US3593366A - Multiple punch tool set for powder compacting press - Google Patents

Multiple punch tool set for powder compacting press Download PDF

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Publication number
US3593366A
US3593366A US782918A US3593366DA US3593366A US 3593366 A US3593366 A US 3593366A US 782918 A US782918 A US 782918A US 3593366D A US3593366D A US 3593366DA US 3593366 A US3593366 A US 3593366A
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punch
actuating rod
punches
die
sleeve member
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US782918A
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English (en)
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Joseph E Smith
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Wolverine Pentronix Inc
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Wolverine Pentronix Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/04—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with a fixed mould

Definitions

  • a tool and die set for a powder-compacting press comprising a tool capsule and a die plate having punch apertures and discharge apertures, punches for said punch apertures which may contain core rods held immovable in relation to said punches and which are lockable in position so as to be flush with the surface of said die plate and in which said punches are telescopically arranged dual punches for movement relative to each other to form shaped articles.
  • the present invention relates to powder-compacting presses and more particularly to an improved tool capsule or tool and die set assembly for such presses having means providing an accurate adjustment of the die cavity dimensions by relative adjustment of the punches associated with the tool set to insure a more precise dimensional control over the finished compacted article and which mayhave means to adjust and secure acore rod associated with said punches in said tool-set assembly.
  • the present invention is a modification of a tool capsule or tool and die setof the character provided as part of apowder compacting press, as for instance disclosed in U.S. Pat. Nos. 3,328,842 or 3,414,940.
  • 3,4l5,l42 consists of a machinefor the purpose of manufacturing memory cores, beads, pellets, balls, tablets or other shaped articles made of powdered ferrite, glass or other comparable powdered substances capableof forming a product upon.the'application of a pressure in a confined die cavity.
  • porous bearings and bushings and the like.
  • Computer memory cores and porous bearings or bushings normally have a toroidal or cylindrical shape, while pharmaceuticals may take the form of flat-sided or slightly crowned tablets, whereas balls for ballpoint pens are formed with a spherical shape.
  • the compressing of thepowdered material must be exact andrepeatedly constant. If the dimensional and density specifications. are, not held within. close tolerances, the playback level, for instance, fromthe cores in .a computer memory bank will not be ,substantiallyconstant from coreto ticles are compacted and formedin a single or multicavity die plate forming part of the tool set.
  • the finished articles are automatically ejected from the die, picked up by a vacuum suction. head or mechanical means, and swept out through discharge ports into suitable containers.
  • a workstationpositioner assembly which is part of the press, is angularly movable over the die plate and carries a powder dispenser, an anvil, and a pickup head.
  • the powder dispenser which is supplied with powdered material from a powder material supply source connected thereto by means of a flexible tubing or the like, is
  • One of the problems associated with high production automatic powderlcompacting presses of this character is the maintenance of a high degree of surface finish of the various tool and die members exposed to the powder and which are responsible for the dimensional tolerance of the finished articles.
  • the die plate and the punches are normally formed of a hardened tool steel or tungsten carbide and the surface of the die plate and the anvil are normally provided with a super finish.
  • some powdered substances for instance, powdered ferrite, used in the formation of computer memory cores or the like, have highly abrasive properties.
  • the upper surface of the die plate tends to become pitted as the positioner assembly, which traverses the die plate, sweeps the excess powdered ferrite from the surface of the die plate prior to moving the anvil into engagement over the filled cavities.
  • This sweeping action tends to wear the die plate so that acceptable dimensional tolerances are lost.
  • the upper ends of the punches become worn due to their repeated compaction of the powdered ferrite.
  • a conventional tool capsule has to be disassembled and the working surface of the die plate refinished, and the core rods and punches refinished or replaced depending upon the amount of wear which has developed, and then the various components have to be reassembled for further utilization.
  • the present invention provides a novel unitary tool and die set for a powder-compacting press adapted to produce irregular-shaped articles from a powdered material such as cups, flanged buttons or the like, necessitating the provision of multiple punches for each die cavity which are axially movable relative to each other and one moving within the other in such way that upon compaction of the powder in the die cavity in one embodiment of the present invention flanged buttons will be produced and in another embodiment of the present invention hollow cups will be produced.
  • a powdered material such as cups, flanged buttons or the like
  • Core rods may be provided extending through the central punch in case the shaped articles are to be provided with central apertures.
