WO2005080061A1 - タイヤ加硫成形用金型及びその製造方法 - Google Patents
タイヤ加硫成形用金型及びその製造方法 Download PDFInfo
- Publication number
- WO2005080061A1 WO2005080061A1 PCT/JP2005/002239 JP2005002239W WO2005080061A1 WO 2005080061 A1 WO2005080061 A1 WO 2005080061A1 JP 2005002239 W JP2005002239 W JP 2005002239W WO 2005080061 A1 WO2005080061 A1 WO 2005080061A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- divided
- tire
- pieces
- divided pieces
- mold
- Prior art date
Links
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/301—Modular mould systems [MMS], i.e. moulds built up by stacking mould elements, e.g. plates, blocks, rods
- B29C33/302—Assembling a large number of mould elements to constitute one cavity
-
- 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
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
Definitions
- the present invention relates to a tire vulcanization mold for forming a pattern of a tread portion of a tire, and a method for producing the same.
- a substantially cylindrical member (ring-shaped workpiece) having an inner peripheral surface shape corresponding to the surface of the tread portion of the tire is formed, and then a plurality of circumferentially located portions of the substantially cylindrical member are formed. It is cut by electric discharge machining of the wire electrode force (or mechanical cutting by a wire cutting tool) and divided into a plurality of divided pieces.
- Patent Document 1 Japanese Patent Publication No. 1 29686 (Figs. 1 to 3)
- the cut surface of the cut portion is extremely rough as it is.
- the “divided surface” must be finished with high dimensional accuracy (hereinafter “divided accuracy” as appropriate). For this reason, after the above-mentioned cutting, a large number of man-hours are required for precise finishing of the divided surface, which has led to an increase in manufacturing cost.
- each divided piece is slightly smaller than the size at the time of cutting because of the cutting allowance at the time of cutting and the finishing allowance at the time of the above finishing work.
- two identical cylindrical members are required, which also increases the manufacturing cost.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a vulcanization molding metal which can ensure high division accuracy at low manufacturing cost and can easily control a gap size between divided pieces.
- An object of the present invention is to provide a mold and a manufacturing method thereof.
- a first aspect of the present invention provides a tire processing device having an inner peripheral surface shape corresponding to a surface of a tread portion of a tire and configured by combining a plurality of divided pieces divided in a tire circumferential direction.
- at least one of the plurality of divided pieces includes a pin protector having a substantially round bar shape provided so as to protrude from a combination surface with an adjacent divided piece.
- the divided piece is provided with a first concave groove having a substantially arc-shaped cross section to be fitted to the pin protector on a surface combined with the divided piece to be combined.
- a pin protector having a substantially round bar shape is provided so as to protrude on one side of the divided pieces to be combined, and a corresponding first concave groove is provided on the other side, and these are fitted.
- Combine By adopting a structure in which a concave groove is fitted on the outer peripheral side of such a round bar, if only the pin protector and the first concave groove are precisely adjusted, the divided pieces can be assembled in the circumferential direction. High-precision positioning can be performed in the radial direction, and other divided surfaces do not require high-precision processing, and for example, may be left in a cut state.
- the area requiring high-precision processing can be extremely reduced as compared with the conventional structure that required high-precision finishing on the entire divided surface, and the manufacturing cost can be reduced. Also, fitting and combining such small high-precision finishing areas, By adopting a structure for positioning, there is no problem even when the cut surfaces of both divided pieces are opposed to each other with a gap therebetween during assembly. As a result, it is not necessary to prepare the same two cylindrical members (before division) for one mold, which can also reduce the manufacturing cost.
- the diameter of the pin protector and the The size of the gap between the divided pieces can be determined by the relationship between the size of the groove and the diameter of the concave groove in (1). It is possible to easily control.
- a second invention is characterized in that, in the first invention, the at least one divided piece includes a second concave groove having a substantially circular arc cross section for fixing the pin protector.
