EP0186878A1 - Outil pour presse - Google Patents

Outil pour presse Download PDF

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Publication number
EP0186878A1
EP0186878A1 EP85116343A EP85116343A EP0186878A1 EP 0186878 A1 EP0186878 A1 EP 0186878A1 EP 85116343 A EP85116343 A EP 85116343A EP 85116343 A EP85116343 A EP 85116343A EP 0186878 A1 EP0186878 A1 EP 0186878A1
Authority
EP
European Patent Office
Prior art keywords
plate
press
adjusting plate
adjusting
pressing
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
Application number
EP85116343A
Other languages
German (de)
English (en)
Other versions
EP0186878B1 (fr
Inventor
Dietger Ing. Grad. Scholdan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Feldmuehle AG
Original Assignee
Feldmuehle AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Feldmuehle AG filed Critical Feldmuehle AG
Priority to AT85116343T priority Critical patent/ATE38181T1/de
Publication of EP0186878A1 publication Critical patent/EP0186878A1/fr
Application granted granted Critical
Publication of EP0186878B1 publication Critical patent/EP0186878B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a pressing tool with a lower pressing plate which is movable in a vertical direction in a pressing ring, the upper side of which forms a shape for the material to be pressed with the pressing ring, an adjusting plate arranged below the lower pressing plate, on the upper side of which the lower pressing plate rests with its underside and which is adjustable in its inclination to the longitudinal axis of the pressing tool, a base plate arranged below the adjusting plate and connected to the adjusting plate by connecting elements, the upper side of which engages with the underside of the adjusting plate, and an upper pressing plate cooperating with the lower pressing plate.
  • Pressing tools of the type mentioned are known as components of hydraulic presses.
  • the lower press plates are arranged in bushings, the so-called press rings, which are mostly embedded in tool tables.
  • the shape of the compact is determined by the press ring and formed by the upper side of the lower press plate which is movable in the vertical direction in the press ring and which is lowered during the filling process with the material to be pressed.
  • the mold is filled by means of a filling funnel, which is fitted with the material to be pressed and is slidably mounted above the tool table, the lower opening of which runs a short distance above the tool table.
  • the filling funnel has approximately the same width as the tool table, so that the molds attached in the tool table can be filled in a single operation if the filling funnel is guided away over the tool table.
  • a scraper resting on the tool table is attached to the filling funnel and, after the filling process, wipes off the material that protrudes beyond the mold edge in order to achieve a uniform filling of the mold.
  • the tool table is moved under an upper tool provided with corresponding upper press plates. After the pressing process has ended, the upper tool is raised, the tool table is brought into its starting position and the finished compact is ejected from the mold by lifting the lower press plate.
  • the scraper movement of the scraper brings about a higher filling density of the press material in a previously unavoidable manner, especially when processing granular press material in certain areas of the mold. This is usually the area near the edge of the mold over which the stripper travels in the last phase of its stripping motion.
  • uneven compression in certain areas cannot be accepted, for which reference is made, for example, to highly sensitive electronic components and to cutting and grinding wheels, in which extremely small irregularities lead to imbalance.
  • an adjustment plate with an inclination to the longitudinal axis of the press tool is therefore provided below the lower press plate in press tools of the type described. This adjustment plate is connected to a base plate located below the adjustment plate by mostly three screws evenly distributed on it.
  • the screws or bores can be arranged offset by 120 °.
  • one of the screws is arranged so that it lies on an imaginary line which, starting from the center of the circular shape, corresponds to the direction of movement of the scraper.
  • the screw is attached in the edge region of the mold, in which a higher compression results from the stripping movement of the stripper.
  • the present invention seeks these disadvantages loading malli g en and sees its task is to provide a pressing tool available, at which the adjusting plate is adjustable in its inclination to the longitudinal axis of the pressing tool without the complicated removing the lower press plate.
  • the invention provides the characterizing features of claim 1 in a pressing tool of the type described above.
  • the present invention allows the adjustment of the setting plate without removing the lower press plate and thus leads to a drastic reduction in the times previously required for setting up the tools.
  • the adjustment plate of the pressing tool according to the invention can be adjusted in its inclination, so that the filling height of the pressing tool changes at the desired points, which compensates for the higher filling density at these points and thus, for example, the imbalance in the manufacture of a grinding wheel is counteracted.
  • the piston of the lifting device is arranged so that it is directed against the base plate, during the cylinder forming a unit with the adjusting plate which is moved towards the adjustment plate in the direction of the lower press plate.
  • one or more lifting devices are provided in the region of the base plate adjacent to the setting plate, the lifting device works by moving the piston acting on the underside of the setting plate up and down.
  • the present invention provides for the arrangement of a plurality of lifting devices in order to enable the production of such workpieces in special problem cases, in which high uniformity is particularly important, it has proven sufficient for many applications to provide only one lifting device which is expedient is arranged in the mold region near the edge, over which the stripper is guided in the last phase of its stripping movement.
  • the lifting device is arranged in such a way that the center of the lifting device lies on the radius which, starting from the center of the lower pressing tool, is congruent with the direction of movement of the hopper or the scraper.
  • the base plate and adjusting plate are expediently connected by connecting elements, such as screw bolts or hinges.
  • the screw bolts and lifting device are arranged in such a way that the Bolts form the two end points of the base line of an isosceles triangle and the lifting device lies with its center exactly on the perpendicular to the base line of this triangle.
  • the screw bolts In order to have a certain freedom of movement for the adjustment of the adjustment plate, the screw bolts must not be tightened firmly and thus form a tipping point for the adjustment plate.