  • FIG. 2 is a similar cross section of the same embodiment as in FIG. 1 showing the relative position of the punches in the press position;
  • FIG. 4 is a transverse cross section through the present novel tool and die set of FIG. I as seen along line 4-4 thereof;
  • FIG. 5 is a vertical cross section through a further embodiment of a novel tool and die set according to the present invention, for making the article shown in FIG. 3a, showing the relative position of the punches in the fill position;
  • FIG. 6 is a vertical cross section similar to FIG. 5 showing the relative position ofthe punches in the press position
  • FIG. 7 is another vertical cross section similar to FIGS. 5 and 6 showing the relative position of the punches in the eject position
  • FIG. 13 is a perspective view of the finished article made by the tool and die set of FIGS. 9I2.
  • the die plate 22 is adapted to be supported on or within the work surface of the press (not shown) and is provided with an aperture 26 disposed substantially in the center of the die plate 22 and adapted to receive a die bushing 28.
  • the internal surfaces of the die bushing 28 define a die cavity 30 for the reception of powdered material 32 (FIG. 1
  • the tool capsule 24 comprises a cylindrical housing 34 suspended underneath the die plate 22 to which it is attached by screws 23 extending through a flange 36.
  • the longitudinal axis of the capsule housing is axially aligned with the center of the die bushing 28.
  • a telescoping punch assembly 38 comprised of an inner punch 40 adapted for sliding movement within a cylindrical outer punch 42 which, in turn, is adapted in the assembled position to be axially aligned with and slidingly engaged with the inner surface of the die bushing 28.
  • the lower end of the inner punch 40 is secured to the head portion of a ramrod 44 which imparts a reciprocating movement to the inner punch 40.
  • the lower. end of the outer punch '42 is provided with an outwardly circumferentially extending flange 43" disposed within the sleeve 58' to be retained within the upper end of the sleeve 58 by means of the sleeve flange 62 which prevents movement of the outer punch 42 outwardly of the sleeve.
  • FIG. 1 which shows the relative position of the punches of the tool and die set in. the powder fill position
  • the ram- 44 has retracted the punch assembly 38 a predetermined amount so as to allow thedic-cavity 30 to be filled with powdered material 32.
  • the inner punch 40 is retracted further than: the outer punch 42, thus providing in effect a secondary die'cavity 68 defined by the internal diameter of the outer punch 42' and the upper end of the inner punch 40.
  • the actual depth of both the primary die cavity 30 and secondary die cavity 68- is determined by the relative position of the sleeve 58 inregard to the abutment 48 since the flanged connection of the sleeve 58 with the flanges 43 of the outer punch 42 regulatesthe extent that the outer punch extends into the die bushing 28.
  • the outer punch 42 is caused to be extracted further from the die cavity 30 shortening the distance 0D,", and by screwing the abut ment 48 up on the inner punch the outer punch is caused to extend further into the die cavity 30-during the pressing operation.
  • the fill retraction and press extent of the inner punch 40 is governed by the movement 'of the ram 44', which can likewise be adjusted by the initial machine setup.
  • the ram 44 is actuated by the press mechanism for reciprocation as an anvil means or the like is placed over the die cavities.
  • the inner punch 40 is advanced first by the ram 44 independently of the outer punch 42 which remains stationary at this stage. This is made possible by the As seen in FIG. 2, further movement of the ram 44 causes the surface 49 of the abutment 48 to engage against the flange 43 of the outer punch 42 whereupon both punches 40 and 42 are moved simultaneously a short distance for the final compression of the article 66.
  • the inner punch 40 moves a further distance than the outer punch 42 due to its independent movement at the beginning of the pressstroke for initially compressing the powder.
  • The. initial position: of the punches 40 and 42 relative to each. other, as illustrated in-FlG. l, is adjustable by relative rotation of the abutment 48 and sleeve 58 to permit a suffcientv amount of powder to fill the die cavities and 68, and to limit the length of the strokes of the punches relative to each other in order to produce the article 66 of FIG. 30 having the required dimensions and density.
  • the article 66 is ejected. from the-die cavity 30 by a final stroke of the punch assembly 38' moving both punches 40 and 42 simultaneously to. permit the removal of the article. Thereafter, the punch assembly returns to its original fill position as in FIG. 1 causing first the inner punch 40 to be moved independently of the outer punch 42 until the flange 62 of the sleeve 58 comes in contact with the flange 43 of the outer punch 42, whereafter both punches 40 and 42 are again moved together to resume the positionshown in FIG. 1.
