EP2085199A1 - Device with improved ejecting base - Google Patents
Device with improved ejecting base Download PDFInfo
- Publication number
- EP2085199A1 EP2085199A1 EP09075033A EP09075033A EP2085199A1 EP 2085199 A1 EP2085199 A1 EP 2085199A1 EP 09075033 A EP09075033 A EP 09075033A EP 09075033 A EP09075033 A EP 09075033A EP 2085199 A1 EP2085199 A1 EP 2085199A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ejector
- mould
- ejector base
- mould container
- plate
- 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
- 239000011449 brick Substances 0.000 claims abstract description 42
- 239000004927 clay Substances 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 description 9
- 238000001035 drying Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000269350 Anura Species 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
- B28B7/366—Replaceable lining plates for press mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
- B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
Definitions
- the present invention relates to a device with an improved ejecting base.
- mould container presses to which the present invention relates, deformable clay is pressed in mould containers (usually covered with sand). The green brick formed in the mould container is then released in order to be dried and fired.
- a mould container press comprises a chain conveyor which is assembled from a large number of mutually connected mould container parts.
- Each mould container part generally comprises a plurality of mould containers in which the green bricks are formed.
- Ejectors are arranged in each mould container part for the purpose of pressing the green bricks out of the respective mould container.
- Such ejectors are subject to wear and must therefore be regularly replaced with new ejectors. Partly due to the large number of ejectors per mould container press, this is a time-consuming repair, wherein the mould container press cannot be employed for the production of bricks for a considerable length of time.
- the ejector bases of the ejectors are usually provided with insert plates which must be replaced regularly. Due to the repeated exposure to hot and moist clay and under the compression forces of the mould container press the screws with which the insert plates are attached to a mother plate of the ejector have a tendency to become rust-bound. Replacement of an insert plate in practice often involves time-consuming operations such as drilling out an old screw and tapping a new screw thread before a new screw can be applied for the purpose of fastening a new insert plate.
- a mould container press with 24 mould containers per mould container part, which comprises a total of 50 mould container parts, has no less than 1200 ejectors. Replacement of all the ejector bases of these ejectors is very labour-intensive, wherein the mould container press cannot be employed for the production of bricks for a considerable length of time.
- An object of the present invention is to provide a device with an ejecting device and methods therefor which is improved relative to the prior art and wherein at least one of the above stated problems is obviated.
- an insert plate which is connected to the ejector base with a plug and screw connection, this further reducing the period of time for which the mould container press is unavailable for the production of bricks.
- an old insert plate is replaced, only the screw need be removed from the old plug and a new plug optionally arranged. This takes considerably less time than retapping a screw thread, which has been found to be regularly necessary in practice because the screws tended to become rust-bound due to the repeated exposure to hot and moist clay and under the compression forces of the mould container press. Such rust-bound screws had to be drilled out in order to remove an old insert plate.
- the ejecting device further comprises:
- an assembled ejecting device can be displaced through the opening in the mould container part, this ejecting device can already be preassembled elsewhere. According to the invention the period of time for which the mould container press cannot be utilized for manufacturing bricks as a result of repair or replacement operations on the ejecting devices is reduced.
- the intermediate member is adapted, in the situation arranged between the tensioning means and the opening, to function as stop for the at least slightly biased tensioning means.
- the intermediate member is a spring washer with a recess, whereby the intermediate member can be arranged round the ejector shaft after the tensioning means and the stop have been arranged. It is hereby possible to apply a preassembled ejecting device.
- the ejector shaft is connected in fixed manner to the ejector base, this having the advantage that according to the invention a welded connection can now be applied instead of a connection with screw thread.
- a welded connection is robust, and the step of assembling shaft and bottom plate is unnecessary, which results in time-saving during replacement.
- connection is 'non-releasable', or that the connection can be released only in a destructive manner, such as for instance with a saw or flame cutter.
- the ejector shaft is provided with a screw thread at least on its outer end remote from the ejector base.
- the ejector shaft comprises a bolt which is attached in fixed manner to the ejector base with a head end of the bolt, for instance by means of a weld connection.
- the tensioning means comprise a compression spring which is arranged around the ejector shaft and which pulls the ejector base downward in the mould container until the ejector shaft is displaced for pressing out of the mould container a green brick formed therein.
- the stop comprises at least a nut arranged on the screw thread.
- This nut which is for instance a cap nut, can be displaced over the screw thread to a position in which the tensioning means have a desired bias.
- the position of the cap nut can be secured with a lock nut.
- the insert plate is a rubber plate.
- rubber plates are flexible, and sand and clay adhere less to rubber than to for instance wood or plastic.
- the mould containers hereby wear less when rubber plates are used than when wooden or plastic plates are used.
- the mould container comprises upright walls which form a mould cavity, and a plate can be arranged against an upright wall in the mould cavity.
- a plate can be arranged against an upright wall in the mould cavity.
- the present invention further relates to an (ejecting) device for pressing a green brick out of a mould container, comprising:
- the ejecting device further comprises:
- the present invention further relates to an ejecting device for pressing a green brick out of a mould container, comprising:
- the insert plate comprises a rubber plate.
