EP0063039A2 - Improvements in and relating to tile making machines - Google Patents
Improvements in and relating to tile making machines Download PDFInfo
- Publication number
- EP0063039A2 EP0063039A2 EP82301872A EP82301872A EP0063039A2 EP 0063039 A2 EP0063039 A2 EP 0063039A2 EP 82301872 A EP82301872 A EP 82301872A EP 82301872 A EP82301872 A EP 82301872A EP 0063039 A2 EP0063039 A2 EP 0063039A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- carriage
- sensor
- cutter
- pallet
- mechanism according
- 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
- 239000004568 cement Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion 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
- B28B5/00—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping
- B28B5/02—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type
- B28B5/026—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length
- B28B5/028—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping on conveyors of the endless-belt or chain type the shaped articles being of indefinite length the moulding surfaces being of definite length, e.g. succession of moving pallets, and being continuously fed
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/14—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting
- B28B11/16—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting for extrusion or for materials supplied in long webs
- B28B11/163—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting for extrusion or for materials supplied in long webs in which the cutting device is moved longitudinally with the moving strand
- B28B11/165—Apparatus or processes for treating or working the shaped or preshaped articles for dividing shaped articles by cutting for extrusion or for materials supplied in long webs in which the cutting device is moved longitudinally with the moving strand mounted on a carrier
Definitions
- This invention is concerned with improvements in and relating to machines for making roofing tiles.
- a number of forms of cutting mechanism are known but one which is widely used comprises a knife carriage movable along a path parallel with the path of the stream of pallets.
- the knife which extends transversely of the path of the stream, is actuated to move up and down on the carriage.
- the knife carriage is reciprocally driven, suitably from a crank coupled to the driving mechanism which advances the stream of pallets. That driving mechanism operates to engage the under or rear face of each successive pallet offered to it and the knife carriage drive and the knife actuating mechanism are. operable in synchronism with the pallet driving mechanism.
- the carriage and therefore the knife By reciprocating the knife carriage, the carriage and therefore the knife, can be brought to travel parallel with, in the same direction and at the same speed as the stream and hence the extruded ribbon and with the knife above abutting ends of two pallets.
- the knife then operates and cuts the ribbon, is raised and the knife carriage reverses to be repositioned I for the next stroke.
- the knife carriage may carry a pin for creating a nail hole used when hanging a tile, and this will reciprocate with the knife to penetrate the ribbon.
- the carriage may carry two parallel knives reciprocable together to simultaneously cut the ribbon at both ends of a pallet.
- a cutting mechanism for cutting an extruded ribbon of mix carried on a stream of end-to-end pallets in a machine for making tiles, the cutting mechanism comprising a knife carriage reciprocable along a path parallel with the path of the stream, means to reciprocate the carriage, a sensor mechanism on the carriage and movable relative to the carriage toward and away from the path of the stream between a first position in which a sensor is in the path of a forwardly directed face of a pallet and a second position in which the sensor lies out of the path of such face, at least one knife on the carriage movable toward and away from the path to effect a cutting action on the ribbon, and movable so as to vary the position of the knife blade longitudinally of the carriage, the sensor being displaceable longitudinally relative to the carriage by the face on the pallet and means being provided by which the knife is adjusted longitudinally of the carriage in accordance with the position of the sensor.
- the stream will pass beneath a hopper 7 of mix and a roller 8 will with the upper pallet faces form a ribbon of mix whose upper surface is of constant contour longitudinally, set by the shape of the roller and whose underface is moulded by the upper faces of the pallets.
- the continuous stream and ribbon pass thereafter to a cutting station 9 where a pair of parallel knives 10,11 extending across the ribbon will cut the ribbon in register with abutting pallet end faces.
- the knives are mounted for vertical reciprocal motion on a knife carriage 12 and are driven by jacks 14 and carriage 12 is mounted for horizontal reciprocal motion on guides 15 by means of a driving rod 16 coupled to a crank 17 driven by the pallet drive mechanism so that the knives will be movable in a direction parallel to the ribbon and achieve ribbon speed at a moment when control valves actuate the knife jacks and each knife is in register with a pair of abutting pallet ends.
- a double Roman tile ' is being produced and two pins 18, vertically reciprocal with the knives, are provided to make nail holes in the ribbon.
- each knife is in register with the abutting faces of a pair of adjacent pallets in the stream.
- the cutting edges of the knives are adjustably mounted longitudinally of their carriage either by making the knives adjustable along guides or by making the knives pivotal.
- the knives can be caused to be positioned in accordance with the sensor position and thereby accurately relative to the pallet and thereby the end faces thereof.
