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EP1066132B1 - Ein verfahren und eine vorrichtung zum polieren von teilen - Google Patents

Ein verfahren und eine vorrichtung zum polieren von teilen Download PDF

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Publication number
EP1066132B1
EP1066132B1 EP99972959A EP99972959A EP1066132B1 EP 1066132 B1 EP1066132 B1 EP 1066132B1 EP 99972959 A EP99972959 A EP 99972959A EP 99972959 A EP99972959 A EP 99972959A EP 1066132 B1 EP1066132 B1 EP 1066132B1
Authority
EP
European Patent Office
Prior art keywords
cavity
polishing
polished
foregoing
abrasive
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
EP99972959A
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English (en)
French (fr)
Other versions
EP1066132A2 (de
Inventor
Claudio Mingot
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.)
Mingot Roberto
Original Assignee
Mingot Roberto
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
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Application filed by Mingot Roberto filed Critical Mingot Roberto
Publication of EP1066132A2 publication Critical patent/EP1066132A2/de
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Publication of EP1066132B1 publication Critical patent/EP1066132B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
    • B24B31/14—Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/006—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor for grinding the interior surfaces of hollow workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers

Definitions

  • the present invention relates to a method and an apparatus for polishing parts which have at least one cavity to be polished.
  • the present invention is preferably applied to parts in the form of moulds or portions of moulds for the production of plastic items, where the cavity to be polished is the shaped mould for the item.
  • Metal parts are currently polished by barrel cleaning.
  • a tumbling barrel or container is filled with disassembled parts and a cleaning mixture or material designed to abrade the surface of the corresponding wall of the parts, polishing its surface.
  • the relative movement of the surfaces to be polished and the cleaning mixture is obtained by causing the hermetically sealed container to keep rotating for a given time.
  • Barrel cleaning carried out in accordance with the prior art is not only expensive due to the fact that it requires the use of a special machine with a large container for the parts and the use of a large amount of polishing material, but in addition does not allow selective polishing of the various areas of the part.
  • This is a problem, for example, for portions of moulds in which there are reference surfaces which guide the various mould parts and hold them in their reciprocal positions, and whose abrasion following repeated barrel cleaning operations leads to the production of defective plastic items.
  • Such types of moulds are used, for example, for the production of PET bottles.
  • WO 90 05044 discloses a method and apparatus for polishing parts which have a cavity to be polished, in which the cavity is filled with a abrasive medium which is put in movement with respect to the cavity by a displacer member inserted into the cavity.
  • the aim of the present invention is, therefore, to overcome the above-mentioned disadvantages individually or as a whole.
  • the method envisages the preparation of a polishing mixture, which is then brought into contact with the surface of the cavity to be polished and the movement of the polishing mixture relative to the surface to be polished for a preset time.
  • the method advantageously envisages the insertion of the polishing mixture in the cavity in the part, which is specially designed to define an element for containing the polishing mixture.
  • the quantity which can be inserted in the cavity whose surfaces are to be polished is sufficient.
  • the cavity has an upper lip.
  • the polishing mixture is inserted up to a level which is above that of the inferior level (22a) of the ring shaped portion (18') of the upper lip of the cavity.
  • the part when the polishing mixture has been inserted in the cavity, the part is subjected to vibration.
  • an advantageous polishing result is obtained by using a dry polishing mixture consisting of a percentage weight varying between 50 and 80% of metal pellets, or abrasive ceramic elements, or abrasive plastic elements, and a percentage weight of from 20 to 50 of an abrasive which is normally in powder form.
  • the wet polishing mixture preferably consists of a 70 to 90% percentage weight of metal pellets, or abrasive ceramic elements, or abrasive plastic elements, between 5 and 20% abrasive and from 3 to 10% water.
  • polish between 3 and 10% of polish is also possible.