- the present invention further relates to a mould container part, comprising:
- the present invention further relates to a device for manufacturing green bricks from clay for the brick manufacturing industry, comprising:
- the ejecting device is adapted to eject a green brick present in the mould container onto an associated take-off plate during a release stage.
- the present invention further relates to a method for assembling one or more mould containers with an ejecting device for forming bricks, comprising the following steps of:
- the ejecting device is a preassembled ejector base, shaft, spring and stop for the spring as described above.
- the preassembly of the ejecting device takes place at least partly mechanically, this providing a reproducible assembly and reducing the manual labour required.
- the present invention further relates to a method for fixing an insert plate to an ejector base, comprising the following steps of:
- the present invention further relates to a method for adjusting the dimensions of a green brick to be formed in a mould container, comprising the step of arranging against one or more upright walls of the mould container a plate which is adapted to adjust the internal dimensions of the mould container.
- Figure 1 shows a cut-away view of a prior art mould container part 2, which shows a mould container 4 which is enclosed by upright walls 6 and a displaceable ejector base 8 of an ejector 10.
- Prior art ejector 10 comprises an ejector shaft 12 which is provided with an external screw thread on its outer ends 14, 16. Using external screw thread 14 the ejector shaft 12 is fastened in a hole with internal screw thread in ejector base 8.
- Ejector 10 lies under bias of a spring 18, which presses with its one outer end 20 against a bottom wall 24 of mould container part 2. With its other outer end 22 the spring 18 presses against a press-out beam 28 on which ejector shaft 12 is mounted using nuts 30, 32 and lock nut 34. When press-out beam 28 is displaced, ejector bases 8 are displaced via ejector shafts 12 for the purpose of pressing a green brick out of mould container 4.
- ejector base 8 is assembled from a mother plate 36 and a releasable plate 38 arranged thereon.
- the connection between mother plate 36 and releasable plate 38 takes place using screws 40.
- FIG. 2 shows a cut-away side view of an ejector 60 and a mould container part 52 according to the present invention.
- Mould container part 52 comprises different mould contains 54 combined to form a unit.
- Mould container part 52 further comprises a chain part 86 onto which link parts 88 are welded.
- a shaft 94 is inserted through the link parts, these mould container parts 52 are combined to form a chain conveyor (not shown).
- a runner 90 Situated on the end of shaft 94 is a runner 90.
- a bolt 92 is also provided to lock the shaft 94 through link parts 88.
- Ejector 60 is assembled from an ejector base 58 and an ejector shaft 62 which is provided with screw thread 64 on at least its side remote from ejector base 58.
- ejector shaft 62 forms part of a bolt which is fixedly welded with its bolt head 66 to ejector base 58.
- Such bolts are commercially available in different lengths and can be applied without machine-finishing being required.
- ejector shaft 62 comprising a threaded end of a bolt.
- a nut (not shown) is in this case welded fixedly to ejector base 58. Ejector shaft 62 is then screwed with its screw thread fixedly into this nut.
- a spring 68 Arranged round the ejector shaft is a spring 68 which engages with its outer end 72 on an edge 78 of a cap nut 76 screwed onto the outer end of ejector shaft 62 provided with screw thread 64.
- This cap nut 76 is preferably a hollow cap nut so that it can be displaced freely over screw thread 64 of ejector shaft 62 in order to provide a flexible length adjustment. Once set to the desired length, the position of cap nut 76 is secured with a lock nut 80.
- Ejector base 58 is arranged displaceably in mould container 54 of mould container part 52, as will be elucidated hereinbelow.
- Mould container part 52 comprises in its bottom wall 74 a hole 82 which has dimensions such that the assembled ejector 60, i.e. mounted with cap nut 76 and spring 68, can be displaced through this hole (arrow A in figure 2 ).
- Hole 82 therefore has a diameter which is at least slightly larger than the outer diameter of edge 78 of cap nut 76 and spring 68. Because an assembled ejector 60 is displaceable according to the invention through the hole, this ejector 60 can already be preassembled elsewhere. The period of time for which the mould container press is unavailable for the production of bricks can therefore be reduced considerably.
- spring 68 is compressed so far with a tool (not shown) that the upper outer end 70 of spring 68 is situated below bottom wall 74 of mould container part 52.
- a spring washer 84 is then arranged around ejector shaft 62 in the space between the upper outer end 70 of compressed spring 68 and bottom wall 74 (arrow B in figure 2 ).
- This spring washer 84 comprises two annular parts 85 and 87 offset relative to each other ( figure 4 ).
- a recess 89 is further arranged so that spring washer 84 can slide around ejector shaft 62.
- the first annular part 85 has an outer diameter slightly smaller than the diameter of hole 82 in bottom wall 74 of mould container part 52, so that annular part 85 fits into hole 82 (see figure 3 ).
- the second annular part 87 which is offset relative to the first annular part 85, has a larger diameter than hole 82 in bottom wall 74, so that annular part 87 can function as contact surface with bottom wall 74, while annular part 85 is situated in hole 82.