  • sule comprises a cylindrical housing 82 provided with a centralbore 84 in alignment with the die cavities 81 which contains a multiple punch assembly 86.
  • the lower end of the housing 82 is closed by a plate 88 attached thereto by screws 90.
  • the plate 88 has a central aperture 92 to permit the extension of a. punch actuating rod 94 therethrough to be disposed within the housing 82.
  • the lower end of the punch actuating rod 94 is attached to the head of a reciprocating ram indicated at 44 for reciprocation of the punch assembly 86.
  • the punch actuating rod 94 which is part of the punch assembly 86, is provided with a first toolholder in the form of an enlarged head portion 98 provided with a relatively deep annular groove 100.
  • the upper end of the head portion 98 is provided with equally angularly spaced, radially outwardly extending slots 102 as seen in FIG. 8, which join the annular groove 100 and which number corresponds to the number of die cavities provided in the die plate 76.
  • Each of the slots 102 is adapted to receive an inner punch 104 which has an annular enlarged flange portion 106 at its end of a thickness such as to fit within the annular groove 100 to be retained therein. It will be seen that the depths of the groove 100 and the slots 102 are of such dimensions as to allow the inner punches 104 to radially float therein in order to permit them to be axially aligned with the center of the die cavities 81'.
  • the punch actuating rod 94 is provided below the head portion 98 with screw threads 108 adapted to receive an adjusting nut 110 for axial movement along the punch actuating rod 94.
  • the nut 110 moves with the punch actuating rod 94 upon reciprocation of the latter partly through the central aperture 92 in the bottom plate 88.
  • the punch actuating rod 94 including the head portion 98, is surrounded within the housing 82 by a tubular sleeve or cup member 112 which is axially independently movable within the housing 82 between an upper and lower limit position as will be described.
  • the slots 126 of the toolholder 114 will be aligned with the slots 102 in the head portion of the punch actuating rod 94 and are adapted to receive hollow cylindrical outer punches 128 which have a radial flange 130 at the lower end therein on the toolholder 114.
  • the depths of the groove 122 and the slots 126 are sufficient to permit the outer punches 128 to be axially aligned on center with the die cavities 81.
  • the hollow cylindrical outer punches 128 are adapted to telescopingly fit over the inner punches 104 for axial sliding movement relative thereto and for extension into the die cavities 81.
  • the inner punches 104 are axially bored through to permit the insertion of a core rod 132 in each of the punches for free sliding movement therein.
  • the core rods 132 extend downwardly freely slidable through apertures 134 in the head portion 98 of the punch actuating rod 94 and, further, through apertures 136 in the bottom plate 116 of the cup 112 which are aligned with apertures 134 to permit free sliding movement of the core rods.
  • the lower ends of the core rods 132 are individually secured within the bottom plate 88 of the housing 82 by means of individual setscrews 138 which are radially inserted through the side of the plate 88.
  • the core rods 132 can thus be longitudinally adjusted by loosening the setscrews 138 and moving the core rods upwards through the inner punches 104 until their top end is flush with the top surface of the die plate 76.
  • the setscrews 138 are then tightened to securely lock the core rods to the stationary housing 80 so that upon reciprocation of the punch assembly 86 the core rods will stay in place.
  • the head portion 98 of the punch actuating rod 94 and the surrounding cup 112 are adapted for reciprocation relative to each other in one stage of the operation and for unitary reciprocation movement in another stage of the operation. This is determined by the spacing D (FIG. between the upper surface 97 of the head portion 98 and the underside 113 of the toolholder 114 of the cup 112, which can be adjusted by rotation of a plurality of adjustable setscrews 140 provided in the bottom plate 116 against which the head 98 abuts in the fill position of the punch assembly as seen in FIG. 5 thus regulating the extent of the punches within the die cavities during the powder fill operation.
  • the maximum press extent of the outer punches 128 within the die cavities 81 can be regulated.
  • the head portion 98 of the punch actuating rod has been moved downward within the cup 112 and towards the bottom plate 116 until the head portion 98 cup 112 which tends to bias the cup upwardly to maintain engagement of the setscrews 140 against the underside of the head portion 98 and thereby likewise maintaining the position of the outer punches 128 within the die cavities 81 during the fill cycle.
