|Publication number||US3337916 A|
|Publication date||Aug 29, 1967|
|Filing date||Oct 28, 1965|
|Priority date||Oct 28, 1965|
|Also published as||DE1577221A1, DE1577221B2, DE1577221C3|
|Publication number||US 3337916 A, US 3337916A, US-A-3337916, US3337916 A, US3337916A|
|Inventors||Joe A Smith|
|Original Assignee||Cincinnati Shaper Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (13), Classifications (15)|
|External Links: USPTO, USPTO Assignment, Espacenet|
g- 29, 1967 J. A. SMITH 3,337,916
COMPACTING PRESS WITH SELECTIVE EJECTION Filed Oct. 28, 1965 3 Sheets-Sheet l up if W INVENTOR J05 A. SM/TH,
ATTORNEYS Aug. 29, 1967 J. A. SMITH 3,337,916
COMPACTING PRESS WITH SELECTIVE EJECTION Filed Oct. 28, 1965 5 Sheets-Sheet 2 INVENTOR J05 A. 5M/TH,
BY ywm V8446, (ma/ 5 ATTORNEYS Aug. 29, 1967 J. A. SMITH 3,337,916
COMPACTING PRESS WITH SELECTIVE BJECTION INVENTOR Jo A. SM/TH,
United States Patent Filed Oct. 28, 1965, Ser. No. 505,488 .4 Claims. (Cl. 1816.7)
This invention relates to a compacting press with selective ejection. Basically the press of the present invention is substantially the same as that fully disclosed in Belden Patent No. 3,172,156 granted Mar. 9, 1965 The press disclosed in said patent is provided with a core punch and bottom stop arrangement disclosed and claimed in the Iohannigman Patent No. 3,168,759 granted Feb. 9, 1965.
By means of the press described in the said Belden patent, it was possible to compact from powdered or comminuted material a part having a stepped arrangement wherein the steps were of dilferent diameters and in ejection of a compacted part from the said Belden press, the ejection was carried on sequentially to eject in order the portions of ditferent diameters beginning with the largest so that the remaining portions of the workpiece were fully supported until they were ejected. This was accomplished in that after the top punch had completed its compacting stroke, during the course of which all platens in the press floated downward by virtue of the friction between the material being compacted and the walls of the die cavity, means were provided to force the uppermost platen downwardly while the lower platens were held rigidly by their respective stop means. This action ejected the uppermost or larger diameter of the workpiece from the uppermost die. Means were provided which were operated when the upper surface of the uppermost die was substantially flush with the upper surface of the next lower die to release these stop means for the next lower :die so that the uppermost and next lower die would be forced downwardly together. This action proceeded in the same manner with all lower dies until the workpiece was completely ejected so that during the ejection of each diameter of the workpiece, that particular diameter was supported by the upper surface of the next lower die respectively.
With the foregoing basic considerations in mind, it is the principal object of the present invention to provide a press in which the sequence of ejection may be changed as desired, so that while in the patented Belden press the top platen was moved downwardly first during ejection and the intermediate platen next, mechanism has here been provided by means of which the intermediate platen may be moved downwardly for ejection prior to the top platen, and so that in a press having any number of platens, the order of ejection may be changed as desired.
This and other objects of the invention which will be described in greater detail herein-after are accomplished by that certain construction and arrangement of parts of which the following describes an exemplary embodiment.
Reference is made to the drawings forming a part hereof and in which:
FIG. 1 is basically a front elevational view of a press according to the invention, the view being broken down the center to indicate that the parts seen on the righthand of the figure are in a difierent plane than those seen on the left-hand of the figure.
FIG. 2 is a fragmentary diagrammatic cross sectional view taken on the line 2-2 of FIG. 1.
FIG. 3 is a fragmentary cross sectional view on an enlarged scale taken on the line 33 of FIG. 2.
FIG. 4 is a fragmentary diagrammatic cross sectional view taken on the line 44 of FIG. 3.
FIG. 5 is a fragmentary elevational view on an enlarged scale as seen from the right of FIG. 4; and
FIGS. 6, 7, 8, 9 and 10 are diagrammatic views of the sequence of operations in compacting and ejection in the making of a part having a recessed or undercut portion.
