GB2226264A - A sand blowing machine for the manufacture of foundry moulds and cores - Google Patents
A sand blowing machine for the manufacture of foundry moulds and cores Download PDFInfo
- Publication number
- GB2226264A GB2226264A GB8915319A GB8915319A GB2226264A GB 2226264 A GB2226264 A GB 2226264A GB 8915319 A GB8915319 A GB 8915319A GB 8915319 A GB8915319 A GB 8915319A GB 2226264 A GB2226264 A GB 2226264A
- Authority
- GB
- United Kingdom
- Prior art keywords
- moulding
- unit
- core
- operating
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
- B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Devices For Molds (AREA)
- Clamps And Clips (AREA)
Description
A CORE MOULDING MACHINE --- --- --- 1. 1 The invention relates to a
machine for the manufacture of moulds and cores, in particular a core shooting machine, and can be used in the foundry industry, A stable and airtight connection is needed between the operating unit (e. g. a blowing or shooting unit) and a moulding unit (e.g. a core box or moulding box) for the pressure shock compression of mould materials in the mould and core boxes. It is known tg raise the core box by means of a lifting device and to press it against the shooting head of a shooting unit. It is also known to lower a container filled with moulding sand until it rests firmly on the moulding box. It is further known to clamp the moulding or core box between a pressing frame and a pattern plate. In all of these solutions.. a releasable connection is produced between the operating and moulding unit exclusively by a non- positive system. The disadvantage of this is that the resulting high contact forces must be - 2 absorbed by the machine frame which is thus subject to high mechanical stress and is exposed to high wear. These moulding machines must therefore be made from very strong material.
Furthermore, an additional energy requirement is necessary for the buildup and maintenance of high contact forces.
It is the aim of the invention to reduce wear on a moulding machine, to minimise the weight of the machine and to lower the energy consumption.
It is an object of the invention to provide a moulding machine in which the operating unit and the moulding unit form a stable, airtight and easily released connection independently of and without including the machine frame. the contact force only being introduced into the operating unit and moulding unit, the machine frame serving exclusively to receive the operating elements.
1 According to the invention, there is provided a core moulding machine comprising a moulding unit arranged below an operating unit which is connected non-positively to the moulding unit during the operating cycle and is guided freely in a form-fitting manner by a machine frame.
Preferably the non-positive connection between operating and moulding unit is formed by means of parts corresponding to each other and which preferably comprise clamping devices and journals. In a preferred embodiment, the clamping devices are made so they can be moved horizontally and vertically, in particular by means of drives.
As a result, the moulding unit can be pressed against the operating unit using considerable force when the moulding and operating unit are fitted together. without the force having A straining effect on the machine frame.
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings.. in which:
- 4 Figure 1 shows schematically the operating unit and moulding unit of a core shooting machine in their closed position, and Figure 2 shows the machine of Figure 1 in its open position.
An operating unit 1, such as a shooting unit, is arranged on the upper part of a known core shooting machine (not shown) so its construction will not be explained in any detail. This operating unit 1 has lateral clamping devices 2 in its lower region which can be moved vertically and horizontally by drive means (not shown). A core box 3 which has journals 4 on its side facing the operating unit 1, is arranged below the operating unit 1 to act as a moulding unit 3. The journals 4 have a size and shape such that they correspond to the clamping devices 2 of the operating unit 1, wherein the journals 4 and the clamping devices 2 engage one another and form a formfitting system in the closed position ( Figure 1) of the clamping devices 2.
After inserting the moulding unit 3 below the operating unit 1 of the core shooting machine using guide rails (not shown), until the clamping devices 2 and journals 4 engage one another, the clamping devices 2 are moved upwards by actuating their drives (not shown). until the clamping devices 2 of the operating unit 1 form a system closed per se with the journals 4 of the moulding unit 3. The moulding unit 3 is thus pressed firmly and airtightly against the operating unit 1 by means of its limiting surface facing the operating unit 1, without the contact force having an effect on the machine frame. The injection can then be triggered and the moulding uni 3 is thus filled with core sand. When the injection is completed, the clamping devices 2 are moved downwards until the connection between them and the journals 4 is released again. Finally, the core can be removed from the moulding unit 3 of the core shooting machine.