  • the outer punches 128 extend further into the die cavities 81 than the inner punches 104, thus providing a secondary die cavity 144 (FIG. 5).
  • This arrangement is similar to that in FIGS. 1-4 to produce a similar button-type article as shown in FIG. 3a with the exception that a central bore is provided through the article by the provision ofthe core rods 132.
  • the die cavities 81 and 144 are filled with powdered material 32 by any such means as disclosed in the aforementioned U.S. Patents.
  • an anvil means 25 is placed over the die cavities and the press cycle is initiated by upward movement of the ram 44 when actuated by the press mechanism (not shown).
  • the inner punches 104 will be moved independently of the outer punches 128 by their direct connection to the head 98 of the punch actuating rod 94.
  • the head portion 98 is caused to move upward within the cup 112, thereby compressing the spring 142 and advancing the inner punches 104 up on the stationary core rods 132 for an initial compression of the powder within the die cavities 144.
  • the outer punches 128 will not be moved during this stage until the adjusting nut on the punch actuating rod 94 comes to abut against the bottom plate 116 of the cup 112 as seen in FIG. 6. Further upward movement of the punch actuating rod 94 thereafter causes the outer and inner punches to be moved simultaneously since the cup 112 that supports the outer punches 128 is taken along by the nut 110.
  • the combined stroke of both outer and inner punches causes final compression of the powder within the die cavities 81 and 144 to produce an article 66a having a shank portion 70a and a flange portion 72a, which is also provided with an axial bore 71 caused by the use of the core rods 132. (FIG. 7).
  • the retreat of the punch actuating rod 94 first causes the inner punches 104 again to be moved independently of the outer punches 128 until the head portion 98 comes to rest upon the setscrews in the bottom plate 116 of the cup 112. After this, the punch assembly will be moved as a unit to assume to position in FIG. 5.
  • the spring 142 during the receding movement of the punch actuating rod, expands to exert a constant force on the cup 112 to prevent the cup 112 from dropping down in the housing 82 by gravity force as the nut 110 moves away from the bottom plate 116 upon return movement of the punch actuating rod 94.
  • this embodiment illustrates a multiple cavity tool and die set 148 constructed and adapted to produce a cup-shaped article 150 as shown in FIG. 13.
  • the tool and die set 148 is composed of a die plate 152 having a plurality of equally spaced apertures 154 (two of which are shown) which are preferably arranged in a circle and which are adapted to receive die bushings 156 press-fitted therein and which internal bores define die cavities 158.
  • a tool capsule 162 Attached to the underside of the die plate 152 by screws 160 is a tool capsule 162, which comprises an open cylindrical housing 164 having a straight axial bore 166. The open lower end of the housing 164 is closed by a detachable plate 168 attached to the housing by means of screws 170.
  • the plate 168 has a central aperture 172 to permit the extension therethroug'h of a punch actuating rod 174 which extends into the housing 164 for actuation of a multiple punch assembly 176 for reciprocation within the housing 164, by means of a press ram 44 to which the lower end of the punch actuating rod 174 is connected.
  • the punch actuating rod 17 4 f which is part of the punch assembly 176, is provided with a first toolholder in the form of a diametrically enlarged head or flange portion 178 provided with an annular groove 180.
  • the upper side of the enlarged head portion 178 is provided with a plurality of radially outwardly extending slots 182 which join the groove 180.
  • the slots 182 are equally spaced around the head portion 178 as seen in FIG. 12 and correspond in number to the number of die cavities provided in the die plate 152.
  • the slots 182 are adapted to receive each a hollow cylindrical outer punch 184 each provided at its end with a radial flange 186 which fits into the annular groove 180 by which the punches 184 are held in the slots 182. In assembly, the punches 184 will be aligned with the die cavities 158 for extension thereinto.
  • the intermediate portion of the punch actuating rod l74 is provided with screw threads 188 for threading engagement with a longitudinally adjustable ring or nut 190 adapted to normally move with the punch actuating rod through the aperture 172 in the plate 168 upon reciprocation of the latter.
  • the nut 190 at one stage of the press operation, is adapted to abut against a second toolholder in the form of a ring 192 which is loosely mounted by way of a central aperture 194 around the punch actuating rod 174 between the head portion 178 and the nut 190 for axial movement relative to the punch actuating rod.
