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
  • B28B7/0002—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
• • 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
  • B28B1/00—Producing shaped prefabricated articles from the material
  • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
  • B28B1/081—Vibration-absorbing means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
  • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
  • B30B15/022—Moulds for compacting material in powder, granular of pasta form
• • 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
  • B28B7/24—Unitary mould structures with a plurality of moulding spaces, e.g. moulds divided into multiple moulding spaces by integratable partitions, mould part structures providing a number of moulding spaces in mutual co-operation

Definitions

• the invention relates to a mold for producing molded parts on a vibrating table according to the preamble of claim 1.
• a mold for producing concrete parts is known from EP 0 738 204 B1, which is provided for mounting on a vibrating table.
• This mold consists of a multiplicity of identical mold boxes which are arranged in a mold frame, the spaces between the individual mold boxes and the mold frame being filled with cast-in material which has elastic properties.
• a disadvantage of such a mold is that the mold boxes are held in the mold frame solely by the elastic material, and the mold boxes located in the central region of the mold counteract more easily let the mold frame move as the mold boxes lying in the edge areas.
• complex devices are required for the production of the mold in order to hold the mold boxes in position during the production process.
• a vibrating mold which consists of a mold frame connected to a molding machine and an insert with mold nests mounted therein.
• the mold frame and insert with projections and depressions interlock, with damping means being arranged between the opposing surfaces of cooperating projections and depressions.
• damping means being arranged between the opposing surfaces of cooperating projections and depressions.
• the invention is based on the object of developing a mold for the production of molded parts on a vibrating table which has a simple geometry, is easy to manufacture and can be assembled and yet reliably prevents the mold insert from being released from the mold frame and thus meets the highest safety requirements ,
• the mold according to the invention has at least one securing element which penetrates the space between the mold frame and the mold insert and is mounted with play in the mold frame and / or in the mold insert.
• This provides operational and handling security, which reliably prevents the mold insert from falling out of the mold frame or lowering the mold insert relative to the mold frame, without assuming an active function during operation or when handling the mold or influencing the vibration behavior of the mold , Due to the almost stress-free mounting of the securing element between the mold insert and the mold frame, the functionality of the securing element is most likely to be ensured in an emergency. This careful storage of the securing element thus also makes it possible to dimension the securing element small and inexpensively, since this is not subject to permanent loads which reduce the service life in everyday life.
• a special embodiment provides for the securing element to be freely floating in the mold insert and / or in the mold frame, with play in all spatial directions.
• Such a mounting of the securing element can be achieved, for example, by completely encasing the securing element with a vibration-damping material, for example a foam.
• the advantage of a bearing which has play in all spatial directions is that the securing element does not require any special adaptation to the mold insert or the mold frame. A necessary adjustment is easily possible through the damping material that surrounds the securing element.
• a further special embodiment provides for the degrees of freedom which are required for play-free mounting of the securing element to be distributed over the mold insert and the mold frame. This makes it possible to distribute the processing effort for the mold over the mold insert and the mold frame, since both components provide at least one degree of freedom.
• the invention further provides for the securing element to be able to be pushed in and pushed out in a recess or under a shoulder which is formed on the mold insert or on the mold frame.
• the securing element can be pushed onto a projection and from a projection to be removable. This enables a "form fit" with play to be realized in a simple manner, which makes operational security possible against undesirably large movements.
• a special embodiment of the invention provides that a securing bolt is used as the securing element, which preferably has a threaded section at least in some areas and is rotatably mounted about this in a threaded hole provided in the mold frame.
• a securing bolt like the threaded bore that receives it, can be produced inexpensively and allows simple, sensitive adjustment.
• the invention provides for securing the securing element against a change in the position of the first securing element by means of a further securing element. This guarantees that a specified game is maintained even over longer operating times.
• the second securing element is designed as a lock nut, which can be fixed against the mold frame by means of a thread on the securing bolt and which causes the securing bolt to be braced against the mold frame.
• a lock nut which can be fixed against the mold frame by means of a thread on the securing bolt and which causes the securing bolt to be braced against the mold frame.
• a special embodiment of the subject matter of the invention provides for the securing element to be provided with a conical tip which enters a conical bore in the mold insert.
• the invention provides for an approximately rectangular, vertically standing region of the gap, seen in cross section, which neither the mold frame nor the mold insert penetrates.
• the mold insert and the mold frame are kept at a distance such that the mold frame can be inserted or removed in a direction perpendicular to the support surface of the mold without touching it. This makes it possible to form the mold frame and the mold insert in one piece and thus inexpensively.
• An embodiment variant of the invention provides for the space between the mold frame and the mold insert to be filled at least in regions with a vibration damping means which is preferably injected and forms an adhesive connection with these components on the contact surfaces with the mold frame and the mold insert.
