EP0865882A2 - Dispositif à ultrasons pour la coupe en biseau de caoutchouc non vulcanisé - Google Patents

Dispositif à ultrasons pour la coupe en biseau de caoutchouc non vulcanisé Download PDF

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Publication number
EP0865882A2
EP0865882A2 EP98302030A EP98302030A EP0865882A2 EP 0865882 A2 EP0865882 A2 EP 0865882A2 EP 98302030 A EP98302030 A EP 98302030A EP 98302030 A EP98302030 A EP 98302030A EP 0865882 A2 EP0865882 A2 EP 0865882A2
Authority
EP
European Patent Office
Prior art keywords
web
knife
skiver
strip
carriage
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.)
Withdrawn
Application number
EP98302030A
Other languages
German (de)
English (en)
Other versions
EP0865882A3 (fr
Inventor
Michael J. Foster
Richard E. Biller
William G. Earnheart
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.)
Cooper Tire and Rubber Co
Original Assignee
Cooper Tire and Rubber Co
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 Cooper Tire and Rubber Co filed Critical Cooper Tire and Rubber Co
Publication of EP0865882A2 publication Critical patent/EP0865882A2/fr
Publication of EP0865882A3 publication Critical patent/EP0865882A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/045—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/02—Bevelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/14—Means for treating work or cutting member to facilitate cutting by tensioning the work