  • a liquid detergent which increases material detachment and gives the cavity a more glossy finish after polishing.
  • an optimum composition of the polishing mixture which allows the most remarkable polishing result to be obtained consists of an 80% percentage weight of metal pellets, 10% abrasive, 5% polish and 5% water.
  • the metal pellets advantageously consist of copper pellets with various shapes, for example, rhomboid, triangular and cylindrical, with a larger dimension of between 3 and 6 mm.
  • the abrasive ceramic elements or bodies, or the abrasive plastic elements or bodies may have similar or greater dimensions.
  • the length of the polishing treatment is preferably between 6 and 20 hours.
  • a preferred embodiment 10 of an apparatus made according to the present invention comprises a base or support table 16 for a plurality of parts to be polished 12. As illustrated, the table is mounted on springs 17 on a fixed base 15.
  • use of the present apparatus envisages the insertion of the polishing mixture in the cavity 14 of the parts 12 in such a way that the latter define container elements for the polishing mixture 13.
  • the vibrating means consist of a vibrator 22, applied to the table 16, which is switched on in order to make the table 16 vibrate.
  • a vibration is transmitted to the part, causing the polishing material to rotate in a direction of circulation which results in direct contact between the effective side of the abrasive current and a first face of the cavity in the part (indicated by the arrows in the illustration). This is due to the fact that the vibration on the table has a horizontal vibration parallel with the table and a jerking vibration perpendicular to the table.
  • the table vibration is interrupted, at preset intervals, and the part turns through a preset angle until the surface is completely polished.
  • the polarity of rotation of the vibration motor may be inverted, in order to invert the direction of rotation of the polishing material circulating in the cavity. This allows polishing of all circumferential walls, particularly those of small parts.
  • the device which imparts the vibration to the table comprises a rotary vibrating shaft, with weights which are offset relative to the axis of the shaft, positioned so that the axis is parallel with the table.
  • the present apparatus avoids the use of the expensive and bulky tumbling barrels referred to in the prior art.
  • each part 12 there are special means for hermetically sealing the cavity 14, consisting of an upper lid 18 (18', 18") shaped in such a way that it extends upwards, defining an upper expansion chamber 20 for the polishing mixture 13 inserted in the cavity 14.
  • This shape advantageously allows the insertion of the polishing mixture up to a level which is above the upper lip of the cavity 14, allowing complete polishing of all surfaces of the cavity 14 to be polished.
  • the upper lid comprises a first ring-shaped element 18' and an upper disc-shaped sealing element 18''.
  • the polishing material 13 is inserted in the part before the upper disc-shaped element 18'' is put in place.
  • the sealing means are hermetically sealed and the part is fixed to the table using a single plate 21 for each part, positioned above the part and lid, and held on the table 16 by extended legs 23, threaded at the ends on which locknuts 25 are screwed.
  • the ring-shaped portion 18' of the means 18 for sealing the cavity 14 forms means or portions 22a which extend to cover and protect those areas of the part 12 located in the cavity 14 which must not be polished.
  • a wet polishing mixture consisting of a percentage weight of 80% copper pellets with a length of 4 mm, 10% powder abrasive, such as Rollwash Dialbril (brand name), 5% liquid polish, such as Rosler CL30 (brand name) and 5% water.
  • the part is subjected to vibration.
  • the treatment time is 12 hours.
  • a dry polishing mixture consisting of a percentage weight of 50% copper pellets with a length of 6 mm and 50% powder abrasive, such as Rollwash Dialbril (brand name).
  • the part is subjected to vibration.
  • the treatment time is 6 hours.
  • a wet polishing mixture consisting of a percentage weight of 90% copper pellets with a length of 3 mm, 5% powder abrasive, such as Rollwash Dialbril (brand name), 3% water, 2% polish, such as the detergent Rosler CL30 (brand name).
  • the part is subjected to vibration.
  • the treatment time is 20 hours.
  • a second polishing mixture is used for the latter, consisting of a percentage weight of from 70 to 95% metal pellets, or abrasive ceramic elements, or abrasive plastic elements, preferably 90%, from 3 to 20% water, preferably 5%, and from 3 to 20% polish, preferably 5%.
  • the length of the second polishing stage is between 2 and 3 hours.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (20)

