US3545007A - Tablet making machine - Google Patents

Tablet making machine Download PDF

Info

Publication number
US3545007A
US3545007A US821052A US3545007DA US3545007A US 3545007 A US3545007 A US 3545007A US 821052 A US821052 A US 821052A US 3545007D A US3545007D A US 3545007DA US 3545007 A US3545007 A US 3545007A
Authority
US
United States
Prior art keywords
punch
cam
die
roller
axis
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
US821052A
Other languages
English (en)
Inventor
William H Hamilton
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.)
Pennwalt Corp
Original Assignee
Pennwalt Corp
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 Pennwalt Corp filed Critical Pennwalt Corp
Application granted granted Critical
Publication of US3545007A publication Critical patent/US3545007A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B30B11/08—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 moulds carried by a turntable

Definitions

  • This invention relates to rotary tabletting presses, more particularly, the invention relates to an improved cam structure for guiding the movements of tablet-forming punches contacted thereby.
  • Conventional tablet making machines comprise a rotary die table in which is formed an annular series of die cavities. Above and below the die table an annular series of upper and lower punches are carried for rotation with the die table, there being one upper punch and one lower punch associated witn each die cavity.
  • the heads of the punches may be guided by stationary camming surfaces to control their reciprocating movements, into and out of the die cavity, as the die table turns through filling, compression, and ejection stations.
  • a roller pivotally mounted for free, rotation about an upright axis may be installed at such locations on the cam track, wtih an offcenter portion of its circular end face rather than its cylindrical edge face being positioned for engagement with the punch head.
  • the punch head inflicts appreciably less frictional wear on the margin of the circular end face of the roller than it would cause to a totally stationary cam surface.
  • the end surface of the improved cam roll may be flat or preferably slightly rounded, the desired dwell time is obtainable at a critical location.
  • the increased dwell time provided by the present invention accomplishes improved results, as evidenced by the better United States Patent 3,545,007 Patented Dec. 1, 1970 ice tablet produced by the apparatus. Tablets that are produced with increased dwell time during compression are aerated more thoroughly. The fine particles of tablet material are better oriented in the die cavity, and they are compressed more gradually under reduced pressure. Consequently, the resultant tablets are free of cracks and laminations, and the reduced stress on the mechanical forming parts extends their useful life, even at higher operational speeds.
  • FIG. 1 is a vertical sectional view taken through a portion of a tabletting machine embodying the invention, with portions shown in elevation;
  • FIG. 2 is a view looking in the direction of the arrows 2-2 of FIG. 1 at the surface of a camming roll;
  • FIG. 3 is a view similar to FIG. 2, but looking in the direction of the arrows 3-3 of FIG. 1.
  • the die table is designated by the numeral 10, it being understood that it is mounted for rotation about a vertical axis together with a carrier 12 for upper punches, one of which is illustrated and designated by the numeral 14.
  • Lower punch 16 is representative of the annular series of like punches carried by the die table 10.
  • Upper and lower cam structures 18 and 20 are stationarily mounted above the carrier 12 and below the table 10, respectively, for guiding the movements of their associated punches in vertical direction.
  • Each lower punch 16 is slidably received in a vertical bore 22 for reciprocating movement in vertical direction.
  • the upper end or tip of the lower punch 16 projects upwardly into a die cavity of a die 24, the latter being held in a counterbore aligned with the bore 22.
  • the upper surface of die 24 is flush with the top of the die table 10.
  • the upper punch 14 is slidably received in a vertical bore 26 in the carrier 12 aligned with the bore 22.
  • the lower end or tip of the reciprocating upper punch 14 is movable into and out of the mouth of die 24 for closing and opening the die cavity, respectively.
  • the upper and lower punches 14 and 16 coact with the die 24 for receiving in the die cavity a charge of material to be compacted into a tablet, also for compressing the charge, and ejecting the tablet 28 formed between their tips.
  • the vertical movements of the upper punch 14 are controlled by guiding the motions of its integral punch head 30 with the upper cam structure 18.
  • the vertical movements of the lower punch are controlled by guiding the motions of its integral punch head 32 with the lower cam structure 20.
  • the upper and lower punches 14 and 16 travel in an arcuate path about the vertical axis of rotation of the die table 10, their respective paths being shown by phantom line A in FIG. 2 and by phantom line B in FIG. 3.
  • FIG. 1 illustrates the positions of parts during final compression of a table 28.