Definitions

  • the invention relates to a cutting device utilizing an ultrasonic knife in the separation of lengths of strips from a roll of unvulcanized rubber at a low angle from the horizontal surface plane of the strip and at some angle diagonally across the width of the strip.
  • Such devices are commonly termed a skiver.
  • the strip end product requirements demand that the resultant cut ends of the material be dimensionally accurate and statistically consistent.
  • Stationary anvils by nature are placed at or following the cutting edge. Because the knife must have some finite and increasing wedge-like thickness following the cutting edge for structural rigidity, a narrow or narrowing gap is created between the knife and the anvil, producing a pinching or perhaps even some extruding of the material. This produces a very undesirable build-up of unvulcanized material on the knife and/or anvil from the friction and resultant heat. Eventually this action can prevent passage of material through the gap and causes a jam and buckling of material ahead of the knife.
  • a major contribution of the skiver device provided by this invention is the use of a rolling anvil cutting system which has the ability to control the material at the cutting edge of the ultrasonic knife, independent of ancillary devices or forces, with low friction between the system and the material to be cut.
  • Characteristic features of this novel skiver device are accurate positioning of the material in the area immediately preceding the cutting edge of the knife, low friction operation, separation of the sticky edges of the unvulcanized material as the cut progresses, and adaptability to a wide range of various cutting conditions and configurations of the cut edge.
  • This new skiver device is comprised of the following major elements: 1) an ultrasonic knife and its holder; 2) an upper floating roller assembly with a material lead-in device which guides the material to the knife blade; 3) a roller anvil assembly with material lead-in and support rollers, which provides support of the underside of the material during cutting; 4) an upper material separation device, and 5) a lower material separation device, which cooperate to keep apart the edge of the material supply roll and the edge of the severed strip as the cut progresses.
  • All of these elements are supported from a traversing carriage which moves along a rail.
  • the rail in turn is supported transversely with respect to a path along which a web of uncured rubber material is guided as the material is fed from a supply roll.
  • the rail extends at a predetermined angle to the web path so as to make a diagonal cut across the web material, but the cut could be perpendicular to the edges of the web.
  • the knife is supported to cut the web material at an acute angle to the surfaces of such material, e.g. a skive type of cut.
  • the principal object of the invention is to provide a skiver device which incorporates a roller anvil assembly and an upper floating roller assembly, supported in close association with a skiver knife (preferably an ultrasonically excited knife) to control closely the positioning of a web of uncured rubber material from which the skiver knife will sever strips of predetermined length; to provide material separation devices which keep the edges of material apart as the severing action proceeds; and thus to provide accurate and consistent separation of the strips from the web.
  • a skiver knife preferably an ultrasonically excited knife
  • Figs. 1, 2 and 3 web W of uncured rubber material is shown with the skiver device 10 of the invention located to the outside of one edge of the web, preparatory to moving across the web so as to sever strip 11 from the free or leading edge of the web.
  • the severed strip will become a component in a tire assembling and manufacturing operation, as by wrapping the strip around a tire carcass such that the skived ends of the strip are joined together.
  • the skiver device is suspended from a traversing carriage 12 which is moved (e.g. driven) along a rail 14 (Fig. 3) by a reversible motor 15 which powers a rotary to linear actuation mechanism, e.g.a ball screw mechanism 16.
  • Arm 18 extends forward and downward from carriage 12 to provide a rigid depending support for the skiver device 10 and its various parts.
  • the motion of carriage is considered to be from side to side, e.g. from right to left as seen in Figs. 1 and 2.
  • the parts of the skiver device nearest to the carriage are considered as at the back, to the right in Fig. 3, and the parts farthest from the carriage are considered as at the front, to the left in Fig. 3.
  • Rail 14 may be an I-beam, so as to define a rigid support and a precise path of motion for the skiver device.
  • Brackets 17 extend from carriage 12, and include linear bearings 19 which engage the flanges of rail 14, and also include the follower of a rotary to linear actuation mechanism 15. Any equivalent linear drive device can be used in place of the ball screw mechanism.
  • the web W is advanced intermittently in increments which determined the length of the severed strips. This feeding movement of the web is generally from top to bottom in Fig. 1 and 4, from right to left in Fig. 3, and from the back to the front in Fig. 2.
  • the web W is fed or advanced the predetermined increment with the skiver device to one side (the right side in Figs. 1 and 2), the web is halted, and the skiver device is driven across the web, along rail 14.
  • the knife as the skive progresses, severs the strip from the web with an acutely angled cut, as shown in Fig. 9.
  • the absolute vertical location of the web material relative to the skiver device is not critical, since as the skiver approaches the uncut material, it directs the material to the opening or gap between the roller anvil assembly 20 and the upper floating roller assembly 30, in a low friction manner with the web captured for close control of the material at the cut edge as the skiver progresses across web W.
  • the knife 50 excited by an ultrasonic driver D, has its cutting edge 52 located in the gap where the upper floating roller and lower roller anvil assemblies 20, 30 face the line of severance of strip 11 from web W.
  • Narrow individual rollers 22 in the roller anvil assembly 20, and similar rollers 32 in the upper floating roller assembly 30, not only reduce friction, but also allow for the optimization of the shear angle to knife relationship required by a given cutting situation. In this instance, a solid roller of the approximate width of the knife would produce unacceptable friction.
  • rollers 22 are relatively thin disc-like members preferably made of a plastic material (such as Teflon), supported for free rotation in holders 24 which are arranged in a stack within a support frame 25, the stack being disposed in an angular array with respect to carriage 12 and its path of motion along rail 14. Arms 24 are retained in frame 25, so as to allow each roller 22 independent rotating motion against the underside of the material just ahead of the location of the angled cut, i.e. the cutting edge 52 of the ultrasonically excited knife 50, as the action proceeds, right to left as viewed in Figs. 1 and 2.
  • the tops of rollers 22 are tangent to the underside of web W, and displaced along a line which is parallel to knife edge 52, thus providing the free rolling array moving along the web underside as the knife approaches and moves across (through) the web material.
  • Placement of the rolling anvil assembly 20 immediately forward of the knife edge 52 introduces the material at the proper location relative to the knife cutting edge and does not require other devices at, or following, the cutting edge which (as mentioned) might tend to hinder the operation.
  • the narrow individual rollers 32 in the upper floating guide assembly are captured in C-shaped cavities 33 at the ends of arm-like holders 34, which are angularly stacked and individually pivotally supported within a frame 35 which is mounted to carriage 12 by arm 36.
  • Upper rollers 32 are thus arranged in an array complementary to the anvil rollers and will rest upon, and roll along, the upper surface (or top side) of web W.
  • the entire frame and roller/holder assembly is pivoted to arm 36 through a bushing support 37, so the entire assembly can be raised for access purposes.
  • the upper floating rollers 32 rest oil the upper surface of web W, and each roller 32 is independently rotatable and also movable in a rocking type floating motion against the web.
  • This provides control of the material by holding it down against the roller anvil 20 and toward the cutting edge 52 of knife 50.
  • the skiver device thus enters the web W of material at an angle which is determined by the desired skive type of cut without loss of control; the control is maintained on stepped or tapered edges.
  • the skiver device also accomplishes separation of the cut ends of the web material, without tensioning or stretching, past the cut made at the knife edge. This is accomplished by dislocation (vertical dislocation or separation in the illustrated embodiment) of the material immediately following the cut.
  • dislocation vertical dislocation or separation in the illustrated embodiment
  • Four sets of endless friction driven belts are supported about-freely rotatable rollers, and engage the top and underside of the strip being cut and of the web, tending to separate those edges so they do not rejoin as they pass beyond knife 50.
  • upper belt 60 is supported on and around rollers 62 and moves along the cut edge of the web preceding the anvil assembly, and depressing that portion of web W due to the lower path of belt 60 extending below the level of web W (see Fig. 2) in the region of the anvil immediately following the knife cutting edge 52.
  • Lead-in belts 65 are mounted on and supported by or around rollers 66 front and back of the roller anvil assembly, and will guide the underside of web W as the knife edge approaches.
  • a following belt 70 supported on and around rollers 72 engages the underside of the severed strip 11, and helps to guide that edge of the strip upward onto the tapered roller 75 which is freely rotatably mounted on the rolling anvil, following the knife edge.
  • Such dislocation moves the material away from the knife surfaces, preventing friction, heating, and build-up of material on these surfaces. This action also reduces dampening of the ultrasonic vibration induced in the blade by driver D.
  • the material above the knife (the cut edge of strip 11) is raised and supported as the skiver travels forward across the web material.
  • the material below the knife (the cut edge of web W) is dislocated or deflected downward.
  • This arrangement also provides a compact, low friction means to facilitate clearance between the material and the knife assembly with its holder.
  • the entire skiver device unlike the stationary anvil types, is removed from the area of material flow at both ends of its travel, since rail 14 extends beyond the sides of web W, thereby facilitating and not hindering conveying or transfer devices for the web and/or the severed strips.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
EP98302030A 1997-03-20 1998-03-18 Dispositif à ultrasons pour la coupe en biseau de caoutchouc non vulcanisé Withdrawn EP0865882A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82164697A 1997-03-20 1997-03-20
US821646 1997-03-20