- FIG. 3 One arrangement can be understood from Figure 3 where the pallet stream is shown running left to right.
- the knives 10,11 are pivotable at 20,21, are coupled by a link 22 and are biased clockwise by a spring 23.
- a sensor carriage 24 is mounted on the knife carriage 12 and is movable relative to that carriage by a jack 25, which, because the sensor carriage is mounted on tracks 26 inclined relative to the knife carriage, will result in the sensor carriage not only moving longitudinally relative to the knife carriage but also vertically relative thereto.
- a sensor 28 is pivotally mounted on the sensor carriage, is spring biased anticlockwise as viewed in Figure 3 and is set by a stop 29.
- Extending between the sensor 28 and a knife adjustment member 30 pivotally carried on the knife carriage is a Bowden cable 31 so that, if sensor 28 is pivoted clockwise as viewed in Figure 3 against its bias, a corresponding motion will be imparted to the knives anti-clockwise about their pivots 11,12 by the member 30.
- the sensor 28 projects into the path of a suitable face such as leading face 32 of a web 33 on the underface of each pallet, while in the lower condition of sensor carriage 24 the sensor is clear of the pallets.
- a control switch will, in response to a cam track (not shown) on the machine frame, extend jack 25 and will bring the sensor into the path of a face 32 on a pallet.
- the speed of the knife carriage will be such that the face 32 reaches the sensor and displaces it clockwise (as shown).
- the extent of that displacement will be reproduced at the knife edges and since the face 32 is fixed relative to the ends of its pallet, both knives will fall, when actuated, to the end edges of that pallet.
- the jack 25 will retract, take the sensor beneath the pallet path and the knife carriage will stop and then reverse to its starting position. The cycle will repeat.
- the machine and its drive may be of various forms.
- the sensor carriage could be movable simply vertically without the movement longitudinally of the knife carriage. Also where two knives are provided each may have its own adjustment mechanism and sensor.
- the senor is operative to adjust the position of the knife carriage relative to its driving mechanism, for example by adjusting the length of driving rods 16, in response to the detected actual position of each palet.
- the knives are longitudinally fixed relative to the knife carriage and adjustment of the position of each cut is made by adjusting the position of the carriage itself.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Control Of Cutting Processes (AREA)
Abstract
Description
- This invention is concerned with improvements in and relating to machines for making roofing tiles.
- It is known to make roofing tiles by passing a stream of pallets, each having an upper surface corresponding to the shape of the under surface of a tile, in end-to-end abutting relationship beneath an outlet of a hopper in which is a supply of cement mix. Thereby a ribbon of mix is extruded on to the stream of pallets, the upper surface of the ribbon being of transverse profile constant lengthwise of the stream.
- The stream continues from the region of extrusion of the ribbon to a cutting station. A number of forms of cutting mechanism are known but one which is widely used comprises a knife carriage movable along a path parallel with the path of the stream of pallets. The knife, which extends transversely of the path of the stream, is actuated to move up and down on the carriage. The knife carriage is reciprocally driven, suitably from a crank coupled to the driving mechanism which advances the stream of pallets. That driving mechanism operates to engage the under or rear face of each successive pallet offered to it and the knife carriage drive and the knife actuating mechanism are. operable in synchronism with the pallet driving mechanism. By reciprocating the knife carriage, the carriage and therefore the knife, can be brought to travel parallel with, in the same direction and at the same speed as the stream and hence the extruded ribbon and with the knife above abutting ends of two pallets. The knife then operates and cuts the ribbon, is raised and the knife carriage reverses to be repositioned I for the next stroke. As well as carrying a knife, the knife carriage may carry a pin for creating a nail hole used when hanging a tile, and this will reciprocate with the knife to penetrate the ribbon.
- Instead of a single knife the carriage may carry two parallel knives reciprocable together to simultaneously cut the ribbon at both ends of a pallet.
- These arrangements work reasonably satisfactorily but variables in the condition of the stream can occur. Pallets may wear and overall dimensions end-to-end may produce a cumulative error, the mix may vary in consistency resulting in varying end loading on the pallets and hence slight distortion again bringing changes in end-to-end dimensions. Dirt may penetrate between pallet ends with similar result. Therefore the knife when it penetrates the ribbon may be out of register with the abutting pallet ends where the cut should be made. That can result in a tile end rib which is too narrow and therefore not of the specified strength as well as in a tile end being misshapen because the tile which is cut beyond the end of its pallet will have no support when the pallets are separated. Also an exposed tile end overhanging a pallet end is liable to damage by reason of its exposure. Not only will a tile end suffer by virtue of failure of a knife to register with abutting pallet ends, but also the pin to form a nail hole will be out of register with a hole provided in the pallet. This will result in a misshapen pin hole and can result, as will the failure of the knife to register correctly, in the tile not having a neat, accurate appearance when hung, the exposed lower edges having a slightly castellated appearance.
