US3419204A - Web-feeding devices - Google Patents

Web-feeding devices Download PDF

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Publication number
US3419204A
US3419204A US530565A US53056566A US3419204A US 3419204 A US3419204 A US 3419204A US 530565 A US530565 A US 530565A US 53056566 A US53056566 A US 53056566A US 3419204 A US3419204 A US 3419204A
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US
United States
Prior art keywords
web
rollers
feed device
dies
roller
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
US530565A
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English (en)
Inventor
David T N Williamson
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.)
Molins Machine Co Ltd
Original Assignee
Molins Machine Co 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 Molins Machine Co Ltd filed Critical Molins Machine Co Ltd
Application granted granted Critical
Publication of US3419204A publication Critical patent/US3419204A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/004—Arrangements for converting the motion of a material which is continuously fed to a working station in a stepwise motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/261—Handling means, e.g. transfer means, feeding means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • B65H20/04—Advancing webs by friction roller to effect step-by-step advancement of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/24—Advancing webs by looping or like devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4757—Tool carrier shuttles rectilinearly parallel to direction of work feed
    • Y10T83/4763—Both members of cutting pair on same carrier

Definitions

  • This invention relates to apparatus for operating on continuously-fed webs of sheet material. More specifically, the type of apparatus to which the invention is applicable is that type in which a continuously-fed web is subjected to the action of tool means whose operation is intermittent. Such tool means may, during an operating stroke, travel with the web, (either in engagement with an area of the web or in proximity thereto) and upon completion of a desired operation be withdrawn from the web to execute a return stroke in which the tool means is moved in the opposite direction to the movement of the web so that such tool means may 'be brought into engagement with or proximity to a succeeding area of the web to repeat the desired operation thereon.
  • Such apparatus will hereinafter be termed apparatus of the type defined.
  • a convenient example of apparatus of the type defined is a machine for producing moulded articles by drawing from plastic sheet; in such a machine, the tool means comprises male and female dies which are brought into engagement with opposite faces of the sheet and by the application of mechanical and/or fluid pressure draw the sheet into a form determined by the configuration of said dies.
  • a feed device such as a pair of coacting rollers is arranged to propel the web continuousl towards a zone in which the tool means operates, said feed device being mounted for reciprocating movement towards and away from said zone and connected to drive means arranged to produce such recipro cating movement in synchronism with operating and return strokes of the tool means.
  • the operation of the feed device accordingly provides a continuous forward feed of the web (e.g. where the feed device comprise coacting rollers, by rotation thereof) upon which is superimposed a reciprocating movement.
  • the speed at which the web moves into the zone thus varies between the sum of the speeds of the continuous forward feed and of the reciprocating movement and the difference of those speeds.
  • the drive means may be arranged to advance the feed device towards said zone during each operating stroke of the tool means and to retract the feed device during each return stroke of the tool means.
  • the drive means may be arranged to retract the feed device during engagement of the tool means with the web, retraction being effected at such a speed as to reduce the speed of the web through the zone to zero.
  • guide means may be provided to control the position of the web while the slack is present.
  • Such guide means may for example comprise one or more guide rollers arranged or movable mountings so that the web may be allowed to follow a short (e.g.
  • FIGURE 1 shows a possible embodiment of the invention
  • FIGURE 2 shows a modification
  • a web 1 of hot plastic sheet is continuously feed as indicated at 2 towards a Zone in which a pair of embossing dies 3, 4 operate on said web.
  • the die 3 is connected to a supporting frame 5 via a hydraulic actuator 6 capable of producing horizontal movements of said die 3.
  • the die 4 is similarly connected to a supporting frame 7 via a hydraulic actuator 8.
  • the frames 5, 7 are carried on a baseplate 9 by further hydraulic actuators 10, 11 capable of producing vertical movements of the frames 5, 7 (and hence of dies 3, 4).
  • no hydraulic fluid connections to the actuators 6, 8 are shown but such connections will of course be provided from a hydraulic supply unit 12 having a pair of output connections 13 for the said actuators 6, 8.
  • the hydraulic supply unit 12 has a further pair of output connections 14, 15 connected to the actuators 10, 11 so that whenever unit 12 is so operated that connection 14 provides a supply of fluid under pressure While connection 15 provides a fluid return, actuators 10', 11 will lower frames 5, 7 and dies 3, 4 but when the function of connections 14, 15 are reversed said frames and dies will be raised.