  • the ring 192 is of sufficient thickness to accommodate the provision of an annular groove 196.
  • An upper flange 198 formed by the groove 196, is provided with a plurality of radially outwardly extending slots 200 which join the groove 198.
  • the slots 200 are equally spaced around the flange 198 as seen in FIG. 12 and correspond in number to the number of die cavities in. the die plate 152.
  • the slots 200 are adapted to receive each an inner punch 202 having each a flange portion 204 at its lower end which fits into the groove 198 to thus retain the punches 202 on the ring 192;
  • the inner punches 202 will be aligned with their respective outer punches 184 to slidably extend therethrough and into the die cavities 158.
  • the inner punches 202 extend further into the die cavities 158 than the outer punches 184 providing a secondary die cavity 212 (FIG. 9) around the tip of the inner punches 202 which, upon compression of the powder in the die cavities, produces the cylindrical wall 151 of the cup-shaped article 150 in FIG. '13.
  • the fill and press extent of the punches 184 and 202 within the die cavities and their movement relative to each other and together during the pressing operation can be precisely adjusted to obtain the desired thickness and density in the wall and bottom portion 155 of the cupshaped article 150. This is accomplished by moving the nutl90 up or down on the punch actuating rod 174, which determines the maximum extent of the inner punches 202 during the press operation.
  • the relative axial spacing of the outer punch 184 in regard to the inner punch 202 is determined by the adjustable spacing D" (FIG. 10) between the head portion 178 of the punch actuating rod 174 and the freely movable ring 192.
  • adjusting screws 214 have been provided-in the ring 192 which are positioned along the outer edge of the ring to extend therethrough between the slots 200 as seen in FIG. 12.
  • the head portion 178 is caused to abut upon the adjusting screws 214 of the ring 192 so that upon adjustment of the adjusting screws 214 the initial fill position ofthe outer punches can be adjusted accordingly.
  • the adjusting screws 214 can be adjusted from outside the tool housing 164 by means of aligned apertures 216 provided in the bottom plate 168.
  • the die cavities 158 and 212 are filled with powdered material 32 by any known means.
  • an anvil means or the like 25 is placed over the die cavities (FIG. 10) and the ram 44 is actuated by the press mechanism (not shown) to move the punch assembly 176.
  • the outer punches 184 which are directly attached to the head 178 of the punch actuating rod 174 are first moved independently of the inner punches 202 to initially compress the walls of the cup-shaped article and to compact the powder into the bottom portion of the article against the surface of the anvil means 25.
  • the outer punches are moved first instead of the inner punches to compact the powder into the bottom portion of the cup-shaped article. If the arrangement would be reversed by moving the inner punches first, a relatively weak bottom portion and high density wall portion would be obtained which is undesirable.
  • the finished cup article 150 will be provided with an aperture 153 in the bottom portion 155.
  • core rods may be omitted or, on the other hand, instead of a single center core rod, multiple core rods for each die cavity may be employed. The use and arrangement of the core rods form no part of the present invention.
  • Tl-le present invention may be embodied in certain other forms without departing from the essential characteristics therefrom. Therefore, the present embodiments are to be considered in all respects as illustrative only and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description.
  • a punch and die assembly for a powder-compacting press for making shaped articles comprising a die plate having at least one die cavity opened at opposite ends and adapted to be filled with a powdered material, a punch assembly associated with said die plate having at least a pair of punches consisting of an outer punch and an inner punch slidingly arranged one within the other for extension into one of said ends of said die cavity, overlapping anvil means dependent from said press and adapted to engage a surface of said die plate for closing the other end of said die cavity, a punch actuating rod axially aligned with said punches and adapted to reciprocate and support said outer and said inner punch, means associated with said punch actuating rod to adjustably vary the extent of said outer and said inner punches within said die cavity relative to each other, said punch actuating rod being adapted to move one of said punches independently of the other punch to initially compact said powdered material against said anvil means, and abutment means carried by said punch actuating rod engageable with
  • said means to adjustably vary the extent of said outer and said inner punches relative to each other comprises an adjustable abutment member on said punch actuating rod adapted for abutment with said sleeve member to thus vary the axial position of said sleeve member relative to said punch actuating rod, and adjustable abutment members on said sleeve member adapted to vary the relative axial position of said punch supported on said punch actuating rod in relation to said punch supported on said sleeve member.