- the second concave groove provided in the at least one divided piece and the first concave groove provided in the adjacent divided piece have substantially the same diameter. It is characterized by being.
- a fourth invention is characterized in that, in any one of the first to third inventions, the at least one split piece detachably attaches the pin protector to the combination surface.
- a fifth invention is to form a substantially cylindrical member having an inner peripheral surface shape corresponding to the surface of a tread portion of a tire, and to divide the plurality of substantially cylindrical members in a circumferential direction.
- a substantially circular hole penetrating in the radial direction is drilled so as to straddle at least one of the surfaces to be divided, and the substantially cylindrical member is formed at the plurality of positions including the positions of the substantially circular holes.
- And cut into a plurality of divided pieces, and the above-described cutting divides the substantially circular hole into two corresponding divided pieces.
- a substantially round bar-shaped pin protector is fitted and fixed in the concave groove of one of the divided pieces. Into the groove of the divided piece Each is characterized by combining the two divided pieces.
- the combination in the combination of the two divided pieces is adjusted by adjusting a magnitude relationship of the diameter of the pin protector with respect to the diameter of the concave groove of the one divided piece. It is characterized in that the gap size of the surface is adjusted.
- FIG. 1 is a perspective view showing the entire structure of a tire vulcanization mold according to one embodiment of the present invention.
- FIG. 2 is a top view showing the overall structure of the tire vulcanization mold shown in FIG. 1.
- FIG. 3 is a transverse sectional view taken along the IIHII section in FIG. 2.
- FIG. 4 is an enlarged view of a main part of FIG. 3.
- FIG. 5 is an exploded side view showing part A in FIG. 1 in an enlarged manner.
- FIG. 6 is a view illustrating a manufacturing procedure (step) of the tire vulcanization mold illustrated in FIG. 1.
- FIG. 7 is a diagram showing a behavior in positioning.
- FIG. 1 is a perspective view showing the entire structure of a tire vulcanization molding die of the present embodiment
- FIG. 2 is a top view thereof (however, a shoulder portion 3 described later is omitted for clarity of the structure). Is).
- the tire vulcanizing mold 1 is divided into a plurality (9 in this example) divided by a plurality of divided surfaces (curved surfaces) D in the tire circumferential direction.
- the split piece (sector one mold) 1A is composed of a substantially annular combination.
- FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, and FIG. 4 is an enlarged view of a main part thereof.
- the mold 1 (in other words, each divided piece 1A) includes a tread portion 2 having an inner peripheral tread surface 2A corresponding to the surface of the tread portion of the tire, and a It has a shoulder portion 3 which is brought into contact with the tread portion 2 via a contact surface 2B.
- the tread surface 2A includes a contour surface 2Aa corresponding to the ground contact surface of the tire and a plurality of protrusions 2Ab corresponding to the groove of the tire.
- the most significant feature of the present embodiment lies in the combination structure of each divided piece 1A with an adjacent divided piece 1A.
- FIG. 5 is an exploded side view showing part A in FIG. 1 in an enlarged manner.
- each of the divided pieces 1A is formed on one of the divided surfaces D (clockwise in FIGS. 1 and 2) (in other words, the combined surface) D of the divided surfaces D on both sides in the circumferential direction.
- a concave groove 101 (second concave groove) having a substantially circular arc cross section is provided.
- the concave groove 101 is provided at each of a plurality of locations (two locations in this example) in each of the divided planes D, for example, in the axial direction (perpendicular to the paper surface in FIG. 2).
- Each groove 101 is detachably fixed by a pin protector 100 having a substantially round bar shape so as to protrude from the division surface D by a mounting bolt 103 penetrating in the circumferential direction (see FIG. 5). .
- each divided piece 1A has a divided surface (combined surface) on the other side (counterclockwise in FIGS. 1 and 2) of the divided surfaces D on both sides in the circumferential direction.
