EP1023989A1 - Presse à balles en caoutchouc avec longévité prolongée - Google Patents

Presse à balles en caoutchouc avec longévité prolongée Download PDF

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Publication number
EP1023989A1
EP1023989A1 EP99101388A EP99101388A EP1023989A1 EP 1023989 A1 EP1023989 A1 EP 1023989A1 EP 99101388 A EP99101388 A EP 99101388A EP 99101388 A EP99101388 A EP 99101388A EP 1023989 A1 EP1023989 A1 EP 1023989A1
Authority
EP
European Patent Office
Prior art keywords
press
ram head
press wall
baling apparatus
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.)
Withdrawn
Application number
EP99101388A
Other languages
German (de)
English (en)
Inventor
Karl H. Fragstein
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.)
Karltex Machine Inc
Original Assignee
Karltex Machine Inc
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 Karltex Machine Inc filed Critical Karltex Machine Inc
Priority to EP99101388A priority Critical patent/EP1023989A1/fr
Publication of EP1023989A1 publication Critical patent/EP1023989A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B30B9/3032—Press boxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B30B9/3021—Press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B30B9/3014—Ejection means

Definitions

  • the present invention relates to presses and baling equipment, and more particularly to a reduced-maintenance rubber baler utilizing thermoplastic or polymer materials having low static and dynamic coefficients of friction to improve structural components such as press chamber liners and platen or ram head covers.
  • Baling machines come in many shapes and sizes, and are used to transform loose materials into solid blocks having a variety of uses.
  • typical baling machines such as the type used to bale rubber products, rubber or other compressible material is fed into a press chamber by a conveyor belt or by screw conveyor. The material is then compressed in the press chamber by a hydraulic ram having a ram head or platen until a relatively solid block is formed. The block is then ejected and the process is repeated to form additional blocks.
  • a baler press assembly includes a number of novel press chamber and ram assembly components formed of a relatively hard material, such as a thermoplastic polymer (e.g., acetal resins) or any other suitable material having low static and dynamic coefficients of friction.
  • a relatively hard material such as a thermoplastic polymer (e.g., acetal resins) or any other suitable material having low static and dynamic coefficients of friction.
  • Press chamber components according to the invention include press wall liners coupled to the press chamber walls.
  • the press wall liners are manufactured of the thermoplastic polymer or other suitable material, and are disposed between the press walls and the ram head during period of compression.
  • the low coefficients of friction of the thermoplastic polymer material allows the ram head to easily move inside of the press chamber without damage to the walls of the press chamber.
  • one embodiment of the present invention includes a ram head cover also composed of the thermoplastic polymer or other suitable material.
  • the ram head cover reduces wear damage to the press wall liners.
  • the surface area of a traditional ram head can be reduced to accept the ram head cover.
  • the interaction between the various press chamber components reduces the contamination of rubber (or any other compressible material) by preventing metal cuttings from being formed during extended use.
  • the disclosed press wall liners also feature a unique interlocking configuration that prevents rubber from migrating through the junctions of the wall liners.
  • the improved components of the present invention can be scaled for use in a baler press assembly of any size.
  • a baler press assembly incorporating these improved components has an improved service life, requiring much less maintenance than traditional baler presses.
  • FIGS. 1A and 1B show side and front views, respectively, of an exemplary upstroke baler press assembly B incorporating novel components according to the present invention.
  • the baler press assembly B is capable of producing high quality rubber bales and requires much less maintenance than prior balers. Only relevant portions of the baler press assembly B are shown; other portions are well known to those skilled in the art and are not discussed herein for sake of clarity.
  • the baler press assembly B includes press chamber B formed of reduced wear components comprised of a thermoplastic polymer or other suitable material of the type described below.
  • the baler press assembly B also includes a bale ejector assembly 11 and a ram assembly 12.
  • rubber chips or other compressible materials are supplied to the press chamber B via a conveyor belt (not shown).
  • the press chamber top liner 19 is then positioned over the press chamber B and the ram assembly 12 is activated.
  • the disclosed ram assembly 12 is comprised of a hydraulic rod 14 positioned within a rod housing and scraper 15.
  • a ram head 16 is secured to the end of the hydraulic rod 14.
  • a ram head cover 18 comprised of a thermoplastic polymer or other suitable material is secured to the ram head 16.
  • the ram head 16 and ram head cover 18 are described below in greater detail in conjunction with Figures 2 - 3 and 7 - 8.
  • the ram assembly 12 is coupled to the press walls 20 via socket cap screws 17.
  • baler press assembly B Upon activation, hydraulic power is applied to the ram assembly 12 such that the hydraulic rod 14 travels in an upward direction, forcing the ram head 16 and ram head cover 18 into the press chamber 10.
  • the baler press assembly B is powered by a hydraulic power unit (not shown). Hydraulic power from the power unit is supplied to the baler press assembly B at a number of power connection points 30.
  • the compression force applied by the ram assembly 12 is of sufficient magnitude to form a solid bale of the compressible material contained in the press chamber 10.
  • the press chamber top liner 19 is repositioned and the bale is ejected by the bale ejector assembly 11. The entire process is then repeated to form additional bales.
  • thermoplastic polymer is defined to encompass the DuPont materials Delrin® and Delrin AF® and any other materials having similar relevant properties.
  • Delrin® is an acetal resin thermoplastic polymer (or acetal homopolymer) manufactured by the polymerization of formaldehyde.
  • Delrin AF® contains high tensile strength fibers of Teflon® fluoroplastic resin.
  • Similar wear resistant materials having low static and dynamic coefficients of friction (as compared to steel) and capable of being formed into or bonded to press wall liners and ram head covers are considered to fall within the scope of the term thermoplastic polymer as used in the claimed invention.
  • press walls 20 function to provide a rigid support capable of withstanding the necessary compression forces.
  • Press wall liners 22 according to the invention are secured to the inside of the press walls 20 by means of socket cap screws 26. It is contemplated that many types of securing means could be used in place of the socket cap screws 26, and the precise manner in which the press wall liners 22 are secured to the press walls is not considered critical to the invention.
  • a prior art metal ram head 32 is shown.
  • This ram head 32 is comprised of a bottom portion 32a that connects to the hydraulic rod 14.