  • a multiple punch tool and die set assembly for compacting powder to produce shaped cylindrical articles comprising a reciprocable punch actuating rod having an enlarged head portion for the support of a first set of a plurality of punches thereon, a sleeve member positioned in freely surrounding relationship to said punch actuating rod for axial movement relative thereto having means to support a second set a plurality of punches in coaxial telescopic arrangement with said first set of punches, adjustable means on said punch actuating rod to adjustably limit the axial movement of said sleeve member in relation to said punch actuating rod, first means to cause initial movement of said punch actuating rod independently of said sleeve member and second means to cause final simultaneous movement of said punch actuating rod with said sleeve member.
  • said adjustable means on said punch actuating rod comprises, an abutment member axially movable along said punch actuating rod adapted for abutment with said sleeve member to determine the relative axial position of said sleeve member in relation to said punch actuating rod.
  • said sleeve member has the shape of an inverted cup having a closed top placed over said head portion of said punch actuating rod and said means to support said second set ofa plurality of punches comprises an annular groove in said closed top and a plurality of radial slots equal in number to the number of said plurality of punches to receive and retain said punches within said annular groove.
  • adjustable means associated with said sleeve member for varying the relative axial position of said second set of punches in relation to said first set of punches.
  • said sleeve member comprises a ring having an annular groove and a plurality of radial slots for the reception and retainment of said second set of punches.
  • adjustable means associated with said ring for varying the relative axial position of said second set of punches in relation to said first set of punches.
  • a tool and die set for a powder-compacting press comprising a die plate having at least one aperture defining a die cavity, a tool capsule attached to said die plate, said tool capsule containing a punch assembly for reciprocation therein, said punch assembly comprising a punch actuating rod provided with at least one telescopically arranged pair of punches adapted for extension into said die cavity, first means to support the first punch of said telescopically arranged punches on said punch actuating rod, second means to support the second punch of said telescopically arranged punches on said punch actuating rod independently of said first means, means to axially adjust the rclative axial position between said first punch and said second punch of said telescopically arranged pair of punches, first means associated with said punch actuating rod upon application of force to cause said first punch of said telescopically arranged pair of punches to move into said die cavity independently of said second punch of said telescopically arranged pair of punches in a first stage
  • said means to axially adjust the relative axial position between said first punch and said second punch comprising a plurality of adjusting members associated with said punch actuating rod and with said second means to support said second punch independently of said first means.
  • said first punch provided with an axial bore to receive a core rod therein.
  • said second punch provided with an axial bore to receive a core rod therein.
  • said means to support the first punch of said telescopically arranged punches on said punch actuating rod comprising an enlarged head portion on said punch actuating rod, an annular groove provided in said enlarged head portion, radial slot means joining said annular groove, said first punch adapted to be placed in said slot means and being provided with a flange adapted to be retained in said annular groove.
  • said means to support the second punch of said telescopically arranged punches on said punch actuating rod independently of said first means comprising a sleeve member freely surrounding said punch actuating rod for axial movement relative thereto in one position of said punch actuating rod and conjoint movement therewith in another position of said punch actuating rod, said sleeve member provided with annular groove means, radial slot means joining said groove means and aligned with said radial slot means in said enlarged head portion, said second punch adapted to be placed in said radial slot means for telescopic engagement with said first punch and being provided with a flange adapted to be retained in said annular groove means.
