US2991498A - Method and apparatus for finishing belts - Google Patents

Method and apparatus for finishing belts Download PDF

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Publication number
US2991498A
US2991498A US721169A US72116958A US2991498A US 2991498 A US2991498 A US 2991498A US 721169 A US721169 A US 721169A US 72116958 A US72116958 A US 72116958A US 2991498 A US2991498 A US 2991498A
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US
United States
Prior art keywords
belt
cords
belts
neutral axis
finishing
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
US721169A
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English (en)
Inventor
Rockoff Joseph
Dale L Waugh
Walter E Huber
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.)
Day International Corp
Original Assignee
Dayco 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
Priority to NL237029D priority Critical patent/NL237029A/xx
Priority to NL123509D priority patent/NL123509C/xx
Application filed by Dayco Corp filed Critical Dayco Corp
Priority to US721169A priority patent/US2991498A/en
Priority to GB5961/59A priority patent/GB874983A/en
Priority to US92433A priority patent/US3200662A/en
Application granted granted Critical
Publication of US2991498A publication Critical patent/US2991498A/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
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/10—Driving belts having wedge-shaped cross-section
    • 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
    • Y10S425/806—Flash removal
    • 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
    • Y10S425/818—Belt

Definitions

  • This invention relates to a method and apparatus for finishing belts, and particularly V-belts.
  • V-belts are made by numerous methods as, for example, those described in U.S. Patents No. 2,711,778, No. 2,726,- 976 and No. 2,773,540, issued to Dale L. Waugh, one of the present co-inventors.
  • a belt consisting of a trapezoidal cross section, commonly termed a V-belt, may be manufactured.
  • Such a belt usually consists of an inner or compression section, an outer or tension section and a strength section located between the other sections, often referred to as a neutral axis portion.
  • the neutral axis portion-which actually carries the load during the operation of the V-belt comprises longitudinally extending cords embedded in cushioning layers. It is these cords which may be composed of the synthetic fibers.
  • a conventional belt method which results in the so-called raw edge belt such as illustrated in FIGURE of the last of the aboveenumerated patents, is made by spinning the cords longitudinally of the belt in a sleeve as described in the patents. The individual belts are then cut out of the sleeve with the result that some of the cords are skived and exposed along the sloping edges of the finished belt. This is necessarily true, of course, because the spinning operation causes the cords to be laid in a helical fashion while the cutting operation is at right angles to the axis of the belt sleeve. It has been found that operation of these belts in pulleys tends to cause the exposed fibers in the cords to ravel slightly.
  • a further object is to provide adjustments on such a machine in order to quickly perform the necessary operation on belts having a variety of cross sections.
  • FIGURE 1 is a perspective. view of thepreferred form of the apparatus which is the subjectof the present invention.
  • FIGURE 2 is a view partially in cross section showing a portion of the apparatusnuring operation.
  • FIGURE 3 is a cross-sectional view of a typical V belt
  • FIGURE 4 is a perspective view of a modificationof a portion of the apparatus shownin FIGURE 1.
  • the novel apparatus 11 consistsof a bench-like structure composed-of a pair of vertical legs 12 and 13, and a top 14 and shelf 15, both extending horizontally between the legs.
  • a bracket 16 which is attached by means of welding, bolting, or other conventional means.
  • This bracket is of the right angle type and mounted on the horizontal portion thereof is a heater block 17.
  • the heater block 17 consists of a block of metal which'is highly conductive and has a. pair of strip'heaters mounted on the sides thereof by means of 'distance to form a rectangular opening 21.
  • a thermostat tube 22 is mounted within the lower portion of the block in order to provide a thermostatic control for the heater.
  • a vertical bracket 23 is also mounted on the top and has a yoked configuration at its upper surface.
  • a horizontally extending arm 24 is mounted in this yoke and is secured by means of pin type bearings 25.
  • a bracket 26 which extends at right angles thereto.
  • This bracket in turn has a pair of downwardly depending yoke arms 27 in each of which is mounted a rotatable pressure wheel 28 by means of bearings 29.
  • Another yoke 30 which is attached .to the end of the arm by means of the bearing 31.
  • Ex,- tending downwardly from the yoke is a shaft 32 which acts as a piston within the cylinder 33. This cylinder and piston are actuated by air pressure or hydraulic means (not shown) which are conventional and need not be described here. The operation of this portion of the device will be described later.
  • a bracket 34 is mounted on the upper portion of the leg 13 which extends above the top 14. On this bracket is mounted a bearing 36 carrying shaft 35 which is' freely rotatable therein.