The advantages of the illustrated preferred embodiment of the invention are as follows zb - 6 a) The machine frame can be constructed using strict weight-saving parameters.
is b) A bearing surface for the moulding unit is not needed.
c) The free space below the moulding unit can be used for the arrangement of spare parts which may be necessary.
d) A reduction of the energy requirement.
e) A reduction of the wear on the structural components essential for operation.
1
Claims (5)
1. A core moulding machine comprising a moulding unit arranged below an operating unit which is connected non-positively to the moulding unit during the operating tycle and is guided freely in a form-fitting manner by a machine frame.
2. A moulding machine according to claim 1, wherein the non-positive connection between the operating unit and moulding unit comprises parts corresponding to one another.
3. A moulding machine as claimed in claim 2 wherein the corresponding parts are clamping devices and journals.
4. A moulding machine according to claim 2 or claim 3 wherein the clamping devices are made so they can be moved horizontally and vertically.
5. A core moulding machine substantially as herein described with reference to the accompanying drawings.
Published 1990 at 7he Patent OLIzc.S,ateHouse.66 71 HigliHc.jDrr,LcndonWC1R4TP-F-urther copies may be &-1mnedL-cm-.'iePatez-, Wice Sales Bran& St Ma-y Cray. Orpinglon. Kent BRE 3RD- PTnited by Lechraques ltd. St Ma-y Crky. Kent- Cen. 1 87
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD32383388A DD284348A7 (en) | 1988-12-23 | 1988-12-23 | MOLDING MACHINE, IN PARTICULAR CORE FORMING MACHINE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8915319D0 GB8915319D0 (en) | 1989-08-23 |
| GB2226264A true GB2226264A (en) | 1990-06-27 |
| GB2226264B GB2226264B (en) | 1993-07-28 |
Family
ID=5605600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8915319A Expired - Fee Related GB2226264B (en) | 1988-12-23 | 1989-07-04 | A core moulding machine |
Country Status (4)
| Country | Link |
|---|---|
| DD (1) | DD284348A7 (en) |
| DE (1) | DE3919112A1 (en) |
| ES (1) | ES2019765A6 (en) |
| GB (1) | GB2226264B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB764990A (en) * | 1953-12-07 | 1957-01-02 | Sutter Products Company | Improvements in or relating to machines for the manufacture of foundry cores |
| GB794903A (en) * | 1953-08-15 | 1958-05-14 | Foundry Equipment Ltd | Improvements in or relating to the production of foundry moulds, cores and gates |
| GB798796A (en) * | 1955-07-15 | 1958-07-30 | Ind Foundry Materials Ltd | Method of and machine for making shell moulds |
| GB880853A (en) * | 1958-09-17 | 1961-10-25 | Ind Foundry Materials Ltd | An improved machine for making shell moulds |
| GB1352562A (en) * | 1968-02-26 | 1974-05-08 | Sherwin Williams Co | Foundry sand article forming machine and method |
-
1988
- 1988-12-23 DD DD32383388A patent/DD284348A7/en not_active IP Right Cessation
-
1989
- 1989-06-11 DE DE19893919112 patent/DE3919112A1/en not_active Withdrawn
- 1989-07-04 GB GB8915319A patent/GB2226264B/en not_active Expired - Fee Related
- 1989-12-20 ES ES8904299A patent/ES2019765A6/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB794903A (en) * | 1953-08-15 | 1958-05-14 | Foundry Equipment Ltd | Improvements in or relating to the production of foundry moulds, cores and gates |
| GB764990A (en) * | 1953-12-07 | 1957-01-02 | Sutter Products Company | Improvements in or relating to machines for the manufacture of foundry cores |
| GB798796A (en) * | 1955-07-15 | 1958-07-30 | Ind Foundry Materials Ltd | Method of and machine for making shell moulds |
| GB880853A (en) * | 1958-09-17 | 1961-10-25 | Ind Foundry Materials Ltd | An improved machine for making shell moulds |
| GB1352562A (en) * | 1968-02-26 | 1974-05-08 | Sherwin Williams Co | Foundry sand article forming machine and method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8915319D0 (en) | 1989-08-23 |
| DD284348A7 (en) | 1990-11-14 |
| GB2226264B (en) | 1993-07-28 |
| ES2019765A6 (en) | 1991-07-01 |
| DE3919112A1 (en) | 1990-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940704 |