US3411340A - Knock-out device of impact forming machine - Google Patents

Knock-out device of impact forming machine Download PDF

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Publication number
US3411340A
US3411340A US574033A US57403366A US3411340A US 3411340 A US3411340 A US 3411340A US 574033 A US574033 A US 574033A US 57403366 A US57403366 A US 57403366A US 3411340 A US3411340 A US 3411340A
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US
United States
Prior art keywords
knock
piston
jack
impact forming
ram
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.)
Expired - Lifetime
Application number
US574033A
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English (en)
Inventor
Asari Akira
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Application granted granted Critical
Publication of US3411340A publication Critical patent/US3411340A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B21J7/22—Drives for hammers; Transmission means therefor for power hammers
    • B21J7/24—Drives for hammers; Transmission means therefor for power hammers operated by steam, air, or other gaseous pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/14—Ejecting devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/028—Impact

Definitions

  • the present invention relates to a product knock-out device of impact forming machine, more particularly, relates to a knock-out device for carrying out the operation of removing formed products from the mold immediately after forming in an impact forming machine which forms materials placed between the upper mold and a lower mold which faces this by driving a ram rapidly with hydraulic pressure.
  • an impact forming machine forms materials by utilizing the velocity energy due to high speed of ram and a very large force can be obtained by this and furthermore, it has the feature of having a very high fabrication speed.
  • the object of the present invention is to speed up the ejection of the formed products in order to improve the efiiciency of the impact forming machine.
  • this invention is characterized by carrying out the removal of the product from the upper mold by the return action of the ram utilizing a jack mechanism and immediately before this action or when it has been completed, the knock-out action is carried out to knock-out the product from the lower mold.
  • the jack mechanism for the return action of the ram and the knock-out mechanism are interlocked so that they act in sequence, by which knock-out is carried out after the stroke has moved to a certain extent after the jack mechanism has begun to act, during which time, the jack mechanism removes the product from the upper mold and then the knock-out mechanism carries out the actual knock-out operation to eject the product from the lower mold.
  • FIGS. 1, 2, 3, 4 and 5 are longitudinal sectional views showing in sequence the operation of an embodiment of a knock-out device of the present invention
  • FIG. 6 is a longitudinal sectional view of another embodiment of the knock-out device of the present invention.
  • an upper half of ram 3 extends into a gas cylinder 2 which comprises the upper, interior part of frame 1 and a large piston 4 at its upper end fits into a cavity 5 formed in the ceiling of the cylinder 2.
  • a gas cylinder 2 which comprises the upper, interior part of frame 1 and a large piston 4 at its upper end fits into a cavity 5 formed in the ceiling of the cylinder 2.
  • the ram 3 is maintained at the upper dead point as shown in FIG. 1 by the pressure of gas acting on the lower surface of the piston 4.
  • the lower mold is made hollow and a knock-out member 10 is pushed in from the lower side and its top surface 11 forms the bottom of the mold of lower mold 8.
  • the bottom of knock-out member 10 is in the form of a base 12 and fits into a cavity 13 which is formed at the bottom of frame 1.
  • a cylinder 14 for knock-out is provided at the center and cylinders .15 for jack at both sides of the bottom of frame 1.
  • a knock-out piston 16 whose upper end faces the lower surface of aforementioned knock-out member'10 and in the latter cylinders 15 are fitted jack pistons 17 whose upper ends face the lower surface of the aforementioned ram 3.
  • the knock-out piston 16 has a stem 18 which passes through the frame 1 and extends downward, and an arm 20 having pushing rods 19 whose upper ends face the lower surface of aforementioned jack piston as an integral part of it.
  • both the knockout piston 16 and jack pistons .17 are at the lower dead points (FIGS. 1 and 2) and also, a sufficient clearance corresponding to L is provided between the upper end of the knock-out piston and lower surface of the knock-out member 10.
  • hydraulic pressure is introduced as soon as possible into the lower part of cylinder 14 for knockout and the cylinders 15 for jack to raise the piston 16 for knock-out and jack pistons simultaneously, by which the jacks 17 are pushed upward to the height of the ram in FIG. 3 while the piston for knock-out 16 is rising a distance of L, by which the upper mold 7 separates from the product 9.
  • the aforementioned knock-out member 10 has a rod 21 extending downward, this passes through the center of piston 16 for knock-out and this is supported on the arm 20 by way of a spring 22 so that the knockout member 10 is pushed downiby force from its upper position.
  • the upper mold 7 is pulled out from the product9 immediately after it has been formed; next the removal of the product from the lower mold is carried out by the two-stage operation of the combination of jack pistons 17 for returning the ram 3 and the piston 16 for knock-out which pushes up the knock-out member 10 and furthermore, the upper mold 7 is taken out from the product 9 by the jack pistons 17, the piston 16 for knock-out is made to approach or contact the knock-out member -10 so that the product 9 is removed from the lower mold 8 by the knock-out action immediately before or simultaneously with the removal of the upper mold 7 from the product 9, the ram 3 rises further by the independent action of the jack pistons 17 even after the knock-out action has been completed, by which the separation of the product from the upper and lower molds 7, 8 is carried out immediately and also instantaneously after forming.
  • the knock-out device of FIG. 6 shows another embodiment. This differs from the first embodiment in which the piston for knock-out and jack pistons are provided in separate cylinders as the piston for knock-out and jack piston are provided one above the other in the same cylinder.
  • the cylinder 14 for the knock-out piston 16 and the cylinder 15 for the jack piston 17 are arranged in a straight line one above the other, the upper surface of the piston 16 for knock-out contact the lower surface of the jack piston 17 and also, the diameter of this cylinder 14 is made large in order to prevent excess rise of the piston 16 for knock-out.
  • the actions of these are the same as those explained above.