- spring washer 84 Once spring washer 84 has been arranged around ejector shaft 62 between bottom wall 74 and outer end 70 of spring 68, the tool (not shown) which compresses spring 68 is removed. The pressure will be eased on spring 68 which is left biased to at least some extent between the cap nut 76 with stop 78 and the spring washer 84. Annular part 85 of spring washer 84 functions as contact surface for outer end 70 of spring 68. Because spring 68 lies biased to at least some extent between the bottom wall 74 with spring washer 84 and the cap nut 76 with stop 78, spring washer 84 is pressed into hole 82. Because annular parts 85, 87 are offset relative to each other, annular part 87 functions as contact surface with bottom wall 74 while annular part 85 prevents spring washer 84 being able to move out of hole 82.
- Ejector base 58 comprises a bottom plate 99, a mother plate 100 and a plate 102 arranged releasably thereon.
- the plug connection according to the present invention shown in detail in figure 5 comprises a plug 106 which can be placed through a drilled hole 104, after which releasable plate 102 is fastened to bottom plate 99 and mother plate 100 by arranging a screw 108 in plug 106.
- Bottom plate 99 and mother plate 100 can be manufactured integrally.
- the plug connection according to the present invention has the advantage that an old plug 106 can easily be removed and replaced with a new plug 106.
- the plug 106 also extends at least through mother plate 100 to the interface between mother plate 100 and releasable plate 102, or even to the upper surface of releasable plate 102 (position a in figure 5 ).
- This has the advantage that, when the screw connection of plug 106 is used to secure protrusions (not shown), so-called frogs, to be arranged in mould container 54, plug 106 ensures the position of mother plate 100 relative to fixed bottom plate 99 while screw 108 is temporarily removed. It is of course also possible to envisage an application wherein the plug extends to the interface between fixed bottom plate 99 and mother plate 100 (position b in figure 5 ).
- a brick length correction plate 98 can further be arranged on upright wall 56 ( figures 2 and 3 ).
- This brick length correction plate 98 comprises a plate which is fixed against wall 56 in mould container 54.
- the length dimension of the green brick (not shown) to be arranged in mould container 54 is reduced by the thickness of correction plate 98.
- the size of the green bricks to be formed can be corrected by the simple operation of arranging such a correction plate 98 in each mould container 54. This correction is for instance desirable so as to anticipate the shrinking behaviour of the clay during the drying and firing by adjusting the size of the green brick beforehand to the measure of shrinkage expected during drying and firing of the respective clay composition. Because only a few plates have to be placed, removed or exchanged according to the present invention, a correction of the size of the green brick can be realized in relatively simple manner and at low cost.
- Suitable materials for correction plate 98 are for instance wood, plastic and metal.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
- a mould container part (52) with at least one mould container (54) for forming therein a green brick from clay;
- an ejecting device (60) for pressing out of the mould container (54) the green brick to be formed in the mould container (54), the ejecting device (60) comprising:
- an ejector base (58);
- wherein an insert plate (102) is arranged on the ejector base, which plate is connected to the ejector base with a plug (106) and screw (108) connection.
Description
- The present invention relates to a device with an improved ejecting base.
- In so-called mould container presses, to which the present invention relates, deformable clay is pressed in mould containers (usually covered with sand). The green brick formed in the mould container is then released in order to be dried and fired. Such a mould container press comprises a chain conveyor which is assembled from a large number of mutually connected mould container parts. Each mould container part generally comprises a plurality of mould containers in which the green bricks are formed. Ejectors are arranged in each mould container part for the purpose of pressing the green bricks out of the respective mould container. Such ejectors are subject to wear and must therefore be regularly replaced with new ejectors. Partly due to the large number of ejectors per mould container press, this is a time-consuming repair, wherein the mould container press cannot be employed for the production of bricks for a considerable length of time.
- The ejector bases of the ejectors are usually provided with insert plates which must be replaced regularly. Due to the repeated exposure to hot and moist clay and under the compression forces of the mould container press the screws with which the insert plates are attached to a mother plate of the ejector have a tendency to become rust-bound. Replacement of an insert plate in practice often involves time-consuming operations such as drilling out an old screw and tapping a new screw thread before a new screw can be applied for the purpose of fastening a new insert plate.
- A mould container press with 24 mould containers per mould container part, which comprises a total of 50 mould container parts, has no less than 1200 ejectors. Replacement of all the ejector bases of these ejectors is very labour-intensive, wherein the mould container press cannot be employed for the production of bricks for a considerable length of time.
- It may also be necessary to adjust the internal volume of the mould containers in order to implement corrections in the brick size, as is for instance necessary if the clay displays varying shrinking behaviour during drying and firing. Such adjustments are very labour-intensive and for instance comprise of welding or adhering plates in the mould containers, and even extend to replacing an entire mould container part.
- An object of the present invention is to provide a device with an ejecting device and methods therefor which is improved relative to the prior art and wherein at least one of the above stated problems is obviated.
- Said object is achieved with the device according to the present invention, comprising:
- a mould container part with at least one mould container for forming therein a green brick from clay;
- an ejecting device for pressing out of the mould container the green brick to be formed in the mould container, the ejecting device comprising:
- an ejector base;
- wherein an insert plate is arranged on the ejector base, which plate is connected to the ejector base with a plug and screw connection.