  • the operation of actuators 6, 8 lvia connections 13 is such that, while dies 3, 4 are descending, they are held together to emboss web 1, while when said dies are ascending they are held apart to clear web 1, and it will therefore be undertsood that unit 12 contains means for generating pressure in hydraulic fluid and for controlling valves connecting such pressure generating means to the connections 13, 14, 15 to obtain such movement of the dies 3, 4.
  • rollers 16 arranged to grip the web 1 and feed it downward; the rollers 16 are driven by any convenient means (as diagrammatically indicated in FIGURE 1) to feed the web, and are carried by a frame 17 which in turn is supported on a baseplate 18 by a hydraulic actuator 19.
  • the actuator 19 is also connected to the connections 14, of unit 12 so that the frame 17 and rollers 16 move up and down in synchronism with dies 3, 4.
  • the dies have a quick-return action, i.e. they ascend more quickly than they descend, and then the ratio of the descending speed of the dies to the speed of web travel at 2 must equal the ratio of the time for a complete cycle to the time for a descending stroke of the dies.
  • the speeds of descent and ascent of the frame 17 and rollers 16 will of course be dependent on those of the dies.
  • rollers 20, 22 are mounted a group of three guide rollers 20, 21, 22 between which the web 1 travels. Rollers 20, 22 are carried by a stationary frame 23 secured to a baseplate 2-4, while roller 21 is carried by a horizontallyarranged hydraulic actuator 25 secured to a base-plate 26.
  • Actuator 25 is connected to output connections 14, 15 of the unit 12 so that whenever the dies 3, 4 move up, guide roller 21 is moved to the right between and past rollers 20, 22; as it does so, it will be apparent that the web 1 is guided into an increasingly tortuous path, thus avoiding the slack which tends to appear in the web 1 at this time (due to upward movement of frame 17 and rollers 16) from becoming manifest in the form of an uncontrolled loop in the web 1 above rollers 16.
  • Rollers 20, 21, 22 will in general be idler rollers, but if desired (e.g. with very flimsy webs) advantage may be found in driving these rollers at web speed.
  • FIGURE 2 shows an alternative arrangement of the upper part of the apparatus of FIGURE 1 in which the sheet 1 is fed to the apparatus horizontally.
  • rollers 16, 20, 21, 22 there is provided a single roller 16a about which the sheet 1 travels through a right-angle so that on leaving the roller 16a the sheet is travelling downwards (as in FIGURE 1).
  • Roller 16a is carried by a hydraulic actuator 1% (connected in place of actuator 19, FIGURE 1) serving to lift the roller 16a when the downward speed of the sheet is to he reduced and to lower roller 16a when the sheet speed is to be increased.
  • roller 16a When roller 16a is in a raised position, the sheet 1 will of course be travelling round a loop, as indicated by the dashed lines, and for further control of the path of the sheet an idler roller 20a is provided above the path of the sheet as it travels toward roller 16a.
  • Roller 16a is rotationally driven and it is advantageous to make the roller 16a a suction roller, i.e. to have drillings in the roller through which suction is applied to the face of the sheet in contact with said roller so that atmospheric pressure assists in obtaining suificient frictional grip between the roller and the sheet to allow the roller to drive the sheet.
  • suction rollers are wellknown in a variety of applications, e.g. in feeding cigarettes.
  • said guide means comprises at least one guide roller arranged on a movable mounting so that the web may be allowed to follow a short path when no slack is present but is guided along a longer path when slack tends to appear.
  • said feed device comprises a pair of co-acting rollers between which said web is propelled.
  • a feed device including a single roller arranged to propel the web continuously towards a zone in which the tool means operates, said continuously fed web of sheet material approaching said feed device at substantially a right angle tothe direction said web of sheet material leaves said feed device toward said tool means, said feed device being mounted upon reciprocating means capable of moving said feed device towards and away from said zone, and drive means connected to said reciprocating means and arranged to produce such reciprocating movement in synchronism with operating and return strokes of the tool means.
  • a feed device arranged to propel the web continuously towards a zone in Which the tool means operates, said feed device being mounted upon reciprocating means capable of moving said feed device towards and away from said zone, drive means connected to asid reciprocating means and arranged to produce such reciprocating movement in synchronium with operating and return strokes of the tool means, and guide means arranged to control the position of the web upstream of the feed device when slack tends to appear therein.
  • said guide means comprises at least one guide roller arranged on a movable mounting so that the web may be allowed to follow a short path when no slack is present but is guided along a longer path 'when slack tends to appear.
  • said feed device comprises a pair of coacting rollers pe tween which said web is propelled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Robotics (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Advancing Webs (AREA)
US530565A 1965-03-05 1966-02-28 Web-feeding devices Expired - Lifetime US3419204A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB954265 1965-03-05

