secured relative to one another.

## Claims

### Claim 1

A mold having a core pack, comprising:
an outer mold configured to receive a casting metal;
at least two cores configured to be arranged in the outer mold after the outer mold is formed and to form at least one fluid channel within a casting,
wherein
the at least two cores have mutually oriented chaplet portions which form an appendage in the form of a print when outermost ones of the chaplet portions are in mutual contact in a region containing the chaplet portions, the chaplet portions being configured to not extend to an outer surface of a cast component after being cast within the mold, and
a chaplet element is disposed on top of and/or on the print, on account of which the two cores are mutually fixable.

### Claim 2 (depends on 1)

The mold having a core pack according to claim 1, wherein
the chaplet element is configured for a form-fitting and/or force-fitting disposal.

### Claim 3 (depends on 1)

The mold having a core pack according to claim 1, wherein
the chaplet element is elastic.

### Claim 4 (depends on 3)

The mold having a core pack according to claim 3, wherein
the chaplet element is ring-shaped.

### Claim 5 (depends on 4)

The mold having a core pack according to claim 4, wherein the chaplet element is a spring ring.

### Claim 6 (depends on 3)

The mold having a core pack according to claim 3, wherein
the chaplet element is ring-shaped.

### Claim 7 (depends on 1)

The mold having a core pack according to claim 1, wherein the chaplet element is a spring ring.

### Claim 8 (depends on 1)

The mold having a core pack according to claim 1, wherein
a raw material of the chaplet element corresponds to a casting raw material.

### Claim 9 (depends on 1)

The mold having a core pack according to claim 1, wherein
a melting temperature and/or evaporating temperature of a raw material of the chaplet element is below a melting temperature of a casting raw material.

### Claim 10 (depends on 1)

The mold having a core pack according to claim 1, wherein the chaplet portions in cross section are circle-segment-shaped.

### Claim 11 (depends on 1)

The mold having a core pack according to claim 1, wherein a length-to-diameter ratio of the appendage is less than 0.6.

### Claim 12 (depends on 1)

The mold having a core pack according to claim 1, wherein the core pack is a core pack of a cylinder head.