- According to the invention there is arranged on the ejector base an insert plate which is connected to the ejector base with a plug and screw connection, this further reducing the period of time for which the mould container press is unavailable for the production of bricks. When an old insert plate is replaced, only the screw need be removed from the old plug and a new plug optionally arranged. This takes considerably less time than retapping a screw thread, which has been found to be regularly necessary in practice because the screws tended to become rust-bound due to the repeated exposure to hot and moist clay and under the compression forces of the mould container press. Such rust-bound screws had to be drilled out in order to remove an old insert plate.
- According to a preferred embodiment, the ejecting device further comprises:
- an ejector shaft which is connected to the ejector base with a first outer end and is provided with a stop at a second outer end; and
- tensioning means which are arranged around the ejector shaft and which can be engaged with the stop; and
- the mould container part comprises an opening through which it is possible to displace the ejecting device with its shaft having tensioning means arranged therearound and stop; and
- an intermediate member can be arranged and removed between the tensioning means and the opening in the mould container part.
- Because according to the invention an assembled ejecting device can be displaced through the opening in the mould container part, this ejecting device can already be preassembled elsewhere. According to the invention the period of time for which the mould container press cannot be utilized for manufacturing bricks as a result of repair or replacement operations on the ejecting devices is reduced.
- In a preferred embodiment the intermediate member is adapted, in the situation arranged between the tensioning means and the opening, to function as stop for the at least slightly biased tensioning means.
- In a further preferred embodiment the intermediate member is a spring washer with a recess, whereby the intermediate member can be arranged round the ejector shaft after the tensioning means and the stop have been arranged. It is hereby possible to apply a preassembled ejecting device.
- In a preferred embodiment the ejector shaft is connected in fixed manner to the ejector base, this having the advantage that according to the invention a welded connection can now be applied instead of a connection with screw thread. Such a welded connection is robust, and the step of assembling shaft and bottom plate is unnecessary, which results in time-saving during replacement.
- It is noted, perhaps unnecessarily, that 'connected in fixed manner' is understood to mean that the connection is 'non-releasable', or that the connection can be released only in a destructive manner, such as for instance with a saw or flame cutter.
- In a further preferred embodiment the ejector shaft is provided with a screw thread at least on its outer end remote from the ejector base.
- In a further preferred embodiment the ejector shaft comprises a bolt which is attached in fixed manner to the ejector base with a head end of the bolt, for instance by means of a weld connection.
- In yet another preferred embodiment the tensioning means comprise a compression spring which is arranged around the ejector shaft and which pulls the ejector base downward in the mould container until the ejector shaft is displaced for pressing out of the mould container a green brick formed therein.
- In yet another preferred embodiment the stop comprises at least a nut arranged on the screw thread. This nut, which is for instance a cap nut, can be displaced over the screw thread to a position in which the tensioning means have a desired bias.
- In a further preferred embodiment the position of the cap nut can be secured with a lock nut.
- In yet another preferred embodiment the insert plate is a rubber plate. Such rubber plates are flexible, and sand and clay adhere less to rubber than to for instance wood or plastic. The mould containers hereby wear less when rubber plates are used than when wooden or plastic plates are used.
- According to a further preferred embodiment of the present invention, the mould container comprises upright walls which form a mould cavity, and a plate can be arranged against an upright wall in the mould cavity. By arranging the plate against a wall in the internal volume of the mould cavity the internal volume of the mould cavity can be adapted in order to implement corrections in the brick size, as is necessary for instance if the clay displays varying shrinking behaviour during drying and firing. Because the dimensions of the green brick can be corrected according to the invention by simply replacing a plate, it is possible to reduce the period of time for which the mould container press cannot be utilized for manufacturing bricks as a consequence of operations for adjusting the size of the mould container.
- The present invention further relates to an (ejecting) device for pressing a green brick out of a mould container, comprising:
- an ejector base;
- wherein an insert plate is arranged on the ejector base, which plate is connected to the ejector base with a plug and screw connection.
- According to a preferred embodiment, the ejecting device further comprises:
- an ejector shaft which is connected to the ejector base with a first outer end and is provided with a stop at a second outer end; and
- tensioning means which are arranged around the ejector shaft and which can be engaged with the stop; and
- the mould container part comprises an opening through which it is possible to displace the ejecting device with its shaft having tensioning means arranged therearound and stop; and
- an intermediate member can be arranged and removed between the tensioning means and the opening in the mould container part.
- The present invention further relates to an ejecting device for pressing a green brick out of a mould container, comprising:
- an ejector base;
- an ejector shaft which is connected to the ejector base with a first outer end and is provided with a stop at a second outer end;
- tensioning means which are arranged around the ejector shaft and which can be engaged with the stop; and
- wherein an insert plate is arranged on the ejector base, which plate is connected to the ejector base with a plug and screw connection.
- According to a further preferred embodiment, the insert plate comprises a rubber plate.