  • a knock-out device of impact forming machine comprising, an upper mold and a lower mold disposed at a corresponding position to said upper mold for providing a material disposed on said lower mold with impact forming, a ram supporting said upper mold, a jack mechanism for providing said ram with return motion by which said upper mold is taken from a formed material after impact forming, a knock-out mechanism for knocking-out said formed material from said lower mold at a time between a time of just before and just on time of taking-off said upper mold from said formed material according to said return motion of ram by said jack mechanism, said jack mechanism working with said knock-out mechanism in a combined relation while said taking-off motion of said ram from said formed material and knocking-out motion of said formed material from said lower mold.
  • a knock-out device of impact forming machine comprising, an upper mold and a lower mold disposed at a corresponding position to said upper mold for providing a material disposed on said lower mold with impact forming, a ram supporting said upper mold, a jack mechanism for providing said ram with return motion by which said upper mold is taken from a formed material after impact forming, a knock-out mechanism for knocking-out said formed material from said lower mold at a time between a time of just before and just on time of taking-off said upper mold from said formed material according to said return motion of ram by said jack mechanism, said jack mechanism working with said knock-out mechanism in a combined relation while said taking-off motion of said ram from said formed material and knocking-out motion of said formed material from said lower mold, after said knock-out motion, further providing said ram with upward shifting motion by an individual motion of said jack mechanism.
  • a knock-out device of impact forming machine according to claim 1, further characterized by said jack-mechanism and knock-out mechanism having respective pairs of piston and cylinder working by hydraulic pressure.
  • a knock-out device of impact forming machine further characterized by said jack-mechanism and knock-out mechanism having respective pairs of piston and cylinder working by hydraulic pressure.
  • a knock-out device of impact forming machine comprises, said lower mold having hollow portion, a knock-out member slidably engaging an upper portion of it with said hollow portion of said lower mold so as to form a base surface of said lower mold by a top end of said knock-out member, a cavity disposed at a central position of a base portion of a frame of said impacting machine, a knock-out cylinder having a piston vertically disposed at the central position of said base of said frame, a base portion forming a main body of said knock-out member slidably engaged with said cavity of said frame, an upper end of said piston of knock-out cylinder facing lower end surface of said knock-out member, said piston of said knock-out cylinder provided with a downward extending rod, said rod passing vertically through said base of frame, and an arm secured at a lower end of said rod, in a condition of one-body, thereby, before completion of said impact forming the top end of said knock-out piston is positioned under
  • a knock-out device of impact forming machine comprises, said lower mold having hollow portion, a knock-out member slidably engaging an upper portion of it with said hollow portion of said lower mold so as to form a base surface of said lower mold by a top end of said knock-out member, a cavity disposed at a central position of a base portion of a frame of said impacting machine, a knock-out cylinder having a piston vertically disposed at the central position of said base of said frame, a base portion forming a main body of said knock-out member slidably engaged with said cavity of said frame, an upper end of said piston of knock-out cylinder facing lower end surface of said knock-out member, said piston of said knock-out cylinder provided with a downward extending rod, said rod passing vertically through said base of frame, and an arm secured at a lower end of said rod in a condition of one-body, thereby, before completion of said impact forming the top end of said knock-out piston is positioned under the
  • a knock-out device of impact forming machine further characterized by said jackmechanism comprising a pair of cylinder for jack motion disposed symmetrically at both sides of said knock-out cylinder of knock-out mechanism, each jack piston slidably engaged with said cylinder for jack motion respectively in such a way that an upper end of each jack piston faces the lower surface of said ram respectively, a pair of pushing rods vertically disposed on an arm rigidly secured to said rod of said knock-out mechanism, top ends of said pushing rods facing corresponding lower surface of said jack pistons respectively, thereby, before completion of said impact forming, said jack pistons are positioned at lower dead points, after completion of said impact forming, said cylinders for jack motion are provided with hydraulic pressure, said jack pistons are subjected to shift upward at the same time as the upward lifting of said knock-out piston, after said knock-out member reaches at the utmost upper position, said jack pistons are continued to shift upward and therefore said ram is shifted
  • a knock-out device of impact forming machine further characterized by said jackmechanism comprising a pair of cylinder for jack motion disposed symmetrically at both sides of said knock-out cylinder of lgnock-out mechanism, each jack piston slidably engaged with said cylinder for jack motion respectively in such a way that an upper end of each jackpiston faces the lower surface of said ram respectively, a pair of pushing rods vertically disposed on an arm rigidly secured to said rod of said knock-out mechanism, top ends of said pushing rods facing corresponding lower surface of said jack pistons'respectively, thereby, before completion of said impact forming, said jack pistons are positioned at lower dead points, after completion of said impactlforming, said cylinders for jack motion are provided with hydraulic pressure, said jack pistons are subjected to shift upward at the same time as the upward lifting of said knock-out piston, after said knock-out member reaches at the utmost positions, said jack pistons are continued to shift upward and
  • a knock-out device of impact forming machine further characterized by disposing both pistons of said jack mechanism and knock-out mechanism one above the other 'in the same cylinder,
  • a knock-out device of impact forming machine further characterized by disposing both pistons of said jack mechanism and knock-out mechanism one above the other in the same cylinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • De-Stacking Of Articles (AREA)
US574033A 1965-09-01 1966-08-22 Knock-out device of impact forming machine Expired - Lifetime US3411340A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5376865 1965-09-01