  • Compression springs preferably in the form of disc springs in recesses, which are provided in the area of the base plate adjacent to the setting plate above the threaded holes, press the setting plate against the screw heads.
  • the screw connection of the base and adjustment plate described above can be replaced by a hinge connection.
  • An arrangement of two individual hinges instead of the described bolts is possible as well as the arrangement of an individual hinge of appropriate length, which is to be fixed around a safe tipping point, preferably with its long side at right angles to a line leading through the center of the lifting device and base plate .
  • An embodiment of the present invention has proven to be particularly suitable, in which the piston of the lifting device acting against the adjusting plate or base plate is not flat on the end face but spherical.
  • the present invention is particularly suitable for the production of compacts, which are made of granular material to be pressed.
  • the present invention is particularly suitable for the production of cutting and grinding wheels.
  • Known hydraulic fluids in particular glycerin, are suitable for filling the hydraulic lifting device.
  • the hydraulic press (20) shown in FIG. 1 can be loaded on both sides.
  • the press rings (18, 18a), in which the lower press plates (19, 19a) are arranged, are let into tool tables (13, 13a).
  • Filling hoppers (14, 14a) are used to fill the molds formed from press rings (18, 18a) and lower press plate (19, 19a).
  • Strippers (15, 15a) are attached to the filling funnels (14, 14a).
  • Press mandrels (40) are used to create a center hole in the manufacture of cutting discs.
  • Figure 2 shows a partially shown tool table (13), in which in the left half of the figure according to the known prior art three screw bolts (16), see.
  • Figure 3 of which screw heads (38) are shown for adjusting the adjustment plate (1) and for fastening it to the base plate (2).
  • a pressing tool according to the invention in which a lifting device (3) opposite in the base plate (2) lying area (17) of the adjusting plate (1) (see FIG. 4) is arranged for adjusting the adjusting plate (1).
  • the inclination of the adjusting plate (1) can be adjusted by actuating the lifting device (3), so that the lower pressing plate (19) (FIG. 4) resting on the adjusting plate (1) also has a different inclination and is thus identified by the arrows Area gives a different fill level of the shape.
  • an arrow A indicates the direction of movement of the hopper and scraper. Screws (16), of which only screw heads (38) are shown (see FIGS.
  • FIG 3 shows a pressing tool (5) according to the known prior art.
  • a press ring (18) is inserted, in which the lower press plate (19), which cooperates with the upper press plate (26), is movable in the vertical direction to eject the compact, not shown, and to change the thickness of the compact .
  • the top (6) of the lower press plate (19) forms together with the press ring (18) the shape for the compact.
  • Below the lower press plate (19) the adjustment plate (1) is arranged, on the upper side (4) of the press plate (19) with its underside (41). Underneath is the base plate (2), the top (29) of which engages with the bottom (34) of the adjustment plate (1) via compression springs (disc springs).
  • Magnets (23) connect the lower press plate (19) and the adjusting plate (1) in order to enable a safe lowering of the lower press plate (19) even if particles of the material to be pressed have reached between the press ring (18) and the lower press plate (19) .
  • the lower press plate (19) must be dismantled, by loosening or tightening the screw bolts (16), the angle a that the level formed by the upper end face (4) of the adjustment plate (1) with Longitudinal axis L of the press tool (5) forms to be able to adjust.
  • the bolts (16) are screwed into threaded holes (25) in the base plate (2).
  • the compression springs (24) in recesses (27) press the setting plate (1) against the screw heads (38).
  • the base plate (2) rests on a lifting plate (22) which is guided in columns, not shown. There is a small gap between the press ring (18) and the side edges of the lower press plate (19) to prevent the lower press plate (19) from jamming in the press ring (18) when its inclination is changed via the setting of the adjusting plate (1) .
  • the pressing tool (5) according to the invention shown in FIG. 4 is distinguished from the device shown in FIG. 3 by a lifting device (3) which is arranged in the region (17) of the adjusting plate (1) opposite the base plate (2) is not.
  • the lifting device (3) is actuated with the master cylinder (8) shown in FIG. (6) via the hose / pipe (7).
  • a closable bore (28) serves to vent the lifting device (3).
  • the lifting device (3) consists essentially of a piston (30) and a cylinder (31) in which the piston (30) presses against the upper side (29) of the base plate (2).
  • the seal between the cylinder (31) and piston (30) is made by sealing rings (32).
  • the pressure of the piston (30) creates a wedge gap between the adjusting plate (1) and the base plate (2) at the point marked with an arrow S.
  • the angle ⁇ is adjusted, which is formed by the plane formed from the upper side (4) of the adjusting plate (1) and the longitudinal axis L of the pressing tool.
  • Magnets (23), only one of which is shown, connect the adjusting plate (1) and the lower press plate.
  • Screw bolts (16), of which only one is also shown, serve as in the known pressing tool to connect the adjusting plate (1) and base plate (2), but are not tightened as in the known pressing tools, so that a certain freedom of movement for the Adjustment of the adjustment plate is given.
  • the functions of the lifting plate (22) and the upper press plate (26) correspond to the embodiment of the known press tool described in FIG. 3.
  • FIG. 5 shows a further embodiment of a pressing tool according to the invention, in which the lifting device (3) is arranged in the region (33) of the base plate (2) opposite the setting plate (1) is not.
  • the piston (30) presses against the underside (34) of the adjusting plate (1) and thereby causes a different inclination of the adjusting plate (1) or the lower pressing plate resting thereon.
  • this embodiment of the pressing tool corresponds to the embodiment described for FIG. 4.
  • the master cylinder (8) shown in FIG. 6 consists of a cylinder housing (11) and a piston (10) which can be adjusted in the cylinder housing against the pressure of the spring (9).
  • the piston (10) is adjusted by means of a threaded screw (12).
  • a connection point (36) is used to connect the hose / pipe (7).
  • a closable bore (39) is provided for ventilation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP85116343A 1984-12-29 1985-12-20 Outil pour presse Expired EP0186878B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85116343T ATE38181T1 (de) 1984-12-29 1985-12-20 Presswerkzeug.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843447831 DE3447831A1 (de) 1984-12-29 1984-12-29 Presswerkzeug
DE3447831 1984-12-29