  • a punch tool and die set assembly for compacting powder to produce shaped articles comprising a reciprocable punch actuating rod, a die plate having a die cavity, a punch assembly associated with said die plate and having at least one set of dual punches comprising an outer punch and an inner punch slidably arranged one within the other for coaxial telescopic extension into said die cavity, said punch actuating rod adapted to initially move said inner punch independent of said outer punch initially to compact said powder material in said die cavity, an adjustable abutment member carried by said punch actuating rod and adapted for abutment with said outer member carried by said abutment member, said sleeve member being axially adjustable relative to said adjustable abutment member, said sleeve member having means engaging said outer punch to withdraw said outer punch from said die cavity after said inner punch has been withdrawn a predetermined distance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
US782918A 1968-12-11 1968-12-11 Multiple punch tool set for powder compacting press Expired - Lifetime US3593366A (en)

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US78291868A 1968-12-11 1968-12-11

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US (1) US3593366A (fr)
JP (1) JPS506261B1 (fr)
BE (1) BE743018A (fr)
CH (1) CH498676A (fr)
DE (1) DE1961586A1 (fr)
FR (1) FR2025916A1 (fr)
NL (1) NL6918567A (fr)

Cited By (22)

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US3741697A (en) * 1972-02-02 1973-06-26 Wolverine Pentronix Remote control system for powder compacting presses
US3778211A (en) * 1971-12-27 1973-12-11 Redmer Plastics Inc Plastic injection mold apparatus
US3805370A (en) * 1972-08-23 1974-04-23 Wolverine Pentronix Tool set for a powder compacting press
US4302412A (en) * 1977-05-20 1981-11-24 Ptx-Pentronix, Inc. Method for compacting an article of powder material and for ejecting the article from a compacting die
US4347051A (en) * 1979-09-17 1982-08-31 Ptx-Dentronix, Inc. Die and punch assembly for compacting powder material
US4390335A (en) * 1982-02-23 1983-06-28 Ptx-Pentronix, Inc. Die, punch and core rod assembly for compacting powder material
US4631015A (en) * 1981-05-08 1986-12-23 Mitsuishi Fukai Tekkosho, Ltd. Molding apparatus with replaceable plunger and die set
US5049054A (en) * 1989-03-23 1991-09-17 Dorst-Maschinen- Und Analagenbau, Otto Dorst Und Dipl.-Ing. Walter Schlegel Gmbh & Co. Press having a tool mount to be inserted into the press
US5551856A (en) * 1992-11-05 1996-09-03 Yoshizuka Seiki Co., Ltd. Apparatus for connecting punches in powder molding press machine
EP1228856A2 (fr) * 2001-02-06 2002-08-07 Aktiebolaget SKF Outil pour le compactage de poudre
US20020144519A1 (en) * 2001-03-23 2002-10-10 Gianclaudio Borsarelli Punch assembly for producing hollow glass articles in a mold
US20030047089A1 (en) * 2001-08-31 2003-03-13 Jurgen Hinzpeter Method and apparatus for minimizing the spread of maximumcompression forces in a powder press
US6585507B1 (en) * 2000-10-04 2003-07-01 Sanyasi R. Kalidindi Sampling die and press for compaction of powder sample
US6749416B2 (en) * 2000-05-11 2004-06-15 Wilhelm Fette Gmbh Die for a rotary compression press
US6749420B2 (en) * 2000-10-25 2004-06-15 Alberto Navarra Pruna Flexible ejector for injection molds
US20050112202A1 (en) * 2001-12-24 2005-05-26 Lerner E. I. Dosage form with a core tablet of active ingredient sheathed in a compressed annular body of powder or granular material, and process and tooling for producing it
US20060233879A1 (en) * 2001-12-24 2006-10-19 Teva Pharmaceutical Industries Ltd. Controlled released dosage forms
US20070190204A1 (en) * 2006-01-18 2007-08-16 Hon Hai Precision Industry Co., Ltd. Mold for forming workpiece
US20080175947A1 (en) * 2007-01-19 2008-07-24 Shenzhen Futaihong Precision Industry Co., Ltd. Cut structure for mold
US20080259384A1 (en) * 2006-12-18 2008-10-23 Canon Kabushiki Kaisha Image forming system and information processing apparatus
US20090060771A1 (en) * 2007-09-04 2009-03-05 Burgess-Norton Mfg. Co., Inc. Method of manufacturing crankshaft bushing
US20090325405A1 (en) * 2008-06-26 2009-12-31 Yazaki Corporation Mold unit and module for electrical connection