- D is provided with a concave groove 102 (first concave groove) having a substantially arc-shaped cross section having substantially the same diameter as the above-mentioned concave groove 101, and the divided pieces 1 to be combined (adjacent) circumferentially opposed to each other.
- the pin protector 100 provided in A is fitted with the pin protector.
- FIGS. 6A to 6D are diagrams showing this manufacturing procedure (process).
- a substantially cylindrical member 1M having an inner peripheral surface shape corresponding to the surface of the tread portion of the tire is formed by a known method (turning or the like).
- a plurality of locations in this example, 9
- a substantially circular hole T penetrating in the radial direction is drilled so as to straddle the planned dividing plane (planned line) Do corresponding to the aforementioned dividing plane D at the point (1).
- the holes T are formed with relatively high precision so as to satisfy a predetermined dimensional accuracy as described later.
- the substantially cylindrical member 1M is cut (divided) by the nine divided surfaces including the positions of the substantially circular holes T to be pierced. Divide into 1A divided pieces. Note that the cutting at this time does not require a particularly high precision as described later, and therefore, normal cutting, wire cutting, fine drilling, fine sawing or the like is sufficient.
- the above-mentioned substantially circular hole T is divided by this cutting, and the concave grooves 101, 102 each having a substantially circular cross section are formed in the corresponding two divided pieces 1A, 1A, respectively.
- the pin protector 100 attached to the groove 101 side of each divided piece 1A is attached to the groove 102 of the adjacent divided piece 1A to be assembled.
- the two divided pieces 1A, 1A are combined while being fitted to the joints, and this is performed for all the joints, and all the pieces 1A are connected to complete the tire vulcanization mold 1.
- the substantially round bar-shaped pin protector 100 protrudes from the division surface D of the divisional piece 1A on one side to be combined. Then, a corresponding concave groove 102 is provided in the other divided piece 1A, and these are fitted together.
- FIG. Assemble the divided pieces 1A as shown in the figure with high precision in the circumferential and radial directions. The positioning can be performed, and the displacement of the divided pieces, such as the so-called flat plate protector currently proposed, and the displacement of the above-mentioned protrusion (pattern) 2Ab due to this can be prevented.
- the pin protector 100 (including the concave groove 101 to which the pin protector 100 is attached) and the divided surface other than the concave groove 102 do not require high-precision processing.
- the cut state it is sufficient to keep the cut state.
- the durability of the divided piece 1A for example, a portion formed of aluminum or the like
- the portion can be prevented from being damaged when combined.
- the area requiring high-precision machining can be extremely reduced as compared with the conventional structure that requires high-precision finishing for the entire division surface D, and the manufacturing cost can be reduced.
- the cut surfaces of the two divided pieces 1A, 1A face each other with a gap between them during assembly. There is no problem in doing so. As a result, it is not necessary to prepare the same two cylindrical members 1M in order to manufacture one mold 1, so that the manufacturing cost can be reduced.
- the size of the gap between the diameter of the pin protector 100 and the diameter of the concave groove 102) can determine the gap dimension of the combined surface of the divided pieces 1A and 1A. For example, if the diameter of the pin protector 100 is increased with respect to the diameter of the groove 101 or the groove 102 (the protector 100 may be replaced or the groove 102 may be modified), the direction in which the gap is widened In other words, the control is performed in the direction of decreasing the gap.
- the gap dimension between the divided pieces 1A, 1A can be easily controlled.
- various pin protectors 100 having slightly different diameters can be prepared and exchanged.Furthermore, the clearance dimension can be easily adjusted. Maintenance such as replacement when the protector 100 is worn is easy.
- the coupling by the concave grooves 101 and 102 and the pin protector 100 is performed at two locations in the axial direction on each of the divided surfaces D between the divided pieces 1A and 1A.
- the present invention is not limited to this, and only one location in the axial direction may be used.
- the connection (and gap management) between the adjacent divided pieces 1A via the pin protector 100 has been described.