  1. Verfahren zum Polieren von Teilen, welche wenigstens einen zu polierenden Hohlraum (14) haben, insbesondere Teile (12) in der Art von Formen oder Abschnitten von Formen zur Herstellung von Kunststoffartikeln, bei welchen der zu polierende Hohlraum die Profilform für den Artikel ist, wobei das Verfahren die Zubereitung einer Poliermischung (13) vorsieht, wobei letztere mit der Oberfläche des zu polierenden Hohlraumes in Kontakt gebracht und die Poliermischung im Verhältnis zu der zu polierenden Oberfläche für eine bestimmte Dauer bewegt wird, wobei die Poliermischung direkt in den Hohlraum des Teiles eingegeben wird und das Teil daher ein Aufnahmeelement für die Poliermischung beschreibt, bei welchem der Hohlraum durch einen Deckel (18) verschlossen ist, dadurch gekennzeichnet, dass, wenn die Poliermischung in den Hohlraum eingegeben ist, das Teil einer Vibration unterzogen wird.
  2. Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, dass der Rand einen ringförmigen Abschnitt (18') hat, und dadurch, dass die Poliermischung bis zu einem Füllstand eingegeben wird, welcher oberhalb der unteren Ebene (22a) des ringförmigen Abschnittes (18') des oberen Randes des Hohlraums liegt.
  3. Verfahren nach einem beliebigen der vorstehenden Patentansprüche, dadurch gekennzeichnet, dass die Poliermischung aus einem Gewichtsanteil von 50 bis 80% Metallteilchen oder Keramik-Schleifelementen oder Kunststoff-Schleifelementen und aus 20 bis 50% Schleifmittel besteht.
  4. Verfahren nach einem beliebigen der vorstehenden Patentansprüche von 1 bis 2, dadurch gekennzeichnet, dass die Poliermischung aus einem Gewichtsanteil von 70 bis 90% Metallteilchen oder Keramik-Schleifelementen oder Kunststoff-Schleifelementen, von 5 bis 20% Schleifmittel und von 3 bis 10% Wasser besteht.
  5. Verfahren nach Patentanspruch 4, dadurch gekennzeichnet, dass die Poliermischung einen Gewichtsanteil von 3 bis 10% Poliermittel enthält.
  6. Verfahren nach einem beliebigen der vorstehenden Patentansprüche von 1 bis 5, dadurch gekennzeichnet, dass die optimale Poliermischung aus einem Gewichtsanteil von 80% Metallteilchen, 10% Schleifmittel, 5% Poliermittel und 5% Wasser besteht.
  7. Verfahren nach einem beliebigen der vorstehenden Patentansprüche von 3 bis 6, dadurch gekennzeichnet, dass die Metallteilchen aus Kupfer sind.
  8. Verfahren nach einem beliebigen der vorstehenden Patentansprüche von 3 bis 7, dadurch gekennzeichnet, dass die grössere Abmessung der Metallteilchen zwischen 3 und 6 mm beträgt.
  9. Verfahren nach einem beliebigen der vorstehenden Patentansprüche von 1 bis 8, dadurch gekennzeichnet, dass die Dauer der Polierbehandlung zwischen 6 und 20 Stunden beträgt.
  10. Verfahren nach einem beliebigen der vorstehenden Patentansprüche von 1 bis 9, dadurch gekennzeichnet, dass, um die gesamte umlaufende Fläche des Hohlraumes gleichmässig zu polieren, die Vibration unterbrochen und das Teil um einen bestimmten Winkel gedreht wird, ein oder mehrere Male, bis die Oberfläche vollständig poliert ist.
  11. Verfahren nach einem beliebigen der vorstehenden Patentansprüche von 1 bis 10, dadurch gekennzeichnet, dass die dem Teil verliehene Vibration eine Komponente parallel zu dem Tisch und eine stossartige Komponente lotrecht zu dem Tisch hat.
  12. Verfahren nach einem beliebigen der vorstehenden Patentansprüche von 1 bis 11, dadurch gekennzeichnet, dass im Anschluss an die erste Polierphase der Hohlraum einer zweiten, endgültigen Polierphase unterzogen wird, wobei eine zweite Poliermischung zur Anwendung kommt, bestehend aus einem Gewichtsanteil von 70 bis 95% Metallteilchen oder Keramik-Schleifelementen oder Kunststoff-Schleifelementen, vorzugsweise 90%, von 3 bis 20% Wasser, vorzugsweise 5%, und von 3 bis 20% Poliermittel, vorzugsweise 5%, wobei die Dauer der zweiten Polierphase zwischen 2 und 3 Stunden beträgt.