Briefly, in the practice of the invention, the ejection rods which release the bottom stops for the various platens are all mounted on the top platen and while the ejection rods for the next lower platen (the intermediate platen in a three platen press) extend only between the top and next lower platens, the ejection rods for platens below the second platen extend through apertures in said second platen and any other platens intermediate the top platen and the platen whose stops they are intended to release. Further, according to the invention, all of the ejection rods are adjustable vertically so that in the full ejection position, the tops of all the lower punches are flush with the feeder table.
Referring now in more detail to the drawings, the press is generally shown in FIG. 1. As there shown, it comprises -a frame 10 and an upper casing 11 which houses the drive motor and eccentric mechanism for the punch and the cam mechanism for the downward movement of the platens during ejection. Since this mechanism is conventional, it will not be described herein. In FIG. 1, the upper die platen is indicated at 13, the intermediate die platen at 14, and the lower die platen at 15. While a three platen press has been shown in the drawings, it will be understood that the principles disclosed herein apply to a press having any desired number of platens. The reciprocating punch is only shown in FIG. 7 at 16 and it is actuated in an entirely conventional manner. The fixed lower punch is indicated at 17 and if the article to be made is to be hollow, a core punch may be provided at 18 (FIGS. 6 to 10 inclusive). The core punch 18 may be mounted axially within the fixed punch 17 and it may be hydraulically actuated by means of a piston and cylinder subjected to hydraulic pressure in known manner. The platens 14 and 15 are fioatingly mounted on heavy guide rods (not shown) and may be supported b pneumatic and hydraulic pressure in known manner. The uppermost die platen is floatingly supported on other rods, also not shown. These details are disclosed in greater detail in the said Belden patent to which reference is made. The platens 14 and 15 are provided with stop means which are strong enough and rigid enough to withstand the entire load of the press, and means are provided for releasing these stop means at the desired time. These various means will not be disclosed in detail since they are 'clearly disclosed in said Belden and Johannigman patents. The stop rods for the platen 14 are indicated at 23 and the stop rods for the platen 15 are indicated at 24. The stop rods 23 are actuated by the ejection rods 25. The ejection rods for the stop rods 24 are indicated at 26. It will be understood that when the ejection rods 25 abut the stop rods 23, the stop rods 23 are released by the mechanism disclosed in the above identified patents and thus the platen 14 may be forced downward for ejection. Similarly, when the ejection rods 26 abut the stop rods 24, the latter are released so that the platen 15 may be forced downwardly for ejection.
Whereas in the Belden patent the ejection rods 25 were substantially arranged as they are in the present invention, the ejection rods 26 were mounted on the intermediate platen '14 so that the platen 14 had to be released before the platen 15 could be released. According to the present invention, however, the ejection rods 26 are also mounted on the top platen 13 and pass through holes in the platen 14.
The ejection rods 25 together are adjustable vertically to vary the gap indicated at A in FIG. 1 and the ejection rods 26 are together adjustable to vary the gap indicated 3 at B in FIG. 1. It will be clear, therefore, that if gap B is smaller than gap A, the platen will be released before the platen 14, which was not possible with a device according to the Belden patent. If the several ejection rods are adjusted, however, to make the gap A smaller than the gap B, then the press will function in the same manner as that of the Belden patent and the platen 14 will be released before the platen 15.
The adjustment of the ejection rods and 26 is dependent upon the fill settings of the specific tooling. The ejection rods 25 are together adjustable vertically so that the punch mounted in the intermediate platen is flush with the tooling in the top platen when gap A is closed. Similarly, ejection rods 26 are together adjustable vertically so that the punch mounted in the lower platen is flush with the tooling in the top platen when gap B is 7 closed.
As can be seen in FIGS. 3, 6, 7, 8, 9, and 10 when the platens are moved to the fill position, if the outer ring 61 requires a greater length of powder than the intermediate ring 62, the intermediate platen punch must move upward less than the lower platen punch 62 with the result that gap B must be smaller than gap A causing the lower platen to be ejected first. Thus, with correct fill settings of the platens, the sequence of ejection is always correct depending upon the configuration of the part.
The adjustment for the ejection rods is generally similar to that disclosed in the Belden patent. On the front of the machine there are mounted the cranks 30 and 31.