- According to an aspect of this invention there is provided a cutting mechanism for cutting an extruded ribbon of mix carried on a stream of end-to-end pallets in a machine for making tiles, the cutting mechanism comprising a knife carriage reciprocable along a path parallel with the path of the stream, means to reciprocate the carriage, a sensor mechanism on the carriage and movable relative to the carriage toward and away from the path of the stream between a first position in which a sensor is in the path of a forwardly directed face of a pallet and a second position in which the sensor lies out of the path of such face, at least one knife on the carriage movable toward and away from the path to effect a cutting action on the ribbon, and movable so as to vary the position of the knife blade longitudinally of the carriage, the sensor being displaceable longitudinally relative to the carriage by the face on the pallet and means being provided by which the knife is adjusted longitudinally of the carriage in accordance with the position of the sensor.
- In order that the invention may be well understood there will now be described an embodiment thereof given by way of example only, reference being made to the accompanying drawing which is a diagrammatic side elevation of a cutting mechanism for a tile making machine.
- Figure 1 is a diagrammatic side elevation of a tile making machine
- Figure 2 is an end elevation of the machine of Figure 1 viewed from the end nearest to the cutting mechanism, and
- Figure 3 is a diagrammatic side elevation of the cutting mechanism.
- The Figures are to different scales to facilitate illustration.
- The machine illustrated in Figures 1 and 2 is illustrated and described in U.S. Patent No. 3,677,686 and is shown purely as an example of a tile making machine. Suffice it here to say that it includes a main frame 1, to a
track 2 of which pallets 3 (Fig. 2) are fed by a feed conveyor 4. The pallets in the form of a stream of end-to-end pallets are pushed along the track through the machine by a drive mechanism which is indicated at 5, the drive mechanism comprising spaced drive members 6 on a chain which carries each of those members up to a position in which the member engages a rearwardly directed (to the right in Fig. 1) pallet face on the underside of the pallet to thrust that pallet, and thereby those ahead of it, forward. The stream will pass beneath a hopper 7 of mix and aroller 8 will with the upper pallet faces form a ribbon of mix whose upper surface is of constant contour longitudinally, set by the shape of the roller and whose underface is moulded by the upper faces of the pallets. - The continuous stream and ribbon pass thereafter to a cutting station 9 where a pair of
parallel knives knife carriage 12 and are driven byjacks 14 andcarriage 12 is mounted for horizontal reciprocal motion onguides 15 by means of adriving rod 16 coupled to acrank 17 driven by the pallet drive mechanism so that the knives will be movable in a direction parallel to the ribbon and achieve ribbon speed at a moment when control valves actuate the knife jacks and each knife is in register with a pair of abutting pallet ends. In the illustrated example a double Roman tile 'is being produced and twopins 18, vertically reciprocal with the knives, are provided to make nail holes in the ribbon. - As already explained the pallet stream may not always be so accurately positioned that each knife is in register with the abutting faces of a pair of adjacent pallets in the stream.
- To reduce inaccuracy in this respect, the cutting edges of the knives are adjustably mounted longitudinally of their carriage either by making the knives adjustable along guides or by making the knives pivotal. By providing a displaceable sensor on the knife carriage which will be positioned relative to the carriage by a pallet, the knives can be caused to be positioned in accordance with the sensor position and thereby accurately relative to the pallet and thereby the end faces thereof.