  • the upper punch 14 has been guided by its head 30 with a stationary punch lowering track 34 into sliding engagement with upper cam roll 36.
  • the head of lower punch 16 is sliding engagement with lower cam roll 38 after guidance by a stationary weight adjusting cam 40.
  • cam rolls 36 and 38 are of similar construction, being generally mushroom shaped parts, each with a shaft 42 received in the bore of a supporting element 44. Like reference numerals are employed to designate correspondingly similar parts of the cam rolls 36 and 38.
  • Each cam roll has a roller 46 with a broad end surface 48 and which is pivotally mounted on its shaft 42 by ball or roller bearings 50.
  • sliding friction between the head 30 of upper punch 14 and the upper cam structure is reduced considerably by guiding this punch head 30 with a roller 46 pivotally mounted on a shaft 42 with a vertical rotational axis during compression of a tablet 28.
  • Punch 14 travels arcuate path A across the rounded, broad, end surface 48 at the marginal portion thereof.
  • the frictional contact between the moving punch head 30 and the end surface 48 of roller 46 applies an unbalanced force to the roller 46 which causes it to rotate freely on its bearing 50, thereby minimizing wear of the surface 48.
  • path A of the punch'14 is directed away from rotational center of the roller 46.
  • cam roll 38 with respect to lower punch 16 is basically similar to its upper counterpart, the path B of punch 16 being along the margin of its roller 46 on surface 48 and displaced from the rotational axis of its pivot shaft 42.
  • roller 46 of cam roll 38 is pivotally mounted on its shaft 42 for movement about an axis inclined to the vertical on the order of 8 to 10 degrees. The angular inclination can be substantially more or less than in this illustration, however.
  • the broad fiat surface 48 of the lower cam roll 38 is inclined a like amount to the horizontal, thereby providing a gentle incline for the punch head 32 which guides the lower punch 16 further into the die cavity for completing compressibn of the tablet 28 with minimum scufling of the cam and follower surfaces here involved.
  • the cam roll 38 is disposed in bridging position between adjacent stationary cam surfaces along path B.
  • the invention is not limited to any particular location in a tabletting machine, even though it has been shown applied to a final compression station.
  • a cam roll of the type disclosed herein can be used for such other camming functions as ejection, precompression and the like.
  • the invention has been shown and described with the shaft 42 mounted on a fixed supporting element 44 it lends itself to mounting on vertically adjustable supporting elements either independently or, for example, in the manner of the prior art cam disclosed in the patent previously cited herein.
  • roller 46 of the present invention is mounted for pivotal movement about an axis extending in the same general direction as the axis of the table 10; and the roller axis extends through the end surface 48 thereof that is engageable with a punch, the roller axis being substantially normal to the end surface.
  • a tabletting machine including. a die table mounted for rotation about an axis, a die in said die table,
  • a tabletting machine as in claim 1 in which the pivotal axis of said roller is parallel to the rotational axis of said die table.
  • a tabletting machine as in claim 1 in which the pivotal axis of said roller is at an angular inclination to the rotational axis of said die table corresponding to the angle of incline presented by said end surface to said punch.
  • a tabletting machine as in claim 1 in which said cam roll has a shaft and roller bearings between said roller and said shaft.
  • a tabletting machine as in claim 1 in which a second punch is provided for coaction with the first mentioned punch, and a second cam roll for guiding the second punch, the pivotal axis of said first cam roll being parallel to the rotational axis of said die table, and the pivotal axis of said second cam roll being at an angular inclination to the rotational axis of said die table.
  • a tabletting machine as in claim 6 in which the inclined surface presented by said end surface is disposed in bridging position between adjacent stationary cam surfaces of said cam structure.
  • a tabletting machine as in claim 1 in which the rotational axis of said die' table is vertically disposed, and in which said cam roll is vertically adjustable for selectively positioning the end surface of said roller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Medicinal Preparation (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Gears, Cams (AREA)
  • Transmission Devices (AREA)
US821052A 1969-05-01 1969-05-01 Tablet making machine Expired - Lifetime US3545007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82105269A 1969-05-01 1969-05-01

Publications (1)

Publication Number Publication Date
US3545007A true US3545007A (en) 1970-12-01

Family

ID=25232375

Family Applications (1)

Application Number Title Priority Date Filing Date
US821052A Expired - Lifetime US3545007A (en) 1969-05-01 1969-05-01 Tablet making machine

Country Status (5)