- The present invention further relates to a mould container part, comprising:
- at least one mould container arranged in the mould container part for forming a green brick therein from clay;
- wherein the mould container comprises upright walls; and
- wherein a plate adapted to adjust the internal dimensions of the mould container can be arranged in the mould container against an upright wall thereof and can be removed therefrom.
- The present invention further relates to a device for manufacturing green bricks from clay for the brick manufacturing industry, comprising:
- a circulating conveyor carrying mould container parts with one or more mould containers;
- a reservoir for clay arranged above the mould containers;
- clay arranging means for arranging clay from the reservoir in the mould containers;
- means for covering an open side of the mould containers with take-off plates;
- at least one ejecting device arranged on the conveyor and movable relative to the conveyor;
- wherein the ejecting device is adapted to eject a green brick present in the mould container onto an associated take-off plate during a release stage; and
- wherein an insert plate is arranged on the ejector base, which plate is connected to the ejector base with a plug and screw connection.
- According to a further preferred embodiment, the ejecting device is adapted to eject a green brick present in the mould container onto an associated take-off plate during a release stage.
- The present invention further relates to a method for assembling one or more mould containers with an ejecting device for forming bricks, comprising the following steps of:
- placing an ejecting device through an opening in a bottom of the mould container, wherein the ejecting device comprises at least a preassembled ejector base, shaft, spring and stop for the spring;
- temporarily compressing the spring in order to provide a space between the spring and the bottom of the mould container;
- arranging an intermediate member in the space between the spring and the bottom; and
- allowing the pressure on the spring to be eased, wherein the spring is left biased to at least some extent between the stop and the intermediate member.
- In a preferred embodiment of the method the ejecting device is a preassembled ejector base, shaft, spring and stop for the spring as described above.
- In yet another preferred embodiment of the method the preassembly of the ejecting device takes place at least partly mechanically, this providing a reproducible assembly and reducing the manual labour required.
- The present invention further relates to a method for fixing an insert plate to an ejector base, comprising the following steps of:
- positioning the insert plate on the ejector base such that holes arranged in the insert plate are aligned with holes arranged in the ejector base;
- placing a plug through the aligned holes; and
- arranging a screw in the plug in order to fix the insert plate to the ejector base.
- The present invention further relates to a method for adjusting the dimensions of a green brick to be formed in a mould container, comprising the step of arranging against one or more upright walls of the mould container a plate which is adapted to adjust the internal dimensions of the mould container.
- Preferred embodiments of the present invention are further elucidated in the following description with reference to the drawing, in which:
-
Figure 1 shows a perspective view of a prior art device; -
Figure 2 shows a cut-away side view of the device according to the present invention; -
Figure 3 is a cut-away side view in assembled state of the device shown infigure 2 ; -
Figure 4 is a perspective detail view of the spring washer shown infigures 2 and3 ; and -
Figure 5 is a detail view of the plug connection shown infigure 3 . -
Figure 1 shows a cut-away view of a prior artmould container part 2, which shows a mould container 4 which is enclosed byupright walls 6 and adisplaceable ejector base 8 of anejector 10. Once a green brick (not shown) has been arranged in mould container 4, the top side is covered with a cover plate (not shown) on which the green bricks - after being released from mould container 4 using ejector 10- are discharged to for instance a drying chamber for further treatment. -
Prior art ejector 10 comprises anejector shaft 12 which is provided with an external screw thread on its outer ends 14, 16. Usingexternal screw thread 14 theejector shaft 12 is fastened in a hole with internal screw thread inejector base 8. -
Ejector 10 lies under bias of aspring 18, which presses with its one outer end 20 against abottom wall 24 ofmould container part 2. With its other outer end 22 thespring 18 presses against a press-out beam 28 on whichejector shaft 12 is mounted usingnuts lock nut 34. When press-out beam 28 is displaced,ejector bases 8 are displaced viaejector shafts 12 for the purpose of pressing a green brick out of mould container 4. - As
figure 1 shows,ejector base 8 is assembled from amother plate 36 and areleasable plate 38 arranged thereon. Inprior art ejector 10 the connection betweenmother plate 36 andreleasable plate 38 takes place using screws 40. -
Figure 2 shows a cut-away side view of anejector 60 and amould container part 52 according to the present invention.Mould container part 52 comprises different mould contains 54 combined to form a unit.Mould container part 52 further comprises achain part 86 onto which linkparts 88 are welded. When differentmould container parts 52 withchain parts 86 are placed adjacently of each other and ashaft 94 is inserted through the link parts, thesemould container parts 52 are combined to form a chain conveyor (not shown). Situated on the end ofshaft 94 is arunner 90. Abolt 92 is also provided to lock theshaft 94 throughlink parts 88. -
Ejector 60 is assembled from anejector base 58 and anejector shaft 62 which is provided withscrew thread 64 on at least its side remote fromejector base 58. In a very advantageousembodiment ejector shaft 62 forms part of a bolt which is fixedly welded with itsbolt head 66 toejector base 58. Such bolts are commercially available in different lengths and can be applied without machine-finishing being required. - It is noted that it is also possible to envisage the
