Apparatus for producing casting mould parts and comprising auxiliary guiding means

• US 6,481,488 B1
• Filed: 11/19/2001
• Issued: 11/19/2002
• Est. Priority Date: 05/17/1999
• Status: Expired due to Term

• Current Assignee: DISA Industries A/S (Naciron Holdings A/S)
• Original Assignee: DISA Industries A/S (Naciron Holdings A/S)
• Inventors: Johansen, Jan Bechmann
• Primary Examiner(s): Elve, M. Alexandra
• Assistant Examiner(s): LIN, ING HOUR
• Application Number:
  US09/979,137
• Time in Patent Office: 365 Days
• Field of Search: 164/169, 164/187, 164/207, 164/182, 164/195
• US Class Current: 164/169
• CPC Class Codes: B22C 11/10 with one or more flasks forming part of the machine, from which only the sand moulds made by compacting are removed
• CPC Class Codes: B22C 21/10 Guiding equipment

Abstract

In an apparatus for producing casting mould parts by compacting sand or other like material between a vertical squeeze plate (1) and a vertical swingable plate (2) in a squeeze chamber (3), wherein the swingable plate (2) swings away after the compaction to allow passage of the mould part from squeeze chamber (3) by further forward movement of the squeeze plate (1) and the swingable plate is journaled on a front yoke (4) mounted on guide columns (5) for movement relative to the squeeze chamber (3), a pull yoke (6) is placed behind the squeeze chamber (3) and connected to the guide columns (5). At least two of the guide columns (5) are journalled in a number of guides (7) connected to a fixed part of the apparatus close to the position of the front yoke (4) in the compacting position and the pull yoke (6) is provided with at least one guide (8) journaled on guide columns (9) connected to fixed parts of the apparatus. By this construction the rigidity of the frame structure consisting of front yoke (4), guide columns (5) and pull yoke (6) is increased by the guidance of the pull yoke which prevents movements in a plane perpendicular to the intended movement of the frame structure.

Claims

1. Apparatus for producing casting mould parts by compacting a material comprising:

a squeeze chamber having a longitudinal axis and including a vertical squeeze plate at a rear end and a vertical swingable plate at a front end;

a rigid frame structure having a longitudinal axis parallel with the longitudinal axis of said squeeze chamber and including

a front yoke to which said swingable plate is pivotally mounted whereby said swingable plate swings away after compaction of the material into a mould part to allow passage of the mould part from the squeeze chamber by a forward movement of the squeeze plate,

guide columns to which said front yoke is mounted, and

a pull yoke located behind said squeeze chamber and connected to said guide columns;

at least two respective fixed guides in which at least two respective said guide columns are respectively journalled for movement parallel to the longitudinal axis of said squeeze chamber, whereby said guide columns, said pull yoke and said front yoke are together movable relative to said squeeze plate between a compaction configuration and an extraction configuration of said squeeze chamber, and such that said guides are located closer to said front yoke when said squeeze chamber is in the compaction configuration than when said squeeze chamber is in the extraction configuration; and

a guiding means for guiding said pull yoke and hence said frame structure for movement between the compaction and the extraction configuration of said squeeze chamber, and against movements in a plane perpendicular to the longitudinal axis of said frame structure, said guiding means being closer to said pull yoke when said squeeze chamber is in the compaction configuration than when said squeeze chamber is in the extraction configuration.

2. Apparatus for producing casting mould parts as claimed in claim 1, wherein said guiding means includes:

a fixed part which is located closer to said pull yoke when said squeeze chamber is in the compaction configuration than when said squeeze chamber is in the extraction configuration;

an auxiliary guide column connected at one end to said fixed part and connected at another end to said squeeze chamber adjacent said squeeze plate; and

a guide mounted to said pull yoke to which said auxiliary guide column is journalled.

3. Apparatus for producing casting mould parts as claimed in claim 2, wherein said guiding means further includes:

two respective said auxiliary guide columns; and

two respective said guides, said two guides being mounted symmetrically to said pull yoke.

4. Apparatus for producing casting mould parts as claimed in claim 1, wherein said guiding means includes respective rollers provided on the pull yoke and associated fixed roller surfaces.

5. Apparatus for producing casting mould parts as claimed in claim 1, wherein said guiding means includes co-operating bearing surfaces provided on said pull yoke and respective fixed parts.

6. Apparatus for producing casting mould parts as claimed in claim 1, wherein said guiding means includes continuations of said guide columns behind said pull yoke and corresponding fixed guides cooperating with said continuations.

7. Apparatus for producing casting mould parts as claimed in claim 1:

wherein said front yoke and said pull yoke each have four corners; and

wherein said frame structure includes four guide columns connecting said front and pull yokes at the corners thereof.

8. Apparatus for producing casting mould parts as claimed in claim 7, wherein said four guide columns are journalled in respective said fixed guides.

9. Apparatus for producing casting mould parts as claimed in claim 1, and further including:

a first hydraulic unit which moves said squeeze plate; and

a second hydraulic unit which moves said frame structure.