Publications (1)

Publication Number Publication Date
US3411340A true US3411340A (en) 1968-11-19

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ID=12951975

Family Applications (1)

Application Number Title Priority Date Filing Date
US574033A Expired - Lifetime US3411340A (en) 1965-09-01 1966-08-22 Knock-out device of impact forming machine

Country Status (4)

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US (1) US3411340A (enrdf_load_stackoverflow)
DE (1) DE1298498B (enrdf_load_stackoverflow)
FR (1) FR1604812A (enrdf_load_stackoverflow)
GB (1) GB1143753A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370878A (en) * 1981-02-09 1983-02-01 Gulf & Western Manufacturing Company Workpiece ejector system for presses
US4428221A (en) 1982-01-22 1984-01-31 Owens Roland G Transfer apparatus for straight side press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4143176A1 (de) * 1991-12-30 1993-07-01 Hasenclever Maschf Sms Schmiedemaschine
DE59100194D1 (de) * 1991-12-30 1993-09-16 Hasenclever Maschf Sms Schmiedemaschine.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103136A (en) * 1960-11-28 1963-09-10 Warner Swasey Co High energy impact machine
US3108503A (en) * 1960-10-31 1963-10-29 Gen Dynamics Corp High energy rate forming machine
US3138976A (en) * 1958-12-27 1964-06-30 Schloemann Ag Hydraulic forging presses
US3145648A (en) * 1962-04-26 1964-08-25 Trans Energy Corp High energy impact forming machine
US3158048A (en) * 1960-10-25 1964-11-24 Warner Swasey Co Impact machine
US3332273A (en) * 1962-10-15 1967-07-25 Beche Hans Drop forge press or the like with a pressure medium drive

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2314148A (en) * 1940-04-01 1943-03-16 Lefere Forge & Machine Company Press fixture
DE1059268B (de) * 1954-09-13 1959-06-11 Peltzer & Ehlers K G Maschinen Liegende Mehrstufenpresse mit waagerechter Kurbelwelle fuer den Stempelschlitten und uebereinander angeordneten Werkzeugen
FR1402365A (fr) * 1963-07-24 1965-06-11 Kobe Steel Works Dispositif constituant machine de formage à grande puissance ou analogue, et ses diverses applications

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138976A (en) * 1958-12-27 1964-06-30 Schloemann Ag Hydraulic forging presses
US3158048A (en) * 1960-10-25 1964-11-24 Warner Swasey Co Impact machine
US3108503A (en) * 1960-10-31 1963-10-29 Gen Dynamics Corp High energy rate forming machine
US3103136A (en) * 1960-11-28 1963-09-10 Warner Swasey Co High energy impact machine
US3145648A (en) * 1962-04-26 1964-08-25 Trans Energy Corp High energy impact forming machine
US3332273A (en) * 1962-10-15 1967-07-25 Beche Hans Drop forge press or the like with a pressure medium drive

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370878A (en) * 1981-02-09 1983-02-01 Gulf & Western Manufacturing Company Workpiece ejector system for presses
US4428221A (en) 1982-01-22 1984-01-31 Owens Roland G Transfer apparatus for straight side press

Also Published As

Publication number Publication date
FR1604812A (en) 1972-04-17
GB1143753A (enrdf_load_stackoverflow) 1969-02-26
DE1298498B (de) 1969-07-03

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