  • a pulley 37 is mounted on the shaft 35 by conventional fastening means, and is rotatedfiby means of belt 38 which runs to another pulley 39 mounted on a motor 40.
  • This motor is mounted on the'shelf 15 as shown.
  • the motor 40 includes a variable speed device in order to control the rotation of the pulley 37.
  • a shaft or piston 42 actuated by hydraulic or pneumatic means from the same-source as that which actuates cylinder 33.
  • a bearing box 43 which is slidably mounted in the slot .48 of thetop 14.
  • a rotatable shaft 44 is mounted in the bearing box 43 and carries upon it a pulley 45. The pulleys 37 and 45 are so aligned that a belt upon which work is to be performed may freely pass around them while passing through the heater block 17.
  • the cylinder 41 is again actuated in the opposite direction until the belt is taut, approximating its condition when used in its ultimate installation;
  • the belt merely rides within the opening in the heater block-17 so that the sloping portions of the sides 20 are contiguous with the sloping sides of the belt, but are not in contact with the entire side area, due to the vertical configuration of the lower portion of the opening.
  • the cylinder 33 is next actuated in such a fashion that the shaft 32 is extended upwardly thus causing the arm- 24 to pivot about bearings 25 and lower the assembly consisting of bracket '26, yoke arms 27 and wheels 28.
  • the actuation of the cylinder is stopped as soon as the wheels are in contact with the upper surface of the belt as shown in FIGURE 2, thereby causing an even contact to exist between the sloping sides of the belt and the heater block.
  • the motor 40 is next actuated by conventional switch means, drawing its power from a conventional electrical source (not shown). This causes the pulley 39 to rotate and by means of belt 38 to drive the pulley 37. This in turn causes the belt 46 to travel around the pulleys and through the heater block.
  • the strip heaters 18 are then actuated by a heating source (not shown), preferably electrical in nature and capable of providing a temperature of 600 to 700 degrees Fahrenheit.
  • the thermostat tube 22 maintains the desired temperature.
  • the belt is now operating at a speed of between one and two inches per second, preferably approximately one and one-half inches per second.
  • the speed is fairly critical, as it hasbeen found that speed which is too slow will cause the rubber or the cords 47 to be exposed to excessive heat. On the other hand, a speed greater than this will not provide proper exposure of the cords to the heat and will not permit the fibers to melt properly. It is believed that the success of the operation is due to the fact that the temperatures applied against the cords 47 are, as stated previously, in the range of 600 to 700 degrees Fahrenheit, which is well above the melting temperature of 480 degrees Fahrenheit for polyester fibers.
  • the high temperature causes the short loose ends of the fibers to be melted off and also provides a partial fusion or weld between the exposed portion of the cord and the belt adjacent thereto. As a result of this operation, the frayed ends are thus removed and a smooth surface results, avoiding the previously described seizing of the cords.
  • FIGURE 4 An adjustable heater block 50 is substituted for the heater block 17 of the principal form of the invention. All other portions of the apparatus are identical.
  • the heater block 50 instead of being unitary, is composed of two members 51 and 52.
  • the member 51 has a pair of vertical brackets 53 and between these brackets is mounted an upper portion 54, having a shaft 55 integrally attached thereto andmounted on the bracket 53.
  • a ratchet 56 and an indicator 57 tached to the shaft 55 is a ratchet 56 and an indicator 57.
  • a flexible stop 59 is mounted on the bracket 53 and a plurality of markings 58 are attached or stamped on the lower portion of the bracket 53 in such a fashion that the indicator 57 is adjacent thereto.
  • the portion 54 of the heater is capable of rotation as the shaft passes through the bracket. As the shaft rotates so does the ratchet 56 and indicator 57 until it is held in position by means of the flexible stop 59.
  • the markings on the bracket it is possible to obtain a reference as to the position of the member.
  • the member 54 is heated in similar fashion to the heater block of the principal form, although this heater strip is not shown.
  • the other member 52 of the heater block has a structure which is identical to that of the member 51. This consists of a pair of vertical brackets 60, upper portion 61, shaft 62, ratchet 63, and indicator 64, all capable of rotation.
  • the markings 65 and stop 66 perform the same function just described.
  • the strip heaters 67 mounted by means of screws 68 or other conventional fastening members, are similar to the strip heaters 18 of the principal form.
  • the two members 51 and 52 are interconnected by means of a helically treated shaft 69 such as that commonly used for driving jaws of a vise. It is possible, therefore, by rotating the member 69 to actuate the members toward or away from each other similar to the action that occurs in a vise or in portions of a lathe. By combination of this transverse movement of the members and the rotation of the upper portions of the members, it is possible to obtain a contact with a V-belt of almost any height, width, or included angle.