- the present invention is not limited to this.
- the force described by taking the case where the present invention is applied to a tire vulcanization mold as an example is not limited to this.
- the present invention is applicable to all split molds that require a function as a protector or a knock pin. Applicable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602005013919T DE602005013919D1 (de) | 2004-02-20 | 2005-02-15 | Formwerkzeug zum vulkanisieren/formen von reifen und herstellungsverfahren dafür |
EP05719141A EP1717003B1 (en) | 2004-02-20 | 2005-02-15 | Mold for vulcanizing/forming tire and method of manufacturing the same |
US10/589,821 US7377761B2 (en) | 2004-02-20 | 2005-02-15 | Tire vulcanizing mold |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-045293 | 2004-02-20 | ||
JP2004045293A JP4329931B2 (ja) | 2004-02-20 | 2004-02-20 | タイヤ加硫成型用金型及びその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005080061A1 true WO2005080061A1 (ja) | 2005-09-01 |
Family
ID=34879383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/002239 WO2005080061A1 (ja) | 2004-02-20 | 2005-02-15 | タイヤ加硫成形用金型及びその製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7377761B2 (ja) |
EP (1) | EP1717003B1 (ja) |
JP (1) | JP4329931B2 (ja) |
CN (1) | CN100464962C (ja) |
DE (1) | DE602005013919D1 (ja) |
WO (1) | WO2005080061A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009096052A (ja) * | 2007-10-16 | 2009-05-07 | Toyo Tire & Rubber Co Ltd | タイヤ成形型の製造方法及びタイヤ成形型 |
CN105793023A (zh) * | 2013-12-06 | 2016-07-20 | 米其林企业总公司 | 制造用于硫化轮胎的模具的模制元件的方法 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4942557B2 (ja) * | 2007-06-06 | 2012-05-30 | 東洋ゴム工業株式会社 | タイヤ加硫成形型 |
EP2197604B1 (en) * | 2007-09-21 | 2023-07-19 | Stolle Machinery Company, LLC | Shell press, and die assembly and associated method therefor |
MY172998A (en) * | 2008-09-03 | 2019-12-18 | Khong Fah Liew | Mould segments with indexing means and method of aligning mould segments |
AT512362A1 (de) * | 2012-01-13 | 2013-07-15 | Ifw Manfred Otte Gmbh | Formteil für ein werkzeug sowie daraus gebildetes werkzeug |
FR3014349B1 (fr) * | 2013-12-06 | 2016-10-21 | Michelin & Cie | Procede de decoupe de secteurs pour moules de pneumatiques |
JP6454082B2 (ja) * | 2014-04-23 | 2019-01-16 | 住友ゴム工業株式会社 | タイヤ形成用の剛性中子、及びそれを用いたタイヤの製造方法 |
WO2018029727A1 (ja) * | 2016-08-12 | 2018-02-15 | 東洋ゴム工業株式会社 | タイヤ加硫金型、タイヤ加硫装置及びタイヤの製造方法 |
WO2018029730A1 (ja) * | 2016-08-12 | 2018-02-15 | 東洋ゴム工業株式会社 | タイヤ加硫金型、タイヤ加硫装置及びタイヤの製造方法 |
US11318693B2 (en) | 2016-08-12 | 2022-05-03 | Toyo Tire Corporation | Tire vulcanization mold, tire vulcanization device, and tire production method |
WO2018029729A1 (ja) * | 2016-08-12 | 2018-02-15 | 東洋ゴム工業株式会社 | タイヤ加硫金型、タイヤ加硫装置及びタイヤの製造方法 |
JP6930875B2 (ja) * | 2017-08-22 | 2021-09-01 | 株式会社ブリヂストン | タイヤ加硫用金型の製造方法およびタイヤ加硫用金型 |