Country Link
US (1) US3545007A (fr)
JP (1) JPS5024336B1 (fr)
BE (1) BE749768A (fr)
DE (1) DE2021416A1 (fr)
GB (1) GB1312274A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681266A (en) * 1986-01-21 1987-07-21 Phillips Petroleum Company Method of particulating agglomerated catalyst materials
US5158728A (en) * 1991-04-12 1992-10-27 Elizabeth-Hata International, Inc. Multi-layer medicinal tablet forming machine and method for using the same
US5213818A (en) * 1990-05-21 1993-05-25 I.M.A. Industria Machine Automatiche S.P.A. Device for taking and conveying tablets coming out of a rotary tabletting machine
WO2004050339A1 (fr) * 2002-12-04 2004-06-17 Shobana Kamineni Specification complete d'un systeme d'unite de compression utilise afin de fabriquer instantanement un lot sur demande
CN113910668A (zh) * 2021-10-04 2022-01-11 丽申药业股份有限公司 一种复合酶片剂生产制备方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512655A1 (de) * 1994-07-08 1996-01-11 Temic Bayern Chem Airbag Gmbh Auswurfstation für eine Rundlauf-Tablettenpresse
JP2003136297A (ja) * 2001-11-06 2003-05-14 Sugawara Seiki Kk ロータリープレスにおける加圧機構

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1435599A (en) * 1921-03-31 1922-11-14 Gaillard Theophile Press for making pastils and other similar products
US2166192A (en) * 1936-04-14 1939-07-18 Charles H Whittemore Tablet making machine
US3408963A (en) * 1967-05-02 1968-11-05 Pennsalt Chemicals Corp Tablet machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1435599A (en) * 1921-03-31 1922-11-14 Gaillard Theophile Press for making pastils and other similar products
US2166192A (en) * 1936-04-14 1939-07-18 Charles H Whittemore Tablet making machine
US3408963A (en) * 1967-05-02 1968-11-05 Pennsalt Chemicals Corp Tablet machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681266A (en) * 1986-01-21 1987-07-21 Phillips Petroleum Company Method of particulating agglomerated catalyst materials
US5213818A (en) * 1990-05-21 1993-05-25 I.M.A. Industria Machine Automatiche S.P.A. Device for taking and conveying tablets coming out of a rotary tabletting machine
US5158728A (en) * 1991-04-12 1992-10-27 Elizabeth-Hata International, Inc. Multi-layer medicinal tablet forming machine and method for using the same
US5460827A (en) * 1991-04-12 1995-10-24 Elizabeth-Hata International, Inc. Elongated cylindrical medicinal tablet having two layers
WO2004050339A1 (fr) * 2002-12-04 2004-06-17 Shobana Kamineni Specification complete d'un systeme d'unite de compression utilise afin de fabriquer instantanement un lot sur demande
CN113910668A (zh) * 2021-10-04 2022-01-11 丽申药业股份有限公司 一种复合酶片剂生产制备方法

Also Published As

Publication number Publication date
DE2021416A1 (de) 1970-11-05
BE749768A (fr) 1970-10-30
GB1312274A (en) 1973-04-04
JPS5024336B1 (fr) 1975-08-14

Similar Documents

Publication Publication Date Title
US3545007A (en) Tablet making machine
US3773446A (en) Device for moulding parts to be sintered
US3561054A (en) Powder compacting press
KR102132272B1 (ko) 올담링의 가공지그
CN110523836A (zh) 一种带旋转自锁装置的联动冲压模具
US3408963A (en) Tablet machine
US4658615A (en) Roller flanging machine for metal strips and the like
US10343363B2 (en) Punch for a rotary press
US2949082A (en) Tablet machine
JPH0584277A (ja) 回転式粉末成形機の杵
US2742668A (en) Apparatus for the briquetting of dustlike or fine-grained material
JPH0262360B2 (fr)
CN208962492U (zh) 3d打印机拍打装置和包含该拍打装置的3d打印机
US2795199A (en) Method and apparatus for the production of coated tablets
EP0502734A2 (fr) Presse pour la fabrication de tablettes
US4554952A (en) Severing apparatus for a loom
EP1426322B1 (fr) Tête de support de mors d'une boucheuse
US4069698A (en) Arrangement for forming form pieces by point rolling
CN110404989A (zh) 盘筒拉拔机的压紧辊调节机构
US1844700A (en) Rotary tablet or briquetting machine
USRE30319E (en) Tabletting machines
US964925A (en) Bottle-capping machine.
US1221878A (en) Briqueting-machine.
SU959883A1 (ru) Ротационно-ковочна машина
SU588048A1 (ru) Устройство дл подачи штучных заготовок в рабочую зонц пресса