  13. Vorrichtung (10) zum Polieren von Teilen (12), welche wenigstens einen zu polierenden Hohlraum (14) haben, insbesondere Teile (12) in der Art von Formen oder Abschnitten von Formen für die Herstellung von Kunststoffartikeln, bei welchen der zu polierende Hohlraum (14) die Profilform für den Artikel ist, wobei die Vorrichtung dadurch gekennzeichnet ist, dass sie einen Trägertisch (16) für wenigstens ein zu polierendes Teil (12) enthält, sowie Mittel zum Bewegen einer Poliermischung (13), die für den Betrieb in den Hohlraum des Teiles (12) eingegeben wird, im Verhältnis zu der zu polierenden Oberfläche für eine bestimmte Dauer, wobei die Mittel zum Bewegen der Poliermischung (13) im Verhältnis zu der zu polierenden Oberfläche in dem Hohlraum (14) Mittel (22) enthalten, welche die Vibration des Teiles (12) bewirken.
  14. Vorrichtung nach Patentanspruch 13, dadurch gekennzeichnet, dass die Mittel, welche die Vibration des Teiles (12) bewirken, Mittel enthalten, welche den beweglichen Trägertisch (16) für das zu polierende Teile (12) zum Vibrieren bringen.
  15. Vorrichtung nach einem jeden der vorgenannten Patentansprüche 13 oder 14, dadurch gekennzeichnet, dass sie Mittel zum Verschliessen des Hohlraumes (14) in dem Teil (12) enthält.
  16. Vorrichtung nach Patentanspruch 15, dadurch gekennzeichnet, dass die Mittel zum Verschliessen des Hohlraums (14) in dem Teil (12) eine obere Expansionskammer (20) für die in den Hohlraum (14) eingegebene Poliermischung (13) beschreiben.
  17. Vorrichtung nach Patentanspruch 16, dadurch gekennzeichnet, dass die Mittel zum Verschliessen des Hohlraums (14) in dem Teil (12) Mittel oder Abschnitte (22a) beschreiben, um jene sich in dem Hohlraum (14) befindlichen Bereiche des Teiles (12) abzudecken und zu schützen, die nicht poliert werden sollen.
  18. Vorrichtung nach Patentanspruch 16 oder 17, dadurch gekennzeichnet, dass zum hermetischen Abdichten der Verschlussmittel und zum Befestigen des Teiles an dem Tisch auf solche Weise, dass dieses anschliessend abgenommen werden kann, eine Platte (21) verwendet wird, die oberhalb des Teiles und der Verschlussmittel positioniert und an dem Tisch (16) durch verlängerte Stützbeine (23) gehalten wird, letztere an ihren Enden mit Gewinden versehen, auf welche Blockiermuttern (25) geschraubt werden.
  19. Vorrichtung nach einem beliebigen der vorstehenden Patentansprüche von 13 bis 18, dadurch gekennzeichnet, dass die Vibrationsmittel (22) dem Teil eine Vibration verleihen, welche eine Komponente parallel zu dem Tisch (16) und eine stossartige Komponente hat, welche lotrecht zu dem Tisch verläuft.
  20. Vorrichtung nach Patentanspruch 19, dadurch gekennzeichnet, dass die Vibrationsmittel (22) eine rotierende Welle enthalten, versehen mit versetzten Vibrationsgewichten (22'), wobei die Welle parallel zu dem das Teil (12) tragenden Tisch (16) angeordnet ist.
EP99972959A 1998-11-27 1999-11-25 Ein verfahren und eine vorrichtung zum polieren von teilen Expired - Lifetime EP1066132B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT1998BO000665A IT1304137B1 (it) 1998-11-27 1998-11-27 Materiale, procedimento e apparecchiatura per la lucidatura di pezzi.
ITBO980665 1998-11-27
PCT/IB1999/001888 WO2000032354A2 (en) 1998-11-27 1999-11-25 A material, method and apparatus for polishing parts