  • a top portion 32b communicates hydraulic pressure to the press chamber 10.
  • a ring 33 comprised of Teflon® or the like has been used to the combat this problem.
  • the ring 33 is situated in a groove along the outer circumference of top portion 32b of the ram head. The ring 33, however, may become worn to the point of causing the press to become misaligned. In turn, misalignment frequently results in scoring of the steel press chamber walls and product contamination.
  • the ram head 16 includes a bottom portion 16a that connects to the hydraulic rod 14 and a top portion 16b for receiving the ram head cover 18 ( Figures 7 and 8).
  • the top portion 16b of the ram head 16 includes a reduced section 16c on which the ram head cover 18 is secured.
  • the reduced section 16c includes a plurality of ram head bores 36 for receiving the mounting screws (not shown) used to attach the ram head cover 18.
  • no portion of the ram head 16 comes into frictional contact with the press wall liners 22 during a baling cycle.
  • FIG 4 depicts the components of the press chamber 10 in greater detail.
  • Four thermoplastic polymer press wall liners 22 interlock to form the sides of the press chamber 10.
  • the press wall liners are fixedly secured to the press walls 20 of Figure 1.
  • two press wall liners 22a are somewhat longer that the other two press wall liners 22b, such that a rectangular press chamber 10 is formed.
  • the precise shape of the press chamber 10 is not critical to the invention, however, and all four press wall liners 22 could be of equal dimensions, thereby forming a square press chamber 10.
  • the top of the press chamber 10 is formed by a press chamber top liner 19, which is also comprised of thermoplastic polymer in the preferred embodiment of the invention.
  • the bottom of the press chamber is formed by the thermoplastic polymer ram head cover 18, which is affixed to the ram head 16.
  • ram head cover 18 prevents the metal of the ram head 16 from coming into contact with the press wall liners 22.
  • the press wall liners 22 by themselves provide improved performance over the prior art by preventing scoring of the press walls 20, the inclusion of the ram head cover 18 further extends the service life of the baler press assembly B by reducing wear on the press wall liners 22.
  • the low static and dynamic coefficients of friction of the thermoplastic polymer material also reduce the hydraulic pressure necessary for the baling process.
  • a baler press assembly B according to the present invention has a very long service life as compared to prior baler press assemblies.
  • reduced-friction interaction between the various press chamber 10 components ameliorates contamination of the rubber (or any other compressible material) by preventing the introduction of metal cuttings due to wear.
  • FIG. 5A - 5D isometric views of the press wall liners 22a and 22b are shown.
  • Each of the press wall liners 22a and 22b include a plurality of liner bores 28 for receiving socket cap screws (not shown).
  • the socket cap screws function to secure the press wall liners 22a and 22b to the press walls 20.
  • Many other types of securing means, such as rivets, could be used to secure the press wall liners 22a and 22b to the press walls 20.
  • each of the press wall liners 22a and 22b of the disclosed embodiment also include extruded portions 23 for forming an interlocking junction between the press wall liners 22.
  • Figure 6 a top view of an interlocking press wall liner 22 junction is shown.
  • the extruded portions 23 of a press wall liner 22 are essentially lips formed by chamfering each end of the press wall liner 22.
  • the extruded portions 23 are configured to interlock in a substantially congruent manner, such that migration of the compressible material between the press walls liners 22 is retarded. This feature of the invention further improves the service life of the baler press assembly B.
  • the disclosed ram head cover 18 includes a recessed portion 18a that is configured to receive the reduced section 16c of the ram head 16.
  • the ram head cover 18 includes a plurality of countersunk bores 34 corresponding to the bores of the reduced section of the ram head 16.
  • the precise manner in which the ram head cover 18 is affixed to the ram head 16 is not considered critical to the invention.
  • all frictional contact between the ram assembly 12 and the press chamber 10 preferably occurs between the press wall liners 22 and the ram head cover 18.
  • baler press assembly 10 could be used in any type of press assembly having a press chamber. Further, the scope of the invention is not considered limited to rubber balers, but instead could be used in the compression of a wide variety of materials.
  • the press chamber and ram assembly components are formed of a material having a low coefficients of friction.
  • the reduction in frictional wear interaction between the various components reduces product contamination due to metal cuttings.
  • An embodiment of the present invention can provide a bailing apparatus for compressing a compressible material, the baling apparatus comprising:
  • An embodiment of the present invention can provide a baling apparatus as set out in the foregoing paragraph wherein each of the plurality of press wall liners is integral with one of the plurality of press walls.
  • An embodiment of the present invention can provide a baling apparatus as set out in either of the foregoing two paragraphs wherein the first and second extruding portions are lips formed by chamfering an end of the first and second press wall liners, the lips being capable of interlocking in a substantially congruent manner.
  • material forming wear strips and having low static and dynamic coefficients of friction may be a thermoplastic polymer material.
  • the compressible material may be a rubber bale.
  • An embodiment of the present invention can provide a baling apparatus for compressing a compressible material, the baling apparatus comprising:
  • An embodiment of the present invention can provide a baling apparatus as set out in the foregoing paragraph wherein the ram head has a reduced surface area for receiving the ram head cover, and wherein the ram head cover prevents metal portions of the ram head from contacting the plurality of press wall liners.
  • An embodiment of the present invention can provide a baling apparatus as set out in either of the foregoing two paragraphs wherein each of the plurality of press wall liners is integral with one of the plurality of press walls.
  • An embodiment of the present invention can provide a baling apparatus as set out in any of the foregoing three paragraphs wherein the first and second extruding portions are lips formed by chamfering an end of the first and second press wall liners, the lips being capable of interlocking in a substantially congruent manner.
  • An embodiment of the present invention can provide a baling apparatus for compressing a compressible material, comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP99101388A 1999-01-26 1999-01-26 Presse à balles en caoutchouc avec longévité prolongée Withdrawn EP1023989A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99101388A EP1023989A1 (fr) 1999-01-26 1999-01-26 Presse à balles en caoutchouc avec longévité prolongée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99101388A EP1023989A1 (fr) 1999-01-26 1999-01-26 Presse à balles en caoutchouc avec longévité prolongée