• a vibration damping means which is preferably injected and forms an adhesive connection with these components on the contact surfaces with the mold frame and the mold insert.
• the securing elements are used as centering aids, which hold the mold insert in a predetermined position with respect to the mold frame. This makes it possible to dispense with complex devices for centering the mold insert in the mold frame and to make the manufacturing process inexpensive.
• the invention provides for the securing elements to be disengaged from the mold during maintenance or disassembly of the mold insert. This makes it possible, without the risk of a collision, to press the mold insert out of the mold frame or to cut the mold insert out of the mold frame by cutting through the vibration damping means.
• the mold insert is pushed in and out of a recess in the mold frame by a linear movement. This enables quick and inexpensive installation.
• FIG. 1 shows a perspective view of a mold frame
• FIG. 2 shows a perspective view of a mold insert
• FIG. 2a shows a side view of the mold frame shown in FIG. 2 from an arrow direction Ha
• FIG. 3 shows a section of the mold frame shown in FIG. 1 in a cut-away view
• FIG. 4 shows a section through the mold frame shown in FIG. 1 along the section line IV-IV,
• FIG. 5 shows an enlarged detail from the sectional illustration shown in FIG. 4
• FIG. 6 shows a side view from an arrow direction VI on the mold frame shown in FIG. 1,
• FIG. 7 shows a simplified section through a mold composed of the mold frame shown in FIG. 1 and the mold insert shown in FIG. 2 in the region of a securing element
• FIG. 8 shows a section through a second shape
• FIG. 9 shows a section through a third shape
• FIG. 10 shows a section through a fourth shape
• FIGS. 11 to 18 simplified sectional illustration through further shapes
• FIG. 19 shows a section through a further shape
• FIG. 20 shows a section through FIG. 19 along the section line XX-XX
• a mold frame 1 which is part of a mold 2, is shown in a perspective view.
• the molding frame 1 has a rectangular opening 3, which is intended for the use of a mold insert 4 (see FIG. 2).
• the mold frame 1 has strips 5, 6 which are used to guide a filling vehicle (not shown) when the mold 2 is in operation.
• Flanges 7, 8 lie parallel to the strips 5, 6. This is used to fasten the mold frame 1 or the entire mold 2 to a vibrating table (not shown).
• the mold frame 1 furthermore has bores 9 extending in the direction of the arrows x or x 1 and y or y 1 , through which a hardening vibration damping means 10 (see for example FIG. 7) can be injected in the direction of the opening 3.
• FIG. 7 Further bores 11 made on the molding frame 1 in the direction of the arrow x or x 1 are provided for the passage of securing elements 12 (see, for example, FIG. 7).
• FIG. 2 shows the mold insert 4 in a perspective view.
• the mold insert 4 is designed as a one-piece component and has 24 recesses 18, which are provided for the production of moldings, not shown, such as concrete blocks and concrete slabs.
• the mold insert 4 is delimited by the upper side 17, a lower side 19 opposite this and a circumferential outer wall 20.
• Circumferential inner walls 22 form the recesses 18, the inner walls 22 being formed with grooves 23 extending in an arrow direction z or z 1 , which are used to form cams on the shaped parts (not shown).
• FIG. 1 shows the mold insert 4 in a perspective view.
• the mold insert 4 is designed as a one-piece component and has 24 recesses 18, which are provided for the production of moldings, not shown, such as concrete blocks and concrete slabs.
• the outer wall 20 which,
• FIG. 2a shows a side view from an arrow direction Ila on the mold insert 4 shown in FIG.
• the groove 21 which recesses in relation to the outer wall 20, is clearly visible.
• the groove 21 has a groove base 24 which runs parallel to the outer wall 20 and which merges into the outer wall 20 via slopes 25, 26.
• FIG. 3 a section of the mold frame 1 shown in FIG. 1 is enlarged and shown cut open in a corner region 27.
• the groove 14 running concealed in the corner region 27 in FIG. 1 is visible.
• the groove 14 is milled into a one-piece lower beam 29 in the region of transverse legs 28 of the molding frame 1.
• the section through the lower spar 29 continues in the area of one of the bores 11 for one of the securing elements, not shown.
• the bore 11 has, for example, a diameter of 20 mm in an input area 30.
• the bore 11 is designed as a threaded bore 32, which is designed, for example, as an M16 thread.
• the section through a longitudinal leg 33 of the molding frame 1 shows that the groove 14 is guided in the region of the longitudinal leg 33 in a transition region 34 of two longitudinal bars 35, 36.