Publications (2)

Publication Number Publication Date
EP1066132A2 EP1066132A2 (de) 2001-01-10
EP1066132B1 true EP1066132B1 (de) 2003-02-12

Family

ID=11343534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99972959A Expired - Lifetime EP1066132B1 (de) 1998-11-27 1999-11-25 Ein verfahren und eine vorrichtung zum polieren von teilen

Country Status (8)

Country Link
EP (1) EP1066132B1 (de)
AT (1) ATE232434T1 (de)
AU (1) AU1173000A (de)
DE (1) DE69905347T2 (de)
ES (1) ES2192890T3 (de)
IT (1) IT1304137B1 (de)
TW (1) TW421616B (de)
WO (1) WO2000032354A2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109807698A (zh) * 2018-11-22 2019-05-28 华侨大学 一种印章石的振磨抛光方法
IT202200023910A1 (it) * 2022-11-21 2024-05-21 Arnmec Srl Apparecchiatura di tipo migliorato per la lucidatura e la pulitura delle superfici interne di corpi cavi

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1395917B1 (it) * 2009-06-19 2012-11-02 A A M Di Arnello Andrea Off Apparecchiatura e metodo per la lucidatura delle cavita' di componenti meccanici.
CN103624956B (zh) * 2013-10-16 2016-11-16 淮海工学院 异型材定型模具挤压珩磨装置
ITFI20130248A1 (it) 2013-10-17 2015-04-18 Nuovo Pignone Srl "airfoil machine components polishing method"
US11633824B2 (en) * 2019-12-18 2023-04-25 National Chung-Shan Institute Of Science And Technology Grinding cavity body of multiple vibration sources
US11628539B2 (en) * 2019-12-18 2023-04-18 National Chung-Shan Institute Of Science And Technology Multi-dimensional vibration grinding cavity body
CN113021084A (zh) * 2021-03-17 2021-06-25 惠州标点扣具科技有限公司 一种塑料扣具生产用成型模具加工方法
CN116100455B (zh) * 2023-03-20 2023-07-14 西安航天动力研究所 一种疲劳试样的纵向抛光装置及纵向抛光方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460657A (en) * 1944-12-22 1949-02-01 Lancaster Processes Inc Method and apparatus for peening the inside of tubes and other hollow bodies
US4829714A (en) * 1986-07-22 1989-05-16 Iowa Engineered Processes, Corp. Devurring and cleaning machine and process
AU4528889A (en) * 1988-11-02 1990-05-28 Extrude Hone Corporation Orbital and/or reciprocal machining with a viscous plastic medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109807698A (zh) * 2018-11-22 2019-05-28 华侨大学 一种印章石的振磨抛光方法
IT202200023910A1 (it) * 2022-11-21 2024-05-21 Arnmec Srl Apparecchiatura di tipo migliorato per la lucidatura e la pulitura delle superfici interne di corpi cavi
WO2024110831A1 (en) * 2022-11-21 2024-05-30 Arnmec S.r.l. Improved apparatus for polishing and cleaning inner surfaces of hollow bodies

Also Published As

Publication number Publication date
WO2000032354A2 (en) 2000-06-08
DE69905347T2 (de) 2003-12-04
DE69905347D1 (de) 2003-03-20
ITBO980665A0 (it) 1998-11-27
ATE232434T1 (de) 2003-02-15
EP1066132A2 (de) 2001-01-10
ES2192890T3 (es) 2003-10-16
AU1173000A (en) 2000-06-19
IT1304137B1 (it) 2001-03-07
TW421616B (en) 2001-02-11
WO2000032354A3 (en) 2000-11-09
ITBO980665A1 (it) 2000-05-27

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