ejector shaft 62 comprising a threaded end of a bolt. Instead of fixedly welding abolt head 66, a nut (not shown) is in this case welded fixedly toejector base 58.Ejector shaft 62 is then screwed with its screw thread fixedly into this nut. - Arranged round the ejector shaft is a
spring 68 which engages with itsouter end 72 on anedge 78 of acap nut 76 screwed onto the outer end ofejector shaft 62 provided withscrew thread 64. Thiscap nut 76 is preferably a hollow cap nut so that it can be displaced freely overscrew thread 64 ofejector shaft 62 in order to provide a flexible length adjustment. Once set to the desired length, the position ofcap nut 76 is secured with alock nut 80. -
Ejector base 58 is arranged displaceably inmould container 54 ofmould container part 52, as will be elucidated hereinbelow. -
Mould container part 52 comprises in its bottom wall 74 ahole 82 which has dimensions such that the assembledejector 60, i.e. mounted withcap nut 76 andspring 68, can be displaced through this hole (arrow A infigure 2 ).Hole 82 therefore has a diameter which is at least slightly larger than the outer diameter ofedge 78 ofcap nut 76 andspring 68. Because an assembledejector 60 is displaceable according to the invention through the hole, thisejector 60 can already be preassembled elsewhere. The period of time for which the mould container press is unavailable for the production of bricks can therefore be reduced considerably. - After the assembled
ejector 60 has been inserted throughhole 82,spring 68 is compressed so far with a tool (not shown) that the upperouter end 70 ofspring 68 is situated belowbottom wall 74 ofmould container part 52. - A
spring washer 84 is then arranged aroundejector shaft 62 in the space between the upperouter end 70 of compressedspring 68 and bottom wall 74 (arrow B infigure 2 ). - This
spring washer 84 comprises twoannular parts figure 4 ). Arecess 89 is further arranged so thatspring washer 84 can slide aroundejector shaft 62. The firstannular part 85 has an outer diameter slightly smaller than the diameter ofhole 82 inbottom wall 74 ofmould container part 52, so thatannular part 85 fits into hole 82 (seefigure 3 ). The secondannular part 87, which is offset relative to the firstannular part 85, has a larger diameter thanhole 82 inbottom wall 74, so thatannular part 87 can function as contact surface withbottom wall 74, whileannular part 85 is situated inhole 82. - Once
spring washer 84 has been arranged aroundejector shaft 62 betweenbottom wall 74 andouter end 70 ofspring 68, the tool (not shown) which compressesspring 68 is removed. The pressure will be eased onspring 68 which is left biased to at least some extent between thecap nut 76 withstop 78 and thespring washer 84.Annular part 85 ofspring washer 84 functions as contact surface forouter end 70 ofspring 68. Becausespring 68 lies biased to at least some extent between thebottom wall 74 withspring washer 84 and thecap nut 76 withstop 78,spring washer 84 is pressed intohole 82. Becauseannular parts annular part 87 functions as contact surface withbottom wall 74 whileannular part 85 preventsspring washer 84 being able to move out ofhole 82. -
Ejector base 58 comprises abottom plate 99, amother plate 100 and aplate 102 arranged releasably thereon. The plug connection according to the present invention shown in detail infigure 5 comprises aplug 106 which can be placed through a drilledhole 104, after whichreleasable plate 102 is fastened tobottom plate 99 andmother plate 100 by arranging ascrew 108 inplug 106.Bottom plate 99 andmother plate 100 can be manufactured integrally. In contrast to thescrew connections 40 known from the prior art (figure 1 ), the plug connection according to the present invention has the advantage that anold plug 106 can easily be removed and replaced with anew plug 106. Time-consuming operations, such as retapping ascrew thread 42 after a rust-boundscrew 40 has been drilled out, are avoided with the plug connection according to the invention. The period of time for which the mould container press is unavailable for the production of bricks can therefore be reduced considerably. - It is noted that in a preferred embodiment the
plug 106 also extends at least throughmother plate 100 to the interface betweenmother plate 100 andreleasable plate 102, or even to the upper surface of releasable plate 102 (position a infigure 5 ). This has the advantage that, when the screw connection ofplug 106 is used to secure protrusions (not shown), so-called frogs, to be arranged inmould container 54, plug 106 ensures the position ofmother plate 100 relative to fixedbottom plate 99 whilescrew 108 is temporarily removed. It is of course also possible to envisage an application wherein the plug extends to the interface between fixedbottom plate 99 and mother plate 100 (position b infigure 5 ). - A brick
length correction plate 98 can further be arranged on upright wall 56 (figures 2 and3 ). This bricklength correction plate 98 comprises a plate which is fixed againstwall 56 inmould container 54. The length dimension of the green brick (not shown) to be arranged inmould container 54 is reduced by the thickness ofcorrection plate 98. The size of the green bricks to be formed can be corrected by the simple operation of arranging such acorrection plate 98 in eachmould container 54. This correction is for instance desirable so as to anticipate the shrinking behaviour of the clay during the drying and firing by adjusting the size of the green brick beforehand to the measure of shrinkage expected during drying and firing of the respective clay composition. Because only a few plates have to be placed, removed or exchanged according to the present invention, a correction of the size of the green brick can be realized in relatively simple manner and at low cost. Suitable materials forcorrection plate 98 are for instance wood, plastic and metal. - Although they show preferred embodiments of the invention, the above described embodiments are intended only for the purpose of illustrating the present invention and not to limit the scope of the invention in any way. It is particularly noted that the skilled person can combine technical measures of the different embodiments. The scope of the invention is therefore defined solely by the following claims.