As best seen from a study of FIGS. 4 and 5, the crank 30 is mounted on a shaft 32 and at its other end is provided with a bevel pinion 34 meshing with another bevel pinion 36 which has mounted fixedly therewith a pinion 38. It will be observed that the parts numbered 33, 35,
.37, and 39 correspond to the parts numbered 32, 34, 36,:
38. The pinion 38 engages a large ring gear 40, whereas the pinion 39 engages an identical ring gear 41 mounted .therebelow. The ring gear 40 drives the pinions 42 while the ring gear 41 drives the pinions 43. The pinions 42 are internally threaded so that rotation of these pinions produces vertical translation of the ejection rods which have an externally threaded portion engaging therein, and in this manner rotation of the crank 30 produces rotation of the pinions 42'and thus a translation of the ejection rods 26, while rotation of the crank 31 produces rotation of the pinions 43 and thereby a translation of the ejection rods 25.
platen 15, and the stationary lower punch 63 is mounted on the bed of the machine. The chain line XX indicates the level of the stationary punch 63 so as to make the operation more readily understood.
In vFIG. 6 the powder to be compacted has been inserted in the cavity as indicated at 64 and all the platens and dies are in the position for filling. In FIG. 7 the reciprocating punch 16 has completed its downward compacting stroke and it will be-observed that the several platens with their associated dies have floated downwardly and the compacted article now exhibits its final configuration at 50.
The entire load of the press has been taken by the several stop rods as outlined above. At the completion of the compacting stroke, the platens are forced further downwardly in order to achieve ejection of the part 50. Since the workpiece St} has the undercut portion 51, it is desired to eject only so much of the largest diameter as will carry the underside of the undercut portion 51 out of the die platen 14 so that the part is ejected down to the bottom.
of the outside diameter at which point the top surface of the die 60 and the punches 61, 62 are flush (FIG. 9). At this point then the stop rod for the intermediate platen 14 is released and the die 60 and the punches 61 and 62 move downwardly together to eject the hub 50b of the workpiece 50. It will be seen that by this sequence of ejection where the bottom platen is released before the intermediate platen, all parts of the workpiece 50 are fully supported until they have been ejected. In FIG. 10, of course, the core punch 18'has been withdrawn down wardly so that the workpiece 50 may be removed from the press.
From a study of the foregoing description, it will be clear that the principles of this invention may be applied to a pressure having any number of platens and that by adjustment of the fill settings of the several platens," the sequence of ejection may be changed as desired. It will also be clear that all the details which are not specifically shown or described in the present application may be as disclosed in the said Belden and Johannigman patents.
It will be understood that modifications may be made without departing from/the spirit of the invention and no limitation is therefore intended which is not specifically set forth in the claims which follow.
The embodiments of the invention in which an exclusi-ve property or privilege is claimed are defined as follows 1. In a multi-platen compacting press for forming powdered material into an article having portions of different diameter, said press comprising a frame, a plurality of die platens floatingly mounted in said frame and each carrying a die, said dies being in telescoping relationship, a reciprocable punch and a fixed punch in axial alignment,
means for forcing said reciprocable punch downwardly diate die platens for releasing the stop means for said next intermediate die platen, other spacing means between the upper and each other intermediate and the lower die platens for releasing the stop means for the respective other intermediate and the lower die platens, said other spacing means passing through all such intermediate platens as intervene, said several spacing means being separately adjustable, whereby said upper die platen, through a selective one of said spacing means, may first release the stop means for a selective platen, and thereafter, through other selected ones of said spacing means, release the stop means for other selective platens in a selective order.
2. A compacting press according to claim 1, wherein each of said spacing means and stop releasing means comprises two diametrically opposed spacer rods mounted on the upper platen, one pair for each intermediate and the lower platen, and two diametrically opposed stop rods for the passage of said spacer rods for the stop rods for lower ones of said intermediate platens and the lower platen.
3. In a three platen compacting press for forming powdered material into an article having portions of three difplatens, each of said stop means being capable of taking the full load of the press, release means for releasing said several stop means, and means operative upon completion of the compacting stroke of said reciprocable punch to force the upper die platen downwardly; first spacing means between the upper and intermediate die platens for releasing the stop means for said intermediate die platen, second spacing means between the upper and lower die platens and passing through the intermediate platen for releasing the stop means for the said lower platen, said first and second spacing means being separately adjustable, whereby said upper die platen, through said first spacing means, may first release the stop means for said intermediate platen, and thereafter, through said second spacing means, release the stop means for said lower platen, or, alternatively, said upper die platen through said second spacing means may first release the stop means for said lower platen, and thereafter, through said first spacing means, release the stop means for said intermediate platen.