  • the type of contact desired is similar to that shown in FIGURE 2 in which the cords of the belt are contiguous with the heated members.
  • the device shown will easily accommodate belts having included angles between 25 and 40 degrees, which is sufficient to operate on the entire low range of V-belts in comon use.
  • the position shown in FIGURE 4 is midway of the extreme positions, and is, therefore, set at approximately 35 degrees.
  • the novel apparatus consists of a device which can selectively apply heat to these cords while the belt operates at such a speed that the frayed ends of the cords are sealed without damaging the remainder of the belt. The operation occurs at a sufiiciently high speed to make this process extremely feasible and economical.
  • the novel apparatus and method further enables an operator to finish belts of any desired length, width, height, or included angle with great dexterity and ease.
  • An apparatus for finishing an endless belt having strength cords embedded in the neutral axis portion thereof comprisingmeans for continuously driving said belt and means mounted adjacent the sides only of said belt for applying heat to said sides in the area of said neutral axis portion.
  • An apparatus for finishing an endless belt having strength cords embedded in the neutral axis portion thereof comprising means for continuously driving said belt, means mounted adjacent the sides only of said belt for applying heat to said sides in the area of said neutral axis portion, and means for holding said belt in contact with said heat applying means.
  • said belt holding means comprises a movable pressure device against the outer surface of said belt in the area of said heat applying means.
  • An apparatus for finishing an endless belt having strength cords embedded in the neutral axis portion thereof comprising a driving and a driven pulley over which said belt may be passed during the finishing operation, said driven pulley adjustable toward and away from said driving pulley, and means mounted between said pulleys for applying heat to the sides only of said belt in the area of the neutral axis portion.
  • An apparatus for finishing an endless V-belt having strength cords embedded in the neutral axis portion thereof comprising means for continuously driving said belt and opposed heating members adjacent the sides only of said belt for applying heat thereto in the area of said neutral axis portion, said heating members capable of both angular and axial adjustment.
  • An apparatus for finishing an endless V-belt having strength cords embedded in the neutral axis portion thereof comprising means adjustable to varying belt lengths for continuously driving said belt, means mounted adjacent said belt for applying heat to the sides only thereof in the area of said neutral axis, said means angularly and radially adjustable to accommodate varying belt widths and angles, and movable pressure means mounted above said heat applying means for holding said belt in contact with said heat applying means.
  • An apparatus for finishing an endless belt having strength cords embedded in the neutral axis portion thereof including a structural member; means mounted on said member for continuously driving said belt comprising a driving means, a driving pulley operated by said driving means, and a driven pulley adjustable toward and away from said driving pulley; means mounted on said member between said pulleys for applying heat to the neutral axis portion comprising a pair of heating blocks capable of individual angular and axial movement to permit adjustment thereof; means mounted on said member adjacent said heat applying means for maintaining pressure of said belt against said heating blocks comprising reciprocating actuating means and a pivotable pressure arm attached thereto and actuated thereby, said arm contacting the outer surface of said belt during said finishing operation.
  • a method of finishing an endless belt having strength cords embedded in the neutral axis portion thereof comprising the steps of continuously driving said belt and applying heat against the sides only of said belt in the area of said neutral axis portion.
  • a method of finishing an endless belt having strength cords embedded in the neutral axis portion thereof comprising the steps of continuously driving said belt and applying heat against the sides only of said belt in the area of the neutral axis portion while applying radial pressure to the outer surface of said belt.
  • a method of finishing an endless belt having partially exposed strength cords embedded in the neutral axis portion thereof comprising the steps of continuously driving said belt at a speed of approximately one and onehalf inches per second, applying heat in the range of 600 to 700 degrees Fahrenheit to the sides only of said belt to melt off the loose fiber ends in said cords, and simultaneously applying radial pressure to the outer surface of said belt.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
US721169A 1958-03-13 1958-03-13 Method and apparatus for finishing belts Expired - Lifetime US2991498A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL237029D NL237029A (enrdf_load_html_response) 1958-03-13
NL123509D NL123509C (enrdf_load_html_response) 1958-03-13
US721169A US2991498A (en) 1958-03-13 1958-03-13 Method and apparatus for finishing belts
GB5961/59A GB874983A (en) 1958-03-13 1959-02-20 Method and apparatus for finishing belts
US92433A US3200662A (en) 1958-03-13 1961-02-06 Endless raw edge v-belt