• FIG. 4 shows a section through the mold frame shown in FIG. 1 along a section line IV-IV or a plan view of the sectional area of the longitudinal leg 33 visible in FIG. 3.
• the groove 14 has a groove base 37 which merges into the inner wall 13 of the mold frame 1 via slopes 38, 39.
• the groove 14 shown in Figure 4 is shown enlarged again.
• the bevels 38, 39 have an opening angle of approximately 120 ° to the groove base 37.
• a section of the groove base 37 of the groove 14 is formed by a weld 40, by means of which the longitudinal bars 35, 36 are fixed to one another.
• FIG. 6 shows a side view of the mold frame 1 shown in FIG. 1 from the direction of arrow VI. In this illustration, the bore 11 passing through the cross member 29 can be seen, which opens into the groove 14.
• FIG. 7 shows a section of the mold 2 assembled from the mold frame 1 known in FIG. 1 and the mold insert 4 known from FIG. 2 in a sectional illustration.
• the mold frame 1 and the mold insert 4 face each other with the inner wall 13 and the outer wall 20.
• the free space 41 forms a gap 42 running in the direction of the arrow z or z 'or perpendicular to an underside 19 or support surface of the mold insert 4.
• the gap 42 has one in the region of the opposite grooves 14, 21 of the mold frame 1 and the mold insert 4 Thickening 43 from a gap width a to a gap width b.
• the securing element 12 which is designed as a securing bolt 44 with a threaded section 45, passes through the space 41 into a recess 46 made in the mold insert 4.
• the securing bolt 44 has the shape of a cone 48 in an end region 47. In an end region 49 of the securing bolt 44 opposite the end regions 47 this has a further thread 50, which is provided for guiding a lock nut 51. With this lock nut 51, the securing bolt 44 can be fixed in a desired position on the molding frame 1 and thus secured against a change in the desired position.
• FIG. 7 the recess 46 in the mold insert 4 and the end region 47 of the securing bolt 44 are shown enlarged.
• Such positioning of the mold insert 4 is provided in the manufacture of the mold 1 at the point in time at which the vibration damping means 10 is introduced into the free space 41.
• the free space 41 can then be sprayed out with a vibration damping means 10.
• the vibration damping means 10 is pressed through the bores 9 (see FIG. 1) into the free space 41. Escaping the vibration damping means 10 from the bores 11 (see FIG. 1) is prevented by the screwed-in securing elements 12, which at least partially hold the mold insert 4 in position relative to the mold frame 1.
• the securing elements 12 for the transport of the finished form 2, it is possible to use the securing elements 12 in the described To leave the clamping position.
• the mold insert 4 can freely swing in relation to the mold frame 1 in all spatial directions in the region of the set play, without the securing element 12 being subject to any significant load.
• FIG. 8 shows a section from a second mold 2 in a sectional view.
• a free space 41 which is designed as a gap 42 with a continuous width a.
• the gap 42 is filled with a vibration damping means 10, which has a large-area adhesive connection with an inner wall 13 of the mold frame 1 and an outer wall 20 of the mold insert 4.
• a securing bolt 44 with a thread 45 is mounted as a securing element 12 in a bore 11 of the mold frame 1, which is designed as a threaded bore 32.
• the securing bolt 44 penetrates the vibration damping means 10 in the region of a groove 21 formed in the mold insert 4.
• the groove 21 is filled with an elastic material 54, for example a rubber, and is sealed off from the vibration damping means 10 by a membrane 55 covering the groove 21.
• the rubber-supported membrane 55 in this way allows the securing bolt 44 with an end region 47 to penetrate into the groove 21.
• the securing element 12 acts as a fall-through protection , which allows a maximum sagging of the mold frame 1 or the mold insert 4 by a distance c until the securing bolt 44 rests in its end region 47 on an edge 25 or 26 of the groove 21.
• FIG. 9 shows a section of a third form 2 in a sectional view.
• the mold insert 4 has a groove 21 to an outer wall 20, which lies opposite a projection 56 which is formed on an inner wall 13 of the mold frame 1.
• the mold insert 4 is positioned opposite the mold frame 1 in such a way that a top surface 57 of the projection 56, which runs parallel to the outer wall 20 of the mold insert 4, is at a distance d from the latter. The distance d between the two surfaces 57, 20 allows the mold insert 4 to be removed from the mold frame 1 in a direction z or z 'for assembly and disassembly.
• a securing element 12 is slidably mounted, which engages in a recess 46 of the mold insert 4 in a known manner, the securing element 12 not resting on the mold insert 4 in the operating position shown in FIG. 9, but having all-round play.
• Figure 10 shows a section of a fourth form 2 in a sectional view.