EP3603946B1 (en) * | 2018-08-01 | 2024-09-04 | Sumitomo Rubber Industries, Ltd. | Tyre mold, method for manufacturing tyre, and tyre |
CN113103480A (zh) * | 2021-04-01 | 2021-07-13 | 西北工业大学 | 一种用于大型固体火箭发动机壳体缠绕的分体式金属芯模 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH07314459A (ja) * | 1994-03-31 | 1995-12-05 | Ngk Insulators Ltd | タイヤ成形用金型 |
JP2004338182A (ja) * | 2003-05-14 | 2004-12-02 | Fuji Seiko Kk | タイヤトレッド面成形金型及びその製造方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US2030861A (en) * | 1934-06-26 | 1936-02-18 | Martin M Fisher | Tire retreading mold |
US2297017A (en) * | 1939-05-10 | 1942-09-29 | Max C Overman | Tire mold structure |
US2372217A (en) * | 1943-04-29 | 1945-03-27 | Donald M Macmillan | Recap mold |
DE2502185C3 (de) * | 1975-01-21 | 1982-02-04 | Continental Gummi-Werke Ag, 3000 Hannover | Vulkanisierform für Fahrzeugluftreifen |
US3999907A (en) * | 1976-04-05 | 1976-12-28 | Pappas Constantine G | Adjustable tire retread curing matrix |
JPS5658817A (en) * | 1979-10-18 | 1981-05-22 | Bridgestone Corp | Dividing method of ring shaped metal mold and cutting apparatus therefor |
IT1240295B (it) * | 1990-04-13 | 1993-12-07 | Pirelli | Stampo e metodo per la vulcanizzazione di pneumatici e metodo per fabbricare stampi |
JPH04341806A (ja) * | 1991-05-17 | 1992-11-27 | Bridgestone Corp | タイヤ加硫用金型及びその製作方法 |
BR0206652A (pt) * | 2001-01-24 | 2004-02-03 | Dme Co | Inserção substituìvel para trava de molde |
-
2004
- 2004-02-20 JP JP2004045293A patent/JP4329931B2/ja not_active Expired - Fee Related
-
2005
- 2005-02-15 WO PCT/JP2005/002239 patent/WO2005080061A1/ja active Application Filing
- 2005-02-15 CN CNB2005800053578A patent/CN100464962C/zh not_active Expired - Fee Related
- 2005-02-15 US US10/589,821 patent/US7377761B2/en active Active
- 2005-02-15 EP EP05719141A patent/EP1717003B1/en not_active Ceased
- 2005-02-15 DE DE602005013919T patent/DE602005013919D1/de active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07314459A (ja) * | 1994-03-31 | 1995-12-05 | Ngk Insulators Ltd | タイヤ成形用金型 |
JP2004338182A (ja) * | 2003-05-14 | 2004-12-02 | Fuji Seiko Kk | タイヤトレッド面成形金型及びその製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1717003A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009096052A (ja) * | 2007-10-16 | 2009-05-07 | Toyo Tire & Rubber Co Ltd | タイヤ成形型の製造方法及びタイヤ成形型 |
CN105793023A (zh) * | 2013-12-06 | 2016-07-20 | 米其林企业总公司 | 制造用于硫化轮胎的模具的模制元件的方法 |
CN105793023B (zh) * | 2013-12-06 | 2018-12-14 | 米其林企业总公司 | 制造用于硫化轮胎的模具的模制元件的方法 |
Also Published As
Publication number | Publication date |
---|---|
US20070166419A1 (en) | 2007-07-19 |
CN1921994A (zh) | 2007-02-28 |
JP2005231259A (ja) | 2005-09-02 |
EP1717003B1 (en) | 2009-04-15 |
EP1717003A1 (en) | 2006-11-02 |
EP1717003A4 (en) | 2008-04-16 |
US7377761B2 (en) | 2008-05-27 |
DE602005013919D1 (de) | 2009-05-28 |
CN100464962C (zh) | 2009-03-04 |
JP4329931B2 (ja) | 2009-09-09 |
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