Claims (15)
- Device, comprising:- a mould container part with at least one mould container for forming therein a green brick from clay;- an ejecting device for pressing out of the mould container the green brick to be formed in the mould container, the ejecting device comprising:- an ejector base;- wherein an insert plate is arranged on the ejector base, which plate is connected to the ejector base with a plug and screw connection.
- Device as claimed in claim 1, the ejecting device further comprising:- an ejector shaft which is connected to the ejector base with a first outer end and is provided with a stop at a second outer end; and- tensioning means which are arranged around the ejector shaft and which can be engaged with the stop; and- wherein the mould container part comprises an opening through which it is possible to displace the ejecting device with its shaft having tensioning means arranged therearound and stop; and- wherein an intermediate member can be arranged and removed between the tensioning means and the opening in the mould container part.
- Device as claimed in claim 2, wherein the intermediate member is adapted, in the situation arranged between the tensioning means and the opening, to function as stop for the at least slightly biased tensioning means.
- Device for pressing a green brick out of a mould container, comprising:- an ejector base;- wherein an insert plate is arranged on the ejector base, which plate is connected to the ejector base with a plug and screw connection.
- Device as claimed in claim 4, further comprising:- an ejector shaft which is connected to the ejector base with a first outer end and is provided with a stop at a second outer end; and- tensioning means which are arranged around the ejector shaft and which can be engaged with the stop.
- Device as claimed in any of the claims 2, 3 or 5, wherein the ejector shaft is connected in fixed manner to the ejector base.
- Device as claimed in claim 6, wherein the ejector shaft is provided with a screw thread at least on its outer end remote from the ejector base.
- Device as claimed in any of the claims 2, 3, 5-7, wherein the ejector shaft comprises a bolt which is attached in fixed manner to the ejector base with a head end of the bolt.
- Device as claimed in any of the claims 2, 3, 5-8, wherein the tensioning means comprise a compression spring arranged around the ejector shaft.
- Device as claimed in any of the claims 2, 3, 5-9, wherein the stop comprises at least a nut arranged on the screw thread.
- Ejecting device as claimed in any of the claims 4-10, wherein the insert plate comprises a rubber plate.
- Device for manufacturing green bricks from clay for the brick manufacturing industry, comprising:- a circulating conveyor carrying mould container parts with one or more mould containers;- a reservoir for clay arranged above the mould containers;- clay arranging means for arranging clay from the reservoir in the mould containers;- means for covering an open side of the mould containers with take-off plates;- at least one ejecting device arranged on the conveyor and movable relative to the conveyor;- wherein the ejecting device is adapted to eject a green brick present in the mould container onto an associated take-off plate during a release stage; and- wherein an insert plate is arranged on the ejector base, which plate is connected to the ejector base with a plug and screw connection.
- Method for fixing an insert plate to an ejector base, comprising the following steps of:- positioning the insert plate on the ejector base such that holes arranged in the insert plate are aligned with holes arranged in the ejector base;- placing a plug through the aligned holes; and- arranging a screw in the plug in order to fix the insert plate to the ejector base.
- Method as claimed in claim 13, preceded by the steps of:- removing from the ejector base an insert plate to be replaced; and- removing from the hole in the ejector base a plug with which the insert plate to be replaced has been fixed.