Publications (1)

Publication Number Publication Date
EP1023989A1 true EP1023989A1 (fr) 2000-08-02

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EP99101388A Withdrawn EP1023989A1 (fr) 1999-01-26 1999-01-26 Presse à balles en caoutchouc avec longévité prolongée

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613568A (en) * 1969-11-13 1971-10-19 Whirlpool Co Refuse compactor ram cover
US3937355A (en) * 1971-09-27 1976-02-10 Hobart Corporation Removable liner for trash compactors
DE2939205A1 (de) * 1979-09-27 1981-04-16 Augsburger Textilmaschinenfabrik Gmbh, 8904 Friedberg Ballenpresse, insbesondere fuer langfaseriges gut
DE2949712A1 (de) * 1979-12-11 1981-06-19 Norbert 7940 Riedlingen Seidner Ballenpresse
GB2169846A (en) * 1984-11-21 1986-07-23 Kumpulan Guthrie Sdn Bhd Twin chamber press
US4936206A (en) * 1988-12-30 1990-06-26 Thomas R. Miles High-density compactor for fibrous material
US5461975A (en) * 1994-06-16 1995-10-31 Driggs; Leland W. Low friction baler liner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613568A (en) * 1969-11-13 1971-10-19 Whirlpool Co Refuse compactor ram cover
US3937355A (en) * 1971-09-27 1976-02-10 Hobart Corporation Removable liner for trash compactors
DE2939205A1 (de) * 1979-09-27 1981-04-16 Augsburger Textilmaschinenfabrik Gmbh, 8904 Friedberg Ballenpresse, insbesondere fuer langfaseriges gut
DE2949712A1 (de) * 1979-12-11 1981-06-19 Norbert 7940 Riedlingen Seidner Ballenpresse
GB2169846A (en) * 1984-11-21 1986-07-23 Kumpulan Guthrie Sdn Bhd Twin chamber press
US4936206A (en) * 1988-12-30 1990-06-26 Thomas R. Miles High-density compactor for fibrous material
US5461975A (en) * 1994-06-16 1995-10-31 Driggs; Leland W. Low friction baler liner

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