Publications (2)

Publication Number Publication Date
EP0186878A1 true EP0186878A1 (fr) 1986-07-09
EP0186878B1 EP0186878B1 (fr) 1988-10-26

Family

ID=6254130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85116343A Expired EP0186878B1 (fr) 1984-12-29 1985-12-20 Outil pour presse

Country Status (4)

Country Link
EP (1) EP0186878B1 (fr)
AT (1) ATE38181T1 (fr)
DE (2) DE3447831A1 (fr)
ES (1) ES8703772A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2165358C1 (ru) * 1999-08-03 2001-04-20 Московский государственный технологический университет "СТАНКИН" Механический пресс для объемной штамповки с секторным исполнительным механизмом
CN102794926A (zh) * 2011-05-25 2012-11-28 来安县隆华摩擦材料有限公司 离合器面片一次性成型模具
CN115703151A (zh) * 2021-08-10 2023-02-17 横店集团东磁股份有限公司 一种粉末冶金模具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE141650C (fr) *

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE291257C (fr) *
US4450127A (en) * 1982-02-23 1984-05-22 Ptx Pentronix, Inc. Method for compacting powder material with adjustable die and punch assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE141650C (fr) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2165358C1 (ru) * 1999-08-03 2001-04-20 Московский государственный технологический университет "СТАНКИН" Механический пресс для объемной штамповки с секторным исполнительным механизмом
CN102794926A (zh) * 2011-05-25 2012-11-28 来安县隆华摩擦材料有限公司 离合器面片一次性成型模具
CN115703151A (zh) * 2021-08-10 2023-02-17 横店集团东磁股份有限公司 一种粉末冶金模具

Also Published As

Publication number Publication date
ES550478A0 (es) 1987-03-01
ATE38181T1 (de) 1988-11-15
EP0186878B1 (fr) 1988-10-26
DE3565796D1 (en) 1988-12-01
ES8703772A1 (es) 1987-03-01
DE3447831A1 (de) 1986-07-03

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