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US721169A US2991498A (en) 1958-03-13 1958-03-13 Method and apparatus for finishing belts

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US2991498A true US2991498A (en) 1961-07-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5192382A (en) * 1990-03-28 1993-03-09 Mitsuboshi Belting Ltd. Method of manufacturing low-edge V-belts

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1842646A (en) * 1930-05-05 1932-01-26 Goodrich Co B F Vulcanizing apparatus
US2093922A (en) * 1935-04-01 1937-09-21 Meyer Hermann Vulcanizing apparatus
US2110076A (en) * 1936-02-19 1938-03-01 Boston Woven Hose & Rubber Co Machine for vulcanizing endless belting
US2159543A (en) * 1937-10-01 1939-05-23 Boston Woven Hose & Rubber Com Vulcanizing machine
US2451597A (en) * 1944-08-23 1948-10-19 Bakelite Corp Annealing of calendered thermoplastic material
US2551005A (en) * 1946-12-04 1951-05-01 Goodrich Co B F Surface finishing thermoplastic materials
US2551811A (en) * 1947-04-30 1951-05-08 Holeproof Hosiery Co Cutter and sealer
US2602188A (en) * 1949-03-05 1952-07-08 Raybestos Manhattan Inc Transmission belt mold
CA517655A (en) * 1955-10-18 J. Gorecki Robert Mold for transmission belts
US2770014A (en) * 1953-08-25 1956-11-13 Itt Sizing of thermoplastic cable cores

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA517655A (en) * 1955-10-18 J. Gorecki Robert Mold for transmission belts
US1842646A (en) * 1930-05-05 1932-01-26 Goodrich Co B F Vulcanizing apparatus
US2093922A (en) * 1935-04-01 1937-09-21 Meyer Hermann Vulcanizing apparatus
US2110076A (en) * 1936-02-19 1938-03-01 Boston Woven Hose & Rubber Co Machine for vulcanizing endless belting
US2159543A (en) * 1937-10-01 1939-05-23 Boston Woven Hose & Rubber Com Vulcanizing machine
US2451597A (en) * 1944-08-23 1948-10-19 Bakelite Corp Annealing of calendered thermoplastic material
US2551005A (en) * 1946-12-04 1951-05-01 Goodrich Co B F Surface finishing thermoplastic materials
US2551811A (en) * 1947-04-30 1951-05-08 Holeproof Hosiery Co Cutter and sealer
US2602188A (en) * 1949-03-05 1952-07-08 Raybestos Manhattan Inc Transmission belt mold
US2770014A (en) * 1953-08-25 1956-11-13 Itt Sizing of thermoplastic cable cores

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5192382A (en) * 1990-03-28 1993-03-09 Mitsuboshi Belting Ltd. Method of manufacturing low-edge V-belts

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