• the vibration damping means 10 lies in a gap 42 of constant width a between a mold frame 1 and a mold insert 4.
• a securing element 12 with an end region 47 engages in a recess 46 executed in the mold insert 4, whereby there is all-round play between the securing element 12 and the mold insert 4.
• the locking element 12 is secured by a lock nut 51 against unwanted displacement.
• FIGS. 11 to 18 show further design variants for the formation of a free space 41 between a mold frame 1 and a mold insert 4 of a mold 2. It is common to all design variants that the mold frame 1 and the mold insert 4 can be displaced relative to one another in the arrow directions z, z 1 without touching one another. That is, the closest opposing surfaces 58, 59 of the mold frame 1 and the mold insert 4 are at least at a distance d from one another, which allows the mold insert 4 to be removed from the mold frame 1 without collision.
• the embodiment variants shown in FIGS. 11 to 13 are optimized so that, with a minimal gap volume, a large contact area between the mold frame 1 and the one not shown
• FIGS. 17 and 18 finally show design variants of molds 2, which allow greater freedom of vibration for the mold insert 4 due to the larger gap widths. Furthermore, the design variants shown in FIGS. 17 and 18 are also suitable for the use of a vibration damping agent with a lower hardness.
• FIG. 19 shows a section through a further shape 2. The section is shown in an edge area in which a mold frame 1 and a mold insert 4 with an inner wall 13 and an outer wall 20 lie opposite one another. Between the inner wall 13 and the outer wall 20 there is a free space 41 which runs around the mold insert 4 and which is filled by a vibration damping means 10.
• FIG. 20 shows a section through FIG. 19 along the section line XX-XX. In this view, the lattice-like arrangement of the vibration damping means 10 between the mold frame 1 and the mold insert 4 is visible.
• FIG. 21 shows a section through the shape 2 shown in FIGS. 19 and 20, which shows the arrangement of a securing element 12.
• the securing element 12 which is designed as a securing bolt 44 with two threaded sections 45, 60, passes through the space 41 into a recess 46 made in the mold insert 4.
• the recess 46 is designed as a threaded bore 61.
• the securing element 12 serves as a tension screw 62, which pulls the mold insert 4 onto the mold frame 1.
• the securing element 12 is screwed with its threaded portion 60 into the threaded bore 61 made in the mold insert 4.
• the securing element 12 is supported on the molding frame 1 via a lock nut 51 which is screwed onto the threaded section 45. Between the lock nut 51 and the mold frame 1, a damping means 63 is arranged, which decouples the securing means 12 from the mold frame 1, through which this is guided with play.
• FIG. 22 shows a further securing means 12 for use in the form 2 shown in FIGS. 19 and 20. This is a pressure screw 64 which is screwed to the mold frame 1 with a threaded section 45 and presses against the mold insert 4 with the interposition of a membrane 55.
• a further securing means 12 for use in the form 2 shown in FIGS. 19 and 20 is shown in FIG. This in turn is a pressure screw 64 which is screwed to the mold frame 1 with a threaded section 45 and presses onto the mold frame 4 with a rounded pressure surface 65.
• FIGS. 24 and 25 show further sections through further shapes 2 in the area of securing means 12.
• the securing means 12 are designed as lag screws 62 and each have two threaded sections 45, 60. With the threaded portion 60, the lag screws 62 are each screwed to the mold insert 4.
• the tension screws 62 are guided with play and are elastically supported on this by the interposition of damping means 63, a lock nut 51 serving for support, which interacts with the threaded section 45.
• the damping means 63 is designed as an oscillating bush 66.
• the invention is not restricted to the exemplary embodiments shown or described. Rather, it encompasses further developments of the invention within the scope of the property right claims.
• the invention also provides to fill the free space between the mold frame and the mold insert with damping means only in some areas. Furthermore, it is provided to use damping means of different properties between the mold frame and the mold insert. e list of signs:

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• 2003
  • 2003-04-02 DK DK03727166T patent/DK1509374T3/da active
  • 2003-04-02 EP EP03727166A patent/EP1509374B1/fr not_active Expired - Lifetime
  • 2003-04-02 WO PCT/DE2003/001070 patent/WO2003092973A1/fr active IP Right Grant
  • 2003-04-02 DE DE10314863A patent/DE10314863A1/de not_active Withdrawn
  • 2003-04-02 CA CA2482791A patent/CA2482791C/fr not_active Expired - Fee Related
  • 2003-04-02 DE DE50302293T patent/DE50302293D1/de not_active Expired - Lifetime
  • 2003-04-02 AT AT03727166T patent/ATE316453T1/de active
• 2004
  • 2004-10-25 US US10/972,960 patent/US7290752B2/en not_active Expired - Fee Related

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