- Method as claimed in either of the claims 13 or 14, wherein a device according to any of the claims 1-12 is applied.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1034930A NL1034930C2 (en) | 2008-01-18 | 2008-01-18 | Device with improved stamping device and methods thereof. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2085199A1 true EP2085199A1 (en) | 2009-08-05 |
EP2085199B1 EP2085199B1 (en) | 2014-01-15 |
Family
ID=39942971
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09075035A Withdrawn EP2087977A3 (en) | 2008-01-18 | 2009-01-19 | Device with improved mould cavity, and container part provided therewith |
EP09702251A Active EP2242627B1 (en) | 2008-01-18 | 2009-01-19 | Device with improved ejecting device and method therefor |
EP09075033.2A Active EP2085199B1 (en) | 2008-01-18 | 2009-01-19 | Device with improved ejecting base and method for fixing an insert plate |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09075035A Withdrawn EP2087977A3 (en) | 2008-01-18 | 2009-01-19 | Device with improved mould cavity, and container part provided therewith |
EP09702251A Active EP2242627B1 (en) | 2008-01-18 | 2009-01-19 | Device with improved ejecting device and method therefor |
Country Status (5)
Country | Link |
---|---|
EP (3) | EP2087977A3 (en) |
AT (1) | ATE521464T1 (en) |
ES (2) | ES2368026T3 (en) |
NL (1) | NL1034930C2 (en) |
WO (1) | WO2009091244A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104959540A (en) * | 2015-07-03 | 2015-10-07 | 南京禄口汽车配件厂 | Composite machining die for switch shaft aluminum post |
WO2015183091A1 (en) * | 2014-05-28 | 2015-12-03 | Beheermaatschappij De Boer Nijmegen B.V. | Mould container part for the manufacture of bricks slips, mould container pressing device and method for application thereof |
NL2013930B1 (en) * | 2014-05-28 | 2016-05-03 | Beheermaatschappij De Boer Nijmegen B V | Mold container part for the manufacture of brick slips, mold container press device and method for the use thereof. |
NL2012937B1 (en) * | 2014-06-03 | 2016-06-22 | Beheermaatschappij De Boer Nijmegen B V | Ejection device, as well as mold container part and mold container press device provided therewith. |
CN111002440A (en) * | 2019-10-15 | 2020-04-14 | 朱进 | Bridge apron mould with adjustable size of improving production efficiency |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2017672B1 (en) * | 2016-10-25 | 2018-05-04 | Beheermaatschappij De Boer Nijmegen B V | Device with improved ejectors and method for this |
CN114474820B (en) * | 2021-12-16 | 2024-01-09 | 徐州启峰智能科技有限公司 | Punch press is used in production of 5G basic station communication spare |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19506614A1 (en) * | 1995-02-24 | 1996-09-05 | Hiesl Gerhard Ing Grad | Fixing pressure plates on to precast concrete block maker |
EP0917938A1 (en) | 1997-11-21 | 1999-05-26 | Beheermaatschappij De Boer Nijmegen B.V. | Device for forming green bricks for the brick manufacturing industry |
DE102006026117A1 (en) * | 2006-06-03 | 2007-12-06 | Kobra Formen Gmbh | Arrangement for the production of concrete blocks, pressure plate for such an arrangement and method for producing such a pressure plate |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE260742T1 (en) * | 1999-12-29 | 2004-03-15 | Ind Pica S P A | SYSTEM AND MOLDS WITH INTERCHANGEABLE BASE PLATES FOR PRODUCING STONE MOLDS |
NL1026193C2 (en) * | 2004-05-13 | 2005-11-15 | Beheermij De Boer Nijmegen Bv | Device for the production of green bricks. |
-
2008
- 2008-01-18 NL NL1034930A patent/NL1034930C2/en not_active IP Right Cessation
-
2009
- 2009-01-19 EP EP09075035A patent/EP2087977A3/en not_active Withdrawn
- 2009-01-19 ES ES09702251T patent/ES2368026T3/en active Active
- 2009-01-19 EP EP09702251A patent/EP2242627B1/en active Active
- 2009-01-19 AT AT09702251T patent/ATE521464T1/en not_active IP Right Cessation
- 2009-01-19 ES ES09075033.2T patent/ES2458505T3/en active Active
- 2009-01-19 EP EP09075033.2A patent/EP2085199B1/en active Active
- 2009-01-19 WO PCT/NL2009/000007 patent/WO2009091244A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19506614A1 (en) * | 1995-02-24 | 1996-09-05 | Hiesl Gerhard Ing Grad | Fixing pressure plates on to precast concrete block maker |
EP0917938A1 (en) | 1997-11-21 | 1999-05-26 | Beheermaatschappij De Boer Nijmegen B.V. | Device for forming green bricks for the brick manufacturing industry |
DE102006026117A1 (en) * | 2006-06-03 | 2007-12-06 | Kobra Formen Gmbh | Arrangement for the production of concrete blocks, pressure plate for such an arrangement and method for producing such a pressure plate |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015183091A1 (en) * | 2014-05-28 | 2015-12-03 | Beheermaatschappij De Boer Nijmegen B.V. | Mould container part for the manufacture of bricks slips, mould container pressing device and method for application thereof |
NL2013930B1 (en) * | 2014-05-28 | 2016-05-03 | Beheermaatschappij De Boer Nijmegen B V | Mold container part for the manufacture of brick slips, mold container press device and method for the use thereof. |
NL2012937B1 (en) * | 2014-06-03 | 2016-06-22 | Beheermaatschappij De Boer Nijmegen B V | Ejection device, as well as mold container part and mold container press device provided therewith. |
CN104959540A (en) * | 2015-07-03 | 2015-10-07 | 南京禄口汽车配件厂 | Composite machining die for switch shaft aluminum post |
CN111002440A (en) * | 2019-10-15 | 2020-04-14 | 朱进 | Bridge apron mould with adjustable size of improving production efficiency |
Also Published As
Publication number | Publication date |
---|---|
EP2242627A1 (en) | 2010-10-27 |
WO2009091244A1 (en) | 2009-07-23 |
ES2368026T3 (en) | 2011-11-11 |
EP2087977A2 (en) | 2009-08-12 |
EP2087977A3 (en) | 2009-11-18 |
EP2242627B1 (en) | 2011-08-24 |
ES2458505T3 (en) | 2014-05-05 |
ATE521464T1 (en) | 2011-09-15 |
EP2085199B1 (en) | 2014-01-15 |
NL1034930C2 (en) | 2009-07-21 |
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