Publications (1)

Publication Number Publication Date
US3419204A true US3419204A (en) 1968-12-31

Family

ID=9874008

Family Applications (1)

Application Number Title Priority Date Filing Date
US530565A Expired - Lifetime US3419204A (en) 1965-03-05 1966-02-28 Web-feeding devices

Country Status (6)

Country Link
US (1) US3419204A (lt)
BE (1) BE677244A (lt)
CH (1) CH438690A (lt)
GB (1) GB1143544A (lt)
NL (1) NL6602777A (lt)
SE (1) SE342175B (lt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5595335A (en) * 1994-04-25 1997-01-21 Bobst Sa Infeed station for converting a continuously moving web-like sheet into an intermittently fed web-like sheet for a subsequent processing station

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103722738B (zh) * 2012-10-11 2015-12-16 际华三五四三针织服饰有限公司 汽动式臂章热定型机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US552947A (en) * 1896-01-14 Feeding mechanism for paper-box and printing-press machinery
US1489167A (en) * 1922-11-18 1924-04-01 Spiess Georg Producing intermittent movement of webs
US1754502A (en) * 1928-11-16 1930-04-15 Gen Tire & Rubber Co Method of and apparatus for the manufacture of inner tubes and the like
US3121917A (en) * 1961-04-24 1964-02-25 Linear Inc Apparatus for continuous and automatic molding of separate articles
US3267523A (en) * 1964-04-22 1966-08-23 Calmec Mfg Ltd Apparatus for moulding articles from plastics material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US552947A (en) * 1896-01-14 Feeding mechanism for paper-box and printing-press machinery
US1489167A (en) * 1922-11-18 1924-04-01 Spiess Georg Producing intermittent movement of webs
US1754502A (en) * 1928-11-16 1930-04-15 Gen Tire & Rubber Co Method of and apparatus for the manufacture of inner tubes and the like
US3121917A (en) * 1961-04-24 1964-02-25 Linear Inc Apparatus for continuous and automatic molding of separate articles
US3267523A (en) * 1964-04-22 1966-08-23 Calmec Mfg Ltd Apparatus for moulding articles from plastics material
US3271816A (en) * 1964-04-22 1966-09-13 Calmec Mfg Ltd Apparatus for moulding articles from plastic materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5595335A (en) * 1994-04-25 1997-01-21 Bobst Sa Infeed station for converting a continuously moving web-like sheet into an intermittently fed web-like sheet for a subsequent processing station

Also Published As

Publication number Publication date
GB1143544A (lt) 1900-01-01
CH438690A (fr) 1967-06-30
BE677244A (lt) 1966-08-01
NL6602777A (lt) 1966-09-06
SE342175B (lt) 1972-01-31

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