Publications (2)

Publication Number Publication Date
EP0865882A2 true EP0865882A2 (fr) 1998-09-23
EP0865882A3 EP0865882A3 (fr) 1999-05-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98302030A Withdrawn EP0865882A3 (fr) 1997-03-20 1998-03-18 Dispositif à ultrasons pour la coupe en biseau de caoutchouc non vulcanisé

Country Status (3)

Country Link
EP (1) EP0865882A3 (fr)
JP (1) JPH10309693A (fr)
CA (1) CA2232797A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104972493B (zh) * 2015-06-30 2016-08-24 重庆市金盾橡胶制品有限公司 一种胎面分离切割机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1914528A (en) * 1929-12-31 1933-06-20 Dunlop Tire & Rubber Corp Cutting fork
US2216108A (en) * 1939-05-05 1940-10-01 Edward H Brockway Sheet material portable trimmer
US2609049A (en) * 1947-11-08 1952-09-02 Western Electric Co Method of and apparatus for slitting articles
US3608412A (en) * 1970-01-19 1971-09-28 Goodyear Tire & Rubber Tread slitter
US4979411A (en) * 1988-06-27 1990-12-25 Central Glass Company, Limited Device and method for cutting superfluous edge portion of interlayer of laminated glass
EP0483973A2 (fr) * 1990-10-31 1992-05-06 General Tire Inc. Système de coupe ultrason
EP0714740A1 (fr) * 1994-10-28 1996-06-05 The Goodyear Tire & Rubber Company Dispositif pour couper une bande en élastomère telle qu'une bande de roulement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1914528A (en) * 1929-12-31 1933-06-20 Dunlop Tire & Rubber Corp Cutting fork
US2216108A (en) * 1939-05-05 1940-10-01 Edward H Brockway Sheet material portable trimmer
US2609049A (en) * 1947-11-08 1952-09-02 Western Electric Co Method of and apparatus for slitting articles
US3608412A (en) * 1970-01-19 1971-09-28 Goodyear Tire & Rubber Tread slitter
US4979411A (en) * 1988-06-27 1990-12-25 Central Glass Company, Limited Device and method for cutting superfluous edge portion of interlayer of laminated glass
EP0483973A2 (fr) * 1990-10-31 1992-05-06 General Tire Inc. Système de coupe ultrason
EP0714740A1 (fr) * 1994-10-28 1996-06-05 The Goodyear Tire & Rubber Company Dispositif pour couper une bande en élastomère telle qu'une bande de roulement

Also Published As

Publication number Publication date
JPH10309693A (ja) 1998-11-24
CA2232797A1 (fr) 1998-09-20
EP0865882A3 (fr) 1999-05-06

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