4. A compacting press according to claim 3, wherein each of said first and second spacing means comprises two diametrically opposed spacer rods mounted on the upper platen, and a pair of diametrically opposed stop rods mounted on each of the intermediate and lower platens, the pair of stop rods on the intermediate platen being axially aligned respectively with the spacer rods of said first spacing means, the pair of stop rods on the lower platen being axially aligned respectively with the spacer rods of said second spacing means, said intermediate platen having apertures for the passage of the said spacer rods of said second spacing means.
References Cited UNITED STATES PATENTS 2,509,783 5/1950 Richardson 18-16.7 3,154,812 11/1964 Haller 1816.7 3,168,759 2/1965 Johannigman 18l6.7 3,172,156 3/1965 Belden l816.7
I. SPENCER OVERHOLSER, Primary Examiner. I. HOWARD FLINT, JR., Examiner.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3 ,337 ,916 August 29 1967 Joe A. Smith It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.
Column 1, line 48, beginnlng with "while in" strike out all to and including "platen" in line 53, same column 1, and insert instead whereas in the press of the above patents the top platen was moved downwardly first during ejection and the intermediate platen next and then the lower platen, mechanism here has been provided by means of which the top platen may be moved downwardly first during ejection and the lower platen next and then the intermediate platen column 4, line 5, for "intermediate" read bottom line 6, for "14" read l5 Signed and sealed this 25th day of February 1969.
Edward M. Fletcher, Jr. EDWARD J. BRENNER Attesting Officer Commissioner of Patents
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2509783 *||Oct 17, 1945||May 30, 1950||Hpm Dev Corp||Apparatus for molding|
|US3154812 *||Mar 7, 1962||Nov 3, 1964||John Haller||Hydraulic briquetting press|
|US3168759 *||Jan 17, 1963||Feb 9, 1965||Cincinnati Shaper Co||Core punch and bottom stop therefor|
|US3172156 *||Sep 6, 1962||Mar 9, 1965||Cincinnati Shaper Co||Compacting press|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3460202 *||Apr 28, 1967||Aug 12, 1969||Cincinnati Shaper Co||Hydraulic releasable stop device for presses and the like|
|US3464089 *||May 19, 1967||Sep 2, 1969||Cincinnati Shaper Co||Compacting press|
|US3601855 *||Jun 17, 1970||Aug 31, 1971||Sylvania Electric Prod||Apparatus for forming a composite metal-ceramic article|
|US3647332 *||Aug 29, 1969||Mar 7, 1972||Parker Hannifin Corp||Hydraulic press|
|US3733154 *||Aug 17, 1971||May 15, 1973||Wolverine Pentronix||Deflection compensation system for press|
|US3741697 *||Feb 2, 1972||Jun 26, 1973||Wolverine Pentronix||Remote control system for powder compacting presses|
|US4153399 *||Sep 8, 1977||May 8, 1979||Ptx-Pentronix, Inc.||Multiple punch tool set for powder compacting press|
|US4260346 *||Oct 9, 1979||Apr 7, 1981||Anderson Jr Raymond B||Press assembly for powder material|
|US4370119 *||Sep 9, 1981||Jan 25, 1983||Tamagawa Kikai Kabushiki Kaisha||Powder press|
|US4443171 *||Apr 14, 1982||Apr 17, 1984||Wesjay, Inc.||Multi-motion mechanical press|
|US4752200 *||Feb 19, 1987||Jun 21, 1988||Standard Tool & Die, Inc.||Apparatus for a controllable press ejection system|
|US5326242 *||Aug 9, 1991||Jul 5, 1994||Yoshizuka Seiki Co., Ltd.||Powder molding press|
|EP0388721A2 *||Mar 8, 1990||Sep 26, 1990||Dorst Maschinen und Anlagenbau Otto Dorst und Dipl.-Ing Walter Schlegel GmbH & Co.||Press with tool frame insertable into the press|
|U.S. Classification||425/78, 425/444, 425/422, 425/351|
|International Classification||B22F3/03, B30B15/32, B30B11/02|
|Cooperative Classification||B30B11/02, B30B11/027, B22F3/03, B30B15/32|
|European Classification||B30B11/02, B22F3/03, B30B15/32, B30B11/02D|