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DE19714203C2 (de) * 1997-04-07 2000-06-29 Bosch Gmbh Robert Dichtelement für Sensoren

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Cited By (30)

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US3778211A (en) * 1971-12-27 1973-12-11 Redmer Plastics Inc Plastic injection mold apparatus
US3741697A (en) * 1972-02-02 1973-06-26 Wolverine Pentronix Remote control system for powder compacting presses
US3805370A (en) * 1972-08-23 1974-04-23 Wolverine Pentronix Tool set for a powder compacting press
US4302412A (en) * 1977-05-20 1981-11-24 Ptx-Pentronix, Inc. Method for compacting an article of powder material and for ejecting the article from a compacting die
US4347051A (en) * 1979-09-17 1982-08-31 Ptx-Dentronix, Inc. Die and punch assembly for compacting powder material
US4631015A (en) * 1981-05-08 1986-12-23 Mitsuishi Fukai Tekkosho, Ltd. Molding apparatus with replaceable plunger and die set
US4390335A (en) * 1982-02-23 1983-06-28 Ptx-Pentronix, Inc. Die, punch and core rod assembly for compacting powder material
US5049054A (en) * 1989-03-23 1991-09-17 Dorst-Maschinen- Und Analagenbau, Otto Dorst Und Dipl.-Ing. Walter Schlegel Gmbh & Co. Press having a tool mount to be inserted into the press
US5551856A (en) * 1992-11-05 1996-09-03 Yoshizuka Seiki Co., Ltd. Apparatus for connecting punches in powder molding press machine
US6749416B2 (en) * 2000-05-11 2004-06-15 Wilhelm Fette Gmbh Die for a rotary compression press
US6585507B1 (en) * 2000-10-04 2003-07-01 Sanyasi R. Kalidindi Sampling die and press for compaction of powder sample
US6749420B2 (en) * 2000-10-25 2004-06-15 Alberto Navarra Pruna Flexible ejector for injection molds
EP1228856A3 (fr) * 2001-02-06 2002-08-28 Aktiebolaget SKF Outil pour le compactage de poudre
EP1228856A2 (fr) * 2001-02-06 2002-08-07 Aktiebolaget SKF Outil pour le compactage de poudre
US6948339B2 (en) * 2001-03-23 2005-09-27 Bottero S.P.A. Punch assembly for producing hollow glass articles in a mold
US20020144519A1 (en) * 2001-03-23 2002-10-10 Gianclaudio Borsarelli Punch assembly for producing hollow glass articles in a mold
US7147820B2 (en) * 2001-08-31 2006-12-12 Fette Gmbh Method and apparatus for minimizing the spread of maximum compression forces in a powder press
US20030047089A1 (en) * 2001-08-31 2003-03-13 Jurgen Hinzpeter Method and apparatus for minimizing the spread of maximumcompression forces in a powder press
US20050112202A1 (en) * 2001-12-24 2005-05-26 Lerner E. I. Dosage form with a core tablet of active ingredient sheathed in a compressed annular body of powder or granular material, and process and tooling for producing it
US20060233879A1 (en) * 2001-12-24 2006-10-19 Teva Pharmaceutical Industries Ltd. Controlled released dosage forms
US20060233880A1 (en) * 2001-12-24 2006-10-19 Teva Pharmaceutical Industries Ltd. Controlled release dosage forms
EP2172192A1 (fr) * 2001-12-24 2010-04-07 Teva Pharmaceutical Industries Ltd. Forme de dosage dotée d'un comprimé central d'ingrédient actif insérée dans un corps annulaire comprimé de poudre de matériau granulaire et procédé et outillage pour la produire
US7431580B2 (en) * 2006-01-18 2008-10-07 Hon Hai Precision Industry Co., Ltd. Mold for forming workpiece
US20070190204A1 (en) * 2006-01-18 2007-08-16 Hon Hai Precision Industry Co., Ltd. Mold for forming workpiece
US20080259384A1 (en) * 2006-12-18 2008-10-23 Canon Kabushiki Kaisha Image forming system and information processing apparatus
US20080175947A1 (en) * 2007-01-19 2008-07-24 Shenzhen Futaihong Precision Industry Co., Ltd. Cut structure for mold
US20090060771A1 (en) * 2007-09-04 2009-03-05 Burgess-Norton Mfg. Co., Inc. Method of manufacturing crankshaft bushing
US7931856B2 (en) * 2007-09-04 2011-04-26 Burgess-Norton Mfg. Co., Inc. Method of manufacturing crankshaft bushing
US20090325405A1 (en) * 2008-06-26 2009-12-31 Yazaki Corporation Mold unit and module for electrical connection
US8047831B2 (en) * 2008-06-26 2011-11-01 Yazaki Corporation Mold unit and module for electrical connection

Also Published As

Publication number Publication date
JPS506261B1 (fr) 1975-03-12
DE1961586A1 (de) 1970-06-25
NL6918567A (fr) 1970-06-15
CH498676A (fr) 1970-11-15
BE743018A (fr) 1970-06-11
FR2025916A1 (fr) 1970-09-11

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