- One arrangement can be understood from Figure 3 where the pallet stream is shown running left to right. The
knives link 22 and are biased clockwise by aspring 23. Asensor carriage 24 is mounted on theknife carriage 12 and is movable relative to that carriage by ajack 25, which, because the sensor carriage is mounted ontracks 26 inclined relative to the knife carriage, will result in the sensor carriage not only moving longitudinally relative to the knife carriage but also vertically relative thereto. Asensor 28 is pivotally mounted on the sensor carriage, is spring biased anticlockwise as viewed in Figure 3 and is set by astop 29. Extending between thesensor 28 and aknife adjustment member 30 pivotally carried on the knife carriage is a Bowdencable 31 so that, ifsensor 28 is pivoted clockwise as viewed in Figure 3 against its bias, a corresponding motion will be imparted to the knives anti-clockwise about theirpivots member 30. - In the upper position of
sensor carriage 24 thesensor 28 projects into the path of a suitable face such as leadingface 32 of aweb 33 on the underface of each pallet, while in the lower condition ofsensor carriage 24 the sensor is clear of the pallets. - To operate the cutting mechanism the knife carriage starts at its rearmost position (extreme right hand position in Figure 1). The
crank 17 androd 16 thrust it forward. A control switch, not shown, will, in response to a cam track (not shown) on the machine frame, extendjack 25 and will bring the sensor into the path of aface 32 on a pallet. The speed of the knife carriage will be such that theface 32 reaches the sensor and displaces it clockwise (as shown). The extent of that displacement will be reproduced at the knife edges and since theface 32 is fixed relative to the ends of its pallet, both knives will fall, when actuated, to the end edges of that pallet. At a point determined by the cam track, thejack 25 will retract, take the sensor beneath the pallet path and the knife carriage will stop and then reverse to its starting position. The cycle will repeat. - There may be only a single knife instead of a pair and the machine and its drive may be of various forms. The sensor carriage could be movable simply vertically without the movement longitudinally of the knife carriage. Also where two knives are provided each may have its own adjustment mechanism and sensor.
- In an alternative arrangement (not.shown) the sensor is operative to adjust the position of the knife carriage relative to its driving mechanism, for example by adjusting the length of
driving rods 16, in response to the detected actual position of each palet. With such an arrangement the knives are longitudinally fixed relative to the knife carriage and adjustment of the position of each cut is made by adjusting the position of the carriage itself.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8111179 | 1981-04-09 | ||
GB8111179 | 1981-04-09 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0063039A2 true EP0063039A2 (en) | 1982-10-20 |
EP0063039A3 EP0063039A3 (en) | 1983-08-17 |
EP0063039B1 EP0063039B1 (en) | 1986-12-17 |
Family
ID=10521046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19820301872 Expired EP0063039B1 (en) | 1981-04-09 | 1982-04-08 | Improvements in and relating to tile making machines |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0063039B1 (en) |
DE (1) | DE3274729D1 (en) |
GB (1) | GB2097318B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996039289A1 (en) * | 1995-06-06 | 1996-12-12 | Braas Gmbh | Method and device for controlling the position of a cutting tool during cutting of a continuous strip of plastically deformable material |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB284210A (en) * | 1928-01-19 | 1929-02-21 | Keller & Co G M B H C | A method of and means for automatically depositing bricks cut off at right angles from a continuous bar |
CH182650A (en) * | 1934-10-06 | 1936-02-29 | Frey Ernst | Automatic device for cutting the clay strand supplied by a clay extruder. |
DE2838739A1 (en) * | 1978-09-06 | 1980-03-20 | Lingl Anlagenbau | METHOD AND DEVICE FOR CUTTING BRICK FORMS FROM A STRING PIECE |
AT358452B (en) * | 1976-10-29 | 1980-09-10 | Lingl Anlagenbau | DEVICE FOR CUTTING SOUND STRINGS, ESPECIALLY SPLITTER STRAPS |
-
1982
- 1982-04-08 GB GB8210396A patent/GB2097318B/en not_active Expired
- 1982-04-08 DE DE8282301872T patent/DE3274729D1/en not_active Expired
- 1982-04-08 EP EP19820301872 patent/EP0063039B1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB284210A (en) * | 1928-01-19 | 1929-02-21 | Keller & Co G M B H C | A method of and means for automatically depositing bricks cut off at right angles from a continuous bar |
CH182650A (en) * | 1934-10-06 | 1936-02-29 | Frey Ernst | Automatic device for cutting the clay strand supplied by a clay extruder. |
AT358452B (en) * | 1976-10-29 | 1980-09-10 | Lingl Anlagenbau | DEVICE FOR CUTTING SOUND STRINGS, ESPECIALLY SPLITTER STRAPS |
DE2838739A1 (en) * | 1978-09-06 | 1980-03-20 | Lingl Anlagenbau | METHOD AND DEVICE FOR CUTTING BRICK FORMS FROM A STRING PIECE |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996039289A1 (en) * | 1995-06-06 | 1996-12-12 | Braas Gmbh | Method and device for controlling the position of a cutting tool during cutting of a continuous strip of plastically deformable material |
Also Published As
Publication number | Publication date |
---|---|
EP0063039A3 (en) | 1983-08-17 |
EP0063039B1 (en) | 1986-12-17 |
GB2097318B (en) | 1985-07-24 |
DE3274729D1 (en) | 1987-01-29 |
GB2097318A (en) | 1982-11-03 |
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